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Commit 139f42f3 authored by Adrian Hunter's avatar Adrian Hunter Committed by Arnaldo Carvalho de Melo
Browse files

perf thread-stack: Allocate an array of thread stacks 



In preparation for fixing thread stack processing for the idle task,
allocate an array of thread stacks.

Signed-off-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Acked-by: default avatarJiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/20181221120620.9659-7-adrian.hunter@intel.com


[ No need to check for NULL when calling zfree(), noticed by Jiri Olsa ]
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 2e9e8688

tools/perf/util/thread-stack.c

+17 −12
Original line number Diff line number Diff line
@@ -114,20 +114,25 @@ static int thread_stack__init(struct thread_stack *ts, struct thread *thread, 
static struct thread_stack *thread_stack__new(struct thread *thread,

					      struct call_return_processor *crp)

{

	struct thread_stack *ts;

	struct thread_stack *ts = thread->ts, *new_ts;

	unsigned int old_sz = ts ? ts->arr_sz : 0;

	unsigned int new_sz = 1;



	ts = zalloc(sizeof(struct thread_stack));

	if (!ts)

		return NULL;



	ts->arr_sz = 1;



	if (thread_stack__init(ts, thread, crp)) {

		free(ts);

	if (!ts || new_sz > old_sz) {

		new_ts = calloc(new_sz, sizeof(*ts));

		if (!new_ts)

			return NULL;

		if (ts)

			memcpy(new_ts, ts, old_sz * sizeof(*ts));

		new_ts->arr_sz = new_sz;

		zfree(&thread->ts);

		thread->ts = new_ts;

		ts = new_ts;

	}



	thread->ts = ts;

	if (!ts->stack &&

	    thread_stack__init(ts, thread, crp))

		return NULL;



	return ts;

}