SystemRuntimeMacOSX::ItemInfo
SystemRuntimeMacOSX::ExtractItemInfoFromBuffer (lldb_private::DataExtractor &extractor)
{
ItemInfo item;
offset_t offset = 0;
item.item_that_enqueued_this = extractor.GetPointer (&offset);
item.function_or_block = extractor.GetPointer (&offset);
item.enqueuing_thread_id = extractor.GetU64 (&offset);
item.enqueuing_queue_serialnum = extractor.GetU64 (&offset);
item.target_queue_serialnum = extractor.GetU64 (&offset);
item.enqueuing_callstack_frame_count = extractor.GetU32 (&offset);
item.stop_id = extractor.GetU32 (&offset);
offset = m_lib_backtrace_recording_info.item_info_data_offset;
for (uint32_t i = 0; i < item.enqueuing_callstack_frame_count; i++)
{
item.enqueuing_callstack.push_back (extractor.GetPointer (&offset));
}
item.enqueuing_thread_label = extractor.GetCStr (&offset);
item.enqueuing_queue_label = extractor.GetCStr (&offset);
item.target_queue_label = extractor.GetCStr (&offset);
return item;
}
bool
ELFSymbol::Parse(const lldb_private::DataExtractor &data, lldb::offset_t *offset)
{
const unsigned byte_size = data.GetAddressByteSize();
const bool parsing_32 = byte_size == 4;
// Read st_name.
if (data.GetU32(offset, &st_name, 1) == NULL)
return false;
if (parsing_32)
{
// Read st_value and st_size.
if (GetMaxU64(data, offset, &st_value, byte_size, 2) == false)
return false;
// Read st_info and st_other.
if (data.GetU8(offset, &st_info, 2) == NULL)
return false;
// Read st_shndx.
if (data.GetU16(offset, &st_shndx, 1) == NULL)
return false;
}
else
{
// Read st_info and st_other.
if (data.GetU8(offset, &st_info, 2) == NULL)
return false;
// Read st_shndx.
if (data.GetU16(offset, &st_shndx, 1) == NULL)
return false;
// Read st_value and st_size.
if (data.GetU64(offset, &st_value, 2) == NULL)
return false;
}
return true;
}
virtual size_t
Decode (const lldb_private::Disassembler &disassembler,
const lldb_private::DataExtractor &data,
lldb::offset_t data_offset)
{
// All we have to do is read the opcode which can be easy for some
// architectures
bool got_op = false;
DisassemblerLLVMC &llvm_disasm = GetDisassemblerLLVMC();
const ArchSpec &arch = llvm_disasm.GetArchitecture();
const lldb::ByteOrder byte_order = data.GetByteOrder();
const uint32_t min_op_byte_size = arch.GetMinimumOpcodeByteSize();
const uint32_t max_op_byte_size = arch.GetMaximumOpcodeByteSize();
if (min_op_byte_size == max_op_byte_size)
{
// Fixed size instructions, just read that amount of data.
if (!data.ValidOffsetForDataOfSize(data_offset, min_op_byte_size))
return false;
switch (min_op_byte_size)
{
case 1:
m_opcode.SetOpcode8 (data.GetU8 (&data_offset), byte_order);
got_op = true;
break;
case 2:
m_opcode.SetOpcode16 (data.GetU16 (&data_offset), byte_order);
got_op = true;
break;
case 4:
m_opcode.SetOpcode32 (data.GetU32 (&data_offset), byte_order);
got_op = true;
break;
case 8:
m_opcode.SetOpcode64 (data.GetU64 (&data_offset), byte_order);
got_op = true;
break;
default:
m_opcode.SetOpcodeBytes(data.PeekData(data_offset, min_op_byte_size), min_op_byte_size);
got_op = true;
break;
}
}
if (!got_op)
{
bool is_alternate_isa = false;
DisassemblerLLVMC::LLVMCDisassembler *mc_disasm_ptr = GetDisasmToUse (is_alternate_isa);
const llvm::Triple::ArchType machine = arch.GetMachine();
if (machine == llvm::Triple::arm || machine == llvm::Triple::thumb)
{
if (machine == llvm::Triple::thumb || is_alternate_isa)
{
uint32_t thumb_opcode = data.GetU16(&data_offset);
if ((thumb_opcode & 0xe000) != 0xe000 || ((thumb_opcode & 0x1800u) == 0))
{
m_opcode.SetOpcode16 (thumb_opcode, byte_order);
m_is_valid = true;
}
else
{
thumb_opcode <<= 16;
thumb_opcode |= data.GetU16(&data_offset);
m_opcode.SetOpcode16_2 (thumb_opcode, byte_order);
m_is_valid = true;
}
}
else
{
m_opcode.SetOpcode32 (data.GetU32(&data_offset), byte_order);
m_is_valid = true;
}
}
else
{
// The opcode isn't evenly sized, so we need to actually use the llvm
// disassembler to parse it and get the size.
uint8_t *opcode_data = const_cast<uint8_t *>(data.PeekData (data_offset, 1));
const size_t opcode_data_len = data.BytesLeft(data_offset);
const addr_t pc = m_address.GetFileAddress();
llvm::MCInst inst;
llvm_disasm.Lock(this, NULL);
const size_t inst_size = mc_disasm_ptr->GetMCInst(opcode_data,
opcode_data_len,
pc,
inst);
llvm_disasm.Unlock();
if (inst_size == 0)
m_opcode.Clear();
else
{
m_opcode.SetOpcodeBytes(opcode_data, inst_size);
m_is_valid = true;
}
}
}
return m_opcode.GetByteSize();
}
virtual size_t
Decode (const lldb_private::Disassembler &disassembler,
const lldb_private::DataExtractor &data,
uint32_t data_offset)
{
// All we have to do is read the opcode which can be easy for some
// architetures
bool got_op = false;
const ArchSpec &arch = m_disasm.GetArchitecture();
const uint32_t min_op_byte_size = arch.GetMinimumOpcodeByteSize();
const uint32_t max_op_byte_size = arch.GetMaximumOpcodeByteSize();
if (min_op_byte_size == max_op_byte_size)
{
// Fixed size instructions, just read that amount of data.
if (!data.ValidOffsetForDataOfSize(data_offset, min_op_byte_size))
return false;
switch (min_op_byte_size)
{
case 1:
m_opcode.SetOpcode8 (data.GetU8 (&data_offset));
got_op = true;
break;
case 2:
m_opcode.SetOpcode16 (data.GetU16 (&data_offset));
got_op = true;
break;
case 4:
m_opcode.SetOpcode32 (data.GetU32 (&data_offset));
got_op = true;
break;
case 8:
m_opcode.SetOpcode64 (data.GetU64 (&data_offset));
got_op = true;
break;
default:
m_opcode.SetOpcodeBytes(data.PeekData(data_offset, min_op_byte_size), min_op_byte_size);
got_op = true;
break;
}
}
if (!got_op)
{
::LLVMDisasmContextRef disasm_context = m_disasm.m_disasm_context;
bool is_altnernate_isa = false;
if (m_disasm.m_alternate_disasm_context)
{
const AddressClass address_class = GetAddressClass ();
if (address_class == eAddressClassCodeAlternateISA)
{
disasm_context = m_disasm.m_alternate_disasm_context;
is_altnernate_isa = true;
}
}
const llvm::Triple::ArchType machine = arch.GetMachine();
if (machine == llvm::Triple::arm || machine == llvm::Triple::thumb)
{
if (machine == llvm::Triple::thumb || is_altnernate_isa)
{
uint32_t thumb_opcode = data.GetU16(&data_offset);
if ((thumb_opcode & 0xe000) != 0xe000 || ((thumb_opcode & 0x1800u) == 0))
{
m_opcode.SetOpcode16 (thumb_opcode);
}
else
{
thumb_opcode <<= 16;
thumb_opcode |= data.GetU16(&data_offset);
m_opcode.SetOpcode32 (thumb_opcode);
m_is_valid = true;
}
}
else
{
m_opcode.SetOpcode32 (data.GetU32(&data_offset));
}
}
else
{
// The opcode isn't evenly sized, so we need to actually use the llvm
// disassembler to parse it and get the size.
char out_string[512];
m_disasm.Lock(this, NULL);
uint8_t *opcode_data = const_cast<uint8_t *>(data.PeekData (data_offset, 1));
const size_t opcode_data_len = data.GetByteSize() - data_offset;
const addr_t pc = m_address.GetFileAddress();
const size_t inst_size = ::LLVMDisasmInstruction (disasm_context,
opcode_data,
opcode_data_len,
pc, // PC value
out_string,
sizeof(out_string));
// The address lookup function could have caused us to fill in our comment
m_comment.clear();
m_disasm.Unlock();
if (inst_size == 0)
m_opcode.Clear();
else
{
m_opcode.SetOpcodeBytes(opcode_data, inst_size);
m_is_valid = true;
}
}
}
return m_opcode.GetByteSize();
}
bool
CompilerType::GetValueAsScalar (const lldb_private::DataExtractor &data,
lldb::offset_t data_byte_offset,
size_t data_byte_size,
Scalar &value) const
{
if (!IsValid())
return false;
if (0 == (GetTypeInfo() & eTypeHasValue))
{
return false; // Aggregate types don't have scalar values
}
else
{
uint64_t count = 0;
lldb::Encoding encoding = GetEncoding (count);
if (encoding == lldb::eEncodingInvalid || count != 1)
return false;
const uint64_t byte_size = GetByteSize(nullptr);
lldb::offset_t offset = data_byte_offset;
switch (encoding)
{
case lldb::eEncodingInvalid:
break;
case lldb::eEncodingVector:
break;
case lldb::eEncodingUint:
if (byte_size <= sizeof(unsigned long long))
{
uint64_t uval64 = data.GetMaxU64 (&offset, byte_size);
if (byte_size <= sizeof(unsigned int))
{
value = (unsigned int)uval64;
return true;
}
else if (byte_size <= sizeof(unsigned long))
{
value = (unsigned long)uval64;
return true;
}
else if (byte_size <= sizeof(unsigned long long))
{
value = (unsigned long long )uval64;
return true;
}
else
value.Clear();
}
break;
case lldb::eEncodingSint:
if (byte_size <= sizeof(long long))
{
int64_t sval64 = data.GetMaxS64 (&offset, byte_size);
if (byte_size <= sizeof(int))
{
value = (int)sval64;
return true;
}
else if (byte_size <= sizeof(long))
{
value = (long)sval64;
return true;
}
else if (byte_size <= sizeof(long long))
{
value = (long long )sval64;
return true;
}
else
value.Clear();
}
break;
case lldb::eEncodingIEEE754:
if (byte_size <= sizeof(long double))
{
uint32_t u32;
uint64_t u64;
if (byte_size == sizeof(float))
{
if (sizeof(float) == sizeof(uint32_t))
{
u32 = data.GetU32(&offset);
value = *((float *)&u32);
return true;
}
else if (sizeof(float) == sizeof(uint64_t))
{
u64 = data.GetU64(&offset);
value = *((float *)&u64);
return true;
}
}
else
if (byte_size == sizeof(double))
{
if (sizeof(double) == sizeof(uint32_t))
{
u32 = data.GetU32(&offset);
value = *((double *)&u32);
return true;
}
else if (sizeof(double) == sizeof(uint64_t))
{
u64 = data.GetU64(&offset);
value = *((double *)&u64);
return true;
}
}
else
if (byte_size == sizeof(long double))
{
if (sizeof(long double) == sizeof(uint32_t))
{
u32 = data.GetU32(&offset);
value = *((long double *)&u32);
return true;
}
else if (sizeof(long double) == sizeof(uint64_t))
{
u64 = data.GetU64(&offset);
value = *((long double *)&u64);
return true;
}
}
}
break;
}
}
return false;
}