forked from OSchip/llvm-project
64 lines
1.3 KiB
C++
64 lines
1.3 KiB
C++
// Stress test of poisoning from signal handler.
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// RUN: %clangxx_msan -std=c++11 -O2 %s -o %t && %run %t
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// RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -std=c++11 -O2 %s -o %t && %run %t
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// RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -fsanitize-memory-use-after-dtor -std=c++11 -O2 %s -o %t && %run %t
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#include <assert.h>
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#include <atomic>
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#include <pthread.h>
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#include <signal.h>
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#include <sys/time.h>
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#include <sanitizer/msan_interface.h>
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std::atomic<int> n = {1000};
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struct Tmp {
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char buff[1];
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~Tmp() {}
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};
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__attribute__((noinline, optnone)) void Poison() {
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// use-after-dtor.
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volatile Tmp t;
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// Regular poisoning.
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__msan_poison(&t, sizeof(t));
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}
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void *thr(void *p) {
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for (; n >= 0;) {
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for (int i = 0; i < 1000; i++) {
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Poison();
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}
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}
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return 0;
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}
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void handler(int) {
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Poison();
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--n;
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}
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int main(int argc, char **argv) {
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const int kThreads = 10;
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pthread_t th[kThreads];
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for (int i = 0; i < kThreads; i++)
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pthread_create(&th[i], 0, thr, 0);
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struct sigaction sa = {};
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sa.sa_handler = handler;
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assert(!sigaction(SIGPROF, &sa, 0));
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itimerval t;
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t.it_value.tv_sec = 0;
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t.it_value.tv_usec = 10;
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t.it_interval = t.it_value;
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assert(!setitimer(ITIMER_PROF, &t, 0));
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for (int i = 0; i < kThreads; i++)
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pthread_join(th[i], 0);
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return 0;
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}
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