1 //===- LeaksContext.h - LeadDetector Implementation ------------*- C++ -*--===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines various helper methods and classes used by
11 // LLVMContextImpl for leaks detectors.
13 //===----------------------------------------------------------------------===//
15 #include "llvm/Value.h"
16 #include "llvm/ADT/SmallPtrSet.h"
21 static void print(const T* P) { errs() << P; }
25 struct PrinterTrait<Value> {
26 static void print(const Value* P) { errs() << *P; }
30 struct LeakDetectorImpl {
31 explicit LeakDetectorImpl(const char* const name = "") :
32 Cache(0), Name(name) { }
39 void setName(const char* n) {
43 // Because the most common usage pattern, by far, is to add a
44 // garbage object, then remove it immediately, we optimize this
45 // case. When an object is added, it is not added to the set
46 // immediately, it is added to the CachedValue Value. If it is
47 // immediately removed, no set search need be performed.
48 void addGarbage(const T* o) {
49 assert(Ts.count(o) == 0 && "Object already in set!");
51 assert(Cache != o && "Object already in set!");
57 void removeGarbage(const T* o) {
59 Cache = 0; // Cache hit
64 bool hasGarbage(const std::string& Message) {
65 addGarbage(0); // Flush the Cache
67 assert(Cache == 0 && "No value should be cached anymore!");
70 errs() << "Leaked " << Name << " objects found: " << Message << ":\n";
71 for (typename SmallPtrSet<const T*, 8>::iterator I = Ts.begin(),
72 E = Ts.end(); I != E; ++I) {
74 PrinterTrait<T>::print(*I);
86 SmallPtrSet<const T*, 8> Ts;