* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#define _GNU_SOURCE
+#define _LGPL_SOURCE
#include <assert.h>
#include <grp.h>
#include <errno.h>
*/
int lttng_opt_quiet;
int lttng_opt_verbose;
+int lttng_opt_mi;
/*
* Copy string from src to dst and enforce null terminated byte.
case LTTNG_DOMAIN_KERNEL:
case LTTNG_DOMAIN_UST:
case LTTNG_DOMAIN_JUL:
+ case LTTNG_DOMAIN_LOG4J:
+ case LTTNG_DOMAIN_PYTHON:
memcpy(dst, src, sizeof(struct lttng_domain));
break;
default:
/* Get number of supplementary group IDs */
grp_list_size = getgroups(0, NULL);
if (grp_list_size < 0) {
- perror("getgroups");
+ PERROR("getgroups");
goto end;
}
/* Alloc group list of the right size */
- grp_list = malloc(grp_list_size * sizeof(gid_t));
+ grp_list = zmalloc(grp_list_size * sizeof(gid_t));
if (!grp_list) {
- perror("malloc");
+ PERROR("malloc");
goto end;
}
grp_id = getgroups(grp_list_size, grp_list);
if (grp_id < 0) {
- perror("getgroups");
+ PERROR("getgroups");
goto free_list;
}
ret = lttcomm_close_unix_sock(ret);
if (ret < 0) {
- perror("lttcomm_close_unix_sock");
+ PERROR("lttcomm_close_unix_sock");
}
return 0;
goto end;
}
- data = (void*) malloc(size);
+ data = zmalloc(size);
+ if (!data) {
+ ret = -ENOMEM;
+ goto end;
+ }
/* Get payload data */
ret = recv_data_sessiond(data, size);
goto end;
}
- handle = malloc(sizeof(struct lttng_handle));
+ handle = zmalloc(sizeof(struct lttng_handle));
if (handle == NULL) {
PERROR("malloc handle");
goto end;
return -LTTNG_ERR_INVALID;
}
+ memset(&lsm, 0, sizeof(lsm));
lsm.cmd_type = LTTNG_REGISTER_CONSUMER;
lttng_ctl_copy_string(lsm.session.name, handle->session_name,
sizeof(lsm.session.name));
return -LTTNG_ERR_INVALID;
}
+ memset(&lsm, 0, sizeof(lsm));
lsm.cmd_type = LTTNG_START_TRACE;
lttng_ctl_copy_string(lsm.session.name, session_name,
return -LTTNG_ERR_INVALID;
}
+ memset(&lsm, 0, sizeof(lsm));
lsm.cmd_type = LTTNG_STOP_TRACE;
lttng_ctl_copy_string(lsm.session.name, session_name,
goto end;
}
- _MSG("Waiting for data availability");
- fflush(stdout);
-
/* Check for data availability */
do {
data_ret = lttng_data_pending(session_name);
*/
if (data_ret) {
usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME);
- _MSG(".");
- fflush(stdout);
}
} while (data_ret != 0);
- MSG("");
-
end:
error:
return ret;
filter_expression, 0, NULL);
}
+/*
+ * Depending on the event, return a newly allocated agent filter expression or
+ * NULL if not applicable.
+ *
+ * An event with NO loglevel and the name is * will return NULL.
+ */
+static char *set_agent_filter(const char *filter, struct lttng_event *ev)
+{
+ int err;
+ char *agent_filter = NULL;
+
+ assert(ev);
+
+ /* Don't add filter for the '*' event. */
+ if (ev->name[0] != '*') {
+ if (filter) {
+ err = asprintf(&agent_filter, "(%s) && (logger_name == \"%s\")", filter,
+ ev->name);
+ } else {
+ err = asprintf(&agent_filter, "logger_name == \"%s\"", ev->name);
+ }
+ if (err < 0) {
+ PERROR("asprintf");
+ goto error;
+ }
+ }
+
+ /* Add loglevel filtering if any for the JUL domain. */
+ if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) {
+ char *op;
+
+ if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) {
+ op = ">=";
+ } else {
+ op = "==";
+ }
+
+ if (filter || agent_filter) {
+ char *new_filter;
+
+ err = asprintf(&new_filter, "(%s) && (int_loglevel %s %d)",
+ agent_filter ? agent_filter : filter, op,
+ ev->loglevel);
+ if (agent_filter) {
+ free(agent_filter);
+ }
+ agent_filter = new_filter;
+ } else {
+ err = asprintf(&agent_filter, "int_loglevel %s %d", op,
+ ev->loglevel);
+ }
+ if (err < 0) {
+ PERROR("asprintf");
+ goto error;
+ }
+ }
+
+ return agent_filter;
+error:
+ free(agent_filter);
+ return NULL;
+}
+
+/*
+ * Generate the filter bytecode from a given filter expression string. Put the
+ * newly allocated parser context in ctxp and populate the lsm object with the
+ * expression len.
+ *
+ * Return 0 on success else a LTTNG_ERR_* code and ctxp is untouched.
+ */
+static int generate_filter(char *filter_expression,
+ struct lttcomm_session_msg *lsm, struct filter_parser_ctx **ctxp)
+{
+ int ret;
+ struct filter_parser_ctx *ctx = NULL;
+ FILE *fmem = NULL;
+
+ assert(filter_expression);
+ assert(lsm);
+ assert(ctxp);
+
+ /*
+ * Casting const to non-const, as the underlying function will use it in
+ * read-only mode.
+ */
+ fmem = lttng_fmemopen((void *) filter_expression,
+ strlen(filter_expression), "r");
+ if (!fmem) {
+ fprintf(stderr, "Error opening memory as stream\n");
+ ret = -LTTNG_ERR_FILTER_NOMEM;
+ goto error;
+ }
+ ctx = filter_parser_ctx_alloc(fmem);
+ if (!ctx) {
+ fprintf(stderr, "Error allocating parser\n");
+ ret = -LTTNG_ERR_FILTER_NOMEM;
+ goto filter_alloc_error;
+ }
+ ret = filter_parser_ctx_append_ast(ctx);
+ if (ret) {
+ fprintf(stderr, "Parse error\n");
+ ret = -LTTNG_ERR_FILTER_INVAL;
+ goto parse_error;
+ }
+ ret = filter_visitor_set_parent(ctx);
+ if (ret) {
+ fprintf(stderr, "Set parent error\n");
+ ret = -LTTNG_ERR_FILTER_INVAL;
+ goto parse_error;
+ }
+ if (print_xml) {
+ ret = filter_visitor_print_xml(ctx, stdout, 0);
+ if (ret) {
+ fflush(stdout);
+ fprintf(stderr, "XML print error\n");
+ ret = -LTTNG_ERR_FILTER_INVAL;
+ goto parse_error;
+ }
+ }
+
+ dbg_printf("Generating IR... ");
+ fflush(stdout);
+ ret = filter_visitor_ir_generate(ctx);
+ if (ret) {
+ fprintf(stderr, "Generate IR error\n");
+ ret = -LTTNG_ERR_FILTER_INVAL;
+ goto parse_error;
+ }
+ dbg_printf("done\n");
+
+ dbg_printf("Validating IR... ");
+ fflush(stdout);
+ ret = filter_visitor_ir_check_binary_op_nesting(ctx);
+ if (ret) {
+ ret = -LTTNG_ERR_FILTER_INVAL;
+ goto parse_error;
+ }
+ /* Validate strings used as literals in the expression */
+ ret = filter_visitor_ir_validate_string(ctx);
+ if (ret) {
+ ret = -LTTNG_ERR_FILTER_INVAL;
+ goto parse_error;
+ }
+ dbg_printf("done\n");
+
+ dbg_printf("Generating bytecode... ");
+ fflush(stdout);
+ ret = filter_visitor_bytecode_generate(ctx);
+ if (ret) {
+ fprintf(stderr, "Generate bytecode error\n");
+ ret = -LTTNG_ERR_FILTER_INVAL;
+ goto parse_error;
+ }
+ dbg_printf("done\n");
+ dbg_printf("Size of bytecode generated: %u bytes.\n",
+ bytecode_get_len(&ctx->bytecode->b));
+
+ lsm->u.enable.bytecode_len = sizeof(ctx->bytecode->b)
+ + bytecode_get_len(&ctx->bytecode->b);
+ lsm->u.enable.expression_len = strlen(filter_expression) + 1;
+
+ /* No need to keep the memory stream. */
+ if (fclose(fmem) != 0) {
+ PERROR("fclose");
+ }
+
+ *ctxp = ctx;
+ return 0;
+
+parse_error:
+ filter_ir_free(ctx);
+ filter_parser_ctx_free(ctx);
+filter_alloc_error:
+ if (fclose(fmem) != 0) {
+ PERROR("fclose");
+ }
+error:
+ return ret;
+}
+
/*
* Enable event(s) for a channel, possibly with exclusions and a filter.
* If no event name is specified, all events are enabled.
*/
int lttng_enable_event_with_exclusions(struct lttng_handle *handle,
struct lttng_event *ev, const char *channel_name,
- const char *filter_expression,
+ const char *original_filter_expression,
int exclusion_count, char **exclusion_list)
{
struct lttcomm_session_msg lsm;
char *varlen_data;
int ret = 0;
+ unsigned int free_filter_expression = 0;
struct filter_parser_ctx *ctx = NULL;
- FILE *fmem = NULL;
+ /*
+ * Cast as non-const since we may replace the filter expression
+ * by a dynamically allocated string. Otherwise, the original
+ * string is not modified.
+ */
+ char *filter_expression = (char *) original_filter_expression;
if (handle == NULL || ev == NULL) {
- return -LTTNG_ERR_INVALID;
+ ret = -LTTNG_ERR_INVALID;
+ goto error;
}
/* Empty filter string will always be rejected by the parser
* lttng_fmemopen error for 0-byte allocation.
*/
if (filter_expression && filter_expression[0] == '\0') {
- return -LTTNG_ERR_INVALID;
+ ret = -LTTNG_ERR_INVALID;
+ goto error;
}
memset(&lsm, 0, sizeof(lsm));
sizeof(lsm.u.enable.channel_name));
}
- if (ev->name[0] != '\0') {
- lsm.cmd_type = LTTNG_ENABLE_EVENT;
- } else {
- lsm.cmd_type = LTTNG_ENABLE_ALL_EVENT;
+ lsm.cmd_type = LTTNG_ENABLE_EVENT;
+ if (ev->name[0] == '\0') {
+ /* Enable all events */
+ lttng_ctl_copy_string(ev->name, "*", sizeof(ev->name));
}
lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
+ /* FIXME: copying non-packed struct to packed struct. */
memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event));
lttng_ctl_copy_string(lsm.session.name, handle->session_name,
lsm.u.enable.exclusion_count = exclusion_count;
lsm.u.enable.bytecode_len = 0;
- if (exclusion_count == 0 && filter_expression == NULL) {
- ret = lttng_ctl_ask_sessiond(&lsm, NULL);
- return ret;
+ /*
+ * For the JUL domain, a filter is enforced except for the enable all
+ * event. This is done to avoid having the event in all sessions thus
+ * filtering by logger name.
+ */
+ if (exclusion_count == 0 && filter_expression == NULL &&
+ (handle->domain.type != LTTNG_DOMAIN_JUL &&
+ handle->domain.type != LTTNG_DOMAIN_LOG4J &&
+ handle->domain.type != LTTNG_DOMAIN_PYTHON)) {
+ goto ask_sessiond;
}
/*
*/
/* Parse filter expression */
- if (filter_expression != NULL) {
-
- /*
- * casting const to non-const, as the underlying function will
- * use it in read-only mode.
- */
- fmem = lttng_fmemopen((void *) filter_expression,
- strlen(filter_expression), "r");
- if (!fmem) {
- fprintf(stderr, "Error opening memory as stream\n");
- return -LTTNG_ERR_FILTER_NOMEM;
- }
- ctx = filter_parser_ctx_alloc(fmem);
- if (!ctx) {
- fprintf(stderr, "Error allocating parser\n");
- ret = -LTTNG_ERR_FILTER_NOMEM;
- goto filter_alloc_error;
- }
- ret = filter_parser_ctx_append_ast(ctx);
- if (ret) {
- fprintf(stderr, "Parse error\n");
- ret = -LTTNG_ERR_FILTER_INVAL;
- goto parse_error;
- }
- ret = filter_visitor_set_parent(ctx);
- if (ret) {
- fprintf(stderr, "Set parent error\n");
- ret = -LTTNG_ERR_FILTER_INVAL;
- goto parse_error;
- }
- if (print_xml) {
- ret = filter_visitor_print_xml(ctx, stdout, 0);
- if (ret) {
- fflush(stdout);
- fprintf(stderr, "XML print error\n");
- ret = -LTTNG_ERR_FILTER_INVAL;
- goto parse_error;
+ if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL
+ || handle->domain.type == LTTNG_DOMAIN_LOG4J
+ || handle->domain.type == LTTNG_DOMAIN_PYTHON) {
+ if (handle->domain.type == LTTNG_DOMAIN_JUL ||
+ handle->domain.type == LTTNG_DOMAIN_LOG4J ||
+ handle->domain.type == LTTNG_DOMAIN_PYTHON) {
+ char *agent_filter;
+
+ /* Setup JUL filter if needed. */
+ agent_filter = set_agent_filter(filter_expression, ev);
+ if (!agent_filter) {
+ if (!filter_expression) {
+ /* No JUL and no filter, just skip everything below. */
+ goto ask_sessiond;
+ }
+ } else {
+ /*
+ * With an agent filter, the original filter has been added to
+ * it thus replace the filter expression.
+ */
+ filter_expression = agent_filter;
+ free_filter_expression = 1;
}
}
- dbg_printf("Generating IR... ");
- fflush(stdout);
- ret = filter_visitor_ir_generate(ctx);
+ ret = generate_filter(filter_expression, &lsm, &ctx);
if (ret) {
- fprintf(stderr, "Generate IR error\n");
- ret = -LTTNG_ERR_FILTER_INVAL;
- goto parse_error;
+ goto filter_error;
}
- dbg_printf("done\n");
-
- dbg_printf("Validating IR... ");
- fflush(stdout);
- ret = filter_visitor_ir_check_binary_op_nesting(ctx);
- if (ret) {
- ret = -LTTNG_ERR_FILTER_INVAL;
- goto parse_error;
- }
- dbg_printf("done\n");
-
- dbg_printf("Generating bytecode... ");
- fflush(stdout);
- ret = filter_visitor_bytecode_generate(ctx);
- if (ret) {
- fprintf(stderr, "Generate bytecode error\n");
- ret = -LTTNG_ERR_FILTER_INVAL;
- goto parse_error;
- }
- dbg_printf("done\n");
- dbg_printf("Size of bytecode generated: %u bytes.\n",
- bytecode_get_len(&ctx->bytecode->b));
+ }
- lsm.u.enable.bytecode_len = sizeof(ctx->bytecode->b)
- + bytecode_get_len(&ctx->bytecode->b);
+ varlen_data = zmalloc(lsm.u.enable.bytecode_len
+ + lsm.u.enable.expression_len
+ + LTTNG_SYMBOL_NAME_LEN * exclusion_count);
+ if (!varlen_data) {
+ ret = -LTTNG_ERR_EXCLUSION_NOMEM;
+ goto mem_error;
}
- /* Allocate variable length data */
- if (lsm.u.enable.exclusion_count != 0) {
- varlen_data = zmalloc(lsm.u.enable.bytecode_len
- + LTTNG_SYMBOL_NAME_LEN * exclusion_count);
- if (!varlen_data) {
- ret = -LTTNG_ERR_EXCLUSION_NOMEM;
- goto varlen_alloc_error;
- }
- /* Put exclusion names first in the data */
- while (exclusion_count--) {
- strncpy(varlen_data + LTTNG_SYMBOL_NAME_LEN * exclusion_count,
- *(exclusion_list + exclusion_count),
- LTTNG_SYMBOL_NAME_LEN);
- }
- /* Add filter bytecode next */
- if (lsm.u.enable.bytecode_len != 0) {
- memcpy(varlen_data + LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count,
- &ctx->bytecode->b,
- lsm.u.enable.bytecode_len);
- }
- } else {
- /* no exclusions - use the already allocated filter bytecode */
- varlen_data = (char *)(&ctx->bytecode->b);
+ /* Put exclusion names first in the data */
+ while (exclusion_count--) {
+ strncpy(varlen_data + LTTNG_SYMBOL_NAME_LEN * exclusion_count,
+ *(exclusion_list + exclusion_count),
+ LTTNG_SYMBOL_NAME_LEN - 1);
+ }
+ /* Add filter expression next */
+ if (lsm.u.enable.expression_len != 0) {
+ memcpy(varlen_data
+ + LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count,
+ filter_expression,
+ lsm.u.enable.expression_len);
+ }
+ /* Add filter bytecode next */
+ if (ctx && lsm.u.enable.bytecode_len != 0) {
+ memcpy(varlen_data
+ + LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count
+ + lsm.u.enable.expression_len,
+ &ctx->bytecode->b,
+ lsm.u.enable.bytecode_len);
}
ret = lttng_ctl_ask_sessiond_varlen(&lsm, varlen_data,
(LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count) +
- lsm.u.enable.bytecode_len, NULL);
-
- if (lsm.u.enable.exclusion_count != 0) {
- free(varlen_data);
- }
+ lsm.u.enable.bytecode_len + lsm.u.enable.expression_len, NULL);
+ free(varlen_data);
-varlen_alloc_error:
- if (filter_expression) {
+mem_error:
+ if (filter_expression && ctx) {
filter_bytecode_free(ctx);
filter_ir_free(ctx);
filter_parser_ctx_free(ctx);
- if (fclose(fmem) != 0) {
- perror("fclose");
- }
}
+filter_error:
+ if (free_filter_expression) {
+ /*
+ * The filter expression has been replaced and must be freed as it is
+ * not the original filter expression received as a parameter.
+ */
+ free(filter_expression);
+ }
+error:
+ /*
+ * Return directly to the caller and don't ask the sessiond since something
+ * went wrong in the parsing of data above.
+ */
return ret;
-parse_error:
- filter_bytecode_free(ctx);
- filter_ir_free(ctx);
- filter_parser_ctx_free(ctx);
-filter_alloc_error:
- if (fclose(fmem) != 0) {
- perror("fclose");
- }
+ask_sessiond:
+ ret = lttng_ctl_ask_sessiond(&lsm, NULL);
return ret;
}
-/*
- * Disable event(s) of a channel and domain.
- * If no event name is specified, all events are disabled.
- * If no channel name is specified, the default 'channel0' is used.
- * Returns size of returned session payload data or a negative error code.
- */
-int lttng_disable_event(struct lttng_handle *handle, const char *name,
- const char *channel_name)
+int lttng_disable_event_ext(struct lttng_handle *handle,
+ struct lttng_event *ev, const char *channel_name,
+ const char *original_filter_expression)
{
struct lttcomm_session_msg lsm;
+ char *varlen_data;
+ int ret = 0;
+ unsigned int free_filter_expression = 0;
+ struct filter_parser_ctx *ctx = NULL;
+ /*
+ * Cast as non-const since we may replace the filter expression
+ * by a dynamically allocated string. Otherwise, the original
+ * string is not modified.
+ */
+ char *filter_expression = (char *) original_filter_expression;
- if (handle == NULL) {
- return -LTTNG_ERR_INVALID;
+ if (handle == NULL || ev == NULL) {
+ ret = -LTTNG_ERR_INVALID;
+ goto error;
+ }
+
+ /* Empty filter string will always be rejected by the parser
+ * anyway, so treat this corner-case early to eliminate
+ * lttng_fmemopen error for 0-byte allocation.
+ */
+ if (filter_expression && filter_expression[0] == '\0') {
+ ret = -LTTNG_ERR_INVALID;
+ goto error;
}
memset(&lsm, 0, sizeof(lsm));
sizeof(lsm.u.disable.channel_name));
}
- lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
+ lsm.cmd_type = LTTNG_DISABLE_EVENT;
- if (name != NULL) {
- lttng_ctl_copy_string(lsm.u.disable.name, name,
- sizeof(lsm.u.disable.name));
- lsm.cmd_type = LTTNG_DISABLE_EVENT;
- } else {
- lsm.cmd_type = LTTNG_DISABLE_ALL_EVENT;
- }
+ lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
+ /* FIXME: copying non-packed struct to packed struct. */
+ memcpy(&lsm.u.disable.event, ev, sizeof(lsm.u.disable.event));
lttng_ctl_copy_string(lsm.session.name, handle->session_name,
sizeof(lsm.session.name));
+ lsm.u.disable.bytecode_len = 0;
- return lttng_ctl_ask_sessiond(&lsm, NULL);
+ /*
+ * For the JUL domain, a filter is enforced except for the
+ * disable all event. This is done to avoid having the event in
+ * all sessions thus filtering by logger name.
+ */
+ if (filter_expression == NULL &&
+ (handle->domain.type != LTTNG_DOMAIN_JUL &&
+ handle->domain.type != LTTNG_DOMAIN_LOG4J &&
+ handle->domain.type != LTTNG_DOMAIN_PYTHON)) {
+ goto ask_sessiond;
+ }
+
+ /*
+ * We have a filter, so we need to set up a variable-length
+ * memory block from where to send the data.
+ */
+
+ /* Parse filter expression */
+ if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL
+ || handle->domain.type == LTTNG_DOMAIN_LOG4J
+ || handle->domain.type == LTTNG_DOMAIN_PYTHON) {
+ if (handle->domain.type == LTTNG_DOMAIN_JUL ||
+ handle->domain.type == LTTNG_DOMAIN_LOG4J ||
+ handle->domain.type == LTTNG_DOMAIN_PYTHON) {
+ char *agent_filter;
+
+ /* Setup JUL filter if needed. */
+ agent_filter = set_agent_filter(filter_expression, ev);
+ if (!agent_filter) {
+ if (!filter_expression) {
+ /* No JUL and no filter, just skip everything below. */
+ goto ask_sessiond;
+ }
+ } else {
+ /*
+ * With a JUL filter, the original filter has been added to it
+ * thus replace the filter expression.
+ */
+ filter_expression = agent_filter;
+ free_filter_expression = 1;
+ }
+ }
+
+ ret = generate_filter(filter_expression, &lsm, &ctx);
+ if (ret) {
+ goto filter_error;
+ }
+ }
+
+ varlen_data = zmalloc(lsm.u.disable.bytecode_len
+ + lsm.u.disable.expression_len);
+ if (!varlen_data) {
+ ret = -LTTNG_ERR_EXCLUSION_NOMEM;
+ goto mem_error;
+ }
+
+ /* Add filter expression */
+ if (lsm.u.disable.expression_len != 0) {
+ memcpy(varlen_data,
+ filter_expression,
+ lsm.u.disable.expression_len);
+ }
+ /* Add filter bytecode next */
+ if (ctx && lsm.u.disable.bytecode_len != 0) {
+ memcpy(varlen_data
+ + lsm.u.disable.expression_len,
+ &ctx->bytecode->b,
+ lsm.u.disable.bytecode_len);
+ }
+
+ ret = lttng_ctl_ask_sessiond_varlen(&lsm, varlen_data,
+ lsm.u.disable.bytecode_len + lsm.u.disable.expression_len, NULL);
+ free(varlen_data);
+
+mem_error:
+ if (filter_expression && ctx) {
+ filter_bytecode_free(ctx);
+ filter_ir_free(ctx);
+ filter_parser_ctx_free(ctx);
+ }
+filter_error:
+ if (free_filter_expression) {
+ /*
+ * The filter expression has been replaced and must be freed as it is
+ * not the original filter expression received as a parameter.
+ */
+ free(filter_expression);
+ }
+error:
+ /*
+ * Return directly to the caller and don't ask the sessiond since something
+ * went wrong in the parsing of data above.
+ */
+ return ret;
+
+ask_sessiond:
+ ret = lttng_ctl_ask_sessiond(&lsm, NULL);
+ return ret;
+}
+
+/*
+ * Disable event(s) of a channel and domain.
+ * If no event name is specified, all events are disabled.
+ * If no channel name is specified, the default 'channel0' is used.
+ * Returns size of returned session payload data or a negative error code.
+ */
+int lttng_disable_event(struct lttng_handle *handle, const char *name,
+ const char *channel_name)
+{
+ struct lttng_event ev;
+
+ memset(&ev, 0, sizeof(ev));
+ ev.loglevel = -1;
+ ev.type = LTTNG_EVENT_ALL;
+ lttng_ctl_copy_string(ev.name, name, sizeof(ev.name));
+ return lttng_disable_event_ext(handle, &ev, channel_name, NULL);
}
/*
return lttng_ctl_ask_sessiond(&lsm, NULL);
}
+/*
+ * Add PID to session tracker.
+ * Return 0 on success else a negative LTTng error code.
+ */
+int lttng_track_pid(struct lttng_handle *handle, int pid)
+{
+ struct lttcomm_session_msg lsm;
+
+ /*
+ * NULL arguments are forbidden. No default values.
+ */
+ if (handle == NULL) {
+ return -LTTNG_ERR_INVALID;
+ }
+
+ memset(&lsm, 0, sizeof(lsm));
+
+ lsm.cmd_type = LTTNG_TRACK_PID;
+ lsm.u.pid_tracker.pid = pid;
+
+ lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
+
+ lttng_ctl_copy_string(lsm.session.name, handle->session_name,
+ sizeof(lsm.session.name));
+
+ return lttng_ctl_ask_sessiond(&lsm, NULL);
+}
+
+/*
+ * Remove PID from session tracker.
+ * Return 0 on success else a negative LTTng error code.
+ */
+int lttng_untrack_pid(struct lttng_handle *handle, int pid)
+{
+ struct lttcomm_session_msg lsm;
+
+ /*
+ * NULL arguments are forbidden. No default values.
+ */
+ if (handle == NULL) {
+ return -LTTNG_ERR_INVALID;
+ }
+
+ memset(&lsm, 0, sizeof(lsm));
+
+ lsm.cmd_type = LTTNG_UNTRACK_PID;
+ lsm.u.pid_tracker.pid = pid;
+
+ lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
+
+ lttng_ctl_copy_string(lsm.session.name, handle->session_name,
+ sizeof(lsm.session.name));
+
+ return lttng_ctl_ask_sessiond(&lsm, NULL);
+}
+
/*
* Lists all available tracepoints of domain.
* Sets the contents of the events array.
return -LTTNG_ERR_INVALID;
}
+ memset(&lsm, 0, sizeof(lsm));
lsm.cmd_type = LTTNG_LIST_TRACEPOINTS;
lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
return -LTTNG_ERR_INVALID;
}
+ memset(&lsm, 0, sizeof(lsm));
lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS;
lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
return ret / sizeof(struct lttng_event_field);
}
+/*
+ * Lists all available kernel system calls. Allocates and sets the contents of
+ * the events array.
+ *
+ * Returns the number of lttng_event entries in events; on error, returns a
+ * negative value.
+ */
+int lttng_list_syscalls(struct lttng_event **events)
+{
+ int ret;
+ struct lttcomm_session_msg lsm;
+
+ if (!events) {
+ return -LTTNG_ERR_INVALID;
+ }
+
+ memset(&lsm, 0, sizeof(lsm));
+ lsm.cmd_type = LTTNG_LIST_SYSCALLS;
+ /* Force kernel domain for system calls. */
+ lsm.domain.type = LTTNG_DOMAIN_KERNEL;
+
+ ret = lttng_ctl_ask_sessiond(&lsm, (void **) events);
+ if (ret < 0) {
+ return ret;
+ }
+
+ return ret / sizeof(struct lttng_event);
+}
+
/*
* Returns a human readable string describing
* the error code (a negative value).
return -LTTNG_ERR_INVALID;
}
+ memset(&lsm, 0, sizeof(lsm));
lsm.cmd_type = LTTNG_DESTROY_SESSION;
lttng_ctl_copy_string(lsm.session.name, session_name,
int ret;
struct lttcomm_session_msg lsm;
+ memset(&lsm, 0, sizeof(lsm));
lsm.cmd_type = LTTNG_LIST_SESSIONS;
ret = lttng_ctl_ask_sessiond(&lsm, (void**) sessions);
if (ret < 0) {
return ret / sizeof(struct lttng_session);
}
+int lttng_set_session_shm_path(const char *session_name,
+ const char *shm_path)
+{
+ struct lttcomm_session_msg lsm;
+
+ if (session_name == NULL) {
+ return -LTTNG_ERR_INVALID;
+ }
+
+ memset(&lsm, 0, sizeof(lsm));
+ lsm.cmd_type = LTTNG_SET_SESSION_SHM_PATH;
+
+ lttng_ctl_copy_string(lsm.session.name, session_name,
+ sizeof(lsm.session.name));
+ lttng_ctl_copy_string(lsm.u.set_shm_path.shm_path, shm_path,
+ sizeof(lsm.u.set_shm_path.shm_path));
+
+ return lttng_ctl_ask_sessiond(&lsm, NULL);
+}
+
/*
* Ask the session daemon for all available domains of a session.
* Sets the contents of the domains array.
return -LTTNG_ERR_INVALID;
}
+ memset(&lsm, 0, sizeof(lsm));
lsm.cmd_type = LTTNG_LIST_DOMAINS;
lttng_ctl_copy_string(lsm.session.name, session_name,
return -LTTNG_ERR_INVALID;
}
+ memset(&lsm, 0, sizeof(lsm));
lsm.cmd_type = LTTNG_LIST_CHANNELS;
lttng_ctl_copy_string(lsm.session.name, handle->session_name,
sizeof(lsm.session.name));
return -LTTNG_ERR_INVALID;
}
+ memset(&lsm, 0, sizeof(lsm));
lsm.cmd_type = LTTNG_LIST_EVENTS;
lttng_ctl_copy_string(lsm.session.name, handle->session_name,
sizeof(lsm.session.name));
return -LTTNG_ERR_INVALID;
}
+ memset(&lsm, 0, sizeof(lsm));
lsm.cmd_type = LTTNG_CALIBRATE;
lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
{
int ret;
struct lttcomm_session_msg lsm;
+ uint8_t *pending = NULL;
if (session_name == NULL) {
return -LTTNG_ERR_INVALID;
}
+ memset(&lsm, 0, sizeof(lsm));
lsm.cmd_type = LTTNG_DATA_PENDING;
lttng_ctl_copy_string(lsm.session.name, session_name,
sizeof(lsm.session.name));
- ret = lttng_ctl_ask_sessiond(&lsm, NULL);
-
- /*
- * The lttng_ctl_ask_sessiond function negate the return code if it's not
- * LTTNG_OK so getting -1 means that the reply ret_code was 1 thus meaning
- * that the data is available. Yes it is hackish but for now this is the
- * only way.
- */
- if (ret == -1) {
- ret = 1;
+ ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pending);
+ if (ret < 0) {
+ goto end;
+ } else if (ret != 1) {
+ /* Unexpected payload size */
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
}
+ ret = (int) *pending;
+end:
+ free(pending);
return ret;
}
struct lttcomm_session_msg lsm;
struct lttng_uri *uris = NULL;
- if (name == NULL) {
+ if (name == NULL || timer_interval == 0) {
return -LTTNG_ERR_INVALID;
}
lsm.cmd_type = LTTNG_CREATE_SESSION_LIVE;
lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name));
- size = uri_parse_str_urls(url, NULL, &uris);
- if (size <= 0) {
- ret = -LTTNG_ERR_INVALID;
- goto end;
- }
+ if (url) {
+ size = uri_parse_str_urls(url, NULL, &uris);
+ if (size <= 0) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
- /* file:// is not accepted for live session. */
- if (uris[0].dtype == LTTNG_DST_PATH) {
- ret = -LTTNG_ERR_INVALID;
- goto end;
+ /* file:// is not accepted for live session. */
+ if (uris[0].dtype == LTTNG_DST_PATH) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ } else {
+ size = 0;
}
lsm.u.session_live.nb_uri = size;
return ret;
}
+/*
+ * List PIDs in the tracker.
+ *
+ * enabled is set to whether the PID tracker is enabled.
+ * pids is set to an allocated array of PIDs currently tracked. On
+ * success, pids must be freed by the caller.
+ * nr_pids is set to the number of entries contained by the pids array.
+ *
+ * Returns 0 on success, else a negative LTTng error code.
+ */
+int lttng_list_tracker_pids(struct lttng_handle *handle,
+ int *_enabled, int32_t **_pids, size_t *_nr_pids)
+{
+ int ret;
+ int enabled = 1;
+ struct lttcomm_session_msg lsm;
+ size_t nr_pids;
+ int32_t *pids;
+
+ if (handle == NULL) {
+ return -LTTNG_ERR_INVALID;
+ }
+
+ memset(&lsm, 0, sizeof(lsm));
+ lsm.cmd_type = LTTNG_LIST_TRACKER_PIDS;
+ lttng_ctl_copy_string(lsm.session.name, handle->session_name,
+ sizeof(lsm.session.name));
+ lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
+
+ ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pids);
+ if (ret < 0) {
+ return ret;
+ }
+ nr_pids = ret / sizeof(int32_t);
+ if (nr_pids == 1 && pids[0] == -1) {
+ free(pids);
+ pids = NULL;
+ enabled = 0;
+ nr_pids = 0;
+ }
+ *_enabled = enabled;
+ *_pids = pids;
+ *_nr_pids = nr_pids;
+ return 0;
+}
+
/*
* lib constructor
*/
projects / lttng-tools.git / blobdiff