forked from OSchip/llvm-project
85 lines
2.5 KiB
C++
85 lines
2.5 KiB
C++
//==- BlockCounter.h - ADT for counting block visits -------------*- C++ -*-//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines BlockCounter, an abstract data type used to count
|
|
// the number of times a given block has been visited along a path
|
|
// analyzed by CoreEngine.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "clang/StaticAnalyzer/Core/PathSensitive/BlockCounter.h"
|
|
#include "llvm/ADT/ImmutableMap.h"
|
|
|
|
using namespace clang;
|
|
using namespace ento;
|
|
|
|
namespace {
|
|
|
|
class CountKey {
|
|
const StackFrameContext *CallSite;
|
|
unsigned BlockID;
|
|
|
|
public:
|
|
CountKey(const StackFrameContext *CS, unsigned ID)
|
|
: CallSite(CS), BlockID(ID) {}
|
|
|
|
bool operator==(const CountKey &RHS) const {
|
|
return (CallSite == RHS.CallSite) && (BlockID == RHS.BlockID);
|
|
}
|
|
|
|
bool operator<(const CountKey &RHS) const {
|
|
return std::tie(CallSite, BlockID) < std::tie(RHS.CallSite, RHS.BlockID);
|
|
}
|
|
|
|
void Profile(llvm::FoldingSetNodeID &ID) const {
|
|
ID.AddPointer(CallSite);
|
|
ID.AddInteger(BlockID);
|
|
}
|
|
};
|
|
|
|
}
|
|
|
|
typedef llvm::ImmutableMap<CountKey, unsigned> CountMap;
|
|
|
|
static inline CountMap GetMap(void *D) {
|
|
return CountMap(static_cast<CountMap::TreeTy*>(D));
|
|
}
|
|
|
|
static inline CountMap::Factory& GetFactory(void *F) {
|
|
return *static_cast<CountMap::Factory*>(F);
|
|
}
|
|
|
|
unsigned BlockCounter::getNumVisited(const StackFrameContext *CallSite,
|
|
unsigned BlockID) const {
|
|
CountMap M = GetMap(Data);
|
|
CountMap::data_type* T = M.lookup(CountKey(CallSite, BlockID));
|
|
return T ? *T : 0;
|
|
}
|
|
|
|
BlockCounter::Factory::Factory(llvm::BumpPtrAllocator& Alloc) {
|
|
F = new CountMap::Factory(Alloc);
|
|
}
|
|
|
|
BlockCounter::Factory::~Factory() {
|
|
delete static_cast<CountMap::Factory*>(F);
|
|
}
|
|
|
|
BlockCounter
|
|
BlockCounter::Factory::IncrementCount(BlockCounter BC,
|
|
const StackFrameContext *CallSite,
|
|
unsigned BlockID) {
|
|
return BlockCounter(GetFactory(F).add(GetMap(BC.Data),
|
|
CountKey(CallSite, BlockID),
|
|
BC.getNumVisited(CallSite, BlockID)+1).getRoot());
|
|
}
|
|
|
|
BlockCounter
|
|
BlockCounter::Factory::GetEmptyCounter() {
|
|
return BlockCounter(GetFactory(F).getEmptyMap().getRoot());
|
|
}
|