tsan: fix another crash due to processors

Another stack where we try to free sync objects,
but don't have a processors is:

  //   ResetRange
  //   __interceptor_munmap
  //   __deallocate_stack
  //   start_thread
  //   clone

Again, it is a latent bug that lead to memory leaks.
Also, increase amount of memory we scan in MetaMap::ResetRange.
Without that the test does not fail, as we fail to free
the sync objects on stack.



git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@269041 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 30 insertions, 0 deletions

diff --git a/test/tsan/lots_of_threads.c b/test/tsan/lots_of_threads.c
new file mode 100644
index 000000000..eef9b1cb0
--- /dev/null
+++ b/test/tsan/lots_of_threads.c
@@ -0,0 +1,30 @@
+// RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
+#include "test.h"
+
+void *thr(void *arg) {
+  // Create a sync object on stack, so there is something to free on thread end.
+  volatile int x;
+  __atomic_fetch_add(&x, 1, __ATOMIC_SEQ_CST);
+  barrier_wait(&barrier);
+  return 0;
+}
+
+int main() {
+  const int kThreads = 10;
+  barrier_init(&barrier, kThreads + 1);
+  pthread_t t[kThreads];
+  pthread_attr_t attr;
+  pthread_attr_init(&attr);
+  pthread_attr_setstacksize(&attr, 16 << 20);
+  pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+  for (int i = 0; i < kThreads; i++)
+    pthread_create(&t[i], &attr, thr, 0);
+  pthread_attr_destroy(&attr);
+  barrier_wait(&barrier);
+  sleep(1);
+  fprintf(stderr, "DONE\n");
+  return 0;
+}
+
+// CHECK: DONE
+