Date: Mon, 26 Sep 2011 22:52:38 +0800 From: Paul Ambrose <ambrosehua@gmail.com> To: rysto32@gmail.com Cc: freebsd-current@freebsd.org Subject: [PATCH] dtrace crashes when trying to trace fbt probes Message-ID: <CAMwoQQ5sL-d-ej60%2B5EiB03x1hPt1Q%2BQexOtti_e1kOssa3Ozw@mail.gmail.com>
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Hi, Ryan, I came across the similar problem on 8-stable when I run
# dtrace -lv
the panic message says:
page fault just happened at fbt.c
........................................................................
if (*lc.ctfoffp == NULL) { // page fault
/*
* Initialise the CTF object and function symindx to
* byte offset array.
*/
if (fbt_ctfoff_init(ctl, &lc) != 0)
return;
/* Initialise the CTF type to byte offset array. */
if (fbt_typoff_init(&lc) != 0)
return;
}
........................................................................
And I came across the similar problem on 9-current only once, but when I
recompile the kernel,
it does not reproduce. I will try your patch on 8-stable, but could you tell
me where did you meet
the problem, and what is your module without CTF data?
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