[all-commits] [llvm/llvm-project] 28c912: [compiler-rt] implement sigaltstack interception

[Evgenii Stepanov via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 28c91219c7e2180c3605ce403c05c4eccac6f615
      https://github.com/llvm/llvm-project/commit/28c91219c7e2180c3605ce403c05c4eccac6f615
  Author: Evgenii Stepanov <eugenis at google.com>
  Date:   2020-02-03 (Mon, 03 Feb 2020)

  Changed paths:
    M compiler-rt/include/sanitizer/linux_syscall_hooks.h
    M compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc
    M compiler-rt/lib/sanitizer_common/sanitizer_common_syscalls.inc
    M compiler-rt/lib/sanitizer_common/sanitizer_platform_interceptors.h
    M compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.cpp
    M compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.h
    A compiler-rt/test/msan/sigaltstack.cpp

  Log Message:
  -----------
  [compiler-rt] implement sigaltstack interception

Summary:
An implementation for `sigaltstack` to make its side effect be visible to MSAN.

```
ninja check-msan
```

Reviewers: vitalybuka, eugenis

Reviewed By: eugenis

Subscribers: dberris, #sanitizers, llvm-commits

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D73816

Patch by Igor Sugak.