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From: "mjw at redhat dot com" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug runtime/10512] STAP_PROBES don't work in c++ constructors/destructors
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------- Additional Comments From mjw at redhat dot com  2009-08-14 10:06 -------
(In reply to comment #3)
> (In reply to comment #2)
> > As can be seen from the alternatives suggested only the variables of the
> > function into which the probe was inlined are visible.
> 
> This is because they aren't available as dwarf locations.

But the are...

$ ./loc2c-test -e ./test.orig 0x40063f
cxxclass.cxx (0x11): 0x400620 (/home/mark/src/test/cxxclass.cxx:54) .. 0x4007db
(/home/mark/src/test/cxxclass.cxx:28)
    stdin                         [   8ac]      _IO_FILE*
    stdout                        [   8b9]      _IO_FILE*
    ProbeClass (0x1d): 0x400625 (/home/mark/src/test/cxxclass.cxx:14) ..
0x400656 (/home/mark/src/test/cxxclass.cxx:20)
        n                             [   6c5]  char const*
        v                             [   6ca]  <unknown 0x10> const
        this                          [   6cf]  ProbeClass* const
        <unnamed> (0xb): 0x400625 (/home/mark/src/test/cxxclass.cxx:14) ..
0x400640 (/home/mark/src/test/cxxclass.cxx:15)
            arg1                          [   6e5]      char const* volatile
            arg2                          [   6ed]      int volatile

But loc2c also has trouble retrieving them:

$ ./loc2c-test -e ./test.orig 0x40063b arg1
loc2c-test: required DW_AT_frame_base attribute not supplied
$ ./loc2c-test -e ./test.orig 0x40063b arg2
loc2c-test: required DW_AT_frame_base attribute not supplied


-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=10512

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