502 bad gateway error! ubuntu 16.04lts nginx 2, yaf 3.0.4

[jobsfan]

下面的服务器环境都是用apt-get命令搭建的，本人不太会编译安装。

1、用的是ubuntu 16.04lts server版，先update upgrade到最新(apt-get update, apt-get upgrade)

2、用以下命令安装lnmp
sudo apt-get install nginx
sudo apt-get install mysql-server mysql-client
sudo apt-get install php7.0-fpm

3、修改php.ini配置（否则nginx不解析php）
php7.0配置 /etc/php/7.0/fpm/php.ini
cgi.fix_pathinfo=0
重启service php7.0-fpm reload

4、配置的virtualhost （附件里面找到，在/etc/nginx/sites-available里面放入附件的www.jobsfan.com虚拟机配置，然后在sites-enable里面建个软连接，后重启nginx）

nginx配置默认的虚拟机配置以支持php /etc/nginx/sites-available/www.jobsfan.com
server {
listen 80;
listen [::]:80;

server_name jobsfan.com www.jobsfan.com;

root /opt/www/www.jobsfan.com/public;
index index.html index.php;

location / {
	try_files $uri $uri/ /index.php$is_args$args;
}

location ~ \.php$ {
	include snippets/fastcgi-php.conf;
	 #include /etc/nginx/fastcgi_params;
#
#	# With php7.0-cgi alone:
	#fastcgi_pass 127.0.0.1:9000;
#	# With php7.0-fpm:
	fastcgi_pass unix:/run/php/php7.0-fpm.sock;
}

location ~ \.htaccess {
    deny all;
}

}

重启service nginx reload

5、pecl安装yaf，先安装phpize

sudo apt-get install php7.0-dev
pecl install yaf

6、修改cli和pfm下的php.ini，加入extension=yaf.so

至此环境已经搭建完成

===============下面是yaf部分的关键代码=========================
/opt/www/www.jobsfan.com/application/plugins 下面的Layout.php
`<?php
class LayoutPlugin extends Yaf_Plugin_Abstract
{
private $_layoutDir;
private $_layoutFile;
private $_layoutVars = array();

public function __construct($layoutFile, $layoutDir=null)
{
    $this->_layoutFile = $layoutFile;
    $this->_layoutDir = ($layoutDir) ? $layoutDir : APP_PATH . 'views/';
}

public function __set($name, $value)
{
    $this->_layoutVars[$name] = $value;
    /**
    * 例子
    * $my = new LayoutPlugin(my.html);
    * $my->name='cj';
    * echo $my->name;  //if add __get() , will output cj
    */
}

public function dispatchLoopShutDown(Yaf_Request_Abstract $request, Yaf_Response_Abstract $response)
{
    
}

public function dispatchLoopStartup (Yaf_Request_Abstract $request, Yaf_Response_Abstract $response)
{
    
}

public function postDispatch (Yaf_Request_Abstract $request, Yaf_Response_Abstract $response)
{
    $response->clearBody();exit('989898');
    /* $body = $response->getBody();
    $response->clearBody();
    exit('8898'); */
    /* //获取已经设置响应的Body
    $body = $response->getBody();
    //清除已经设置响应的body
    $response->clearBody();
    
    $layout = new Yaf_View_Simple($this->_layoutDir);
    $layout->content = $body;
    $layout->assign('layout', $this->_layoutVars);
    //设置响应的body
    $response->setBody($layout->render($this->_layoutFile)); */
}

public function preDispatch (Yaf_Request_Abstract $request, Yaf_Response_Abstract $response)
{

}

public function preResponse (Yaf_Request_Abstract $request, Yaf_Response_Abstract $response)
{
    
}

public function routerShutdown (Yaf_Request_Abstract $request, Yaf_Response_Abstract $response)
{
    
}

public function routerStartup ( Yaf_Request_Abstract $request, Yaf_Response_Abstract $response)
{
    
}

}
`

自然在/opt/www/www.jobsfan.com/application 下面的Bootstrap.php中加入
`public function _initPlugin(Yaf_Dispatcher $dispatcher)
{
$userPlugin = new UserPlugin();
$dispatcher->registerPlugin($userPlugin);

    $layoutPlugin = new LayoutPlugin('layout.phtml');
    $dispatcher->registerPlugin($layoutPlugin);
}`

你host到服务器ip到www.jobsfan.com之后，就可以看到502 bad gateway的错误了。奇怪的是，当你把plugins里面的Layout.php中的$response->clearBody();exit('989898');这一句注释或者删除，就立马什么错误都没有了。
我看到issue里面有个502错误，但是和我的情况不太一样#229

最后总结一句，就是$response->clearBody();这句报错。这个到底是php7和yaf3不兼容呢，还是环境出了挂，如果是环境出了挂，应该怎么修正的。希望鸟哥有空看一下。

[motecshine]

提供一个解决思路

1. 先核查下你的 web环境下的php版本是否和 php-cli 一致

2. cd到你的项目目录下
   *首先 php -m |grep yaf 确定是否启用了扩展
   *php -S localhost:8000 启动服务再访问

3. master 分支是 php7.0

[jobsfan]

@motecshine 谢谢你的回复

1. web phpinfo() 显示的是PHP Version 7.0.8-0ubuntu0.16.04.3
   root@ubuntu:~# php -v
   PHP 7.0.8-0ubuntu0.16.04.3 (cli) ( NTS )
   Copyright (c) 1997-2016 The PHP Group
   Zend Engine v3.0.0, Copyright (c) 1998-2016 Zend Technologies
   with Zend OPcache v7.0.8-0ubuntu0.16.04.3, Copyright (c) 1999-2016, by Zend Technologies

2. php -m |grep yaf 显示yaf，这个肯定是有的，不用试，因为只要把我最layout.php里面的clearbody这句去掉，整个框架都是正常的，能用的。

php -S localhost:8000 我没有用过php cli的这种server，即便这样操作行，对我来说，没有什么意义

再次感谢你的回复

[laruence]

502的话, 看看是不是php coredump了, 如果是, 就看看backtrace是啥, 贴出来

[jobsfan]

哇，鸟哥大神出来了

我core dump不会，有朋友让我用strace试，我按照这个里面的操作http://blog.csdn.net/leonpengweicn/article/details/50331455
得到如下信息

root@ubuntu:# ps -ef | grep fpm | awk '{print "-p " $2}' | xargs strace
strace: Process 3509 attached
strace: Process 9331 attached
strace: Process 9334 attached
strace: Process 9335 attached
strace: attach: ptrace(PTRACE_ATTACH, ...): No such process
[pid 9335] accept(0, <unfinished ...>
[pid 9334] accept(0, <unfinished ...>
[pid 9331] accept(0, <unfinished ...>
[pid 3509] epoll_wait(9, [], 1, 625) = 0
[pid 3509] epoll_wait(9, [], 1, 1000) = 0
[pid 3509] epoll_wait(9, [], 1, 1000) = 0
[pid 3509] epoll_wait(9, [], 1, 1000) = 0
[pid 3509] epoll_wait(9, [], 1, 1000) = 0
[pid 3509] epoll_wait(9, [], 1, 1000) = 0
[pid 3509] epoll_wait(9, [], 1, 150) = 0
[pid 3509] socket(PF_LOCAL, SOCK_DGRAM|SOCK_CLOEXEC, 0) = 10
[pid 3509] getsockopt(10, SOL_SOCKET, SO_SNDBUF, [212992], [4]) = 0
[pid 3509] setsockopt(10, SOL_SOCKET, SO_SNDBUFFORCE, [8388608], 4) = 0
[pid 3509] sendmsg(10, {msg_name(21)={sa_family=AF_LOCAL, sun_path="/run/systemd/notify"}, msg_iov(1)=[{"READY=1\nSTATUS=Processes active:"..., 86}], msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 86
[pid 3509] close(10) = 0
[pid 3509] epoll_wait(9, [], 1, 849) = 0
[pid 3509] epoll_wait(9, <unfinished ...>
[pid 9335] <... accept resumed> {sa_family=AF_LOCAL, NULL}, [2]) = 5
[pid 9335] times({tms_utime=0, tms_stime=0, tms_cutime=0, tms_cstime=0}) = 1444172471
[pid 9335] poll([{fd=5, events=POLLIN}], 1, 5000) = 1 ([{fd=5, revents=POLLIN}])
[pid 9335] read(5, "\1\1\0\1\0\10\0\0", 8) = 8
[pid 9335] read(5, "\0\1\0\0\0\0\0\0", 8) = 8
[pid 9335] read(5, "\1\4\0\1\3n\2\0", 8) = 8
[pid 9335] read(5, "\17/SCRIPT_FILENAME/opt/www/jobsfa"..., 880) = 880
[pid 9335] read(5, "\1\4\0\1\0\0\0\0", 8) = 8
[pid 9335] brk(0x55796ae8a000) = 0x55796ae8a000
[pid 9335] brk(0x55796aeab000) = 0x55796aeab000
[pid 9335] stat("/opt/www/jobsfan/www.jobsfan.com/public/.user.ini", 0x7ffeabdb9e90) = -1 ENOENT (No such file or directory)
[pid 9335] setitimer(ITIMER_PROF, {it_interval={0, 0}, it_value={600, 0}}, NULL) = 0
[pid 9335] rt_sigaction(SIGPROF, {0x55796991e4d0, [PROF], SA_RESTORER|SA_RESTART, 0x7f6998f884b0}, {SIG_DFL, [], 0}, 8) = 0
[pid 9335] rt_sigprocmask(SIG_UNBLOCK, [PROF], NULL, 8) = 0
[pid 9335] mmap(NULL, 65536, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f699ae72000
[pid 9335] getcwd("/", 4095) = 2
[pid 9335] chdir("/opt/www/jobsfan/www.jobsfan.com/public") = 0
[pid 9335] setitimer(ITIMER_PROF, {it_interval={0, 0}, it_value={300, 0}}, NULL) = 0
[pid 9335] fcntl(4, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET, l_start=1, l_len=1}) = 0
[pid 9335] stat("/opt/www/jobsfan/www.jobsfan.com/public/index.php", {st_mode=S_IFREG|0644, st_size=158, ...}) = 0
[pid 9335] lstat("/opt/www/jobsfan/www.jobsfan.com/public", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
[pid 9335] lstat("/opt/www/jobsfan/www.jobsfan.com", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
[pid 9335] lstat("/opt/www/jobsfan", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
[pid 9335] lstat("/opt/www", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
[pid 9335] lstat("/opt", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
[pid 9335] stat("/opt/www/jobsfan/www.jobsfan.com/conf/application.ini", {st_mode=S_IFREG|0644, st_size=899, ...}) = 0
[pid 9335] open("/opt/www/jobsfan/www.jobsfan.com/conf/application.ini", O_RDONLY) = 6
[pid 9335] ioctl(6, TCGETS, 0x7ffeabdb8700) = -1 ENOTTY (Inappropriate ioctl for device)
[pid 9335] fstat(6, {st_mode=S_IFREG|0644, st_size=899, ...}) = 0
[pid 9335] mmap(NULL, 931, PROT_READ, MAP_PRIVATE, 6, 0) = 0x7f699ae71000
[pid 9335] lseek(6, 0, SEEK_CUR) = 0
[pid 9335] munmap(0x7f699ae71000, 931) = 0
[pid 9335] close(6) = 0
[pid 9335] lstat("/opt/www/jobsfan/www.jobsfan.com/application/Bootstrap.php", {st_mode=S_IFREG|0644, st_size=1068, ...}) = 0
[pid 9335] lstat("/opt/www/jobsfan/www.jobsfan.com/application", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
[pid 9335] stat("/opt/www/jobsfan/www.jobsfan.com/application/Bootstrap.php", {st_mode=S_IFREG|0644, st_size=1068, ...}) = 0
[pid 9335] lstat("/opt/www/jobsfan/www.jobsfan.com/application/plugins/User.php", {st_mode=S_IFREG|0644, st_size=874, ...}) = 0
[pid 9335] lstat("/opt/www/jobsfan/www.jobsfan.com/application/plugins", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
[pid 9335] stat("/opt/www/jobsfan/www.jobsfan.com/application/plugins/User.php", {st_mode=S_IFREG|0644, st_size=874, ...}) = 0
[pid 9335] lstat("/opt/www/jobsfan/www.jobsfan.com/application/plugins/Layout.php", {st_mode=S_IFREG|0644, st_size=2138, ...}) = 0
[pid 9335] stat("/opt/www/jobsfan/www.jobsfan.com/application/plugins/Layout.php", {st_mode=S_IFREG|0644, st_size=2138, ...}) = 0
[pid 9335] mmap(NULL, 65536, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f699ae62000
[pid 9335] lstat("/opt/www/jobsfan/www.jobsfan.com/application/controllers/Index.php", {st_mode=S_IFREG|0644, st_size=569, ...}) = 0
[pid 9335] lstat("/opt/www/jobsfan/www.jobsfan.com/application/controllers", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
[pid 9335] stat("/opt/www/jobsfan/www.jobsfan.com/application/controllers/Index.php", {st_mode=S_IFREG|0644, st_size=569, ...}) = 0
[pid 9335] lstat("/opt/www/jobsfan/www.jobsfan.com/application/views/index/index.phtml", {st_mode=S_IFREG|0644, st_size=110, ...}) = 0
[pid 9335] lstat("/opt/www/jobsfan/www.jobsfan.com/application/views/index", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
[pid 9335] lstat("/opt/www/jobsfan/www.jobsfan.com/application/views", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
[pid 9335] stat("/opt/www/jobsfan/www.jobsfan.com/application/views/index/index.phtml", {st_mode=S_IFREG|0644, st_size=110, ...}) = 0
[pid 9335] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x7f6996000000} ---
[pid 9335] +++ killed by SIGSEGV +++
[pid 3509] <... epoll_wait resumed> 0x55796ad2cc10, 1, 1000) = -1 EINTR (Interrupted system call)
[pid 3509] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=9335, si_uid=33, si_status=SIGSEGV, si_utime=0, si_stime=0} ---
[pid 3509] write(7, "C", 1) = 1
[pid 3509] rt_sigreturn({mask=[]}) = -1 EINTR (Interrupted system call)
[pid 3509] epoll_wait(9, [{EPOLLIN, {u32=1775360384, u64=93979954764160}}], 1, 951) = 1
[pid 3509] read(6, "C", 1) = 1
[pid 3509] wait4(-1, [{WIFSIGNALED(s) && WTERMSIG(s) == SIGSEGV}], WNOHANG|WSTOPPED, NULL) = 9335
[pid 3509] write(5, "[16-Feb-2017 06:05:42] WARNING: "..., 120) = 120
[pid 3509] clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7f699aed7b90) = 9481
[pid 3509] write(5, "[16-Feb-2017 06:05:42] NOTICE: ["..., 61) = 61
[pid 3509] wait4(-1, 0x7ffeabdbaf5c, WNOHANG|WSTOPPED, NULL) = 0
[pid 3509] read(6, 0x7ffeabdbb047, 1) = -1 EAGAIN (Resource temporarily unavailable)
[pid 3509] epoll_wait(9, [], 1, 949) = 0
[pid 3509] epoll_wait(9, [], 1, 1000) = 0
[pid 3509] epoll_wait(9, [], 1, 1000) = 0
[pid 3509] epoll_wait(9, [], 1, 1000) = 0
[pid 3509] epoll_wait(9, [], 1, 1000) = 0
[pid 3509] epoll_wait(9, [], 1, 1000) = 0
[pid 3509] epoll_wait(9, [], 1, 1000) = 0
[pid 3509] epoll_wait(9, [], 1, 1000) = 0
[pid 3509] epoll_wait(9, [], 1, 1000) = 0
[pid 3509] epoll_wait(9, [], 1, 138) = 0
[pid 3509] socket(PF_LOCAL, SOCK_DGRAM|SOCK_CLOEXEC, 0) = 10
[pid 3509] getsockopt(10, SOL_SOCKET, SO_SNDBUF, [212992], [4]) = 0
[pid 3509] setsockopt(10, SOL_SOCKET, SO_SNDBUFFORCE, [8388608], 4) = 0
[pid 3509] sendmsg(10, {msg_name(21)={sa_family=AF_LOCAL, sun_path="/run/systemd/notify"}, msg_iov(1)=[{"READY=1\nSTATUS=Processes active:"..., 88}], msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 88
[pid 3509] close(10) = 0
[pid 3509] epoll_wait(9, ^C
root@ubuntu:# strace: Process 3509 detached

[persiliao]

重新编译了一个新版PHP不会报502，运行正常。

[jobsfan]

@ipersi 可能通过sudo apt-get install php7.0-fpm这种方式搞的环境，yaf的clearbody都不行，我apt-get update, upgrade把php从7.0.9升级到7.0.13，还是报502 bad gateway

[laruence]

关于如何得到coredump, 看这个: http://bugs.php.net/bugs-generating-backtrace.php

[wangcn]

php7.1.3 debug模式下，clearBody会core dump. release下正常。
backtracer如下：
#0 0x00000000008fae6d in zend_string_hash_val (s=0x5000000040) at /home/work/install/php-7.1.3/Zend/zend_string.h:85
#1 0x00000000008fe938 in zend_hash_del (ht=0x7fdbbdf70780, key=0x5000000040) at /home/work/install/php-7.1.3/Zend/zend_hash.c:1042
#2 0x00007fdbbdbd6387 in yaf_response_clear_body (response=0x7fdbbde15a90, name=0x5000000040) at /home/work/work/code/yaf/yaf_response.c:180
#3 0x00007fdbbdbd6b9d in zim_yaf_response_clearBody (execute_data=0x7fdbbde15a70, return_value=0x7ffe52ac5560)
at /home/work/work/code/yaf/yaf_response.c:362
#4 0x000000000094a670 in ZEND_DO_FCALL_SPEC_RETVAL_UNUSED_HANDLER () at /home/work/install/php-7.1.3/Zend/zend_vm_execute.h:970
#5 0x0000000000949066 in execute_ex (ex=0x7fdbbde15250) at /home/work/install/php-7.1.3/Zend/zend_vm_execute.h:429
#6 0x00000000008d19ae in zend_call_function (fci=0x7ffe52ac5790, fci_cache=0x7ffe52ac5730)
at /home/work/install/php-7.1.3/Zend/zend_execute_API.c:846
#7 0x0000000000911a62 in zend_call_method (object=0x7fdbbdf40068, obj_ce=0x7fdbbdf269f0, fn_proxy=0x0,
function_name=0x7fdbbdbef192 "routershutdown", function_name_len=14, retval_ptr=0x0, param_count=2, arg1=0x7fdbbde75d48,
arg2=0x7ffe52ac59e0) at /home/work/install/php-7.1.3/Zend/zend_interfaces.c:99
#8 0x00007fdbbdbc349e in yaf_dispatcher_dispatch (dispatcher=0x7fdbbdec66f8, response_ptr=0x7ffe52ac59e0)
at /home/work/work/code/yaf/yaf_dispatcher.c:863
#9 0x00007fdbbdbbe5f8 in zim_yaf_application_run (execute_data=0x7fdbbde15200, return_value=0x7ffe52ac5a80)
at /home/work/work/code/yaf/yaf_application.c:444
#10 0x000000000094a670 in ZEND_DO_FCALL_SPEC_RETVAL_UNUSED_HANDLER () at /home/work/install/php-7.1.3/Zend/zend_vm_execute.h:970
#11 0x0000000000949066 in execute_ex (ex=0x7fdbbde15030) at /home/work/install/php-7.1.3/Zend/zend_vm_execute.h:429
#12 0x0000000000949178 in zend_execute (op_array=0x7fdbbde75000, return_value=0x0) at /home/work/install/php-7.1.3/Zend/zend_vm_execute.h:474
#13 0x00000000008ea972 in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /home/work/install/php-7.1.3/Zend/zend.c:1476
#14 0x000000000085a95a in php_execute_script (primary_file=0x7ffe52ac8070) at /home/work/install/php-7.1.3/main/main.c:2537
#15 0x00000000009d9215 in main (argc=4, argv=0x7ffe52ac8298) at /home/work/install/php-7.1.3/sapi/fpm/fpm/fpm_main.c:1966

我的环境：
openSUSE42.2+gcc4.8.5+php7.1.3+yaf@5dfce05

[ghost]

Today we meet the same problem.

The minimal reproduce code

$res = $this->yafResponse;
        $res->setHeader('Content-Type', $contentType, false, $responseCode);
        $res->setBody($content);
        $res->response();
        $res->clearBody();
        $res->clearHeaders();

Seems $res->response() will release the hashtable, then the clearBody() try to delete an element of non exists hashtable

int yaf_response_clear_body(yaf_response_t *response, zend_string *name) {
	zval *zbody;
	zbody = zend_read_property(yaf_response_ce, response, ZEND_STRL(YAF_RESPONSE_PROPERTY_NAME_BODY), 1, NULL);

	if (name) {
		zend_hash_del(Z_ARRVAL_P(zbody), name);
	} else {
		zend_hash_clean(Z_ARRVAL_P(zbody));
	}
	return 1;
}

before zend_hash_del we really should check if the hashtable exists, and check if the element exists in the hash table

[ghost]

ping @laruence , May you please fix this ?

[zhangjiayin]

看上去类似 if (name) { 这样的判断需要修改 if (name && name != NULL && ZSTR_LEN(name) > 0) {

[zhangjiayin]

或者 去掉 $res->clearBody();

[rendong237]

我也遇到这个问题。不过很奇怪，同一个服务器，有的项目没问题。有的有。

[7506527.060672] php-fpm[27396]: segfault at 38933544 ip 0000000000859704 sp 00007ffd1fb3c170 error 4 in php-fpm[400000+b06000]

00000000008596f0 <zend_hash_del>:
8596f0: 41 57 push %r15
8596f2: 49 89 f7 mov %rsi,%r15
8596f5: 41 56 push %r14
8596f7: 49 89 fe mov %rdi,%r14
8596fa: 41 55 push %r13
8596fc: 41 54 push %r12
8596fe: 55 push %rbp
8596ff: 53 push %rbx
859700: 48 83 ec 38 sub $0x38,%rsp
859704: 4c 8b 46 08 mov 0x8(%rsi),%r8
859708: 4d 85 c0 test %r8,%r8
85970b: 0f 84 7f 01 00 00 je 859890 <zend_hash_del+0x1a0>
859711: 41 8b 46 0c mov 0xc(%r14),%eax
859715: 4d 8b 6e 10 mov 0x10(%r14),%r13
859719: 89 44 24 1c mov %eax,0x1c(%rsp)
85971d: 44 09 c0 or %r8d,%eax
859720: 48 98 cltq
859722: 41 8b 6c 85 00 mov 0x0(%r13,%rax,4),%ebp
859727: 83 fd ff cmp $0xffffffff,%ebp
85972a: 0f 84 a0 00 00 00 je 8597d0 <zend_hash_del+0xe0>
859730: 89 eb mov %ebp,%ebx
859732: 48 c1 e3 05 shl $0x5,%rbx
859736: 4c 01 eb add %r13,%rbx
859739: 48 8b 4b 18 mov 0x18(%rbx),%rcx
85973d: 4c 39 f9 cmp %r15,%rcx
859740: 0f 84 0c 02 00 00 je 859952 <zend_hash_del+0x262>
859746: 49 8d 47 18 lea 0x18(%r15),%rax
85974a: 45 31 db xor %r11d,%r11d

发现是xhprof开启就会有这个问
安装的xhprof：https://github.com/longxinH/xhprof.git
开启参数：$flags = XHPROF_FLAGS_CPU | XHPROF_FLAGS_MEMORY