X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fcommon%2Fdefaults.h;h=37d222a784fd0b3564a35b3a845fb8fe88b956e2;hb=93375aa60733caf9d30d45f4a0cff0c0394e46e9;hp=59fe8ec46054b9314e2284c87db5d1a0fa6fe5b9;hpb=7659d4907b24d257f56efb5d666f59a7434dcd3d;p=lttng-tools.git

diff --git a/src/common/defaults.h b/src/common/defaults.h
index 59fe8ec46..37d222a78 100644
--- a/src/common/defaults.h
+++ b/src/common/defaults.h
@@ -20,6 +20,7 @@
 #ifndef _DEFAULTS_H
 #define _DEFAULTS_H
 
+#include <pthread.h>
 #include <src/common/macros.h>
 
 /* Default unix group name for tracing. */
@@ -188,7 +189,7 @@
 #define DEFAULT_PYTHON_EVENT_COMPONENT    "lttng_python"
 #define DEFAULT_PYTHON_EVENT_NAME         DEFAULT_PYTHON_EVENT_COMPONENT ":*"
 
-#define DEFAULT_CHANNEL_OVERWRITE       0
+#define DEFAULT_CHANNEL_OVERWRITE       -1
 #define DEFAULT_CHANNEL_TRACEFILE_SIZE  CONFIG_DEFAULT_CHANNEL_TRACEFILE_SIZE
 #define DEFAULT_CHANNEL_TRACEFILE_COUNT CONFIG_DEFAULT_CHANNEL_TRACEFILE_COUNT
 
@@ -309,6 +310,9 @@
 /* Default LTTng MI XML namespace. */
 #define DEFAULT_LTTNG_MI_NAMESPACE		"http://lttng.org/xml/ns/lttng-mi"
 
+/* Default thread stack size; the default mandated by pthread_create(3) */
+#define DEFAULT_LTTNG_THREAD_STACK_SIZE		2097152
+
 /*
  * Returns the default subbuf size.
  *
@@ -354,4 +358,16 @@ size_t default_get_ust_pid_channel_subbuf_size(void);
 LTTNG_HIDDEN
 size_t default_get_ust_uid_channel_subbuf_size(void);
 
+/*
+ * Get the default pthread_attr to use on thread creation.
+ *
+ * Some libc, such as musl, don't honor the limit set for the stack size and use
+ * their own empirically chosen static value. This function checks if the
+ * current stack size is smaller than the stack size limit and if so returns a
+ * pthread_attr_t pointer where the thread stack size is set to the soft stack
+ * size limit.
+ */
+LTTNG_HIDDEN
+pthread_attr_t *default_pthread_attr(void);
+
 #endif /* _DEFAULTS_H */