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perf tests: Add dlfilter test

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Add a perf test to test the dlfilter C API.

A perf.data file is synthesized and then processed by perf script with a
dlfilter named dlfilter-test-api-v0.so. Also a C file is compiled to
provide a dso to match the synthesized perf.data file.

Committer testing:

  [root@five ~]# perf test dlfilter
  72: dlfilter C API                                                  : Ok
  [root@five ~]# perf test -v dlfilter
  72: dlfilter C API                                                  :
  --- start ---
  test child forked, pid 3387712
  Checking for gcc
  Command: gcc --version
  gcc (GCC) 11.1.1 20210531 (Red Hat 11.1.1-3)
  Copyright (C) 2021 Free Software Foundation, Inc.
  This is free software; see the source for copying conditions.  There is NO
  warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

  dlfilters path: /var/home/acme/libexec/perf-core/dlfilters
  Command: gcc -g -o /tmp/dlfilter-test-3387712-prog /tmp/dlfilter-test-3387712-prog.c
  Creating new host machine structure
  Command: /var/home/acme/bin/perf script -i /tmp/dlfilter-test-3387712-perf-data --dlfilter /var/home/acme/libexec/perf-core/dlfilters/dlfilter-test-api-v0.so --dlarg first --dlarg 1 --dlarg 4198669 --dlarg 4198662 --dlarg 0 --dlarg last
  start API
  filter_event_early API
  filter_event API
  stop API
  Command: /var/home/acme/bin/perf script -i /tmp/dlfilter-test-3387712-perf-data --dlfilter /var/home/acme/libexec/perf-core/dlfilters/dlfilter-test-api-v0.so --dlarg first --dlarg 1 --dlarg 4198669 --dlarg 4198662 --dlarg 1 --dlarg last
  start API
  filter_event_early API
  filter_event API
  stop API
  Command: /var/home/acme/bin/perf script -i /tmp/dlfilter-test-3387712-perf-data --dlfilter /var/home/acme/libexec/perf-core/dlfilters/dlfilter-test-api-v0.so --dlarg first --dlarg 1 --dlarg 4198669 --dlarg 4198662 --dlarg 2 --dlarg last
  start API
  filter_event_early API
  stop API
  test child finished with 0
  ---- end ----
  dlfilter C API: Ok
  [root@five ~]#

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: https //lore.kernel.org/r/20210811101036.17986-7-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2021-08-11 13:10:36 +03:00 committed by Arnaldo Carvalho de Melo
parent 3af1dfdd51
commit 9f9c9a8de2
8 changed files with 771 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
tools/perf/Makefile.perf
View File

@ -360,8 +360,11 @@ ifndef NO_JVMTI
PROGRAMS += $(OUTPUT)$(LIBJVMTI)
endif
DLFILTERS := dlfilter-test-api-v0.so
DLFILTERS := $(patsubst %,$(OUTPUT)dlfilters/%,$(DLFILTERS))
# what 'all' will build and 'install' will install, in perfexecdir
ALL_PROGRAMS = $(PROGRAMS) $(SCRIPTS)
ALL_PROGRAMS = $(PROGRAMS) $(SCRIPTS) $(DLFILTERS)
# what 'all' will build but not install in perfexecdir
OTHER_PROGRAMS = $(OUTPUT)perf
@ -780,6 +783,13 @@ $(OUTPUT)perf-read-vdsox32: perf-read-vdso.c util/find-map.c
$(QUIET_CC)$(CC) -mx32 $(filter -static,$(LDFLAGS)) -Wall -Werror -o $@ perf-read-vdso.c
endif
$(OUTPUT)dlfilters/%.o: dlfilters/%.c include/perf/perf_dlfilter.h
$(Q)$(MKDIR) -p $(OUTPUT)dlfilters
$(QUIET_CC)$(CC) -c -Iinclude -o $@ -fpic $<
$(OUTPUT)dlfilters/%.so: $(OUTPUT)dlfilters/%.o
$(QUIET_LINK)$(CC) -shared -o $@ $<
ifndef NO_JVMTI
LIBJVMTI_IN := $(OUTPUT)jvmti/jvmti-in.o
@ -978,6 +988,9 @@ ifndef NO_LIBPYTHON
$(INSTALL) scripts/python/*.py -m 644 -t '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/scripts/python'; \
$(INSTALL) scripts/python/bin/* -t '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/scripts/python/bin'
endif
$(call QUIET_INSTALL, dlfilters) \
$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/dlfilters'; \
$(INSTALL) $(DLFILTERS) '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/dlfilters';
$(call QUIET_INSTALL, perf_completion-script) \
$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(sysconfdir_SQ)/bash_completion.d'; \
$(INSTALL) perf-completion.sh '$(DESTDIR_SQ)$(sysconfdir_SQ)/bash_completion.d/perf'

336
tools/perf/dlfilters/dlfilter-test-api-v0.c Normal file
View File

@ -0,0 +1,336 @@
// SPDX-License-Identifier: GPL-2.0
/*
* dlfilter-test-api-v0.c: test original (v0) API for perf --dlfilter shared object
* Copyright (c) 2021, Intel Corporation.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
/*
* Copy original (v0) API instead of including current API
*/
#include <linux/perf_event.h>
#include <linux/types.h>
/* Definitions for perf_dlfilter_sample flags */
enum {
PERF_DLFILTER_FLAG_BRANCH = 1ULL << 0,
PERF_DLFILTER_FLAG_CALL = 1ULL << 1,
PERF_DLFILTER_FLAG_RETURN = 1ULL << 2,
PERF_DLFILTER_FLAG_CONDITIONAL = 1ULL << 3,
PERF_DLFILTER_FLAG_SYSCALLRET = 1ULL << 4,
PERF_DLFILTER_FLAG_ASYNC = 1ULL << 5,
PERF_DLFILTER_FLAG_INTERRUPT = 1ULL << 6,
PERF_DLFILTER_FLAG_TX_ABORT = 1ULL << 7,
PERF_DLFILTER_FLAG_TRACE_BEGIN = 1ULL << 8,
PERF_DLFILTER_FLAG_TRACE_END = 1ULL << 9,
PERF_DLFILTER_FLAG_IN_TX = 1ULL << 10,
PERF_DLFILTER_FLAG_VMENTRY = 1ULL << 11,
PERF_DLFILTER_FLAG_VMEXIT = 1ULL << 12,
};
/*
* perf sample event information (as per perf script and <linux/perf_event.h>)
*/
struct perf_dlfilter_sample {
__u32 size; /* Size of this structure (for compatibility checking) */
__u16 ins_lat; /* Refer PERF_SAMPLE_WEIGHT_TYPE in <linux/perf_event.h> */
__u16 p_stage_cyc; /* Refer PERF_SAMPLE_WEIGHT_TYPE in <linux/perf_event.h> */
__u64 ip;
__s32 pid;
__s32 tid;
__u64 time;
__u64 addr;
__u64 id;
__u64 stream_id;
__u64 period;
__u64 weight; /* Refer PERF_SAMPLE_WEIGHT_TYPE in <linux/perf_event.h> */
__u64 transaction; /* Refer PERF_SAMPLE_TRANSACTION in <linux/perf_event.h> */
__u64 insn_cnt; /* For instructions-per-cycle (IPC) */
__u64 cyc_cnt; /* For instructions-per-cycle (IPC) */
__s32 cpu;
__u32 flags; /* Refer PERF_DLFILTER_FLAG_* above */
__u64 data_src; /* Refer PERF_SAMPLE_DATA_SRC in <linux/perf_event.h> */
__u64 phys_addr; /* Refer PERF_SAMPLE_PHYS_ADDR in <linux/perf_event.h> */
__u64 data_page_size; /* Refer PERF_SAMPLE_DATA_PAGE_SIZE in <linux/perf_event.h> */
__u64 code_page_size; /* Refer PERF_SAMPLE_CODE_PAGE_SIZE in <linux/perf_event.h> */
__u64 cgroup; /* Refer PERF_SAMPLE_CGROUP in <linux/perf_event.h> */
__u8 cpumode; /* Refer CPUMODE_MASK etc in <linux/perf_event.h> */
__u8 addr_correlates_sym; /* True => resolve_addr() can be called */
__u16 misc; /* Refer perf_event_header in <linux/perf_event.h> */
__u32 raw_size; /* Refer PERF_SAMPLE_RAW in <linux/perf_event.h> */
const void *raw_data; /* Refer PERF_SAMPLE_RAW in <linux/perf_event.h> */
__u64 brstack_nr; /* Number of brstack entries */
const struct perf_branch_entry *brstack; /* Refer <linux/perf_event.h> */
__u64 raw_callchain_nr; /* Number of raw_callchain entries */
const __u64 *raw_callchain; /* Refer <linux/perf_event.h> */
const char *event;
};
/*
* Address location (as per perf script)
*/
struct perf_dlfilter_al {
__u32 size; /* Size of this structure (for compatibility checking) */
__u32 symoff;
const char *sym;
__u64 addr; /* Mapped address (from dso) */
__u64 sym_start;
__u64 sym_end;
const char *dso;
__u8 sym_binding; /* STB_LOCAL, STB_GLOBAL or STB_WEAK, refer <elf.h> */
__u8 is_64_bit; /* Only valid if dso is not NULL */
__u8 is_kernel_ip; /* True if in kernel space */
__u32 buildid_size;
__u8 *buildid;
/* Below members are only populated by resolve_ip() */
__u8 filtered; /* True if this sample event will be filtered out */
const char *comm;
};
struct perf_dlfilter_fns {
/* Return information about ip */
const struct perf_dlfilter_al *(*resolve_ip)(void *ctx);
/* Return information about addr (if addr_correlates_sym) */
const struct perf_dlfilter_al *(*resolve_addr)(void *ctx);
/* Return arguments from --dlarg option */
char **(*args)(void *ctx, int *dlargc);
/*
* Return information about address (al->size must be set before
* calling). Returns 0 on success, -1 otherwise.
*/
__s32 (*resolve_address)(void *ctx, __u64 address, struct perf_dlfilter_al *al);
/* Return instruction bytes and length */
const __u8 *(*insn)(void *ctx, __u32 *length);
/* Return source file name and line number */
const char *(*srcline)(void *ctx, __u32 *line_number);
/* Return perf_event_attr, refer <linux/perf_event.h> */
struct perf_event_attr *(*attr)(void *ctx);
/* Read object code, return numbers of bytes read */
__s32 (*object_code)(void *ctx, __u64 ip, void *buf, __u32 len);
/* Reserved */
void *(*reserved[120])(void *);
};
struct perf_dlfilter_fns perf_dlfilter_fns;
static int verbose;
#define pr_debug(fmt, ...) do { \
if (verbose) \
fprintf(stderr, fmt, ##__VA_ARGS__); \
} while (0)
static int test_fail(const char *msg)
{
pr_debug("%s\n", msg);
return -1;
}
#define CHECK(x) do { \
if (!(x)) \
return test_fail("Check '" #x "' failed\n"); \
} while (0)
struct filter_data {
__u64 ip;
__u64 addr;
int do_early;
int early_filter_cnt;
int filter_cnt;
};
static struct filter_data *filt_dat;
int start(void **data, void *ctx)
{
int dlargc;
char **dlargv;
struct filter_data *d;
static bool called;
verbose = 1;
CHECK(!filt_dat && !called);
called = true;
d = calloc(1, sizeof(*d));
if (!d)
test_fail("Failed to allocate memory");
filt_dat = d;
*data = d;
dlargv = perf_dlfilter_fns.args(ctx, &dlargc);
CHECK(dlargc == 6);
CHECK(!strcmp(dlargv[0], "first"));
verbose = strtol(dlargv[1], NULL, 0);
d->ip = strtoull(dlargv[2], NULL, 0);
d->addr = strtoull(dlargv[3], NULL, 0);
d->do_early = strtol(dlargv[4], NULL, 0);
CHECK(!strcmp(dlargv[5], "last"));
pr_debug("%s API\n", __func__);
return 0;
}
#define CHECK_SAMPLE(x) do { \
if (sample->x != expected.x) \
return test_fail("'" #x "' not expected value\n"); \
} while (0)
static int check_sample(struct filter_data *d, const struct perf_dlfilter_sample *sample)
{
struct perf_dlfilter_sample expected = {
.ip = d->ip,
.pid = 12345,
.tid = 12346,
.time = 1234567890,
.addr = d->addr,
.id = 99,
.stream_id = 101,
.period = 543212345,
.cpu = 31,
.cpumode = PERF_RECORD_MISC_USER,
.addr_correlates_sym = 1,
.misc = PERF_RECORD_MISC_USER,
};
CHECK(sample->size >= sizeof(struct perf_dlfilter_sample));
CHECK_SAMPLE(ip);
CHECK_SAMPLE(pid);
CHECK_SAMPLE(tid);
CHECK_SAMPLE(time);
CHECK_SAMPLE(addr);
CHECK_SAMPLE(id);
CHECK_SAMPLE(stream_id);
CHECK_SAMPLE(period);
CHECK_SAMPLE(cpu);
CHECK_SAMPLE(cpumode);
CHECK_SAMPLE(addr_correlates_sym);
CHECK_SAMPLE(misc);
CHECK(!sample->raw_data);
CHECK_SAMPLE(brstack_nr);
CHECK(!sample->brstack);
CHECK_SAMPLE(raw_callchain_nr);
CHECK(!sample->raw_callchain);
#define EVENT_NAME "branches:"
CHECK(!strncmp(sample->event, EVENT_NAME, strlen(EVENT_NAME)));
return 0;
}
static int check_al(void *ctx)
{
const struct perf_dlfilter_al *al;
al = perf_dlfilter_fns.resolve_ip(ctx);
if (!al)
return test_fail("resolve_ip() failed");
CHECK(al->sym && !strcmp("foo", al->sym));
CHECK(!al->symoff);
return 0;
}
static int check_addr_al(void *ctx)
{
const struct perf_dlfilter_al *addr_al;
addr_al = perf_dlfilter_fns.resolve_addr(ctx);
if (!addr_al)
return test_fail("resolve_addr() failed");
CHECK(addr_al->sym && !strcmp("bar", addr_al->sym));
CHECK(!addr_al->symoff);
return 0;
}
static int check_attr(void *ctx)
{
struct perf_event_attr *attr = perf_dlfilter_fns.attr(ctx);
CHECK(attr);
CHECK(attr->type == PERF_TYPE_HARDWARE);
CHECK(attr->config == PERF_COUNT_HW_BRANCH_INSTRUCTIONS);
return 0;
}
static int do_checks(void *data, const struct perf_dlfilter_sample *sample, void *ctx, bool early)
{
struct filter_data *d = data;
CHECK(data && filt_dat == data);
if (early) {
CHECK(!d->early_filter_cnt);
d->early_filter_cnt += 1;
} else {
CHECK(!d->filter_cnt);
CHECK(d->early_filter_cnt);
CHECK(d->do_early != 2);
d->filter_cnt += 1;
}
if (check_sample(data, sample))
return -1;
if (check_attr(ctx))
return -1;
if (early && !d->do_early)
return 0;
if (check_al(ctx) || check_addr_al(ctx))
return -1;
if (early)
return d->do_early == 2;
return 1;
}
int filter_event_early(void *data, const struct perf_dlfilter_sample *sample, void *ctx)
{
pr_debug("%s API\n", __func__);
return do_checks(data, sample, ctx, true);
}
int filter_event(void *data, const struct perf_dlfilter_sample *sample, void *ctx)
{
struct filter_data *d = data;
pr_debug("%s API\n", __func__);
return do_checks(data, sample, ctx, false);
}
int stop(void *data, void *ctx)
{
static bool called;
pr_debug("%s API\n", __func__);
CHECK(data && filt_dat == data && !called);
called = true;
free(data);
filt_dat = NULL;
return 0;
}
const char *filter_description(const char **long_description)
{
*long_description = "Filter used by the 'dlfilter C API' perf test";
return "dlfilter to test v0 C API";
}

1
tools/perf/tests/Build
View File

@ -64,6 +64,7 @@ perf-y += parse-metric.o
perf-y += pe-file-parsing.o
perf-y += expand-cgroup.o
perf-y += perf-time-to-tsc.o
perf-y += dlfilter-test.o
$(OUTPUT)tests/llvm-src-base.c: tests/bpf-script-example.c tests/Build
$(call rule_mkdir)

4
tools/perf/tests/builtin-test.c
View File

@ -360,6 +360,10 @@ static struct test generic_tests[] = {
.func = test__perf_time_to_tsc,
.is_supported = test__tsc_is_supported,
},
{
.desc = "dlfilter C API",
.func = test__dlfilter,
},
{
.func = NULL,
},

411
tools/perf/tests/dlfilter-test.c Normal file
View File

@ -0,0 +1,411 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Test dlfilter C API. A perf.data file is synthesized and then processed
* by perf script with a dlfilter named dlfilter-test-api-v0.so. Also a C file
* is compiled to provide a dso to match the synthesized perf.data file.
*/
#include <linux/compiler.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/perf_event.h>
#include <internal/lib.h>
#include <subcmd/exec-cmd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <inttypes.h>
#include <libgen.h>
#include <string.h>
#include <errno.h>
#include "debug.h"
#include "tool.h"
#include "event.h"
#include "header.h"
#include "machine.h"
#include "dso.h"
#include "map.h"
#include "symbol.h"
#include "synthetic-events.h"
#include "util.h"
#include "archinsn.h"
#include "dlfilter.h"
#include "tests.h"
#define MAP_START 0x400000
struct test_data {
struct perf_tool tool;
struct machine *machine;
int fd;
u64 foo;
u64 bar;
u64 ip;
u64 addr;
char perf[PATH_MAX];
char perf_data_file_name[PATH_MAX];
char c_file_name[PATH_MAX];
char prog_file_name[PATH_MAX];
char dlfilters[PATH_MAX];
};
static int test_result(const char *msg, int ret)
{
pr_debug("%s\n", msg);
return ret;
}
static int process(struct perf_tool *tool, union perf_event *event,
struct perf_sample *sample __maybe_unused,
struct machine *machine __maybe_unused)
{
struct test_data *td = container_of(tool, struct test_data, tool);
int fd = td->fd;
if (writen(fd, event, event->header.size) != event->header.size)
return -1;
return 0;
}
#define MAXCMD 4096
#define REDIRECT_TO_DEV_NULL " >/dev/null 2>&1"
static __printf(1, 2) int system_cmd(const char *fmt, ...)
{
char cmd[MAXCMD + sizeof(REDIRECT_TO_DEV_NULL)];
int ret;
va_list args;
va_start(args, fmt);
ret = vsnprintf(cmd, MAXCMD, fmt, args);
va_end(args);
if (ret <= 0 || ret >= MAXCMD)
return -1;
if (!verbose)
strcat(cmd, REDIRECT_TO_DEV_NULL);
pr_debug("Command: %s\n", cmd);
ret = system(cmd);
if (ret)
pr_debug("Failed with return value %d\n", ret);
return ret;
}
static bool have_gcc(void)
{
pr_debug("Checking for gcc\n");
return !system_cmd("gcc --version");
}
static int write_attr(struct test_data *td, u64 sample_type, u64 *id)
{
struct perf_event_attr attr = {
.size = sizeof(attr),
.type = PERF_TYPE_HARDWARE,
.config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS,
.sample_type = sample_type,
.sample_period = 1,
};
return perf_event__synthesize_attr(&td->tool, &attr, 1, id, process);
}
static int write_comm(int fd, pid_t pid, pid_t tid, const char *comm_str)
{
struct perf_record_comm comm;
ssize_t sz = sizeof(comm);
comm.header.type = PERF_RECORD_COMM;
comm.header.misc = PERF_RECORD_MISC_USER;
comm.header.size = sz;
comm.pid = pid;
comm.tid = tid;
strncpy(comm.comm, comm_str, 16);
if (writen(fd, &comm, sz) != sz) {
pr_debug("%s failed\n", __func__);
return -1;
}
return 0;
}
static int write_mmap(int fd, pid_t pid, pid_t tid, u64 start, u64 len, u64 pgoff,
const char *filename)
{
char buf[PERF_SAMPLE_MAX_SIZE];
struct perf_record_mmap *mmap = (struct perf_record_mmap *)buf;
size_t fsz = roundup(strlen(filename) + 1, 8);
ssize_t sz = sizeof(*mmap) - sizeof(mmap->filename) + fsz;
mmap->header.type = PERF_RECORD_MMAP;
mmap->header.misc = PERF_RECORD_MISC_USER;
mmap->header.size = sz;
mmap->pid = pid;
mmap->tid = tid;
mmap->start = start;
mmap->len = len;
mmap->pgoff = pgoff;
strncpy(mmap->filename, filename, sizeof(mmap->filename));
if (writen(fd, mmap, sz) != sz) {
pr_debug("%s failed\n", __func__);
return -1;
}
return 0;
}
static int write_sample(struct test_data *td, u64 sample_type, u64 id, pid_t pid, pid_t tid)
{
char buf[PERF_SAMPLE_MAX_SIZE];
union perf_event *event = (union perf_event *)buf;
struct perf_sample sample = {
.ip = td->ip,
.addr = td->addr,
.id = id,
.time = 1234567890,
.cpu = 31,
.pid = pid,
.tid = tid,
.period = 543212345,
.stream_id = 101,
};
int err;
event->header.type = PERF_RECORD_SAMPLE;
event->header.misc = PERF_RECORD_MISC_USER;
event->header.size = perf_event__sample_event_size(&sample, sample_type, 0);
err = perf_event__synthesize_sample(event, sample_type, 0, &sample);
if (err)
return test_result("perf_event__synthesize_sample() failed", TEST_FAIL);
err = process(&td->tool, event, &sample, td->machine);
if (err)
return test_result("Failed to write sample", TEST_FAIL);
return TEST_OK;
}
static void close_fd(int fd)
{
if (fd >= 0)
close(fd);
}
static const char *prog = "int bar(){};int foo(){bar();};int main(){foo();return 0;}";
static int write_prog(char *file_name)
{
int fd = creat(file_name, 0644);
ssize_t n = strlen(prog);
bool err = fd < 0 || writen(fd, prog, n) != n;
close_fd(fd);
return err ? -1 : 0;
}
static int get_dlfilters_path(char *buf, size_t sz)
{
char perf[PATH_MAX];
char path[PATH_MAX];
char *perf_path;
char *exec_path;
perf_exe(perf, sizeof(perf));
perf_path = dirname(perf);
snprintf(path, sizeof(path), "%s/dlfilters/dlfilter-test-api-v0.so", perf_path);
if (access(path, R_OK)) {
exec_path = get_argv_exec_path();
if (!exec_path)
return -1;
snprintf(path, sizeof(path), "%s/dlfilters/dlfilter-test-api-v0.so", exec_path);
free(exec_path);
if (access(path, R_OK))
return -1;
}
strlcpy(buf, dirname(path), sz);
return 0;
}
static int check_filter_desc(struct test_data *td)
{
char *long_desc;
char *desc;
if (get_filter_desc(td->dlfilters, "dlfilter-test-api-v0.so", &desc, &long_desc) &&
long_desc && !strcmp(long_desc, "Filter used by the 'dlfilter C API' perf test") &&
desc && !strcmp(desc, "dlfilter to test v0 C API"))
return 0;
return -1;
}
static int get_ip_addr(struct test_data *td)
{
struct map *map;
struct symbol *sym;
map = dso__new_map(td->prog_file_name);
if (!map)
return -1;
sym = map__find_symbol_by_name(map, "foo");
if (sym)
td->foo = sym->start;
sym = map__find_symbol_by_name(map, "bar");
if (sym)
td->bar = sym->start;
map__put(map);
td->ip = MAP_START + td->foo;
td->addr = MAP_START + td->bar;
return td->foo && td->bar ? 0 : -1;
}
static int do_run_perf_script(struct test_data *td, int do_early)
{
return system_cmd("%s script -i %s "
"--dlfilter %s/dlfilter-test-api-v0.so "
"--dlarg first "
"--dlarg %d "
"--dlarg %" PRIu64 " "
"--dlarg %" PRIu64 " "
"--dlarg %d "
"--dlarg last",
td->perf, td->perf_data_file_name, td->dlfilters,
verbose, td->ip, td->addr, do_early);
}
static int run_perf_script(struct test_data *td)
{
int do_early;
int err;
for (do_early = 0; do_early < 3; do_early++) {
err = do_run_perf_script(td, do_early);
if (err)
return err;
}
return 0;
}
#define TEST_SAMPLE_TYPE (PERF_SAMPLE_IP | PERF_SAMPLE_TID | \
PERF_SAMPLE_IDENTIFIER | PERF_SAMPLE_TIME | \
PERF_SAMPLE_ADDR | PERF_SAMPLE_CPU | \
PERF_SAMPLE_PERIOD | PERF_SAMPLE_STREAM_ID)
static int test__dlfilter_test(struct test_data *td)
{
u64 sample_type = TEST_SAMPLE_TYPE;
pid_t pid = 12345;
pid_t tid = 12346;
u64 id = 99;
int err;
if (get_dlfilters_path(td->dlfilters, PATH_MAX))
return test_result("dlfilters not found", TEST_SKIP);
if (check_filter_desc(td))
return test_result("Failed to get expected filter description", TEST_FAIL);
if (!have_gcc())
return test_result("gcc not found", TEST_SKIP);
pr_debug("dlfilters path: %s\n", td->dlfilters);
if (write_prog(td->c_file_name))
return test_result("Failed to write test C file", TEST_FAIL);
if (verbose > 1)
system_cmd("cat %s ; echo", td->c_file_name);
if (system_cmd("gcc -g -o %s %s", td->prog_file_name, td->c_file_name))
return TEST_FAIL;
if (verbose > 2)
system_cmd("objdump -x -dS %s", td->prog_file_name);
if (get_ip_addr(td))
return test_result("Failed to find program symbols", TEST_FAIL);
pr_debug("Creating new host machine structure\n");
td->machine = machine__new_host();
td->machine->env = &perf_env;
td->fd = creat(td->perf_data_file_name, 0644);
if (td->fd < 0)
return test_result("Failed to create test perf.data file", TEST_FAIL);
err = perf_header__write_pipe(td->fd);
if (err < 0)
return test_result("perf_header__write_pipe() failed", TEST_FAIL);
err = write_attr(td, sample_type, &id);
if (err)
return test_result("perf_event__synthesize_attr() failed", TEST_FAIL);
if (write_comm(td->fd, pid, tid, "test-prog"))
return TEST_FAIL;
if (write_mmap(td->fd, pid, tid, MAP_START, 0x10000, 0, td->prog_file_name))
return TEST_FAIL;
if (write_sample(td, sample_type, id, pid, tid) != TEST_OK)
return TEST_FAIL;
if (verbose > 1)
system_cmd("%s script -i %s -D", td->perf, td->perf_data_file_name);
err = run_perf_script(td);
if (err)
return TEST_FAIL;
return TEST_OK;
}
static void unlink_path(const char *path)
{
if (*path)
unlink(path);
}
static void test_data__free(struct test_data *td)
{
machine__delete(td->machine);
close_fd(td->fd);
if (verbose <= 2) {
unlink_path(td->c_file_name);
unlink_path(td->prog_file_name);
unlink_path(td->perf_data_file_name);
}
}
int test__dlfilter(struct test *test __maybe_unused, int subtest __maybe_unused)
{
struct test_data td = {.fd = -1};
int pid = getpid();
int err;
perf_exe(td.perf, sizeof(td.perf));
snprintf(td.perf_data_file_name, PATH_MAX, "/tmp/dlfilter-test-%u-perf-data", pid);
snprintf(td.c_file_name, PATH_MAX, "/tmp/dlfilter-test-%u-prog.c", pid);
snprintf(td.prog_file_name, PATH_MAX, "/tmp/dlfilter-test-%u-prog", pid);
err = test__dlfilter_test(&td);
test_data__free(&td);
return err;
}

1
tools/perf/tests/tests.h
View File

@ -127,6 +127,7 @@ int test__parse_metric(struct test *test, int subtest);
int test__pe_file_parsing(struct test *test, int subtest);
int test__expand_cgroup_events(struct test *test, int subtest);
int test__perf_time_to_tsc(struct test *test, int subtest);
int test__dlfilter(struct test *test, int subtest);
bool test__bp_signal_is_supported(void);
bool test__bp_account_is_supported(void);

4
tools/perf/util/dlfilter.c
View File

@ -530,8 +530,8 @@ int dlfilter__do_filter_event(struct dlfilter *d,
return ret;
}
static bool get_filter_desc(const char *dirname, const char *name,
char **desc, char **long_desc)
bool get_filter_desc(const char *dirname, const char *name, char **desc,
char **long_desc)
{
char path[PATH_MAX];
void *handle;

2
tools/perf/util/dlfilter.h
View File

@ -93,5 +93,7 @@ static inline int dlfilter__filter_event_early(struct dlfilter *d,
}
int list_available_dlfilters(const struct option *opt, const char *s, int unset);
bool get_filter_desc(const char *dirname, const char *name, char **desc,
char **long_desc);
#endif