#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+/*
+ * Stage 1.2 of the trace event_notifier.
+ *
+ * Create dummy trace prototypes for each event class, and for each used
+ * template. This will allow checking whether the prototypes from the
+ * class and the instance using the class actually match.
+ */
+
+#include <lttng/events-reset.h> /* Reset all macros within TRACE_EVENT */
+
+#undef TP_PROTO
+#define TP_PROTO(...) __VA_ARGS__
+
+#undef TP_ARGS
+#define TP_ARGS(...) __VA_ARGS__
+
+#undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP
+#define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \
+void __event_notifier_template_proto___##_template(_proto);
+
+#undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS
+#define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \
+void __event_notifier_template_proto___##_template(void);
+
+#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE
+#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \
+void __event_notifier_template_proto___##_name(_proto);
+
+#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS
+#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \
+void __event_notifier_template_proto___##_name(void);
+
+#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+
+
/*
* Stage 1.2 of tracepoint event generation
*
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+/*
+ * Stage 3.1 of the trace event_notifiers.
+ *
+ * Create event_notifier probe callback prototypes.
+ */
+
+/* Reset all macros within TRACEPOINT_EVENT */
+#include <lttng/events-reset.h>
+
+#undef TP_PROTO
+#define TP_PROTO(...) __VA_ARGS__
+
+#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE
+#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \
+static void __event_notifier_probe__##_name(void *__data, _proto);
+
+#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS
+#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \
+static void __event_notifier_probe__##_name(void *__data);
+
+#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+
/*
* Stage 4 of the trace events.
*
#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS
#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \
static inline \
-void __event_prepare_filter_stack__##_name(char *__stack_data, \
+void __event_prepare_interpreter_stack__##_name(char *__stack_data, \
void *__tp_locvar) \
{ \
struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \
#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE
#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \
static inline \
-void __event_prepare_filter_stack__##_name(char *__stack_data, \
+void __event_prepare_interpreter_stack__##_name(char *__stack_data, \
void *__tp_locvar, _proto) \
{ \
struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \
{ \
struct probe_local_vars { _locvar }; \
struct lttng_event *__event = __data; \
- struct lttng_probe_ctx __lttng_probe_ctx = { \
+ struct lttng_probe_ctx __lttng_probe_ctx = { \
.event = __event, \
+ .event_notifier = NULL, \
.interruptible = !irqs_disabled(), \
}; \
struct lttng_channel *__chan = __event->chan; \
\
if (!_TP_SESSION_CHECK(session, __session)) \
return; \
- if (unlikely(!READ_ONCE(__session->active))) \
+ if (unlikely(!LTTNG_READ_ONCE(__session->active))) \
return; \
- if (unlikely(!READ_ONCE(__chan->enabled))) \
+ if (unlikely(!LTTNG_READ_ONCE(__chan->enabled))) \
return; \
- if (unlikely(!READ_ONCE(__event->enabled))) \
+ if (unlikely(!LTTNG_READ_ONCE(__event->enabled))) \
return; \
__lf = lttng_rcu_dereference(__session->pid_tracker.p); \
if (__lf && likely(!lttng_id_tracker_lookup(__lf, current->tgid))) \
__orig_dynamic_len_offset = this_cpu_ptr(<tng_dynamic_len_stack)->offset; \
__dynamic_len_idx = __orig_dynamic_len_offset; \
_code_pre \
- if (unlikely(!list_empty(&__event->bytecode_runtime_head))) { \
+ if (unlikely(!list_empty(&__event->filter_bytecode_runtime_head))) { \
struct lttng_bytecode_runtime *bc_runtime; \
int __filter_record = __event->has_enablers_without_bytecode; \
\
- __event_prepare_filter_stack__##_name(__stackvar.__filter_stack_data, \
+ __event_prepare_interpreter_stack__##_name(__stackvar.__filter_stack_data, \
tp_locvar, _args); \
- lttng_list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \
- if (unlikely(bc_runtime->filter(bc_runtime, &__lttng_probe_ctx, \
- __stackvar.__filter_stack_data) & LTTNG_FILTER_RECORD_FLAG)) { \
+ lttng_list_for_each_entry_rcu(bc_runtime, &__event->filter_bytecode_runtime_head, node) { \
+ if (unlikely(bc_runtime->interpreter_funcs.filter(bc_runtime, &__lttng_probe_ctx, \
+ __stackvar.__filter_stack_data) & LTTNG_INTERPRETER_RECORD_FLAG)) { \
__filter_record = 1; \
break; \
} \
{ \
struct probe_local_vars { _locvar }; \
struct lttng_event *__event = __data; \
- struct lttng_probe_ctx __lttng_probe_ctx = { \
+ struct lttng_probe_ctx __lttng_probe_ctx = { \
.event = __event, \
+ .event_notifier = NULL, \
.interruptible = !irqs_disabled(), \
}; \
struct lttng_channel *__chan = __event->chan; \
\
if (!_TP_SESSION_CHECK(session, __session)) \
return; \
- if (unlikely(!READ_ONCE(__session->active))) \
+ if (unlikely(!LTTNG_READ_ONCE(__session->active))) \
return; \
- if (unlikely(!READ_ONCE(__chan->enabled))) \
+ if (unlikely(!LTTNG_READ_ONCE(__chan->enabled))) \
return; \
- if (unlikely(!READ_ONCE(__event->enabled))) \
+ if (unlikely(!LTTNG_READ_ONCE(__event->enabled))) \
return; \
__lf = lttng_rcu_dereference(__session->pid_tracker.p); \
if (__lf && likely(!lttng_id_tracker_lookup(__lf, current->tgid))) \
__orig_dynamic_len_offset = this_cpu_ptr(<tng_dynamic_len_stack)->offset; \
__dynamic_len_idx = __orig_dynamic_len_offset; \
_code_pre \
- if (unlikely(!list_empty(&__event->bytecode_runtime_head))) { \
+ if (unlikely(!list_empty(&__event->filter_bytecode_runtime_head))) { \
struct lttng_bytecode_runtime *bc_runtime; \
int __filter_record = __event->has_enablers_without_bytecode; \
\
- __event_prepare_filter_stack__##_name(__stackvar.__filter_stack_data, \
+ __event_prepare_interpreter_stack__##_name(__stackvar.__filter_stack_data, \
tp_locvar); \
- lttng_list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \
- if (unlikely(bc_runtime->filter(bc_runtime, &__lttng_probe_ctx, \
- __stackvar.__filter_stack_data) & LTTNG_FILTER_RECORD_FLAG)) { \
+ lttng_list_for_each_entry_rcu(bc_runtime, &__event->filter_bytecode_runtime_head, node) { \
+ if (unlikely(bc_runtime->interpreter_funcs.filter(bc_runtime, &__lttng_probe_ctx, \
+ __stackvar.__filter_stack_data) & LTTNG_INTERPRETER_RECORD_FLAG)) { \
__filter_record = 1; \
break; \
} \
#undef __get_dynamic_len
+/*
+ * Stage 6.1 of tracepoint generation: generate event notifier probes
+ *
+ * Create the probe function. This function evaluates the filter bytecode and
+ * queue a notification to be sent to userspace.
+ */
+
+#include <lttng/events-reset.h> /* Reset all macros within LTTNG_TRACEPOINT_EVENT */
+
+#undef TP_PROTO
+#define TP_PROTO(...) __VA_ARGS__
+
+#undef TP_ARGS
+#define TP_ARGS(...) __VA_ARGS__
+
+#undef TP_FIELDS
+#define TP_FIELDS(...) __VA_ARGS__
+
+#undef TP_locvar
+#define TP_locvar(...) __VA_ARGS__
+
+#undef TP_code_pre
+#define TP_code_pre(...) __VA_ARGS__
+
+#undef TP_code_post
+#define TP_code_post(...) __VA_ARGS__
+
+/*
+ * Using twice size for filter stack data to hold size and pointer for
+ * each field (worse case). For integers, max size required is 64-bit.
+ * Same for double-precision floats. Those fit within
+ * 2*sizeof(unsigned long) for all supported architectures.
+ * Perform UNION (||) of filter runtime list.
+ */
+#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE
+#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \
+static void __event_notifier_probe__##_name(void *__data, _proto) \
+{ \
+ struct probe_local_vars { _locvar }; \
+ struct lttng_event_notifier *__event_notifier = __data; \
+ struct lttng_probe_ctx __lttng_probe_ctx = { \
+ .event = NULL, \
+ .event_notifier = __event_notifier, \
+ .interruptible = !irqs_disabled(), \
+ }; \
+ union { \
+ size_t __dynamic_len_removed[ARRAY_SIZE(__event_fields___##_name)]; \
+ char __interpreter_stack_data[2 * sizeof(unsigned long) * ARRAY_SIZE(__event_fields___##_name)]; \
+ } __stackvar; \
+ struct probe_local_vars __tp_locvar; \
+ struct probe_local_vars *tp_locvar __attribute__((unused)) = \
+ &__tp_locvar; \
+ \
+ if (unlikely(!READ_ONCE(__event_notifier->enabled))) \
+ return; \
+ _code_pre \
+ if (unlikely(!list_empty(&__event_notifier->filter_bytecode_runtime_head))) { \
+ struct lttng_bytecode_runtime *bc_runtime; \
+ int __filter_record = __event_notifier->has_enablers_without_bytecode; \
+ \
+ __event_prepare_interpreter_stack__##_name(__stackvar.__interpreter_stack_data, \
+ tp_locvar, _args); \
+ lttng_list_for_each_entry_rcu(bc_runtime, &__event_notifier->filter_bytecode_runtime_head, node) { \
+ if (unlikely(bc_runtime->interpreter_funcs.filter(bc_runtime, &__lttng_probe_ctx, \
+ __stackvar.__interpreter_stack_data) & LTTNG_INTERPRETER_RECORD_FLAG)) \
+ __filter_record = 1; \
+ } \
+ if (likely(!__filter_record)) \
+ goto __post; \
+ } \
+ \
+ if (unlikely(!list_empty(&__event_notifier->capture_bytecode_runtime_head))) \
+ __event_prepare_interpreter_stack__##_name( \
+ __stackvar.__interpreter_stack_data, \
+ tp_locvar, _args); \
+ \
+ __event_notifier->send_notification(__event_notifier, \
+ &__lttng_probe_ctx, \
+ __stackvar.__interpreter_stack_data); \
+ \
+__post: \
+ _code_post \
+ return; \
+}
+
+#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS
+#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \
+static void __event_notifier_probe__##_name(void *__data) \
+{ \
+ struct probe_local_vars { _locvar }; \
+ struct lttng_event_notifier *__event_notifier = __data; \
+ struct lttng_probe_ctx __lttng_probe_ctx = { \
+ .event = NULL, \
+ .event_notifier = __event_notifier, \
+ .interruptible = !irqs_disabled(), \
+ }; \
+ union { \
+ size_t __dynamic_len_removed[ARRAY_SIZE(__event_fields___##_name)]; \
+ char __interpreter_stack_data[2 * sizeof(unsigned long) * ARRAY_SIZE(__event_fields___##_name)]; \
+ } __stackvar; \
+ struct probe_local_vars __tp_locvar; \
+ struct probe_local_vars *tp_locvar __attribute__((unused)) = \
+ &__tp_locvar; \
+ \
+ if (unlikely(!READ_ONCE(__event_notifier->enabled))) \
+ return; \
+ _code_pre \
+ if (unlikely(!list_empty(&__event_notifier->filter_bytecode_runtime_head))) { \
+ struct lttng_bytecode_runtime *bc_runtime; \
+ int __filter_record = __event_notifier->has_enablers_without_bytecode; \
+ \
+ __event_prepare_interpreter_stack__##_name(__stackvar.__interpreter_stack_data, \
+ tp_locvar); \
+ lttng_list_for_each_entry_rcu(bc_runtime, &__event_notifier->filter_bytecode_runtime_head, node) { \
+ if (unlikely(bc_runtime->interpreter_funcs.filter(bc_runtime, &__lttng_probe_ctx, \
+ __stackvar.__interpreter_stack_data) & LTTNG_INTERPRETER_RECORD_FLAG)) \
+ __filter_record = 1; \
+ } \
+ if (likely(!__filter_record)) \
+ goto __post; \
+ } \
+ \
+ if (unlikely(!list_empty(&__event_notifier->capture_bytecode_runtime_head))) \
+ __event_prepare_interpreter_stack__##_name( \
+ __stackvar.__interpreter_stack_data, \
+ tp_locvar); \
+ \
+ __event_notifier->send_notification(__event_notifier, \
+ &__lttng_probe_ctx, \
+ __stackvar.__interpreter_stack_data); \
+__post: \
+ _code_post \
+ return; \
+}
+
+#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
/*
* Stage 7 of the trace events.
*
#define TP_PROBE_CB(_template) &__event_probe__##_template
#endif
+#ifndef TP_EVENT_NOTIFIER_PROBE_CB
+#define TP_EVENT_NOTIFIER_PROBE_CB(_template) &__event_notifier_probe__##_template
+#endif
+
#undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS
#define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \
static const struct lttng_event_desc __event_desc___##_map = { \
.probe_callback = (void *) TP_PROBE_CB(_template), \
.nr_fields = ARRAY_SIZE(__event_fields___##_template), \
.owner = THIS_MODULE, \
+ .event_notifier_callback = (void *) TP_EVENT_NOTIFIER_PROBE_CB(_template), \
};
#undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP
projects / lttng-modules.git / blobdiff