https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101141
Bug ID: 101141
Summary: Fedora glibc debuginfo .dwz contains a partial unit
with needed debuginfo but which is not imported
Product: gcc
Version: 11.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: roc at ocallahan dot org
Target Milestone: ---
The Fedora 34 package glibc-debuginfo-2.33-16.fc34.x86_64 package has glibc
symbols in
/usr/lib/debug/.build-id/08/1490fc18239fa63189a53e526a68ee5d19c571.debug whose
.gnu_debugaltlink is /usr/lib/debug/usr/.dwz/glibc-2.33-16.fc34.x86_64.
/usr/lib/debug/.build-id/08/1490fc18239fa63189a53e526a68ee5d19c571.debug has a
compilation unit that imports the partial unit at 0x1f63c from the .dwz file:
UNIT<header overall offset = 0x000795ee>:
< 0><0x0000000c GOFF=0x000795fa> DW_TAG_compile_unit
DW_AT_producer
<.debug_str(sup)+0x0001200e>
DW_AT_language DW_LANG_C11
DW_AT_name global-locale.c
DW_AT_comp_dir
/usr/src/debug/glibc-2.33-16.fc34.x86_64/locale
DW_AT_stmt_list
<.debug_line+0x0000ce8a>
< 1><0x0000001e GOFF=0x0007960c> DW_TAG_imported_unit
DW_AT_import
<.debug_info(sup)+0x0001f63c>
That partial unit contains a variable declaration whose DW_AT_specification
(0x1f0d2) lives in another partial compilation unit:
UNIT<header overall offset = 0x0001f630>:
< 0><0x0000000c GOFF=0x0001f63c> DW_TAG_partial_unit
DW_AT_stmt_list
<.debug_line+0x00000000>
...
< 1><0x00000038 GOFF=0x0001f668> DW_TAG_variable
DW_AT_specification
<.debug_info+0x0001f0d2>
DW_AT_decl_file 0x0000013b
/usr/src/debug/glibc-2.33-16.fc34.x86_64/locale/global-locale.c
DW_AT_decl_line 0x00000040
DW_AT_decl_column 0x00000013
DW_AT_location len 0x000a:
0e00000000000000009b: DW_OP_const8u 0 DW_OP_form_tls_address
UNIT<header overall offset = 0x0001f0c1>:
< 0><0x0000000c GOFF=0x0001f0cd> DW_TAG_partial_unit
DW_AT_stmt_list
<.debug_line+0x00000000>
< 1><0x00000011 GOFF=0x0001f0d2> DW_TAG_variable
DW_AT_name
__libc_tsd_LOCALE
DW_AT_decl_file 0x00000089
/usr/src/debug/glibc-2.33-16.fc34.x86_64/locale/localeinfo.h
DW_AT_decl_line 0x000000e1
DW_AT_decl_column 0x00000001
DW_AT_type
<.debug_info+0x00035fb3>
DW_AT_external yes
DW_AT_declaration yes
However, the partial unit at 0x1f0cd is not imported anywhere in
/usr/lib/debug/.build-id/08/1490fc18239fa63189a53e526a68ee5d19c571.debug as far
as I can tell. I think the compilation unit at global-locale.c, at least,
should be importing it.
