/* For the CLR_() macros */ #include #include "evlist.h" #include "evsel.h" #include "thread_map.h" #include "cpumap.h" #include "tests.h" #include /* * This test will generate random numbers of calls to some getpid syscalls, * then establish an mmap for a group of events that are created to monitor * the syscalls. * * It will receive the events, using mmap, use its PERF_SAMPLE_ID generated * sample.id field to map back to its respective perf_evsel instance. * * Then it checks if the number of syscalls reported as perf events by * the kernel corresponds to the number of syscalls made. */ int test__basic_mmap(int subtest __maybe_unused) { int err = -1; union perf_event *event; struct thread_map *threads; struct cpu_map *cpus; struct perf_evlist *evlist; cpu_set_t cpu_set; const char *syscall_names[] = { "getsid", "getppid", "getpgid", }; pid_t (*syscalls[])(void) = { (void *)getsid, getppid, (void*)getpgid }; #define nsyscalls ARRAY_SIZE(syscall_names) unsigned int nr_events[nsyscalls], expected_nr_events[nsyscalls], i, j; struct perf_evsel *evsels[nsyscalls], *evsel; char sbuf[STRERR_BUFSIZE]; threads = thread_map__new(-1, getpid(), UINT_MAX); if (threads == NULL) { pr_debug("thread_map__new\n"); return -1; } cpus = cpu_map__new(NULL); if (cpus == NULL) { pr_debug("cpu_map__new\n"); goto out_free_threads; } CPU_ZERO(&cpu_set); CPU_SET(cpus->map[0], &cpu_set); sched_setaffinity(0, sizeof(cpu_set), &cpu_set); if (sched_setaffinity(0, sizeof(cpu_set), &cpu_set) < 0) { pr_debug("sched_setaffinity() failed on CPU %d: %s ", cpus->map[0], str_error_r(errno, sbuf, sizeof(sbuf))); goto out_free_cpus; } evlist = perf_evlist__new(); if (evlist == NULL) { pr_debug("perf_evlist__new\n"); goto out_free_cpus; } perf_evlist__set_maps(evlist, cpus, threads); for (i = 0; i < nsyscalls; ++i) { char name[64]; snprintf(name, sizeof(name), "sys_enter_%s", syscall_names[i]); evsels[i] = perf_evsel__newtp("syscalls", name); if (IS_ERR(evsels[i])) { pr_debug("perf_evsel__new\n"); goto out_delete_evlist; } evsels[i]->attr.wakeup_events = 1; perf_evsel__set_sample_id(evsels[i], false); perf_evlist__add(evlist, evsels[i]); if (perf_evsel__open(evsels[i], cpus, threads) < 0) { pr_debug("failed to open counter: %s, " "tweak /proc/sys/kernel/perf_event_paranoid?\n", str_error_r(errno, sbuf, sizeof(sbuf))); goto out_delete_evlist; } nr_events[i] = 0; expected_nr_events[i] = 1 + rand() % 127; } if (perf_evlist__mmap(evlist, 128, true) < 0) { pr_debug("failed to mmap events: %d (%s)\n", errno, str_error_r(errno, sbuf, sizeof(sbuf))); goto out_delete_evlist; } for (i = 0; i < nsyscalls; ++i) for (j = 0; j < expected_nr_events[i]; ++j) { int foo = syscalls[i](); ++foo; } while ((event = perf_evlist__mmap_read(evlist, 0)) != NULL) { struct perf_sample sample; if (event->header.type != PERF_RECORD_SAMPLE) { pr_debug("unexpected %s event\n", perf_event__name(event->header.type)); goto out_delete_evlist; } err = perf_evlist__parse_sample(evlist, event, &sample); if (err) { pr_err("Can't parse sample, err = %d\n", err); goto out_delete_evlist; } err = -1; evsel = perf_evlist__id2evsel(evlist, sample.id); if (evsel == NULL) { pr_debug("event with id %" PRIu64 " doesn't map to an evsel\n", sample.id); goto out_delete_evlist; } nr_events[evsel->idx]++; perf_evlist__mmap_consume(evlist, 0); } err = 0; evlist__for_each_entry(evlist, evsel) { if (nr_events[evsel->idx] != expected_nr_events[evsel->idx]) { pr_debug("expected %d %s events, got %d\n", expected_nr_events[evsel->idx], perf_evsel__name(evsel), nr_events[evsel->idx]); err = -1; goto out_delete_evlist; } } out_delete_evlist: perf_evlist__delete(evlist); cpus = NULL; threads = NULL; out_free_cpus: cpu_map__put(cpus); out_free_threads: thread_map__put(threads); return err; } e6a3613d3f0bb088a3160095c8da4c1214d02'>plain -rwxr-xr-xPERF-VERSION-GEN1010log plain -rw-r--r--alias.c1471log plain -rw-r--r--annotate.c44411log plain -rw-r--r--annotate.h5583log plain -rw-r--r--auxtrace.c47774log plain -rw-r--r--auxtrace.h22142log plain -rw-r--r--block-range.c6948log plain -rw-r--r--block-range.h1607log plain -rw-r--r--bpf-loader.c40787log plain -rw-r--r--bpf-loader.h6215log plain -rw-r--r--bpf-prologue.c11226log plain -rw-r--r--bpf-prologue.h847log plain -rw-r--r--build-id.c19054log plain -rw-r--r--build-id.h1859log plain d---------c++184log plain -rw-r--r--cache.h733log plain -rw-r--r--call-path.c2893log plain -rw-r--r--call-path.h2203log plain -rw-r--r--callchain.c29332log plain -rw-r--r--callchain.h7881log plain -rw-r--r--cgroup.c3195log plain -rw-r--r--cgroup.h359log plain -rw-r--r--cloexec.c1950log plain -rw-r--r--cloexec.h251log plain -rw-r--r--color.c4787log plain -rw-r--r--color.h1647log plain -rw-r--r--comm.c2239log plain -rw-r--r--comm.h561log plain -rw-r--r--config.c16262log plain -rw-r--r--config.h2113log plain -rw-r--r--counts.c1026log plain -rw-r--r--counts.h790log plain -rw-r--r--cpumap.c12627log plain -rw-r--r--cpumap.h1954log plain -rw-r--r--cs-etm.h2061log plain -rw-r--r--ctype.c2018log plain -rw-r--r--data-convert-bt.c36671log plain -rw-r--r--data-convert-bt.h302log plain -rw-r--r--data-convert.h141log plain -rw-r--r--data.c3459log plain -rw-r--r--data.h1369log plain -rw-r--r--db-export.c11434log plain -rw-r--r--db-export.h3816log plain -rw-r--r--debug.c4417log plain -rw-r--r--debug.h2023log plain -rw-r--r--demangle-java.c4219log plain -rw-r--r--demangle-java.h249log plain -rw-r--r--demangle-rust.c6602log plain -rw-r--r--demangle-rust.h170log plain -rw-r--r--drv_configs.c1834log plain -rw-r--r--drv_configs.h844log plain -rw-r--r--dso.c31994log plain -rw-r--r--dso.h10399log plain -rw-r--r--dwarf-aux.c33828log plain -rw-r--r--dwarf-aux.h5101log plain -rw-r--r--dwarf-regs.c1816log plain -rw-r--r--env.c1884log plain -rw-r--r--env.h1268log plain -rw-r--r--event.c36670log plain -rw-r--r--event.h15997log plain -rw-r--r--evlist.c47104log plain -rw-r--r--evlist.h12584log plain -rw-r--r--evsel.c63917log plain -rw-r--r--evsel.h13041log plain -rw-r--r--evsel_fprintf.c5831log plain -rw-r--r--find-vdso-map.c581log plain -rw-r--r--genelf.c11653log plain -rw-r--r--genelf.h1814log plain -rw-r--r--genelf_debug.c14374log plain -rwxr-xr-xgenerate-cmdlist.sh1141log plain -rw-r--r--group.h122log plain -rw-r--r--header.c73410log plain -rw-r--r--header.h4365log plain -rw-r--r--help-unknown-cmd.c3221log plain