c9dee84d81
Static executables only have a .eh_frame section and no .eh_frame_hdr section. Add support for this by rearranging the class hierarchy and creating a DwarfEhFrameWithHdr class and a DwarfEhFrame class to handle the different cases. Add new unit tests for DwarfEhFrame and for the new functionality. Bug: 68820189 Test: Passes new unit tests, unwinds static executables. Change-Id: I63d7cb8c52a686e96579a2266e18c0d06bbb6e63
78 lines
2.2 KiB
C++
78 lines
2.2 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_DWARF_EH_FRAME_WITH_HDR_H
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#define _LIBUNWINDSTACK_DWARF_EH_FRAME_WITH_HDR_H
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#include <stdint.h>
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#include <unordered_map>
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#include "DwarfEhFrame.h"
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namespace unwindstack {
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// Forward declarations.
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class Memory;
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template <typename AddressType>
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class DwarfEhFrameWithHdr : public DwarfEhFrame<AddressType> {
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public:
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// Add these so that the protected members of DwarfSectionImpl
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// can be accessed without needing a this->.
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using DwarfSectionImpl<AddressType>::memory_;
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using DwarfSectionImpl<AddressType>::fde_count_;
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using DwarfSectionImpl<AddressType>::entries_offset_;
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using DwarfSectionImpl<AddressType>::entries_end_;
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using DwarfSectionImpl<AddressType>::last_error_;
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struct FdeInfo {
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AddressType pc;
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uint64_t offset;
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};
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DwarfEhFrameWithHdr(Memory* memory) : DwarfEhFrame<AddressType>(memory) {}
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virtual ~DwarfEhFrameWithHdr() = default;
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bool Init(uint64_t offset, uint64_t size) override;
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bool GetFdeOffsetFromPc(uint64_t pc, uint64_t* fde_offset) override;
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const DwarfFde* GetFdeFromIndex(size_t index) override;
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const FdeInfo* GetFdeInfoFromIndex(size_t index);
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bool GetFdeOffsetSequential(uint64_t pc, uint64_t* fde_offset);
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bool GetFdeOffsetBinary(uint64_t pc, uint64_t* fde_offset, uint64_t total_entries);
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protected:
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uint8_t version_;
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uint8_t ptr_encoding_;
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uint8_t table_encoding_;
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size_t table_entry_size_;
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uint64_t ptr_offset_;
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uint64_t entries_data_offset_;
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uint64_t cur_entries_offset_ = 0;
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std::unordered_map<uint64_t, FdeInfo> fde_info_;
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};
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} // namespace unwindstack
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#endif // _LIBUNWINDSTACK_DWARF_EH_FRAME_WITH_HDR_H
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