#include <stdlib.h>
#include <lttng/tracepoint-types.h>
#include <lttng/tracepoint-rcu.h>
+#include <lttng/ust-utils.h>
+#include <sys/types.h>
+#include <unistd.h>
+
#include <urcu/compiler.h>
#include <urcu/system.h>
#include <dlfcn.h> /* for dlopen */
#include <string.h> /* for memset */
+#include <stdbool.h>
#include <lttng/ust-config.h> /* for sdt */
#include <lttng/ust-compiler.h>
#include <lttng/ust-tracer.h>
#include <lttng/ust-api-compat.h>
+#if (defined(__cplusplus) && (__cplusplus <= 199711L))
+#error "C++11 support is required to build tracepoints and providers as C++"
+#endif
+
#define LTTNG_UST_TRACEPOINT_NAME_LEN_MAX 256
#ifdef LTTNG_UST_HAVE_SDT_INTEGRATION
}
#endif
+/*
+ * Use getenv() directly and bypass lttng-ust helper functions
+ * because we may not have access to lttng-ust shared libraries.
+ */
+#ifdef LTTNG_UST_DEBUG
+static inline
+bool lttng_ust_tracepoint_logging_debug_enabled(void)
+{
+ return true;
+}
+#else /* #ifdef LTTNG_UST_DEBUG */
+static inline
+bool lttng_ust_tracepoint_logging_debug_enabled(void)
+{
+ return getenv("LTTNG_UST_DEBUG");
+}
+#endif /* #ifdef LTTNG_UST_DEBUG */
+
+#ifdef LTTNG_UST_ABORT_ON_CRITICAL
+static inline
+bool lttng_ust_tracepoint_logging_abort_on_critical_enabled(void)
+{
+ return true;
+}
+#else /* #ifdef LTTNG_UST_ABORT_ON_CRITICAL */
+static inline
+bool lttng_ust_tracepoint_logging_abort_on_critical_enabled(void)
+{
+ return getenv("LTTNG_UST_ABORT_ON_CRITICAL");
+}
+#endif
+
+#define LTTNG_UST_TRACEPOINT_THIS_IP \
+ ({ __label__ here; here: &&here; })
+
+static void
+lttng_ust_tracepoints_print_disabled_message(void)
+{
+ if (lttng_ust_tracepoint_logging_debug_enabled())
+ fprintf(stderr, "lttng-ust-tracepoint [%ld]: Critical: dlopen() failed to find '%s', tracepoints in this binary won't be registered. "
+ "(at addr=%p in %s() at " __FILE__ ":" lttng_ust_stringify(__LINE__) ")\n",
+ (long) getpid(),
+ LTTNG_UST_TRACEPOINT_LIB_SONAME,
+ LTTNG_UST_TRACEPOINT_THIS_IP,
+ __func__);
+ if (lttng_ust_tracepoint_logging_abort_on_critical_enabled())
+ abort();
+}
+
static void
lttng_ust__tracepoints__init(void)
lttng_ust_notrace __attribute__((constructor));
if (!lttng_ust_tracepoint_dlopen_ptr->liblttngust_handle)
lttng_ust_tracepoint_dlopen_ptr->liblttngust_handle =
dlopen(LTTNG_UST_TRACEPOINT_LIB_SONAME, RTLD_NOW | RTLD_GLOBAL);
- if (!lttng_ust_tracepoint_dlopen_ptr->liblttngust_handle)
+ if (!lttng_ust_tracepoint_dlopen_ptr->liblttngust_handle) {
+ lttng_ust_tracepoints_print_disabled_message();
return;
+ }
lttng_ust_tracepoint__init_urcu_sym();
}
if (!lttng_ust_tracepoint_dlopen_ptr->liblttngust_handle)
lttng_ust_tracepoint_dlopen_ptr->liblttngust_handle =
dlopen(LTTNG_UST_TRACEPOINT_LIB_SONAME, RTLD_NOW | RTLD_GLOBAL);
- if (!lttng_ust_tracepoint_dlopen_ptr->liblttngust_handle)
+ if (!lttng_ust_tracepoint_dlopen_ptr->liblttngust_handle) {
+ lttng_ust_tracepoints_print_disabled_message();
return;
+ }
if (!lttng_ust_tracepoint_destructors_syms_ptr)
lttng_ust_tracepoint_destructors_syms_ptr = <tng_ust_tracepoint_destructors_syms;
lttng_ust_tracepoint_dlopen_ptr->lttng_ust_tracepoint_module_register =
#define LTTNG_UST_TRACEPOINT_EVENT_CLASS(provider, name, args, fields)
-#define LTTNG_UST_TRACEPOINT_EVENT_INSTANCE(provider, _template, name, args) \
+#define LTTNG_UST_TRACEPOINT_EVENT_INSTANCE(template_provider, template_name, provider, name, args) \
LTTNG_UST__DECLARE_TRACEPOINT(provider, name, LTTNG_UST__TP_PARAMS(args)) \
LTTNG_UST__DEFINE_TRACEPOINT(provider, name, LTTNG_UST__TP_PARAMS(args))
#if LTTNG_UST_COMPAT_API(0)
#define TRACEPOINT_EVENT LTTNG_UST_TRACEPOINT_EVENT
#define TRACEPOINT_EVENT_CLASS LTTNG_UST_TRACEPOINT_EVENT_CLASS
-#define TRACEPOINT_EVENT_INSTANCE LTTNG_UST_TRACEPOINT_EVENT_INSTANCE
+#define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, args) \
+ LTTNG_UST_TRACEPOINT_EVENT_INSTANCE(_provider, _template, \
+ _provider, _name, LTTNG_UST__TP_PARAMS(args))
+
#endif /* #if LTTNG_UST_COMPAT_API(0) */
#endif /* #ifndef LTTNG_UST_TRACEPOINT_EVENT */