//
// The LLVM Compiler Infrastructure
//
-// This file was developed by James M. Laskey and is distributed under the
-// University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/DataTypes.h"
#include "llvm/Support/Mangler.h"
+#include "llvm/System/Path.h"
#include "llvm/Target/TargetAsmInfo.h"
#include "llvm/Target/MRegisterInfo.h"
#include "llvm/Target/TargetData.h"
//===----------------------------------------------------------------------===//
/// DWLabel - Labels are used to track locations in the assembler file.
-/// Labels appear in the form <prefix><Tag><Number>, where the tag is a
-/// category of label (Ex. location) and number is a value unique in that
-/// category.
+/// Labels appear in the form @verbatim <prefix><Tag><Number> @endverbatim,
+/// where the tag is a category of label (Ex. location) and number is a value
+/// unique in that category.
class DWLabel {
public:
/// Tag - Label category tag. Should always be a staticly declared C string.
std::vector<DIEValue *> Values;
public:
- DIE(unsigned Tag)
+ explicit DIE(unsigned Tag)
: Abbrev(Tag, DW_CHILDREN_no)
, Offset(0)
, Size(0)
///
unsigned Type;
- DIEValue(unsigned T)
+ explicit DIEValue(unsigned T)
: Type(T)
{}
virtual ~DIEValue() {}
uint64_t Integer;
public:
- DIEInteger(uint64_t I) : DIEValue(isInteger), Integer(I) {}
+ explicit DIEInteger(uint64_t I) : DIEValue(isInteger), Integer(I) {}
// Implement isa/cast/dyncast.
static bool classof(const DIEInteger *) { return true; }
public:
const std::string String;
- DIEString(const std::string &S) : DIEValue(isString), String(S) {}
+ explicit DIEString(const std::string &S) : DIEValue(isString), String(S) {}
// Implement isa/cast/dyncast.
static bool classof(const DIEString *) { return true; }
const DWLabel Label;
- DIEDwarfLabel(const DWLabel &L) : DIEValue(isLabel), Label(L) {}
+ explicit DIEDwarfLabel(const DWLabel &L) : DIEValue(isLabel), Label(L) {}
// Implement isa/cast/dyncast.
static bool classof(const DIEDwarfLabel *) { return true; }
public:
const std::string Label;
- DIEObjectLabel(const std::string &L) : DIEValue(isAsIsLabel), Label(L) {}
+ explicit DIEObjectLabel(const std::string &L)
+ : DIEValue(isAsIsLabel), Label(L) {}
// Implement isa/cast/dyncast.
static bool classof(const DIEObjectLabel *) { return true; }
public:
DIE *Entry;
- DIEntry(DIE *E) : DIEValue(isEntry), Entry(E) {}
+ explicit DIEntry(DIE *E) : DIEValue(isEntry), Entry(E) {}
// Implement isa/cast/dyncast.
static bool classof(const DIEntry *) { return true; }
/// SubprogramCount - The running count of functions being compiled.
///
unsigned SubprogramCount;
+
+ /// Flavor - A unique string indicating what dwarf producer this is, used to
+ /// unique labels.
+ const char * const Flavor;
unsigned SetCounter;
- Dwarf(std::ostream &OS, AsmPrinter *A, const TargetAsmInfo *T)
+ Dwarf(std::ostream &OS, AsmPrinter *A, const TargetAsmInfo *T,
+ const char *flavor)
: O(OS)
, Asm(A)
, TAI(T)
, MF(NULL)
, MMI(NULL)
, SubprogramCount(0)
+ , Flavor(flavor)
, SetCounter(1)
{
}
AsmPrinter *getAsm() const { return Asm; }
MachineModuleInfo *getMMI() const { return MMI; }
const TargetAsmInfo *getTargetAsmInfo() const { return TAI; }
+ const TargetData *getTargetData() const { return TD; }
+ void PrintRelDirective(bool Force32Bit = false, bool isInSection = false)
+ const {
+ if (isInSection && TAI->getDwarfSectionOffsetDirective())
+ O << TAI->getDwarfSectionOffsetDirective();
+ else if (Force32Bit || TD->getPointerSize() == sizeof(int32_t))
+ O << TAI->getData32bitsDirective();
+ else
+ O << TAI->getData64bitsDirective();
+ }
+
/// PrintLabelName - Print label name in form used by Dwarf writer.
///
void PrintLabelName(DWLabel Label) const {
PrintLabelName(Label.Tag, Label.Number);
}
+ void PrintLabelName(const char *Tag, unsigned Number) const {
+ O << TAI->getPrivateGlobalPrefix() << Tag;
+ if (Number) O << Number;
+ }
+
void PrintLabelName(const char *Tag, unsigned Number,
- bool isInSection = false) const {
- if (isInSection && TAI->getDwarfSectionOffsetDirective())
- O << TAI->getDwarfSectionOffsetDirective() << Tag;
- else
- O << TAI->getPrivateGlobalPrefix() << Tag;
+ const char *Suffix) const {
+ O << TAI->getPrivateGlobalPrefix() << Tag;
if (Number) O << Number;
+ O << Suffix;
}
/// EmitLabel - Emit location label for internal use by Dwarf.
/// EmitReference - Emit a reference to a label.
///
- void EmitReference(DWLabel Label, bool IsPCRelative = false) const {
- EmitReference(Label.Tag, Label.Number, IsPCRelative);
+ void EmitReference(DWLabel Label, bool IsPCRelative = false,
+ bool Force32Bit = false) const {
+ EmitReference(Label.Tag, Label.Number, IsPCRelative, Force32Bit);
}
void EmitReference(const char *Tag, unsigned Number,
- bool IsPCRelative = false) const {
- if (TAI->getAddressSize() == sizeof(int32_t))
- O << TAI->getData32bitsDirective();
- else
- O << TAI->getData64bitsDirective();
-
+ bool IsPCRelative = false, bool Force32Bit = false) const {
+ PrintRelDirective(Force32Bit);
PrintLabelName(Tag, Number);
if (IsPCRelative) O << "-" << TAI->getPCSymbol();
}
- void EmitReference(const std::string &Name, bool IsPCRelative = false) const {
- if (TAI->getAddressSize() == sizeof(int32_t))
- O << TAI->getData32bitsDirective();
- else
- O << TAI->getData64bitsDirective();
-
+ void EmitReference(const std::string &Name, bool IsPCRelative = false,
+ bool Force32Bit = false) const {
+ PrintRelDirective(Force32Bit);
+
O << Name;
if (IsPCRelative) O << "-" << TAI->getPCSymbol();
bool IsSmall = false) {
if (TAI->needsSet()) {
O << "\t.set\t";
- PrintLabelName("set", SetCounter);
+ PrintLabelName("set", SetCounter, Flavor);
O << ",";
PrintLabelName(TagHi, NumberHi);
O << "-";
PrintLabelName(TagLo, NumberLo);
O << "\n";
-
- if (IsSmall || TAI->getAddressSize() == sizeof(int32_t))
- O << TAI->getData32bitsDirective();
- else
- O << TAI->getData64bitsDirective();
-
- PrintLabelName("set", SetCounter);
-
+
+ PrintRelDirective(IsSmall);
+ PrintLabelName("set", SetCounter, Flavor);
++SetCounter;
} else {
- if (IsSmall || TAI->getAddressSize() == sizeof(int32_t))
- O << TAI->getData32bitsDirective();
- else
- O << TAI->getData64bitsDirective();
+ PrintRelDirective(IsSmall);
PrintLabelName(TagHi, NumberHi);
O << "-";
bool printAbsolute = false;
if (TAI->needsSet()) {
O << "\t.set\t";
- PrintLabelName("set", SetCounter);
+ PrintLabelName("set", SetCounter, Flavor);
O << ",";
- PrintLabelName(Label, LabelNumber, true);
+ PrintLabelName(Label, LabelNumber);
if (isEH)
printAbsolute = TAI->isAbsoluteEHSectionOffsets();
PrintLabelName(Section, SectionNumber);
}
O << "\n";
-
- if (IsSmall || TAI->getAddressSize() == sizeof(int32_t))
- O << TAI->getData32bitsDirective();
- else
- O << TAI->getData64bitsDirective();
+
+ PrintRelDirective(IsSmall);
- PrintLabelName("set", SetCounter);
+ PrintLabelName("set", SetCounter, Flavor);
++SetCounter;
} else {
- if (IsSmall || TAI->getAddressSize() == sizeof(int32_t))
- O << TAI->getData32bitsDirective();
- else
- O << TAI->getData64bitsDirective();
+ PrintRelDirective(IsSmall, true);
- PrintLabelName(Label, LabelNumber, true);
+ PrintLabelName(Label, LabelNumber);
if (isEH)
printAbsolute = TAI->isAbsoluteEHSectionOffsets();
/// EmitFrameMoves - Emit frame instructions to describe the layout of the
/// frame.
void EmitFrameMoves(const char *BaseLabel, unsigned BaseLabelID,
- const std::vector<MachineMove> &Moves) {
+ const std::vector<MachineMove> &Moves, bool isEH) {
int stackGrowth =
Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
TargetFrameInfo::StackGrowsUp ?
- TAI->getAddressSize() : -TAI->getAddressSize();
+ TD->getPointerSize() : -TD->getPointerSize();
bool IsLocal = BaseLabel && strcmp(BaseLabel, "label") == 0;
for (unsigned i = 0, N = Moves.size(); i < N; ++i) {
} else {
Asm->EmitInt8(DW_CFA_def_cfa);
Asm->EOL("DW_CFA_def_cfa");
- Asm->EmitULEB128Bytes(RI->getDwarfRegNum(Src.getRegister()));
+ Asm->EmitULEB128Bytes(RI->getDwarfRegNum(Src.getRegister(), isEH));
Asm->EOL("Register");
}
if (Dst.isRegister()) {
Asm->EmitInt8(DW_CFA_def_cfa_register);
Asm->EOL("DW_CFA_def_cfa_register");
- Asm->EmitULEB128Bytes(RI->getDwarfRegNum(Dst.getRegister()));
+ Asm->EmitULEB128Bytes(RI->getDwarfRegNum(Dst.getRegister(), isEH));
Asm->EOL("Register");
} else {
assert(0 && "Machine move no supported yet.");
}
} else {
- unsigned Reg = RI->getDwarfRegNum(Src.getRegister());
+ unsigned Reg = RI->getDwarfRegNum(Src.getRegister(), isEH);
int Offset = Dst.getOffset() / stackGrowth;
if (Offset < 0) {
Asm->EOL("Offset");
} else if (Reg < 64) {
Asm->EmitInt8(DW_CFA_offset + Reg);
- Asm->EOL("DW_CFA_offset + Reg");
+ Asm->EOL("DW_CFA_offset + Reg (" + utostr(Reg) + ")");
Asm->EmitULEB128Bytes(Offset);
Asm->EOL("Offset");
} else {
std::vector<MachineMove> Moves;
FunctionDebugFrameInfo(unsigned Num, const std::vector<MachineMove> &M):
- Number(Num), Moves(M) { };
+ Number(Num), Moves(M) { }
};
std::vector<FunctionDebugFrameInfo> DebugFrames;
ValuesSet.InsertNode(Value, Where);
Values.push_back(Value);
} else {
+ // Already exists, reuse the previous one.
delete Block;
+ Block = cast<DIEBlock>(Value);
}
Die->AddValue(Attribute, Block->BestForm(), Value);
/// provided.
void AddAddress(DIE *Die, unsigned Attribute,
const MachineLocation &Location) {
- unsigned Reg = RI->getDwarfRegNum(Location.getRegister());
+ unsigned Reg = RI->getDwarfRegNum(Location.getRegister(), false);
DIEBlock *Block = new DIEBlock();
if (Location.isRegister()) {
///
DIE *ConstructPointerType(CompileUnit *Unit, const std::string &Name) {
DIE Buffer(DW_TAG_pointer_type);
- AddUInt(&Buffer, DW_AT_byte_size, 0, TAI->getAddressSize());
+ AddUInt(&Buffer, DW_AT_byte_size, 0, TD->getPointerSize());
if (!Name.empty()) AddString(&Buffer, DW_AT_name, DW_FORM_string, Name);
return Unit->AddDie(Buffer);
}
break;
}
- FromTy = dyn_cast<DerivedTypeDesc>(FromTy)->getFromType();
+ FromTy = cast<DerivedTypeDesc>(FromTy)->getFromType();
}
// Unless we have a bit field.
Asm->EmitInt16(DWARF_VERSION); Asm->EOL("DWARF version number");
EmitSectionOffset("abbrev_begin", "section_abbrev", 0, 0, true, false);
Asm->EOL("Offset Into Abbrev. Section");
- Asm->EmitInt8(TAI->getAddressSize()); Asm->EOL("Address Size (in bytes)");
+ Asm->EmitInt8(TD->getPointerSize()); Asm->EOL("Address Size (in bytes)");
EmitDIE(Die);
// FIXME - extra padding for gdb bug.
/// EmitDebugLines - Emit source line information.
///
void EmitDebugLines() {
+ // If there are no lines to emit (such as when we're using .loc directives
+ // to emit .debug_line information) don't emit a .debug_line header.
+ if (SectionSourceLines.empty())
+ return;
+
// Minimum line delta, thus ranging from -10..(255-10).
const int MinLineDelta = -(DW_LNS_fixed_advance_pc + 1);
// Maximum line delta, thus ranging from -10..(255-10).
// Define the line address.
Asm->EmitInt8(0); Asm->EOL("Extended Op");
- Asm->EmitInt8(TAI->getAddressSize() + 1); Asm->EOL("Op size");
+ Asm->EmitInt8(TD->getPointerSize() + 1); Asm->EOL("Op size");
Asm->EmitInt8(DW_LNE_set_address); Asm->EOL("DW_LNE_set_address");
EmitReference("label", LabelID); Asm->EOL("Location label");
// Define last address of section.
Asm->EmitInt8(0); Asm->EOL("Extended Op");
- Asm->EmitInt8(TAI->getAddressSize() + 1); Asm->EOL("Op size");
+ Asm->EmitInt8(TD->getPointerSize() + 1); Asm->EOL("Op size");
Asm->EmitInt8(DW_LNE_set_address); Asm->EOL("DW_LNE_set_address");
EmitReference("section_end", j + 1); Asm->EOL("Section end label");
int stackGrowth =
Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
TargetFrameInfo::StackGrowsUp ?
- TAI->getAddressSize() : -TAI->getAddressSize();
+ TD->getPointerSize() : -TD->getPointerSize();
// Start the dwarf frame section.
Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
Asm->EOL("CIE Code Alignment Factor");
Asm->EmitSLEB128Bytes(stackGrowth);
Asm->EOL("CIE Data Alignment Factor");
- Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister()));
+ Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister(), false));
Asm->EOL("CIE RA Column");
std::vector<MachineMove> Moves;
RI->getInitialFrameState(Moves);
- EmitFrameMoves(NULL, 0, Moves);
+ EmitFrameMoves(NULL, 0, Moves, false);
Asm->EmitAlignment(2);
EmitLabel("debug_frame_common_end", 0);
"func_begin", DebugFrameInfo.Number);
Asm->EOL("FDE address range");
- EmitFrameMoves("func_begin", DebugFrameInfo.Number, DebugFrameInfo.Moves);
+ EmitFrameMoves("func_begin", DebugFrameInfo.Number, DebugFrameInfo.Moves, false);
Asm->EmitAlignment(2);
EmitLabel("debug_frame_end", DebugFrameInfo.Number);
EmitReference("info_begin", Unit->getID());
Asm->EOL("Offset of Compilation Unit Info");
- Asm->EmitInt8(TAI->getAddressSize()); Asm->EOL("Size of Address");
+ Asm->EmitInt8(TD->getPointerSize()); Asm->EOL("Size of Address");
Asm->EmitInt8(0); Asm->EOL("Size of Segment Descriptor");
Asm->EmitInt32(0); Asm->EOL("EOM (1)");
Asm->EmitInt32(0); Asm->EOL("EOM (2)");
+ #endif
Asm->EOL();
- #endif
}
/// EmitDebugRanges - Emit visible names into a debug ranges section.
// Main entry points.
//
DwarfDebug(std::ostream &OS, AsmPrinter *A, const TargetAsmInfo *T)
- : Dwarf(OS, A, T)
+ : Dwarf(OS, A, T, "dbg")
, CompileUnits()
, AbbreviationsSet(InitAbbreviationsSetSize)
, Abbreviations()
MMI = mmi;
shouldEmit = true;
- // Emit initial sections
- EmitInitial();
-
// Create all the compile unit DIEs.
ConstructCompileUnitDIEs();
// Prime section data.
SectionMap.insert(TAI->getTextSection());
+
+ // Print out .file directives to specify files for .loc directives. These
+ // are printed out early so that they precede any .loc directives.
+ if (TAI->hasDotLocAndDotFile()) {
+ const UniqueVector<SourceFileInfo> &SourceFiles = MMI->getSourceFiles();
+ const UniqueVector<std::string> &Directories = MMI->getDirectories();
+ for (unsigned i = 1, e = SourceFiles.size(); i <= e; ++i) {
+ sys::Path FullPath(Directories[SourceFiles[i].getDirectoryID()]);
+ bool AppendOk = FullPath.appendComponent(SourceFiles[i].getName());
+ assert(AppendOk && "Could not append filename to directory!");
+ Asm->EmitFile(i, FullPath.toString());
+ Asm->EOL();
+ }
+ }
+
+ // Emit initial sections
+ EmitInitial();
}
}
bool hasCalls;
bool hasLandingPads;
std::vector<MachineMove> Moves;
+ Function::LinkageTypes linkage;
FunctionEHFrameInfo(const std::string &FN, unsigned Num, unsigned P,
bool hC, bool hL,
- const std::vector<MachineMove> &M):
+ const std::vector<MachineMove> &M,
+ Function::LinkageTypes l):
FnName(FN), Number(Num), PersonalityIndex(P),
- hasCalls(hC), hasLandingPads(hL), Moves(M) { };
+ hasCalls(hC), hasLandingPads(hL), Moves(M),
+ linkage(l) { }
};
std::vector<FunctionEHFrameInfo> EHFrames;
int stackGrowth =
Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
TargetFrameInfo::StackGrowsUp ?
- TAI->getAddressSize() : -TAI->getAddressSize();
+ TD->getPointerSize() : -TD->getPointerSize();
// Begin eh frame section.
Asm->SwitchToTextSection(TAI->getDwarfEHFrameSection());
Asm->EOL("CIE Code Alignment Factor");
Asm->EmitSLEB128Bytes(stackGrowth);
Asm->EOL("CIE Data Alignment Factor");
- Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister()));
+ Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister(), true));
Asm->EOL("CIE RA Column");
// If there is a personality, we need to indicate the functions location.
if (Personality) {
Asm->EmitULEB128Bytes(7);
Asm->EOL("Augmentation Size");
- Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4);
- Asm->EOL("Personality (pcrel sdata4)");
+
+ if (TAI->getNeedsIndirectEncoding())
+ Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4 | DW_EH_PE_indirect);
+ else
+ Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4);
+
+ Asm->EOL("Personality (pcrel sdata4 indirect)");
- O << TAI->getData32bitsDirective();
+ PrintRelDirective();
+ O << TAI->getPersonalityPrefix();
Asm->EmitExternalGlobal((const GlobalVariable *)(Personality));
+ O << TAI->getPersonalitySuffix();
O << "-" << TAI->getPCSymbol();
Asm->EOL("Personality");
-
+
Asm->EmitULEB128Bytes(DW_EH_PE_pcrel);
Asm->EOL("LSDA Encoding (pcrel)");
Asm->EmitULEB128Bytes(DW_EH_PE_pcrel);
// Indicate locations of general callee saved registers in frame.
std::vector<MachineMove> Moves;
RI->getInitialFrameState(Moves);
- EmitFrameMoves(NULL, 0, Moves);
+ EmitFrameMoves(NULL, 0, Moves, true);
Asm->EmitAlignment(2);
EmitLabel("eh_frame_common_end", Index);
Asm->SwitchToTextSection(TAI->getDwarfEHFrameSection());
// Externally visible entry into the functions eh frame info.
- if (const char *GlobalDirective = TAI->getGlobalDirective())
- O << GlobalDirective << EHFrameInfo.FnName << ".eh\n";
-
+ // If the corresponding function is static, this should not be
+ // externally visible.
+ if (EHFrameInfo.linkage != Function::InternalLinkage) {
+ if (const char *GlobalEHDirective = TAI->getGlobalEHDirective())
+ O << GlobalEHDirective << EHFrameInfo.FnName << "\n";
+ }
+
// If there are no calls then you can't unwind.
if (!EHFrameInfo.hasCalls) {
- O << EHFrameInfo.FnName << ".eh = 0\n";
+ O << EHFrameInfo.FnName << " = 0\n";
} else {
- O << EHFrameInfo.FnName << ".eh:\n";
-
+ O << EHFrameInfo.FnName << ":\n";
+
+ // If corresponding function is weak definition, this should be too.
+ if ((EHFrameInfo.linkage == Function::WeakLinkage ||
+ EHFrameInfo.linkage == Function::LinkOnceLinkage) &&
+ TAI->getWeakDefDirective())
+ O << TAI->getWeakDefDirective() << EHFrameInfo.FnName << "\n";
+
// EH frame header.
EmitDifference("eh_frame_end", EHFrameInfo.Number,
"eh_frame_begin", EHFrameInfo.Number, true);
if (EHFrameInfo.hasLandingPads) {
EmitReference("exception", EHFrameInfo.Number, true);
- } else if(TAI->getAddressSize() == 8) {
+ } else if (TD->getPointerSize() == 8) {
Asm->EmitInt64((int)0);
} else {
Asm->EmitInt32((int)0);
// Indicate locations of function specific callee saved registers in
// frame.
- EmitFrameMoves("eh_func_begin", EHFrameInfo.Number, EHFrameInfo.Moves);
+ EmitFrameMoves("eh_func_begin", EHFrameInfo.Number, EHFrameInfo.Moves, true);
Asm->EmitAlignment(2);
EmitLabel("eh_frame_end", EHFrameInfo.Number);
}
if (const char *UsedDirective = TAI->getUsedDirective())
- O << UsedDirective << EHFrameInfo.FnName << ".eh\n\n";
+ O << UsedDirective << EHFrameInfo.FnName << "\n\n";
}
- /// EmitExceptionTable - Emit landpads and actions.
+ /// EmitExceptionTable - Emit landing pads and actions.
///
/// The general organization of the table is complex, but the basic concepts
/// are easy. First there is a header which describes the location and
static inline unsigned getEmptyKey() { return -1U; }
static inline unsigned getTombstoneKey() { return -2U; }
static unsigned getHashValue(const unsigned &Key) { return Key; }
+ static bool isEqual(unsigned LHS, unsigned RHS) { return LHS == RHS; }
static bool isPod() { return true; }
};
- struct PadSite {
- unsigned PadIndex;
- unsigned SiteIndex;
- };
-
- typedef DenseMap<unsigned, PadSite, KeyInfo> PadMapType;
-
+ /// ActionEntry - Structure describing an entry in the actions table.
struct ActionEntry {
int ValueForTypeID; // The value to write - may not be equal to the type id.
int NextAction;
struct ActionEntry *Previous;
};
+ /// PadRange - Structure holding a try-range and the associated landing pad.
+ struct PadRange {
+ // The index of the landing pad.
+ unsigned PadIndex;
+ // The index of the begin and end labels in the landing pad's label lists.
+ unsigned RangeIndex;
+ };
+
+ typedef DenseMap<unsigned, PadRange, KeyInfo> RangeMapType;
+
+ /// CallSiteEntry - Structure describing an entry in the call-site table.
+ struct CallSiteEntry {
+ // The 'try-range' is BeginLabel .. EndLabel.
+ unsigned BeginLabel; // zero indicates the start of the function.
+ unsigned EndLabel; // zero indicates the end of the function.
+ // The landing pad starts at PadLabel.
+ unsigned PadLabel; // zero indicates that there is no landing pad.
+ unsigned Action;
+ };
+
void EmitExceptionTable() {
// Map all labels and get rid of any dead landing pads.
MMI->TidyLandingPads();
LandingPads.push_back(&PadInfos[i]);
std::sort(LandingPads.begin(), LandingPads.end(), PadLT);
- // Gather first action index for each landing pad site.
- SmallVector<unsigned, 64> FirstActions;
- FirstActions.reserve(PadInfos.size());
-
- // The actions table.
- SmallVector<ActionEntry, 32> Actions;
-
// Negative type ids index into FilterIds, positive type ids index into
// TypeInfos. The value written for a positive type id is just the type
// id itself. For a negative type id, however, the value written is the
for(std::vector<unsigned>::const_iterator I = FilterIds.begin(),
E = FilterIds.end(); I != E; ++I) {
FilterOffsets.push_back(Offset);
- Offset -= Asm->SizeSLEB128(*I);
+ Offset -= Asm->SizeULEB128(*I);
}
- // Compute sizes for exception table.
- unsigned SizeSites = 0;
- unsigned SizeActions = 0;
+ // Compute the actions table and gather the first action index for each
+ // landing pad site.
+ SmallVector<ActionEntry, 32> Actions;
+ SmallVector<unsigned, 64> FirstActions;
+ FirstActions.reserve(LandingPads.size());
- // Look at each landing pad site to compute size. We need the size of each
- // landing pad site info and the size of the landing pad's actions.
int FirstAction = 0;
-
+ unsigned SizeActions = 0;
for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
const LandingPadInfo *LP = LandingPads[i];
const std::vector<int> &TypeIds = LP->TypeIds;
// Compute this sites contribution to size.
SizeActions += SizeSiteActions;
- unsigned M = LP->BeginLabels.size();
- SizeSites += M*(sizeof(int32_t) + // Site start.
- sizeof(int32_t) + // Site length.
- sizeof(int32_t) + // Landing pad.
- Asm->SizeULEB128(FirstAction)); // Action.
}
-
+
+ // Compute the call-site table. The entry for an invoke has a try-range
+ // containing the call, a non-zero landing pad and an appropriate action.
+ // The entry for an ordinary call has a try-range containing the call and
+ // zero for the landing pad and the action. Calls marked 'nounwind' have
+ // no entry and must not be contained in the try-range of any entry - they
+ // form gaps in the table. Entries must be ordered by try-range address.
+ SmallVector<CallSiteEntry, 64> CallSites;
+
+ RangeMapType PadMap;
+ // Invokes and nounwind calls have entries in PadMap (due to being bracketed
+ // by try-range labels when lowered). Ordinary calls do not, so appropriate
+ // try-ranges for them need be deduced.
+ for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
+ const LandingPadInfo *LandingPad = LandingPads[i];
+ for (unsigned j = 0, E = LandingPad->BeginLabels.size(); j != E; ++j) {
+ unsigned BeginLabel = LandingPad->BeginLabels[j];
+ assert(!PadMap.count(BeginLabel) && "Duplicate landing pad labels!");
+ PadRange P = { i, j };
+ PadMap[BeginLabel] = P;
+ }
+ }
+
+ // The end label of the previous invoke or nounwind try-range.
+ unsigned LastLabel = 0;
+
+ // Whether there is a potentially throwing instruction (currently this means
+ // an ordinary call) between the end of the previous try-range and now.
+ bool SawPotentiallyThrowing = false;
+
+ // Whether the last callsite entry was for an invoke.
+ bool PreviousIsInvoke = false;
+
+ // Visit all instructions in order of address.
+ for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
+ I != E; ++I) {
+ for (MachineBasicBlock::const_iterator MI = I->begin(), E = I->end();
+ MI != E; ++MI) {
+ if (MI->getOpcode() != TargetInstrInfo::LABEL) {
+ SawPotentiallyThrowing |= MI->getDesc()->isCall();
+ continue;
+ }
+
+ unsigned BeginLabel = MI->getOperand(0).getImm();
+ assert(BeginLabel && "Invalid label!");
+
+ // End of the previous try-range?
+ if (BeginLabel == LastLabel)
+ SawPotentiallyThrowing = false;
+
+ // Beginning of a new try-range?
+ RangeMapType::iterator L = PadMap.find(BeginLabel);
+ if (L == PadMap.end())
+ // Nope, it was just some random label.
+ continue;
+
+ PadRange P = L->second;
+ const LandingPadInfo *LandingPad = LandingPads[P.PadIndex];
+
+ assert(BeginLabel == LandingPad->BeginLabels[P.RangeIndex] &&
+ "Inconsistent landing pad map!");
+
+ // If some instruction between the previous try-range and this one may
+ // throw, create a call-site entry with no landing pad for the region
+ // between the try-ranges.
+ if (SawPotentiallyThrowing) {
+ CallSiteEntry Site = {LastLabel, BeginLabel, 0, 0};
+ CallSites.push_back(Site);
+ PreviousIsInvoke = false;
+ }
+
+ LastLabel = LandingPad->EndLabels[P.RangeIndex];
+ assert(BeginLabel && LastLabel && "Invalid landing pad!");
+
+ if (LandingPad->LandingPadLabel) {
+ // This try-range is for an invoke.
+ CallSiteEntry Site = {BeginLabel, LastLabel,
+ LandingPad->LandingPadLabel, FirstActions[P.PadIndex]};
+
+ // Try to merge with the previous call-site.
+ if (PreviousIsInvoke) {
+ CallSiteEntry &Prev = CallSites[CallSites.size()-1];
+ if (Site.PadLabel == Prev.PadLabel && Site.Action == Prev.Action) {
+ // Extend the range of the previous entry.
+ Prev.EndLabel = Site.EndLabel;
+ continue;
+ }
+ }
+
+ // Otherwise, create a new call-site.
+ CallSites.push_back(Site);
+ PreviousIsInvoke = true;
+ } else {
+ // Create a gap.
+ PreviousIsInvoke = false;
+ }
+ }
+ }
+ // If some instruction between the previous try-range and the end of the
+ // function may throw, create a call-site entry with no landing pad for the
+ // region following the try-range.
+ if (SawPotentiallyThrowing) {
+ CallSiteEntry Site = {LastLabel, 0, 0, 0};
+ CallSites.push_back(Site);
+ }
+
// Final tallies.
- unsigned SizeTypes = TypeInfos.size() * TAI->getAddressSize();
+ unsigned SizeSites = CallSites.size() * (sizeof(int32_t) + // Site start.
+ sizeof(int32_t) + // Site length.
+ sizeof(int32_t)); // Landing pad.
+ for (unsigned i = 0, e = CallSites.size(); i < e; ++i)
+ SizeSites += Asm->SizeULEB128(CallSites[i].Action);
+
+ unsigned SizeTypes = TypeInfos.size() * TD->getPointerSize();
unsigned TypeOffset = sizeof(int8_t) + // Call site format
Asm->SizeULEB128(SizeSites) + // Call-site table length
Asm->EmitULEB128Bytes(SizeSites);
Asm->EOL("Call-site table length");
- // Emit the landing pad site information in order of address.
- PadMapType PadMap;
+ // Emit the landing pad site information.
+ for (unsigned i = 0; i < CallSites.size(); ++i) {
+ CallSiteEntry &S = CallSites[i];
+ const char *BeginTag;
+ unsigned BeginNumber;
- for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
- const LandingPadInfo *LandingPad = LandingPads[i];
- for (unsigned j=0, E = LandingPad->BeginLabels.size(); j != E; ++j) {
- unsigned BeginLabel = LandingPad->BeginLabels[j];
- assert(!PadMap.count(BeginLabel) && "duplicate landing pad labels!");
- PadSite P = { i, j };
- PadMap[BeginLabel] = P;
+ if (!S.BeginLabel) {
+ BeginTag = "eh_func_begin";
+ BeginNumber = SubprogramCount;
+ } else {
+ BeginTag = "label";
+ BeginNumber = S.BeginLabel;
}
- }
-
- for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
- I != E; ++I) {
- for (MachineBasicBlock::const_iterator MI = I->begin(), E = I->end();
- MI != E; ++MI) {
- if (MI->getOpcode() != TargetInstrInfo::LABEL)
- continue;
- unsigned BeginLabel = MI->getOperand(0).getImmedValue();
- PadMapType::iterator L = PadMap.find(BeginLabel);
+ EmitSectionOffset(BeginTag, "eh_func_begin", BeginNumber, SubprogramCount,
+ false, true);
+ Asm->EOL("Region start");
- if (L == PadMap.end())
- continue;
-
- PadSite P = L->second;
- const LandingPadInfo *LandingPad = LandingPads[P.PadIndex];
-
- assert(BeginLabel == LandingPad->BeginLabels[P.SiteIndex] &&
- "Inconsistent landing pad map!");
+ if (!S.EndLabel) {
+ EmitDifference("eh_func_end", SubprogramCount, BeginTag, BeginNumber);
+ } else {
+ EmitDifference("label", S.EndLabel, BeginTag, BeginNumber);
+ }
+ Asm->EOL("Region length");
- EmitSectionOffset("label", "eh_func_begin", BeginLabel, SubprogramCount,
+ if (!S.PadLabel) {
+ if (TD->getPointerSize() == sizeof(int32_t))
+ Asm->EmitInt32(0);
+ else
+ Asm->EmitInt64(0);
+ } else {
+ EmitSectionOffset("label", "eh_func_begin", S.PadLabel, SubprogramCount,
false, true);
- Asm->EOL("Region start");
-
- EmitDifference("label", LandingPad->EndLabels[P.SiteIndex],
- "label", BeginLabel);
- Asm->EOL("Region length");
-
- if (LandingPad->TypeIds.empty()) {
- if (TAI->getAddressSize() == sizeof(int32_t))
- Asm->EmitInt32(0);
- else
- Asm->EmitInt64(0);
- } else {
- EmitSectionOffset("label", "eh_func_begin",
- LandingPad->LandingPadLabel, SubprogramCount,
- false, true);
- }
- Asm->EOL("Landing pad");
-
- Asm->EmitULEB128Bytes(FirstActions[P.PadIndex]);
- Asm->EOL("Action");
}
+ Asm->EOL("Landing pad");
+
+ Asm->EmitULEB128Bytes(S.Action);
+ Asm->EOL("Action");
}
// Emit the actions.
// Emit the type ids.
for (unsigned M = TypeInfos.size(); M; --M) {
GlobalVariable *GV = TypeInfos[M - 1];
-
- if (TAI->getAddressSize() == sizeof(int32_t))
- O << TAI->getData32bitsDirective();
- else
- O << TAI->getData64bitsDirective();
+
+ PrintRelDirective();
if (GV)
O << Asm->getGlobalLinkName(GV);
else
O << "0";
-
+
Asm->EOL("TypeInfo");
}
// Emit the filter typeids.
for (unsigned j = 0, M = FilterIds.size(); j < M; ++j) {
unsigned TypeID = FilterIds[j];
- Asm->EmitSLEB128Bytes(TypeID);
+ Asm->EmitULEB128Bytes(TypeID);
Asm->EOL("Filter TypeInfo index");
}
-
+
Asm->EmitAlignment(2);
}
// Main entry points.
//
DwarfException(std::ostream &OS, AsmPrinter *A, const TargetAsmInfo *T)
- : Dwarf(OS, A, T)
+ : Dwarf(OS, A, T, "eh")
, shouldEmit(false)
{}
const std::vector<Function *> Personalities = MMI->getPersonalities();
for (unsigned i =0; i < Personalities.size(); ++i)
EmitCommonEHFrame(Personalities[i], i);
-
+
for (std::vector<FunctionEHFrameInfo>::iterator I = EHFrames.begin(),
E = EHFrames.end(); I != E; ++I)
EmitEHFrame(*I);
EmitExceptionTable();
// Save EH frame information
- EHFrames.push_back(FunctionEHFrameInfo(getAsm()->CurrentFnName,
- SubprogramCount,
- MMI->getPersonalityIndex(),
- MF->getFrameInfo()->hasCalls(),
- !MMI->getLandingPads().empty(),
- MMI->getFrameMoves()));
+ EHFrames.
+ push_back(FunctionEHFrameInfo(getAsm()->getCurrentFunctionEHName(MF),
+ SubprogramCount,
+ MMI->getPersonalityIndex(),
+ MF->getFrameInfo()->hasCalls(),
+ !MMI->getLandingPads().empty(),
+ MMI->getFrameMoves(),
+ MF->getFunction()->getLinkage()));
}
};
/// EmitValue - Emit label value.
///
void DIEDwarfLabel::EmitValue(DwarfDebug &DD, unsigned Form) {
- DD.EmitReference(Label);
+ bool IsSmall = Form == DW_FORM_data4;
+ DD.EmitReference(Label, false, IsSmall);
}
/// SizeOf - Determine size of label value in bytes.
///
unsigned DIEDwarfLabel::SizeOf(const DwarfDebug &DD, unsigned Form) const {
- return DD.getTargetAsmInfo()->getAddressSize();
+ if (Form == DW_FORM_data4) return 4;
+ return DD.getTargetData()->getPointerSize();
}
//===----------------------------------------------------------------------===//
/// EmitValue - Emit label value.
///
void DIEObjectLabel::EmitValue(DwarfDebug &DD, unsigned Form) {
- DD.EmitReference(Label);
+ bool IsSmall = Form == DW_FORM_data4;
+ DD.EmitReference(Label, false, IsSmall);
}
/// SizeOf - Determine size of label value in bytes.
///
unsigned DIEObjectLabel::SizeOf(const DwarfDebug &DD, unsigned Form) const {
- return DD.getTargetAsmInfo()->getAddressSize();
+ if (Form == DW_FORM_data4) return 4;
+ return DD.getTargetData()->getPointerSize();
}
//===----------------------------------------------------------------------===//
///
unsigned DIEDelta::SizeOf(const DwarfDebug &DD, unsigned Form) const {
if (Form == DW_FORM_data4) return 4;
- return DD.getTargetAsmInfo()->getAddressSize();
+ return DD.getTargetData()->getPointerSize();
}
//===----------------------------------------------------------------------===//
projects / oota-llvm.git / blobdiff