self building systemtap have error, notice 'SSL_GetImplementedCiphers' domain undefined

[sosojustdo]

hi @agentzh myself building systemtap notice 'SSL_GetImplementedCiphers' domain undefined, error message detail for blow:

csclient.cxx: In member function ‘int compile_server_client::compile_using_server(std::vector<compile_server_info, std::allocator<compile_server_info> >&)’: csclient.cxx:1308: 错误：‘SSL_GetImplementedCiphers’ 在此作用域中尚未声明 csclient.cxx: In function ‘void add_server_trust(systemtap_session&, const std::string&, std::vector<compile_server_info, std::allocator<compile_server_info> >&)’: csclient.cxx:1760: 错误：‘SSL_GetImplementedCiphers’ 在此作用域中尚未声明 make[2]: *** [stap-csclient.o] 错误 1 make[2]: Leaving directory /usr/local/systemtap-2.9' make[1]: *** [all-recursive] 错误 1 make[1]: Leaving directory/usr/local/systemtap-2.9' make: *** [all] 错误 2

note: 1: systemtap version for 2.9 2: elfutils version for 0.149 3: install refer:https://sourceware.org/git/?p=systemtap.git;a=blob_plain;f=README;hb=HEAD 4: systemtap source code, look https://github.com/sysperf/systemtap, and csclient.cxx for line 1308 ,stap-serverd.cxx for line 2409 source file, "SSL_GetImplementedCiphers" is function

[agentzh]

@sosojustdo I'm confused. What tool in this nginx-systemtap-toolkit project are you using? If you're not using any of the tools in this repos, then you should post your questions to the systemtap mailing list instead.

[sosojustdo]

this problem sloved，due to systemtap version and elfutils version uncompatible； but executed ./ngx-sample-lua-bt -p 20477 --luajit20 -t 5 > /usr/local/tmp.bt， stay in the command line, also tmp.bt file 0 size, why?

[agentzh]

@sosojustdo Try making your process 20477 hotter in terms of CPU usage and/or increasing the sampling period in the -t option value.

[sosojustdo]

cpu usage increase, but notice:WARNING: missing unwind/symbol data for module 'uprobes', why?

[agentzh]

@sosojustdo This warning is harmless, usually.

[sosojustdo]

@agentzh uname -r print:3.10.0-229.14.1.el7.x86_64;
so that installed kernel-debuginfo-3.10.0-229.14.1.el7.x86_64 、kernel-debuginfo-common-3.10.0-229.14.1.el7.x86_64 、kernel-devel-3.10.0-229.14.1.el7.x86_64 tools，and yum install systemtap , systemtap final install version for :Systemtap translator/driver (version 2.6/0.163, non-git sources)

problem desc: executed command stap -v -e 'probe vfs.read {printf("read performed\n"); exit()}', print error: module version mismatch (#1 SMP Tue Sep 15 05:09:55 CDT 2015 vs #1 SMP Tue Sep 15 15:05:51 UTC 2015), release 3.10.0-229.14.1.el7.x86_64

[agentzh]

@sosojustdo It looks like the kernel module version does not exactly match. Note the timestamps recorded are different (05:09:55 CDT vs 15:05:51 UTC). Try removing the systemtap cache directory:

rm -rf ~/.systemtap/cache/

[weskerhluffy]

try modifying "/lib/modules//build/include/config/cross/compile.h"