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https://github.com/google/sandboxed-api.git
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13c28403a6
The Bazel build already queries the current toolchain for its system include directories. This change brings feature parity and is necessary for systems with unusual include locations. PiperOrigin-RevId: 332195812 Change-Id: Ie81d614d21e90b4bd9edf2084ef80bf0d85dd750
195 lines
7.3 KiB
CMake
195 lines
7.3 KiB
CMake
# Copyright 2019 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# Embeds arbitrary binary data into a static library.
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#
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# NAME specifies the name for this target.
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# NAMESPACE is the C++ namespace the generated code is placed in. Can be empty.
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# SOURCES is a list of files that should be embedded. If a source names a
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# target the target binary is embedded instead.
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macro(sapi_cc_embed_data)
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cmake_parse_arguments(_sapi_embed "" "NAME;NAMESPACE" "SOURCES" ${ARGN})
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foreach(src IN LISTS _sapi_embed_SOURCES)
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if(TARGET "${src}")
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list(APPEND _sapi_embed_in "${CMAKE_CURRENT_BINARY_DIR}/${src}")
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else()
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list(APPEND _sapi_embed_in "${src}")
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endif()
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endforeach()
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file(RELATIVE_PATH _sapi_embed_pkg
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"${PROJECT_BINARY_DIR}"
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"${CMAKE_CURRENT_BINARY_DIR}")
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add_custom_command(
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OUTPUT "${_sapi_embed_NAME}.h"
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"${_sapi_embed_NAME}.cc"
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WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
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COMMAND filewrapper "${_sapi_embed_pkg}"
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"${_sapi_embed_NAME}"
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"${_sapi_embed_NAMESPACE}"
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"${CMAKE_CURRENT_BINARY_DIR}/${_sapi_embed_NAME}.h"
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"${CMAKE_CURRENT_BINARY_DIR}/${_sapi_embed_NAME}.cc"
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${_sapi_embed_in}
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DEPENDS ${_sapi_embed_SOURCES}
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VERBATIM
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)
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add_library("${_sapi_embed_NAME}" STATIC
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"${_sapi_embed_NAME}.h"
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"${_sapi_embed_NAME}.cc"
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)
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target_link_libraries("${_sapi_embed_NAME}" PRIVATE
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sapi::base
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absl::core_headers
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)
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endmacro()
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# Adds a library target implementing a sandboxed API for another library.
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# The first argument is the target name, similar to the native add_library().
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# This function implements the same functionality as the Bazel version in
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# sandboxed_api/bazel/sapi.bzl.
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#
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# SOURCES Any additional sources to include with the Sandboxed API library.
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# Typically not necessary, unless the sandbox definition should be in a .cc
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# file instead of the customary "sandbox.h" header. Bazel also has a "hdrs"
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# attribute, but CMake does not distinguish headers from sources.
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# FUNCTIONS A list of functions that to use in from host code. Leaving this
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# list empty will export and wrap all functions found in the library.
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# NOEMBED Whether the SAPI library should be embedded inside host code, so the
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# SAPI Sandbox can be initialized with the
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# ::sapi::Sandbox::Sandbox(FileToc*) constructor.
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# LIBRARY The library target to sandbox and expose to the host code (required).
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# LIBRARY_NAME The name of the class which will proxy the library functions
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# from the functions list (required). You will call functions from the
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# sandboxed library via instances of this class.
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# INPUTS List of source files which the SAPI interface generator should scan
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# for function declarations. Library header files are always scanned, so
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# this can usually be empty/omitted.
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# NAMESPACE C++ namespace identifier to place API class defined by
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# LIBRARY_NAME into.
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# HEADER If set, does not generate an interface header, but uses the one
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# specified.
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function(add_sapi_library)
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set(_sapi_opts NOEMBED)
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set(_sapi_one_value HEADER LIBRARY LIBRARY_NAME NAMESPACE)
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set(_sapi_multi_value SOURCES FUNCTIONS INPUTS)
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cmake_parse_arguments(_sapi
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"${_sapi_opts}"
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"${_sapi_one_value}"
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"${_sapi_multi_value}"
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${ARGN})
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set(_sapi_NAME "${ARGV0}")
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set(_sapi_gen_header "${_sapi_NAME}.sapi.h")
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foreach(func IN LISTS _sapi_FUNCTIONS)
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list(APPEND _sapi_exported_funcs "-Wl,--export-dynamic-symbol,${func}")
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endforeach()
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if(NOT _sapi_exported_funcs)
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set(_sapi_exported_funcs -Wl,--whole-archive
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-Wl,--allow-multiple-definition)
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endif()
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# The sandboxed binary
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set(_sapi_bin "${_sapi_NAME}.bin")
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set(_sapi_force_cxx_linkage
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"${CMAKE_CURRENT_BINARY_DIR}/${_sapi_bin}_force_cxx_linkage.cc")
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file(WRITE "${_sapi_force_cxx_linkage}" "")
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add_executable("${_sapi_bin}" "${_sapi_force_cxx_linkage}")
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# TODO(cblichmann): Use target_link_options on CMake >= 3.13
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target_link_libraries("${_sapi_bin}" PRIVATE
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-fuse-ld=gold
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"${_sapi_LIBRARY}"
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sapi::client
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${CMAKE_DL_LIBS}
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-Wl,-E
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${_sapi_exported_funcs}
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)
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if(NOT _sapi_NOEMBED)
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set(_sapi_embed "${_sapi_NAME}_embed")
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sapi_cc_embed_data(NAME "${_sapi_embed}"
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NAMESPACE "${_sapi_NAMESPACE}"
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SOURCES "${_sapi_bin}"
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)
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endif()
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# Interface
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list_join(_sapi_FUNCTIONS "," _sapi_funcs)
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foreach(src IN LISTS _sapi_INPUTS)
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get_filename_component(src "${src}" ABSOLUTE)
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list(APPEND _sapi_full_inputs "${src}")
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endforeach()
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if(NOT _sapi_NOEMBED)
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set(_sapi_embed_dir "${CMAKE_CURRENT_BINARY_DIR}")
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set(_sapi_embed_name "${_sapi_NAME}")
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endif()
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if(SAPI_ENABLE_GENERATOR)
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add_custom_command(
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OUTPUT "${_sapi_gen_header}"
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COMMAND sapi_generator_tool
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"--sapi_name=${_sapi_LIBRARY_NAME}"
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"--sapi_out=${_sapi_gen_header}"
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"--sapi_embed_dir=${_sapi_embed_dir}"
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"--sapi_embed_name=${_sapi_embed_name}"
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"--sapi_functions=${_sapi_funcs}"
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"--sapi_ns=${_sapi_NAMESPACE}"
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${_sapi_full_inputs}
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COMMENT "Generating interface"
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DEPENDS ${_sapi_INPUTS}
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VERBATIM
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)
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else()
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set(_sapi_isystem "${_sapi_NAME}.isystem")
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list_join(_sapi_full_inputs "," _sapi_full_inputs)
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add_custom_command(
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OUTPUT "${_sapi_gen_header}" "${_sapi_isystem}"
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COMMAND sh -c
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"${CMAKE_CXX_COMPILER} -E -x c++ -v /dev/null 2>&1 | \
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awk '/> search starts here:/{f=1;next}/^End of search/{f=0}f{print $1}' \
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> \"${_sapi_isystem}\""
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COMMAND "${SAPI_PYTHON3_EXECUTABLE}" -B
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"${SAPI_SOURCE_DIR}/sandboxed_api/tools/generator2/sapi_generator.py"
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"--sapi_name=${_sapi_LIBRARY_NAME}"
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"--sapi_out=${_sapi_gen_header}"
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"--sapi_embed_dir=${_sapi_embed_dir}"
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"--sapi_embed_name=${_sapi_embed_name}"
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"--sapi_functions=${_sapi_funcs}"
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"--sapi_ns=${_sapi_NAMESPACE}"
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"--sapi_isystem=${_sapi_isystem}"
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"--sapi_in=${_sapi_full_inputs}"
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COMMENT "Generating interface"
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VERBATIM
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)
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endif()
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# Library with the interface
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if(NOT _sapi_SOURCES)
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set(_sapi_force_cxx_linkage
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"${CMAKE_CURRENT_BINARY_DIR}/${_sapi_NAME}_force_cxx_linkage.cc")
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file(WRITE "${_sapi_force_cxx_linkage}" "")
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list(APPEND _sapi_SOURCES "${_sapi_force_cxx_linkage}")
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endif()
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add_library("${_sapi_NAME}" STATIC
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"${_sapi_gen_header}"
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${_sapi_SOURCES}
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)
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target_link_libraries("${_sapi_NAME}" PRIVATE
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sapi::sapi
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sapi::vars
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)
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if(NOT _sapi_NOEMBED)
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target_link_libraries("${_sapi_NAME}" PRIVATE
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"${_sapi_embed}"
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)
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endif()
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endfunction()
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