sync with upstream sapi repo

.clang-format

@@ -1,4 +1,6 @@
 ---
 Language: Cpp
 BasedOnStyle: Google
+DerivePointerAlignment: false
+PointerAlignment: Left
 ...

.gitmodules

@@ -1,3 +1,12 @@
 [submodule "oss-internship-2020/sapi_lodepng/lodepng"]
 	path = oss-internship-2020/sapi_lodepng/lodepng
 	url = https://github.com/lvandeve/lodepng
+[submodule "oss-internship-2020/openjpeg/openjpeg"]
+	path = oss-internship-2020/openjpeg/openjpeg
+	url = https://github.com/uclouvain/openjpeg.git
+[submodule "oss-internship-2020/pffft/master"]
+	path = oss-internship-2020/pffft/master
+	url = https://bitbucket.org/jpommier/pffft/src/master/
+[submodule "oss-internship-2020/curl/curl_wrapper/curl"]
+	path = oss-internship-2020/curl/curl_wrapper/curl
+	url = https://github.com/curl/curl

CMakeLists.txt

@@ -14,6 +14,16 @@
 
 cmake_minimum_required(VERSION 3.12)
 
+# Fix Ninja generator output to not rebuild entire sub-trees needlessly.
+if(CMAKE_GENERATOR MATCHES "Ninja")
+  file(WRITE "${CMAKE_BINARY_DIR}/UserMakeRulesOverride.cmake"
+    "string(REPLACE \"-MD\" \"-MMD\" CMAKE_DEPFILE_FLAGS_C \"\${CMAKE_DEPFILE_FLAGS_C}\")\n"
+    "string(REPLACE \"-MD\" \"-MMD\" CMAKE_DEPFILE_FLAGS_CXX \"\${CMAKE_DEPFILE_FLAGS_CXX}\")\n"
+  )
+  set(CMAKE_USER_MAKE_RULES_OVERRIDE
+      "${CMAKE_BINARY_DIR}/UserMakeRulesOverride.cmake" CACHE INTERNAL "")
+endif()
+
 project(SandboxedAPI C CXX ASM)
 
 # SAPI-wide setting for the language level
@@ -31,15 +41,8 @@ include(SapiDeps)
 include(SapiUtil)
 include(SapiBuildDefs)
 
-# Fix Ninja generator output to not rebuild entire sub-trees needlessly.
-if(CMAKE_GENERATOR MATCHES "Ninja")
-  file(WRITE "${SAPI_BINARY_DIR}/UserMakeRulesOverride.cmake"
-    "STRING(REPLACE \"-MD\" \"-MMD\" CMAKE_DEPFILE_FLAGS_C \"\${CMAKE_DEPFILE_FLAGS_C}\")\n"
-    "STRING(REPLACE \"-MD\" \"-MMD\" CMAKE_DEPFILE_FLAGS_CXX \"\${CMAKE_DEPFILE_FLAGS_CXX}\")\n"
-  )
-  set(CMAKE_USER_MAKE_RULES_OVERRIDE
-      "${SAPI_BINARY_DIR}/UserMakeRulesOverride.cmake" CACHE INTERNAL "")
-endif()
+# Allow the header generator to auto-configure include paths
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
 if (SAPI_FORCE_COLOR_OUTPUT)
   if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")  # GCC

cmake/SapiBuildDefs.cmake

@@ -123,7 +123,7 @@ function(add_sapi_library)
   endif()
 
   # Interface
-  list_join(_sapi_FUNCTIONS "," _sapi_funcs)
+  list(JOIN _sapi_FUNCTIONS "," _sapi_funcs)
   foreach(src IN LISTS _sapi_INPUTS)
     get_filename_component(src "${src}" ABSOLUTE)
     list(APPEND _sapi_full_inputs "${src}")
@@ -132,7 +132,6 @@ function(add_sapi_library)
     set(_sapi_embed_dir "${CMAKE_CURRENT_BINARY_DIR}")
     set(_sapi_embed_name "${_sapi_NAME}")
   endif()
-  # TODO(cblichmann): Implement sapi_isystem
   if(SAPI_ENABLE_GENERATOR)
     add_custom_command(
       OUTPUT "${_sapi_gen_header}"
@@ -149,9 +148,14 @@ function(add_sapi_library)
       VERBATIM
     )
   else()
-    list_join(_sapi_full_inputs "," _sapi_full_inputs)
+    set(_sapi_isystem "${_sapi_NAME}.isystem")
+    list(JOIN _sapi_full_inputs "," _sapi_full_inputs)
     add_custom_command(
-      OUTPUT "${_sapi_gen_header}"
+      OUTPUT "${_sapi_gen_header}" "${_sapi_isystem}"
+      COMMAND sh -c
+              "${CMAKE_CXX_COMPILER} -E -x c++ -v /dev/null 2>&1 | \
+               awk '/> search starts here:/{f=1;next}/^End of search/{f=0}f{print $1}' \
+               > \"${_sapi_isystem}\""
       COMMAND "${SAPI_PYTHON3_EXECUTABLE}" -B
               "${SAPI_SOURCE_DIR}/sandboxed_api/tools/generator2/sapi_generator.py"
               "--sapi_name=${_sapi_LIBRARY_NAME}"
@@ -160,8 +164,10 @@ function(add_sapi_library)
               "--sapi_embed_name=${_sapi_embed_name}"
               "--sapi_functions=${_sapi_funcs}"
               "--sapi_ns=${_sapi_NAMESPACE}"
+              "--sapi_isystem=${_sapi_isystem}"
               "--sapi_in=${_sapi_full_inputs}"
       COMMENT "Generating interface"
+      VERBATIM
     )
   endif()
 

cmake/SapiUtil.cmake

@@ -35,16 +35,6 @@ function(create_directory_symlink SOURCE DESTINATION)
   endif()
 endfunction()
 
-# Implements list(JOIN ...) for CMake < 3.12.
-function(list_join LIST SEP OUTPUT)
-  foreach(item IN LISTS ${LIST})
-    set(_concat "${_concat}${SEP}${item}")
-  endforeach()
-  string(LENGTH "${SEP}" _len)
-  string(SUBSTRING "${_concat}" ${_len} -1 _concat)
-  set(${OUTPUT} "${_concat}" PARENT_SCOPE)
-endfunction()
-
 # Helper function that behaves just like Protobuf's protobuf_generate_cpp(),
 # except that it strips import paths. This is necessary, because CMake's
 # protobuf rules don't work well with imports across different directories.

cmake/abseil/CMakeLists.txt.in

@@ -18,7 +18,7 @@ project(absl-download NONE)
 include(ExternalProject)
 ExternalProject_Add(absl
   GIT_REPOSITORY    https://github.com/abseil/abseil-cpp
-  GIT_TAG           6e18c7115df9b7ca0987cc346b1b1d4b3cc829b3 # 2020-04-28
+  GIT_TAG           0e9921b75a0fdd639a504ec8443fc1fe801becd7 # 2020-09-02
   SOURCE_DIR        "${CMAKE_BINARY_DIR}/absl-src"
   BINARY_DIR        "${CMAKE_BINARY_DIR}/absl-build"
   CONFIGURE_COMMAND ""

oss-internship-2020/curl/.gitignore

@@ -0,0 +1 @@
+build/

oss-internship-2020/curl/CMakeLists.txt

@@ -0,0 +1,144 @@
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+cmake_minimum_required(VERSION 3.16)
+
+project(libcurl_sandbox)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED True)
+
+option(CURL_SAPI_ENABLE_EXAMPLES "" ON)
+option(CURL_SAPI_ENABLE_TESTS "" ON)
+
+# Add callbacks used by examples and tests
+if (CURL_SAPI_ENABLE_EXAMPLES OR CURL_SAPI_ENABLE_TESTS)
+  list(APPEND CURL_SAPI_CALLBACKS
+    "${CMAKE_CURRENT_SOURCE_DIR}/callbacks/callbacks.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/callbacks/callbacks.cc"
+  )
+endif()
+
+# Add folder containing the non-sandboxed custom curl library
+add_subdirectory(curl_wrapper)
+
+# Setup Sandboxed API
+set(SAPI_ROOT "" CACHE PATH "Path to the Sandboxed API source tree")
+set(SAPI_ENABLE_EXAMPLES ${CURL_SAPI_ENABLE_EXAMPLES} CACHE BOOL "" FORCE)
+set(SAPI_ENABLE_TESTS ${CURL_SAPI_ENABLE_TESTS} CACHE BOOL "" FORCE)
+add_subdirectory(
+  "${SAPI_ROOT}"
+  "${CMAKE_BINARY_DIR}/sandboxed-api-build"
+  EXCLUDE_FROM_ALL
+)
+
+# Generate SAPI header
+add_sapi_library(curl_sapi
+
+  # List of all the methods in https://curl.haxx.se/libcurl/c/allfuncs.html
+  # Some are added or modified because the original ones are not supported
+  # by Sandboxed API (details can be found in curl_wrapper.h)
+  FUNCTIONS curl_easy_cleanup
+            curl_easy_duphandle
+            curl_easy_escape
+            curl_easy_getinfo
+            curl_easy_getinfo_ptr
+            curl_easy_init
+            curl_easy_pause
+            curl_easy_perform
+            curl_easy_recv
+            curl_easy_reset
+            curl_easy_send
+            curl_easy_setopt
+            curl_easy_setopt_ptr
+            curl_easy_setopt_long
+            curl_easy_setopt_curl_off_t
+            curl_easy_strerror
+            curl_easy_unescape
+            curl_easy_upkeep
+            curl_free
+            curl_getdate_sapi
+            curl_global_cleanup
+            curl_global_init
+            curl_global_init_mem
+            curl_global_sslset
+            curl_mime_addpart
+            curl_mime_data
+            curl_mime_data_cb
+            curl_mime_encoder
+            curl_mime_filedata
+            curl_mime_filename
+            curl_mime_free
+            curl_mime_headers
+            curl_mime_init
+            curl_mime_name
+            curl_mime_subparts
+            curl_mime_type
+            curl_multi_add_handle
+            curl_multi_assign
+            curl_multi_cleanup
+            curl_multi_fdset_sapi
+            curl_multi_info_read
+            curl_multi_init
+            curl_multi_perform
+            curl_multi_remove_handle
+            curl_multi_setopt
+            curl_multi_setopt_ptr
+            curl_multi_setopt_long
+            curl_multi_setopt_curl_off_t
+            curl_multi_socket_action
+            curl_multi_strerror
+            curl_multi_timeout
+            curl_multi_poll_sapi
+            curl_multi_wait_sapi
+            curl_multi_wakeup
+            curl_share_init
+            curl_share_setopt
+            curl_share_setopt_ptr
+            curl_share_setopt_long
+            curl_share_strerror
+            curl_slist_append
+            curl_slist_free_all
+            curl_url
+            curl_url_cleanup
+            curl_url_dup
+            curl_url_get
+            curl_url_set
+            curl_version
+            curl_version_info
+
+  INPUTS curl_wrapper/curl/include/curl/curl.h
+         curl_wrapper/curl_wrapper.h
+
+  LIBRARY curl_wrapper_and_callbacks
+
+  LIBRARY_NAME Curl
+
+  NAMESPACE ""
+)
+
+# Include generated SAPI header
+target_include_directories(curl_sapi INTERFACE
+  "${PROJECT_BINARY_DIR}"
+)
+
+# Add examples
+if (CURL_SAPI_ENABLE_EXAMPLES)
+  add_subdirectory(examples)
+endif()
+
+# Add tests
+if (CURL_SAPI_ENABLE_TESTS)
+  add_subdirectory(tests)
+endif()

oss-internship-2020/curl/README.md

@@ -0,0 +1,112 @@
+# LibCurl Sandbox
+
+This library is a sandboxed version of curl's C API,
+[libcurl](https://curl.haxx.se/libcurl/c/), implemented using Sandboxed API.
+
+## Setup
+
+The repository can be cloned using: `git clone --recursive [URL to this repo]`
+The `--recursive` flag ensures that submodules are also cloned.
+
+Alternatively, if the repository has already been cloned but the submodules have
+not, these can be cloned using: `git submodule update --init --recursive`
+
+The full list of Sandboxed API dependencies can be found on
+[Sandboxed API Getting Started page](https://developers.google.com/sandboxed-api/docs/getting-started).
+
+The following commands, used from the current `curl/` directory, build the
+library: `mkdir -p build cd build cmake .. -G Ninja -D SAPI_ROOT=[path to
+sandboxed-api] cmake --build .`
+
+## Implementation details
+
+All of libcurl's methods are supported by the library. However, a few of these
+have different signatures defined in the sandboxed header `custom_curl.h`, which
+wraps and extends libcurl.
+
+This is necessary because Sandboxed API sandboxes most of libcurl correctly, but
+encounters some issues when sandboxing a few methods. The simplest solution is
+wrapping these methods into wrapper methods that accomplish the same tasks but
+can also be sandboxed.
+
+The next sections describe the issues encountered and contain some information
+on the signatures of the wrapper methods solving these issues.
+
+#### Variadic methods
+
+Variadic methods are currently not supported by Sandboxed API. To solve this,
+these methods are defined with an additional explicit parameter in
+`custom_curl.h`.
+
+The methods are: - `curl_easy_setopt`. Use `curl_easy_setopt_ptr`,
+`curl_easy_setopt_long` or `curl_easy_setopt_curl_off_t` instead. -
+`curl_easy_getinfo`. Use `curl_easy_getinfo_ptr` instead. - `curl_multi_setopt`.
+Use `curl_multi_setopt_ptr`, `curl_multi_setopt_long` or
+`curl_multi_setopt_curl_off_t` instead. - `curl_share_setopt`. Use
+`curl_share_setopt_ptr` or `curl_share_setopt_long` instead
+
+#### Methods with incomplete array arguments
+
+Incomplete array arguments are currently not supported by Sandboxed API. To
+solve this, methods taking an incomplete array argument have a wrapper in
+`custom_curl.h`, and take a pointer as the argument.
+
+The methods are: - `curl_multi_poll`. Use `curl_multi_poll_sapi` instead. -
+`curl_multi_wait`. Use `curl_multi_wait_sapi` instead.
+
+#### Methods with conflicts on the generated header
+
+Some methods create conflicts on the generated header because of redefined
+`#define` directives from files included by the header. To solve this, the
+conflicting types and methods are redefined in `custom_curl.h`.
+
+The types are: - `time_t`. Use `time_t_sapi` instead. - `fd_set`. Use
+`fd_set_sapi` instead.
+
+The methods are: - `curl_getdate`. Use `curl_getdate_sapi` instead. -
+`curl_multi_fdset`. Use `curl_multi_fdset_sapi` instead.
+
+#### Function pointers
+
+The functions whose pointers will be passed to the library's methods
+(*callbacks*) can't be implemented in the files making use of the library, but
+must be in other files. These files must be compiled together with the library,
+and this is done by adding their absolute path to the cmake variable
+`CURL_SAPI_CALLBACKS`.
+
+The pointers can then be obtained using an `RPCChannel` object, as shown in
+`example2.cc`.
+
+## Examples
+
+The `examples` directory contains the sandboxed versions of example source codes
+taken from [this page](https://curl.haxx.se/libcurl/c/example.html) on curl's
+website. More information about each example can be found in the examples'
+[README](examples/README.md).
+
+To build these examples when building the library, the cmake variable
+`CURL_SAPI_ENABLE_EXAMPLES` must be set to `ON`. This enables Sandboxed API
+examples as well.
+
+## Policy
+
+The `sandbox.h` file contains a policy allowing all is necessary for libcurl to
+perform simple requests. It is used by all the examples, except by example3.
+This example needs some additional policies and files in its namespace (since it
+uses HTTPS), and the file `example3.cc` shows how to easily extend an existing
+policy.
+
+## Testing
+
+The `tests` folder contains some test cases created using Google Test. The class
+`CurlTestUtils` is used to facilitate some tasks that all test cases need,
+including the setup of a mock local server on which test requests are performed.
+
+To build these tests when building the library, the cmake variable
+`CURL_SAPI_ENABLE_TESTS` must be set to `ON`. This enables Sandboxed API tests
+as well.
+
+## Callbacks
+
+The `callbacks.h` and `callbacks.cc` files implement all the callbacks used by
+examples and tests.

oss-internship-2020/curl/callbacks/callbacks.cc

@@ -0,0 +1,37 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "callbacks.h"  // NOLINT(build/include)
+
+#include <cstdlib>
+#include <cstring>
+
+#include "sandboxed_api/vars.h"
+
+size_t WriteToMemory(char* contents, size_t size, size_t num_bytes,
+                     void* userp) {
+  size_t real_size = size * num_bytes;
+  auto* mem = static_cast<sapi::LenValStruct*>(userp);
+
+  char* ptr = static_cast<char*>(realloc(mem->data, mem->size + real_size + 1));
+  if (ptr == nullptr) return 0;
+
+  mem->data = ptr;
+  auto data = static_cast<char*>(mem->data);
+  memcpy(&(data[mem->size]), contents, real_size);
+  mem->size += real_size;
+  data[mem->size] = 0;
+
+  return real_size;
+}

oss-internship-2020/curl/callbacks/callbacks.h

@@ -0,0 +1,24 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef TESTS_CALLBACKS_H
+#define TESTS_CALLBACKS_H
+
+#include <curl/curl.h>
+
+// Append contents to the string stored by userp, which is a sapi::LenValStruct*
+extern "C" size_t WriteToMemory(char* contents, size_t size, size_t num_bytes,
+                                void* userp);
+
+#endif  // TESTS_CALLBACKS_H

oss-internship-2020/curl/curl_wrapper/CMakeLists.txt

@@ -0,0 +1,37 @@
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Wrapper library including curl, wrappers for some methods and callbacks
+# The CURL_SAPI_CALLBACKS variable should contain the absolute paths of
+# all the files implementing the callbacks
+add_library(curl_wrapper_and_callbacks OBJECT
+  curl_wrapper.h
+  curl_wrapper.cc
+  "${CURL_SAPI_CALLBACKS}"
+)
+set_target_properties(curl_wrapper_and_callbacks
+  PROPERTIES LINKER_LANGUAGE C
+)
+
+# Flags needed to build curl statically
+set(CURL_HIDDEN_SYMBOLS OFF)
+set(BUILD_SHARED_LIBS OFF)
+
+# Link the wrapper to the original curl library (testing is disabled in curl)
+set(BUILD_TESTING OFF)
+add_subdirectory(curl)
+target_link_libraries(curl_wrapper_and_callbacks
+  CURL::libcurl
+  sapi::sapi
+)

oss-internship-2020/curl/curl_wrapper/curl_wrapper.cc

@@ -0,0 +1,86 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "curl_wrapper.h"  // NOLINT(build/include)
+
+CURLcode curl_easy_setopt_ptr(CURL* handle, CURLoption option,
+                              void* parameter) {
+  return curl_easy_setopt(handle, option, parameter);
+}
+
+CURLcode curl_easy_setopt_long(CURL* handle, CURLoption option,
+                               long parameter) {
+  return curl_easy_setopt(handle, option, parameter);
+}
+
+CURLcode curl_easy_setopt_curl_off_t(CURL* handle, CURLoption option,
+                                     curl_off_t parameter) {
+  return curl_easy_setopt(handle, option, parameter);
+}
+
+CURLcode curl_easy_getinfo_ptr(CURL* handle, CURLINFO option, void* parameter) {
+  return curl_easy_getinfo(handle, option, parameter);
+}
+
+time_t_sapi curl_getdate_sapi(char* datestring, time_t_sapi* now) {
+  return curl_getdate(datestring, now);
+}
+
+CURLMcode curl_multi_fdset_sapi(CURLM* multi_handle, fd_set_sapi* read_fd_set,
+                                fd_set_sapi* write_fd_set,
+                                fd_set_sapi* exc_fd_set, int* max_fd) {
+  return curl_multi_fdset(multi_handle, read_fd_set, write_fd_set, exc_fd_set,
+                          max_fd);
+}
+
+CURLMcode curl_multi_setopt_ptr(CURLM* handle, CURLMoption option,
+                                void* parameter) {
+  return curl_multi_setopt(handle, option, parameter);
+}
+
+CURLMcode curl_multi_setopt_long(CURLM* handle, CURLMoption option,
+                                 long parameter) {
+  return curl_multi_setopt(handle, option, parameter);
+}
+
+CURLMcode curl_multi_setopt_curl_off_t(CURLM* handle, CURLMoption option,
+                                       curl_off_t parameter) {
+  return curl_multi_setopt(handle, option, parameter);
+}
+
+CURLMcode curl_multi_poll_sapi(CURLM* multi_handle,
+                               struct curl_waitfd* extra_fds,
+                               unsigned int extra_nfds, int timeout_ms,
+                               int* numfds) {
+  return curl_multi_poll(multi_handle, extra_fds, extra_nfds, timeout_ms,
+                         numfds);
+}
+
+CURLMcode curl_multi_wait_sapi(CURLM* multi_handle,
+                               struct curl_waitfd* extra_fds,
+                               unsigned int extra_nfds, int timeout_ms,
+                               int* numfds) {
+  return curl_multi_wait(multi_handle, extra_fds, extra_nfds, timeout_ms,
+                         numfds);
+}
+
+CURLSHcode curl_share_setopt_ptr(CURLSH* handle, CURLSHoption option,
+                                 void* parameter) {
+  return curl_share_setopt(handle, option, parameter);
+}
+
+CURLSHcode curl_share_setopt_long(CURLSH* handle, CURLSHoption option,
+                                  long parameter) {
+  return curl_share_setopt(handle, option, parameter);
+}

oss-internship-2020/curl/curl_wrapper/curl_wrapper.h

@@ -0,0 +1,82 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Wrapper for curl library
+
+#ifndef CURL_WRAPPER_H
+#define CURL_WRAPPER_H
+
+#include <curl/curl.h>
+
+extern "C" {
+
+// The wrapper method is needed to make the variadic argument explicit
+CURLcode curl_easy_setopt_ptr(CURL* handle, CURLoption option, void* parameter);
+
+// The wrapper method is needed to make the variadic argument explicit
+CURLcode curl_easy_setopt_long(CURL* handle, CURLoption option, long parameter);
+
+// The wrapper method is needed to make the variadic argument explicit
+CURLcode curl_easy_setopt_curl_off_t(CURL* handle, CURLoption option,
+                                     curl_off_t parameter);
+
+// The wrapper method is needed to make the variadic argument explicit
+CURLcode curl_easy_getinfo_ptr(CURL* handle, CURLINFO option, void* parameter);
+
+// The typedef and wrapper method are needed because the original method has
+// some conflicts in curl_sapi.sapi.h
+typedef time_t time_t_sapi;
+time_t_sapi curl_getdate_sapi(char* datestring, time_t_sapi* now);
+
+// The typedef and wrapper method are needed because the original method has
+// some conflicts in curl_sapi.sapi.h
+typedef fd_set fd_set_sapi;
+CURLMcode curl_multi_fdset_sapi(CURLM* multi_handle, fd_set_sapi* read_fd_set,
+                                fd_set_sapi* write_fd_set,
+                                fd_set_sapi* exc_fd_set, int* max_fd);
+
+// The wrapper method is needed to make the variadic argument explicit
+CURLMcode curl_multi_setopt_ptr(CURLM* handle, CURLMoption option,
+                                void* parameter);
+
+// The wrapper method is needed to make the variadic argument explicit
+CURLMcode curl_multi_setopt_long(CURLM* handle, CURLMoption option,
+                                 long parameter);
+
+// The wrapper method is needed to make the variadic argument explicit
+CURLMcode curl_multi_setopt_curl_off_t(CURLM* handle, CURLMoption option,
+                                       curl_off_t parameter);
+
+// The wrapper method is needed because incomplete array type is not supported
+CURLMcode curl_multi_poll_sapi(CURLM* multi_handle,
+                               struct curl_waitfd* extra_fds,
+                               unsigned int extra_nfds, int timeout_ms,
+                               int* numfds);
+
+// The wrapper method is needed because incomplete array type is not supported
+CURLMcode curl_multi_wait_sapi(CURLM* multi_handle,
+                               struct curl_waitfd* extra_fds,
+                               unsigned int extra_nfds, int timeout_ms,
+                               int* numfds);
+
+// The wrapper method is needed to make the variadic argument explicit
+CURLSHcode curl_share_setopt_ptr(CURLSH* handle, CURLSHoption option,
+                                 void* parameter);
+
+// The wrapper method is needed to make the variadic argument explicit
+CURLSHcode curl_share_setopt_long(CURLSH* handle, CURLSHoption option,
+                                  long parameter);
+}
+
+#endif  // CURL_WRAPPER_H

oss-internship-2020/curl/examples/CMakeLists.txt

@@ -0,0 +1,76 @@
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# All the examples are sandboxed versions of curl's examples
+# (https://curl.haxx.se/libcurl/c/example.html)
+
+# Example 1: simple.c
+add_executable(example1
+  example1.cc
+  ../sandbox.h
+)
+target_link_libraries(example1 PRIVATE
+  curl_sapi
+  sapi::sapi
+)
+
+# Example 2: getinmemory.c
+add_executable(example2
+  example2.cc
+  ../sandbox.h
+)
+target_link_libraries(example2 PRIVATE
+  curl_sapi
+  sapi::sapi
+)
+
+# Example 3: simplessl.c
+add_executable(example3
+  example3.cc
+  ../sandbox.h
+)
+target_link_libraries(example3 PRIVATE
+  curl_sapi
+  sapi::sapi
+)
+
+# Example 4: multi-poll.c
+add_executable(example4
+  example4.cc
+  ../sandbox.h
+)
+target_link_libraries(example4 PRIVATE
+  curl_sapi
+  sapi::sapi
+)
+
+# Example 5: multithread.c
+add_executable(example5
+  example5.cc
+  ../sandbox.h
+)
+target_link_libraries(example5 PRIVATE
+  curl_sapi
+  sapi::sapi
+)
+
+# Example 6: simple.c (using transactions)
+add_executable(example6
+  example6.cc
+  ../sandbox.h
+)
+target_link_libraries(example6 PRIVATE
+  curl_sapi
+  sapi::sapi
+)

oss-internship-2020/curl/examples/README.md

@@ -0,0 +1,38 @@
+# LibCurl Sandbox Examples
+
+Each example in this folder is the sandboxed version of a code snippet from
+[this page](https://curl.haxx.se/libcurl/c/example.html) on curl's website.
+These examples perform some basic tasks using libcurl, and can be useful both to
+understand how to use LibCurl Sandbox, but also to get an idea of how regular
+and sandboxed code compare to each other.
+
+This is the list of the examples:
+
+-   **example1**: sandboxed version of
+    [simple.c](https://curl.haxx.se/libcurl/c/simple.html). Really simple HTTP
+    request, downloads and prints out the page at
+    [example.com](http://example.com).
+-   **example2**: sandboxed version of
+    [getinmemory.c](https://curl.haxx.se/libcurl/c/getinmemory.html). Same HTTP
+    request as example1. The difference is that this example uses a callback to
+    save the page directly in memory. Only the page size is printed out.
+-   **example3**: sandboxed version of
+    [simplessl.c](https://curl.haxx.se/libcurl/c/simplessl.html). HTTPS request
+    of the [example.com](https://example.com) page, using SSL authentication.
+    This script takes 4 arguments (SSL certificates file, SSL keys file, SSL
+    keys password and CA certificates files), and prints out the page.
+-   **example4**: sandboxed version of
+    [multi-poll.c](https://curl.haxx.se/libcurl/c/multi-poll.html). Same HTTP
+    request as example1, with the addition of a polling method that can be used
+    to track the status of the request. The page is printed out after it is
+    downloaded.
+-   **example5**: sandboxed version of
+    [multithread.c](https://curl.haxx.se/libcurl/c/multithread.html). Four HTTP
+    request of the pages [example.com](http://example.com),
+    [example.edu](http://example.edu), [example.net](http://example.net) and
+    [example.org](http://example.org), performed at the same time using
+    libcurl's multithreading methods. The pages are printed out.
+-   **example6**: sandboxed version of
+    [simple.c](https://curl.haxx.se/libcurl/c/simple.html). Performs the same
+    tasks as example1, but Sandbox API Transactions are used to show how they
+    can be used to perform a simple request.

oss-internship-2020/curl/examples/example1.cc

@@ -0,0 +1,78 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Sandboxed version of simple.c
+// Simple HTTP GET request
+
+#include <cstdlib>
+
+#include "../sandbox.h"  // NOLINT(build/include)
+
+int main(int argc, char* argv[]) {
+  gflags::ParseCommandLineFlags(&argc, &argv, true);
+  google::InitGoogleLogging(argv[0]);
+
+  absl::Status status;
+
+  // Initialize sandbox2 and sapi
+  CurlSapiSandbox sandbox;
+  status = sandbox.Init();
+  if (!status.ok()) {
+    LOG(FATAL) << "Couldn't initialize Sandboxed API: " << status;
+  }
+  CurlApi api(&sandbox);
+
+  // Initialize the curl session
+  absl::StatusOr<CURL*> curl_handle = api.curl_easy_init();
+  if (!curl_handle.ok()) {
+    LOG(FATAL) << "curl_easy_init failed: " << curl_handle.status();
+  }
+  sapi::v::RemotePtr curl(curl_handle.value());
+  if (!curl.GetValue()) LOG(FATAL) << "curl_easy_init failed: curl is NULL";
+
+  absl::StatusOr<int> curl_code;
+
+  // Specify URL to get
+  sapi::v::ConstCStr url("http://example.com");
+  curl_code = api.curl_easy_setopt_ptr(&curl, CURLOPT_URL, url.PtrBefore());
+  if (!curl_code.ok() || curl_code.value() != CURLE_OK) {
+    LOG(FATAL) << "curl_easy_setopt_ptr failed: " << curl_code.status();
+  }
+
+  // Set the library to follow a redirection
+  curl_code = api.curl_easy_setopt_long(&curl, CURLOPT_FOLLOWLOCATION, 1l);
+  if (!curl_code.ok() || curl_code.value() != CURLE_OK) {
+    LOG(FATAL) << "curl_easy_setopt_long failed: " << curl_code.status();
+  }
+
+  // Disable authentication of peer certificate
+  curl_code = api.curl_easy_setopt_long(&curl, CURLOPT_SSL_VERIFYPEER, 0l);
+  if (!curl_code.ok() || curl_code.value() != CURLE_OK) {
+    LOG(FATAL) << "curl_easy_setopt_long failed: " << curl_code.status();
+  }
+
+  // Perform the request
+  curl_code = api.curl_easy_perform(&curl);
+  if (!curl_code.ok() || curl_code.value() != CURLE_OK) {
+    LOG(FATAL) << "curl_easy_perform failed: " << curl_code.status();
+  }
+
+  // Cleanup curl
+  status = api.curl_easy_cleanup(&curl);
+  if (!status.ok()) {
+    LOG(FATAL) << "curl_easy_cleanup failed: " << status;
+  }
+
+  return EXIT_SUCCESS;
+}

oss-internship-2020/curl/examples/example2.cc

@@ -0,0 +1,107 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Sandboxed version of getinmemory.c
+// HTTP GET request using callbacks
+
+#include <cstdlib>
+#include <iostream>
+
+#include "../sandbox.h"  // NOLINT(build/include)
+
+int main(int argc, char* argv[]) {
+  gflags::ParseCommandLineFlags(&argc, &argv, true);
+  google::InitGoogleLogging(argv[0]);
+
+  absl::Status status;
+
+  // Initialize sandbox2 and sapi
+  CurlSapiSandbox sandbox;
+  status = sandbox.Init();
+  if (!status.ok()) {
+    LOG(FATAL) << "Couldn't initialize Sandboxed API: " << status;
+  }
+  CurlApi api(&sandbox);
+
+  // Generate pointer to WriteMemoryCallback function
+  void* function_ptr;
+  status = sandbox.rpc_channel()->Symbol("WriteToMemory", &function_ptr);
+  if (!status.ok()) {
+    LOG(FATAL) << "sapi::Sandbox::rpc_channel().Symbol failed: " << status;
+  }
+  sapi::v::RemotePtr remote_function_ptr(function_ptr);
+
+  // Initialize the curl session
+  absl::StatusOr<CURL*> curl_handle = api.curl_easy_init();
+  if (!curl_handle.ok()) {
+    LOG(FATAL) << "curl_easy_init failed: " << curl_handle.status();
+  }
+  sapi::v::RemotePtr curl(curl_handle.value());
+  if (!curl.GetValue()) {
+    LOG(FATAL) << "curl_easy_init failed: curl is NULL";
+  }
+
+  absl::StatusOr<int> curl_code;
+
+  // Specify URL to get
+  sapi::v::ConstCStr url("http://example.com");
+  curl_code = api.curl_easy_setopt_ptr(&curl, CURLOPT_URL, url.PtrBefore());
+  if (!curl_code.ok() || curl_code.value() != CURLE_OK) {
+    LOG(FATAL) << "curl_easy_setopt_ptr failed: " << curl_code.status();
+  }
+
+  // Set WriteMemoryCallback as the write function
+  curl_code = api.curl_easy_setopt_ptr(&curl, CURLOPT_WRITEFUNCTION,
+                                       &remote_function_ptr);
+  if (!curl_code.ok() || curl_code.value() != CURLE_OK) {
+    LOG(FATAL) << "curl_easy_setopt_ptr failed: " << curl_code.status();
+  }
+
+  // Pass 'chunk' struct to the callback function
+  sapi::v::LenVal chunk(0);
+  curl_code =
+      api.curl_easy_setopt_ptr(&curl, CURLOPT_WRITEDATA, chunk.PtrBoth());
+  if (!curl_code.ok() || curl_code.value() != CURLE_OK) {
+    LOG(FATAL) << "curl_easy_setopt_ptr failed: " << curl_code.status();
+  }
+
+  // Set a user agent
+  sapi::v::ConstCStr user_agent("libcurl-agent/1.0");
+  curl_code = api.curl_easy_setopt_ptr(&curl, CURLOPT_USERAGENT,
+                                       user_agent.PtrBefore());
+  if (!curl_code.ok() || curl_code.value() != CURLE_OK) {
+    LOG(FATAL) << "curl_easy_setopt_ptr failed: " << curl_code.status();
+  }
+
+  // Perform the request
+  curl_code = api.curl_easy_perform(&curl);
+  if (!curl_code.ok() || curl_code.value() != CURLE_OK) {
+    LOG(FATAL) << "curl_easy_perform failed: " << curl_code.status();
+  }
+
+  // Retrieve memory size
+  status = sandbox.TransferFromSandboxee(&chunk);
+  if (!status.ok()) {
+    LOG(FATAL) << "sandbox.TransferFromSandboxee failed: " << status;
+  }
+  std::cout << "memory size: " << chunk.GetDataSize() << " bytes" << std::endl;
+
+  // Cleanup curl
+  status = api.curl_easy_cleanup(&curl);
+  if (!status.ok()) {
+    LOG(FATAL) << "curl_easy_cleanup failed: " << status;
+  }
+
+  return EXIT_SUCCESS;
+}

oss-internship-2020/curl/examples/example3.cc

@@ -0,0 +1,166 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Sandboxed version of simplessl.c
+// HTTPS GET request
+
+#include <cstdlib>
+
+#include "../sandbox.h"  // NOLINT(build/include)
+
+class CurlSapiSandboxEx3 : public CurlSapiSandbox {
+ public:
+  CurlSapiSandboxEx3(std::string ssl_certificate, std::string ssl_key,
+                     std::string ca_certificates)
+      : ssl_certificate(ssl_certificate),
+        ssl_key(ssl_key),
+        ca_certificates(ca_certificates) {}
+
+ private:
+  std::unique_ptr<sandbox2::Policy> ModifyPolicy(
+      sandbox2::PolicyBuilder*) override {
+    // Add the syscalls and files missing in CurlSandbox to a new PolicyBuilder
+    auto policy_builder = std::make_unique<sandbox2::PolicyBuilder>();
+    (*policy_builder)
+        .AllowFutexOp(FUTEX_WAIT_PRIVATE)
+        .AllowGetPIDs()
+        .AllowGetRandom()
+        .AllowHandleSignals()
+        .AllowSyscall(__NR_sysinfo)
+        .AddFile(ssl_certificate)
+        .AddFile(ssl_key)
+        .AddFile(ca_certificates);
+    // Provide the new PolicyBuilder to ModifyPolicy in CurlSandbox
+    return CurlSapiSandbox::ModifyPolicy(policy_builder.get());
+  }
+
+  std::string ssl_certificate;
+  std::string ssl_key;
+  std::string ca_certificates;
+};
+
+int main(int argc, char* argv[]) {
+  gflags::ParseCommandLineFlags(&argc, &argv, true);
+  google::InitGoogleLogging(argv[0]);
+
+  absl::Status status;
+
+  // Get input parameters (should be absolute paths)
+  if (argc != 5) {
+    LOG(FATAL) << "wrong number of arguments (4 expected)";
+  }
+  std::string ssl_certificate = argv[1];
+  std::string ssl_key = argv[2];
+  std::string ssl_key_password = argv[3];
+  std::string ca_certificates = argv[4];
+
+  // Initialize sandbox2 and sapi
+  CurlSapiSandboxEx3 sandbox(ssl_certificate, ssl_key, ca_certificates);
+  status = sandbox.Init();
+  if (!status.ok()) {
+    LOG(FATAL) << "Couldn't initialize Sandboxed API: " << status;
+  }
+  CurlApi api(&sandbox);
+
+  absl::StatusOr<int> curl_code;
+
+  // Initialize curl (CURL_GLOBAL_DEFAULT = 3)
+  curl_code = api.curl_global_init(3l);
+  if (!curl_code.ok() || curl_code.value() != CURLE_OK) {
+    LOG(FATAL) << "curl_global_init failed: " << curl_code.status();
+  }
+
+  // Initialize curl easy handle
+  absl::StatusOr<CURL*> curl_handle = api.curl_easy_init();
+  if (!curl_handle.ok()) {
+    LOG(FATAL) << "curl_easy_init failed: " << curl_handle.status();
+  }
+  sapi::v::RemotePtr curl(curl_handle.value());
+  if (!curl.GetValue()) {
+    LOG(FATAL) << "curl_easy_init failed: curl is NULL";
+  }
+
+  // Specify URL to get (using HTTPS)
+  sapi::v::ConstCStr url("https://example.com");
+  curl_code = api.curl_easy_setopt_ptr(&curl, CURLOPT_URL, url.PtrBefore());
+  if (!curl_code.ok() || curl_code.value() != CURLE_OK) {
+    LOG(FATAL) << "curl_easy_setopt_ptr failed: " << curl_code.status();
+  }
+
+  // Set the SSL certificate type to "PEM"
+  sapi::v::ConstCStr ssl_cert_type("PEM");
+  curl_code = api.curl_easy_setopt_ptr(&curl, CURLOPT_SSLCERTTYPE,
+                                       ssl_cert_type.PtrBefore());
+  if (!curl_code.ok() || curl_code.value() != CURLE_OK) {
+    LOG(FATAL) << "curl_easy_setopt_ptr failed: " << curl_code.status();
+  }
+
+  // Set the certificate for client authentication
+  sapi::v::ConstCStr sapi_ssl_certificate(ssl_certificate.c_str());
+  curl_code = api.curl_easy_setopt_ptr(&curl, CURLOPT_SSLCERT,
+                                       sapi_ssl_certificate.PtrBefore());
+  if (!curl_code.ok() || curl_code.value() != CURLE_OK) {
+    LOG(FATAL) << "curl_easy_setopt_ptr failed: " << curl_code.status();
+  }
+
+  // Set the private key for client authentication
+  sapi::v::ConstCStr sapi_ssl_key(ssl_key.c_str());
+  curl_code =
+      api.curl_easy_setopt_ptr(&curl, CURLOPT_SSLKEY, sapi_ssl_key.PtrBefore());
+  if (!curl_code.ok() || curl_code.value() != CURLE_OK) {
+    LOG(FATAL) << "curl_easy_setopt_ptr failed: " << curl_code.status();
+  }
+
+  // Set the password used to protect the private key
+  sapi::v::ConstCStr sapi_ssl_key_password(ssl_key_password.c_str());
+  curl_code = api.curl_easy_setopt_ptr(&curl, CURLOPT_KEYPASSWD,
+                                       sapi_ssl_key_password.PtrBefore());
+  if (!curl_code.ok() || curl_code.value() != CURLE_OK) {
+    LOG(FATAL) << "curl_easy_setopt_ptr failed: " << curl_code.status();
+  }
+
+  // Set the file with the certificates vaildating the server
+  sapi::v::ConstCStr sapi_ca_certificates(ca_certificates.c_str());
+  curl_code = api.curl_easy_setopt_ptr(&curl, CURLOPT_CAINFO,
+                                       sapi_ca_certificates.PtrBefore());
+  if (!curl_code.ok() || curl_code.value() != CURLE_OK) {
+    LOG(FATAL) << "curl_easy_setopt_ptr failed: " << curl_code.status();
+  }
+
+  // Verify the authenticity of the server
+  curl_code = api.curl_easy_setopt_long(&curl, CURLOPT_SSL_VERIFYPEER, 1L);
+  if (!curl_code.ok() || curl_code.value() != CURLE_OK) {
+    LOG(FATAL) << "curl_easy_setopt_long failed: " << curl_code.status();
+  }
+
+  // Perform the request
+  curl_code = api.curl_easy_perform(&curl);
+  if (!curl_code.ok() || curl_code.value() != CURLE_OK) {
+    LOG(FATAL) << "curl_easy_perform failed: " << curl_code.status();
+  }
+
+  // Cleanup curl easy handle
+  status = api.curl_easy_cleanup(&curl);
+  if (!status.ok()) {
+    LOG(FATAL) << "curl_easy_cleanup failed: " << status;
+  }
+
+  // Cleanup curl
+  status = api.curl_global_cleanup();
+  if (!status.ok()) {
+    LOG(FATAL) << "curl_global_cleanup failed: " << status;
+  }
+
+  return EXIT_SUCCESS;
+}

oss-internship-2020/curl/examples/example4.cc

@@ -0,0 +1,128 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Sandboxed version of multi-poll.c
+// HTTP GET request with polling
+
+#include <cstdlib>
+
+#include "../sandbox.h"      // NOLINT(build/include)
+#include "curl_sapi.sapi.h"  // NOLINT(build/include)
+#include "sandboxed_api/util/flag.h"
+
+int main(int argc, char* argv[]) {
+  gflags::ParseCommandLineFlags(&argc, &argv, true);
+  google::InitGoogleLogging(argv[0]);
+
+  absl::Status status;
+
+  // Initialize sandbox2 and sapi
+  CurlSapiSandbox sandbox;
+  status = sandbox.Init();
+  if (!status.ok()) {
+    LOG(FATAL) << "Couldn't initialize Sandboxed API: " << status;
+  }
+  CurlApi api(&sandbox);
+
+  // Number of running handles
+  sapi::v::Int still_running(1);
+
+  absl::StatusOr<int> curl_code;
+
+  // Initialize curl (CURL_GLOBAL_DEFAULT = 3)
+  curl_code = api.curl_global_init(3l);
+  if (!curl_code.ok() || curl_code.value() != CURLE_OK) {
+    LOG(FATAL) << "curl_global_init failed: " << curl_code.status();
+  }
+
+  // Initialize http_handle
+  absl::StatusOr<CURL*> curl_handle = api.curl_easy_init();
+  if (!curl_handle.ok()) {
+    LOG(FATAL) << "curl_easy_init failed: " << curl_handle.status();
+  }
+  sapi::v::RemotePtr http_handle(curl_handle.value());
+  if (!http_handle.GetValue()) {
+    LOG(FATAL) << "curl_easy_init failed: http_handle is NULL";
+  }
+
+  // Specify URL to get
+  sapi::v::ConstCStr url("http://example.com");
+  curl_code =
+      api.curl_easy_setopt_ptr(&http_handle, CURLOPT_URL, url.PtrBefore());
+  if (!curl_code.ok() || curl_code.value() != CURLE_OK) {
+    LOG(FATAL) << "curl_easy_setopt_ptr failed: " << curl_code.status();
+  }
+
+  // Initialize multi_handle
+  absl::StatusOr<CURLM*> curlm_handle = api.curl_multi_init();
+  if (!curlm_handle.ok()) {
+    LOG(FATAL) << "curl_multi_init failed: " << curlm_handle.status();
+  }
+  sapi::v::RemotePtr multi_handle(curlm_handle.value());
+  if (!multi_handle.GetValue()) {
+    LOG(FATAL) << "curl_multi_init failed: multi_handle is NULL";
+  }
+
+  // Add http_handle to the multi stack
+  curl_code = api.curl_multi_add_handle(&multi_handle, &http_handle);
+  if (!curl_code.ok() || curl_code.value() != CURLE_OK) {
+    LOG(FATAL) << "curl_multi_add_handle failed: " << curl_code.status();
+  }
+
+  while (still_running.GetValue()) {
+    sapi::v::Int numfds(0);
+
+    // Perform the request
+    curl_code = api.curl_multi_perform(&multi_handle, still_running.PtrBoth());
+    if (!curl_code.ok() || curl_code.value() != CURLE_OK) {
+      LOG(FATAL) << "curl_mutli_perform failed: " << curl_code.status();
+    }
+
+    if (still_running.GetValue()) {
+      // Wait for an event or timeout
+      sapi::v::NullPtr null_ptr;
+      curl_code = api.curl_multi_poll_sapi(&multi_handle, &null_ptr, 0, 1000,
+                                           numfds.PtrBoth());
+      if (!curl_code.ok() || curl_code.value() != CURLE_OK) {
+        LOG(FATAL) << "curl_multi_poll_sapi failed: " << curl_code.status();
+      }
+    }
+  }
+
+  // Remove http_handle from the multi stack
+  curl_code = api.curl_multi_remove_handle(&multi_handle, &http_handle);
+  if (!curl_code.ok() || curl_code.value() != CURLE_OK) {
+    LOG(FATAL) << "curl_multi_remove_handle failed: " << curl_code.status();
+  }
+
+  // Cleanup http_handle
+  status = api.curl_easy_cleanup(&http_handle);
+  if (!status.ok()) {
+    LOG(FATAL) << "curl_easy_cleanup failed: " << status;
+  }
+
+  // Cleanup multi_handle
+  curl_code = api.curl_multi_cleanup(&multi_handle);
+  if (!curl_code.ok() || curl_code.value() != CURLE_OK) {
+    LOG(FATAL) << "curl_multi_cleanup failed: " << curl_code.status();
+  }
+
+  // Cleanup curl
+  status = api.curl_global_cleanup();
+  if (!status.ok()) {
+    LOG(FATAL) << "curl_global_cleanup failed: " << status;
+  }
+
+  return EXIT_SUCCESS;
+}

oss-internship-2020/curl/examples/example5.cc

@@ -0,0 +1,102 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Sandboxed version of multithread.c
+// Multithreaded HTTP GET requests
+
+#include <pthread.h>
+
+#include <cstdlib>
+
+#include "../sandbox.h"  // NOLINT(build/include)
+
+void pull_one_url(const std::string& url, CurlApi& api) {
+  // Initialize the curl session
+  absl::StatusOr<CURL*> curl_handle = api.curl_easy_init();
+  if (!curl_handle.ok()) {
+    LOG(FATAL) << "curl_easy_init failed: " << curl_handle.status();
+  }
+  sapi::v::RemotePtr curl(curl_handle.value());
+  if (!curl.GetValue()) {
+    LOG(FATAL) << "curl_easy_init failed: curl is NULL";
+  }
+
+  absl::StatusOr<int> curl_code;
+
+  // Specify URL to get
+  sapi::v::ConstCStr sapi_url(url.c_str());
+  curl_code =
+      api.curl_easy_setopt_ptr(&curl, CURLOPT_URL, sapi_url.PtrBefore());
+  if (!curl_code.ok() || curl_code.value() != CURLE_OK) {
+    LOG(FATAL) << "curl_easy_setopt_ptr failed: " << curl_code.status();
+  }
+
+  // Perform the request
+  curl_code = api.curl_easy_perform(&curl);
+  if (!curl_code.ok() || curl_code.value() != CURLE_OK) {
+    LOG(FATAL) << "curl_easy_perform failed: " << curl_code.status();
+  }
+
+  // Cleanup curl
+  absl::Status status = api.curl_easy_cleanup(&curl);
+  if (!status.ok()) {
+    LOG(FATAL) << "curl_easy_cleanup failed: " << status;
+  }
+}
+
+const std::vector<std::string> urls = {
+    "http://example.com", "http://example.edu", "http://example.net",
+    "http://example.org"};
+
+int main(int argc, char* argv[]) {
+  gflags::ParseCommandLineFlags(&argc, &argv, true);
+  google::InitGoogleLogging(argv[0]);
+
+  absl::Status status;
+
+  // Initialize sandbox2 and sapi
+  CurlSapiSandbox sandbox;
+  status = sandbox.Init();
+  if (!status.ok()) {
+    LOG(FATAL) << "Couldn't initialize Sandboxed API: " << status;
+  }
+  CurlApi api(&sandbox);
+
+  absl::StatusOr<int> curl_code;
+
+  // Initialize curl (CURL_GLOBAL_DEFAULT = 3)
+  curl_code = api.curl_global_init(3l);
+  if (!curl_code.ok() || curl_code.value() != CURLE_OK) {
+    LOG(FATAL) << "curl_global_init failed: " << curl_code.status();
+  }
+
+  // Create the threads
+  std::vector<std::thread> threads;
+  for (auto& url : urls) {
+    threads.emplace_back(pull_one_url, std::ref(url), std::ref(api));
+  }
+
+  // Join the threads
+  for (auto& thread : threads) {
+    thread.join();
+  }
+
+  // Cleanup curl
+  status = api.curl_global_cleanup();
+  if (!status.ok()) {
+    LOG(FATAL) << "curl_global_cleanup failed: " << status;
+  }
+
+  return EXIT_SUCCESS;
+}

oss-internship-2020/curl/examples/example6.cc

@@ -0,0 +1,72 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Sandboxed version of simple.c using transactions
+// Simple HTTP GET request
+
+#include <cstdlib>
+
+#include "../sandbox.h"  // NOLINT(build/include)
+#include "sandboxed_api/transaction.h"
+
+class CurlTransaction : public sapi::Transaction {
+ public:
+  explicit CurlTransaction(std::unique_ptr<sapi::Sandbox> sandbox)
+      : sapi::Transaction(std::move(sandbox)) {
+    sapi::Transaction::SetTimeLimit(kTimeOutVal);
+  }
+
+ private:
+  // Default timeout value for each transaction run.
+  static constexpr time_t kTimeOutVal = 2;
+
+  // The main processing function.
+  absl::Status Main() override;
+};
+
+absl::Status CurlTransaction::Main() {
+  CurlApi api(sandbox());
+
+  // Initialize the curl session
+  SAPI_ASSIGN_OR_RETURN(void* curl_remote, api.curl_easy_init());
+  sapi::v::RemotePtr curl(curl_remote);
+  TRANSACTION_FAIL_IF_NOT(curl.GetValue(), "curl_easy_init failed");
+
+  // Specify URL to get
+  sapi::v::ConstCStr url("http://example.com");
+  SAPI_ASSIGN_OR_RETURN(
+      int setopt_url_code,
+      api.curl_easy_setopt_ptr(&curl, CURLOPT_URL, url.PtrBefore()));
+  TRANSACTION_FAIL_IF_NOT(setopt_url_code == CURLE_OK,
+                          "curl_easy_setopt_ptr failed");
+
+  // Perform the request
+  SAPI_ASSIGN_OR_RETURN(int perform_code, api.curl_easy_perform(&curl));
+  TRANSACTION_FAIL_IF_NOT(setopt_url_code == CURLE_OK,
+                          "curl_easy_perform failed");
+
+  // Cleanup curl
+  TRANSACTION_FAIL_IF_NOT(api.curl_easy_cleanup(&curl).ok(),
+                          "curl_easy_cleanup failed");
+
+  return absl::OkStatus();
+}
+
+int main(int argc, char* argv[]) {
+  CurlTransaction curl{std::make_unique<CurlSapiSandbox>()};
+  absl::Status status = curl.Run();
+  CHECK(status.ok()) << "CurlTransaction failed";
+
+  return EXIT_SUCCESS;
+}

oss-internship-2020/curl/sandbox.h

@@ -0,0 +1,67 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef SANDBOX_H_
+#define SANDBOX_H_
+
+#include <linux/futex.h>
+#include <sys/mman.h>  // For mmap arguments
+#include <syscall.h>
+
+#include <cstdlib>
+
+#include "curl_sapi.sapi.h"  // NOLINT(build/include)
+#include "sandboxed_api/sandbox2/util/bpf_helper.h"
+
+class CurlSapiSandbox : public CurlSandbox {
+ protected:
+  std::unique_ptr<sandbox2::Policy> ModifyPolicy(
+      sandbox2::PolicyBuilder* policy_builder) override {
+    // Return a new policy
+    return (*policy_builder)
+        .AllowDynamicStartup()
+        .AllowExit()
+        .AllowFork()
+        .AllowFutexOp(FUTEX_WAKE_PRIVATE)
+        .AllowMmap()
+        .AllowOpen()
+        .AllowRead()
+        .AllowSafeFcntl()
+        .AllowWrite()
+        .AllowSyscalls({
+            __NR_accept,
+            __NR_access,
+            __NR_bind,
+            __NR_connect,
+            __NR_getpeername,
+            __NR_getsockname,
+            __NR_getsockopt,
+            __NR_ioctl,
+            __NR_listen,
+            __NR_madvise,
+            __NR_poll,
+            __NR_recvfrom,
+            __NR_recvmsg,
+            __NR_sendmmsg,
+            __NR_sendto,
+            __NR_setsockopt,
+            __NR_socket,
+        })
+        .AllowUnrestrictedNetworking()
+        .AddDirectory("/lib")
+        .BuildOrDie();
+  }
+};
+
+#endif  // SANDBOX_H_

oss-internship-2020/curl/tests/CMakeLists.txt

@@ -0,0 +1,28 @@
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+include(GoogleTest)
+
+add_executable(tests
+  test_utils.h
+  test_utils.cc
+  tests.cc
+)
+
+target_link_libraries(tests
+  curl_sapi sapi::sapi
+  gtest gmock gtest_main
+)
+
+gtest_discover_tests(tests)

oss-internship-2020/curl/tests/test_utils.cc

@@ -0,0 +1,301 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "test_utils.h"  // NOLINT(build/include)
+
+#include <absl/strings/match.h>
+#include <fcntl.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <memory>
+#include <thread>  // NOLINT(build/c++11)
+
+int CurlTestUtils::port_;
+std::thread CurlTestUtils::server_thread_;
+
+absl::Status CurlTestUtils::CurlTestSetUp() {
+  // Initialize sandbox2 and sapi
+  sandbox_ = std::make_unique<CurlSapiSandbox>();
+  absl::Status init = sandbox_->Init();
+  if (!init.ok()) {
+    return init;
+  }
+  api_ = std::make_unique<CurlApi>(sandbox_.get());
+
+  // Initialize curl
+  absl::StatusOr<CURL*> curl_handle = api_->curl_easy_init();
+  if (!curl_handle.ok()) {
+    return curl_handle.status();
+  }
+  if (!curl_handle.value()) {
+    return absl::UnavailableError("curl_easy_init returned NULL ");
+  }
+  curl_ = std::make_unique<sapi::v::RemotePtr>(curl_handle.value());
+
+  absl::StatusOr<int> curl_code;
+
+  // Specify request URL
+  sapi::v::ConstCStr sapi_url(kUrl.data());
+  curl_code = api_->curl_easy_setopt_ptr(curl_.get(), CURLOPT_URL,
+                                         sapi_url.PtrBefore());
+  if (!curl_code.ok()) {
+    return curl_code.status();
+  }
+  if (curl_code.value() != CURLE_OK) {
+    return absl::UnavailableError(
+        "curl_easy_setopt_ptr returned with the error code " +
+        curl_code.value());
+  }
+
+  // Set port
+  curl_code = api_->curl_easy_setopt_long(curl_.get(), CURLOPT_PORT, port_);
+  if (!curl_code.ok()) {
+    return curl_code.status();
+  }
+  if (curl_code.value() != CURLE_OK) {
+    return absl::UnavailableError(
+        "curl_easy_setopt_long returned with the error code " +
+        curl_code.value());
+  }
+
+  // Generate pointer to the WriteToMemory callback
+  void* function_ptr;
+  absl::Status symbol =
+      sandbox_->rpc_channel()->Symbol("WriteToMemory", &function_ptr);
+  if (!symbol.ok()) {
+    return symbol;
+  }
+  sapi::v::RemotePtr remote_function_ptr(function_ptr);
+
+  // Set WriteToMemory as the write function
+  curl_code = api_->curl_easy_setopt_ptr(curl_.get(), CURLOPT_WRITEFUNCTION,
+                                         &remote_function_ptr);
+  if (!curl_code.ok()) {
+    return curl_code.status();
+  }
+  if (curl_code.value() != CURLE_OK) {
+    return absl::UnavailableError(
+        "curl_easy_setopt_ptr returned with the error code " +
+        curl_code.value());
+  }
+
+  // Pass memory chunk object to the callback
+  chunk_ = std::make_unique<sapi::v::LenVal>(0);
+  curl_code = api_->curl_easy_setopt_ptr(curl_.get(), CURLOPT_WRITEDATA,
+                                         chunk_->PtrBoth());
+  if (!curl_code.ok()) {
+    return curl_code.status();
+  }
+  if (curl_code.value() != CURLE_OK) {
+    return absl::UnavailableError(
+        "curl_easy_setopt_ptr returned with the error code " +
+        curl_code.value());
+  }
+
+  return absl::OkStatus();
+}
+
+absl::Status CurlTestUtils::CurlTestTearDown() {
+  // Cleanup curl
+  return api_->curl_easy_cleanup(curl_.get());
+}
+
+absl::StatusOr<std::string> CurlTestUtils::PerformRequest() {
+  // Perform the request
+  absl::StatusOr<int> curl_code = api_->curl_easy_perform(curl_.get());
+  if (!curl_code.ok()) {
+    return curl_code.status();
+  }
+  if (curl_code.value() != CURLE_OK) {
+    return absl::UnavailableError(
+        "curl_easy_perform returned with the error code " + curl_code.value());
+  }
+
+  // Get pointer to the memory chunk
+  absl::Status status = sandbox_->TransferFromSandboxee(chunk_.get());
+  if (!status.ok()) {
+    return status;
+  }
+
+  return std::string{reinterpret_cast<char*>(chunk_->GetData())};
+}
+
+namespace {
+
+// Read the socket until str is completely read
+std::string ReadUntil(const int socket, const std::string& str,
+                      const size_t max_request_size) {
+  std::string str_read;
+  str_read.reserve(max_request_size);
+
+  // Read one char at a time until str is suffix of buf
+  while (!absl::EndsWith(str_read, str)) {
+    char next_char;
+    if (str_read.size() >= max_request_size ||
+        read(socket, &next_char, 1) < 1) {
+      return "";
+    }
+    str_read += next_char;
+  }
+
+  return str_read;
+}
+
+// Parse HTTP headers to return the Content-Length
+ssize_t GetContentLength(const std::string& headers) {
+  // Find the Content-Length header
+  std::string::size_type length_header_start = headers.find("Content-Length: ");
+
+  // There is no Content-Length field
+  if (length_header_start == std::string::npos) {
+    return 0;
+  }
+
+  // Find Content-Length string
+  std::string::size_type length_start =
+      length_header_start + std::string{"Content-Length: "}.size();
+  std::string::size_type length_bytes =
+      headers.find("\r\n", length_start) - length_start;
+
+  // length_bytes exceeds maximum
+  if (length_bytes >= 64) {
+    return -1;
+  }
+
+  // Convert string to int and return
+  return std::stoi(headers.substr(length_start, length_bytes));
+}
+
+// Read exactly content_bytes from the socket
+std::string ReadExact(int socket, size_t content_bytes) {
+  std::string str_read;
+  str_read.reserve(content_bytes);
+
+  // Read one char at a time until all chars are read
+  while (str_read.size() < content_bytes) {
+    char next_char;
+    if (read(socket, &next_char, 1) < 1) {
+      return "";
+    }
+    str_read += next_char;
+  }
+
+  return str_read;
+}
+
+// Listen on the socket and answer back to requests
+void ServerLoop(int listening_socket, sockaddr_in socket_address) {
+  socklen_t socket_address_size = sizeof(socket_address);
+
+  // Listen on the socket (maximum 1 connection)
+  if (listen(listening_socket, 1) == -1) {
+    return;
+  }
+
+  // Keep accepting connections until the thread is terminated
+  // (i.e. server_thread_ is assigned to a new thread or destroyed)
+  for (;;) {
+    // File descriptor to the connection socket
+    // This blocks the thread until a connection is established
+    int accepted_socket =
+        accept(listening_socket, reinterpret_cast<sockaddr*>(&socket_address),
+               reinterpret_cast<socklen_t*>(&socket_address_size));
+    if (accepted_socket == -1) {
+      return;
+    }
+
+    constexpr int kMaxRequestSize = 4096;
+
+    // Read until the end of the headers
+    std::string headers =
+        ReadUntil(accepted_socket, "\r\n\r\n", kMaxRequestSize);
+
+    if (headers == "") {
+      close(accepted_socket);
+      return;
+    }
+
+    // Get the length of the request content
+    ssize_t content_length = GetContentLength(headers);
+    if (content_length > kMaxRequestSize - headers.size() ||
+        content_length < 0) {
+      close(accepted_socket);
+      return;
+    }
+
+    // Read the request content
+    std::string content = ReadExact(accepted_socket, content_length);
+
+    // Prepare a response for the request
+    std::string http_response =
+        "HTTP/1.1 200 OK\nContent-Type: text/plain\nContent-Length: ";
+
+    if (headers.substr(0, 3) == "GET") {
+      http_response += "2\r\n\r\nOK";
+
+    } else if (headers.substr(0, 4) == "POST") {
+      http_response +=
+          std::to_string(content.size()) + "\r\n\r\n" + std::string{content};
+
+    } else {
+      close(accepted_socket);
+      return;
+    }
+
+    // Ignore any errors, the connection will be closed anyway
+    write(accepted_socket, http_response.c_str(), http_response.size());
+
+    // Close the socket
+    close(accepted_socket);
+  }
+}
+
+}  // namespace
+
+void CurlTestUtils::StartMockServer() {
+  // Get the socket file descriptor
+  int listening_socket = socket(AF_INET, SOCK_STREAM, 0);
+
+  // Create the socket address object
+  // The port is set to 0, meaning that it will be auto assigned
+  // Only local connections can access this socket
+  sockaddr_in socket_address{AF_INET, 0, htonl(INADDR_LOOPBACK)};
+  socklen_t socket_address_size = sizeof(socket_address);
+  if (listening_socket == -1) {
+    return;
+  }
+
+  // Bind the file descriptor to the socket address object
+  if (bind(listening_socket, reinterpret_cast<sockaddr*>(&socket_address),
+           socket_address_size) == -1) {
+    return;
+  }
+
+  // Assign an available port to the socket address object
+  if (getsockname(listening_socket,
+                  reinterpret_cast<sockaddr*>(&socket_address),
+                  &socket_address_size) == -1) {
+    return;
+  }
+
+  // Get the port number
+  port_ = ntohs(socket_address.sin_port);
+
+  // Set server_thread_ operation to socket listening
+  server_thread_ = std::thread(ServerLoop, listening_socket, socket_address);
+}

oss-internship-2020/curl/tests/test_utils.h

@@ -0,0 +1,55 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef TESTS_H_
+#define TESTS_H_
+
+#include "../sandbox.h"      // NOLINT(build/include)
+#include "curl_sapi.sapi.h"  // NOLINT(build/include)
+#include "gtest/gtest.h"
+#include "sandboxed_api/util/flag.h"
+#include "sandboxed_api/util/status_matchers.h"
+
+// Helper class that can be used to test Curl Sandboxed
+class CurlTestUtils {
+ protected:
+  // Initialize and set up the curl handle
+  absl::Status CurlTestSetUp();
+  // Clean up the curl handle
+  absl::Status CurlTestTearDown();
+
+  // Perform a request to the mock server, return the response
+  absl::StatusOr<std::string> PerformRequest();
+
+  // Start a mock server (only once) that will manage connections for the tests
+  // The server listens on a port asynchronously by creating a thread
+  // The port number is stored in port_
+  // Responds with "OK" to a GET request
+  // Responds with the POST request fields to a POST request
+  static void StartMockServer();
+
+  std::unique_ptr<CurlSapiSandbox> sandbox_;
+  std::unique_ptr<CurlApi> api_;
+  std::unique_ptr<sapi::v::RemotePtr> curl_;
+
+  static std::thread server_thread_;
+
+  static constexpr absl::string_view kUrl = "http://127.0.0.1/";
+  static int port_;
+
+ private:
+  std::unique_ptr<sapi::v::LenVal> chunk_;
+};
+
+#endif  // TESTS_H_

oss-internship-2020/curl/tests/tests.cc

@@ -0,0 +1,138 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "test_utils.h"  // NOLINT(build/include)
+
+class CurlTest : public CurlTestUtils, public ::testing::Test {
+ protected:
+  void SetUp() override {
+    // Start mock server, get port number and check for any error
+    StartMockServer();
+    ASSERT_TRUE(server_thread_.joinable());
+    ASSERT_TRUE(CurlTestSetUp().ok());
+  }
+
+  void TearDown() override {
+    ASSERT_TRUE(CurlTestTearDown().ok());
+    // Detach the server thread
+    server_thread_.detach();
+  }
+};
+
+TEST_F(CurlTest, EffectiveUrl) {
+  sapi::v::RemotePtr effective_url_ptr(nullptr);
+
+  ASSERT_TRUE(PerformRequest().ok());
+
+  // Get effective URL
+  SAPI_ASSERT_OK_AND_ASSIGN(
+      int getinfo_code,
+      api_->curl_easy_getinfo_ptr(curl_.get(), CURLINFO_EFFECTIVE_URL,
+                                  effective_url_ptr.PtrBoth()));
+  ASSERT_EQ(getinfo_code, CURLE_OK);
+
+  // Store effective URL in a string
+  SAPI_ASSERT_OK_AND_ASSIGN(std::string effective_url,
+                       sandbox_->GetCString(sapi::v::RemotePtr(
+                           effective_url_ptr.GetPointedVar())));
+
+  // Compare effective URL with original URL
+  ASSERT_EQ(effective_url, kUrl);
+}
+
+TEST_F(CurlTest, EffectivePort) {
+  sapi::v::Int effective_port;
+
+  ASSERT_TRUE(PerformRequest().ok());
+
+  // Get effective port
+  SAPI_ASSERT_OK_AND_ASSIGN(int getinfo_code, api_->curl_easy_getinfo_ptr(
+                                             curl_.get(), CURLINFO_PRIMARY_PORT,
+                                             effective_port.PtrBoth()));
+  ASSERT_EQ(getinfo_code, CURLE_OK);
+
+  // Compare effective port with port set by the mock server
+  ASSERT_EQ(effective_port.GetValue(), port_);
+}
+
+TEST_F(CurlTest, ResponseCode) {
+  sapi::v::Int response_code;
+
+  ASSERT_TRUE(PerformRequest().ok());
+
+  // Get response code
+  SAPI_ASSERT_OK_AND_ASSIGN(
+      int getinfo_code,
+      api_->curl_easy_getinfo_ptr(curl_.get(), CURLINFO_RESPONSE_CODE,
+                                  response_code.PtrBoth()));
+  ASSERT_EQ(getinfo_code, CURLE_OK);
+
+  // Check response code
+  ASSERT_EQ(response_code.GetValue(), 200);
+}
+
+TEST_F(CurlTest, ContentType) {
+  sapi::v::RemotePtr content_type_ptr(nullptr);
+
+  ASSERT_TRUE(PerformRequest().ok());
+
+  // Get effective URL
+  SAPI_ASSERT_OK_AND_ASSIGN(int getinfo_code, api_->curl_easy_getinfo_ptr(
+                                             curl_.get(), CURLINFO_CONTENT_TYPE,
+                                             content_type_ptr.PtrBoth()));
+  ASSERT_EQ(getinfo_code, CURLE_OK);
+
+  // Store content type in a string
+  SAPI_ASSERT_OK_AND_ASSIGN(std::string content_type,
+                       sandbox_->GetCString(sapi::v::RemotePtr(
+                           content_type_ptr.GetPointedVar())));
+
+  // Compare content type with "text/plain"
+  ASSERT_EQ(content_type, "text/plain");
+}
+
+TEST_F(CurlTest, GETResponse) {
+  SAPI_ASSERT_OK_AND_ASSIGN(std::string response, PerformRequest());
+
+  // Compare response with expected response
+  ASSERT_EQ(response, "OK");
+}
+
+TEST_F(CurlTest, POSTResponse) {
+  sapi::v::ConstCStr post_fields("postfields");
+
+  // Set request method to POST
+  SAPI_ASSERT_OK_AND_ASSIGN(int setopt_post, api_->curl_easy_setopt_long(
+                                            curl_.get(), CURLOPT_POST, 1l));
+  ASSERT_EQ(setopt_post, CURLE_OK);
+
+  // Set the size of the POST fields
+  SAPI_ASSERT_OK_AND_ASSIGN(
+      int setopt_post_fields_size,
+      api_->curl_easy_setopt_long(curl_.get(), CURLOPT_POSTFIELDSIZE,
+                                  post_fields.GetSize()));
+  ASSERT_EQ(setopt_post_fields_size, CURLE_OK);
+
+  // Set the POST fields
+  SAPI_ASSERT_OK_AND_ASSIGN(
+      int setopt_post_fields,
+      api_->curl_easy_setopt_ptr(curl_.get(), CURLOPT_POSTFIELDS,
+                                 post_fields.PtrBefore()));
+  ASSERT_EQ(setopt_post_fields, CURLE_OK);
+
+  SAPI_ASSERT_OK_AND_ASSIGN(std::string response, PerformRequest());
+
+  // Compare response with expected response
+  ASSERT_EQ(std::string(post_fields.GetData()), response);
+}

oss-internship-2020/guetzli/.bazelrc

@@ -0,0 +1,2 @@
+# Build in C++17 mode without a custom CROSSTOOL
+build --cxxopt=-std=c++17

oss-internship-2020/guetzli/BUILD.bazel

@@ -0,0 +1,83 @@
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+load(
+    "@com_google_sandboxed_api//sandboxed_api/bazel:sapi.bzl",
+    "sapi_library",
+)
+
+licenses(["notice"])
+
+cc_library(
+    name = "guetzli_wrapper",
+    srcs = ["guetzli_entry_points.cc"],
+    hdrs = ["guetzli_entry_points.h"],
+    deps = [
+        "@com_google_sandboxed_api//sandboxed_api:lenval_core",
+        "@com_google_sandboxed_api//sandboxed_api:vars",
+        "@guetzli//:guetzli_lib",
+        "@png_archive//:png",
+    ],
+)
+
+sapi_library(
+    name = "guetzli_sapi",
+    srcs = ["guetzli_transaction.cc"],
+    hdrs = [
+        "guetzli_sandbox.h",
+        "guetzli_transaction.h",
+    ],
+    functions = [
+        "ProcessJpeg",
+        "ProcessRgb",
+        "WriteDataToFd",
+    ],
+    input_files = ["guetzli_entry_points.h"],
+    lib = ":guetzli_wrapper",
+    lib_name = "Guetzli",
+    namespace = "guetzli::sandbox",
+    visibility = ["//visibility:public"],
+)
+
+cc_binary(
+    name = "guetzli_sandboxed",
+    srcs = ["guetzli_sandboxed.cc"],
+    deps = [
+        ":guetzli_sapi",
+    ],
+)
+
+cc_test(
+    name = "transaction_tests",
+    size = "large",
+    srcs = ["guetzli_transaction_test.cc"],
+    data = glob(["testdata/*"]),
+    visibility = ["//visibility:public"],
+    deps = [
+        "//:guetzli_sapi",
+        "@com_google_googletest//:gtest_main",
+    ],
+)
+
+cc_test(
+    name = "sapi_lib_tests",
+    size = "large",
+    srcs = ["guetzli_sapi_test.cc"],
+    data = glob(["testdata/*"]),
+    visibility = ["//visibility:public"],
+    deps = [
+        "//:guetzli_sapi",
+        "@com_google_googletest//:gtest_main",
+    ],
+)

oss-internship-2020/guetzli/README.md

@@ -0,0 +1,32 @@
+# Guetzli Sandbox
+This is an example implementation of a sandbox for the [Guetzli](https://github.com/google/guetzli) library using [Sandboxed API](https://github.com/google/sandboxed-api).
+Please read Guetzli's [documentation](https://github.com/google/guetzli#introduction) to learn more about it.
+
+## Implementation details
+Because Guetzli provides a C++ API and SAPI requires functions to be `extern "C"`, a wrapper library has been written for the compatibility. SAPI provides a Transaction class, which is a convenient way to create a wrapper for your sandboxed API that handles internal errors. The original Guetzli has a command-line utility to encode images, so a fully compatible utility that uses sandboxed Guetzli is provided.
+
+The wrapper around Guetzli uses file descriptors to pass data to the sandbox. This approach restricts the sandbox from using the `open()` syscall and also helps to prevent making copies of data, because you need to synchronize it between processes.
+
+## Build Guetzli Sandboxed
+Right now Sandboxed API support only Linux systems, so you need one to build it. Guetzli sandboxed uses [Bazel](https://bazel.build/) as a build system so you need to [install it](https://docs.bazel.build/versions/3.4.0/install.html) before building.
+
+To build Guetzli sandboxed encoding utility you can use this command:
+`bazel build //:guetzli_sandboxed`
+
+Then you can use it in this way:
+```
+guetzli_sandboxed [--quality Q] [--verbose] original.png output.jpg
+guetzli_sandboxed [--quality Q] [--verbose] original.jpg output.jpg
+```
+Refer to Guetzli's [documentation](https://github.com/google/guetzli#using) to read more about usage.
+
+## Examples
+There are two different sets of unit tests which demonstrate how to use different parts of Guetzli sandboxed:
+* `tests/guetzli_sapi_test.cc` - example usage of Guetzli sandboxed API.
+* `tests/guetzli_transaction_test.cc` - example usage of Guetzli transaction.
+
+To run tests use the following command:
+`bazel test ...`
+
+Also, there is an example of custom security policy for your sandbox in
+`guetzli_sandbox.h`

oss-internship-2020/guetzli/WORKSPACE

@@ -0,0 +1,100 @@
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+workspace(name = "guetzli_sandboxed")
+
+load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+load("@bazel_tools//tools/build_defs/repo:utils.bzl", "maybe")
+
+# Include the Sandboxed API dependency if it does not already exist in this
+# project. This ensures that this workspace plays well with other external
+# dependencies that might use Sandboxed API.
+maybe(
+    git_repository,
+    name = "com_google_sandboxed_api",
+    # This example depends on the latest master. In an embedding project, it
+    # is advisable to pin Sandboxed API to a specific revision instead.
+    # commit = "ba47adc21d4c9bc316f3c7c32b0faaef952c111e",  # 2020-05-15
+    branch = "master",
+    remote = "https://github.com/google/sandboxed-api.git",
+)
+
+# From here on, Sandboxed API files are available. The statements below setup
+# transitive dependencies such as Abseil. Like above, those will only be
+# included if they don't already exist in the project.
+load(
+    "@com_google_sandboxed_api//sandboxed_api/bazel:sapi_deps.bzl",
+    "sapi_deps",
+)
+
+sapi_deps()
+
+# Need to separately setup Protobuf dependencies in order for the build rules
+# to work.
+load("@com_google_protobuf//:protobuf_deps.bzl", "protobuf_deps")
+
+protobuf_deps()
+
+http_archive(
+    name = "guetzli",
+    build_file = "guetzli.BUILD",
+    sha256 = "39632357e49db83d9560bf0de560ad833352f36d23b109b0e995b01a37bddb57",
+    strip_prefix = "guetzli-master",
+    url = "https://github.com/google/guetzli/archive/master.zip",
+)
+
+http_archive(
+    name = "butteraugli",
+    build_file = "butteraugli.BUILD",
+    sha256 = "39632357e49db83d9560bf0de560ad833352f36d23b109b0e995b01a37bddb57",
+    strip_prefix = "guetzli-master/third_party/butteraugli",
+    url = "https://github.com/google/guetzli/archive/master.zip",
+)
+
+http_archive(
+    name = "png_archive",
+    build_file = "png.BUILD",
+    sha256 = "a941dc09ca00148fe7aaf4ecdd6a67579c293678ed1e1cf633b5ffc02f4f8cf7",
+    strip_prefix = "libpng-1.2.57",
+    url = "http://github.com/glennrp/libpng/archive/v1.2.57.zip",
+)
+
+http_archive(
+    name = "jpeg_archive",
+    build_file = "jpeg.BUILD",
+    sha256 = "240fd398da741669bf3c90366f58452ea59041cacc741a489b99f2f6a0bad052",
+    strip_prefix = "jpeg-9b",
+    url = "http://www.ijg.org/files/jpegsrc.v9b.tar.gz",
+)
+
+http_archive(
+    name = "net_zlib",
+    build_file = "zlib.BUILD",
+    sha256 = "c3e5e9fdd5004dcb542feda5ee4f0ff0744628baf8ed2dd5d66f8ca1197cb1a1",  # 2020-04-23
+    strip_prefix = "zlib-1.2.11",
+    urls = [
+        "https://mirror.bazel.build/zlib.net/zlib-1.2.11.tar.gz",
+        "https://www.zlib.net/zlib-1.2.11.tar.gz",
+    ],
+)
+
+# GoogleTest/GoogleMock
+maybe(
+    http_archive,
+    name = "com_google_googletest",
+    sha256 = "a6ab7c7d6fd4dd727f6012b5d85d71a73d3aa1274f529ecd4ad84eb9ec4ff767",  # 2020-04-16
+    strip_prefix = "googletest-dcc92d0ab6c4ce022162a23566d44f673251eee4",
+    urls = ["https://github.com/google/googletest/archive/dcc92d0ab6c4ce022162a23566d44f673251eee4.zip"],
+)

oss-internship-2020/guetzli/external/butteraugli.BUILD

@@ -0,0 +1,28 @@
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+licenses(["notice"])
+
+cc_library(
+    name = "butteraugli",
+    srcs = [
+        "butteraugli/butteraugli.cc",
+        "butteraugli/butteraugli.h",
+    ],
+    hdrs = [
+        "butteraugli/butteraugli.h",
+    ],
+    copts = ["-Wno-sign-compare"],
+    visibility = ["//visibility:public"],
+)

oss-internship-2020/guetzli/external/guetzli.BUILD

@@ -0,0 +1,32 @@
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+licenses(["notice"])
+
+cc_library(
+    name = "guetzli_lib",
+    srcs = glob(
+        [
+            "guetzli/*.h",
+            "guetzli/*.cc",
+            "guetzli/*.inc",
+        ],
+        exclude = ["guetzli/guetzli.cc"],
+    ),
+    copts = [ "-Wno-sign-compare" ],
+    visibility= [ "//visibility:public" ],
+    deps = [
+        "@butteraugli//:butteraugli",
+    ],
+)

oss-internship-2020/guetzli/external/jpeg.BUILD

@@ -0,0 +1,89 @@
+# Description:
+#   The Independent JPEG Group's JPEG runtime library.
+
+licenses(["notice"])  # custom notice-style license, see LICENSE
+
+cc_library(
+    name = "jpeg",
+    srcs = [
+        "cderror.h",
+        "cdjpeg.h",
+        "jaricom.c",
+        "jcapimin.c",
+        "jcapistd.c",
+        "jcarith.c",
+        "jccoefct.c",
+        "jccolor.c",
+        "jcdctmgr.c",
+        "jchuff.c",
+        "jcinit.c",
+        "jcmainct.c",
+        "jcmarker.c",
+        "jcmaster.c",
+        "jcomapi.c",
+        "jconfig.h",
+        "jcparam.c",
+        "jcprepct.c",
+        "jcsample.c",
+        "jctrans.c",
+        "jdapimin.c",
+        "jdapistd.c",
+        "jdarith.c",
+        "jdatadst.c",
+        "jdatasrc.c",
+        "jdcoefct.c",
+        "jdcolor.c",
+        "jdct.h",
+        "jddctmgr.c",
+        "jdhuff.c",
+        "jdinput.c",
+        "jdmainct.c",
+        "jdmarker.c",
+        "jdmaster.c",
+        "jdmerge.c",
+        "jdpostct.c",
+        "jdsample.c",
+        "jdtrans.c",
+        "jerror.c",
+        "jfdctflt.c",
+        "jfdctfst.c",
+        "jfdctint.c",
+        "jidctflt.c",
+        "jidctfst.c",
+        "jidctint.c",
+        "jinclude.h",
+        "jmemmgr.c",
+        "jmemnobs.c",
+        "jmemsys.h",
+        "jmorecfg.h",
+        "jquant1.c",
+        "jquant2.c",
+        "jutils.c",
+        "jversion.h",
+        "transupp.h",
+    ],
+    hdrs = [
+        "jerror.h",
+        "jpegint.h",
+        "jpeglib.h",
+    ],
+    includes = ["."],
+    visibility = ["//visibility:public"],
+)
+
+genrule(
+    name = "configure",
+    outs = ["jconfig.h"],
+    cmd = "cat <<EOF >$@\n" +
+          "#define HAVE_PROTOTYPES 1\n" +
+          "#define HAVE_UNSIGNED_CHAR 1\n" +
+          "#define HAVE_UNSIGNED_SHORT 1\n" +
+          "#define HAVE_STDDEF_H 1\n" +
+          "#define HAVE_STDLIB_H 1\n" +
+          "#ifdef WIN32\n" +
+          "#define INLINE __inline\n" +
+          "#else\n" +
+          "#define INLINE __inline__\n" +
+          "#endif\n" +
+          "EOF\n",
+)

oss-internship-2020/guetzli/external/png.BUILD

@@ -0,0 +1,33 @@
+# Description:
+#   libpng is the official PNG reference library.
+
+licenses(["notice"])  # BSD/MIT-like license
+
+cc_library(
+    name = "png",
+    srcs = [
+        "png.c",
+        "pngerror.c",
+        "pngget.c",
+        "pngmem.c",
+        "pngpread.c",
+        "pngread.c",
+        "pngrio.c",
+        "pngrtran.c",
+        "pngrutil.c",
+        "pngset.c",
+        "pngtrans.c",
+        "pngwio.c",
+        "pngwrite.c",
+        "pngwtran.c",
+        "pngwutil.c",
+    ],
+    hdrs = [
+        "png.h",
+        "pngconf.h",
+    ],
+    includes = ["."],
+    linkopts = ["-lm"],
+    visibility = ["//visibility:public"],
+    deps = ["@net_zlib//:zlib"],
+)

oss-internship-2020/guetzli/external/zlib.BUILD

@@ -0,0 +1,56 @@
+# Copyright 2019 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+licenses(["notice"])
+
+cc_library(
+    name = "zlib",
+    srcs = [
+        "adler32.c",
+        "compress.c",
+        "crc32.c",
+        "deflate.c",
+        "gzclose.c",
+        "gzlib.c",
+        "gzread.c",
+        "gzwrite.c",
+        "infback.c",
+        "inffast.c",
+        "inflate.c",
+        "inflate.h",
+        "inftrees.c",
+        "trees.c",
+        "trees.h",
+        "uncompr.c",
+        "zutil.c",
+    ],
+    hdrs = ["zlib.h"],
+    # Use -Dverbose=-1 to turn off zlib's trace logging. (#3280)
+    copts = [
+        "-w",
+        "-Dverbose=-1",
+    ],
+    includes = ["."],
+    textual_hdrs = [
+        "crc32.h",
+        "deflate.h",
+        "gzguts.h",
+        "inffast.h",
+        "inffixed.h",
+        "inftrees.h",
+        "zconf.h",
+        "zutil.h",
+    ],
+    visibility = ["//visibility:public"],
+)

oss-internship-2020/guetzli/guetzli_entry_points.cc

@@ -0,0 +1,293 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "guetzli_entry_points.h"  // NOLINT(build/include)
+
+#include <sys/stat.h>
+
+#include <algorithm>
+#include <cstdio>
+#include <iostream>
+#include <string>
+#include <vector>
+
+#include "guetzli/jpeg_data_reader.h"
+#include "guetzli/quality.h"
+#include "png.h"  // NOLINT(build/include)
+#include "sandboxed_api/sandbox2/util/fileops.h"
+#include "sandboxed_api/util/statusor.h"
+
+namespace {
+
+constexpr int kBytesPerPixel = 350;
+constexpr int kLowestMemusageMB = 100;
+
+struct GuetzliInitData {
+  std::string in_data;
+  guetzli::Params params;
+  guetzli::ProcessStats stats;
+};
+
+struct ImageData {
+  int xsize;
+  int ysize;
+  std::vector<uint8_t> rgb;
+};
+
+sapi::LenValStruct CreateLenValFromData(const void* data, size_t size) {
+  void* new_data = malloc(size);
+  memcpy(new_data, data, size);
+  return {size, new_data};
+}
+
+sapi::StatusOr<std::string> ReadFromFd(int fd) {
+  struct stat file_data;
+  int status = fstat(fd, &file_data);
+
+  if (status < 0) {
+    return absl::FailedPreconditionError("Error reading input from fd");
+  }
+
+  std::string result;
+  result.resize(file_data.st_size);
+  status = read(fd, result.data(), result.size());
+
+  if (status < 0) {
+    return absl::FailedPreconditionError("Error reading input from fd");
+  }
+
+  return result;
+}
+
+sapi::StatusOr<GuetzliInitData> PrepareDataForProcessing(
+    const ProcessingParams& processing_params) {
+  sapi::StatusOr<std::string> input = ReadFromFd(processing_params.remote_fd);
+
+  if (!input.ok()) {
+    return input.status();
+  }
+
+  guetzli::Params guetzli_params;
+  guetzli_params.butteraugli_target = static_cast<float>(
+      guetzli::ButteraugliScoreForQuality(processing_params.quality));
+
+  guetzli::ProcessStats stats;
+
+  if (processing_params.verbose) {
+    stats.debug_output_file = stderr;
+  }
+
+  return GuetzliInitData{std::move(input.value()), guetzli_params, stats};
+}
+
+inline uint8_t BlendOnBlack(const uint8_t val, const uint8_t alpha) {
+  return (static_cast<int>(val) * static_cast<int>(alpha) + 128) / 255;
+}
+
+// Modified version of ReadPNG from original guetzli.cc
+sapi::StatusOr<ImageData> ReadPNG(const std::string& data) {
+  std::vector<uint8_t> rgb;
+  int xsize, ysize;
+  png_structp png_ptr =
+      png_create_read_struct(PNG_LIBPNG_VER_STRING, nullptr, nullptr, nullptr);
+  if (!png_ptr) {
+    return absl::FailedPreconditionError(
+        "Error reading PNG data from input file");
+  }
+
+  png_infop info_ptr = png_create_info_struct(png_ptr);
+  if (!info_ptr) {
+    png_destroy_read_struct(&png_ptr, nullptr, nullptr);
+    return absl::FailedPreconditionError(
+        "Error reading PNG data from input file");
+  }
+
+  if (setjmp(png_jmpbuf(png_ptr)) != 0) {
+    // Ok we are here because of the setjmp.
+    png_destroy_read_struct(&png_ptr, &info_ptr, nullptr);
+    return absl::FailedPreconditionError(
+        "Error reading PNG data from input file");
+  }
+
+  std::istringstream memstream(data, std::ios::in | std::ios::binary);
+  png_set_read_fn(
+      png_ptr, static_cast<void*>(&memstream),
+      [](png_structp png_ptr, png_bytep outBytes, png_size_t byteCountToRead) {
+        std::istringstream& memstream =
+            *static_cast<std::istringstream*>(png_get_io_ptr(png_ptr));
+
+        memstream.read(reinterpret_cast<char*>(outBytes), byteCountToRead);
+
+        if (memstream.eof()) png_error(png_ptr, "unexpected end of data");
+        if (memstream.fail()) png_error(png_ptr, "read from memory error");
+      });
+
+  // The png_transforms flags are as follows:
+  // packing == convert 1,2,4 bit images,
+  // strip == 16 -> 8 bits / channel,
+  // shift == use sBIT dynamics, and
+  // expand == palettes -> rgb, grayscale -> 8 bit images, tRNS -> alpha.
+  const unsigned int png_transforms =
+      PNG_TRANSFORM_PACKING | PNG_TRANSFORM_EXPAND | PNG_TRANSFORM_STRIP_16;
+
+  png_read_png(png_ptr, info_ptr, png_transforms, nullptr);
+
+  png_bytep* row_pointers = png_get_rows(png_ptr, info_ptr);
+
+  xsize = png_get_image_width(png_ptr, info_ptr);
+  ysize = png_get_image_height(png_ptr, info_ptr);
+  rgb.resize(3 * xsize * ysize);
+
+  const int components = png_get_channels(png_ptr, info_ptr);
+  switch (components) {
+    case 1: {
+      // GRAYSCALE
+      for (int y = 0; y < ysize; ++y) {
+        const uint8_t* row_in = row_pointers[y];
+        uint8_t* row_out = &rgb[3 * y * xsize];
+        for (int x = 0; x < xsize; ++x) {
+          const uint8_t gray = row_in[x];
+          row_out[3 * x + 0] = gray;
+          row_out[3 * x + 1] = gray;
+          row_out[3 * x + 2] = gray;
+        }
+      }
+      break;
+    }
+    case 2: {
+      // GRAYSCALE + ALPHA
+      for (int y = 0; y < ysize; ++y) {
+        const uint8_t* row_in = row_pointers[y];
+        uint8_t* row_out = &rgb[3 * y * xsize];
+        for (int x = 0; x < xsize; ++x) {
+          const uint8_t gray = BlendOnBlack(row_in[2 * x], row_in[2 * x + 1]);
+          row_out[3 * x + 0] = gray;
+          row_out[3 * x + 1] = gray;
+          row_out[3 * x + 2] = gray;
+        }
+      }
+      break;
+    }
+    case 3: {
+      // RGB
+      for (int y = 0; y < ysize; ++y) {
+        const uint8_t* row_in = row_pointers[y];
+        uint8_t* row_out = &rgb[3 * y * xsize];
+        memcpy(row_out, row_in, 3 * xsize);
+      }
+      break;
+    }
+    case 4: {
+      // RGBA
+      for (int y = 0; y < ysize; ++y) {
+        const uint8_t* row_in = row_pointers[y];
+        uint8_t* row_out = &rgb[3 * y * xsize];
+        for (int x = 0; x < xsize; ++x) {
+          const uint8_t alpha = row_in[4 * x + 3];
+          row_out[3 * x + 0] = BlendOnBlack(row_in[4 * x + 0], alpha);
+          row_out[3 * x + 1] = BlendOnBlack(row_in[4 * x + 1], alpha);
+          row_out[3 * x + 2] = BlendOnBlack(row_in[4 * x + 2], alpha);
+        }
+      }
+      break;
+    }
+    default:
+      png_destroy_read_struct(&png_ptr, &info_ptr, nullptr);
+      return absl::FailedPreconditionError(
+          "Error reading PNG data from input file");
+  }
+  png_destroy_read_struct(&png_ptr, &info_ptr, nullptr);
+
+  return ImageData{xsize, ysize, std::move(rgb)};
+}
+
+bool CheckMemoryLimitExceeded(int memlimit_mb, int xsize, int ysize) {
+  double pixels = static_cast<double>(xsize) * ysize;
+  return memlimit_mb != -1 &&
+         (pixels * kBytesPerPixel / (1 << 20) > memlimit_mb ||
+          memlimit_mb < kLowestMemusageMB);
+}
+
+}  // namespace
+
+extern "C" bool ProcessJpeg(const ProcessingParams* processing_params,
+                            sapi::LenValStruct* output) {
+  auto processing_data = PrepareDataForProcessing(*processing_params);
+
+  if (!processing_data.ok()) {
+    std::cerr << processing_data.status().ToString() << std::endl;
+    return false;
+  }
+
+  guetzli::JPEGData jpg_header;
+  if (!guetzli::ReadJpeg(processing_data->in_data, guetzli::JPEG_READ_HEADER,
+                         &jpg_header)) {
+    std::cerr << "Error reading JPG data from input file" << std::endl;
+    return false;
+  }
+
+  if (CheckMemoryLimitExceeded(processing_params->memlimit_mb, jpg_header.width,
+                               jpg_header.height)) {
+    std::cerr << "Memory limit would be exceeded" << std::endl;
+    return false;
+  }
+
+  std::string out_data;
+  if (!guetzli::Process(processing_data->params, &processing_data->stats,
+                        processing_data->in_data, &out_data)) {
+    std::cerr << "Guezli processing failed" << std::endl;
+    return false;
+  }
+
+  *output = CreateLenValFromData(out_data.data(), out_data.size());
+  return true;
+}
+
+extern "C" bool ProcessRgb(const ProcessingParams* processing_params,
+                           sapi::LenValStruct* output) {
+  auto processing_data = PrepareDataForProcessing(*processing_params);
+
+  if (!processing_data.ok()) {
+    std::cerr << processing_data.status().ToString() << std::endl;
+    return false;
+  }
+
+  auto png_data = ReadPNG(processing_data->in_data);
+  if (!png_data.ok()) {
+    std::cerr << "Error reading PNG data from input file" << std::endl;
+    return false;
+  }
+
+  if (CheckMemoryLimitExceeded(processing_params->memlimit_mb, png_data->xsize,
+                               png_data->ysize)) {
+    std::cerr << "Memory limit would be exceeded" << std::endl;
+    return false;
+  }
+
+  std::string out_data;
+  if (!guetzli::Process(processing_data->params, &processing_data->stats,
+                        png_data->rgb, png_data->xsize, png_data->ysize,
+                        &out_data)) {
+    std::cerr << "Guetzli processing failed" << std::endl;
+    return false;
+  }
+
+  *output = CreateLenValFromData(out_data.data(), out_data.size());
+  return true;
+}
+
+extern "C" bool WriteDataToFd(int fd, sapi::LenValStruct* data) {
+  return sandbox2::file_util::fileops::WriteToFD(
+      fd, static_cast<const char*>(data->data), data->size);
+}

oss-internship-2020/guetzli/guetzli_entry_points.h

@@ -0,0 +1,35 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef GUETZLI_SANDBOXED_GUETZLI_ENTRY_POINTS_H_
+#define GUETZLI_SANDBOXED_GUETZLI_ENTRY_POINTS_H_
+
+#include "guetzli/processor.h"
+#include "sandboxed_api/lenval_core.h"
+#include "sandboxed_api/vars.h"
+
+struct ProcessingParams {
+  int remote_fd = -1;
+  int verbose = 0;
+  int quality = 0;
+  int memlimit_mb = 0;
+};
+
+extern "C" bool ProcessJpeg(const ProcessingParams* processing_params,
+                            sapi::LenValStruct* output);
+extern "C" bool ProcessRgb(const ProcessingParams* processing_params,
+                           sapi::LenValStruct* output);
+extern "C" bool WriteDataToFd(int fd, sapi::LenValStruct* data);
+
+#endif  // GUETZLI_SANDBOXED_GUETZLI_ENTRY_POINTS_H_

oss-internship-2020/guetzli/guetzli_sandbox.h

@@ -0,0 +1,45 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef GUETZLI_SANDBOXED_GUETZLI_SANDBOX_H_
+#define GUETZLI_SANDBOXED_GUETZLI_SANDBOX_H_
+
+#include <syscall.h>
+
+#include "guetzli_sapi.sapi.h"  // NOLINT(build/include)
+
+namespace guetzli::sandbox {
+
+class GuetzliSapiSandbox : public GuetzliSandbox {
+ public:
+  std::unique_ptr<sandbox2::Policy> ModifyPolicy(
+      sandbox2::PolicyBuilder*) override {
+    return sandbox2::PolicyBuilder()
+        .AllowStaticStartup()
+        .AllowRead()
+        .AllowSystemMalloc()
+        .AllowWrite()
+        .AllowExit()
+        .AllowStat()
+        .AllowSyscalls({
+            __NR_futex, __NR_close,
+            __NR_recvmsg  // To work with remote fd
+        })
+        .BuildOrDie();
+  }
+};
+
+}  // namespace guetzli::sandbox
+
+#endif  // GUETZLI_SANDBOXED_GUETZLI_SANDBOX_H_

oss-internship-2020/guetzli/guetzli_sandboxed.cc

@@ -0,0 +1,96 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <cstdio>
+#include <iostream>
+
+#include "guetzli_transaction.h"  // NOLINT(build/include)
+#include "sandboxed_api/sandbox2/util/fileops.h"
+#include "sandboxed_api/util/statusor.h"
+
+namespace {
+
+constexpr int kDefaultJPEGQuality = 95;
+constexpr int kDefaultMemlimitMB = 6000;
+
+void Usage() {
+  fprintf(stderr,
+          "Guetzli JPEG compressor. Usage: \n"
+          "guetzli [flags] input_filename output_filename\n"
+          "\n"
+          "Flags:\n"
+          "  --verbose    - Print a verbose trace of all attempts to standard "
+          "output.\n"
+          "  --quality Q  - Visual quality to aim for, expressed as a JPEG "
+          "quality value.\n"
+          "                 Default value is %d.\n"
+          "  --memlimit M - Memory limit in MB. Guetzli will fail if unable to "
+          "stay under\n"
+          "                 the limit. Default limit is %d MB.\n"
+          "  --nomemlimit - Do not limit memory usage.\n",
+          kDefaultJPEGQuality, kDefaultMemlimitMB);
+  exit(1);
+}
+
+}  // namespace
+
+int main(int argc, const char** argv) {
+  int verbose = 0;
+  int quality = kDefaultJPEGQuality;
+  int memlimit_mb = kDefaultMemlimitMB;
+
+  int opt_idx = 1;
+  for (; opt_idx < argc; opt_idx++) {
+    if (strnlen(argv[opt_idx], 2) < 2 || argv[opt_idx][0] != '-' ||
+        argv[opt_idx][1] != '-')
+      break;
+
+    if (!strcmp(argv[opt_idx], "--verbose")) {
+      verbose = 1;
+    } else if (!strcmp(argv[opt_idx], "--quality")) {
+      opt_idx++;
+      if (opt_idx >= argc) Usage();
+      quality = atoi(argv[opt_idx]);  // NOLINT(runtime/deprecated_fn)
+    } else if (!strcmp(argv[opt_idx], "--memlimit")) {
+      opt_idx++;
+      if (opt_idx >= argc) Usage();
+      memlimit_mb = atoi(argv[opt_idx]);  // NOLINT(runtime/deprecated_fn)
+    } else if (!strcmp(argv[opt_idx], "--nomemlimit")) {
+      memlimit_mb = -1;
+    } else if (!strcmp(argv[opt_idx], "--")) {
+      opt_idx++;
+      break;
+    } else {
+      fprintf(stderr, "Unknown commandline flag: %s\n", argv[opt_idx]);
+      Usage();
+    }
+  }
+
+  if (argc - opt_idx != 2) {
+    Usage();
+  }
+
+  guetzli::sandbox::TransactionParams params = {
+      argv[opt_idx], argv[opt_idx + 1], verbose, quality, memlimit_mb};
+
+  guetzli::sandbox::GuetzliTransaction transaction(std::move(params));
+  auto result = transaction.Run();
+
+  if (!result.ok()) {
+    std::cerr << result.ToString() << std::endl;
+    return EXIT_FAILURE;
+  }
+
+  return EXIT_SUCCESS;
+}

oss-internship-2020/guetzli/guetzli_sapi_test.cc

@@ -0,0 +1,124 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <syscall.h>
+
+#include <algorithm>
+#include <fstream>
+#include <memory>
+#include <sstream>
+
+#include "guetzli_sandbox.h"  // NOLINT(build/include)
+#include "gtest/gtest.h"
+#include "sandboxed_api/sandbox2/util/fileops.h"
+#include "sandboxed_api/vars.h"
+
+namespace guetzli::sandbox::tests {
+
+namespace {
+
+constexpr absl::string_view kInPngFilename = "bees.png";
+constexpr absl::string_view kInJpegFilename = "nature.jpg";
+constexpr absl::string_view kPngReferenceFilename = "bees_reference.jpg";
+constexpr absl::string_view kJpegReferenceFIlename = "nature_reference.jpg";
+
+constexpr int kDefaultQualityTarget = 95;
+constexpr int kDefaultMemlimitMb = 6000;
+
+constexpr absl::string_view kRelativePathToTestdata =
+    "/guetzli_sandboxed/testdata/";
+
+std::string GetPathToInputFile(absl::string_view filename) {
+  return absl::StrCat(getenv("TEST_SRCDIR"), kRelativePathToTestdata, filename);
+}
+
+std::string ReadFromFile(const std::string& filename) {
+  std::ifstream stream(filename, std::ios::binary);
+
+  if (!stream.is_open()) {
+    return "";
+  }
+
+  std::stringstream result;
+  result << stream.rdbuf();
+  return result.str();
+}
+
+}  // namespace
+
+class GuetzliSapiTest : public ::testing::Test {
+ protected:
+  void SetUp() override {
+    sandbox_ = std::make_unique<GuetzliSapiSandbox>();
+    ASSERT_EQ(sandbox_->Init(), absl::OkStatus());
+    api_ = std::make_unique<GuetzliApi>(sandbox_.get());
+  }
+
+  std::unique_ptr<GuetzliSapiSandbox> sandbox_;
+  std::unique_ptr<GuetzliApi> api_;
+};
+
+// This test can take up to few minutes depending on your hardware
+TEST_F(GuetzliSapiTest, ProcessRGB) {
+  sapi::v::Fd in_fd(open(GetPathToInputFile(kInPngFilename).c_str(), O_RDONLY));
+  ASSERT_TRUE(in_fd.GetValue() != -1) << "Error opening input file";
+  ASSERT_EQ(api_->sandbox()->TransferToSandboxee(&in_fd), absl::OkStatus())
+      << "Error transfering fd to sandbox";
+  ASSERT_TRUE(in_fd.GetRemoteFd() != -1) << "Error opening remote fd";
+  sapi::v::Struct<ProcessingParams> processing_params;
+  *processing_params.mutable_data() = {
+      in_fd.GetRemoteFd(), 0, kDefaultQualityTarget, kDefaultMemlimitMb};
+  sapi::v::LenVal output(0);
+  sapi::StatusOr<bool> processing_result =
+      api_->ProcessRgb(processing_params.PtrBefore(), output.PtrBoth());
+  ASSERT_TRUE(processing_result.value_or(false)) << "Error processing rgb data";
+  std::string reference_data =
+      ReadFromFile(GetPathToInputFile(kPngReferenceFilename));
+  ASSERT_EQ(output.GetDataSize(), reference_data.size())
+      << "Incorrect result data size";
+  ASSERT_EQ(
+      std::string(output.GetData(), output.GetData() + output.GetDataSize()),
+      reference_data)
+      << "Processed data doesn't match reference output";
+}
+
+// This test can take up to few minutes depending on your hardware
+TEST_F(GuetzliSapiTest, ProcessJpeg) {
+  sapi::v::Fd in_fd(
+      open(GetPathToInputFile(kInJpegFilename).c_str(), O_RDONLY));
+  ASSERT_TRUE(in_fd.GetValue() != -1) << "Error opening input file";
+  ASSERT_EQ(api_->sandbox()->TransferToSandboxee(&in_fd), absl::OkStatus())
+      << "Error transfering fd to sandbox";
+  ASSERT_TRUE(in_fd.GetRemoteFd() != -1) << "Error opening remote fd";
+  sapi::v::Struct<ProcessingParams> processing_params;
+  *processing_params.mutable_data() = {
+      in_fd.GetRemoteFd(), 0, kDefaultQualityTarget, kDefaultMemlimitMb};
+  sapi::v::LenVal output(0);
+  sapi::StatusOr<bool> processing_result =
+      api_->ProcessJpeg(processing_params.PtrBefore(), output.PtrBoth());
+  ASSERT_TRUE(processing_result.value_or(false)) << "Error processing jpg data";
+  std::string reference_data =
+      ReadFromFile(GetPathToInputFile(kJpegReferenceFIlename));
+  ASSERT_EQ(output.GetDataSize(), reference_data.size())
+      << "Incorrect result data size";
+  ASSERT_EQ(
+      std::string(output.GetData(), output.GetData() + output.GetDataSize()),
+      reference_data)
+      << "Processed data doesn't match reference output";
+}
+
+}  // namespace guetzli::sandbox::tests

oss-internship-2020/guetzli/guetzli_transaction.cc

@@ -0,0 +1,123 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "guetzli_transaction.h"  // NOLINT(build/include)
+
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <iostream>
+#include <memory>
+
+namespace guetzli::sandbox {
+
+absl::Status GuetzliTransaction::Main() {
+  sapi::v::Fd in_fd(open(params_.in_file, O_RDONLY));
+
+  if (in_fd.GetValue() < 0) {
+    return absl::FailedPreconditionError("Error opening input file");
+  }
+
+  SAPI_ASSIGN_OR_RETURN(image_type_, GetImageTypeFromFd(in_fd.GetValue()));
+  SAPI_RETURN_IF_ERROR(sandbox()->TransferToSandboxee(&in_fd));
+
+  if (in_fd.GetRemoteFd() < 0) {
+    return absl::FailedPreconditionError(
+        "Error receiving remote FD: remote input fd is set to -1");
+  }
+
+  GuetzliApi api(sandbox());
+  sapi::v::LenVal output(0);
+
+  sapi::v::Struct<ProcessingParams> processing_params;
+  *processing_params.mutable_data() = {in_fd.GetRemoteFd(), params_.verbose,
+                                       params_.quality, params_.memlimit_mb};
+
+  auto result =
+      image_type_ == ImageType::kJpeg
+          ? api.ProcessJpeg(processing_params.PtrBefore(), output.PtrBefore())
+          : api.ProcessRgb(processing_params.PtrBefore(), output.PtrBefore());
+
+  if (!result.value_or(false)) {
+    return absl::FailedPreconditionError(absl::StrCat(
+        "Error processing ", (image_type_ == ImageType::kJpeg ? "jpeg" : "rgb"),
+        " data"));
+  }
+
+  sapi::v::Fd out_fd(open(".", O_TMPFILE | O_RDWR, S_IRUSR | S_IWUSR));
+  if (out_fd.GetValue() < 0) {
+    return absl::FailedPreconditionError("Error creating temp output file");
+  }
+
+  SAPI_RETURN_IF_ERROR(sandbox()->TransferToSandboxee(&out_fd));
+
+  if (out_fd.GetRemoteFd() < 0) {
+    return absl::FailedPreconditionError(
+        "Error receiving remote FD: remote output fd is set to -1");
+  }
+
+  auto write_result = api.WriteDataToFd(out_fd.GetRemoteFd(), output.PtrNone());
+
+  if (!write_result.value_or(false)) {
+    return absl::FailedPreconditionError("Error writing file inside sandbox");
+  }
+
+  SAPI_RETURN_IF_ERROR(LinkOutFile(out_fd.GetValue()));
+
+  return absl::OkStatus();
+}
+
+absl::Status GuetzliTransaction::LinkOutFile(int out_fd) const {
+  if (access(params_.out_file, F_OK) != -1) {
+    if (remove(params_.out_file) < 0) {
+      return absl::FailedPreconditionError(absl::StrCat(
+          "Error deleting existing output file: ", params_.out_file));
+    }
+  }
+
+  std::string path = absl::StrCat("/proc/self/fd/", out_fd);
+
+  if (linkat(AT_FDCWD, path.c_str(), AT_FDCWD, params_.out_file,
+             AT_SYMLINK_FOLLOW) < 0) {
+    return absl::FailedPreconditionError(
+        absl::StrCat("Error linking: ", params_.out_file));
+  }
+
+  return absl::OkStatus();
+}
+
+sapi::StatusOr<ImageType> GuetzliTransaction::GetImageTypeFromFd(int fd) const {
+  static const unsigned char kPNGMagicBytes[] = {
+      0x89, 'P', 'N', 'G', '\r', '\n', 0x1a, '\n',
+  };
+  char read_buf[sizeof(kPNGMagicBytes)];
+
+  if (read(fd, read_buf, sizeof(kPNGMagicBytes)) != sizeof(kPNGMagicBytes)) {
+    return absl::FailedPreconditionError(
+        "Error determining type of the input file");
+  }
+
+  if (lseek(fd, 0, SEEK_SET) != 0) {
+    return absl::FailedPreconditionError(
+        "Error returnig cursor to the beginning");
+  }
+
+  return memcmp(read_buf, kPNGMagicBytes, sizeof(kPNGMagicBytes)) == 0
+             ? ImageType::kPng
+             : ImageType::kJpeg;
+}
+
+}  // namespace guetzli::sandbox

oss-internship-2020/guetzli/guetzli_transaction.h

@@ -0,0 +1,59 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef GUETZLI_SANDBOXED_GUETZLI_TRANSACTION_H_
+#define GUETZLI_SANDBOXED_GUETZLI_TRANSACTION_H_
+
+#include <syscall.h>
+
+#include "guetzli_sandbox.h"  // NOLINT(build/include)
+#include "sandboxed_api/transaction.h"
+#include "sandboxed_api/vars.h"
+
+namespace guetzli::sandbox {
+
+enum class ImageType { kJpeg, kPng };
+
+struct TransactionParams {
+  const char* in_file = nullptr;
+  const char* out_file = nullptr;
+  int verbose = 0;
+  int quality = 0;
+  int memlimit_mb = 0;
+};
+
+// Instance of this transaction shouldn't be reused
+// Create a new one for each processing operation
+class GuetzliTransaction : public sapi::Transaction {
+ public:
+  explicit GuetzliTransaction(TransactionParams params, int retry_count = 0)
+      : sapi::Transaction(std::make_unique<GuetzliSapiSandbox>()),
+        params_(std::move(params)) {
+    set_retry_count(retry_count);
+    SetTimeLimit(absl::InfiniteDuration());
+  }
+
+ private:
+  absl::Status Main() final;
+
+  absl::Status LinkOutFile(int out_fd) const;
+  sapi::StatusOr<ImageType> GetImageTypeFromFd(int fd) const;
+
+  const TransactionParams params_;
+  ImageType image_type_ = ImageType::kJpeg;
+};
+
+}  // namespace guetzli::sandbox
+
+#endif  // GUETZLI_SANDBOXED_GUETZLI_TRANSACTION_H_

oss-internship-2020/guetzli/guetzli_transaction_test.cc

@@ -0,0 +1,145 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "guetzli_transaction.h"  // NOLINT(build/include)
+
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <fstream>
+#include <memory>
+#include <sstream>
+
+#include "gtest/gtest.h"
+#include "sandboxed_api/sandbox2/util/fileops.h"
+
+namespace guetzli::sandbox::tests {
+
+namespace {
+
+constexpr absl::string_view kInPngFilename = "bees.png";
+constexpr absl::string_view kInJpegFilename = "nature.jpg";
+constexpr absl::string_view kOutJpegFilename = "out_jpeg.jpg";
+constexpr absl::string_view kOutPngFilename = "out_png.png";
+constexpr absl::string_view kPngReferenceFilename = "bees_reference.jpg";
+constexpr absl::string_view kJpegReferenceFIlename = "nature_reference.jpg";
+
+constexpr int kPngExpectedSize = 38'625;
+constexpr int kJpegExpectedSize = 10'816;
+
+constexpr int kDefaultQualityTarget = 95;
+constexpr int kDefaultMemlimitMb = 6000;
+
+constexpr absl::string_view kRelativePathToTestdata =
+    "/guetzli_sandboxed/testdata/";
+
+std::string GetPathToFile(absl::string_view filename) {
+  return absl::StrCat(getenv("TEST_SRCDIR"), kRelativePathToTestdata, filename);
+}
+
+std::string ReadFromFile(const std::string& filename) {
+  std::ifstream stream(filename, std::ios::binary);
+
+  if (!stream.is_open()) {
+    return "";
+  }
+
+  std::stringstream result;
+  result << stream.rdbuf();
+  return result.str();
+}
+
+// Helper class to delete file after opening
+class FileRemover {
+ public:
+  explicit FileRemover(const char* path)
+      : path_(path), fd_(open(path, O_RDONLY)) {}
+
+  ~FileRemover() {
+    close(fd_);
+    remove(path_);
+  }
+
+  int get() const { return fd_; }
+
+ private:
+  const char* path_;
+  int fd_;
+};
+
+}  // namespace
+
+TEST(GuetzliTransactionTest, TestTransactionJpg) {
+  std::string in_path = GetPathToFile(kInJpegFilename);
+  std::string out_path = GetPathToFile(kOutJpegFilename);
+
+  TransactionParams params = {in_path.c_str(), out_path.c_str(), 0,
+                              kDefaultQualityTarget, kDefaultMemlimitMb};
+  {
+    GuetzliTransaction transaction(std::move(params));
+    absl::Status result = transaction.Run();
+
+    ASSERT_TRUE(result.ok()) << result.ToString();
+  }
+  std::string reference_data =
+      ReadFromFile(GetPathToFile(kJpegReferenceFIlename));
+  FileRemover file_remover(out_path.c_str());
+  ASSERT_TRUE(file_remover.get() != -1) << "Error opening output file";
+  off_t output_size = lseek(file_remover.get(), 0, SEEK_END);
+  ASSERT_EQ(reference_data.size(), output_size)
+      << "Different sizes of reference and returned data";
+  ASSERT_EQ(lseek(file_remover.get(), 0, SEEK_SET), 0)
+      << "Error repositioning out file";
+
+  std::string output;
+  output.resize(output_size);
+  ssize_t status = read(file_remover.get(), output.data(), output_size);
+  ASSERT_EQ(status, output_size) << "Error reading data from temp output file";
+
+  ASSERT_EQ(output, reference_data) << "Returned data doesn't match reference";
+}
+
+TEST(GuetzliTransactionTest, TestTransactionPng) {
+  std::string in_path = GetPathToFile(kInPngFilename);
+  std::string out_path = GetPathToFile(kOutPngFilename);
+
+  TransactionParams params = {in_path.c_str(), out_path.c_str(), 0,
+                              kDefaultQualityTarget, kDefaultMemlimitMb};
+  {
+    GuetzliTransaction transaction(std::move(params));
+    absl::Status result = transaction.Run();
+
+    ASSERT_TRUE(result.ok()) << result.ToString();
+  }
+  std::string reference_data =
+      ReadFromFile(GetPathToFile(kPngReferenceFilename));
+  FileRemover file_remover(out_path.c_str());
+  ASSERT_TRUE(file_remover.get() != -1) << "Error opening output file";
+  off_t output_size = lseek(file_remover.get(), 0, SEEK_END);
+  ASSERT_EQ(reference_data.size(), output_size)
+      << "Different sizes of reference and returned data";
+  ASSERT_EQ(lseek(file_remover.get(), 0, SEEK_SET), 0)
+      << "Error repositioning out file";
+
+  std::string output;
+  output.resize(output_size);
+  ssize_t status = read(file_remover.get(), output.data(), output_size);
+  ASSERT_EQ(status, output_size) << "Error reading data from temp output file";
+
+  ASSERT_EQ(output, reference_data) << "Returned data doesn't match refernce";
+}
+
+}  // namespace guetzli::sandbox::tests

oss-internship-2020/openjpeg/.gitignore

@@ -0,0 +1 @@
+build/

oss-internship-2020/openjpeg/CMakeLists.txt

@@ -0,0 +1,56 @@
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http:#www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+cmake_minimum_required(VERSION 3.10)
+
+project(openjpeg-sapi C CXX)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED True)
+
+# To override lib option -- else SAPI won't work
+set(BUILD_SHARED_LIBS OFF CACHE BOOL "Build OpenJPEG shared library and link executables against it." FORCE)
+add_subdirectory(openjpeg)
+
+set(SAPI_ROOT "../.." CACHE PATH "Path to the Sandboxed API source tree")
+set(SAPI_ENABLE_EXAMPLES OFF CACHE BOOL "")
+set(SAPI_ENABLE_TESTS OFF CACHE BOOL "")
+set(EXECUTABLE_OUTPUT_PATH "" CACHE PATH "" FORCE)
+add_subdirectory("${SAPI_ROOT}"
+                 "${CMAKE_BINARY_DIR}/sandboxed-api-build"
+                 EXCLUDE_FROM_ALL)
+
+add_sapi_library(openjp2_sapi
+  FUNCTIONS opj_stream_destroy
+            opj_stream_create_default_file_stream
+            opj_create_decompress
+            opj_image_destroy
+            opj_setup_decoder
+            opj_destroy_codec
+            opj_read_header
+            opj_decode
+            opj_set_default_decoder_parameters
+            opj_end_decompress
+
+  INPUTS ${CMAKE_CURRENT_SOURCE_DIR}/openjpeg/src/lib/openjp2/openjpeg.h
+  LIBRARY openjp2
+  LIBRARY_NAME Openjp2
+  NAMESPACE ""
+)
+
+target_include_directories(openjp2_sapi INTERFACE
+  "${PROJECT_BINARY_DIR}"
+)
+
+add_subdirectory(examples)

oss-internship-2020/openjpeg/README.md

@@ -0,0 +1,29 @@
+# OpenJPEG Sandboxed API
+
+This library provides sandboxed version of the [OpenJPEG](https://github.com/uclouvain/openjpeg) library.
+
+## Examples
+
+The examples are sandboxed and simplified version of the main tools provided by the OpenJPEG library, namely (for now) `opj_decompress` from [here](https://github.com/uclouvain/openjpeg/blob/master/src/bin/jp2/opj_decompress.c).
+
+In `decompress_example.cc` the library's sandboxed API is used to convert the _.jp2_ to _.pnm_ image format.
+
+## Build
+
+To build this example, after cloning the whole Sandbox API project, you also need to run
+
+```
+git submodule update --init --recursive
+```
+anywhere in the project tree in order to clone the `openjpeg` submodule.
+Then in the `sandboxed-api/oss-internship-2020/openjpeg` run
+```
+mkdir build && cd build
+cmake -G Ninja
+ninja
+```
+To run `decompress_sandboxed`:
+```
+cd examples
+./decompress_sandboxed absolute/path/to/the/file.jp2 absolute/path/to/the/file.pnm
+```

oss-internship-2020/openjpeg/examples/CMakeLists.txt

@@ -0,0 +1,48 @@
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http:#www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# we need to use modified versions of some of the library tools
+
+file(MAKE_DIRECTORY "${PROJECT_BINARY_DIR}/gen_files")
+file(COPY "${PROJECT_SOURCE_DIR}/openjpeg/src/bin/jp2/convert.c" DESTINATION "${PROJECT_BINARY_DIR}/gen_files/")
+file(COPY "${PROJECT_SOURCE_DIR}/openjpeg/src/bin/jp2/convert.h" DESTINATION "${PROJECT_BINARY_DIR}/gen_files/")
+file(COPY "${PROJECT_SOURCE_DIR}/examples/convert.patch" DESTINATION "${PROJECT_BINARY_DIR}/gen_files/")
+file(COPY "${PROJECT_SOURCE_DIR}/examples/convert_h.patch" DESTINATION "${PROJECT_BINARY_DIR}/gen_files/")
+
+add_custom_command(
+  OUTPUT ${PROJECT_BINARY_DIR}/gen_files/convert.cc ${PROJECT_BINARY_DIR}/gen_files/convert.h
+  COMMAND cd ${PROJECT_BINARY_DIR}/gen_files && patch < ${PROJECT_SOURCE_DIR}/examples/convert.patch > /dev/null
+  COMMAND cd ${PROJECT_BINARY_DIR}/gen_files && patch < ${PROJECT_SOURCE_DIR}/examples/convert_h.patch > /dev/null
+  COMMAND mv ${PROJECT_BINARY_DIR}/gen_files/convert.c ${PROJECT_BINARY_DIR}/gen_files/convert.cc
+)
+
+add_library(convert_helper STATIC
+  ${PROJECT_BINARY_DIR}/gen_files/convert.cc
+  ${PROJECT_BINARY_DIR}/gen_files/convert.h
+)
+
+add_executable(decompress_sandboxed
+  decompress_example.cc
+)
+
+target_link_libraries(decompress_sandboxed PRIVATE
+  convert_helper
+  openjp2_sapi
+  sapi::sapi
+)
+
+target_link_libraries(convert_helper PRIVATE
+  openjp2_sapi
+  sapi::sapi
+)

oss-internship-2020/openjpeg/examples/convert_h.patch

@@ -0,0 +1,135 @@
+--- convert.h	2020-08-27 15:46:45.028628305 +0000
++++ convert_helper.h	2020-08-27 14:26:02.155455250 +0000
+@@ -1,126 +1,8 @@
+-/*
+- * The copyright in this software is being made available under the 2-clauses
+- * BSD License, included below. This software may be subject to other third
+- * party and contributor rights, including patent rights, and no such rights
+- * are granted under this license.
+- *
+- * Copyright (c) 2002-2014, Universite catholique de Louvain (UCL), Belgium
+- * Copyright (c) 2002-2014, Professor Benoit Macq
+- * Copyright (c) 2001-2003, David Janssens
+- * Copyright (c) 2002-2003, Yannick Verschueren
+- * Copyright (c) 2003-2007, Francois-Olivier Devaux
+- * Copyright (c) 2003-2014, Antonin Descampe
+- * Copyright (c) 2005, Herve Drolon, FreeImage Team
+- * All rights reserved.
+- *
+- * Redistribution and use in source and binary forms, with or without
+- * modification, are permitted provided that the following conditions
+- * are met:
+- * 1. Redistributions of source code must retain the above copyright
+- *    notice, this list of conditions and the following disclaimer.
+- * 2. Redistributions in binary form must reproduce the above copyright
+- *    notice, this list of conditions and the following disclaimer in the
+- *    documentation and/or other materials provided with the distribution.
+- *
+- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
+- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+- * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+- * POSSIBILITY OF SUCH DAMAGE.
+- */
+-#ifndef __J2K_CONVERT_H
+-#define __J2K_CONVERT_H
++// imagetopnm and the two functions it calls internaly are patched
++// versions of the library's tools; from openjpeg/src/bin/jp2/convert.c
+ 
+-/**@name RAW component encoding parameters */
+-/*@{*/
+-typedef struct raw_comp_cparameters {
+-    /** subsampling in X direction */
+-    int dx;
+-    /** subsampling in Y direction */
+-    int dy;
+-    /*@}*/
+-} raw_comp_cparameters_t;
+-
+-/**@name RAW image encoding parameters */
+-/*@{*/
+-typedef struct raw_cparameters {
+-    /** width of the raw image */
+-    int rawWidth;
+-    /** height of the raw image */
+-    int rawHeight;
+-    /** number of components of the raw image */
+-    int rawComp;
+-    /** bit depth of the raw image */
+-    int rawBitDepth;
+-    /** signed/unsigned raw image */
+-    OPJ_BOOL rawSigned;
+-    /** raw components parameters */
+-    raw_comp_cparameters_t *rawComps;
+-    /*@}*/
+-} raw_cparameters_t;
+-
+-/* Component precision clipping */
+-void clip_component(opj_image_comp_t* component, OPJ_UINT32 precision);
+-/* Component precision scaling */
+-void scale_component(opj_image_comp_t* component, OPJ_UINT32 precision);
+-
+-/* planar / interleaved conversions */
+-typedef void (* convert_32s_CXPX)(const OPJ_INT32* pSrc, OPJ_INT32* const* pDst,
+-                                  OPJ_SIZE_T length);
+-extern const convert_32s_CXPX convert_32s_CXPX_LUT[5];
+-typedef void (* convert_32s_PXCX)(OPJ_INT32 const* const* pSrc, OPJ_INT32* pDst,
+-                                  OPJ_SIZE_T length, OPJ_INT32 adjust);
+-extern const convert_32s_PXCX convert_32s_PXCX_LUT[5];
+-/* bit depth conversions */
+-typedef void (* convert_XXx32s_C1R)(const OPJ_BYTE* pSrc, OPJ_INT32* pDst,
+-                                    OPJ_SIZE_T length);
+-extern const convert_XXx32s_C1R convert_XXu32s_C1R_LUT[9]; /* up to 8bpp */
+-typedef void (* convert_32sXXx_C1R)(const OPJ_INT32* pSrc, OPJ_BYTE* pDst,
+-                                    OPJ_SIZE_T length);
+-extern const convert_32sXXx_C1R convert_32sXXu_C1R_LUT[9]; /* up to 8bpp */
+-
+-
+-/* TGA conversion */
+-opj_image_t* tgatoimage(const char *filename, opj_cparameters_t *parameters);
+-int imagetotga(opj_image_t * image, const char *outfile);
+-
+-/* BMP conversion */
+-opj_image_t* bmptoimage(const char *filename, opj_cparameters_t *parameters);
+-int imagetobmp(opj_image_t *image, const char *outfile);
+-
+-/* TIFF conversion*/
+-opj_image_t* tiftoimage(const char *filename, opj_cparameters_t *parameters);
+-int imagetotif(opj_image_t *image, const char *outfile);
+-/**
+-Load a single image component encoded in PGX file format
+-@param filename Name of the PGX file to load
+-@param parameters *List ?*
+-@return Returns a greyscale image if successful, returns NULL otherwise
+-*/
+-opj_image_t* pgxtoimage(const char *filename, opj_cparameters_t *parameters);
+-int imagetopgx(opj_image_t *image, const char *outfile);
+-
+-opj_image_t* pnmtoimage(const char *filename, opj_cparameters_t *parameters);
+-int imagetopnm(opj_image_t *image, const char *outfile, int force_split);
+-
+-/* RAW conversion */
+-int imagetoraw(opj_image_t * image, const char *outfile);
+-int imagetorawl(opj_image_t * image, const char *outfile);
+-opj_image_t* rawtoimage(const char *filename, opj_cparameters_t *parameters,
+-                        raw_cparameters_t *raw_cp);
+-opj_image_t* rawltoimage(const char *filename, opj_cparameters_t *parameters,
+-                         raw_cparameters_t *raw_cp);
+-
+-/* PNG conversion*/
+-extern int imagetopng(opj_image_t *image, const char *write_idf);
+-extern opj_image_t* pngtoimage(const char *filename,
+-                               opj_cparameters_t *parameters);
+-
+-#endif /* __J2K_CONVERT_H */
++#include "openjp2_sapi.sapi.h"
+ 
++const char* opj_version(void);
++static int are_comps_similar(opj_image_t* image);
++int imagetopnm(opj_image_t* image, const char* outfile, int force_split);

oss-internship-2020/openjpeg/examples/decompress_example.cc

@@ -0,0 +1,157 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Perform decompression from *.jp2 to *.pnm format
+
+#include <libgen.h>
+#include <syscall.h>
+
+#include <cstdlib>
+#include <iostream>
+#include <vector>
+
+#include "gen_files/convert.h"  // NOLINT(build/include)
+#include "openjp2_sapi.sapi.h"  // NOLINT(build/include)
+
+class Openjp2SapiSandbox : public Openjp2Sandbox {
+ public:
+  explicit Openjp2SapiSandbox(std::string in_file)
+      : in_file_(std::move(in_file)) {}
+
+  std::unique_ptr<sandbox2::Policy> ModifyPolicy(
+      sandbox2::PolicyBuilder*) override {
+    return sandbox2::PolicyBuilder()
+        .AllowStaticStartup()
+        .AllowOpen()
+        .AllowRead()
+        .AllowWrite()
+        .AllowStat()
+        .AllowSystemMalloc()
+        .AllowExit()
+        .AllowSyscalls({
+            __NR_futex,
+            __NR_close,
+            __NR_lseek,
+        })
+        .AddFile(in_file_)
+        .BuildOrDie();
+  }
+
+ private:
+  std::string in_file_;
+};
+
+int main(int argc, char* argv[]) {
+  gflags::ParseCommandLineFlags(&argc, &argv, true);
+  google::InitGoogleLogging(argv[0]);
+
+  if (argc != 3) {
+    std::cerr << "Usage: " << basename(argv[0]) << " absolute/path/to/INPUT.jp2"
+              << " absolute/path/to/OUTPUT.pnm\n";
+    return EXIT_FAILURE;
+  }
+
+  std::string in_file(argv[1]);
+
+  // Initialize sandbox.
+  Openjp2SapiSandbox sandbox(in_file);
+  absl::Status status = sandbox.Init();
+  CHECK(status.ok()) << "Sandbox initialization failed " << status;
+
+  Openjp2Api api(&sandbox);
+  sapi::v::ConstCStr in_file_v(in_file.c_str());
+
+  // Initialize library's main data-holders.
+  sapi::StatusOr<opj_stream_t*> stream =
+      api.opj_stream_create_default_file_stream(in_file_v.PtrBefore(), 1);
+  CHECK(stream.ok()) << "Stream initialization failed: " << stream.status();
+  sapi::v::RemotePtr stream_pointer(stream.value());
+
+  sapi::StatusOr<opj_codec_t*> codec = api.opj_create_decompress(OPJ_CODEC_JP2);
+  CHECK(codec.ok()) << "Codec initialization failed: " << stream.status();
+  sapi::v::RemotePtr codec_pointer(codec.value());
+
+  sapi::v::Struct<opj_dparameters_t> parameters;
+  status = api.opj_set_default_decoder_parameters(parameters.PtrBoth());
+  CHECK(status.ok()) << "Parameters initialization failed " << status;
+
+  sapi::StatusOr<OPJ_BOOL> bool_status =
+      api.opj_setup_decoder(&codec_pointer, parameters.PtrBefore());
+  CHECK(bool_status.ok() && bool_status.value()) << "Decoder setup failed";
+
+  // Start reading image from the input file.
+  sapi::v::GenericPtr image_pointer;
+  bool_status = api.opj_read_header(&stream_pointer, &codec_pointer,
+                                    image_pointer.PtrAfter());
+  CHECK(bool_status.ok() && bool_status.value())
+      << "Reading image header failed";
+
+  sapi::v::Struct<opj_image_t> image;
+  image.SetRemote(reinterpret_cast<void*>(image_pointer.GetValue()));
+  CHECK(sandbox.TransferFromSandboxee(&image).ok())
+      << "Transfer from sandboxee failed";
+
+  bool_status =
+      api.opj_decode(&codec_pointer, &stream_pointer, image.PtrAfter());
+  CHECK(bool_status.ok() && bool_status.value()) << "Decoding failed";
+
+  bool_status = api.opj_end_decompress(&codec_pointer, &stream_pointer);
+  CHECK(bool_status.ok() && bool_status.value()) << "Ending decompress failed";
+
+  int components = image.data().numcomps;
+
+  // Transfer the read data to the main process.
+  sapi::v::Array<opj_image_comp_t> image_components(components);
+  image_components.SetRemote(image.data().comps);
+  CHECK(sandbox.TransferFromSandboxee(&image_components).ok())
+      << "Transfer from sandboxee failed";
+
+  image.mutable_data()->comps =
+      static_cast<opj_image_comp_t*>(image_components.GetLocal());
+
+  unsigned int width = static_cast<unsigned int>(image.data().comps[0].w);
+  unsigned int height = static_cast<unsigned int>(image.data().comps[0].h);
+
+  std::vector<std::vector<OPJ_INT32>> data(components);
+  sapi::v::Array<OPJ_INT32> image_components_data(width * height);
+
+  for (int i = 0; i < components; ++i) {
+    image_components_data.SetRemote(image.data().comps[i].data);
+    CHECK(sandbox.TransferFromSandboxee(&image_components_data).ok())
+        << "Transfer from sandboxee failed";
+
+    std::vector<OPJ_INT32> component_data(
+        image_components_data.GetData(),
+        image_components_data.GetData() + (width * height));
+    data[i] = std::move(component_data);
+    image_components[i].data = &data[i][0];
+  }
+
+  // Convert the image to the desired format and save it to the file.
+  int error =
+      imagetopnm(static_cast<opj_image_t*>(image.GetLocal()), argv[2], 0);
+  CHECK(!error) << "Image convert failed";
+
+  // Clean up.
+  status = api.opj_image_destroy(image.PtrNone());
+  CHECK(status.ok()) << "Image destroy failed " << status;
+
+  status = api.opj_stream_destroy(&stream_pointer);
+  CHECK(status.ok()) << "Stream destroy failed " << status;
+
+  status = api.opj_destroy_codec(&codec_pointer);
+  CHECK(status.ok()) << "Codec destroy failed " << status;
+
+  return EXIT_SUCCESS;
+}

oss-internship-2020/pffft/.gitignore

@@ -0,0 +1,3 @@
+*.o
+*.a
+pffft_main

oss-internship-2020/pffft/CMakeLists.txt

@@ -0,0 +1,104 @@
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+cmake_minimum_required(VERSION 3.10)
+
+project(pffft CXX C)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED True)
+
+add_library(pffft STATIC
+  master/pffft.c
+  master/pffft.h
+  master/fftpack.c
+  master/fftpack.h
+)
+
+add_executable(pffft_main
+  master/test_pffft.c
+)
+
+target_link_libraries(pffft_main PRIVATE
+  pffft
+)
+
+set(MATH_LIBS "")
+include(CheckLibraryExists)
+check_library_exists(m sin "" LIBM)
+if(LIBM)
+  list(APPEND MATH_LIBS "m")
+endif()
+
+target_link_libraries(pffft PUBLIC ${MATH_LIBS})
+
+# Adding dependencies
+set(SAPI_ROOT "../.." CACHE PATH "Path to the Sandboxed API source tree")
+# Then configure:
+#   mkdir -p build && cd build
+#   cmake .. -G Ninja -DSAPI_ROOT=$HOME/sapi_root
+
+set(SAPI_ENABLE_EXAMPLES OFF CACHE BOOL "")
+set(SAPI_ENABLE_TESTS OFF CACHE BOOL "")
+add_subdirectory("${SAPI_ROOT}"
+                 "${CMAKE_BINARY_DIR}/sandboxed-api-build"
+                 # Omit this to have the full Sandboxed API in IDE
+                 EXCLUDE_FROM_ALL)
+
+add_sapi_library(pffft_sapi
+  FUNCTIONS pffft_new_setup
+            pffft_destroy_setup
+            pffft_transform
+            pffft_transform_ordered
+            pffft_zreorder
+            pffft_zconvolve_accumulate
+            pffft_aligned_malloc
+            pffft_aligned_free
+            pffft_simd_size
+            cffti
+            cfftf
+            cfftb
+            rffti
+            rfftf
+            rfftb
+            cosqi
+            cosqf
+            cosqb
+            costi
+            cost
+            sinqi
+            sinqb
+            sinqf
+            sinti
+            sint
+
+  INPUTS master/pffft.h master/fftpack.h
+  LIBRARY pffft
+  LIBRARY_NAME Pffft
+
+  NAMESPACE ""
+)
+
+target_include_directories(pffft_sapi INTERFACE
+  "${PROJECT_BINARY_DIR}"
+)
+
+add_executable(pffft_sandboxed
+  main_pffft_sandboxed.cc
+)
+
+target_link_libraries(pffft_sandboxed PRIVATE
+  pffft_sapi
+  sapi::sapi
+)

oss-internship-2020/pffft/README.md

@@ -0,0 +1,87 @@
+# Sandboxing PFFFT library
+
+Build System: CMake
+OS: Linux
+
+### Check out the PFFFT library & CMake set up
+```
+git submodule update --init --recursive
+
+mkdir -p build && cd build
+cmake .. -G Ninja -DPFFFT_ROOT_DIR=$PWD
+ninjas
+```
+### For testing:
+`cd build`, then `./pffft_sandboxed`
+
+### For debug:
+display custom info with
+`./pffft_sandboxed --logtostderr`
+
+## ***About the project***
+*PFFFT library is concerned with 1D Fast-Fourier Transformations finding a
+compromise between accuracy and speed. It deals with real and complex
+vectors, both cases being illustrated in the testing part (`test_pffft.c`
+for initially and original version, `main_pffft_sandboxed.cc` for our
+currently implemented sandboxed version).
+The original files can be found at: https://bitbucket.org/jpommier/pffft/src.*
+
+*The purpose of sandboxing is to limit the permissions and capabilities of
+library’s methods, in order to secure the usage of them.
+After obtaining the sandbox, the functions will be called through an
+Sandbox API (being called `api` in the current test) and so, the
+operations, system calls or namspaces access may be controlled.
+From both `pffft.h` and `fftpack.h` headers, useful methods are added to
+sapi library builded with CMake. There is also a need to link math library
+as the transformations made require mathematical operators.
+Regarding the testing of the methods, one main is doing this job by
+iterating through a set of values, that represents the accuracy of
+transformations and print the speed for each value and type of
+transformation. More specifically, the input length is the target for
+accuracy (named as `n`) and it stands for the number of data points from
+the series that calculate the result of transformation. It is also
+important to mention that the `complex` variable stands for a boolean value
+that tells the type of transformation (0 for REAL and 1 for COMPLEX) and
+it is taken into account while testing.
+In the end, the performance of PFFFT library it is outlined by the output.
+There are two output formats available, from which you can choose through
+`--output_format=` command-line flag.
+Without using this type of argument when running, the output format is set
+by default.*
+
+#### CMake observations resume:
+* linking pffft and fftpack (which contains necessary functions for pffft)
+* set math library
+
+#### Sandboxed main observations resume:
+* containing two testing parts (fft / pffft benchmarks)
+* showing the performance of the transformations implies
+  testing them through various FFT dimenstions.
+  Variable n, the input length, will take specific values
+  meaning the number of points to which it is set the calculus
+  (more details of mathematical purpose of n - https://en.wikipedia.org/wiki/Cooley%E2%80%93Tukey_FFT_algorithm).
+* output shows speed depending on the input length
+* use `--output_format=0` or `--output_format=1` arguments to choose between output formats.
+  `0` is for a detailed output, while `1` is only displaying each transformation process speed.
+
+### Bugs history
+1. [Solved] pffft benchmark bug: "Sandbox not active"
+
+   n = 64, status OK, `pffft_transform` generates error
+   n > 64, status not OK
+   Problem on initialising `sapi::StatusOr<PFFFT_Setup *> s;` the memory that stays
+   for s is not the same with the address passed in `pffft_transform` function.
+   (`sapi::v::GenericPtr` - to be changed)
+
+   Temporary solution: change the generated files to accept
+   `uintptr_t` instead of `PFFFT_Setup`
+
+   Solution: using `sapi::v::RemotePtr` instead of `sapi::v::GenericPtr`
+   to access the memory of object `s`
+
+2. [Unresolved] compiling bug: "No space left on device"
+
+   The building process creates some `embed` files that use lots of
+   memory, trying to write them on `/tmp`.
+
+   Temporary solution: clean /tmp directory by `sudo rm -rf /tmp/*`

oss-internship-2020/pffft/main_pffft_sandboxed.cc

@@ -0,0 +1,207 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <gflags/gflags.h>
+
+#include <cmath>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <ctime>
+
+#include <glog/logging.h>
+#include "pffft_sapi.sapi.h"  // NOLINT(build/include)
+#include "sandboxed_api/util/flag.h"
+#include "sandboxed_api/vars.h"
+
+ABSL_DECLARE_FLAG(string, sandbox2_danger_danger_permit_all);
+ABSL_DECLARE_FLAG(string, sandbox2_danger_danger_permit_all_and_log);
+
+class PffftSapiSandbox : public PffftSandbox {
+ public:
+  std::unique_ptr<sandbox2::Policy> ModifyPolicy(sandbox2::PolicyBuilder*) {
+    return sandbox2::PolicyBuilder()
+        .AllowStaticStartup()
+        .AllowOpen()
+        .AllowRead()
+        .AllowWrite()
+        .AllowSystemMalloc()
+        .AllowExit()
+        .AllowSyscalls({
+            __NR_futex,
+            __NR_close,
+            __NR_getrusage,
+        })
+        .BuildOrDie();
+  }
+};
+
+// output_format flag determines whether the output shows information in detail
+// or not. By default, the flag is set as 0, meaning an elaborate display
+// (see ShowOutput method).
+static bool ValidateFlag(const char* flagname, int32_t value) {
+  if (value >= 0 && value < 32768) {
+    return true;
+  }
+
+  LOG(ERROR) << "Invalid value for --" << flagname << ".";
+  return false;
+}
+
+DEFINE_int32(output_format, 0, "Value to specific the output format.");
+DEFINE_validator(output_format, &ValidateFlag);
+
+double UclockSec() { return static_cast<double>(clock()) / CLOCKS_PER_SEC; }
+
+void ShowOutput(const char* name, int n, int complex, float flops, float t0,
+                float t1, int max_iter) {
+  float mflops = flops / 1e6 / (t1 - t0 + 1e-16);
+  if (FLAGS_output_format) {
+    if (flops != -1) {
+      printf("|%9.0f   ", mflops);
+    } else {
+      printf("|      n/a   ");
+    }
+  } else if (flops != -1) {
+    printf("n=%5d, %s %16s : %6.0f MFlops [t=%6.0f ns, %d runs]\n", n,
+           (complex ? "CPLX" : "REAL"), name, mflops,
+           (t1 - t0) / 2 / max_iter * 1e9, max_iter);
+  }
+  fflush(stdout);
+}
+
+absl::Status PffftMain() {
+  LOG(INFO) << "Initializing sandbox...\n";
+
+  PffftSapiSandbox sandbox;
+  SAPI_RETURN_IF_ERROR(sandbox.Init());
+
+  PffftApi api(&sandbox);
+
+  // kTransformSizes is a vector keeping the values by which iterates n, its
+  // value representing the input length. More concrete, n is the number of data
+  // points the caclulus is up to (determinating its accuracy). To show the
+  // performance of Fast-Fourier Transformations the program is testing for
+  // various values of n.
+  constexpr int kTransformSizes[] = {
+      64,      96,  128,  160,  192,  256,  384,  5 * 96,   512,   5 * 128,
+      3 * 256, 800, 1024, 2048, 2400, 4096, 8192, 9 * 1024, 16384, 32768};
+
+  for (int complex : {0, 1}) {
+    for (int n : kTransformSizes) {
+      const int n_float = n * (complex ? 2 : 1);
+      int n_bytes = n_float * sizeof(float);
+
+      std::vector<float> work(2 * n_float + 15, 0.0);
+      sapi::v::Array<float> work_array(&work[0], work.size());
+
+      std::vector<float> x(n_bytes, 0.0);
+      sapi::v::Array<float> x_array(&x[0], x.size());
+
+      std::vector<float> y(n_bytes, 0.0);
+      sapi::v::Array<float> y_array(&y[0], y.size());
+
+      std::vector<float> z(n_bytes, 0.0);
+      sapi::v::Array<float> z_array(&z[0], z.size());
+
+      double t0;
+      double t1;
+      double flops;
+
+      int max_iter = 5120000 / n * 4;
+
+      for (int k = 0; k < n_float; ++k) {
+        x[k] = 0;
+      }
+
+      // FFTPack benchmark
+      {
+        // SIMD_SZ == 4 (returning value of pffft_simd_size())
+        int simd_size_iter = max_iter / 4;
+
+        if (simd_size_iter == 0) simd_size_iter = 1;
+        if (complex) {
+          SAPI_RETURN_IF_ERROR(api.cffti(n, work_array.PtrBoth()))
+        } else {
+          SAPI_RETURN_IF_ERROR(api.rffti(n, work_array.PtrBoth()));
+        }
+        t0 = UclockSec();
+
+        for (int iter = 0; iter < simd_size_iter; ++iter) {
+          if (complex) {
+            SAPI_RETURN_IF_ERROR(
+                api.cfftf(n, x_array.PtrBoth(), work_array.PtrBoth()));
+            SAPI_RETURN_IF_ERROR(
+                api.cfftb(n, x_array.PtrBoth(), work_array.PtrBoth()));
+          } else {
+            SAPI_RETURN_IF_ERROR(
+                api.rfftf(n, x_array.PtrBoth(), work_array.PtrBoth()));
+            SAPI_RETURN_IF_ERROR(
+                api.rfftb(n, x_array.PtrBoth(), work_array.PtrBoth()));
+          }
+        }
+        t1 = UclockSec();
+
+        flops = (simd_size_iter * 2) *
+                ((complex ? 5 : 2.5) * static_cast<double>(n) *
+                 log(static_cast<double>(n)) / M_LN2);
+        ShowOutput("FFTPack", n, complex, flops, t0, t1, simd_size_iter);
+      }
+
+      // PFFFT benchmark
+      {
+        SAPI_ASSIGN_OR_RETURN(
+            PFFFT_Setup * s,
+            api.pffft_new_setup(n, complex ? PFFFT_COMPLEX : PFFFT_REAL));
+
+        sapi::v::RemotePtr s_reg(s);
+
+        t0 = UclockSec();
+        for (int iter = 0; iter < max_iter; ++iter) {
+          SAPI_RETURN_IF_ERROR(
+              api.pffft_transform(&s_reg, x_array.PtrBoth(), z_array.PtrBoth(),
+                                  y_array.PtrBoth(), PFFFT_FORWARD));
+          SAPI_RETURN_IF_ERROR(
+              api.pffft_transform(&s_reg, x_array.PtrBoth(), z_array.PtrBoth(),
+                                  y_array.PtrBoth(), PFFFT_FORWARD));
+        }
+
+        t1 = UclockSec();
+        SAPI_RETURN_IF_ERROR(api.pffft_destroy_setup(&s_reg));
+
+        flops = (max_iter * 2) * ((complex ? 5 : 2.5) * static_cast<double>(n) *
+                                  log(static_cast<double>(n)) / M_LN2);
+        ShowOutput("PFFFT", n, complex, flops, t0, t1, max_iter);
+
+        LOG(INFO) << "n = " << n << " SUCCESSFULLY";
+      }
+    }
+  }
+
+  return absl::OkStatus();
+}
+
+int main(int argc, char* argv[]) {
+  // Initialize Google's logging library.
+  google::InitGoogleLogging(argv[0]);
+
+  gflags::ParseCommandLineFlags(&argc, &argv, true);
+
+  if (absl::Status status = PffftMain(); !status.ok()) {
+    LOG(ERROR) << "Initialization failed: " << status.ToString();
+    return EXIT_FAILURE;
+  }
+
+  return EXIT_SUCCESS;
+}

sandboxed_api/BUILD.bazel

@@ -147,10 +147,10 @@ cc_library(
         ":var_type",
         "//sandboxed_api/sandbox2:comms",
         "//sandboxed_api/util:status",
-        "//sandboxed_api/util:statusor",
         "@com_google_absl//absl/base:core_headers",
         "@com_google_absl//absl/memory",
         "@com_google_absl//absl/status",
+        "@com_google_absl//absl/status:statusor",
         "@com_google_absl//absl/strings",
         "@com_google_absl//absl/strings:str_format",
         "@com_google_absl//absl/synchronization",

sandboxed_api/CMakeLists.txt

@@ -43,6 +43,8 @@ add_library(sapi_embed_file STATIC
 add_library(sapi::embed_file ALIAS sapi_embed_file)
 target_link_libraries(sapi_embed_file PRIVATE
   absl::flat_hash_map
+  absl::status
+  absl::statusor
   absl::strings
   absl::synchronization
   glog::glog
@@ -65,6 +67,8 @@ add_library(sapi::sapi ALIAS sapi_sapi)
 target_link_libraries(sapi_sapi
   PRIVATE absl::flat_hash_map
           absl::memory
+          absl::status
+          absl::statusor
           absl::str_format
           absl::strings
           absl::synchronization
@@ -76,7 +80,6 @@ target_link_libraries(sapi_sapi
           sandbox2::strerror
           sandbox2::util
           sapi::embed_file
-          sapi::status
           sapi::vars
   PUBLIC absl::core_headers
          sandbox2::client
@@ -137,6 +140,8 @@ add_library(sapi_vars STATIC
 add_library(sapi::vars ALIAS sapi_vars)
 target_link_libraries(sapi_vars PRIVATE
   absl::core_headers
+  absl::status
+  absl::statusor
   absl::str_format
   absl::strings
   absl::synchronization
@@ -147,7 +152,6 @@ target_link_libraries(sapi_vars PRIVATE
   sapi::lenval_core
   sapi::proto_arg_proto
   sapi::status
-  sapi::statusor
   sapi::var_type
 )
 
@@ -178,6 +182,7 @@ if(SAPI_ENABLE_TESTS)
   )
   target_link_libraries(sapi_test PRIVATE
     absl::memory
+    absl::status
     benchmark
     sapi::sapi
     sapi::status

sandboxed_api/bazel/BUILD

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+load("@bazel_skylib//:bzl_library.bzl", "bzl_library")
+
 licenses(["notice"])
 
 exports_files([
@@ -19,3 +21,33 @@ exports_files([
     "embed_data.bzl",
     "sapi.bzl",
 ])
+
+bzl_library(
+    name = "build_defs_bzl",
+    srcs = ["build_defs.bzl"],
+    visibility = ["//visibility:private"],
+)
+
+bzl_library(
+    name = "embed_data_bzl",
+    srcs = ["embed_data.bzl"],
+    visibility = ["//visibility:private"],
+)
+
+bzl_library(
+    name = "proto_bzl",
+    srcs = ["proto.bzl"],
+    visibility = ["//visibility:private"],
+)
+
+bzl_library(
+    name = "repositories_bzl",
+    srcs = ["repositories.bzl"],
+    visibility = ["//visibility:private"],
+)
+
+bzl_library(
+    name = "sapi_deps_bzl",
+    srcs = ["sapi_deps.bzl"],
+    visibility = ["//visibility:private"],
+)

sandboxed_api/bazel/embed_data.bzl

@@ -16,8 +16,8 @@
 
 _FILEWRAPPER = "//sandboxed_api/tools/filewrapper"
 
-# TODO(cblichmann): Convert this is to use a "_cc_toolchain" once Bazel #4370
-#                   is fixed.
+# TODO(cblichmann): Convert this to use a "_cc_toolchain" once Bazel #4370 is
+#                   fixed.
 def _sapi_cc_embed_data_impl(ctx):
     cc_file_artifact = None
     h_file_artifact = None

sandboxed_api/bazel/proto.bzl

@@ -56,7 +56,7 @@ def sapi_proto_library(
         deps = [],
         alwayslink = False,
         **kwargs):
-    """Generates proto targets in various languages.
+    """Generates proto library and C++ targets.
 
     Args:
       name: Name for proto_library and base for the cc_proto_library name, name +

sandboxed_api/bazel/sapi.bzl

@@ -254,9 +254,8 @@ def sapi_library(
     native.genrule(
         name = name + ".isystem",
         outs = [name + ".isystem.list"],
-        cmd = """echo |
-                 $(CC) -E -x c++ - -v 2>&1 |
-                 awk '/> search starts here:/{flag=1;next}/End of search/{flag=0}flag' > $@
+        cmd = """$(CC) -E -x c++ -v /dev/null 2>&1 |
+                 awk '/> search starts here:/{f=1;next}/^End of search/{f=0}f{print $$1}' > $@
               """,
         toolchains = ["@bazel_tools//tools/cpp:current_cc_toolchain"],
     )

sandboxed_api/bazel/sapi_deps.bzl

@@ -34,9 +34,9 @@ def sapi_deps():
     maybe(
         http_archive,
         name = "com_google_absl",
-        sha256 = "6668ada01192e2b95b42bb3668cfa5282c047de5176f5e567028e12f8bfb8aef",  # 2020-04-28
-        strip_prefix = "abseil-cpp-6e18c7115df9b7ca0987cc346b1b1d4b3cc829b3",
-        urls = ["https://github.com/abseil/abseil-cpp/archive/6e18c7115df9b7ca0987cc346b1b1d4b3cc829b3.zip"],
+        sha256 = "8061df0ebbd3f599bcd3f5e57fb8003564d50a9b6a81a7f968fb0196b952365d",  # 2020-09-02
+        strip_prefix = "abseil-cpp-0e9921b75a0fdd639a504ec8443fc1fe801becd7",
+        urls = ["https://github.com/abseil/abseil-cpp/archive/0e9921b75a0fdd639a504ec8443fc1fe801becd7.zip"],
     )
     maybe(
         http_archive,

sandboxed_api/call.h

@@ -23,8 +23,8 @@ namespace sapi {
 namespace comms {
 
 struct ReallocRequest {
-  uint64_t old_addr;
-  uint64_t size;
+  uintptr_t old_addr;
+  size_t size;
 };
 
 // Types of TAGs used with Comms channel.

sandboxed_api/client.cc

@@ -229,7 +229,7 @@ void HandleCallMsg(const FuncCall& call, FuncRet* ret) {
 }
 
 // Handles requests to allocate memory inside the sandboxee.
-void HandleAllocMsg(const uintptr_t size, FuncRet* ret) {
+void HandleAllocMsg(const size_t size, FuncRet* ret) {
   VLOG(1) << "HandleAllocMsg: size=" << size;
 
   ret->ret_type = v::Type::kPointer;
@@ -237,16 +237,15 @@ void HandleAllocMsg(const uintptr_t size, FuncRet* ret) {
   // Memory is copied to the pointer using an API that the memory sanitizer
   // is blind to (process_vm_writev). Initialize the memory here so that
   // the sandboxed code can still be tested with the memory sanitizer.
-  ret->int_val =
-      reinterpret_cast<uintptr_t>(calloc(1, static_cast<size_t>(size)));
+  ret->int_val = reinterpret_cast<uintptr_t>(calloc(1, size));
 #else
-  ret->int_val = reinterpret_cast<uintptr_t>(malloc(static_cast<size_t>(size)));
+  ret->int_val = reinterpret_cast<uintptr_t>(malloc(size));
 #endif
   ret->success = true;
 }
 
 // Like HandleAllocMsg(), but handles requests to reallocate memory.
-void HandleReallocMsg(uintptr_t ptr, uintptr_t size, FuncRet* ret) {
+void HandleReallocMsg(uintptr_t ptr, size_t size, FuncRet* ret) {
   VLOG(1) << "HandleReallocMsg(" << absl::StrCat(absl::Hex(ptr)) << ", " << size
           << ")";
 #ifdef MEMORY_SANITIZER
@@ -254,8 +253,8 @@ void HandleReallocMsg(uintptr_t ptr, uintptr_t size, FuncRet* ret) {
       __sanitizer_get_allocated_size(reinterpret_cast<const void*>(ptr));
 #endif
   ret->ret_type = v::Type::kPointer;
-  ret->int_val = reinterpret_cast<uintptr_t>(
-      realloc(const_cast<void*>(reinterpret_cast<const void*>(ptr)), size));
+  ret->int_val =
+      reinterpret_cast<uintptr_t>(realloc(reinterpret_cast<void*>(ptr), size));
   ret->success = true;
 #ifdef MEMORY_SANITIZER
   // Memory is copied to the pointer using an API that the memory sanitizer
@@ -273,7 +272,7 @@ void HandleReallocMsg(uintptr_t ptr, uintptr_t size, FuncRet* ret) {
 void HandleFreeMsg(uintptr_t ptr, FuncRet* ret) {
   VLOG(1) << "HandleFreeMsg: free(0x" << absl::StrCat(absl::Hex(ptr)) << ")";
 
-  free(const_cast<void*>(reinterpret_cast<const void*>(ptr)));
+  free(reinterpret_cast<void*>(ptr));
   ret->ret_type = v::Type::kVoid;
   ret->success = true;
   ret->int_val = 0ULL;
@@ -363,14 +362,13 @@ void ServeRequest(sandbox2::Comms* comms) {
       break;
     case comms::kMsgAllocate:
       VLOG(1) << "Client::kMsgAllocate";
-      HandleAllocMsg(BytesAs<uintptr_t>(bytes), &ret);
+      HandleAllocMsg(BytesAs<size_t>(bytes), &ret);
       break;
     case comms::kMsgReallocate:
       VLOG(1) << "Client::kMsgReallocate";
       {
         auto req = BytesAs<comms::ReallocRequest>(bytes);
-        HandleReallocMsg(static_cast<uintptr_t>(req.old_addr),
-                         static_cast<uintptr_t>(req.size), &ret);
+        HandleReallocMsg(req.old_addr, req.size, &ret);
       }
       break;
     case comms::kMsgFree:

sandboxed_api/examples/stringop/main_stringop.cc

@@ -113,7 +113,7 @@ TEST(StringopTest, RawStringReversal) {
   {
     // Let's call it again with different data as argument, reusing the
     // existing LenVal object.
-    EXPECT_THAT(param.ResizeData(sandbox.GetRpcChannel(), 16), IsOk());
+    EXPECT_THAT(param.ResizeData(sandbox.rpc_channel(), 16), IsOk());
     memcpy(param.GetData() + 10, "ABCDEF", 6);
     absl::string_view data(reinterpret_cast<const char*>(param.GetData()),
                            param.GetDataSize());
@@ -134,8 +134,8 @@ TEST(StringopTest, RawStringLength) {
   ASSERT_THAT(sandbox.Init(), IsOk());
   StringopApi api(&sandbox);
   SAPI_ASSERT_OK_AND_ASSIGN(void* target_mem_ptr, api.get_raw_c_string());
-  SAPI_ASSERT_OK_AND_ASSIGN(uint64_t len,
-                       sandbox.GetRpcChannel()->Strlen(target_mem_ptr));
+  SAPI_ASSERT_OK_AND_ASSIGN(size_t len,
+                       sandbox.rpc_channel()->Strlen(target_mem_ptr));
   EXPECT_THAT(len, Eq(10));
 }
 
@@ -144,8 +144,8 @@ TEST(StringopTest, RawStringReading) {
   ASSERT_THAT(sandbox.Init(), IsOk());
   StringopApi api(&sandbox);
   SAPI_ASSERT_OK_AND_ASSIGN(void* target_mem_ptr, api.get_raw_c_string());
-  SAPI_ASSERT_OK_AND_ASSIGN(uint64_t len,
-                       sandbox.GetRpcChannel()->Strlen(target_mem_ptr));
+  SAPI_ASSERT_OK_AND_ASSIGN(size_t len,
+                       sandbox.rpc_channel()->Strlen(target_mem_ptr));
   EXPECT_THAT(len, Eq(10));
 
   SAPI_ASSERT_OK_AND_ASSIGN(std::string data,

sandboxed_api/examples/sum/main_sum.cc

@@ -161,7 +161,7 @@ absl::Status SumTransaction::Main() {
   LOG(INFO) << "Read from /proc/self/comm = [" << buffer << "]";
 
   // Close test.
-  SAPI_RETURN_IF_ERROR(fd2.CloseRemoteFd(sandbox()->GetRpcChannel()));
+  SAPI_RETURN_IF_ERROR(fd2.CloseRemoteFd(sandbox()->rpc_channel()));
   memset(buffer, 0, sizeof(buffer));
   SAPI_RETURN_IF_ERROR(sandbox()->Call("read", &ret, &fd2, buf.PtrBoth(), &size));
   LOG(INFO) << "Read from closed /proc/self/comm = [" << buffer << "]";

sandboxed_api/examples/zlib/BUILD.bazel

@@ -14,11 +14,11 @@
 
 # Description: Sandboxed API reimplementation of zlib's zpipe.c example.
 
-licenses(["notice"])
-
 load("//sandboxed_api/bazel:build_defs.bzl", "sapi_platform_copts")
 load("//sandboxed_api/bazel:sapi.bzl", "sapi_library")
 
+licenses(["notice"])
+
 sapi_library(
     name = "zlib-sapi",
     srcs = [],
@@ -43,5 +43,6 @@ cc_binary(
         "//sandboxed_api:vars",
         "//sandboxed_api/util:flags",
         "@com_google_absl//absl/base:core_headers",
+        "@com_google_absl//absl/status:statusor",
     ],
 )

sandboxed_api/examples/zlib/CMakeLists.txt

@@ -32,11 +32,11 @@ add_executable(main_zlib
   main_zlib.cc
 )
 target_link_libraries(main_zlib PRIVATE
+  absl::status
   sapi::base
   glog::glog
   sapi::flags
   sapi::sapi
   sapi::status
-  sapi::statusor
   sapi::zlib_sapi
 )

sandboxed_api/examples/zlib/main_zlib.cc

@@ -20,6 +20,7 @@
 #include <glog/logging.h>
 #include "absl/base/macros.h"
 #include "sandboxed_api/util/flag.h"
+#include "absl/status/statusor.h"
 #include "sandboxed_api/examples/zlib/zlib-sapi.sapi.h"
 #include "sandboxed_api/examples/zlib/zlib-sapi_embed.h"
 #include "sandboxed_api/vars.h"
@@ -47,7 +48,7 @@ int main(int argc, char** argv) {
                << status.message();
   }
 
-  sapi::StatusOr<int> ret;
+  absl::StatusOr<int> ret;
   int flush;
   unsigned have;
   sapi::v::Struct<sapi::zlib::z_stream> strm;

sandboxed_api/proto_helper.h

@@ -22,13 +22,13 @@
 #include <vector>
 
 #include "absl/status/status.h"
+#include "absl/status/statusor.h"
 #include "sandboxed_api/proto_arg.pb.h"
-#include "sandboxed_api/util/statusor.h"
 
 namespace sapi {
 
 template <typename T>
-sapi::StatusOr<std::vector<uint8_t>> SerializeProto(const T& proto) {
+absl::StatusOr<std::vector<uint8_t>> SerializeProto(const T& proto) {
   static_assert(std::is_base_of<google::protobuf::Message, T>::value,
                 "Template argument must be a proto message");
   // Wrap protobuf in a envelope so that we know the name of the protobuf
@@ -46,7 +46,7 @@ sapi::StatusOr<std::vector<uint8_t>> SerializeProto(const T& proto) {
 }
 
 template <typename T>
-sapi::StatusOr<T> DeserializeProto(const char* data, size_t len) {
+absl::StatusOr<T> DeserializeProto(const char* data, size_t len) {
   static_assert(std::is_base_of<google::protobuf::Message, T>::value,
                 "Template argument must be a proto message");
   ProtoArg envelope;

sandboxed_api/rpcchannel.cc

@@ -15,6 +15,7 @@
 #include "sandboxed_api/rpcchannel.h"
 
 #include <glog/logging.h>
+#include "absl/status/statusor.h"
 #include "absl/strings/str_cat.h"
 #include "absl/synchronization/mutex.h"
 #include "sandboxed_api/call.h"
@@ -26,8 +27,7 @@ namespace sapi {
 absl::Status RPCChannel::Call(const FuncCall& call, uint32_t tag, FuncRet* ret,
                               v::Type exp_type) {
   absl::MutexLock lock(&mutex_);
-  if (!comms_->SendTLV(tag, sizeof(call),
-                       reinterpret_cast<const uint8_t*>(&call))) {
+  if (!comms_->SendTLV(tag, sizeof(call), &call)) {
     return absl::UnavailableError("Sending TLV value failed");
   }
   SAPI_ASSIGN_OR_RETURN(auto fret, Return(exp_type));
@@ -35,9 +35,9 @@ absl::Status RPCChannel::Call(const FuncCall& call, uint32_t tag, FuncRet* ret,
   return absl::OkStatus();
 }
 
-sapi::StatusOr<FuncRet> RPCChannel::Return(v::Type exp_type) {
+absl::StatusOr<FuncRet> RPCChannel::Return(v::Type exp_type) {
   uint32_t tag;
-  uint64_t len;
+  size_t len;
   FuncRet ret;
   if (!comms_->RecvTLV(&tag, &len, &ret, sizeof(ret))) {
     return absl::UnavailableError("Receiving TLV value failed");
@@ -66,9 +66,7 @@ sapi::StatusOr<FuncRet> RPCChannel::Return(v::Type exp_type) {
 
 absl::Status RPCChannel::Allocate(size_t size, void** addr) {
   absl::MutexLock lock(&mutex_);
-  uint64_t sz = size;
-  if (!comms_->SendTLV(comms::kMsgAllocate, sizeof(sz),
-                       reinterpret_cast<uint8_t*>(&sz))) {
+  if (!comms_->SendTLV(comms::kMsgAllocate, sizeof(size), &size)) {
     return absl::UnavailableError("Sending TLV value failed");
   }
 
@@ -80,12 +78,13 @@ absl::Status RPCChannel::Allocate(size_t size, void** addr) {
 absl::Status RPCChannel::Reallocate(void* old_addr, size_t size,
                                     void** new_addr) {
   absl::MutexLock lock(&mutex_);
-  comms::ReallocRequest req;
-  req.old_addr = reinterpret_cast<uint64_t>(old_addr);
-  req.size = size;
+  comms::ReallocRequest req = {
+      .old_addr = reinterpret_cast<uintptr_t>(old_addr),
+      .size = size,
+  };
 
   if (!comms_->SendTLV(comms::kMsgReallocate, sizeof(comms::ReallocRequest),
-                       reinterpret_cast<uint8_t*>(&req))) {
+                       &req)) {
     return absl::UnavailableError("Sending TLV value failed");
   }
 
@@ -102,9 +101,8 @@ absl::Status RPCChannel::Reallocate(void* old_addr, size_t size,
 
 absl::Status RPCChannel::Free(void* addr) {
   absl::MutexLock lock(&mutex_);
-  uint64_t remote = reinterpret_cast<uint64_t>(addr);
-  if (!comms_->SendTLV(comms::kMsgFree, sizeof(remote),
-                       reinterpret_cast<uint8_t*>(&remote))) {
+  uintptr_t remote = reinterpret_cast<uintptr_t>(addr);
+  if (!comms_->SendTLV(comms::kMsgFree, sizeof(remote), &remote)) {
     return absl::UnavailableError("Sending TLV value failed");
   }
 
@@ -117,8 +115,7 @@ absl::Status RPCChannel::Free(void* addr) {
 
 absl::Status RPCChannel::Symbol(const char* symname, void** addr) {
   absl::MutexLock lock(&mutex_);
-  if (!comms_->SendTLV(comms::kMsgSymbol, strlen(symname) + 1,
-                       reinterpret_cast<const uint8_t*>(symname))) {
+  if (!comms_->SendTLV(comms::kMsgSymbol, strlen(symname) + 1, symname)) {
     return absl::UnavailableError("Sending TLV value failed");
   }
 
@@ -136,9 +133,8 @@ absl::Status RPCChannel::Exit() {
 
   // Try the RPC exit sequence. But, the only thing that matters as a success
   // indicator is whether the Comms channel had been closed
-  bool unused = true;
-  comms_->SendTLV(comms::kMsgExit, sizeof(unused),
-                  reinterpret_cast<uint8_t*>(&unused));
+  comms_->SendTLV(comms::kMsgExit, 0, nullptr);
+  bool unused;
   comms_->RecvBool(&unused);
 
   if (!comms_->IsTerminated()) {
@@ -153,9 +149,7 @@ absl::Status RPCChannel::Exit() {
 
 absl::Status RPCChannel::SendFD(int local_fd, int* remote_fd) {
   absl::MutexLock lock(&mutex_);
-  bool unused = true;
-  if (!comms_->SendTLV(comms::kMsgSendFd, sizeof(unused),
-                       reinterpret_cast<uint8_t*>(&unused))) {
+  if (!comms_->SendTLV(comms::kMsgSendFd, 0, nullptr)) {
     return absl::UnavailableError("Sending TLV value failed");
   }
   if (!comms_->SendFD(local_fd)) {
@@ -172,8 +166,7 @@ absl::Status RPCChannel::SendFD(int local_fd, int* remote_fd) {
 
 absl::Status RPCChannel::RecvFD(int remote_fd, int* local_fd) {
   absl::MutexLock lock(&mutex_);
-  if (!comms_->SendTLV(comms::kMsgRecvFd, sizeof(remote_fd),
-                       reinterpret_cast<uint8_t*>(&remote_fd))) {
+  if (!comms_->SendTLV(comms::kMsgRecvFd, sizeof(remote_fd), &remote_fd)) {
     return absl::UnavailableError("Sending TLV value failed");
   }
 
@@ -190,8 +183,7 @@ absl::Status RPCChannel::RecvFD(int remote_fd, int* local_fd) {
 
 absl::Status RPCChannel::Close(int remote_fd) {
   absl::MutexLock lock(&mutex_);
-  if (!comms_->SendTLV(comms::kMsgClose, sizeof(remote_fd),
-                       reinterpret_cast<uint8_t*>(&remote_fd))) {
+  if (!comms_->SendTLV(comms::kMsgClose, sizeof(remote_fd), &remote_fd)) {
     return absl::UnavailableError("Sending TLV value failed");
   }
 
@@ -202,10 +194,9 @@ absl::Status RPCChannel::Close(int remote_fd) {
   return absl::OkStatus();
 }
 
-sapi::StatusOr<uint64_t> RPCChannel::Strlen(void* str) {
+absl::StatusOr<size_t> RPCChannel::Strlen(void* str) {
   absl::MutexLock lock(&mutex_);
-  if (!comms_->SendTLV(comms::kMsgStrlen, sizeof(str),
-                       reinterpret_cast<uint8_t*>(&str))) {
+  if (!comms_->SendTLV(comms::kMsgStrlen, sizeof(str), &str)) {
     return absl::UnavailableError("Sending TLV value failed");
   }
 

sandboxed_api/rpcchannel.h

@@ -18,11 +18,11 @@
 #include <cstddef>
 
 #include "absl/status/status.h"
+#include "absl/status/statusor.h"
 #include "absl/synchronization/mutex.h"
 #include "sandboxed_api/call.h"
 #include "sandboxed_api/sandbox2/comms.h"
 #include "sandboxed_api/var_type.h"
-#include "sandboxed_api/util/statusor.h"
 
 namespace sapi {
 
@@ -61,13 +61,13 @@ class RPCChannel {
   absl::Status Close(int remote_fd);
 
   // Returns length of a null-terminated c-style string (invokes strlen).
-  sapi::StatusOr<uint64_t> Strlen(void* str);
+  absl::StatusOr<size_t> Strlen(void* str);
 
   sandbox2::Comms* comms() const { return comms_; }
 
  private:
   // Receives the result after a call.
-  sapi::StatusOr<FuncRet> Return(v::Type exp_type);
+  absl::StatusOr<FuncRet> Return(v::Type exp_type);
 
   sandbox2::Comms* comms_;  // Owned by sandbox2;
   absl::Mutex mutex_;

sandboxed_api/sandbox.cc

@@ -84,7 +84,9 @@ void InitDefaultPolicyBuilder(sandbox2::PolicyBuilder* builder) {
           __NR_kill,
           __NR_tgkill,
           __NR_tkill,
+#ifdef __NR_readlink
           __NR_readlink,
+#endif
 #ifdef __NR_arch_prctl  // x86-64 only
           __NR_arch_prctl,
 #endif
@@ -100,7 +102,7 @@ void InitDefaultPolicyBuilder(sandbox2::PolicyBuilder* builder) {
 }
 
 void Sandbox::Terminate(bool attempt_graceful_exit) {
-  if (!IsActive()) {
+  if (!is_active()) {
     return;
   }
 
@@ -129,7 +131,7 @@ static std::string PathToSAPILib(const std::string& lib_path) {
 
 absl::Status Sandbox::Init() {
   // It's already initialized
-  if (IsActive()) {
+  if (is_active()) {
     return absl::OkStatus();
   }
 
@@ -156,7 +158,7 @@ absl::Status Sandbox::Init() {
       }
     }
 
-    std::vector<std::string> args{lib_path};
+    std::vector<std::string> args = {lib_path};
     // Additional arguments, if needed.
     GetArgs(&args);
     std::vector<std::string> envs{};
@@ -214,24 +216,24 @@ absl::Status Sandbox::Init() {
   return absl::OkStatus();
 }
 
-bool Sandbox::IsActive() const { return s2_ && !s2_->IsTerminated(); }
+bool Sandbox::is_active() const { return s2_ && !s2_->IsTerminated(); }
 
 absl::Status Sandbox::Allocate(v::Var* var, bool automatic_free) {
-  if (!IsActive()) {
+  if (!is_active()) {
     return absl::UnavailableError("Sandbox not active");
   }
   return var->Allocate(GetRpcChannel(), automatic_free);
 }
 
 absl::Status Sandbox::Free(v::Var* var) {
-  if (!IsActive()) {
+  if (!is_active()) {
     return absl::UnavailableError("Sandbox not active");
   }
   return var->Free(GetRpcChannel());
 }
 
 absl::Status Sandbox::SynchronizePtrBefore(v::Callable* ptr) {
-  if (!IsActive()) {
+  if (!is_active()) {
     return absl::UnavailableError("Sandbox not active");
   }
   if (ptr->GetType() != v::Type::kPointer) {
@@ -259,11 +261,11 @@ absl::Status Sandbox::SynchronizePtrBefore(v::Callable* ptr) {
   VLOG(3) << "Synchronization (TO), ptr " << p << ", Type: " << p->GetSyncType()
           << " for var: " << p->GetPointedVar()->ToString();
 
-  return p->GetPointedVar()->TransferToSandboxee(GetRpcChannel(), GetPid());
+  return p->GetPointedVar()->TransferToSandboxee(GetRpcChannel(), pid());
 }
 
 absl::Status Sandbox::SynchronizePtrAfter(v::Callable* ptr) const {
-  if (!IsActive()) {
+  if (!is_active()) {
     return absl::UnavailableError("Sandbox not active");
   }
   if (ptr->GetType() != v::Type::kPointer) {
@@ -287,12 +289,12 @@ absl::Status Sandbox::SynchronizePtrAfter(v::Callable* ptr) const {
         p->ToString()));
   }
 
-  return p->GetPointedVar()->TransferFromSandboxee(GetRpcChannel(), GetPid());
+  return p->GetPointedVar()->TransferFromSandboxee(GetRpcChannel(), pid());
 }
 
 absl::Status Sandbox::Call(const std::string& func, v::Callable* ret,
                            std::initializer_list<v::Callable*> args) {
-  if (!IsActive()) {
+  if (!is_active()) {
     return absl::UnavailableError("Sandbox not active");
   }
   // Send data.
@@ -371,29 +373,29 @@ absl::Status Sandbox::Call(const std::string& func, v::Callable* ret,
 }
 
 absl::Status Sandbox::Symbol(const char* symname, void** addr) {
-  if (!IsActive()) {
+  if (!is_active()) {
     return absl::UnavailableError("Sandbox not active");
   }
   return rpc_channel_->Symbol(symname, addr);
 }
 
 absl::Status Sandbox::TransferToSandboxee(v::Var* var) {
-  if (!IsActive()) {
+  if (!is_active()) {
     return absl::UnavailableError("Sandbox not active");
   }
-  return var->TransferToSandboxee(GetRpcChannel(), GetPid());
+  return var->TransferToSandboxee(GetRpcChannel(), pid());
 }
 
 absl::Status Sandbox::TransferFromSandboxee(v::Var* var) {
-  if (!IsActive()) {
+  if (!is_active()) {
     return absl::UnavailableError("Sandbox not active");
   }
-  return var->TransferFromSandboxee(GetRpcChannel(), GetPid());
+  return var->TransferFromSandboxee(GetRpcChannel(), pid());
 }
 
-sapi::StatusOr<std::string> Sandbox::GetCString(const v::RemotePtr& str,
-                                                  uint64_t max_length) {
-  if (!IsActive()) {
+absl::StatusOr<std::string> Sandbox::GetCString(const v::RemotePtr& str,
+                                                size_t max_length) {
+  if (!is_active()) {
     return absl::UnavailableError("Sandbox not active");
   }
 
@@ -436,22 +438,25 @@ const sandbox2::Result& Sandbox::AwaitResult() {
   return result_;
 }
 
-absl::Status Sandbox::SetWallTimeLimit(time_t limit) const {
-  if (!IsActive()) {
+absl::Status Sandbox::SetWallTimeLimit(absl::Duration limit) const {
+  if (!is_active()) {
     return absl::UnavailableError("Sandbox not active");
   }
-  s2_->SetWallTimeLimit(limit);
+  s2_->set_walltime_limit(limit);
   return absl::OkStatus();
 }
 
+absl::Status Sandbox::SetWallTimeLimit(time_t limit) const {
+  return SetWallTimeLimit(absl::Seconds(limit));
+}
+
 void Sandbox::Exit() const {
-  if (!IsActive()) {
+  if (!is_active()) {
     return;
   }
-  // Give it 1 second
-  s2_->SetWallTimeLimit(1);
+  s2_->set_walltime_limit(absl::Seconds(1));
   if (!rpc_channel_->Exit().ok()) {
-    LOG(WARNING) << "rpc_channel->Exit() failed, killing PID: " << GetPid();
+    LOG(WARNING) << "rpc_channel->Exit() failed, killing PID: " << pid();
     s2_->Kill();
   }
 }

sandboxed_api/sandbox.h

@@ -35,18 +35,21 @@ namespace sapi {
 // means to communicate with it (make function calls, transfer memory).
 class Sandbox {
  public:
+  explicit Sandbox(const FileToc* embed_lib_toc)
+      : embed_lib_toc_(embed_lib_toc) {}
+
   Sandbox(const Sandbox&) = delete;
   Sandbox& operator=(const Sandbox&) = delete;
 
-  explicit Sandbox(const FileToc* embed_lib_toc)
-      : comms_(nullptr), pid_(0), embed_lib_toc_(embed_lib_toc) {}
   virtual ~Sandbox();
 
   // Initializes a new sandboxing session.
   absl::Status Init();
 
-  // Is the current sandboxing session alive?
-  bool IsActive() const;
+  ABSL_DEPRECATED("Use sapi::Sandbox::is_active() instead")
+  bool IsActive() const { return is_active(); }
+  // Returns whether the current sandboxing session is active.
+  bool is_active() const;
 
   // Terminates the current sandboxing session (if it exists).
   void Terminate(bool attempt_graceful_exit = true);
@@ -60,9 +63,13 @@ class Sandbox {
   // Getters for common fields.
   sandbox2::Comms* comms() const { return comms_; }
 
+  ABSL_DEPRECATED("Use sapi::Sandbox::rpc_channel() instead")
   RPCChannel* GetRpcChannel() const { return rpc_channel_.get(); }
+  RPCChannel* rpc_channel() const { return rpc_channel_.get(); }
 
+  ABSL_DEPRECATED("Use sapi::Sandbox::pid() instead")
   int GetPid() const { return pid_; }
+  int pid() const { return pid_; }
 
   // Synchronizes the underlying memory for the pointer before the call.
   absl::Status SynchronizePtrBefore(v::Callable* ptr);
@@ -87,7 +94,7 @@ class Sandbox {
   // Frees memory in the sandboxee.
   absl::Status Free(v::Var* var);
 
-  // Finds address of a symbol in the sandboxee.
+  // Finds the address of a symbol in the sandboxee.
   absl::Status Symbol(const char* symname, void** addr);
 
   // Transfers memory (both directions). Status is returned (memory transfer
@@ -95,14 +102,18 @@ class Sandbox {
   absl::Status TransferToSandboxee(v::Var* var);
   absl::Status TransferFromSandboxee(v::Var* var);
 
-  sapi::StatusOr<std::string> GetCString(const v::RemotePtr& str,
-                                           uint64_t max_length = 10 * 1024 *
-                                                                 1024);
+  absl::StatusOr<std::string> GetCString(const v::RemotePtr& str,
+                                         size_t max_length = 10ULL
+                                                             << 20 /* 10 MiB*/
+  );
 
   // Waits until the sandbox terminated and returns the result.
   const sandbox2::Result& AwaitResult();
   const sandbox2::Result& result() const { return result_; }
 
+  absl::Status SetWallTimeLimit(absl::Duration limit) const;
+  ABSL_DEPRECATED(
+      "Use sapi::Sandbox::SetWallTimeLimit(absl::Duration) overload instead")
   absl::Status SetWallTimeLimit(time_t limit) const;
 
  protected:
@@ -144,11 +155,11 @@ class Sandbox {
   sandbox2::Result result_;
 
   // Comms with the sandboxee.
-  sandbox2::Comms* comms_;
+  sandbox2::Comms* comms_ = nullptr;
   // RPCChannel object.
   std::unique_ptr<RPCChannel> rpc_channel_;
   // The main pid of the sandboxee.
-  pid_t pid_;
+  pid_t pid_ = 0;
 
   // FileTOC with the embedded library, takes precedence over GetLibPath if
   // present (not nullptr).

sandboxed_api/sandbox2/BUILD.bazel

@@ -26,6 +26,13 @@ licenses(["notice"])  # Apache 2.0
 
 exports_files(["testdata/hostname"])
 
+cc_library(
+    name = "config",
+    hdrs = ["config.h"],
+    copts = sapi_platform_copts(),
+    deps = ["@com_google_absl//absl/base:config"],
+)
+
 cc_library(
     name = "bpfdisassembler",
     srcs = ["bpfdisassembler.cc"],
@@ -40,6 +47,7 @@ cc_library(
     hdrs = ["regs.h"],
     copts = sapi_platform_copts(),
     deps = [
+        ":config",
         ":syscall",
         ":violation_cc_proto",
         "//sandboxed_api/sandbox2/util:strerror",
@@ -60,6 +68,7 @@ cc_library(
     copts = sapi_platform_copts(),
     visibility = ["//visibility:public"],
     deps = [
+        ":config",
         ":util",
         "@com_google_absl//absl/strings",
         "@com_google_absl//absl/strings:str_format",
@@ -73,6 +82,7 @@ cc_test(
     srcs = ["syscall_test.cc"],
     copts = sapi_platform_copts(),
     deps = [
+        ":config",
         ":syscall",
         "@com_google_absl//absl/strings",
         "@com_google_googletest//:gtest_main",
@@ -85,12 +95,13 @@ cc_library(
     hdrs = ["result.h"],
     copts = sapi_platform_copts(),
     deps = [
+        ":config",
         ":regs",
         ":syscall",
         ":util",
-        "//sandboxed_api/util:statusor",
         "@com_google_absl//absl/memory",
         "@com_google_absl//absl/status",
+        "@com_google_absl//absl/status:statusor",
         "@com_google_absl//absl/strings",
     ],
 )
@@ -272,6 +283,7 @@ cc_library(
     deps = [
         ":client",
         ":comms",
+        ":config",
         ":executor",
         ":fork_client",
         ":forkserver_cc_proto",
@@ -300,12 +312,12 @@ cc_library(
         "//sandboxed_api/util:flags",
         "//sandboxed_api/util:raw_logging",
         "//sandboxed_api/util:status",
-        "//sandboxed_api/util:statusor",
         "@com_google_absl//absl/base:core_headers",
         "@com_google_absl//absl/container:flat_hash_map",
         "@com_google_absl//absl/container:flat_hash_set",
         "@com_google_absl//absl/memory",
         "@com_google_absl//absl/status",
+        "@com_google_absl//absl/status:statusor",
         "@com_google_absl//absl/strings",
         "@com_google_absl//absl/strings:str_format",
         "@com_google_absl//absl/synchronization",
@@ -374,9 +386,9 @@ cc_library(
         "//sandboxed_api/sandbox2/util:fileops",
         "//sandboxed_api/sandbox2/util:strerror",
         "//sandboxed_api/util:raw_logging",
-        "//sandboxed_api/util:statusor",
         "@com_google_absl//absl/memory",
         "@com_google_absl//absl/status",
+        "@com_google_absl//absl/status:statusor",
         "@com_google_absl//absl/strings",
         "@com_google_absl//absl/strings:str_format",
         "@org_kernel_libcap//:libcap",
@@ -404,6 +416,7 @@ cc_library(
     hdrs = ["mounts.h"],
     copts = sapi_platform_copts(),
     deps = [
+        ":config",
         ":mounttree_cc_proto",
         "//sandboxed_api/sandbox2/util:file_base",
         "//sandboxed_api/sandbox2/util:fileops",
@@ -411,10 +424,10 @@ cc_library(
         "//sandboxed_api/sandbox2/util:strerror",
         "//sandboxed_api/util:raw_logging",
         "//sandboxed_api/util:status",
-        "//sandboxed_api/util:statusor",
         "@com_google_absl//absl/base:core_headers",
         "@com_google_absl//absl/container:flat_hash_set",
         "@com_google_absl//absl/status",
+        "@com_google_absl//absl/status:statusor",
         "@com_google_absl//absl/strings",
         "@com_google_protobuf//:protobuf",
     ],
@@ -468,6 +481,7 @@ cc_test(
     ],
     deps = [
         ":comms",
+        ":config",
         ":namespace",
         ":sandbox2",
         ":testing",
@@ -505,12 +519,13 @@ cc_library(
     copts = sapi_platform_copts(),
     visibility = ["//visibility:public"],
     deps = [
+        ":config",
         "//sandboxed_api/sandbox2/util:file_base",
         "//sandboxed_api/sandbox2/util:fileops",
         "//sandboxed_api/sandbox2/util:strerror",
         "//sandboxed_api/util:raw_logging",
-        "//sandboxed_api/util:statusor",
         "@com_google_absl//absl/base:core_headers",
+        "@com_google_absl//absl/status:statusor",
         "@com_google_absl//absl/strings",
         "@com_google_absl//absl/strings:str_format",
     ],
@@ -526,9 +541,9 @@ cc_library(
         ":util",
         "//sandboxed_api/sandbox2/util:strerror",
         "//sandboxed_api/util:status",
-        "//sandboxed_api/util:statusor",
         "@com_google_absl//absl/base:core_headers",
         "@com_google_absl//absl/memory",
+        "@com_google_absl//absl/status:statusor",
         "@com_google_absl//absl/strings",
     ],
 )
@@ -541,6 +556,7 @@ cc_test(
     deps = [
         ":buffer",
         ":comms",
+        ":config",
         ":sandbox2",
         ":testing",
         "//sandboxed_api/util:status_matchers",
@@ -573,10 +589,10 @@ cc_library(
         "//sandboxed_api/util:raw_logging",
         "//sandboxed_api/util:status",
         "//sandboxed_api/util:status_proto",
-        "//sandboxed_api/util:statusor",
         "@com_google_absl//absl/base:core_headers",
         "@com_google_absl//absl/memory",
         "@com_google_absl//absl/status",
+        "@com_google_absl//absl/status:statusor",
         "@com_google_absl//absl/strings",
         "@com_google_absl//absl/strings:str_format",
         "@com_google_absl//absl/synchronization",
@@ -629,6 +645,7 @@ cc_test(
     copts = sapi_platform_copts(),
     data = ["//sandboxed_api/sandbox2/testcases:limits"],
     deps = [
+        ":config",
         ":limits",
         ":sandbox2",
         ":testing",
@@ -671,6 +688,7 @@ cc_test(
         "//sandboxed_api/sandbox2/testcases:policy",
     ],
     deps = [
+        ":config",
         ":limits",
         ":regs",
         ":sandbox2",
@@ -695,6 +713,7 @@ cc_test(
     ],
     tags = ["local"],
     deps = [
+        ":config",
         ":sandbox2",
         ":testing",
         "//sandboxed_api/sandbox2/util:bpf_helper",
@@ -805,6 +824,7 @@ cc_test(
         "//sandboxed_api/util:status_matchers",
         "@com_google_absl//absl/memory",
         "@com_google_absl//absl/status",
+        "@com_google_absl//absl/status:statusor",
         "@com_google_absl//absl/strings",
         "@com_google_glog//:glog",
         "@com_google_googletest//:gtest_main",

sandboxed_api/sandbox2/CMakeLists.txt

@@ -17,6 +17,16 @@ add_subdirectory(unwind)
 add_subdirectory(util)
 add_subdirectory(network_proxy)
 
+# sandboxed_api/sandbox2:config
+add_library(sandbox2_config STATIC
+  config.h
+)
+add_library(sandbox2::config ALIAS sandbox2_config)
+target_link_libraries(sandbox2_config PRIVATE
+  absl::config
+  sapi::base
+)
+
 # sandboxed_api/sandbox2:bpfdisassembler
 add_library(sandbox2_bpfdisassembler STATIC
   bpfdisassembler.cc
@@ -37,6 +47,7 @@ add_library(sandbox2::regs ALIAS sandbox2_regs)
 target_link_libraries(sandbox2_regs PRIVATE
   absl::core_headers
   absl::strings
+  sandbox2::config
   sandbox2::strerror
   sandbox2::syscall
   sandbox2::violation_proto
@@ -72,6 +83,7 @@ target_link_libraries(sandbox2_result PRIVATE
   absl::base
   absl::memory
   absl::strings
+  sandbox2::config
   sandbox2::regs
   sandbox2::syscall
   sandbox2::util
@@ -271,6 +283,8 @@ target_link_libraries(sandbox2_sandbox2
           absl::flat_hash_set
           absl::memory
           absl::optional
+          absl::status
+          absl::statusor
           absl::str_format
           absl::strings
           absl::synchronization
@@ -278,6 +292,7 @@ target_link_libraries(sandbox2_sandbox2
           sandbox2::bpf_helper
           sandbox2::client
           sandbox2::comms
+          sandbox2::config
           sandbox2::executor
           sandbox2::file_base
           sandbox2::fileops
@@ -300,7 +315,6 @@ target_link_libraries(sandbox2_sandbox2
           sandbox2::util
           sandbox2::violation_proto
           sapi::base
-          sapi::statusor
   PUBLIC  sapi::flags
           sapi::status
           sandbox2::logsink
@@ -351,6 +365,8 @@ add_library(sandbox2_forkserver STATIC
 add_library(sandbox2::forkserver ALIAS sandbox2_forkserver)
 target_link_libraries(sandbox2_forkserver PRIVATE
   absl::memory
+  absl::status
+  absl::statusor
   absl::str_format
   absl::strings
   libcap::libcap
@@ -369,7 +385,6 @@ target_link_libraries(sandbox2_forkserver PRIVATE
   sandbox2::util
   sapi::base
   sapi::raw_logging
-  sapi::statusor
 )
 
 # sandboxed_api/sandbox2:fork_client
@@ -397,9 +412,11 @@ target_link_libraries(sandbox2_mounts PRIVATE
   absl::core_headers
   absl::flat_hash_set
   absl::status
+  absl::statusor
   absl::str_format
   absl::strings
   protobuf::libprotobuf
+  sandbox2::config
   sandbox2::file_base
   sandbox2::fileops
   sandbox2::minielf
@@ -408,7 +425,6 @@ target_link_libraries(sandbox2_mounts PRIVATE
   sapi::base
   sapi::raw_logging
   sapi::status
-  sapi::statusor
 )
 
 # sandboxed_api/sandbox2:namespace
@@ -458,13 +474,14 @@ target_link_libraries(sandbox2_util
   PRIVATE absl::core_headers
           absl::str_format
           absl::strings
+          sandbox2::config
           sandbox2::file_base
           sandbox2::fileops
           sandbox2::strerror
           sapi::base
           sapi::raw_logging
-          sapi::statusor
   PUBLIC absl::status
+         absl::statusor
 )
 target_compile_options(sandbox2_util PRIVATE
   # The default is 16384, however we need to do a clone with a
@@ -482,12 +499,13 @@ add_library(sandbox2::buffer ALIAS sandbox2_buffer)
 target_link_libraries(sandbox2_buffer PRIVATE
   absl::core_headers
   absl::memory
+  absl::status
+  absl::statusor
   absl::strings
   sandbox2::strerror
   sandbox2::util
   sapi::base
   sapi::status
-  sapi::statusor
 )
 
 # sandboxed_api/sandbox2:forkserver_proto
@@ -527,6 +545,8 @@ add_library(sandbox2_comms STATIC
 add_library(sandbox2::comms ALIAS sandbox2_comms)
 target_link_libraries(sandbox2_comms
   PRIVATE absl::memory
+          absl::status
+          absl::statusor
           absl::str_format
           absl::strings
           sandbox2::strerror
@@ -534,7 +554,6 @@ target_link_libraries(sandbox2_comms
           sapi::base
           sapi::raw_logging
           sapi::status_proto
-          sapi::statusor
   PUBLIC absl::core_headers
          absl::status
          absl::synchronization
@@ -566,6 +585,7 @@ if(SAPI_ENABLE_TESTS)
   )
   target_link_libraries(syscall_test PRIVATE
     absl::strings
+    sandbox2::config
     sandbox2::syscall
     sapi::test_main
   )
@@ -604,6 +624,7 @@ if(SAPI_ENABLE_TESTS)
     absl::memory
     absl::strings
     sandbox2::comms
+    sandbox2::config
     sandbox2::fileops
     sandbox2::namespace
     sandbox2::sandbox2
@@ -628,6 +649,7 @@ if(SAPI_ENABLE_TESTS)
     absl::memory
     sandbox2::buffer
     sandbox2::comms
+    sandbox2::config
     sandbox2::sandbox2
     sandbox2::testing
     sapi::status_matchers
@@ -702,6 +724,7 @@ if(SAPI_ENABLE_TESTS)
   target_link_libraries(limits_test PRIVATE
     absl::memory
     sandbox2::bpf_helper
+    sandbox2::config
     sandbox2::limits
     sandbox2::sandbox2
     sandbox2::testing
@@ -751,6 +774,7 @@ if(SAPI_ENABLE_TESTS)
     absl::memory
     absl::strings
     sandbox2::bpf_helper
+    sandbox2::config
     sandbox2::limits
     sandbox2::regs
     sandbox2::sandbox2
@@ -776,6 +800,7 @@ if(SAPI_ENABLE_TESTS)
     absl::memory
     absl::strings
     sandbox2::bpf_helper
+    sandbox2::config
     sandbox2::sandbox2
     sandbox2::testing
     sapi::status_matchers
@@ -832,6 +857,7 @@ if(SAPI_ENABLE_TESTS)
   )
   target_link_libraries(stack_trace_test PRIVATE
     absl::memory
+    absl::status
     absl::strings
     sandbox2::bpf_helper
     sandbox2::fileops

sandboxed_api/sandbox2/buffer.cc

@@ -21,6 +21,7 @@
 #include <cerrno>
 
 #include "absl/memory/memory.h"
+#include "absl/status/statusor.h"
 #include "absl/strings/str_cat.h"
 #include "sandboxed_api/sandbox2/util.h"
 #include "sandboxed_api/sandbox2/util/strerror.h"
@@ -28,7 +29,7 @@
 namespace sandbox2 {
 
 // Creates a new Buffer that is backed by the specified file descriptor.
-sapi::StatusOr<std::unique_ptr<Buffer>> Buffer::CreateFromFd(int fd) {
+absl::StatusOr<std::unique_ptr<Buffer>> Buffer::CreateFromFd(int fd) {
   auto buffer = absl::WrapUnique(new Buffer{});
 
   struct stat stat_buf;
@@ -53,7 +54,7 @@ sapi::StatusOr<std::unique_ptr<Buffer>> Buffer::CreateFromFd(int fd) {
 
 // Creates a new Buffer of the specified size, backed by a temporary file that
 // will be immediately deleted.
-sapi::StatusOr<std::unique_ptr<Buffer>> Buffer::CreateWithSize(int64_t size) {
+absl::StatusOr<std::unique_ptr<Buffer>> Buffer::CreateWithSize(int64_t size) {
   int fd;
   if (!util::CreateMemFd(&fd)) {
     return absl::InternalError("Could not create buffer temp file");

sandboxed_api/sandbox2/buffer.h

@@ -19,7 +19,7 @@
 #include <cstdint>
 #include <memory>
 
-#include "sandboxed_api/util/statusor.h"
+#include "absl/status/statusor.h"
 
 namespace sandbox2 {
 
@@ -37,11 +37,11 @@ class Buffer final {
   // Creates a new Buffer that is backed by the specified file descriptor.
   // The Buffer takes ownership of the descriptor and will close it when
   // destroyed.
-  static sapi::StatusOr<std::unique_ptr<Buffer>> CreateFromFd(int fd);
+  static absl::StatusOr<std::unique_ptr<Buffer>> CreateFromFd(int fd);
 
   // Creates a new Buffer of the specified size, backed by a temporary file that
   // will be immediately deleted.
-  static sapi::StatusOr<std::unique_ptr<Buffer>> CreateWithSize(int64_t size);
+  static absl::StatusOr<std::unique_ptr<Buffer>> CreateWithSize(int64_t size);
 
   // Returns a pointer to the buffer, which is read/write.
   uint8_t* data() const { return buf_; }

sandboxed_api/sandbox2/buffer_test.cc

@@ -29,6 +29,7 @@
 #include "gtest/gtest.h"
 #include "absl/memory/memory.h"
 #include "sandboxed_api/sandbox2/comms.h"
+#include "sandboxed_api/sandbox2/config.h"
 #include "sandboxed_api/sandbox2/executor.h"
 #include "sandboxed_api/sandbox2/ipc.h"
 #include "sandboxed_api/sandbox2/policy.h"
@@ -83,19 +84,20 @@ std::unique_ptr<Policy> BufferTestcasePolicy() {
                  .AllowSyscall(__NR_lseek)
                  .AllowSyscall(__NR_close)
                  .BlockSyscallWithErrno(__NR_prlimit64, EPERM)
+#ifdef __NR_open
                  .BlockSyscallWithErrno(__NR_open, ENOENT)
+#endif
                  .BlockSyscallWithErrno(__NR_openat, ENOENT)
+#ifdef __NR_access
                  // On Debian, even static binaries check existence of
                  // /etc/ld.so.nohwcap.
                  .BlockSyscallWithErrno(__NR_access, ENOENT)
+#endif
+#ifdef __NR_faccessat
+                 .BlockSyscallWithErrno(__NR_faccessat, ENOENT)
+#endif
                  .BuildOrDie();
 
-#if defined(__powerpc64__)
-
-  s2p->AllowUnsafeMmapFiles();
-  s2p->AllowUnsafeMmapShared();
-#endif /* defined(__powerpc64__) */
-
   return s2p;
 }
 

sandboxed_api/sandbox2/comms.cc

@@ -36,6 +36,7 @@
 #include "google/protobuf/message.h"
 #include "absl/memory/memory.h"
 #include "absl/status/status.h"
+#include "absl/status/statusor.h"
 #include "absl/strings/str_cat.h"
 #include "absl/strings/str_format.h"
 #include "absl/synchronization/mutex.h"
@@ -44,7 +45,6 @@
 #include "sandboxed_api/util/raw_logging.h"
 #include "sandboxed_api/util/status.h"
 #include "sandboxed_api/util/status_macros.h"
-#include "sandboxed_api/util/statusor.h"
 
 #ifdef MEMORY_SANITIZER
 #include "base/dynamic_annotations.h"
@@ -228,7 +228,7 @@ void Comms::Terminate() {
   }
 }
 
-bool Comms::SendTLV(uint32_t tag, uint64_t length, const uint8_t* bytes) {
+bool Comms::SendTLV(uint32_t tag, size_t length, const void* value) {
   if (length > GetMaxMsgSize()) {
     SAPI_RAW_LOG(ERROR, "Maximum TLV message size exceeded: (%u > %u)", length,
                  GetMaxMsgSize());
@@ -249,14 +249,14 @@ bool Comms::SendTLV(uint32_t tag, uint64_t length, const uint8_t* bytes) {
                 length);
   {
     absl::MutexLock lock(&tlv_send_transmission_mutex_);
-    if (!Send(reinterpret_cast<uint8_t*>(&tag), sizeof(tag))) {
+    if (!Send(&tag, sizeof(tag))) {
       return false;
     }
-    if (!Send(reinterpret_cast<uint8_t*>(&length), sizeof(length))) {
+    if (!Send(&length, sizeof(length))) {
       return false;
     }
     if (length > 0) {
-      if (!Send(bytes, length)) {
+      if (!Send(value, length)) {
         return false;
       }
     }
@@ -265,40 +265,38 @@ bool Comms::SendTLV(uint32_t tag, uint64_t length, const uint8_t* bytes) {
 }
 
 bool Comms::RecvString(std::string* v) {
-  TLV tlv;
-  if (!RecvTLV(&tlv)) {
+  uint32_t tag;
+  if (!RecvTLV(&tag, v)) {
     return false;
   }
 
-  if (tlv.tag != kTagString) {
+  if (tag != kTagString) {
     SAPI_RAW_LOG(ERROR, "Expected (kTagString == 0x%x), got: 0x%x", kTagString,
-                 tlv.tag);
+                 tag);
     return false;
   }
-  v->assign(reinterpret_cast<const char*>(tlv.value.data()), tlv.value.size());
   return true;
 }
 
 bool Comms::SendString(const std::string& v) {
-  return SendTLV(kTagString, v.length(),
-                 reinterpret_cast<const uint8_t*>(v.c_str()));
+  return SendTLV(kTagString, v.length(), v.c_str());
 }
 
 bool Comms::RecvBytes(std::vector<uint8_t>* buffer) {
-  TLV tlv;
-  if (!RecvTLV(&tlv)) {
+  uint32_t tag;
+  if (!RecvTLV(&tag, buffer)) {
     return false;
   }
-  if (tlv.tag != kTagBytes) {
+  if (tag != kTagBytes) {
+    buffer->clear();
     SAPI_RAW_LOG(ERROR, "Expected (kTagBytes == 0x%x), got: 0x%u", kTagBytes,
-                 tlv.tag);
+                 tag);
     return false;
   }
-  buffer->swap(tlv.value);
   return true;
 }
 
-bool Comms::SendBytes(const uint8_t* v, uint64_t len) {
+bool Comms::SendBytes(const uint8_t* v, size_t len) {
   return SendTLV(kTagBytes, len, v);
 }
 
@@ -347,7 +345,7 @@ bool Comms::RecvFD(int* fd) {
 
   const auto op = [&msg](int fd) -> ssize_t {
     PotentiallyBlockingRegion region;
-    // Use syscall, otherwise we would need to whitelist socketcall() on PPC.
+    // Use syscall, otherwise we would need to allow socketcall() on PPC.
     return TEMP_FAILURE_RETRY(
         util::Syscall(__NR_recvmsg, fd, reinterpret_cast<uintptr_t>(&msg), 0));
   };
@@ -419,7 +417,7 @@ bool Comms::SendFD(int fd) {
   int* fds = reinterpret_cast<int*>(CMSG_DATA(cmsg));
   fds[0] = fd;
 
-  InternalTLV tlv = {kTagFd, sizeof(tlv.val), 0};
+  InternalTLV tlv = {kTagFd, 0};
 
   iovec iov;
   iov.iov_base = &tlv;
@@ -462,8 +460,9 @@ bool Comms::SendFD(int fd) {
 }
 
 bool Comms::RecvProtoBuf(google::protobuf::Message* message) {
-  TLV tlv;
-  if (!RecvTLV(&tlv)) {
+  uint32_t tag;
+  std::vector<uint8_t> bytes;
+  if (!RecvTLV(&tag, &bytes)) {
     if (IsConnected()) {
       SAPI_RAW_PLOG(ERROR, "RecvProtoBuf failed for (%s)", socket_name_);
     } else {
@@ -473,11 +472,11 @@ bool Comms::RecvProtoBuf(google::protobuf::Message* message) {
     return false;
   }
 
-  if (tlv.tag != kTagProto2) {
-    SAPI_RAW_LOG(ERROR, "Expected tag: 0x%x, got: 0x%u", kTagProto2, tlv.tag);
+  if (tag != kTagProto2) {
+    SAPI_RAW_LOG(ERROR, "Expected tag: 0x%x, got: 0x%u", kTagProto2, tag);
     return false;
   }
-  return message->ParseFromArray(tlv.value.data(), tlv.value.size());
+  return message->ParseFromArray(bytes.data(), bytes.size());
 }
 
 bool Comms::SendProtoBuf(const google::protobuf::Message& message) {
@@ -513,8 +512,9 @@ socklen_t Comms::CreateSockaddrUn(sockaddr_un* sun) {
   return slen;
 }
 
-bool Comms::Send(const uint8_t* bytes, uint64_t len) {
-  uint64_t total_sent = 0;
+bool Comms::Send(const void* data, size_t len) {
+  size_t total_sent = 0;
+  const char* bytes = reinterpret_cast<const char*>(data);
   const auto op = [bytes, len, &total_sent](int fd) -> ssize_t {
     PotentiallyBlockingRegion region;
     return TEMP_FAILURE_RETRY(write(fd, &bytes[total_sent], len - total_sent));
@@ -545,8 +545,9 @@ bool Comms::Send(const uint8_t* bytes, uint64_t len) {
   return true;
 }
 
-bool Comms::Recv(uint8_t* bytes, uint64_t len) {
-  uint64_t total_recv = 0;
+bool Comms::Recv(void* data, size_t len) {
+  size_t total_recv = 0;
+  char* bytes = reinterpret_cast<char*>(data);
   const auto op = [bytes, len, &total_recv](int fd) -> ssize_t {
     PotentiallyBlockingRegion region;
     return TEMP_FAILURE_RETRY(read(fd, &bytes[total_recv], len - total_recv));
@@ -573,7 +574,7 @@ bool Comms::Recv(uint8_t* bytes, uint64_t len) {
 }
 
 // Internal helper method (low level).
-bool Comms::RecvTL(uint32_t* tag, uint64_t* length) {
+bool Comms::RecvTL(uint32_t* tag, size_t* length) {
   if (!Recv(reinterpret_cast<uint8_t*>(tag), sizeof(*tag))) {
     return false;
   }
@@ -599,50 +600,49 @@ bool Comms::RecvTL(uint32_t* tag, uint64_t* length) {
   return true;
 }
 
-bool Comms::RecvTLV(TLV* tlv) {
-  absl::MutexLock lock(&tlv_recv_transmission_mutex_);
-  uint64_t length;
-  if (!RecvTL(&tlv->tag, &length)) {
-    return false;
-  }
-
-  tlv->value.resize(length);
-  return length == 0 || Recv(tlv->value.data(), length);
+bool Comms::RecvTLV(uint32_t* tag, std::vector<uint8_t>* value) {
+  return RecvTLVGeneric(tag, value);
 }
 
-bool Comms::RecvTLV(uint32_t* tag, std::vector<uint8_t>* value) {
+bool Comms::RecvTLV(uint32_t* tag, std::string* value) {
+  return RecvTLVGeneric(tag, value);
+}
+
+template <typename T>
+bool Comms::RecvTLVGeneric(uint32_t* tag, T* value) {
   absl::MutexLock lock(&tlv_recv_transmission_mutex_);
-  uint64_t length;
+  size_t length;
   if (!RecvTL(tag, &length)) {
     return false;
   }
 
   value->resize(length);
-  return length == 0 || Recv(value->data(), length);
+  return length == 0 || Recv(reinterpret_cast<uint8_t*>(value->data()), length);
 }
 
-bool Comms::RecvTLV(uint32_t* tag, uint64_t* length, void* buffer,
-                    uint64_t buffer_size) {
+bool Comms::RecvTLV(uint32_t* tag, size_t* length, void* buffer,
+                    size_t buffer_size) {
   absl::MutexLock lock(&tlv_recv_transmission_mutex_);
   if (!RecvTL(tag, length)) {
     return false;
   }
 
+  if (*length == 0) {
+    return true;
+  }
+
   if (*length > buffer_size) {
     SAPI_RAW_LOG(ERROR, "Buffer size too small (0x%x > 0x%x)", *length,
                  buffer_size);
     return false;
-  } else if (*length > 0) {
-    if (!Recv(reinterpret_cast<uint8_t*>(buffer), *length)) {
-      return false;
   }
-  }
-  return true;
+
+  return Recv(reinterpret_cast<uint8_t*>(buffer), *length);
 }
 
-bool Comms::RecvInt(void* buffer, uint64_t len, uint32_t tag) {
+bool Comms::RecvInt(void* buffer, size_t len, uint32_t tag) {
   uint32_t received_tag;
-  uint64_t received_length;
+  size_t received_length;
   if (!RecvTLV(&received_tag, &received_length, buffer, len)) {
     return false;
   }

sandboxed_api/sandbox2/comms.h

@@ -60,7 +60,7 @@ class Comms {
   static constexpr uint32_t kTagFd = 0X80000201;
 
   // Any payload size above this limit will LOG(WARNING).
-  static constexpr uint64_t kWarnMsgSize = (256ULL << 20);
+  static constexpr size_t kWarnMsgSize = (256ULL << 20);
 
   // Sandbox2-specific convention where FD=1023 is always passed to the
   // sandboxed process as a communication channel (encapsulated in the
@@ -103,14 +103,17 @@ class Comms {
   // Note: The actual size is "unlimited", although the Buffer API is more
   // efficient for large transfers. There is an arbitrary limit to ~2GiB to
   // avoid protobuf serialization issues.
-  uint64_t GetMaxMsgSize() const { return std::numeric_limits<int32_t>::max(); }
+  size_t GetMaxMsgSize() const { return std::numeric_limits<int32_t>::max(); }
 
-  bool SendTLV(uint32_t tag, uint64_t length, const uint8_t* bytes);
+  bool SendTLV(uint32_t tag, size_t length, const void* value);
   // Receive a TLV structure, the memory for the value will be allocated
   // by std::vector.
   bool RecvTLV(uint32_t* tag, std::vector<uint8_t>* value);
+  // Receive a TLV structure, the memory for the value will be allocated
+  // by std::string.
+  bool RecvTLV(uint32_t* tag, std::string* value);
   // Receives a TLV value into a specified buffer without allocating memory.
-  bool RecvTLV(uint32_t* tag, uint64_t* length, void* buffer, uint64_t buffer_size);
+  bool RecvTLV(uint32_t* tag, size_t* length, void* buffer, size_t buffer_size);
 
   // Sends/receives various types of data.
   bool RecvUint8(uint8_t* v) { return RecvIntGeneric(v, kTagUint8); }
@@ -135,7 +138,7 @@ class Comms {
   bool SendString(const std::string& v);
 
   bool RecvBytes(std::vector<uint8_t>* buffer);
-  bool SendBytes(const uint8_t* v, uint64_t len);
+  bool SendBytes(const uint8_t* v, size_t len);
   bool SendBytes(const std::vector<uint8_t>& buffer);
 
   // Receives remote process credentials.
@@ -174,38 +177,32 @@ class Comms {
   // State of the channel (enum), socket will have to be connected later on.
   State state_ = State::kUnconnected;
 
-  // TLV structure used to pass messages around.
-  struct TLV {
-    uint32_t tag;
-    std::vector<uint8_t> value;
-  };
-
   // Special struct for passing credentials or FDs. Different from the one above
   // as it inlines the value. This is important as the data is transmitted using
   // sendmsg/recvmsg instead of send/recv.
   struct ABSL_ATTRIBUTE_PACKED InternalTLV {
     uint32_t tag;
     uint32_t len;
-    uint64_t val;
   };
 
   // Fills sockaddr_un struct with proper values.
   socklen_t CreateSockaddrUn(sockaddr_un* sun);
 
   // Support for EINTR and size completion.
-  bool Send(const uint8_t* bytes, uint64_t len);
-  bool Recv(uint8_t* bytes, uint64_t len);
+  bool Send(const void* data, size_t len);
+  bool Recv(void* data, size_t len);
 
   // Receives tag and length. Assumes that the `tlv_transmission_mutex_` mutex
   // is locked.
-  bool RecvTL(uint32_t* tag, uint64_t* length)
+  bool RecvTL(uint32_t* tag, size_t* length)
       ABSL_EXCLUSIVE_LOCKS_REQUIRED(tlv_recv_transmission_mutex_);
 
-  // Receives whole TLV structure, allocates memory for the data.
-  bool RecvTLV(TLV* tlv);
+  // T has to be a ContiguousContainer
+  template <typename T>
+  bool RecvTLVGeneric(uint32_t* tag, T* value);
 
   // Receives arbitrary integers.
-  bool RecvInt(void* buffer, uint64_t len, uint32_t tag);
+  bool RecvInt(void* buffer, size_t len, uint32_t tag);
 
   template <typename T>
   bool RecvIntGeneric(T* output, uint32_t tag) {
@@ -214,7 +211,7 @@ class Comms {
 
   template <typename T>
   bool SendGeneric(T value, uint32_t tag) {
-    return SendTLV(tag, sizeof(T), reinterpret_cast<const uint8_t*>(&value));
+    return SendTLV(tag, sizeof(T), &value);
   }
 };
 

sandboxed_api/sandbox2/config.h

@@ -0,0 +1,85 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef SANDBOXED_API_SANDBOX2_CONFIG_H_
+#define SANDBOXED_API_SANDBOX2_CONFIG_H_
+
+#include <cstdint>
+
+#include "absl/base/config.h"
+
+// GCC/Clang define __x86_64__, Visual Studio uses _M_X64
+#if defined(__x86_64__) || defined(_M_X64)
+#define SAPI_X86_64 1
+
+// Check various spellings for 64-bit POWER. Not checking for Visual Studio, as
+// it does not support 64-bit POWER.
+#elif (defined(__PPC64__) || defined(__powerpc64__) || defined(__ppc64__)) && \
+    defined(ABSL_IS_LITTLE_ENDIAN)
+#define SAPI_PPC64_LE 1
+
+// Spellings for AArch64
+#elif defined(__aarch64__) || defined(_M_ARM64)
+#define SAPI_ARM64 1
+#endif
+
+namespace sandbox2 {
+
+namespace cpu {
+
+// CPU architectures known to Sandbox2
+enum Architecture : uint16_t {
+  // Linux: Use a magic value, so it can be easily spotted in the seccomp-bpf
+  // bytecode decompilation stream. Must be < (1<<15), as/ that's the size of
+  // data which can be returned by BPF.
+  kUnknown = 0xCAF0,
+  kX8664,
+  kX86,
+  kPPC64LE,
+  kArm64,
+};
+
+}  // namespace cpu
+
+namespace host_cpu {
+
+// Returns the current host CPU architecture if supported. If not supported,
+// returns cpu::kUnknown.
+constexpr cpu::Architecture Architecture() {
+#if defined(SAPI_X86_64)
+  return cpu::kX8664;
+#elif defined(SAPI_PPC64_LE)
+  return cpu::kPPC64LE;
+#elif defined(SAPI_ARM64)
+  return cpu::kArm64;
+#else
+  return cpu::kUnknown;
+#endif
+}
+
+constexpr bool IsX8664() { return Architecture() == cpu::kX8664; }
+
+constexpr bool IsPPC64LE() { return Architecture() == cpu::kPPC64LE; }
+
+constexpr bool IsArm64() { return Architecture() == cpu::kArm64; }
+
+}  // namespace host_cpu
+
+static_assert(host_cpu::Architecture() != cpu::kUnknown,
+              "Host CPU architecture is not supported: One of x86-64, POWER64 "
+              "(little endian) or AArch64 is required.");
+
+}  // namespace sandbox2
+
+#endif  // SANDBOXED_API_SANDBOX2_CONFIG_H_

sandboxed_api/sandbox2/examples/network_proxy/BUILD.bazel

@@ -27,7 +27,6 @@ cc_binary(
     deps = [
         "//sandboxed_api/sandbox2",
         "//sandboxed_api/sandbox2:comms",
-        "//sandboxed_api/sandbox2/network_proxy:filtering",
         "//sandboxed_api/sandbox2/util:bpf_helper",
         "//sandboxed_api/sandbox2/util:fileops",
         "//sandboxed_api/sandbox2/util:runfiles",
@@ -48,7 +47,9 @@ cc_binary(
         "//sandboxed_api/sandbox2/util:strerror",
         "//sandboxed_api/util:flags",
         "//sandboxed_api/util:status",
-        "//sandboxed_api/util:statusor",
+        "@com_google_absl//absl/status",
+        "@com_google_absl//absl/status:statusor",
+        "@com_google_absl//absl/strings",
         "@com_google_absl//absl/strings:str_format",
     ],
 )

sandboxed_api/sandbox2/examples/network_proxy/CMakeLists.txt

@@ -31,13 +31,14 @@ target_link_libraries(sandbox2_networkproxy_sandbox PRIVATE
   sapi::flags
 )
 
-
 # sandboxed_api/sandbox2/examples/networkproxy:networkproxy_bin
 add_executable(sandbox2_networkproxy_bin
   networkproxy_bin.cc
 )
 add_executable(sandbox2::networkproxy_bin ALIAS sandbox2_networkproxy_bin)
 target_link_libraries(sandbox2_networkproxy_bin PRIVATE
+  absl::status
+  absl::statusor
   absl::str_format
   glog::glog
   gflags::gflags
@@ -48,6 +49,4 @@ target_link_libraries(sandbox2_networkproxy_bin PRIVATE
   sapi::base
   sapi::flags
   sapi::status
-  sapi::statusor
 )
-

sandboxed_api/sandbox2/examples/network_proxy/networkproxy_bin.cc

@@ -12,15 +12,16 @@
 #include <cstring>
 
 #include "sandboxed_api/util/flag.h"
+#include "absl/status/status.h"
+#include "absl/status/statusor.h"
+#include "absl/strings/str_cat.h"
 #include "absl/strings/str_format.h"
 #include "sandboxed_api/sandbox2/client.h"
 #include "sandboxed_api/sandbox2/comms.h"
 #include "sandboxed_api/sandbox2/network_proxy/client.h"
 #include "sandboxed_api/sandbox2/util/fileops.h"
 #include "sandboxed_api/sandbox2/util/strerror.h"
-#include "sandboxed_api/util/status.h"
 #include "sandboxed_api/util/status_macros.h"
-#include "sandboxed_api/util/statusor.h"
 
 ABSL_FLAG(bool, connect_with_handler, true, "Connect using automatic mode.");
 
@@ -58,7 +59,7 @@ absl::Status CommunicationTest(int sock) {
   return absl::OkStatus();
 }
 
-sapi::StatusOr<struct sockaddr_in6> CreateAddres(int port) {
+absl::StatusOr<struct sockaddr_in6> CreateAddres(int port) {
   static struct sockaddr_in6 saddr {};
   saddr.sin6_family = AF_INET6;
   saddr.sin6_port = htons(port);
@@ -86,7 +87,7 @@ absl::Status ConnectWithHandler(int s, const struct sockaddr_in6& saddr) {
   return absl::OkStatus();
 }
 
-sapi::StatusOr<int> ConnectToServer(int port) {
+absl::StatusOr<int> ConnectToServer(int port) {
   SAPI_ASSIGN_OR_RETURN(struct sockaddr_in6 saddr, CreateAddres(port));
 
   sandbox2::file_util::fileops::FDCloser s(socket(AF_INET6, SOCK_STREAM, 0));
@@ -134,7 +135,7 @@ int main(int argc, char** argv) {
     return 2;
   }
 
-  sapi::StatusOr<int> sock_s = ConnectToServer(port);
+  absl::StatusOr<int> sock_s = ConnectToServer(port);
   if (!sock_s.ok()) {
     LOG(ERROR) << sock_s.status().message();
     return 3;

sandboxed_api/sandbox2/examples/static/static_sandbox.cc

@@ -52,8 +52,10 @@ std::unique_ptr<sandbox2::Policy> GetPolicy() {
       // Allow the getpid() syscall.
       .AllowSyscall(__NR_getpid)
 
+#ifdef __NR_access
       // On Debian, even static binaries check existence of /etc/ld.so.nohwcap.
       .BlockSyscallWithErrno(__NR_access, ENOENT)
+#endif
 
       // Examples for AddPolicyOnSyscall:
       .AddPolicyOnSyscall(__NR_write,

sandboxed_api/sandbox2/executor.cc

@@ -86,7 +86,7 @@ pid_t Executor::StartSubProcess(int32_t clone_flags, const Namespace* ns,
   if (!path_.empty()) {
     exec_fd_ = open(path_.c_str(), O_PATH);
     if (exec_fd_ < 0) {
-      LOG(ERROR) << "Could not open file " << path_;
+      PLOG(ERROR) << "Could not open file " << path_;
       return -1;
     }
   }

sandboxed_api/sandbox2/forkserver.cc

@@ -36,6 +36,7 @@
 
 #include "absl/memory/memory.h"
 #include "absl/status/status.h"
+#include "absl/status/statusor.h"
 #include "absl/strings/match.h"
 #include "absl/strings/str_cat.h"
 #include "absl/strings/str_format.h"
@@ -55,7 +56,6 @@
 #include "sandboxed_api/sandbox2/util/fileops.h"
 #include "sandboxed_api/sandbox2/util/strerror.h"
 #include "sandboxed_api/util/raw_logging.h"
-#include "sandboxed_api/util/statusor.h"
 
 namespace {
 // "Moves" the old FD to the new FD number.
@@ -142,7 +142,7 @@ absl::Status SendPid(int signaling_fd) {
   return absl::OkStatus();
 }
 
-sapi::StatusOr<pid_t> ReceivePid(int signaling_fd) {
+absl::StatusOr<pid_t> ReceivePid(int signaling_fd) {
   union {
     struct cmsghdr cmh;
     char ctrl[CMSG_SPACE(sizeof(struct ucred))];

sandboxed_api/sandbox2/limits_test.cc

@@ -23,6 +23,7 @@
 #include "gmock/gmock.h"
 #include "gtest/gtest.h"
 #include "absl/memory/memory.h"
+#include "sandboxed_api/sandbox2/config.h"
 #include "sandboxed_api/sandbox2/executor.h"
 #include "sandboxed_api/sandbox2/policy.h"
 #include "sandboxed_api/sandbox2/policybuilder.h"

sandboxed_api/sandbox2/monitor.cc

@@ -49,6 +49,7 @@
 #include "absl/time/time.h"
 #include "sandboxed_api/sandbox2/client.h"
 #include "sandboxed_api/sandbox2/comms.h"
+#include "sandboxed_api/sandbox2/config.h"
 #include "sandboxed_api/sandbox2/executor.h"
 #include "sandboxed_api/sandbox2/limits.h"
 #include "sandboxed_api/sandbox2/mounts.h"
@@ -761,7 +762,7 @@ void Monitor::LogSyscallViolation(const Syscall& syscall) const {
 void Monitor::EventPtraceSeccomp(pid_t pid, int event_msg) {
   // If the seccomp-policy is using RET_TRACE, we request that it returns the
   // syscall architecture identifier in the SECCOMP_RET_DATA.
-  const auto syscall_arch = static_cast<Syscall::CpuArch>(event_msg);
+  const auto syscall_arch = static_cast<cpu::Architecture>(event_msg);
   Regs regs(pid);
   auto status = regs.Fetch();
   if (!status.ok()) {

sandboxed_api/sandbox2/mounts.cc

@@ -27,19 +27,20 @@
 
 #include "google/protobuf/util/message_differencer.h"
 #include "absl/container/flat_hash_set.h"
+#include "absl/status/statusor.h"
 #include "absl/strings/ascii.h"
 #include "absl/strings/match.h"
 #include "absl/strings/str_cat.h"
 #include "absl/strings/str_join.h"
 #include "absl/strings/str_split.h"
 #include "absl/strings/string_view.h"
+#include "sandboxed_api/sandbox2/config.h"
 #include "sandboxed_api/sandbox2/util/fileops.h"
 #include "sandboxed_api/sandbox2/util/minielf.h"
 #include "sandboxed_api/sandbox2/util/path.h"
 #include "sandboxed_api/sandbox2/util/strerror.h"
 #include "sandboxed_api/util/raw_logging.h"
 #include "sandboxed_api/util/status_macros.h"
-#include "sandboxed_api/util/statusor.h"
 
 namespace sandbox2 {
 namespace {
@@ -97,7 +98,7 @@ absl::string_view GetOutsidePath(const MountTree::Node& node) {
   }
 }
 
-sapi::StatusOr<std::string> ExistingPathInsideDir(
+absl::StatusOr<std::string> ExistingPathInsideDir(
     absl::string_view dir_path, absl::string_view relative_path) {
   auto path = file::CleanPath(file::JoinPath(dir_path, relative_path));
   if (file_util::fileops::StripBasename(path) != dir_path) {
@@ -112,6 +113,8 @@ sapi::StatusOr<std::string> ExistingPathInsideDir(
 absl::Status ValidateInterpreter(absl::string_view interpreter) {
   const absl::flat_hash_set<std::string> allowed_interpreters = {
       "/lib64/ld-linux-x86-64.so.2",
+      "/lib64/ld64.so.2",            // PPC64
+      "/lib/ld-linux-aarch64.so.1",  // AArch64
   };
 
   if (!allowed_interpreters.contains(interpreter)) {
@@ -132,15 +135,21 @@ std::string ResolveLibraryPath(absl::string_view lib_name,
   return "";
 }
 
+constexpr absl::string_view GetPlatformCPUName() {
+  switch (host_cpu::Architecture()) {
+    case cpu::kX8664:
+      return "x86_64";
+    case cpu::kPPC64LE:
+      return "ppc64";
+    case cpu::kArm64:
+      return "aarch64";
+    default:
+      return "unknown";
+  }
+}
+
 std::string GetPlatform(absl::string_view interpreter) {
-#if defined(__x86_64__)
-  constexpr absl::string_view kCpuPlatform = "x86_64";
-#elif defined(__powerpc64__)
-  constexpr absl::string_view kCpuPlatform = "ppc64";
-#else
-  constexpr absl::string_view kCpuPlatform = "unknown";
-#endif
-  return absl::StrCat(kCpuPlatform, "-linux-gnu");
+  return absl::StrCat(GetPlatformCPUName(), "-linux-gnu");
 }
 
 }  // namespace
@@ -496,7 +505,7 @@ std::string MountFlagsToString(uint64_t flags) {
       SAPI_MAP(MS_POSIXACL),
       SAPI_MAP(MS_UNBINDABLE),
       SAPI_MAP(MS_PRIVATE),
-      SAPI_MAP(MS_SLAVE),
+      SAPI_MAP(MS_SLAVE),  // Inclusive language: system constant
       SAPI_MAP(MS_SHARED),
       SAPI_MAP(MS_RELATIME),
       SAPI_MAP(MS_KERNMOUNT),

sandboxed_api/sandbox2/namespace_test.cc

@@ -28,6 +28,7 @@
 #include "absl/strings/numbers.h"
 #include "absl/strings/str_cat.h"
 #include "sandboxed_api/sandbox2/comms.h"
+#include "sandboxed_api/sandbox2/config.h"
 #include "sandboxed_api/sandbox2/executor.h"
 #include "sandboxed_api/sandbox2/policy.h"
 #include "sandboxed_api/sandbox2/policybuilder.h"

sandboxed_api/sandbox2/network_proxy/BUILD.bazel

@@ -30,6 +30,7 @@ cc_library(
         "//sandboxed_api/sandbox2:comms",
         "//sandboxed_api/sandbox2/util:fileops",
         "@com_google_absl//absl/memory",
+        "@com_google_absl//absl/status:statusor",
         "@com_google_absl//absl/strings",
         "@com_google_glog//:glog",
     ],
@@ -43,9 +44,11 @@ cc_library(
     visibility = ["//visibility:public"],
     deps = [
         "//sandboxed_api/sandbox2:comms",
+        "//sandboxed_api/sandbox2:config",
         "//sandboxed_api/sandbox2/util:strerror",
         "//sandboxed_api/util:status",
         "@com_google_absl//absl/memory",
+        "@com_google_absl//absl/status",
         "@com_google_absl//absl/strings",
         "@com_google_absl//absl/synchronization",
         "@com_google_glog//:glog",
@@ -61,7 +64,8 @@ cc_library(
         "//sandboxed_api/sandbox2:comms",
         "//sandboxed_api/sandbox2/util:strerror",
         "//sandboxed_api/util:status",
-        "//sandboxed_api/util:statusor",
+        "@com_google_absl//absl/status",
+        "@com_google_absl//absl/status:statusor",
         "@com_google_absl//absl/strings",
         "@com_google_glog//:glog",
     ],

sandboxed_api/sandbox2/network_proxy/CMakeLists.txt

@@ -33,14 +33,14 @@ add_library(sandbox2_network_proxy_filtering STATIC
   filtering.h
 )
 add_library(sandbox2::network_proxy_filtering ALIAS sandbox2_network_proxy_filtering)
-target_link_libraries(sandbox2_network_proxy_filtering PRIVATE
-  absl::memory
+target_link_libraries(sandbox2_network_proxy_filtering
+  PRIVATE absl::memory
+          absl::status
           glog::glog
           sandbox2::comms
           sandbox2::fileops
           sapi::base
   PUBLIC sapi::status
-  sapi::statusor
 )
 
 # sandboxed_api/sandbox2/network_proxy:client
@@ -54,6 +54,7 @@ target_link_libraries(sandbox2_network_proxy_client PRIVATE
   absl::synchronization
   glog::glog
   sandbox2::comms
+  sandbox2::config
   sandbox2::strerror
   sapi::base
   sapi::status

sandboxed_api/sandbox2/network_proxy/client.cc

@@ -25,9 +25,10 @@
 
 #include <glog/logging.h>
 #include "absl/memory/memory.h"
+#include "absl/status/status.h"
 #include "absl/strings/str_cat.h"
+#include "sandboxed_api/sandbox2/config.h"
 #include "sandboxed_api/sandbox2/util/strerror.h"
-#include "sandboxed_api/util/status.h"
 #include "sandboxed_api/util/status_macros.h"
 
 namespace sandbox2 {
@@ -36,23 +37,26 @@ namespace sandbox2 {
 constexpr int SYS_SECCOMP = 1;
 #endif
 
-#if defined(__x86_64__)
+#if defined(SAPI_X86_64)
 constexpr int kRegResult = REG_RAX;
 constexpr int kRegSyscall = REG_RAX;
 constexpr int kRegArg0 = REG_RDI;
 constexpr int kRegArg1 = REG_RSI;
 constexpr int kRegArg2 = REG_RDX;
-#endif
-#if defined(__powerpc64__)
+#elif defined(SAPI_PPC64_LE)
 constexpr int kRegResult = 3;
 constexpr int kRegSyscall = 0;
 constexpr int kRegArg0 = 3;
 constexpr int kRegArg1 = 4;
 constexpr int kRegArg2 = 5;
+#elif defined(SAPI_ARM64)
+constexpr int kRegResult = 0;
+constexpr int kRegSyscall = 8;
+constexpr int kRegArg0 = 0;
+constexpr int kRegArg1 = 1;
+constexpr int kRegArg2 = 2;
 #endif
 
-constexpr char NetworkProxyClient::kFDName[];
-
 int NetworkProxyClient::ConnectHandler(int sockfd, const struct sockaddr* addr,
                                        socklen_t addrlen) {
   absl::Status status = Connect(sockfd, addr, addrlen);
@@ -154,20 +158,22 @@ void NetworkProxyHandler::InvokeOldAct(int nr, siginfo_t* info,
 
 void NetworkProxyHandler::ProcessSeccompTrap(int nr, siginfo_t* info,
                                              void* void_context) {
-  ucontext_t* ctx = (ucontext_t*)(void_context);
   if (info->si_code != SYS_SECCOMP) {
     InvokeOldAct(nr, info, void_context);
     return;
   }
-  if (!ctx) return;
+  auto* ctx = static_cast<ucontext_t*>(void_context);
+  if (!ctx) {
+    return;
+  }
 
-#if defined(__x86_64__)
+#if defined(SAPI_X86_64)
   auto* registers = ctx->uc_mcontext.gregs;
-#elif defined(__powerpc64__)
+#elif defined(SAPI_PPC64_LE)
   auto* registers = ctx->uc_mcontext.gp_regs;
-  using ppc_gpreg_t = std::decay<decltype(registers[0])>::type;
+#elif defined(SAPI_ARM64)
+  auto* registers = ctx->uc_mcontext.regs;
 #endif
-
   int syscall = registers[kRegSyscall];
 
   int sockfd;
@@ -178,14 +184,13 @@ void NetworkProxyHandler::ProcessSeccompTrap(int nr, siginfo_t* info,
     sockfd = static_cast<int>(registers[kRegArg0]);
     addr = reinterpret_cast<const struct sockaddr*>(registers[kRegArg1]);
     addrlen = static_cast<socklen_t>(registers[kRegArg2]);
-#if defined(__powerpc64__)
+#if defined(SAPI_PPC64_LE)
   } else if (syscall == __NR_socketcall &&
              static_cast<int>(registers[kRegArg0]) == SYS_CONNECT) {
-    ppc_gpreg_t* args = reinterpret_cast<ppc_gpreg_t*>(registers[kRegArg1]);
-
-    sockfd = static_cast<int>(args[0]);
-    addr = reinterpret_cast<const struct sockaddr*>(args[1]);
-    addrlen = static_cast<socklen_t>(args[2]);
+    auto* connect_args = reinterpret_cast<uint64_t*>(registers[kRegArg1]);
+    sockfd = static_cast<int>(connect_args[0]);
+    addr = reinterpret_cast<const struct sockaddr*>(connect_args[1]);
+    addrlen = static_cast<socklen_t>(connect_args[2]);
 #endif
   } else {
     InvokeOldAct(nr, info, void_context);

sandboxed_api/sandbox2/network_proxy/client.h

@@ -17,9 +17,9 @@
 
 #include <netinet/in.h>
 
+#include "absl/status/status.h"
 #include "absl/synchronization/mutex.h"
 #include "sandboxed_api/sandbox2/comms.h"
-#include "sandboxed_api/util/status.h"
 
 namespace sandbox2 {