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* [Bug c/53163] New: crash due to null ptr deref
@ 2012-04-30 5:09 regehr at cs dot utah.edu
2012-04-30 7:03 ` [Bug tree-optimization/53163] [4.7/4.8 Regression] " jakub at gcc dot gnu.org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: regehr at cs dot utah.edu @ 2012-04-30 5:09 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53163
Bug #: 53163
Summary: crash due to null ptr deref
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: regehr@cs.utah.edu
CC: chenyang@cs.utah.edu
[regehr@dyson r43]$ current-gcc -c -O3 small.c
small.c: In function 'fn2':
small.c:22:1: internal compiler error: Segmentation fault
fn2 ()
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
[regehr@dyson r43]$ cat small.c
struct
{
int f0;
} b, f;
int a, c;
void
fn1 ()
{
int d, e;
d = 4;
for (; d < 19; ++d)
{
e = 2;
for (; e >= 0; e--)
{
a = 0;
a = 1;
}
}
}
void
fn2 ()
{
int g, h, i;
i = 1;
for (; i >= 0; i--)
{
b = f;
g = 0;
for (; g <= 1; g++)
{
if (c)
break;
h = 0;
for (; h <= 1; h++)
fn1 ();
fn1 ();
}
}
}
[regehr@dyson r43]$ current-gcc -v
Using built-in specs.
COLLECT_GCC=current-gcc
COLLECT_LTO_WRAPPER=/uusoc/exports/scratch/regehr/z/compiler-install/gcc-r186946-install/bin/../libexec/gcc/x86_64-unknown-linux-gnu/4.8.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../configure --with-libelf=/usr/local --enable-lto
--prefix=/home/regehr/z/compiler-install/gcc-r186946-install
--program-prefix=r186946- --enable-languages=c,c++
Thread model: posix
gcc version 4.8.0 20120429 (experimental) (GCC)
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug tree-optimization/53163] [4.7/4.8 Regression] crash due to null ptr deref 2012-04-30 5:09 [Bug c/53163] New: crash due to null ptr deref regehr at cs dot utah.edu @ 2012-04-30 7:03 ` jakub at gcc dot gnu.org 2012-04-30 7:25 ` jakub at gcc dot gnu.org ` (3 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: jakub at gcc dot gnu.org @ 2012-04-30 7:03 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53163 Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |ASSIGNED Last reconfirmed| |2012-04-30 Component|c |tree-optimization CC| |jakub at gcc dot gnu.org AssignedTo|unassigned at gcc dot |jakub at gcc dot gnu.org |gnu.org | Ever Confirmed|0 |1 Summary|crash due to null ptr deref |[4.7/4.8 Regression] crash | |due to null ptr deref Target Milestone|--- |4.7.1 --- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-04-30 07:01:55 UTC --- Started with http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=183624 I think the bug is that cond_if_else_store_replacement is ignoring return value from compute_all_dependences. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/53163] [4.7/4.8 Regression] crash due to null ptr deref 2012-04-30 5:09 [Bug c/53163] New: crash due to null ptr deref regehr at cs dot utah.edu 2012-04-30 7:03 ` [Bug tree-optimization/53163] [4.7/4.8 Regression] " jakub at gcc dot gnu.org @ 2012-04-30 7:25 ` jakub at gcc dot gnu.org 2012-05-02 9:55 ` jakub at gcc dot gnu.org ` (2 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: jakub at gcc dot gnu.org @ 2012-04-30 7:25 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53163 --- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-04-30 07:24:44 UTC --- Created attachment 27264 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27264 gcc48-pr53163.patch Untested fix. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/53163] [4.7/4.8 Regression] crash due to null ptr deref 2012-04-30 5:09 [Bug c/53163] New: crash due to null ptr deref regehr at cs dot utah.edu 2012-04-30 7:03 ` [Bug tree-optimization/53163] [4.7/4.8 Regression] " jakub at gcc dot gnu.org 2012-04-30 7:25 ` jakub at gcc dot gnu.org @ 2012-05-02 9:55 ` jakub at gcc dot gnu.org 2012-05-02 9:57 ` jakub at gcc dot gnu.org 2012-05-02 10:24 ` jakub at gcc dot gnu.org 4 siblings, 0 replies; 6+ messages in thread From: jakub at gcc dot gnu.org @ 2012-05-02 9:55 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53163 --- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-05-02 09:55:36 UTC --- Author: jakub Date: Wed May 2 09:55:32 2012 New Revision: 187038 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=187038 Log: PR tree-optimization/53163 * tree-ssa-phiopt.c (cond_if_else_store_replacement): Don't ignore return value from compute_all_dependences. * gcc.c-torture/compile/pr53163.c: New test. Added: trunk/gcc/testsuite/gcc.c-torture/compile/pr53163.c Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/ChangeLog trunk/gcc/tree-ssa-phiopt.c ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/53163] [4.7/4.8 Regression] crash due to null ptr deref 2012-04-30 5:09 [Bug c/53163] New: crash due to null ptr deref regehr at cs dot utah.edu ` (2 preceding siblings ...) 2012-05-02 9:55 ` jakub at gcc dot gnu.org @ 2012-05-02 9:57 ` jakub at gcc dot gnu.org 2012-05-02 10:24 ` jakub at gcc dot gnu.org 4 siblings, 0 replies; 6+ messages in thread From: jakub at gcc dot gnu.org @ 2012-05-02 9:57 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53163 --- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-05-02 09:56:43 UTC --- Author: jakub Date: Wed May 2 09:56:39 2012 New Revision: 187039 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=187039 Log: PR tree-optimization/53163 * tree-ssa-phiopt.c (cond_if_else_store_replacement): Don't ignore return value from compute_all_dependences. * gcc.c-torture/compile/pr53163.c: New test. Added: branches/gcc-4_7-branch/gcc/testsuite/gcc.c-torture/compile/pr53163.c Modified: branches/gcc-4_7-branch/gcc/ChangeLog branches/gcc-4_7-branch/gcc/testsuite/ChangeLog branches/gcc-4_7-branch/gcc/tree-ssa-phiopt.c ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/53163] [4.7/4.8 Regression] crash due to null ptr deref 2012-04-30 5:09 [Bug c/53163] New: crash due to null ptr deref regehr at cs dot utah.edu ` (3 preceding siblings ...) 2012-05-02 9:57 ` jakub at gcc dot gnu.org @ 2012-05-02 10:24 ` jakub at gcc dot gnu.org 4 siblings, 0 replies; 6+ messages in thread From: jakub at gcc dot gnu.org @ 2012-05-02 10:24 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53163 Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution| |FIXED --- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-05-02 10:23:54 UTC --- Fixed. ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2012-05-02 10:24 UTC | newest] Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2012-04-30 5:09 [Bug c/53163] New: crash due to null ptr deref regehr at cs dot utah.edu 2012-04-30 7:03 ` [Bug tree-optimization/53163] [4.7/4.8 Regression] " jakub at gcc dot gnu.org 2012-04-30 7:25 ` jakub at gcc dot gnu.org 2012-05-02 9:55 ` jakub at gcc dot gnu.org 2012-05-02 9:57 ` jakub at gcc dot gnu.org 2012-05-02 10:24 ` jakub at gcc dot gnu.org
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