1673a1ba5d
As a followup of https://github.com/llvm/llvm-project/pull/67851, I'm defining a new namespace `lldb_plugin::dwarf` for the classes in this Plugins/SymbolFile/DWARF folder. This change is very NFC and helped me with exporting the necessary symbols for my out-of-tree language plugin. The only class that I didn't change is ClangDWARFASTParser, because that shouldn't be in the same namespace as the generic language-agnostic dwarf parser. It would be a good idea if other plugins follow the same namespace scheme.
57 lines
2.1 KiB
C++
57 lines
2.1 KiB
C++
//===-- DWARFDebugRanges.cpp ----------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "DWARFDebugRanges.h"
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#include "DWARFUnit.h"
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#include "llvm/DebugInfo/DWARF/DWARFDebugRangeList.h"
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using namespace lldb_private;
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using namespace lldb_private::plugin::dwarf;
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DWARFDebugRanges::DWARFDebugRanges() : m_range_map() {}
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void DWARFDebugRanges::Extract(DWARFContext &context) {
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llvm::DWARFDataExtractor extractor =
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context.getOrLoadRangesData().GetAsLLVMDWARF();
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llvm::DWARFDebugRangeList extracted_list;
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uint64_t current_offset = 0;
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auto extract_next_list = [&] {
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if (auto error = extracted_list.extract(extractor, ¤t_offset)) {
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consumeError(std::move(error));
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return false;
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}
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return true;
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};
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uint64_t previous_offset = current_offset;
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while (extractor.isValidOffset(current_offset) && extract_next_list()) {
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DWARFRangeList &lldb_range_list = m_range_map[previous_offset];
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lldb_range_list.Reserve(extracted_list.getEntries().size());
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for (auto &range : extracted_list.getEntries())
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lldb_range_list.Append(range.StartAddress,
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range.EndAddress - range.StartAddress);
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lldb_range_list.Sort();
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previous_offset = current_offset;
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}
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}
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DWARFRangeList
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DWARFDebugRanges::FindRanges(const DWARFUnit *cu,
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dw_offset_t debug_ranges_offset) const {
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dw_addr_t debug_ranges_address = cu->GetRangesBase() + debug_ranges_offset;
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auto pos = m_range_map.find(debug_ranges_address);
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DWARFRangeList ans =
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pos == m_range_map.end() ? DWARFRangeList() : pos->second;
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// All DW_AT_ranges are relative to the base address of the compile
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// unit. We add the compile unit base address to make sure all the
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// addresses are properly fixed up.
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ans.Slide(cu->GetBaseAddress());
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return ans;
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}
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