[Bug debug/88878] .debug_pubnames/types empty with -flto
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88878 --- Comment #9 from Jan Kratochvil --- (In reply to Richard Biener from comment #8) > The .debug_types section isn't supposed to be output when in_lto_p > (that's for the LTRANS units where we generally do not output any > types into DWARF). Instead .debug_types has to be output during > dwarf2out_early_finish when we write the declaration dwarf units, > the "early" debug info. That should now be done. Thanks for the explanation, I see -fdebug-types-section -flto does work with trunk without any patch, great! > You can verify with a small testcase and -gpubnames [-flto] where > with -flto both .debug_pubtype and .debug_pubnames are missing. I do not think anyone is interested in those, for DWARF-5 they are officially removed: http://www.dwarfstd.org/doc/DWARF5.pdf * Replace the .debug_pubnames and .debug_pubtypes sections with a single and more functional name index section, .debug_names . And for DWARF-4 those were replaced by GNU .gdb_index .
[Bug debug/88878] .debug_pubnames/types empty with -flto
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88878 --- Comment #8 from Richard Biener --- (In reply to Jan Kratochvil from comment #7) > Hello, @rguenth could you suggest what problem does -fdebug-types-section > -flto still have? > When I remove the use_debug_types's "&& !in_lto_p" part it looks to me as > working fine. (I haven't done any non-trivial debuginfo testing.) The .debug_types section isn't supposed to be output when in_lto_p (that's for the LTRANS units where we generally do not output any types into DWARF). Instead .debug_types has to be output during dwarf2out_early_finish when we write the declaration dwarf units, the "early" debug info. That should now be done. What's still missing is pubnames/pubtypes I think, -fdebug-types-section works fine now. But -gpubnames is not. You can verify with a small testcase and -gpubnames [-flto] where with -flto both .debug_pubtype and .debug_pubnames are missing. But nobody complained in years so I gues -gpubnames is unused.
[Bug debug/88878] .debug_pubnames/types empty with -flto
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88878 Jan Kratochvil changed: What|Removed |Added CC||jan.kratochvil at redhat dot com --- Comment #7 from Jan Kratochvil --- Hello, @rguenth could you suggest what problem does -fdebug-types-section -flto still have? When I remove the use_debug_types's "&& !in_lto_p" part it looks to me as working fine. (I haven't done any non-trivial debuginfo testing.) Contents of the .debug_info section: Compilation Unit @ offset 0x0: Version: 4 <0>: Abbrev Number: 1 (DW_TAG_compile_unit) DW_AT_producer: (indirect string, offset: 0x0): GNU GIMPLE 10.2.1 20200723 (Red Hat 10.2.1-1) -mtune=generic -march=x86-64 -g -g -fno-openmp -fno-openacc -fno-pie -fdebug-types-section -fltrans <11> DW_AT_name: (indirect string, offset: 0xa8): Compilation Unit @ offset 0xc9: Version: 4 <0>: Abbrev Number: 11 (DW_TAG_compile_unit) DW_AT_producer: (indirect string, offset: 0x35a): GNU C++14 10.2.1 20200723 (Red Hat 10.2.1-1) -mtune=generic -march=x86-64 -g -fdebug-types-section -flto DW_AT_name: (indirect string, offset: 0x20e): main.C <1>: Abbrev Number: 12 (DW_TAG_class_type) DW_AT_signature : signature: 0xf1df7e53d0fa1d2e Compilation Unit @ offset 0x15a: Version: 4 <0><165>: Abbrev Number: 11 (DW_TAG_compile_unit) <166> DW_AT_producer: (indirect string, offset: 0x35a): GNU C++14 10.2.1 20200723 (Red Hat 10.2.1-1) -mtune=generic -march=x86-64 -g -fdebug-types-section -flto <16b> DW_AT_name: (indirect string, offset: 0x479): lib.C Contents of the .debug_types section: Compilation Unit @ offset 0x0: Version: 4 Signature: 0xf1df7e53d0fa1d2e Type Offset: 0x25 <0><17>: Abbrev Number: 1 (DW_TAG_type_unit) <19> DW_AT_GNU_odr_signature: 0xddd94cb16fdd687a <1><25>: Abbrev Number: 2 (DW_TAG_class_type)
[Bug debug/88878] .debug_pubnames/types empty with -flto
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88878 --- Comment #5 from Richard Biener --- Author: rguenth Date: Fri Mar 1 12:38:38 2019 New Revision: 269305 URL: https://gcc.gnu.org/viewcvs?rev=269305=gcc=rev Log: 2019-03-01 Richard Biener Backport from mainline 2019-03-01 Jakub Jelinek PR bootstrap/89539 * dwarf2out.c (output_comdat_type_unit): Add ATTRIBUTE_UNUSED to early_lto_debug argument. 2019-02-27 Richard Biener PR debug/88878 * dwarf2out.c (use_debug_types): Disable when in_lto_p. 2019-02-27 Richard Biener PR debug/88878 * dwarf2out.c (output_comdat_type_unit): Add early_lto_debug parameter, prefix section name with .gnu.debuglto_ if true. (dwarf2out_finish): Pass false to output_comdat_type_unit. (dwarf2out_early_finish): Pass true to output_comdat_type_unit. 2019-02-27 Richard Biener PR debug/89514 * dwarf2out.c (size_of_die): Key on AT_ref (a)->comdat_type_p rather than on use_debug_types, doing what output_die does. (value_format): Likewise. Modified: branches/gcc-8-branch/gcc/ChangeLog branches/gcc-8-branch/gcc/dwarf2out.c
[Bug debug/88878] .debug_pubnames/types empty with -flto
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88878 --- Comment #6 from Richard Biener --- -fdebug-types-section should be OK now on the branch as well.
[Bug debug/88878] .debug_pubnames/types empty with -flto
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88878 --- Comment #4 from Richard Biener --- Author: rguenth Date: Wed Feb 27 14:04:18 2019 New Revision: 269253 URL: https://gcc.gnu.org/viewcvs?rev=269253=gcc=rev Log: 2019-02-27 Richard Biener PR debug/88878 * dwarf2out.c (use_debug_types): Disable when in_lto_p. Modified: trunk/gcc/ChangeLog trunk/gcc/dwarf2out.c
[Bug debug/88878] .debug_pubnames/types empty with -flto
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88878 --- Comment #3 from Richard Biener --- -fdebug-types-section now work as expected.
[Bug debug/88878] .debug_pubnames/types empty with -flto
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88878 --- Comment #2 from Richard Biener --- Author: rguenth Date: Wed Feb 27 12:51:43 2019 New Revision: 269251 URL: https://gcc.gnu.org/viewcvs?rev=269251=gcc=rev Log: 2019-02-27 Richard Biener PR debug/88878 * dwarf2out.c (output_comdat_type_unit): Add early_lto_debug parameter, prefix section name with .gnu.debuglto_ if true. (dwarf2out_finish): Pass false to output_comdat_type_unit. (dwarf2out_early_finish): Pass true to output_comdat_type_unit. Modified: trunk/gcc/ChangeLog trunk/gcc/dwarf2out.c
[Bug debug/88878] .debug_pubnames/types empty with -flto
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88878 --- Comment #1 from Richard Biener --- Applies to -fdebug-types-section as well.
