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https://github.com/RGBCube/serenity
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LibDebug: Parse DWARF address ranges using Core::Stream
This commit is contained in:
Tim Schumacher
Andreas Kling
parent
908b88db34
commit
e235c42e4d
3 changed files with 56 additions and 50 deletions
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@ -6,34 +6,34 @@
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#include "AddressRanges.h"
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#include "DwarfTypes.h"
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#include <AK/LEB128.h>
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#include <LibCore/Stream.h>
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namespace Debug::Dwarf {
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AddressRangesV5::AddressRangesV5(ReadonlyBytes range_lists_data, size_t offset, CompilationUnit const& compilation_unit)
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: m_range_lists_stream(range_lists_data)
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AddressRangesV5::AddressRangesV5(NonnullOwnPtr<Core::Stream::Stream> range_lists_stream, CompilationUnit const& compilation_unit)
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: m_range_lists_stream(move(range_lists_stream))
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, m_compilation_unit(compilation_unit)
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{
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m_range_lists_stream.seek(offset);
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}
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void AddressRangesV5::for_each_range(Function<void(Range)> callback)
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ErrorOr<void> AddressRangesV5::for_each_range(Function<void(Range)> callback)
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{
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// Dwarf version 5, section 2.17.3 "Non-Contiguous Address Ranges"
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Core::Stream::WrapInAKInputStream wrapped_range_lists_stream { *m_range_lists_stream };
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Optional<FlatPtr> current_base_address;
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while (!m_range_lists_stream.eof() && !m_range_lists_stream.has_any_error()) {
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u8 entry_type;
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m_range_lists_stream >> entry_type;
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while (!m_range_lists_stream->is_eof()) {
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auto entry_type = TRY(m_range_lists_stream->read_value<u8>());
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switch (static_cast<RangeListEntryType>(entry_type)) {
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case RangeListEntryType::BaseAddress: {
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FlatPtr base;
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m_range_lists_stream >> base;
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current_base_address = base;
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current_base_address = TRY(m_range_lists_stream->read_value<FlatPtr>());
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break;
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}
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case RangeListEntryType::BaseAddressX: {
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FlatPtr index;
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m_range_lists_stream.read_LEB128_unsigned(index);
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LEB128::read_unsigned(wrapped_range_lists_stream, index);
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current_base_address = m_compilation_unit.get_address(index);
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break;
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}
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@ -43,68 +43,66 @@ void AddressRangesV5::for_each_range(Function<void(Range)> callback)
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base_address = m_compilation_unit.base_address();
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}
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if (!base_address.has_value()) {
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dbgln("expected base_address for rangelist");
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return;
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}
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if (!base_address.has_value())
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return Error::from_string_literal("Expected base_address for rangelist");
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size_t start_offset, end_offset;
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m_range_lists_stream.read_LEB128_unsigned(start_offset);
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m_range_lists_stream.read_LEB128_unsigned(end_offset);
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LEB128::read_unsigned(wrapped_range_lists_stream, start_offset);
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LEB128::read_unsigned(wrapped_range_lists_stream, end_offset);
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callback(Range { start_offset + *base_address, end_offset + *base_address });
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break;
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}
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case RangeListEntryType::StartLength: {
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FlatPtr start;
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m_range_lists_stream >> start;
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auto start = TRY(m_range_lists_stream->read_value<FlatPtr>());
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size_t length;
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m_range_lists_stream.read_LEB128_unsigned(length);
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LEB128::read_unsigned(wrapped_range_lists_stream, length);
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callback(Range { start, start + length });
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break;
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}
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case RangeListEntryType::StartXEndX: {
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size_t start, end;
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m_range_lists_stream.read_LEB128_unsigned(start);
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m_range_lists_stream.read_LEB128_unsigned(end);
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LEB128::read_unsigned(wrapped_range_lists_stream, start);
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LEB128::read_unsigned(wrapped_range_lists_stream, end);
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callback(Range { m_compilation_unit.get_address(start), m_compilation_unit.get_address(end) });
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break;
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}
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case RangeListEntryType::StartXLength: {
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size_t start, length;
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m_range_lists_stream.read_LEB128_unsigned(start);
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m_range_lists_stream.read_LEB128_unsigned(length);
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LEB128::read_unsigned(wrapped_range_lists_stream, start);
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LEB128::read_unsigned(wrapped_range_lists_stream, length);
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auto start_addr = m_compilation_unit.get_address(start);
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callback(Range { start_addr, start_addr + length });
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break;
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}
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case RangeListEntryType::EndOfList:
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return;
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return {};
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default:
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dbgln("unsupported range list entry type: 0x{:x}", entry_type);
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return;
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return Error::from_string_literal("Unsupported range list entry type");
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}
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}
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return {};
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}
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AddressRangesV4::AddressRangesV4(ReadonlyBytes ranges_data, size_t offset, CompilationUnit const& compilation_unit)
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: m_ranges_stream(ranges_data)
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AddressRangesV4::AddressRangesV4(NonnullOwnPtr<Core::Stream::Stream> ranges_stream, CompilationUnit const& compilation_unit)
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: m_ranges_stream(move(ranges_stream))
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, m_compilation_unit(compilation_unit)
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{
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m_ranges_stream.seek(offset);
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}
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void AddressRangesV4::for_each_range(Function<void(Range)> callback)
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ErrorOr<void> AddressRangesV4::for_each_range(Function<void(Range)> callback)
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{
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// Dwarf version 4, section 2.17.3 "Non-Contiguous Address Ranges"
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Optional<FlatPtr> current_base_address;
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while (!m_ranges_stream.eof() && !m_ranges_stream.has_any_error()) {
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FlatPtr begin, end;
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m_ranges_stream >> begin >> end;
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while (!m_ranges_stream->is_eof()) {
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auto begin = TRY(m_ranges_stream->read_value<FlatPtr>());
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auto end = TRY(m_ranges_stream->read_value<FlatPtr>());
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if (begin == 0 && end == 0) {
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// end of list entry
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return;
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return {};
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} else if (begin == explode_byte(0xff)) {
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current_base_address = end;
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} else {
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@ -112,6 +110,8 @@ void AddressRangesV4::for_each_range(Function<void(Range)> callback)
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callback({ base + begin, base + end });
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}
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}
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return {};
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}
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}
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@ -11,6 +11,7 @@
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#include <AK/Function.h>
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#include <AK/MemoryStream.h>
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#include <AK/Noncopyable.h>
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#include <LibCore/Stream.h>
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namespace Debug::Dwarf {
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@ -24,12 +25,12 @@ class AddressRangesV5 {
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AK_MAKE_NONMOVABLE(AddressRangesV5);
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public:
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AddressRangesV5(ReadonlyBytes range_lists_data, size_t offset, CompilationUnit const& compilation_unit);
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AddressRangesV5(NonnullOwnPtr<Core::Stream::Stream> range_lists_stream, CompilationUnit const& compilation_unit);
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void for_each_range(Function<void(Range)>);
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ErrorOr<void> for_each_range(Function<void(Range)>);
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private:
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InputMemoryStream m_range_lists_stream;
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NonnullOwnPtr<Core::Stream::Stream> m_range_lists_stream;
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CompilationUnit const& m_compilation_unit;
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};
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@ -38,12 +39,12 @@ class AddressRangesV4 {
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AK_MAKE_NONMOVABLE(AddressRangesV4);
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public:
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AddressRangesV4(ReadonlyBytes ranges_data, size_t offset, CompilationUnit const&);
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AddressRangesV4(NonnullOwnPtr<Core::Stream::Stream> ranges_stream, CompilationUnit const&);
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void for_each_range(Function<void(Range)>);
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ErrorOr<void> for_each_range(Function<void(Range)>);
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private:
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InputMemoryStream m_ranges_stream;
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NonnullOwnPtr<Core::Stream::Stream> m_ranges_stream;
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CompilationUnit const& m_compilation_unit;
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};
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@ -11,6 +11,7 @@
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#include <AK/ByteReader.h>
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#include <AK/MemoryStream.h>
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#include <LibCore/MemoryStream.h>
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#include <LibDebug/DebugInfo.h>
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namespace Debug::Dwarf {
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@ -337,7 +338,7 @@ void DwarfInfo::build_cached_dies() const
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m_cached_dies_by_range.insert(range.start_address, DIEAndRange { die, range });
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m_cached_dies_by_offset.insert(die.offset(), die);
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};
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auto get_ranges_of_die = [this](DIE const& die) -> Vector<DIERange> {
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auto get_ranges_of_die = [this](DIE const& die) -> ErrorOr<Vector<DIERange>> {
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auto ranges = die.get_attribute(Attribute::Ranges);
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if (ranges.has_value()) {
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size_t offset;
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@ -353,15 +354,19 @@ void DwarfInfo::build_cached_dies() const
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Vector<DIERange> entries;
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if (die.compilation_unit().dwarf_version() == 5) {
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AddressRangesV5 address_ranges(debug_range_lists_data(), offset, die.compilation_unit());
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address_ranges.for_each_range([&entries](auto range) {
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auto range_lists_stream = TRY(Core::Stream::FixedMemoryStream::construct(debug_range_lists_data()));
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TRY(range_lists_stream->seek(offset));
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AddressRangesV5 address_ranges(move(range_lists_stream), die.compilation_unit());
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TRY(address_ranges.for_each_range([&entries](auto range) {
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entries.empend(range.start, range.end);
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});
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}));
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} else {
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AddressRangesV4 address_ranges(debug_ranges_data(), offset, die.compilation_unit());
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address_ranges.for_each_range([&entries](auto range) {
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auto ranges_stream = TRY(Core::Stream::FixedMemoryStream::construct(debug_ranges_data()));
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TRY(ranges_stream->seek(offset));
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AddressRangesV4 address_ranges(move(ranges_stream), die.compilation_unit());
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TRY(address_ranges.for_each_range([&entries](auto range) {
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entries.empend(range.start, range.end);
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});
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}));
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}
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return entries;
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}
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@ -370,7 +375,7 @@ void DwarfInfo::build_cached_dies() const
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auto end = die.get_attribute(Attribute::HighPc);
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if (!start.has_value() || !end.has_value())
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return {};
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return Vector<DIERange> {};
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VERIFY(start->type() == Dwarf::AttributeValue::Type::Address);
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@ -383,14 +388,14 @@ void DwarfInfo::build_cached_dies() const
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else
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range_end = start->as_addr() + end->as_unsigned();
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return { DIERange { start.value().as_addr(), range_end } };
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return Vector<DIERange> { DIERange { start.value().as_addr(), range_end } };
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};
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// If we simply use a lambda, type deduction fails because it's used recursively.
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Function<void(DIE const& die)> insert_to_cache_recursively;
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insert_to_cache_recursively = [&](DIE const& die) {
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if (die.offset() == 0 || die.parent_offset().has_value()) {
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auto ranges = get_ranges_of_die(die);
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auto ranges = get_ranges_of_die(die).release_value_but_fixme_should_propagate_errors();
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for (auto& range : ranges) {
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insert_to_cache(die, range);
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}
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