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LibDebug: Port the rest of DWARF parsing to Core::Stream

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This commit is contained in:
Tim Schumacher 2023-01-22 00:37:38 +01:00 • committed by Andreas Kling
parent e62269650a
commit 91505d8cf3
8 changed files with 144 additions and 163 deletions
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24
Userland/Libraries/LibDebug/Dwarf/DIE.cpp
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@ -8,7 +8,8 @@
#include "CompilationUnit.h"
#include "DwarfInfo.h"
#include <AK/ByteBuffer.h>
#include <AK/MemoryStream.h>
#include <AK/LEB128.h>
#include <LibCore/MemoryStream.h>
namespace Debug::Dwarf {
@ -22,10 +23,12 @@ ErrorOr<void> DIE::rehydrate_from(u32 offset, Optional<u32> parent_offset)
{
m_offset = offset;
InputMemoryStream stream(m_compilation_unit.dwarf_info().debug_info_data());
stream.discard_or_error(m_offset);
stream.read_LEB128_unsigned(m_abbreviation_code);
m_data_offset = stream.offset();
auto stream = TRY(Core::Stream::FixedMemoryStream::construct(m_compilation_unit.dwarf_info().debug_info_data()));
// Note: We can't just slice away from the input data here, since get_attribute_value will try to recover the original offset using seek().
TRY(stream->seek(m_offset));
Core::Stream::WrapInAKInputStream wrapped_stream { *stream };
LEB128::read_unsigned(wrapped_stream, m_abbreviation_code);
m_data_offset = TRY(stream->tell());
if (m_abbreviation_code == 0) {
// An abbreviation code of 0 ( = null DIE entry) means the end of a chain of siblings
@ -39,24 +42,25 @@ ErrorOr<void> DIE::rehydrate_from(u32 offset, Optional<u32> parent_offset)
// We iterate the attributes data only to calculate this DIE's size
for (auto& attribute_spec : abbreviation_info->attribute_specifications) {
TRY(m_compilation_unit.dwarf_info().get_attribute_value(attribute_spec.form, attribute_spec.value, stream, &m_compilation_unit));
TRY(m_compilation_unit.dwarf_info().get_attribute_value(attribute_spec.form, attribute_spec.value, *stream, &m_compilation_unit));
}
}
m_size = stream.offset() - m_offset;
m_size = TRY(stream->tell()) - m_offset;
m_parent_offset = parent_offset;
return {};
}
ErrorOr<Optional<AttributeValue>> DIE::get_attribute(Attribute const& attribute) const
{
InputMemoryStream stream { m_compilation_unit.dwarf_info().debug_info_data() };
stream.discard_or_error(m_data_offset);
auto stream = TRY(Core::Stream::FixedMemoryStream::construct(m_compilation_unit.dwarf_info().debug_info_data()));
// Note: We can't just slice away from the input data here, since get_attribute_value will try to recover the original offset using seek().
TRY(stream->seek(m_data_offset));
auto abbreviation_info = m_compilation_unit.abbreviations_map().get(m_abbreviation_code);
VERIFY(abbreviation_info);
for (auto const& attribute_spec : abbreviation_info->attribute_specifications) {
auto value = TRY(m_compilation_unit.dwarf_info().get_attribute_value(attribute_spec.form, attribute_spec.value, stream, &m_compilation_unit));
auto value = TRY(m_compilation_unit.dwarf_info().get_attribute_value(attribute_spec.form, attribute_spec.value, *stream, &m_compilation_unit));
if (attribute_spec.attribute == attribute) {
return value;
}