mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-15 23:14:31 +08:00
3ad017bac9
The name "ftrace" really refers to the function hook infrastructure. It is not about the trace_events. The structure ftrace_event_type_funcs_##call is used to define how the trace_events will be printed. It has nothing to do with function tracing. Rename it. Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
351 lines
10 KiB
C
351 lines
10 KiB
C
/*
|
|
* 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 trace_event_call event_<call>;
|
|
*
|
|
* static void trace_event_raw_event_<call>(void *__data, proto)
|
|
* {
|
|
* struct trace_event_file *trace_file = __data;
|
|
* struct trace_event_call *event_call = trace_file->event_call;
|
|
* struct trace_event_data_offsets_<call> __maybe_unused __data_offsets;
|
|
* unsigned long eflags = trace_file->flags;
|
|
* enum event_trigger_type __tt = ETT_NONE;
|
|
* struct ring_buffer_event *event;
|
|
* struct trace_event_raw_<call> *entry; <-- defined in stage 1
|
|
* struct ring_buffer *buffer;
|
|
* unsigned long irq_flags;
|
|
* int __data_size;
|
|
* int pc;
|
|
*
|
|
* if (!(eflags & EVENT_FILE_FL_TRIGGER_COND)) {
|
|
* if (eflags & EVENT_FILE_FL_TRIGGER_MODE)
|
|
* event_triggers_call(trace_file, NULL);
|
|
* if (eflags & EVENT_FILE_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, trace_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 & EVENT_FILE_FL_TRIGGER_COND)
|
|
* __tt = event_triggers_call(trace_file, entry);
|
|
*
|
|
* if (test_bit(EVENT_FILE_FL_SOFT_DISABLED_BIT,
|
|
* &trace_file->flags))
|
|
* ring_buffer_discard_commit(buffer, event);
|
|
* else if (!filter_check_discard(trace_file, entry, buffer, event))
|
|
* trace_buffer_unlock_commit(buffer, event, irq_flags, pc);
|
|
*
|
|
* if (__tt)
|
|
* event_triggers_post_call(trace_file, __tt);
|
|
* }
|
|
*
|
|
* static struct trace_event ftrace_event_type_<call> = {
|
|
* .trace = trace_raw_output_<call>, <-- stage 2
|
|
* };
|
|
*
|
|
* static char print_fmt_<call>[] = <TP_printk>;
|
|
*
|
|
* static struct trace_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 = trace_event_raw_event_##call,
|
|
* .reg = trace_event_reg,
|
|
* };
|
|
*
|
|
* static struct trace_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 trace_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 \
|
|
trace_event_raw_event_##call(void *__data, proto) \
|
|
{ \
|
|
struct trace_event_file *trace_file = __data; \
|
|
struct trace_event_data_offsets_##call __maybe_unused __data_offsets;\
|
|
struct trace_event_buffer fbuffer; \
|
|
struct trace_event_raw_##call *entry; \
|
|
int __data_size; \
|
|
\
|
|
if (trace_trigger_soft_disabled(trace_file)) \
|
|
return; \
|
|
\
|
|
__data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
|
|
\
|
|
entry = trace_event_buffer_reserve(&fbuffer, trace_file, \
|
|
sizeof(*entry) + __data_size); \
|
|
\
|
|
if (!entry) \
|
|
return; \
|
|
\
|
|
tstruct \
|
|
\
|
|
{ assign; } \
|
|
\
|
|
trace_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(trace_event_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 trace_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 = trace_event_raw_event_##call, \
|
|
.reg = trace_event_reg, \
|
|
_TRACE_PERF_INIT(call) \
|
|
};
|
|
|
|
#undef DEFINE_EVENT
|
|
#define DEFINE_EVENT(template, call, proto, args) \
|
|
\
|
|
static struct trace_event_call __used event_##call = { \
|
|
.class = &event_class_##template, \
|
|
{ \
|
|
.tp = &__tracepoint_##call, \
|
|
}, \
|
|
.event.funcs = &trace_event_type_funcs_##template, \
|
|
.print_fmt = print_fmt_##template, \
|
|
.flags = TRACE_EVENT_FL_TRACEPOINT, \
|
|
}; \
|
|
static struct trace_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 trace_event_call __used event_##call = { \
|
|
.class = &event_class_##template, \
|
|
{ \
|
|
.tp = &__tracepoint_##call, \
|
|
}, \
|
|
.event.funcs = &trace_event_type_funcs_##call, \
|
|
.print_fmt = print_fmt_##call, \
|
|
.flags = TRACE_EVENT_FL_TRACEPOINT, \
|
|
}; \
|
|
static struct trace_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 trace_event_call *event_call = __data; \
|
|
struct trace_event_data_offsets_##call __maybe_unused __data_offsets;\
|
|
struct trace_event_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 */
|