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Diffstat (limited to 'lib/CodeGen/AsmPrinter/DwarfDebug.cpp')
-rw-r--r--lib/CodeGen/AsmPrinter/DwarfDebug.cpp442
1 files changed, 168 insertions, 274 deletions
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 26da800..8845bfa 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -56,10 +56,6 @@ static cl::opt<bool> UnknownLocations("use-unknown-locations", cl::Hidden,
cl::desc("Make an absence of debug location information explicit."),
cl::init(false));
-#ifndef NDEBUG
-STATISTIC(BlocksWithoutLineNo, "Number of blocks without any line number");
-#endif
-
namespace {
const char *DWARFGroupName = "DWARF Emission";
const char *DbgTimerName = "DWARF Debug Writer";
@@ -260,7 +256,7 @@ DwarfDebug::DwarfDebug(AsmPrinter *A, Module *M)
CurrentFnDbgScope(0), PrevLabel(NULL) {
NextStringPoolNumber = 0;
- DwarfFrameSectionSym = DwarfInfoSectionSym = DwarfAbbrevSectionSym = 0;
+ DwarfInfoSectionSym = DwarfAbbrevSectionSym = 0;
DwarfStrSectionSym = TextSectionSym = 0;
DwarfDebugRangeSectionSym = DwarfDebugLocSectionSym = 0;
FunctionBeginSym = FunctionEndSym = 0;
@@ -332,6 +328,11 @@ DIE *DwarfDebug::createSubprogramDIE(DISubprogram SP) {
// Add function template parameters.
SPCU->addTemplateParams(*SPDie, SP.getTemplateParams());
+ StringRef LinkageName = SP.getLinkageName();
+ if (!LinkageName.empty())
+ SPCU->addString(SPDie, dwarf::DW_AT_MIPS_linkage_name, dwarf::DW_FORM_string,
+ getRealLinkageName(LinkageName));
+
// If this DIE is going to refer declaration info using AT_specification
// then there is no need to add other attributes.
if (SP.getFunctionDeclaration().isSubprogram())
@@ -342,11 +343,6 @@ DIE *DwarfDebug::createSubprogramDIE(DISubprogram SP) {
SPCU->addString(SPDie, dwarf::DW_AT_name, dwarf::DW_FORM_string,
SP.getName());
- StringRef LinkageName = SP.getLinkageName();
- if (!LinkageName.empty())
- SPCU->addString(SPDie, dwarf::DW_AT_MIPS_linkage_name, dwarf::DW_FORM_string,
- getRealLinkageName(LinkageName));
-
SPCU->addSourceLine(SPDie, SP);
if (SP.isPrototyped())
@@ -588,12 +584,14 @@ DIE *DwarfDebug::constructInlinedScopeDIE(DbgScope *Scope) {
if (!Scope->getScopeNode())
return NULL;
DIScope DS(Scope->getScopeNode());
- DIE *ScopeDIE = new DIE(dwarf::DW_TAG_inlined_subroutine);
-
DISubprogram InlinedSP = getDISubprogram(DS);
CompileUnit *TheCU = getCompileUnit(InlinedSP);
DIE *OriginDIE = TheCU->getDIE(InlinedSP);
- assert(OriginDIE && "Unable to find Origin DIE!");
+ if (!OriginDIE) {
+ DEBUG(dbgs() << "Unable to find original DIE for inlined subprogram.");
+ return NULL;
+ }
+ DIE *ScopeDIE = new DIE(dwarf::DW_TAG_inlined_subroutine);
TheCU->addDIEEntry(ScopeDIE, dwarf::DW_AT_abstract_origin,
dwarf::DW_FORM_ref4, OriginDIE);
@@ -714,8 +712,9 @@ DIE *DwarfDebug::constructVariableDIE(DbgVariable *DV, DbgScope *Scope) {
updated = true;
}
else if (DVInsn->getOperand(0).isImm())
- updated = VariableCU->addConstantValue(VariableDie,
- DVInsn->getOperand(0));
+ updated =
+ VariableCU->addConstantValue(VariableDie, DVInsn->getOperand(0),
+ DV->getType());
else if (DVInsn->getOperand(0).isFPImm())
updated =
VariableCU->addConstantFPValue(VariableDie, DVInsn->getOperand(0));
@@ -750,26 +749,6 @@ DIE *DwarfDebug::constructVariableDIE(DbgVariable *DV, DbgScope *Scope) {
}
-void CompileUnit::addPubTypes(DISubprogram SP) {
- DICompositeType SPTy = SP.getType();
- unsigned SPTag = SPTy.getTag();
- if (SPTag != dwarf::DW_TAG_subroutine_type)
- return;
-
- DIArray Args = SPTy.getTypeArray();
- for (unsigned i = 0, e = Args.getNumElements(); i != e; ++i) {
- DIType ATy(Args.getElement(i));
- if (!ATy.Verify())
- continue;
- DICompositeType CATy = getDICompositeType(ATy);
- if (DIDescriptor(CATy).Verify() && !CATy.getName().empty()
- && !CATy.isForwardDecl()) {
- if (DIEEntry *Entry = getDIEEntry(CATy))
- addGlobalType(CATy.getName(), Entry->getEntry());
- }
- }
-}
-
/// constructScopeDIE - Construct a DIE for this scope.
DIE *DwarfDebug::constructScopeDIE(DbgScope *Scope) {
if (!Scope || !Scope->getScopeNode())
@@ -840,11 +819,9 @@ unsigned DwarfDebug::GetOrCreateSourceID(StringRef FileName,
return GetOrCreateSourceID("<stdin>", StringRef());
// MCStream expects full path name as filename.
- if (!DirName.empty() && !FileName.startswith("/")) {
- std::string FullPathName(DirName.data());
- if (!DirName.endswith("/"))
- FullPathName += "/";
- FullPathName += FileName.data();
+ if (!DirName.empty() && !sys::path::is_absolute(FileName)) {
+ SmallString<128> FullPathName = DirName;
+ sys::path::append(FullPathName, FileName);
// Here FullPathName will be copied into StringMap by GetOrCreateSourceID.
return GetOrCreateSourceID(StringRef(FullPathName), StringRef());
}
@@ -862,20 +839,6 @@ unsigned DwarfDebug::GetOrCreateSourceID(StringRef FileName,
return SrcId;
}
-/// getOrCreateNameSpace - Create a DIE for DINameSpace.
-DIE *CompileUnit::getOrCreateNameSpace(DINameSpace NS) {
- DIE *NDie = getDIE(NS);
- if (NDie)
- return NDie;
- NDie = new DIE(dwarf::DW_TAG_namespace);
- insertDIE(NS, NDie);
- if (!NS.getName().empty())
- addString(NDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, NS.getName());
- addSourceLine(NDie, NS);
- addToContextOwner(NDie, NS.getContext());
- return NDie;
-}
-
/// constructCompileUnit - Create new CompileUnit for the given
/// metadata node with tag DW_TAG_compile_unit.
void DwarfDebug::constructCompileUnit(const MDNode *N) {
@@ -896,8 +859,8 @@ void DwarfDebug::constructCompileUnit(const MDNode *N) {
NewCU->addUInt(Die, dwarf::DW_AT_entry_pc, dwarf::DW_FORM_addr, 0);
// DW_AT_stmt_list is a offset of line number information for this
// compile unit in debug_line section.
- if (Asm->MAI->doesDwarfUsesAbsoluteLabelForStmtList())
- NewCU->addLabel(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_addr,
+ if(Asm->MAI->doesDwarfRequireRelocationForSectionOffset())
+ NewCU->addLabel(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_data4,
Asm->GetTempSymbol("section_line"));
else
NewCU->addUInt(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_data4, 0);
@@ -1020,12 +983,7 @@ void DwarfDebug::constructGlobalVariableDIE(const MDNode *N) {
getRealLinkageName(LinkageName));
// Add type.
TheCU->addType(VariableDIE, GTy);
- if (GTy.isCompositeType() && !GTy.getName().empty()
- && !GTy.isForwardDecl()) {
- DIEEntry *Entry = TheCU->getDIEEntry(GTy);
- assert(Entry && "Missing global type!");
- TheCU->addGlobalType(GTy.getName(), Entry->getEntry());
- }
+
// Add scoping info.
if (!GV.isLocalToUnit()) {
TheCU->addUInt(VariableDIE, dwarf::DW_AT_external, dwarf::DW_FORM_flag, 1);
@@ -1113,44 +1071,68 @@ void DwarfDebug::beginModule(Module *M) {
if (DisableDebugInfoPrinting)
return;
- DebugInfoFinder DbgFinder;
- DbgFinder.processModule(*M);
+ // If module has named metadata anchors then use them, otherwise scan the module
+ // using debug info finder to collect debug info.
+ NamedMDNode *CU_Nodes = M->getNamedMetadata("llvm.dbg.cu");
+ if (CU_Nodes) {
- bool HasDebugInfo = false;
+ NamedMDNode *GV_Nodes = M->getNamedMetadata("llvm.dbg.gv");
+ NamedMDNode *SP_Nodes = M->getNamedMetadata("llvm.dbg.sp");
+ if (!GV_Nodes && !SP_Nodes)
+ // If there are not any global variables or any functions then
+ // there is not any debug info in this module.
+ return;
- // Scan all the compile-units to see if there are any marked as the main unit.
- // if not, we do not generate debug info.
- for (DebugInfoFinder::iterator I = DbgFinder.compile_unit_begin(),
- E = DbgFinder.compile_unit_end(); I != E; ++I) {
- if (DICompileUnit(*I).isMain()) {
- HasDebugInfo = true;
- break;
- }
- }
+ for (unsigned i = 0, e = CU_Nodes->getNumOperands(); i != e; ++i)
+ constructCompileUnit(CU_Nodes->getOperand(i));
- if (!HasDebugInfo) return;
+ if (GV_Nodes)
+ for (unsigned i = 0, e = GV_Nodes->getNumOperands(); i != e; ++i)
+ constructGlobalVariableDIE(GV_Nodes->getOperand(i));
+
+ if (SP_Nodes)
+ for (unsigned i = 0, e = SP_Nodes->getNumOperands(); i != e; ++i)
+ constructSubprogramDIE(SP_Nodes->getOperand(i));
+
+ } else {
+ DebugInfoFinder DbgFinder;
+ DbgFinder.processModule(*M);
+
+ bool HasDebugInfo = false;
+ // Scan all the compile-units to see if there are any marked as the main unit.
+ // if not, we do not generate debug info.
+ for (DebugInfoFinder::iterator I = DbgFinder.compile_unit_begin(),
+ E = DbgFinder.compile_unit_end(); I != E; ++I) {
+ if (DICompileUnit(*I).isMain()) {
+ HasDebugInfo = true;
+ break;
+ }
+ }
+ if (!HasDebugInfo) return;
+
+ // Create all the compile unit DIEs.
+ for (DebugInfoFinder::iterator I = DbgFinder.compile_unit_begin(),
+ E = DbgFinder.compile_unit_end(); I != E; ++I)
+ constructCompileUnit(*I);
+
+ // Create DIEs for each global variable.
+ for (DebugInfoFinder::iterator I = DbgFinder.global_variable_begin(),
+ E = DbgFinder.global_variable_end(); I != E; ++I)
+ constructGlobalVariableDIE(*I);
+
+ // Create DIEs for each subprogram.
+ for (DebugInfoFinder::iterator I = DbgFinder.subprogram_begin(),
+ E = DbgFinder.subprogram_end(); I != E; ++I)
+ constructSubprogramDIE(*I);
+ }
+
// Tell MMI that we have debug info.
MMI->setDebugInfoAvailability(true);
-
+
// Emit initial sections.
EmitSectionLabels();
- // Create all the compile unit DIEs.
- for (DebugInfoFinder::iterator I = DbgFinder.compile_unit_begin(),
- E = DbgFinder.compile_unit_end(); I != E; ++I)
- constructCompileUnit(*I);
-
- // Create DIEs for each subprogram.
- for (DebugInfoFinder::iterator I = DbgFinder.subprogram_begin(),
- E = DbgFinder.subprogram_end(); I != E; ++I)
- constructSubprogramDIE(*I);
-
- // Create DIEs for each global variable.
- for (DebugInfoFinder::iterator I = DbgFinder.global_variable_begin(),
- E = DbgFinder.global_variable_end(); I != E; ++I)
- constructGlobalVariableDIE(*I);
-
//getOrCreateTypeDIE
if (NamedMDNode *NMD = M->getNamedMetadata("llvm.dbg.enum"))
for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
@@ -1239,14 +1221,6 @@ void DwarfDebug::endModule() {
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("section_end", i));
}
- // Emit common frame information.
- emitCommonDebugFrame();
-
- // Emit function debug frame information
- for (std::vector<FunctionDebugFrameInfo>::iterator I = DebugFrames.begin(),
- E = DebugFrames.end(); I != E; ++I)
- emitFunctionDebugFrame(*I);
-
// Compute DIE offsets and sizes.
computeSizeAndOffsets();
@@ -1434,15 +1408,10 @@ DwarfDebug::collectVariableInfo(const MachineFunction *MF,
HI = History.begin(), HE = History.end(); HI != HE; ++HI) {
const MachineInstr *Begin = *HI;
assert(Begin->isDebugValue() && "Invalid History entry");
- MachineLocation MLoc;
- if (Begin->getNumOperands() == 3) {
- if (Begin->getOperand(0).isReg() && Begin->getOperand(1).isImm())
- MLoc.set(Begin->getOperand(0).getReg(), Begin->getOperand(1).getImm());
- } else
- MLoc = Asm->getDebugValueLocation(Begin);
- // FIXME: emitDebugLoc only understands registers.
- if (!MLoc.getReg())
+ // Check if DBG_VALUE is truncating a range.
+ if (Begin->getNumOperands() > 1 && Begin->getOperand(0).isReg()
+ && !Begin->getOperand(0).getReg())
continue;
// Compute the range for a register location.
@@ -1466,7 +1435,25 @@ DwarfDebug::collectVariableInfo(const MachineFunction *MF,
}
// The value is valid until the next DBG_VALUE or clobber.
- DotDebugLocEntries.push_back(DotDebugLocEntry(FLabel, SLabel, MLoc, Var));
+ MachineLocation MLoc;
+ if (Begin->getNumOperands() == 3) {
+ if (Begin->getOperand(0).isReg() && Begin->getOperand(1).isImm()) {
+ MLoc.set(Begin->getOperand(0).getReg(),
+ Begin->getOperand(1).getImm());
+ DotDebugLocEntries.
+ push_back(DotDebugLocEntry(FLabel, SLabel, MLoc, Var));
+ }
+ // FIXME: Handle isFPImm also.
+ else if (Begin->getOperand(0).isImm()) {
+ DotDebugLocEntries.
+ push_back(DotDebugLocEntry(FLabel, SLabel,
+ Begin->getOperand(0).getImm()));
+ }
+ } else {
+ MLoc = Asm->getDebugValueLocation(Begin);
+ DotDebugLocEntries.
+ push_back(DotDebugLocEntry(FLabel, SLabel, MLoc, Var));
+ }
}
DotDebugLocEntries.push_back(DotDebugLocEntry());
}
@@ -1503,12 +1490,17 @@ void DwarfDebug::beginInstruction(const MachineInstr *MI) {
if (!MI->isDebugValue()) {
DebugLoc DL = MI->getDebugLoc();
if (DL != PrevInstLoc && (!DL.isUnknown() || UnknownLocations)) {
+ unsigned Flags = DWARF2_FLAG_IS_STMT;
PrevInstLoc = DL;
+ if (DL == PrologEndLoc) {
+ Flags |= DWARF2_FLAG_PROLOGUE_END;
+ PrologEndLoc = DebugLoc();
+ }
if (!DL.isUnknown()) {
const MDNode *Scope = DL.getScope(Asm->MF->getFunction()->getContext());
- recordSourceLine(DL.getLine(), DL.getCol(), Scope);
+ recordSourceLine(DL.getLine(), DL.getCol(), Scope, Flags);
} else
- recordSourceLine(0, 0, 0);
+ recordSourceLine(0, 0, 0, 0);
}
}
@@ -1820,41 +1812,22 @@ void DwarfDebug::identifyScopeMarkers() {
}
}
-/// FindFirstDebugLoc - Find the first debug location in the function. This
-/// is intended to be an approximation for the source position of the
-/// beginning of the function.
-static DebugLoc FindFirstDebugLoc(const MachineFunction *MF) {
- for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
- I != E; ++I)
- for (MachineBasicBlock::const_iterator MBBI = I->begin(), MBBE = I->end();
- MBBI != MBBE; ++MBBI) {
- DebugLoc DL = MBBI->getDebugLoc();
- if (!DL.isUnknown())
- return DL;
- }
- return DebugLoc();
+/// getScopeNode - Get MDNode for DebugLoc's scope.
+static MDNode *getScopeNode(DebugLoc DL, const LLVMContext &Ctx) {
+ if (MDNode *InlinedAt = DL.getInlinedAt(Ctx))
+ return getScopeNode(DebugLoc::getFromDILocation(InlinedAt), Ctx);
+ return DL.getScope(Ctx);
}
-#ifndef NDEBUG
-/// CheckLineNumbers - Count basicblocks whose instructions do not have any
-/// line number information.
-static void CheckLineNumbers(const MachineFunction *MF) {
- for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
- I != E; ++I) {
- bool FoundLineNo = false;
- for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end();
- II != IE; ++II) {
- const MachineInstr *MI = II;
- if (!MI->getDebugLoc().isUnknown()) {
- FoundLineNo = true;
- break;
- }
- }
- if (!FoundLineNo && I->size())
- ++BlocksWithoutLineNo;
- }
+/// getFnDebugLoc - Walk up the scope chain of given debug loc and find
+/// line number info for the function.
+static DebugLoc getFnDebugLoc(DebugLoc DL, const LLVMContext &Ctx) {
+ const MDNode *Scope = getScopeNode(DL, Ctx);
+ DISubprogram SP = getDISubprogram(Scope);
+ if (SP.Verify())
+ return DebugLoc::get(SP.getLineNumber(), 0, SP);
+ return DebugLoc();
}
-#endif
/// beginFunction - Gather pre-function debug information. Assumes being
/// emitted immediately after the function entry point.
@@ -1862,44 +1835,16 @@ void DwarfDebug::beginFunction(const MachineFunction *MF) {
if (!MMI->hasDebugInfo()) return;
if (!extractScopeInformation()) return;
-#ifndef NDEBUG
- CheckLineNumbers(MF);
-#endif
-
FunctionBeginSym = Asm->GetTempSymbol("func_begin",
Asm->getFunctionNumber());
// Assumes in correct section after the entry point.
Asm->OutStreamer.EmitLabel(FunctionBeginSym);
- // Emit label for the implicitly defined dbg.stoppoint at the start of the
- // function.
- DebugLoc FDL = FindFirstDebugLoc(MF);
- if (FDL.isUnknown()) return;
-
- const MDNode *Scope = FDL.getScope(MF->getFunction()->getContext());
- const MDNode *TheScope = 0;
-
- DISubprogram SP = getDISubprogram(Scope);
- unsigned Line, Col;
- if (SP.Verify()) {
- Line = SP.getLineNumber();
- Col = 0;
- TheScope = SP;
- } else {
- Line = FDL.getLine();
- Col = FDL.getCol();
- TheScope = Scope;
- }
-
- recordSourceLine(Line, Col, TheScope);
-
assert(UserVariables.empty() && DbgValues.empty() && "Maps weren't cleaned");
/// ProcessedArgs - Collection of arguments already processed.
SmallPtrSet<const MDNode *, 8> ProcessedArgs;
-
const TargetRegisterInfo *TRI = Asm->TM.getRegisterInfo();
-
/// LiveUserVar - Map physreg numbers to the MDNode they contain.
std::vector<const MDNode*> LiveUserVar(TRI->getNumRegs());
@@ -1965,6 +1910,11 @@ void DwarfDebug::beginFunction(const MachineFunction *MF) {
if (!MI->isLabel())
AtBlockEntry = false;
+ // First known non DBG_VALUE location marks beginning of function
+ // body.
+ if (PrologEndLoc.isUnknown() && !MI->getDebugLoc().isUnknown())
+ PrologEndLoc = MI->getDebugLoc();
+
// Check if the instruction clobbers any registers with debug vars.
for (MachineInstr::const_mop_iterator MOI = MI->operands_begin(),
MOE = MI->operands_end(); MOI != MOE; ++MOI) {
@@ -2033,6 +1983,15 @@ void DwarfDebug::beginFunction(const MachineFunction *MF) {
PrevInstLoc = DebugLoc();
PrevLabel = FunctionBeginSym;
+
+ // Record beginning of function.
+ if (!PrologEndLoc.isUnknown()) {
+ DebugLoc FnStartDL = getFnDebugLoc(PrologEndLoc,
+ MF->getFunction()->getContext());
+ recordSourceLine(FnStartDL.getLine(), FnStartDL.getCol(),
+ FnStartDL.getScope(MF->getFunction()->getContext()),
+ DWARF2_FLAG_IS_STMT);
+ }
}
/// endFunction - Gather and emit post-function debug information.
@@ -2147,7 +2106,8 @@ DbgScope *DwarfDebug::findDbgScope(const MachineInstr *MInsn) {
/// recordSourceLine - Register a source line with debug info. Returns the
/// unique label that was emitted and which provides correspondence to
/// the source line list.
-void DwarfDebug::recordSourceLine(unsigned Line, unsigned Col, const MDNode *S){
+void DwarfDebug::recordSourceLine(unsigned Line, unsigned Col, const MDNode *S,
+ unsigned Flags) {
StringRef Fn;
StringRef Dir;
unsigned Src = 1;
@@ -2175,7 +2135,7 @@ void DwarfDebug::recordSourceLine(unsigned Line, unsigned Col, const MDNode *S){
Src = GetOrCreateSourceID(Fn, Dir);
}
- Asm->OutStreamer.EmitDwarfLocDirective(Src, Line, Col, DWARF2_FLAG_IS_STMT,
+ Asm->OutStreamer.EmitDwarfLocDirective(Src, Line, Col, Flags,
0, 0, Fn);
}
@@ -2264,11 +2224,6 @@ void DwarfDebug::EmitSectionLabels() {
const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
// Dwarf sections base addresses.
- if (Asm->MAI->doesDwarfRequireFrameSection()) {
- DwarfFrameSectionSym =
- EmitSectionSym(Asm, TLOF.getDwarfFrameSection(), "section_debug_frame");
- }
-
DwarfInfoSectionSym =
EmitSectionSym(Asm, TLOF.getDwarfInfoSection(), "section_info");
DwarfAbbrevSectionSym =
@@ -2476,91 +2431,6 @@ void DwarfDebug::emitEndOfLineMatrix(unsigned SectionEnd) {
Asm->EmitInt8(1);
}
-/// emitCommonDebugFrame - Emit common frame info into a debug frame section.
-///
-void DwarfDebug::emitCommonDebugFrame() {
- if (!Asm->MAI->doesDwarfRequireFrameSection())
- return;
-
- int stackGrowth = Asm->getTargetData().getPointerSize();
- if (Asm->TM.getFrameLowering()->getStackGrowthDirection() ==
- TargetFrameLowering::StackGrowsDown)
- stackGrowth *= -1;
-
- // Start the dwarf frame section.
- Asm->OutStreamer.SwitchSection(
- Asm->getObjFileLowering().getDwarfFrameSection());
-
- Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("debug_frame_common"));
- Asm->OutStreamer.AddComment("Length of Common Information Entry");
- Asm->EmitLabelDifference(Asm->GetTempSymbol("debug_frame_common_end"),
- Asm->GetTempSymbol("debug_frame_common_begin"), 4);
-
- Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("debug_frame_common_begin"));
- Asm->OutStreamer.AddComment("CIE Identifier Tag");
- Asm->EmitInt32((int)dwarf::DW_CIE_ID);
- Asm->OutStreamer.AddComment("CIE Version");
- Asm->EmitInt8(dwarf::DW_CIE_VERSION);
- Asm->OutStreamer.AddComment("CIE Augmentation");
- Asm->OutStreamer.EmitIntValue(0, 1, /*addrspace*/0); // nul terminator.
- Asm->EmitULEB128(1, "CIE Code Alignment Factor");
- Asm->EmitSLEB128(stackGrowth, "CIE Data Alignment Factor");
- Asm->OutStreamer.AddComment("CIE RA Column");
- const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo();
- const TargetFrameLowering *TFI = Asm->TM.getFrameLowering();
- Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister(), false));
-
- std::vector<MachineMove> Moves;
- TFI->getInitialFrameState(Moves);
-
- Asm->EmitFrameMoves(Moves, 0, false);
-
- Asm->EmitAlignment(2);
- Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("debug_frame_common_end"));
-}
-
-/// emitFunctionDebugFrame - Emit per function frame info into a debug frame
-/// section.
-void DwarfDebug::
-emitFunctionDebugFrame(const FunctionDebugFrameInfo &DebugFrameInfo) {
- if (!Asm->MAI->doesDwarfRequireFrameSection())
- return;
-
- // Start the dwarf frame section.
- Asm->OutStreamer.SwitchSection(
- Asm->getObjFileLowering().getDwarfFrameSection());
-
- Asm->OutStreamer.AddComment("Length of Frame Information Entry");
- MCSymbol *DebugFrameBegin =
- Asm->GetTempSymbol("debug_frame_begin", DebugFrameInfo.Number);
- MCSymbol *DebugFrameEnd =
- Asm->GetTempSymbol("debug_frame_end", DebugFrameInfo.Number);
- Asm->EmitLabelDifference(DebugFrameEnd, DebugFrameBegin, 4);
-
- Asm->OutStreamer.EmitLabel(DebugFrameBegin);
-
- Asm->OutStreamer.AddComment("FDE CIE offset");
- Asm->EmitSectionOffset(Asm->GetTempSymbol("debug_frame_common"),
- DwarfFrameSectionSym);
-
- Asm->OutStreamer.AddComment("FDE initial location");
- MCSymbol *FuncBeginSym =
- Asm->GetTempSymbol("func_begin", DebugFrameInfo.Number);
- Asm->OutStreamer.EmitSymbolValue(FuncBeginSym,
- Asm->getTargetData().getPointerSize(),
- 0/*AddrSpace*/);
-
-
- Asm->OutStreamer.AddComment("FDE address range");
- Asm->EmitLabelDifference(Asm->GetTempSymbol("func_end",DebugFrameInfo.Number),
- FuncBeginSym, Asm->getTargetData().getPointerSize());
-
- Asm->EmitFrameMoves(DebugFrameInfo.Moves, FuncBeginSym, false);
-
- Asm->EmitAlignment(2);
- Asm->OutStreamer.EmitLabel(DebugFrameEnd);
-}
-
/// emitDebugPubNames - Emit visible names into a debug pubnames section.
///
void DwarfDebug::emitDebugPubNames() {
@@ -2722,20 +2592,44 @@ void DwarfDebug::emitDebugLoc() {
Asm->OutStreamer.EmitSymbolValue(Entry.Begin, Size, 0);
Asm->OutStreamer.EmitSymbolValue(Entry.End, Size, 0);
DIVariable DV(Entry.Variable);
- if (DV.hasComplexAddress()) {
+ Asm->OutStreamer.AddComment("Loc expr size");
+ MCSymbol *begin = Asm->OutStreamer.getContext().CreateTempSymbol();
+ MCSymbol *end = Asm->OutStreamer.getContext().CreateTempSymbol();
+ Asm->EmitLabelDifference(end, begin, 2);
+ Asm->OutStreamer.EmitLabel(begin);
+ if (Entry.isConstant()) {
+ DIBasicType BTy(DV.getType());
+ if (BTy.Verify() &&
+ (BTy.getEncoding() == dwarf::DW_ATE_signed
+ || BTy.getEncoding() == dwarf::DW_ATE_signed_char)) {
+ Asm->OutStreamer.AddComment("DW_OP_consts");
+ Asm->EmitInt8(dwarf::DW_OP_consts);
+ Asm->EmitSLEB128(Entry.getConstant());
+ } else {
+ Asm->OutStreamer.AddComment("DW_OP_constu");
+ Asm->EmitInt8(dwarf::DW_OP_constu);
+ Asm->EmitULEB128(Entry.getConstant());
+ }
+ } else if (DV.hasComplexAddress()) {
unsigned N = DV.getNumAddrElements();
unsigned i = 0;
- Asm->OutStreamer.AddComment("Loc expr size");
if (N >= 2 && DV.getAddrElement(0) == DIBuilder::OpPlus) {
- // If first address element is OpPlus then emit
- // DW_OP_breg + Offset instead of DW_OP_reg + Offset.
- MachineLocation Loc(Entry.Loc.getReg(), DV.getAddrElement(1));
- Asm->EmitInt16(Asm->getDwarfRegOpSize(Loc) + N - 2);
- Asm->EmitDwarfRegOp(Loc);
-// Asm->EmitULEB128(DV.getAddrElement(1));
- i = 2;
+ if (Entry.Loc.getOffset()) {
+ i = 2;
+ Asm->EmitDwarfRegOp(Entry.Loc);
+ Asm->OutStreamer.AddComment("DW_OP_deref");
+ Asm->EmitInt8(dwarf::DW_OP_deref);
+ Asm->OutStreamer.AddComment("DW_OP_plus_uconst");
+ Asm->EmitInt8(dwarf::DW_OP_plus_uconst);
+ Asm->EmitSLEB128(DV.getAddrElement(1));
+ } else {
+ // If first address element is OpPlus then emit
+ // DW_OP_breg + Offset instead of DW_OP_reg + Offset.
+ MachineLocation Loc(Entry.Loc.getReg(), DV.getAddrElement(1));
+ Asm->EmitDwarfRegOp(Loc);
+ i = 2;
+ }
} else {
- Asm->EmitInt16(Asm->getDwarfRegOpSize(Entry.Loc) + N);
Asm->EmitDwarfRegOp(Entry.Loc);
}
@@ -2750,10 +2644,10 @@ void DwarfDebug::emitDebugLoc() {
else llvm_unreachable("unknown Opcode found in complex address");
}
} else {
- Asm->OutStreamer.AddComment("Loc expr size");
- Asm->EmitInt16(Asm->getDwarfRegOpSize(Entry.Loc));
+ // Regular entry.
Asm->EmitDwarfRegOp(Entry.Loc);
}
+ Asm->OutStreamer.EmitLabel(end);
}
}
}
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