fche changed the topic of #systemtap to: http://sourceware.org/systemtap; email systemtap@sourceware.org if answers here not timely, conversations may be logged
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<lorddoskias1> is systemtap supposed to work when the kernel is built with FENTRY rather than mcount?
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<irker544> systemtap: mcermak systemtap.git:refs/heads/master * release-3.0-137-g7fe1b7b / : Implement PR12748 by providing the syscall_table tapset files. http://tinyurl.com/hhvo5rq
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<lorddoskias1> fche: does systemtap use whatever is the current system compiler?
<lorddoskias1> i'm asking since after compiling my kernel with gcc 4.9.2 (using fentry instead of mcount) i can no longer use systemtap since it refuses to load the resulting kernel modules due to mcount not being found
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<fche> lorddoskias1, yes, stap tries hard to use the system compiler (resetting $PATH to some extent)
<fche> that's due to the opposite sorts of incompatibilities
<fche> see buildrun.cxx
<fche> make_any_make_cmd ...
<lorddoskias1> the thing is i used devtoolset-3 to compile my kernel and the reason why this is breaking is (i assume) due to stap using the default 4.4 based compiler
<fche> maybe we're too paranoid
<lorddoskias1> if i do for example : scl enable devtoolset-3 stap -g script.stap
<fche> does your custom compiler have a /bin/NAME that's not just 'gcc'? like 'gcc-4.9.5' or 'gcc -Bfoo' ?
<lorddoskias1> which compiler should systemtap use - the one in the bootstrappend environment (devtoolset) or the default one
<lorddoskias1> well my custom compiler is invoked via SCL
<lorddoskias1> i just bootstrap the software collection and that's it
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<lorddoskias1> let me check though
<fche> the cross-compilation kbuild macros may be enough to get at the compiler you really want
<fche> like stap -BCC=/path/to/scl/gcc etc.
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<irker544> systemtap: mcermak systemtap.git:refs/heads/master * release-3.0-138-g753f165 / man/cs/stap-server.8 man/cs/stap.1.in man/cs/stapprobes.3stap: Update the Czech version of manpages. http://tinyurl.com/jjakdmc
<lorddoskias1> fche: indeed, seems to be working now
<lorddoskias1> but i wonder why it doesn't work when i ran stap inside the scl gcc
<irker544> systemtap: mcermak systemtap.git:refs/heads/master * release-3.0-139-g8175608 / testsuite/Makefile.am testsuite/Makefile.in: Don't error on missing systemtap.sum http://tinyurl.com/z4emmx3
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<irker544> systemtap: mcermak systemtap.git:refs/heads/master * release-3.0-140-g403fa5e / tapset-utrace.cxx: Fix PR20281 by throwing an error if module has_path, which is empty. http://tinyurl.com/zfjxcb8
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<lorddoskias1> -BCC did the trick :D
<fche> ok
<lorddoskias1> where is this documented though
<lorddoskias1> and also i'd expect to also work as long as i run it with the respective scl command prepended
<fche> [man stap] describes -B / -a / etc.
<fche> we don't have a specific example about our $PATH sanitization, or how to override it with these flags
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<lorddoskias1> righto
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<fche> if you can think of some brief wording to explain/motivate as a part of the man page, we'd love a patch :)
<irker544> systemtap: dsmith systemtap.git:refs/heads/master * release-3.0-141-gcd59dfd / tapset/linux/aux_syscalls.stp tapset/uconversions.stp testsuite/buildok/conversions-embedded.stp: Partial 20236 fix: Add user_TYPE_error functions that throw errors. http://tinyurl.com/gqjm77z
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