gdb中的PHP-FPM未知调用者回溯

2019年7月28日 214次阅读

我在我的php应用程序中调试了一个段错误,我使用–enable-debug选项编译了php,并且在段落错误期间php-fpm转储了核心后,我运行：

$gdb /usr/local/sbin/php-fpm core
GNU gdb (GDB) 7.12.1

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Reading symbols from /usr/local/sbin/php-fpm...(no debugging symbols found)...done.
[New LWP 2110]

warning: Can't read pathname for load map: No error information.
Core was generated by `php-fpm:'.
Program terminated with signal SIGBUS, Bus error.
#0  0x000055c27ba1f291 in ?? ()
(gdb) bt
#0  0x000055c27ba1f291 in ?? ()
#1  0x000055c27ba21bce in _efree ()
#2  0x000055c27ba6c8b2 in ?? ()
#3  0x000055c27ba70cee in zend_array_destroy ()
#4  0x000055c27ba56fbd in _zval_dtor_func ()
#5  0x000055c27ba6cce4 in ?? ()
#6  0x000055c27ba70cc8 in zend_array_destroy ()
#7  0x000055c27ba56fbd in _zval_dtor_func ()
#8  0x000055c27ba6cce4 in ?? ()
#9  0x000055c27ba70c8a in zend_array_destroy ()
#10 0x000055c27ba56fbd in _zval_dtor_func ()
#11 0x000055c27ba6cce4 in ?? ()
#12 0x000055c27ba70cc8 in zend_array_destroy ()
#13 0x000055c27ba56fbd in _zval_dtor_func ()
#14 0x000055c27ba44b75 in ?? ()
#15 0x000055c27ba450fe in zend_cleanup_user_class_data ()
#16 0x000055c27ba3f473 in ?? ()
#17 0x000055c27ba5971b in zend_deactivate ()
#18 0x000055c27b9bf1df in php_request_shutdown ()
#19 0x000055c27bb55015 in ?? ()
#20 0x00007f7fb743e964 in __libc_start_main () from /lib/ld-musl-x86_64.so.1
#21 0x0000000000000000 in ?? ()

我还将.gdbinit从php源文件放到带有核心文件的目录中,并将set auto-load safe-path /设置为〜/ .gdbinit(不知道它有多帮助).

你可以看到有??在回溯中根本没用.这应该是怎么回事？有没有办法让真正的来电者？

最佳答案

Is this how it should be?

没有.

Is there any way to get the real caller?

大概.

堆栈跟踪表明/usr/local/sbin / php-fpm已完全剥离(删除了符号表).您可以使用文件/usr/local/sbin / php-fpm进行确认.

make install完全剥离二进制文件的情况并不少见.您应该尝试使用“as built”二进制文件(而不是您现在正在执行的“已安装”)：gdb / path / to / build / tree / php-fpm core.

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