Apply fix for ThreadSanitizer false positive data race reports

Merge commit 28fb22c90fe7 from llvm git (by Dimitry Andric):

  [TSan] Handle FreeBSD specific indirection of libpthread functions

  Similar to 60cc1d3218fc for NetBSD, add aliases and interceptors for the
  following pthread related functions:

  - pthread_cond_init(3)
  - pthread_cond_destroy(3)
  - pthread_cond_signal(3)
  - pthread_cond_broadcast(3)
  - pthread_cond_wait(3)
  - pthread_mutex_init(3)
  - pthread_mutex_destroy(3)
  - pthread_mutex_lock(3)
  - pthread_mutex_trylock(3)
  - pthread_mutex_unlock(3)
  - pthread_rwlock_init(3)
  - pthread_rwlock_destroy(3)
  - pthread_rwlock_rdlock(3)
  - pthread_rwlock_tryrdlock(3)
  - pthread_rwlock_wrlock(3)
  - pthread_rwlock_trywrlock(3)
  - pthread_rwlock_unlock(3)
  - pthread_once(3)
  - pthread_sigmask(3)

  In FreeBSD's libc, a number of internal aliases of the pthread functions
  are invoked, typically with an additional prefixed underscore, e.g.
  _pthread_cond_init() and so on.

  ThreadSanitizer needs to intercept these aliases too, otherwise some
  false positive reports about data races might be produced.

  Reviewed By: dvyukov

  Differential Revision: https://reviews.llvm.org/D119034

MFC after:	3 days

(cherry picked from commit 1c21bfb1b1a368f9833b9fb84ed323eeb58c5d4c)

2 files changed, 65 insertions, 12 deletions

diff --git a/contrib/llvm-project/compiler-rt/lib/tsan/rtl/tsan_interceptors.h b/contrib/llvm-project/compiler-rt/lib/tsan/rtl/tsan_interceptors.h
index c5716f53a323..344fa86ba85e 100644
--- a/contrib/llvm-project/compiler-rt/lib/tsan/rtl/tsan_interceptors.h
+++ b/contrib/llvm-project/compiler-rt/lib/tsan/rtl/tsan_interceptors.h
@@ -57,6 +57,14 @@ inline bool in_symbolizer() {
 
 #define TSAN_INTERCEPTOR(ret, func, ...) INTERCEPTOR(ret, func, __VA_ARGS__)
 
+#if SANITIZER_FREEBSD
+#  define TSAN_INTERCEPTOR_FREEBSD_ALIAS(ret, func, ...) \
+    TSAN_INTERCEPTOR(ret, _pthread_##func, __VA_ARGS__)  \
+    ALIAS(WRAPPER_NAME(pthread_##func));
+#else
+#  define TSAN_INTERCEPTOR_FREEBSD_ALIAS(ret, func, ...)
+#endif
+
 #if SANITIZER_NETBSD
 # define TSAN_INTERCEPTOR_NETBSD_ALIAS(ret, func, ...) \
   TSAN_INTERCEPTOR(ret, __libc_##func, __VA_ARGS__) \
diff --git a/contrib/llvm-project/compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp b/contrib/llvm-project/compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp
index dd2442842795..d6c13696edac 100644
--- a/contrib/llvm-project/compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp
+++ b/contrib/llvm-project/compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp
@@ -292,20 +292,25 @@ void ScopedInterceptor::DisableIgnores() {
 }
 
 #define TSAN_INTERCEPT(func) INTERCEPT_FUNCTION(func)
+#if SANITIZER_FREEBSD || SANITIZER_NETBSD
+#  define TSAN_INTERCEPT_VER(func, ver) INTERCEPT_FUNCTION(func)
+#else
+#  define TSAN_INTERCEPT_VER(func, ver) INTERCEPT_FUNCTION_VER(func, ver)
+#endif
 #if SANITIZER_FREEBSD
-# define TSAN_INTERCEPT_VER(func, ver) INTERCEPT_FUNCTION(func)
-# define TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS(func)
-# define TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS_THR(func)
-#elif SANITIZER_NETBSD
-# define TSAN_INTERCEPT_VER(func, ver) INTERCEPT_FUNCTION(func)
-# define TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS(func) \
-         INTERCEPT_FUNCTION(__libc_##func)
-# define TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS_THR(func) \
-         INTERCEPT_FUNCTION(__libc_thr_##func)
+#  define TSAN_MAYBE_INTERCEPT_FREEBSD_ALIAS(func) \
+    INTERCEPT_FUNCTION(_pthread_##func)
 #else
-# define TSAN_INTERCEPT_VER(func, ver) INTERCEPT_FUNCTION_VER(func, ver)
-# define TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS(func)
-# define TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS_THR(func)
+#  define TSAN_MAYBE_INTERCEPT_FREEBSD_ALIAS(func)
+#endif
+#if SANITIZER_NETBSD
+#  define TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS(func) \
+    INTERCEPT_FUNCTION(__libc_##func)
+#  define TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS_THR(func) \
+    INTERCEPT_FUNCTION(__libc_thr_##func)
+#else
+#  define TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS(func)
+#  define TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS_THR(func)
 #endif
 
 #define READ_STRING_OF_LEN(thr, pc, s, len, n)                 \
@@ -2653,6 +2658,26 @@ TSAN_INTERCEPTOR(void, thr_exit, tid_t *state) {
 #define TSAN_MAYBE_INTERCEPT_THR_EXIT
 #endif
 
+TSAN_INTERCEPTOR_FREEBSD_ALIAS(int, cond_init, void *c, void *a)
+TSAN_INTERCEPTOR_FREEBSD_ALIAS(int, cond_destroy, void *c)
+TSAN_INTERCEPTOR_FREEBSD_ALIAS(int, cond_signal, void *c)
+TSAN_INTERCEPTOR_FREEBSD_ALIAS(int, cond_broadcast, void *c)
+TSAN_INTERCEPTOR_FREEBSD_ALIAS(int, cond_wait, void *c, void *m)
+TSAN_INTERCEPTOR_FREEBSD_ALIAS(int, mutex_init, void *m, void *a)
+TSAN_INTERCEPTOR_FREEBSD_ALIAS(int, mutex_destroy, void *m)
+TSAN_INTERCEPTOR_FREEBSD_ALIAS(int, mutex_lock, void *m)
+TSAN_INTERCEPTOR_FREEBSD_ALIAS(int, mutex_trylock, void *m)
+TSAN_INTERCEPTOR_FREEBSD_ALIAS(int, mutex_unlock, void *m)
+TSAN_INTERCEPTOR_FREEBSD_ALIAS(int, rwlock_init, void *l, void *a)
+TSAN_INTERCEPTOR_FREEBSD_ALIAS(int, rwlock_destroy, void *l)
+TSAN_INTERCEPTOR_FREEBSD_ALIAS(int, rwlock_rdlock, void *l)
+TSAN_INTERCEPTOR_FREEBSD_ALIAS(int, rwlock_tryrdlock, void *l)
+TSAN_INTERCEPTOR_FREEBSD_ALIAS(int, rwlock_wrlock, void *l)
+TSAN_INTERCEPTOR_FREEBSD_ALIAS(int, rwlock_trywrlock, void *l)
+TSAN_INTERCEPTOR_FREEBSD_ALIAS(int, rwlock_unlock, void *l)
+TSAN_INTERCEPTOR_FREEBSD_ALIAS(int, once, void *o, void (*i)())
+TSAN_INTERCEPTOR_FREEBSD_ALIAS(int, sigmask, int f, void *n, void *o)
+
 TSAN_INTERCEPTOR_NETBSD_ALIAS(int, cond_init, void *c, void *a)
 TSAN_INTERCEPTOR_NETBSD_ALIAS(int, cond_signal, void *c)
 TSAN_INTERCEPTOR_NETBSD_ALIAS(int, cond_broadcast, void *c)
@@ -2884,6 +2909,26 @@ void InitializeInterceptors() {
   }
 #endif
 
+  TSAN_MAYBE_INTERCEPT_FREEBSD_ALIAS(cond_init);
+  TSAN_MAYBE_INTERCEPT_FREEBSD_ALIAS(cond_destroy);
+  TSAN_MAYBE_INTERCEPT_FREEBSD_ALIAS(cond_signal);
+  TSAN_MAYBE_INTERCEPT_FREEBSD_ALIAS(cond_broadcast);
+  TSAN_MAYBE_INTERCEPT_FREEBSD_ALIAS(cond_wait);
+  TSAN_MAYBE_INTERCEPT_FREEBSD_ALIAS(mutex_init);
+  TSAN_MAYBE_INTERCEPT_FREEBSD_ALIAS(mutex_destroy);
+  TSAN_MAYBE_INTERCEPT_FREEBSD_ALIAS(mutex_lock);
+  TSAN_MAYBE_INTERCEPT_FREEBSD_ALIAS(mutex_trylock);
+  TSAN_MAYBE_INTERCEPT_FREEBSD_ALIAS(mutex_unlock);
+  TSAN_MAYBE_INTERCEPT_FREEBSD_ALIAS(rwlock_init);
+  TSAN_MAYBE_INTERCEPT_FREEBSD_ALIAS(rwlock_destroy);
+  TSAN_MAYBE_INTERCEPT_FREEBSD_ALIAS(rwlock_rdlock);
+  TSAN_MAYBE_INTERCEPT_FREEBSD_ALIAS(rwlock_tryrdlock);
+  TSAN_MAYBE_INTERCEPT_FREEBSD_ALIAS(rwlock_wrlock);
+  TSAN_MAYBE_INTERCEPT_FREEBSD_ALIAS(rwlock_trywrlock);
+  TSAN_MAYBE_INTERCEPT_FREEBSD_ALIAS(rwlock_unlock);
+  TSAN_MAYBE_INTERCEPT_FREEBSD_ALIAS(once);
+  TSAN_MAYBE_INTERCEPT_FREEBSD_ALIAS(sigmask);
+
   TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS(cond_init);
   TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS(cond_signal);
   TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS(cond_broadcast);