Press "Enter" to skip to content

深入理解PHP内存管理之一个低概率Core的分析

一个同事forward过来一个, 公司某产品线遇到的一个低概率, 但长时间出现了几次的Core的bt信息, 找我帮忙分析下原因.

bt栈如下(路径信息以*代替):

#0  0x00000000004a75e5 in _zend_mm_alloc_int (heap=0xd61260, size=79)
at /*/php-5.2.6/Zend/zend_alloc.c:1879
#1  0x000000000048d3cd in vspprintf (pbuf=0x7fbffe9cd8, max_len=1024, format=Variable "format" is not available.
)
    at /*/php-5.2.6/main/spprintf.c:224
#2  0x0000000000489747 in php_error_cb (type=1, error_filename=0x2a9a787ee8 "/*/application/helpers/util.php",
    error_lineno=1149, format=Variable "format" is not available.
) at /*/php-5.2.6/main/main.c:799
#3  0x000000000061db35 in soap_error_handler (error_num=1,
    error_filename=0x2a9a787ee8 "/*/application/helpers/util.php", error_lineno=1149,
    format=0x7b9cb8 "Maximum execution time of %d second%s exceeded", args=0x7fbffea3b0)
    at /*/php-5.2.6/ext/soap/soap.c:2178
#4  0x00000000004c2576 in zend_error (type=1, format=0x7b9cb8 "Maximum execution time of %d second%s exceeded")
    at /*/php-5.2.6/Zend/zend.c:976
#5  <signal handler called>
#6  0x00000000004a720f in _zend_mm_free_int (heap=0xd61260, p=Variable "p" is not available.
) at /*/php-5.2.6/Zend/zend_alloc.c:844

...以下省略

Filed in PHP应用, PHP源码分析
with 12 Comments

一个低概率的PHP Core dump

PHP是个脚本语言, 错误定位容易, 编写起来速度较快..但是, 如果遇到了PHP自身的一些问题,那就会让人很恼火.
最近遇到一个很低概率的Core dump(大概是2年才出现一次), 经过和同事一起仔细分析,跟踪,终于找出了原因, 拿出来与大家分享.

Filed in PHP应用, PHP源码分析
with 8 Comments