Fix: add lttng rcu wrapper to allow tracing RCU

[deliverable/lttng-modules.git] / probes / lttng-events.h

diff --git a/probes/lttng-events.h b/probes/lttng-events.h
index e6d8f4477dfab459d744e92be27db55c20a96cea..58f4e1200d860f6b01294e6a1b6f341300cb1d09 100644 (file)
--- a/probes/lttng-events.h
+++ b/probes/lttng-events.h
@@ -27,6 +27,7 @@
 #include "lttng-probe-user.h"
 #include "../wrapper/vmalloc.h"        /* for wrapper_vmalloc_sync_all() */
 #include "../wrapper/ringbuffer/frontend_types.h"
+#include "../wrapper/rcu.h"
 #include "../lttng-events.h"
 #include "../lttng-tracer-core.h"
 
@@ -138,6 +139,40 @@ void trace_##_name(void);
 
 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 
+/*
+ * Stage 1.1 of the trace events.
+ *
+ * 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_template_proto___##_template(_proto);
+
+#undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS
+#define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \
+void __event_template_proto___##_template(void);
+
+#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE
+#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _fields) \
+void __event_template_proto___##_name(_proto);
+
+#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS
+#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _fields) \
+void __event_template_proto___##_name(void);
+
+#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+
 /*
  * Stage 2 of the trace events.
  *
@@ -694,7 +729,7 @@ static void __event_probe__##_name(void *__data, _proto)                  \
                return;                                                       \
        if (unlikely(!ACCESS_ONCE(__event->enabled)))                         \
                return;                                                       \
-       __lpf = rcu_dereference(__session->pid_tracker);                      \
+       __lpf = lttng_rcu_dereference(__session->pid_tracker);                \
        if (__lpf && likely(!lttng_pid_tracker_lookup(__lpf, current->pid)))  \
                return;                                                       \
        _code                                                                 \
@@ -704,7 +739,7 @@ static void __event_probe__##_name(void *__data, _proto)                  \
                                                                              \
                __event_prepare_filter_stack__##_name(__stackvar.__filter_stack_data, \
                                tp_locvar, _args);                                    \
-               list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \
+               lttng_list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \
                        if (unlikely(bc_runtime->filter(bc_runtime,           \
                                        __stackvar.__filter_stack_data) & LTTNG_FILTER_RECORD_FLAG)) \
                                __filter_record = 1;                          \
@@ -753,7 +788,7 @@ static void __event_probe__##_name(void *__data)                          \
                return;                                                       \
        if (unlikely(!ACCESS_ONCE(__event->enabled)))                         \
                return;                                                       \
-       __lpf = rcu_dereference(__session->pid_tracker);                      \
+       __lpf = lttng_rcu_dereference(__session->pid_tracker);                \
        if (__lpf && likely(!lttng_pid_tracker_lookup(__lpf, current->pid)))  \
                return;                                                       \
        _code                                                                 \
@@ -763,7 +798,7 @@ static void __event_probe__##_name(void *__data)                          \
                                                                              \
                __event_prepare_filter_stack__##_name(__stackvar.__filter_stack_data, \
                                tp_locvar);                                   \
-               list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \
+               lttng_list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \
                        if (unlikely(bc_runtime->filter(bc_runtime,           \
                                        __stackvar.__filter_stack_data) & LTTNG_FILTER_RECORD_FLAG)) \
                                __filter_record = 1;                          \