#include <assert.h>
+/*
+ * By default, LTTng-UST uses the priority 150 for the tracepoint and probe
+ * provider constructors to trace tracepoints located within
+ * constructors/destructors with a higher priority value within the same
+ * module. This priority can be overridden by the application.
+ */
+#ifndef LTTNG_UST_CONSTRUCTOR_PRIO
+#define LTTNG_UST_CONSTRUCTOR_PRIO 150
+#endif
+
#define lttng_ust_notrace __attribute__((no_instrument_function))
/*
* g++ 4.8 and prior do not support C99 compound literals. Therefore,
* force allocating those on the heap with these C++ compilers.
*/
-#if defined (__cplusplus) && defined (__GNUC__) && \
- (__GNUC__ < 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ <= 8))
+#if defined (__cplusplus) && !defined (__clang__) && defined (__GNUC__) && \
+ ((__GNUC__ < 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ <= 8)))
# ifndef LTTNG_UST_ALLOCATE_COMPOUND_LITERAL_ON_HEAP
# define LTTNG_UST_ALLOCATE_COMPOUND_LITERAL_ON_HEAP
# endif
#ifdef __cplusplus
#define lttng_ust_static_assert(predicate, msg, c_identifier_msg) \
static_assert(predicate, msg)
-#elif __STDC_VERSION__ >= 201112L
+#elif defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L)
#define lttng_ust_static_assert(predicate, msg, c_identifier_msg) \
_Static_assert(predicate, msg)
#else
/*
* Evaluates the predicate and emit a compilation error on failure.
*
- * If the predicate evaluates to true, this macro emits a typedef of an array
- * of size 0.
+ * If the predicate evaluates to true, this macro emits a function
+ * prototype with an argument type which is an array of size 0.
*
- * If the predicate evaluates to false, this macro emits a typedef of an array
- * of negative size which is invalid in C and forces a compiler error. The msg
- * parameter is used in the tentative typedef so it is printed to the user.
+ * If the predicate evaluates to false, this macro emits a function
+ * prototype with an argument type which is an array of negative size
+ * which is invalid in C and forces a compiler error. The
+ * c_identifier_msg parameter is used as the argument identifier so it
+ * is printed to the user when the error is reported.
*/
#define lttng_ust_static_assert(predicate, msg, c_identifier_msg) \
- typedef char lttng_ust_static_assert_##c_identifier_msg[2*!!(predicate)-1]
+ void lttng_ust_static_assert_proto(char c_identifier_msg[2*!!(predicate)-1])
+#endif
+
+/* Combine two tokens. */
+#define LTTNG_UST_COMPILER__COMBINE_TOKENS(_tokena, _tokenb) \
+ _tokena##_tokenb
+#define LTTNG_UST_COMPILER_COMBINE_TOKENS(_tokena, _tokenb) \
+ LTTNG_UST_COMPILER__COMBINE_TOKENS(_tokena, _tokenb)
+/*
+ * Wrap constructor and destructor functions to invoke them as functions with
+ * the constructor/destructor GNU C attributes, which ensures that those
+ * constructors/destructors are ordered before/after C++
+ * constructors/destructors.
+ *
+ * Wrap constructor and destructor functions as the constructor/destructor of a
+ * variable defined within an anonymous namespace when building as C++ with
+ * LTTNG_UST_ALLOCATE_COMPOUND_LITERAL_ON_HEAP defined. With this option,
+ * there are no guarantees that the events in C++ constructors/destructors will
+ * be traced.
+ */
+#if defined (__cplusplus) && defined (LTTNG_UST_ALLOCATE_COMPOUND_LITERAL_ON_HEAP)
+#define LTTNG_UST_DECLARE_CONSTRUCTOR_DESTRUCTOR(name, constructor_func, \
+ destructor_func, ...) \
+namespace lttng { \
+namespace ust { \
+namespace details { \
+class LTTNG_UST_COMPILER_COMBINE_TOKENS(lttng_ust_constructor_destructor_, \
+ name) { \
+public: \
+ LTTNG_UST_COMPILER_COMBINE_TOKENS(lttng_ust_constructor_destructor_, name)() __VA_ARGS__; \
+ ~LTTNG_UST_COMPILER_COMBINE_TOKENS(lttng_ust_constructor_destructor_, name)() __VA_ARGS__; \
+}; \
+LTTNG_UST_COMPILER_COMBINE_TOKENS(lttng_ust_constructor_destructor_, name)::LTTNG_UST_COMPILER_COMBINE_TOKENS(lttng_ust_constructor_destructor_, name)() \
+{ \
+ constructor_func(); \
+} \
+LTTNG_UST_COMPILER_COMBINE_TOKENS(lttng_ust_constructor_destructor_, name)::~LTTNG_UST_COMPILER_COMBINE_TOKENS(lttng_ust_constructor_destructor_, name)() \
+{ \
+ destructor_func(); \
+} \
+} \
+} \
+} \
+ \
+namespace { \
+const lttng::ust::details::LTTNG_UST_COMPILER_COMBINE_TOKENS( \
+ lttng_ust_constructor_destructor_, name) \
+ LTTNG_UST_COMPILER_COMBINE_TOKENS(name, registration_instance); \
+}
+#else
+#define LTTNG_UST_DECLARE_CONSTRUCTOR_DESTRUCTOR(name, constructor_func, \
+ destructor_func, ...) \
+ static void LTTNG_UST_COMPILER_COMBINE_TOKENS(lttng_ust_constructor_, name)(void) \
+ __attribute__((constructor(LTTNG_UST_CONSTRUCTOR_PRIO))) __VA_ARGS__; \
+ static void LTTNG_UST_COMPILER_COMBINE_TOKENS(lttng_ust_constructor_, name)(void) \
+ { \
+ constructor_func(); \
+ } \
+ static void LTTNG_UST_COMPILER_COMBINE_TOKENS(lttng_ust_destructor_, name)(void) \
+ __attribute__((destructor(LTTNG_UST_CONSTRUCTOR_PRIO))) __VA_ARGS__; \
+ static void LTTNG_UST_COMPILER_COMBINE_TOKENS(lttng_ust_destructor_, name)(void) \
+ { \
+ destructor_func(); \
+ }
#endif
#endif /* _LTTNG_UST_COMPILER_H */