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//===-- DWARFDebugAbbrev.cpp ----------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "DWARFDebugAbbrev.h"
#include "DWARFDataExtractor.h"
#include "DWARFFormValue.h"
#include "lldb/Utility/Stream.h"
using namespace lldb;
using namespace lldb_private;
// DWARFDebugAbbrev constructor
DWARFDebugAbbrev::DWARFDebugAbbrev()
: m_abbrevCollMap(), m_prev_abbr_offset_pos(m_abbrevCollMap.end()) {}
// DWARFDebugAbbrev::Parse()
llvm::Error DWARFDebugAbbrev::parse(const DWARFDataExtractor &data) {
llvm::DataExtractor llvm_data = data.GetAsLLVM();
lldb::offset_t offset = 0;
while (llvm_data.isValidOffset(offset)) {
uint32_t initial_cu_offset = offset;
DWARFAbbreviationDeclarationSet abbrevDeclSet;
llvm::Error error = abbrevDeclSet.extract(llvm_data, &offset);
if (error)
return error;
m_abbrevCollMap[initial_cu_offset] = abbrevDeclSet;
}
m_prev_abbr_offset_pos = m_abbrevCollMap.end();
return llvm::ErrorSuccess();
}
// DWARFDebugAbbrev::GetAbbreviationDeclarationSet()
const DWARFAbbreviationDeclarationSet *
DWARFDebugAbbrev::GetAbbreviationDeclarationSet(
dw_offset_t cu_abbr_offset) const {
DWARFAbbreviationDeclarationCollMapConstIter end = m_abbrevCollMap.end();
DWARFAbbreviationDeclarationCollMapConstIter pos;
if (m_prev_abbr_offset_pos != end &&
m_prev_abbr_offset_pos->first == cu_abbr_offset)
return &(m_prev_abbr_offset_pos->second);
else {
pos = m_abbrevCollMap.find(cu_abbr_offset);
m_prev_abbr_offset_pos = pos;
}
if (pos != m_abbrevCollMap.end())
return &(pos->second);
return nullptr;
}
// DWARFDebugAbbrev::GetUnsupportedForms()
void DWARFDebugAbbrev::GetUnsupportedForms(
std::set<dw_form_t> &invalid_forms) const {
for (const auto &pair : m_abbrevCollMap)
for (const auto &decl : pair.second)
for (const auto &attr : decl.attributes())
if (!DWARFFormValue::FormIsSupported(attr.Form))
invalid_forms.insert(attr.Form);
}
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