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LibDebug: Propagate errors throughout DWARF parsing

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Splitting this into a separate commit was an afterthought, so this does
not yet feature any fallible operations.
This commit is contained in:
Tim Schumacher 2023-01-22 00:32:08 +01:00 • committed by Andreas Kling
parent e235c42e4d
commit e62269650a
17 changed files with 243 additions and 204 deletions
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26
Userland/Libraries/LibDebug/Dwarf/CompilationUnit.cpp
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@ -40,27 +40,27 @@ LineProgram const& CompilationUnit::line_program() const
return *m_line_program;
}
Optional<FlatPtr> CompilationUnit::base_address() const
ErrorOr<Optional<FlatPtr>> CompilationUnit::base_address() const
{
if (m_has_cached_base_address)
return m_cached_base_address;
auto die = root_die();
auto res = die.get_attribute(Attribute::LowPc);
auto res = TRY(die.get_attribute(Attribute::LowPc));
if (res.has_value()) {
m_cached_base_address = res->as_addr();
m_cached_base_address = TRY(res->as_addr());
}
m_has_cached_base_address = true;
return m_cached_base_address;
}
u64 CompilationUnit::address_table_base() const
ErrorOr<u64> CompilationUnit::address_table_base() const
{
if (m_has_cached_address_table_base)
return m_cached_address_table_base;
auto die = root_die();
auto res = die.get_attribute(Attribute::AddrBase);
auto res = TRY(die.get_attribute(Attribute::AddrBase));
if (res.has_value()) {
VERIFY(res->form() == AttributeDataForm::SecOffset);
m_cached_address_table_base = res->as_unsigned();
@ -69,13 +69,13 @@ u64 CompilationUnit::address_table_base() const
return m_cached_address_table_base;
}
u64 CompilationUnit::string_offsets_base() const
ErrorOr<u64> CompilationUnit::string_offsets_base() const
{
if (m_has_cached_string_offsets_base)
return m_cached_string_offsets_base;
auto die = root_die();
auto res = die.get_attribute(Attribute::StrOffsetsBase);
auto res = TRY(die.get_attribute(Attribute::StrOffsetsBase));
if (res.has_value()) {
VERIFY(res->form() == AttributeDataForm::SecOffset);
m_cached_string_offsets_base = res->as_unsigned();
@ -84,13 +84,13 @@ u64 CompilationUnit::string_offsets_base() const
return m_cached_string_offsets_base;
}
u64 CompilationUnit::range_lists_base() const
ErrorOr<u64> CompilationUnit::range_lists_base() const
{
if (m_has_cached_range_lists_base)
return m_cached_range_lists_base;
auto die = root_die();
auto res = die.get_attribute(Attribute::RngListsBase);
auto res = TRY(die.get_attribute(Attribute::RngListsBase));
if (res.has_value()) {
VERIFY(res->form() == AttributeDataForm::SecOffset);
m_cached_range_lists_base = res->as_unsigned();
@ -99,9 +99,9 @@ u64 CompilationUnit::range_lists_base() const
return m_cached_range_lists_base;
}
FlatPtr CompilationUnit::get_address(size_t index) const
ErrorOr<FlatPtr> CompilationUnit::get_address(size_t index) const
{
auto base = address_table_base();
auto base = TRY(address_table_base());
auto debug_addr_data = dwarf_info().debug_addr_data();
VERIFY(base < debug_addr_data.size());
auto addresses = debug_addr_data.slice(base);
@ -111,9 +111,9 @@ FlatPtr CompilationUnit::get_address(size_t index) const
return value;
}
char const* CompilationUnit::get_string(size_t index) const
ErrorOr<char const*> CompilationUnit::get_string(size_t index) const
{
auto base = string_offsets_base();
auto base = TRY(string_offsets_base());
auto debug_str_offsets_data = dwarf_info().debug_str_offsets_data();
VERIFY(base < debug_str_offsets_data.size());
// FIXME: This assumes DWARF32