53a3c9b4ab
Bug: 23762183 Test: Ran new unit tests. Change-Id: Icca2a73c50d467718ba4ac41e1c8f541488620dd
137 lines
4 KiB
C++
137 lines
4 KiB
C++
/*
|
|
* Copyright (C) 2016 The Android Open Source Project
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef _LIBUNWINDSTACK_DWARF_SECTION_H
|
|
#define _LIBUNWINDSTACK_DWARF_SECTION_H
|
|
|
|
#include <stdint.h>
|
|
|
|
#include <iterator>
|
|
#include <unordered_map>
|
|
|
|
#include "DwarfError.h"
|
|
#include "DwarfLocation.h"
|
|
#include "DwarfMemory.h"
|
|
#include "DwarfStructs.h"
|
|
|
|
// Forward declarations.
|
|
class Memory;
|
|
class Regs;
|
|
|
|
class DwarfSection {
|
|
public:
|
|
DwarfSection(Memory* memory) : memory_(memory) {}
|
|
virtual ~DwarfSection() = default;
|
|
|
|
class iterator : public std::iterator<std::bidirectional_iterator_tag, DwarfFde*> {
|
|
public:
|
|
iterator(DwarfSection* section, size_t index) : section_(section), index_(index) {}
|
|
|
|
iterator& operator++() {
|
|
index_++;
|
|
return *this;
|
|
}
|
|
iterator& operator++(int increment) {
|
|
index_ += increment;
|
|
return *this;
|
|
}
|
|
iterator& operator--() {
|
|
index_--;
|
|
return *this;
|
|
}
|
|
iterator& operator--(int decrement) {
|
|
index_ -= decrement;
|
|
return *this;
|
|
}
|
|
|
|
bool operator==(const iterator& rhs) { return this->index_ == rhs.index_; }
|
|
bool operator!=(const iterator& rhs) { return this->index_ != rhs.index_; }
|
|
|
|
const DwarfFde* operator*() { return section_->GetFdeFromIndex(index_); }
|
|
|
|
private:
|
|
DwarfSection* section_ = nullptr;
|
|
size_t index_ = 0;
|
|
};
|
|
|
|
iterator begin() { return iterator(this, 0); }
|
|
iterator end() { return iterator(this, fde_count_); }
|
|
|
|
DwarfError last_error() { return last_error_; }
|
|
|
|
virtual bool Init(uint64_t offset, uint64_t size) = 0;
|
|
|
|
virtual bool Eval(const DwarfCie*, Memory*, const dwarf_loc_regs_t&, Regs*) = 0;
|
|
|
|
virtual bool GetFdeOffsetFromPc(uint64_t pc, uint64_t* fde_offset) = 0;
|
|
|
|
virtual bool Log(uint8_t indent, uint64_t pc, uint64_t load_bias, const DwarfFde* fde) = 0;
|
|
|
|
virtual const DwarfFde* GetFdeFromIndex(size_t index) = 0;
|
|
|
|
const DwarfFde* GetFdeFromPc(uint64_t pc);
|
|
|
|
virtual const DwarfFde* GetFdeFromOffset(uint64_t fde_offset) = 0;
|
|
|
|
virtual bool GetCfaLocationInfo(uint64_t pc, const DwarfFde* fde, dwarf_loc_regs_t* loc_regs) = 0;
|
|
|
|
virtual bool IsCie32(uint32_t value32) = 0;
|
|
|
|
virtual bool IsCie64(uint64_t value64) = 0;
|
|
|
|
virtual uint64_t GetCieOffsetFromFde32(uint32_t pointer) = 0;
|
|
|
|
virtual uint64_t GetCieOffsetFromFde64(uint64_t pointer) = 0;
|
|
|
|
virtual uint64_t AdjustPcFromFde(uint64_t pc) = 0;
|
|
|
|
bool Step(uint64_t pc, Regs* regs, Memory* process_memory);
|
|
|
|
protected:
|
|
DwarfMemory memory_;
|
|
DwarfError last_error_ = DWARF_ERROR_NONE;
|
|
|
|
uint64_t fde_count_;
|
|
std::unordered_map<uint64_t, DwarfFde> fde_entries_;
|
|
std::unordered_map<uint64_t, DwarfCie> cie_entries_;
|
|
std::unordered_map<uint64_t, dwarf_loc_regs_t> cie_loc_regs_;
|
|
};
|
|
|
|
template <typename AddressType>
|
|
class DwarfSectionImpl : public DwarfSection {
|
|
public:
|
|
DwarfSectionImpl(Memory* memory) : DwarfSection(memory) {}
|
|
virtual ~DwarfSectionImpl() = default;
|
|
|
|
bool Eval(const DwarfCie* cie, Memory* regular_memory, const dwarf_loc_regs_t& loc_regs,
|
|
Regs* regs) override;
|
|
|
|
const DwarfCie* GetCie(uint64_t offset);
|
|
bool FillInCie(DwarfCie* cie);
|
|
|
|
const DwarfFde* GetFdeFromOffset(uint64_t offset) override;
|
|
bool FillInFde(DwarfFde* fde);
|
|
|
|
bool GetCfaLocationInfo(uint64_t pc, const DwarfFde* fde, dwarf_loc_regs_t* loc_regs) override;
|
|
|
|
bool Log(uint8_t indent, uint64_t pc, uint64_t load_bias, const DwarfFde* fde) override;
|
|
|
|
protected:
|
|
bool EvalExpression(const DwarfLocation& loc, uint8_t version, Memory* regular_memory,
|
|
AddressType* value);
|
|
};
|
|
|
|
#endif // _LIBUNWINDSTACK_DWARF_SECTION_H
|