maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

DwarfDebug: Emit dwo_id+dwo_name for DICompileUnits that provide a dwoId. 

For module debugging clang emits prefabricated skeleton compile units
that can be recognized by a nonzero dwoId.

llvm-svn: 247626
This commit is contained in:
Adrian Prantl 2015-09-14 22:10:22 +00:00
parent 80faee82e6
commit deef90d7f5
2 changed files with 23 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -459,6 +459,14 @@ DwarfDebug::constructDwarfCompileUnit(const DICompileUnit *DIUnit) {
else
NewCU.initSection(Asm->getObjFileLowering().getDwarfInfoSection());
// Module debugging: This is a prefabricated skeleton CU.
if (DIUnit->getDWOId()) {
NewCU.addUInt(Die, dwarf::DW_AT_GNU_dwo_id, dwarf::DW_FORM_data8,
DIUnit->getDWOId());
NewCU.addString(Die, dwarf::DW_AT_GNU_dwo_name,
DIUnit->getSplitDebugFilename());
}
CUMap.insert(std::make_pair(DIUnit, &NewCU));
CUDieMap.insert(std::make_pair(&Die, &NewCU));
return NewCU;

15
llvm/test/DebugInfo/skeletoncu.ll Normal file
View File

@ -0,0 +1,15 @@
; RUN: %llc_dwarf %s -filetype=obj -o %t
; RUN: llvm-dwarfdump -debug-dump=info %t | FileCheck %s
; CHECK: DW_TAG_compile_unit
; CHECK: DW_AT_GNU_dwo_id {{.*}}abcd
; CHECK: DW_AT_GNU_dwo_name {{.*}}"my.dwo"
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "LLVM", isOptimized: false, runtimeVersion: 2, splitDebugFilename: "my.dwo", emissionKind: 1, enums: !2, retainedTypes: !2, subprograms: !2, globals: !2, imports: !2, dwoId: 43981)
!1 = !DIFile(filename: "<stdin>", directory: "/")
!2 = !{}
!3 = !{i32 2, !"Dwarf Version", i32 4}
!4 = !{i32 2, !"Debug Info Version", i32 3}