456abbabf2
If the first read when dumping memory returns no data, skip ahead to the next page boundary and try and read from there. This fixes a case where the address at which to start dumping memory is unreadable, but crosses back into readable memory. Bug: 22234753 Change-Id: Ie28d5c027013577ca06f5396aba498366a3b6749
106 lines
2.7 KiB
C++
106 lines
2.7 KiB
C++
/*
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* Copyright (C) 2015 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 _DEBUGGERD_TEST_BACKTRACE_MOCK_H
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#define _DEBUGGERD_TEST_BACKTRACE_MOCK_H
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/ucontext.h>
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#include <string>
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#include <vector>
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#include <backtrace/Backtrace.h>
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#include <backtrace/BacktraceMap.h>
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class BacktraceMapMock : public BacktraceMap {
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public:
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BacktraceMapMock() : BacktraceMap(0) {}
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virtual ~BacktraceMapMock() {}
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void AddMap(backtrace_map_t& map) {
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maps_.push_back(map);
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}
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};
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class BacktraceMock : public Backtrace {
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public:
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BacktraceMock(BacktraceMapMock* map) : Backtrace(0, 0, map) {
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if (map_ == nullptr) {
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abort();
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}
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}
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virtual ~BacktraceMock() {}
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virtual bool Unwind(size_t, ucontext_t*) { return false; }
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virtual bool ReadWord(uintptr_t, word_t*) { return false;}
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virtual std::string GetFunctionNameRaw(uintptr_t, uintptr_t*) { return ""; }
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virtual size_t Read(uintptr_t addr, uint8_t* buffer, size_t bytes) {
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size_t offset = 0;
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if (last_read_addr_ > 0) {
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offset = addr - last_read_addr_;
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}
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size_t bytes_available = buffer_.size() - offset;
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if (do_partial_read_) {
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// Do a partial read.
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if (bytes > bytes_partial_read_) {
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bytes = bytes_partial_read_;
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}
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bytes_partial_read_ -= bytes;
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// Only support a single partial read.
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do_partial_read_ = false;
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} else if (bytes > bytes_available) {
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bytes = bytes_available;
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}
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if (bytes > 0) {
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memcpy(buffer, buffer_.data() + offset, bytes);
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}
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last_read_addr_ = addr;
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return bytes;
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}
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void SetReadData(uint8_t* buffer, size_t bytes) {
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buffer_.resize(bytes);
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memcpy(buffer_.data(), buffer, bytes);
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bytes_partial_read_ = 0;
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do_partial_read_ = false;
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last_read_addr_ = 0;
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}
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void SetPartialReadAmount(size_t bytes) {
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if (bytes > buffer_.size()) {
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abort();
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}
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bytes_partial_read_ = bytes;
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do_partial_read_ = true;
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}
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private:
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std::vector<uint8_t> buffer_;
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size_t bytes_partial_read_ = 0;
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uintptr_t last_read_addr_ = 0;
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bool do_partial_read_ = false;
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};
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#endif // _DEBUGGERD_TEST_BACKTRACE_MOCK_H
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