| 1 | //===-- DWARFAttribute.cpp ------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #include "DWARFAttribute.h" |
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| 10 | #include "DWARFUnit.h" |
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| 11 | #include "DWARFDebugInfo.h" |
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| 12 | |
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| 13 | using namespace lldb_private::dwarf; |
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| 14 | using namespace lldb_private::plugin::dwarf; |
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| 15 | |
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| 16 | DWARFAttributes::DWARFAttributes() : m_infos() {} |
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| 17 | |
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| 18 | DWARFAttributes::~DWARFAttributes() = default; |
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| 19 | |
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| 20 | uint32_t DWARFAttributes::FindAttributeIndex(dw_attr_t attr) const { |
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| 21 | collection::const_iterator end = m_infos.end(); |
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| 22 | collection::const_iterator beg = m_infos.begin(); |
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| 23 | collection::const_iterator pos; |
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| 24 | for (pos = beg; pos != end; ++pos) { |
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| 25 | if (pos->attr.get_attr() == attr) |
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| 26 | return std::distance(first: beg, last: pos); |
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| 27 | } |
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| 28 | return UINT32_MAX; |
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| 29 | } |
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| 30 | |
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| 31 | void DWARFAttributes::Append(const DWARFFormValue &form_value, |
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| 32 | dw_offset_t attr_die_offset, dw_attr_t attr) { |
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| 33 | AttributeValue attr_value = {.cu: const_cast<DWARFUnit *>(form_value.GetUnit()), |
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| 34 | .die_offset: attr_die_offset, |
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| 35 | .attr: {attr, form_value.Form(), form_value.Value()}}; |
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| 36 | m_infos.push_back(Elt: attr_value); |
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| 37 | } |
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| 38 | |
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| 39 | bool DWARFAttributes::( |
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| 40 | uint32_t i, DWARFFormValue &form_value) const { |
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| 41 | const DWARFUnit *cu = CompileUnitAtIndex(i); |
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| 42 | form_value.SetUnit(cu); |
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| 43 | form_value.SetForm(FormAtIndex(i)); |
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| 44 | if (form_value.Form() == DW_FORM_implicit_const) { |
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| 45 | form_value.SetValue(ValueAtIndex(i)); |
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| 46 | return true; |
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| 47 | } |
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| 48 | lldb::offset_t offset = DIEOffsetAtIndex(i); |
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| 49 | return form_value.ExtractValue(data: cu->GetData(), offset_ptr: &offset); |
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| 50 | } |
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| 51 | |
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| 52 | DWARFDIE |
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| 53 | DWARFAttributes::FormValueAsReference(dw_attr_t attr) const { |
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| 54 | const uint32_t attr_idx = FindAttributeIndex(attr); |
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| 55 | if (attr_idx != UINT32_MAX) |
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| 56 | return FormValueAsReferenceAtIndex(i: attr_idx); |
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| 57 | return {}; |
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| 58 | } |
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| 59 | |
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| 60 | DWARFDIE |
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| 61 | DWARFAttributes::FormValueAsReferenceAtIndex(uint32_t i) const { |
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| 62 | DWARFFormValue form_value; |
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| 63 | if (ExtractFormValueAtIndex(i, form_value)) |
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| 64 | return form_value.Reference(); |
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| 65 | return {}; |
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| 66 | } |
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| 67 | |
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