lib/VMCore/LeakDetector.cpp

   1 //===-- LeakDetector.cpp - Implement LeakDetector interface ---------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file implements the LeakDetector class.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "LLVMContextImpl.h"
  15 #include "llvm/Support/LeakDetector.h"
  16 #include "llvm/ADT/SmallPtrSet.h"
  17 #include "llvm/Support/Compiler.h"
  18 #include "llvm/Support/ManagedStatic.h"
  19 #include "llvm/Support/Streams.h"
  20 #include "llvm/System/Mutex.h"
  21 #include "llvm/System/Threading.h"
  22 #include "llvm/Value.h"
  23 using namespace llvm;
  24
  25 static ManagedStatic<sys::SmartMutex<true> > ObjectsLock;
  26 static ManagedStatic<LeakDetectorImpl<void> > Objects;
  27
  28 static void clearGarbage(LLVMContext &Context) {
  29   Objects->clear();
  30   Context.pImpl->LLVMObjects.clear();
  31 }
  32
  33 void LeakDetector::addGarbageObjectImpl(void *Object) {
  34   sys::SmartScopedLock<true> Lock(*ObjectsLock);
  35   Objects->addGarbage(Object);
  36 }
  37
  38 void LeakDetector::addGarbageObjectImpl(const Value *Object) {
  39   LLVMContextImpl *pImpl = Object->getContext().pImpl;
  40   sys::SmartScopedLock<true> Lock(pImpl->LLVMObjectsLock);
  41   pImpl->LLVMObjects.addGarbage(Object);
  42 }
  43
  44 void LeakDetector::removeGarbageObjectImpl(void *Object) {
  45   sys::SmartScopedLock<true> Lock(*ObjectsLock);
  46   Objects->removeGarbage(Object);
  47 }
  48
  49 void LeakDetector::removeGarbageObjectImpl(const Value *Object) {
  50   LLVMContextImpl *pImpl = Object->getContext().pImpl;
  51   sys::SmartScopedLock<true> Lock(pImpl->LLVMObjectsLock);
  52   pImpl->LLVMObjects.removeGarbage(Object);
  53 }
  54
  55 void LeakDetector::checkForGarbageImpl(LLVMContext &Context,
  56                                        const std::string &Message) {
  57   LLVMContextImpl *pImpl = Context.pImpl;
  58   sys::SmartScopedLock<true> Lock(*ObjectsLock);
  59   sys::SmartScopedLock<true> CLock(pImpl->LLVMObjectsLock);
  60
  61   Objects->setName("GENERIC");
  62   pImpl->LLVMObjects.setName("LLVM");
  63
  64   // use non-short-circuit version so that both checks are performed
  65   if (Objects->hasGarbage(Message) |
  66       pImpl->LLVMObjects.hasGarbage(Message))
  67     cerr << "\nThis is probably because you removed an object, but didn't "
  68          << "delete it.  Please check your code for memory leaks.\n";
  69
  70   // Clear out results so we don't get duplicate warnings on
  71   // next call...
  72   clearGarbage(Context);
  73 }