| The patch is needed in order to support recent glibc (2.34). |
| |
| Upstream-Status: Backport [https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=91f8a7a34cf29ae7c465603a801326767f1cc7e9] |
| |
| Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org> |
| |
| --- |
| --- a/libsanitizer/sanitizer_common/sanitizer_posix_libcdep.cpp 2022-03-15 07:59:54.515325204 -0700 |
| +++ b/libsanitizer/sanitizer_common/sanitizer_posix_libcdep.cpp 2022-03-15 08:01:45.919405931 -0700 |
| @@ -166,9 +166,10 @@ |
| #if !SANITIZER_GO |
| // TODO(glider): different tools may require different altstack size. |
| static uptr GetAltStackSize() { |
| - // SIGSTKSZ is not enough. |
| - static const uptr kAltStackSize = SIGSTKSZ * 4; |
| - return kAltStackSize; |
| + // Note: since GLIBC_2.31, SIGSTKSZ may be a function call, so this may be |
| + // more costly that you think. However GetAltStackSize is only call 2-3 times |
| + // per thread so don't cache the evaluation. |
| + return SIGSTKSZ * 4; |
| } |
| |
| void SetAlternateSignalStack() { |