1b2441318SGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0 2d944c4eeSBorislav Petkov #include <linux/types.h> 3f2a39fe8SArnaldo Carvalho de Melo #include <limits.h> 4395c3070SAdrian Hunter #include <unistd.h> 5395c3070SAdrian Hunter #include <sys/prctl.h> 69c3516d1SJiri Olsa #include <perf/cpumap.h> 7453fa030SJiri Olsa #include <perf/evlist.h> 8395c3070SAdrian Hunter 9b4209025SArnaldo Carvalho de Melo #include "debug.h" 10395c3070SAdrian Hunter #include "parse-events.h" 11395c3070SAdrian Hunter #include "evlist.h" 12395c3070SAdrian Hunter #include "evsel.h" 13aeb00b1aSArnaldo Carvalho de Melo #include "record.h" 14395c3070SAdrian Hunter #include "thread_map.h" 15395c3070SAdrian Hunter #include "tests.h" 16e0fcfb08SArnaldo Carvalho de Melo #include "util/mmap.h" 17395c3070SAdrian Hunter 18395c3070SAdrian Hunter #define CHECK__(x) { \ 19395c3070SAdrian Hunter while ((x) < 0) { \ 20395c3070SAdrian Hunter pr_debug(#x " failed!\n"); \ 21395c3070SAdrian Hunter goto out_err; \ 22395c3070SAdrian Hunter } \ 23395c3070SAdrian Hunter } 24395c3070SAdrian Hunter 25395c3070SAdrian Hunter #define CHECK_NOT_NULL__(x) { \ 26395c3070SAdrian Hunter while ((x) == NULL) { \ 27395c3070SAdrian Hunter pr_debug(#x " failed!\n"); \ 28395c3070SAdrian Hunter goto out_err; \ 29395c3070SAdrian Hunter } \ 30395c3070SAdrian Hunter } 31395c3070SAdrian Hunter 3263503dbaSJiri Olsa static int find_comm(struct evlist *evlist, const char *comm) 33395c3070SAdrian Hunter { 34395c3070SAdrian Hunter union perf_event *event; 35a5830532SJiri Olsa struct mmap *md; 36395c3070SAdrian Hunter int i, found; 37395c3070SAdrian Hunter 38395c3070SAdrian Hunter found = 0; 39c976ee11SJiri Olsa for (i = 0; i < evlist->core.nr_mmaps; i++) { 40693d32aeSKan Liang md = &evlist->mmap[i]; 41b9bae2c8SKan Liang if (perf_mmap__read_init(md) < 0) 42693d32aeSKan Liang continue; 430019dc87SKan Liang while ((event = perf_mmap__read_event(md)) != NULL) { 44395c3070SAdrian Hunter if (event->header.type == PERF_RECORD_COMM && 45395c3070SAdrian Hunter (pid_t)event->comm.pid == getpid() && 46395c3070SAdrian Hunter (pid_t)event->comm.tid == getpid() && 47395c3070SAdrian Hunter strcmp(event->comm.comm, comm) == 0) 48395c3070SAdrian Hunter found += 1; 49d6ace3dfSKan Liang perf_mmap__consume(md); 50395c3070SAdrian Hunter } 51693d32aeSKan Liang perf_mmap__read_done(md); 52395c3070SAdrian Hunter } 53395c3070SAdrian Hunter return found; 54395c3070SAdrian Hunter } 55395c3070SAdrian Hunter 56395c3070SAdrian Hunter /** 57395c3070SAdrian Hunter * test__keep_tracking - test using a dummy software event to keep tracking. 58395c3070SAdrian Hunter * 59395c3070SAdrian Hunter * This function implements a test that checks that tracking events continue 60395c3070SAdrian Hunter * when an event is disabled but a dummy software event is not disabled. If the 61395c3070SAdrian Hunter * test passes %0 is returned, otherwise %-1 is returned. 62395c3070SAdrian Hunter */ 6381f17c90SArnaldo Carvalho de Melo int test__keep_tracking(struct test *test __maybe_unused, int subtest __maybe_unused) 64395c3070SAdrian Hunter { 65b4006796SArnaldo Carvalho de Melo struct record_opts opts = { 66395c3070SAdrian Hunter .mmap_pages = UINT_MAX, 67395c3070SAdrian Hunter .user_freq = UINT_MAX, 68395c3070SAdrian Hunter .user_interval = ULLONG_MAX, 69395c3070SAdrian Hunter .target = { 70395c3070SAdrian Hunter .uses_mmap = true, 71395c3070SAdrian Hunter }, 72395c3070SAdrian Hunter }; 739749b90eSJiri Olsa struct perf_thread_map *threads = NULL; 74f854839bSJiri Olsa struct perf_cpu_map *cpus = NULL; 7563503dbaSJiri Olsa struct evlist *evlist = NULL; 7632dcd021SJiri Olsa struct evsel *evsel = NULL; 77395c3070SAdrian Hunter int found, err = -1; 78395c3070SAdrian Hunter const char *comm; 79395c3070SAdrian Hunter 80395c3070SAdrian Hunter threads = thread_map__new(-1, getpid(), UINT_MAX); 81395c3070SAdrian Hunter CHECK_NOT_NULL__(threads); 82395c3070SAdrian Hunter 839c3516d1SJiri Olsa cpus = perf_cpu_map__new(NULL); 84395c3070SAdrian Hunter CHECK_NOT_NULL__(cpus); 85395c3070SAdrian Hunter 860f98b11cSJiri Olsa evlist = evlist__new(); 87395c3070SAdrian Hunter CHECK_NOT_NULL__(evlist); 88395c3070SAdrian Hunter 89453fa030SJiri Olsa perf_evlist__set_maps(&evlist->core, cpus, threads); 90395c3070SAdrian Hunter 91b39b8393SJiri Olsa CHECK__(parse_events(evlist, "dummy:u", NULL)); 92b39b8393SJiri Olsa CHECK__(parse_events(evlist, "cycles:u", NULL)); 93395c3070SAdrian Hunter 94e68ae9cfSArnaldo Carvalho de Melo perf_evlist__config(evlist, &opts, NULL); 95395c3070SAdrian Hunter 96395c3070SAdrian Hunter evsel = perf_evlist__first(evlist); 97395c3070SAdrian Hunter 981fc632ceSJiri Olsa evsel->core.attr.comm = 1; 991fc632ceSJiri Olsa evsel->core.attr.disabled = 1; 1001fc632ceSJiri Olsa evsel->core.attr.enable_on_exec = 0; 101395c3070SAdrian Hunter 102474ddc4cSJiri Olsa if (evlist__open(evlist) < 0) { 103597bdeb4SWang Nan pr_debug("Unable to open dummy and cycles event\n"); 104597bdeb4SWang Nan err = TEST_SKIP; 105395c3070SAdrian Hunter goto out_err; 106395c3070SAdrian Hunter } 107395c3070SAdrian Hunter 1089521b5f2SJiri Olsa CHECK__(evlist__mmap(evlist, UINT_MAX)); 109395c3070SAdrian Hunter 110395c3070SAdrian Hunter /* 111395c3070SAdrian Hunter * First, test that a 'comm' event can be found when the event is 112395c3070SAdrian Hunter * enabled. 113395c3070SAdrian Hunter */ 114395c3070SAdrian Hunter 1151c87f165SJiri Olsa evlist__enable(evlist); 116395c3070SAdrian Hunter 117395c3070SAdrian Hunter comm = "Test COMM 1"; 118395c3070SAdrian Hunter CHECK__(prctl(PR_SET_NAME, (unsigned long)comm, 0, 0, 0)); 119395c3070SAdrian Hunter 120e74676deSJiri Olsa evlist__disable(evlist); 121395c3070SAdrian Hunter 122395c3070SAdrian Hunter found = find_comm(evlist, comm); 123395c3070SAdrian Hunter if (found != 1) { 124395c3070SAdrian Hunter pr_debug("First time, failed to find tracking event.\n"); 125395c3070SAdrian Hunter goto out_err; 126395c3070SAdrian Hunter } 127395c3070SAdrian Hunter 128395c3070SAdrian Hunter /* 129395c3070SAdrian Hunter * Secondly, test that a 'comm' event can be found when the event is 130395c3070SAdrian Hunter * disabled with the dummy event still enabled. 131395c3070SAdrian Hunter */ 132395c3070SAdrian Hunter 1331c87f165SJiri Olsa evlist__enable(evlist); 134395c3070SAdrian Hunter 135395c3070SAdrian Hunter evsel = perf_evlist__last(evlist); 136395c3070SAdrian Hunter 1379a10bb22SJiri Olsa CHECK__(evsel__disable(evsel)); 138395c3070SAdrian Hunter 139395c3070SAdrian Hunter comm = "Test COMM 2"; 140395c3070SAdrian Hunter CHECK__(prctl(PR_SET_NAME, (unsigned long)comm, 0, 0, 0)); 141395c3070SAdrian Hunter 142e74676deSJiri Olsa evlist__disable(evlist); 143395c3070SAdrian Hunter 144395c3070SAdrian Hunter found = find_comm(evlist, comm); 145395c3070SAdrian Hunter if (found != 1) { 14687ffb6c6SArnaldo Carvalho de Melo pr_debug("Second time, failed to find tracking event.\n"); 147395c3070SAdrian Hunter goto out_err; 148395c3070SAdrian Hunter } 149395c3070SAdrian Hunter 150395c3070SAdrian Hunter err = 0; 151395c3070SAdrian Hunter 152395c3070SAdrian Hunter out_err: 153395c3070SAdrian Hunter if (evlist) { 154e74676deSJiri Olsa evlist__disable(evlist); 155c12995a5SJiri Olsa evlist__delete(evlist); 15603ad9747SArnaldo Carvalho de Melo } else { 15738f01d8dSJiri Olsa perf_cpu_map__put(cpus); 1587836e52eSJiri Olsa perf_thread_map__put(threads); 15903ad9747SArnaldo Carvalho de Melo } 160395c3070SAdrian Hunter 161395c3070SAdrian Hunter return err; 162395c3070SAdrian Hunter } 163