Commit b3c98314 authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

rcutorture: Place event-traced strings into trace buffer 



Strings used in event tracing need to be specially handled, for example,
being copied to the trace buffer instead of being pointed to by the trace
buffer.  Although the TPS() macro can be used to "launder" pointed-to
strings, this might not be all that effective within a loadable module.
This commit therefore copies rcutorture's strings to the trace buffer.

Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
parent 5e741fa9

include/trace/events/rcu.h

+5 −2
Original line number Diff line number Diff line
@@ -703,6 +703,7 @@ TRACE_EVENT(rcu_batch_end, 
 * at the beginning and end of the read, respectively.  Note that the

 * callback address can be NULL.

 */

#define RCUTORTURENAME_LEN 8

TRACE_EVENT(rcu_torture_read,



	TP_PROTO(const char *rcutorturename, struct rcu_head *rhp,
@@ -711,7 +712,7 @@ TRACE_EVENT(rcu_torture_read, 
	TP_ARGS(rcutorturename, rhp, secs, c_old, c),



	TP_STRUCT__entry(

		__field(const char *, rcutorturename)

		__field(char, rcutorturename[RCUTORTURENAME_LEN])

		__field(struct rcu_head *, rhp)

		__field(unsigned long, secs)

		__field(unsigned long, c_old)
@@ -719,7 +720,9 @@ TRACE_EVENT(rcu_torture_read, 
	),



	TP_fast_assign(

		__entry->rcutorturename = rcutorturename;

		strncpy(__entry->rcutorturename, rcutorturename,

			RCUTORTURENAME_LEN);

		__entry->rcutorturename[RCUTORTURENAME_LEN - 1] = 0;

		__entry->rhp = rhp;

		__entry->secs = secs;

		__entry->c_old = c_old;

kernel/rcu/rcutorture.c

+1 −1
Original line number Diff line number Diff line
@@ -496,7 +496,7 @@ static struct rcu_torture_ops rcu_busted_ops = { 
	.fqs		= NULL,

	.stats		= NULL,

	.irq_capable	= 1,

	.name		= "rcu_busted"

	.name		= "busted"

};



/*

tools/testing/selftests/rcutorture/configs/rcu/BUSTED.boot

+1 −1
Original line number Diff line number Diff line 
rcutorture.torture_type=rcu_busted
 
rcutorture.torture_type=busted

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