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[TSan] Don't flush all file streams on program shutdown to avoid deadlocks on file stream locks. 

This should fix https://code.google.com/p/thread-sanitizer/issues/detail?id=47.

llvm-svn: 200922
This commit is contained in:
Alexander Potapenko 2014-02-06 13:37:14 +00:00
parent 1e378e428b
commit a1193a50b0
1 changed files with 6 additions and 1 deletions
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7
compiler-rt/lib/tsan/rtl/tsan_interceptors.cc
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@ -62,6 +62,7 @@ extern "C" void *__libc_calloc(uptr size, uptr n);
extern "C" void *__libc_realloc(void *ptr, uptr size);
extern "C" void __libc_free(void *ptr);
extern "C" int mallopt(int param, int value);
extern void *stdout, *stderr;
const int PTHREAD_MUTEX_RECURSIVE = 1;
const int PTHREAD_MUTEX_RECURSIVE_NP = 1;
const int EINVAL = 22;
@ -2103,7 +2104,11 @@ static void finalize(void *arg) {
uptr pc = 0;
atexit_ctx->exit(thr, pc);
int status = Finalize(thr);
REAL(fflush)(0);
// Make sure the output is not lost.
// Flushing all the streams here may freeze the process if a child thread is
// performing file stream operations at the same time.
REAL(fflush)(stdout);
REAL(fflush)(stderr);
if (status)
REAL(_exit)(status);
}