I'm going to push the commit to all active branches (except master).
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.
---
libsanitizer/sanitizer_common/sanitizer_posix_libcdep.cpp | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/libsanitizer/sanitizer_common/sanitizer_posix_libcdep.cpp
b/libsanitizer/sanitizer_common/sanitizer_posix_libcdep.cpp
index 7ff48c35851..a65b16f5290 100644
--- a/libsanitizer/sanitizer_common/sanitizer_posix_libcdep.cpp
+++ b/libsanitizer/sanitizer_common/sanitizer_posix_libcdep.cpp
@@ -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() {
--
2.32.0
