c3d79f7c07
When stepping, it's necessary to use both the unaltered relative pc and the adjusted relative pc. If the adjusted pc is not used, the wrong unwind information can be used. Added new offline unit tests that take real data and verifies that it unwinds properly. Fix a bug in the map code that would not properly parse map data for a 64 bit process when done in a 32 bit process. Fix bug in eh_frame processing that didn't adjust the pc correctly. Fix unit tests related to the pc adjustment. Bug: 69475565 Test: Passes libbacktrace/libunwindstack unit tests. Test: Run debuggerd -b on processes on a hikey. Change-Id: Ic501a1c4549c5f61d2742a7105c42a960f2c892b
93 lines
2.4 KiB
C++
93 lines
2.4 KiB
C++
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _LIBUNWINDSTACK_ELF_H
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#define _LIBUNWINDSTACK_ELF_H
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#include <stddef.h>
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#include <memory>
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#include <mutex>
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#include <string>
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#include <unwindstack/ElfInterface.h>
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#include <unwindstack/Memory.h>
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#if !defined(EM_AARCH64)
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#define EM_AARCH64 183
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#endif
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namespace unwindstack {
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// Forward declaration.
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struct MapInfo;
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class Regs;
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class Elf {
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public:
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Elf(Memory* memory) : memory_(memory) {}
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virtual ~Elf() = default;
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bool Init(bool init_gnu_debugdata);
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void InitGnuDebugdata();
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bool GetSoname(std::string* name);
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bool GetFunctionName(uint64_t addr, std::string* name, uint64_t* func_offset);
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uint64_t GetRelPc(uint64_t pc, const MapInfo* map_info);
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bool Step(uint64_t rel_pc, uint64_t adjusted_rel_pc, uint64_t elf_offset, Regs* regs,
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Memory* process_memory, bool* finished);
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ElfInterface* CreateInterfaceFromMemory(Memory* memory);
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uint64_t GetLoadBias() { return load_bias_; }
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bool valid() { return valid_; }
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uint32_t machine_type() { return machine_type_; }
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uint8_t class_type() { return class_type_; }
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Memory* memory() { return memory_.get(); }
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ElfInterface* interface() { return interface_.get(); }
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ElfInterface* gnu_debugdata_interface() { return gnu_debugdata_interface_.get(); }
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static bool IsValidElf(Memory* memory);
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static void GetInfo(Memory* memory, bool* valid, uint64_t* size);
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protected:
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bool valid_ = false;
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uint64_t load_bias_ = 0;
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std::unique_ptr<ElfInterface> interface_;
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std::unique_ptr<Memory> memory_;
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uint32_t machine_type_;
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uint8_t class_type_;
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// Protect calls that can modify internal state of the interface object.
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std::mutex lock_;
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std::unique_ptr<Memory> gnu_debugdata_memory_;
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std::unique_ptr<ElfInterface> gnu_debugdata_interface_;
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};
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} // namespace unwindstack
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#endif // _LIBUNWINDSTACK_ELF_H
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