X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng%2Fcommands%2Flist.c;h=418fccf7c9102387b0c7ede6a74c36ed6d569634;hp=12499ee408f1e545b3afbe727f2b0c3659a23082;hb=d113fbc8270a4c2089c6e1aa1f5f5c5bb3f4c9dd;hpb=ade7ce5245446944d27824943142773f7e4d0674 diff --git a/src/bin/lttng/commands/list.c b/src/bin/lttng/commands/list.c index 12499ee40..418fccf7c 100644 --- a/src/bin/lttng/commands/list.c +++ b/src/bin/lttng/commands/list.c @@ -15,7 +15,7 @@ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ -#define _GNU_SOURCE +#define _LGPL_SOURCE #include #include #include @@ -24,6 +24,7 @@ #include #include +#include #include "../command.h" @@ -36,11 +37,6 @@ static char *opt_channel; static int opt_domain; static int opt_fields; static int opt_syscall; -#if 0 -/* Not implemented yet */ -static char *opt_cmd_name; -static pid_t opt_pid; -#endif const char *indent4 = " "; const char *indent6 = " "; @@ -57,57 +53,20 @@ static struct mi_writer *writer; static struct poptOption long_options[] = { /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ - {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, - {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0}, - {"jul", 'j', POPT_ARG_VAL, &opt_jul, 1, 0, 0}, - {"log4j", 'l', POPT_ARG_VAL, &opt_log4j, 1, 0, 0}, - {"python", 'p', POPT_ARG_VAL, &opt_python, 1, 0, 0}, -#if 0 - /* Not implemented yet */ - {"userspace", 'u', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, &opt_cmd_name, OPT_USERSPACE, 0, 0}, - {"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0}, -#else - {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0}, -#endif - {"channel", 'c', POPT_ARG_STRING, &opt_channel, 0, 0, 0}, - {"domain", 'd', POPT_ARG_VAL, &opt_domain, 1, 0, 0}, - {"fields", 'f', POPT_ARG_VAL, &opt_fields, 1, 0, 0}, - {"syscall", 'S', POPT_ARG_VAL, &opt_syscall, 1, 0, 0}, + {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, + {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0}, + {"jul", 'j', POPT_ARG_VAL, &opt_jul, 1, 0, 0}, + {"log4j", 'l', POPT_ARG_VAL, &opt_log4j, 1, 0, 0}, + {"python", 'p', POPT_ARG_VAL, &opt_python, 1, 0, 0}, + {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0}, + {"channel", 'c', POPT_ARG_STRING, &opt_channel, 0, 0, 0}, + {"domain", 'd', POPT_ARG_VAL, &opt_domain, 1, 0, 0}, + {"fields", 'f', POPT_ARG_VAL, &opt_fields, 1, 0, 0}, + {"syscall", 'S', POPT_ARG_VAL, &opt_syscall, 1, 0, 0}, {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, {0, 0, 0, 0, 0, 0, 0} }; -/* - * usage - */ -static void usage(FILE *ofp) -{ - fprintf(ofp, "usage: lttng list [OPTIONS] [SESSION [SESSION OPTIONS]]\n"); - fprintf(ofp, "\n"); - fprintf(ofp, "With no arguments, list available tracing session(s)\n"); - fprintf(ofp, "\n"); - fprintf(ofp, "Without a session, -k lists available kernel events\n"); - fprintf(ofp, "Without a session, -u lists available userspace events\n"); - fprintf(ofp, "\n"); - fprintf(ofp, " -h, --help Show this help\n"); - fprintf(ofp, " --list-options Simple listing of options\n"); - fprintf(ofp, " -k, --kernel Select kernel domain\n"); - fprintf(ofp, " -u, --userspace Select user-space domain.\n"); - fprintf(ofp, " -j, --jul Apply for Java application using JUL\n"); - fprintf(ofp, " -l, --log4j Apply for Java application using LOG4J\n"); - fprintf(ofp, " -p, --python Apply for Python application using logging\n"); - fprintf(ofp, " -f, --fields List event fields.\n"); - fprintf(ofp, " --syscall List available system calls.\n"); -#if 0 - fprintf(ofp, " -p, --pid PID List user-space events by PID\n"); -#endif - fprintf(ofp, "\n"); - fprintf(ofp, "Session Options:\n"); - fprintf(ofp, " -c, --channel NAME List details of a channel\n"); - fprintf(ofp, " -d, --domain List available domain(s)\n"); - fprintf(ofp, "\n"); -} - /* * Get command line from /proc for a specific pid. * @@ -119,7 +78,8 @@ static char *get_cmdline_by_pid(pid_t pid) int ret; FILE *fp = NULL; char *cmdline = NULL; - char path[20]; /* Can't go bigger than /proc/65535/cmdline */ + /* Can't go bigger than /proc/LTTNG_MAX_PID/cmdline */ + char path[sizeof("/proc//cmdline") + sizeof(LTTNG_MAX_PID_STR) - 1]; snprintf(path, sizeof(path), "/proc/%d/cmdline", pid); fp = fopen(path, "r"); @@ -128,14 +88,14 @@ static char *get_cmdline_by_pid(pid_t pid) } /* Caller must free() *cmdline */ - cmdline = malloc(PATH_MAX); + cmdline = zmalloc(PATH_MAX); if (!cmdline) { - perror("malloc cmdline"); + PERROR("malloc cmdline"); goto end; } ret = fread(cmdline, 1, PATH_MAX, fp); if (ret < 0) { - perror("fread proc list"); + PERROR("fread proc list"); } end: @@ -178,21 +138,9 @@ const char *enabled_string(int value) } static -const char *filter_string(int value) +const char *safe_string(const char *str) { - switch (value) { - case 1: return " [with filter]"; - default: return ""; - } -} - -static -const char *exclusion_string(int value) -{ - switch (value) { - case 1: return " [has exclusions]"; - default: return ""; - } + return str ? str : ""; } static const char *logleveltype_string(enum lttng_loglevel_type value) @@ -224,11 +172,104 @@ static const char *bitness_event(enum lttng_event_flag flags) } } +/* + * Get exclusion names message for a single event. + * + * Returned pointer must be freed by caller. Returns NULL on error. + */ +static char *get_exclusion_names_msg(struct lttng_event *event) +{ + int ret; + int exclusion_count; + char *exclusion_msg = NULL; + char *at; + size_t i; + const char * const exclusion_fmt = " [exclusions: "; + const size_t exclusion_fmt_len = strlen(exclusion_fmt); + + exclusion_count = lttng_event_get_exclusion_name_count(event); + if (exclusion_count < 0) { + goto end; + } else if (exclusion_count == 0) { + /* + * No exclusions: return copy of empty string so that + * it can be freed by caller. + */ + exclusion_msg = strdup(""); + goto end; + } + + /* + * exclusion_msg's size is bounded by the exclusion_fmt string, + * a comma per entry, the entry count (fixed-size), a closing + * bracket, and a trailing \0. + */ + exclusion_msg = malloc(exclusion_count + + exclusion_count * LTTNG_SYMBOL_NAME_LEN + + exclusion_fmt_len + 1); + if (!exclusion_msg) { + goto end; + } + + at = strcpy(exclusion_msg, exclusion_fmt) + exclusion_fmt_len; + for (i = 0; i < exclusion_count; ++i) { + const char *name; + + /* Append comma between exclusion names */ + if (i > 0) { + *at = ','; + at++; + } + + ret = lttng_event_get_exclusion_name(event, i, &name); + if (ret) { + /* Prints '?' on local error; should never happen */ + *at = '?'; + at++; + continue; + } + + /* Append exclusion name */ + at += sprintf(at, "%s", name); + } + + /* This also puts a final '\0' at the end of exclusion_msg */ + strcpy(at, "]"); + +end: + return exclusion_msg; +} + /* * Pretty print single event. */ static void print_events(struct lttng_event *event) { + int ret; + const char *filter_str; + char *filter_msg = NULL; + char *exclusion_msg = NULL; + + ret = lttng_event_get_filter_expression(event, &filter_str); + + if (ret) { + filter_msg = strdup(" [failed to retrieve filter]"); + } else if (filter_str) { + const char * const filter_fmt = " [filter: '%s']"; + + filter_msg = malloc(strlen(filter_str) + + strlen(filter_fmt) + 1); + if (filter_msg) { + sprintf(filter_msg, filter_fmt, + filter_str); + } + } + + exclusion_msg = get_exclusion_names_msg(event); + if (!exclusion_msg) { + exclusion_msg = strdup(" [failed to retrieve exclusions]"); + } + switch (event->type) { case LTTNG_EVENT_TRACEPOINT: { @@ -240,22 +281,22 @@ static void print_events(struct lttng_event *event) mi_lttng_loglevel_string(event->loglevel, handle->domain.type), event->loglevel, enabled_string(event->enabled), - exclusion_string(event->exclusion), - filter_string(event->filter)); + safe_string(exclusion_msg), + safe_string(filter_msg)); } else { MSG("%s%s (type: tracepoint)%s%s%s", indent6, event->name, enabled_string(event->enabled), - exclusion_string(event->exclusion), - filter_string(event->filter)); + safe_string(exclusion_msg), + safe_string(filter_msg)); } break; } case LTTNG_EVENT_FUNCTION: MSG("%s%s (type: function)%s%s", indent6, event->name, enabled_string(event->enabled), - filter_string(event->filter)); + safe_string(filter_msg)); if (event->attr.probe.addr != 0) { MSG("%saddr: 0x%" PRIx64, indent8, event->attr.probe.addr); } else { @@ -266,7 +307,7 @@ static void print_events(struct lttng_event *event) case LTTNG_EVENT_PROBE: MSG("%s%s (type: probe)%s%s", indent6, event->name, enabled_string(event->enabled), - filter_string(event->filter)); + safe_string(filter_msg)); if (event->attr.probe.addr != 0) { MSG("%saddr: 0x%" PRIx64, indent8, event->attr.probe.addr); } else { @@ -277,25 +318,29 @@ static void print_events(struct lttng_event *event) case LTTNG_EVENT_FUNCTION_ENTRY: MSG("%s%s (type: function)%s%s", indent6, event->name, enabled_string(event->enabled), - filter_string(event->filter)); + safe_string(filter_msg)); MSG("%ssymbol: \"%s\"", indent8, event->attr.ftrace.symbol_name); break; case LTTNG_EVENT_SYSCALL: - MSG("%s%s%s%s%s", indent6, event->name, + MSG("%s%s%s%s%s%s", indent6, event->name, (opt_syscall ? "" : " (type:syscall)"), enabled_string(event->enabled), - bitness_event(event->flags)); + bitness_event(event->flags), + safe_string(filter_msg)); break; case LTTNG_EVENT_NOOP: MSG("%s (type: noop)%s%s", indent6, enabled_string(event->enabled), - filter_string(event->filter)); + safe_string(filter_msg)); break; case LTTNG_EVENT_ALL: /* We should never have "all" events in list. */ assert(0); break; } + + free(filter_msg); + free(exclusion_msg); } static const char *field_type(struct lttng_event_field *field) @@ -351,7 +396,7 @@ static int mi_list_agent_ust_events(struct lttng_event *events, int count, goto end; } - /* Open pids element */ + /* Open pids element element */ ret = mi_lttng_pids_open(writer); if (ret) { goto end; @@ -360,7 +405,7 @@ static int mi_list_agent_ust_events(struct lttng_event *events, int count, for (i = 0; i < count; i++) { if (cur_pid != events[i].pid) { if (pid_element_open) { - /* Close the previous events and pid element */ + /* Close the previous events and pid element */ ret = mi_lttng_close_multi_element(writer, 2); if (ret) { goto end; @@ -419,8 +464,8 @@ static int list_agent_events(void) { int i, size, ret = CMD_SUCCESS; struct lttng_domain domain; - struct lttng_handle *handle; - struct lttng_event *event_list; + struct lttng_handle *handle = NULL; + struct lttng_event *event_list = NULL; pid_t cur_pid = 0; char *cmdline = NULL; const char *agent_domain_str; @@ -432,6 +477,10 @@ static int list_agent_events(void) domain.type = LTTNG_DOMAIN_LOG4J; } else if (opt_python) { domain.type = LTTNG_DOMAIN_PYTHON; + } else { + ERR("Invalid agent domain selected."); + ret = CMD_ERROR; + goto error; } agent_domain_str = get_domain_str(domain.type); @@ -500,7 +549,7 @@ static int list_ust_events(void) int i, size, ret = CMD_SUCCESS; struct lttng_domain domain; struct lttng_handle *handle; - struct lttng_event *event_list; + struct lttng_event *event_list = NULL; pid_t cur_pid = 0; char *cmdline = NULL; @@ -572,6 +621,8 @@ static int mi_list_ust_event_fields(struct lttng_event_field *fields, int count, int event_element_open = 0; struct lttng_event cur_event; + memset(&cur_event, 0, sizeof(cur_event)); + /* Open domains element */ ret = mi_lttng_domains_open(writer); if (ret) { @@ -668,7 +719,7 @@ static int mi_list_ust_event_fields(struct lttng_event_field *fields, int count, } } - /* Close pids, domain, domains */ + /* Close pid, domain, domains */ ret = mi_lttng_close_multi_element(writer, 3); end: return ret; @@ -992,11 +1043,43 @@ static int list_session_agent_events(void) } for (i = 0; i < count; i++) { - MSG("%s- %s%s (loglevel%s %s)", indent4, events[i].name, - enabled_string(events[i].enabled), - logleveltype_string(events[i].loglevel_type), - mi_lttng_loglevel_string(events[i].loglevel, - handle->domain.type)); + const char *filter_str; + char *filter_msg = NULL; + struct lttng_event *event = &events[i]; + + ret = lttng_event_get_filter_expression(event, + &filter_str); + if (ret) { + filter_msg = strdup(" [failed to retrieve filter]"); + } else if (filter_str) { + const char * const filter_fmt = + " [filter: '%s']"; + + filter_msg = malloc(strlen(filter_str) + + strlen(filter_fmt) + 1); + if (filter_msg) { + sprintf(filter_msg, filter_fmt, + filter_str); + } + } + + if (event->loglevel_type != + LTTNG_EVENT_LOGLEVEL_ALL) { + MSG("%s- %s%s (loglevel%s %s)%s", indent4, + event->name, + enabled_string(event->enabled), + logleveltype_string( + event->loglevel_type), + mi_lttng_loglevel_string( + event->loglevel, + handle->domain.type), + safe_string(filter_msg)); + } else { + MSG("%s- %s%s%s", indent4, event->name, + enabled_string(event->enabled), + safe_string(filter_msg)); + } + free(filter_msg); } MSG(""); @@ -1083,6 +1166,23 @@ error: */ static void print_channel(struct lttng_channel *channel) { + int ret; + uint64_t discarded_events, lost_packets; + + ret = lttng_channel_get_discarded_event_count(channel, + &discarded_events); + if (ret) { + ERR("Failed to retrieve discarded event count of channel"); + return; + } + + ret = lttng_channel_get_lost_packet_count(channel, + &lost_packets); + if (ret) { + ERR("Failed to retrieve lost packet count of channel"); + return; + } + MSG("- %s:%s\n", channel->name, enabled_string(channel->enabled)); MSG("%sAttributes:", indent4); @@ -1093,6 +1193,8 @@ static void print_channel(struct lttng_channel *channel) MSG("%sread timer interval: %u", indent6, channel->attr.read_timer_interval); MSG("%strace file count: %" PRIu64, indent6, channel->attr.tracefile_count); MSG("%strace file size (bytes): %" PRIu64, indent6, channel->attr.tracefile_size); + MSG("%sdiscarded events: %" PRIu64, indent6, discarded_events); + MSG("%slost packets: %" PRIu64, indent6, lost_packets); switch (channel->attr.output) { case LTTNG_EVENT_SPLICE: MSG("%soutput: splice()", indent6); @@ -1245,6 +1347,97 @@ error_channels: return ret; } +/* + * List tracker PID(s) of session and domain. + */ +static int list_tracker_pids(void) +{ + int ret = 0; + int enabled; + int *pids = NULL; + size_t nr_pids; + + ret = lttng_list_tracker_pids(handle, + &enabled, &pids, &nr_pids); + if (ret) { + return ret; + } + if (enabled) { + int i; + _MSG("PID tracker: ["); + + /* Mi tracker_pid element*/ + if (writer) { + /* Open tracker_pid and targets elements */ + ret = mi_lttng_pid_tracker_open(writer); + if (ret) { + goto end; + } + } + + for (i = 0; i < nr_pids; i++) { + if (i) { + _MSG(","); + } + _MSG(" %d", pids[i]); + + /* Mi */ + if (writer) { + ret = mi_lttng_pid_target(writer, pids[i], 0); + if (ret) { + goto end; + } + } + } + _MSG(" ]\n\n"); + + /* Mi close tracker_pid and targets */ + if (writer) { + ret = mi_lttng_close_multi_element(writer,2); + if (ret) { + goto end; + } + } + } +end: + free(pids); + return ret; + +} + +/* + * List all tracker of a domain + */ +static int list_trackers(void) +{ + int ret; + + /* Trackers listing */ + if (lttng_opt_mi) { + ret = mi_lttng_trackers_open(writer); + if (ret) { + goto end; + } + } + + /* pid tracker */ + ret = list_tracker_pids(); + if (ret) { + goto end; + } + + if (lttng_opt_mi) { + /* Close trackers element */ + ret = mi_lttng_writer_close_element(writer); + if (ret) { + goto end; + } + } + +end: + return ret; +} + /* * Machine interface * Find the session with session_name as name @@ -1377,8 +1570,11 @@ static int list_sessions(const char *session_name) active_string(sessions[i].enabled), snapshot_string(sessions[i].snapshot_mode)); MSG("%sTrace path: %s", indent4, sessions[i].path); - MSG("%sLive timer interval (usec): %u\n", indent4, - sessions[i].live_timer_interval); + if (sessions[i].live_timer_interval != 0) { + MSG("%sLive timer interval (usec): %u", indent4, + sessions[i].live_timer_interval); + } + MSG(""); } } @@ -1504,7 +1700,6 @@ int cmd_list(int argc, const char **argv) memset(&domain, 0, sizeof(domain)); if (argc < 1) { - usage(stderr); ret = CMD_ERROR; goto end; } @@ -1515,7 +1710,7 @@ int cmd_list(int argc, const char **argv) while ((opt = poptGetNextOpt(pc)) != -1) { switch (opt) { case OPT_HELP: - usage(stdout); + SHOW_HELP(); goto end; case OPT_USERSPACE: opt_userspace = 1; @@ -1524,7 +1719,6 @@ int cmd_list(int argc, const char **argv) list_cmd_options(stdout, long_options); goto end; default: - usage(stderr); ret = CMD_UNDEFINED; goto end; } @@ -1666,6 +1860,14 @@ int cmd_list(int argc, const char **argv) } + + /* Trackers */ + ret = list_trackers(); + if (ret) { + goto end; + } + + /* Channels */ ret = list_channels(opt_channel); if (ret) { goto end; @@ -1750,7 +1952,20 @@ int cmd_list(int argc, const char **argv) if (ret) { goto end; } - continue; + + goto next_domain; + } + + switch (domains[i].type) { + case LTTNG_DOMAIN_KERNEL: + case LTTNG_DOMAIN_UST: + ret = list_trackers(); + if (ret) { + goto end; + } + break; + default: + break; } ret = list_channels(opt_channel); @@ -1758,6 +1973,7 @@ int cmd_list(int argc, const char **argv) goto end; } +next_domain: if (lttng_opt_mi) { /* Close domain element */ ret = mi_lttng_writer_close_element(writer);