search for: _z2f2v

On Thu, Dec 15, 2016 at 11:35 AM Mehdi Amini <mehdi.amini at apple.com> wrote: > > > On Dec 15, 2016, at 10:54 AM, David Blaikie via llvm-dev < > llvm-dev at lists.llvm.org> wrote: > > > > Branching off from a discussion of improvements to DIGlobalVariable > representations that Adrian's working on - got me thinking about related > changes that have

...AG_compile_unit [1] * 0x19: DW_TAG_subprogram [2] 0x25: DW_TAG_subprogram [3] 0x31: DW_TAG_subprogram [4] 0x43: DW_TAG_compile_unit [1] * 0x51: DW_TAG_subprogram [5] * 0x5d: DW_TAG_inlined_subroutine [6] DW_AT_abstract_origin [DW_FORM_ref_addr] (0x31 "_Z2f2v") The ref_addr can be resolved relative to this whole .dwo file & the abstract subprogram is found. Yay. So GDB can't currently handle this: Could not find DWO CU ab.dwo(0x32dd6d7121dd1d9a) referenced by CU at offset 0x66 [in module a.out] And that's after some local fixes I...

...t; 0x25: DW_TAG_subprogram [3] >> 0x31: DW_TAG_subprogram [4] >> 0x43: DW_TAG_compile_unit [1] * >> 0x51: DW_TAG_subprogram [5] * >> 0x5d: DW_TAG_inlined_subroutine [6] >> DW_AT_abstract_origin [DW_FORM_ref_addr] (0x31 "_Z2f2v") >> >> The ref_addr can be resolved relative to this whole .dwo file & the abstract subprogram is found. Yay. >> >> So GDB can't currently handle this: >> >> Could not find DWO CU ab.dwo(0x32dd6d7121dd1d9a) referenced by CU at offset 0x66 [in m...

...AG_compile_unit [1] * 0x19: DW_TAG_subprogram [2] 0x25: DW_TAG_subprogram [3] 0x31: DW_TAG_subprogram [4] 0x43: DW_TAG_compile_unit [1] * 0x51: DW_TAG_subprogram [5] * 0x5d: DW_TAG_inlined_subroutine [6] DW_AT_abstract_origin [DW_FORM_ref_addr] (0x31 "_Z2f2v") The ref_addr can be resolved relative to this whole .dwo file & the abstract subprogram is found. Yay. So GDB can't currently handle this: Could not find DWO CU ab.dwo(0x32dd6d7121dd1d9a) referenced by CU at offset 0x66 [in module a.out] And that's after some local fixes I...

So Dehao and I have been dealing with some of the nitty gritty details of debug info with ThinLTO, specifically with Fission(Split DWARF). This applies to LTO as well, so I won't single out ThinLTO here. 1) Multiple CUs in a .dwo file Clang/LLVM produces a CU for each original source file - these CUs are kept through IR linking (thin or full) and produced as distinct CUs in the resulting