diff options
Diffstat (limited to 'test/tsan/tsan-vs-gvn.cc')
-rw-r--r-- | test/tsan/tsan-vs-gvn.cc | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/test/tsan/tsan-vs-gvn.cc b/test/tsan/tsan-vs-gvn.cc new file mode 100644 index 0000000000000..950f5d30d4da0 --- /dev/null +++ b/test/tsan/tsan-vs-gvn.cc @@ -0,0 +1,38 @@ +// RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s +// RUN: %clangxx_tsan -O2 %s -o %t && %run %t 2>&1 | FileCheck %s +// RUN: %clangxx_tsan -O3 %s -o %t && %run %t 2>&1 | FileCheck %s +// +// Check that load widening is not tsan-hostile. +#include <pthread.h> +#include <stdio.h> +#include <string.h> + +struct { + int i; + char c1, c2, c3, c4; +} S; + +int G; + +void *Thread1(void *x) { + G = S.c1 + S.c3; + return NULL; +} + +void *Thread2(void *x) { + S.c2 = 1; + return NULL; +} + +int main() { + pthread_t t[2]; + memset(&S, 123, sizeof(S)); + pthread_create(&t[0], NULL, Thread1, NULL); + pthread_create(&t[1], NULL, Thread2, NULL); + pthread_join(t[0], NULL); + pthread_join(t[1], NULL); + printf("PASS\n"); +} + +// CHECK-NOT: WARNING: ThreadSanitizer: data race +// CHECK: PASS |