[RFC][PATCH 01/19] tracing: Rename trace/ftrace.h to trace/trace_events.h
From: Steven Rostedt
Date: Thu May 14 2015 - 11:20:13 EST
From: "Steven Rostedt (Red Hat)" <rostedt@xxxxxxxxxxx>
The name "ftrace" really refers to the function hook infrastructure. It
is not about the TRACE_EVENT() macros. The file trace/ftrace.h was originally
written to be mostly focused toward the "ftrace" code (that in kernel/trace/)
but ended up being generic and used by perf and others.
Rename the file to be less confusing about what infrastructure it belongs to.
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
---
include/trace/define_trace.h | 2 +-
include/trace/ftrace.h | 859 -------------------------------------------
include/trace/trace_events.h | 859 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 860 insertions(+), 860 deletions(-)
delete mode 100644 include/trace/ftrace.h
create mode 100644 include/trace/trace_events.h
diff --git a/include/trace/define_trace.h b/include/trace/define_trace.h
index 02e1003568a4..b13ba2fc76f7 100644
--- a/include/trace/define_trace.h
+++ b/include/trace/define_trace.h
@@ -87,7 +87,7 @@
#define DECLARE_TRACE(name, proto, args)
#ifdef CONFIG_EVENT_TRACING
-#include <trace/ftrace.h>
+#include <trace/trace_events.h>
#endif
#undef TRACE_EVENT
diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
deleted file mode 100644
index 37d4b10b111d..000000000000
--- a/include/trace/ftrace.h
+++ /dev/null
@@ -1,859 +0,0 @@
-/*
- * Stage 1 of the trace events.
- *
- * Override the macros in <trace/trace_events.h> to include the following:
- *
- * struct ftrace_raw_<call> {
- * struct trace_entry ent;
- * <type> <item>;
- * <type2> <item2>[<len>];
- * [...]
- * };
- *
- * The <type> <item> is created by the __field(type, item) macro or
- * the __array(type2, item2, len) macro.
- * We simply do "type item;", and that will create the fields
- * in the structure.
- */
-
-#include <linux/ftrace_event.h>
-
-#ifndef TRACE_SYSTEM_VAR
-#define TRACE_SYSTEM_VAR TRACE_SYSTEM
-#endif
-
-#define __app__(x, y) str__##x##y
-#define __app(x, y) __app__(x, y)
-
-#define TRACE_SYSTEM_STRING __app(TRACE_SYSTEM_VAR,__trace_system_name)
-
-#define TRACE_MAKE_SYSTEM_STR() \
- static const char TRACE_SYSTEM_STRING[] = \
- __stringify(TRACE_SYSTEM)
-
-TRACE_MAKE_SYSTEM_STR();
-
-#undef TRACE_DEFINE_ENUM
-#define TRACE_DEFINE_ENUM(a) \
- static struct trace_enum_map __used __initdata \
- __##TRACE_SYSTEM##_##a = \
- { \
- .system = TRACE_SYSTEM_STRING, \
- .enum_string = #a, \
- .enum_value = a \
- }; \
- static struct trace_enum_map __used \
- __attribute__((section("_ftrace_enum_map"))) \
- *TRACE_SYSTEM##_##a = &__##TRACE_SYSTEM##_##a
-
-/*
- * 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 __field_struct
-#define __field_struct(type, item) type item;
-
-#undef __field_struct_ext
-#define __field_struct_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) u32 __data_loc_##item;
-
-#undef __string
-#define __string(item, src) __dynamic_array(char, item, -1)
-
-#undef __bitmask
-#define __bitmask(item, nr_bits) __dynamic_array(char, item, -1)
-
-#undef TP_STRUCT__entry
-#define TP_STRUCT__entry(args...) args
-
-#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]; \
- }; \
- \
- static struct ftrace_event_class event_class_##name;
-
-#undef DEFINE_EVENT
-#define DEFINE_EVENT(template, name, proto, args) \
- static struct ftrace_event_call __used \
- __attribute__((__aligned__(4))) event_##name
-
-#undef DEFINE_EVENT_FN
-#define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg) \
- DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
-
-#undef DEFINE_EVENT_PRINT
-#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
- DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
-
-/* Callbacks are meaningless to ftrace. */
-#undef TRACE_EVENT_FN
-#define TRACE_EVENT_FN(name, proto, args, tstruct, \
- assign, print, reg, unreg) \
- TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \
- PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \
-
-#undef TRACE_EVENT_FLAGS
-#define TRACE_EVENT_FLAGS(name, value) \
- __TRACE_EVENT_FLAGS(name, value)
-
-#undef TRACE_EVENT_PERF_PERM
-#define TRACE_EVENT_PERF_PERM(name, expr...) \
- __TRACE_EVENT_PERF_PERM(name, expr)
-
-#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
-
-/*
- * Stage 2 of the trace events.
- *
- * Include the following:
- *
- * struct ftrace_data_offsets_<call> {
- * u32 <item1>;
- * u32 <item2>;
- * [...]
- * };
- *
- * 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 TRACE_DEFINE_ENUM
-#define TRACE_DEFINE_ENUM(a)
-
-#undef __field
-#define __field(type, item)
-
-#undef __field_ext
-#define __field_ext(type, item, filter_type)
-
-#undef __field_struct
-#define __field_struct(type, item)
-
-#undef __field_struct_ext
-#define __field_struct_ext(type, item, filter_type)
-
-#undef __array
-#define __array(type, item, len)
-
-#undef __dynamic_array
-#define __dynamic_array(type, item, len) u32 item;
-
-#undef __string
-#define __string(item, src) __dynamic_array(char, item, -1)
-
-#undef __bitmask
-#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
-
-#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))
-
-#undef TRACE_EVENT_FLAGS
-#define TRACE_EVENT_FLAGS(event, flag)
-
-#undef TRACE_EVENT_PERF_PERM
-#define TRACE_EVENT_PERF_PERM(event, expr...)
-
-#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
-
-/*
- * Stage 3 of the trace events.
- *
- * Override the macros in <trace/trace_events.h> to include the following:
- *
- * enum print_line_t
- * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags)
- * {
- * struct trace_seq *s = &iter->seq;
- * struct ftrace_raw_<call> *field; <-- defined in stage 1
- * struct trace_entry *entry;
- * struct trace_seq *p = &iter->tmp_seq;
- * int ret;
- *
- * entry = iter->ent;
- *
- * if (entry->type != event_<call>->event.type) {
- * WARN_ON_ONCE(1);
- * return TRACE_TYPE_UNHANDLED;
- * }
- *
- * field = (typeof(field))entry;
- *
- * trace_seq_init(p);
- * ret = trace_seq_printf(s, "%s: ", <call>);
- * if (ret)
- * ret = trace_seq_printf(s, <TP_printk> "\n");
- * if (!ret)
- * return TRACE_TYPE_PARTIAL_LINE;
- *
- * return TRACE_TYPE_HANDLED;
- * }
- *
- * This is the method used to print the raw event to the trace
- * output format. Note, this is not needed if the data is read
- * in binary.
- */
-
-#undef __entry
-#define __entry field
-
-#undef TP_printk
-#define TP_printk(fmt, args...) fmt "\n", args
-
-#undef __get_dynamic_array
-#define __get_dynamic_array(field) \
- ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
-
-#undef __get_dynamic_array_len
-#define __get_dynamic_array_len(field) \
- ((__entry->__data_loc_##field >> 16) & 0xffff)
-
-#undef __get_str
-#define __get_str(field) (char *)__get_dynamic_array(field)
-
-#undef __get_bitmask
-#define __get_bitmask(field) \
- ({ \
- void *__bitmask = __get_dynamic_array(field); \
- unsigned int __bitmask_size; \
- __bitmask_size = __get_dynamic_array_len(field); \
- ftrace_print_bitmask_seq(p, __bitmask, __bitmask_size); \
- })
-
-#undef __print_flags
-#define __print_flags(flag, delim, flag_array...) \
- ({ \
- static const struct trace_print_flags __flags[] = \
- { flag_array, { -1, NULL }}; \
- ftrace_print_flags_seq(p, delim, flag, __flags); \
- })
-
-#undef __print_symbolic
-#define __print_symbolic(value, symbol_array...) \
- ({ \
- static const struct trace_print_flags symbols[] = \
- { symbol_array, { -1, NULL }}; \
- ftrace_print_symbols_seq(p, value, symbols); \
- })
-
-#undef __print_symbolic_u64
-#if BITS_PER_LONG == 32
-#define __print_symbolic_u64(value, symbol_array...) \
- ({ \
- static const struct trace_print_flags_u64 symbols[] = \
- { symbol_array, { -1, NULL } }; \
- ftrace_print_symbols_seq_u64(p, value, symbols); \
- })
-#else
-#define __print_symbolic_u64(value, symbol_array...) \
- __print_symbolic(value, symbol_array)
-#endif
-
-#undef __print_hex
-#define __print_hex(buf, buf_len) ftrace_print_hex_seq(p, buf, buf_len)
-
-#undef __print_array
-#define __print_array(array, count, el_size) \
- ({ \
- BUILD_BUG_ON(el_size != 1 && el_size != 2 && \
- el_size != 4 && el_size != 8); \
- ftrace_print_array_seq(p, array, count, el_size); \
- })
-
-#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
-static notrace enum print_line_t \
-ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \
- struct trace_event *trace_event) \
-{ \
- struct trace_seq *s = &iter->seq; \
- struct trace_seq __maybe_unused *p = &iter->tmp_seq; \
- struct ftrace_raw_##call *field; \
- int ret; \
- \
- field = (typeof(field))iter->ent; \
- \
- ret = ftrace_raw_output_prep(iter, trace_event); \
- if (ret != TRACE_TYPE_HANDLED) \
- return ret; \
- \
- trace_seq_printf(s, print); \
- \
- return trace_handle_return(s); \
-} \
-static struct trace_event_functions ftrace_event_type_funcs_##call = { \
- .trace = ftrace_raw_output_##call, \
-};
-
-#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 trace_event *event) \
-{ \
- struct ftrace_raw_##template *field; \
- struct trace_entry *entry; \
- struct trace_seq *p = &iter->tmp_seq; \
- \
- entry = iter->ent; \
- \
- if (entry->type != event_##call.event.type) { \
- WARN_ON_ONCE(1); \
- return TRACE_TYPE_UNHANDLED; \
- } \
- \
- field = (typeof(field))entry; \
- \
- trace_seq_init(p); \
- return ftrace_output_call(iter, #call, print); \
-} \
-static struct trace_event_functions ftrace_event_type_funcs_##call = { \
- .trace = ftrace_raw_output_##call, \
-};
-
-#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
-
-#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), filter_type); \
- if (ret) \
- return ret;
-
-#undef __field_struct_ext
-#define __field_struct_ext(type, item, filter_type) \
- ret = trace_define_field(event_call, #type, #item, \
- offsetof(typeof(field), item), \
- sizeof(field.item), \
- 0, filter_type); \
- if (ret) \
- return ret;
-
-#undef __field
-#define __field(type, item) __field_ext(type, item, FILTER_OTHER)
-
-#undef __field_struct
-#define __field_struct(type, item) __field_struct_ext(type, item, FILTER_OTHER)
-
-#undef __array
-#define __array(type, item, len) \
- do { \
- char *type_str = #type"["__stringify(len)"]"; \
- BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
- ret = trace_define_field(event_call, type_str, #item, \
- offsetof(typeof(field), item), \
- sizeof(field.item), \
- is_signed_type(type), FILTER_OTHER); \
- if (ret) \
- return ret; \
- } while (0);
-
-#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), \
- is_signed_type(type), FILTER_OTHER);
-
-#undef __string
-#define __string(item, src) __dynamic_array(char, item, -1)
-
-#undef __bitmask
-#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
-
-#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \
-static int notrace __init \
-ftrace_define_fields_##call(struct ftrace_event_call *event_call) \
-{ \
- struct ftrace_raw_##call field; \
- int ret; \
- \
- 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)
-
-/*
- * remember the offset of each array from the beginning of the event.
- */
-
-#undef __entry
-#define __entry entry
-
-#undef __field
-#define __field(type, item)
-
-#undef __field_ext
-#define __field_ext(type, item, filter_type)
-
-#undef __field_struct
-#define __field_struct(type, item)
-
-#undef __field_struct_ext
-#define __field_struct_ext(type, item, filter_type)
-
-#undef __array
-#define __array(type, item, len)
-
-#undef __dynamic_array
-#define __dynamic_array(type, item, len) \
- __item_length = (len) * sizeof(type); \
- __data_offsets->item = __data_size + \
- offsetof(typeof(*entry), __data); \
- __data_offsets->item |= __item_length << 16; \
- __data_size += __item_length;
-
-#undef __string
-#define __string(item, src) __dynamic_array(char, item, \
- strlen((src) ? (const char *)(src) : "(null)") + 1)
-
-/*
- * __bitmask_size_in_bytes_raw is the number of bytes needed to hold
- * num_possible_cpus().
- */
-#define __bitmask_size_in_bytes_raw(nr_bits) \
- (((nr_bits) + 7) / 8)
-
-#define __bitmask_size_in_longs(nr_bits) \
- ((__bitmask_size_in_bytes_raw(nr_bits) + \
- ((BITS_PER_LONG / 8) - 1)) / (BITS_PER_LONG / 8))
-
-/*
- * __bitmask_size_in_bytes is the number of bytes needed to hold
- * num_possible_cpus() padded out to the nearest long. This is what
- * is saved in the buffer, just to be consistent.
- */
-#define __bitmask_size_in_bytes(nr_bits) \
- (__bitmask_size_in_longs(nr_bits) * (BITS_PER_LONG / 8))
-
-#undef __bitmask
-#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, \
- __bitmask_size_in_longs(nr_bits))
-
-#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; \
- int __maybe_unused __item_length; \
- struct ftrace_raw_##call __maybe_unused *entry; \
- \
- tstruct; \
- \
- 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)
-
-/*
- * Stage 4 of the trace events.
- *
- * Override the macros in <trace/trace_events.h> to include the following:
- *
- * For those macros defined with TRACE_EVENT:
- *
- * static struct ftrace_event_call event_<call>;
- *
- * static void ftrace_raw_event_<call>(void *__data, proto)
- * {
- * struct ftrace_event_file *ftrace_file = __data;
- * struct ftrace_event_call *event_call = ftrace_file->event_call;
- * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
- * unsigned long eflags = ftrace_file->flags;
- * enum event_trigger_type __tt = ETT_NONE;
- * struct ring_buffer_event *event;
- * struct ftrace_raw_<call> *entry; <-- defined in stage 1
- * struct ring_buffer *buffer;
- * unsigned long irq_flags;
- * int __data_size;
- * int pc;
- *
- * if (!(eflags & FTRACE_EVENT_FL_TRIGGER_COND)) {
- * if (eflags & FTRACE_EVENT_FL_TRIGGER_MODE)
- * event_triggers_call(ftrace_file, NULL);
- * if (eflags & FTRACE_EVENT_FL_SOFT_DISABLED)
- * return;
- * }
- *
- * local_save_flags(irq_flags);
- * pc = preempt_count();
- *
- * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
- *
- * event = trace_event_buffer_lock_reserve(&buffer, ftrace_file,
- * event_<call>->event.type,
- * sizeof(*entry) + __data_size,
- * irq_flags, pc);
- * if (!event)
- * return;
- * entry = ring_buffer_event_data(event);
- *
- * { <assign>; } <-- Here we assign the entries by the __field and
- * __array macros.
- *
- * if (eflags & FTRACE_EVENT_FL_TRIGGER_COND)
- * __tt = event_triggers_call(ftrace_file, entry);
- *
- * if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT,
- * &ftrace_file->flags))
- * ring_buffer_discard_commit(buffer, event);
- * else if (!filter_check_discard(ftrace_file, entry, buffer, event))
- * trace_buffer_unlock_commit(buffer, event, irq_flags, pc);
- *
- * if (__tt)
- * event_triggers_post_call(ftrace_file, __tt);
- * }
- *
- * static struct trace_event ftrace_event_type_<call> = {
- * .trace = ftrace_raw_output_<call>, <-- stage 2
- * };
- *
- * static char print_fmt_<call>[] = <TP_printk>;
- *
- * static struct ftrace_event_class __used event_class_<template> = {
- * .system = "<system>",
- * .define_fields = ftrace_define_fields_<call>,
- * .fields = LIST_HEAD_INIT(event_class_##call.fields),
- * .raw_init = trace_event_raw_init,
- * .probe = ftrace_raw_event_##call,
- * .reg = ftrace_event_reg,
- * };
- *
- * static struct ftrace_event_call event_<call> = {
- * .class = event_class_<template>,
- * {
- * .tp = &__tracepoint_<call>,
- * },
- * .event = &ftrace_event_type_<call>,
- * .print_fmt = print_fmt_<call>,
- * .flags = TRACE_EVENT_FL_TRACEPOINT,
- * };
- * // its only safe to use pointers when doing linker tricks to
- * // create an array.
- * static struct ftrace_event_call __used
- * __attribute__((section("_ftrace_events"))) *__event_<call> = &event_<call>;
- *
- */
-
-#ifdef CONFIG_PERF_EVENTS
-
-#define _TRACE_PERF_PROTO(call, proto) \
- static notrace void \
- perf_trace_##call(void *__data, proto);
-
-#define _TRACE_PERF_INIT(call) \
- .perf_probe = perf_trace_##call,
-
-#else
-#define _TRACE_PERF_PROTO(call, proto)
-#define _TRACE_PERF_INIT(call)
-#endif /* CONFIG_PERF_EVENTS */
-
-#undef __entry
-#define __entry entry
-
-#undef __field
-#define __field(type, item)
-
-#undef __field_struct
-#define __field_struct(type, item)
-
-#undef __array
-#define __array(type, item, len)
-
-#undef __dynamic_array
-#define __dynamic_array(type, item, len) \
- __entry->__data_loc_##item = __data_offsets.item;
-
-#undef __string
-#define __string(item, src) __dynamic_array(char, item, -1)
-
-#undef __assign_str
-#define __assign_str(dst, src) \
- strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)");
-
-#undef __bitmask
-#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
-
-#undef __get_bitmask
-#define __get_bitmask(field) (char *)__get_dynamic_array(field)
-
-#undef __assign_bitmask
-#define __assign_bitmask(dst, src, nr_bits) \
- memcpy(__get_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits))
-
-#undef TP_fast_assign
-#define TP_fast_assign(args...) args
-
-#undef __perf_addr
-#define __perf_addr(a) (a)
-
-#undef __perf_count
-#define __perf_count(c) (c)
-
-#undef __perf_task
-#define __perf_task(t) (t)
-
-#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
- \
-static notrace void \
-ftrace_raw_event_##call(void *__data, proto) \
-{ \
- struct ftrace_event_file *ftrace_file = __data; \
- struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
- struct ftrace_event_buffer fbuffer; \
- struct ftrace_raw_##call *entry; \
- int __data_size; \
- \
- if (ftrace_trigger_soft_disabled(ftrace_file)) \
- return; \
- \
- __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
- \
- entry = ftrace_event_buffer_reserve(&fbuffer, ftrace_file, \
- sizeof(*entry) + __data_size); \
- \
- if (!entry) \
- return; \
- \
- tstruct \
- \
- { assign; } \
- \
- ftrace_event_buffer_commit(&fbuffer); \
-}
-/*
- * The ftrace_test_probe is compiled out, it is only here as a build time check
- * to make sure that if the tracepoint handling changes, the ftrace probe will
- * fail to compile unless it too is updated.
- */
-
-#undef DEFINE_EVENT
-#define DEFINE_EVENT(template, call, proto, args) \
-static inline void ftrace_test_probe_##call(void) \
-{ \
- check_trace_callback_type_##call(ftrace_raw_event_##template); \
-}
-
-#undef DEFINE_EVENT_PRINT
-#define DEFINE_EVENT_PRINT(template, name, proto, args, print)
-
-#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
-
-#undef __entry
-#define __entry REC
-
-#undef __print_flags
-#undef __print_symbolic
-#undef __print_hex
-#undef __get_dynamic_array
-#undef __get_dynamic_array_len
-#undef __get_str
-#undef __get_bitmask
-#undef __print_array
-
-#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) \
-_TRACE_PERF_PROTO(call, PARAMS(proto)); \
-static char print_fmt_##call[] = print; \
-static struct ftrace_event_class __used __refdata event_class_##call = { \
- .system = TRACE_SYSTEM_STRING, \
- .define_fields = ftrace_define_fields_##call, \
- .fields = LIST_HEAD_INIT(event_class_##call.fields),\
- .raw_init = trace_event_raw_init, \
- .probe = ftrace_raw_event_##call, \
- .reg = ftrace_event_reg, \
- _TRACE_PERF_INIT(call) \
-};
-
-#undef DEFINE_EVENT
-#define DEFINE_EVENT(template, call, proto, args) \
- \
-static struct ftrace_event_call __used event_##call = { \
- .class = &event_class_##template, \
- { \
- .tp = &__tracepoint_##call, \
- }, \
- .event.funcs = &ftrace_event_type_funcs_##template, \
- .print_fmt = print_fmt_##template, \
- .flags = TRACE_EVENT_FL_TRACEPOINT, \
-}; \
-static struct ftrace_event_call __used \
-__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
-
-#undef DEFINE_EVENT_PRINT
-#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
- \
-static char print_fmt_##call[] = print; \
- \
-static struct ftrace_event_call __used event_##call = { \
- .class = &event_class_##template, \
- { \
- .tp = &__tracepoint_##call, \
- }, \
- .event.funcs = &ftrace_event_type_funcs_##call, \
- .print_fmt = print_fmt_##call, \
- .flags = TRACE_EVENT_FL_TRACEPOINT, \
-}; \
-static struct ftrace_event_call __used \
-__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
-
-#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
-
-#undef TRACE_SYSTEM_VAR
-
-#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_dynamic_array_len
-#define __get_dynamic_array_len(field) \
- ((__entry->__data_loc_##field >> 16) & 0xffff)
-
-#undef __get_str
-#define __get_str(field) (char *)__get_dynamic_array(field)
-
-#undef __get_bitmask
-#define __get_bitmask(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 __perf_task
-#define __perf_task(t) (__task = (t))
-
-#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
-static notrace void \
-perf_trace_##call(void *__data, proto) \
-{ \
- struct ftrace_event_call *event_call = __data; \
- struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
- struct ftrace_raw_##call *entry; \
- struct pt_regs *__regs; \
- u64 __addr = 0, __count = 1; \
- struct task_struct *__task = NULL; \
- struct hlist_head *head; \
- int __entry_size; \
- int __data_size; \
- int rctx; \
- \
- __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
- \
- head = this_cpu_ptr(event_call->perf_events); \
- if (__builtin_constant_p(!__task) && !__task && \
- hlist_empty(head)) \
- return; \
- \
- __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
- sizeof(u64)); \
- __entry_size -= sizeof(u32); \
- \
- entry = perf_trace_buf_prepare(__entry_size, \
- event_call->event.type, &__regs, &rctx); \
- if (!entry) \
- return; \
- \
- perf_fetch_caller_regs(__regs); \
- \
- tstruct \
- \
- { assign; } \
- \
- perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \
- __count, __regs, head, __task); \
-}
-
-/*
- * This part is compiled out, it is only here as a build time check
- * to make sure that if the tracepoint handling changes, the
- * perf probe will fail to compile unless it too is updated.
- */
-#undef DEFINE_EVENT
-#define DEFINE_EVENT(template, call, proto, args) \
-static inline void perf_test_probe_##call(void) \
-{ \
- check_trace_callback_type_##call(perf_trace_##template); \
-}
-
-
-#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 */
-
diff --git a/include/trace/trace_events.h b/include/trace/trace_events.h
new file mode 100644
index 000000000000..37d4b10b111d
--- /dev/null
+++ b/include/trace/trace_events.h
@@ -0,0 +1,859 @@
+/*
+ * Stage 1 of the trace events.
+ *
+ * Override the macros in <trace/trace_events.h> to include the following:
+ *
+ * struct ftrace_raw_<call> {
+ * struct trace_entry ent;
+ * <type> <item>;
+ * <type2> <item2>[<len>];
+ * [...]
+ * };
+ *
+ * The <type> <item> is created by the __field(type, item) macro or
+ * the __array(type2, item2, len) macro.
+ * We simply do "type item;", and that will create the fields
+ * in the structure.
+ */
+
+#include <linux/ftrace_event.h>
+
+#ifndef TRACE_SYSTEM_VAR
+#define TRACE_SYSTEM_VAR TRACE_SYSTEM
+#endif
+
+#define __app__(x, y) str__##x##y
+#define __app(x, y) __app__(x, y)
+
+#define TRACE_SYSTEM_STRING __app(TRACE_SYSTEM_VAR,__trace_system_name)
+
+#define TRACE_MAKE_SYSTEM_STR() \
+ static const char TRACE_SYSTEM_STRING[] = \
+ __stringify(TRACE_SYSTEM)
+
+TRACE_MAKE_SYSTEM_STR();
+
+#undef TRACE_DEFINE_ENUM
+#define TRACE_DEFINE_ENUM(a) \
+ static struct trace_enum_map __used __initdata \
+ __##TRACE_SYSTEM##_##a = \
+ { \
+ .system = TRACE_SYSTEM_STRING, \
+ .enum_string = #a, \
+ .enum_value = a \
+ }; \
+ static struct trace_enum_map __used \
+ __attribute__((section("_ftrace_enum_map"))) \
+ *TRACE_SYSTEM##_##a = &__##TRACE_SYSTEM##_##a
+
+/*
+ * 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 __field_struct
+#define __field_struct(type, item) type item;
+
+#undef __field_struct_ext
+#define __field_struct_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) u32 __data_loc_##item;
+
+#undef __string
+#define __string(item, src) __dynamic_array(char, item, -1)
+
+#undef __bitmask
+#define __bitmask(item, nr_bits) __dynamic_array(char, item, -1)
+
+#undef TP_STRUCT__entry
+#define TP_STRUCT__entry(args...) args
+
+#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]; \
+ }; \
+ \
+ static struct ftrace_event_class event_class_##name;
+
+#undef DEFINE_EVENT
+#define DEFINE_EVENT(template, name, proto, args) \
+ static struct ftrace_event_call __used \
+ __attribute__((__aligned__(4))) event_##name
+
+#undef DEFINE_EVENT_FN
+#define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg) \
+ DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
+
+#undef DEFINE_EVENT_PRINT
+#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
+ DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
+
+/* Callbacks are meaningless to ftrace. */
+#undef TRACE_EVENT_FN
+#define TRACE_EVENT_FN(name, proto, args, tstruct, \
+ assign, print, reg, unreg) \
+ TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \
+ PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \
+
+#undef TRACE_EVENT_FLAGS
+#define TRACE_EVENT_FLAGS(name, value) \
+ __TRACE_EVENT_FLAGS(name, value)
+
+#undef TRACE_EVENT_PERF_PERM
+#define TRACE_EVENT_PERF_PERM(name, expr...) \
+ __TRACE_EVENT_PERF_PERM(name, expr)
+
+#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+
+/*
+ * Stage 2 of the trace events.
+ *
+ * Include the following:
+ *
+ * struct ftrace_data_offsets_<call> {
+ * u32 <item1>;
+ * u32 <item2>;
+ * [...]
+ * };
+ *
+ * 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 TRACE_DEFINE_ENUM
+#define TRACE_DEFINE_ENUM(a)
+
+#undef __field
+#define __field(type, item)
+
+#undef __field_ext
+#define __field_ext(type, item, filter_type)
+
+#undef __field_struct
+#define __field_struct(type, item)
+
+#undef __field_struct_ext
+#define __field_struct_ext(type, item, filter_type)
+
+#undef __array
+#define __array(type, item, len)
+
+#undef __dynamic_array
+#define __dynamic_array(type, item, len) u32 item;
+
+#undef __string
+#define __string(item, src) __dynamic_array(char, item, -1)
+
+#undef __bitmask
+#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
+
+#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))
+
+#undef TRACE_EVENT_FLAGS
+#define TRACE_EVENT_FLAGS(event, flag)
+
+#undef TRACE_EVENT_PERF_PERM
+#define TRACE_EVENT_PERF_PERM(event, expr...)
+
+#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+
+/*
+ * Stage 3 of the trace events.
+ *
+ * Override the macros in <trace/trace_events.h> to include the following:
+ *
+ * enum print_line_t
+ * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags)
+ * {
+ * struct trace_seq *s = &iter->seq;
+ * struct ftrace_raw_<call> *field; <-- defined in stage 1
+ * struct trace_entry *entry;
+ * struct trace_seq *p = &iter->tmp_seq;
+ * int ret;
+ *
+ * entry = iter->ent;
+ *
+ * if (entry->type != event_<call>->event.type) {
+ * WARN_ON_ONCE(1);
+ * return TRACE_TYPE_UNHANDLED;
+ * }
+ *
+ * field = (typeof(field))entry;
+ *
+ * trace_seq_init(p);
+ * ret = trace_seq_printf(s, "%s: ", <call>);
+ * if (ret)
+ * ret = trace_seq_printf(s, <TP_printk> "\n");
+ * if (!ret)
+ * return TRACE_TYPE_PARTIAL_LINE;
+ *
+ * return TRACE_TYPE_HANDLED;
+ * }
+ *
+ * This is the method used to print the raw event to the trace
+ * output format. Note, this is not needed if the data is read
+ * in binary.
+ */
+
+#undef __entry
+#define __entry field
+
+#undef TP_printk
+#define TP_printk(fmt, args...) fmt "\n", args
+
+#undef __get_dynamic_array
+#define __get_dynamic_array(field) \
+ ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
+
+#undef __get_dynamic_array_len
+#define __get_dynamic_array_len(field) \
+ ((__entry->__data_loc_##field >> 16) & 0xffff)
+
+#undef __get_str
+#define __get_str(field) (char *)__get_dynamic_array(field)
+
+#undef __get_bitmask
+#define __get_bitmask(field) \
+ ({ \
+ void *__bitmask = __get_dynamic_array(field); \
+ unsigned int __bitmask_size; \
+ __bitmask_size = __get_dynamic_array_len(field); \
+ ftrace_print_bitmask_seq(p, __bitmask, __bitmask_size); \
+ })
+
+#undef __print_flags
+#define __print_flags(flag, delim, flag_array...) \
+ ({ \
+ static const struct trace_print_flags __flags[] = \
+ { flag_array, { -1, NULL }}; \
+ ftrace_print_flags_seq(p, delim, flag, __flags); \
+ })
+
+#undef __print_symbolic
+#define __print_symbolic(value, symbol_array...) \
+ ({ \
+ static const struct trace_print_flags symbols[] = \
+ { symbol_array, { -1, NULL }}; \
+ ftrace_print_symbols_seq(p, value, symbols); \
+ })
+
+#undef __print_symbolic_u64
+#if BITS_PER_LONG == 32
+#define __print_symbolic_u64(value, symbol_array...) \
+ ({ \
+ static const struct trace_print_flags_u64 symbols[] = \
+ { symbol_array, { -1, NULL } }; \
+ ftrace_print_symbols_seq_u64(p, value, symbols); \
+ })
+#else
+#define __print_symbolic_u64(value, symbol_array...) \
+ __print_symbolic(value, symbol_array)
+#endif
+
+#undef __print_hex
+#define __print_hex(buf, buf_len) ftrace_print_hex_seq(p, buf, buf_len)
+
+#undef __print_array
+#define __print_array(array, count, el_size) \
+ ({ \
+ BUILD_BUG_ON(el_size != 1 && el_size != 2 && \
+ el_size != 4 && el_size != 8); \
+ ftrace_print_array_seq(p, array, count, el_size); \
+ })
+
+#undef DECLARE_EVENT_CLASS
+#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
+static notrace enum print_line_t \
+ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \
+ struct trace_event *trace_event) \
+{ \
+ struct trace_seq *s = &iter->seq; \
+ struct trace_seq __maybe_unused *p = &iter->tmp_seq; \
+ struct ftrace_raw_##call *field; \
+ int ret; \
+ \
+ field = (typeof(field))iter->ent; \
+ \
+ ret = ftrace_raw_output_prep(iter, trace_event); \
+ if (ret != TRACE_TYPE_HANDLED) \
+ return ret; \
+ \
+ trace_seq_printf(s, print); \
+ \
+ return trace_handle_return(s); \
+} \
+static struct trace_event_functions ftrace_event_type_funcs_##call = { \
+ .trace = ftrace_raw_output_##call, \
+};
+
+#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 trace_event *event) \
+{ \
+ struct ftrace_raw_##template *field; \
+ struct trace_entry *entry; \
+ struct trace_seq *p = &iter->tmp_seq; \
+ \
+ entry = iter->ent; \
+ \
+ if (entry->type != event_##call.event.type) { \
+ WARN_ON_ONCE(1); \
+ return TRACE_TYPE_UNHANDLED; \
+ } \
+ \
+ field = (typeof(field))entry; \
+ \
+ trace_seq_init(p); \
+ return ftrace_output_call(iter, #call, print); \
+} \
+static struct trace_event_functions ftrace_event_type_funcs_##call = { \
+ .trace = ftrace_raw_output_##call, \
+};
+
+#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+
+#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), filter_type); \
+ if (ret) \
+ return ret;
+
+#undef __field_struct_ext
+#define __field_struct_ext(type, item, filter_type) \
+ ret = trace_define_field(event_call, #type, #item, \
+ offsetof(typeof(field), item), \
+ sizeof(field.item), \
+ 0, filter_type); \
+ if (ret) \
+ return ret;
+
+#undef __field
+#define __field(type, item) __field_ext(type, item, FILTER_OTHER)
+
+#undef __field_struct
+#define __field_struct(type, item) __field_struct_ext(type, item, FILTER_OTHER)
+
+#undef __array
+#define __array(type, item, len) \
+ do { \
+ char *type_str = #type"["__stringify(len)"]"; \
+ BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
+ ret = trace_define_field(event_call, type_str, #item, \
+ offsetof(typeof(field), item), \
+ sizeof(field.item), \
+ is_signed_type(type), FILTER_OTHER); \
+ if (ret) \
+ return ret; \
+ } while (0);
+
+#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), \
+ is_signed_type(type), FILTER_OTHER);
+
+#undef __string
+#define __string(item, src) __dynamic_array(char, item, -1)
+
+#undef __bitmask
+#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
+
+#undef DECLARE_EVENT_CLASS
+#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \
+static int notrace __init \
+ftrace_define_fields_##call(struct ftrace_event_call *event_call) \
+{ \
+ struct ftrace_raw_##call field; \
+ int ret; \
+ \
+ 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)
+
+/*
+ * remember the offset of each array from the beginning of the event.
+ */
+
+#undef __entry
+#define __entry entry
+
+#undef __field
+#define __field(type, item)
+
+#undef __field_ext
+#define __field_ext(type, item, filter_type)
+
+#undef __field_struct
+#define __field_struct(type, item)
+
+#undef __field_struct_ext
+#define __field_struct_ext(type, item, filter_type)
+
+#undef __array
+#define __array(type, item, len)
+
+#undef __dynamic_array
+#define __dynamic_array(type, item, len) \
+ __item_length = (len) * sizeof(type); \
+ __data_offsets->item = __data_size + \
+ offsetof(typeof(*entry), __data); \
+ __data_offsets->item |= __item_length << 16; \
+ __data_size += __item_length;
+
+#undef __string
+#define __string(item, src) __dynamic_array(char, item, \
+ strlen((src) ? (const char *)(src) : "(null)") + 1)
+
+/*
+ * __bitmask_size_in_bytes_raw is the number of bytes needed to hold
+ * num_possible_cpus().
+ */
+#define __bitmask_size_in_bytes_raw(nr_bits) \
+ (((nr_bits) + 7) / 8)
+
+#define __bitmask_size_in_longs(nr_bits) \
+ ((__bitmask_size_in_bytes_raw(nr_bits) + \
+ ((BITS_PER_LONG / 8) - 1)) / (BITS_PER_LONG / 8))
+
+/*
+ * __bitmask_size_in_bytes is the number of bytes needed to hold
+ * num_possible_cpus() padded out to the nearest long. This is what
+ * is saved in the buffer, just to be consistent.
+ */
+#define __bitmask_size_in_bytes(nr_bits) \
+ (__bitmask_size_in_longs(nr_bits) * (BITS_PER_LONG / 8))
+
+#undef __bitmask
+#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, \
+ __bitmask_size_in_longs(nr_bits))
+
+#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; \
+ int __maybe_unused __item_length; \
+ struct ftrace_raw_##call __maybe_unused *entry; \
+ \
+ tstruct; \
+ \
+ 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)
+
+/*
+ * Stage 4 of the trace events.
+ *
+ * Override the macros in <trace/trace_events.h> to include the following:
+ *
+ * For those macros defined with TRACE_EVENT:
+ *
+ * static struct ftrace_event_call event_<call>;
+ *
+ * static void ftrace_raw_event_<call>(void *__data, proto)
+ * {
+ * struct ftrace_event_file *ftrace_file = __data;
+ * struct ftrace_event_call *event_call = ftrace_file->event_call;
+ * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
+ * unsigned long eflags = ftrace_file->flags;
+ * enum event_trigger_type __tt = ETT_NONE;
+ * struct ring_buffer_event *event;
+ * struct ftrace_raw_<call> *entry; <-- defined in stage 1
+ * struct ring_buffer *buffer;
+ * unsigned long irq_flags;
+ * int __data_size;
+ * int pc;
+ *
+ * if (!(eflags & FTRACE_EVENT_FL_TRIGGER_COND)) {
+ * if (eflags & FTRACE_EVENT_FL_TRIGGER_MODE)
+ * event_triggers_call(ftrace_file, NULL);
+ * if (eflags & FTRACE_EVENT_FL_SOFT_DISABLED)
+ * return;
+ * }
+ *
+ * local_save_flags(irq_flags);
+ * pc = preempt_count();
+ *
+ * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
+ *
+ * event = trace_event_buffer_lock_reserve(&buffer, ftrace_file,
+ * event_<call>->event.type,
+ * sizeof(*entry) + __data_size,
+ * irq_flags, pc);
+ * if (!event)
+ * return;
+ * entry = ring_buffer_event_data(event);
+ *
+ * { <assign>; } <-- Here we assign the entries by the __field and
+ * __array macros.
+ *
+ * if (eflags & FTRACE_EVENT_FL_TRIGGER_COND)
+ * __tt = event_triggers_call(ftrace_file, entry);
+ *
+ * if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT,
+ * &ftrace_file->flags))
+ * ring_buffer_discard_commit(buffer, event);
+ * else if (!filter_check_discard(ftrace_file, entry, buffer, event))
+ * trace_buffer_unlock_commit(buffer, event, irq_flags, pc);
+ *
+ * if (__tt)
+ * event_triggers_post_call(ftrace_file, __tt);
+ * }
+ *
+ * static struct trace_event ftrace_event_type_<call> = {
+ * .trace = ftrace_raw_output_<call>, <-- stage 2
+ * };
+ *
+ * static char print_fmt_<call>[] = <TP_printk>;
+ *
+ * static struct ftrace_event_class __used event_class_<template> = {
+ * .system = "<system>",
+ * .define_fields = ftrace_define_fields_<call>,
+ * .fields = LIST_HEAD_INIT(event_class_##call.fields),
+ * .raw_init = trace_event_raw_init,
+ * .probe = ftrace_raw_event_##call,
+ * .reg = ftrace_event_reg,
+ * };
+ *
+ * static struct ftrace_event_call event_<call> = {
+ * .class = event_class_<template>,
+ * {
+ * .tp = &__tracepoint_<call>,
+ * },
+ * .event = &ftrace_event_type_<call>,
+ * .print_fmt = print_fmt_<call>,
+ * .flags = TRACE_EVENT_FL_TRACEPOINT,
+ * };
+ * // its only safe to use pointers when doing linker tricks to
+ * // create an array.
+ * static struct ftrace_event_call __used
+ * __attribute__((section("_ftrace_events"))) *__event_<call> = &event_<call>;
+ *
+ */
+
+#ifdef CONFIG_PERF_EVENTS
+
+#define _TRACE_PERF_PROTO(call, proto) \
+ static notrace void \
+ perf_trace_##call(void *__data, proto);
+
+#define _TRACE_PERF_INIT(call) \
+ .perf_probe = perf_trace_##call,
+
+#else
+#define _TRACE_PERF_PROTO(call, proto)
+#define _TRACE_PERF_INIT(call)
+#endif /* CONFIG_PERF_EVENTS */
+
+#undef __entry
+#define __entry entry
+
+#undef __field
+#define __field(type, item)
+
+#undef __field_struct
+#define __field_struct(type, item)
+
+#undef __array
+#define __array(type, item, len)
+
+#undef __dynamic_array
+#define __dynamic_array(type, item, len) \
+ __entry->__data_loc_##item = __data_offsets.item;
+
+#undef __string
+#define __string(item, src) __dynamic_array(char, item, -1)
+
+#undef __assign_str
+#define __assign_str(dst, src) \
+ strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)");
+
+#undef __bitmask
+#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
+
+#undef __get_bitmask
+#define __get_bitmask(field) (char *)__get_dynamic_array(field)
+
+#undef __assign_bitmask
+#define __assign_bitmask(dst, src, nr_bits) \
+ memcpy(__get_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits))
+
+#undef TP_fast_assign
+#define TP_fast_assign(args...) args
+
+#undef __perf_addr
+#define __perf_addr(a) (a)
+
+#undef __perf_count
+#define __perf_count(c) (c)
+
+#undef __perf_task
+#define __perf_task(t) (t)
+
+#undef DECLARE_EVENT_CLASS
+#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
+ \
+static notrace void \
+ftrace_raw_event_##call(void *__data, proto) \
+{ \
+ struct ftrace_event_file *ftrace_file = __data; \
+ struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
+ struct ftrace_event_buffer fbuffer; \
+ struct ftrace_raw_##call *entry; \
+ int __data_size; \
+ \
+ if (ftrace_trigger_soft_disabled(ftrace_file)) \
+ return; \
+ \
+ __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
+ \
+ entry = ftrace_event_buffer_reserve(&fbuffer, ftrace_file, \
+ sizeof(*entry) + __data_size); \
+ \
+ if (!entry) \
+ return; \
+ \
+ tstruct \
+ \
+ { assign; } \
+ \
+ ftrace_event_buffer_commit(&fbuffer); \
+}
+/*
+ * The ftrace_test_probe is compiled out, it is only here as a build time check
+ * to make sure that if the tracepoint handling changes, the ftrace probe will
+ * fail to compile unless it too is updated.
+ */
+
+#undef DEFINE_EVENT
+#define DEFINE_EVENT(template, call, proto, args) \
+static inline void ftrace_test_probe_##call(void) \
+{ \
+ check_trace_callback_type_##call(ftrace_raw_event_##template); \
+}
+
+#undef DEFINE_EVENT_PRINT
+#define DEFINE_EVENT_PRINT(template, name, proto, args, print)
+
+#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+
+#undef __entry
+#define __entry REC
+
+#undef __print_flags
+#undef __print_symbolic
+#undef __print_hex
+#undef __get_dynamic_array
+#undef __get_dynamic_array_len
+#undef __get_str
+#undef __get_bitmask
+#undef __print_array
+
+#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) \
+_TRACE_PERF_PROTO(call, PARAMS(proto)); \
+static char print_fmt_##call[] = print; \
+static struct ftrace_event_class __used __refdata event_class_##call = { \
+ .system = TRACE_SYSTEM_STRING, \
+ .define_fields = ftrace_define_fields_##call, \
+ .fields = LIST_HEAD_INIT(event_class_##call.fields),\
+ .raw_init = trace_event_raw_init, \
+ .probe = ftrace_raw_event_##call, \
+ .reg = ftrace_event_reg, \
+ _TRACE_PERF_INIT(call) \
+};
+
+#undef DEFINE_EVENT
+#define DEFINE_EVENT(template, call, proto, args) \
+ \
+static struct ftrace_event_call __used event_##call = { \
+ .class = &event_class_##template, \
+ { \
+ .tp = &__tracepoint_##call, \
+ }, \
+ .event.funcs = &ftrace_event_type_funcs_##template, \
+ .print_fmt = print_fmt_##template, \
+ .flags = TRACE_EVENT_FL_TRACEPOINT, \
+}; \
+static struct ftrace_event_call __used \
+__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
+
+#undef DEFINE_EVENT_PRINT
+#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
+ \
+static char print_fmt_##call[] = print; \
+ \
+static struct ftrace_event_call __used event_##call = { \
+ .class = &event_class_##template, \
+ { \
+ .tp = &__tracepoint_##call, \
+ }, \
+ .event.funcs = &ftrace_event_type_funcs_##call, \
+ .print_fmt = print_fmt_##call, \
+ .flags = TRACE_EVENT_FL_TRACEPOINT, \
+}; \
+static struct ftrace_event_call __used \
+__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
+
+#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+
+#undef TRACE_SYSTEM_VAR
+
+#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_dynamic_array_len
+#define __get_dynamic_array_len(field) \
+ ((__entry->__data_loc_##field >> 16) & 0xffff)
+
+#undef __get_str
+#define __get_str(field) (char *)__get_dynamic_array(field)
+
+#undef __get_bitmask
+#define __get_bitmask(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 __perf_task
+#define __perf_task(t) (__task = (t))
+
+#undef DECLARE_EVENT_CLASS
+#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
+static notrace void \
+perf_trace_##call(void *__data, proto) \
+{ \
+ struct ftrace_event_call *event_call = __data; \
+ struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
+ struct ftrace_raw_##call *entry; \
+ struct pt_regs *__regs; \
+ u64 __addr = 0, __count = 1; \
+ struct task_struct *__task = NULL; \
+ struct hlist_head *head; \
+ int __entry_size; \
+ int __data_size; \
+ int rctx; \
+ \
+ __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
+ \
+ head = this_cpu_ptr(event_call->perf_events); \
+ if (__builtin_constant_p(!__task) && !__task && \
+ hlist_empty(head)) \
+ return; \
+ \
+ __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
+ sizeof(u64)); \
+ __entry_size -= sizeof(u32); \
+ \
+ entry = perf_trace_buf_prepare(__entry_size, \
+ event_call->event.type, &__regs, &rctx); \
+ if (!entry) \
+ return; \
+ \
+ perf_fetch_caller_regs(__regs); \
+ \
+ tstruct \
+ \
+ { assign; } \
+ \
+ perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \
+ __count, __regs, head, __task); \
+}
+
+/*
+ * This part is compiled out, it is only here as a build time check
+ * to make sure that if the tracepoint handling changes, the
+ * perf probe will fail to compile unless it too is updated.
+ */
+#undef DEFINE_EVENT
+#define DEFINE_EVENT(template, call, proto, args) \
+static inline void perf_test_probe_##call(void) \
+{ \
+ check_trace_callback_type_##call(perf_trace_##template); \
+}
+
+
+#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 */
+
--
2.1.4
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