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LibDebug: Use Core::Stream to read the DWARF abbreviations map

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This commit is contained in:
Tim Schumacher 2023-01-21 12:27:24 +01:00 • committed by Andreas Kling
parent 9b35e3d95b
commit 908b88db34
2 changed files with 17 additions and 14 deletions
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29
Userland/Libraries/LibDebug/Dwarf/AbbreviationsMap.cpp
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@ -7,7 +7,8 @@
#include "AbbreviationsMap.h"
#include "DwarfInfo.h"
#include <AK/MemoryStream.h>
#include <AK/LEB128.h>
#include <LibCore/MemoryStream.h>
namespace Debug::Dwarf {
@ -15,27 +16,27 @@ AbbreviationsMap::AbbreviationsMap(DwarfInfo const& dwarf_info, u32 offset)
: m_dwarf_info(dwarf_info)
, m_offset(offset)
{
populate_map();
populate_map().release_value_but_fixme_should_propagate_errors();
}
void AbbreviationsMap::populate_map()
ErrorOr<void> AbbreviationsMap::populate_map()
{
InputMemoryStream abbreviation_stream(m_dwarf_info.abbreviation_data());
abbreviation_stream.discard_or_error(m_offset);
auto abbreviation_stream = TRY(Core::Stream::FixedMemoryStream::construct(m_dwarf_info.abbreviation_data()));
TRY(abbreviation_stream->discard(m_offset));
Core::Stream::WrapInAKInputStream wrapped_abbreviation_stream { *abbreviation_stream };
while (!abbreviation_stream.eof()) {
while (!abbreviation_stream->is_eof()) {
size_t abbreviation_code = 0;
abbreviation_stream.read_LEB128_unsigned(abbreviation_code);
LEB128::read_unsigned(wrapped_abbreviation_stream, abbreviation_code);
// An abbreviation code of 0 marks the end of the
// abbreviations for a given compilation unit
if (abbreviation_code == 0)
break;
size_t tag {};
abbreviation_stream.read_LEB128_unsigned(tag);
LEB128::read_unsigned(wrapped_abbreviation_stream, tag);
u8 has_children = 0;
abbreviation_stream >> has_children;
auto has_children = TRY(abbreviation_stream->read_value<u8>());
AbbreviationEntry abbreviation_entry {};
abbreviation_entry.tag = static_cast<EntryTag>(tag);
@ -45,15 +46,15 @@ void AbbreviationsMap::populate_map()
do {
size_t attribute_value = 0;
size_t form_value = 0;
abbreviation_stream.read_LEB128_unsigned(attribute_value);
abbreviation_stream.read_LEB128_unsigned(form_value);
LEB128::read_unsigned(wrapped_abbreviation_stream, attribute_value);
LEB128::read_unsigned(wrapped_abbreviation_stream, form_value);
current_attribute_specification.attribute = static_cast<Attribute>(attribute_value);
current_attribute_specification.form = static_cast<AttributeDataForm>(form_value);
if (current_attribute_specification.form == AttributeDataForm::ImplicitConst) {
ssize_t data_value;
abbreviation_stream.read_LEB128_signed(data_value);
LEB128::read_unsigned(wrapped_abbreviation_stream, data_value);
current_attribute_specification.value = data_value;
}
@ -64,6 +65,8 @@ void AbbreviationsMap::populate_map()
m_entries.set(static_cast<u32>(abbreviation_code), move(abbreviation_entry));
}
return {};
}
AbbreviationsMap::AbbreviationEntry const* AbbreviationsMap::get(u32 code) const

2
Userland/Libraries/LibDebug/Dwarf/AbbreviationsMap.h
View file

@ -28,7 +28,7 @@ public:
AbbreviationEntry const* get(u32 code) const;
private:
void populate_map();
ErrorOr<void> populate_map();
DwarfInfo const& m_dwarf_info;
u32 m_offset { 0 };