230adfa96c
LLDB does not support this DWARF5 form atm. At least gcc emits it in some cases when doing optimization for abbreviations. As far I can tell, clang does not support it yet, though the rest LLVM code already knows about it. The patch adds the support. Differential revision: https://reviews.llvm.org/D52689 llvm-svn: 344328
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, dw_offset_t attr_die_offset,
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dw_attr_t attr, dw_form_t form) {
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AttributeValue attr_value = {
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cu, attr_die_offset, {attr, form, DWARFFormValue::ValueType()}};
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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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