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-rw-r--r--tools/dsymutil/DwarfLinker.cpp115
1 files changed, 54 insertions, 61 deletions
diff --git a/tools/dsymutil/DwarfLinker.cpp b/tools/dsymutil/DwarfLinker.cpp
index 052c1daadbdad..6e9087c70ecad 100644
--- a/tools/dsymutil/DwarfLinker.cpp
+++ b/tools/dsymutil/DwarfLinker.cpp
@@ -60,33 +60,23 @@ using HalfOpenIntervalMap =
typedef HalfOpenIntervalMap<uint64_t, int64_t> FunctionIntervals;
-// FIXME: Delete this structure once DIE::Values has a stable iterator we can
-// use instead.
+// FIXME: Delete this structure.
struct PatchLocation {
- DIE *Die;
- unsigned Index;
+ DIE::value_iterator I;
- PatchLocation() : Die(nullptr), Index(0) {}
- PatchLocation(DIE &Die, unsigned Index) : Die(&Die), Index(Index) {}
- PatchLocation(DIE &Die)
- : Die(&Die), Index(std::distance(Die.values_begin(), Die.values_end())) {}
+ PatchLocation() = default;
+ PatchLocation(DIE::value_iterator I) : I(I) {}
void set(uint64_t New) const {
- assert(Die);
- assert((signed)Index <
- std::distance(Die->values_begin(), Die->values_end()));
- const auto &Old = Die->values_begin()[Index];
+ assert(I);
+ const auto &Old = *I;
assert(Old.getType() == DIEValue::isInteger);
- Die->setValue(Index,
- DIEValue(Old.getAttribute(), Old.getForm(), DIEInteger(New)));
+ *I = DIEValue(Old.getAttribute(), Old.getForm(), DIEInteger(New));
}
uint64_t get() const {
- assert(Die);
- assert((signed)Index <
- std::distance(Die->values_begin(), Die->values_end()));
- assert(Die->values_begin()[Index].getType() == DIEValue::isInteger);
- return Die->values_begin()[Index].getDIEInteger().getValue();
+ assert(I);
+ return I->getDIEInteger().getValue();
}
};
@@ -123,8 +113,8 @@ public:
unsigned getUniqueID() const { return ID; }
- DIE *getOutputUnitDIE() const { return CUDie.get(); }
- void setOutputUnitDIE(DIE *Die) { CUDie.reset(Die); }
+ DIE *getOutputUnitDIE() const { return CUDie; }
+ void setOutputUnitDIE(DIE *Die) { CUDie = Die; }
DIEInfo &getInfo(unsigned Idx) { return Info[Idx]; }
const DIEInfo &getInfo(unsigned Idx) const { return Info[Idx]; }
@@ -204,7 +194,7 @@ private:
DWARFUnit &OrigUnit;
unsigned ID;
std::vector<DIEInfo> Info; ///< DIE info indexed by DIE index.
- std::unique_ptr<DIE> CUDie; ///< Root of the linked DIE tree.
+ DIE *CUDie; ///< Root of the linked DIE tree.
uint64_t StartOffset;
uint64_t NextUnitOffset;
@@ -1437,10 +1427,10 @@ void DwarfLinker::endDebugObject() {
ValidRelocs.clear();
Ranges.clear();
- for (auto *Block : DIEBlocks)
- Block->~DIEBlock();
- for (auto *Loc : DIELocs)
- Loc->~DIELoc();
+ for (auto I = DIEBlocks.begin(), E = DIEBlocks.end(); I != E; ++I)
+ (*I)->~DIEBlock();
+ for (auto I = DIELocs.begin(), E = DIELocs.end(); I != E; ++I)
+ (*I)->~DIELoc();
DIEBlocks.clear();
DIELocs.clear();
@@ -1461,8 +1451,8 @@ void DwarfLinker::findValidRelocsMachO(const object::SectionRef &Section,
object::DataRefImpl RelocDataRef = Reloc.getRawDataRefImpl();
MachO::any_relocation_info MachOReloc = Obj.getRelocation(RelocDataRef);
unsigned RelocSize = 1 << Obj.getAnyRelocationLength(MachOReloc);
- uint64_t Offset64;
- if ((RelocSize != 4 && RelocSize != 8) || Reloc.getOffset(Offset64)) {
+ uint64_t Offset64 = Reloc.getOffset();
+ if ((RelocSize != 4 && RelocSize != 8)) {
reportWarning(" unsupported relocation in debug_info section.");
continue;
}
@@ -1472,12 +1462,12 @@ void DwarfLinker::findValidRelocsMachO(const object::SectionRef &Section,
auto Sym = Reloc.getSymbol();
if (Sym != Obj.symbol_end()) {
- StringRef SymbolName;
- if (Sym->getName(SymbolName)) {
+ ErrorOr<StringRef> SymbolName = Sym->getName();
+ if (!SymbolName) {
reportWarning("error getting relocation symbol name.");
continue;
}
- if (const auto *Mapping = DMO.lookupSymbol(SymbolName))
+ if (const auto *Mapping = DMO.lookupSymbol(*SymbolName))
ValidRelocs.emplace_back(Offset64, RelocSize, Addend, Mapping);
} else if (const auto *Mapping = DMO.lookupObjectAddress(Addend)) {
// Do not store the addend. The addend was the address of the
@@ -1837,7 +1827,7 @@ unsigned DwarfLinker::cloneStringAttribute(DIE &Die, AttributeSpec AttrSpec,
// Switch everything to out of line strings.
const char *String = *Val.getAsCString(&U);
unsigned Offset = StringPool.getStringOffset(String);
- Die.addValue(dwarf::Attribute(AttrSpec.Attr), dwarf::DW_FORM_strp,
+ Die.addValue(DIEAlloc, dwarf::Attribute(AttrSpec.Attr), dwarf::DW_FORM_strp,
DIEInteger(Offset));
return 4;
}
@@ -1871,7 +1861,7 @@ unsigned DwarfLinker::cloneDieReferenceAttribute(
assert(Ref > InputDIE.getOffset());
// We haven't cloned this DIE yet. Just create an empty one and
// store it. It'll get really cloned when we process it.
- RefInfo.Clone = new DIE(dwarf::Tag(RefDie->getTag()));
+ RefInfo.Clone = DIE::get(DIEAlloc, dwarf::Tag(RefDie->getTag()));
}
NewRefDie = RefInfo.Clone;
@@ -1887,18 +1877,21 @@ unsigned DwarfLinker::cloneDieReferenceAttribute(
uint32_t NewRefOffset =
RefUnit->getStartOffset() + NewRefDie->getOffset();
Attr = NewRefOffset;
+ Die.addValue(DIEAlloc, dwarf::Attribute(AttrSpec.Attr),
+ dwarf::DW_FORM_ref_addr, DIEInteger(Attr));
} else {
// A forward reference. Note and fixup later.
Attr = 0xBADDEF;
- Unit.noteForwardReference(NewRefDie, RefUnit, PatchLocation(Die));
+ Unit.noteForwardReference(
+ NewRefDie, RefUnit,
+ Die.addValue(DIEAlloc, dwarf::Attribute(AttrSpec.Attr),
+ dwarf::DW_FORM_ref_addr, DIEInteger(Attr)));
}
- Die.addValue(dwarf::Attribute(AttrSpec.Attr), dwarf::DW_FORM_ref_addr,
- DIEInteger(Attr));
return AttrSize;
}
- Die.addValue(dwarf::Attribute(AttrSpec.Attr), dwarf::Form(AttrSpec.Form),
- DIEEntry(*NewRefDie));
+ Die.addValue(DIEAlloc, dwarf::Attribute(AttrSpec.Attr),
+ dwarf::Form(AttrSpec.Form), DIEEntry(*NewRefDie));
return AttrSize;
}
@@ -1930,8 +1923,8 @@ unsigned DwarfLinker::cloneBlockAttribute(DIE &Die, AttributeSpec AttrSpec,
dwarf::Form(AttrSpec.Form), Block);
ArrayRef<uint8_t> Bytes = *Val.getAsBlock();
for (auto Byte : Bytes)
- Attr->addValue(static_cast<dwarf::Attribute>(0), dwarf::DW_FORM_data1,
- DIEInteger(Byte));
+ Attr->addValue(DIEAlloc, static_cast<dwarf::Attribute>(0),
+ dwarf::DW_FORM_data1, DIEInteger(Byte));
// FIXME: If DIEBlock and DIELoc just reuses the Size field of
// the DIE class, this if could be replaced by
// Attr->setSize(Bytes.size()).
@@ -1941,7 +1934,7 @@ unsigned DwarfLinker::cloneBlockAttribute(DIE &Die, AttributeSpec AttrSpec,
else
Block->ComputeSize(&Streamer->getAsmPrinter());
}
- Die.addValue(Value);
+ Die.addValue(DIEAlloc, Value);
return AttrSize;
}
@@ -1975,7 +1968,7 @@ unsigned DwarfLinker::cloneAddressAttribute(DIE &Die, AttributeSpec AttrSpec,
Addr = (Info.OrigHighPc ? Info.OrigHighPc : Addr) + Info.PCOffset;
}
- Die.addValue(static_cast<dwarf::Attribute>(AttrSpec.Attr),
+ Die.addValue(DIEAlloc, static_cast<dwarf::Attribute>(AttrSpec.Attr),
static_cast<dwarf::Form>(AttrSpec.Form), DIEInteger(Addr));
return Unit.getOrigUnit().getAddressByteSize();
}
@@ -2004,20 +1997,20 @@ unsigned DwarfLinker::cloneScalarAttribute(
&Unit.getOrigUnit(), &InputDIE);
return 0;
}
- DIEInteger Attr(Value);
+ PatchLocation Patch =
+ Die.addValue(DIEAlloc, dwarf::Attribute(AttrSpec.Attr),
+ dwarf::Form(AttrSpec.Form), DIEInteger(Value));
if (AttrSpec.Attr == dwarf::DW_AT_ranges)
- Unit.noteRangeAttribute(Die, PatchLocation(Die));
+ Unit.noteRangeAttribute(Die, Patch);
// A more generic way to check for location attributes would be
// nice, but it's very unlikely that any other attribute needs a
// location list.
else if (AttrSpec.Attr == dwarf::DW_AT_location ||
AttrSpec.Attr == dwarf::DW_AT_frame_base)
- Unit.noteLocationAttribute(PatchLocation(Die), Info.PCOffset);
+ Unit.noteLocationAttribute(Patch, Info.PCOffset);
else if (AttrSpec.Attr == dwarf::DW_AT_declaration && Value)
Info.IsDeclaration = true;
- Die.addValue(dwarf::Attribute(AttrSpec.Attr), dwarf::Form(AttrSpec.Form),
- Attr);
return AttrSize;
}
@@ -2170,7 +2163,7 @@ DIE *DwarfLinker::cloneDIE(const DWARFDebugInfoEntryMinimal &InputDIE,
// (see cloneDieReferenceAttribute()).
DIE *Die = Info.Clone;
if (!Die)
- Die = Info.Clone = new DIE(dwarf::Tag(InputDIE.getTag()));
+ Die = Info.Clone = DIE::get(DIEAlloc, dwarf::Tag(InputDIE.getTag()));
assert(Die->getTag() == InputDIE.getTag());
Die->setOffset(OutOffset);
@@ -2262,7 +2255,7 @@ DIE *DwarfLinker::cloneDIE(const DWARFDebugInfoEntryMinimal &InputDIE,
for (auto *Child = InputDIE.getFirstChild(); Child && !Child->isNULL();
Child = Child->getSibling()) {
if (DIE *Clone = cloneDIE(*Child, Unit, PCOffset, OutOffset)) {
- Die->addChild(std::unique_ptr<DIE>(Clone));
+ Die->addChild(Clone);
OutOffset = Clone->getOffset() + Clone->getSize();
}
}
@@ -2364,6 +2357,16 @@ static void insertLineSequence(std::vector<DWARFDebugLine::Row> &Seq,
Seq.clear();
}
+static void patchStmtList(DIE &Die, DIEInteger Offset) {
+ for (auto &V : Die.values())
+ if (V.getAttribute() == dwarf::DW_AT_stmt_list) {
+ V = DIEValue(V.getAttribute(), V.getForm(), Offset);
+ return;
+ }
+
+ llvm_unreachable("Didn't find DW_AT_stmt_list in cloned DIE!");
+}
+
/// \brief Extract the line table for \p Unit from \p OrigDwarf, and
/// recreate a relocated version of these for the address ranges that
/// are present in the binary.
@@ -2376,18 +2379,8 @@ void DwarfLinker::patchLineTableForUnit(CompileUnit &Unit,
return;
// Update the cloned DW_AT_stmt_list with the correct debug_line offset.
- if (auto *OutputDIE = Unit.getOutputUnitDIE()) {
- auto Stmt =
- std::find_if(OutputDIE->values_begin(), OutputDIE->values_end(),
- [](const DIEValue &Value) {
- return Value.getAttribute() == dwarf::DW_AT_stmt_list;
- });
- assert(Stmt != OutputDIE->values_end() &&
- "Didn't find DW_AT_stmt_list in cloned DIE!");
- OutputDIE->setValue(Stmt - OutputDIE->values_begin(),
- DIEValue(Stmt->getAttribute(), Stmt->getForm(),
- DIEInteger(Streamer->getLineSectionSize())));
- }
+ if (auto *OutputDIE = Unit.getOutputUnitDIE())
+ patchStmtList(*OutputDIE, DIEInteger(Streamer->getLineSectionSize()));
// Parse the original line info for the unit.
DWARFDebugLine::LineTable LineTable;
generated by cgit v1.3 (git 2.53.0) at 2026-09-04 22:26:29 +0000