gdbを使ってphpをデバッグする方法を教えます!

gdb：启动之后用attach pid 追踪程序 gdb [options] [executable-file [core-file or process-id]] gdb [options] --args executable-file [inferior-arguments ...] gdb [options] [--python|-P] script-file [script-arguments ...]

Layout names are: src : Displays source and command windows. 显示源码 asm : Displays disassembly and command windows. 显示汇编指令 split : Displays source, disassembly and command windows. 显示源码和汇编指令 regs : Displays register window. If existing layout is source/command or assembly/command, the register window is displayed. If the source/assembly/command (split) is displayed, the register window is displayed with the window that has current logical focus

         

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pm = static pm.max_children = 1

[root@test ~]# ps aux|grep php-fpm www 1127 0.0 0.1 279352 2816 ? S 5月12 0:00 php-fpm: pool www root 12224 0.0 0.0 112736 976 pts/0 S+ 17:37 0:00 grep --color=auto php-fpm

[root@test ~]# gdb GNU gdb (GDB) Red Hat Enterprise Linux 7.6.1-115.el7 Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later  This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-redhat-linux-gnu". For bug reporting instructions, please see: . (gdb) attach 1127 Attaching to process 1127 Reading symbols from /usr/local/php/sbin/php-fpm...done. Reading symbols from /usr/lib64/libcrypt.so.1...Reading symbols from /usr/lib/debug/usr/lib64/libcrypt-2.17.so.debug...done. done.

(gdb) b timelib_update_ts Breakpoint 1 at 0x48ba90: file /opt/lnmp1.6/src/php-7.3.11/ext/date/lib/tm2unixtime.c, line 499.

(gdb) b do_years `Breakpoint 3 at 0x48bb95: file /opt/lnmp1.6/src/php-7.3.11/ext/date/lib/tm2unixtime.c, line 381.`

[root@test ~]# curl localhost/3.php

(gdb) c Continuing. Breakpoint 1, timelib_update_ts (time=time@entry=0x7fc63ec02000, tzi=tzi@entry=0x7fc63ec75000) at /opt/lnmp1.6/src/php-7.3.11/ext/date/lib/tm2unixtime.c:499 499 { (gdb) c Continuing. Breakpoint 3, timelib_update_ts (time=time@entry=0x7fc63ec02000, tzi=tzi@entry=0x7fc63ec75000) at /opt/lnmp1.6/src/php-7.3.11/ext/date/lib/tm2unixtime.c:505 505 res += do_years(time->y); (gdb) s do_years (year=2020) at /opt/lnmp1.6/src/php-7.3.11/ext/date/lib/tm2unixtime.c:381 381 eras = (year - 1970) / 40000; (gdb) s timelib_update_ts (time=time@entry=0x7fc63ec02000, tzi=tzi@entry=0x7fc63ec75000) at /opt/lnmp1.6/src/php-7.3.11/ext/date/lib/tm2unixtime.c:504 504 do_adjust_special(time); (gdb) p *time $1 = {y = 2020, m = 7, d = 31, h = 0, i = 0, s = 0, us = 0, z = 28800, tz_abbr = 0x7fc63ec71018 "CST", tz_info = 0x7fc63ec75000, dst = 0, relative = {y = 0, m = 2, d = 0, h = 0, i = 0, s = 0, us = 0, weekday = 0, weekday_behavior = 0, first_last_day_of = 2, invert = 0, days = -99999, special = {type = 0, amount = 0}, have_weekday_relative = 0, have_special_relative = 0}, sse = 0, have_time = 0, have_date = 0, have_zone = 0, have_relative = 1, have_weeknr_day = 0, sse_uptodate = 0, tim_uptodate = 0, is_localtime = 1, zone_type = 3} (gdb)

static timelib_sll do_years(timelib_sll year) { timelib_sll i; timelib_sll res = 0; timelib_sll eras; eras = (year - 1970) / 40000; if (eras != 0) { year = year - (eras * 40000); res += (SECS_PER_ERA * eras * 100); } if (year >= 1970) { for (i = year - 1; i >= 1970; i--) { //判断是否是闰年，闰年366天，平年365天 if (timelib_is_leap(i)) { res += (DAYS_PER_LYEAR * SECS_PER_DAY); } else { res += (DAYS_PER_YEAR * SECS_PER_DAY); } } } else { for (i = 1969; i >= year; i--) { if (timelib_is_leap(i)) { res -= (DAYS_PER_LYEAR * SECS_PER_DAY); } else { res -= (DAYS_PER_YEAR * SECS_PER_DAY); } } } return res; }

= 1970; $i--) { if (is_leap($i)) { $res += YEARLEEP * 86400; } else { $res += YEAR * 86400; } } //上海是东八区要减8小时 $res -= 8 * 3600; return $res; } echo getStime('2020');