https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111958
Bug ID: 111958
Summary: Line number debugging information indicates wrong file
Product: gcc
Version: 13.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: shelmer.gcc at gmail dot com
Target Milestone: ---
Created attachment 56188
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=56188&action=edit
Preprocessed file for getgid.c
The line number debugging information is incorrect for versions 12.2.0 and
13.2.0. Sometimes the wrong file is used in the ".loc" assembler directives
which causes issues with GDB then debugging application.
This does not happen with version 4.8.5 or 4.8.9 (which come with REHL7).
Command line to reproduce:
gcc -v --save-temps -c -g -O2 getgid.c
Output from gcc-13.2.0:
Using built-in specs.
COLLECT_GCC=gcc
Target: x86_64-pc-linux-gnu
Configured with:
/export/wildstar1/helmers/toolset_test/TCore_Toolset/src/gcc-13.2.0/configure
--disable-maintainer-mode --disable-multilib
--prefix=/export/wildstar1/helmers/toolset_test/TCore_Toolset
--datarootdir=/export/wildstar1/helmers/toolset_test/TCore_Toolset
--disable-bootstrap
--with-gmp=/export/wildstar1/helmers/toolset_test/TCore_Toolset
--with-mpfr=/export/wildstar1/helmers/toolset_test/TCore_Toolset
--with-mpc=/export/wildstar1/helmers/toolset_test/TCore_Toolset
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 13.2.0 (GCC)
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-c' '-g' '-O2' '-mtune=generic'
'-march=x86-64'
/export/wildstar1/helmers/toolset_test/TCore_Toolset/libexec/gcc/x86_64-pc-linux-gnu/13.2.0/cc1
-E -quiet -v getgid.c -mtune=generic -march=x86-64 -g -fworking-directory -O2
-fpch-preprocess -o getgid.i
ignoring nonexistent directory
"/export/wildstar1/helmers/toolset_test/TCore_Toolset/lib/gcc/x86_64-pc-linux-gnu/13.2.0/../../../../x86_64-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/export/wildstar1/helmers/toolset_test/TCore_Toolset/lib/gcc/x86_64-pc-linux-gnu/13.2.0/include
/usr/local/include
/export/wildstar1/helmers/toolset_test/TCore_Toolset/include
/export/wildstar1/helmers/toolset_test/TCore_Toolset/lib/gcc/x86_64-pc-linux-gnu/13.2.0/include-fixed
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-c' '-g' '-O2' '-mtune=generic'
'-march=x86-64'
/export/wildstar1/helmers/toolset_test/TCore_Toolset/libexec/gcc/x86_64-pc-linux-gnu/13.2.0/cc1
-fpreprocessed getgid.i -quiet -dumpbase getgid.c -dumpbase-ext .c
-mtune=generic -march=x86-64 -g -O2 -version -o getgid.s
GNU C17 (GCC) version 13.2.0 (x86_64-pc-linux-gnu)
compiled by GNU C version 4.8.5 20150623 (Red Hat 4.8.5-44), GMP
version 6.3.0, MPFR version 4.2.1, MPC version 1.3.1, isl version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 39ec987cd36af7de9356af0202288cf7
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-c' '-g' '-O2' '-mtune=generic'
'-march=x86-64'
/export/wildstar1/helmers/toolset_test/TCore_Toolset/lib/gcc/x86_64-pc-linux-gnu/13.2.0/../../../../x86_64-pc-linux-gnu/bin/as
-v --gdwarf-5 --64 -o getgid.o getgid.s
GNU assembler version 2.41 (x86_64-pc-linux-gnu) using BFD version (GNU
Binutils) 2.41
COMPILER_PATH=/export/wildstar1/helmers/toolset_test/TCore_Toolset/libexec/gcc/x86_64-pc-linux-gnu/13.2.0/:/export/wildstar1/helmers/toolset_test/TCore_Toolset/libexec/gcc/x86_64-pc-linux-gnu/13.2.0/:/export/wildstar1/helmers/toolset_test/TCore_Toolset/libexec/gcc/x86_64-pc-linux-gnu/:/export/wildstar1/helmers/toolset_test/TCore_Toolset/lib/gcc/x86_64-pc-linux-gnu/13.2.0/:/export/wildstar1/helmers/toolset_test/TCore_Toolset/lib/gcc/x86_64-pc-linux-gnu/:/export/wildstar1/helmers/toolset_test/TCore_Toolset/lib/gcc/x86_64-pc-linux-gnu/13.2.0/../../../../x86_64-pc-linux-gnu/bin/
LIBRARY_PATH=/export/wildstar1/helmers/toolset_test/TCore_Toolset/lib/gcc/x86_64-pc-linux-gnu/13.2.0/:/export/wildstar1/helmers/toolset_test/TCore_Toolset/lib/gcc/x86_64-pc-linux-gnu/13.2.0/../../../../lib64/:/lib/../lib64/:/usr/lib/../lib64/:/export/wildstar1/helmers/toolset_test/TCore_Toolset/lib/gcc/x86_64-pc-linux-gnu/13.2.0/../../../../x86_64-pc-linux-gnu/lib/:/export/wildstar1/helmers/toolset_test/TCore_Toolset/lib/gcc/x86_64-pc-linux-gnu/13.2.0/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-c' '-g' '-O2' '-mtune=generic'
'-march=x86-64'
If you look at the assembly file generated by versions 4.8.5 and 13.2.0 you can
clearly see that some of the ".loc" directives from version 13.2.0 show that a
couple of the functions are located in unistd.h. When using version 4.8.5 all
".loc" directives indicate that all functions are located in getgid.c (as
expected).
