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fe4b16fe88
A step towards making these files usable by non-Linux systems. Bug: crashpad:196 Change-Id: I71323b29e46208b3992055722e4622d79409c44c Reviewed-on: https://chromium-review.googlesource.com/685406 Commit-Queue: Dave Bort <dbort@google.com> Reviewed-by: Mark Mentovai <mark@chromium.org>
74 lines
2.4 KiB
C++
74 lines
2.4 KiB
C++
// Copyright 2017 The Crashpad Authors. All rights reserved.
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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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#ifndef CRASHPAD_SNAPSHOT_ELF_ELF_DYNAMIC_ARRAY_READER_H_
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#define CRASHPAD_SNAPSHOT_ELF_ELF_DYNAMIC_ARRAY_READER_H_
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#include <stdint.h>
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#include <map>
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#include "base/logging.h"
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#include "base/macros.h"
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#include "util/misc/address_types.h"
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#include "util/misc/reinterpret_bytes.h"
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#include "util/process/process_memory_range.h"
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namespace crashpad {
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//! \brief A reader for ELF dynamic arrays mapped into another process.
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class ElfDynamicArrayReader {
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public:
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ElfDynamicArrayReader();
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~ElfDynamicArrayReader();
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//! \brief Initializes the reader.
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//!
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//! This method must be called once on an object and must be successfully
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//! called before any other method in this class may be called.
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//!
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//! \param[in] memory A memory reader for the remote process.
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//! \param[in] address The address in the remote process' address space where
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//! the ELF dynamic table is loaded.
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//! \param[in] size The maximum number of bytes to read.
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bool Initialize(const ProcessMemoryRange& memory,
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VMAddress address,
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VMSize size);
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//! \brief Retrieve a value from the array.
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//!
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//! \param[in] tag Specifies which value should be retrieved. The possible
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//! values for this parameter are the `DT_*` values from `<elf.h>`.
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//! \param[out] value The value, casted to an appropriate type, if found.
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//! \return `true` if the value is found.
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template <typename V>
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bool GetValue(uint64_t tag, V* value) {
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auto iter = values_.find(tag);
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if (iter == values_.end()) {
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LOG(ERROR) << "tag not found";
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return false;
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}
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return ReinterpretBytes(iter->second, value);
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}
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private:
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std::map<uint64_t, uint64_t> values_;
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DISALLOW_COPY_AND_ASSIGN(ElfDynamicArrayReader);
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};
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} // namespace crashpad
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#endif // CRASHPAD_SNAPSHOT_ELF_ELF_DYNAMIC_ARRAY_READER_H_
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