2fcf4cf13e
The backtrace offline code uses these error codes to diagnose errors. In addtion, I've had cases where seeing these errors would help diagnose failures. This also allows us to add a few features to indicate why an unwind terminated (such as max frames exceeded). Bug: 65682279 Test: Updated unit tests pass. Change-Id: If82b5092698e8a194016d670efff1320f9b44d50
114 lines
2.9 KiB
C++
114 lines
2.9 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_ARM_EXIDX_H
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#define _LIBUNWINDSTACK_ARM_EXIDX_H
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#include <stdint.h>
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#include <deque>
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namespace unwindstack {
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// Forward declarations.
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class Memory;
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class RegsArm;
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enum ArmStatus : size_t {
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ARM_STATUS_NONE = 0,
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ARM_STATUS_NO_UNWIND,
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ARM_STATUS_FINISH,
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ARM_STATUS_RESERVED,
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ARM_STATUS_SPARE,
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ARM_STATUS_TRUNCATED,
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ARM_STATUS_READ_FAILED,
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ARM_STATUS_MALFORMED,
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ARM_STATUS_INVALID_ALIGNMENT,
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ARM_STATUS_INVALID_PERSONALITY,
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};
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enum ArmOp : uint8_t {
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ARM_OP_FINISH = 0xb0,
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};
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class ArmExidx {
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public:
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ArmExidx(RegsArm* regs, Memory* elf_memory, Memory* process_memory)
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: regs_(regs), elf_memory_(elf_memory), process_memory_(process_memory) {}
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virtual ~ArmExidx() {}
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void LogRawData();
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bool ExtractEntryData(uint32_t entry_offset);
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bool Eval();
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bool Decode();
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std::deque<uint8_t>* data() { return &data_; }
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ArmStatus status() { return status_; }
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uint64_t status_address() { return status_address_; }
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RegsArm* regs() { return regs_; }
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uint32_t cfa() { return cfa_; }
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void set_cfa(uint32_t cfa) { cfa_ = cfa; }
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bool pc_set() { return pc_set_; }
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void set_pc_set(bool pc_set) { pc_set_ = pc_set; }
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void set_log(bool log) { log_ = log; }
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void set_log_skip_execution(bool skip_execution) { log_skip_execution_ = skip_execution; }
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void set_log_indent(uint8_t indent) { log_indent_ = indent; }
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private:
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bool GetByte(uint8_t* byte);
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bool DecodePrefix_10_00(uint8_t byte);
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bool DecodePrefix_10_01(uint8_t byte);
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bool DecodePrefix_10_10(uint8_t byte);
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bool DecodePrefix_10_11_0000();
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bool DecodePrefix_10_11_0001();
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bool DecodePrefix_10_11_0010();
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bool DecodePrefix_10_11_0011();
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bool DecodePrefix_10_11_01nn();
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bool DecodePrefix_10_11_1nnn(uint8_t byte);
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bool DecodePrefix_10(uint8_t byte);
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bool DecodePrefix_11_000(uint8_t byte);
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bool DecodePrefix_11_001(uint8_t byte);
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bool DecodePrefix_11_010(uint8_t byte);
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bool DecodePrefix_11(uint8_t byte);
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RegsArm* regs_ = nullptr;
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uint32_t cfa_ = 0;
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std::deque<uint8_t> data_;
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ArmStatus status_ = ARM_STATUS_NONE;
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uint64_t status_address_ = 0;
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Memory* elf_memory_;
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Memory* process_memory_;
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bool log_ = false;
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uint8_t log_indent_ = 0;
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bool log_skip_execution_ = false;
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bool pc_set_ = false;
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};
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} // namespace unwindstack
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#endif // _LIBUNWINDSTACK_ARM_EXIDX_H
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