root/third_party/tcmalloc/vendor/src/base/dynamic_annotations.c

DEFINITIONS

1. AnnotateRWLockCreate
2. AnnotateRWLockDestroy
3. AnnotateRWLockAcquired
4. AnnotateRWLockReleased
5. AnnotateBarrierInit
6. AnnotateBarrierWaitBefore
7. AnnotateBarrierWaitAfter
8. AnnotateBarrierDestroy
9. AnnotateCondVarWait
10. AnnotateCondVarSignal
11. AnnotateCondVarSignalAll
12. AnnotatePublishMemoryRange
13. AnnotateUnpublishMemoryRange
14. AnnotatePCQCreate
15. AnnotatePCQDestroy
16. AnnotatePCQPut
17. AnnotatePCQGet
18. AnnotateNewMemory
19. AnnotateExpectRace
20. AnnotateBenignRace
21. AnnotateBenignRaceSized
22. AnnotateMutexIsUsedAsCondVar
23. AnnotateTraceMemory
24. AnnotateThreadName
25. AnnotateIgnoreReadsBegin
26. AnnotateIgnoreReadsEnd
27. AnnotateIgnoreWritesBegin
28. AnnotateIgnoreWritesEnd
29. AnnotateEnableRaceDetection
30. AnnotateNoOp
31. AnnotateFlushState
32. GetRunningOnValgrind
33. RunningOnValgrind
34. ValgrindSlowdown

/* Copyright (c) 2008-2009, 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.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * 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 __cplusplus
# error "This file should be built as pure C to avoid name mangling"
#endif

#include "config.h"
#include <stdlib.h>
#include <string.h>

#include "base/dynamic_annotations.h"

#ifdef __GNUC__
/* valgrind.h uses gcc extensions so it won't build with other compilers */
# ifdef HAVE_VALGRIND_H    /* prefer the user's copy if they have it */
#  include <valgrind.h>
# else                     /* otherwise just use the copy that we have */
#  include "third_party/valgrind.h"
# endif
#endif

/* Compiler-based ThreadSanitizer defines
   DYNAMIC_ANNOTATIONS_EXTERNAL_IMPL = 1
   and provides its own definitions of the functions. */

#ifndef DYNAMIC_ANNOTATIONS_EXTERNAL_IMPL
# define DYNAMIC_ANNOTATIONS_EXTERNAL_IMPL 0
#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 \
    && DYNAMIC_ANNOTATIONS_EXTERNAL_IMPL == 0

void AnnotateRWLockCreate(const char *file, int line,
                          const volatile void *lock){}
void AnnotateRWLockDestroy(const char *file, int line,
                           const volatile void *lock){}
void AnnotateRWLockAcquired(const char *file, int line,
                            const volatile void *lock, long is_w){}
void AnnotateRWLockReleased(const char *file, int line,
                            const volatile void *lock, long is_w){}
void AnnotateBarrierInit(const char *file, int line,
                         const volatile void *barrier, long count,
                         long reinitialization_allowed) {}
void AnnotateBarrierWaitBefore(const char *file, int line,
                               const volatile void *barrier) {}
void AnnotateBarrierWaitAfter(const char *file, int line,
                              const volatile void *barrier) {}
void AnnotateBarrierDestroy(const char *file, int line,
                            const volatile void *barrier) {}

void AnnotateCondVarWait(const char *file, int line,
                         const volatile void *cv,
                         const volatile void *lock){}
void AnnotateCondVarSignal(const char *file, int line,
                           const volatile void *cv){}
void AnnotateCondVarSignalAll(const char *file, int line,
                              const volatile void *cv){}
void AnnotatePublishMemoryRange(const char *file, int line,
                                const volatile void *address,
                                long size){}
void AnnotateUnpublishMemoryRange(const char *file, int line,
                                  const volatile void *address,
                                  long size){}
void AnnotatePCQCreate(const char *file, int line,
                       const volatile void *pcq){}
void AnnotatePCQDestroy(const char *file, int line,
                        const volatile void *pcq){}
void AnnotatePCQPut(const char *file, int line,
                    const volatile void *pcq){}
void AnnotatePCQGet(const char *file, int line,
                    const volatile void *pcq){}
void AnnotateNewMemory(const char *file, int line,
                       const volatile void *mem,
                       long size){}
void AnnotateExpectRace(const char *file, int line,
                        const volatile void *mem,
                        const char *description){}
void AnnotateBenignRace(const char *file, int line,
                        const volatile void *mem,
                        const char *description){}
void AnnotateBenignRaceSized(const char *file, int line,
                             const volatile void *mem,
                             long size,
                             const char *description) {}
void AnnotateMutexIsUsedAsCondVar(const char *file, int line,
                                  const volatile void *mu){}
void AnnotateTraceMemory(const char *file, int line,
                         const volatile void *arg){}
void AnnotateThreadName(const char *file, int line,
                        const char *name){}
void AnnotateIgnoreReadsBegin(const char *file, int line){}
void AnnotateIgnoreReadsEnd(const char *file, int line){}
void AnnotateIgnoreWritesBegin(const char *file, int line){}
void AnnotateIgnoreWritesEnd(const char *file, int line){}
void AnnotateEnableRaceDetection(const char *file, int line, int enable){}
void AnnotateNoOp(const char *file, int line,
                  const volatile void *arg){}
void AnnotateFlushState(const char *file, int line){}

#endif  /* DYNAMIC_ANNOTATIONS_ENABLED == 1
    && DYNAMIC_ANNOTATIONS_EXTERNAL_IMPL == 0 */

#if DYNAMIC_ANNOTATIONS_EXTERNAL_IMPL == 0

static int GetRunningOnValgrind(void) {
#ifdef RUNNING_ON_VALGRIND
  if (RUNNING_ON_VALGRIND) return 1;
#endif
#ifdef _MSC_VER
  /* Visual Studio can complain about getenv, so use a windows equivalent. */
  char value[100] = "1";    /* something that is not "0" */
  int res = GetEnvironmentVariableA("RUNNING_ON_VALGRIND",
                                    value, sizeof(value));
  /* value will remain "1" if the called failed for some reason. */
  return (res > 0 && strcmp(value, "0") != 0);
#else
  /* TODO(csilvers): use GetenvBeforeMain() instead?  Will need to
   *                 change it to be extern "C".
   */
  char *running_on_valgrind_str = getenv("RUNNING_ON_VALGRIND");
  if (running_on_valgrind_str) {
    return strcmp(running_on_valgrind_str, "0") != 0;
  }
  return 0;
#endif
}

/* See the comments in dynamic_annotations.h */
int RunningOnValgrind(void) {
  static volatile int running_on_valgrind = -1;
  int local_running_on_valgrind = running_on_valgrind;
  /* C doesn't have thread-safe initialization of statics, and we
     don't want to depend on pthread_once here, so hack it. */
  ANNOTATE_BENIGN_RACE(&running_on_valgrind, "safe hack");
  if (local_running_on_valgrind == -1)
    running_on_valgrind = local_running_on_valgrind = GetRunningOnValgrind();
  return local_running_on_valgrind;
}

#endif  /* DYNAMIC_ANNOTATIONS_EXTERNAL_IMPL == 0 */

/* See the comments in dynamic_annotations.h */
double ValgrindSlowdown(void) {
  /* Same initialization hack as in RunningOnValgrind(). */
  static volatile double slowdown = 0.0;
  double local_slowdown = slowdown;
  ANNOTATE_BENIGN_RACE(&slowdown, "safe hack");
  if (RunningOnValgrind() == 0) {
    return 1.0;
  }
  if (local_slowdown == 0.0) {
    char *env = getenv("VALGRIND_SLOWDOWN");
    slowdown = local_slowdown = env ? atof(env) : 50.0;
  }
  return local_slowdown;
}