[Bug c/26865] New: Segmentation fault with -std=c99 -O1 on genksyms.c

[Bug c/26865] New: Segmentation fault with -std=c99 -O1 on genksyms.c

[flash at pobox dot com]

The attached preprocessed files, 122593_genksyms_min.i and its Delta-reduction
122593_genksyms_min.i, cause a segfault for checking=all builds of GCC 4.1.0 on
both Ubuntu 5.04 and OSX 10.4.5 with -std=c99 and -O1.  The original .c and .h
files from the Linux kernel distribution (which I'll also attach) crash on
Ubuntu but not OSX.  Ubuntu issues warnings before crashing, whereas OSX
compiles cleanly, which suggests a header problem.  A checking=all build of
4.0.2 compiles all three versions of the file with warnings but no error, as
does a checking build of GCC 3.4.3; so this is a regression.  

Here's the session:

48> /opt/gcc410-chk-all/bin/gcc -v  -std=c99 -O1
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i
Using built-in specs.
Target: powerpc-apple-darwin8.5.0
Configured with: /opt/Gcc-4.1.0-dist/configure --enable-checking=all
--prefix=/opt/gcc410-chk-all --enable-languages=c,c++ --with-comment=PalmSource
checking=all build by Flash Sheridan 3/17/06
Thread model: posix
gcc version 4.1.0
 /opt/gcc410-chk-all/libexec/gcc/powerpc-apple-darwin8.5.0/4.1.0/cc1
-fpreprocessed ../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i -fPIC
-quiet -dumpbase 122593_genksyms_min.i -auxbase 122593_genksyms_min -O1
-std=c99 -version -o /var/tmp//cc4PRuEJ.s
GNU C version 4.1.0 (powerpc-apple-darwin8.5.0)
        compiled by GNU C version 4.0.1 (Apple Computer, Inc. build 5247).
GGC heuristics: --param ggc-min-expand=0 --param ggc-min-heapsize=0
Compiler executable checksum: 1116648296470812f723ca4bff2463c0
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i:60: warning: return
type defaults to 'int'
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i:63: warning: return
type defaults to 'int'
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i:66: warning: return
type defaults to 'int'
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i:69: warning: return
type defaults to 'int'
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i:72: warning: return
type defaults to 'int'
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i: In function
'add_symbol':
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i:74: warning: implicit
declaration of function 'map_to_ns'
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i:75: warning: implicit
declaration of function 'strlen'
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i:75: warning:
incompatible implicit declaration of built-in function 'strlen'
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i:75: warning: implicit
declaration of function 'memcmp'
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i:75: warning: implicit
declaration of function 'strcmp'
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i: At top level:
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i:80: warning: return
type defaults to 'int'
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i:83: warning: return
type defaults to 'int'
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i:86: warning: return
type defaults to 'int'
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i:91: warning: return
type defaults to 'int'
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i:96: warning: return
type defaults to 'int'
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i: In function
'print_list':
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i:101: warning: implicit
declaration of function 'alloca'
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i:101: warning:
assignment makes pointer from integer without a cast
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i: At top level:
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i:106: warning: return
type defaults to 'int'
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i: In function
'expand_and_crc_list':
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i:111: warning: implicit
declaration of function 'error_with_pos'
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i: At top level:
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i:120: warning: return
type defaults to 'int'
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i:125: warning: return
type defaults to 'int'
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i:129: warning:
conflicting types for 'error_with_pos'
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i:111: warning: previous
implicit declaration of 'error_with_pos' was here
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i: In function
'genksyms_usage':
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i:138: warning: implicit
declaration of function 'fprintf'
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i:138: warning:
incompatible implicit declaration of built-in function 'fprintf'
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i: In function
'print_list':
../cpp/bugfiles/GCC_bugfiles/error/122593_genksyms_min.i:96: internal compiler
error: Bus error
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.



---
PalmSource bug 122593
http://pobox.com/~flash
Quality Lead for Compilers and Debuggers
PalmSource, Inc. Tools Quality Management


-- 
           Summary: Segmentation fault with -std=c99 -O1 on genksyms.c
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: flash at pobox dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26865

[Bug c/26865] Segmentation fault with -std=c99 -O1 on genksyms.c

[flash at pobox dot com]

------- Comment #1 from flash at pobox dot com  2006-03-25 05:56 -------
Created an attachment (id=11120)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=11120&action=view)
Preprocessed Delta-reduced source file


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26865

[Bug c/26865] Segmentation fault with -std=c99 -O1 on genksyms.c

[flash at pobox dot com]

------- Comment #2 from flash at pobox dot com  2006-03-25 05:56 -------
Created an attachment (id=11121)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=11121&action=view)
Pre-processed source


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26865

[Bug c/26865] Segmentation fault with -std=c99 -O1 on genksyms.c

[flash at pobox dot com]

------- Comment #3 from flash at pobox dot com  2006-03-25 05:57 -------
Created an attachment (id=11122)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=11122&action=view)
Original source


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26865

[Bug c/26865] Segmentation fault with -std=c99 -O1 on genksyms.c

[flash at pobox dot com]

------- Comment #4 from flash at pobox dot com  2006-03-25 05:57 -------
Created an attachment (id=11123)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=11123&action=view)
Original header


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26865

[Bug tree-optimization/26865] [4.1 Regression] Segmentation fault with -std=c99 -O1 on genksyms.c

[pinskia at gcc dot gnu dot org]

------- Comment #5 from pinskia at gcc dot gnu dot org  2006-03-25 07:24 -------
Backtrace:
#0  0x00000000006fa7ae in find_func_aliases (t=0x2aaaab1483c0, ai=0xb1d9b0)
    at /home/pinskia/src/gcc-4.1/gcc/gcc/tree-ssa-structalias.c:2932
#1  0x00000000006fad8e in compute_points_to_sets (ai=0xb1d9b0)
    at /home/pinskia/src/gcc-4.1/gcc/gcc/tree-ssa-structalias.c:3742
#2  0x000000000047c74e in compute_may_aliases () at
/home/pinskia/src/gcc-4.1/gcc/gcc/tree-ssa-alias.c:263
#3  0x00000000006e5c66 in execute_one_pass (pass=0xa319a0)
    at /home/pinskia/src/gcc-4.1/gcc/gcc/passes.c:827
#4  0x00000000006e5d5c in execute_pass_list (pass=0xa319a0)
    at /home/pinskia/src/gcc-4.1/gcc/gcc/passes.c:859


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pinskia at gcc dot gnu dot
                   |                            |org
          Component|c                           |tree-optimization
           Keywords|                            |ice-on-valid-code
      Known to fail|                            |4.1.0 4.2.0
      Known to work|                            |4.2.0 4.0.3
            Summary|Segmentation fault with -   |[4.1 Regression]
                   |std=c99 -O1 on genksyms.c   |Segmentation fault with -
                   |                            |std=c99 -O1 on genksyms.c
   Target Milestone|---                         |4.1.1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26865

[Bug tree-optimization/26865] [4.1 Regression] Segmentation fault with -std=c99 -O1 on genksyms.c

[pinskia at gcc dot gnu dot org]

------- Comment #6 from pinskia at gcc dot gnu dot org  2006-03-25 22:09 -------
Reduced testcase:
void print_list(void)
{
  char *e;
  e = alloca(100);
}

-----
I wonder if alloca being turned off as a builtin is causing this.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2006-03-25 22:09:10
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26865

[Bug tree-optimization/26865] [4.1 Regression] Segmentation fault with -std=c99 -O1 and alloca()

[mmitchel at gcc dot gnu dot org]

-- 

mmitchel at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26865

[Bug tree-optimization/26865] [4.1 Regression] Segmentation fault with -std=c99 -O1 and alloca()

[jakub at gcc dot gnu dot org]

-- 

jakub at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |jakub at gcc dot gnu dot org
                   |dot org                     |
                URL|                            |http://gcc.gnu.org/ml/gcc-
                   |                            |patches/2006-
                   |                            |04/msg00705.html
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2006-03-25 22:09:10         |2006-04-19 16:23:41
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26865

[Bug tree-optimization/26865] [4.1 Regression] Segmentation fault with -std=c99 -O1 and alloca()

[dtemirbulatov at gmail dot com]

------- Comment #7 from dtemirbulatov at gmail dot com  2006-04-19 23:25 -------
this bug could be fixed my backporting this patch:

2005-12-11  Daniel Berlin  <dberlin@dberlin.org>

       * timevar.def (TV_IPA_PTA): New.
       * tree-pass.h (pass_ipa_pta): New
       * tree-ssa-structalias.c: Include cgraph.h


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26865

[Bug tree-optimization/26865] [4.1 Regression] Segmentation fault with -std=c99 -O1 and alloca()

[jakub at gcc dot gnu dot org]

------- Comment #8 from jakub at gcc dot gnu dot org  2006-04-25 09:42 -------
Subject: Bug 26865

Author: jakub
Date: Tue Apr 25 09:42:41 2006
New Revision: 113242

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=113242
Log:
        PR tree-optimization/26865
        * gcc.dg/pr26865.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/pr26865.c
Modified:
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26865

[Bug tree-optimization/26865] [4.1 Regression] Segmentation fault with -std=c99 -O1 and alloca()

[jakub at gcc dot gnu dot org]

------- Comment #9 from jakub at gcc dot gnu dot org  2006-04-25 09:45 -------
Subject: Bug 26865

Author: jakub
Date: Tue Apr 25 09:45:01 2006
New Revision: 113243

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=113243
Log:
        PR tree-optimization/26865
        * tree-ssa-structalias.c (find_func_aliases): Check that anyoffsetrhs
        type is pointer or array type.

        * gcc.dg/pr26865.c: New test.

Added:
    branches/gcc-4_1-branch/gcc/testsuite/gcc.dg/pr26865.c
Modified:
    branches/gcc-4_1-branch/gcc/ChangeLog
    branches/gcc-4_1-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_1-branch/gcc/tree-ssa-structalias.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26865

[Bug tree-optimization/26865] [4.1 Regression] Segmentation fault with -std=c99 -O1 and alloca()

[reichelt at gcc dot gnu dot org]

------- Comment #10 from reichelt at gcc dot gnu dot org  2006-04-26 13:40 -------
Fixed on mainline and 4.1 branch.


-- 

reichelt at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26865