PERFORCE change 96347 for review
John Birrell
jb at FreeBSD.org
Sat Apr 29 02:14:08 UTC 2006
http://perforce.freebsd.org/chv.cgi?CH=96347
Change 96347 by jb at jb_freebsd2 on 2006/04/29 02:13:53
Register and de-register the instruction size function pointer with
the trap() handler for kaboom-avoidance during probes.
Affected files ...
.. //depot/projects/dtrace/src/sys/cddl/dev/dtrace/dtrace_load.c#11 edit
.. //depot/projects/dtrace/src/sys/cddl/dev/dtrace/dtrace_unload.c#10 edit
Differences ...
==== //depot/projects/dtrace/src/sys/cddl/dev/dtrace/dtrace_load.c#11 (text+ko) ====
@@ -35,6 +35,9 @@
dtrace_enabling_t *enab;
int error = 0;
+ /* Hang our hook for DTrace traps during probes. */
+ dtrace_instr_size_func = dtrace_instr_size;
+
/*
* XXX This is a short term hack to avoid having to comment
* out lots and lots of lock/unlock calls.
@@ -161,6 +164,8 @@
dtrace_probeid_error = dtrace_probe_create((dtrace_provider_id_t)
dtrace_provider, NULL, NULL, "ERROR", 1, NULL);
+dtrace_err_verbose = 1;
+
dtrace_anon_property();
mutex_exit(&cpu_lock);
==== //depot/projects/dtrace/src/sys/cddl/dev/dtrace/dtrace_unload.c#10 (text+ko) ====
@@ -153,5 +153,9 @@
dtrace_mutex_destroy(&cpu_lock);
dtrace_mutex_destroy(&mod_lock);
+ /* Reset our hook for DTrace traps during probes. */
+ dtrace_instr_size_func = NULL;
+
+
return (error);
}
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