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Add a DW_AT_high_pc for CUs that are a single address range. Update

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all tests accordingly.

Fixes PR13351.

Patch by shinichiro hamaji!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160899 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher
2012-07-27 22:00:05 +00:00
parent c16bf79303
commit c23b933d5f
12 changed files with 71 additions and 29 deletions
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27
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -127,7 +127,8 @@ DwarfDebug::DwarfDebug(AsmPrinter *A, Module *M)
: Asm(A), MMI(Asm->MMI), FirstCU(0),
AbbreviationsSet(InitAbbreviationsSetSize),
SourceIdMap(DIEValueAllocator), StringPool(DIEValueAllocator),
PrevLabel(NULL) {
PrevLabel(NULL),
HasNonTextSection(false) {
NextStringPoolNumber = 0;
DwarfInfoSectionSym = DwarfAbbrevSectionSym = 0;
@ -561,9 +562,6 @@ CompileUnit *DwarfDebug::constructCompileUnit(const MDNode *N) {
NewCU->addUInt(Die, dwarf::DW_AT_language, dwarf::DW_FORM_data2,
DIUnit.getLanguage());
NewCU->addString(Die, dwarf::DW_AT_name, FN);
// 2.17.1 requires that we use DW_AT_low_pc for a single entry point
// into an entity.
NewCU->addUInt(Die, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr, 0);
// DW_AT_stmt_list is a offset of line number information for this
// compile unit in debug_line section.
if (Asm->MAI->doesDwarfUseRelocationsAcrossSections())
@ -787,12 +785,25 @@ void DwarfDebug::endModule() {
FirstCU->addUInt(ISP, dwarf::DW_AT_inline, 0, dwarf::DW_INL_inlined);
}
// Emit DW_AT_containing_type attribute to connect types with their
// vtable holding type.
for (DenseMap<const MDNode *, CompileUnit *>::iterator CUI = CUMap.begin(),
CUE = CUMap.end(); CUI != CUE; ++CUI) {
// Emit DW_AT_containing_type attribute to connect types with their
// vtable holding type.
CompileUnit *TheCU = CUI->second;
TheCU->constructContainingTypeDIEs();
// Emit low_pc and high_pc for CU.
DIE *Die = TheCU->getCUDie();
if (HasNonTextSection) {
// 2.17.1 requires that we use DW_AT_low_pc for a single entry point
// into an entity.
TheCU->addUInt(Die, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr, 0);
} else {
TheCU->addLabel(Die, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
Asm->GetTempSymbol("text_begin"));
TheCU->addLabel(Die, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
Asm->GetTempSymbol("text_end"));
}
}
// Standard sections final addresses.
@ -852,6 +863,7 @@ void DwarfDebug::endModule() {
E = CUMap.end(); I != E; ++I)
delete I->second;
FirstCU = NULL; // Reset for the next Module, if any.
HasNonTextSection = false;
}
/// findAbstractVariable - Find abstract variable, if any, associated with Var.
@ -1220,6 +1232,9 @@ void DwarfDebug::beginFunction(const MachineFunction *MF) {
if (LScopes.empty()) return;
identifyScopeMarkers();
if (!Asm->getCurrentSection()->getKind().isText())
HasNonTextSection = true;
FunctionBeginSym = Asm->GetTempSymbol("func_begin",
Asm->getFunctionNumber());
// Assumes in correct section after the entry point.

3
lib/CodeGen/AsmPrinter/DwarfDebug.h
View File

@ -307,6 +307,9 @@ class DwarfDebug {
// table for the same directory as DW_at_comp_dir.
StringRef CompilationDir;
// True if the current module has non text section.
bool HasNonTextSection;
private:
/// assignAbbrevNumber - Define a unique number for the abbreviation.