X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;ds=sidebyside;f=src%2Fbin%2Flttng%2Fcommands%2Fenable_events.c;h=26195af5a7582cd7c6afccda6a1d3827d6d1bd07;hb=850767541647c102a299d7fbc39c97555ac70224;hp=93ef0c5a4c090ab94e7ddc22e2acd8a803daff34;hpb=4ce78777c3ffcdd42e635ed45aa5dd3a7c7bd22d;p=lttng-tools.git diff --git a/src/bin/lttng/commands/enable_events.c b/src/bin/lttng/commands/enable_events.c index 93ef0c5a4..26195af5a 100644 --- a/src/bin/lttng/commands/enable_events.c +++ b/src/bin/lttng/commands/enable_events.c @@ -113,11 +113,11 @@ static void usage(FILE *ofp) fprintf(ofp, " e.g.:\n"); fprintf(ofp, " \"*\"\n"); fprintf(ofp, " \"app_component:na*\"\n"); - fprintf(ofp, " --probe [addr | symbol | symbol+offset]\n"); + fprintf(ofp, " --probe (addr | symbol | symbol+offset)\n"); fprintf(ofp, " Dynamic probe.\n"); fprintf(ofp, " Addr and offset can be octal (0NNN...),\n"); fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n"); - fprintf(ofp, " --function [addr | symbol | symbol+offset]\n"); + fprintf(ofp, " --function (addr | symbol | symbol+offset)\n"); fprintf(ofp, " Dynamic function entry/return probe.\n"); fprintf(ofp, " Addr and offset can be octal (0NNN...),\n"); fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n"); @@ -154,8 +154,8 @@ static void usage(FILE *ofp) fprintf(ofp, " TRACE_DEBUG = 14\n"); fprintf(ofp, " (shortcuts such as \"system\" are allowed)\n"); fprintf(ofp, " --filter \'expression\'\n"); - fprintf(ofp, " Filter expression on event fields,\n"); - fprintf(ofp, " event recording depends on evaluation.\n"); + fprintf(ofp, " Filter expression on event fields and context.\n"); + fprintf(ofp, " Event recording depends on evaluation.\n"); fprintf(ofp, " Only specify on first activation of\n"); fprintf(ofp, " a given event within a session.\n"); fprintf(ofp, " Filter only allowed when enabling\n"); @@ -168,14 +168,27 @@ static void usage(FILE *ofp) fprintf(ofp, " Expression examples:.\n"); fprintf(ofp, " \n"); fprintf(ofp, " 'intfield > 500 && intfield < 503'\n"); - fprintf(ofp, " '(stringfield == \"test\" || intfield != 10) && intfield > 33'\n"); + fprintf(ofp, " '(strfield == \"test\" || intfield != 10) && intfield > 33'\n"); fprintf(ofp, " 'doublefield > 1.1 && intfield < 5.3'\n"); fprintf(ofp, " \n"); fprintf(ofp, " Wildcards are allowed at the end of strings:\n"); fprintf(ofp, " 'seqfield1 == \"te*\"'\n"); fprintf(ofp, " In string literals, the escape character is '\\'.\n"); fprintf(ofp, " Use '\\*' for the '*' character, and '\\\\' for\n"); - fprintf(ofp, " the '\\' character.\n"); + fprintf(ofp, " the '\\' character. Wildcard match any sequence of,\n"); + fprintf(ofp, " characters including an empty sub-string (match 0 or\n"); + fprintf(ofp, " more characters).\n"); + fprintf(ofp, "\n"); + fprintf(ofp, " Context information can be used for filtering. The\n"); + fprintf(ofp, " examples below show usage of context filtering on\n"); + fprintf(ofp, " process name (with a wildcard), process ID range, and\n"); + fprintf(ofp, " unique thread ID for filtering. The process and\n"); + fprintf(ofp, " thread ID of running applications can be found under\n"); + fprintf(ofp, " columns \"PID\" and \"LWP\" of the \"ps -eLf\" command.\n"); + fprintf(ofp, "\n"); + fprintf(ofp, " '$ctx.procname == \"demo*\"'\n"); + fprintf(ofp, " '$ctx.vpid >= 4433 && $ctx.vpid < 4455'\n"); + fprintf(ofp, " '$ctx.vtid == 1234'\n"); fprintf(ofp, "\n"); } @@ -255,7 +268,11 @@ int loglevel_str_to_value(const char *inputstr) int i = 0; char str[LTTNG_SYMBOL_NAME_LEN]; - while (i < LTTNG_SYMBOL_NAME_LEN && inputstr[i] != '\0') { + /* + * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is + * added at the end of the loop so a the upper bound we avoid the overflow. + */ + while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') { str[i] = toupper(inputstr[i]); i++; } @@ -295,12 +312,24 @@ int loglevel_str_to_value(const char *inputstr) } } +static +const char *print_channel_name(const char *name) +{ + return name ? : DEFAULT_CHANNEL_NAME; +} + +static +const char *print_raw_channel_name(const char *name) +{ + return name ? : ""; +} + /* * Enabling event using the lttng API. */ static int enable_events(char *session_name) { - int err, ret = CMD_SUCCESS, warn = 0; + int ret = CMD_SUCCESS, warn = 0; char *event_name, *channel_name = NULL; struct lttng_event ev; struct lttng_domain dom; @@ -323,22 +352,14 @@ static int enable_events(char *session_name) } else if (opt_userspace) { dom.type = LTTNG_DOMAIN_UST; /* Default. */ - dom.buf_type = LTTNG_BUFFER_PER_PID; + dom.buf_type = LTTNG_BUFFER_PER_UID; } else { ERR("Please specify a tracer (-k/--kernel or -u/--userspace)"); ret = CMD_ERROR; goto error; } - if (opt_channel_name == NULL) { - err = asprintf(&channel_name, DEFAULT_CHANNEL_NAME); - if (err < 0) { - ret = CMD_FATAL; - goto error; - } - } else { - channel_name = opt_channel_name; - } + channel_name = opt_channel_name; handle = lttng_create_handle(session_name, &dom); if (handle == NULL) { @@ -375,11 +396,15 @@ static int enable_events(char *session_name) switch (-ret) { case LTTNG_ERR_KERN_EVENT_EXIST: WARN("Kernel events already enabled (channel %s, session %s)", - channel_name, session_name); + print_channel_name(channel_name), session_name); break; default: ERR("Events: %s (channel %s, session %s)", - lttng_strerror(ret), channel_name, session_name); + lttng_strerror(ret), + ret == -LTTNG_ERR_NEED_CHANNEL_NAME + ? print_raw_channel_name(channel_name) + : print_channel_name(channel_name), + session_name); break; } goto end; @@ -389,28 +414,32 @@ static int enable_events(char *session_name) case LTTNG_EVENT_TRACEPOINT: if (opt_loglevel) { MSG("All %s tracepoints are enabled in channel %s for loglevel %s", - opt_kernel ? "kernel" : "UST", channel_name, + opt_kernel ? "kernel" : "UST", + print_channel_name(channel_name), opt_loglevel); } else { MSG("All %s tracepoints are enabled in channel %s", - opt_kernel ? "kernel" : "UST", channel_name); + opt_kernel ? "kernel" : "UST", + print_channel_name(channel_name)); } break; case LTTNG_EVENT_SYSCALL: if (opt_kernel) { MSG("All kernel system calls are enabled in channel %s", - channel_name); + print_channel_name(channel_name)); } break; case LTTNG_EVENT_ALL: if (opt_loglevel) { MSG("All %s events are enabled in channel %s for loglevel %s", - opt_kernel ? "kernel" : "UST", channel_name, + opt_kernel ? "kernel" : "UST", + print_channel_name(channel_name), opt_loglevel); } else { MSG("All %s events are enabled in channel %s", - opt_kernel ? "kernel" : "UST", channel_name); + opt_kernel ? "kernel" : "UST", + print_channel_name(channel_name)); } break; default: @@ -425,18 +454,19 @@ static int enable_events(char *session_name) ret = lttng_enable_event_with_filter(handle, &ev, channel_name, opt_filter); if (ret < 0) { - fprintf(stderr, "Ret filter: %d\n", ret); switch (-ret) { case LTTNG_ERR_FILTER_EXIST: - WARN("Filter on events is already enabled" + WARN("Filter on all events is already enabled" " (channel %s, session %s)", - channel_name, session_name); + print_channel_name(channel_name), session_name); break; - case LTTNG_ERR_FILTER_INVAL: - case LTTNG_ERR_FILTER_NOMEM: - ERR("%s", lttng_strerror(ret)); default: - ERR("Setting filter: '%s'", opt_filter); + ERR("All events: %s (channel %s, session %s, filter \'%s\')", + lttng_strerror(ret), + ret == -LTTNG_ERR_NEED_CHANNEL_NAME + ? print_raw_channel_name(channel_name) + : print_channel_name(channel_name), + session_name, opt_filter); break; } goto error; @@ -458,7 +488,8 @@ static int enable_events(char *session_name) /* Kernel tracer action */ if (opt_kernel) { DBG("Enabling kernel event %s for channel %s", - event_name, channel_name); + event_name, + print_channel_name(channel_name)); switch (opt_event_type) { case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */ @@ -513,7 +544,7 @@ static int enable_events(char *session_name) #endif DBG("Enabling UST event %s for channel %s, loglevel %s", event_name, - channel_name, opt_loglevel ? : ""); + print_channel_name(channel_name), opt_loglevel ? : ""); switch (opt_event_type) { case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */ @@ -558,17 +589,23 @@ static int enable_events(char *session_name) switch (-ret) { case LTTNG_ERR_KERN_EVENT_EXIST: WARN("Kernel event %s already enabled (channel %s, session %s)", - event_name, channel_name, session_name); + event_name, + print_channel_name(channel_name), session_name); break; default: ERR("Event %s: %s (channel %s, session %s)", event_name, - lttng_strerror(ret), channel_name, session_name); + lttng_strerror(ret), + ret == -LTTNG_ERR_NEED_CHANNEL_NAME + ? print_raw_channel_name(channel_name) + : print_channel_name(channel_name), + session_name); break; } warn = 1; } else { MSG("%s event %s created in channel %s", - opt_kernel ? "kernel": "UST", event_name, channel_name); + opt_kernel ? "kernel": "UST", event_name, + print_channel_name(channel_name)); } } @@ -580,14 +617,16 @@ static int enable_events(char *session_name) case LTTNG_ERR_FILTER_EXIST: WARN("Filter on event %s is already enabled" " (channel %s, session %s)", - event_name, channel_name, session_name); + event_name, + print_channel_name(channel_name), session_name); break; - case LTTNG_ERR_FILTER_INVAL: - case LTTNG_ERR_FILTER_NOMEM: - ERR("%s", lttng_strerror(ret)); default: - ERR("Setting filter for event %s: '%s'", ev.name, - opt_filter); + ERR("Event %s: %s (channel %s, session %s, filter \'%s\')", ev.name, + lttng_strerror(ret), + ret == -LTTNG_ERR_NEED_CHANNEL_NAME + ? print_raw_channel_name(channel_name) + : print_channel_name(channel_name), + session_name, opt_filter); break; } goto error; @@ -605,9 +644,6 @@ error: if (warn) { ret = CMD_WARNING; } - if (opt_channel_name == NULL) { - free(channel_name); - } lttng_destroy_handle(handle); return ret; @@ -621,6 +657,7 @@ int cmd_enable_events(int argc, const char **argv) int opt, ret = CMD_SUCCESS; static poptContext pc; char *session_name = NULL; + int event_type = -1; pc = poptGetContext(NULL, argc, argv, long_options, 0); poptReadDefaultConfig(pc, 0); @@ -669,6 +706,17 @@ int cmd_enable_events(int argc, const char **argv) ret = CMD_UNDEFINED; goto end; } + + /* Validate event type. Multiple event type are not supported. */ + if (event_type == -1) { + event_type = opt_event_type; + } else { + if (event_type != opt_event_type) { + ERR("Multiple event type not supported."); + ret = CMD_ERROR; + goto end; + } + } } opt_event_list = (char*) poptGetArg(pc);