blob: 3f346481ceb202ffbea598ce8cc05a4b42282bb5 [file] [log] [blame]
// Tests that doing dfsan_flush() while another thread is executing doesn't
// segfault.
// RUN: %clang_dfsan %s -o %t && %run %t
// REQUIRES: x86_64-target-arch
#include <assert.h>
#include <pthread.h>
#include <sanitizer/dfsan_interface.h>
#include <stdlib.h>
static unsigned char GlobalBuf[4096];
static int ShutDownThread;
static int StartFlush;
// Access GlobalBuf continuously, causing its shadow to be touched as well.
// When main() calls dfsan_flush(), no segfault should be triggered.
static void *accessGlobalInBackground(void *Arg) {
__atomic_store_n(&StartFlush, 1, __ATOMIC_RELEASE);
while (!__atomic_load_n(&ShutDownThread, __ATOMIC_ACQUIRE))
for (unsigned I = 0; I < sizeof(GlobalBuf); ++I)
return NULL;
int main() {
pthread_t Thread;
pthread_create(&Thread, NULL, accessGlobalInBackground, NULL);
while (!__atomic_load_n(&StartFlush, __ATOMIC_ACQUIRE))
; // Spin
__atomic_store_n(&ShutDownThread, 1, __ATOMIC_RELEASE);
pthread_join(Thread, NULL);
return 0;