bool
DWARFDebugPubnames::GeneratePubnames(SymbolFileDWARF* dwarf2Data)
{
Timer scoped_timer (__PRETTY_FUNCTION__,
"DWARFDebugPubnames::GeneratePubnames (data = %p)",
dwarf2Data);
LogSP log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_PUBNAMES));
if (log)
log->Printf("DWARFDebugPubnames::GeneratePubnames (data = %p)", dwarf2Data);
m_sets.clear();
DWARFDebugInfo* debug_info = dwarf2Data->DebugInfo();
if (debug_info)
{
const DataExtractor* debug_str = &dwarf2Data->get_debug_str_data();
uint32_t cu_idx = 0;
const uint32_t num_compile_units = dwarf2Data->GetNumCompileUnits();
for (cu_idx = 0; cu_idx < num_compile_units; ++cu_idx)
{
DWARFCompileUnit* cu = debug_info->GetCompileUnitAtIndex(cu_idx);
const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (cu->GetAddressByteSize());
bool clear_dies = cu->ExtractDIEsIfNeeded (false) > 1;
DWARFDIECollection dies;
const size_t die_count = cu->AppendDIEsWithTag (DW_TAG_subprogram, dies) +
cu->AppendDIEsWithTag (DW_TAG_variable, dies);
dw_offset_t cu_offset = cu->GetOffset();
DWARFDebugPubnamesSet pubnames_set(DW_INVALID_OFFSET, cu_offset, cu->GetNextCompileUnitOffset() - cu_offset);
size_t die_idx;
for (die_idx = 0; die_idx < die_count; ++die_idx)
{
const DWARFDebugInfoEntry *die = dies.GetDIEPtrAtIndex(die_idx);
DWARFDebugInfoEntry::Attributes attributes;
const char *name = NULL;
const char *mangled = NULL;
bool add_die = false;
bool is_variable = false;
const size_t num_attributes = die->GetAttributes(dwarf2Data, cu, fixed_form_sizes, attributes);
if (num_attributes > 0)
{
uint32_t i;
dw_tag_t tag = die->Tag();
is_variable = tag == DW_TAG_variable;
for (i=0; i<num_attributes; ++i)
{
dw_attr_t attr = attributes.AttributeAtIndex(i);
DWARFFormValue form_value;
switch (attr)
{
case DW_AT_name:
if (attributes.ExtractFormValueAtIndex(dwarf2Data, i, form_value))
name = form_value.AsCString(debug_str);
break;
case DW_AT_MIPS_linkage_name:
if (attributes.ExtractFormValueAtIndex(dwarf2Data, i, form_value))
mangled = form_value.AsCString(debug_str);
break;
case DW_AT_low_pc:
case DW_AT_ranges:
case DW_AT_entry_pc:
if (tag == DW_TAG_subprogram)
add_die = true;
break;
case DW_AT_location:
if (tag == DW_TAG_variable)
{
const DWARFDebugInfoEntry* parent_die = die->GetParent();
while ( parent_die != NULL )
{
switch (parent_die->Tag())
{
case DW_TAG_subprogram:
case DW_TAG_lexical_block:
case DW_TAG_inlined_subroutine:
// Even if this is a function level static, we don't add it. We could theoretically
// add these if we wanted to by introspecting into the DW_AT_location and seeing
// if the location describes a hard coded address, but we don't want the performance
// penalty of that right now.
add_die = false;
// if (attributes.ExtractFormValueAtIndex(dwarf2Data, i, form_value))
// {
// // If we have valid block data, then we have location expression bytes
// // that are fixed (not a location list).
// const uint8_t *block_data = form_value.BlockData();
// if (block_data)
// {
// uint32_t block_length = form_value.Unsigned();
// if (block_length == 1 + attributes.CompileUnitAtIndex(i)->GetAddressByteSize())
// {
// if (block_data[0] == DW_OP_addr)
// add_die = true;
// }
// }
// }
parent_die = NULL; // Terminate the while loop.
break;
case DW_TAG_compile_unit:
add_die = true;
parent_die = NULL; // Terminate the while loop.
break;
default:
parent_die = parent_die->GetParent(); // Keep going in the while loop.
break;
}
}
}
break;
}
}
}
if (add_die && (name || mangled))
{
pubnames_set.AddDescriptor(die->GetOffset() - cu_offset, mangled ? mangled : name);
}
}
if (pubnames_set.NumDescriptors() > 0)
{
m_sets.push_back(pubnames_set);
}
// Keep memory down by clearing DIEs if this generate function
// caused them to be parsed
if (clear_dies)
cu->ClearDIEs (true);
}
}
if (m_sets.empty())
return false;
if (log)
Dump (log.get());
return true;
}
void
DWARFCompileUnit::Index (const uint32_t cu_idx,
NameToDIE& func_basenames,
NameToDIE& func_fullnames,
NameToDIE& func_methods,
NameToDIE& func_selectors,
NameToDIE& objc_class_selectors,
NameToDIE& globals,
NameToDIE& types,
NameToDIE& namespaces)
{
const DWARFDataExtractor* debug_str = &m_dwarf2Data->get_debug_str_data();
const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (GetAddressByteSize(), m_is_dwarf64);
Log *log (LogChannelDWARF::GetLogIfAll (DWARF_LOG_LOOKUPS));
if (log)
{
m_dwarf2Data->GetObjectFile()->GetModule()->LogMessage (log,
"DWARFCompileUnit::Index() for compile unit at .debug_info[0x%8.8x]",
GetOffset());
}
DWARFDebugInfoEntry::const_iterator pos;
DWARFDebugInfoEntry::const_iterator begin = m_die_array.begin();
DWARFDebugInfoEntry::const_iterator end = m_die_array.end();
for (pos = begin; pos != end; ++pos)
{
const DWARFDebugInfoEntry &die = *pos;
const dw_tag_t tag = die.Tag();
switch (tag)
{
case DW_TAG_subprogram:
case DW_TAG_inlined_subroutine:
case DW_TAG_base_type:
case DW_TAG_class_type:
case DW_TAG_constant:
case DW_TAG_enumeration_type:
case DW_TAG_string_type:
case DW_TAG_subroutine_type:
case DW_TAG_structure_type:
case DW_TAG_union_type:
case DW_TAG_typedef:
case DW_TAG_namespace:
case DW_TAG_variable:
case DW_TAG_unspecified_type:
break;
default:
continue;
}
DWARFDebugInfoEntry::Attributes attributes;
const char *name = NULL;
const char *mangled_cstr = NULL;
bool is_declaration = false;
//bool is_artificial = false;
bool has_address = false;
bool has_location = false;
bool is_global_or_static_variable = false;
dw_offset_t specification_die_offset = DW_INVALID_OFFSET;
const size_t num_attributes = die.GetAttributes(m_dwarf2Data, this, fixed_form_sizes, attributes);
if (num_attributes > 0)
{
for (uint32_t i=0; i<num_attributes; ++i)
{
dw_attr_t attr = attributes.AttributeAtIndex(i);
DWARFFormValue form_value;
switch (attr)
{
case DW_AT_name:
if (attributes.ExtractFormValueAtIndex(m_dwarf2Data, i, form_value))
name = form_value.AsCString(debug_str);
break;
case DW_AT_declaration:
if (attributes.ExtractFormValueAtIndex(m_dwarf2Data, i, form_value))
is_declaration = form_value.Unsigned() != 0;
break;
// case DW_AT_artificial:
// if (attributes.ExtractFormValueAtIndex(m_dwarf2Data, i, form_value))
// is_artificial = form_value.Unsigned() != 0;
// break;
case DW_AT_MIPS_linkage_name:
case DW_AT_linkage_name:
if (attributes.ExtractFormValueAtIndex(m_dwarf2Data, i, form_value))
mangled_cstr = form_value.AsCString(debug_str);
break;
case DW_AT_low_pc:
case DW_AT_high_pc:
case DW_AT_ranges:
has_address = true;
break;
case DW_AT_entry_pc:
has_address = true;
break;
case DW_AT_location:
has_location = true;
if (tag == DW_TAG_variable)
{
const DWARFDebugInfoEntry* parent_die = die.GetParent();
while ( parent_die != NULL )
{
switch (parent_die->Tag())
{
case DW_TAG_subprogram:
case DW_TAG_lexical_block:
case DW_TAG_inlined_subroutine:
// Even if this is a function level static, we don't add it. We could theoretically
// add these if we wanted to by introspecting into the DW_AT_location and seeing
// if the location describes a hard coded address, but we dont want the performance
// penalty of that right now.
is_global_or_static_variable = false;
// if (attributes.ExtractFormValueAtIndex(dwarf2Data, i, form_value))
// {
// // If we have valid block data, then we have location expression bytes
// // that are fixed (not a location list).
// const uint8_t *block_data = form_value.BlockData();
// if (block_data)
// {
// uint32_t block_length = form_value.Unsigned();
// if (block_length == 1 + attributes.CompileUnitAtIndex(i)->GetAddressByteSize())
// {
// if (block_data[0] == DW_OP_addr)
// add_die = true;
// }
// }
// }
parent_die = NULL; // Terminate the while loop.
break;
case DW_TAG_compile_unit:
is_global_or_static_variable = true;
parent_die = NULL; // Terminate the while loop.
break;
default:
parent_die = parent_die->GetParent(); // Keep going in the while loop.
break;
}
}
}
break;
case DW_AT_specification:
if (attributes.ExtractFormValueAtIndex(m_dwarf2Data, i, form_value))
specification_die_offset = form_value.Reference();
break;
}
}
}
switch (tag)
{
case DW_TAG_subprogram:
if (has_address)
{
if (name)
{
// Note, this check is also done in ParseMethodName, but since this is a hot loop, we do the
// simple inlined check outside the call.
ObjCLanguageRuntime::MethodName objc_method(name, true);
if (objc_method.IsValid(true))
{
ConstString objc_class_name_with_category (objc_method.GetClassNameWithCategory());
ConstString objc_selector_name (objc_method.GetSelector());
ConstString objc_fullname_no_category_name (objc_method.GetFullNameWithoutCategory(true));
ConstString objc_class_name_no_category (objc_method.GetClassName());
func_fullnames.Insert (ConstString(name), die.GetOffset());
if (objc_class_name_with_category)
objc_class_selectors.Insert(objc_class_name_with_category, die.GetOffset());
if (objc_class_name_no_category && objc_class_name_no_category != objc_class_name_with_category)
objc_class_selectors.Insert(objc_class_name_no_category, die.GetOffset());
if (objc_selector_name)
func_selectors.Insert (objc_selector_name, die.GetOffset());
if (objc_fullname_no_category_name)
func_fullnames.Insert (objc_fullname_no_category_name, die.GetOffset());
}
// If we have a mangled name, then the DW_AT_name attribute
// is usually the method name without the class or any parameters
const DWARFDebugInfoEntry *parent = die.GetParent();
bool is_method = false;
if (parent)
{
dw_tag_t parent_tag = parent->Tag();
if (parent_tag == DW_TAG_class_type || parent_tag == DW_TAG_structure_type)
{
is_method = true;
}
else
{
if (specification_die_offset != DW_INVALID_OFFSET)
{
const DWARFDebugInfoEntry *specification_die = m_dwarf2Data->DebugInfo()->GetDIEPtr (specification_die_offset, NULL);
if (specification_die)
{
parent = specification_die->GetParent();
if (parent)
{
parent_tag = parent->Tag();
if (parent_tag == DW_TAG_class_type || parent_tag == DW_TAG_structure_type)
is_method = true;
}
}
}
}
}
if (is_method)
func_methods.Insert (ConstString(name), die.GetOffset());
else
func_basenames.Insert (ConstString(name), die.GetOffset());
if (!is_method && !mangled_cstr && !objc_method.IsValid(true))
func_fullnames.Insert (ConstString(name), die.GetOffset());
}
if (mangled_cstr)
{
// Make sure our mangled name isn't the same string table entry
// as our name. If it starts with '_', then it is ok, else compare
// the string to make sure it isn't the same and we don't end up
// with duplicate entries
if (name != mangled_cstr && ((mangled_cstr[0] == '_') || (name && ::strcmp(name, mangled_cstr) != 0)))
{
Mangled mangled (ConstString(mangled_cstr), true);
func_fullnames.Insert (mangled.GetMangledName(), die.GetOffset());
if (mangled.GetDemangledName())
func_fullnames.Insert (mangled.GetDemangledName(), die.GetOffset());
}
}
}
break;
case DW_TAG_inlined_subroutine:
if (has_address)
{
if (name)
func_basenames.Insert (ConstString(name), die.GetOffset());
if (mangled_cstr)
{
// Make sure our mangled name isn't the same string table entry
// as our name. If it starts with '_', then it is ok, else compare
// the string to make sure it isn't the same and we don't end up
// with duplicate entries
if (name != mangled_cstr && ((mangled_cstr[0] == '_') || (::strcmp(name, mangled_cstr) != 0)))
{
Mangled mangled (ConstString(mangled_cstr), true);
func_fullnames.Insert (mangled.GetMangledName(), die.GetOffset());
if (mangled.GetDemangledName())
func_fullnames.Insert (mangled.GetDemangledName(), die.GetOffset());
}
}
else
func_fullnames.Insert (ConstString(name), die.GetOffset());
}
break;
case DW_TAG_base_type:
case DW_TAG_class_type:
case DW_TAG_constant:
case DW_TAG_enumeration_type:
case DW_TAG_string_type:
case DW_TAG_subroutine_type:
case DW_TAG_structure_type:
case DW_TAG_union_type:
case DW_TAG_typedef:
case DW_TAG_unspecified_type:
if (name && is_declaration == false)
{
types.Insert (ConstString(name), die.GetOffset());
}
break;
case DW_TAG_namespace:
if (name)
namespaces.Insert (ConstString(name), die.GetOffset());
break;
case DW_TAG_variable:
if (name && has_location && is_global_or_static_variable)
{
globals.Insert (ConstString(name), die.GetOffset());
// Be sure to include variables by their mangled and demangled
// names if they have any since a variable can have a basename
// "i", a mangled named "_ZN12_GLOBAL__N_11iE" and a demangled
// mangled name "(anonymous namespace)::i"...
// Make sure our mangled name isn't the same string table entry
// as our name. If it starts with '_', then it is ok, else compare
// the string to make sure it isn't the same and we don't end up
// with duplicate entries
if (mangled_cstr && name != mangled_cstr && ((mangled_cstr[0] == '_') || (::strcmp(name, mangled_cstr) != 0)))
{
Mangled mangled (ConstString(mangled_cstr), true);
globals.Insert (mangled.GetMangledName(), die.GetOffset());
if (mangled.GetDemangledName())
globals.Insert (mangled.GetDemangledName(), die.GetOffset());
}
}
break;
default:
continue;
}
}
}