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LibDebug: Propagate errors around LineProgram

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Found while playing Fixme-Roulette.
This commit is contained in:
Ben Wiederhake 2023-05-12 00:23:31 +02:00 committed by Andreas Kling
parent 4093952a6e
commit c5d3de3f7d
Notes: sideshowbarker 2024-07-17 02:35:27 +09:00 
Author: https://github.com/BenWiederhake
Commit: https://github.com/SerenityOS/serenity/commit/c5d3de3f7d
Pull-request: https://github.com/SerenityOS/serenity/pull/18777
Reviewed-by: https://github.com/LucasChollet
3 changed files with 18 additions and 8 deletions
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2
Userland/Libraries/LibDebug/Dwarf/DwarfInfo.cpp
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@ -59,7 +59,7 @@ ErrorOr<void> DwarfInfo::populate_compilation_units()
u32 length_after_header = compilation_unit_header.length() - (compilation_unit_header.header_size() - offsetof(CompilationUnitHeader, common.version));
auto line_program = make<LineProgram>(*this, line_info_stream);
auto line_program = TRY(LineProgram::create(*this, line_info_stream));
// HACK: Clang generates line programs for embedded resource assembly files, but not compile units.
// Meaning that for graphical applications, some line info data would be unread, triggering the assertion below.

19
Userland/Libraries/LibDebug/Dwarf/LineProgram.cpp
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@ -13,15 +13,22 @@
namespace Debug::Dwarf {
LineProgram::LineProgram(DwarfInfo& dwarf_info, SeekableStream& stream)
LineProgram::LineProgram(DwarfInfo& dwarf_info, SeekableStream& stream, size_t unit_offset)
: m_dwarf_info(dwarf_info)
, m_stream(stream)
, m_unit_offset(unit_offset)
{
m_unit_offset = m_stream.tell().release_value_but_fixme_should_propagate_errors();
parse_unit_header().release_value_but_fixme_should_propagate_errors();
parse_source_directories().release_value_but_fixme_should_propagate_errors();
parse_source_files().release_value_but_fixme_should_propagate_errors();
run_program().release_value_but_fixme_should_propagate_errors();
}
ErrorOr<NonnullOwnPtr<LineProgram>> LineProgram::create(DwarfInfo& dwarf_info, SeekableStream& stream)
{
auto offset = TRY(stream.tell());
auto program = TRY(adopt_nonnull_own_or_enomem(new (nothrow) LineProgram(dwarf_info, stream, offset)));
TRY(program->parse_unit_header());
TRY(program->parse_source_directories());
TRY(program->parse_source_files());
TRY(program->run_program());
return program;
}
ErrorOr<void> LineProgram::parse_unit_header()

5
Userland/Libraries/LibDebug/Dwarf/LineProgram.h
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@ -7,6 +7,7 @@
#pragma once
#include <AK/DeprecatedFlyString.h>
#include <AK/NonnullOwnPtr.h>
#include <AK/Vector.h>
#include <LibDebug/Dwarf/DwarfTypes.h>
@ -108,7 +109,7 @@ class LineProgram {
AK_MAKE_NONMOVABLE(LineProgram);
public:
explicit LineProgram(DwarfInfo& dwarf_info, SeekableStream& stream);
static ErrorOr<NonnullOwnPtr<LineProgram>> create(DwarfInfo& dwarf_info, SeekableStream& stream);
struct LineInfo {
FlatPtr address { 0 };
@ -133,6 +134,8 @@ public:
bool looks_like_embedded_resource() const;
private:
LineProgram(DwarfInfo& dwarf_info, SeekableStream& stream, size_t unit_offset);
ErrorOr<void> parse_unit_header();
ErrorOr<void> parse_source_directories();
ErrorOr<void> parse_source_files();