f56c30d13b
This cleanup is designed to make the https://reviews.llvm.org/D32167 patch smaller and easier to read. Cleanup in this patch: Allow DWARFUnit subclasses to hand out the data that should be used when decoding data for a DIE. The information might be in .debug_info or could be in .debug_types. There is a new virtual function on DWARFUnit that each subclass must override: virtual const lldb_private::DWARFDataExtractor &DWARFUnit::GetData() const; This allows DWARFCompileUnit and eventually DWARFTypeUnit to hand out different data to be used when decoding the DIE information. Add a new pure virtual function to get the size of the DWARF unit header: virtual uint32_t DWARFUnit::GetHeaderByteSize() const = 0; This allows DWARFCompileUnit and eventually DWARFTypeUnit to hand out different offsets where the first DIE starts when decoding DIE information from the unit. Added a new function to DWARFDataExtractor to get the size of an offset: size_t DWARFDataExtractor::GetDWARFSizeOfOffset() const; Removed dead dumping and parsing code in the DWARFDebugInfo class. Inlined a bunch of calls in DWARFUnit for accessors that were just returning integer member variables. Renamed DWARFUnit::Size() to DWARFUnit::GetHeaderByteSize() as it clearly states what it is doing and makes more sense. Differential Revision: https://reviews.llvm.org/D46606 llvm-svn: 331892
74 lines
2.3 KiB
C++
74 lines
2.3 KiB
C++
//===-- DWARFAttribute.cpp --------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "DWARFAttribute.h"
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#include "DWARFUnit.h"
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#include "DWARFDebugInfo.h"
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DWARFAttributes::DWARFAttributes() : m_infos() {}
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DWARFAttributes::~DWARFAttributes() {}
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uint32_t DWARFAttributes::FindAttributeIndex(dw_attr_t attr) const {
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collection::const_iterator end = m_infos.end();
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collection::const_iterator beg = m_infos.begin();
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collection::const_iterator pos;
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for (pos = beg; pos != end; ++pos) {
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if (pos->attr.get_attr() == attr)
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return std::distance(beg, pos);
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}
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return UINT32_MAX;
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}
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void DWARFAttributes::Append(const DWARFUnit *cu,
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dw_offset_t attr_die_offset, dw_attr_t attr,
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dw_form_t form) {
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AttributeValue attr_value = {cu, attr_die_offset, {attr, form}};
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m_infos.push_back(attr_value);
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}
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bool DWARFAttributes::ContainsAttribute(dw_attr_t attr) const {
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return FindAttributeIndex(attr) != UINT32_MAX;
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}
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bool DWARFAttributes::RemoveAttribute(dw_attr_t attr) {
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uint32_t attr_index = FindAttributeIndex(attr);
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if (attr_index != UINT32_MAX) {
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m_infos.erase(m_infos.begin() + attr_index);
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return true;
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}
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return false;
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}
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bool DWARFAttributes::ExtractFormValueAtIndex(
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uint32_t i, DWARFFormValue &form_value) const {
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const DWARFUnit *cu = CompileUnitAtIndex(i);
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form_value.SetCompileUnit(cu);
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form_value.SetForm(FormAtIndex(i));
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lldb::offset_t offset = DIEOffsetAtIndex(i);
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return form_value.ExtractValue(cu->GetData(), &offset);
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}
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uint64_t DWARFAttributes::FormValueAsUnsigned(dw_attr_t attr,
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uint64_t fail_value) const {
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const uint32_t attr_idx = FindAttributeIndex(attr);
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if (attr_idx != UINT32_MAX)
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return FormValueAsUnsignedAtIndex(attr_idx, fail_value);
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return fail_value;
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}
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uint64_t
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DWARFAttributes::FormValueAsUnsignedAtIndex(uint32_t i,
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uint64_t fail_value) const {
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DWARFFormValue form_value;
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if (ExtractFormValueAtIndex(i, form_value))
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return form_value.Reference();
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return fail_value;
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}
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