[compiler-rt] 8aabde5 - [NFC][sanitizer] Check &real_pthread_join

[Vitaly Buka via llvm-commits]

Author: Vitaly Buka
Date: 2021-12-01T23:59:33-08:00
New Revision: 8aabde5a4b4872767dbd75e517f1a93adf097bc0

URL: https://github.com/llvm/llvm-project/commit/8aabde5a4b4872767dbd75e517f1a93adf097bc0
DIFF: https://github.com/llvm/llvm-project/commit/8aabde5a4b4872767dbd75e517f1a93adf097bc0.diff

LOG: [NFC][sanitizer] Check &real_pthread_join

It's a weak function which may be undefined.

Added: 
    

Modified: 
    compiler-rt/lib/sanitizer_common/sanitizer_linux.cpp

Removed: 
    


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diff  --git a/compiler-rt/lib/sanitizer_common/sanitizer_linux.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_linux.cpp
index ad70d8f1a3f98..2d787332a445a 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_linux.cpp
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_linux.cpp
@@ -1770,7 +1770,8 @@ void *internal_start_thread(void *(*func)(void *arg), void *arg) {
 }
 
 void internal_join_thread(void *th) {
-  real_pthread_join(th, nullptr);
+  if (&real_pthread_join)
+    real_pthread_join(th, nullptr);
 }
 #else
 void *internal_start_thread(void *(*func)(void *), void *arg) { return 0; }