perf tests: Add dlfilter test
authorAdrian Hunter <adrian.hunter@intel.com>
Wed, 11 Aug 2021 10:10:36 +0000 (13:10 +0300)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Wed, 11 Aug 2021 12:35:44 +0000 (09:35 -0300)
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>
tools/perf/Makefile.perf
tools/perf/dlfilters/dlfilter-test-api-v0.c [new file with mode: 0644]
tools/perf/tests/Build
tools/perf/tests/builtin-test.c
tools/perf/tests/dlfilter-test.c [new file with mode: 0644]
tools/perf/tests/tests.h
tools/perf/util/dlfilter.c
tools/perf/util/dlfilter.h

index 6dafde6..2462359 100644 (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'
diff --git a/tools/perf/dlfilters/dlfilter-test-api-v0.c b/tools/perf/dlfilters/dlfilter-test-api-v0.c
new file mode 100644 (file)
index 0000000..7565a18
--- /dev/null
@@ -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";
+}
index 650aec1..803ca42 100644 (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)
index 5e62425..fb5846d 100644 (file)
@@ -361,6 +361,10 @@ static struct test generic_tests[] = {
                .is_supported = test__tsc_is_supported,
        },
        {
+               .desc = "dlfilter C API",
+               .func = test__dlfilter,
+       },
+       {
                .func = NULL,
        },
 };
diff --git a/tools/perf/tests/dlfilter-test.c b/tools/perf/tests/dlfilter-test.c
new file mode 100644 (file)
index 0000000..7eba795
--- /dev/null
@@ -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;
+}
index 1100dd5..fe1306f 100644 (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);
index 7d11ce7..db964d5 100644 (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;
index 5059804..cc4bb96 100644 (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