bool
DWARFFormValue::ExtractValue(const DWARFDataExtractor& data, lldb::offset_t* offset_ptr, const DWARFCompileUnit* cu)
{
bool indirect = false;
bool is_block = false;
m_value.data = NULL;
uint8_t ref_addr_size;
// Read the value for the form into value and follow and DW_FORM_indirect instances we run into
do
{
indirect = false;
switch (m_form)
{
case DW_FORM_addr: m_value.value.uval = data.GetMaxU64(offset_ptr, DWARFCompileUnit::GetAddressByteSize(cu)); break;
case DW_FORM_block2: m_value.value.uval = data.GetU16(offset_ptr); is_block = true; break;
case DW_FORM_block4: m_value.value.uval = data.GetU32(offset_ptr); is_block = true; break;
case DW_FORM_data2: m_value.value.uval = data.GetU16(offset_ptr); break;
case DW_FORM_data4: m_value.value.uval = data.GetU32(offset_ptr); break;
case DW_FORM_data8: m_value.value.uval = data.GetU64(offset_ptr); break;
case DW_FORM_string: m_value.value.cstr = data.GetCStr(offset_ptr);
// Set the string value to also be the data for inlined cstr form values only
// so we can tell the difference between DW_FORM_string and DW_FORM_strp form
// values;
m_value.data = (uint8_t*)m_value.value.cstr; break;
case DW_FORM_exprloc:
case DW_FORM_block: m_value.value.uval = data.GetULEB128(offset_ptr); is_block = true; break;
case DW_FORM_block1: m_value.value.uval = data.GetU8(offset_ptr); is_block = true; break;
case DW_FORM_data1: m_value.value.uval = data.GetU8(offset_ptr); break;
case DW_FORM_flag: m_value.value.uval = data.GetU8(offset_ptr); break;
case DW_FORM_sdata: m_value.value.sval = data.GetSLEB128(offset_ptr); break;
case DW_FORM_strp: m_value.value.uval = data.GetMaxU64(offset_ptr, DWARFCompileUnit::IsDWARF64(cu) ? 8 : 4); break;
// case DW_FORM_APPLE_db_str:
case DW_FORM_udata: m_value.value.uval = data.GetULEB128(offset_ptr); break;
case DW_FORM_ref_addr: ref_addr_size = 4;
if (cu) {
if (cu->GetVersion() <= 2)
ref_addr_size = cu->GetAddressByteSize();
else
ref_addr_size = cu->IsDWARF64() ? 8 : 4;
}
m_value.value.uval = data.GetMaxU64(offset_ptr, ref_addr_size); break;
case DW_FORM_ref1: m_value.value.uval = data.GetU8(offset_ptr); break;
case DW_FORM_ref2: m_value.value.uval = data.GetU16(offset_ptr); break;
case DW_FORM_ref4: m_value.value.uval = data.GetU32(offset_ptr); break;
case DW_FORM_ref8: m_value.value.uval = data.GetU64(offset_ptr); break;
case DW_FORM_ref_udata: m_value.value.uval = data.GetULEB128(offset_ptr); break;
case DW_FORM_indirect:
m_form = data.GetULEB128(offset_ptr);
indirect = true;
break;
case DW_FORM_sec_offset: m_value.value.uval = data.GetMaxU64(offset_ptr, DWARFCompileUnit::IsDWARF64(cu) ? 8 : 4); break;
case DW_FORM_flag_present: m_value.value.uval = 1; break;
case DW_FORM_ref_sig8: m_value.value.uval = data.GetU64(offset_ptr); break;
default:
return false;
break;
}
} while (indirect);
if (is_block)
{
m_value.data = data.PeekData(*offset_ptr, m_value.value.uval);
if (m_value.data != NULL)
{
*offset_ptr += m_value.value.uval;
}
}
return true;
}
bool DWARFFormValue::ExtractValue(const DWARFDataExtractor &data,
lldb::offset_t *offset_ptr) {
bool indirect = false;
bool is_block = false;
m_value.data = NULL;
uint8_t ref_addr_size;
// Read the value for the form into value and follow and DW_FORM_indirect
// instances we run into
do {
indirect = false;
switch (m_form) {
case DW_FORM_addr:
assert(m_cu);
m_value.value.uval = data.GetMaxU64(
offset_ptr, DWARFCompileUnit::GetAddressByteSize(m_cu));
break;
case DW_FORM_block2:
m_value.value.uval = data.GetU16(offset_ptr);
is_block = true;
break;
case DW_FORM_block4:
m_value.value.uval = data.GetU32(offset_ptr);
is_block = true;
break;
case DW_FORM_data2:
m_value.value.uval = data.GetU16(offset_ptr);
break;
case DW_FORM_data4:
m_value.value.uval = data.GetU32(offset_ptr);
break;
case DW_FORM_data8:
m_value.value.uval = data.GetU64(offset_ptr);
break;
case DW_FORM_string:
m_value.value.cstr = data.GetCStr(offset_ptr);
break;
case DW_FORM_exprloc:
case DW_FORM_block:
m_value.value.uval = data.GetULEB128(offset_ptr);
is_block = true;
break;
case DW_FORM_block1:
m_value.value.uval = data.GetU8(offset_ptr);
is_block = true;
break;
case DW_FORM_data1:
m_value.value.uval = data.GetU8(offset_ptr);
break;
case DW_FORM_flag:
m_value.value.uval = data.GetU8(offset_ptr);
break;
case DW_FORM_sdata:
m_value.value.sval = data.GetSLEB128(offset_ptr);
break;
case DW_FORM_strp:
assert(m_cu);
m_value.value.uval =
data.GetMaxU64(offset_ptr, DWARFCompileUnit::IsDWARF64(m_cu) ? 8 : 4);
break;
// case DW_FORM_APPLE_db_str:
case DW_FORM_udata:
m_value.value.uval = data.GetULEB128(offset_ptr);
break;
case DW_FORM_ref_addr:
assert(m_cu);
ref_addr_size = 4;
if (m_cu->GetVersion() <= 2)
ref_addr_size = m_cu->GetAddressByteSize();
else
ref_addr_size = m_cu->IsDWARF64() ? 8 : 4;
m_value.value.uval = data.GetMaxU64(offset_ptr, ref_addr_size);
break;
case DW_FORM_ref1:
m_value.value.uval = data.GetU8(offset_ptr);
break;
case DW_FORM_ref2:
m_value.value.uval = data.GetU16(offset_ptr);
break;
case DW_FORM_ref4:
m_value.value.uval = data.GetU32(offset_ptr);
break;
case DW_FORM_ref8:
m_value.value.uval = data.GetU64(offset_ptr);
break;
case DW_FORM_ref_udata:
m_value.value.uval = data.GetULEB128(offset_ptr);
break;
case DW_FORM_indirect:
m_form = data.GetULEB128(offset_ptr);
indirect = true;
break;
case DW_FORM_sec_offset:
assert(m_cu);
m_value.value.uval =
data.GetMaxU64(offset_ptr, DWARFCompileUnit::IsDWARF64(m_cu) ? 8 : 4);
break;
case DW_FORM_flag_present:
m_value.value.uval = 1;
break;
case DW_FORM_ref_sig8:
m_value.value.uval = data.GetU64(offset_ptr);
break;
case DW_FORM_GNU_str_index:
m_value.value.uval = data.GetULEB128(offset_ptr);
break;
case DW_FORM_GNU_addr_index:
m_value.value.uval = data.GetULEB128(offset_ptr);
break;
default:
return false;
break;
}
} while (indirect);
if (is_block) {
m_value.data = data.PeekData(*offset_ptr, m_value.value.uval);
if (m_value.data != NULL) {
*offset_ptr += m_value.value.uval;
}
}
return true;
}
