1 //===- DWARFDebugFrame.h - Parsing of .debug_frame ------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/DebugInfo/DWARF/DWARFDebugFrame.h"
11 #include "llvm/ADT/ArrayRef.h"
12 #include "llvm/ADT/DenseMap.h"
13 #include "llvm/ADT/Optional.h"
14 #include "llvm/ADT/STLExtras.h"
15 #include "llvm/ADT/SmallString.h"
16 #include "llvm/ADT/StringExtras.h"
17 #include "llvm/ADT/StringRef.h"
18 #include "llvm/BinaryFormat/Dwarf.h"
19 #include "llvm/Support/Casting.h"
20 #include "llvm/Support/Compiler.h"
21 #include "llvm/Support/DataExtractor.h"
22 #include "llvm/Support/ErrorHandling.h"
23 #include "llvm/Support/Format.h"
24 #include "llvm/Support/raw_ostream.h"
33 using namespace dwarf;
35 /// \brief Abstract frame entry defining the common interface concrete
36 /// entries implement.
37 class llvm::FrameEntry {
39 enum FrameKind {FK_CIE, FK_FDE};
41 FrameEntry(FrameKind K, uint64_t Offset, uint64_t Length)
42 : Kind(K), Offset(Offset), Length(Length) {}
44 virtual ~FrameEntry() = default;
46 FrameKind getKind() const { return Kind; }
47 virtual uint64_t getOffset() const { return Offset; }
49 /// \brief Parse and store a sequence of CFI instructions from Data,
50 /// starting at *Offset and ending at EndOffset. If everything
51 /// goes well, *Offset should be equal to EndOffset when this method
52 /// returns. Otherwise, an error occurred.
53 virtual void parseInstructions(DataExtractor Data, uint32_t *Offset,
56 /// \brief Dump the entry header to the given output stream.
57 virtual void dumpHeader(raw_ostream &OS) const = 0;
59 /// \brief Dump the entry's instructions to the given output stream.
60 virtual void dumpInstructions(raw_ostream &OS) const;
65 /// \brief Offset of this entry in the section.
68 /// \brief Entry length as specified in DWARF.
71 /// An entry may contain CFI instructions. An instruction consists of an
72 /// opcode and an optional sequence of operands.
73 using Operands = std::vector<uint64_t>;
75 Instruction(uint8_t Opcode)
83 std::vector<Instruction> Instructions;
85 /// Convenience methods to add a new instruction with the given opcode and
86 /// operands to the Instructions vector.
87 void addInstruction(uint8_t Opcode) {
88 Instructions.push_back(Instruction(Opcode));
91 void addInstruction(uint8_t Opcode, uint64_t Operand1) {
92 Instructions.push_back(Instruction(Opcode));
93 Instructions.back().Ops.push_back(Operand1);
96 void addInstruction(uint8_t Opcode, uint64_t Operand1, uint64_t Operand2) {
97 Instructions.push_back(Instruction(Opcode));
98 Instructions.back().Ops.push_back(Operand1);
99 Instructions.back().Ops.push_back(Operand2);
103 // See DWARF standard v3, section 7.23
104 const uint8_t DWARF_CFI_PRIMARY_OPCODE_MASK = 0xc0;
105 const uint8_t DWARF_CFI_PRIMARY_OPERAND_MASK = 0x3f;
107 void FrameEntry::parseInstructions(DataExtractor Data, uint32_t *Offset,
108 uint32_t EndOffset) {
109 while (*Offset < EndOffset) {
110 uint8_t Opcode = Data.getU8(Offset);
111 // Some instructions have a primary opcode encoded in the top bits.
112 uint8_t Primary = Opcode & DWARF_CFI_PRIMARY_OPCODE_MASK;
115 // If it's a primary opcode, the first operand is encoded in the bottom
116 // bits of the opcode itself.
117 uint64_t Op1 = Opcode & DWARF_CFI_PRIMARY_OPERAND_MASK;
119 default: llvm_unreachable("Impossible primary CFI opcode");
120 case DW_CFA_advance_loc:
122 addInstruction(Primary, Op1);
125 addInstruction(Primary, Op1, Data.getULEB128(Offset));
129 // Extended opcode - its value is Opcode itself.
131 default: llvm_unreachable("Invalid extended CFI opcode");
133 case DW_CFA_remember_state:
134 case DW_CFA_restore_state:
135 case DW_CFA_GNU_window_save:
137 addInstruction(Opcode);
141 addInstruction(Opcode, Data.getAddress(Offset));
143 case DW_CFA_advance_loc1:
144 // Operands: 1-byte delta
145 addInstruction(Opcode, Data.getU8(Offset));
147 case DW_CFA_advance_loc2:
148 // Operands: 2-byte delta
149 addInstruction(Opcode, Data.getU16(Offset));
151 case DW_CFA_advance_loc4:
152 // Operands: 4-byte delta
153 addInstruction(Opcode, Data.getU32(Offset));
155 case DW_CFA_restore_extended:
156 case DW_CFA_undefined:
157 case DW_CFA_same_value:
158 case DW_CFA_def_cfa_register:
159 case DW_CFA_def_cfa_offset:
161 addInstruction(Opcode, Data.getULEB128(Offset));
163 case DW_CFA_def_cfa_offset_sf:
165 addInstruction(Opcode, Data.getSLEB128(Offset));
167 case DW_CFA_offset_extended:
168 case DW_CFA_register:
170 case DW_CFA_val_offset: {
171 // Operands: ULEB128, ULEB128
172 // Note: We can not embed getULEB128 directly into function
173 // argument list. getULEB128 changes Offset and order of evaluation
174 // for arguments is unspecified.
175 auto op1 = Data.getULEB128(Offset);
176 auto op2 = Data.getULEB128(Offset);
177 addInstruction(Opcode, op1, op2);
180 case DW_CFA_offset_extended_sf:
181 case DW_CFA_def_cfa_sf:
182 case DW_CFA_val_offset_sf: {
183 // Operands: ULEB128, SLEB128
184 // Note: see comment for the previous case
185 auto op1 = Data.getULEB128(Offset);
186 auto op2 = (uint64_t)Data.getSLEB128(Offset);
187 addInstruction(Opcode, op1, op2);
190 case DW_CFA_def_cfa_expression:
191 case DW_CFA_expression:
192 case DW_CFA_val_expression:
193 // TODO: implement this
194 report_fatal_error("Values with expressions not implemented yet!");
202 /// \brief DWARF Common Information Entry (CIE)
203 class CIE : public FrameEntry {
205 // CIEs (and FDEs) are simply container classes, so the only sensible way to
206 // create them is by providing the full parsed contents in the constructor.
207 CIE(uint64_t Offset, uint64_t Length, uint8_t Version,
208 SmallString<8> Augmentation, uint8_t AddressSize,
209 uint8_t SegmentDescriptorSize, uint64_t CodeAlignmentFactor,
210 int64_t DataAlignmentFactor, uint64_t ReturnAddressRegister,
211 SmallString<8> AugmentationData, uint32_t FDEPointerEncoding,
212 uint32_t LSDAPointerEncoding)
213 : FrameEntry(FK_CIE, Offset, Length), Version(Version),
214 Augmentation(std::move(Augmentation)), AddressSize(AddressSize),
215 SegmentDescriptorSize(SegmentDescriptorSize),
216 CodeAlignmentFactor(CodeAlignmentFactor),
217 DataAlignmentFactor(DataAlignmentFactor),
218 ReturnAddressRegister(ReturnAddressRegister),
219 AugmentationData(std::move(AugmentationData)),
220 FDEPointerEncoding(FDEPointerEncoding),
221 LSDAPointerEncoding(LSDAPointerEncoding) {}
223 ~CIE() override = default;
225 StringRef getAugmentationString() const { return Augmentation; }
226 uint64_t getCodeAlignmentFactor() const { return CodeAlignmentFactor; }
227 int64_t getDataAlignmentFactor() const { return DataAlignmentFactor; }
229 uint32_t getFDEPointerEncoding() const {
230 return FDEPointerEncoding;
233 uint32_t getLSDAPointerEncoding() const {
234 return LSDAPointerEncoding;
237 void dumpHeader(raw_ostream &OS) const override {
238 OS << format("%08x %08x %08x CIE",
239 (uint32_t)Offset, (uint32_t)Length, DW_CIE_ID)
241 OS << format(" Version: %d\n", Version);
242 OS << " Augmentation: \"" << Augmentation << "\"\n";
244 OS << format(" Address size: %u\n",
245 (uint32_t)AddressSize);
246 OS << format(" Segment desc size: %u\n",
247 (uint32_t)SegmentDescriptorSize);
249 OS << format(" Code alignment factor: %u\n",
250 (uint32_t)CodeAlignmentFactor);
251 OS << format(" Data alignment factor: %d\n",
252 (int32_t)DataAlignmentFactor);
253 OS << format(" Return address column: %d\n",
254 (int32_t)ReturnAddressRegister);
255 if (!AugmentationData.empty()) {
256 OS << " Augmentation data: ";
257 for (uint8_t Byte : AugmentationData)
258 OS << ' ' << hexdigit(Byte >> 4) << hexdigit(Byte & 0xf);
264 static bool classof(const FrameEntry *FE) {
265 return FE->getKind() == FK_CIE;
269 /// The following fields are defined in section 6.4.1 of the DWARF standard v4
271 SmallString<8> Augmentation;
273 uint8_t SegmentDescriptorSize;
274 uint64_t CodeAlignmentFactor;
275 int64_t DataAlignmentFactor;
276 uint64_t ReturnAddressRegister;
278 // The following are used when the CIE represents an EH frame entry.
279 SmallString<8> AugmentationData;
280 uint32_t FDEPointerEncoding;
281 uint32_t LSDAPointerEncoding;
284 /// \brief DWARF Frame Description Entry (FDE)
285 class FDE : public FrameEntry {
287 // Each FDE has a CIE it's "linked to". Our FDE contains is constructed with
288 // an offset to the CIE (provided by parsing the FDE header). The CIE itself
289 // is obtained lazily once it's actually required.
290 FDE(uint64_t Offset, uint64_t Length, int64_t LinkedCIEOffset,
291 uint64_t InitialLocation, uint64_t AddressRange,
293 : FrameEntry(FK_FDE, Offset, Length), LinkedCIEOffset(LinkedCIEOffset),
294 InitialLocation(InitialLocation), AddressRange(AddressRange),
297 ~FDE() override = default;
299 CIE *getLinkedCIE() const { return LinkedCIE; }
301 void dumpHeader(raw_ostream &OS) const override {
302 OS << format("%08x %08x %08x FDE ",
303 (uint32_t)Offset, (uint32_t)Length, (int32_t)LinkedCIEOffset);
304 OS << format("cie=%08x pc=%08x...%08x\n",
305 (int32_t)LinkedCIEOffset,
306 (uint32_t)InitialLocation,
307 (uint32_t)InitialLocation + (uint32_t)AddressRange);
310 static bool classof(const FrameEntry *FE) {
311 return FE->getKind() == FK_FDE;
315 /// The following fields are defined in section 6.4.1 of the DWARF standard v3
316 uint64_t LinkedCIEOffset;
317 uint64_t InitialLocation;
318 uint64_t AddressRange;
322 /// \brief Types of operands to CF instructions.
328 OT_FactoredCodeOffset,
329 OT_SignedFactDataOffset,
330 OT_UnsignedFactDataOffset,
335 } // end anonymous namespace
337 /// \brief Initialize the array describing the types of operands.
338 static ArrayRef<OperandType[2]> getOperandTypes() {
339 static OperandType OpTypes[DW_CFA_restore+1][2];
341 #define DECLARE_OP2(OP, OPTYPE0, OPTYPE1) \
343 OpTypes[OP][0] = OPTYPE0; \
344 OpTypes[OP][1] = OPTYPE1; \
346 #define DECLARE_OP1(OP, OPTYPE0) DECLARE_OP2(OP, OPTYPE0, OT_None)
347 #define DECLARE_OP0(OP) DECLARE_OP1(OP, OT_None)
349 DECLARE_OP1(DW_CFA_set_loc, OT_Address);
350 DECLARE_OP1(DW_CFA_advance_loc, OT_FactoredCodeOffset);
351 DECLARE_OP1(DW_CFA_advance_loc1, OT_FactoredCodeOffset);
352 DECLARE_OP1(DW_CFA_advance_loc2, OT_FactoredCodeOffset);
353 DECLARE_OP1(DW_CFA_advance_loc4, OT_FactoredCodeOffset);
354 DECLARE_OP1(DW_CFA_MIPS_advance_loc8, OT_FactoredCodeOffset);
355 DECLARE_OP2(DW_CFA_def_cfa, OT_Register, OT_Offset);
356 DECLARE_OP2(DW_CFA_def_cfa_sf, OT_Register, OT_SignedFactDataOffset);
357 DECLARE_OP1(DW_CFA_def_cfa_register, OT_Register);
358 DECLARE_OP1(DW_CFA_def_cfa_offset, OT_Offset);
359 DECLARE_OP1(DW_CFA_def_cfa_offset_sf, OT_SignedFactDataOffset);
360 DECLARE_OP1(DW_CFA_def_cfa_expression, OT_Expression);
361 DECLARE_OP1(DW_CFA_undefined, OT_Register);
362 DECLARE_OP1(DW_CFA_same_value, OT_Register);
363 DECLARE_OP2(DW_CFA_offset, OT_Register, OT_UnsignedFactDataOffset);
364 DECLARE_OP2(DW_CFA_offset_extended, OT_Register, OT_UnsignedFactDataOffset);
365 DECLARE_OP2(DW_CFA_offset_extended_sf, OT_Register, OT_SignedFactDataOffset);
366 DECLARE_OP2(DW_CFA_val_offset, OT_Register, OT_UnsignedFactDataOffset);
367 DECLARE_OP2(DW_CFA_val_offset_sf, OT_Register, OT_SignedFactDataOffset);
368 DECLARE_OP2(DW_CFA_register, OT_Register, OT_Register);
369 DECLARE_OP2(DW_CFA_expression, OT_Register, OT_Expression);
370 DECLARE_OP2(DW_CFA_val_expression, OT_Register, OT_Expression);
371 DECLARE_OP1(DW_CFA_restore, OT_Register);
372 DECLARE_OP1(DW_CFA_restore_extended, OT_Register);
373 DECLARE_OP0(DW_CFA_remember_state);
374 DECLARE_OP0(DW_CFA_restore_state);
375 DECLARE_OP0(DW_CFA_GNU_window_save);
376 DECLARE_OP1(DW_CFA_GNU_args_size, OT_Offset);
377 DECLARE_OP0(DW_CFA_nop);
383 return ArrayRef<OperandType[2]>(&OpTypes[0], DW_CFA_restore+1);
386 static ArrayRef<OperandType[2]> OpTypes = getOperandTypes();
388 /// \brief Print \p Opcode's operand number \p OperandIdx which has
389 /// value \p Operand.
390 static void printOperand(raw_ostream &OS, uint8_t Opcode, unsigned OperandIdx,
391 uint64_t Operand, uint64_t CodeAlignmentFactor,
392 int64_t DataAlignmentFactor) {
393 assert(OperandIdx < 2);
394 OperandType Type = OpTypes[Opcode][OperandIdx];
398 OS << " Unsupported " << (OperandIdx ? "second" : "first") << " operand to";
399 auto OpcodeName = CallFrameString(Opcode);
400 if (!OpcodeName.empty())
401 OS << " " << OpcodeName;
403 OS << format(" Opcode %x", Opcode);
409 OS << format(" %" PRIx64, Operand);
412 // The offsets are all encoded in a unsigned form, but in practice
413 // consumers use them signed. It's most certainly legacy due to
414 // the lack of signed variants in the first Dwarf standards.
415 OS << format(" %+" PRId64, int64_t(Operand));
417 case OT_FactoredCodeOffset: // Always Unsigned
418 if (CodeAlignmentFactor)
419 OS << format(" %" PRId64, Operand * CodeAlignmentFactor);
421 OS << format(" %" PRId64 "*code_alignment_factor" , Operand);
423 case OT_SignedFactDataOffset:
424 if (DataAlignmentFactor)
425 OS << format(" %" PRId64, int64_t(Operand) * DataAlignmentFactor);
427 OS << format(" %" PRId64 "*data_alignment_factor" , int64_t(Operand));
429 case OT_UnsignedFactDataOffset:
430 if (DataAlignmentFactor)
431 OS << format(" %" PRId64, Operand * DataAlignmentFactor);
433 OS << format(" %" PRId64 "*data_alignment_factor" , Operand);
436 OS << format(" reg%" PRId64, Operand);
444 void FrameEntry::dumpInstructions(raw_ostream &OS) const {
445 uint64_t CodeAlignmentFactor = 0;
446 int64_t DataAlignmentFactor = 0;
447 const CIE *Cie = dyn_cast<CIE>(this);
450 Cie = cast<FDE>(this)->getLinkedCIE();
452 CodeAlignmentFactor = Cie->getCodeAlignmentFactor();
453 DataAlignmentFactor = Cie->getDataAlignmentFactor();
456 for (const auto &Instr : Instructions) {
457 uint8_t Opcode = Instr.Opcode;
458 if (Opcode & DWARF_CFI_PRIMARY_OPCODE_MASK)
459 Opcode &= DWARF_CFI_PRIMARY_OPCODE_MASK;
460 OS << " " << CallFrameString(Opcode) << ":";
461 for (unsigned i = 0; i < Instr.Ops.size(); ++i)
462 printOperand(OS, Opcode, i, Instr.Ops[i], CodeAlignmentFactor,
463 DataAlignmentFactor);
468 DWARFDebugFrame::DWARFDebugFrame(bool IsEH) : IsEH(IsEH) {}
470 DWARFDebugFrame::~DWARFDebugFrame() = default;
472 static void LLVM_ATTRIBUTE_UNUSED dumpDataAux(DataExtractor Data,
473 uint32_t Offset, int Length) {
475 for (int i = 0; i < Length; ++i) {
476 uint8_t c = Data.getU8(&Offset);
477 errs().write_hex(c); errs() << " ";
482 static unsigned getSizeForEncoding(const DataExtractor &Data,
483 unsigned symbolEncoding) {
484 unsigned format = symbolEncoding & 0x0f;
486 default: llvm_unreachable("Unknown Encoding");
487 case DW_EH_PE_absptr:
488 case DW_EH_PE_signed:
489 return Data.getAddressSize();
490 case DW_EH_PE_udata2:
491 case DW_EH_PE_sdata2:
493 case DW_EH_PE_udata4:
494 case DW_EH_PE_sdata4:
496 case DW_EH_PE_udata8:
497 case DW_EH_PE_sdata8:
502 static uint64_t readPointer(const DataExtractor &Data, uint32_t &Offset,
504 switch (getSizeForEncoding(Data, Encoding)) {
506 return Data.getU16(&Offset);
508 return Data.getU32(&Offset);
510 return Data.getU64(&Offset);
512 llvm_unreachable("Illegal data size");
516 // This is a workaround for old compilers which do not allow
517 // noreturn attribute usage in lambdas. Once the support for those
518 // compilers are phased out, we can remove this and return back to
519 // a ReportError lambda: [StartOffset](const char *ErrorMsg).
520 static void LLVM_ATTRIBUTE_NORETURN ReportError(uint32_t StartOffset,
521 const char *ErrorMsg) {
523 raw_string_ostream OS(Str);
524 OS << format(ErrorMsg, StartOffset);
526 report_fatal_error(Str);
529 void DWARFDebugFrame::parse(DataExtractor Data) {
531 DenseMap<uint32_t, CIE *> CIEs;
533 while (Data.isValidOffset(Offset)) {
534 uint32_t StartOffset = Offset;
536 bool IsDWARF64 = false;
537 uint64_t Length = Data.getU32(&Offset);
540 if (Length == UINT32_MAX) {
541 // DWARF-64 is distinguished by the first 32 bits of the initial length
542 // field being 0xffffffff. Then, the next 64 bits are the actual entry
545 Length = Data.getU64(&Offset);
548 // At this point, Offset points to the next field after Length.
549 // Length is the structure size excluding itself. Compute an offset one
550 // past the end of the structure (needed to know how many instructions to
552 // TODO: For honest DWARF64 support, DataExtractor will have to treat
553 // offset_ptr as uint64_t*
554 uint32_t StartStructureOffset = Offset;
555 uint32_t EndStructureOffset = Offset + static_cast<uint32_t>(Length);
557 // The Id field's size depends on the DWARF format
558 Id = Data.getUnsigned(&Offset, (IsDWARF64 && !IsEH) ? 8 : 4);
559 bool IsCIE = ((IsDWARF64 && Id == DW64_CIE_ID) ||
564 uint8_t Version = Data.getU8(&Offset);
565 const char *Augmentation = Data.getCStr(&Offset);
566 StringRef AugmentationString(Augmentation ? Augmentation : "");
567 uint8_t AddressSize = Version < 4 ? Data.getAddressSize() :
569 Data.setAddressSize(AddressSize);
570 uint8_t SegmentDescriptorSize = Version < 4 ? 0 : Data.getU8(&Offset);
571 uint64_t CodeAlignmentFactor = Data.getULEB128(&Offset);
572 int64_t DataAlignmentFactor = Data.getSLEB128(&Offset);
573 uint64_t ReturnAddressRegister = Data.getULEB128(&Offset);
575 // Parse the augmentation data for EH CIEs
576 StringRef AugmentationData("");
577 uint32_t FDEPointerEncoding = DW_EH_PE_omit;
578 uint32_t LSDAPointerEncoding = DW_EH_PE_omit;
580 Optional<uint32_t> PersonalityEncoding;
581 Optional<uint64_t> Personality;
583 Optional<uint64_t> AugmentationLength;
584 uint32_t StartAugmentationOffset;
585 uint32_t EndAugmentationOffset;
587 // Walk the augmentation string to get all the augmentation data.
588 for (unsigned i = 0, e = AugmentationString.size(); i != e; ++i) {
589 switch (AugmentationString[i]) {
591 ReportError(StartOffset,
592 "Unknown augmentation character in entry at %lx");
594 LSDAPointerEncoding = Data.getU8(&Offset);
598 ReportError(StartOffset,
599 "Duplicate personality in entry at %lx");
600 PersonalityEncoding = Data.getU8(&Offset);
601 Personality = readPointer(Data, Offset, *PersonalityEncoding);
605 FDEPointerEncoding = Data.getU8(&Offset);
609 ReportError(StartOffset,
610 "'z' must be the first character at %lx");
611 // Parse the augmentation length first. We only parse it if
612 // the string contains a 'z'.
613 AugmentationLength = Data.getULEB128(&Offset);
614 StartAugmentationOffset = Offset;
615 EndAugmentationOffset = Offset +
616 static_cast<uint32_t>(*AugmentationLength);
620 if (AugmentationLength.hasValue()) {
621 if (Offset != EndAugmentationOffset)
622 ReportError(StartOffset, "Parsing augmentation data at %lx failed");
624 AugmentationData = Data.getData().slice(StartAugmentationOffset,
625 EndAugmentationOffset);
629 auto Cie = llvm::make_unique<CIE>(StartOffset, Length, Version,
630 AugmentationString, AddressSize,
631 SegmentDescriptorSize,
634 ReturnAddressRegister,
635 AugmentationData, FDEPointerEncoding,
636 LSDAPointerEncoding);
637 CIEs[StartOffset] = Cie.get();
638 Entries.emplace_back(std::move(Cie));
641 uint64_t CIEPointer = Id;
642 uint64_t InitialLocation = 0;
643 uint64_t AddressRange = 0;
644 CIE *Cie = CIEs[IsEH ? (StartStructureOffset - CIEPointer) : CIEPointer];
647 // The address size is encoded in the CIE we reference.
649 ReportError(StartOffset,
650 "Parsing FDE data at %lx failed due to missing CIE");
652 InitialLocation = readPointer(Data, Offset,
653 Cie->getFDEPointerEncoding());
654 AddressRange = readPointer(Data, Offset,
655 Cie->getFDEPointerEncoding());
657 StringRef AugmentationString = Cie->getAugmentationString();
658 if (!AugmentationString.empty()) {
659 // Parse the augmentation length and data for this FDE.
660 uint64_t AugmentationLength = Data.getULEB128(&Offset);
662 uint32_t EndAugmentationOffset =
663 Offset + static_cast<uint32_t>(AugmentationLength);
665 // Decode the LSDA if the CIE augmentation string said we should.
666 if (Cie->getLSDAPointerEncoding() != DW_EH_PE_omit)
667 readPointer(Data, Offset, Cie->getLSDAPointerEncoding());
669 if (Offset != EndAugmentationOffset)
670 ReportError(StartOffset, "Parsing augmentation data at %lx failed");
673 InitialLocation = Data.getAddress(&Offset);
674 AddressRange = Data.getAddress(&Offset);
677 Entries.emplace_back(new FDE(StartOffset, Length, CIEPointer,
678 InitialLocation, AddressRange,
682 Entries.back()->parseInstructions(Data, &Offset, EndStructureOffset);
684 if (Offset != EndStructureOffset)
685 ReportError(StartOffset, "Parsing entry instructions at %lx failed");
689 void DWARFDebugFrame::dump(raw_ostream &OS) const {
691 for (const auto &Entry : Entries) {
692 Entry->dumpHeader(OS);
693 Entry->dumpInstructions(OS);