[Bug 1557673] [NEW] systemtap does not work on xenial, struct module changes

[Launchpad Bug Tracker]

You have been subscribed to a public bug by Ubuntu Foundations Team Bug Bot (crichton):

[Impact]

Attempting to use systemtap on xenial with the 4.4 kernel results in:

ubuntu at xenial:~$ sudo stap test.stap
In file included from /usr/share/systemtap/runtime/print.c:17:0,
                 from /usr/share/systemtap/runtime/runtime_context.h:22,
                 from /tmp/stapxvNfgC/stap_2e27f5927a5796b18cb7b3c2abd24ec4_812_src.c:50:
/usr/share/systemtap/runtime/linux/print.c: In function ‘_stp_print_kernel_info’:
/usr/share/systemtap/runtime/linux/print.c:242:20: error: ‘struct module’ has no member named ‘module_core’
         THIS_MODULE->module_core,
                    ^
/usr/share/systemtap/runtime/linux/print.c:243:37: error: ‘struct module’ has no member named ‘core_size’
         (unsigned long) (THIS_MODULE->core_size - THIS_MODULE->core_text_size)/1024,
                                     ^
/usr/share/systemtap/runtime/linux/print.c:243:62: error: ‘struct module’ has no member named ‘core_text_size’
         (unsigned long) (THIS_MODULE->core_size - THIS_MODULE->core_text_size)/1024,
                                                              ^
/usr/share/systemtap/runtime/linux/print.c:244:44: error: ‘struct module’ has no member named ‘core_text_size’
                (unsigned long) (THIS_MODULE->core_text_size)/1024,
                                            ^
scripts/Makefile.build:258: recipe for target '/tmp/stapxvNfgC/stap_2e27f5927a5796b18cb7b3c2abd24ec4_812_src.o' failed
make[1]: *** [/tmp/stapxvNfgC/stap_2e27f5927a5796b18cb7b3c2abd24ec4_812_src.o] Error 1
Makefile:1396: recipe for target '_module_/tmp/stapxvNfgC' failed
make: *** [_module_/tmp/stapxvNfgC] Error 2
WARNING: kbuild exited with status: 2
Pass 4: compilation failed.  [man error::pass4]
Tip: /usr/share/doc/systemtap/README.Debian should help you get started.

[Test Case]

on a xenial system with the 4.4 kernel installed, and systemtap and
kernel dbgsyms installed, simply create a dummy stap script and try to
run it, e.g.:

$ cat test.stap 
#!/usr/bin/stap

probe begin {
  println("hello")
}
$ sudo stap test.stap

the above compilation failure will result.

[Regression Potential]

The commit updates stap to use the kernel module header correctly based
on a small test program, so there should be no regression, but possible
regression is breaking stap on the xenial 4.3 kernel.

[Other Info]

this requires upstream stap commit
3f040971e7efb4d323fcb63d83b4337f355c60db

** Affects: systemtap (Ubuntu)
     Importance: Undecided
     Assignee: Dan Streetman (ddstreet)
         Status: In Progress


** Tags: patch sts sts-sru
-- 
systemtap does not work on xenial, struct module changes
https://bugs.launchpad.net/bugs/1557673
You received this bug notification because you are a member of Ubuntu Sponsors Team, which is subscribed to the bug report.