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Use DW_AT_specification to point to DIE describing function declaration.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91278 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2009-12-14 16:18:45 +00:00
parent bc1c99c4fb
commit ffe966c15b
2 changed files with 32 additions and 63 deletions
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83
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -906,7 +906,7 @@ void DwarfDebug::constructTypeDIE(DIE &Buffer, DICompositeType CTy) {
continue;
DIE *ElemDie = NULL;
if (Element.getTag() == dwarf::DW_TAG_subprogram)
ElemDie = createMemberSubprogramDIE(DISubprogram(Element.getNode()));
ElemDie = createSubprogramDIE(DISubprogram(Element.getNode()));
else
ElemDie = createMemberDIE(DIDerivedType(Element.getNode()));
Buffer.addChild(ElemDie);
@ -1098,11 +1098,13 @@ DIE *DwarfDebug::createMemberDIE(const DIDerivedType &DT) {
return MemberDie;
}
/// createRawSubprogramDIE - Create new partially incomplete DIE. This is
/// a helper routine used by createMemberSubprogramDIE and
/// createSubprogramDIE.
DIE *DwarfDebug::createRawSubprogramDIE(const DISubprogram &SP) {
DIE *SPDie = new DIE(dwarf::DW_TAG_subprogram);
/// createSubprogramDIE - Create new DIE using SP.
DIE *DwarfDebug::createSubprogramDIE(const DISubprogram &SP, bool MakeDecl) {
DIE *SPDie = ModuleCU->getDIE(SP.getNode());
if (SPDie)
return SPDie;
SPDie = new DIE(dwarf::DW_TAG_subprogram);
addString(SPDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, SP.getName());
StringRef LinkageName = SP.getLinkageName();
@ -1144,52 +1146,7 @@ DIE *DwarfDebug::createRawSubprogramDIE(const DISubprogram &SP) {
ContainingTypeMap.insert(std::make_pair(SPDie, WeakVH(SP.getContainingType().getNode())));
}
return SPDie;
}
/// createMemberSubprogramDIE - Create new member DIE using SP. This routine
/// always returns a die with DW_AT_declaration attribute.
DIE *DwarfDebug::createMemberSubprogramDIE(const DISubprogram &SP) {
DIE *SPDie = ModuleCU->getDIE(SP.getNode());
if (!SPDie)
SPDie = createSubprogramDIE(SP);
// If SPDie has DW_AT_declaration then reuse it.
if (!SP.isDefinition())
return SPDie;
// Otherwise create new DIE for the declaration. First push definition
// DIE at the top level.
if (TopLevelDIEs.insert(SPDie))
TopLevelDIEsVector.push_back(SPDie);
SPDie = createRawSubprogramDIE(SP);
// Add arguments.
DICompositeType SPTy = SP.getType();
DIArray Args = SPTy.getTypeArray();
unsigned SPTag = SPTy.getTag();
if (SPTag == dwarf::DW_TAG_subroutine_type)
for (unsigned i = 1, N = Args.getNumElements(); i < N; ++i) {
DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter);
addType(Arg, DIType(Args.getElement(i).getNode()));
addUInt(Arg, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1); // ??
SPDie->addChild(Arg);
}
addUInt(SPDie, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1);
return SPDie;
}
/// createSubprogramDIE - Create new DIE using SP.
DIE *DwarfDebug::createSubprogramDIE(const DISubprogram &SP) {
DIE *SPDie = ModuleCU->getDIE(SP.getNode());
if (SPDie)
return SPDie;
SPDie = createRawSubprogramDIE(SP);
if (!SP.isDefinition()) {
if (MakeDecl || !SP.isDefinition()) {
addUInt(SPDie, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1);
// Add arguments. Do not add arguments for subprogram definition. They will
@ -1310,6 +1267,28 @@ DIE *DwarfDebug::updateSubprogramScopeDIE(MDNode *SPNode) {
DIE *SPDie = ModuleCU->getDIE(SPNode);
assert (SPDie && "Unable to find subprogram DIE!");
DISubprogram SP(SPNode);
if (SP.isDefinition() && !SP.getContext().isCompileUnit()) {
addUInt(SPDie, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1);
// Add arguments.
DICompositeType SPTy = SP.getType();
DIArray Args = SPTy.getTypeArray();
unsigned SPTag = SPTy.getTag();
if (SPTag == dwarf::DW_TAG_subroutine_type)
for (unsigned i = 1, N = Args.getNumElements(); i < N; ++i) {
DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter);
addType(Arg, DIType(Args.getElement(i).getNode()));
addUInt(Arg, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1); // ??
SPDie->addChild(Arg);
}
DIE *SPDeclDie = SPDie;
SPDie = new DIE(dwarf::DW_TAG_subprogram);
addDIEEntry(SPDie, dwarf::DW_AT_specification, dwarf::DW_FORM_ref4,
SPDeclDie);
ModuleCU->addDie(SPDie);
}
addLabel(SPDie, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
DWLabel("func_begin", SubprogramCount));
addLabel(SPDie, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,

12
lib/CodeGen/AsmPrinter/DwarfDebug.h
View File

@ -350,17 +350,7 @@ class DwarfDebug : public Dwarf {
DIE *createMemberDIE(const DIDerivedType &DT);
/// createSubprogramDIE - Create new DIE using SP.
DIE *createSubprogramDIE(const DISubprogram &SP);
/// createMemberSubprogramDIE - Create new member DIE using SP. This
/// routine always returns a die with DW_AT_declaration attribute.
DIE *createMemberSubprogramDIE(const DISubprogram &SP);
/// createRawSubprogramDIE - Create new partially incomplete DIE. This is
/// a helper routine used by createMemberSubprogramDIE and
/// createSubprogramDIE.
DIE *createRawSubprogramDIE(const DISubprogram &SP);
DIE *createSubprogramDIE(const DISubprogram &SP, bool MakeDecl = false);
/// findCompileUnit - Get the compile unit for the given descriptor.
///