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Commit bfecc60d authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 

Pull perf tool fixes from Ingo Molnar.

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf kvm: Finding struct machine fails for PERF_RECORD_MMAP
  perf annotate: Validate addr in symbol__inc_addr_samples
  perf hists browser: Fix NULL deref in hists browsing code
  perf hists: Catch and handle out-of-date hist entry maps.
  perf annotate: Fix hist decay
  perf top: Add intel_idle to the skip list
parents 2084c24a a7ca0803

tools/perf/builtin-top.c

+35 −1
Original line number Diff line number Diff line
@@ -42,6 +42,7 @@ 
#include "util/debug.h"



#include <assert.h>

#include <elf.h>

#include <fcntl.h>



#include <stdio.h>
@@ -59,6 +60,7 @@ 
#include <sys/prctl.h>

#include <sys/wait.h>

#include <sys/uio.h>

#include <sys/utsname.h>

#include <sys/mman.h>



#include <linux/unistd.h>
@@ -162,12 +164,40 @@ static void __zero_source_counters(struct hist_entry *he) 
	symbol__annotate_zero_histograms(sym);

}



static void ui__warn_map_erange(struct map *map, struct symbol *sym, u64 ip)

{

	struct utsname uts;

	int err = uname(&uts);



	ui__warning("Out of bounds address found:\n\n"

		    "Addr:   %" PRIx64 "\n"

		    "DSO:    %s %c\n"

		    "Map:    %" PRIx64 "-%" PRIx64 "\n"

		    "Symbol: %" PRIx64 "-%" PRIx64 " %c %s\n"

		    "Arch:   %s\n"

		    "Kernel: %s\n"

		    "Tools:  %s\n\n"

		    "Not all samples will be on the annotation output.\n\n"

		    "Please report to linux-kernel@vger.kernel.org\n",

		    ip, map->dso->long_name, dso__symtab_origin(map->dso),

		    map->start, map->end, sym->start, sym->end,

		    sym->binding == STB_GLOBAL ? 'g' :

		    sym->binding == STB_LOCAL  ? 'l' : 'w', sym->name,

		    err ? "[unknown]" : uts.machine,

		    err ? "[unknown]" : uts.release, perf_version_string);

	if (use_browser <= 0)

		sleep(5);

	

	map->erange_warned = true;

}



static void perf_top__record_precise_ip(struct perf_top *top,

					struct hist_entry *he,

					int counter, u64 ip)

{

	struct annotation *notes;

	struct symbol *sym;

	int err;



	if (he == NULL || he->ms.sym == NULL ||

	    ((top->sym_filter_entry == NULL ||
@@ -189,9 +219,12 @@ static void perf_top__record_precise_ip(struct perf_top *top, 
	}



	ip = he->ms.map->map_ip(he->ms.map, ip);

	symbol__inc_addr_samples(sym, he->ms.map, counter, ip);

	err = symbol__inc_addr_samples(sym, he->ms.map, counter, ip);



	pthread_mutex_unlock(&notes->lock);



	if (err == -ERANGE && !he->ms.map->erange_warned)

		ui__warn_map_erange(he->ms.map, sym, ip);

}



static void perf_top__show_details(struct perf_top *top)
@@ -615,6 +648,7 @@ static void *display_thread(void *arg) 


/* Tag samples to be skipped. */

static const char *skip_symbols[] = {

	"intel_idle",

	"default_idle",

	"native_safe_halt",

	"cpu_idle",

tools/perf/util/annotate.c

+6 −10
Original line number Diff line number Diff line
@@ -64,8 +64,8 @@ int symbol__inc_addr_samples(struct symbol *sym, struct map *map, 


	pr_debug3("%s: addr=%#" PRIx64 "\n", __func__, map->unmap_ip(map, addr));



	if (addr > sym->end)

		return 0;

	if (addr < sym->start || addr > sym->end)

		return -ERANGE;



	offset = addr - sym->start;

	h = annotation__histogram(notes, evidx);
@@ -561,16 +561,12 @@ void symbol__annotate_decay_histogram(struct symbol *sym, int evidx) 
{

	struct annotation *notes = symbol__annotation(sym);

	struct sym_hist *h = annotation__histogram(notes, evidx);

	struct objdump_line *pos;

	int len = sym->end - sym->start;

	int len = sym->end - sym->start, offset;



	h->sum = 0;



	list_for_each_entry(pos, &notes->src->source, node) {

		if (pos->offset != -1 && pos->offset < len) {

			h->addr[pos->offset] = h->addr[pos->offset] * 7 / 8;

			h->sum += h->addr[pos->offset];

		}

	for (offset = 0; offset < len; ++offset) {

		h->addr[offset] = h->addr[offset] * 7 / 8;

		h->sum += h->addr[offset];

	}

}

tools/perf/util/hist.c

+12 −0
Original line number Diff line number Diff line
@@ -256,6 +256,18 @@ static struct hist_entry *add_hist_entry(struct hists *hists, 
		if (!cmp) {

			he->period += period;

			++he->nr_events;



			/* If the map of an existing hist_entry has

			 * become out-of-date due to an exec() or

			 * similar, update it.  Otherwise we will

			 * mis-adjust symbol addresses when computing

			 * the history counter to increment.

			 */

			if (he->ms.map != entry->ms.map) {

				he->ms.map = entry->ms.map;

				if (he->ms.map)

					he->ms.map->referenced = true;

			}

			goto out;

		}

tools/perf/util/map.c

+1 −0
Original line number Diff line number Diff line
@@ -38,6 +38,7 @@ void map__init(struct map *self, enum map_type type, 
	RB_CLEAR_NODE(&self->rb_node);

	self->groups   = NULL;

	self->referenced = false;

	self->erange_warned = false;

}



struct map *map__new(struct list_head *dsos__list, u64 start, u64 len,

tools/perf/util/map.h

+1 −0
Original line number Diff line number Diff line
@@ -33,6 +33,7 @@ struct map { 
	u64			end;

	u8 /* enum map_type */	type;

	bool			referenced;

	bool			erange_warned;

	u32			priv;

	u64			pgoff;