b05c472421
This simplifies some of the logic and removes the need to pass an Arch value to functions that should already know about the arch it is operating on. Includes fixes for debuggerd/libbacktrace. Added new unit tests to cover new cases. Test: All unit tests pass. Test: Faked unwinder failing to verify debuggerd error messages display Test: properly in backtrace and tombstone. Change-Id: I439fcae0695befcfb1cb4c0a786cc74949d33425
118 lines
3.1 KiB
C++
118 lines
3.1 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_REGS_H
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#define _LIBUNWINDSTACK_REGS_H
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#include <stdint.h>
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#include <unistd.h>
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#include <functional>
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#include <string>
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#include <vector>
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#include <unwindstack/Arch.h>
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namespace unwindstack {
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// Forward declarations.
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class Elf;
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class Memory;
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class Regs {
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public:
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enum LocationEnum : uint8_t {
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LOCATION_UNKNOWN = 0,
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LOCATION_REGISTER,
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LOCATION_SP_OFFSET,
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};
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struct Location {
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Location(LocationEnum type, int16_t value) : type(type), value(value) {}
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LocationEnum type;
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int16_t value;
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};
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Regs(uint16_t total_regs, const Location& return_loc)
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: total_regs_(total_regs), return_loc_(return_loc) {}
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virtual ~Regs() = default;
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virtual ArchEnum Arch() = 0;
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bool Is32Bit() { return ArchIs32Bit(Arch()); }
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virtual void* RawData() = 0;
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virtual uint64_t pc() = 0;
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virtual uint64_t sp() = 0;
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virtual void set_pc(uint64_t pc) = 0;
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virtual void set_sp(uint64_t sp) = 0;
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uint64_t dex_pc() { return dex_pc_; }
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void set_dex_pc(uint64_t dex_pc) { dex_pc_ = dex_pc; }
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virtual void ResetPseudoRegisters() {}
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virtual bool SetPseudoRegister(uint16_t, uint64_t) { return false; }
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virtual bool GetPseudoRegister(uint16_t, uint64_t*) { return false; }
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virtual bool StepIfSignalHandler(uint64_t elf_offset, Elf* elf, Memory* process_memory) = 0;
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virtual bool SetPcFromReturnAddress(Memory* process_memory) = 0;
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virtual void IterateRegisters(std::function<void(const char*, uint64_t)>) = 0;
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uint16_t total_regs() { return total_regs_; }
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virtual Regs* Clone() = 0;
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static ArchEnum CurrentArch();
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static Regs* RemoteGet(pid_t pid);
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static Regs* CreateFromUcontext(ArchEnum arch, void* ucontext);
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static Regs* CreateFromLocal();
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protected:
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uint16_t total_regs_;
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Location return_loc_;
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uint64_t dex_pc_ = 0;
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};
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template <typename AddressType>
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class RegsImpl : public Regs {
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public:
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RegsImpl(uint16_t total_regs, Location return_loc)
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: Regs(total_regs, return_loc), regs_(total_regs) {}
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virtual ~RegsImpl() = default;
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inline AddressType& operator[](size_t reg) { return regs_[reg]; }
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void* RawData() override { return regs_.data(); }
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virtual void IterateRegisters(std::function<void(const char*, uint64_t)> fn) override {
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for (size_t i = 0; i < regs_.size(); ++i) {
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fn(std::to_string(i).c_str(), regs_[i]);
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}
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}
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protected:
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std::vector<AddressType> regs_;
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};
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uint64_t GetPcAdjustment(uint64_t rel_pc, Elf* elf, ArchEnum arch);
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} // namespace unwindstack
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#endif // _LIBUNWINDSTACK_REGS_H
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