diff options
Diffstat (limited to 'tools/perf/builtin-probe.c')
| -rw-r--r-- | tools/perf/builtin-probe.c | 181 |
1 files changed, 107 insertions, 74 deletions
diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c index 6b1507566770..019fef8da6a8 100644 --- a/tools/perf/builtin-probe.c +++ b/tools/perf/builtin-probe.c @@ -21,6 +21,7 @@ #include "util/build-id.h" #include "util/strlist.h" #include "util/strfilter.h" +#include "util/symbol.h" #include "util/symbol_conf.h" #include "util/debug.h" #include <subcmd/parse-options.h> @@ -31,7 +32,7 @@ #include <linux/zalloc.h> #define DEFAULT_VAR_FILTER "!__k???tab_* & !__crc_*" -#define DEFAULT_FUNC_FILTER "!_*" +#define DEFAULT_FUNC_FILTER "!_* & !*@plt" #define DEFAULT_LIST_FILTER "*" /* Session management structure */ @@ -39,7 +40,6 @@ static struct { int command; /* Command short_name */ bool list_events; bool uprobes; - bool quiet; bool target_used; int nevents; struct perf_probe_event events[MAX_PROBES]; @@ -47,29 +47,29 @@ static struct { char *target; struct strfilter *filter; struct nsinfo *nsi; -} params; +} *params; /* Parse an event definition. Note that any error must die. */ static int parse_probe_event(const char *str) { - struct perf_probe_event *pev = ¶ms.events[params.nevents]; + struct perf_probe_event *pev = ¶ms->events[params->nevents]; int ret; - pr_debug("probe-definition(%d): %s\n", params.nevents, str); - if (++params.nevents == MAX_PROBES) { + pr_debug("probe-definition(%d): %s\n", params->nevents, str); + if (++params->nevents == MAX_PROBES) { pr_err("Too many probes (> %d) were specified.", MAX_PROBES); return -1; } - pev->uprobes = params.uprobes; - if (params.target) { - pev->target = strdup(params.target); + pev->uprobes = params->uprobes; + if (params->target) { + pev->target = strdup(params->target); if (!pev->target) return -ENOMEM; - params.target_used = true; + params->target_used = true; } - pev->nsi = nsinfo__get(params.nsi); + pev->nsi = nsinfo__get(params->nsi); /* Parse a perf-probe command into event */ ret = parse_perf_probe_command(str, pev); @@ -84,12 +84,12 @@ static int params_add_filter(const char *str) int ret = 0; pr_debug2("Add filter: %s\n", str); - if (!params.filter) { - params.filter = strfilter__new(str, &err); - if (!params.filter) + if (!params->filter) { + params->filter = strfilter__new(str, &err); + if (!params->filter) ret = err ? -EINVAL : -ENOMEM; } else - ret = strfilter__or(params.filter, str, &err); + ret = strfilter__or(params->filter, str, &err); if (ret == -EINVAL) { pr_err("Filter parse error at %td.\n", err - str + 1); @@ -112,17 +112,17 @@ static int set_target(const char *ptr) * TODO: Support relative path, and $PATH, $LD_LIBRARY_PATH, * short module name. */ - if (!params.target && ptr && *ptr == '/') { - params.target = strdup(ptr); - if (!params.target) + if (!params->target && ptr && *ptr == '/') { + params->target = strdup(ptr); + if (!params->target) return -ENOMEM; - params.target_used = false; + params->target_used = false; found = 1; buf = ptr + (strlen(ptr) - 3); if (strcmp(buf, ".ko")) - params.uprobes = true; + params->uprobes = true; } @@ -172,15 +172,15 @@ static int opt_set_target(const struct option *opt, const char *str, if (str) { if (!strcmp(opt->long_name, "exec")) - params.uprobes = true; + params->uprobes = true; else if (!strcmp(opt->long_name, "module")) - params.uprobes = false; + params->uprobes = false; else return ret; /* Expand given path to absolute path, except for modulename */ - if (params.uprobes || strchr(str, '/')) { - tmp = nsinfo__realpath(str, params.nsi); + if (params->uprobes || strchr(str, '/')) { + tmp = nsinfo__realpath(str, params->nsi); if (!tmp) { pr_warning("Failed to get the absolute path of %s: %m\n", str); return ret; @@ -190,9 +190,9 @@ static int opt_set_target(const struct option *opt, const char *str, if (!tmp) return -ENOMEM; } - free(params.target); - params.target = tmp; - params.target_used = false; + free(params->target); + params->target = tmp; + params->target_used = false; ret = 0; } @@ -216,8 +216,8 @@ static int opt_set_target_ns(const struct option *opt __maybe_unused, return ret; } nsip = nsinfo__new(ns_pid); - if (nsip && nsip->need_setns) - params.nsi = nsinfo__get(nsip); + if (nsip && nsinfo__need_setns(nsip)) + params->nsi = nsinfo__get(nsip); nsinfo__put(nsip); ret = 0; @@ -238,14 +238,14 @@ static int opt_show_lines(const struct option *opt, if (!str) return 0; - if (params.command == 'L') { + if (params->command == 'L') { pr_warning("Warning: more than one --line options are" " detected. Only the first one is valid.\n"); return 0; } - params.command = opt->short_name; - ret = parse_line_range_desc(str, ¶ms.line_range); + params->command = opt->short_name; + ret = parse_line_range_desc(str, ¶ms->line_range); return ret; } @@ -253,7 +253,7 @@ static int opt_show_lines(const struct option *opt, static int opt_show_vars(const struct option *opt, const char *str, int unset __maybe_unused) { - struct perf_probe_event *pev = ¶ms.events[params.nevents]; + struct perf_probe_event *pev = ¶ms->events[params->nevents]; int ret; if (!str) @@ -264,7 +264,7 @@ static int opt_show_vars(const struct option *opt, pr_err(" Error: '--vars' doesn't accept arguments.\n"); return -EINVAL; } - params.command = opt->short_name; + params->command = opt->short_name; return ret; } @@ -276,7 +276,7 @@ static int opt_add_probe_event(const struct option *opt, const char *str, int unset __maybe_unused) { if (str) { - params.command = opt->short_name; + params->command = opt->short_name; return parse_probe_event(str); } @@ -287,7 +287,7 @@ static int opt_set_filter_with_command(const struct option *opt, const char *str, int unset) { if (!unset) - params.command = opt->short_name; + params->command = opt->short_name; if (str) return params_add_filter(str); @@ -306,20 +306,29 @@ static int opt_set_filter(const struct option *opt __maybe_unused, static int init_params(void) { - return line_range__init(¶ms.line_range); + int ret; + + params = calloc(1, sizeof(*params)); + if (!params) + return -ENOMEM; + + ret = line_range__init(¶ms->line_range); + if (ret) + zfree(¶ms); + return ret; } static void cleanup_params(void) { int i; - for (i = 0; i < params.nevents; i++) - clear_perf_probe_event(params.events + i); - line_range__clear(¶ms.line_range); - free(params.target); - strfilter__delete(params.filter); - nsinfo__put(params.nsi); - memset(¶ms, 0, sizeof(params)); + for (i = 0; i < params->nevents; i++) + clear_perf_probe_event(params->events + i); + line_range__clear(¶ms->line_range); + free(params->target); + strfilter__delete(params->filter); + nsinfo__put(params->nsi); + zfree(¶ms); } static void pr_err_with_code(const char *msg, int err) @@ -346,8 +355,11 @@ static int perf_add_probe_events(struct perf_probe_event *pevs, int npevs) if (ret < 0) goto out_cleanup; - if (params.command == 'D') { /* it shows definition */ - ret = show_probe_trace_events(pevs, npevs); + if (params->command == 'D') { /* it shows definition */ + if (probe_conf.bootconfig) + ret = show_bootconfig_events(pevs, npevs); + else + ret = show_probe_trace_events(pevs, npevs); goto out_cleanup; } @@ -380,9 +392,18 @@ static int perf_add_probe_events(struct perf_probe_event *pevs, int npevs) /* Note that it is possible to skip all events because of blacklist */ if (event) { +#ifndef HAVE_LIBTRACEEVENT + pr_info("\nperf is not linked with libtraceevent, to use the new probe you can use tracefs:\n\n"); + pr_info("\tcd /sys/kernel/tracing/\n"); + pr_info("\techo 1 > events/%s/%s/enable\n", group, event); + pr_info("\techo 1 > tracing_on\n"); + pr_info("\tcat trace_pipe\n"); + pr_info("\tBefore removing the probe, echo 0 > events/%s/%s/enable\n", group, event); +#else /* Show how to use the event. */ pr_info("\nYou can now use it in all perf tools, such as:\n\n"); pr_info("\tperf record -e %s:%s -aR sleep 1\n\n", group, event); +#endif } out_cleanup: @@ -510,8 +531,8 @@ __cmd_probe(int argc, const char **argv) struct option options[] = { OPT_INCR('v', "verbose", &verbose, "be more verbose (show parsed arguments, etc)"), - OPT_BOOLEAN('q', "quiet", ¶ms.quiet, - "be quiet (do not show any messages)"), + OPT_BOOLEAN('q', "quiet", &quiet, + "be quiet (do not show any warnings or messages)"), OPT_CALLBACK_DEFAULT('l', "list", NULL, "[GROUP:]EVENT", "list up probe events", opt_set_filter_with_command, DEFAULT_LIST_FILTER), @@ -581,6 +602,8 @@ __cmd_probe(int argc, const char **argv) "Look for files with symbols relative to this directory"), OPT_CALLBACK(0, "target-ns", NULL, "pid", "target pid for namespace contexts", opt_set_target_ns), + OPT_BOOLEAN(0, "bootconfig", &probe_conf.bootconfig, + "Output probe definition with bootconfig format"), OPT_END() }; int ret; @@ -607,12 +630,21 @@ __cmd_probe(int argc, const char **argv) argc = parse_options(argc, argv, options, probe_usage, PARSE_OPT_STOP_AT_NON_OPTION); + + if (quiet) { + if (verbose != 0) { + pr_err(" Error: -v and -q are exclusive.\n"); + return -EINVAL; + } + verbose = -1; + } + if (argc > 0) { if (strcmp(argv[0], "-") == 0) { usage_with_options_msg(probe_usage, options, "'-' is not supported.\n"); } - if (params.command && params.command != 'a') { + if (params->command && params->command != 'a') { usage_with_options_msg(probe_usage, options, "another command except --add is set.\n"); } @@ -621,16 +653,12 @@ __cmd_probe(int argc, const char **argv) pr_err_with_code(" Error: Command Parse Error.", ret); return ret; } - params.command = 'a'; + params->command = 'a'; } - if (params.quiet) { - if (verbose != 0) { - pr_err(" Error: -v and -q are exclusive.\n"); - return -EINVAL; - } - verbose = -1; - } + ret = symbol__validate_sym_arguments(); + if (ret) + return ret; if (probe_conf.max_probes == 0) probe_conf.max_probes = MAX_PROBES; @@ -645,75 +673,80 @@ __cmd_probe(int argc, const char **argv) * nor change running kernel. So if user gives offline vmlinux, * ignore its buildid. */ - if (!strchr("lda", params.command) && symbol_conf.vmlinux_name) + if (!strchr("lda", params->command) && symbol_conf.vmlinux_name) symbol_conf.ignore_vmlinux_buildid = true; - switch (params.command) { + switch (params->command) { case 'l': - if (params.uprobes) { + if (params->uprobes) { pr_err(" Error: Don't use --list with --exec.\n"); parse_options_usage(probe_usage, options, "l", true); parse_options_usage(NULL, options, "x", true); return -EINVAL; } - ret = show_perf_probe_events(params.filter); + ret = show_perf_probe_events(params->filter); if (ret < 0) pr_err_with_code(" Error: Failed to show event list.", ret); return ret; case 'F': - ret = show_available_funcs(params.target, params.nsi, - params.filter, params.uprobes); + ret = show_available_funcs(params->target, params->nsi, + params->filter, params->uprobes); if (ret < 0) pr_err_with_code(" Error: Failed to show functions.", ret); return ret; #ifdef HAVE_DWARF_SUPPORT case 'L': - ret = show_line_range(¶ms.line_range, params.target, - params.nsi, params.uprobes); + ret = show_line_range(¶ms->line_range, params->target, + params->nsi, params->uprobes); if (ret < 0) pr_err_with_code(" Error: Failed to show lines.", ret); return ret; case 'V': - if (!params.filter) - params.filter = strfilter__new(DEFAULT_VAR_FILTER, + if (!params->filter) + params->filter = strfilter__new(DEFAULT_VAR_FILTER, NULL); - ret = show_available_vars(params.events, params.nevents, - params.filter); + ret = show_available_vars(params->events, params->nevents, + params->filter); if (ret < 0) pr_err_with_code(" Error: Failed to show vars.", ret); return ret; #endif case 'd': - ret = perf_del_probe_events(params.filter); + ret = perf_del_probe_events(params->filter); if (ret < 0) { pr_err_with_code(" Error: Failed to delete events.", ret); return ret; } break; case 'D': + if (probe_conf.bootconfig && params->uprobes) { + pr_err(" Error: --bootconfig doesn't support uprobes.\n"); + return -EINVAL; + } + fallthrough; case 'a': /* Ensure the last given target is used */ - if (params.target && !params.target_used) { + if (params->target && !params->target_used) { pr_err(" Error: -x/-m must follow the probe definitions.\n"); parse_options_usage(probe_usage, options, "m", true); parse_options_usage(NULL, options, "x", true); return -EINVAL; } - ret = perf_add_probe_events(params.events, params.nevents); + ret = perf_add_probe_events(params->events, params->nevents); if (ret < 0) { /* * When perf_add_probe_events() fails it calls * cleanup_perf_probe_events(pevs, npevs), i.e. - * cleanup_perf_probe_events(params.events, params.nevents), which + * cleanup_perf_probe_events(params->events, params->nevents), which * will call clear_perf_probe_event(), so set nevents to zero * to avoid cleanup_params() to call clear_perf_probe_event() again * on the same pevs. */ - params.nevents = 0; + params->nevents = 0; pr_err_with_code(" Error: Failed to add events.", ret); return ret; } |