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LibDebug: Tolerate missing debug information

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We previously crashed when programs were missing certain debug information.
This commit is contained in:
Itamar 2020-05-23 14:55:39 +03:00 • committed by Andreas Kling
parent 58480a510f
commit 2686957836
2 changed files with 11 additions and 3 deletions
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5
Libraries/LibDebug/Dwarf/DwarfInfo.cpp
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@ -41,12 +41,15 @@ DwarfInfo::DwarfInfo(NonnullRefPtr<const ELF::Loader> elf)
ByteBuffer DwarfInfo::section_data(const String& section_name)
{
auto section = m_elf->image().lookup_section(section_name);
ASSERT(!section.is_undefined());
if (section.is_undefined())
return {};
return section.wrapping_byte_buffer();
}
void DwarfInfo::populate_compilation_units()
{
if (m_debug_info_data.is_null())
return;
// We have to const_cast here because there isn't a version of
// BufferStream that accepts a const ByteStream
// We take care not to use BufferStream operations that modify the underlying buffer