关于OpenResty-stap++

zheng.xiaochuan · 2015-03-10T12:57:34+00:00

最后不用 close，用 set_keepalive 就是使用连接池，但即使...

关于OpenResty-stap++

zheng.xiaochuan

Hi,OpenResty ，你好，章大侠：

按照你之前的建议，我在使用OpenResty软件，包括lua-cjson ，逐步替代原来基于原始nginx的版本

在使用stap++的这个例子sample-bt-leaks.sxx时，发现对cjson动态库分析失败，过程如下：

[root@host-192-168-1-154 stapxx-master]# ./samples/sample-bt-leaks.sxx -v -x 28163 --arg time=5 -D STP_NO_OVERLOAD -D MAXMAPENTRIES=10000 > a.bt
Ignored ambiguous library /lib64/libc-2.12.so for "libc"
Ignored ambiguous library /lib64/libcrypt-2.12.so for "libc"
Pass 1: parsed user script and 106 library script(s) using 176560virt/33348res/2540shr/31464data kb, in 270usr/30sys/286real ms.
semantic error: while resolving probe point: identifier 'process' at <input>:17:7
source: probe process("/home/nginx/lualib/cjson.so").function("malloc").return,
^

semantic error: no match (similar functions: die, _fini, _init, json_decode, json_encode)

semantic error: while resolving probe point: identifier 'process' at :18:7
source: process("/home/nginx/lualib/cjson.so").function("calloc").return,
^

semantic error: no match (similar functions: die, _fini, _init, json_decode, json_encode)

semantic error: while resolving probe point: identifier 'process' at :19:7
source: process("/home/nginx/lualib/cjson.so").function("realloc").return
^

semantic error: no match (similar functions: die, _fini, _init, decode_hex4, json_encode)

semantic error: while resolving probe point: identifier 'process' at :74:7
source: probe process("/home/nginx/lualib/cjson.so").function("free")
^

semantic error: no match (similar functions: die, _fini, strbuf_free, _init, strbuf_new)

Pass 2: analyzed script: 2 probe(s), 139 function(s), 3 embed(s), 5 global(s) using 177940virt/35652res/3504shr/32844data kb, in 20usr/90sys/124real ms.
Pass 2: analysis failed. [man error::pass2]

我试着把cjson中的编译选项由

#CFLAGS = -g -Wall -pedantic -fno-inline
CFLAGS = -O3 -Wall -pedantic -DNDEBUG

改成

CFLAGS = -g -Wall -pedantic -fno-inline
#CFLAGS = -O3 -Wall -pedantic -DNDEBUG

还是依然报错，请问是我哪里搞错了吗？

谢谢！

BTW, Luajit是使用的OpenRestu版本包中的2.1.0.2的版本。


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agentzh

Hello!

On Mon, Mar 9, 2015 at 9:57 PM, <zheng.x...@zte.com.cn> wrote:
> 在使用stap++的这个例子sample-bt-leaks.sxx时，发现对cjson动态库分析失败，过程如下：
> [root@host-192-168-1-154 stapxx-master]# ./samples/sample-bt-leaks.sxx -v -x 28163     --arg time=5  -D STP_NO_OVERLOAD -D MAXMAPENTRIES=10000 > a.bt
> Ignored ambiguous library /lib64/libc-2.12.so for "libc"
> Ignored ambiguous library /lib64/libcrypt-2.12.so for "libc"
> Pass 1: parsed user script and 106 library script(s) using 176560virt/33348res/2540shr/31464data kb, in 270usr/30sys/286real ms.
> semantic error: while resolving probe point: identifier 'process' at <input>:17:7
>         source: probe process("/home/nginx/lualib/cjson.so").function("malloc").return,
>                       ^
>

你确认你的 stap++ 仓库是最新的吗？请尝试 git pull. 我记得我前不久刚修正过这个问题。

Regards,
-agentzh

zheng.xiaochuan

是的，我确认是最新版本的stapxx-master，刚刚重新下载，又试了一下，还是那样的报错

https://github.com/openresty/stapxx

========================================================

--- 新手机号18913818108请惠存,原来的手机号不用了,谢谢 ---

========================================================

"Yichun Zhang (agentzh)" <age...@gmail.com>
发件人: openresty@googlegroups.com

2015-03-10 14:29

请答复给
openresty@googlegroups.com

收件人	openresty <openresty@googlegroups.com>
抄送
主题	Re: [openresty] 关于OpenResty-stap++

Hello! On Mon, Mar 9, 2015 at 9:57 PM, <zheng.x...@zte.com.cn> wrote: > 在使用stap++的这个例子sample-bt-leaks.sxx时，发现对cjson动态库分析失败，过程如下： > [root@host-192-168-1-154 stapxx-master]# ./samples/sample-bt-leaks.sxx -v -x 28163 --arg time=5 -D STP_NO_OVERLOAD -D MAXMAPENTRIES=10000 > a.bt > Ignored ambiguous library /lib64/libc-2.12.so for "libc" > Ignored ambiguous library /lib64/libcrypt-2.12.so for "libc" > Pass 1: parsed user script and 106 library script(s) using 176560virt/33348res/2540shr/31464data kb, in 270usr/30sys/286real ms. > semantic error: while resolving probe point: identifier 'process' at <input>:17:7 > source: probe process("/home/nginx/lualib/cjson.so").function("malloc").return, > ^ > 你确认你的 stap++ 仓库是最新的吗？请尝试 git pull. 我记得我前不��刚修正过这个问题。 Regards, -agentzh --


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Attachment: stapxx-master (1).zip
Description: Zip archive

agentzh

Hello!

On Mon, Mar 9, 2015 at 11:54 PM, zheng.xiaochuan wrote:
>
> 是的，我确认是最新版本的stapxx-master，刚刚重新下载，又试了一下，还是那样的报错
>

多谢报告！刚刚提交了一个补丁修复了这个问题：

   https://github.com/openresty/stapxx/commit/311f6119

请重新 git pull 再尝试最新的 master :)

Thanks!
-agentzh

zheng.xiaochuan

bugfixed !

多谢春哥，终于看到火焰了！

========================================================

--- 新手机号18913818108请惠存,原来的手机号不用了,谢谢 ---

========================================================

"Yichun Zhang (agentzh)" <age...@gmail.com>
发件人: openresty@googlegroups.com

2015-03-11 04:51

请答复给
openresty@googlegroups.com

收件人	openresty <openresty@googlegroups.com>
抄送
主题	Re: 答复: Re: [openresty] 关于OpenResty-stap++

Hello! On Mon, Mar 9, 2015 at 11:54 PM, zheng.xiaochuan wrote: > > 是的，我确认是最新版本的stapxx-master，刚刚重新下载，又试了一下，还是那样的报错 > 多谢报告！刚刚提交了一个补丁修复了这个问题： https://github.com/openresty/stapxx/commit/311f6119请重新 git pull 再尝试最新的 master :) Thanks! -agentzh --


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ZTE Information Security Notice: The information contained in this mail (and any attachment transmitted herewith) is privileged and confidential and is intended for the exclusive use of the addressee(s).  If you are not an intended recipient, any disclosure, reproduction, distribution or other dissemination or use of the information contained is strictly prohibited.  If you have received this mail in error, please delete it and notify us immediately.

zheng.xiaochuan

sorry to diturb again ,

这个错误我看不懂是什么意思，nginx进程是debug版的，我也新编译安装了elfutils-0.153

[root@host-192-168-1-154 stapxx-master]# ./samples/ngx-rps.sxx -x 28162
semantic error: not accessible at this address (pc: 0x4897e9) [man error::dwarf]: identifier '$r' at <input>:10:30
dieoffset: 0x128c59 from unknown debug file for /home/zxcdn/ottcache/nginx/sbin/nginx
function: ngx_http_log_request at src/http/ngx_http_request.c:3449 inlined by ngx_http_free_request at src/http/ngx_http_request.c:3402
<cannot suggest any alternative locations, elfutils too old>
source: if (pid() == target() && $r == $r->main) {
^

Pass 2: analysis failed. [man error::pass2]

章大侠帮忙看下？

========================================================

--- 新手机号18913818108请惠存,原来的手机号不用了,谢谢 ---

========================================================

"Yichun Zhang (agentzh)" <age...@gmail.com>
发件人: openresty@googlegroups.com

2015-03-11 04:51

请答复给
openresty@googlegroups.com

收件人	openresty <openresty@googlegroups.com>
抄送
主题	Re: 答复: Re: [openresty] 关于OpenResty-stap++


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ZTE Information Security Notice: The information contained in this mail (and any attachment transmitted herewith) is privileged and confidential and is intended for the exclusive use of the addressee(s).  If you are not an intended recipient, any disclosure, reproduction, distribution or other dissemination or use of the information contained is strictly prohibited.  If you have received this mail in error, please delete it and notify us immediately.

agentzh

Hello!

On Wed, Mar 11, 2015 at 12:15 AM, zheng.xiaochuan wrote:
> [root@host-192-168-1-154 stapxx-master]# ./samples/ngx-rps.sxx -x  28162
> semantic error: not accessible at this address (pc: 0x4897e9) [man error::dwarf]: identifier '$r' at <input>:10:30
>         dieoffset: 0x128c59 from unknown debug file for /home/zxcdn/ottcache/nginx/sbin/nginx
>         function: ngx_http_log_request at src/http/ngx_http_request.c:3449 inlined by ngx_http_free_request at src/http/ngx_http_request.c:3402
>         <cannot suggest any alternative locations, elfutils too old>
>         source:     if (pid() == target() && $r == $r->main) {
>                                              ^

你确认你的 systemtap 实际使用的 elfutils 足够新吗？为什么 systemtap 报告“elfutils too old”？

Regards,
-agentzh

zheng.xiaochuan

Hi,

我重新安装了新版本的elfutils，现在没有报too old的错误了

可以还是有其他错误：

[root@host-192-168-1-154 stapxx-master]# ./samples/ngx-rps.sxx -x 7368
semantic error: not accessible at this address (pc: 0x4897e9) [man error::dwarf]: identifier '$r' at <input>:10:30
dieoffset: 0x128c59 from unknown debug file for /home/zxcdn/ottcache/nginx/sbin/nginx
function: ngx_http_log_request at src/http/ngx_http_request.c:3449 inlined by ngx_http_free_request at src/http/ngx_http_request.c:3402
alternative locations: [0x4897fc,0x489874], [0x489881,0x4898e0], [0x4899a0,0x4899de]
source: if (pid() == target() && $r == $r->main) {
^

Pass 2: analysis failed. [man error::pass2]
[root@host-192-168-1-154 stapxx-master]#

========================================================

--- 新手机号18913818108请惠存,原来的手机号不用了,谢谢 ---

========================================================

"Yichun Zhang (agentzh)" <age...@gmail.com>
发件人: openresty@googlegroups.com

2015-03-12 05:31

请答复给
openresty@googlegroups.com

收件人	openresty <openresty@googlegroups.com>
抄送
主题	Re: 答复: Re: 答复: Re: [openresty] 关于OpenResty-stap++

Hello! On Wed, Mar 11, 2015 at 12:15 AM, zheng.xiaochuan wrote: > [root@host-192-168-1-154 stapxx-master]# ./samples/ngx-rps.sxx -x 28162 > semantic error: not accessible at this address (pc: 0x4897e9) [man error::dwarf]: identifier '$r' at <input>:10:30 > dieoffset: 0x128c59 from unknown debug file for /home/zxcdn/ottcache/nginx/sbin/nginx > function: ngx_http_log_request at src/http/ngx_http_request.c:3449 inlined by ngx_http_free_request at src/http/ngx_http_request.c:3402 > <cannot suggest any alternative locations, elfutils too old> > source: if (pid() == target() && $r == $r->main) { > ^ 你确认你的 systemtap 实际使用的 elfutils 足够新吗？为什么 systemtap 报告“elfutils too old”？ Regards, -agentzh --


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ZTE Information Security Notice: The information contained in this mail (and any attachment transmitted herewith) is privileged and confidential and is intended for the exclusive use of the addressee(s).  If you are not an intended recipient, any disclosure, reproduction, distribution or other dissemination or use of the information contained is strictly prohibited.  If you have received this mail in error, please delete it and notify us immediately.

agentzh

Hello!

On Thu, Mar 12, 2015 at 2:17 AM, zheng.xiaochuan wrote:
> [root@host-192-168-1-154 stapxx-master]# ./samples/ngx-rps.sxx -x 7368
> semantic error: not accessible at this address (pc: 0x4897e9) [man error::dwarf]: identifier '$r' at <input>:10:30
>         dieoffset: 0x128c59 from unknown debug file for /home/zxcdn/ottcache/nginx/sbin/nginx
>         function: ngx_http_log_request at src/http/ngx_http_request.c:3449 inlined by ngx_http_free_request at src/http/ngx_http_request.c:3402
>         alternative locations: [0x4897fc,0x489874], [0x489881,0x4898e0], [0x4899a0,0x4899de]
>         source:     if (pid() == target() && $r == $r->main) {
>                                              ^

貌似你的 C 编译器为内联函数生成了错误的 DWARF 调试信息。你使用的具体哪个版本的 gcc？你这个 nginx 最初又是如何构造的？

Regards,
-agentzh