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https://github.com/RGBCube/serenity
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LibDebug: Port the rest of DWARF parsing to Core::Stream
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parent
e62269650a
commit
91505d8cf3
8 changed files with 144 additions and 163 deletions
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@ -8,16 +8,17 @@
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#include <AK/Debug.h>
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#include <AK/DeprecatedString.h>
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#include <AK/Function.h>
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#include <AK/LEB128.h>
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#include <AK/StringBuilder.h>
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#include <LibDebug/Dwarf/DwarfInfo.h>
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namespace Debug::Dwarf {
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LineProgram::LineProgram(DwarfInfo& dwarf_info, InputMemoryStream& stream)
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LineProgram::LineProgram(DwarfInfo& dwarf_info, Core::Stream::SeekableStream& stream)
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: m_dwarf_info(dwarf_info)
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, m_stream(stream)
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{
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m_unit_offset = m_stream.offset();
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m_unit_offset = m_stream.tell().release_value_but_fixme_should_propagate_errors();
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parse_unit_header().release_value_but_fixme_should_propagate_errors();
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parse_source_directories().release_value_but_fixme_should_propagate_errors();
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parse_source_files().release_value_but_fixme_should_propagate_errors();
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@ -26,7 +27,7 @@ LineProgram::LineProgram(DwarfInfo& dwarf_info, InputMemoryStream& stream)
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ErrorOr<void> LineProgram::parse_unit_header()
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{
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m_stream >> m_unit_header;
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m_unit_header = TRY(LineProgramUnitHeader32::read_from_stream(m_stream));
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VERIFY(m_unit_header.version() >= MIN_DWARF_VERSION && m_unit_header.version() <= MAX_DWARF_VERSION);
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VERIFY(m_unit_header.opcode_base() <= sizeof(m_unit_header.std_opcode_lengths) / sizeof(m_unit_header.std_opcode_lengths[0]) + 1);
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@ -37,24 +38,25 @@ ErrorOr<void> LineProgram::parse_unit_header()
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ErrorOr<void> LineProgram::parse_path_entries(Function<void(PathEntry& entry)> callback, PathListType list_type)
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{
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Core::Stream::WrapInAKInputStream wrapped_stream { m_stream };
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if (m_unit_header.version() >= 5) {
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u8 path_entry_format_count = 0;
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m_stream >> path_entry_format_count;
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auto path_entry_format_count = TRY(m_stream.read_value<u8>());
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Vector<PathEntryFormat> format_descriptions;
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for (u8 i = 0; i < path_entry_format_count; i++) {
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UnderlyingType<ContentType> content_type;
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m_stream.read_LEB128_unsigned(content_type);
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LEB128::read_unsigned(wrapped_stream, content_type);
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UnderlyingType<AttributeDataForm> data_form;
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m_stream.read_LEB128_unsigned(data_form);
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LEB128::read_unsigned(wrapped_stream, data_form);
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format_descriptions.empend(static_cast<ContentType>(content_type), static_cast<AttributeDataForm>(data_form));
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}
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size_t paths_count = 0;
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m_stream.read_LEB128_unsigned(paths_count);
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LEB128::read_unsigned(wrapped_stream, paths_count);
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for (size_t i = 0; i < paths_count; i++) {
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PathEntry entry;
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@ -74,29 +76,30 @@ ErrorOr<void> LineProgram::parse_path_entries(Function<void(PathEntry& entry)> c
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callback(entry);
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}
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} else {
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while (m_stream.peek_or_error()) {
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DeprecatedString path;
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m_stream >> path;
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while (true) {
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StringBuilder builder;
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while (auto c = TRY(m_stream.read_value<char>()))
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TRY(builder.try_append(c));
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auto path = builder.to_deprecated_string();
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if (path.length() == 0)
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break;
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dbgln_if(DWARF_DEBUG, "path: {}", path);
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PathEntry entry;
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entry.path = path;
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if (list_type == PathListType::Filenames) {
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size_t directory_index = 0;
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m_stream.read_LEB128_unsigned(directory_index);
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LEB128::read_unsigned(wrapped_stream, directory_index);
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size_t _unused = 0;
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m_stream.read_LEB128_unsigned(_unused); // skip modification time
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m_stream.read_LEB128_unsigned(_unused); // skip file size
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LEB128::read_unsigned(wrapped_stream, _unused); // skip modification time
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LEB128::read_unsigned(wrapped_stream, _unused); // skip file size
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entry.directory_index = directory_index;
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dbgln_if(DWARF_DEBUG, "file: {}, directory index: {}", path, directory_index);
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}
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callback(entry);
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}
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m_stream.handle_recoverable_error();
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m_stream.discard_or_error(1);
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}
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VERIFY(!m_stream.has_any_error());
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VERIFY(!wrapped_stream.has_any_error());
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return {};
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}
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@ -157,11 +160,13 @@ void LineProgram::reset_registers()
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ErrorOr<void> LineProgram::handle_extended_opcode()
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{
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size_t length = 0;
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m_stream.read_LEB128_unsigned(length);
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Core::Stream::WrapInAKInputStream wrapped_stream { m_stream };
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u8 sub_opcode = 0;
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m_stream >> sub_opcode;
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size_t length = 0;
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LEB128::read_unsigned(wrapped_stream, length);
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TRY(wrapped_stream.try_handle_any_error());
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auto sub_opcode = TRY(m_stream.read_value<u8>());
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switch (sub_opcode) {
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case ExtendedOpcodes::EndSequence: {
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@ -171,18 +176,19 @@ ErrorOr<void> LineProgram::handle_extended_opcode()
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}
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case ExtendedOpcodes::SetAddress: {
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VERIFY(length == sizeof(size_t) + 1);
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m_stream >> m_address;
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m_address = TRY(m_stream.read_value<FlatPtr>());
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dbgln_if(DWARF_DEBUG, "SetAddress: {:p}", m_address);
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break;
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}
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case ExtendedOpcodes::SetDiscriminator: {
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dbgln_if(DWARF_DEBUG, "SetDiscriminator");
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size_t discriminator;
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m_stream.read_LEB128_unsigned(discriminator);
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LEB128::read_unsigned(wrapped_stream, discriminator);
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TRY(wrapped_stream.try_handle_any_error());
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break;
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}
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default:
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dbgln("Encountered unknown sub opcode {} at stream offset {:p}", sub_opcode, m_stream.offset());
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dbgln("Encountered unknown sub opcode {} at stream offset {:p}", sub_opcode, TRY(m_stream.tell()));
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VERIFY_NOT_REACHED();
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}
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@ -190,6 +196,8 @@ ErrorOr<void> LineProgram::handle_extended_opcode()
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}
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ErrorOr<void> LineProgram::handle_standard_opcode(u8 opcode)
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{
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Core::Stream::WrapInAKInputStream wrapped_stream { m_stream };
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switch (opcode) {
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case StandardOpcodes::Copy: {
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append_to_line_info();
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@ -197,7 +205,8 @@ ErrorOr<void> LineProgram::handle_standard_opcode(u8 opcode)
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}
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case StandardOpcodes::AdvancePc: {
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size_t operand = 0;
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m_stream.read_LEB128_unsigned(operand);
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LEB128::read_unsigned(wrapped_stream, operand);
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TRY(wrapped_stream.try_handle_any_error());
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size_t delta = operand * m_unit_header.min_instruction_length();
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dbgln_if(DWARF_DEBUG, "AdvancePC by: {} to: {:p}", delta, m_address + delta);
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m_address += delta;
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@ -205,7 +214,8 @@ ErrorOr<void> LineProgram::handle_standard_opcode(u8 opcode)
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}
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case StandardOpcodes::SetFile: {
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size_t new_file_index = 0;
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m_stream.read_LEB128_unsigned(new_file_index);
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LEB128::read_unsigned(wrapped_stream, new_file_index);
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TRY(wrapped_stream.try_handle_any_error());
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dbgln_if(DWARF_DEBUG, "SetFile: new file index: {}", new_file_index);
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m_file_index = new_file_index;
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break;
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@ -214,13 +224,15 @@ ErrorOr<void> LineProgram::handle_standard_opcode(u8 opcode)
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// not implemented
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dbgln_if(DWARF_DEBUG, "SetColumn");
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size_t new_column;
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m_stream.read_LEB128_unsigned(new_column);
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LEB128::read_unsigned(wrapped_stream, new_column);
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TRY(wrapped_stream.try_handle_any_error());
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break;
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}
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case StandardOpcodes::AdvanceLine: {
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ssize_t line_delta;
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m_stream.read_LEB128_signed(line_delta);
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LEB128::read_signed(wrapped_stream, line_delta);
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TRY(wrapped_stream.try_handle_any_error());
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VERIFY(line_delta >= 0 || m_line >= (size_t)(-line_delta));
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m_line += line_delta;
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dbgln_if(DWARF_DEBUG, "AdvanceLine: {}", m_line);
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@ -241,13 +253,13 @@ ErrorOr<void> LineProgram::handle_standard_opcode(u8 opcode)
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}
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case StandardOpcodes::SetIsa: {
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size_t isa;
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m_stream.read_LEB128_unsigned(isa);
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LEB128::read_unsigned(wrapped_stream, isa);
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TRY(wrapped_stream.try_handle_any_error());
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dbgln_if(DWARF_DEBUG, "SetIsa: {}", isa);
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break;
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}
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case StandardOpcodes::FixAdvancePc: {
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u16 delta = 0;
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m_stream >> delta;
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auto delta = TRY(m_stream.read_value<u16>());
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dbgln_if(DWARF_DEBUG, "FixAdvancePC by: {} to: {:p}", delta, m_address + delta);
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m_address += delta;
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break;
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@ -291,11 +303,10 @@ ErrorOr<void> LineProgram::run_program()
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{
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reset_registers();
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while (m_stream.offset() < m_unit_offset + sizeof(u32) + m_unit_header.length()) {
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u8 opcode = 0;
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m_stream >> opcode;
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while (TRY(m_stream.tell()) < m_unit_offset + sizeof(u32) + m_unit_header.length()) {
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auto opcode = TRY(m_stream.read_value<u8>());
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dbgln_if(DWARF_DEBUG, "{:p}: opcode: {}", m_stream.offset() - 1, opcode);
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dbgln_if(DWARF_DEBUG, "{:p}: opcode: {}", TRY(m_stream.tell()) - 1, opcode);
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if (opcode == 0) {
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TRY(handle_extended_opcode());
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