#include <linux/ftrace_event.h>
+/*
+ * DECLARE_EVENT_CLASS can be used to add a generic function
+ * handlers for events. That is, if all events have the same
+ * parameters and just have distinct trace points.
+ * Each tracepoint can be defined with DEFINE_EVENT and that
+ * will map the DECLARE_EVENT_CLASS to the tracepoint.
+ *
+ * TRACE_EVENT is a one to one mapping between tracepoint and template.
+ */
+#undef TRACE_EVENT
+#define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
+ DECLARE_EVENT_CLASS(name, \
+ PARAMS(proto), \
+ PARAMS(args), \
+ PARAMS(tstruct), \
+ PARAMS(assign), \
+ PARAMS(print)); \
+ DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args));
+
+
#undef __field
#define __field(type, item) type item;
+#undef __field_ext
+#define __field_ext(type, item, filter_type) type item;
+
#undef __array
#define __array(type, item, len) type item[len];
#undef __dynamic_array
-#define __dynamic_array(type, item, len) unsigned short __data_loc_##item;
+#define __dynamic_array(type, item, len) u32 __data_loc_##item;
#undef __string
#define __string(item, src) __dynamic_array(char, item, -1)
#undef TP_STRUCT__entry
#define TP_STRUCT__entry(args...) args
-#undef TRACE_EVENT
-#define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
- struct ftrace_raw_##name { \
- struct trace_entry ent; \
- tstruct \
- char __data[0]; \
- }; \
- static struct ftrace_event_call event_##name
+#undef DECLARE_EVENT_CLASS
+#define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) \
+ struct ftrace_raw_##name { \
+ struct trace_entry ent; \
+ tstruct \
+ char __data[0]; \
+ };
+#undef DEFINE_EVENT
+#define DEFINE_EVENT(template, name, proto, args) \
+ static struct ftrace_event_call \
+ __attribute__((__aligned__(4))) event_##name
+
+#undef DEFINE_EVENT_PRINT
+#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
+ DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
+
+#undef __cpparg
+#define __cpparg(arg...) arg
+
+/* Callbacks are meaningless to ftrace. */
+#undef TRACE_EVENT_FN
+#define TRACE_EVENT_FN(name, proto, args, tstruct, \
+ assign, print, reg, unreg) \
+ TRACE_EVENT(name, __cpparg(proto), __cpparg(args), \
+ __cpparg(tstruct), __cpparg(assign), __cpparg(print)) \
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
* Include the following:
*
* struct ftrace_data_offsets_<call> {
- * int <item1>;
- * int <item2>;
+ * u32 <item1>;
+ * u32 <item2>;
* [...]
* };
*
- * The __dynamic_array() macro will create each int <item>, this is
+ * The __dynamic_array() macro will create each u32 <item>, this is
* to keep the offset of each array from the beginning of the event.
+ * The size of an array is also encoded, in the higher 16 bits of <item>.
*/
#undef __field
-#define __field(type, item);
+#define __field(type, item)
+
+#undef __field_ext
+#define __field_ext(type, item, filter_type)
#undef __array
#define __array(type, item, len)
#undef __dynamic_array
-#define __dynamic_array(type, item, len) int item;
+#define __dynamic_array(type, item, len) u32 item;
#undef __string
#define __string(item, src) __dynamic_array(char, item, -1)
-#undef TRACE_EVENT
-#define TRACE_EVENT(call, proto, args, tstruct, assign, print) \
+#undef DECLARE_EVENT_CLASS
+#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
struct ftrace_data_offsets_##call { \
tstruct; \
};
+#undef DEFINE_EVENT
+#define DEFINE_EVENT(template, name, proto, args)
+
+#undef DEFINE_EVENT_PRINT
+#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
+ DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
+
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
/*
* field = (typeof(field))entry;
*
* p = get_cpu_var(ftrace_event_seq);
+ * trace_seq_init(p);
* ret = trace_seq_printf(s, <TP_printk> "\n");
* put_cpu();
* if (!ret)
#undef __get_dynamic_array
#define __get_dynamic_array(field) \
- ((void *)__entry + __entry->__data_loc_##field)
+ ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
#undef __get_str
#define __get_str(field) (char *)__get_dynamic_array(field)
#undef __print_flags
#define __print_flags(flag, delim, flag_array...) \
({ \
- static const struct trace_print_flags flags[] = \
+ static const struct trace_print_flags __flags[] = \
{ flag_array, { -1, NULL }}; \
- ftrace_print_flags_seq(p, delim, flag, flags); \
+ ftrace_print_flags_seq(p, delim, flag, __flags); \
})
#undef __print_symbolic
ftrace_print_symbols_seq(p, value, symbols); \
})
-#undef TRACE_EVENT
-#define TRACE_EVENT(call, proto, args, tstruct, assign, print) \
-enum print_line_t \
-ftrace_raw_output_##call(struct trace_iterator *iter, int flags) \
+#undef DECLARE_EVENT_CLASS
+#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
+static notrace enum print_line_t \
+ftrace_raw_output_id_##call(int event_id, const char *name, \
+ struct trace_iterator *iter, int flags) \
{ \
struct trace_seq *s = &iter->seq; \
struct ftrace_raw_##call *field; \
\
entry = iter->ent; \
\
- if (entry->type != event_##call.id) { \
+ if (entry->type != event_id) { \
WARN_ON_ONCE(1); \
return TRACE_TYPE_UNHANDLED; \
} \
field = (typeof(field))entry; \
\
p = &get_cpu_var(ftrace_event_seq); \
- ret = trace_seq_printf(s, #call ": " print); \
+ trace_seq_init(p); \
+ ret = trace_seq_printf(s, "%s: ", name); \
+ if (ret) \
+ ret = trace_seq_printf(s, print); \
put_cpu(); \
if (!ret) \
return TRACE_TYPE_PARTIAL_LINE; \
\
return TRACE_TYPE_HANDLED; \
}
-
-#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
-/*
- * Setup the showing format of trace point.
- *
- * int
- * ftrace_format_##call(struct trace_seq *s)
- * {
- * struct ftrace_raw_##call field;
- * int ret;
- *
- * ret = trace_seq_printf(s, #type " " #item ";"
- * " offset:%u; size:%u;\n",
- * offsetof(struct ftrace_raw_##call, item),
- * sizeof(field.type));
- *
- * }
- */
-
-#undef TP_STRUCT__entry
-#define TP_STRUCT__entry(args...) args
-
-#undef __field
-#define __field(type, item) \
- ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \
- "offset:%u;\tsize:%u;\n", \
- (unsigned int)offsetof(typeof(field), item), \
- (unsigned int)sizeof(field.item)); \
- if (!ret) \
- return 0;
-
-#undef __array
-#define __array(type, item, len) \
- ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t" \
- "offset:%u;\tsize:%u;\n", \
- (unsigned int)offsetof(typeof(field), item), \
- (unsigned int)sizeof(field.item)); \
- if (!ret) \
- return 0;
-
-#undef __dynamic_array
-#define __dynamic_array(type, item, len) \
- ret = trace_seq_printf(s, "\tfield:__data_loc " #item ";\t" \
- "offset:%u;\tsize:%u;\n", \
- (unsigned int)offsetof(typeof(field), \
- __data_loc_##item), \
- (unsigned int)sizeof(field.__data_loc_##item)); \
- if (!ret) \
- return 0;
-
-#undef __string
-#define __string(item, src) __dynamic_array(char, item, -1)
-
-#undef __entry
-#define __entry REC
-
-#undef TP_printk
-#define TP_printk(fmt, args...) "%s, %s\n", #fmt, __stringify(args)
-
-#undef TP_fast_assign
-#define TP_fast_assign(args...) args
+#undef DEFINE_EVENT
+#define DEFINE_EVENT(template, name, proto, args) \
+static notrace enum print_line_t \
+ftrace_raw_output_##name(struct trace_iterator *iter, int flags) \
+{ \
+ return ftrace_raw_output_id_##template(event_##name.id, \
+ #name, iter, flags); \
+}
-#undef TRACE_EVENT
-#define TRACE_EVENT(call, proto, args, tstruct, func, print) \
-static int \
-ftrace_format_##call(struct trace_seq *s) \
+#undef DEFINE_EVENT_PRINT
+#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
+static notrace enum print_line_t \
+ftrace_raw_output_##call(struct trace_iterator *iter, int flags) \
{ \
- struct ftrace_raw_##call field __attribute__((unused)); \
- int ret = 0; \
+ struct trace_seq *s = &iter->seq; \
+ struct ftrace_raw_##template *field; \
+ struct trace_entry *entry; \
+ struct trace_seq *p; \
+ int ret; \
\
- tstruct; \
+ entry = iter->ent; \
\
- trace_seq_printf(s, "\nprint fmt: " print); \
+ if (entry->type != event_##call.id) { \
+ WARN_ON_ONCE(1); \
+ return TRACE_TYPE_UNHANDLED; \
+ } \
\
- return ret; \
+ field = (typeof(field))entry; \
+ \
+ p = &get_cpu_var(ftrace_event_seq); \
+ trace_seq_init(p); \
+ ret = trace_seq_printf(s, "%s: ", #call); \
+ if (ret) \
+ ret = trace_seq_printf(s, print); \
+ put_cpu(); \
+ if (!ret) \
+ return TRACE_TYPE_PARTIAL_LINE; \
+ \
+ return TRACE_TYPE_HANDLED; \
}
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
-#undef __field
-#define __field(type, item) \
+#undef __field_ext
+#define __field_ext(type, item, filter_type) \
ret = trace_define_field(event_call, #type, #item, \
offsetof(typeof(field), item), \
- sizeof(field.item), is_signed_type(type)); \
+ sizeof(field.item), \
+ is_signed_type(type), filter_type); \
if (ret) \
return ret;
+#undef __field
+#define __field(type, item) __field_ext(type, item, FILTER_OTHER)
+
#undef __array
#define __array(type, item, len) \
BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
ret = trace_define_field(event_call, #type "[" #len "]", #item, \
offsetof(typeof(field), item), \
- sizeof(field.item), 0); \
+ sizeof(field.item), \
+ is_signed_type(type), FILTER_OTHER); \
if (ret) \
return ret;
#undef __dynamic_array
#define __dynamic_array(type, item, len) \
- ret = trace_define_field(event_call, "__data_loc" "[" #type "]", #item,\
- offsetof(typeof(field), __data_loc_##item), \
- sizeof(field.__data_loc_##item), 0);
+ ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \
+ offsetof(typeof(field), __data_loc_##item), \
+ sizeof(field.__data_loc_##item), \
+ is_signed_type(type), FILTER_OTHER);
#undef __string
#define __string(item, src) __dynamic_array(char, item, -1)
-#undef TRACE_EVENT
-#define TRACE_EVENT(call, proto, args, tstruct, func, print) \
-int \
-ftrace_define_fields_##call(void) \
+#undef DECLARE_EVENT_CLASS
+#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \
+static int notrace \
+ftrace_define_fields_##call(struct ftrace_event_call *event_call) \
{ \
struct ftrace_raw_##call field; \
- struct ftrace_event_call *event_call = &event_##call; \
int ret; \
\
- __common_field(int, type, 1); \
- __common_field(unsigned char, flags, 0); \
- __common_field(unsigned char, preempt_count, 0); \
- __common_field(int, pid, 1); \
- __common_field(int, tgid, 1); \
- \
tstruct; \
\
return ret; \
}
+#undef DEFINE_EVENT
+#define DEFINE_EVENT(template, name, proto, args)
+
+#undef DEFINE_EVENT_PRINT
+#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
+ DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
+
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
/*
#undef __field
#define __field(type, item)
+#undef __field_ext
+#define __field_ext(type, item, filter_type)
+
#undef __array
#define __array(type, item, len)
#define __dynamic_array(type, item, len) \
__data_offsets->item = __data_size + \
offsetof(typeof(*entry), __data); \
+ __data_offsets->item |= (len * sizeof(type)) << 16; \
__data_size += (len) * sizeof(type);
#undef __string
-#define __string(item, src) __dynamic_array(char, item, strlen(src) + 1) \
+#define __string(item, src) __dynamic_array(char, item, strlen(src) + 1)
-#undef TRACE_EVENT
-#define TRACE_EVENT(call, proto, args, tstruct, assign, print) \
-static inline int ftrace_get_offsets_##call( \
+#undef DECLARE_EVENT_CLASS
+#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
+static inline notrace int ftrace_get_offsets_##call( \
struct ftrace_data_offsets_##call *__data_offsets, proto) \
{ \
int __data_size = 0; \
return __data_size; \
}
+#undef DEFINE_EVENT
+#define DEFINE_EVENT(template, name, proto, args)
+
+#undef DEFINE_EVENT_PRINT
+#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
+ DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
+
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+#ifdef CONFIG_PERF_EVENTS
+
+/*
+ * Generate the functions needed for tracepoint perf_event support.
+ *
+ * NOTE: The insertion profile callback (ftrace_profile_<call>) is defined later
+ *
+ * static int ftrace_profile_enable_<call>(void)
+ * {
+ * return register_trace_<call>(ftrace_profile_<call>);
+ * }
+ *
+ * static void ftrace_profile_disable_<call>(void)
+ * {
+ * unregister_trace_<call>(ftrace_profile_<call>);
+ * }
+ *
+ */
+
+#undef DECLARE_EVENT_CLASS
+#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)
+
+#undef DEFINE_EVENT
+#define DEFINE_EVENT(template, name, proto, args) \
+ \
+static void perf_trace_##name(proto); \
+ \
+static notrace int \
+perf_trace_enable_##name(struct ftrace_event_call *unused) \
+{ \
+ return register_trace_##name(perf_trace_##name); \
+} \
+ \
+static notrace void \
+perf_trace_disable_##name(struct ftrace_event_call *unused) \
+{ \
+ unregister_trace_##name(perf_trace_##name); \
+}
+
+#undef DEFINE_EVENT_PRINT
+#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
+ DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
+
+#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+
+#endif /* CONFIG_PERF_EVENTS */
+
/*
* Stage 4 of the trace events.
*
* event_trace_printk(_RET_IP_, "<call>: " <fmt>);
* }
*
- * static int ftrace_reg_event_<call>(void)
+ * static int ftrace_reg_event_<call>(struct ftrace_event_call *unused)
* {
- * int ret;
- *
- * ret = register_trace_<call>(ftrace_event_<call>);
- * if (!ret)
- * pr_info("event trace: Could not activate trace point "
- * "probe to <call>");
- * return ret;
+ * return register_trace_<call>(ftrace_event_<call>);
* }
*
- * static void ftrace_unreg_event_<call>(void)
+ * static void ftrace_unreg_event_<call>(struct ftrace_event_call *unused)
* {
* unregister_trace_<call>(ftrace_event_<call>);
* }
* {
* struct ring_buffer_event *event;
* struct ftrace_raw_<call> *entry; <-- defined in stage 1
+ * struct ring_buffer *buffer;
* unsigned long irq_flags;
* int pc;
*
* local_save_flags(irq_flags);
* pc = preempt_count();
*
- * event = trace_current_buffer_lock_reserve(event_<call>.id,
+ * event = trace_current_buffer_lock_reserve(&buffer,
+ * event_<call>.id,
* sizeof(struct ftrace_raw_<call>),
* irq_flags, pc);
* if (!event)
* <assign>; <-- Here we assign the entries by the __field and
* __array macros.
*
- * trace_current_buffer_unlock_commit(event, irq_flags, pc);
+ * trace_current_buffer_unlock_commit(buffer, event, irq_flags, pc);
* }
*
- * static int ftrace_raw_reg_event_<call>(void)
+ * static int ftrace_raw_reg_event_<call>(struct ftrace_event_call *unused)
* {
* int ret;
*
* return ret;
* }
*
- * static void ftrace_unreg_event_<call>(void)
+ * static void ftrace_unreg_event_<call>(struct ftrace_event_call *unused)
* {
* unregister_trace_<call>(ftrace_raw_event_<call>);
* }
* .trace = ftrace_raw_output_<call>, <-- stage 2
* };
*
- * static int ftrace_raw_init_event_<call>(void)
- * {
- * int id;
- *
- * id = register_ftrace_event(&ftrace_event_type_<call>);
- * if (!id)
- * return -ENODEV;
- * event_<call>.id = id;
- * return 0;
- * }
- *
* static struct ftrace_event_call __used
* __attribute__((__aligned__(4)))
* __attribute__((section("_ftrace_events"))) event_<call> = {
* .name = "<call>",
* .system = "<system>",
- * .raw_init = ftrace_raw_init_event_<call>,
+ * .raw_init = trace_event_raw_init,
* .regfunc = ftrace_reg_event_<call>,
* .unregfunc = ftrace_unreg_event_<call>,
- * .show_format = ftrace_format_<call>,
* }
*
*/
-#undef TP_FMT
-#define TP_FMT(fmt, args...) fmt "\n", ##args
-
-#ifdef CONFIG_EVENT_PROFILE
-#define _TRACE_PROFILE(call, proto, args) \
-static void ftrace_profile_##call(proto) \
-{ \
- extern void perf_tpcounter_event(int); \
- perf_tpcounter_event(event_##call.id); \
-} \
- \
-static int ftrace_profile_enable_##call(struct ftrace_event_call *event_call) \
-{ \
- int ret = 0; \
- \
- if (!atomic_inc_return(&event_call->profile_count)) \
- ret = register_trace_##call(ftrace_profile_##call); \
- \
- return ret; \
-} \
- \
-static void ftrace_profile_disable_##call(struct ftrace_event_call *event_call)\
-{ \
- if (atomic_add_negative(-1, &event_call->profile_count)) \
- unregister_trace_##call(ftrace_profile_##call); \
-}
+#ifdef CONFIG_PERF_EVENTS
-#define _TRACE_PROFILE_INIT(call) \
- .profile_count = ATOMIC_INIT(-1), \
- .profile_enable = ftrace_profile_enable_##call, \
- .profile_disable = ftrace_profile_disable_##call,
+#define _TRACE_PERF_INIT(call) \
+ .perf_event_enable = perf_trace_enable_##call, \
+ .perf_event_disable = perf_trace_disable_##call,
#else
-#define _TRACE_PROFILE(call, proto, args)
-#define _TRACE_PROFILE_INIT(call)
-#endif
+#define _TRACE_PERF_INIT(call)
+#endif /* CONFIG_PERF_EVENTS */
#undef __entry
#define __entry entry
#define __assign_str(dst, src) \
strcpy(__get_str(dst), src);
-#undef TRACE_EVENT
-#define TRACE_EVENT(call, proto, args, tstruct, assign, print) \
-_TRACE_PROFILE(call, PARAMS(proto), PARAMS(args)) \
- \
-static struct ftrace_event_call event_##call; \
+#undef TP_fast_assign
+#define TP_fast_assign(args...) args
+
+#undef TP_perf_assign
+#define TP_perf_assign(args...)
+
+#undef DECLARE_EVENT_CLASS
+#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
\
-static void ftrace_raw_event_##call(proto) \
+static notrace void \
+ftrace_raw_event_id_##call(struct ftrace_event_call *event_call, \
+ proto) \
{ \
struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
- struct ftrace_event_call *event_call = &event_##call; \
struct ring_buffer_event *event; \
struct ftrace_raw_##call *entry; \
+ struct ring_buffer *buffer; \
unsigned long irq_flags; \
int __data_size; \
int pc; \
\
__data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
\
- event = trace_current_buffer_lock_reserve(event_##call.id, \
+ event = trace_current_buffer_lock_reserve(&buffer, \
+ event_call->id, \
sizeof(*entry) + __data_size, \
irq_flags, pc); \
if (!event) \
\
{ assign; } \
\
- if (!filter_current_check_discard(event_call, entry, event)) \
- trace_nowake_buffer_unlock_commit(event, irq_flags, pc); \
-} \
+ if (!filter_current_check_discard(buffer, event_call, entry, event)) \
+ trace_nowake_buffer_unlock_commit(buffer, \
+ event, irq_flags, pc); \
+}
+
+#undef DEFINE_EVENT
+#define DEFINE_EVENT(template, call, proto, args) \
\
-static int ftrace_raw_reg_event_##call(void) \
+static notrace void ftrace_raw_event_##call(proto) \
{ \
- int ret; \
+ ftrace_raw_event_id_##template(&event_##call, args); \
+} \
\
- ret = register_trace_##call(ftrace_raw_event_##call); \
- if (ret) \
- pr_info("event trace: Could not activate trace point " \
- "probe to " #call "\n"); \
- return ret; \
+static notrace int \
+ftrace_raw_reg_event_##call(struct ftrace_event_call *unused) \
+{ \
+ return register_trace_##call(ftrace_raw_event_##call); \
} \
\
-static void ftrace_raw_unreg_event_##call(void) \
+static notrace void \
+ftrace_raw_unreg_event_##call(struct ftrace_event_call *unused) \
{ \
unregister_trace_##call(ftrace_raw_event_##call); \
} \
\
static struct trace_event ftrace_event_type_##call = { \
.trace = ftrace_raw_output_##call, \
-}; \
+};
+
+#undef DEFINE_EVENT_PRINT
+#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
+ DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
+
+#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+
+#undef __entry
+#define __entry REC
+
+#undef __print_flags
+#undef __print_symbolic
+#undef __get_dynamic_array
+#undef __get_str
+
+#undef TP_printk
+#define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args)
+
+#undef DECLARE_EVENT_CLASS
+#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
+static const char print_fmt_##call[] = print;
+
+#undef DEFINE_EVENT
+#define DEFINE_EVENT(template, call, proto, args) \
\
-static int ftrace_raw_init_event_##call(void) \
-{ \
- int id; \
- \
- id = register_ftrace_event(&ftrace_event_type_##call); \
- if (!id) \
- return -ENODEV; \
- event_##call.id = id; \
- INIT_LIST_HEAD(&event_##call.fields); \
- init_preds(&event_##call); \
- return 0; \
-} \
+static struct ftrace_event_call __used \
+__attribute__((__aligned__(4))) \
+__attribute__((section("_ftrace_events"))) event_##call = { \
+ .name = #call, \
+ .system = __stringify(TRACE_SYSTEM), \
+ .event = &ftrace_event_type_##call, \
+ .raw_init = trace_event_raw_init, \
+ .regfunc = ftrace_raw_reg_event_##call, \
+ .unregfunc = ftrace_raw_unreg_event_##call, \
+ .print_fmt = print_fmt_##template, \
+ .define_fields = ftrace_define_fields_##template, \
+ _TRACE_PERF_INIT(call) \
+}
+
+#undef DEFINE_EVENT_PRINT
+#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
+ \
+static const char print_fmt_##call[] = print; \
\
static struct ftrace_event_call __used \
__attribute__((__aligned__(4))) \
.name = #call, \
.system = __stringify(TRACE_SYSTEM), \
.event = &ftrace_event_type_##call, \
- .raw_init = ftrace_raw_init_event_##call, \
+ .raw_init = trace_event_raw_init, \
.regfunc = ftrace_raw_reg_event_##call, \
.unregfunc = ftrace_raw_unreg_event_##call, \
- .show_format = ftrace_format_##call, \
- .define_fields = ftrace_define_fields_##call, \
- _TRACE_PROFILE_INIT(call) \
+ .print_fmt = print_fmt_##call, \
+ .define_fields = ftrace_define_fields_##template, \
+ _TRACE_PERF_INIT(call) \
+}
+
+#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+
+/*
+ * Define the insertion callback to perf events
+ *
+ * The job is very similar to ftrace_raw_event_<call> except that we don't
+ * insert in the ring buffer but in a perf counter.
+ *
+ * static void ftrace_perf_<call>(proto)
+ * {
+ * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
+ * struct ftrace_event_call *event_call = &event_<call>;
+ * extern void perf_tp_event(int, u64, u64, void *, int);
+ * struct ftrace_raw_##call *entry;
+ * struct perf_trace_buf *trace_buf;
+ * u64 __addr = 0, __count = 1;
+ * unsigned long irq_flags;
+ * struct trace_entry *ent;
+ * int __entry_size;
+ * int __data_size;
+ * int __cpu
+ * int pc;
+ *
+ * pc = preempt_count();
+ *
+ * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
+ *
+ * // Below we want to get the aligned size by taking into account
+ * // the u32 field that will later store the buffer size
+ * __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),
+ * sizeof(u64));
+ * __entry_size -= sizeof(u32);
+ *
+ * // Protect the non nmi buffer
+ * // This also protects the rcu read side
+ * local_irq_save(irq_flags);
+ * __cpu = smp_processor_id();
+ *
+ * if (in_nmi())
+ * trace_buf = rcu_dereference_sched(perf_trace_buf_nmi);
+ * else
+ * trace_buf = rcu_dereference_sched(perf_trace_buf);
+ *
+ * if (!trace_buf)
+ * goto end;
+ *
+ * trace_buf = per_cpu_ptr(trace_buf, __cpu);
+ *
+ * // Avoid recursion from perf that could mess up the buffer
+ * if (trace_buf->recursion++)
+ * goto end_recursion;
+ *
+ * raw_data = trace_buf->buf;
+ *
+ * // Make recursion update visible before entering perf_tp_event
+ * // so that we protect from perf recursions.
+ *
+ * barrier();
+ *
+ * //zero dead bytes from alignment to avoid stack leak to userspace:
+ * *(u64 *)(&raw_data[__entry_size - sizeof(u64)]) = 0ULL;
+ * entry = (struct ftrace_raw_<call> *)raw_data;
+ * ent = &entry->ent;
+ * tracing_generic_entry_update(ent, irq_flags, pc);
+ * ent->type = event_call->id;
+ *
+ * <tstruct> <- do some jobs with dynamic arrays
+ *
+ * <assign> <- affect our values
+ *
+ * perf_tp_event(event_call->id, __addr, __count, entry,
+ * __entry_size); <- submit them to perf counter
+ *
+ * }
+ */
+
+#ifdef CONFIG_PERF_EVENTS
+
+#undef __entry
+#define __entry entry
+
+#undef __get_dynamic_array
+#define __get_dynamic_array(field) \
+ ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
+
+#undef __get_str
+#define __get_str(field) (char *)__get_dynamic_array(field)
+
+#undef __perf_addr
+#define __perf_addr(a) __addr = (a)
+
+#undef __perf_count
+#define __perf_count(c) __count = (c)
+
+#undef DECLARE_EVENT_CLASS
+#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
+static notrace void \
+perf_trace_templ_##call(struct ftrace_event_call *event_call, \
+ proto) \
+{ \
+ struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
+ struct ftrace_raw_##call *entry; \
+ u64 __addr = 0, __count = 1; \
+ unsigned long irq_flags; \
+ struct pt_regs *__regs; \
+ int __entry_size; \
+ int __data_size; \
+ int rctx; \
+ \
+ __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
+ __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
+ sizeof(u64)); \
+ __entry_size -= sizeof(u32); \
+ \
+ if (WARN_ONCE(__entry_size > PERF_MAX_TRACE_SIZE, \
+ "profile buffer not large enough")) \
+ return; \
+ entry = (struct ftrace_raw_##call *)perf_trace_buf_prepare( \
+ __entry_size, event_call->id, &rctx, &irq_flags); \
+ if (!entry) \
+ return; \
+ tstruct \
+ \
+ { assign; } \
+ \
+ __regs = &__get_cpu_var(perf_trace_regs); \
+ perf_fetch_caller_regs(__regs, 2); \
+ \
+ perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \
+ __count, irq_flags, __regs); \
}
+#undef DEFINE_EVENT
+#define DEFINE_EVENT(template, call, proto, args) \
+static notrace void perf_trace_##call(proto) \
+{ \
+ struct ftrace_event_call *event_call = &event_##call; \
+ \
+ perf_trace_templ_##template(event_call, args); \
+}
+
+#undef DEFINE_EVENT_PRINT
+#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
+ DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
+
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+#endif /* CONFIG_PERF_EVENTS */
-#undef _TRACE_PROFILE
#undef _TRACE_PROFILE_INIT
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff