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Diffstat (limited to 'lib/tsan/lit_tests/memcpy_race.cc')
-rw-r--r-- | lib/tsan/lit_tests/memcpy_race.cc | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/lib/tsan/lit_tests/memcpy_race.cc b/lib/tsan/lit_tests/memcpy_race.cc new file mode 100644 index 000000000000..806740dda241 --- /dev/null +++ b/lib/tsan/lit_tests/memcpy_race.cc @@ -0,0 +1,40 @@ +// RUN: %clangxx_tsan -O1 %s -o %t && %t 2>&1 | FileCheck %s +#include <pthread.h> +#include <stddef.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> + +char *data = new char[10]; +char *data1 = new char[10]; +char *data2 = new char[10]; + +void *Thread1(void *x) { + memcpy(data+5, data1, 1); + return NULL; +} + +void *Thread2(void *x) { + sleep(1); + memcpy(data+3, data2, 4); + return NULL; +} + +int main() { + fprintf(stderr, "addr=%p\n", &data[5]); + pthread_t t[2]; + pthread_create(&t[0], NULL, Thread1, NULL); + pthread_create(&t[1], NULL, Thread2, NULL); + pthread_join(t[0], NULL); + pthread_join(t[1], NULL); + return 0; +} + +// CHECK: addr=[[ADDR:0x[0-9,a-f]+]] +// CHECK: WARNING: ThreadSanitizer: data race +// CHECK: Write of size 1 at [[ADDR]] by thread T2: +// CHECK: #0 memcpy +// CHECK: #1 Thread2 +// CHECK: Previous write of size 1 at [[ADDR]] by thread T1: +// CHECK: #0 memcpy +// CHECK: #1 Thread1 |