* [Bug fortran/67567] resolve.c: gfc_error called with iface->module == NULL
2015-09-14 6:11 [Bug fortran/67567] New: pretty-print.h sanitizer detects NULL pointer passed to obstack_grow zeccav at gmail dot com
@ 2015-09-14 10:14 ` manu at gcc dot gnu.org
2015-09-14 14:27 ` zeccav at gmail dot com
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: manu at gcc dot gnu.org @ 2015-09-14 10:14 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67567
Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2015-09-14
CC| |manu at gcc dot gnu.org
Summary|pretty-print.h sanitizer |resolve.c: gfc_error called
|detects NULL pointer passed |with iface->module == NULL
|to obstack_grow |
Ever confirmed|0 |1
--- Comment #1 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Vittorio Zecca from comment #0)
> but I believe it best to fix it by prefixing the statement with "if(length)"
That would hide the real bug, which is that:
gfc_error ("%s between the MODULE PROCEDURE declaration "
"in module %s and the declaration at %L in "
"SUBMODULE %s", errmsg, iface->module,
&sym->declared_at, sym->ns->proc_name->name);
is called with iface->module == NULL.
(I think you are doing a nice job at finding and reporting all these sanitizer
issues, but it would be better to figure out the real causes in order to
implement the best solution, and for that you need to master GDB. Otherwise,
developers eager to close as many issues as fast as possible may end up slowing
down the compiler with unnecessary checks while hiding real bugs).
>From gcc-bugs-return-497146-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 14 10:22:02 2015
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/67569] erroneous compiler error message
Date: Mon, 14 Sep 2015 10:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67569
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |mpolacek at gcc dot gnu.org
Resolution|--- |WORKSFORME
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Can't reproduce:
h1.c: In function ‘main’:
h1.c:5:6: error: invalid operands to binary - (have ‘int *’ and ‘float’)
Also, gcc 4.8 is not supported anymore.
>From gcc-bugs-return-497147-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 14 10:41:02 2015
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From: "werner at beroux dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/67571] Error: open CFI at the end of file; missing .cfi_endproc directive
Date: Mon, 14 Sep 2015 10:41:00 -0000
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--- Comment #2 from werner at beroux dot com ---
It worked on gcc (Debian 4.9.2-2).
Also I tried on two machines with pretty different spec. I'm not excluding the
memory issue, just saying it used to work on those two machines and now it
doesn't.
^ permalink raw reply [flat|nested] 7+ messages in thread* [Bug fortran/67567] resolve.c: gfc_error called with iface->module == NULL
2015-09-14 6:11 [Bug fortran/67567] New: pretty-print.h sanitizer detects NULL pointer passed to obstack_grow zeccav at gmail dot com
2015-09-14 10:14 ` [Bug fortran/67567] resolve.c: gfc_error called with iface->module == NULL manu at gcc dot gnu.org
@ 2015-09-14 14:27 ` zeccav at gmail dot com
2015-09-14 16:24 ` manu at gcc dot gnu.org
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: zeccav at gmail dot com @ 2015-09-14 14:27 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67567
--- Comment #2 from Vittorio Zecca <zeccav at gmail dot com> ---
Unfortunately I do not master gdb and gcc internals enough for that.
The check costs two instructions on my x86-64.
^ permalink raw reply [flat|nested] 7+ messages in thread* [Bug fortran/67567] resolve.c: gfc_error called with iface->module == NULL
2015-09-14 6:11 [Bug fortran/67567] New: pretty-print.h sanitizer detects NULL pointer passed to obstack_grow zeccav at gmail dot com
2015-09-14 10:14 ` [Bug fortran/67567] resolve.c: gfc_error called with iface->module == NULL manu at gcc dot gnu.org
2015-09-14 14:27 ` zeccav at gmail dot com
@ 2015-09-14 16:24 ` manu at gcc dot gnu.org
2015-09-25 14:24 ` manu at gcc dot gnu.org
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: manu at gcc dot gnu.org @ 2015-09-14 16:24 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67567
--- Comment #3 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Vittorio Zecca from comment #2)
> Unfortunately I do not master gdb and gcc internals enough for that.
> The check costs two instructions on my x86-64.
Two instructions that we do not need to execute! :)
In this case, the worst part is that it will hide a bug in error reporting. It
will print something like:
Error: X between the MODULE PROCEDURE declaration in module and the
declaration at (1) in SUBMODULE Y
which is wrong.
>From gcc-bugs-return-497201-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 14 16:25:30 2015
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From: "cctsai57 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/67576] New: expression of typeid( expression ) is evaluated twice
Date: Mon, 14 Sep 2015 16:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idg576
Bug ID: 67576
Summary: expression of typeid( expression ) is evaluated twice
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: cctsai57 at gmail dot com
Target Milestone: ---
#include <typeinfo>
struct Base { virtual void foo() {} }; // polymorphic
int main()
{
Base b;
Base *ary[] = { &b, &b, &b};
int iter = 0;
typeid(*ary[iter++]);
if (iter != 1) // should be 1
__builtin_abort(); // but 2
return iter;
}
Compiler version:4.9.x, 5.x, 6.0
Description:
The above simplified code would get a wrong `iter' value after typeid
statement.
It seems to evaluate `iter++' twice.
I found that the code has not worked since the following fix:
commit cdb704aa83247f82d7b9aae934639a6be2e6681b
Author: jason <jason@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue Apr 9 18:11:38 2013 +0000
PR c++/25466
* rtti.c (build_typeid): Check the address of the argument
rather than looking for an INDIRECT_REF.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@197644
138bc75d-0d04-0410-961f-82ee72b054a4
^ permalink raw reply [flat|nested] 7+ messages in thread* [Bug fortran/67567] resolve.c: gfc_error called with iface->module == NULL
2015-09-14 6:11 [Bug fortran/67567] New: pretty-print.h sanitizer detects NULL pointer passed to obstack_grow zeccav at gmail dot com
` (2 preceding siblings ...)
2015-09-14 16:24 ` manu at gcc dot gnu.org
@ 2015-09-25 14:24 ` manu at gcc dot gnu.org
2015-09-26 18:04 ` pault at gcc dot gnu.org
2015-09-26 18:11 ` paul.richard.thomas at gmail dot com
5 siblings, 0 replies; 7+ messages in thread
From: manu at gcc dot gnu.org @ 2015-09-25 14:24 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67567
--- Comment #4 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Author: manu
Date: Fri Sep 25 14:24:11 2015
New Revision: 228131
URL: https://gcc.gnu.org/viewcvs?rev=228131&root=gcc&view=rev
Log:
PR pretty-print/67567 do not pass NULL as a string
Fortran passes NULL where a non-null string is expected by the pretty-printer,
which causes a sanitizer warning. This could have been found earlier by using
gcc_checking_assert. Even if the assertion is false, the result is just an
incomplete diagnostic, thus it seems more user-friendly to assert only when
checking. I do not have any idea how to properly fix the Fortran bug, thus this
patch simply works-around it.
gcc/fortran/ChangeLog:
2015-09-25 Manuel López-Ibáñez <manu@gcc.gnu.org>
PR pretty-print/67567
* resolve.c (resolve_fl_procedure): Work-around when iface->module
== NULL.
gcc/ChangeLog:
2015-09-25 Manuel López-Ibáñez <manu@gcc.gnu.org>
PR pretty-print/67567
* pretty-print.c (pp_string): Add gcc_checking_assert.
* pretty-print.h (output_buffer_append_r): Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/resolve.c
trunk/gcc/pretty-print.c
trunk/gcc/pretty-print.h
>From gcc-bugs-return-498043-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 25 14:36:45 2015
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Subject: [Bug fortran/67567] resolve.c: gfc_error called with iface->module == NULL
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
CC|manu at gcc dot gnu.org |fxcoudert at gcc dot gnu.org,
| |paul.richard.thomas at gmail dot c
| |om
--- Comment #5 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
This is a Fortran only issue now. Related to the submodules work apparently:
https://gcc.gnu.org/ml/fortran/2015-09/msg00094.html
>From gcc-bugs-return-498045-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 25 14:44:32 2015
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/67567] resolve.c: gfc_error called with iface->module == NULL
Date: Fri, 25 Sep 2015 14:44:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pault at gcc dot gnu.org
--- Comment #6 from Paul Thomas <pault at gcc dot gnu.org> ---
(In reply to Manuel López-Ibáñez from comment #5)
> This is a Fortran only issue now. Related to the submodules work apparently:
>
> https://gcc.gnu.org/ml/fortran/2015-09/msg00094.html
Thanks Manuel,
I'll get onto it.
Paul
>From gcc-bugs-return-498044-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 25 14:44:32 2015
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From: "olegendo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/67675] [SH] Improve __builtin_strcmp alignment test
Date: Fri, 25 Sep 2015 14:44:00 -0000
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Oleg Endo <olegendo at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Resolution|--- |FIXED
--- Comment #4 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Fixed on trunk.
^ permalink raw reply [flat|nested] 7+ messages in thread* [Bug fortran/67567] resolve.c: gfc_error called with iface->module == NULL
2015-09-14 6:11 [Bug fortran/67567] New: pretty-print.h sanitizer detects NULL pointer passed to obstack_grow zeccav at gmail dot com
` (3 preceding siblings ...)
2015-09-25 14:24 ` manu at gcc dot gnu.org
@ 2015-09-26 18:04 ` pault at gcc dot gnu.org
2015-09-26 18:11 ` paul.richard.thomas at gmail dot com
5 siblings, 0 replies; 7+ messages in thread
From: pault at gcc dot gnu.org @ 2015-09-26 18:04 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67567
Paul Thomas <pault at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #8 from Paul Thomas <pault at gcc dot gnu.org> ---
Dear Manuel,
It has been fixed. I would be grateful if you did not put comments like that in
the source code. The PR is quite sufficient!
Thanks for getting to the cause of this problem. Ultimately, it was due to a
change in the way that submodule files are named and was missed because the
testcase does not check the complete messages.
Cheers y muchas gracias!
Paul
^ permalink raw reply [flat|nested] 7+ messages in thread* [Bug fortran/67567] resolve.c: gfc_error called with iface->module == NULL
2015-09-14 6:11 [Bug fortran/67567] New: pretty-print.h sanitizer detects NULL pointer passed to obstack_grow zeccav at gmail dot com
` (4 preceding siblings ...)
2015-09-26 18:04 ` pault at gcc dot gnu.org
@ 2015-09-26 18:11 ` paul.richard.thomas at gmail dot com
5 siblings, 0 replies; 7+ messages in thread
From: paul.richard.thomas at gmail dot com @ 2015-09-26 18:11 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67567
--- Comment #9 from paul.richard.thomas at gmail dot com <paul.richard.thomas at gmail dot com> ---
Fixed as 'obvious' in revision: 228169.
Cheers
Paul
2013-09-26 Paul Thomas <pault@gcc.gnu.org>
PR fortran/67567
* resolve.c (resolve_fl_procedure): For module procedures, take
the parent module name and the submodule name from the name of
the namespace.
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