https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78886
Bug ID: 78886
Summary: gcc Segmentation fault malloc and volatile
Product: gcc
Version: 6.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: prekgeo at yahoo dot com
Target Milestone: ---
Created attachment 40388
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40388&action=edit
test case
$ ./configure --disable-multilib --enable-languages=c --prefix=/home/prekas/gcc
$ uname -a
Linux sciicebpc1 4.4.0-38-generic #57-Ubuntu SMP Tue Sep 6 15:42:33 UTC 2016
x86_64 x86_64 x86_64 GNU/Linux
$ ../gcc/bin/gcc -v -save-temps -S -O2 gcc_bug.c
Using built-in specs.
COLLECT_GCC=../gcc/bin/gcc
Target: x86_64-pc-linux-gnu
Configured with: ./configure --disable-multilib --enable-languages=c
Thread model: posix
gcc version 6.3.0 (GCC)
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-S' '-O2' '-mtune=generic'
'-march=x86-64'
/home/prekas/gcc/bin/../libexec/gcc/x86_64-pc-linux-gnu/6.3.0/cc1 -E -quiet -v
-imultiarch x86_64-linux-gnu -iprefix
/home/prekas/gcc/bin/../lib/gcc/x86_64-pc-linux-gnu/6.3.0/ gcc_bug.c
-mtune=generic -march=x86-64 -O2 -fpch-preprocess -o gcc_bug.i
ignoring nonexistent directory
"/home/prekas/gcc/bin/../lib/gcc/x86_64-pc-linux-gnu/6.3.0/../../../../x86_64-pc-linux-gnu/include"
ignoring duplicate directory
"/home/prekas/gcc/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/6.3.0/include"
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring duplicate directory
"/home/prekas/gcc/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/6.3.0/include-fixed"
ignoring nonexistent directory
"/home/prekas/gcc/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/6.3.0/../../../../x86_64-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/home/prekas/gcc/bin/../lib/gcc/x86_64-pc-linux-gnu/6.3.0/include
/home/prekas/gcc/bin/../lib/gcc/x86_64-pc-linux-gnu/6.3.0/include-fixed
/usr/local/include
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-S' '-O2' '-mtune=generic'
'-march=x86-64'
/home/prekas/gcc/bin/../libexec/gcc/x86_64-pc-linux-gnu/6.3.0/cc1
-fpreprocessed gcc_bug.i -quiet -dumpbase gcc_bug.c -mtune=generic
-march=x86-64 -auxbase gcc_bug -O2 -version -o gcc_bug.s
GNU C11 (GCC) version 6.3.0 (x86_64-pc-linux-gnu)
compiled by GNU C version 6.3.0, GMP version 6.1.0, MPFR version 3.1.4,
MPC version 1.0.3, isl version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C11 (GCC) version 6.3.0 (x86_64-pc-linux-gnu)
compiled by GNU C version 6.3.0, GMP version 6.1.0, MPFR version 3.1.4,
MPC version 1.0.3, isl version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: aac98bc8a6db7b45e88f65faa8c8f64b
gcc_bug.c: In function 'foo':
gcc_bug.c:3:6: internal compiler error: Segmentation fault
void foo(void)
^~~
0x9c5cdf crash_signal
../.././gcc/toplev.c:333
0xb131f1 get_stridx
../.././gcc/tree-ssa-strlen.c:195
0xb14e8e handle_builtin_malloc
../.././gcc/tree-ssa-strlen.c:1837
0xb14e8e strlen_optimize_stmt
../.././gcc/tree-ssa-strlen.c:2156
0xb14e8e strlen_dom_walker::before_dom_children(basic_block_def*)
../.././gcc/tree-ssa-strlen.c:2339
0xf4ace2 dom_walker::walk(basic_block_def*)
../.././gcc/domwalk.c:265
0xb12b0f execute
../.././gcc/tree-ssa-strlen.c:2411
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
