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180 lines
7.5 KiB
C
180 lines
7.5 KiB
C
/* Copyright (c) 2008-2009, Google Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* ---
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* Author: Kostya Serebryany
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*/
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#ifdef __cplusplus
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# error "This file should be built as pure C to avoid name mangling"
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#endif
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#include "config.h"
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#include <stdlib.h>
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#include <string.h>
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#include "base/dynamic_annotations.h"
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#include "getenv_safe.h" // for TCMallocGetenvSafe
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#ifdef __GNUC__
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/* valgrind.h uses gcc extensions so it won't build with other compilers */
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# ifdef HAVE_VALGRIND_H /* prefer the user's copy if they have it */
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# include <valgrind.h>
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# else /* otherwise just use the copy that we have */
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# include "third_party/valgrind.h"
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# endif
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#endif
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/* Compiler-based ThreadSanitizer defines
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DYNAMIC_ANNOTATIONS_EXTERNAL_IMPL = 1
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and provides its own definitions of the functions. */
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#ifndef DYNAMIC_ANNOTATIONS_EXTERNAL_IMPL
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# define DYNAMIC_ANNOTATIONS_EXTERNAL_IMPL 0
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#endif
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/* Each function is empty and called (via a macro) only in debug mode.
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The arguments are captured by dynamic tools at runtime. */
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#if DYNAMIC_ANNOTATIONS_ENABLED == 1 \
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&& DYNAMIC_ANNOTATIONS_EXTERNAL_IMPL == 0
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void AnnotateRWLockCreate(const char *file, int line,
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const volatile void *lock){}
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void AnnotateRWLockDestroy(const char *file, int line,
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const volatile void *lock){}
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void AnnotateRWLockAcquired(const char *file, int line,
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const volatile void *lock, long is_w){}
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void AnnotateRWLockReleased(const char *file, int line,
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const volatile void *lock, long is_w){}
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void AnnotateBarrierInit(const char *file, int line,
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const volatile void *barrier, long count,
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long reinitialization_allowed) {}
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void AnnotateBarrierWaitBefore(const char *file, int line,
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const volatile void *barrier) {}
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void AnnotateBarrierWaitAfter(const char *file, int line,
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const volatile void *barrier) {}
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void AnnotateBarrierDestroy(const char *file, int line,
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const volatile void *barrier) {}
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void AnnotateCondVarWait(const char *file, int line,
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const volatile void *cv,
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const volatile void *lock){}
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void AnnotateCondVarSignal(const char *file, int line,
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const volatile void *cv){}
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void AnnotateCondVarSignalAll(const char *file, int line,
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const volatile void *cv){}
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void AnnotatePublishMemoryRange(const char *file, int line,
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const volatile void *address,
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long size){}
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void AnnotateUnpublishMemoryRange(const char *file, int line,
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const volatile void *address,
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long size){}
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void AnnotatePCQCreate(const char *file, int line,
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const volatile void *pcq){}
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void AnnotatePCQDestroy(const char *file, int line,
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const volatile void *pcq){}
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void AnnotatePCQPut(const char *file, int line,
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const volatile void *pcq){}
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void AnnotatePCQGet(const char *file, int line,
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const volatile void *pcq){}
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void AnnotateNewMemory(const char *file, int line,
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const volatile void *mem,
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long size){}
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void AnnotateExpectRace(const char *file, int line,
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const volatile void *mem,
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const char *description){}
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void AnnotateBenignRace(const char *file, int line,
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const volatile void *mem,
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const char *description){}
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void AnnotateBenignRaceSized(const char *file, int line,
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const volatile void *mem,
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long size,
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const char *description) {}
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void AnnotateMutexIsUsedAsCondVar(const char *file, int line,
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const volatile void *mu){}
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void AnnotateTraceMemory(const char *file, int line,
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const volatile void *arg){}
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void AnnotateThreadName(const char *file, int line,
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const char *name){}
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void AnnotateIgnoreReadsBegin(const char *file, int line){}
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void AnnotateIgnoreReadsEnd(const char *file, int line){}
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void AnnotateIgnoreWritesBegin(const char *file, int line){}
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void AnnotateIgnoreWritesEnd(const char *file, int line){}
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void AnnotateEnableRaceDetection(const char *file, int line, int enable){}
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void AnnotateNoOp(const char *file, int line,
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const volatile void *arg){}
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void AnnotateFlushState(const char *file, int line){}
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#endif /* DYNAMIC_ANNOTATIONS_ENABLED == 1
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&& DYNAMIC_ANNOTATIONS_EXTERNAL_IMPL == 0 */
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#if DYNAMIC_ANNOTATIONS_EXTERNAL_IMPL == 0
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static int GetRunningOnValgrind(void) {
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#ifdef RUNNING_ON_VALGRIND
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if (RUNNING_ON_VALGRIND) return 1;
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#endif
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const char *running_on_valgrind_str = TCMallocGetenvSafe("RUNNING_ON_VALGRIND");
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if (running_on_valgrind_str) {
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return strcmp(running_on_valgrind_str, "0") != 0;
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}
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return 0;
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}
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/* See the comments in dynamic_annotations.h */
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int RunningOnValgrind(void) {
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static volatile int running_on_valgrind = -1;
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int local_running_on_valgrind = running_on_valgrind;
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/* C doesn't have thread-safe initialization of statics, and we
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don't want to depend on pthread_once here, so hack it. */
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ANNOTATE_BENIGN_RACE(&running_on_valgrind, "safe hack");
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if (local_running_on_valgrind == -1)
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running_on_valgrind = local_running_on_valgrind = GetRunningOnValgrind();
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return local_running_on_valgrind;
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}
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#endif /* DYNAMIC_ANNOTATIONS_EXTERNAL_IMPL == 0 */
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/* See the comments in dynamic_annotations.h */
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double ValgrindSlowdown(void) {
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/* Same initialization hack as in RunningOnValgrind(). */
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static volatile double slowdown = 0.0;
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double local_slowdown = slowdown;
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ANNOTATE_BENIGN_RACE(&slowdown, "safe hack");
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if (RunningOnValgrind() == 0) {
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return 1.0;
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}
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if (local_slowdown == 0.0) {
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char *env = getenv("VALGRIND_SLOWDOWN");
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slowdown = local_slowdown = env ? atof(env) : 50.0;
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}
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return local_slowdown;
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}
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