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[sanitizer_common] Block asynchronous signals only #98200

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Merged
merged 2 commits into from
Jul 10, 2024
Merged

[sanitizer_common] Block asynchronous signals only #98200

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6a744ae
[sanitizer_common] Add option to block only asynchronous signals
thurstond Jul 9, 2024
da136f9
Unconditionally block asynchronous signals only
thurstond Jul 10, 2024
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11 changes: 11 additions & 0 deletions compiler-rt/lib/sanitizer_common/sanitizer_linux.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -155,6 +155,7 @@ void SetSigProcMask(__sanitizer_sigset_t *set, __sanitizer_sigset_t *oldset) {
CHECK_EQ(0, internal_sigprocmask(SIG_SETMASK, set, oldset));
}

// Block asynchronous signals
void BlockSignals(__sanitizer_sigset_t *oldset) {
__sanitizer_sigset_t set;
internal_sigfillset(&set);
Expand All @@ -170,6 +171,16 @@ void BlockSignals(__sanitizer_sigset_t *oldset) {
// hang.
internal_sigdelset(&set, 31);
# endif

// Don't block synchronous signals
internal_sigdelset(&set, SIGSEGV);
internal_sigdelset(&set, SIGBUS);
internal_sigdelset(&set, SIGILL);
internal_sigdelset(&set, SIGTRAP);
internal_sigdelset(&set, SIGABRT);
internal_sigdelset(&set, SIGFPE);
internal_sigdelset(&set, SIGPIPE);

SetSigProcMask(&set, oldset);
}

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