内存开大以后会遇到 signal 11 about yac HOT 12 CLOSED

== ProcStatus =================================
Name:   php5-fpm
State:  S (sleeping)
Tgid:   20733
Pid:    20733
PPid:   20578
TracerPid:      0
Uid:    33      33      33      33
Gid:    33      33      33      33
FDSize: 512
Groups: 33
VmPeak:  1530832 kB
VmSize:  1509568 kB
VmLck:         0 kB
VmPin:         0 kB
VmHWM:     74692 kB
VmRSS:     71464 kB
VmData:    83828 kB
VmStk:       136 kB
VmExe:      7168 kB
VmLib:     30120 kB
VmPTE:       756 kB
VmSwap:        0 kB
Threads:        1

...
7f42a15df000-7f42a15e9000 r-xp 00000000 fc:00 2490924                    /usr/lib/php5/20100525/yac.so
7f42a15e9000-7f42a17e8000 ---p 0000a000 fc:00 2490924                    /usr/lib/php5/20100525/yac.so
7f42a17e8000-7f42a17e9000 r--p 00009000 fc:00 2490924                    /usr/lib/php5/20100525/yac.so
7f42a17e9000-7f42a17ea000 rw-p 0000a000 fc:00 2490924                    /usr/lib/php5/20100525/yac.so
...
7fff90468000-7fff90489000 rw-p 00000000 00:00 0                          [stack]

...


== SegvAnalysis =================================
Segfault happened at: 0x7f42a15e4995:   Cannot access memory at address 0x7f42a15e4995
PC (0x7f42a15e4995) ok
SP (0x7fff90481da0) ok
Reason could not be automatically determined.

== Signal =================================
11

== SourcePackage =================================
php5

== Stacktrace =================================
#0  0x00007f42a15e4995 in ?? ()
No symbol table info available.
Cannot access memory at address 0x7fff90481da0

== StacktraceTop =================================
?? ()

== Tags =================================
precise

== ThreadStacktrace =================================
.
Thread 1 (LWP 20733):
#0  0x00007f42a15e4995 in ?? ()
No symbol table info available.
Cannot access memory at address 0x7fff90481da0

== Title =================================
php5-fpm crashed with SIGSEGV

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `php a.php'.
Program terminated with signal 11, Segmentation fault.
#0  0x00007fb3cc9baef8 in yac_storage_update () from /usr/lib/php5/20100525/yac.so

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `php a.php'.
Program terminated with signal 11, Segmentation fault.
#0  0x00007f23ccc5cef8 in yac_storage_update () from /usr/lib/php5/20100525/yac.so
(gdb) backtrace
#0  0x00007f23ccc5cef8 in yac_storage_update () from /usr/lib/php5/20100525/yac.so
#1  0x00007f23ccc5a6f8 in yac_add_impl () from /usr/lib/php5/20100525/yac.so
#2  0x00007f23ccc5b4ea in zim_yac_set () from /usr/lib/php5/20100525/yac.so
#3  0x00000000007601d2 in ?? ()
#4  0x0000000000719a17 in execute ()
#5  0x00000000006b984c in zend_execute_scripts ()
#6  0x0000000000658c53 in php_execute_script ()
#7  0x0000000000762803 in ?? ()
#8  0x000000000042c420 in ?? ()
#9  0x00007f23cd9c176d in __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6
#10 0x000000000042c4b5 in _start ()

<?php
$yac = new Yac();
$i = 0;
while (true) {
  $yac->set(rand(), rand(), 2);
  $i++;
  if ($i > 20000) {
    break;
  }
}

phpize
./configure
sudo make