diff options
Diffstat (limited to 'src/tools/perf/builtin-probe.c')
| -rw-r--r-- | src/tools/perf/builtin-probe.c | 470 |
1 files changed, 0 insertions, 470 deletions
diff --git a/src/tools/perf/builtin-probe.c b/src/tools/perf/builtin-probe.c deleted file mode 100644 index e8a66f9..0000000 --- a/src/tools/perf/builtin-probe.c +++ /dev/null @@ -1,470 +0,0 @@ -/* - * builtin-probe.c - * - * Builtin probe command: Set up probe events by C expression - * - * Written by Masami Hiramatsu <mhiramat@redhat.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - * - */ -#include <sys/utsname.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <errno.h> -#include <stdio.h> -#include <unistd.h> -#include <stdlib.h> -#include <string.h> - -#include "perf.h" -#include "builtin.h" -#include "util/util.h" -#include "util/strlist.h" -#include "util/strfilter.h" -#include "util/symbol.h" -#include "util/debug.h" -#include <lk/debugfs.h> -#include "util/parse-options.h" -#include "util/probe-finder.h" -#include "util/probe-event.h" - -#define DEFAULT_VAR_FILTER "!__k???tab_* & !__crc_*" -#define DEFAULT_FUNC_FILTER "!_*" - -/* Session management structure */ -static struct { - bool list_events; - bool force_add; - bool show_lines; - bool show_vars; - bool show_ext_vars; - bool show_funcs; - bool mod_events; - bool uprobes; - int nevents; - struct perf_probe_event events[MAX_PROBES]; - struct strlist *dellist; - struct line_range line_range; - const char *target; - int max_probe_points; - struct strfilter *filter; -} 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]; - int ret; - - 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; - - /* Parse a perf-probe command into event */ - ret = parse_perf_probe_command(str, pev); - pr_debug("%d arguments\n", pev->nargs); - - return ret; -} - -static int set_target(const char *ptr) -{ - int found = 0; - const char *buf; - - /* - * The first argument after options can be an absolute path - * to an executable / library or kernel module. - * - * TODO: Support relative path, and $PATH, $LD_LIBRARY_PATH, - * short module name. - */ - if (!params.target && ptr && *ptr == '/') { - params.target = ptr; - found = 1; - buf = ptr + (strlen(ptr) - 3); - - if (strcmp(buf, ".ko")) - params.uprobes = true; - - } - - return found; -} - -static int parse_probe_event_argv(int argc, const char **argv) -{ - int i, len, ret, found_target; - char *buf; - - found_target = set_target(argv[0]); - if (found_target && argc == 1) - return 0; - - /* Bind up rest arguments */ - len = 0; - for (i = 0; i < argc; i++) { - if (i == 0 && found_target) - continue; - - len += strlen(argv[i]) + 1; - } - buf = zalloc(len + 1); - if (buf == NULL) - return -ENOMEM; - len = 0; - for (i = 0; i < argc; i++) { - if (i == 0 && found_target) - continue; - - len += sprintf(&buf[len], "%s ", argv[i]); - } - params.mod_events = true; - ret = parse_probe_event(buf); - free(buf); - return ret; -} - -static int opt_add_probe_event(const struct option *opt __maybe_unused, - const char *str, int unset __maybe_unused) -{ - if (str) { - params.mod_events = true; - return parse_probe_event(str); - } else - return 0; -} - -static int opt_del_probe_event(const struct option *opt __maybe_unused, - const char *str, int unset __maybe_unused) -{ - if (str) { - params.mod_events = true; - if (!params.dellist) - params.dellist = strlist__new(true, NULL); - strlist__add(params.dellist, str); - } - return 0; -} - -static int opt_set_target(const struct option *opt, const char *str, - int unset __maybe_unused) -{ - int ret = -ENOENT; - - if (str && !params.target) { - if (!strcmp(opt->long_name, "exec")) - params.uprobes = true; -#ifdef DWARF_SUPPORT - else if (!strcmp(opt->long_name, "module")) - params.uprobes = false; -#endif - else - return ret; - - params.target = str; - ret = 0; - } - - return ret; -} - -#ifdef DWARF_SUPPORT -static int opt_show_lines(const struct option *opt __maybe_unused, - const char *str, int unset __maybe_unused) -{ - int ret = 0; - - if (!str) - return 0; - - if (params.show_lines) { - pr_warning("Warning: more than one --line options are" - " detected. Only the first one is valid.\n"); - return 0; - } - - params.show_lines = true; - ret = parse_line_range_desc(str, ¶ms.line_range); - INIT_LIST_HEAD(¶ms.line_range.line_list); - - return ret; -} - -static int opt_show_vars(const struct option *opt __maybe_unused, - const char *str, int unset __maybe_unused) -{ - struct perf_probe_event *pev = ¶ms.events[params.nevents]; - int ret; - - if (!str) - return 0; - - ret = parse_probe_event(str); - if (!ret && pev->nargs != 0) { - pr_err(" Error: '--vars' doesn't accept arguments.\n"); - return -EINVAL; - } - params.show_vars = true; - - return ret; -} -#endif - -static int opt_set_filter(const struct option *opt __maybe_unused, - const char *str, int unset __maybe_unused) -{ - const char *err; - - if (str) { - pr_debug2("Set filter: %s\n", str); - if (params.filter) - strfilter__delete(params.filter); - params.filter = strfilter__new(str, &err); - if (!params.filter) { - pr_err("Filter parse error at %td.\n", err - str + 1); - pr_err("Source: \"%s\"\n", str); - pr_err(" %*c\n", (int)(err - str + 1), '^'); - return -EINVAL; - } - } - - return 0; -} - -int cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused) -{ - const char * const probe_usage[] = { - "perf probe [<options>] 'PROBEDEF' ['PROBEDEF' ...]", - "perf probe [<options>] --add 'PROBEDEF' [--add 'PROBEDEF' ...]", - "perf probe [<options>] --del '[GROUP:]EVENT' ...", - "perf probe --list", -#ifdef DWARF_SUPPORT - "perf probe [<options>] --line 'LINEDESC'", - "perf probe [<options>] --vars 'PROBEPOINT'", -#endif - NULL -}; - const struct option options[] = { - OPT_INCR('v', "verbose", &verbose, - "be more verbose (show parsed arguments, etc)"), - OPT_BOOLEAN('l', "list", ¶ms.list_events, - "list up current probe events"), - OPT_CALLBACK('d', "del", NULL, "[GROUP:]EVENT", "delete a probe event.", - opt_del_probe_event), - OPT_CALLBACK('a', "add", NULL, -#ifdef DWARF_SUPPORT - "[EVENT=]FUNC[@SRC][+OFF|%return|:RL|;PT]|SRC:AL|SRC;PT" - " [[NAME=]ARG ...]", -#else - "[EVENT=]FUNC[+OFF|%return] [[NAME=]ARG ...]", -#endif - "probe point definition, where\n" - "\t\tGROUP:\tGroup name (optional)\n" - "\t\tEVENT:\tEvent name\n" - "\t\tFUNC:\tFunction name\n" - "\t\tOFF:\tOffset from function entry (in byte)\n" - "\t\t%return:\tPut the probe at function return\n" -#ifdef DWARF_SUPPORT - "\t\tSRC:\tSource code path\n" - "\t\tRL:\tRelative line number from function entry.\n" - "\t\tAL:\tAbsolute line number in file.\n" - "\t\tPT:\tLazy expression of line code.\n" - "\t\tARG:\tProbe argument (local variable name or\n" - "\t\t\tkprobe-tracer argument format.)\n", -#else - "\t\tARG:\tProbe argument (kprobe-tracer argument format.)\n", -#endif - opt_add_probe_event), - OPT_BOOLEAN('f', "force", ¶ms.force_add, "forcibly add events" - " with existing name"), -#ifdef DWARF_SUPPORT - OPT_CALLBACK('L', "line", NULL, - "FUNC[:RLN[+NUM|-RLN2]]|SRC:ALN[+NUM|-ALN2]", - "Show source code lines.", opt_show_lines), - OPT_CALLBACK('V', "vars", NULL, - "FUNC[@SRC][+OFF|%return|:RL|;PT]|SRC:AL|SRC;PT", - "Show accessible variables on PROBEDEF", opt_show_vars), - OPT_BOOLEAN('\0', "externs", ¶ms.show_ext_vars, - "Show external variables too (with --vars only)"), - OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name, - "file", "vmlinux pathname"), - OPT_STRING('s', "source", &symbol_conf.source_prefix, - "directory", "path to kernel source"), - OPT_CALLBACK('m', "module", NULL, "modname|path", - "target module name (for online) or path (for offline)", - opt_set_target), -#endif - OPT__DRY_RUN(&probe_event_dry_run), - OPT_INTEGER('\0', "max-probes", ¶ms.max_probe_points, - "Set how many probe points can be found for a probe."), - OPT_BOOLEAN('F', "funcs", ¶ms.show_funcs, - "Show potential probe-able functions."), - OPT_CALLBACK('\0', "filter", NULL, - "[!]FILTER", "Set a filter (with --vars/funcs only)\n" - "\t\t\t(default: \"" DEFAULT_VAR_FILTER "\" for --vars,\n" - "\t\t\t \"" DEFAULT_FUNC_FILTER "\" for --funcs)", - opt_set_filter), - OPT_CALLBACK('x', "exec", NULL, "executable|path", - "target executable name or path", opt_set_target), - OPT_END() - }; - int ret; - - argc = parse_options(argc, argv, options, probe_usage, - PARSE_OPT_STOP_AT_NON_OPTION); - if (argc > 0) { - if (strcmp(argv[0], "-") == 0) { - pr_warning(" Error: '-' is not supported.\n"); - usage_with_options(probe_usage, options); - } - ret = parse_probe_event_argv(argc, argv); - if (ret < 0) { - pr_err(" Error: Parse Error. (%d)\n", ret); - return ret; - } - } - - if (params.max_probe_points == 0) - params.max_probe_points = MAX_PROBES; - - if ((!params.nevents && !params.dellist && !params.list_events && - !params.show_lines && !params.show_funcs)) - usage_with_options(probe_usage, options); - - /* - * Only consider the user's kernel image path if given. - */ - symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL); - - if (params.list_events) { - if (params.mod_events) { - pr_err(" Error: Don't use --list with --add/--del.\n"); - usage_with_options(probe_usage, options); - } - if (params.show_lines) { - pr_err(" Error: Don't use --list with --line.\n"); - usage_with_options(probe_usage, options); - } - if (params.show_vars) { - pr_err(" Error: Don't use --list with --vars.\n"); - usage_with_options(probe_usage, options); - } - if (params.show_funcs) { - pr_err(" Error: Don't use --list with --funcs.\n"); - usage_with_options(probe_usage, options); - } - if (params.uprobes) { - pr_warning(" Error: Don't use --list with --exec.\n"); - usage_with_options(probe_usage, options); - } - ret = show_perf_probe_events(); - if (ret < 0) - pr_err(" Error: Failed to show event list. (%d)\n", - ret); - return ret; - } - if (params.show_funcs) { - if (params.nevents != 0 || params.dellist) { - pr_err(" Error: Don't use --funcs with" - " --add/--del.\n"); - usage_with_options(probe_usage, options); - } - if (params.show_lines) { - pr_err(" Error: Don't use --funcs with --line.\n"); - usage_with_options(probe_usage, options); - } - if (params.show_vars) { - pr_err(" Error: Don't use --funcs with --vars.\n"); - usage_with_options(probe_usage, options); - } - if (!params.filter) - params.filter = strfilter__new(DEFAULT_FUNC_FILTER, - NULL); - ret = show_available_funcs(params.target, params.filter, - params.uprobes); - strfilter__delete(params.filter); - if (ret < 0) - pr_err(" Error: Failed to show functions." - " (%d)\n", ret); - return ret; - } - -#ifdef DWARF_SUPPORT - if (params.show_lines && !params.uprobes) { - if (params.mod_events) { - pr_err(" Error: Don't use --line with" - " --add/--del.\n"); - usage_with_options(probe_usage, options); - } - if (params.show_vars) { - pr_err(" Error: Don't use --line with --vars.\n"); - usage_with_options(probe_usage, options); - } - - ret = show_line_range(¶ms.line_range, params.target); - if (ret < 0) - pr_err(" Error: Failed to show lines. (%d)\n", ret); - return ret; - } - if (params.show_vars) { - if (params.mod_events) { - pr_err(" Error: Don't use --vars with" - " --add/--del.\n"); - usage_with_options(probe_usage, options); - } - if (!params.filter) - params.filter = strfilter__new(DEFAULT_VAR_FILTER, - NULL); - - ret = show_available_vars(params.events, params.nevents, - params.max_probe_points, - params.target, - params.filter, - params.show_ext_vars); - strfilter__delete(params.filter); - if (ret < 0) - pr_err(" Error: Failed to show vars. (%d)\n", ret); - return ret; - } -#endif - - if (params.dellist) { - ret = del_perf_probe_events(params.dellist); - strlist__delete(params.dellist); - if (ret < 0) { - pr_err(" Error: Failed to delete events. (%d)\n", ret); - return ret; - } - } - - if (params.nevents) { - ret = add_perf_probe_events(params.events, params.nevents, - params.max_probe_points, - params.target, - params.force_add); - if (ret < 0) { - pr_err(" Error: Failed to add events. (%d)\n", ret); - return ret; - } - } - return 0; -} |