f6f691b63c
Changes: - Remove unused GetReturnAddressFromDefault function and tests. - Modify the unwinder to stop when a pc/sp in a device map. - Modify the unwinder to skip initial frames based on map names. - Unit tests that exercise all of the paths in the unwinder code. - Move the test Elf/ElfInterface objects into their own file. - Update RegsFake to handle extra cases. - Modify libbacktrace code to use this unwinder. The new unwinder does not implement the ignore frame functionality since this is not used very often and is better implemented using a skip frames in named libraries functionality. Test: Ran new unit tests, ran backtrace tests. Change-Id: Ifd65e9acd66ac5e2d0e04bd32a9ad870b54610ff
65 lines
1.7 KiB
C++
65 lines
1.7 KiB
C++
/*
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* Copyright (C) 2017 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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#include <stdint.h>
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#include <deque>
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#include <string>
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#include <unwindstack/Elf.h>
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#include <unwindstack/ElfInterface.h>
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#include <unwindstack/Memory.h>
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#include <unwindstack/Regs.h>
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#include "ElfFake.h"
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#include "RegsFake.h"
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namespace unwindstack {
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std::deque<FunctionData> ElfInterfaceFake::functions_;
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std::deque<StepData> ElfInterfaceFake::steps_;
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bool ElfInterfaceFake::GetFunctionName(uint64_t, std::string* name, uint64_t* offset) {
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if (functions_.empty()) {
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return false;
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}
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auto entry = functions_.front();
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functions_.pop_front();
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*name = entry.name;
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*offset = entry.offset;
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return true;
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}
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bool ElfInterfaceFake::Step(uint64_t, Regs* regs, Memory*, bool* finished) {
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if (steps_.empty()) {
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return false;
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}
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auto entry = steps_.front();
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steps_.pop_front();
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if (entry.pc == 0 && entry.sp == 0 && !entry.finished) {
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// Pretend as though there is no frame.
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return false;
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}
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RegsFake* fake_regs = reinterpret_cast<RegsFake*>(regs);
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fake_regs->FakeSetPc(entry.pc);
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fake_regs->FakeSetSp(entry.sp);
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*finished = entry.finished;
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return true;
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}
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} // namespace unwindstack
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