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Commit 2a0a50fe authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
Browse files

perf_counter: Update userspace callchain sampling uses 



Update the tools to reflect the new callchain sampling format.

LKML-Reference: <new-submission>
Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent f9188e02

tools/perf/builtin-report.c

+39 −47
Original line number Diff line number Diff line
@@ -59,6 +59,11 @@ struct ip_event { 
	unsigned char __more_data[];

};



struct ip_callchain {

	__u64 nr;

	__u64 ips[0];

};



struct mmap_event {

	struct perf_event_header header;

	__u32 pid, tid;
@@ -833,15 +838,12 @@ resolve_symbol(struct thread *thread, struct map **mapp, 
	return dso->find_symbol(dso, ip);

}



static struct symbol *call__match(struct symbol *sym)

static int call__match(struct symbol *sym)

{

	if (!sym)

		return NULL;



	if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0))

		return sym;

		return 1;



	return NULL;

	return 0;

}



/*
@@ -850,7 +852,7 @@ static struct symbol *call__match(struct symbol *sym) 


static int

hist_entry__add(struct thread *thread, struct map *map, struct dso *dso,

		struct symbol *sym, __u64 ip, struct perf_callchain_entry *chain,

		struct symbol *sym, __u64 ip, struct ip_callchain *chain,

		char level, __u64 count)

{

	struct rb_node **p = &hist.rb_node;
@@ -869,31 +871,35 @@ hist_entry__add(struct thread *thread, struct map *map, struct dso *dso, 
	int cmp;



	if (sort__has_parent && chain) {

		int i, nr = chain->hv;

		__u64 context = PERF_CONTEXT_MAX;

		int i;



		for (i = 0; i < chain->nr; i++) {

			__u64 ip = chain->ips[i];

			struct dso *dso = NULL;

			struct symbol *sym;

		struct dso *dso;

		__u64 ip;



		for (i = 0; i < chain->kernel; i++) {

			ip = chain->ip[nr + i];

			if (ip >= PERF_CONTEXT_MAX) {

				context = ip;

				continue;

			}



			switch (context) {

			case PERF_CONTEXT_KERNEL:

				dso = kernel_dso;

			sym = resolve_symbol(thread, NULL, &dso, &ip);

			entry.parent = call__match(sym);

			if (entry.parent)

				goto got_parent;

				break;

			default:

				break;

			}

		nr += i;



		for (i = 0; i < chain->user; i++) {

			ip = chain->ip[nr + i];

			sym = resolve_symbol(thread, NULL, NULL, &ip);

			entry.parent = call__match(sym);

			if (entry.parent)

				goto got_parent;

			sym = resolve_symbol(thread, NULL, &dso, &ip);



			if (sym && call__match(sym)) {

				entry.parent = sym;

				break;

			}

		}

		nr += i;

	}

got_parent:



	while (*p != NULL) {

		parent = *p;
@@ -1095,21 +1101,10 @@ static unsigned long total = 0, 
		     total_unknown = 0,

		     total_lost = 0;



static int validate_chain(struct perf_callchain_entry *chain, event_t *event)

static int validate_chain(struct ip_callchain *chain, event_t *event)

{

	unsigned int chain_size;



	if (chain->nr > MAX_STACK_DEPTH)

		return -1;

	if (chain->hv > MAX_STACK_DEPTH)

		return -1;

	if (chain->kernel > MAX_STACK_DEPTH)

		return -1;

	if (chain->user > MAX_STACK_DEPTH)

		return -1;

	if (chain->hv + chain->kernel + chain->user != chain->nr)

		return -1;



	chain_size = event->header.size;

	chain_size -= (unsigned long)&event->ip.__more_data - (unsigned long)event;
@@ -1130,7 +1125,7 @@ process_overflow_event(event_t *event, unsigned long offset, unsigned long head) 
	__u64 period = 1;

	struct map *map = NULL;

	void *more_data = event->ip.__more_data;

	struct perf_callchain_entry *chain = NULL;

	struct ip_callchain *chain = NULL;



	if (event->header.type & PERF_SAMPLE_PERIOD) {

		period = *(__u64 *)more_data;
@@ -1150,10 +1145,7 @@ process_overflow_event(event_t *event, unsigned long offset, unsigned long head) 


		chain = (void *)more_data;



		dprintf("... chain: u:%d, k:%d, nr:%d\n",

			chain->user,

			chain->kernel,

			chain->nr);

		dprintf("... chain: nr:%Lu\n", chain->nr);



		if (validate_chain(chain, event) < 0) {

			eprintf("call-chain problem with event, skipping it.\n");
@@ -1162,7 +1154,7 @@ process_overflow_event(event_t *event, unsigned long offset, unsigned long head) 


		if (dump_trace) {

			for (i = 0; i < chain->nr; i++)

				dprintf("..... %2d: %016Lx\n", i, chain->ip[i]);

				dprintf("..... %2d: %016Lx\n", i, chain->ips[i]);

		}

	}