#include <asm/byteorder.h>
#include <linux/swab.h>
-#include <lttng/types.h>
-#include <lttng/probe-user.h>
#include <wrapper/vmalloc.h> /* for wrapper_vmalloc_sync_mappings() */
#include <ringbuffer/frontend_types.h>
#include <ringbuffer/backend.h>
#include <wrapper/rcu.h>
#include <wrapper/user_namespace.h>
-#include <lttng-events.h>
-#include <lttng-tracer-core.h>
-#include <lttng-tp-mempool.h>
+#include <lttng/types.h>
+#include <lttng/probe-user.h>
+#include <lttng/events.h>
+#include <lttng/tracer-core.h>
+#include <lttng/tp-mempool.h>
#define __LTTNG_NULL_STRING "(null)"
#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
*
#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE
#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \
-static void __event_probe__##_name(void *__data, _proto);
+static void __event_probe__##_name(void *__data, _proto); \
+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_probe__##_name(void *__data);
+static void __event_probe__##_name(void *__data); \
+static void __event_notifier_probe__##_name(void *__data);
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
#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; \
- struct lttng_session *__session = __chan->session; \
+ struct lttng_event_container *__container = __event->container; \
+ struct lttng_session *__session = __container->session; \
struct lib_ring_buffer_ctx __ctx; \
- ssize_t __event_len; \
- size_t __event_align; \
size_t __orig_dynamic_len_offset, __dynamic_len_idx __attribute__((unused)); \
union { \
size_t __dynamic_len_removed[ARRAY_SIZE(__event_fields___##_name)]; \
\
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(__container->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; \
} \
if (likely(!__filter_record)) \
goto __post; \
} \
- __event_len = __event_get_size__##_name(tp_locvar, _args); \
- if (unlikely(__event_len < 0)) { \
- lib_ring_buffer_lost_event_too_big(__chan->chan); \
- goto __post; \
+ switch (__container->type) { \
+ case LTTNG_EVENT_CONTAINER_CHANNEL: \
+ { \
+ struct lttng_channel *__chan = lttng_event_container_get_channel(__container); \
+ ssize_t __event_len; \
+ size_t __event_align; \
+ \
+ __event_len = __event_get_size__##_name(tp_locvar, _args); \
+ if (unlikely(__event_len < 0)) { \
+ lib_ring_buffer_lost_event_too_big(__chan->chan); \
+ goto __post; \
+ } \
+ __event_align = __event_get_align__##_name(tp_locvar, _args); \
+ lib_ring_buffer_ctx_init(&__ctx, __chan->chan, &__lttng_probe_ctx, __event_len, \
+ __event_align, -1); \
+ __ret = __chan->ops->event_reserve(&__ctx, __event->id); \
+ if (__ret < 0) \
+ goto __post; \
+ _fields \
+ __chan->ops->event_commit(&__ctx); \
+ break; \
+ } \
+ case LTTNG_EVENT_CONTAINER_COUNTER: \
+ { \
+ struct lttng_counter *__counter = lttng_event_container_get_counter(__container); \
+ size_t __index = __event->id; \
+ \
+ (void) __counter->ops->counter_add(__counter->counter, &__index, 1); \
+ break; \
+ } \
} \
- __event_align = __event_get_align__##_name(tp_locvar, _args); \
- lib_ring_buffer_ctx_init(&__ctx, __chan->chan, &__lttng_probe_ctx, __event_len, \
- __event_align, -1); \
- __ret = __chan->ops->event_reserve(&__ctx, __event->id); \
- if (__ret < 0) \
- goto __post; \
- _fields \
- __chan->ops->event_commit(&__ctx); \
__post: \
_code_post \
barrier(); /* use before un-reserve. */ \
{ \
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; \
- struct lttng_session *__session = __chan->session; \
- struct lib_ring_buffer_ctx __ctx; \
- ssize_t __event_len; \
- size_t __event_align; \
+ struct lttng_event_container *__container = __event->container; \
+ struct lttng_session *__session = __container->session; \
size_t __orig_dynamic_len_offset, __dynamic_len_idx __attribute__((unused)); \
union { \
size_t __dynamic_len_removed[ARRAY_SIZE(__event_fields___##_name)]; \
\
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(__container->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; \
} \
if (likely(!__filter_record)) \
goto __post; \
} \
- __event_len = __event_get_size__##_name(tp_locvar); \
- if (unlikely(__event_len < 0)) { \
- lib_ring_buffer_lost_event_too_big(__chan->chan); \
- goto __post; \
+ switch (__container->type) { \
+ case LTTNG_EVENT_CONTAINER_CHANNEL: \
+ { \
+ struct lttng_channel *__chan = lttng_event_container_get_channel(__container); \
+ struct lib_ring_buffer_ctx __ctx; \
+ ssize_t __event_len; \
+ size_t __event_align; \
+ \
+ __event_len = __event_get_size__##_name(tp_locvar); \
+ if (unlikely(__event_len < 0)) { \
+ lib_ring_buffer_lost_event_too_big(__chan->chan); \
+ goto __post; \
+ } \
+ __event_align = __event_get_align__##_name(tp_locvar); \
+ lib_ring_buffer_ctx_init(&__ctx, __chan->chan, &__lttng_probe_ctx, __event_len, \
+ __event_align, -1); \
+ __ret = __chan->ops->event_reserve(&__ctx, __event->id); \
+ if (__ret < 0) \
+ goto __post; \
+ _fields \
+ __chan->ops->event_commit(&__ctx); \
+ break; \
+ } \
+ case LTTNG_EVENT_CONTAINER_COUNTER: \
+ { \
+ struct lttng_counter *__counter = lttng_event_container_get_counter(__container); \
+ size_t __index = __event->id; \
+ \
+ (void) __counter->ops->counter_add(__counter->counter, &__index, 1); \
+ break; \
+ } \
} \
- __event_align = __event_get_align__##_name(tp_locvar); \
- lib_ring_buffer_ctx_init(&__ctx, __chan->chan, &__lttng_probe_ctx, __event_len, \
- __event_align, -1); \
- __ret = __chan->ops->event_reserve(&__ctx, __event->id); \
- if (__ret < 0) \
- goto __post; \
- _fields \
- __chan->ops->event_commit(&__ctx); \
__post: \
_code_post \
barrier(); /* use before un-reserve. */ \
#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; \
+ struct lttng_kernel_notifier_ctx __notif_ctx; \
+ bool __interpreter_stack_prepared = false; \
+ \
+ 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); \
+ __interpreter_stack_prepared = true; \
+ 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; \
+ } \
+ \
+ __notif_ctx.eval_capture = LTTNG_READ_ONCE(__event_notifier->eval_capture); \
+ if (unlikely(!__interpreter_stack_prepared && __notif_ctx.eval_capture)) \
+ __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, \
+ &__notif_ctx); \
+ \
+__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; \
+ struct lttng_kernel_notifier_ctx __notif_ctx; \
+ bool __interpreter_stack_prepared = false; \
+ \
+ 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); \
+ __interpreter_stack_prepared = true; \
+ 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; \
+ } \
+ \
+ __notif_ctx.eval_capture = LTTNG_READ_ONCE(__event_notifier->eval_capture); \
+ if (unlikely(!__interpreter_stack_prepared && __notif_ctx.eval_capture)) \
+ __event_prepare_interpreter_stack__##_name( \
+ __stackvar.__interpreter_stack_data, \
+ tp_locvar); \
+ \
+ __event_notifier->send_notification(__event_notifier, \
+ &__lttng_probe_ctx, \
+ __stackvar.__interpreter_stack_data, \
+ &__notif_ctx); \
+__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 / deliverable / lttng-modules.git / blobdiff