[PATCH v1 2/3] perf test: Remove C test wrapper for attr.py
From: Ian Rogers
Date: Tue Oct 01 2024 - 13:21:05 EST
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.
Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
---
tools/perf/perf.c | 2 -
tools/perf/tests/Build | 1 -
tools/perf/tests/attr.c | 218 --------------------------------
tools/perf/tests/builtin-test.c | 1 -
tools/perf/tests/tests.h | 1 -
tools/perf/util/evsel.c | 122 +++++++++++++++++-
tools/perf/util/util.h | 7 -
7 files changed, 118 insertions(+), 234 deletions(-)
delete mode 100644 tools/perf/tests/attr.c
diff --git a/tools/perf/perf.c b/tools/perf/perf.c
index 4def800f4089..a2987f2cfe1a 100644
--- a/tools/perf/perf.c
+++ b/tools/perf/perf.c
@@ -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
diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build
index 5671ee530019..5476199adc67 100644
--- a/tools/perf/tests/Build
+++ b/tools/perf/tests/Build
@@ -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
diff --git a/tools/perf/tests/attr.c b/tools/perf/tests/attr.c
deleted file mode 100644
index 97e1bdd6ec0e..000000000000
--- a/tools/perf/tests/attr.c
+++ /dev/null
@@ -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);
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index 470a9709427d..4f8b4e3260b4 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -79,7 +79,6 @@ 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,
diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index 6ea2be86b7bf..b246db5abf83 100644
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -83,7 +83,6 @@ DECLARE_SUITE(perf_evsel__tp_sched_test);
DECLARE_SUITE(syscall_openat_tp_fields);
DECLARE_SUITE(pmu);
DECLARE_SUITE(pmu_events);
-DECLARE_SUITE(attr);
DECLARE_SUITE(dso_data);
DECLARE_SUITE(dso_data_cache);
DECLARE_SUITE(dso_data_reopen);
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index edfb376f0611..0a5c9cd6b30f 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -103,7 +103,123 @@ 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)
{
@@ -2366,8 +2482,6 @@ 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);
@@ -2388,7 +2502,7 @@ 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);
diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h
index 9966c21aaf04..14f2c70906be 100644
--- a/tools/perf/util/util.h
+++ b/tools/perf/util/util.h
@@ -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;
--
2.46.1.824.gd892dcdcdd-goog