#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/LEB128.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/SourceMgr.h"
-#include "llvm/ADT/FoldingSet.h"
+#include "llvm/ADT/Hashing.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Config/config.h"
// First special line opcode - leave room for the standard opcodes.
// Note: If you want to change this, you'll have to update the
-// "standard_opcode_lengths" table that is emitted in DwarfFileTable::Emit().
+// "standard_opcode_lengths" table that is emitted in DwarfFileTable::Emit().
#define DWARF2_LINE_OPCODE_BASE 13
// Minimum line offset in a special line info. opcode. This value
//
// This helper routine returns an expression of End - Start + IntVal .
-//
+//
static inline const MCExpr *MakeStartMinusEndExpr(const MCStreamer &MCOS,
const MCSymbol &Start,
const MCSymbol &End,
// Set the value of the symbol, as we are at the end of the section.
MCOS->EmitLabel(SectionEnd);
- // Switch back the the dwarf line section.
+ // Switch back the dwarf line section.
MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfLineSection());
const MCAsmInfo &asmInfo = MCOS->getContext().getAsmInfo();
//
// This emits the Dwarf file and the line tables.
//
-void MCDwarfFileTable::Emit(MCStreamer *MCOS) {
+const MCSymbol *MCDwarfFileTable::Emit(MCStreamer *MCOS) {
MCContext &context = MCOS->getContext();
// Switch to the section where the table will be emitted into.
MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfLineSection());
if (MCOS->getContext().getAsmInfo().getLinkerRequiresNonEmptyDwarfLines()
&& MCLineSectionOrder.begin() == MCLineSectionOrder.end()) {
// The darwin9 linker has a bug (see PR8715). For for 32-bit architectures
- // it requires:
+ // it requires:
// total_length >= prologue_length + 10
// We are 4 bytes short, since we have total_length = 51 and
// prologue_length = 45
// This is the end of the section, so set the value of the symbol at the end
// of this section (that was used in a previous expression).
MCOS->EmitLabel(LineEndSym);
+
+ return LineStartSym;
}
/// Utility function to write the encoding to an object writer.
AddrDelta = ScaleAddrDelta(AddrDelta);
// A LineDelta of INT64_MAX is a signal that this is actually a
- // DW_LNE_end_sequence. We cannot use special opcodes here, since we want the
+ // DW_LNE_end_sequence. We cannot use special opcodes here, since we want the
// end_sequence to emit the matrix entry.
if (LineDelta == INT64_MAX) {
if (AddrDelta == MAX_SPECIAL_ADDR_DELTA)
OS << char(dwarf::DW_LNS_const_add_pc);
else {
OS << char(dwarf::DW_LNS_advance_pc);
- MCObjectWriter::EncodeULEB128(AddrDelta, OS);
+ encodeULEB128(AddrDelta, OS);
}
OS << char(dwarf::DW_LNS_extended_op);
OS << char(1);
// it with DW_LNS_advance_line.
if (Temp >= DWARF2_LINE_RANGE) {
OS << char(dwarf::DW_LNS_advance_line);
- MCObjectWriter::EncodeSLEB128(LineDelta, OS);
+ encodeSLEB128(LineDelta, OS);
LineDelta = 0;
Temp = 0 - DWARF2_LINE_BASE;
// Otherwise use DW_LNS_advance_pc.
OS << char(dwarf::DW_LNS_advance_pc);
- MCObjectWriter::EncodeULEB128(AddrDelta, OS);
+ encodeULEB128(AddrDelta, OS);
if (NeedCopy)
OS << char(dwarf::DW_LNS_copy);
OS << '"' << getName() << '"';
}
+#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
void MCDwarfFile::dump() const {
print(dbgs());
}
+#endif
// Utility function to write a tuple for .debug_abbrev.
static void EmitAbbrev(MCStreamer *MCOS, uint64_t Name, uint64_t Form) {
// When generating dwarf for assembly source files this emits the data for
// .debug_info section which contains three parts. The header, the compile_unit
// DIE and a list of label DIEs.
-static void EmitGenDwarfInfo(MCStreamer *MCOS) {
+static void EmitGenDwarfInfo(MCStreamer *MCOS,
+ const MCSymbol *AbbrevSectionSymbol,
+ const MCSymbol *LineSectionSymbol) {
MCContext &context = MCOS->getContext();
- MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfInfoSection());
+ MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfInfoSection());
// Create a symbol at the start and end of this section used in here for the
// expression to calculate the length in the header.
// The 4 byte offset to the debug abbrevs from the start of the .debug_abbrev,
// it is at the start of that section so this is zero.
- MCOS->EmitIntValue(0, 4);
+ if (AbbrevSectionSymbol) {
+ MCOS->EmitSymbolValue(AbbrevSectionSymbol, 4);
+ } else {
+ MCOS->EmitIntValue(0, 4);
+ }
const MCAsmInfo &asmInfo = context.getAsmInfo();
int AddrSize = asmInfo.getPointerSize();
// DW_AT_stmt_list, a 4 byte offset from the start of the .debug_line section,
// which is at the start of that section so this is zero.
- MCOS->EmitIntValue(0, 4);
+ if (LineSectionSymbol) {
+ MCOS->EmitSymbolValue(LineSectionSymbol, 4);
+ } else {
+ MCOS->EmitIntValue(0, 4);
+ }
// AT_low_pc, the first address of the default .text section.
const MCExpr *Start = MCSymbolRefExpr::Create(
// Third part: the list of label DIEs.
- // Loop on saved info for dwarf subprograms and create the DIEs for them.
- const std::vector<const MCGenDwarfSubprogramEntry *> &Entries =
- MCOS->getContext().getMCGenDwarfSubprogramEntries();
- for (std::vector<const MCGenDwarfSubprogramEntry *>::const_iterator it =
+ // Loop on saved info for dwarf labels and create the DIEs for them.
+ const std::vector<const MCGenDwarfLabelEntry *> &Entries =
+ MCOS->getContext().getMCGenDwarfLabelEntries();
+ for (std::vector<const MCGenDwarfLabelEntry *>::const_iterator it =
Entries.begin(), ie = Entries.end(); it != ie;
++it) {
- const MCGenDwarfSubprogramEntry *Entry = *it;
+ const MCGenDwarfLabelEntry *Entry = *it;
// The DW_TAG_label DIE abbrev (2).
MCOS->EmitULEB128IntValue(2);
// Add the NULL DIE terminating the DW_TAG_unspecified_parameters DIE's.
MCOS->EmitIntValue(0, 1);
}
- // Deallocate the MCGenDwarfSubprogramEntry classes that saved away the info
- // for the dwarf subprograms.
- for (std::vector<const MCGenDwarfSubprogramEntry *>::const_iterator it =
+ // Deallocate the MCGenDwarfLabelEntry classes that saved away the info
+ // for the dwarf labels.
+ for (std::vector<const MCGenDwarfLabelEntry *>::const_iterator it =
Entries.begin(), ie = Entries.end(); it != ie;
++it) {
- const MCGenDwarfSubprogramEntry *Entry = *it;
+ const MCGenDwarfLabelEntry *Entry = *it;
delete Entry;
}
// When generating dwarf for assembly source files this emits the Dwarf
// sections.
//
-void MCGenDwarfInfo::Emit(MCStreamer *MCOS) {
+void MCGenDwarfInfo::Emit(MCStreamer *MCOS, const MCSymbol *LineSectionSymbol) {
// Create the dwarf sections in this order (.debug_line already created).
MCContext &context = MCOS->getContext();
+ const MCAsmInfo &AsmInfo = context.getAsmInfo();
MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfInfoSection());
MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfAbbrevSection());
+ MCSymbol *AbbrevSectionSymbol;
+ if (AsmInfo.doesDwarfUseRelocationsAcrossSections()) {
+ AbbrevSectionSymbol = context.CreateTempSymbol();
+ MCOS->EmitLabel(AbbrevSectionSymbol);
+ } else {
+ AbbrevSectionSymbol = NULL;
+ LineSectionSymbol = NULL;
+ }
MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfARangesSection());
// If there are no line table entries then do not emit any section contents.
EmitGenDwarfAbbrev(MCOS);
// Output the data for .debug_info section.
- EmitGenDwarfInfo(MCOS);
+ EmitGenDwarfInfo(MCOS, AbbrevSectionSymbol, LineSectionSymbol);
}
//
// When generating dwarf for assembly source files this is called when symbol
// for a label is created. If this symbol is not a temporary and is in the
// section that dwarf is being generated for, save the needed info to create
-// a dwarf subprogram.
+// a dwarf label.
//
-void MCGenDwarfSubprogramEntry::Make(MCSymbol *Symbol, MCStreamer *MCOS,
+void MCGenDwarfLabelEntry::Make(MCSymbol *Symbol, MCStreamer *MCOS,
SourceMgr &SrcMgr, SMLoc &Loc) {
- // We won't create dwarf subprogram's for temporary symbols or symbols not in
+ // We won't create dwarf labels for temporary symbols or symbols not in
// the default text.
if (Symbol->isTemporary())
return;
if (context.getGenDwarfSection() != MCOS->getCurrentSection())
return;
- // The dwarf subprogram's name does not have the symbol name's leading
+ // The dwarf label's name does not have the symbol name's leading
// underbar if any.
StringRef Name = Symbol->getName();
if (Name.startswith("_"))
Name = Name.substr(1, Name.size()-1);
- // Get the dwarf file number to be used for the dwarf subprogram.
+ // Get the dwarf file number to be used for the dwarf label.
unsigned FileNumber = context.getGenDwarfFileNumber();
// Finding the line number is the expensive part which is why we just don't
- // pass it in as for some symbols we won't create a dwarf subprogram.
+ // pass it in as for some symbols we won't create a dwarf label.
int CurBuffer = SrcMgr.FindBufferContainingLoc(Loc);
unsigned LineNumber = SrcMgr.FindLineNumber(Loc, CurBuffer);
MCOS->EmitLabel(Label);
// Create and entry for the info and add it to the other entries.
- MCGenDwarfSubprogramEntry *Entry =
- new MCGenDwarfSubprogramEntry(Name, FileNumber, LineNumber, Label);
- MCOS->getContext().addMCGenDwarfSubprogramEntry(Entry);
+ MCGenDwarfLabelEntry *Entry =
+ new MCGenDwarfLabelEntry(Name, FileNumber, LineNumber, Label);
+ MCOS->getContext().addMCGenDwarfLabelEntry(Entry);
}
static int getDataAlignmentFactor(MCStreamer &streamer) {
MCContext &context = streamer.getContext();
unsigned format = symbolEncoding & 0x0f;
switch (format) {
- default:
- assert(0 && "Unknown Encoding");
+ default: llvm_unreachable("Unknown Encoding");
case dwarf::DW_EH_PE_absptr:
case dwarf::DW_EH_PE_signed:
return context.getAsmInfo().getPointerSize();
const MCSymbol *personality,
unsigned personalityEncoding,
const MCSymbol *lsda,
+ bool IsSignalFrame,
unsigned lsdaEncoding);
MCSymbol *EmitFDE(MCStreamer &streamer,
const MCSymbol &cieStart,
static void EmitEncodingByte(MCStreamer &Streamer, unsigned Encoding,
StringRef Prefix) {
if (Streamer.isVerboseAsm()) {
- const char *EncStr = 0;
+ const char *EncStr;
switch (Encoding) {
- default: EncStr = "<unknown encoding>";
- case dwarf::DW_EH_PE_absptr: EncStr = "absptr";
- case dwarf::DW_EH_PE_omit: EncStr = "omit";
- case dwarf::DW_EH_PE_pcrel: EncStr = "pcrel";
- case dwarf::DW_EH_PE_udata4: EncStr = "udata4";
- case dwarf::DW_EH_PE_udata8: EncStr = "udata8";
- case dwarf::DW_EH_PE_sdata4: EncStr = "sdata4";
- case dwarf::DW_EH_PE_sdata8: EncStr = "sdata8";
- case dwarf::DW_EH_PE_pcrel |dwarf::DW_EH_PE_udata4: EncStr = "pcrel udata4";
- case dwarf::DW_EH_PE_pcrel |dwarf::DW_EH_PE_sdata4: EncStr = "pcrel sdata4";
- case dwarf::DW_EH_PE_pcrel |dwarf::DW_EH_PE_udata8: EncStr = "pcrel udata8";
- case dwarf::DW_EH_PE_pcrel |dwarf::DW_EH_PE_sdata8: EncStr = "pcrel sdata8";
+ default: EncStr = "<unknown encoding>"; break;
+ case dwarf::DW_EH_PE_absptr: EncStr = "absptr"; break;
+ case dwarf::DW_EH_PE_omit: EncStr = "omit"; break;
+ case dwarf::DW_EH_PE_pcrel: EncStr = "pcrel"; break;
+ case dwarf::DW_EH_PE_udata4: EncStr = "udata4"; break;
+ case dwarf::DW_EH_PE_udata8: EncStr = "udata8"; break;
+ case dwarf::DW_EH_PE_sdata4: EncStr = "sdata4"; break;
+ case dwarf::DW_EH_PE_sdata8: EncStr = "sdata8"; break;
+ case dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata4:
+ EncStr = "pcrel udata4";
+ break;
+ case dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4:
+ EncStr = "pcrel sdata4";
+ break;
+ case dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata8:
+ EncStr = "pcrel udata8";
+ break;
+ case dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata8:
+ EncStr = "screl sdata8";
+ break;
case dwarf::DW_EH_PE_indirect |dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_udata4:
EncStr = "indirect pcrel udata4";
+ break;
case dwarf::DW_EH_PE_indirect |dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_sdata4:
EncStr = "indirect pcrel sdata4";
+ break;
case dwarf::DW_EH_PE_indirect |dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_udata8:
EncStr = "indirect pcrel udata8";
+ break;
case dwarf::DW_EH_PE_indirect |dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_sdata8:
EncStr = "indirect pcrel sdata8";
+ break;
}
Streamer.AddComment(Twine(Prefix) + " = " + EncStr);
const MCSymbol *personality,
unsigned personalityEncoding,
const MCSymbol *lsda,
+ bool IsSignalFrame,
unsigned lsdaEncoding) {
MCContext &context = streamer.getContext();
const MCRegisterInfo &MRI = context.getRegisterInfo();
if (lsda)
Augmentation += "L";
Augmentation += "R";
+ if (IsSignalFrame)
+ Augmentation += "S";
streamer.EmitBytes(Augmentation.str(), 0);
}
streamer.EmitIntValue(0, 1);
0);
if (verboseAsm) streamer.AddComment("FDE CIE Offset");
streamer.EmitAbsValue(offset, 4);
- } else if (!asmInfo.doesDwarfRequireRelocationForSectionOffset()) {
+ } else if (!asmInfo.doesDwarfUseRelocationsAcrossSections()) {
const MCExpr *offset = MakeStartMinusEndExpr(streamer, *SectionStart,
cieStart, 0);
streamer.EmitAbsValue(offset, 4);
streamer.EmitSymbolValue(&cieStart, 4);
}
- unsigned fdeEncoding = MOFI->getFDEEncoding(UsingCFI);
- unsigned size = getSizeForEncoding(streamer, fdeEncoding);
-
// PC Begin
- unsigned PCBeginEncoding = IsEH ? fdeEncoding :
- (unsigned)dwarf::DW_EH_PE_absptr;
- unsigned PCBeginSize = getSizeForEncoding(streamer, PCBeginEncoding);
- EmitSymbol(streamer, *frame.Begin, PCBeginEncoding, "FDE initial location");
+ unsigned PCEncoding = IsEH ? MOFI->getFDEEncoding(UsingCFI)
+ : (unsigned)dwarf::DW_EH_PE_absptr;
+ unsigned PCSize = getSizeForEncoding(streamer, PCEncoding);
+ EmitSymbol(streamer, *frame.Begin, PCEncoding, "FDE initial location");
// PC Range
const MCExpr *Range = MakeStartMinusEndExpr(streamer, *frame.Begin,
*frame.End, 0);
if (verboseAsm) streamer.AddComment("FDE address range");
- streamer.EmitAbsValue(Range, size);
+ streamer.EmitAbsValue(Range, PCSize);
if (IsEH) {
// Augmentation Data Length
EmitCFIInstructions(streamer, frame.Instructions, frame.Begin);
// Padding
- streamer.EmitValueToAlignment(PCBeginSize);
+ streamer.EmitValueToAlignment(PCSize);
return fdeEnd;
}
namespace {
struct CIEKey {
- static const CIEKey getEmptyKey() { return CIEKey(0, 0, -1); }
- static const CIEKey getTombstoneKey() { return CIEKey(0, -1, 0); }
+ static const CIEKey getEmptyKey() { return CIEKey(0, 0, -1, false); }
+ static const CIEKey getTombstoneKey() { return CIEKey(0, -1, 0, false); }
CIEKey(const MCSymbol* Personality_, unsigned PersonalityEncoding_,
- unsigned LsdaEncoding_) : Personality(Personality_),
- PersonalityEncoding(PersonalityEncoding_),
- LsdaEncoding(LsdaEncoding_) {
+ unsigned LsdaEncoding_, bool IsSignalFrame_) :
+ Personality(Personality_), PersonalityEncoding(PersonalityEncoding_),
+ LsdaEncoding(LsdaEncoding_), IsSignalFrame(IsSignalFrame_) {
}
const MCSymbol* Personality;
unsigned PersonalityEncoding;
unsigned LsdaEncoding;
+ bool IsSignalFrame;
};
}
return CIEKey::getTombstoneKey();
}
static unsigned getHashValue(const CIEKey &Key) {
- FoldingSetNodeID ID;
- ID.AddPointer(Key.Personality);
- ID.AddInteger(Key.PersonalityEncoding);
- ID.AddInteger(Key.LsdaEncoding);
- return ID.ComputeHash();
+ return static_cast<unsigned>(hash_combine(Key.Personality,
+ Key.PersonalityEncoding,
+ Key.LsdaEncoding,
+ Key.IsSignalFrame));
}
static bool isEqual(const CIEKey &LHS,
const CIEKey &RHS) {
return LHS.Personality == RHS.Personality &&
LHS.PersonalityEncoding == RHS.PersonalityEncoding &&
- LHS.LsdaEncoding == RHS.LsdaEncoding;
+ LHS.LsdaEncoding == RHS.LsdaEncoding &&
+ LHS.IsSignalFrame == RHS.IsSignalFrame;
}
};
}
for (unsigned i = 0, n = FrameArray.size(); i < n; ++i) {
const MCDwarfFrameInfo &Frame = FrameArray[i];
CIEKey Key(Frame.Personality, Frame.PersonalityEncoding,
- Frame.LsdaEncoding);
+ Frame.LsdaEncoding, Frame.IsSignalFrame);
const MCSymbol *&CIEStart = IsEH ? CIEStarts[Key] : DummyDebugKey;
if (!CIEStart)
CIEStart = &Emitter.EmitCIE(Streamer, Frame.Personality,
Frame.PersonalityEncoding, Frame.Lsda,
+ Frame.IsSignalFrame,
Frame.LsdaEncoding);
FDEEnd = Emitter.EmitFDE(Streamer, *CIEStart, Frame);
projects / oota-llvm.git / blobdiff