20ee72d4cc
dlsym calls into dynamic linker which calls malloc and other things. It's problematic to do it during the actual exit, because it can happen from a singal handler or from within the runtime after we reported the first bug, etc. See https://github.com/google/sanitizers/issues/1440 for an example (captured in the added test). Initialize the callbacks during startup instead. Depends on D110159. Reviewed By: vitalybuka Differential Revision: https://reviews.llvm.org/D110166
23 lines
502 B
C++
23 lines
502 B
C++
// RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
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#include "test.h"
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#include <signal.h>
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#include <sys/types.h>
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static void handler(int, siginfo_t *, void *) {
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write(2, "SIGNAL\n", 7);
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// CHECK: SIGNAL
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_exit(0);
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// CHECK-NOT: ThreadSanitizer: signal-unsafe call
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}
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int main() {
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struct sigaction act = {};
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act.sa_sigaction = &handler;
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act.sa_flags = SA_SIGINFO;
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sigaction(SIGPROF, &act, 0);
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raise(SIGPROF);
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fprintf(stderr, "DONE\n");
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// CHECK-NOT: DONE
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return 0;
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}
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