* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
-#define _GNU_SOURCE
#include <sys/utsname.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <string.h>
-#undef _GNU_SOURCE
#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 "util/debugfs.h"
+#include <lk/debugfs.h>
#include "util/parse-options.h"
-#include "util/parse-events.h" /* For debugfs_path */
#include "util/probe-finder.h"
#include "util/probe-event.h"
-#define MAX_PATH_LEN 256
+#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 void parse_probe_event(const char *str)
+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)
- die("Too many probes (> %d) are specified.", MAX_PROBES);
+ if (++params.nevents == MAX_PROBES) {
+ pr_err("Too many probes (> %d) were specified.", MAX_PROBES);
+ return -1;
+ }
- /* Parse a perf-probe command into event */
- parse_perf_probe_command(str, pev);
+ 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 void parse_probe_event_argv(int argc, const char **argv)
+static int parse_probe_event_argv(int argc, const char **argv)
{
- int i, len;
+ 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++)
+ for (i = 0; i < argc; i++) {
+ if (i == 0 && found_target)
+ continue;
+
len += strlen(argv[i]) + 1;
- buf = xzalloc(len + 1);
+ }
+ buf = zalloc(len + 1);
+ if (buf == NULL)
+ return -ENOMEM;
len = 0;
- for (i = 0; i < argc; i++)
+ for (i = 0; i < argc; i++) {
+ if (i == 0 && found_target)
+ continue;
+
len += sprintf(&buf[len], "%s ", argv[i]);
- parse_probe_event(buf);
+ }
+ params.mod_events = true;
+ ret = parse_probe_event(buf);
free(buf);
+ return ret;
}
-static int opt_add_probe_event(const struct option *opt __used,
- const char *str, int unset __used)
+static int opt_add_probe_event(const struct option *opt __maybe_unused,
+ const char *str, int unset __maybe_unused)
{
- if (str)
- parse_probe_event(str);
- return 0;
+ if (str) {
+ params.mod_events = true;
+ return parse_probe_event(str);
+ } else
+ return 0;
}
-static int opt_del_probe_event(const struct option *opt __used,
- const char *str, int unset __used)
+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
-static int opt_show_lines(const struct option *opt __used,
- const char *str, int unset __used)
+ 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)
{
- if (str)
- parse_line_range_desc(str, ¶ms.line_range);
- INIT_LIST_HEAD(¶ms.line_range.line_list);
+ 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;
- return 0;
+ 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 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",
+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 --line 'LINEDESC'",
+ "perf probe [<options>] --line 'LINEDESC'",
+ "perf probe [<options>] --vars 'PROBEPOINT'",
#endif
- NULL
+ NULL
};
-
-static const struct option options[] = {
- OPT_BOOLEAN('v', "verbose", &verbose,
+ 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('a', "add", NULL,
#ifdef DWARF_SUPPORT
"[EVENT=]FUNC[@SRC][+OFF|%return|:RL|;PT]|SRC:AL|SRC;PT"
- " [ARG ...]",
+ " [[NAME=]ARG ...]",
#else
- "[EVENT=]FUNC[+OFF|%return] [ARG ...]",
+ "[EVENT=]FUNC[+OFF|%return] [[NAME=]ARG ...]",
#endif
"probe point definition, where\n"
"\t\tGROUP:\tGroup name (optional)\n"
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;
-int cmd_probe(int argc, const char **argv, const char *prefix __used)
-{
argc = parse_options(argc, argv, options, probe_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
if (argc > 0) {
pr_warning(" Error: '-' is not supported.\n");
usage_with_options(probe_usage, options);
}
- parse_probe_event_argv(argc, argv);
+ 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_lines && !params.show_funcs))
usage_with_options(probe_usage, options);
- if (debugfs_valid_mountpoint(debugfs_path) < 0)
- die("Failed to find debugfs path.");
+ /*
+ * 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_warning(" Error: Don't use --list with"
- " --add/--del.\n");
+ pr_err(" Error: Don't use --funcs with"
+ " --add/--del.\n");
usage_with_options(probe_usage, options);
}
if (params.show_lines) {
- pr_warning(" Error: Don't use --list with --line.\n");
+ pr_err(" Error: Don't use --funcs with --line.\n");
usage_with_options(probe_usage, options);
}
- show_perf_probe_events();
- return 0;
+ 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) {
- if (params.nevents != 0 || params.dellist) {
- pr_warning(" Error: Don't use --line with"
- " --add/--del.\n");
+ 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);
}
- show_line_range(¶ms.line_range);
- return 0;
+ 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) {
- del_perf_probe_events(params.dellist);
+ ret = del_perf_probe_events(params.dellist);
strlist__delete(params.dellist);
- if (params.nevents == 0)
- return 0;
+ if (ret < 0) {
+ pr_err(" Error: Failed to delete events. (%d)\n", ret);
+ return ret;
+ }
}
- add_perf_probe_events(params.events, params.nevents, params.force_add);
+ 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;
}
-