https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81155
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
As
make check-gcc
RUNTESTFLAGS='--target_board=unix\{-fno-reorder-blocks-and-partition,-freorder-blocks-and-partition\}
guality.exp=pr43051-1.c'
shows, it is a -freorder-blocks-and-partition related, but it actually isn't
about missing debug info for those vars, it is all there.
gdb ./pr43051-1.exe
(gdb) b pr43051-1.c:34
Breakpoint 2 at 0x4005ff: file
/usr/src/gcc/gcc/testsuite/gcc.dg/guality/pr43051-1.c, line 34.
(gdb) r
Starting program: /usr/src/gcc/obj/gcc/pr43051-1.exe
Breakpoint 2, bar (c=0x601060 <a>, v=1, e=0x601070 <a+16>) at
/usr/src/gcc/gcc/testsuite/gcc.dg/guality/pr43051-1.c:34
34 foo ("c", (__UINTPTR_TYPE__) c, 0); /* { dg-final {
gdb-test 34 "c" "\&a\[0\]" } } */
(gdb) p c
$1 = (struct S *) 0x601060 <a>
(gdb) n
35 foo ("v", v, 1); /* { dg-final {
gdb-test 35 "v" "1" } } */
(gdb) p v
$2 = 1
(gdb) n
36 foo ("e", (__UINTPTR_TYPE__) e, 2); /* { dg-final {
gdb-test 36 "e" "\&a\[1\]" } } */
(gdb) p e
$3 = (struct S *) 0x601070 <a+16>
(gdb) b 39
Breakpoint 3 at 0x4005c0: file
/usr/src/gcc/gcc/testsuite/gcc.dg/guality/pr43051-1.c, line 39.
(gdb) c
Continuing.
Breakpoint 3, bar (c=0x601060 <a>, v=1, e=0x601070 <a+16>) at
/usr/src/gcc/gcc/testsuite/gcc.dg/guality/pr43051-1.c:39
39 foo ("c", (__UINTPTR_TYPE__) c, 3); /* { dg-final {
gdb-test 39 "c" "\&a\[0\]" } } */
(gdb) p c
$4 = (struct S *) 0x601060 <a>
(gdb) n
40 foo ("v", v, 4); /* { dg-final {
gdb-test 40 "v" "1" } } */
(gdb) p v
$5 = 1
(gdb) n
41 foo ("e", (__UINTPTR_TYPE__) e, 5); /* { dg-final {
gdb-test 41 "e" "\&a\[1\]" } } */
(gdb) p e
$6 = (struct S *) 0x601070 <a+16>
The reason it fails is different, in the logs there is:
spawn gdb -nx -nw -quiet -batch -x pr43051-1.gdb ./pr43051-1.exe
No line 34 in the current file.
Make breakpoint pending on future shared library load? (y or [n]) [answered N;
input not from terminal]
and indeed that is what one can see:
gdba ./pr43051-1.exe
(gdb) l
1 <artificial>: No such file or directory.
(gdb) b 34
No line 34 in the current file.
Make breakpoint pending on future shared library load? (y or [n]) y
Breakpoint 2 (34) pending.
So, either gdb 8.0.1-33.fc27 is too old to handle the LTO debug info, or there
is something wrong in it.
