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// Copyright 2014 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Class to build a map from instruction address to its information.
#ifndef AUTOFDO_INSTRUCTION_MAP_H_
#define AUTOFDO_INSTRUCTION_MAP_H_
#include <map>
#include <string>
#include <utility>
#include "base/common.h"
#include "symbol_map.h"
namespace autofdo {
class SampleReader;
class Addr2line;
// InstructionMap stores all the disassembled instructions in
// the binary, and maps it to its information.
class InstructionMap {
public:
// Arguments:
// addr2line: addr2line class, used to get the source stack.
// symbol: the symbol map. This object is not const because
// we will update the file name of each symbol
// according to the debug info of each instruction.
InstructionMap(Addr2line *addr2line,
SymbolMap *symbol)
: symbol_map_(symbol), addr2line_(addr2line) {
}
// Deletes all the InstInfo, which was allocated in BuildInstMap.
~InstructionMap();
// Returns the size of the instruction map.
uint64 size() const {
return inst_map_.size();
}
// Builds instruction map for a function.
void BuildPerFunctionInstructionMap(const string &name, uint64 start_addr,
uint64 end_addr);
// Contains information about each instruction.
struct InstInfo {
const SourceInfo &source(int i) const {
DCHECK(i >= 0 && source_stack.size() > i);
return source_stack[i];
}
SourceStack source_stack;
};
typedef map<uint64, InstInfo *> InstMap;
const InstMap &inst_map() const {
return inst_map_;
}
private:
// A map from instruction address to its information.
InstMap inst_map_;
// A map from symbol name to symbol data.
SymbolMap *symbol_map_;
// Addr2line driver which is used to derive source stack.
Addr2line *addr2line_;
DISALLOW_COPY_AND_ASSIGN(InstructionMap);
};
} // namespace autofdo
#endif // AUTOFDO_INSTRUCTION_MAP_H_
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