static void LLVM_ATTRIBUTE_UNUSED dumpDataAux(DataExtractor Data,
uint32_t Offset, int Length) {
errs() << "DUMP: ";
for (int i = 0; i < Length; ++i) {
uint8_t c = Data.getU8(&Offset);
errs().write_hex(c);
errs() << " ";
}
errs() << "\n";
}
bool
Type::ReadFromMemory (ExecutionContext *exe_ctx, lldb::addr_t addr, AddressType address_type, DataExtractor &data)
{
if (address_type == eAddressTypeFile)
{
// Can't convert a file address to anything valid without more
// context (which Module it came from)
return false;
}
const uint64_t byte_size = GetByteSize();
if (data.GetByteSize() < byte_size)
{
lldb::DataBufferSP data_sp(new DataBufferHeap (byte_size, '\0'));
data.SetData(data_sp);
}
uint8_t* dst = (uint8_t*)data.PeekData(0, byte_size);
if (dst != nullptr)
{
if (address_type == eAddressTypeHost)
{
// The address is an address in this process, so just copy it
if (addr == 0)
return false;
memcpy (dst, (uint8_t*)nullptr + addr, byte_size);
return true;
}
else
{
if (exe_ctx)
{
Process *process = exe_ctx->GetProcessPtr();
if (process)
{
Error error;
return exe_ctx->GetProcessPtr()->ReadMemory(addr, dst, byte_size, error) == byte_size;
}
}
}
}
return false;
}
bool DWARFUnit::extractImpl(DataExtractor debug_info, uint32_t *offset_ptr) {
Length = debug_info.getU32(offset_ptr);
Version = debug_info.getU16(offset_ptr);
uint64_t AbbrOffset = debug_info.getU32(offset_ptr);
AddrSize = debug_info.getU8(offset_ptr);
bool LengthOK = debug_info.isValidOffset(getNextUnitOffset() - 1);
bool VersionOK = DWARFContext::isSupportedVersion(Version);
bool AddrSizeOK = AddrSize == 4 || AddrSize == 8;
if (!LengthOK || !VersionOK || !AddrSizeOK)
return false;
Abbrevs = Abbrev->getAbbreviationDeclarationSet(AbbrOffset);
if (Abbrevs == nullptr)
return false;
return true;
}
static size_t
ReadCStringFromMemory (ExecutionContextScope *exe_scope, const Address &address, Stream *strm)
{
if (exe_scope == NULL)
return 0;
const size_t k_buf_len = 256;
char buf[k_buf_len+1];
buf[k_buf_len] = '\0'; // NULL terminate
// Byte order and address size don't matter for C string dumping..
DataExtractor data (buf, sizeof(buf), lldb::endian::InlHostByteOrder(), 4);
size_t total_len = 0;
size_t bytes_read;
Address curr_address(address);
strm->PutChar ('"');
while ((bytes_read = ReadBytes (exe_scope, curr_address, buf, k_buf_len)) > 0)
{
size_t len = strlen(buf);
if (len == 0)
break;
if (len > bytes_read)
len = bytes_read;
data.Dump (strm,
0, // Start offset in "data"
eFormatChar, // Print as characters
1, // Size of item (1 byte for a char!)
len, // How many bytes to print?
UINT32_MAX, // num per line
LLDB_INVALID_ADDRESS,// base address
0, // bitfield bit size
0); // bitfield bit offset
total_len += bytes_read;
if (len < k_buf_len)
break;
curr_address.SetOffset (curr_address.GetOffset() + bytes_read);
}
strm->PutChar ('"');
return total_len;
}
bool DWARFDebugInfoEntry::extractFast(const DWARFUnit &U, uint32_t *OffsetPtr,
const DataExtractor &DebugInfoData,
uint32_t UEndOffset, uint32_t D) {
Offset = *OffsetPtr;
Depth = D;
if (Offset >= UEndOffset || !DebugInfoData.isValidOffset(Offset))
return false;
uint64_t AbbrCode = DebugInfoData.getULEB128(OffsetPtr);
if (0 == AbbrCode) {
// NULL debug tag entry.
AbbrevDecl = nullptr;
return true;
}
AbbrevDecl = U.getAbbreviations()->getAbbreviationDeclaration(AbbrCode);
if (nullptr == AbbrevDecl) {
// Restore the original offset.
*OffsetPtr = Offset;
return false;
}
// See if all attributes in this DIE have fixed byte sizes. If so, we can
// just add this size to the offset to skip to the next DIE.
if (Optional<size_t> FixedSize = AbbrevDecl->getFixedAttributesByteSize(U)) {
*OffsetPtr += *FixedSize;
return true;
}
// Skip all data in the .debug_info for the attributes
for (const auto &AttrSpec : AbbrevDecl->attributes()) {
// Check if this attribute has a fixed byte size.
if (auto FixedSize = AttrSpec.getByteSize(U)) {
// Attribute byte size if fixed, just add the size to the offset.
*OffsetPtr += *FixedSize;
} else if (!DWARFFormValue::skipValue(AttrSpec.Form, DebugInfoData,
OffsetPtr, &U)) {
// We failed to skip this attribute's value, restore the original offset
// and return the failure status.
*OffsetPtr = Offset;
return false;
}
}
return true;
}
static bool GetAPInt(const DataExtractor &data, lldb::offset_t *offset_ptr,
lldb::offset_t byte_size, llvm::APInt &result) {
llvm::SmallVector<uint64_t, 2> uint64_array;
lldb::offset_t bytes_left = byte_size;
uint64_t u64;
const lldb::ByteOrder byte_order = data.GetByteOrder();
if (byte_order == lldb::eByteOrderLittle) {
while (bytes_left > 0) {
if (bytes_left >= 8) {
u64 = data.GetU64(offset_ptr);
bytes_left -= 8;
} else {
u64 = data.GetMaxU64(offset_ptr, (uint32_t)bytes_left);
bytes_left = 0;
}
uint64_array.push_back(u64);
}
result = llvm::APInt(byte_size * 8, llvm::ArrayRef<uint64_t>(uint64_array));
return true;
} else if (byte_order == lldb::eByteOrderBig) {
lldb::offset_t be_offset = *offset_ptr + byte_size;
lldb::offset_t temp_offset;
while (bytes_left > 0) {
if (bytes_left >= 8) {
be_offset -= 8;
temp_offset = be_offset;
u64 = data.GetU64(&temp_offset);
bytes_left -= 8;
} else {
be_offset -= bytes_left;
temp_offset = be_offset;
u64 = data.GetMaxU64(&temp_offset, (uint32_t)bytes_left);
bytes_left = 0;
}
uint64_array.push_back(u64);
}
*offset_ptr += byte_size;
result = llvm::APInt(byte_size * 8, llvm::ArrayRef<uint64_t>(uint64_array));
return true;
}
return false;
}
bool
ObjectContainerBSDArchive::MagicBytesMatch (const DataExtractor &data)
{
uint32_t offset = 0;
const char* armag = (const char* )data.PeekData (offset, sizeof(ar_hdr));
if (armag && ::strncmp(armag, ARMAG, SARMAG) == 0)
{
armag += offsetof(struct ar_hdr, ar_fmag) + SARMAG;
if (strncmp(armag, ARFMAG, 2) == 0)
return true;
}
ObjectContainer *ObjectContainerUniversalMachO::CreateInstance(
const lldb::ModuleSP &module_sp, DataBufferSP &data_sp,
lldb::offset_t data_offset, const FileSpec *file,
lldb::offset_t file_offset, lldb::offset_t length) {
// We get data when we aren't trying to look for cached container information,
// so only try and look for an architecture slice if we get data
if (data_sp) {
DataExtractor data;
data.SetData(data_sp, data_offset, length);
if (ObjectContainerUniversalMachO::MagicBytesMatch(data)) {
std::unique_ptr<ObjectContainerUniversalMachO> container_ap(
new ObjectContainerUniversalMachO(module_sp, data_sp, data_offset,
file, file_offset, length));
if (container_ap->ParseHeader()) {
return container_ap.release();
}
}
}
return NULL;
}
RegisterContextCorePOSIX_x86_64::RegisterContextCorePOSIX_x86_64(
Thread &thread, RegisterInfoInterface *register_info,
const DataExtractor &gpregset, const DataExtractor &fpregset)
: RegisterContextPOSIX_x86(thread, 0, register_info) {
size_t size, len;
size = GetGPRSize();
m_gpregset.reset(new uint8_t[size]);
len =
gpregset.ExtractBytes(0, size, lldb::eByteOrderLittle, m_gpregset.get());
if (len != size)
m_gpregset.reset();
size = sizeof(FXSAVE);
m_fpregset.reset(new uint8_t[size]);
len =
fpregset.ExtractBytes(0, size, lldb::eByteOrderLittle, m_fpregset.get());
if (len != size)
m_fpregset.reset();
}
lldb::offset_t
ObjectContainerBSDArchive::Object::Extract (const DataExtractor& data, lldb::offset_t offset)
{
size_t ar_name_len = 0;
std::string str;
char *err;
str.assign ((const char *)data.GetData(&offset, 16), 16);
if (str.find("#1/") == 0)
{
// If the name is longer than 16 bytes, or contains an embedded space
// then it will use this format where the length of the name is
// here and the name characters are after this header.
ar_name_len = strtoul(str.c_str() + 3, &err, 10);
}
else
{
// Strip off any spaces (if the object file name contains spaces it
// will use the extended format above).
str.erase (str.find(' '));
ar_name.SetCString(str.c_str());
}
str.assign ((const char *)data.GetData(&offset, 12), 12);
ar_date = strtoul(str.c_str(), &err, 10);
str.assign ((const char *)data.GetData(&offset, 6), 6);
ar_uid = strtoul(str.c_str(), &err, 10);
str.assign ((const char *)data.GetData(&offset, 6), 6);
ar_gid = strtoul(str.c_str(), &err, 10);
str.assign ((const char *)data.GetData(&offset, 8), 8);
ar_mode = strtoul(str.c_str(), &err, 8);
str.assign ((const char *)data.GetData(&offset, 10), 10);
ar_size = strtoul(str.c_str(), &err, 10);
str.assign ((const char *)data.GetData(&offset, 2), 2);
if (str == ARFMAG)
{
if (ar_name_len > 0)
{
str.assign ((const char *)data.GetData(&offset, ar_name_len), ar_name_len);
ar_name.SetCString (str.c_str());
}
ar_file_offset = offset;
ar_file_size = ar_size - ar_name_len;
return offset;
}
return LLDB_INVALID_OFFSET;
}
size_t
Disassembler::ParseInstructions
(
const ExecutionContext *exe_ctx,
const AddressRange &range,
DataExtractor& data
)
{
Target *target = exe_ctx->target;
const addr_t byte_size = range.GetByteSize();
if (target == NULL || byte_size == 0 || !range.GetBaseAddress().IsValid())
return 0;
DataBufferHeap *heap_buffer = new DataBufferHeap (byte_size, '\0');
DataBufferSP data_sp(heap_buffer);
Error error;
const size_t bytes_read = target->ReadMemory (range.GetBaseAddress(), heap_buffer->GetBytes(), heap_buffer->GetByteSize(), error);
if (bytes_read > 0)
{
if (bytes_read != heap_buffer->GetByteSize())
heap_buffer->SetByteSize (bytes_read);
data.SetData(data_sp);
if (exe_ctx->process)
{
data.SetByteOrder(exe_ctx->process->GetByteOrder());
data.SetAddressByteSize(exe_ctx->process->GetAddressByteSize());
}
else
{
data.SetByteOrder(target->GetArchitecture().GetDefaultEndian());
data.SetAddressByteSize(target->GetArchitecture().GetAddressByteSize());
}
return DecodeInstructions (data, 0, UINT32_MAX);
}
return 0;
}
size_t ObjectFilePECOFF::GetModuleSpecifications(
const lldb_private::FileSpec &file, lldb::DataBufferSP &data_sp,
lldb::offset_t data_offset, lldb::offset_t file_offset,
lldb::offset_t length, lldb_private::ModuleSpecList &specs) {
const size_t initial_count = specs.GetSize();
if (ObjectFilePECOFF::MagicBytesMatch(data_sp)) {
DataExtractor data;
data.SetData(data_sp, data_offset, length);
data.SetByteOrder(eByteOrderLittle);
dos_header_t dos_header;
coff_header_t coff_header;
if (ParseDOSHeader(data, dos_header)) {
lldb::offset_t offset = dos_header.e_lfanew;
uint32_t pe_signature = data.GetU32(&offset);
if (pe_signature != IMAGE_NT_SIGNATURE)
return false;
if (ParseCOFFHeader(data, &offset, coff_header)) {
ArchSpec spec;
if (coff_header.machine == MachineAmd64) {
spec.SetTriple("x86_64-pc-windows");
specs.Append(ModuleSpec(file, spec));
} else if (coff_header.machine == MachineX86) {
spec.SetTriple("i386-pc-windows");
specs.Append(ModuleSpec(file, spec));
spec.SetTriple("i686-pc-windows");
specs.Append(ModuleSpec(file, spec));
}
else if (coff_header.machine == MachineArmNt)
{
spec.SetTriple("arm-pc-windows");
specs.Append(ModuleSpec(file, spec));
}
}
}
}
return specs.GetSize() - initial_count;
}
//----------------------------------------------------------------------
// Get the section data from a complete contiguous copy of the
// entire executable image.
//----------------------------------------------------------------------
size_t
Section::GetSectionDataFromImage (const DataExtractor& image_data, DataExtractor& section_data) const
{
size_t file_size = GetByteSize();
if (file_size > 0)
{
off_t file_offset = GetFileOffset();
if (section_data.SetData (image_data, file_offset, file_size) == file_size)
return true;
}
return false;
}
Scalar &
Value::ResolveValue(ExecutionContext *exe_ctx, clang::ASTContext *ast_context)
{
void *opaque_clang_qual_type = GetClangType();
if (opaque_clang_qual_type)
{
switch (m_value_type)
{
case eValueTypeScalar: // raw scalar value
break;
default:
case eValueTypeFileAddress:
m_value.Clear();
break;
case eValueTypeLoadAddress: // load address value
case eValueTypeHostAddress: // host address value (for memory in the process that is using liblldb)
{
AddressType address_type = m_value_type == eValueTypeLoadAddress ? eAddressTypeLoad : eAddressTypeHost;
lldb::addr_t addr = m_value.ULongLong(LLDB_INVALID_ADDRESS);
DataExtractor data;
if (ClangASTType::ReadFromMemory (ast_context, opaque_clang_qual_type, exe_ctx, addr, address_type, data))
{
Scalar scalar;
if (ClangASTType::GetValueAsScalar (ast_context, opaque_clang_qual_type, data, 0, data.GetByteSize(), scalar))
{
m_value = scalar;
m_value_type = eValueTypeScalar;
}
else
{
if ((uintptr_t)addr != (uintptr_t)m_data_buffer.GetBytes())
{
m_value.Clear();
m_value_type = eValueTypeScalar;
}
}
}
else
{
if ((uintptr_t)addr != (uintptr_t)m_data_buffer.GetBytes())
{
m_value.Clear();
m_value_type = eValueTypeScalar;
}
}
}
break;
}
}
return m_value;
}
/// State transition when a NewBufferRecord is encountered.
Error processFDRNewBufferRecord(FDRState &State, uint8_t RecordFirstByte,
DataExtractor &RecordExtractor) {
if (State.Expects != FDRState::Token::NEW_BUFFER_RECORD_OR_EOF)
return make_error<StringError>(
"Malformed log. Read New Buffer record kind out of sequence",
std::make_error_code(std::errc::executable_format_error));
uint32_t OffsetPtr = 1; // 1 byte into record.
State.ThreadId = RecordExtractor.getU16(&OffsetPtr);
State.Expects = FDRState::Token::WALLCLOCK_RECORD;
return Error::success();
}
void DWARFDebugAbbrev::extract(DataExtractor Data) {
clear();
uint32_t Offset = 0;
DWARFAbbreviationDeclarationSet AbbrDecls;
while (Data.isValidOffset(Offset)) {
uint32_t CUAbbrOffset = Offset;
if (!AbbrDecls.extract(Data, &Offset))
break;
AbbrDeclSets[CUAbbrOffset] = std::move(AbbrDecls);
}
}
bool
DWARFCompileUnit::Extract(const DataExtractor &debug_info, uint32_t* offset_ptr)
{
Clear();
m_offset = *offset_ptr;
if (debug_info.ValidOffset(*offset_ptr))
{
dw_offset_t abbr_offset;
const DWARFDebugAbbrev *abbr = m_dwarf2Data->DebugAbbrev();
m_length = debug_info.GetU32(offset_ptr);
m_version = debug_info.GetU16(offset_ptr);
abbr_offset = debug_info.GetU32(offset_ptr);
m_addr_size = debug_info.GetU8 (offset_ptr);
bool length_OK = debug_info.ValidOffset(GetNextCompileUnitOffset()-1);
bool version_OK = SymbolFileDWARF::SupportedVersion(m_version);
bool abbr_offset_OK = m_dwarf2Data->get_debug_abbrev_data().ValidOffset(abbr_offset);
bool addr_size_OK = ((m_addr_size == 4) || (m_addr_size == 8));
if (length_OK && version_OK && addr_size_OK && abbr_offset_OK && abbr != NULL)
{
m_abbrevs = abbr->GetAbbreviationDeclarationSet(abbr_offset);
return true;
}
// reset the offset to where we tried to parse from if anything went wrong
*offset_ptr = m_offset;
}
return false;
}
bool
DWARFDebugMacinfoEntry::Extract(const DataExtractor& mac_info_data, dw_offset_t* offset_ptr)
{
if (mac_info_data.ValidOffset(*offset_ptr))
{
m_type_code = mac_info_data.GetU8(offset_ptr);
switch (m_type_code)
{
case DW_MACINFO_define:
case DW_MACINFO_undef:
// 2 operands:
// Arg 1: operand encodes the line number of the source line on which
// the relevant defining or undefining pre-processor directives
// appeared.
m_line = mac_info_data.GetULEB128(offset_ptr);
// Arg 2: define string
m_op2.cstr = mac_info_data.GetCStr(offset_ptr);
break;
case DW_MACINFO_start_file:
// 2 operands:
// Op 1: line number of the source line on which the inclusion
// pre-processor directive occurred.
m_line = mac_info_data.GetULEB128(offset_ptr);
// Op 2: a source file name index to a file number in the statement
// information table for the relevant compilation unit.
m_op2.file_idx = mac_info_data.GetULEB128(offset_ptr);
break;
case 0: // End of list
case DW_MACINFO_end_file:
// No operands
m_line = DW_INVALID_OFFSET;
m_op2.cstr = NULL;
break;
default:
// Vendor specific entries always have a ULEB128 and a string
m_line = mac_info_data.GetULEB128(offset_ptr);
m_op2.cstr = mac_info_data.GetCStr(offset_ptr);
break;
}
return true;
}
else
m_type_code = 0;
return false;
}
void DWARFDebugLocDWO::parse(DataExtractor data) {
uint32_t Offset = 0;
while (data.isValidOffset(Offset)) {
Locations.resize(Locations.size() + 1);
LocationList &Loc = Locations.back();
Loc.Offset = Offset;
dwarf::LocationListEntry Kind;
while ((Kind = static_cast<dwarf::LocationListEntry>(
data.getU8(&Offset))) != dwarf::DW_LLE_end_of_list) {
if (Kind != dwarf::DW_LLE_startx_length) {
llvm::errs() << "error: dumping support for LLE of kind " << (int)Kind
<< " not implemented\n";
return;
}
Entry E;
E.Start = data.getULEB128(&Offset);
E.Length = data.getU32(&Offset);
unsigned Bytes = data.getU16(&Offset);
// A single location description describing the location of the object...
StringRef str = data.getData().substr(Offset, Bytes);
Offset += Bytes;
E.Loc.resize(str.size());
std::copy(str.begin(), str.end(), E.Loc.begin());
Loc.Entries.push_back(std::move(E));
}
}
}
bool DWARFCompileUnit::extract(DataExtractor debug_info, uint32_t *offset_ptr) {
clear();
Offset = *offset_ptr;
if (debug_info.isValidOffset(*offset_ptr)) {
uint64_t abbrOffset;
Length = debug_info.getU32(offset_ptr);
Version = debug_info.getU16(offset_ptr);
abbrOffset = debug_info.getU32(offset_ptr);
AddrSize = debug_info.getU8(offset_ptr);
bool lengthOK = debug_info.isValidOffset(getNextCompileUnitOffset()-1);
bool versionOK = DWARFContext::isSupportedVersion(Version);
bool abbrOffsetOK = AbbrevSection.size() > abbrOffset;
bool addrSizeOK = AddrSize == 4 || AddrSize == 8;
if (lengthOK && versionOK && addrSizeOK && abbrOffsetOK && Abbrev != NULL) {
Abbrevs = Abbrev->getAbbreviationDeclarationSet(abbrOffset);
return true;
}
// reset the offset to where we tried to parse from if anything went wrong
*offset_ptr = Offset;
}
return false;
}
RegisterContextCorePOSIX_powerpc::RegisterContextCorePOSIX_powerpc(
Thread &thread, RegisterInfoInterface *register_info,
const DataExtractor &gpregset, const DataExtractor &fpregset,
const DataExtractor &vregset)
: RegisterContextPOSIX_powerpc(thread, 0, register_info) {
m_gpr_buffer.reset(
new DataBufferHeap(gpregset.GetDataStart(), gpregset.GetByteSize()));
m_gpr.SetData(m_gpr_buffer);
m_gpr.SetByteOrder(gpregset.GetByteOrder());
m_fpr_buffer.reset(
new DataBufferHeap(fpregset.GetDataStart(), fpregset.GetByteSize()));
m_fpr.SetData(m_fpr_buffer);
m_fpr.SetByteOrder(fpregset.GetByteOrder());
m_vec_buffer.reset(
new DataBufferHeap(vregset.GetDataStart(), vregset.GetByteSize()));
m_vec.SetData(m_vec_buffer);
m_vec.SetByteOrder(vregset.GetByteOrder());
}
Scalar &Value::ResolveValue(ExecutionContext *exe_ctx) {
const CompilerType &compiler_type = GetCompilerType();
if (compiler_type.IsValid()) {
switch (m_value_type) {
case eValueTypeScalar: // raw scalar value
break;
default:
case eValueTypeFileAddress:
case eValueTypeLoadAddress: // load address value
case eValueTypeHostAddress: // host address value (for memory in the process
// that is using liblldb)
{
DataExtractor data;
lldb::addr_t addr = m_value.ULongLong(LLDB_INVALID_ADDRESS);
Status error(GetValueAsData(exe_ctx, data, 0, NULL));
if (error.Success()) {
Scalar scalar;
if (compiler_type.GetValueAsScalar(data, 0, data.GetByteSize(),
scalar)) {
m_value = scalar;
m_value_type = eValueTypeScalar;
} else {
if ((uintptr_t)addr != (uintptr_t)m_data_buffer.GetBytes()) {
m_value.Clear();
m_value_type = eValueTypeScalar;
}
}
} else {
if ((uintptr_t)addr != (uintptr_t)m_data_buffer.GetBytes()) {
m_value.Clear();
m_value_type = eValueTypeScalar;
}
}
} break;
}
}
return m_value;
}
size_t
Section::MemoryMapSectionDataFromObjectFile(const ObjectFile* objfile, DataExtractor& section_data) const
{
if (objfile == NULL)
return 0;
const FileSpec& file = objfile->GetFileSpec();
if (file)
{
size_t section_file_size = GetFileSize();
if (section_file_size > 0)
{
off_t section_file_offset = GetFileOffset() + objfile->GetOffset();
DataBufferSP section_data_sp(file.MemoryMapFileContents(section_file_offset, section_file_size));
section_data.SetByteOrder(objfile->GetByteOrder());
section_data.SetAddressByteSize(objfile->GetAddressByteSize());
return section_data.SetData (section_data_sp);
}
}
return 0;
}
bool DWARFUnitIndex::parseImpl(DataExtractor IndexData) {
uint32_t Offset = 0;
if (!Header.parse(IndexData, &Offset))
return false;
if (!IndexData.isValidOffsetForDataOfSize(
Offset, Header.NumBuckets * (8 + 4) +
(2 * Header.NumUnits + 1) * 4 * Header.NumColumns))
return false;
Rows = llvm::make_unique<Entry[]>(Header.NumBuckets);
auto Contribs =
llvm::make_unique<Entry::SectionContribution *[]>(Header.NumUnits);
ColumnKinds = llvm::make_unique<DWARFSectionKind[]>(Header.NumColumns);
// Read Hash Table of Signatures
for (unsigned i = 0; i != Header.NumBuckets; ++i)
Rows[i].Signature = IndexData.getU64(&Offset);
// Read Parallel Table of Indexes
for (unsigned i = 0; i != Header.NumBuckets; ++i) {
auto Index = IndexData.getU32(&Offset);
if (!Index)
continue;
Rows[i].Index = this;
Rows[i].Contributions =
llvm::make_unique<Entry::SectionContribution[]>(Header.NumColumns);
Contribs[Index - 1] = Rows[i].Contributions.get();
}
// Read the Column Headers
for (unsigned i = 0; i != Header.NumColumns; ++i) {
ColumnKinds[i] = static_cast<DWARFSectionKind>(IndexData.getU32(&Offset));
if (ColumnKinds[i] == InfoColumnKind) {
if (InfoColumn != -1)
return false;
InfoColumn = i;
}
}
if (InfoColumn == -1)
return false;
// Read Table of Section Offsets
for (unsigned i = 0; i != Header.NumUnits; ++i) {
auto *Contrib = Contribs[i];
for (unsigned i = 0; i != Header.NumColumns; ++i)
Contrib[i].Offset = IndexData.getU32(&Offset);
}
// Read Table of Section Sizes
for (unsigned i = 0; i != Header.NumUnits; ++i) {
auto *Contrib = Contribs[i];
for (unsigned i = 0; i != Header.NumColumns; ++i)
Contrib[i].Length = IndexData.getU32(&Offset);
}
return true;
}
bool DWARFDebugInfoEntryMinimal::extractFast(const DWARFUnit *U,
uint32_t *OffsetPtr) {
Offset = *OffsetPtr;
DataExtractor DebugInfoData = U->getDebugInfoExtractor();
uint32_t UEndOffset = U->getNextUnitOffset();
if (Offset >= UEndOffset || !DebugInfoData.isValidOffset(Offset))
return false;
uint64_t AbbrCode = DebugInfoData.getULEB128(OffsetPtr);
if (0 == AbbrCode) {
// NULL debug tag entry.
AbbrevDecl = nullptr;
return true;
}
AbbrevDecl = U->getAbbreviations()->getAbbreviationDeclaration(AbbrCode);
if (nullptr == AbbrevDecl) {
// Restore the original offset.
*OffsetPtr = Offset;
return false;
}
ArrayRef<uint8_t> FixedFormSizes = DWARFFormValue::getFixedFormSizes(
U->getAddressByteSize(), U->getVersion());
assert(FixedFormSizes.size() > 0);
// Skip all data in the .debug_info for the attributes
for (const auto &AttrSpec : AbbrevDecl->attributes()) {
uint16_t Form = AttrSpec.Form;
uint8_t FixedFormSize =
(Form < FixedFormSizes.size()) ? FixedFormSizes[Form] : 0;
if (FixedFormSize)
*OffsetPtr += FixedFormSize;
else if (!DWARFFormValue::skipValue(Form, DebugInfoData, OffsetPtr, U)) {
// Restore the original offset.
*OffsetPtr = Offset;
return false;
}
}
return true;
}
static bool
FileAtPathContainsArchAndUUID
(
const FileSpec &file_spec,
const ArchSpec *arch,
const lldb_private::UUID *uuid
)
{
DataExtractor data;
off_t file_offset = 0;
DataBufferSP data_buffer_sp (file_spec.ReadFileContents (file_offset, 0x1000));
if (data_buffer_sp && data_buffer_sp->GetByteSize() > 0)
{
data.SetData(data_buffer_sp);
uint32_t data_offset = 0;
uint32_t magic = data.GetU32(&data_offset);
switch (magic)
{
// 32 bit mach-o file
case HeaderMagic32:
case HeaderMagic32Swapped:
case HeaderMagic64:
case HeaderMagic64Swapped:
return SkinnyMachOFileContainsArchAndUUID (file_spec, arch, uuid, file_offset, data, data_offset, magic);
// fat mach-o file
case UniversalMagic:
case UniversalMagicSwapped:
return UniversalMachOFileContainsArchAndUUID (file_spec, arch, uuid, file_offset, data, data_offset, magic);
default:
break;
}
}
return false;
}
bool Value::GetData(DataExtractor &data) {
switch (m_value_type) {
default:
break;
case eValueTypeScalar:
if (m_value.GetData(data))
return true;
break;
case eValueTypeLoadAddress:
case eValueTypeFileAddress:
case eValueTypeHostAddress:
if (m_data_buffer.GetByteSize()) {
data.SetData(m_data_buffer.GetBytes(), m_data_buffer.GetByteSize(),
data.GetByteOrder());
return true;
}
break;
}
return false;
}
DataExtractor ObjectFilePECOFF::ReadImageData(uint32_t offset, size_t size) {
if (m_file) {
// A bit of a hack, but we intend to write to this buffer, so we can't
// mmap it.
auto buffer_sp =
DataBufferLLVM::CreateSliceFromPath(m_file.GetPath(), size, offset, true);
return DataExtractor(buffer_sp, GetByteOrder(), GetAddressByteSize());
}
ProcessSP process_sp(m_process_wp.lock());
DataExtractor data;
if (process_sp) {
auto data_ap = llvm::make_unique<DataBufferHeap>(size, 0);
Status readmem_error;
size_t bytes_read =
process_sp->ReadMemory(m_image_base + offset, data_ap->GetBytes(),
data_ap->GetByteSize(), readmem_error);
if (bytes_read == size) {
DataBufferSP buffer_sp(data_ap.release());
data.SetData(buffer_sp, 0, buffer_sp->GetByteSize());
}
}
return data;
}
RegisterContextCorePOSIX_mips64::RegisterContextCorePOSIX_mips64(Thread &thread,
RegisterInfoInterface *register_info,
const DataExtractor &gpregset,
const DataExtractor &fpregset)
: RegisterContextPOSIX_mips64(thread, 0, register_info)
{
size_t i;
lldb::offset_t offset = 0;
for (i = 0; i < k_num_gpr_registers_mips64; i++)
{
m_reg[i] = gpregset.GetU64(&offset);
}
}
void
ThreadKDP::SetStopInfoFrom_KDP_EXCEPTION (const DataExtractor &exc_reply_packet)
{
lldb::offset_t offset = 0;
uint8_t reply_command = exc_reply_packet.GetU8(&offset);
if (reply_command == CommunicationKDP::KDP_EXCEPTION)
{
offset = 8;
const uint32_t count = exc_reply_packet.GetU32 (&offset);
if (count >= 1)
{
//const uint32_t cpu = exc_reply_packet.GetU32 (&offset);
offset += 4; // Skip the useless CPU field
const uint32_t exc_type = exc_reply_packet.GetU32 (&offset);
const uint32_t exc_code = exc_reply_packet.GetU32 (&offset);
const uint32_t exc_subcode = exc_reply_packet.GetU32 (&offset);
// We have to make a copy of the stop info because the thread list
// will iterate through the threads and clear all stop infos..
// Let the StopInfoMachException::CreateStopReasonWithMachException()
// function update the PC if needed as we might hit a software breakpoint
// and need to decrement the PC (i386 and x86_64 need this) and KDP
// doesn't do this for us.
const bool pc_already_adjusted = false;
const bool adjust_pc_if_needed = true;
m_cached_stop_info_sp = StopInfoMachException::CreateStopReasonWithMachException (*this,
exc_type,
2,
exc_code,
exc_subcode,
0,
pc_already_adjusted,
adjust_pc_if_needed);
}
}
}
