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perf test: Remove C test wrapper for attr.py

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Remove the C wrapper now a shell script wrapper exists. Move
perf_event_attr dumping functions to evsel.c and reduce the scope of
variables/defines. Use fprintf to avoid snprintf complexities in
WRITE_ASS.

Add __SANE_USERSPACE_TYPES__ to evsel.c to fix format flag issues on
PowerPC triggered by moving attr.c functions to evsel.c.

Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: zhaimingbing <zhaimingbing@cmss.chinamobile.com>
Cc: Howard Chu <howardchu95@gmail.com>
Cc: Ze Gao <zegao2021@gmail.com>
Cc: Weilin Wang <weilin.wang@intel.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Cc: Veronika Molnarova <vmolnaro@redhat.com>
Link: https://lore.kernel.org/r/20241015000158.871828-3-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
This commit is contained in:
Ian Rogers 2024-10-14 17:01:57 -07:00 committed by Namhyung Kim
parent 8519e4f44c
commit 3a447031f5
6 changed files with 123 additions and 233 deletions
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2
tools/perf/perf.c
View File

@ -542,8 +542,6 @@ int main(int argc, const char **argv)
}
cmd = argv[0];
test_attr__init();
/*
* We use PATH to find perf commands, but we prepend some higher
* precedence paths: the "--exec-path" option, the PERF_EXEC_PATH

1
tools/perf/tests/Build
View File

@ -4,7 +4,6 @@ perf-test-y += builtin-test.o
perf-test-y += tests-scripts.o
perf-test-y += parse-events.o
perf-test-y += dso-data.o
perf-test-y += attr.o
perf-test-y += vmlinux-kallsyms.o
perf-test-$(CONFIG_LIBTRACEEVENT) += openat-syscall.o
perf-test-$(CONFIG_LIBTRACEEVENT) += openat-syscall-all-cpus.o

218
tools/perf/tests/attr.c
View File

@ -1,218 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
/*
* The struct perf_event_attr test support.
*
* This test is embedded inside into perf directly and is governed
* by the PERF_TEST_ATTR environment variable and hook inside
* sys_perf_event_open function.
*
* The general idea is to store 'struct perf_event_attr' details for
* each event created within single perf command. Each event details
* are stored into separate text file. Once perf command is finished
* these files can be checked for values we expect for command.
*
* Besides 'struct perf_event_attr' values we also store 'fd' and
* 'group_fd' values to allow checking for groups created.
*
* This all is triggered by setting PERF_TEST_ATTR environment variable.
* It must contain name of existing directory with access and write
* permissions. All the event text files are stored there.
*/
#include <debug.h>
#include <errno.h>
#include <inttypes.h>
#include <stdlib.h>
#include <stdio.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <subcmd/exec-cmd.h>
#include "event.h"
#include "util.h"
#include "tests.h"
#include "pmus.h"
#define ENV "PERF_TEST_ATTR"
static char *dir;
static bool ready;
void test_attr__init(void)
{
dir = getenv(ENV);
test_attr__enabled = (dir != NULL);
}
#define BUFSIZE 1024
#define __WRITE_ASS(str, fmt, data) \
do { \
char buf[BUFSIZE]; \
size_t size; \
\
size = snprintf(buf, BUFSIZE, #str "=%"fmt "\n", data); \
if (1 != fwrite(buf, size, 1, file)) { \
perror("test attr - failed to write event file"); \
fclose(file); \
return -1; \
} \
\
} while (0)
#define WRITE_ASS(field, fmt) __WRITE_ASS(field, fmt, attr->field)
static int store_event(struct perf_event_attr *attr, pid_t pid, struct perf_cpu cpu,
int fd, int group_fd, unsigned long flags)
{
FILE *file;
char path[PATH_MAX];
if (!ready)
return 0;
snprintf(path, PATH_MAX, "%s/event-%d-%llu-%d", dir,
attr->type, attr->config, fd);
file = fopen(path, "w+");
if (!file) {
perror("test attr - failed to open event file");
return -1;
}
if (fprintf(file, "[event-%d-%llu-%d]\n",
attr->type, attr->config, fd) < 0) {
perror("test attr - failed to write event file");
fclose(file);
return -1;
}
/* syscall arguments */
__WRITE_ASS(fd, "d", fd);
__WRITE_ASS(group_fd, "d", group_fd);
__WRITE_ASS(cpu, "d", cpu.cpu);
__WRITE_ASS(pid, "d", pid);
__WRITE_ASS(flags, "lu", flags);
/* struct perf_event_attr */
WRITE_ASS(type, PRIu32);
WRITE_ASS(size, PRIu32);
WRITE_ASS(config, "llu");
WRITE_ASS(sample_period, "llu");
WRITE_ASS(sample_type, "llu");
WRITE_ASS(read_format, "llu");
WRITE_ASS(disabled, "d");
WRITE_ASS(inherit, "d");
WRITE_ASS(pinned, "d");
WRITE_ASS(exclusive, "d");
WRITE_ASS(exclude_user, "d");
WRITE_ASS(exclude_kernel, "d");
WRITE_ASS(exclude_hv, "d");
WRITE_ASS(exclude_idle, "d");
WRITE_ASS(mmap, "d");
WRITE_ASS(comm, "d");
WRITE_ASS(freq, "d");
WRITE_ASS(inherit_stat, "d");
WRITE_ASS(enable_on_exec, "d");
WRITE_ASS(task, "d");
WRITE_ASS(watermark, "d");
WRITE_ASS(precise_ip, "d");
WRITE_ASS(mmap_data, "d");
WRITE_ASS(sample_id_all, "d");
WRITE_ASS(exclude_host, "d");
WRITE_ASS(exclude_guest, "d");
WRITE_ASS(exclude_callchain_kernel, "d");
WRITE_ASS(exclude_callchain_user, "d");
WRITE_ASS(mmap2, "d");
WRITE_ASS(comm_exec, "d");
WRITE_ASS(context_switch, "d");
WRITE_ASS(write_backward, "d");
WRITE_ASS(namespaces, "d");
WRITE_ASS(use_clockid, "d");
WRITE_ASS(wakeup_events, PRIu32);
WRITE_ASS(bp_type, PRIu32);
WRITE_ASS(config1, "llu");
WRITE_ASS(config2, "llu");
WRITE_ASS(branch_sample_type, "llu");
WRITE_ASS(sample_regs_user, "llu");
WRITE_ASS(sample_stack_user, PRIu32);
fclose(file);
return 0;
}
void test_attr__open(struct perf_event_attr *attr, pid_t pid, struct perf_cpu cpu,
int fd, int group_fd, unsigned long flags)
{
int errno_saved = errno;
if ((fd != -1) && store_event(attr, pid, cpu, fd, group_fd, flags)) {
pr_err("test attr FAILED");
exit(128);
}
errno = errno_saved;
}
void test_attr__ready(void)
{
if (unlikely(test_attr__enabled) && !ready)
ready = true;
}
static int run_dir(const char *d, const char *perf)
{
char v[] = "-vvvvv";
int vcnt = min(verbose, (int) sizeof(v) - 1);
char cmd[3*PATH_MAX];
if (verbose > 0)
vcnt++;
scnprintf(cmd, 3*PATH_MAX, PYTHON " %s/attr.py -d %s/attr/ -p %s %.*s",
d, d, perf, vcnt, v);
return system(cmd) ? TEST_FAIL : TEST_OK;
}
static int test__attr(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
{
struct stat st;
char path_perf[PATH_MAX];
char path_dir[PATH_MAX];
char *exec_path;
if (perf_pmus__num_core_pmus() > 1) {
/*
* TODO: Attribute tests hard code the PMU type. If there are >1
* core PMU then each PMU will have a different type which
* requires additional support.
*/
pr_debug("Skip test on hybrid systems");
return TEST_SKIP;
}
/* First try development tree tests. */
if (!lstat("./tests", &st))
return run_dir("./tests", "./perf");
exec_path = get_argv_exec_path();
if (exec_path == NULL)
return -1;
/* Then installed path. */
snprintf(path_dir, PATH_MAX, "%s/tests", exec_path);
snprintf(path_perf, PATH_MAX, "%s/perf", BINDIR);
free(exec_path);
if (!lstat(path_dir, &st) &&
!lstat(path_perf, &st))
return run_dir(path_dir, path_perf);
return TEST_SKIP;
}
DEFINE_SUITE("Setup struct perf_event_attr", attr);

1
tools/perf/tests/builtin-test.c
View File

@ -80,7 +80,6 @@ static struct test_suite *generic_tests[] = {
&suite__perf_evsel__tp_sched_test,
&suite__syscall_openat_tp_fields,
#endif
&suite__attr,
&suite__hists_link,
&suite__python_use,
&suite__bp_signal,

127
tools/perf/util/evsel.c
View File

@ -5,6 +5,11 @@
* Parts came from builtin-{top,stat,record}.c, see those files for further
* copyright notes.
*/
/*
* Powerpc needs __SANE_USERSPACE_TYPES__ before <linux/types.h> to select
* 'int-ll64.h' and avoid compile warnings when printing __u64 with %llu.
*/
#define __SANE_USERSPACE_TYPES__
#include <byteswap.h>
#include <errno.h>
@ -76,7 +81,123 @@ static int evsel__no_extra_init(struct evsel *evsel __maybe_unused)
return 0;
}
void __weak test_attr__ready(void) { }
static bool test_attr__enabled(void)
{
static bool test_attr__enabled;
static bool test_attr__enabled_tested;
if (!test_attr__enabled_tested) {
char *dir = getenv("PERF_TEST_ATTR");
test_attr__enabled = (dir != NULL);
test_attr__enabled_tested = true;
}
return test_attr__enabled;
}
#define __WRITE_ASS(str, fmt, data) \
do { \
if (fprintf(file, #str "=%"fmt "\n", data) < 0) { \
perror("test attr - failed to write event file"); \
fclose(file); \
return -1; \
} \
} while (0)
#define WRITE_ASS(field, fmt) __WRITE_ASS(field, fmt, attr->field)
static int store_event(struct perf_event_attr *attr, pid_t pid, struct perf_cpu cpu,
int fd, int group_fd, unsigned long flags)
{
FILE *file;
char path[PATH_MAX];
char *dir = getenv("PERF_TEST_ATTR");
snprintf(path, PATH_MAX, "%s/event-%d-%llu-%d", dir,
attr->type, attr->config, fd);
file = fopen(path, "w+");
if (!file) {
perror("test attr - failed to open event file");
return -1;
}
if (fprintf(file, "[event-%d-%llu-%d]\n",
attr->type, attr->config, fd) < 0) {
perror("test attr - failed to write event file");
fclose(file);
return -1;
}
/* syscall arguments */
__WRITE_ASS(fd, "d", fd);
__WRITE_ASS(group_fd, "d", group_fd);
__WRITE_ASS(cpu, "d", cpu.cpu);
__WRITE_ASS(pid, "d", pid);
__WRITE_ASS(flags, "lu", flags);
/* struct perf_event_attr */
WRITE_ASS(type, PRIu32);
WRITE_ASS(size, PRIu32);
WRITE_ASS(config, "llu");
WRITE_ASS(sample_period, "llu");
WRITE_ASS(sample_type, "llu");
WRITE_ASS(read_format, "llu");
WRITE_ASS(disabled, "d");
WRITE_ASS(inherit, "d");
WRITE_ASS(pinned, "d");
WRITE_ASS(exclusive, "d");
WRITE_ASS(exclude_user, "d");
WRITE_ASS(exclude_kernel, "d");
WRITE_ASS(exclude_hv, "d");
WRITE_ASS(exclude_idle, "d");
WRITE_ASS(mmap, "d");
WRITE_ASS(comm, "d");
WRITE_ASS(freq, "d");
WRITE_ASS(inherit_stat, "d");
WRITE_ASS(enable_on_exec, "d");
WRITE_ASS(task, "d");
WRITE_ASS(watermark, "d");
WRITE_ASS(precise_ip, "d");
WRITE_ASS(mmap_data, "d");
WRITE_ASS(sample_id_all, "d");
WRITE_ASS(exclude_host, "d");
WRITE_ASS(exclude_guest, "d");
WRITE_ASS(exclude_callchain_kernel, "d");
WRITE_ASS(exclude_callchain_user, "d");
WRITE_ASS(mmap2, "d");
WRITE_ASS(comm_exec, "d");
WRITE_ASS(context_switch, "d");
WRITE_ASS(write_backward, "d");
WRITE_ASS(namespaces, "d");
WRITE_ASS(use_clockid, "d");
WRITE_ASS(wakeup_events, PRIu32);
WRITE_ASS(bp_type, PRIu32);
WRITE_ASS(config1, "llu");
WRITE_ASS(config2, "llu");
WRITE_ASS(branch_sample_type, "llu");
WRITE_ASS(sample_regs_user, "llu");
WRITE_ASS(sample_stack_user, PRIu32);
fclose(file);
return 0;
}
#undef __WRITE_ASS
#undef WRITE_ASS
static void test_attr__open(struct perf_event_attr *attr, pid_t pid, struct perf_cpu cpu,
int fd, int group_fd, unsigned long flags)
{
int errno_saved = errno;
if ((fd != -1) && store_event(attr, pid, cpu, fd, group_fd, flags)) {
pr_err("test attr FAILED");
exit(128);
}
errno = errno_saved;
}
static void evsel__no_extra_fini(struct evsel *evsel __maybe_unused)
{
@ -2145,8 +2266,6 @@ static int evsel__open_cpu(struct evsel *evsel, struct perf_cpu_map *cpus,
goto out_close;
}
test_attr__ready();
/* Debug message used by test scripts */
pr_debug2_peo("sys_perf_event_open: pid %d cpu %d group_fd %d flags %#lx",
pid, perf_cpu_map__cpu(cpus, idx).cpu, group_fd, evsel->open_flags);
@ -2167,7 +2286,7 @@ static int evsel__open_cpu(struct evsel *evsel, struct perf_cpu_map *cpus,
bpf_counter__install_pe(evsel, idx, fd);
if (unlikely(test_attr__enabled)) {
if (unlikely(test_attr__enabled())) {
test_attr__open(&evsel->core.attr, pid,
perf_cpu_map__cpu(cpus, idx),
fd, group_fd, evsel->open_flags);

7
tools/perf/util/util.h
View File

@ -81,13 +81,6 @@ char *perf_exe(char *buf, int len);
#endif
#endif
extern bool test_attr__enabled;
void test_attr__ready(void);
void test_attr__init(void);
struct perf_event_attr;
void test_attr__open(struct perf_event_attr *attr, pid_t pid, struct perf_cpu cpu,
int fd, int group_fd, unsigned long flags);
struct perf_debuginfod {
const char *urls;
bool set;