Merge the dynamic annotations from ThreadSanitizer r3424.

base/third_party/dynamic_annotations/dynamic_annotations.c

-/* Copyright (c) 2008-2009, Google Inc.
+/* Copyright (c) 2011, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Neither the name of Google Inc. nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * ---
- * Author: Kostya Serebryany
  */
 
 #ifdef _MSC_VER
 # include <windows.h>
 #endif
 
 #ifdef __cplusplus
 # error "This file should be built as pure C to avoid name mangling"
 #endif
 
 #include <stdlib.h>
 #include <string.h>
 
 #include "base/third_party/dynamic_annotations/dynamic_annotations.h"
 
 #ifdef __GNUC__
 /* valgrind.h uses gcc extensions so it won't build with other compilers */
 # include "base/third_party/valgrind/valgrind.h"
 #endif
 
 /* Each function is empty and called (via a macro) only in debug mode.
    The arguments are captured by dynamic tools at runtime. */
 
 #if DYNAMIC_ANNOTATIONS_ENABLED == 1
 
+/* Identical code folding(-Wl,--icf=all) countermeasures.
+   This makes all Annotate* functions different, which prevents the linker from
+   folding them. */
+#ifdef __COUNTER__
+#define DYNAMIC_ANNOTATIONS_IMPL \
+  volatile short lineno = (__LINE__ << 8) + __COUNTER__; (void)lineno;
+#else
+#define DYNAMIC_ANNOTATIONS_IMPL \
+  volatile short lineno = (__LINE__ << 8); (void)lineno;
+#endif
+
+/* WARNING: always add new annotations to the end of the list.
+   Otherwise, lineno (see above) numbers for different Annotate* functions may
+   conflict. */
 void DYNAMIC_ANNOTATIONS_NAME(AnnotateRWLockCreate)(
-    const char *file, int line, const volatile void *lock){}
+    const char *file, int line, const volatile void *lock)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotateRWLockDestroy)(
-    const char *file, int line, const volatile void *lock){}
+    const char *file, int line, const volatile void *lock)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotateRWLockAcquired)(
-    const char *file, int line, const volatile void *lock, long is_w){}
+    const char *file, int line, const volatile void *lock, long is_w)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotateRWLockReleased)(
-    const char *file, int line, const volatile void *lock, long is_w){}
+    const char *file, int line, const volatile void *lock, long is_w)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotateBarrierInit)(
     const char *file, int line, const volatile void *barrier, long count,
-    long reinitialization_allowed) {}
+    long reinitialization_allowed)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotateBarrierWaitBefore)(
-    const char *file, int line, const volatile void *barrier) {}
+    const char *file, int line, const volatile void *barrier)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotateBarrierWaitAfter)(
-    const char *file, int line, const volatile void *barrier) {}
+    const char *file, int line, const volatile void *barrier)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotateBarrierDestroy)(
-    const char *file, int line, const volatile void *barrier) {}
+    const char *file, int line, const volatile void *barrier)
+{DYNAMIC_ANNOTATIONS_IMPL}
 
 void DYNAMIC_ANNOTATIONS_NAME(AnnotateCondVarWait)(
     const char *file, int line, const volatile void *cv,
-    const volatile void *lock){}
+    const volatile void *lock)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotateCondVarSignal)(
-    const char *file, int line, const volatile void *cv){}
+    const char *file, int line, const volatile void *cv)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotateCondVarSignalAll)(
-    const char *file, int line, const volatile void *cv){}
+    const char *file, int line, const volatile void *cv)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
+void DYNAMIC_ANNOTATIONS_NAME(AnnotateHappensBefore)(
+    const char *file, int line, const volatile void *obj)
+{DYNAMIC_ANNOTATIONS_IMPL};
+
+void DYNAMIC_ANNOTATIONS_NAME(AnnotateHappensAfter)(
+    const char *file, int line, const volatile void *obj)
+{DYNAMIC_ANNOTATIONS_IMPL};
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotatePublishMemoryRange)(
-    const char *file, int line, const volatile void *address, long size){}
+    const char *file, int line, const volatile void *address, long size)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotateUnpublishMemoryRange)(
-    const char *file, int line, const volatile void *address, long size){}
+    const char *file, int line, const volatile void *address, long size)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotatePCQCreate)(
-    const char *file, int line, const volatile void *pcq){}
+    const char *file, int line, const volatile void *pcq)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotatePCQDestroy)(
-    const char *file, int line, const volatile void *pcq){}
+    const char *file, int line, const volatile void *pcq)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotatePCQPut)(
-    const char *file, int line, const volatile void *pcq){}
+    const char *file, int line, const volatile void *pcq)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotatePCQGet)(
-    const char *file, int line, const volatile void *pcq){}
+    const char *file, int line, const volatile void *pcq)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotateNewMemory)(
-    const char *file, int line, const volatile void *mem, long size){}
+    const char *file, int line, const volatile void *mem, long size)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotateExpectRace)(
     const char *file, int line, const volatile void *mem,
-    const char *description){}
+    const char *description)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotateFlushExpectedRaces)(
-    const char *file, int line){}
+    const char *file, int line)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotateBenignRace)(
     const char *file, int line, const volatile void *mem,
-    const char *description){}
+    const char *description)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotateBenignRaceSized)(
     const char *file, int line, const volatile void *mem, long size,
-    const char *description){}
+    const char *description)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotateMutexIsUsedAsCondVar)(
-    const char *file, int line, const volatile void *mu){}
+    const char *file, int line, const volatile void *mu)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotateMutexIsNotPHB)(
-    const char *file, int line, const volatile void *mu){}
+    const char *file, int line, const volatile void *mu)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotateTraceMemory)(
-    const char *file, int line, const volatile void *arg){}
+    const char *file, int line, const volatile void *arg)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotateThreadName)(
-    const char *file, int line, const char *name){}
+    const char *file, int line, const char *name)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotateIgnoreReadsBegin)(
-    const char *file, int line){}
+    const char *file, int line)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotateIgnoreReadsEnd)(
-    const char *file, int line){}
+    const char *file, int line)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotateIgnoreWritesBegin)(
-    const char *file, int line){}
+    const char *file, int line)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotateIgnoreWritesEnd)(
-    const char *file, int line){}
+    const char *file, int line)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotateIgnoreSyncBegin)(
-    const char *file, int line){}
+    const char *file, int line)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotateIgnoreSyncEnd)(
-    const char *file, int line){}
+    const char *file, int line)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotateEnableRaceDetection)(
-    const char *file, int line, int enable){}
+    const char *file, int line, int enable)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotateNoOp)(
-    const char *file, int line, const volatile void *arg){}
+    const char *file, int line, const volatile void *arg)
+{DYNAMIC_ANNOTATIONS_IMPL}
+
 void DYNAMIC_ANNOTATIONS_NAME(AnnotateFlushState)(
-    const char *file, int line){}
+    const char *file, int line)
+{DYNAMIC_ANNOTATIONS_IMPL}
 
 #endif  /* DYNAMIC_ANNOTATIONS_ENABLED == 1 */
 
 #if DYNAMIC_ANNOTATIONS_PROVIDE_RUNNING_ON_VALGRIND == 1
 static int GetRunningOnValgrind(void) {
 #ifdef RUNNING_ON_VALGRIND
   if (RUNNING_ON_VALGRIND) return 1;
 #endif
 
 #ifndef _MSC_VER
@@ skipping 22 matching lines @@
   static volatile int running_on_valgrind = -1;
   /* C doesn't have thread-safe initialization of statics, and we
      don't want to depend on pthread_once here, so hack it. */
   int local_running_on_valgrind = running_on_valgrind;
   if (local_running_on_valgrind == -1)
     running_on_valgrind = local_running_on_valgrind = GetRunningOnValgrind();
   return local_running_on_valgrind;
 }
 
 #endif /* DYNAMIC_ANNOTATIONS_PROVIDE_RUNNING_ON_VALGRIND == 1 */