[Bug fortran/55636] New: [4.8 Regression] Fortran name mangling collides with user namespace

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* [Bug fortran/55636] New: [4.8 Regression] Fortran name mangling collides with user namespace
@ 2012-12-10  0:39 dje at gcc dot gnu.org
  2012-12-10  0:43 ` [Bug fortran/55636] " dje at gcc dot gnu.org
                   ` (7 more replies)
  0 siblings, 8 replies; 9+ messages in thread
From: dje at gcc dot gnu.org @ 2012-12-10  0:39 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55636

             Bug #: 55636
           Summary: [4.8 Regression] Fortran name mangling collides with
                    user namespace
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: critical
          Priority: P3
         Component: fortran
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: dje@gcc.gnu.org


As reported in early October, a patch added name mangling to some additional
symbols. The mangling is wrong for a number of reasons:

1) It conflicts with naming used in some systems (AIX)
2) It does not obey NO_DOT_IN_LABEL
3) It does not use identifiers reserved to the system

A proposal to use "_F" prefix instead of "." was proposed and discussed, but
there has been no progress.


^ permalink raw reply	[flat|nested] 9+ messages in thread

* [Bug fortran/55636] [4.8 Regression] Fortran name mangling collides with user namespace
  2012-12-10  0:39 [Bug fortran/55636] New: [4.8 Regression] Fortran name mangling collides with user namespace dje at gcc dot gnu.org
@ 2012-12-10  0:43 ` dje at gcc dot gnu.org
  2012-12-10  8:13 ` burnus at gcc dot gnu.org
                   ` (6 subsequent siblings)
  7 siblings, 0 replies; 9+ messages in thread
From: dje at gcc dot gnu.org @ 2012-12-10  0:43 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55636

David Edelsohn <dje at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |assemble-failure, build,
                   |                            |link-failure
                 CC|                            |burnus at gcc dot gnu.org,
                   |                            |janus at gcc dot gnu.org
   Target Milestone|---                         |4.8.0


^ permalink raw reply	[flat|nested] 9+ messages in thread

* [Bug fortran/55636] [4.8 Regression] Fortran name mangling collides with user namespace
  2012-12-10  0:39 [Bug fortran/55636] New: [4.8 Regression] Fortran name mangling collides with user namespace dje at gcc dot gnu.org
  2012-12-10  0:43 ` [Bug fortran/55636] " dje at gcc dot gnu.org
@ 2012-12-10  8:13 ` burnus at gcc dot gnu.org
  2012-12-10  8:38 ` rguenth at gcc dot gnu.org
                   ` (5 subsequent siblings)
  7 siblings, 0 replies; 9+ messages in thread
From: burnus at gcc dot gnu.org @ 2012-12-10  8:13 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55636

--- Comment #1 from Tobias Burnus <burnus at gcc dot gnu.org> 2012-12-10 08:12:39 UTC ---
See thread starting at http://gcc.gnu.org/ml/fortran/2012-10/msg00006.html


^ permalink raw reply	[flat|nested] 9+ messages in thread

* [Bug fortran/55636] [4.8 Regression] Fortran name mangling collides with user namespace
  2012-12-10  0:39 [Bug fortran/55636] New: [4.8 Regression] Fortran name mangling collides with user namespace dje at gcc dot gnu.org
  2012-12-10  0:43 ` [Bug fortran/55636] " dje at gcc dot gnu.org
  2012-12-10  8:13 ` burnus at gcc dot gnu.org
@ 2012-12-10  8:38 ` rguenth at gcc dot gnu.org
  2012-12-10  8:51 ` janus at gcc dot gnu.org
                   ` (4 subsequent siblings)
  7 siblings, 0 replies; 9+ messages in thread
From: rguenth at gcc dot gnu.org @ 2012-12-10  8:38 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55636

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P1
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2012-12-10
     Ever Confirmed|0                           |1

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> 2012-12-10 08:38:08 UTC ---
P1 as it is a build failure.


^ permalink raw reply	[flat|nested] 9+ messages in thread

* [Bug fortran/55636] [4.8 Regression] Fortran name mangling collides with user namespace
  2012-12-10  0:39 [Bug fortran/55636] New: [4.8 Regression] Fortran name mangling collides with user namespace dje at gcc dot gnu.org
                   ` (2 preceding siblings ...)
  2012-12-10  8:38 ` rguenth at gcc dot gnu.org
@ 2012-12-10  8:51 ` janus at gcc dot gnu.org
  2012-12-10  9:39 ` jakub at gcc dot gnu.org
                   ` (3 subsequent siblings)
  7 siblings, 0 replies; 9+ messages in thread
From: janus at gcc dot gnu.org @ 2012-12-10  8:51 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55636

--- Comment #3 from janus at gcc dot gnu.org 2012-12-10 08:51:19 UTC ---
A patch was posted here:

http://gcc.gnu.org/ml/fortran/2012-10/msg00028.html


^ permalink raw reply	[flat|nested] 9+ messages in thread

* [Bug fortran/55636] [4.8 Regression] Fortran name mangling collides with user namespace
  2012-12-10  0:39 [Bug fortran/55636] New: [4.8 Regression] Fortran name mangling collides with user namespace dje at gcc dot gnu.org
                   ` (3 preceding siblings ...)
  2012-12-10  8:51 ` janus at gcc dot gnu.org
@ 2012-12-10  9:39 ` jakub at gcc dot gnu.org
  2012-12-11 11:22 ` janus at gcc dot gnu.org
                   ` (2 subsequent siblings)
  7 siblings, 0 replies; 9+ messages in thread
From: jakub at gcc dot gnu.org @ 2012-12-10  9:39 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55636

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-12-10 09:39:31 UTC ---
It could use something similar to what tree-emutls.c uses:
+#if !defined (NO_DOT_IN_LABEL)
+# define GFC_STRING_LENGTH_SEPARATOR       "."
+#elif !defined (NO_DOLLAR_IN_LABEL)
+# define GFC_STRING_LENGTH_SEPARATOR       "$"
+#else
+# define GFC_STRING_LENGTH_SEPARATOR       "_"
+#endif

-      if (sym->module)
+      if (sym->attr.save || sym->ns->proc_name->attr.flavor == FL_MODULE)
+        {
+          if (sym->module)
+            name = gfc_get_string ("_F" GFC_STRING_LENGTH_SEPARATOR
"%s_MOD_%s", sym->module, sym->name);
+          else
+            name = gfc_get_string ("_F" GFC_STRING_LENGTH_SEPARATOR "%s",
sym->name);
+        }
+      else if (sym->module)


^ permalink raw reply	[flat|nested] 9+ messages in thread

* [Bug fortran/55636] [4.8 Regression] Fortran name mangling collides with user namespace
  2012-12-10  0:39 [Bug fortran/55636] New: [4.8 Regression] Fortran name mangling collides with user namespace dje at gcc dot gnu.org
                   ` (4 preceding siblings ...)
  2012-12-10  9:39 ` jakub at gcc dot gnu.org
@ 2012-12-11 11:22 ` janus at gcc dot gnu.org
  2012-12-19  9:21 ` burnus at gcc dot gnu.org
  2012-12-19  9:28 ` burnus at gcc dot gnu.org
  7 siblings, 0 replies; 9+ messages in thread
From: janus at gcc dot gnu.org @ 2012-12-11 11:22 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55636

--- Comment #5 from janus at gcc dot gnu.org 2012-12-11 11:22:15 UTC ---
For completeness: The regression was apparently introduced by the following
revision ...

http://gcc.gnu.org/viewcvs?view=revision&revision=187472


Btw, how is it a build failure?


^ permalink raw reply	[flat|nested] 9+ messages in thread

* [Bug fortran/55636] [4.8 Regression] Fortran name mangling collides with user namespace
  2012-12-10  0:39 [Bug fortran/55636] New: [4.8 Regression] Fortran name mangling collides with user namespace dje at gcc dot gnu.org
                   ` (5 preceding siblings ...)
  2012-12-11 11:22 ` janus at gcc dot gnu.org
@ 2012-12-19  9:21 ` burnus at gcc dot gnu.org
  2012-12-19  9:28 ` burnus at gcc dot gnu.org
  7 siblings, 0 replies; 9+ messages in thread
From: burnus at gcc dot gnu.org @ 2012-12-19  9:21 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55636

--- Comment #6 from Tobias Burnus <burnus at gcc dot gnu.org> 2012-12-19 09:21:21 UTC ---
Author: burnus
Date: Wed Dec 19 09:21:17 2012
New Revision: 194604

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=194604
Log:
2012-12-19  Tobias Burnus  <burnus@net-b.de>
            Jakub Jelinek  <jakub@redhat.com>
            Janus Weil  <janus@gcc.gnu.org>

        PR fortran/55636
        PR fortran/55733
        * gfortran.h (GFC_PREFIX): Define.
        * trans-decl.c (gfc_create_string_length): For VAR_DECLs that
        will be TREE_STATIC, use GFC_PREFIX to mangle the names. Handle
        -fno-automatic
        (gfc_trans_deferred_vars): Don't free variables SAVEd via
        -fno-automatic.

2012-12-19  Tobias Burnus  <burnus@net-b.de>

        PR fortran/55733
        * gfortran.dg/save_5.f90: New.


Added:
    trunk/gcc/testsuite/gfortran.dg/save_5.f90
Modified:
    trunk/gcc/fortran/ChangeLog
    trunk/gcc/fortran/gfortran.h
    trunk/gcc/fortran/trans-decl.c
    trunk/gcc/testsuite/ChangeLog


^ permalink raw reply	[flat|nested] 9+ messages in thread

* [Bug fortran/55636] [4.8 Regression] Fortran name mangling collides with user namespace
  2012-12-10  0:39 [Bug fortran/55636] New: [4.8 Regression] Fortran name mangling collides with user namespace dje at gcc dot gnu.org
                   ` (6 preceding siblings ...)
  2012-12-19  9:21 ` burnus at gcc dot gnu.org
@ 2012-12-19  9:28 ` burnus at gcc dot gnu.org
  7 siblings, 0 replies; 9+ messages in thread
From: burnus at gcc dot gnu.org @ 2012-12-19  9:28 UTC (permalink / raw)
  To: gcc-bugs


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55636

Tobias Burnus <burnus at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

--- Comment #7 from Tobias Burnus <burnus at gcc dot gnu.org> 2012-12-19 09:28:12 UTC ---
FIXED on the trunk (4.8).

The mangling now uses:

#if !defined (NO_DOT_IN_LABEL)
# define GFC_PREFIX(x) "_F." x
#elif !defined (NO_DOLLAR_IN_LABEL)
# define GFC_PREFIX(x) "_F$" x
#else
# define GFC_PREFIX(x) "_F_" x
#endif


^ permalink raw reply	[flat|nested] 9+ messages in thread

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2012-12-10  0:39 [Bug fortran/55636] New: [4.8 Regression] Fortran name mangling collides with user namespace dje at gcc dot gnu.org
2012-12-10  0:43 ` [Bug fortran/55636] " dje at gcc dot gnu.org
2012-12-10  8:13 ` burnus at gcc dot gnu.org
2012-12-10  8:38 ` rguenth at gcc dot gnu.org
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2012-12-11 11:22 ` janus at gcc dot gnu.org
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