forked from OSchip/llvm-project
87 lines
2.5 KiB
C++
87 lines
2.5 KiB
C++
//==- BlockCounter.h - ADT for counting block visits -------------*- 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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// This file defines BlockCounter, an abstract data type used to count
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// the number of times a given block has been visited along a path
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// analyzed by CoreEngine.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/StaticAnalyzer/Core/PathSensitive/BlockCounter.h"
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#include "llvm/ADT/ImmutableMap.h"
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using namespace clang;
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using namespace ento;
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namespace {
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class CountKey {
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const StackFrameContext *CallSite;
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unsigned BlockID;
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public:
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CountKey(const StackFrameContext *CS, unsigned ID)
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: CallSite(CS), BlockID(ID) {}
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bool operator==(const CountKey &RHS) const {
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return (CallSite == RHS.CallSite) && (BlockID == RHS.BlockID);
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}
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bool operator<(const CountKey &RHS) const {
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return (CallSite == RHS.CallSite) ? (BlockID < RHS.BlockID)
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: (CallSite < RHS.CallSite);
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}
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void Profile(llvm::FoldingSetNodeID &ID) const {
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ID.AddPointer(CallSite);
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ID.AddInteger(BlockID);
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}
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};
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}
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typedef llvm::ImmutableMap<CountKey, unsigned> CountMap;
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static inline CountMap GetMap(void* D) {
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return CountMap(static_cast<CountMap::TreeTy*>(D));
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}
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static inline CountMap::Factory& GetFactory(void* F) {
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return *static_cast<CountMap::Factory*>(F);
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}
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unsigned BlockCounter::getNumVisited(const StackFrameContext *CallSite,
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unsigned BlockID) const {
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CountMap M = GetMap(Data);
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CountMap::data_type* T = M.lookup(CountKey(CallSite, BlockID));
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return T ? *T : 0;
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}
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BlockCounter::Factory::Factory(llvm::BumpPtrAllocator& Alloc) {
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F = new CountMap::Factory(Alloc);
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}
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BlockCounter::Factory::~Factory() {
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delete static_cast<CountMap::Factory*>(F);
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}
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BlockCounter
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BlockCounter::Factory::IncrementCount(BlockCounter BC,
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const StackFrameContext *CallSite,
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unsigned BlockID) {
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return BlockCounter(GetFactory(F).add(GetMap(BC.Data),
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CountKey(CallSite, BlockID),
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BC.getNumVisited(CallSite, BlockID)+1).getRoot());
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}
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BlockCounter
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BlockCounter::Factory::GetEmptyCounter() {
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return BlockCounter(GetFactory(F).getEmptyMap().getRoot());
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}
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