Add __lsan::ScopedInterceptorDisabler for strerror(3)

Summary:
strerror(3) on NetBSD uses internally TSD with a destructor that is never
fired for exit(3). It's correctly called for pthread_exit(3) scenarios.

This is a case when a leak on exit(3) is expected, unavoidable and harmless.

Reviewers: joerg, vitalybuka, dvyukov, mgorny

Reviewed By: vitalybuka

Subscribers: dmgreen, kristof.beyls, jfb, llvm-commits, #sanitizers

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D67337

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@372461 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 12 insertions, 0 deletions

diff --git a/lib/lsan/lsan_interceptors.cpp b/lib/lsan/lsan_interceptors.cpp
index 84a6acda4..601a5efe9 100644
--- a/lib/lsan/lsan_interceptors.cpp
+++ b/lib/lsan/lsan_interceptors.cpp
@@ -383,6 +383,16 @@ INTERCEPTOR(int, pthread_atfork, void (*prepare)(), void (*parent)(),
 #define LSAN_MAYBE_INTERCEPT_PTHREAD_ATFORK
 #endif
 
+#if SANITIZER_INTERCEPT_STRERROR
+INTERCEPTOR(char *, strerror, int errnum) {
+  __lsan::ScopedInterceptorDisabler disabler;
+  return REAL(strerror)(errnum);
+}
+#define LSAN_MAYBE_INTERCEPT_STRERROR INTERCEPT_FUNCTION(strerror)
+#else
+#define LSAN_MAYBE_INTERCEPT_STRERROR
+#endif
+
 struct ThreadParam {
   void *(*callback)(void *arg);
   void *param;
@@ -496,6 +506,8 @@ void InitializeInterceptors() {
   LSAN_MAYBE_INTERCEPT_ATEXIT;
   LSAN_MAYBE_INTERCEPT_PTHREAD_ATFORK;
 
+  LSAN_MAYBE_INTERCEPT_STRERROR;
+
 #if !SANITIZER_NETBSD && !SANITIZER_FREEBSD
   if (pthread_key_create(&g_thread_finalize_key, &thread_finalize)) {
     Report("LeakSanitizer: failed to create thread key.\n");