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DebugInfo: Partial implementation of DWARF type units.

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Emit DW_TAG_type_units into the debug_info section using compile unit
headers. This is bogus/unusable by debuggers, but testable and provides
more isolated review.

Subsequent patches will include support for type unit headers and
emission into the debug_types section, as well as comdat grouping the
types based on their hash. Also the CompileUnit type will be renamed
'Unit' and relevant portions pulled out into respective CompileUnit and
TypeUnit types.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195166 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Blaikie
2013-11-19 23:08:21 +00:00
parent d4010998b0
commit 6fe6dc19f8
8 changed files with 151 additions and 54 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/CodeGen/AsmPrinter/DIE.cpp
+7 -4
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@@ -114,18 +114,19 @@ DIE::~DIE() {
/// Climb up the parent chain to get the compile unit DIE to which this DIE
/// belongs.
const DIE *DIE::getCompileUnit() const {
const DIE *Cu = getCompileUnitOrNull();
const DIE *DIE::getUnit() const {
const DIE *Cu = getUnitOrNull();
assert(Cu && "We should not have orphaned DIEs.");
return Cu;
}
/// Climb up the parent chain to get the compile unit DIE this DIE belongs
/// to. Return NULL if DIE is not added to an owner yet.
const DIE *DIE::getCompileUnitOrNull() const {
const DIE *DIE::getUnitOrNull() const {
const DIE *p = this;
while (p) {
if (p->getTag() == dwarf::DW_TAG_compile_unit)
if (p->getTag() == dwarf::DW_TAG_compile_unit ||
p->getTag() == dwarf::DW_TAG_type_unit)
return p;
p = p->getParent();
}
@@ -227,6 +228,7 @@ void DIEInteger::EmitValue(AsmPrinter *Asm, dwarf::Form Form) const {
case dwarf::DW_FORM_ref4: // Fall thru
case dwarf::DW_FORM_data4: Size = 4; break;
case dwarf::DW_FORM_ref8: // Fall thru
case dwarf::DW_FORM_ref_sig8: // Fall thru
case dwarf::DW_FORM_data8: Size = 8; break;
case dwarf::DW_FORM_GNU_str_index: Asm->EmitULEB128(Integer); return;
case dwarf::DW_FORM_GNU_addr_index: Asm->EmitULEB128(Integer); return;
@@ -253,6 +255,7 @@ unsigned DIEInteger::SizeOf(AsmPrinter *AP, dwarf::Form Form) const {
case dwarf::DW_FORM_ref4: // Fall thru
case dwarf::DW_FORM_data4: return sizeof(int32_t);
case dwarf::DW_FORM_ref8: // Fall thru
case dwarf::DW_FORM_ref_sig8: // Fall thru
case dwarf::DW_FORM_data8: return sizeof(int64_t);
case dwarf::DW_FORM_GNU_str_index: return MCAsmInfo::getULEB128Size(Integer);
case dwarf::DW_FORM_GNU_addr_index: return MCAsmInfo::getULEB128Size(Integer);