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Commit 43f322b4 authored by Riku Voipio's avatar Riku Voipio Committed by Arnaldo Carvalho de Melo
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perf tests: Switch from open to openat



Multiple perf tests fail on arm64 due to missing open syscall:

 2: detect open syscall event                              : FAILED!

open(2) is a legacy syscall, replaced with openat(2) since 2.6.16.  Thus
new architectures in kernel, such as arm64, don't implement these legacy
syscalls.

The patch replaces all sys_enter_open events with sys_enter_openat,
renames the related tests and test output to avoid confusion.

Signed-off-by: default avatarRiku Voipio <riku.voipio@linaro.org>
Reviewed-by: default avatarIngo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1429192375-13706-2-git-send-email-riku.voipio@linaro.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 3237f281
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+6 −6
Original line number Original line Diff line number Diff line
@@ -23,12 +23,12 @@ static struct test {
		.func = test__vmlinux_matches_kallsyms,
		.func = test__vmlinux_matches_kallsyms,
	},
	},
	{
	{
		.desc = "detect open syscall event",
		.desc = "detect openat syscall event",
		.func = test__open_syscall_event,
		.func = test__openat_syscall_event,
	},
	},
	{
	{
		.desc = "detect open syscall event on all cpus",
		.desc = "detect openat syscall event on all cpus",
		.func = test__open_syscall_event_on_all_cpus,
		.func = test__openat_syscall_event_on_all_cpus,
	},
	},
	{
	{
		.desc = "read samples using the mmap interface",
		.desc = "read samples using the mmap interface",
@@ -73,8 +73,8 @@ static struct test {
		.func = test__perf_evsel__tp_sched_test,
		.func = test__perf_evsel__tp_sched_test,
	},
	},
	{
	{
		.desc = "Generate and check syscalls:sys_enter_open event fields",
		.desc = "Generate and check syscalls:sys_enter_openat event fields",
		.func = test__syscall_open_tp_fields,
		.func = test__syscall_openat_tp_fields,
	},
	},
	{
	{
		.desc = "struct perf_event_attr setup",
		.desc = "struct perf_event_attr setup",
+6 −6
Original line number Original line Diff line number Diff line
@@ -4,12 +4,12 @@
#include "cpumap.h"
#include "cpumap.h"
#include "debug.h"
#include "debug.h"


int test__open_syscall_event_on_all_cpus(void)
int test__openat_syscall_event_on_all_cpus(void)
{
{
	int err = -1, fd, cpu;
	int err = -1, fd, cpu;
	struct cpu_map *cpus;
	struct cpu_map *cpus;
	struct perf_evsel *evsel;
	struct perf_evsel *evsel;
	unsigned int nr_open_calls = 111, i;
	unsigned int nr_openat_calls = 111, i;
	cpu_set_t cpu_set;
	cpu_set_t cpu_set;
	struct thread_map *threads = thread_map__new(-1, getpid(), UINT_MAX);
	struct thread_map *threads = thread_map__new(-1, getpid(), UINT_MAX);
	char sbuf[STRERR_BUFSIZE];
	char sbuf[STRERR_BUFSIZE];
@@ -27,7 +27,7 @@ int test__open_syscall_event_on_all_cpus(void)


	CPU_ZERO(&cpu_set);
	CPU_ZERO(&cpu_set);


	evsel = perf_evsel__newtp("syscalls", "sys_enter_open");
	evsel = perf_evsel__newtp("syscalls", "sys_enter_openat");
	if (evsel == NULL) {
	if (evsel == NULL) {
		if (tracefs_configured())
		if (tracefs_configured())
			pr_debug("is tracefs mounted on /sys/kernel/tracing?\n");
			pr_debug("is tracefs mounted on /sys/kernel/tracing?\n");
@@ -46,7 +46,7 @@ int test__open_syscall_event_on_all_cpus(void)
	}
	}


	for (cpu = 0; cpu < cpus->nr; ++cpu) {
	for (cpu = 0; cpu < cpus->nr; ++cpu) {
		unsigned int ncalls = nr_open_calls + cpu;
		unsigned int ncalls = nr_openat_calls + cpu;
		/*
		/*
		 * XXX eventually lift this restriction in a way that
		 * XXX eventually lift this restriction in a way that
		 * keeps perf building on older glibc installations
		 * keeps perf building on older glibc installations
@@ -66,7 +66,7 @@ int test__open_syscall_event_on_all_cpus(void)
			goto out_close_fd;
			goto out_close_fd;
		}
		}
		for (i = 0; i < ncalls; ++i) {
		for (i = 0; i < ncalls; ++i) {
			fd = open("/etc/passwd", O_RDONLY);
			fd = openat(0, "/etc/passwd", O_RDONLY);
			close(fd);
			close(fd);
		}
		}
		CPU_CLR(cpus->map[cpu], &cpu_set);
		CPU_CLR(cpus->map[cpu], &cpu_set);
@@ -96,7 +96,7 @@ int test__open_syscall_event_on_all_cpus(void)
			break;
			break;
		}
		}


		expected = nr_open_calls + cpu;
		expected = nr_openat_calls + cpu;
		if (evsel->counts->cpu[cpu].val != expected) {
		if (evsel->counts->cpu[cpu].val != expected) {
			pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls on cpu %d, got %" PRIu64 "\n",
			pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls on cpu %d, got %" PRIu64 "\n",
				 expected, cpus->map[cpu], evsel->counts->cpu[cpu].val);
				 expected, cpus->map[cpu], evsel->counts->cpu[cpu].val);
+3 −3
Original line number Original line Diff line number Diff line
@@ -5,7 +5,7 @@
#include "tests.h"
#include "tests.h"
#include "debug.h"
#include "debug.h"


int test__syscall_open_tp_fields(void)
int test__syscall_openat_tp_fields(void)
{
{
	struct record_opts opts = {
	struct record_opts opts = {
		.target = {
		.target = {
@@ -29,7 +29,7 @@ int test__syscall_open_tp_fields(void)
		goto out;
		goto out;
	}
	}


	evsel = perf_evsel__newtp("syscalls", "sys_enter_open");
	evsel = perf_evsel__newtp("syscalls", "sys_enter_openat");
	if (evsel == NULL) {
	if (evsel == NULL) {
		pr_debug("%s: perf_evsel__newtp\n", __func__);
		pr_debug("%s: perf_evsel__newtp\n", __func__);
		goto out_delete_evlist;
		goto out_delete_evlist;
@@ -66,7 +66,7 @@ int test__syscall_open_tp_fields(void)
	/*
	/*
	 * Generate the event:
	 * Generate the event:
	 */
	 */
	open(filename, flags);
	openat(AT_FDCWD, filename, flags);


	while (1) {
	while (1) {
		int before = nr_events;
		int before = nr_events;
+7 −7
Original line number Original line Diff line number Diff line
@@ -3,11 +3,11 @@
#include "debug.h"
#include "debug.h"
#include "tests.h"
#include "tests.h"


int test__open_syscall_event(void)
int test__openat_syscall_event(void)
{
{
	int err = -1, fd;
	int err = -1, fd;
	struct perf_evsel *evsel;
	struct perf_evsel *evsel;
	unsigned int nr_open_calls = 111, i;
	unsigned int nr_openat_calls = 111, i;
	struct thread_map *threads = thread_map__new(-1, getpid(), UINT_MAX);
	struct thread_map *threads = thread_map__new(-1, getpid(), UINT_MAX);
	char sbuf[STRERR_BUFSIZE];
	char sbuf[STRERR_BUFSIZE];


@@ -16,7 +16,7 @@ int test__open_syscall_event(void)
		return -1;
		return -1;
	}
	}


	evsel = perf_evsel__newtp("syscalls", "sys_enter_open");
	evsel = perf_evsel__newtp("syscalls", "sys_enter_openat");
	if (evsel == NULL) {
	if (evsel == NULL) {
		if (tracefs_configured())
		if (tracefs_configured())
			pr_debug("is tracefs mounted on /sys/kernel/tracing?\n");
			pr_debug("is tracefs mounted on /sys/kernel/tracing?\n");
@@ -34,8 +34,8 @@ int test__open_syscall_event(void)
		goto out_evsel_delete;
		goto out_evsel_delete;
	}
	}


	for (i = 0; i < nr_open_calls; ++i) {
	for (i = 0; i < nr_openat_calls; ++i) {
		fd = open("/etc/passwd", O_RDONLY);
		fd = openat(0, "/etc/passwd", O_RDONLY);
		close(fd);
		close(fd);
	}
	}


@@ -44,9 +44,9 @@ int test__open_syscall_event(void)
		goto out_close_fd;
		goto out_close_fd;
	}
	}


	if (evsel->counts->cpu[0].val != nr_open_calls) {
	if (evsel->counts->cpu[0].val != nr_openat_calls) {
		pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls, got %" PRIu64 "\n",
		pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls, got %" PRIu64 "\n",
			 nr_open_calls, evsel->counts->cpu[0].val);
			 nr_openat_calls, evsel->counts->cpu[0].val);
		goto out_close_fd;
		goto out_close_fd;
	}
	}


+6 −6
Original line number Original line Diff line number Diff line
@@ -427,7 +427,7 @@ static int test__checkevent_list(struct perf_evlist *evlist)
	TEST_ASSERT_VAL("wrong exclude_hv", !evsel->attr.exclude_hv);
	TEST_ASSERT_VAL("wrong exclude_hv", !evsel->attr.exclude_hv);
	TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
	TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);


	/* syscalls:sys_enter_open:k */
	/* syscalls:sys_enter_openat:k */
	evsel = perf_evsel__next(evsel);
	evsel = perf_evsel__next(evsel);
	TEST_ASSERT_VAL("wrong type", PERF_TYPE_TRACEPOINT == evsel->attr.type);
	TEST_ASSERT_VAL("wrong type", PERF_TYPE_TRACEPOINT == evsel->attr.type);
	TEST_ASSERT_VAL("wrong sample_type",
	TEST_ASSERT_VAL("wrong sample_type",
@@ -665,7 +665,7 @@ static int test__group3(struct perf_evlist *evlist __maybe_unused)
	TEST_ASSERT_VAL("wrong number of entries", 5 == evlist->nr_entries);
	TEST_ASSERT_VAL("wrong number of entries", 5 == evlist->nr_entries);
	TEST_ASSERT_VAL("wrong number of groups", 2 == evlist->nr_groups);
	TEST_ASSERT_VAL("wrong number of groups", 2 == evlist->nr_groups);


	/* group1 syscalls:sys_enter_open:H */
	/* group1 syscalls:sys_enter_openat:H */
	evsel = leader = perf_evlist__first(evlist);
	evsel = leader = perf_evlist__first(evlist);
	TEST_ASSERT_VAL("wrong type", PERF_TYPE_TRACEPOINT == evsel->attr.type);
	TEST_ASSERT_VAL("wrong type", PERF_TYPE_TRACEPOINT == evsel->attr.type);
	TEST_ASSERT_VAL("wrong sample_type",
	TEST_ASSERT_VAL("wrong sample_type",
@@ -1293,7 +1293,7 @@ struct evlist_test {


static struct evlist_test test__events[] = {
static struct evlist_test test__events[] = {
	{
	{
		.name  = "syscalls:sys_enter_open",
		.name  = "syscalls:sys_enter_openat",
		.check = test__checkevent_tracepoint,
		.check = test__checkevent_tracepoint,
		.id    = 0,
		.id    = 0,
	},
	},
@@ -1353,7 +1353,7 @@ static struct evlist_test test__events[] = {
		.id    = 11,
		.id    = 11,
	},
	},
	{
	{
		.name  = "syscalls:sys_enter_open:k",
		.name  = "syscalls:sys_enter_openat:k",
		.check = test__checkevent_tracepoint_modifier,
		.check = test__checkevent_tracepoint_modifier,
		.id    = 12,
		.id    = 12,
	},
	},
@@ -1408,7 +1408,7 @@ static struct evlist_test test__events[] = {
		.id    = 22,
		.id    = 22,
	},
	},
	{
	{
		.name  = "r1,syscalls:sys_enter_open:k,1:1:hp",
		.name  = "r1,syscalls:sys_enter_openat:k,1:1:hp",
		.check = test__checkevent_list,
		.check = test__checkevent_list,
		.id    = 23,
		.id    = 23,
	},
	},
@@ -1443,7 +1443,7 @@ static struct evlist_test test__events[] = {
		.id    = 29,
		.id    = 29,
	},
	},
	{
	{
		.name  = "group1{syscalls:sys_enter_open:H,cycles:kppp},group2{cycles,1:3}:G,instructions:u",
		.name  = "group1{syscalls:sys_enter_openat:H,cycles:kppp},group2{cycles,1:3}:G,instructions:u",
		.check = test__group3,
		.check = test__group3,
		.id    = 30,
		.id    = 30,
	},
	},
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