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76 lines
2.7 KiB
C++
76 lines
2.7 KiB
C++
//===- llvm/Support/Valgrind.h - Communication with Valgrind -----*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Methods for communicating with a valgrind instance this program is running
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// under. These are all no-ops unless LLVM was configured on a system with the
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// valgrind headers installed and valgrind is controlling this process.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_VALGRIND_H
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#define LLVM_SUPPORT_VALGRIND_H
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#include "llvm/Config/llvm-config.h"
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#include "llvm/Support/Compiler.h"
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#include <stddef.h>
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#if LLVM_ENABLE_THREADS != 0 && !defined(NDEBUG)
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// tsan (Thread Sanitizer) is a valgrind-based tool that detects these exact
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// functions by name.
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extern "C" {
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LLVM_ATTRIBUTE_WEAK void AnnotateHappensAfter(const char *file, int line,
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const volatile void *cv);
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LLVM_ATTRIBUTE_WEAK void AnnotateHappensBefore(const char *file, int line,
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const volatile void *cv);
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LLVM_ATTRIBUTE_WEAK void AnnotateIgnoreWritesBegin(const char *file, int line);
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LLVM_ATTRIBUTE_WEAK void AnnotateIgnoreWritesEnd(const char *file, int line);
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}
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#endif
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namespace llvm {
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namespace sys {
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// True if Valgrind is controlling this process.
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bool RunningOnValgrind();
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// Discard valgrind's translation of code in the range [Addr .. Addr + Len).
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// Otherwise valgrind may continue to execute the old version of the code.
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void ValgrindDiscardTranslations(const void *Addr, size_t Len);
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#if LLVM_ENABLE_THREADS != 0 && !defined(NDEBUG)
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// Thread Sanitizer is a valgrind tool that finds races in code.
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// See http://code.google.com/p/data-race-test/wiki/DynamicAnnotations .
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// This marker is used to define a happens-before arc. The race detector will
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// infer an arc from the begin to the end when they share the same pointer
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// argument.
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#define TsanHappensBefore(cv) \
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AnnotateHappensBefore(__FILE__, __LINE__, cv)
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// This marker defines the destination of a happens-before arc.
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#define TsanHappensAfter(cv) \
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AnnotateHappensAfter(__FILE__, __LINE__, cv)
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// Ignore any races on writes between here and the next TsanIgnoreWritesEnd.
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#define TsanIgnoreWritesBegin() \
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AnnotateIgnoreWritesBegin(__FILE__, __LINE__)
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// Resume checking for racy writes.
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#define TsanIgnoreWritesEnd() \
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AnnotateIgnoreWritesEnd(__FILE__, __LINE__)
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#else
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#define TsanHappensBefore(cv)
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#define TsanHappensAfter(cv)
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#define TsanIgnoreWritesBegin()
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#define TsanIgnoreWritesEnd()
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#endif
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}
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}
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#endif
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