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DW_AT_stmt_list attribute attached with a compile unit encodes offset of line number information for this compile unit in debug_line section. This offset is always zero when only one compile unit is emitted in a object file.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99223 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2010-03-22 22:38:48 +00:00
parent 9d39e616cc
commit 0493f95a2c
4 changed files with 4 additions and 77 deletions
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25
lib/CodeGen/AsmPrinter/DIE.cpp
View File

@ -277,31 +277,6 @@ void DIELabel::print(raw_ostream &O) {
}
#endif
//===----------------------------------------------------------------------===//
// DIESectionOffset Implementation
//===----------------------------------------------------------------------===//
/// EmitValue - Emit delta value.
///
void DIESectionOffset::EmitValue(DwarfPrinter *D, unsigned Form) const {
bool IsSmall = Form == dwarf::DW_FORM_data4;
D->EmitSectionOffset(Label, Section, IsSmall, IsEH);
}
/// SizeOf - Determine size of delta value in bytes.
///
unsigned DIESectionOffset::SizeOf(const TargetData *TD, unsigned Form) const {
if (Form == dwarf::DW_FORM_data4) return 4;
return TD->getPointerSize();
}
#ifndef NDEBUG
void DIESectionOffset::print(raw_ostream &O) {
O << "Off: " << Label->getName() << "-" << Section->getName()
<< "-" << IsEH;
}
#endif
//===----------------------------------------------------------------------===//
// DIEDelta Implementation
//===----------------------------------------------------------------------===//

32
lib/CodeGen/AsmPrinter/DIE.h
View File

@ -324,38 +324,6 @@ namespace llvm {
static bool classof(const DIELabel *) { return true; }
static bool classof(const DIEValue *L) { return L->getType() == isLabel; }
#ifndef NDEBUG
virtual void print(raw_ostream &O);
#endif
};
//===--------------------------------------------------------------------===//
/// DIESectionOffset - A section offset DIE.
///
class DIESectionOffset : public DIEValue {
const MCSymbol *Label;
const MCSymbol *Section;
bool IsEH : 1;
public:
DIESectionOffset(const MCSymbol *Lab, const MCSymbol *Sec,
bool isEH = false)
: DIEValue(isSectionOffset), Label(Lab), Section(Sec),
IsEH(isEH) {}
/// EmitValue - Emit section offset.
///
virtual void EmitValue(DwarfPrinter *D, unsigned Form) const;
/// SizeOf - Determine size of section offset value in bytes.
///
virtual unsigned SizeOf(const TargetData *TD, unsigned Form) const;
// Implement isa/cast/dyncast.
static bool classof(const DIESectionOffset *) { return true; }
static bool classof(const DIEValue *D) {
return D->getType() == isSectionOffset;
}
#ifndef NDEBUG
virtual void print(raw_ostream &O);
#endif

18
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -386,16 +386,6 @@ void DwarfDebug::addLabel(DIE *Die, unsigned Attribute, unsigned Form,
Die->addValue(Attribute, Form, Value);
}
/// addSectionOffset - Add a section offset label attribute data and value.
///
void DwarfDebug::addSectionOffset(DIE *Die, unsigned Attribute, unsigned Form,
const MCSymbol *Label,const MCSymbol *Section,
bool isEH) {
DIEValue *Value = new DIESectionOffset(Label, Section, isEH);
DIEValues.push_back(Value);
Die->addValue(Attribute, Form, Value);
}
/// addDelta - Add a label delta attribute data and value.
///
void DwarfDebug::addDelta(DIE *Die, unsigned Attribute, unsigned Form,
@ -1666,10 +1656,10 @@ void DwarfDebug::constructCompileUnit(MDNode *N) {
unsigned ID = GetOrCreateSourceID(Dir, FN);
DIE *Die = new DIE(dwarf::DW_TAG_compile_unit);
// FIXME: Why getting the delta between two identical labels??
addSectionOffset(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_data4,
getTempLabel("section_line"), getTempLabel("section_line"),
false);
// DW_AT_stmt_list is a offset of line number information for this
// compile unit in debug_line section. It is always zero when only one
// compile unit is emitted in one object file.
addUInt(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_data4, 0);
addString(Die, dwarf::DW_AT_producer, dwarf::DW_FORM_string,
DIUnit.getProducer());
addUInt(Die, dwarf::DW_AT_language, dwarf::DW_FORM_data1,

6
lib/CodeGen/AsmPrinter/DwarfDebug.h
View File

@ -250,12 +250,6 @@ class DwarfDebug : public DwarfPrinter {
void addLabel(DIE *Die, unsigned Attribute, unsigned Form,
const MCSymbol *Label);
/// addSectionOffset - Add a section offset label attribute data and value.
///
void addSectionOffset(DIE *Die, unsigned Attribute, unsigned Form,
const MCSymbol *Label, const MCSymbol *Section,
bool isEH = false);
/// addDelta - Add a label delta attribute data and value.
///
void addDelta(DIE *Die, unsigned Attribute, unsigned Form,