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91 lines
3.1 KiB
C++
91 lines
3.1 KiB
C++
//===-- LeakDetector.cpp - Implement LeakDetector interface ---------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the LeakDetector class.
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//
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//===----------------------------------------------------------------------===//
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#include "Support/LeakDetector.h"
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#include "llvm/Value.h"
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#include <set>
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using namespace llvm;
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// Lazily allocate set so that release build doesn't have to do anything.
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static std::set<const void*> *Objects = 0;
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static std::set<const Value*> *LLVMObjects = 0;
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// Because the most common usage pattern, by far, is to add a garbage object,
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// then remove it immediately, we optimize this case. When an object is added,
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// it is not added to the set immediately, it is added to the CachedValue Value.
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// If it is immediately removed, no set search need be performed.
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//
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static const Value *CachedValue;
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void LeakDetector::addGarbageObjectImpl(void *Object) {
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if (Objects == 0)
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Objects = new std::set<const void*>();
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assert(Objects->count(Object) == 0 && "Object already in set!");
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Objects->insert(Object);
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}
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void LeakDetector::removeGarbageObjectImpl(void *Object) {
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if (Objects)
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Objects->erase(Object);
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}
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void LeakDetector::addGarbageObjectImpl(const Value *Object) {
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if (CachedValue) {
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if (LLVMObjects == 0)
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LLVMObjects = new std::set<const Value*>();
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assert(LLVMObjects->count(CachedValue) == 0 && "Object already in set!");
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LLVMObjects->insert(CachedValue);
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}
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CachedValue = Object;
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}
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void LeakDetector::removeGarbageObjectImpl(const Value *Object) {
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if (Object == CachedValue)
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CachedValue = 0; // Cache hit!
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else if (LLVMObjects)
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LLVMObjects->erase(Object);
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}
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void LeakDetector::checkForGarbageImpl(const std::string &Message) {
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if (CachedValue) // Flush the cache to the set...
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addGarbageObjectImpl((Value*)0);
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assert(CachedValue == 0 && "No value should be cached anymore!");
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if ((Objects && !Objects->empty()) || (LLVMObjects && !LLVMObjects->empty())){
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std::cerr << "Leaked objects found: " << Message << "\n";
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if (Objects && !Objects->empty()) {
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std::cerr << " Non-Value objects leaked:";
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for (std::set<const void*>::iterator I = Objects->begin(),
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E = Objects->end(); I != E; ++I)
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std::cerr << " " << *I;
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}
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if (LLVMObjects && !LLVMObjects->empty()) {
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std::cerr << " LLVM Value subclasses leaked:";
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for (std::set<const Value*>::iterator I = LLVMObjects->begin(),
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E = LLVMObjects->end(); I != E; ++I)
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std::cerr << **I << "\n";
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}
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std::cerr << "This is probably because you removed an LLVM value "
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<< "(Instruction, BasicBlock, \netc), but didn't delete it. "
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<< "Please check your code for memory leaks.\n";
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// Clear out results so we don't get duplicate warnings on next call...
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delete Objects; delete LLVMObjects;
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Objects = 0; LLVMObjects = 0;
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}
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}
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