* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-#define _GNU_SOURCE
+#define _LGPL_SOURCE
+#include <assert.h>
#include <popt.h>
#include <stdio.h>
#include <stdlib.h>
-#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <inttypes.h>
#include <ctype.h>
+#include <common/sessiond-comm/sessiond-comm.h>
+#include <common/compat/string.h>
+#include <common/compat/getenv.h>
+#include <common/string-utils/string-utils.h>
+#include <common/utils.h>
+
+#include <lttng/constant.h>
+/* Mi dependancy */
+#include <common/mi-lttng.h>
+
#include "../command.h"
-#include <src/common/sessiond-comm/sessiond-comm.h>
+
+#if (LTTNG_SYMBOL_NAME_LEN == 256)
+#define LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API "255"
+#endif
static char *opt_event_list;
static int opt_event_type;
static int opt_kernel;
static char *opt_session_name;
static int opt_userspace;
+static int opt_jul;
+static int opt_log4j;
+static int opt_python;
static int opt_enable_all;
static char *opt_probe;
+static char *opt_userspace_probe;
static char *opt_function;
-static char *opt_function_entry_symbol;
static char *opt_channel_name;
static char *opt_filter;
-#if 0
-/* Not implemented yet */
-static char *opt_cmd_name;
-static pid_t opt_pid;
+static char *opt_exclude;
+
+#ifdef LTTNG_EMBED_HELP
+static const char help_msg[] =
+#include <lttng-enable-event.1.h>
+;
#endif
enum {
OPT_HELP = 1,
OPT_TRACEPOINT,
OPT_PROBE,
+ OPT_USERSPACE_PROBE,
OPT_FUNCTION,
- OPT_FUNCTION_ENTRY,
OPT_SYSCALL,
OPT_USERSPACE,
OPT_LOGLEVEL,
OPT_LOGLEVEL_ONLY,
OPT_LIST_OPTIONS,
OPT_FILTER,
+ OPT_EXCLUDE,
};
static struct lttng_handle *handle;
+static struct mi_writer *writer;
static struct poptOption long_options[] = {
/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
{"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
{"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
{"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 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},
{"tracepoint", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0},
{"probe", 0, POPT_ARG_STRING, &opt_probe, OPT_PROBE, 0, 0},
+ {"userspace-probe",0, POPT_ARG_STRING, &opt_userspace_probe, OPT_USERSPACE_PROBE, 0, 0},
{"function", 0, POPT_ARG_STRING, &opt_function, OPT_FUNCTION, 0, 0},
-#if 0
- /*
- * Currently removed from lttng kernel tracer. Removed from
- * lttng UI to discourage its use.
- */
- {"function:entry", 0, POPT_ARG_STRING, &opt_function_entry_symbol, OPT_FUNCTION_ENTRY, 0, 0},
-#endif
{"syscall", 0, POPT_ARG_NONE, 0, OPT_SYSCALL, 0, 0},
{"loglevel", 0, POPT_ARG_STRING, 0, OPT_LOGLEVEL, 0, 0},
{"loglevel-only", 0, POPT_ARG_STRING, 0, OPT_LOGLEVEL_ONLY, 0, 0},
{"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
{"filter", 'f', POPT_ARG_STRING, &opt_filter, OPT_FILTER, 0, 0},
+ {"exclude", 'x', POPT_ARG_STRING, &opt_exclude, OPT_EXCLUDE, 0, 0},
{0, 0, 0, 0, 0, 0, 0}
};
-/*
- * usage
- */
-static void usage(FILE *ofp)
-{
- fprintf(ofp, "usage: lttng enable-event NAME[,NAME2,...] [-k|-u] [OPTIONS] \n");
- fprintf(ofp, "\n");
- fprintf(ofp, "Options:\n");
- fprintf(ofp, " -h, --help Show this help\n");
- fprintf(ofp, " --list-options Simple listing of options\n");
- fprintf(ofp, " -s, --session NAME Apply to session name\n");
- fprintf(ofp, " -c, --channel NAME Apply to this channel\n");
- fprintf(ofp, " -a, --all Enable all tracepoints and syscalls\n");
- fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n");
- fprintf(ofp, " -u, --userspace Apply to the user-space tracer\n");
- fprintf(ofp, "\n");
- fprintf(ofp, "Event options:\n");
- fprintf(ofp, " --tracepoint Tracepoint event (default)\n");
- fprintf(ofp, " - userspace tracer supports wildcards at end of string.\n");
- fprintf(ofp, " Don't forget to quote to deal with bash expansion.\n");
- fprintf(ofp, " e.g.:\n");
- fprintf(ofp, " \"*\"\n");
- fprintf(ofp, " \"app_component:na*\"\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, " Dynamic function entry/return probe.\n");
- fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
- fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
-#if 0
- fprintf(ofp, " --function:entry symbol\n");
- fprintf(ofp, " Function tracer event\n");
-#endif
- fprintf(ofp, " --syscall System call event\n");
- fprintf(ofp, "\n");
- fprintf(ofp, " --loglevel name\n");
- fprintf(ofp, " Tracepoint loglevel range from 0 to loglevel\n");
- fprintf(ofp, " --loglevel-only name\n");
- fprintf(ofp, " Tracepoint loglevel (only this loglevel)\n");
- fprintf(ofp, "\n");
- fprintf(ofp, " The loglevel or loglevel-only options should be\n");
- fprintf(ofp, " combined with a tracepoint name or tracepoint\n");
- fprintf(ofp, " wildcard.\n");
- fprintf(ofp, " Available loglevels:\n");
- fprintf(ofp, " (higher value is more verbose)\n");
- fprintf(ofp, " TRACE_EMERG = 0\n");
- fprintf(ofp, " TRACE_ALERT = 1\n");
- fprintf(ofp, " TRACE_CRIT = 2\n");
- fprintf(ofp, " TRACE_ERR = 3\n");
- fprintf(ofp, " TRACE_WARNING = 4\n");
- fprintf(ofp, " TRACE_NOTICE = 5\n");
- fprintf(ofp, " TRACE_INFO = 6\n");
- fprintf(ofp, " TRACE_DEBUG_SYSTEM = 7\n");
- fprintf(ofp, " TRACE_DEBUG_PROGRAM = 8\n");
- fprintf(ofp, " TRACE_DEBUG_PROCESS = 9\n");
- fprintf(ofp, " TRACE_DEBUG_MODULE = 10\n");
- fprintf(ofp, " TRACE_DEBUG_UNIT = 11\n");
- fprintf(ofp, " TRACE_DEBUG_FUNCTION = 12\n");
- fprintf(ofp, " TRACE_DEBUG_LINE = 13\n");
- 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 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");
- fprintf(ofp, " events within a session before tracing\n");
- fprintf(ofp, " is started. If the filter fails to link\n");
- fprintf(ofp, " with the event within the traced domain,\n");
- fprintf(ofp, " the event will be discarded. Currently,\n");
- fprintf(ofp, " filter is only implemented for the user-space\n");
- fprintf(ofp, " tracer.\n");
- fprintf(ofp, " Expression examples:.\n");
- fprintf(ofp, " \n");
- fprintf(ofp, " 'intfield > 500 && intfield < 503'\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. 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");
-}
-
/*
* Parse probe options.
*/
static int parse_probe_opts(struct lttng_event *ev, char *opt)
{
- int ret;
+ int ret = CMD_SUCCESS;
+ int match;
char s_hex[19];
+#define S_HEX_LEN_SCANF_IS_A_BROKEN_API "18" /* 18 is (19 - 1) (\0 is extra) */
char name[LTTNG_SYMBOL_NAME_LEN];
if (opt == NULL) {
- ret = -1;
+ ret = CMD_ERROR;
goto end;
}
/* Check for symbol+offset */
- ret = sscanf(opt, "%[^'+']+%s", name, s_hex);
- if (ret == 2) {
+ match = sscanf(opt, "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API
+ "[^'+']+%" S_HEX_LEN_SCANF_IS_A_BROKEN_API "s", name, s_hex);
+ if (match == 2) {
strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
DBG("probe symbol %s", ev->attr.probe.symbol_name);
if (*s_hex == '\0') {
ERR("Invalid probe offset %s", s_hex);
- ret = -1;
+ ret = CMD_ERROR;
goto end;
}
ev->attr.probe.offset = strtoul(s_hex, NULL, 0);
/* Check for symbol */
if (isalpha(name[0])) {
- ret = sscanf(opt, "%s", name);
- if (ret == 1) {
+ match = sscanf(opt, "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API "s",
+ name);
+ if (match == 1) {
strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
DBG("probe symbol %s", ev->attr.probe.symbol_name);
}
/* Check for address */
- ret = sscanf(opt, "%s", s_hex);
- if (ret > 0) {
+ match = sscanf(opt, "%" S_HEX_LEN_SCANF_IS_A_BROKEN_API "s", s_hex);
+ if (match > 0) {
if (*s_hex == '\0') {
ERR("Invalid probe address %s", s_hex);
- ret = -1;
+ ret = CMD_ERROR;
goto end;
}
ev->attr.probe.addr = strtoul(s_hex, NULL, 0);
}
/* No match */
- ret = -1;
+ ret = CMD_ERROR;
+
+end:
+ return ret;
+}
+
+/*
+ * Walk the directories in the PATH environment variable to find the target
+ * binary passed as parameter.
+ *
+ * On success, the full path of the binary is copied in binary_full_path out
+ * parameter. This buffer is allocated by the caller and must be at least
+ * LTTNG_PATH_MAX bytes long.
+ * On failure, returns -1;
+ */
+static int walk_command_search_path(const char *binary, char *binary_full_path)
+{
+ char *tentative_binary_path = NULL;
+ char *command_search_path = NULL;
+ char *curr_search_dir_end = NULL;
+ char *curr_search_dir = NULL;
+ struct stat stat_output;
+ int ret = 0;
+
+ command_search_path = lttng_secure_getenv("PATH");
+ if (!command_search_path) {
+ ret = -1;
+ goto end;
+ }
+ /*
+ * Duplicate the $PATH string as the char pointer returned by getenv() should
+ * not be modified.
+ */
+ command_search_path = strdup(command_search_path);
+ if (!command_search_path) {
+ ret = -1;
+ goto end;
+ }
+
+ /*
+ * This char array is used to concatenate path to binary to look for
+ * the binary.
+ */
+ tentative_binary_path = zmalloc(LTTNG_PATH_MAX * sizeof(char));
+ if (!tentative_binary_path) {
+ ret = -1;
+ goto alloc_error;
+ }
+
+ curr_search_dir = command_search_path;
+ do {
+ /*
+ * Split on ':'. The return value of this call points to the
+ * matching character.
+ */
+ curr_search_dir_end = strchr(curr_search_dir, ':');
+ if (curr_search_dir_end != NULL) {
+ /*
+ * Add a NULL byte to the end of the first token so it
+ * can be used as a string.
+ */
+ curr_search_dir_end[0] = '\0';
+ }
+
+ /* Empty the tentative path */
+ memset(tentative_binary_path, 0, LTTNG_PATH_MAX * sizeof(char));
+
+ /*
+ * Build the tentative path to the binary using the current
+ * search directory and the name of the binary.
+ */
+ ret = snprintf(tentative_binary_path, LTTNG_PATH_MAX, "%s/%s",
+ curr_search_dir, binary);
+ if (ret < 0) {
+ goto free_binary_path;
+ }
+ if (ret < LTTNG_PATH_MAX) {
+ /*
+ * Use STAT(2) to see if the file exists.
+ */
+ ret = stat(tentative_binary_path, &stat_output);
+ if (ret == 0) {
+ /*
+ * Verify that it is a regular file or a
+ * symlink and not a special file (e.g.
+ * device).
+ */
+ if (S_ISREG(stat_output.st_mode)
+ || S_ISLNK(stat_output.st_mode)) {
+ /*
+ * Found a match, set the out parameter
+ * and return success.
+ */
+ ret = lttng_strncpy(binary_full_path,
+ tentative_binary_path,
+ LTTNG_PATH_MAX);
+ if (ret == -1) {
+ ERR("Source path does not fit "
+ "in destination buffer.");
+ }
+ goto free_binary_path;
+ }
+ }
+ }
+ /* Go to the next entry in the $PATH variable. */
+ curr_search_dir = curr_search_dir_end + 1;
+ } while (curr_search_dir_end != NULL);
+
+free_binary_path:
+ free(tentative_binary_path);
+alloc_error:
+ free(command_search_path);
end:
return ret;
}
+/*
+ * Parse userspace probe options
+ * Set the userspace probe fields in the lttng_event struct and set the
+ * target_path to the path to the binary.
+ */
+static int parse_userspace_probe_opts(struct lttng_event *ev, char *opt)
+{
+ int ret = CMD_SUCCESS;
+ int num_token;
+ char **tokens;
+ char *target_path = NULL;
+ char *unescaped_target_path = NULL;
+ char *real_target_path = NULL;
+ char *symbol_name = NULL, *probe_name = NULL, *provider_name = NULL;
+ struct lttng_userspace_probe_location *probe_location = NULL;
+ struct lttng_userspace_probe_location_lookup_method *lookup_method =
+ NULL;
+
+ if (opt == NULL) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+
+ /*
+ * userspace probe fields are separated by ':'.
+ */
+ tokens = strutils_split(opt, ':', 1);
+ num_token = strutils_array_of_strings_len(tokens);
+
+ /*
+ * Early sanity check that the number of parameter is between 2 and 4
+ * inclusively.
+ * elf:PATH:SYMBOL
+ * std:PATH:PROVIDER_NAME:PROBE_NAME
+ * PATH:SYMBOL (same behavior as ELF)
+ */
+ if (num_token < 2 || num_token > 4) {
+ ret = CMD_ERROR;
+ goto end_string;
+ }
+
+ /*
+ * Looking up the first parameter will tell the technique to use to
+ * interpret the userspace probe/function description.
+ */
+ switch (num_token) {
+ case 2:
+ /* When the probe type is omitted we assume ELF for now. */
+ case 3:
+ if (num_token == 3 && strcmp(tokens[0], "elf") == 0) {
+ target_path = tokens[1];
+ symbol_name = tokens[2];
+ } else if (num_token == 2) {
+ target_path = tokens[0];
+ symbol_name = tokens[1];
+ } else {
+ ret = CMD_ERROR;
+ goto end_string;
+ }
+ lookup_method =
+ lttng_userspace_probe_location_lookup_method_function_elf_create();
+ if (!lookup_method) {
+ WARN("Failed to create ELF lookup method");
+ ret = CMD_ERROR;
+ goto end_string;
+ }
+ break;
+ case 4:
+ if (strcmp(tokens[0], "sdt") == 0) {
+ target_path = tokens[1];
+ provider_name = tokens[2];
+ probe_name = tokens[3];
+ } else {
+ ret = CMD_ERROR;
+ goto end_string;
+ }
+ lookup_method =
+ lttng_userspace_probe_location_lookup_method_tracepoint_sdt_create();
+ if (!lookup_method) {
+ WARN("Failed to create ELF lookup method");
+ ret = CMD_ERROR;
+ goto end_string;
+ }
+ break;
+ default:
+ ret = CMD_ERROR;
+ goto end_string;
+ }
+
+ /* strutils_unescape_string allocates a new char *. */
+ unescaped_target_path = strutils_unescape_string(target_path, 0);
+ if (!unescaped_target_path) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end_string;
+ }
+
+ /*
+ * If there is not forward slash in the path. Walk the $PATH else
+ * expand.
+ */
+ if (strchr(target_path, '/') == NULL) {
+ /* Walk the $PATH variable to find the targeted binary. */
+ real_target_path = zmalloc(LTTNG_PATH_MAX * sizeof(char));
+ if (!real_target_path) {
+ PERROR("Error allocating path buffer");
+ ret = CMD_ERROR;
+ goto end_unescaped_string;
+ }
+ ret = walk_command_search_path(target_path, real_target_path);
+ if (ret) {
+ ERR("Binary not found.");
+ ret = CMD_ERROR;
+ goto end_free_path;
+ }
+ } else {
+ /*
+ * Expand references to `/./` and `/../`. This function does not check
+ * if the file exists.
+ */
+ real_target_path = utils_expand_path_keep_symlink(target_path);
+ if (!real_target_path) {
+ ERR("Error expanding the path to binary.");
+ ret = CMD_ERROR;
+ goto end_free_path;
+ }
+
+ /*
+ * Check if the file exists using access(2). If it does not, walk the
+ * $PATH.
+ */
+ ret = access(real_target_path, F_OK);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end_free_path;
+ }
+ }
+
+ switch (lttng_userspace_probe_location_lookup_method_get_type(lookup_method)) {
+ case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF:
+ probe_location = lttng_userspace_probe_location_function_create(
+ real_target_path, symbol_name, lookup_method);
+ if (!probe_location) {
+ WARN("Failed to create function probe location");
+ ret = CMD_ERROR;
+ goto end_destroy_lookup_method;
+ }
+
+ /* Ownership transferred to probe_location. */
+ lookup_method = NULL;
+
+ ret = lttng_event_set_userspace_probe_location(ev, probe_location);
+ if (ret) {
+ WARN("Failed to set probe location on event");
+ ret = CMD_ERROR;
+ goto end_destroy_location;
+ }
+ break;
+ case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT:
+ probe_location = lttng_userspace_probe_location_tracepoint_create(
+ real_target_path, provider_name, probe_name, lookup_method);
+ if (!probe_location) {
+ WARN("Failed to create function probe location");
+ ret = CMD_ERROR;
+ goto end_destroy_lookup_method;
+ }
+
+ /* Ownership transferred to probe_location. */
+ lookup_method = NULL;
+
+ ret = lttng_event_set_userspace_probe_location(ev, probe_location);
+ if (ret) {
+ WARN("Failed to set probe location on event");
+ ret = CMD_ERROR;
+ goto end_destroy_location;
+ }
+ break;
+ default:
+ ret = CMD_ERROR;
+ goto end_string;
+ }
+
+ switch (ev->type) {
+ case LTTNG_EVENT_USERSPACE_PROBE:
+ break;
+ default:
+ assert(0);
+ }
+
+ goto end;
+
+end_destroy_location:
+ lttng_userspace_probe_location_destroy(probe_location);
+end_destroy_lookup_method:
+ lttng_userspace_probe_location_lookup_method_destroy(lookup_method);
+end_free_path:
+ /*
+ * Free path that was allocated by the call to realpath() or when walking
+ * the PATH.
+ */
+ free(real_target_path);
+end_unescaped_string:
+ free(unescaped_target_path);
+end_string:
+ strutils_free_null_terminated_array_of_strings(tokens);
+end:
+ return ret;
+}
+
+/*
+ * Maps LOG4j loglevel from string to value
+ */
+static int loglevel_log4j_str_to_value(const char *inputstr)
+{
+ int i = 0;
+ char str[LTTNG_SYMBOL_NAME_LEN];
+
+ if (!inputstr || strlen(inputstr) == 0) {
+ return -1;
+ }
+
+ /*
+ * 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++;
+ }
+ str[i] = '\0';
+
+ if (!strcmp(str, "LOG4J_OFF") || !strcmp(str, "OFF")) {
+ return LTTNG_LOGLEVEL_LOG4J_OFF;
+ } else if (!strcmp(str, "LOG4J_FATAL") || !strcmp(str, "FATAL")) {
+ return LTTNG_LOGLEVEL_LOG4J_FATAL;
+ } else if (!strcmp(str, "LOG4J_ERROR") || !strcmp(str, "ERROR")) {
+ return LTTNG_LOGLEVEL_LOG4J_ERROR;
+ } else if (!strcmp(str, "LOG4J_WARN") || !strcmp(str, "WARN")) {
+ return LTTNG_LOGLEVEL_LOG4J_WARN;
+ } else if (!strcmp(str, "LOG4J_INFO") || !strcmp(str, "INFO")) {
+ return LTTNG_LOGLEVEL_LOG4J_INFO;
+ } else if (!strcmp(str, "LOG4J_DEBUG") || !strcmp(str, "DEBUG")) {
+ return LTTNG_LOGLEVEL_LOG4J_DEBUG;
+ } else if (!strcmp(str, "LOG4J_TRACE") || !strcmp(str, "TRACE")) {
+ return LTTNG_LOGLEVEL_LOG4J_TRACE;
+ } else if (!strcmp(str, "LOG4J_ALL") || !strcmp(str, "ALL")) {
+ return LTTNG_LOGLEVEL_LOG4J_ALL;
+ } else {
+ return -1;
+ }
+}
+
+/*
+ * Maps JUL loglevel from string to value
+ */
+static int loglevel_jul_str_to_value(const char *inputstr)
+{
+ int i = 0;
+ char str[LTTNG_SYMBOL_NAME_LEN];
+
+ if (!inputstr || strlen(inputstr) == 0) {
+ return -1;
+ }
+
+ /*
+ * 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++;
+ }
+ str[i] = '\0';
+
+ if (!strcmp(str, "JUL_OFF") || !strcmp(str, "OFF")) {
+ return LTTNG_LOGLEVEL_JUL_OFF;
+ } else if (!strcmp(str, "JUL_SEVERE") || !strcmp(str, "SEVERE")) {
+ return LTTNG_LOGLEVEL_JUL_SEVERE;
+ } else if (!strcmp(str, "JUL_WARNING") || !strcmp(str, "WARNING")) {
+ return LTTNG_LOGLEVEL_JUL_WARNING;
+ } else if (!strcmp(str, "JUL_INFO") || !strcmp(str, "INFO")) {
+ return LTTNG_LOGLEVEL_JUL_INFO;
+ } else if (!strcmp(str, "JUL_CONFIG") || !strcmp(str, "CONFIG")) {
+ return LTTNG_LOGLEVEL_JUL_CONFIG;
+ } else if (!strcmp(str, "JUL_FINE") || !strcmp(str, "FINE")) {
+ return LTTNG_LOGLEVEL_JUL_FINE;
+ } else if (!strcmp(str, "JUL_FINER") || !strcmp(str, "FINER")) {
+ return LTTNG_LOGLEVEL_JUL_FINER;
+ } else if (!strcmp(str, "JUL_FINEST") || !strcmp(str, "FINEST")) {
+ return LTTNG_LOGLEVEL_JUL_FINEST;
+ } else if (!strcmp(str, "JUL_ALL") || !strcmp(str, "ALL")) {
+ return LTTNG_LOGLEVEL_JUL_ALL;
+ } else {
+ return -1;
+ }
+}
+
+/*
+ * Maps Python loglevel from string to value
+ */
+static int loglevel_python_str_to_value(const char *inputstr)
+{
+ int i = 0;
+ char str[LTTNG_SYMBOL_NAME_LEN];
+
+ if (!inputstr || strlen(inputstr) == 0) {
+ return -1;
+ }
+
+ /*
+ * 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++;
+ }
+ str[i] = '\0';
+
+ if (!strcmp(str, "PYTHON_CRITICAL") || !strcmp(str, "CRITICAL")) {
+ return LTTNG_LOGLEVEL_PYTHON_CRITICAL;
+ } else if (!strcmp(str, "PYTHON_ERROR") || !strcmp(str, "ERROR")) {
+ return LTTNG_LOGLEVEL_PYTHON_ERROR;
+ } else if (!strcmp(str, "PYTHON_WARNING") || !strcmp(str, "WARNING")) {
+ return LTTNG_LOGLEVEL_PYTHON_WARNING;
+ } else if (!strcmp(str, "PYTHON_INFO") || !strcmp(str, "INFO")) {
+ return LTTNG_LOGLEVEL_PYTHON_INFO;
+ } else if (!strcmp(str, "PYTNON_DEBUG") || !strcmp(str, "DEBUG")) {
+ return LTTNG_LOGLEVEL_PYTHON_DEBUG;
+ } else if (!strcmp(str, "PYTHON_NOTSET") || !strcmp(str, "NOTSET")) {
+ return LTTNG_LOGLEVEL_PYTHON_NOTSET;
+ } else {
+ return -1;
+ }
+}
+
/*
* Maps loglevel from string to value
*/
int i = 0;
char str[LTTNG_SYMBOL_NAME_LEN];
+ if (!inputstr || strlen(inputstr) == 0) {
+ return -1;
+ }
+
/*
* 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.
}
}
+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 ? : "<default>";
+}
+
+/*
+ * Mi print exlcusion list
+ */
+static
+int mi_print_exclusion(char **names)
+{
+ int i, ret;
+ int count = names ? strutils_array_of_strings_len(names) : 0;
+
+ assert(writer);
+
+ if (count == 0) {
+ ret = 0;
+ goto end;
+ }
+ ret = mi_lttng_writer_open_element(writer, config_element_exclusions);
+ if (ret) {
+ goto end;
+ }
+
+ for (i = 0; i < count; i++) {
+ ret = mi_lttng_writer_write_element_string(writer,
+ config_element_exclusion, names[i]);
+ if (ret) {
+ goto end;
+ }
+ }
+
+ /* Close exclusions element */
+ ret = mi_lttng_writer_close_element(writer);
+
+end:
+ return ret;
+}
+
+/*
+ * Return allocated string for pretty-printing exclusion names.
+ */
+static
+char *print_exclusions(char **names)
+{
+ int length = 0;
+ int i;
+ const char *preamble = " excluding ";
+ char *ret;
+ int count = names ? strutils_array_of_strings_len(names) : 0;
+
+ if (count == 0) {
+ return strdup("");
+ }
+
+ /* calculate total required length */
+ for (i = 0; i < count; i++) {
+ length += strlen(names[i]) + 4;
+ }
+
+ /* add length of preamble + one for NUL - one for last (missing) comma */
+ length += strlen(preamble);
+ ret = zmalloc(length + 1);
+ if (!ret) {
+ return NULL;
+ }
+ strncpy(ret, preamble, length);
+ for (i = 0; i < count; i++) {
+ strcat(ret, "\"");
+ strcat(ret, names[i]);
+ strcat(ret, "\"");
+ if (i != count - 1) {
+ strcat(ret, ", ");
+ }
+ }
+
+ return ret;
+}
+
+static
+int check_exclusion_subsets(const char *event_name, const char *exclusion)
+{
+ bool warn = false;
+ int ret = 0;
+ const char *e = event_name;
+ const char *x = exclusion;
+
+ /* Scan both the excluder and the event letter by letter */
+ while (true) {
+ if (*e == '\\') {
+ if (*x != *e) {
+ warn = true;
+ goto end;
+ }
+
+ e++;
+ x++;
+ goto cmp_chars;
+ }
+
+ if (*x == '*') {
+ /* Event is a subset of the excluder */
+ ERR("Event %s: %s excludes all events from %s",
+ event_name, exclusion, event_name);
+ goto error;
+ }
+
+ if (*e == '*') {
+ /*
+ * Reached the end of the event name before the
+ * end of the exclusion: this is valid.
+ */
+ goto end;
+ }
+
+cmp_chars:
+ if (*x != *e) {
+ warn = true;
+ break;
+ }
+
+ x++;
+ e++;
+ }
+
+ goto end;
+
+error:
+ ret = -1;
+
+end:
+ if (warn) {
+ WARN("Event %s: %s does not exclude any events from %s",
+ event_name, exclusion, event_name);
+ }
+
+ return ret;
+}
+
+static
+int create_exclusion_list_and_validate(const char *event_name,
+ const char *exclusions_arg,
+ char ***exclusion_list)
+{
+ int ret = 0;
+ char **exclusions = NULL;
+
+ /* Event name must be a valid globbing pattern to allow exclusions. */
+ if (!strutils_is_star_glob_pattern(event_name)) {
+ ERR("Event %s: Exclusions can only be used with a globbing pattern",
+ event_name);
+ goto error;
+ }
+
+ /* Split exclusions. */
+ exclusions = strutils_split(exclusions_arg, ',', true);
+ if (!exclusions) {
+ goto error;
+ }
+
+ /*
+ * If the event name is a star-at-end only globbing pattern,
+ * then we can validate the individual exclusions. Otherwise
+ * all exclusions are passed to the session daemon.
+ */
+ if (strutils_is_star_at_the_end_only_glob_pattern(event_name)) {
+ char * const *exclusion;
+
+ for (exclusion = exclusions; *exclusion; exclusion++) {
+ if (!strutils_is_star_glob_pattern(*exclusion) ||
+ strutils_is_star_at_the_end_only_glob_pattern(*exclusion)) {
+ ret = check_exclusion_subsets(event_name, *exclusion);
+ if (ret) {
+ goto error;
+ }
+ }
+ }
+ }
+
+ *exclusion_list = exclusions;
+
+ goto end;
+
+error:
+ ret = -1;
+ strutils_free_null_terminated_array_of_strings(exclusions);
+
+end:
+ return ret;
+}
+
+static void warn_on_truncated_exclusion_names(char * const *exclusion_list,
+ int *warn)
+{
+ char * const *exclusion;
+
+ for (exclusion = exclusion_list; *exclusion; exclusion++) {
+ if (strlen(*exclusion) >= LTTNG_SYMBOL_NAME_LEN) {
+ WARN("Event exclusion \"%s\" will be truncated",
+ *exclusion);
+ *warn = 1;
+ }
+ }
+}
+
/*
* Enabling event using the lttng API.
+ * Note: in case of error only the last error code will be return.
*/
static int enable_events(char *session_name)
{
- int err, ret = CMD_SUCCESS, warn = 0;
+ int ret = CMD_SUCCESS, command_ret = CMD_SUCCESS;
+ int error_holder = CMD_SUCCESS, warn = 0, error = 0, success = 1;
char *event_name, *channel_name = NULL;
- struct lttng_event ev;
+ struct lttng_event *ev;
struct lttng_domain dom;
+ char **exclusion_list = NULL;
- memset(&ev, 0, sizeof(ev));
memset(&dom, 0, sizeof(dom));
+ ev = lttng_event_create();
+ if (!ev) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+
if (opt_kernel) {
- if (opt_filter) {
- ERR("Filter not implement for kernel tracing yet");
- ret = CMD_ERROR;
- goto error;
+ if (opt_loglevel) {
+ WARN("Kernel loglevels are not supported.");
}
}
dom.type = LTTNG_DOMAIN_UST;
/* Default. */
dom.buf_type = LTTNG_BUFFER_PER_UID;
+ } else if (opt_jul) {
+ dom.type = LTTNG_DOMAIN_JUL;
+ /* Default. */
+ dom.buf_type = LTTNG_BUFFER_PER_UID;
+ } else if (opt_log4j) {
+ dom.type = LTTNG_DOMAIN_LOG4J;
+ /* Default. */
+ dom.buf_type = LTTNG_BUFFER_PER_UID;
+ } else if (opt_python) {
+ dom.type = LTTNG_DOMAIN_PYTHON;
+ /* Default. */
+ dom.buf_type = LTTNG_BUFFER_PER_UID;
} else {
- ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
- ret = CMD_ERROR;
- goto error;
+ /* Checked by the caller. */
+ assert(0);
}
- if (opt_channel_name == NULL) {
- err = asprintf(&channel_name, DEFAULT_CHANNEL_NAME);
- if (err < 0) {
- ret = CMD_FATAL;
+ if (opt_exclude) {
+ switch (dom.type) {
+ case LTTNG_DOMAIN_KERNEL:
+ case LTTNG_DOMAIN_JUL:
+ case LTTNG_DOMAIN_LOG4J:
+ case LTTNG_DOMAIN_PYTHON:
+ ERR("Event name exclusions are not yet implemented for %s events",
+ get_domain_str(dom.type));
+ ret = CMD_ERROR;
goto error;
+ case LTTNG_DOMAIN_UST:
+ /* Exclusions supported */
+ break;
+ default:
+ assert(0);
}
- } else {
- channel_name = opt_channel_name;
}
+ channel_name = opt_channel_name;
+
handle = lttng_create_handle(session_name, &dom);
if (handle == NULL) {
ret = -1;
goto error;
}
+ /* Prepare Mi */
+ if (lttng_opt_mi) {
+ /* Open a events element */
+ ret = mi_lttng_writer_open_element(writer, config_element_events);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+ }
+
if (opt_enable_all) {
/* Default setup for enable all */
if (opt_kernel) {
- ev.type = opt_event_type;
- ev.name[0] = '\0';
+ ev->type = opt_event_type;
+ strcpy(ev->name, "*");
/* kernel loglevels not implemented */
- ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
+ ev->loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
} else {
- ev.type = LTTNG_EVENT_TRACEPOINT;
- strcpy(ev.name, "*");
- ev.loglevel_type = opt_loglevel_type;
+ ev->type = LTTNG_EVENT_TRACEPOINT;
+ strcpy(ev->name, "*");
+ ev->loglevel_type = opt_loglevel_type;
if (opt_loglevel) {
- ev.loglevel = loglevel_str_to_value(opt_loglevel);
- if (ev.loglevel == -1) {
+ assert(opt_userspace || opt_jul || opt_log4j || opt_python);
+ if (opt_userspace) {
+ ev->loglevel = loglevel_str_to_value(opt_loglevel);
+ } else if (opt_jul) {
+ ev->loglevel = loglevel_jul_str_to_value(opt_loglevel);
+ } else if (opt_log4j) {
+ ev->loglevel = loglevel_log4j_str_to_value(opt_loglevel);
+ } else if (opt_python) {
+ ev->loglevel = loglevel_python_str_to_value(opt_loglevel);
+ }
+ if (ev->loglevel == -1) {
ERR("Unknown loglevel %s", opt_loglevel);
ret = -LTTNG_ERR_INVALID;
goto error;
}
} else {
- ev.loglevel = -1;
+ assert(opt_userspace || opt_jul || opt_log4j || opt_python);
+ if (opt_userspace) {
+ ev->loglevel = -1;
+ } else if (opt_jul) {
+ ev->loglevel = LTTNG_LOGLEVEL_JUL_ALL;
+ } else if (opt_log4j) {
+ ev->loglevel = LTTNG_LOGLEVEL_LOG4J_ALL;
+ } else if (opt_python) {
+ ev->loglevel = LTTNG_LOGLEVEL_PYTHON_DEBUG;
+ }
}
}
+ if (opt_exclude) {
+ ret = create_exclusion_list_and_validate("*",
+ opt_exclude, &exclusion_list);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ ev->exclusion = 1;
+ warn_on_truncated_exclusion_names(exclusion_list,
+ &warn);
+ }
if (!opt_filter) {
- ret = lttng_enable_event(handle, &ev, channel_name);
+ ret = lttng_enable_event_with_exclusions(handle,
+ ev, channel_name,
+ NULL,
+ exclusion_list ? strutils_array_of_strings_len(exclusion_list) : 0,
+ exclusion_list);
if (ret < 0) {
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);
+ warn = 1;
+ break;
+ case LTTNG_ERR_TRACE_ALREADY_STARTED:
+ {
+ const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
+ ERR("Events: %s (channel %s, session %s)",
+ msg,
+ print_channel_name(channel_name),
+ session_name);
+ error = 1;
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);
+ error = 1;
break;
}
goto end;
switch (opt_event_type) {
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,
+ if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
+ char *exclusion_string = print_exclusions(exclusion_list);
+
+ if (!exclusion_string) {
+ PERROR("Cannot allocate exclusion_string");
+ error = 1;
+ goto end;
+ }
+ MSG("All %s tracepoints%s are enabled in channel %s for loglevel %s",
+ get_domain_str(dom.type),
+ exclusion_string,
+ print_channel_name(channel_name),
opt_loglevel);
+ free(exclusion_string);
} else {
- MSG("All %s tracepoints are enabled in channel %s",
- opt_kernel ? "kernel" : "UST", channel_name);
+ char *exclusion_string = print_exclusions(exclusion_list);
+ if (!exclusion_string) {
+ PERROR("Cannot allocate exclusion_string");
+ error = 1;
+ goto end;
+ }
+ MSG("All %s tracepoints%s are enabled in channel %s",
+ get_domain_str(dom.type),
+ exclusion_string,
+ print_channel_name(channel_name));
+ free(exclusion_string);
}
break;
case LTTNG_EVENT_SYSCALL:
if (opt_kernel) {
- MSG("All kernel system calls are enabled in channel %s",
- channel_name);
+ MSG("All %s system calls are enabled in channel %s",
+ get_domain_str(dom.type),
+ 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,
+ if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
+ char *exclusion_string = print_exclusions(exclusion_list);
+
+ if (!exclusion_string) {
+ PERROR("Cannot allocate exclusion_string");
+ error = 1;
+ goto end;
+ }
+ MSG("All %s events%s are enabled in channel %s for loglevel %s",
+ get_domain_str(dom.type),
+ exclusion_string,
+ print_channel_name(channel_name),
opt_loglevel);
+ free(exclusion_string);
} else {
- MSG("All %s events are enabled in channel %s",
- opt_kernel ? "kernel" : "UST", channel_name);
+ char *exclusion_string = print_exclusions(exclusion_list);
+
+ if (!exclusion_string) {
+ PERROR("Cannot allocate exclusion_string");
+ error = 1;
+ goto end;
+ }
+ MSG("All %s events%s are enabled in channel %s",
+ get_domain_str(dom.type),
+ exclusion_string,
+ print_channel_name(channel_name));
+ free(exclusion_string);
}
break;
default:
goto error;
}
}
+
if (opt_filter) {
- ret = lttng_enable_event_with_filter(handle, &ev, channel_name,
- opt_filter);
- if (ret < 0) {
- switch (-ret) {
+ command_ret = lttng_enable_event_with_exclusions(handle, ev, channel_name,
+ opt_filter,
+ exclusion_list ? strutils_array_of_strings_len(exclusion_list) : 0,
+ exclusion_list);
+ if (command_ret < 0) {
+ switch (-command_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);
+ warn = 1;
+ break;
+ case LTTNG_ERR_TRACE_ALREADY_STARTED:
+ {
+ const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
+ ERR("All events: %s (channel %s, session %s, filter \'%s\')",
+ msg,
+ print_channel_name(channel_name),
+ session_name, opt_filter);
+ error = 1;
break;
- case LTTNG_ERR_FILTER_INVAL:
- case LTTNG_ERR_FILTER_NOMEM:
+ }
default:
- ERR("%s", lttng_strerror(ret));
+ ERR("All events: %s (channel %s, session %s, filter \'%s\')",
+ lttng_strerror(command_ret),
+ command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
+ ? print_raw_channel_name(channel_name)
+ : print_channel_name(channel_name),
+ session_name, opt_filter);
+ error = 1;
break;
}
- goto error;
+ error_holder = command_ret;
} else {
+ ev->filter = 1;
MSG("Filter '%s' successfully set", opt_filter);
}
}
+
+ if (lttng_opt_mi) {
+ /* The wildcard * is used for kernel and ust domain to
+ * represent ALL. We copy * in event name to force the wildcard use
+ * for kernel domain
+ *
+ * Note: this is strictly for semantic and printing while in
+ * machine interface mode.
+ */
+ strcpy(ev->name, "*");
+
+ /* If we reach here the events are enabled */
+ if (!error && !warn) {
+ ev->enabled = 1;
+ } else {
+ ev->enabled = 0;
+ success = 0;
+ }
+ ret = mi_lttng_event(writer, ev, 1, handle->domain.type);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ /* print exclusion */
+ ret = mi_print_exclusion(exclusion_list);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ /* Success ? */
+ ret = mi_lttng_writer_write_element_bool(writer,
+ mi_lttng_element_command_success, success);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ /* Close event element */
+ ret = mi_lttng_writer_close_element(writer);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+ }
+
goto end;
}
event_name = strtok(opt_event_list, ",");
while (event_name != NULL) {
/* Copy name and type of the event */
- strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
- ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
- ev.type = opt_event_type;
+ strncpy(ev->name, event_name, LTTNG_SYMBOL_NAME_LEN);
+ ev->name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
+ ev->type = opt_event_type;
/* 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 */
- ev.type = LTTNG_EVENT_TRACEPOINT;
- /* Fall-through */
+ case LTTNG_EVENT_ALL: /* Enable tracepoints and syscalls */
+ /* If event name differs from *, select tracepoint. */
+ if (strcmp(ev->name, "*")) {
+ ev->type = LTTNG_EVENT_TRACEPOINT;
+ }
+ break;
case LTTNG_EVENT_TRACEPOINT:
break;
case LTTNG_EVENT_PROBE:
- ret = parse_probe_opts(&ev, opt_probe);
- if (ret < 0) {
+ ret = parse_probe_opts(ev, opt_probe);
+ if (ret) {
ERR("Unable to parse probe options");
- ret = 0;
+ ret = CMD_ERROR;
+ goto error;
+ }
+ break;
+ case LTTNG_EVENT_USERSPACE_PROBE:
+ ret = parse_userspace_probe_opts(ev, opt_userspace_probe);
+ if (ret) {
+ ERR("Unable to parse userspace probe options");
+ ret = CMD_ERROR;
goto error;
}
break;
case LTTNG_EVENT_FUNCTION:
- ret = parse_probe_opts(&ev, opt_function);
- if (ret < 0) {
+ ret = parse_probe_opts(ev, opt_function);
+ if (ret) {
ERR("Unable to parse function probe options");
- ret = 0;
+ ret = CMD_ERROR;
goto error;
}
break;
- case LTTNG_EVENT_FUNCTION_ENTRY:
- strncpy(ev.attr.ftrace.symbol_name, opt_function_entry_symbol,
- LTTNG_SYMBOL_NAME_LEN);
- ev.attr.ftrace.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
- break;
case LTTNG_EVENT_SYSCALL:
- MSG("per-syscall selection not supported yet. Use \"-a\" "
- "for all syscalls.");
+ ev->type = LTTNG_EVENT_SYSCALL;
+ break;
default:
ret = CMD_UNDEFINED;
goto error;
}
- if (opt_loglevel) {
- MSG("Kernel loglevels are not supported.");
- ret = CMD_UNSUPPORTED;
- goto error;
- }
-
/* kernel loglevels not implemented */
- ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
+ ev->loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
} else if (opt_userspace) { /* User-space tracer action */
-#if 0
- if (opt_cmd_name != NULL || opt_pid) {
- MSG("Only supporting tracing all UST processes (-u) for now.");
- ret = CMD_UNDEFINED;
- goto error;
- }
-#endif
-
DBG("Enabling UST event %s for channel %s, loglevel %s", event_name,
-
channel_name, opt_loglevel ? : "<all>");
+
print_channel_name(channel_name), opt_loglevel ? : "<all>");
switch (opt_event_type) {
case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
/* Fall-through */
case LTTNG_EVENT_TRACEPOINT:
/* Copy name and type of the event */
- ev.type = LTTNG_EVENT_TRACEPOINT;
- strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
- ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
+ ev->type = LTTNG_EVENT_TRACEPOINT;
+ strncpy(ev->name, event_name, LTTNG_SYMBOL_NAME_LEN);
+ ev->name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
break;
case LTTNG_EVENT_PROBE:
case LTTNG_EVENT_FUNCTION:
- case LTTNG_EVENT_FUNCTION_ENTRY:
case LTTNG_EVENT_SYSCALL:
+ case LTTNG_EVENT_USERSPACE_PROBE:
default:
ERR("Event type not available for user-space tracing");
ret = CMD_UNSUPPORTED;
goto error;
}
- ev.loglevel_type = opt_loglevel_type;
+ if (opt_exclude) {
+ ev->exclusion = 1;
+ if (opt_event_type != LTTNG_EVENT_ALL && opt_event_type != LTTNG_EVENT_TRACEPOINT) {
+ ERR("Exclusion option can only be used with tracepoint events");
+ ret = CMD_ERROR;
+ goto error;
+ }
+ /* Free previously allocated items */
+ strutils_free_null_terminated_array_of_strings(
+ exclusion_list);
+ exclusion_list = NULL;
+ ret = create_exclusion_list_and_validate(
+ event_name, opt_exclude,
+ &exclusion_list);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ warn_on_truncated_exclusion_names(
+ exclusion_list, &warn);
+ }
+
+ ev->loglevel_type = opt_loglevel_type;
+ if (opt_loglevel) {
+ ev->loglevel = loglevel_str_to_value(opt_loglevel);
+ if (ev->loglevel == -1) {
+ ERR("Unknown loglevel %s", opt_loglevel);
+ ret = -LTTNG_ERR_INVALID;
+ goto error;
+ }
+ } else {
+ ev->loglevel = -1;
+ }
+ } else if (opt_jul || opt_log4j || opt_python) {
+ if (opt_event_type != LTTNG_EVENT_ALL &&
+ opt_event_type != LTTNG_EVENT_TRACEPOINT) {
+ ERR("Event type not supported for domain.");
+ ret = CMD_UNSUPPORTED;
+ goto error;
+ }
+
+ ev->loglevel_type = opt_loglevel_type;
if (opt_loglevel) {
- ev.loglevel = loglevel_str_to_value(opt_loglevel);
- if (ev.loglevel == -1) {
+ if (opt_jul) {
+ ev->loglevel = loglevel_jul_str_to_value(opt_loglevel);
+ } else if (opt_log4j) {
+ ev->loglevel = loglevel_log4j_str_to_value(opt_loglevel);
+ } else if (opt_python) {
+ ev->loglevel = loglevel_python_str_to_value(opt_loglevel);
+ }
+ if (ev->loglevel == -1) {
ERR("Unknown loglevel %s", opt_loglevel);
ret = -LTTNG_ERR_INVALID;
goto error;
}
} else {
- ev.loglevel = -1;
+ if (opt_jul) {
+ ev->loglevel = LTTNG_LOGLEVEL_JUL_ALL;
+ } else if (opt_log4j) {
+ ev->loglevel = LTTNG_LOGLEVEL_LOG4J_ALL;
+ } else if (opt_python) {
+ ev->loglevel = LTTNG_LOGLEVEL_PYTHON_DEBUG;
+ }
}
+ ev->type = LTTNG_EVENT_TRACEPOINT;
+ strncpy(ev->name, event_name, LTTNG_SYMBOL_NAME_LEN);
+ ev->name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
} else {
- ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
- ret = CMD_ERROR;
- goto error;
+ assert(0);
}
if (!opt_filter) {
- ret = lttng_enable_event(handle, &ev, channel_name);
- if (ret < 0) {
+ char *exclusion_string;
+
+ command_ret = lttng_enable_event_with_exclusions(handle,
+ ev, channel_name,
+ NULL,
+ exclusion_list ? strutils_array_of_strings_len(exclusion_list) : 0,
+ exclusion_list);
+ exclusion_string = print_exclusions(exclusion_list);
+ if (!exclusion_string) {
+ PERROR("Cannot allocate exclusion_string");
+ error = 1;
+ goto end;
+ }
+ if (command_ret < 0) {
/* Turn ret to positive value to handle the positive error code */
- switch (-ret) {
+ switch (-command_ret) {
case LTTNG_ERR_KERN_EVENT_EXIST:
- WARN("Kernel event %s already enabled (channel %s, session %s)",
- event_name, channel_name, session_name);
+ WARN("Kernel event %s%s already enabled (channel %s, session %s)",
+ event_name,
+ exclusion_string,
+ print_channel_name(channel_name), session_name);
+ warn = 1;
+ break;
+ case LTTNG_ERR_TRACE_ALREADY_STARTED:
+ {
+ const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
+ ERR("Event %s%s: %s (channel %s, session %s)", event_name,
+ exclusion_string,
+ msg,
+ print_channel_name(channel_name),
+ session_name);
+ error = 1;
+ break;
+ }
+ case LTTNG_ERR_SDT_PROBE_SEMAPHORE:
+ ERR("SDT probes %s guarded by semaphores are not supported (channel %s, session %s)",
+ event_name, print_channel_name(channel_name),
+ session_name);
+ error = 1;
break;
default:
- ERR("Event %s: %s (channel %s, session %s)", event_name,
- lttng_strerror(ret), channel_name, session_name);
+ ERR("Event %s%s: %s (channel %s, session %s)", event_name,
+ exclusion_string,
+ lttng_strerror(command_ret),
+ command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
+ ? print_raw_channel_name(channel_name)
+ : print_channel_name(channel_name),
+ session_name);
+ error = 1;
break;
}
- warn = 1;
+ error_holder = command_ret;
} else {
- MSG("%s event %s created in channel %s",
- opt_kernel ? "kernel": "UST", event_name, channel_name);
+ switch (dom.type) {
+ case LTTNG_DOMAIN_KERNEL:
+ case LTTNG_DOMAIN_UST:
+ MSG("%s event %s%s created in channel %s",
+ get_domain_str(dom.type),
+ event_name,
+ exclusion_string,
+ print_channel_name(channel_name));
+ break;
+ case LTTNG_DOMAIN_JUL:
+ case LTTNG_DOMAIN_LOG4J:
+ case LTTNG_DOMAIN_PYTHON:
+ /*
+ * Don't print the default channel
+ * name for agent domains.
+ */
+ MSG("%s event %s%s enabled",
+ get_domain_str(dom.type),
+ event_name,
+ exclusion_string);
+ break;
+ default:
+ assert(0);
+ }
}
+ free(exclusion_string);
}
if (opt_filter) {
- ret = lttng_enable_event_with_filter(handle, &ev, channel_name,
- opt_filter);
- if (ret < 0) {
- switch (-ret) {
+ char *exclusion_string;
+
+ /* Filter present */
+ ev->filter = 1;
+
+ command_ret = lttng_enable_event_with_exclusions(handle, ev, channel_name,
+ opt_filter,
+ exclusion_list ? strutils_array_of_strings_len(exclusion_list) : 0,
+ exclusion_list);
+ exclusion_string = print_exclusions(exclusion_list);
+ if (!exclusion_string) {
+ PERROR("Cannot allocate exclusion_string");
+ error = 1;
+ goto end;
+ }
+ if (command_ret < 0) {
+ switch (-command_ret) {
case LTTNG_ERR_FILTER_EXIST:
- WARN("Filter on event %s is already enabled"
+ WARN("Filter on event %s%s is already enabled"
" (channel %s, session %s)",
- event_name, channel_name, session_name);
+ event_name,
+ exclusion_string,
+ print_channel_name(channel_name), session_name);
+ warn = 1;
+ break;
+ case LTTNG_ERR_TRACE_ALREADY_STARTED:
+ {
+ const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
+ ERR("Event %s%s: %s (channel %s, session %s, filter \'%s\')", ev->name,
+ exclusion_string,
+ msg,
+ print_channel_name(channel_name),
+ session_name, opt_filter);
+ error = 1;
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: %s (channel %s, session %s, filter \'%s\')", ev->name,
+ exclusion_string,
+ lttng_strerror(command_ret),
+ command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
+ ? print_raw_channel_name(channel_name)
+ : print_channel_name(channel_name),
+ session_name, opt_filter);
+ error = 1;
break;
}
- goto error;
+ error_holder = command_ret;
+
} else {
- MSG("Filter '%s' successfully set", opt_filter);
+ MSG("Event %s%s: Filter '%s' successfully set",
+ event_name, exclusion_string,
+ opt_filter);
+ }
+ free(exclusion_string);
+ }
+
+ if (lttng_opt_mi) {
+ if (command_ret) {
+ success = 0;
+ ev->enabled = 0;
+ } else {
+ ev->enabled = 1;
+ }
+
+ ret = mi_lttng_event(writer, ev, 1, handle->domain.type);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ /* print exclusion */
+ ret = mi_print_exclusion(exclusion_list);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ /* Success ? */
+ ret = mi_lttng_writer_write_element_bool(writer,
+ mi_lttng_element_command_success, success);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+
+ /* Close event element */
+ ret = mi_lttng_writer_close_element(writer);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
}
}
/* Next event */
event_name = strtok(NULL, ",");
+ /* Reset warn, error and success */
+ success = 1;
}
end:
+ /* Close Mi */
+ if (lttng_opt_mi) {
+ /* Close events element */
+ ret = mi_lttng_writer_close_element(writer);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+ }
error:
if (warn) {
ret = CMD_WARNING;
}
- if (opt_channel_name == NULL) {
- free(channel_name);
+ if (error) {
+ ret = CMD_ERROR;
}
lttng_destroy_handle(handle);
+ strutils_free_null_terminated_array_of_strings(exclusion_list);
+
+ /* Overwrite ret with error_holder if there was an actual error with
+ * enabling an event.
+ */
+ ret = error_holder ? error_holder : ret;
+ lttng_event_destroy(ev);
return ret;
}
*/
int cmd_enable_events(int argc, const char **argv)
{
- int opt, ret = CMD_SUCCESS;
+ int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
static poptContext pc;
char *session_name = NULL;
+ const char *leftover = NULL;
int event_type = -1;
pc = poptGetContext(NULL, argc, argv, long_options, 0);
while ((opt = poptGetNextOpt(pc)) != -1) {
switch (opt) {
case OPT_HELP:
- usage(stdout);
+ SHOW_HELP();
goto end;
case OPT_TRACEPOINT:
opt_event_type = LTTNG_EVENT_TRACEPOINT;
case OPT_PROBE:
opt_event_type = LTTNG_EVENT_PROBE;
break;
+ case OPT_USERSPACE_PROBE:
+ opt_event_type = LTTNG_EVENT_USERSPACE_PROBE;
+ break;
case OPT_FUNCTION:
opt_event_type = LTTNG_EVENT_FUNCTION;
break;
- case OPT_FUNCTION_ENTRY:
- opt_event_type = LTTNG_EVENT_FUNCTION_ENTRY;
- break;
case OPT_SYSCALL:
opt_event_type = LTTNG_EVENT_SYSCALL;
break;
goto end;
case OPT_FILTER:
break;
+ case OPT_EXCLUDE:
+ break;
default:
- usage(stderr);
ret = CMD_UNDEFINED;
goto end;
}
}
}
+ ret = print_missing_or_multiple_domains(
+ opt_kernel + opt_userspace + opt_jul + opt_log4j + opt_python);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+
+ /* Mi check */
+ if (lttng_opt_mi) {
+ writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
+ if (!writer) {
+ ret = -LTTNG_ERR_NOMEM;
+ goto end;
+ }
+
+ /* Open command element */
+ ret = mi_lttng_writer_command_open(writer,
+ mi_lttng_element_command_enable_event);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+
+ /* Open output element */
+ ret = mi_lttng_writer_open_element(writer,
+ mi_lttng_element_command_output);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+ }
+
opt_event_list = (char*) poptGetArg(pc);
if (opt_event_list == NULL && opt_enable_all == 0) {
ERR("Missing event name(s).\n");
- usage(stderr);
+ ret = CMD_ERROR;
+ goto end;
+ }
+
+ leftover = poptGetArg(pc);
+ if (leftover) {
+ ERR("Unknown argument: %s", leftover);
ret = CMD_ERROR;
goto end;
}
if (!opt_session_name) {
session_name = get_session_name();
if (session_name == NULL) {
- ret = CMD_ERROR;
- goto end;
+ command_ret = CMD_ERROR;
+ success = 0;
+ goto mi_closing;
}
} else {
session_name = opt_session_name;
}
- ret = enable_events(session_name);
+ command_ret = enable_events(session_name);
+ if (command_ret) {
+ success = 0;
+ goto mi_closing;
+ }
+
+mi_closing:
+ /* Mi closing */
+ if (lttng_opt_mi) {
+ /* Close output element */
+ ret = mi_lttng_writer_close_element(writer);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+
+ ret = mi_lttng_writer_write_element_bool(writer,
+ mi_lttng_element_command_success, success);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+
+ /* Command element close */
+ ret = mi_lttng_writer_command_close(writer);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+ }
end:
+ /* Mi clean-up */
+ if (writer && mi_lttng_writer_destroy(writer)) {
+ /* Preserve original error code */
+ ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL;
+ }
+
if (opt_session_name == NULL) {
free(session_name);
}
+ /* Overwrite ret if an error occurred in enable_events */
+ ret = command_ret ? command_ret : ret;
+
poptFreeContext(pc);
return ret;
}
+
projects / lttng-tools.git / blobdiff