调试协程

使用Swoole协程时，可以使用下面的方法进行调试

GDB调试

进入 gdb

gdb php test.php

gdbinit

(gdb) source /path/to/swoole-src/gdbinit

设置断点

例如 co::sleep 函数

(gdb) b zim_swoole_coroutine_util_sleep

打印当前进程的所有协程和状态

(gdb) co_list 
coroutine 1 SW_CORO_YIELD
coroutine 2 SW_CORO_RUNNING

打印当前运行时协程的调用栈

(gdb) co_bt 
coroutine cid:[2]
[0x7ffff148a100] Swoole\Coroutine->sleep(0.500000) [internal function]
[0x7ffff148a0a0] {closure}() /home/shiguangqi/php/swoole-src/examples/coroutine/exception/test.php:7 
[0x7ffff141e0c0] go(object[0x7ffff141e110]) [internal function]
[0x7ffff141e030] (main) /home/shiguangqi/php/swoole-src/examples/coroutine/exception/test.php:10

打印指定协程id的调用栈

(gdb) co_bt 1
[0x7ffff1487100] Swoole\Coroutine->sleep(0.500000) [internal function]
[0x7ffff14870a0] {closure}() /home/shiguangqi/php/swoole-src/examples/coroutine/exception/test.php:3 
[0x7ffff141e0c0] go(object[0x7ffff141e110]) [internal function]
[0x7ffff141e030] (main) /home/shiguangqi/php/swoole-src/examples/coroutine/exception/test.php:10 

打印全局协程的状态

(gdb) co_status 
     stack_size: 2097152
     call_stack_size: 1
     active: 1
     coro_num: 2
     max_coro_num: 3000
     peak_coro_num: 2

PHP代码调试

遍历当前进程内的所有协程，并打印调用栈。

function Coroutine::listCoroutines() : Iterator

需要4.1.0或更高版本

• 返回迭代器，可使用foreach遍历，或使用iterator_to_array转为数组

$coros = Coroutine::listCoroutines();
foreach($coros as $cid)
{
    var_dump(Coroutine::getBackTrace($cid));
}

可以参考Swoole微课程中的视频教程