diff options
Diffstat (limited to 'src/tools/perf/builtin-record.c')
| -rw-r--r-- | src/tools/perf/builtin-record.c | 1019 |
1 files changed, 0 insertions, 1019 deletions
diff --git a/src/tools/perf/builtin-record.c b/src/tools/perf/builtin-record.c deleted file mode 100644 index d046514..0000000 --- a/src/tools/perf/builtin-record.c +++ /dev/null @@ -1,1019 +0,0 @@ -/* - * builtin-record.c - * - * Builtin record command: Record the profile of a workload - * (or a CPU, or a PID) into the perf.data output file - for - * later analysis via perf report. - */ -#include "builtin.h" - -#include "perf.h" - -#include "util/build-id.h" -#include "util/util.h" -#include "util/parse-options.h" -#include "util/parse-events.h" - -#include "util/header.h" -#include "util/event.h" -#include "util/evlist.h" -#include "util/evsel.h" -#include "util/debug.h" -#include "util/session.h" -#include "util/tool.h" -#include "util/symbol.h" -#include "util/cpumap.h" -#include "util/thread_map.h" - -#include <unistd.h> -#include <sched.h> -#include <sys/mman.h> - -#ifndef HAVE_ON_EXIT -#ifndef ATEXIT_MAX -#define ATEXIT_MAX 32 -#endif -static int __on_exit_count = 0; -typedef void (*on_exit_func_t) (int, void *); -static on_exit_func_t __on_exit_funcs[ATEXIT_MAX]; -static void *__on_exit_args[ATEXIT_MAX]; -static int __exitcode = 0; -static void __handle_on_exit_funcs(void); -static int on_exit(on_exit_func_t function, void *arg); -#define exit(x) (exit)(__exitcode = (x)) - -static int on_exit(on_exit_func_t function, void *arg) -{ - if (__on_exit_count == ATEXIT_MAX) - return -ENOMEM; - else if (__on_exit_count == 0) - atexit(__handle_on_exit_funcs); - __on_exit_funcs[__on_exit_count] = function; - __on_exit_args[__on_exit_count++] = arg; - return 0; -} - -static void __handle_on_exit_funcs(void) -{ - int i; - for (i = 0; i < __on_exit_count; i++) - __on_exit_funcs[i] (__exitcode, __on_exit_args[i]); -} -#endif - -struct perf_record { - struct perf_tool tool; - struct perf_record_opts opts; - u64 bytes_written; - const char *output_name; - struct perf_evlist *evlist; - struct perf_session *session; - const char *progname; - int output; - unsigned int page_size; - int realtime_prio; - bool no_buildid; - bool no_buildid_cache; - long samples; - off_t post_processing_offset; -}; - -static void advance_output(struct perf_record *rec, size_t size) -{ - rec->bytes_written += size; -} - -static int write_output(struct perf_record *rec, void *buf, size_t size) -{ - while (size) { - int ret = write(rec->output, buf, size); - - if (ret < 0) { - pr_err("failed to write\n"); - return -1; - } - - size -= ret; - buf += ret; - - rec->bytes_written += ret; - } - - return 0; -} - -static int process_synthesized_event(struct perf_tool *tool, - union perf_event *event, - struct perf_sample *sample __maybe_unused, - struct machine *machine __maybe_unused) -{ - struct perf_record *rec = container_of(tool, struct perf_record, tool); - if (write_output(rec, event, event->header.size) < 0) - return -1; - - return 0; -} - -static int perf_record__mmap_read(struct perf_record *rec, - struct perf_mmap *md) -{ - unsigned int head = perf_mmap__read_head(md); - unsigned int old = md->prev; - unsigned char *data = md->base + rec->page_size; - unsigned long size; - void *buf; - int rc = 0; - - if (old == head) - return 0; - - rec->samples++; - - size = head - old; - - if ((old & md->mask) + size != (head & md->mask)) { - buf = &data[old & md->mask]; - size = md->mask + 1 - (old & md->mask); - old += size; - - if (write_output(rec, buf, size) < 0) { - rc = -1; - goto out; - } - } - - buf = &data[old & md->mask]; - size = head - old; - old += size; - - if (write_output(rec, buf, size) < 0) { - rc = -1; - goto out; - } - - md->prev = old; - perf_mmap__write_tail(md, old); - -out: - return rc; -} - -static volatile int done = 0; -static volatile int signr = -1; -static volatile int child_finished = 0; - -static void sig_handler(int sig) -{ - if (sig == SIGCHLD) - child_finished = 1; - - done = 1; - signr = sig; -} - -static void perf_record__sig_exit(int exit_status __maybe_unused, void *arg) -{ - struct perf_record *rec = arg; - int status; - - if (rec->evlist->workload.pid > 0) { - if (!child_finished) - kill(rec->evlist->workload.pid, SIGTERM); - - wait(&status); - if (WIFSIGNALED(status)) - psignal(WTERMSIG(status), rec->progname); - } - - if (signr == -1 || signr == SIGUSR1) - return; - - signal(signr, SIG_DFL); -} - -static int perf_record__open(struct perf_record *rec) -{ - char msg[512]; - struct perf_evsel *pos; - struct perf_evlist *evlist = rec->evlist; - struct perf_session *session = rec->session; - struct perf_record_opts *opts = &rec->opts; - int rc = 0; - - perf_evlist__config(evlist, opts); - - list_for_each_entry(pos, &evlist->entries, node) { -try_again: - if (perf_evsel__open(pos, evlist->cpus, evlist->threads) < 0) { - if (perf_evsel__fallback(pos, errno, msg, sizeof(msg))) { - if (verbose) - ui__warning("%s\n", msg); - goto try_again; - } - - rc = -errno; - perf_evsel__open_strerror(pos, &opts->target, - errno, msg, sizeof(msg)); - ui__error("%s\n", msg); - goto out; - } - } - - if (perf_evlist__apply_filters(evlist)) { - error("failed to set filter with %d (%s)\n", errno, - strerror(errno)); - rc = -1; - goto out; - } - - if (perf_evlist__mmap(evlist, opts->mmap_pages, false) < 0) { - if (errno == EPERM) { - pr_err("Permission error mapping pages.\n" - "Consider increasing " - "/proc/sys/kernel/perf_event_mlock_kb,\n" - "or try again with a smaller value of -m/--mmap_pages.\n" - "(current value: %d)\n", opts->mmap_pages); - rc = -errno; - } else if (!is_power_of_2(opts->mmap_pages) && - (opts->mmap_pages != UINT_MAX)) { - pr_err("--mmap_pages/-m value must be a power of two."); - rc = -EINVAL; - } else { - pr_err("failed to mmap with %d (%s)\n", errno, strerror(errno)); - rc = -errno; - } - goto out; - } - - session->evlist = evlist; - perf_session__set_id_hdr_size(session); -out: - return rc; -} - -static int process_buildids(struct perf_record *rec) -{ - u64 size = lseek(rec->output, 0, SEEK_CUR); - - if (size == 0) - return 0; - - rec->session->fd = rec->output; - return __perf_session__process_events(rec->session, rec->post_processing_offset, - size - rec->post_processing_offset, - size, &build_id__mark_dso_hit_ops); -} - -static void perf_record__exit(int status, void *arg) -{ - struct perf_record *rec = arg; - - if (status != 0) - return; - - if (!rec->opts.pipe_output) { - rec->session->header.data_size += rec->bytes_written; - - if (!rec->no_buildid) - process_buildids(rec); - perf_session__write_header(rec->session, rec->evlist, - rec->output, true); - perf_session__delete(rec->session); - perf_evlist__delete(rec->evlist); - symbol__exit(); - } -} - -static void perf_event__synthesize_guest_os(struct machine *machine, void *data) -{ - int err; - struct perf_tool *tool = data; - /* - *As for guest kernel when processing subcommand record&report, - *we arrange module mmap prior to guest kernel mmap and trigger - *a preload dso because default guest module symbols are loaded - *from guest kallsyms instead of /lib/modules/XXX/XXX. This - *method is used to avoid symbol missing when the first addr is - *in module instead of in guest kernel. - */ - err = perf_event__synthesize_modules(tool, process_synthesized_event, - machine); - if (err < 0) - pr_err("Couldn't record guest kernel [%d]'s reference" - " relocation symbol.\n", machine->pid); - - /* - * We use _stext for guest kernel because guest kernel's /proc/kallsyms - * have no _text sometimes. - */ - err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, - machine, "_text"); - if (err < 0) - err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, - machine, "_stext"); - if (err < 0) - pr_err("Couldn't record guest kernel [%d]'s reference" - " relocation symbol.\n", machine->pid); -} - -static struct perf_event_header finished_round_event = { - .size = sizeof(struct perf_event_header), - .type = PERF_RECORD_FINISHED_ROUND, -}; - -static int perf_record__mmap_read_all(struct perf_record *rec) -{ - int i; - int rc = 0; - - for (i = 0; i < rec->evlist->nr_mmaps; i++) { - if (rec->evlist->mmap[i].base) { - if (perf_record__mmap_read(rec, &rec->evlist->mmap[i]) != 0) { - rc = -1; - goto out; - } - } - } - - if (perf_header__has_feat(&rec->session->header, HEADER_TRACING_DATA)) - rc = write_output(rec, &finished_round_event, - sizeof(finished_round_event)); - -out: - return rc; -} - -static int __cmd_record(struct perf_record *rec, int argc, const char **argv) -{ - struct stat st; - int flags; - int err, output, feat; - unsigned long waking = 0; - const bool forks = argc > 0; - struct machine *machine; - struct perf_tool *tool = &rec->tool; - struct perf_record_opts *opts = &rec->opts; - struct perf_evlist *evsel_list = rec->evlist; - const char *output_name = rec->output_name; - struct perf_session *session; - bool disabled = false; - - rec->progname = argv[0]; - - rec->page_size = sysconf(_SC_PAGE_SIZE); - - on_exit(perf_record__sig_exit, rec); - signal(SIGCHLD, sig_handler); - signal(SIGINT, sig_handler); - signal(SIGUSR1, sig_handler); - signal(SIGTERM, sig_handler); - - if (!output_name) { - if (!fstat(STDOUT_FILENO, &st) && S_ISFIFO(st.st_mode)) - opts->pipe_output = true; - else - rec->output_name = output_name = "perf.data"; - } - if (output_name) { - if (!strcmp(output_name, "-")) - opts->pipe_output = true; - else if (!stat(output_name, &st) && st.st_size) { - char oldname[PATH_MAX]; - snprintf(oldname, sizeof(oldname), "%s.old", - output_name); - unlink(oldname); - rename(output_name, oldname); - } - } - - flags = O_CREAT|O_RDWR|O_TRUNC; - - if (opts->pipe_output) - output = STDOUT_FILENO; - else - output = open(output_name, flags, S_IRUSR | S_IWUSR); - if (output < 0) { - perror("failed to create output file"); - return -1; - } - - rec->output = output; - - session = perf_session__new(output_name, O_WRONLY, - true, false, NULL); - if (session == NULL) { - pr_err("Not enough memory for reading perf file header\n"); - return -1; - } - - rec->session = session; - - for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++) - perf_header__set_feat(&session->header, feat); - - if (rec->no_buildid) - perf_header__clear_feat(&session->header, HEADER_BUILD_ID); - - if (!have_tracepoints(&evsel_list->entries)) - perf_header__clear_feat(&session->header, HEADER_TRACING_DATA); - - if (!rec->opts.branch_stack) - perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK); - - if (forks) { - err = perf_evlist__prepare_workload(evsel_list, &opts->target, - argv, opts->pipe_output, - true); - if (err < 0) { - pr_err("Couldn't run the workload!\n"); - goto out_delete_session; - } - } - - if (perf_record__open(rec) != 0) { - err = -1; - goto out_delete_session; - } - - if (!evsel_list->nr_groups) - perf_header__clear_feat(&session->header, HEADER_GROUP_DESC); - - /* - * perf_session__delete(session) will be called at perf_record__exit() - */ - on_exit(perf_record__exit, rec); - - if (opts->pipe_output) { - err = perf_header__write_pipe(output); - if (err < 0) - goto out_delete_session; - } else { - err = perf_session__write_header(session, evsel_list, - output, false); - if (err < 0) - goto out_delete_session; - } - - if (!rec->no_buildid - && !perf_header__has_feat(&session->header, HEADER_BUILD_ID)) { - pr_err("Couldn't generate buildids. " - "Use --no-buildid to profile anyway.\n"); - err = -1; - goto out_delete_session; - } - - rec->post_processing_offset = lseek(output, 0, SEEK_CUR); - - machine = &session->machines.host; - - if (opts->pipe_output) { - err = perf_event__synthesize_attrs(tool, session, - process_synthesized_event); - if (err < 0) { - pr_err("Couldn't synthesize attrs.\n"); - goto out_delete_session; - } - - if (have_tracepoints(&evsel_list->entries)) { - /* - * FIXME err <= 0 here actually means that - * there were no tracepoints so its not really - * an error, just that we don't need to - * synthesize anything. We really have to - * return this more properly and also - * propagate errors that now are calling die() - */ - err = perf_event__synthesize_tracing_data(tool, output, evsel_list, - process_synthesized_event); - if (err <= 0) { - pr_err("Couldn't record tracing data.\n"); - goto out_delete_session; - } - advance_output(rec, err); - } - } - - err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, - machine, "_text"); - if (err < 0) - err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, - machine, "_stext"); - if (err < 0) - pr_err("Couldn't record kernel reference relocation symbol\n" - "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" - "Check /proc/kallsyms permission or run as root.\n"); - - err = perf_event__synthesize_modules(tool, process_synthesized_event, - machine); - if (err < 0) - pr_err("Couldn't record kernel module information.\n" - "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" - "Check /proc/modules permission or run as root.\n"); - - if (perf_guest) { - machines__process_guests(&session->machines, - perf_event__synthesize_guest_os, tool); - } - - if (perf_target__has_task(&opts->target)) - err = perf_event__synthesize_thread_map(tool, evsel_list->threads, - process_synthesized_event, - machine); - else if (perf_target__has_cpu(&opts->target)) - err = perf_event__synthesize_threads(tool, process_synthesized_event, - machine); - else /* command specified */ - err = 0; - - if (err != 0) - goto out_delete_session; - - if (rec->realtime_prio) { - struct sched_param param; - - param.sched_priority = rec->realtime_prio; - if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { - pr_err("Could not set realtime priority.\n"); - err = -1; - goto out_delete_session; - } - } - - /* - * When perf is starting the traced process, all the events - * (apart from group members) have enable_on_exec=1 set, - * so don't spoil it by prematurely enabling them. - */ - if (!perf_target__none(&opts->target)) - perf_evlist__enable(evsel_list); - - /* - * Let the child rip - */ - if (forks) - perf_evlist__start_workload(evsel_list); - - for (;;) { - int hits = rec->samples; - - if (perf_record__mmap_read_all(rec) < 0) { - err = -1; - goto out_delete_session; - } - - if (hits == rec->samples) { - if (done) - break; - err = poll(evsel_list->pollfd, evsel_list->nr_fds, -1); - waking++; - } - - /* - * When perf is starting the traced process, at the end events - * die with the process and we wait for that. Thus no need to - * disable events in this case. - */ - if (done && !disabled && !perf_target__none(&opts->target)) { - perf_evlist__disable(evsel_list); - disabled = true; - } - } - - if (quiet || signr == SIGUSR1) - return 0; - - fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking); - - /* - * Approximate RIP event size: 24 bytes. - */ - fprintf(stderr, - "[ perf record: Captured and wrote %.3f MB %s (~%" PRIu64 " samples) ]\n", - (double)rec->bytes_written / 1024.0 / 1024.0, - output_name, - rec->bytes_written / 24); - - return 0; - -out_delete_session: - perf_session__delete(session); - return err; -} - -#define BRANCH_OPT(n, m) \ - { .name = n, .mode = (m) } - -#define BRANCH_END { .name = NULL } - -struct branch_mode { - const char *name; - int mode; -}; - -static const struct branch_mode branch_modes[] = { - BRANCH_OPT("u", PERF_SAMPLE_BRANCH_USER), - BRANCH_OPT("k", PERF_SAMPLE_BRANCH_KERNEL), - BRANCH_OPT("hv", PERF_SAMPLE_BRANCH_HV), - BRANCH_OPT("any", PERF_SAMPLE_BRANCH_ANY), - BRANCH_OPT("any_call", PERF_SAMPLE_BRANCH_ANY_CALL), - BRANCH_OPT("any_ret", PERF_SAMPLE_BRANCH_ANY_RETURN), - BRANCH_OPT("ind_call", PERF_SAMPLE_BRANCH_IND_CALL), - BRANCH_END -}; - -static int -parse_branch_stack(const struct option *opt, const char *str, int unset) -{ -#define ONLY_PLM \ - (PERF_SAMPLE_BRANCH_USER |\ - PERF_SAMPLE_BRANCH_KERNEL |\ - PERF_SAMPLE_BRANCH_HV) - - uint64_t *mode = (uint64_t *)opt->value; - const struct branch_mode *br; - char *s, *os = NULL, *p; - int ret = -1; - - if (unset) - return 0; - - /* - * cannot set it twice, -b + --branch-filter for instance - */ - if (*mode) - return -1; - - /* str may be NULL in case no arg is passed to -b */ - if (str) { - /* because str is read-only */ - s = os = strdup(str); - if (!s) - return -1; - - for (;;) { - p = strchr(s, ','); - if (p) - *p = '\0'; - - for (br = branch_modes; br->name; br++) { - if (!strcasecmp(s, br->name)) - break; - } - if (!br->name) { - ui__warning("unknown branch filter %s," - " check man page\n", s); - goto error; - } - - *mode |= br->mode; - - if (!p) - break; - - s = p + 1; - } - } - ret = 0; - - /* default to any branch */ - if ((*mode & ~ONLY_PLM) == 0) { - *mode = PERF_SAMPLE_BRANCH_ANY; - } -error: - free(os); - return ret; -} - -#ifdef LIBUNWIND_SUPPORT -static int get_stack_size(char *str, unsigned long *_size) -{ - char *endptr; - unsigned long size; - unsigned long max_size = round_down(USHRT_MAX, sizeof(u64)); - - size = strtoul(str, &endptr, 0); - - do { - if (*endptr) - break; - - size = round_up(size, sizeof(u64)); - if (!size || size > max_size) - break; - - *_size = size; - return 0; - - } while (0); - - pr_err("callchain: Incorrect stack dump size (max %ld): %s\n", - max_size, str); - return -1; -} -#endif /* LIBUNWIND_SUPPORT */ - -int record_parse_callchain(const char *arg, struct perf_record_opts *opts) -{ - char *tok, *name, *saveptr = NULL; - char *buf; - int ret = -1; - - /* We need buffer that we know we can write to. */ - buf = malloc(strlen(arg) + 1); - if (!buf) - return -ENOMEM; - - strcpy(buf, arg); - - tok = strtok_r((char *)buf, ",", &saveptr); - name = tok ? : (char *)buf; - - do { - /* Framepointer style */ - if (!strncmp(name, "fp", sizeof("fp"))) { - if (!strtok_r(NULL, ",", &saveptr)) { - opts->call_graph = CALLCHAIN_FP; - ret = 0; - } else - pr_err("callchain: No more arguments " - "needed for -g fp\n"); - break; - -#ifdef LIBUNWIND_SUPPORT - /* Dwarf style */ - } else if (!strncmp(name, "dwarf", sizeof("dwarf"))) { - const unsigned long default_stack_dump_size = 8192; - - ret = 0; - opts->call_graph = CALLCHAIN_DWARF; - opts->stack_dump_size = default_stack_dump_size; - - tok = strtok_r(NULL, ",", &saveptr); - if (tok) { - unsigned long size = 0; - - ret = get_stack_size(tok, &size); - opts->stack_dump_size = size; - } -#endif /* LIBUNWIND_SUPPORT */ - } else { - pr_err("callchain: Unknown --call-graph option " - "value: %s\n", arg); - break; - } - - } while (0); - - free(buf); - return ret; -} - -static void callchain_debug(struct perf_record_opts *opts) -{ - pr_debug("callchain: type %d\n", opts->call_graph); - - if (opts->call_graph == CALLCHAIN_DWARF) - pr_debug("callchain: stack dump size %d\n", - opts->stack_dump_size); -} - -int record_parse_callchain_opt(const struct option *opt, - const char *arg, - int unset) -{ - struct perf_record_opts *opts = opt->value; - int ret; - - /* --no-call-graph */ - if (unset) { - opts->call_graph = CALLCHAIN_NONE; - pr_debug("callchain: disabled\n"); - return 0; - } - - ret = record_parse_callchain(arg, opts); - if (!ret) - callchain_debug(opts); - - return ret; -} - -int record_callchain_opt(const struct option *opt, - const char *arg __maybe_unused, - int unset __maybe_unused) -{ - struct perf_record_opts *opts = opt->value; - - if (opts->call_graph == CALLCHAIN_NONE) - opts->call_graph = CALLCHAIN_FP; - - callchain_debug(opts); - return 0; -} - -static const char * const record_usage[] = { - "perf record [<options>] [<command>]", - "perf record [<options>] -- <command> [<options>]", - NULL -}; - -/* - * XXX Ideally would be local to cmd_record() and passed to a perf_record__new - * because we need to have access to it in perf_record__exit, that is called - * after cmd_record() exits, but since record_options need to be accessible to - * builtin-script, leave it here. - * - * At least we don't ouch it in all the other functions here directly. - * - * Just say no to tons of global variables, sigh. - */ -static struct perf_record record = { - .opts = { - .mmap_pages = UINT_MAX, - .user_freq = UINT_MAX, - .user_interval = ULLONG_MAX, - .freq = 4000, - .target = { - .uses_mmap = true, - }, - }, -}; - -#define CALLCHAIN_HELP "setup and enables call-graph (stack chain/backtrace) recording: " - -#ifdef LIBUNWIND_SUPPORT -const char record_callchain_help[] = CALLCHAIN_HELP "fp dwarf"; -#else -const char record_callchain_help[] = CALLCHAIN_HELP "fp"; -#endif - -/* - * XXX Will stay a global variable till we fix builtin-script.c to stop messing - * with it and switch to use the library functions in perf_evlist that came - * from builtin-record.c, i.e. use perf_record_opts, - * perf_evlist__prepare_workload, etc instead of fork+exec'in 'perf record', - * using pipes, etc. - */ -const struct option record_options[] = { - OPT_CALLBACK('e', "event", &record.evlist, "event", - "event selector. use 'perf list' to list available events", - parse_events_option), - OPT_CALLBACK(0, "filter", &record.evlist, "filter", - "event filter", parse_filter), - OPT_STRING('p', "pid", &record.opts.target.pid, "pid", - "record events on existing process id"), - OPT_STRING('t', "tid", &record.opts.target.tid, "tid", - "record events on existing thread id"), - OPT_INTEGER('r', "realtime", &record.realtime_prio, - "collect data with this RT SCHED_FIFO priority"), - OPT_BOOLEAN('D', "no-delay", &record.opts.no_delay, - "collect data without buffering"), - OPT_BOOLEAN('R', "raw-samples", &record.opts.raw_samples, - "collect raw sample records from all opened counters"), - OPT_BOOLEAN('a', "all-cpus", &record.opts.target.system_wide, - "system-wide collection from all CPUs"), - OPT_STRING('C', "cpu", &record.opts.target.cpu_list, "cpu", - "list of cpus to monitor"), - OPT_U64('c', "count", &record.opts.user_interval, "event period to sample"), - OPT_STRING('o', "output", &record.output_name, "file", - "output file name"), - OPT_BOOLEAN('i', "no-inherit", &record.opts.no_inherit, - "child tasks do not inherit counters"), - OPT_UINTEGER('F', "freq", &record.opts.user_freq, "profile at this frequency"), - OPT_UINTEGER('m', "mmap-pages", &record.opts.mmap_pages, - "number of mmap data pages"), - OPT_BOOLEAN(0, "group", &record.opts.group, - "put the counters into a counter group"), - OPT_CALLBACK_NOOPT('g', NULL, &record.opts, - NULL, "enables call-graph recording" , - &record_callchain_opt), - OPT_CALLBACK(0, "call-graph", &record.opts, - "mode[,dump_size]", record_callchain_help, - &record_parse_callchain_opt), - OPT_INCR('v', "verbose", &verbose, - "be more verbose (show counter open errors, etc)"), - OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"), - OPT_BOOLEAN('s', "stat", &record.opts.inherit_stat, - "per thread counts"), - OPT_BOOLEAN('d', "data", &record.opts.sample_address, - "Sample addresses"), - OPT_BOOLEAN('T', "timestamp", &record.opts.sample_time, "Sample timestamps"), - OPT_BOOLEAN('P', "period", &record.opts.period, "Sample period"), - OPT_BOOLEAN('n', "no-samples", &record.opts.no_samples, - "don't sample"), - OPT_BOOLEAN('N', "no-buildid-cache", &record.no_buildid_cache, - "do not update the buildid cache"), - OPT_BOOLEAN('B', "no-buildid", &record.no_buildid, - "do not collect buildids in perf.data"), - OPT_CALLBACK('G', "cgroup", &record.evlist, "name", - "monitor event in cgroup name only", - parse_cgroups), - OPT_STRING('u', "uid", &record.opts.target.uid_str, "user", - "user to profile"), - - OPT_CALLBACK_NOOPT('b', "branch-any", &record.opts.branch_stack, - "branch any", "sample any taken branches", - parse_branch_stack), - - OPT_CALLBACK('j', "branch-filter", &record.opts.branch_stack, - "branch filter mask", "branch stack filter modes", - parse_branch_stack), - OPT_BOOLEAN('W', "weight", &record.opts.sample_weight, - "sample by weight (on special events only)"), - OPT_END() -}; - -int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused) -{ - int err = -ENOMEM; - struct perf_evlist *evsel_list; - struct perf_record *rec = &record; - char errbuf[BUFSIZ]; - - evsel_list = perf_evlist__new(); - if (evsel_list == NULL) - return -ENOMEM; - - rec->evlist = evsel_list; - - argc = parse_options(argc, argv, record_options, record_usage, - PARSE_OPT_STOP_AT_NON_OPTION); - if (!argc && perf_target__none(&rec->opts.target)) - usage_with_options(record_usage, record_options); - - if (nr_cgroups && !rec->opts.target.system_wide) { - ui__error("cgroup monitoring only available in" - " system-wide mode\n"); - usage_with_options(record_usage, record_options); - } - - symbol__init(); - - if (symbol_conf.kptr_restrict) - pr_warning( -"WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,\n" -"check /proc/sys/kernel/kptr_restrict.\n\n" -"Samples in kernel functions may not be resolved if a suitable vmlinux\n" -"file is not found in the buildid cache or in the vmlinux path.\n\n" -"Samples in kernel modules won't be resolved at all.\n\n" -"If some relocation was applied (e.g. kexec) symbols may be misresolved\n" -"even with a suitable vmlinux or kallsyms file.\n\n"); - - if (rec->no_buildid_cache || rec->no_buildid) - disable_buildid_cache(); - - if (evsel_list->nr_entries == 0 && - perf_evlist__add_default(evsel_list) < 0) { - pr_err("Not enough memory for event selector list\n"); - goto out_symbol_exit; - } - - err = perf_target__validate(&rec->opts.target); - if (err) { - perf_target__strerror(&rec->opts.target, err, errbuf, BUFSIZ); - ui__warning("%s", errbuf); - } - - err = perf_target__parse_uid(&rec->opts.target); - if (err) { - int saved_errno = errno; - - perf_target__strerror(&rec->opts.target, err, errbuf, BUFSIZ); - ui__error("%s", errbuf); - - err = -saved_errno; - goto out_symbol_exit; - } - - err = -ENOMEM; - if (perf_evlist__create_maps(evsel_list, &rec->opts.target) < 0) - usage_with_options(record_usage, record_options); - - if (rec->opts.user_interval != ULLONG_MAX) - rec->opts.default_interval = rec->opts.user_interval; - if (rec->opts.user_freq != UINT_MAX) - rec->opts.freq = rec->opts.user_freq; - - /* - * User specified count overrides default frequency. - */ - if (rec->opts.default_interval) - rec->opts.freq = 0; - else if (rec->opts.freq) { - rec->opts.default_interval = rec->opts.freq; - } else { - ui__error("frequency and count are zero, aborting\n"); - err = -EINVAL; - goto out_free_fd; - } - - err = __cmd_record(&record, argc, argv); - - perf_evlist__munmap(evsel_list); - perf_evlist__close(evsel_list); -out_free_fd: - perf_evlist__delete_maps(evsel_list); -out_symbol_exit: - symbol__exit(); - return err; -} |