/3rd_party/llvm/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/Mutex.h"
20#include "llvm/Support/Threading.h"
21#include "llvm/Value.h"
22using namespace llvm;
23
24static ManagedStatic<sys::SmartMutex<true> > ObjectsLock;
25static ManagedStatic<LeakDetectorImpl<void> > Objects;
26
27static void clearGarbage(LLVMContext &Context) {
28  Objects->clear();
29  Context.pImpl->LLVMObjects.clear();
30}
31
32void LeakDetector::addGarbageObjectImpl(void *Object) {
33  sys::SmartScopedLock<true> Lock(*ObjectsLock);
34  Objects->addGarbage(Object);
35}
36
37void LeakDetector::addGarbageObjectImpl(const Value *Object) {
38  LLVMContextImpl *pImpl = Object->getContext().pImpl;
39  pImpl->LLVMObjects.addGarbage(Object);
40}
41
42void LeakDetector::removeGarbageObjectImpl(void *Object) {
43  sys::SmartScopedLock<true> Lock(*ObjectsLock);
44  Objects->removeGarbage(Object);
45}
46
47void LeakDetector::removeGarbageObjectImpl(const Value *Object) {
48  LLVMContextImpl *pImpl = Object->getContext().pImpl;
49  pImpl->LLVMObjects.removeGarbage(Object);
50}
51
52void LeakDetector::checkForGarbageImpl(LLVMContext &Context, 
53                                       const std::string &Message) {
54  LLVMContextImpl *pImpl = Context.pImpl;
55  sys::SmartScopedLock<true> Lock(*ObjectsLock);
56  
57  Objects->setName("GENERIC");
58  pImpl->LLVMObjects.setName("LLVM");
59  
60  // use non-short-circuit version so that both checks are performed
61  if (Objects->hasGarbage(Message) |
62      pImpl->LLVMObjects.hasGarbage(Message))
63    errs() << "\nThis is probably because you removed an object, but didn't "
64           << "delete it.  Please check your code for memory leaks.\n";
65
66  // Clear out results so we don't get duplicate warnings on
67  // next call...
68  clearGarbage(Context);
69}