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DwarfDebug: Refactor out common skeleton construction code to be reused for type unit skeletons.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198846 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Blaikie 2014-01-09 04:28:46 +00:00
parent c95a251dd0
commit 6fc76f3ec4
3 changed files with 28 additions and 20 deletions
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39
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -2930,6 +2930,27 @@ void DwarfDebug::emitDebugRanges() {
// DWARF5 Experimental Separate Dwarf emitters.
void DwarfDebug::initSkeletonUnit(const DwarfUnit *U, DIE *Die,
DwarfUnit *NewU) {
NewU->addLocalString(Die, dwarf::DW_AT_GNU_dwo_name,
U->getCUNode().getSplitDebugFilename());
// Relocate to the beginning of the addr_base section, else 0 for the
// beginning of the one for this compile unit.
if (Asm->MAI->doesDwarfUseRelocationsAcrossSections())
NewU->addSectionLabel(Die, dwarf::DW_AT_GNU_addr_base,
DwarfAddrSectionSym);
else
NewU->addSectionOffset(Die, dwarf::DW_AT_GNU_addr_base, 0);
if (!CompilationDir.empty())
NewU->addLocalString(Die, dwarf::DW_AT_comp_dir, CompilationDir);
addGnuPubAttributes(NewU, Die);
SkeletonHolder.addUnit(NewU);
}
// This DIE has the following attributes: DW_AT_comp_dir, DW_AT_stmt_list,
// DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges, DW_AT_dwo_name, DW_AT_dwo_id,
// DW_AT_ranges_base, DW_AT_addr_base.
@ -2942,17 +2963,6 @@ DwarfCompileUnit *DwarfDebug::constructSkeletonCU(const DwarfCompileUnit *CU) {
NewCU->initSection(Asm->getObjFileLowering().getDwarfInfoSection(),
DwarfInfoSectionSym);
NewCU->addLocalString(Die, dwarf::DW_AT_GNU_dwo_name,
CU->getCUNode().getSplitDebugFilename());
// Relocate to the beginning of the addr_base section, else 0 for the
// beginning of the one for this compile unit.
if (Asm->MAI->doesDwarfUseRelocationsAcrossSections())
NewCU->addSectionLabel(Die, dwarf::DW_AT_GNU_addr_base,
DwarfAddrSectionSym);
else
NewCU->addSectionOffset(Die, dwarf::DW_AT_GNU_addr_base, 0);
// DW_AT_stmt_list is a offset of line number information for this
// compile unit in debug_line section.
// FIXME: Should handle multiple compile units.
@ -2961,12 +2971,7 @@ DwarfCompileUnit *DwarfDebug::constructSkeletonCU(const DwarfCompileUnit *CU) {
else
NewCU->addSectionOffset(Die, dwarf::DW_AT_stmt_list, 0);
if (!CompilationDir.empty())
NewCU->addLocalString(Die, dwarf::DW_AT_comp_dir, CompilationDir);
addGnuPubAttributes(NewCU, Die);
SkeletonHolder.addUnit(NewCU);
initSkeletonUnit(CU, Die, NewCU);
return NewCU;
}

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

@ -589,6 +589,9 @@ class DwarfDebug : public AsmPrinterHandler {
/// DWARF 5 Experimental Split Dwarf Emitters
/// \brief Initialize common features of skeleton units.
void initSkeletonUnit(const DwarfUnit *U, DIE *Die, DwarfUnit *NewU);
/// \brief Construct the split debug info compile unit for the debug info
/// section.
DwarfCompileUnit *constructSkeletonCU(const DwarfCompileUnit *CU);

6
test/DebugInfo/X86/fission-cu.ll
View File

@ -23,9 +23,9 @@
; CHECK: .debug_abbrev contents:
; CHECK: Abbrev table for offset: 0x00000000
; CHECK: [1] DW_TAG_compile_unit DW_CHILDREN_no
; CHECK: DW_AT_stmt_list DW_FORM_sec_offset
; CHECK: DW_AT_GNU_dwo_name DW_FORM_strp
; CHECK: DW_AT_GNU_addr_base DW_FORM_sec_offset
; CHECK: DW_AT_stmt_list DW_FORM_sec_offset
; CHECK: DW_AT_comp_dir DW_FORM_strp
; CHECK: DW_AT_GNU_dwo_id DW_FORM_data8
; CHECK: DW_AT_low_pc DW_FORM_addr
@ -57,9 +57,9 @@
; CHECK: .debug_info contents:
; CHECK: DW_TAG_compile_unit
; CHECK: DW_AT_stmt_list [DW_FORM_sec_offset] (0x00000000)
; CHECK: DW_AT_GNU_dwo_name [DW_FORM_strp] ( .debug_str[0x00000000] = "baz.dwo")
; CHECK: DW_AT_GNU_addr_base [DW_FORM_sec_offset] (0x00000000)
; CHECK: DW_AT_stmt_list [DW_FORM_sec_offset] (0x00000000)
; CHECK: DW_AT_comp_dir [DW_FORM_strp] ( .debug_str[0x00000008] = "/usr/local/google/home/echristo/tmp")
; CHECK: DW_AT_GNU_dwo_id [DW_FORM_data8] (0x0000000000000000)
; CHECK: DW_AT_low_pc [DW_FORM_addr] (0x0000000000000000)
@ -105,9 +105,9 @@
;
; OBJ: .debug_info
; OBJ-NEXT: R_X86_64_32 .debug_abbrev
; OBJ-NEXT: R_X86_64_32 .debug_line
; OBJ-NEXT: R_X86_64_32 .debug_str
; OBJ-NEXT: R_X86_64_32 .debug_addr
; OBJ-NEXT: R_X86_64_32 .debug_line
; OBJ-NEXT: R_X86_64_32 .debug_str
; OBJ-NEXT: }
; OBJ: .debug_aranges