| /* |
| * Stage 3 of the trace events. |
| * |
| * Override the macros in <trace/trace_event_types.h> to include the following: |
| * |
| * static void ftrace_event_<call>(proto) |
| * { |
| * event_trace_printk(_RET_IP_, "<call>: " <fmt>); |
| * } |
| * |
| * static int ftrace_reg_event_<call>(void) |
| * { |
| * 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; |
| * } |
| * |
| * static void ftrace_unreg_event_<call>(void) |
| * { |
| * unregister_trace_<call>(ftrace_event_<call>); |
| * } |
| * |
| * For those macros defined with TRACE_FORMAT: |
| * |
| * static struct ftrace_event_call __used |
| * __attribute__((__aligned__(4))) |
| * __attribute__((section("_ftrace_events"))) event_<call> = { |
| * .name = "<call>", |
| * .regfunc = ftrace_reg_event_<call>, |
| * .unregfunc = ftrace_unreg_event_<call>, |
| * } |
| * |
| * |
| * For those macros defined with TRACE_EVENT: |
| * |
| * static struct ftrace_event_call event_<call>; |
| * |
| * static void ftrace_raw_event_<call>(proto) |
| * { |
| * struct ring_buffer_event *event; |
| * struct ftrace_raw_<call> *entry; <-- defined in stage 1 |
| * unsigned long irq_flags; |
| * int pc; |
| * |
| * local_save_flags(irq_flags); |
| * pc = preempt_count(); |
| * |
| * event = trace_current_buffer_lock_reserve(event_<call>.id, |
| * sizeof(struct ftrace_raw_<call>), |
| * irq_flags, pc); |
| * if (!event) |
| * return; |
| * entry = ring_buffer_event_data(event); |
| * |
| * <assign>; <-- Here we assign the entries by the __field and |
| * __array macros. |
| * |
| * trace_current_buffer_unlock_commit(event, irq_flags, pc); |
| * } |
| * |
| * static int ftrace_raw_reg_event_<call>(void) |
| * { |
| * int ret; |
| * |
| * ret = register_trace_<call>(ftrace_raw_event_<call>); |
| * if (!ret) |
| * pr_info("event trace: Could not activate trace point " |
| * "probe to <call>"); |
| * return ret; |
| * } |
| * |
| * static void ftrace_unreg_event_<call>(void) |
| * { |
| * unregister_trace_<call>(ftrace_raw_event_<call>); |
| * } |
| * |
| * static struct trace_event ftrace_event_type_<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>, |
| * .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 *call) \ |
| { \ |
| int ret = 0; \ |
| \ |
| if (!atomic_inc_return(&call->profile_count)) \ |
| ret = register_trace_##call(ftrace_profile_##call); \ |
| \ |
| return ret; \ |
| } \ |
| \ |
| static void ftrace_profile_disable_##call(struct ftrace_event_call *call) \ |
| { \ |
| if (atomic_add_negative(-1, &call->profile_count)) \ |
| unregister_trace_##call(ftrace_profile_##call); \ |
| } |
| |
| #define _TRACE_PROFILE_INIT(call) \ |
| .profile_count = ATOMIC_INIT(-1), \ |
| .profile_enable = ftrace_profile_enable_##call, \ |
| .profile_disable = ftrace_profile_disable_##call, |
| |
| #else |
| #define _TRACE_PROFILE(call, proto, args) |
| #define _TRACE_PROFILE_INIT(call) |
| #endif |
| |
| #define _TRACE_FORMAT(call, proto, args, fmt) \ |
| static void ftrace_event_##call(proto) \ |
| { \ |
| event_trace_printk(_RET_IP_, #call ": " fmt); \ |
| } \ |
| \ |
| static int ftrace_reg_event_##call(void) \ |
| { \ |
| int ret; \ |
| \ |
| ret = register_trace_##call(ftrace_event_##call); \ |
| if (ret) \ |
| pr_info("event trace: Could not activate trace point " \ |
| "probe to " #call "\n"); \ |
| return ret; \ |
| } \ |
| \ |
| static void ftrace_unreg_event_##call(void) \ |
| { \ |
| unregister_trace_##call(ftrace_event_##call); \ |
| } \ |
| \ |
| static struct ftrace_event_call event_##call; \ |
| \ |
| static int ftrace_init_event_##call(void) \ |
| { \ |
| int id; \ |
| \ |
| id = register_ftrace_event(NULL); \ |
| if (!id) \ |
| return -ENODEV; \ |
| event_##call.id = id; \ |
| return 0; \ |
| } |
| |
| #undef TRACE_FORMAT |
| #define TRACE_FORMAT(call, proto, args, fmt) \ |
| _TRACE_FORMAT(call, PARAMS(proto), PARAMS(args), PARAMS(fmt)) \ |
| _TRACE_PROFILE(call, PARAMS(proto), PARAMS(args)) \ |
| static struct ftrace_event_call __used \ |
| __attribute__((__aligned__(4))) \ |
| __attribute__((section("_ftrace_events"))) event_##call = { \ |
| .name = #call, \ |
| .system = __stringify(TRACE_SYSTEM), \ |
| .raw_init = ftrace_init_event_##call, \ |
| .regfunc = ftrace_reg_event_##call, \ |
| .unregfunc = ftrace_unreg_event_##call, \ |
| _TRACE_PROFILE_INIT(call) \ |
| } |
| |
| #undef __entry |
| #define __entry entry |
| |
| #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; \ |
| \ |
| static void ftrace_raw_event_##call(proto) \ |
| { \ |
| struct ftrace_event_call *call = &event_##call; \ |
| struct ring_buffer_event *event; \ |
| struct ftrace_raw_##call *entry; \ |
| unsigned long irq_flags; \ |
| int pc; \ |
| \ |
| local_save_flags(irq_flags); \ |
| pc = preempt_count(); \ |
| \ |
| event = trace_current_buffer_lock_reserve(event_##call.id, \ |
| sizeof(struct ftrace_raw_##call), \ |
| irq_flags, pc); \ |
| if (!event) \ |
| return; \ |
| entry = ring_buffer_event_data(event); \ |
| \ |
| assign; \ |
| \ |
| if (call->preds && !filter_match_preds(call, entry)) \ |
| ring_buffer_event_discard(event); \ |
| \ |
| trace_nowake_buffer_unlock_commit(event, irq_flags, pc); \ |
| \ |
| } \ |
| \ |
| static int ftrace_raw_reg_event_##call(void) \ |
| { \ |
| int ret; \ |
| \ |
| 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 void ftrace_raw_unreg_event_##call(void) \ |
| { \ |
| unregister_trace_##call(ftrace_raw_event_##call); \ |
| } \ |
| \ |
| static struct trace_event ftrace_event_type_##call = { \ |
| .trace = ftrace_raw_output_##call, \ |
| }; \ |
| \ |
| 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); \ |
| return 0; \ |
| } \ |
| \ |
| static struct ftrace_event_call __used \ |
| __attribute__((__aligned__(4))) \ |
| __attribute__((section("_ftrace_events"))) event_##call = { \ |
| .name = #call, \ |
| .system = __stringify(TRACE_SYSTEM), \ |
| .raw_init = ftrace_raw_init_event_##call, \ |
| .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) \ |
| } |
| |
| #include <trace/trace_event_types.h> |
| |
| #undef _TRACE_PROFILE |
| #undef _TRACE_PROFILE_INIT |
| |