//===----------------------------------------------------------------------===//
#include "DwarfFile.h"
-
#include "DwarfDebug.h"
#include "DwarfUnit.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/IR/DataLayout.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/Support/LEB128.h"
-#include "llvm/IR/DataLayout.h"
-#include "llvm/ADT/STLExtras.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
namespace llvm {
-DwarfFile::DwarfFile(AsmPrinter *AP, DwarfDebug &DD, StringRef Pref,
- BumpPtrAllocator &DA)
- : Asm(AP), DD(DD), StrPool(DA, *Asm, Pref) {
- (void)this->DD;
-}
+DwarfFile::DwarfFile(AsmPrinter *AP, StringRef Pref, BumpPtrAllocator &DA)
+ : Asm(AP), StrPool(DA, *Asm, Pref) {}
-DwarfFile::~DwarfFile() {}
+DwarfFile::~DwarfFile() {
+ for (DIEAbbrev *Abbrev : Abbreviations)
+ Abbrev->~DIEAbbrev();
+}
// Define a unique number for the abbreviation.
//
-void DwarfFile::assignAbbrevNumber(DIEAbbrev &Abbrev) {
- // Check the set for priors.
- DIEAbbrev *InSet = AbbreviationsSet.GetOrInsertNode(&Abbrev);
-
- // If it's newly added.
- if (InSet == &Abbrev) {
- // Add to abbreviation list.
- Abbreviations.push_back(&Abbrev);
-
- // Assign the vector position + 1 as its number.
- Abbrev.setNumber(Abbreviations.size());
- } else {
- // Assign existing abbreviation number.
- Abbrev.setNumber(InSet->getNumber());
+DIEAbbrev &DwarfFile::assignAbbrevNumber(DIE &Die) {
+ FoldingSetNodeID ID;
+ DIEAbbrev Abbrev = Die.generateAbbrev();
+ Abbrev.Profile(ID);
+
+ void *InsertPos;
+ if (DIEAbbrev *Existing =
+ AbbreviationsSet.FindNodeOrInsertPos(ID, InsertPos)) {
+ Die.setAbbrevNumber(Existing->getNumber());
+ return *Existing;
}
+
+ // Move the abbreviation to the heap and assign a number.
+ DIEAbbrev *New = new (AbbrevAllocator) DIEAbbrev(std::move(Abbrev));
+ Abbreviations.push_back(New);
+ New->setNumber(Abbreviations.size());
+ Die.setAbbrevNumber(Abbreviations.size());
+
+ // Store it for lookup.
+ AbbreviationsSet.InsertNode(New, InsertPos);
+ return *New;
}
void DwarfFile::addUnit(std::unique_ptr<DwarfUnit> U) {
// Emit the various dwarf units to the unit section USection with
// the abbreviations going into ASection.
-void DwarfFile::emitUnits(const MCSymbol *ASectionSym) {
+void DwarfFile::emitUnits(bool UseOffsets) {
for (const auto &TheU : CUs) {
DIE &Die = TheU->getUnitDie();
- const MCSection *USection = TheU->getSection();
- Asm->OutStreamer.SwitchSection(USection);
-
- // Emit the compile units header.
- Asm->OutStreamer.EmitLabel(TheU->getLabelBegin());
-
- // Emit size of content not including length itself
- Asm->OutStreamer.AddComment("Length of Unit");
- Asm->EmitInt32(TheU->getHeaderSize() + Die.getSize());
+ MCSection *USection = TheU->getSection();
+ Asm->OutStreamer->SwitchSection(USection);
- TheU->emitHeader(ASectionSym);
+ TheU->emitHeader(UseOffsets);
- DD.emitDIE(Die);
- Asm->OutStreamer.EmitLabel(TheU->getLabelEnd());
+ Asm->emitDwarfDIE(Die);
}
}
// CU. It returns the offset after laying out the DIE.
unsigned DwarfFile::computeSizeAndOffset(DIE &Die, unsigned Offset) {
// Record the abbreviation.
- assignAbbrevNumber(Die.getAbbrev());
-
- // Get the abbreviation for this DIE.
- const DIEAbbrev &Abbrev = Die.getAbbrev();
+ const DIEAbbrev &Abbrev = assignAbbrevNumber(Die);
// Set DIE offset
Die.setOffset(Offset);
// Start the size with the size of abbreviation code.
Offset += getULEB128Size(Die.getAbbrevNumber());
- const SmallVectorImpl<DIEValue *> &Values = Die.getValues();
- const SmallVectorImpl<DIEAbbrevData> &AbbrevData = Abbrev.getData();
-
// Size the DIE attribute values.
- for (unsigned i = 0, N = Values.size(); i < N; ++i)
+ for (const auto &V : Die.values())
// Size attribute value.
- Offset += Values[i]->SizeOf(Asm, AbbrevData[i].getForm());
-
- // Get the children.
- const auto &Children = Die.getChildren();
+ Offset += V.SizeOf(Asm);
// Size the DIE children if any.
- if (!Children.empty()) {
+ if (Die.hasChildren()) {
+ (void)Abbrev;
assert(Abbrev.hasChildren() && "Children flag not set");
- for (auto &Child : Children)
- Offset = computeSizeAndOffset(*Child, Offset);
+ for (auto &Child : Die.children())
+ Offset = computeSizeAndOffset(Child, Offset);
// End of children marker.
Offset += sizeof(int8_t);
Die.setSize(Offset - Die.getOffset());
return Offset;
}
-void DwarfFile::emitAbbrevs(const MCSection *Section) {
+
+void DwarfFile::emitAbbrevs(MCSection *Section) {
// Check to see if it is worth the effort.
if (!Abbreviations.empty()) {
// Start the debug abbrev section.
- Asm->OutStreamer.SwitchSection(Section);
-
- // For each abbrevation.
- for (const DIEAbbrev *Abbrev : Abbreviations) {
- // Emit the abbrevations code (base 1 index.)
- Asm->EmitULEB128(Abbrev->getNumber(), "Abbreviation Code");
-
- // Emit the abbreviations data.
- Abbrev->Emit(Asm);
- }
-
- // Mark end of abbreviations.
- Asm->EmitULEB128(0, "EOM(3)");
+ Asm->OutStreamer->SwitchSection(Section);
+ Asm->emitDwarfAbbrevs(Abbreviations);
}
}
// Emit strings into a string section.
-void DwarfFile::emitStrings(const MCSection *StrSection,
- const MCSection *OffsetSection) {
+void DwarfFile::emitStrings(MCSection *StrSection, MCSection *OffsetSection) {
StrPool.emit(*Asm, StrSection, OffsetSection);
}
-// If Var is a current function argument then add it to CurrentFnArguments list.
-bool DwarfFile::addCurrentFnArgument(DbgVariable *Var, LexicalScope *Scope) {
- if (Scope->getParent())
- return false;
- DIVariable DV = Var->getVariable();
- if (DV.getTag() != dwarf::DW_TAG_arg_variable)
- return false;
- unsigned ArgNo = DV.getArgNumber();
- if (ArgNo == 0)
- return false;
-
- auto &CurrentFnArguments = DD.getCurrentFnArguments();
-
- // llvm::Function argument size is not good indicator of how many
- // arguments does the function have at source level.
- if (ArgNo > CurrentFnArguments.size())
- CurrentFnArguments.resize(ArgNo * 2);
- assert(!CurrentFnArguments[ArgNo - 1]);
- CurrentFnArguments[ArgNo - 1] = Var;
+bool DwarfFile::addScopeVariable(LexicalScope *LS, DbgVariable *Var) {
+ SmallVectorImpl<DbgVariable *> &Vars = ScopeVariables[LS];
+ const DILocalVariable *DV = Var->getVariable();
+ // Variables with positive arg numbers are parameters.
+ if (unsigned ArgNum = DV->getArg()) {
+ // Keep all parameters in order at the start of the variable list to ensure
+ // function types are correct (no out-of-order parameters)
+ //
+ // This could be improved by only doing it for optimized builds (unoptimized
+ // builds have the right order to begin with), searching from the back (this
+ // would catch the unoptimized case quickly), or doing a binary search
+ // rather than linear search.
+ auto I = Vars.begin();
+ while (I != Vars.end()) {
+ unsigned CurNum = (*I)->getVariable()->getArg();
+ // A local (non-parameter) variable has been found, insert immediately
+ // before it.
+ if (CurNum == 0)
+ break;
+ // A later indexed parameter has been found, insert immediately before it.
+ if (CurNum > ArgNum)
+ break;
+ if (CurNum == ArgNum) {
+ (*I)->addMMIEntry(*Var);
+ return false;
+ }
+ ++I;
+ }
+ Vars.insert(I, Var);
+ return true;
+ }
+
+ Vars.push_back(Var);
return true;
}
}
projects / oota-llvm.git / blobdiff