//===----------------------------------------------------------------------===//
#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, const char *Pref, BumpPtrAllocator &DA)
- : Asm(AP), StringPool(DA), NextStringPoolNumber(0), StringPref(Pref) {}
-
-DwarfFile::~DwarfFile() {
-}
-
-MCSymbol *DwarfFile::getStringPoolSym() {
- return Asm->GetTempSymbol(StringPref);
-}
-
-MCSymbol *DwarfFile::getStringPoolEntry(StringRef Str) {
- std::pair<MCSymbol *, unsigned> &Entry =
- StringPool.GetOrCreateValue(Str).getValue();
- if (Entry.first)
- return Entry.first;
+DwarfFile::DwarfFile(AsmPrinter *AP, StringRef Pref, BumpPtrAllocator &DA)
+ : Asm(AP), StrPool(DA, *Asm, Pref) {}
- Entry.second = NextStringPoolNumber++;
- return Entry.first = Asm->GetTempSymbol(StringPref, Entry.second);
-}
-
-unsigned DwarfFile::getStringPoolIndex(StringRef Str) {
- std::pair<MCSymbol *, unsigned> &Entry =
- StringPool.GetOrCreateValue(Str).getValue();
- if (Entry.first)
- return Entry.second;
-
- Entry.second = NextStringPoolNumber++;
- Entry.first = Asm->GetTempSymbol(StringPref, Entry.second);
- return Entry.second;
-}
-
-unsigned DwarfFile::getAddrPoolIndex(const MCSymbol *Sym, bool TLS) {
- std::pair<AddrPool::iterator, bool> P = AddressPool.insert(
- std::make_pair(Sym, AddressPoolEntry(AddressPool.size(), TLS)));
- return P.first->second.Number;
-}
+DwarfFile::~DwarfFile() {}
// Define a unique number for the abbreviation.
//
// Emit the various dwarf units to the unit section USection with
// the abbreviations going into ASection.
-void DwarfFile::emitUnits(DwarfDebug *DD, 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());
+ DIE &Die = TheU->getUnitDie();
+ 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);
}
}
+
// Compute the size and offset for each DIE.
void DwarfFile::computeSizeAndOffsets() {
// Offset from the first CU in the debug info section is 0 initially.
// EndOffset here is CU-relative, after laying out
// all of the CU DIE.
- unsigned EndOffset = computeSizeAndOffset(*TheU->getUnitDie(), Offset);
+ unsigned EndOffset = computeSizeAndOffset(TheU->getUnitDie(), Offset);
SecOffset += EndOffset;
}
}
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,
- const MCSymbol *StrSecSym) {
-
- if (StringPool.empty())
- return;
-
- // Start the dwarf str section.
- Asm->OutStreamer.SwitchSection(StrSection);
-
- // Get all of the string pool entries and put them in an array by their ID so
- // we can sort them.
- SmallVector<std::pair<unsigned, const StrPool::value_type *>, 64 > Entries;
-
- for (const auto &I : StringPool)
- Entries.push_back(std::make_pair(I.second.second, &I));
-
- array_pod_sort(Entries.begin(), Entries.end());
-
- for (const auto &Entry : Entries) {
- // Emit a label for reference from debug information entries.
- Asm->OutStreamer.EmitLabel(Entry.second->getValue().first);
-
- // Emit the string itself with a terminating null byte.
- Asm->OutStreamer.EmitBytes(StringRef(Entry.second->getKeyData(),
- Entry.second->getKeyLength() + 1));
- }
+void DwarfFile::emitStrings(MCSection *StrSection, MCSection *OffsetSection) {
+ StrPool.emit(*Asm, StrSection, OffsetSection);
+}
- // If we've got an offset section go ahead and emit that now as well.
- if (OffsetSection) {
- Asm->OutStreamer.SwitchSection(OffsetSection);
- unsigned offset = 0;
- unsigned size = 4; // FIXME: DWARF64 is 8.
- for (const auto &Entry : Entries) {
- Asm->OutStreamer.EmitIntValue(offset, size);
- offset += Entry.second->getKeyLength() + 1;
+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;
}
-}
-
-// Emit addresses into the section given.
-void DwarfFile::emitAddresses(const MCSection *AddrSection) {
-
- if (AddressPool.empty())
- return;
-
- // Start the dwarf addr section.
- Asm->OutStreamer.SwitchSection(AddrSection);
-
- // Order the address pool entries by ID
- SmallVector<const MCExpr *, 64> Entries(AddressPool.size());
-
- for (const auto &I : AddressPool)
- Entries[I.second.Number] =
- I.second.TLS
- ? Asm->getObjFileLowering().getDebugThreadLocalSymbol(I.first)
- : MCSymbolRefExpr::Create(I.first, Asm->OutContext);
- for (const MCExpr *Entry : Entries)
- Asm->OutStreamer.EmitValue(Entry, Asm->getDataLayout().getPointerSize());
+ Vars.push_back(Var);
+ return true;
}
}
projects / oota-llvm.git / blobdiff