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author | Jordan Rupprecht <rupprecht@google.com> | 2019-05-14 21:58:59 +0000 |
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committer | Jordan Rupprecht <rupprecht@google.com> | 2019-05-14 21:58:59 +0000 |
commit | b6bc976d7be8ee56d3be4b6dbd2f3ab0a4021c86 (patch) | |
tree | f5ed5db8cb5d237a073ea00c4d4cd63153a16a6c /test/tsan/libdispatch/dispatch_once_deadlock.c | |
parent | 05342ccc9cff16425c0a831fddd510879544a0bf (diff) | |
parent | 098ca93185735ec3687106d0967a70fc99a85059 (diff) | |
download | compiler-rt-google/stable.tar.gz |
Creating branches/google/stable and tags/google/stable/2019-05-14 from r360103google/stable
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/branches/google/stable@360714 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/tsan/libdispatch/dispatch_once_deadlock.c')
-rw-r--r-- | test/tsan/libdispatch/dispatch_once_deadlock.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/test/tsan/libdispatch/dispatch_once_deadlock.c b/test/tsan/libdispatch/dispatch_once_deadlock.c new file mode 100644 index 000000000..8379f81a9 --- /dev/null +++ b/test/tsan/libdispatch/dispatch_once_deadlock.c @@ -0,0 +1,43 @@ +// Check that calling dispatch_once from a report callback works. + +// RUN: %clang_tsan %s -o %t +// RUN: not %run %t 2>&1 | FileCheck %s + +#include <dispatch/dispatch.h> + +#include <pthread.h> +#include <stdio.h> + +long g = 0; +long h = 0; +void f() { + static dispatch_once_t onceToken; + dispatch_once(&onceToken, ^{ + g++; + }); + h++; +} + +void __tsan_on_report() { + fprintf(stderr, "Report.\n"); + f(); +} + +int main() { + fprintf(stderr, "Hello world.\n"); + + f(); + + pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER; + pthread_mutex_unlock(&mutex); // Unlock of an unlocked mutex + + fprintf(stderr, "g = %ld.\n", g); + fprintf(stderr, "h = %ld.\n", h); + fprintf(stderr, "Done.\n"); +} + +// CHECK: Hello world. +// CHECK: Report. +// CHECK: g = 1 +// CHECK: h = 2 +// CHECK: Done. |