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From: "vries at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug ada/25666] segv when printing symbols for gdb.ada/access_to_packed_array/foo
Date: Fri, 13 Mar 2020 08:41:52 +0000 [thread overview]
Message-ID: <bug-25666-4717-YqWDRkOy0c@http.sourceware.org/bugzilla/> (raw)
In-Reply-To: <bug-25666-4717@http.sourceware.org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=25666
Tom de Vries <vries at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |brobecker at adacore dot com,
| |tromey at sourceware dot org
--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
Doing a backtrace at the point of the segv:
...
(gdb) bt
#0 0x00000000006628e7 in make_qualified_type (
type=<error reading variable: Cannot access memory at address
0x7fffff7feff8>,
new_flags=<error reading variable: Cannot access memory at address
0x7fffff7feff4>,
storage=<error reading variable: Cannot access memory at address
0x7fffff7fefe8>)
at /data/gdb_versions/devel/src/gdb/gdbtypes.c:621
#1 0x000000000066742f in check_typedef (type=0x1ca3370) at
/data/gdb_versions/devel/src/gdb/gdbtypes.c:2642
#2 0x000000000042ee78 in ada_check_typedef (type=0x1ca3370) at
/data/gdb_versions/devel/src/gdb/ada-lang.c:9063
#3 0x000000000041eb8c in desc_base_type (type=0x1ca3370) at
/data/gdb_versions/devel/src/gdb/ada-lang.c:1532
#4 0x000000000041ec0a in is_thin_pntr (type=0x1ca3370) at
/data/gdb_versions/devel/src/gdb/ada-lang.c:1550
#5 0x000000000041f13e in desc_data_target_type (type=0x1ca3370)
at /data/gdb_versions/devel/src/gdb/ada-lang.c:1721
#6 0x000000000041f61f in ada_is_array_descriptor_type (type=0x1ca3370)
at /data/gdb_versions/devel/src/gdb/ada-lang.c:1885
#7 0x000000000041fca5 in ada_is_constrained_packed_array_type (type=0x1ca3370)
at /data/gdb_versions/devel/src/gdb/ada-lang.c:2075
#8 0x000000000042c775 in find_parallel_type_by_descriptive_type
(type=0x1ca3370,
name=0x7fffff7ff210 "pack__Tarray_typeB___XP6___XUT___XVE")
at /data/gdb_versions/devel/src/gdb/ada-lang.c:7957
#9 0x000000000042c7db in ada_find_parallel_type_with_name (type=0x1ca3370,
name=0x7fffff7ff210 "pack__Tarray_typeB___XP6___XUT___XVE")
at /data/gdb_versions/devel/src/gdb/ada-lang.c:7973
#10 0x000000000042c8ca in ada_find_parallel_type (type=0x1ca3370,
suffix=0xb38568 "___XVE")
at /data/gdb_versions/devel/src/gdb/ada-lang.c:8000
#11 0x000000000041ecbc in thin_descriptor_type (type=0x1ca3370)
at /data/gdb_versions/devel/src/gdb/ada-lang.c:1567
--Type <RET> for more, q to quit, c to continue without paging--
#12 0x000000000041f153 in desc_data_target_type (type=0x1ca3370)
at /data/gdb_versions/devel/src/gdb/ada-lang.c:1722
#13 0x000000000041f61f in ada_is_array_descriptor_type (type=0x1ca3370)
at /data/gdb_versions/devel/src/gdb/ada-lang.c:1885
#14 0x000000000041fca5 in ada_is_constrained_packed_array_type (type=0x1ca3370)
at /data/gdb_versions/devel/src/gdb/ada-lang.c:2075
#15 0x000000000042c775 in find_parallel_type_by_descriptive_type
(type=0x1ca3370,
name=0x7fffff7ff3c0 "pack__Tarray_typeB___XP6___XUT___XVE")
at /data/gdb_versions/devel/src/gdb/ada-lang.c:7957
#16 0x000000000042c7db in ada_find_parallel_type_with_name (type=0x1ca3370,
name=0x7fffff7ff3c0 "pack__Tarray_typeB___XP6___XUT___XVE")
at /data/gdb_versions/devel/src/gdb/ada-lang.c:7973
#17 0x000000000042c8ca in ada_find_parallel_type (type=0x1ca3370,
suffix=0xb38568 "___XVE")
...
We find repetition in the call stack, f.i. this frame:
...
0x000000000042c8ca in ada_find_parallel_type (type=0x1ca3370, suffix=0xb38568
"___XVE")
...
occurs twice, at #10 and #17.
This works, so we probably segv because of running out of stack:
...
(gdb) up 100000
...
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next prev parent reply other threads:[~2020-03-13 8:41 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-13 8:34 [Bug ada/25666] New: " vries at gcc dot gnu.org
2020-03-13 8:41 ` vries at gcc dot gnu.org [this message]
2020-04-19 6:12 ` [Bug ada/25666] " vries at gcc dot gnu.org
2022-08-04 15:15 ` tromey at sourceware dot org
2023-08-06 12:07 ` vries at gcc dot gnu.org
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