* Linux Trace Toolkit Control Library
*
* Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
+ * Copyright (C) 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License, version 2.1 only,
* 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>
#include <common/uri.h>
#include <common/utils.h>
#include <lttng/lttng.h>
+#include <lttng/health-internal.h>
#include "filter/filter-ast.h"
#include "filter/filter-parser.h"
/* Socket to session daemon for communication */
static int sessiond_socket;
static char sessiond_sock_path[PATH_MAX];
-static char health_sock_path[PATH_MAX];
/* Variables */
static char *tracing_group;
*/
int lttng_opt_quiet;
int lttng_opt_verbose;
+int lttng_opt_mi;
/*
* Copy string from src to dst and enforce null terminated byte.
switch (src->type) {
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:
}
/*
- * Check if we are in the specified group.
+ * Check if we are in the specified group.
*
- * If yes return 1, else return -1.
+ * If yes return 1, else return -1.
*/
-static int check_tracing_group(const char *grp_name)
+LTTNG_HIDDEN
+int lttng_check_tracing_group(void)
{
struct group *grp_tracing; /* no free(). See getgrnam(3) */
gid_t *grp_list;
int grp_list_size, grp_id, i;
int ret = -1;
+ const char *grp_name = tracing_group;
/* Get GID of group 'tracing' */
grp_tracing = getgrnam(grp_name);
/* 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_connect_unix_sock(sock_path);
if (ret < 0) {
- /* Not alive */
+ /* Not alive. */
goto error;
}
ret = lttcomm_close_unix_sock(ret);
if (ret < 0) {
- perror("lttcomm_close_unix_sock");
+ PERROR("lttcomm_close_unix_sock");
}
return 0;
*/
static int set_session_daemon_path(void)
{
- int in_tgroup = 0; /* In tracing group */
+ int in_tgroup = 0; /* In tracing group. */
uid_t uid;
uid = getuid();
if (uid != 0) {
/* Are we in the tracing group ? */
- in_tgroup = check_tracing_group(tracing_group);
+ in_tgroup = lttng_check_tracing_group();
}
if ((uid == 0) || in_tgroup) {
int ret;
if (in_tgroup) {
- /* Tracing group */
+ /* Tracing group. */
ret = try_connect_sessiond(sessiond_sock_path);
if (ret >= 0) {
goto end;
/* ...or not in tracing group (and not root), default */
/*
- * With GNU C < 2.1, snprintf returns -1 if the target buffer is too small;
- * With GNU C >= 2.1, snprintf returns the required size (excluding closing null)
+ * With GNU C < 2.1, snprintf returns -1 if the target buffer
+ * is too small;
+ * With GNU C >= 2.1, snprintf returns the required size
+ * (excluding closing null)
*/
ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path),
DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir());
}
/*
- * Connect to the LTTng session daemon.
+ * Connect to the LTTng session daemon.
*
- * On success, return 0. On error, return -1.
+ * On success, return 0. On error, return -1.
*/
static int connect_sessiond(void)
{
int ret;
+ /* Don't try to connect if already connected. */
+ if (connected) {
+ return 0;
+ }
+
ret = set_session_daemon_path();
if (ret < 0) {
goto error;
}
- /* Connect to the sesssion daemon */
+ /* Connect to the sesssion daemon. */
ret = lttcomm_connect_unix_sock(sessiond_sock_path);
if (ret < 0) {
goto error;
/*
* Clean disconnect from the session daemon.
+ *
* On success, return 0. On error, return -1.
*/
static int disconnect_sessiond(void)
goto end;
}
- data = (void*) malloc(size);
+ data = zmalloc(size);
+ if (!data) {
+ ret = -ENOMEM;
+ goto end;
+ }
/* Get payload data */
ret = recv_data_sessiond(data, size);
/*
* Create lttng handle and return pointer.
+ *
* The returned pointer will be NULL in case of malloc() error.
*/
struct lttng_handle *lttng_create_handle(const char *session_name,
goto end;
}
- handle = malloc(sizeof(struct lttng_handle));
+ handle = zmalloc(sizeof(struct lttng_handle));
if (handle == NULL) {
PERROR("malloc handle");
goto end;
/*
* Register an outside consumer.
+ *
* Returns size of returned session payload data or a negative error code.
*/
int lttng_register_consumer(struct lttng_handle *handle,
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));
lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
- lttng_ctl_copy_string(lsm.u.reg.path, socket_path, sizeof(lsm.u.reg.path));
+ lttng_ctl_copy_string(lsm.u.reg.path, socket_path,
+ sizeof(lsm.u.reg.path));
return lttng_ctl_ask_sessiond(&lsm, NULL);
}
/*
- * Start tracing for all traces of the session.
- * Returns size of returned session payload data or a negative error code.
+ * Start tracing for all traces of the session.
+ *
+ * Returns size of returned session payload data or a negative error code.
*/
int lttng_start_tracing(const char *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");
-
/* Check for data availability */
do {
data_ret = lttng_data_pending(session_name);
}
/*
- * Data sleep time before retrying (in usec). Don't sleep if the call
- * returned value indicates availability.
+ * Data sleep time before retrying (in usec). Don't sleep if the
+ * call returned value indicates availability.
*/
if (data_ret) {
usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME);
- _MSG(".");
}
} while (data_ret != 0);
- MSG("");
-
end:
error:
return ret;
struct lttng_event_context *ctx, const char *event_name,
const char *channel_name)
{
+ int ret;
+ size_t len = 0;
+ char *buf = NULL;
struct lttcomm_session_msg lsm;
- /* Safety check. Both are mandatory */
+ /* Safety check. Both are mandatory. */
if (handle == NULL || ctx == NULL) {
- return -LTTNG_ERR_INVALID;
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
}
memset(&lsm, 0, sizeof(lsm));
-
lsm.cmd_type = LTTNG_ADD_CONTEXT;
- /* Copy channel name */
- lttng_ctl_copy_string(lsm.u.context.channel_name, channel_name,
- sizeof(lsm.u.context.channel_name));
+ /* If no channel name, send empty string. */
+ if (channel_name == NULL) {
+ lttng_ctl_copy_string(lsm.u.context.channel_name, "",
+ sizeof(lsm.u.context.channel_name));
+ } else {
+ lttng_ctl_copy_string(lsm.u.context.channel_name, channel_name,
+ sizeof(lsm.u.context.channel_name));
+ }
lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
-
- memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context));
-
lttng_ctl_copy_string(lsm.session.name, handle->session_name,
sizeof(lsm.session.name));
- return lttng_ctl_ask_sessiond(&lsm, NULL);
-}
+ if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) {
+ size_t provider_len, ctx_len;
+ const char *provider_name = ctx->u.app_ctx.provider_name;
+ const char *ctx_name = ctx->u.app_ctx.ctx_name;
-/*
- * Enable event(s) for a channel.
- * If no event name is specified, all events are enabled.
- * 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_enable_event(struct lttng_handle *handle,
- struct lttng_event *ev, const char *channel_name)
-{
- struct lttcomm_session_msg lsm;
-
- if (handle == NULL || ev == NULL) {
- return -LTTNG_ERR_INVALID;
- }
+ if (!provider_name || !ctx_name) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
- memset(&lsm, 0, sizeof(lsm));
+ provider_len = strlen(provider_name);
+ if (provider_len == 0) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ lsm.u.context.provider_name_len = provider_len;
- /* If no channel name, we put the default name */
- if (channel_name == NULL) {
- lttng_ctl_copy_string(lsm.u.enable.channel_name, DEFAULT_CHANNEL_NAME,
- sizeof(lsm.u.enable.channel_name));
- } else {
- lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name,
- sizeof(lsm.u.enable.channel_name));
- }
+ ctx_len = strlen(ctx_name);
+ if (ctx_len == 0) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+ lsm.u.context.context_name_len = ctx_len;
- lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
+ len = provider_len + ctx_len;
+ buf = zmalloc(len);
+ if (!buf) {
+ ret = -LTTNG_ERR_NOMEM;
+ goto end;
+ }
- if (ev->name[0] != '\0') {
- lsm.cmd_type = LTTNG_ENABLE_EVENT;
- } else {
- lsm.cmd_type = LTTNG_ENABLE_ALL_EVENT;
+ memcpy(buf, provider_name, provider_len);
+ memcpy(buf + provider_len, ctx_name, ctx_len);
}
- memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event));
+ memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context));
+ /* Don't leak application addresses to the sessiond. */
+ lsm.u.context.ctx.u.app_ctx.provider_name = NULL;
+ lsm.u.context.ctx.u.app_ctx.ctx_name = NULL;
- lttng_ctl_copy_string(lsm.session.name, handle->session_name,
- sizeof(lsm.session.name));
+ ret = lttng_ctl_ask_sessiond_varlen(&lsm, buf, len, NULL);
+end:
+ free(buf);
+ return ret;
+}
- return lttng_ctl_ask_sessiond(&lsm, NULL);
+/*
+ * Enable event(s) for a channel.
+ *
+ * If no event name is specified, all events are enabled.
+ * 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_enable_event(struct lttng_handle *handle,
+ struct lttng_event *ev, const char *channel_name)
+{
+ return lttng_enable_event_with_exclusions(handle, ev, channel_name,
+ NULL, 0, NULL);
}
/*
struct lttng_event *event, const char *channel_name,
const char *filter_expression)
{
- struct lttcomm_session_msg lsm;
- struct filter_parser_ctx *ctx;
- FILE *fmem;
- int ret = 0;
+ return lttng_enable_event_with_exclusions(handle, event, channel_name,
+ filter_expression, 0, NULL);
+}
- if (!filter_expression) {
- /*
- * Fall back to normal event enabling if no filter
- * specified.
- */
- return lttng_enable_event(handle, event, channel_name);
+/*
+ * 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;
+ }
}
- /*
- * 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 (handle == NULL || filter_expression[0] == '\0') {
- return -LTTNG_ERR_INVALID;
+ /* 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.
+ * 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;
+ 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 alloc_error;
+ goto filter_alloc_error;
}
ret = filter_parser_ctx_append_ast(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... ");
}
dbg_printf("done\n");
dbg_printf("Size of bytecode generated: %u bytes.\n",
- bytecode_get_len(&ctx->bytecode->b));
+ bytecode_get_len(&ctx->bytecode->b));
- memset(&lsm, 0, sizeof(lsm));
+ lsm->u.enable.bytecode_len = sizeof(ctx->bytecode->b)
+ + bytecode_get_len(&ctx->bytecode->b);
+ lsm->u.enable.expression_len = strlen(filter_expression) + 1;
- lsm.cmd_type = LTTNG_ENABLE_EVENT_WITH_FILTER;
+ /* No need to keep the memory stream. */
+ if (fclose(fmem) != 0) {
+ PERROR("fclose");
+ }
+
+ *ctxp = ctx;
+ return 0;
- /* Copy channel name */
- lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name,
- sizeof(lsm.u.enable.channel_name));
- /* Copy event name */
- if (event) {
- memcpy(&lsm.u.enable.event, event, sizeof(lsm.u.enable.event));
+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.
+ * If no channel name is specified, the default name is used.
+ * If filter expression is not NULL, the filter is set for the event.
+ * If exclusion count is not zero, the exclusions are set for the event.
+ * Returns size of returned session payload data or a negative error code.
+ */
+int lttng_enable_event_with_exclusions(struct lttng_handle *handle,
+ struct lttng_event *ev, const char *channel_name,
+ 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;
+ /*
+ * 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) {
+ 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;
}
- lsm.u.enable.bytecode_len = sizeof(ctx->bytecode->b)
- + bytecode_get_len(&ctx->bytecode->b);
+ memset(&lsm, 0, sizeof(lsm));
+
+ /* If no channel name, send empty string. */
+ if (channel_name == NULL) {
+ lttng_ctl_copy_string(lsm.u.enable.channel_name, "",
+ sizeof(lsm.u.enable.channel_name));
+ } else {
+ lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name,
+ sizeof(lsm.u.enable.channel_name));
+ }
+
+ 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,
sizeof(lsm.session.name));
+ lsm.u.enable.exclusion_count = exclusion_count;
+ lsm.u.enable.bytecode_len = 0;
+
+ /*
+ * 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;
+ }
- ret = lttng_ctl_ask_sessiond_varlen(&lsm, &ctx->bytecode->b,
- lsm.u.enable.bytecode_len, NULL);
+ /*
+ * We have either a filter or some exclusions, so we need to set up
+ * a variable-length memory block from where to send the data.
+ */
- filter_bytecode_free(ctx);
- filter_ir_free(ctx);
- filter_parser_ctx_free(ctx);
- if (fclose(fmem) != 0) {
- perror("fclose");
+ /* 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 an agent 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;
+ }
}
- return ret;
-parse_error:
- filter_bytecode_free(ctx);
- filter_ir_free(ctx);
- filter_parser_ctx_free(ctx);
-alloc_error:
- if (fclose(fmem) != 0) {
- perror("fclose");
+ 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;
+ }
+
+ /* 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 + lsm.u.enable.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)
+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));
- if (channel_name) {
- lttng_ctl_copy_string(lsm.u.disable.channel_name, channel_name,
+ /* If no channel name, send empty string. */
+ if (channel_name == NULL) {
+ lttng_ctl_copy_string(lsm.u.disable.channel_name, "",
sizeof(lsm.u.disable.channel_name));
} else {
- lttng_ctl_copy_string(lsm.u.disable.channel_name, DEFAULT_CHANNEL_NAME,
+ lttng_ctl_copy_string(lsm.u.disable.channel_name, channel_name,
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;
}
/*
- * Enable channel per domain
- * Returns size of returned session payload data or a negative error code.
+ * 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);
+}
+
+/*
+ * Enable channel per domain
+ * Returns size of returned session payload data or a negative error code.
*/
int lttng_enable_channel(struct lttng_handle *handle,
struct lttng_channel *chan)
{
struct lttcomm_session_msg lsm;
- /*
- * NULL arguments are forbidden. No default values.
- */
+ /* NULL arguments are forbidden. No default values. */
if (handle == NULL || chan == NULL) {
return -LTTNG_ERR_INVALID;
}
}
/*
- * All tracing will be stopped for registered events of the channel.
- * Returns size of returned session payload data or a negative error code.
+ * All tracing will be stopped for registered events of the channel.
+ * Returns size of returned session payload data or a negative error code.
*/
int lttng_disable_channel(struct lttng_handle *handle, const char *name)
{
struct lttcomm_session_msg lsm;
- /* Safety check. Both are mandatory */
+ /* Safety check. Both are mandatory. */
if (handle == NULL || name == NULL) {
return -LTTNG_ERR_INVALID;
}
}
/*
- * Lists all available tracepoints of domain.
- * Sets the contents of the events array.
- * Returns the number of lttng_event entries in events;
- * on error, returns a negative value.
+ * 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.
+ * Returns the number of lttng_event entries in events;
+ * on error, returns a negative value.
*/
int lttng_list_tracepoints(struct lttng_handle *handle,
struct lttng_event **events)
return -LTTNG_ERR_INVALID;
}
+ memset(&lsm, 0, sizeof(lsm));
lsm.cmd_type = LTTNG_LIST_TRACEPOINTS;
lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
}
/*
- * Lists all available tracepoint fields of domain.
- * Sets the contents of the event field array.
- * Returns the number of lttng_event_field entries in events;
- * on error, returns a negative value.
+ * Lists all available tracepoint fields of domain.
+ * Sets the contents of the event field array.
+ * Returns the number of lttng_event_field entries in events;
+ * on error, returns a negative value.
*/
int lttng_list_tracepoint_fields(struct lttng_handle *handle,
struct lttng_event_field **fields)
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);
}
/*
- * Returns a human readable string describing
- * the error code (a negative value).
+ * 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).
*/
const char *lttng_strerror(int code)
{
}
/*
- * Destroy session using name.
- * Returns size of returned session payload data or a negative error code.
+ * Destroy session using name.
+ * Returns size of returned session payload data or a negative error code.
*/
int lttng_destroy_session(const char *session_name)
{
return -LTTNG_ERR_INVALID;
}
+ memset(&lsm, 0, sizeof(lsm));
lsm.cmd_type = LTTNG_DESTROY_SESSION;
lttng_ctl_copy_string(lsm.session.name, session_name,
}
/*
- * Ask the session daemon for all available sessions.
- * Sets the contents of the sessions array.
- * Returns the number of lttng_session entries in sessions;
- * on error, returns a negative value.
+ * Ask the session daemon for all available sessions.
+ * Sets the contents of the sessions array.
+ * Returns the number of lttng_session entries in sessions;
+ * on error, returns a negative value.
*/
int lttng_list_sessions(struct lttng_session **sessions)
{
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.
- * Returns the number of lttng_domain entries in domains;
- * on error, returns a negative value.
+ * Ask the session daemon for all available domains of a session.
+ * Sets the contents of the domains array.
+ * Returns the number of lttng_domain entries in domains;
+ * on error, returns a negative value.
*/
int lttng_list_domains(const char *session_name,
struct lttng_domain **domains)
return -LTTNG_ERR_INVALID;
}
+ memset(&lsm, 0, sizeof(lsm));
lsm.cmd_type = LTTNG_LIST_DOMAINS;
lttng_ctl_copy_string(lsm.session.name, session_name,
}
/*
- * Ask the session daemon for all available channels of a session.
- * Sets the contents of the channels array.
- * Returns the number of lttng_channel entries in channels;
- * on error, returns a negative value.
+ * Ask the session daemon for all available channels of a session.
+ * Sets the contents of the channels array.
+ * Returns the number of lttng_channel entries in channels;
+ * on error, returns a negative value.
*/
int lttng_list_channels(struct lttng_handle *handle,
struct lttng_channel **channels)
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));
}
/*
- * Ask the session daemon for all available events of a session channel.
- * Sets the contents of the events array.
- * Returns the number of lttng_event entries in events;
- * on error, returns a negative value.
+ * Ask the session daemon for all available events of a session channel.
+ * 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_events(struct lttng_handle *handle,
const char *channel_name, struct lttng_event **events)
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);
switch (domain->type) {
case LTTNG_DOMAIN_KERNEL:
- attr->switch_timer_interval = DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER;
+ attr->switch_timer_interval =
+ DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER;
attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER;
attr->subbuf_size = default_get_kernel_channel_subbuf_size();
attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM;
attr->subbuf_size = default_get_ust_uid_channel_subbuf_size();
attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM;
attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT;
- attr->switch_timer_interval = DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER;
- attr->read_timer_interval = DEFAULT_UST_UID_CHANNEL_READ_TIMER;
+ attr->switch_timer_interval =
+ DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER;
+ attr->read_timer_interval =
+ DEFAULT_UST_UID_CHANNEL_READ_TIMER;
break;
case LTTNG_BUFFER_PER_PID:
default:
attr->subbuf_size = default_get_ust_pid_channel_subbuf_size();
attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM;
attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT;
- attr->switch_timer_interval = DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER;
- attr->read_timer_interval = DEFAULT_UST_PID_CHANNEL_READ_TIMER;
+ attr->switch_timer_interval =
+ DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER;
+ attr->read_timer_interval =
+ DEFAULT_UST_PID_CHANNEL_READ_TIMER;
break;
}
default:
ret = set_session_daemon_path();
if (ret < 0) {
- /* Error */
+ /* Error. */
return ret;
}
if (*sessiond_sock_path == '\0') {
/*
- * No socket path set. Weird error which means the constructor was not
- * called.
+ * No socket path set. Weird error which means the constructor
+ * was not called.
*/
assert(0);
}
ret = try_connect_sessiond(sessiond_sock_path);
if (ret < 0) {
- /* Not alive */
+ /* Not alive. */
return 0;
}
- /* Is alive */
+ /* Is alive. */
return 1;
}
return -ENOSYS;
}
-/*
- * Set health socket path by putting it in the global health_sock_path
- * variable.
- *
- * Returns 0 on success or assert(0) on ENOMEM.
- */
-static int set_health_socket_path(void)
-{
- int in_tgroup = 0; /* In tracing group */
- uid_t uid;
- const char *home;
-
- uid = getuid();
-
- if (uid != 0) {
- /* Are we in the tracing group ? */
- in_tgroup = check_tracing_group(tracing_group);
- }
-
- if ((uid == 0) || in_tgroup) {
- lttng_ctl_copy_string(health_sock_path,
- DEFAULT_GLOBAL_HEALTH_UNIX_SOCK, sizeof(health_sock_path));
- }
-
- if (uid != 0) {
- int ret;
-
- /*
- * With GNU C < 2.1, snprintf returns -1 if the target buffer is too small;
- * With GNU C >= 2.1, snprintf returns the required size (excluding closing null)
- */
- home = utils_get_home_dir();
- if (home == NULL) {
- /* Fallback in /tmp .. */
- home = "/tmp";
- }
-
- ret = snprintf(health_sock_path, sizeof(health_sock_path),
- DEFAULT_HOME_HEALTH_UNIX_SOCK, home);
- if ((ret < 0) || (ret >= sizeof(health_sock_path))) {
- /* ENOMEM at this point... just kill the control lib. */
- assert(0);
- }
- }
-
- return 0;
-}
-
-/*
- * Check session daemon health for a specific health component.
- *
- * Return 0 if health is OK or else 1 if BAD.
- *
- * Any other negative value is a lttng error code which can be translated with
- * lttng_strerror().
- */
-int lttng_health_check(enum lttng_health_component c)
-{
- int sock, ret;
- struct lttcomm_health_msg msg;
- struct lttcomm_health_data reply;
-
- /* Connect to the sesssion daemon */
- sock = lttcomm_connect_unix_sock(health_sock_path);
- if (sock < 0) {
- ret = -LTTNG_ERR_NO_SESSIOND;
- goto error;
- }
-
- msg.cmd = LTTNG_HEALTH_CHECK;
- msg.component = c;
-
- ret = lttcomm_send_unix_sock(sock, (void *)&msg, sizeof(msg));
- if (ret < 0) {
- ret = -LTTNG_ERR_FATAL;
- goto close_error;
- }
-
- ret = lttcomm_recv_unix_sock(sock, (void *)&reply, sizeof(reply));
- if (ret < 0) {
- ret = -LTTNG_ERR_FATAL;
- goto close_error;
- }
-
- ret = reply.ret_code;
-
-close_error:
- {
- int closeret;
-
- closeret = close(sock);
- assert(!closeret);
- }
-
-error:
- return ret;
-}
-
/*
* This is an extension of create session that is ONLY and SHOULD only be used
* by the lttng command line program. It exists to avoid using URI parsing in
struct lttcomm_session_msg lsm;
struct lttng_uri *uris = NULL;
- if (name == NULL || datetime == NULL || url == NULL) {
+ if (name == NULL || datetime == NULL) {
return -LTTNG_ERR_INVALID;
}
lsm.cmd_type = LTTNG_CREATE_SESSION;
lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name));
- /* There should never be a data URL */
+ /* There should never be a data URL. */
size = uri_parse_str_urls(url, NULL, &uris);
if (size < 0) {
ret = -LTTNG_ERR_INVALID;
{
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);
+ 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;
+ }
- /*
- * 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 = (int) *pending;
+end:
+ free(pending);
+ return ret;
+}
+
+/*
+ * Create a session exclusively used for snapshot.
+ *
+ * Returns LTTNG_OK on success or a negative error code.
+ */
+int lttng_create_session_snapshot(const char *name, const char *snapshot_url)
+{
+ int ret;
+ ssize_t size;
+ struct lttcomm_session_msg lsm;
+ struct lttng_uri *uris = NULL;
+
+ if (name == NULL) {
+ return -LTTNG_ERR_INVALID;
+ }
+
+ memset(&lsm, 0, sizeof(lsm));
+
+ lsm.cmd_type = LTTNG_CREATE_SESSION_SNAPSHOT;
+ lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name));
+
+ size = uri_parse_str_urls(snapshot_url, NULL, &uris);
+ if (size < 0) {
+ return -LTTNG_ERR_INVALID;
}
+ lsm.u.uri.size = size;
+
+ ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris,
+ sizeof(struct lttng_uri) * size, NULL);
+
+ free(uris);
+ return ret;
+}
+
+/*
+ * Create a session exclusively used for live.
+ *
+ * Returns LTTNG_OK on success or a negative error code.
+ */
+int lttng_create_session_live(const char *name, const char *url,
+ unsigned int timer_interval)
+{
+ int ret;
+ ssize_t size;
+ struct lttcomm_session_msg lsm;
+ struct lttng_uri *uris = NULL;
+
+ if (name == NULL || timer_interval == 0) {
+ return -LTTNG_ERR_INVALID;
+ }
+
+ memset(&lsm, 0, sizeof(lsm));
+
+ lsm.cmd_type = LTTNG_CREATE_SESSION_LIVE;
+ lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name));
+
+ 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;
+ }
+ } else {
+ size = 0;
+ }
+
+ lsm.u.session_live.nb_uri = size;
+ lsm.u.session_live.timer_interval = timer_interval;
+
+ ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris,
+ sizeof(struct lttng_uri) * size, NULL);
+
+end:
+ free(uris);
return ret;
}
/*
- * lib constructor
+ * 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.
*/
static void __attribute__((constructor)) init()
{
/* Set default session group */
lttng_set_tracing_group(DEFAULT_TRACING_GROUP);
- /* Set socket for health check */
- (void) set_health_socket_path();
}
/*
- * lib destructor
+ * lib destructor.
*/
static void __attribute__((destructor)) lttng_ctl_exit()
{
projects / lttng-tools.git / blobdiff