The feature is pure optimization, but it requires
additional syscalls.
PiperOrigin-RevId: 432954277
Change-Id: I1f345f8a26c86e09611fd575cb6ee080f24cc717
There are a lot of internal users depending on the old behavior of the
libclang-based generator.
PiperOrigin-RevId: 432281224
Change-Id: If82333fc3001f52de59e57a874f28bf8815d0877
The constexpr functions can be used to ensure that all branches actually compile
(unlike plain preprocessor `#ifdef`s).
PiperOrigin-RevId: 432186834
Change-Id: I1a8d97dac8480fe9d4543b0e9e39540ca1efc8fa
munmap is widely used by sanitizer, but it
probably works for Asan/Msan because it's enabled
by unrelated Allow* call.
Move mprotect to shared part as well. It will be
needed for compress_stack_depot.
PiperOrigin-RevId: 431989551
Change-Id: I7695a2de81d8d0b2112d3308778b2e9a9c7cb596
Use [`direct_headers`](https://bazel.build/rules/lib/CompilationContext#direct_headers)
from the Bazel/Blaze compilation context instead of _all_ transitive headers.
For the clang based generator, this means we don't try to parse
`textual_headers`, which will fail (they are by definition not
stand-alone, after all).
PiperOrigin-RevId: 431899423
Change-Id: I7a9dfa0dd93eba14b506b0e7ca6db3ed59b55dd6
Linking glibc in fully static mode is mostly unsupported. While such binaries
can easily be produced, conflicting symbols will often make them crash at
runtime. This happens because glibc will always (try to) load some dynamically
linked libraries, even when statically linked. This includes things like the
resolver, unicode/locale handling and others.
Internally at Google, this is not a concern due to the way glibc is being built
there. But in order to make all of our tests run in the open-source version of
this code, we need to change strategy a bit.
As a rule of thumb, glibc can safely be linked statically if a program is
resonably simple and does not use any networking of locale dependent
facilities. Calling syscalls directly instead of the corresponding libc
wrappers works as well, of course.
This change adjusts linker flags and sandbox policies to be more compatible
with regular Linux distributions.
Tested:
- `ctest -R '[A-Z].*'` (all SAPI/Sandbox2 tests)
PiperOrigin-RevId: 429025901
Change-Id: I46b677d9eb61080a8fe868002a34a77de287bf2d
- Link `zipe.c` statically (safe)
- Update policy to allow any use of `stat()`
PiperOrigin-RevId: 428971638
Change-Id: Ib0f5f496ea2389582986b41a8830592e6c1d4390
Instead of C++17 structured bindings, use a plain `const auto&` and annotate
arguments with comments instead.
We still support Clang 6.0, as that is the compiler that ships with Ubuntu
18.04 LTS by default.
PiperOrigin-RevId: 428016214
Change-Id: I3a43b2d47c6825ac4425d22018750282cfe23c1b
This fixes a couple of tests in the open source version of the code.
Internally, since we are using a different ELF loader, the page offset
will always be zero. Hence we never notices this was broken.
PiperOrigin-RevId: 427996428
Change-Id: I44c5b5610b074cf69b9f0c5eeb051be50923e351
Note that `//sandboxed_api/sandbox2:stack_trace_test` may still fail for
unrelated reasons, as we are linking libc statically, which is brittle. A
follow-up change will fix this.
PiperOrigin-RevId: 427175045
Change-Id: Ifb5ec2ac3d60f4bcc9708f26c834c83b75e769d7
This partially reverts the zlib change in 41e0ca0. Turns out the
`CMakeLists.txt` that ships with zlib leaves much to be desired.
PiperOrigin-RevId: 424800727
Change-Id: I356e3bb8d18461a52f845baa4913adff6549ef00
Plain `readdir` is preferred and while not (yet) specified in POSIX it is thread-safe for different directory streams in popular implementations.
PiperOrigin-RevId: 423321528
Change-Id: I4e1e842f338ff7d690c36e7f699b2f3637609524
Newer versions of libunwind use `PTRACE_GETREGSET` to obtain register data.
This change should make it easier to upgrade the libunwind dependency.
PiperOrigin-RevId: 420057842
Change-Id: Ib9abbeff574e457009709715f912ba5962033c5d
Raw `SAPI_RAW_PCHECK` may dump core, depending on environment settings
(issue #89).
This is undesirable in the face of invalid command-line arguments.
Signed-off-by: Christian Blichmann <cblichmann@google.com>
- Allow to specify multiple syscalls with `BlockSyscallsWithErrno()`
- Add functions to allow `unlink()` and `rename()` in all their spellings
PiperOrigin-RevId: 414987303
Change-Id: Ic0e680b785e8e3a3498f20e6a7403737e63fe876
__sanitizer_sandbox_on_notify is not tsan specific.
It's empty for other sanitizers now, but we are going to need it soon.
PiperOrigin-RevId: 414873197
Change-Id: I251ac38e5c886980b4baa7f05306643599a25090
Move VecStringToCharPtrArr before fork, so that it cannot deadlock when other thread holds allocation lock.
PiperOrigin-RevId: 414661912
Change-Id: Ie8aa5c36693e6f86c69d67a1da51b7e7ff1ec30b
This change is a first step to make the SAPI variable hierarchy more sensible.
It turns the `Reg<T>` class into a descendant of `Pointable`, but without
making its `PtrXXX()` methods public (hence the `using` statements). Further
changes are needed to restructure this.
There are no functional changes and the class sizes, including vtables, should
not change.
PiperOrigin-RevId: 413333120
Change-Id: I90ceeaeb7aea482016f8f4bee81489d5a9db9ade
Different versions of the `elf.h` header define their own integer types. For
example, even on LP64 systems, a 64-bit ELF integer types may decay into
`unsigned long long` instead of `unsigned long`.
This change replaces the various overloads with a single function template
that is well-defined for all integral types.
PiperOrigin-RevId: 410746713
Change-Id: I4b560f7541802372f01ae3d6f4a56554e51d70c8
Generate syscall jump table without using bpf_helper.
Check that any jump in the user provided policy is within the provided policy.
PiperOrigin-RevId: 409362089
Change-Id: I31493e52cf868e4b184ff79fcb26beeb75f49773
This is mainly so that the structure of the examples follows what we do
internally (not having separate directories).
PiperOrigin-RevId: 402298115
Change-Id: I0f542607b88597572de39532364816f80a076697
This is the first change in a series that will eventually remove Sandboxed
API's use of multiple inheritance.
Drive-by:
- Rename short member names to full words
- Some reformatting
PiperOrigin-RevId: 402270954
Change-Id: I8af46b887921265a371b85603fd158ef3a8fab50
Note: This change allows `MAP_NORESERVE` generally, not just for MSAN. This follows
what we do for `AllowTcMalloc()/AllowSystemMalloc()`
PiperOrigin-RevId: 402231980
Change-Id: Ifa1c6b9f61f636dd6db231dde3765c3b4a40911b
These were previously dependent on an internal-only testing target.
For now, this only works with Bazel, but should enable us to have better test coverage in GitHub actions.
Eventually, all of these shell-based tests should be converted to `cc_test`s.
PiperOrigin-RevId: 400713615
Change-Id: I1cabb5b72977987ef4a1803480f699b58c4d56e9
