re PR sanitizer/68824 (libtsan is missing the __interceptor___tls_get_addr symbol...

	PR sanitizer/68824
	* tsan/tsan_interceptors.cc (NEED_TLS_GET_ADDR, __tls_get_addr,
	InitializeInterceptors): Cherry pick upstream r258119.

From-SVN: r232555

diff --git a/libsanitizer/ChangeLog b/libsanitizer/ChangeLog
index 5d25590ae7ccc60dce67f16f11e25f8554758336..c6cdc09badcf36bd7359a29df00367567ac6bb9d 100644 (file)
--- a/libsanitizer/ChangeLog
+++ b/libsanitizer/ChangeLog
@@ -1,3 +1,9 @@
+2016-01-19  Jakub Jelinek  <jakub@redhat.com>
+
+       PR sanitizer/68824
+       * tsan/tsan_interceptors.cc (NEED_TLS_GET_ADDR, __tls_get_addr,
+       InitializeInterceptors): Cherry pick upstream r258119.
+
 2016-01-14  Andreas Tobler  <andreast@gcc.gnu.org>
 
        * configure.ac: Replace the hard-coded -ldl requirement for

diff --git a/libsanitizer/tsan/tsan_interceptors.cc b/libsanitizer/tsan/tsan_interceptors.cc
index 90c1d7bf2436540cf7895cad80ee9ab2534255b9..0c71c008d70498ada32fe5a1a4f02bb93278db09 100644 (file)
--- a/libsanitizer/tsan/tsan_interceptors.cc
+++ b/libsanitizer/tsan/tsan_interceptors.cc
@@ -2227,6 +2227,11 @@ static void HandleRecvmsg(ThreadState *thr, uptr pc,
 // Since the interceptor only initializes memory for msan, the simplest solution
 // is to disable the interceptor in tsan (other sanitizers do not call
 // signal handlers from COMMON_INTERCEPTOR_ENTER).
+// As __tls_get_addr has been intercepted in the past, to avoid breaking
+// libtsan ABI, keep it around, but just call the real function.
+#if SANITIZER_INTERCEPT_TLS_GET_ADDR
+#define NEED_TLS_GET_ADDR
+#endif
 #undef SANITIZER_INTERCEPT_TLS_GET_ADDR
 
 #define COMMON_INTERCEPT_FUNCTION(name) INTERCEPT_FUNCTION(name)
@@ -2446,6 +2451,12 @@ static void syscall_post_fork(uptr pc, int pid) {
 
 #include "sanitizer_common/sanitizer_common_syscalls.inc"
 
+#ifdef NEED_TLS_GET_ADDR
+TSAN_INTERCEPTOR(void *, __tls_get_addr, void *arg) {
+  return REAL(__tls_get_addr)(arg);
+}
+#endif
+
 namespace __tsan {
 
 static void finalize(void *arg) {
@@ -2627,6 +2638,10 @@ void InitializeInterceptors() {
   TSAN_INTERCEPT(__cxa_atexit);
   TSAN_INTERCEPT(_exit);
 
+#ifdef NEED_TLS_GET_ADDR
+  TSAN_INTERCEPT(__tls_get_addr);
+#endif
+
 #if !SANITIZER_MAC
   // Need to setup it, because interceptors check that the function is resolved.
   // But atexit is emitted directly into the module, so can't be resolved.