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sanitizer: cherry pick 414482751452e54710f16bae58458c66298aaf69

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The patch is needed in order to support recent glibc (2.34).

libsanitizer/ChangeLog:

	PR sanitizer/101749
	* sanitizer_common/sanitizer_posix_libcdep.cpp: Prevent
	generation of dependency on _cxa_guard for static
	initialization.
This commit is contained in:
Martin Liska 2021-08-05 10:43:17 +02:00
parent 5b857c033e
commit 91f8a7a34c
1 changed files with 4 additions and 3 deletions
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libsanitizer/sanitizer_common/sanitizer_posix_libcdep.cpp
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@ -166,9 +166,10 @@ bool SupportsColoredOutput(fd_t fd) {
#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() {