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* [Bug fortran/40998] New: Source with routine in CONTAINS section and a local variable: No symbol "nerr" in current context
@ 2009-08-07 12:53 toon at moene dot org
2009-08-07 13:57 ` [Bug fortran/40998] " burnus at gcc dot gnu dot org
` (6 more replies)
0 siblings, 7 replies; 8+ messages in thread
From: toon at moene dot org @ 2009-08-07 12:53 UTC (permalink / raw)
To: gcc-bugs
The following source, compiled with a recent 4.5 snapshot using -ggdb as the
only compiler option:
MODULE x04aafe_aux
IMPLICIT NONE
CONTAINS
SUBROUTINE dummy
INTEGER :: nerr
CALL x04aaf(0,nerr)
PRINT *, 'Hello',nerr
END SUBROUTINE dummy
END MODULE x04aafe_aux
PROGRAM x04aafe
USE x04aafe_aux
CALL x04aaf(1,666)
CALL dummy
END PROGRAM x04aafe
SUBROUTINE X04AAF(IFLAG,NERR)
INTEGER, INTENT (IN) :: IFLAG
INTEGER, INTENT (INOUT) :: NERR
INTEGER, SAVE :: NERR1
DATA NERR1/6/
IF (IFLAG==0) NERR = NERR1
IF (IFLAG==1) NERR1 = NERR
END SUBROUTINE X04AAF
gives, after entering gdb ./a.out and setting a break on the PRINT line in
routine DUMMY (line number 7):
Breakpoint 1, __x04aafe_aux_MOD_dummy () at x04aafe.f90:7
7 PRINT *, 'Hello',nerr
Current language: auto; currently fortran
(gdb) p nerr
No symbol "nerr" in current context.
--
Summary: Source with routine in CONTAINS section and a local
variable: No symbol "nerr" in current context
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: toon at moene dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40998
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug fortran/40998] Source with routine in CONTAINS section and a local variable: No symbol "nerr" in current context
2009-08-07 12:53 [Bug fortran/40998] New: Source with routine in CONTAINS section and a local variable: No symbol "nerr" in current context toon at moene dot org
@ 2009-08-07 13:57 ` burnus at gcc dot gnu dot org
2009-08-07 14:24 ` burnus at gcc dot gnu dot org
` (5 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: burnus at gcc dot gnu dot org @ 2009-08-07 13:57 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from burnus at gcc dot gnu dot org 2009-08-07 13:57 -------
I think there is a general GCC 4.5 problem with debugging symbols. I opened a
PR about this (PR 40660) - which is regarding Fortran - but there was recently
also GCC complaining at #gcc about this issue when debugging GCC itself, which
uses as we all know C.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40998
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug fortran/40998] Source with routine in CONTAINS section and a local variable: No symbol "nerr" in current context
2009-08-07 12:53 [Bug fortran/40998] New: Source with routine in CONTAINS section and a local variable: No symbol "nerr" in current context toon at moene dot org
2009-08-07 13:57 ` [Bug fortran/40998] " burnus at gcc dot gnu dot org
@ 2009-08-07 14:24 ` burnus at gcc dot gnu dot org
2009-08-07 14:32 ` burnus at gcc dot gnu dot org
` (4 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: burnus at gcc dot gnu dot org @ 2009-08-07 14:24 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from burnus at gcc dot gnu dot org 2009-08-07 14:23 -------
Hmm, actually your example works here:
(gdb) b 7
Breakpoint 1 at 0x4007a0: file hjff.f90, line 7.
(gdb) run
[...]
Breakpoint 1, dummy () at hjff.f90:7
7 PRINT *, 'Hello',nerr
(gdb) p nerr
$1 = 666
That's with GCC 4.5.0 20090805 and 6.8.50.20090803-10.1 (openSUSE's version,
which contains patches from Fedora/Jan Kratochvil). I do have the problem
mentioned in PR 40660 comment 2 that the same line appears several times.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40998
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug fortran/40998] Source with routine in CONTAINS section and a local variable: No symbol "nerr" in current context
2009-08-07 12:53 [Bug fortran/40998] New: Source with routine in CONTAINS section and a local variable: No symbol "nerr" in current context toon at moene dot org
2009-08-07 13:57 ` [Bug fortran/40998] " burnus at gcc dot gnu dot org
2009-08-07 14:24 ` burnus at gcc dot gnu dot org
@ 2009-08-07 14:32 ` burnus at gcc dot gnu dot org
2009-08-07 16:00 ` burnus at gcc dot gnu dot org
` (3 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: burnus at gcc dot gnu dot org @ 2009-08-07 14:32 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from burnus at gcc dot gnu dot org 2009-08-07 14:32 -------
The result of eu-readelf looks OK, however, since I read "module" for item 175,
I wonder whether this is a problem that gdb is too old. There was a change (I
think in the later stages of 4.4.0) which wrote the proper DWARF_MODULE* to the
ELF binary. However, gdb did ignore that bit. There was a fix for the gdb trunk
which allows to handle those DWARF_MODULEs in some way. (The patches on the
Fedora branch added the proper handling of module variables.)
I am not sure whether this is the real problem since "nerr" is not a module
variable but a local variable of a module procedure, but I wonder whether
nevertheless this could be the problem.
[ 175] module
decl_line 1
[ 180] subprogram
external
name "dummy"
decl_line 4
[ 19c] variable
name "nerr"
The Fedora branch can be found at
http://sourceware.org/git/?p=archer.git;a=summary and the patches also support
Fortran 95 style arrays (i.e. those using an array descriptor).
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40998
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug fortran/40998] Source with routine in CONTAINS section and a local variable: No symbol "nerr" in current context
2009-08-07 12:53 [Bug fortran/40998] New: Source with routine in CONTAINS section and a local variable: No symbol "nerr" in current context toon at moene dot org
` (2 preceding siblings ...)
2009-08-07 14:32 ` burnus at gcc dot gnu dot org
@ 2009-08-07 16:00 ` burnus at gcc dot gnu dot org
2009-08-07 16:58 ` toon at moene dot org
` (2 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: burnus at gcc dot gnu dot org @ 2009-08-07 16:00 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from burnus at gcc dot gnu dot org 2009-08-07 16:00 -------
> There was a change (I think in the later stages of 4.4.0) which wrote the proper
> DWARF_MODULE* to the ELF binary. However, gdb did ignore that bit.
> There was a fix for the gdb trunk
See: http://sourceware.org/bugzilla/show_bug.cgi?id=9806 (and PR 39073)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40998
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug fortran/40998] Source with routine in CONTAINS section and a local variable: No symbol "nerr" in current context
2009-08-07 12:53 [Bug fortran/40998] New: Source with routine in CONTAINS section and a local variable: No symbol "nerr" in current context toon at moene dot org
` (3 preceding siblings ...)
2009-08-07 16:00 ` burnus at gcc dot gnu dot org
@ 2009-08-07 16:58 ` toon at moene dot org
2009-12-04 23:43 ` dfranke at gcc dot gnu dot org
2010-03-20 9:40 ` toon at moene dot org
6 siblings, 0 replies; 8+ messages in thread
From: toon at moene dot org @ 2009-08-07 16:58 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from toon at moene dot org 2009-08-07 16:58 -------
Could indeed be the version of gdb.
Mine is:
$ gdb -v
GNU gdb 6.8-debian
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
which seems to be a bog standard 6.8 gdb (from 2008).
So perhaps it's not gfortran's fault, but a short-coming in not totally
up-to-date gdb's ....
Thanks,
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40998
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug fortran/40998] Source with routine in CONTAINS section and a local variable: No symbol "nerr" in current context
2009-08-07 12:53 [Bug fortran/40998] New: Source with routine in CONTAINS section and a local variable: No symbol "nerr" in current context toon at moene dot org
` (4 preceding siblings ...)
2009-08-07 16:58 ` toon at moene dot org
@ 2009-12-04 23:43 ` dfranke at gcc dot gnu dot org
2010-03-20 9:40 ` toon at moene dot org
6 siblings, 0 replies; 8+ messages in thread
From: dfranke at gcc dot gnu dot org @ 2009-12-04 23:43 UTC (permalink / raw)
To: gcc-bugs
------- Comment #6 from dfranke at gcc dot gnu dot org 2009-12-04 23:42 -------
(In reply to comment #5)
> So perhaps it's not gfortran's fault, but a short-coming in not totally
> up-to-date gdb's ....
Any news here?
--
dfranke at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dfranke at gcc dot gnu dot
| |org
Status|UNCONFIRMED |WAITING
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40998
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug fortran/40998] Source with routine in CONTAINS section and a local variable: No symbol "nerr" in current context
2009-08-07 12:53 [Bug fortran/40998] New: Source with routine in CONTAINS section and a local variable: No symbol "nerr" in current context toon at moene dot org
` (5 preceding siblings ...)
2009-12-04 23:43 ` dfranke at gcc dot gnu dot org
@ 2010-03-20 9:40 ` toon at moene dot org
6 siblings, 0 replies; 8+ messages in thread
From: toon at moene dot org @ 2010-03-20 9:40 UTC (permalink / raw)
To: gcc-bugs
------- Comment #7 from toon at moene dot org 2010-03-20 09:39 -------
Works when using Debian's version of gfortran 4.4.3 and their gdb (version
7.0.1).
--
toon at moene dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution| |WORKSFORME
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40998
^ permalink raw reply [flat|nested] 8+ messages in thread
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2009-08-07 12:53 [Bug fortran/40998] New: Source with routine in CONTAINS section and a local variable: No symbol "nerr" in current context toon at moene dot org
2009-08-07 13:57 ` [Bug fortran/40998] " burnus at gcc dot gnu dot org
2009-08-07 14:24 ` burnus at gcc dot gnu dot org
2009-08-07 14:32 ` burnus at gcc dot gnu dot org
2009-08-07 16:00 ` burnus at gcc dot gnu dot org
2009-08-07 16:58 ` toon at moene dot org
2009-12-04 23:43 ` dfranke at gcc dot gnu dot org
2010-03-20 9:40 ` toon at moene dot org
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