Implement PID tracking for kernel tracing

[lttng-tools.git] / src / common / config / config.c

diff --git a/src/common/config/config.c b/src/common/config/config.c
index 971946c50bd93fbd8f9ef2ea9b2960c4b852d448..d84e38b9fa7b25b71de57bdc07ecb90997811b72 100644 (file)
--- a/src/common/config/config.c
+++ b/src/common/config/config.c
@@ -16,6 +16,7 @@
  */
 
 #define _GNU_SOURCE
+#define _LGPL_SOURCE
 #include <assert.h>
 #include <ctype.h>
 #include <stdio.h>
@@ -31,6 +32,7 @@
 #include <common/error.h>
 #include <common/macros.h>
 #include <common/utils.h>
+#include <common/compat/getenv.h>
 #include <lttng/lttng-error.h>
 #include <libxml/parser.h>
 #include <libxml/valid.h>
@@ -113,6 +115,8 @@ const char * const config_element_net_output = "net_output";
 const char * const config_element_control_uri = "control_uri";
 const char * const config_element_data_uri = "data_uri";
 const char * const config_element_max_size = "max_size";
+const char * const config_element_pid = "pid";
+const char * const config_element_pids = "pids";
 
 const char * const config_domain_type_kernel = "KERNEL";
 const char * const config_domain_type_ust = "UST";
@@ -594,7 +598,7 @@ static
 char *get_session_config_xsd_path()
 {
        char *xsd_path;
-       const char *base_path = getenv(DEFAULT_SESSION_CONFIG_XSD_PATH_ENV);
+       const char *base_path = lttng_secure_getenv(DEFAULT_SESSION_CONFIG_XSD_PATH_ENV);
        size_t base_path_len;
        size_t max_path_len;
 
@@ -1283,7 +1287,7 @@ int create_session(const char *name,
                int i;
                struct lttng_domain *domain;
                struct lttng_domain *domains[] =
-                       { kernel_domain, ust_domain, jul_domain, log4j_domain};
+                       { kernel_domain, ust_domain, jul_domain, log4j_domain };
 
                /* network destination */
                if (live_timer_interval && live_timer_interval != UINT64_MAX) {
@@ -1639,6 +1643,24 @@ int process_event_node(xmlNodePtr event_node, struct lttng_handle *handle,
 
        ret = lttng_enable_event_with_exclusions(handle, &event, channel_name,
                        filter_expression, exclusion_count, exclusions);
+       if (ret) {
+               goto end;
+       }
+
+       if (!event.enabled) {
+               /*
+                * Note that we should use lttng_disable_event_ext() (2.6+) to
+                * eliminate the risk of clashing on events of the same
+                * name (with different event types and loglevels).
+                *
+                * Unfortunately, lttng_disable_event_ext() only performs a
+                * match on the name and event type and errors out if any other
+                * event attribute is not set to its default value.
+                *
+                * This will disable all events that match this name.
+                */
+               ret = lttng_disable_event(handle, event.name, channel_name);
+       }
 end:
        for (i = 0; i < exclusion_count; i++) {
                free(exclusions[i]);