#include "DwarfCompileUnit.h"
-
+#include "DwarfExpression.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/GlobalValue.h"
#include "llvm/Target/TargetFrameLowering.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetSubtargetInfo.h"
#include "llvm/Target/TargetRegisterInfo.h"
+#include "llvm/Target/TargetSubtargetInfo.h"
namespace llvm {
DwarfCompileUnit::DwarfCompileUnit(unsigned UID, DICompileUnit Node,
AsmPrinter *A, DwarfDebug *DW,
DwarfFile *DWU)
- : DwarfUnit(UID, dwarf::DW_TAG_compile_unit, Node, A, DW, DWU) {
+ : DwarfUnit(UID, dwarf::DW_TAG_compile_unit, Node, A, DW, DWU),
+ Skeleton(nullptr), LabelBegin(nullptr), BaseAddress(nullptr) {
insertDIE(Node, &getUnitDie());
}
addUInt(*Loc, dwarf::DW_FORM_udata,
DD->getAddressPool().getIndex(Sym, /* TLS */ true));
}
- // 3) followed by a custom OP to make the debugger do a TLS lookup.
- addUInt(*Loc, dwarf::DW_FORM_data1, dwarf::DW_OP_GNU_push_tls_address);
+ // 3) followed by an OP to make the debugger do a TLS lookup.
+ addUInt(*Loc, dwarf::DW_FORM_data1,
+ DD->useGNUTLSOpcode() ? dwarf::DW_OP_GNU_push_tls_address
+ : dwarf::DW_OP_form_tls_address);
} else {
DD->addArangeLabel(SymbolCU(this, Sym));
addOpAddress(*Loc, Sym);
// and DW_AT_high_pc attributes. If there are global variables in this
// scope then create and insert DIEs for these variables.
DIE &DwarfCompileUnit::updateSubprogramScopeDIE(DISubprogram SP) {
- DIE *SPDie = getOrCreateSubprogramDIE(SP);
+ DIE *SPDie = getOrCreateSubprogramDIE(SP, includeMinimalInlineScopes());
attachLowHighPC(*SPDie, DD->getFunctionBeginSym(), DD->getFunctionEndSym());
if (!DD->getCurrentFunction()->getTarget().Options.DisableFramePointerElim(
addFlag(*SPDie, dwarf::DW_AT_APPLE_omit_frame_ptr);
// Only include DW_AT_frame_base in full debug info
- if (getCUNode().getEmissionKind() != DIBuilder::LineTablesOnly) {
- const TargetRegisterInfo *RI =
- Asm->TM.getSubtargetImpl()->getRegisterInfo();
+ if (!includeMinimalInlineScopes()) {
+ const TargetRegisterInfo *RI = Asm->MF->getSubtarget().getRegisterInfo();
MachineLocation Location(RI->getFrameRegister(*Asm->MF));
- addAddress(*SPDie, dwarf::DW_AT_frame_base, Location);
+ if (RI->isPhysicalRegister(Location.getReg()))
+ addAddress(*SPDie, dwarf::DW_AT_frame_base, Location);
}
// Add name to the name table, we do this here because we're guaranteed
// null and the children will be added to the scope DIE.
createScopeChildrenDIE(Scope, Children, &ChildScopeCount);
- // There is no need to emit empty lexical block DIE.
- for (const auto &E : DD->findImportedEntitiesForScope(DS))
- Children.push_back(
- constructImportedEntityDIE(DIImportedEntity(E.second)));
+ // Skip imported directives in gmlt-like data.
+ if (!includeMinimalInlineScopes()) {
+ // There is no need to emit empty lexical block DIE.
+ for (const auto &E : DD->findImportedEntitiesForScope(DS))
+ Children.push_back(
+ constructImportedEntityDIE(DIImportedEntity(E.second)));
+ }
+
// If there are only other scopes as children, put them directly in the
// parent instead, as this scope would serve no purpose.
if (Children.size() == ChildScopeCount) {
Value);
}
-void
-DwarfCompileUnit::addScopeRangeList(DIE &ScopeDIE,
- const SmallVectorImpl<InsnRange> &Range) {
+void DwarfCompileUnit::addScopeRangeList(DIE &ScopeDIE,
+ SmallVector<RangeSpan, 2> Range) {
// Emit offset in .debug_range as a relocatable label. emitDIE will handle
// emitting it appropriately.
- MCSymbol *RangeSym =
- Asm->GetTempSymbol("debug_ranges", DD->getNextRangeNumber());
-
auto *RangeSectionSym = DD->getRangeSectionSym();
+ RangeSpanList List(
+ Asm->GetTempSymbol("debug_ranges", DD->getNextRangeNumber()),
+ std::move(Range));
+
// Under fission, ranges are specified by constant offsets relative to the
// CU's DW_AT_GNU_ranges_base.
- if (DD->useSplitDwarf())
- addSectionDelta(ScopeDIE, dwarf::DW_AT_ranges, RangeSym, RangeSectionSym);
+ if (isDwoUnit())
+ addSectionDelta(ScopeDIE, dwarf::DW_AT_ranges, List.getSym(),
+ RangeSectionSym);
else
- addSectionLabel(ScopeDIE, dwarf::DW_AT_ranges, RangeSym, RangeSectionSym);
-
- RangeSpanList List(RangeSym);
- for (const InsnRange &R : Range)
- List.addRange(RangeSpan(DD->getLabelBeforeInsn(R.first),
- DD->getLabelAfterInsn(R.second)));
+ addSectionLabel(ScopeDIE, dwarf::DW_AT_ranges, List.getSym(),
+ RangeSectionSym);
// Add the range list to the set of ranges to be emitted.
- addRangeList(std::move(List));
+ (Skeleton ? Skeleton : this)->CURangeLists.push_back(std::move(List));
+}
+
+void DwarfCompileUnit::attachRangesOrLowHighPC(
+ DIE &Die, SmallVector<RangeSpan, 2> Ranges) {
+ if (Ranges.size() == 1) {
+ const auto &single = Ranges.front();
+ attachLowHighPC(Die, single.getStart(), single.getEnd());
+ } else
+ addScopeRangeList(Die, std::move(Ranges));
}
void DwarfCompileUnit::attachRangesOrLowHighPC(
DIE &Die, const SmallVectorImpl<InsnRange> &Ranges) {
- assert(!Ranges.empty());
- if (Ranges.size() == 1)
- attachLowHighPC(Die, DD->getLabelBeforeInsn(Ranges.front().first),
- DD->getLabelAfterInsn(Ranges.front().second));
- else
- addScopeRangeList(Die, Ranges);
+ SmallVector<RangeSpan, 2> List;
+ List.reserve(Ranges.size());
+ for (const InsnRange &R : Ranges)
+ List.push_back(RangeSpan(DD->getLabelBeforeInsn(R.first),
+ DD->getLabelAfterInsn(R.second)));
+ attachRangesOrLowHighPC(Die, std::move(List));
}
// This scope represents inlined body of a function. Construct DIE to
}
// .. else use frame index.
- int FI = DV.getFrameIndex();
- if (FI != ~0) {
+ if (DV.getFrameIndex().back() == ~0)
+ return VariableDie;
+
+ auto Expr = DV.getExpression().begin();
+ DIELoc *Loc = new (DIEValueAllocator) DIELoc();
+ DIEDwarfExpression DwarfExpr(*Asm, *this, *Loc);
+ for (auto FI : DV.getFrameIndex()) {
unsigned FrameReg = 0;
- const TargetFrameLowering *TFI =
- Asm->TM.getSubtargetImpl()->getFrameLowering();
+ const TargetFrameLowering *TFI = Asm->MF->getSubtarget().getFrameLowering();
int Offset = TFI->getFrameIndexReference(*Asm->MF, FI, FrameReg);
- MachineLocation Location(FrameReg, Offset);
- addVariableAddress(DV, *VariableDie, Location);
+ assert(Expr != DV.getExpression().end() &&
+ "Wrong number of expressions");
+ DwarfExpr.AddMachineRegIndirect(FrameReg, Offset);
+ DwarfExpr.AddExpression(Expr->begin(), Expr->end());
+ ++Expr;
}
+ addBlock(*VariableDie, dwarf::DW_AT_location, Loc);
return VariableDie;
}
// If we have more than one elements and the last one is null, it is a
// variadic function.
if (FnArgs.getNumElements() > 1 &&
- !FnArgs.getElement(FnArgs.getNumElements() - 1))
+ !FnArgs.getElement(FnArgs.getNumElements() - 1) &&
+ !includeMinimalInlineScopes())
ScopeDIE.addChild(make_unique<DIE>(dwarf::DW_TAG_unspecified_parameters));
}
DIE *ContextDIE;
+ if (includeMinimalInlineScopes())
+ ContextDIE = &getUnitDie();
// Some of this is duplicated from DwarfUnit::getOrCreateSubprogramDIE, with
// the important distinction that the DIDescriptor is not associated with the
// DIE (since the DIDescriptor will be associated with the concrete DIE, if
// any). It could be refactored to some common utility function.
- if (DISubprogram SPDecl = SP.getFunctionDeclaration()) {
+ else if (DISubprogram SPDecl = SP.getFunctionDeclaration()) {
ContextDIE = &getUnitDie();
getOrCreateSubprogramDIE(SPDecl);
} else
&createAndAddDIE(dwarf::DW_TAG_subprogram, *ContextDIE, DIDescriptor());
applySubprogramAttributesToDefinition(SP, *AbsDef);
- if (getCUNode().getEmissionKind() != DIBuilder::LineTablesOnly)
+ if (!includeMinimalInlineScopes())
addUInt(*AbsDef, dwarf::DW_AT_inline, None, dwarf::DW_INL_inlined);
if (DIE *ObjectPointer = createAndAddScopeChildren(Scope, *AbsDef))
addDIEEntry(*AbsDef, dwarf::DW_AT_object_pointer, *ObjectPointer);
EntityDie = getOrCreateSubprogramDIE(DISubprogram(Entity));
else if (Entity.isType())
EntityDie = getOrCreateTypeDIE(DIType(Entity));
+ else if (Entity.isGlobalVariable())
+ EntityDie = getOrCreateGlobalVariableDIE(DIGlobalVariable(Entity));
else
EntityDie = getDIE(Entity);
assert(EntityDie);
// If this subprogram has an abstract definition, reference that
addDIEEntry(*D, dwarf::DW_AT_abstract_origin, *AbsSPDIE);
} else {
- if (!D && getCUNode().getEmissionKind() != DIBuilder::LineTablesOnly)
+ if (!D && !includeMinimalInlineScopes())
// Lazily construct the subprogram if we didn't see either concrete or
// inlined versions during codegen. (except in -gmlt ^ where we want
// to omit these entirely)
for (unsigned vi = 0, ve = Variables.getNumElements(); vi != ve; ++vi) {
DIVariable DV(Variables.getElement(vi));
assert(DV.isVariable());
- DbgVariable NewVar(DV, DIExpression(nullptr), DD);
+ DbgVariable NewVar(DV, DIExpression(), DD);
auto VariableDie = constructVariableDIE(NewVar);
applyVariableAttributes(NewVar, *VariableDie);
SPDIE->addChild(std::move(VariableDie));
}
}
+void DwarfCompileUnit::emitHeader(const MCSymbol *ASectionSym) const {
+ // Don't bother labeling the .dwo unit, as its offset isn't used.
+ if (!Skeleton)
+ Asm->OutStreamer.EmitLabel(LabelBegin);
+
+ DwarfUnit::emitHeader(ASectionSym);
+}
+
+/// addGlobalName - Add a new global name to the compile unit.
+void DwarfCompileUnit::addGlobalName(StringRef Name, DIE &Die,
+ DIScope Context) {
+ if (includeMinimalInlineScopes())
+ return;
+ std::string FullName = getParentContextString(Context) + Name.str();
+ GlobalNames[FullName] = &Die;
+}
+
+/// Add a new global type to the unit.
+void DwarfCompileUnit::addGlobalType(DIType Ty, const DIE &Die,
+ DIScope Context) {
+ if (includeMinimalInlineScopes())
+ return;
+ std::string FullName = getParentContextString(Context) + Ty.getName().str();
+ GlobalTypes[FullName] = &Die;
+}
+
+/// addVariableAddress - Add DW_AT_location attribute for a
+/// DbgVariable based on provided MachineLocation.
+void DwarfCompileUnit::addVariableAddress(const DbgVariable &DV, DIE &Die,
+ MachineLocation Location) {
+ if (DV.variableHasComplexAddress())
+ addComplexAddress(DV, Die, dwarf::DW_AT_location, Location);
+ else if (DV.isBlockByrefVariable())
+ addBlockByrefAddress(DV, Die, dwarf::DW_AT_location, Location);
+ else
+ addAddress(Die, dwarf::DW_AT_location, Location);
+}
+
+/// Add an address attribute to a die based on the location provided.
+void DwarfCompileUnit::addAddress(DIE &Die, dwarf::Attribute Attribute,
+ const MachineLocation &Location) {
+ DIELoc *Loc = new (DIEValueAllocator) DIELoc();
+
+ bool validReg;
+ if (Location.isReg())
+ validReg = addRegisterOpPiece(*Loc, Location.getReg());
+ else
+ validReg = addRegisterOffset(*Loc, Location.getReg(), Location.getOffset());
+
+ if (!validReg)
+ return;
+
+ // Now attach the location information to the DIE.
+ addBlock(Die, Attribute, Loc);
+}
+
+/// Start with the address based on the location provided, and generate the
+/// DWARF information necessary to find the actual variable given the extra
+/// address information encoded in the DbgVariable, starting from the starting
+/// location. Add the DWARF information to the die.
+void DwarfCompileUnit::addComplexAddress(const DbgVariable &DV, DIE &Die,
+ dwarf::Attribute Attribute,
+ const MachineLocation &Location) {
+ DIELoc *Loc = new (DIEValueAllocator) DIELoc();
+ DIEDwarfExpression DwarfExpr(*Asm, *this, *Loc);
+ assert(DV.getExpression().size() == 1);
+ DIExpression Expr = DV.getExpression().back();
+ bool ValidReg;
+ if (Location.getOffset()) {
+ ValidReg = DwarfExpr.AddMachineRegIndirect(Location.getReg(),
+ Location.getOffset());
+ if (ValidReg)
+ DwarfExpr.AddExpression(Expr.begin(), Expr.end());
+ } else
+ ValidReg = DwarfExpr.AddMachineRegExpression(Expr, Location.getReg());
+
+ // Now attach the location information to the DIE.
+ if (ValidReg)
+ addBlock(Die, Attribute, Loc);
+}
+
+/// Add a Dwarf loclistptr attribute data and value.
+void DwarfCompileUnit::addLocationList(DIE &Die, dwarf::Attribute Attribute,
+ unsigned Index) {
+ DIEValue *Value = new (DIEValueAllocator) DIELocList(Index);
+ dwarf::Form Form = DD->getDwarfVersion() >= 4 ? dwarf::DW_FORM_sec_offset
+ : dwarf::DW_FORM_data4;
+ Die.addValue(Attribute, Form, Value);
+}
+
+void DwarfCompileUnit::applyVariableAttributes(const DbgVariable &Var,
+ DIE &VariableDie) {
+ StringRef Name = Var.getName();
+ if (!Name.empty())
+ addString(VariableDie, dwarf::DW_AT_name, Name);
+ addSourceLine(VariableDie, Var.getVariable());
+ addType(VariableDie, Var.getType());
+ if (Var.isArtificial())
+ addFlag(VariableDie, dwarf::DW_AT_artificial);
+}
+
+/// Add a Dwarf expression attribute data and value.
+void DwarfCompileUnit::addExpr(DIELoc &Die, dwarf::Form Form,
+ const MCExpr *Expr) {
+ DIEValue *Value = new (DIEValueAllocator) DIEExpr(Expr);
+ Die.addValue((dwarf::Attribute)0, Form, Value);
+}
+
+void DwarfCompileUnit::applySubprogramAttributesToDefinition(DISubprogram SP,
+ DIE &SPDie) {
+ DISubprogram SPDecl = SP.getFunctionDeclaration();
+ DIScope Context = resolve(SPDecl ? SPDecl.getContext() : SP.getContext());
+ applySubprogramAttributes(SP, SPDie, includeMinimalInlineScopes());
+ addGlobalName(SP.getName(), SPDie, Context);
+}
+
+bool DwarfCompileUnit::isDwoUnit() const {
+ return DD->useSplitDwarf() && Skeleton;
+}
+
+bool DwarfCompileUnit::includeMinimalInlineScopes() const {
+ return getCUNode().getEmissionKind() == DIBuilder::LineTablesOnly ||
+ (DD->useSplitDwarf() && !Skeleton);
+}
} // end llvm namespace
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