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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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#include <linux/trace_events.h>
#ifndef TRACE_SYSTEM_VAR#define TRACE_SYSTEM_VAR TRACE_SYSTEM#endif
#include "stages/init.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 TRACE_EVENT_SYSCALL#define TRACE_EVENT_SYSCALL(name, proto, args, tstruct, assign, print, reg, unreg) \ DECLARE_EVENT_SYSCALL_CLASS(name, \ PARAMS(proto), \ PARAMS(args), \ PARAMS(tstruct), \ PARAMS(assign), \ PARAMS(print)); \ DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args));
#include "stages/stage1_struct_define.h"
#undef DECLARE_EVENT_CLASS#define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) \ struct trace_event_raw_##name { \ struct trace_entry ent; \ tstruct \ char __data[]; \ }; \ \ static struct trace_event_class event_class_##name;
#undef DECLARE_EVENT_SYSCALL_CLASS#define DECLARE_EVENT_SYSCALL_CLASS DECLARE_EVENT_CLASS
#undef DEFINE_EVENT#define DEFINE_EVENT(template, name, proto, args) \ static struct trace_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_FN_COND#define TRACE_EVENT_FN_COND(name, proto, args, cond, tstruct, \ assign, print, reg, unreg) \ TRACE_EVENT_CONDITION(name, PARAMS(proto), PARAMS(args), PARAMS(cond), \ 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 trace_event_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>. */
#include "stages/stage2_data_offsets.h"
#undef DECLARE_EVENT_CLASS#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ struct trace_event_data_offsets_##call { \ tstruct; \ };
#undef DECLARE_EVENT_SYSCALL_CLASS#define DECLARE_EVENT_SYSCALL_CLASS DECLARE_EVENT_CLASS
#undef DEFINE_EVENT#define DEFINE_EVENT(template, name, proto, args)
#undef DEFINE_EVENT_PRINT#define DEFINE_EVENT_PRINT(template, name, proto, args, print)
#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 the event tracepoint header <trace/events/XXX.h> * to include the following: * * enum print_line_t * trace_raw_output_<call>(struct trace_iterator *iter, int flags) * { * struct trace_seq *s = &iter->seq; * struct trace_event_raw_<call> *field; <-- defined in stage 1 * struct trace_seq *p = &iter->tmp_seq; * * -------(for event)------- * * struct trace_entry *entry; * * 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 trace_output_call(iter, <call>, <TP_printk> "\n"); * * ------(or, for event class)------ * * int ret; * * field = (typeof(field))iter->ent; * * ret = trace_raw_output_prep(iter, trace_event); * if (ret != TRACE_TYPE_HANDLED) * return ret; * * trace_event_printf(iter, <TP_printk> "\n"); * * return trace_handle_return(s); * ------- * } * * 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. */
#include "stages/stage3_trace_output.h"
#undef DECLARE_EVENT_CLASS#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \static notrace enum print_line_t \trace_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 trace_event_raw_##call *field; \ int ret; \ \ field = (typeof(field))iter->ent; \ \ ret = trace_raw_output_prep(iter, trace_event); \ if (ret != TRACE_TYPE_HANDLED) \ return ret; \ \ trace_event_printf(iter, print); \ \ return trace_handle_return(s); \} \static struct trace_event_functions trace_event_type_funcs_##call = { \ .trace = trace_raw_output_##call, \};
#undef DECLARE_EVENT_SYSCALL_CLASS#define DECLARE_EVENT_SYSCALL_CLASS DECLARE_EVENT_CLASS
#undef DEFINE_EVENT_PRINT#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \static notrace enum print_line_t \trace_raw_output_##call(struct trace_iterator *iter, int flags, \ struct trace_event *event) \{ \ struct trace_event_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 trace_output_call(iter, #call, print); \} \static struct trace_event_functions trace_event_type_funcs_##call = { \ .trace = trace_raw_output_##call, \};
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
#include "stages/stage4_event_fields.h"
#undef DECLARE_EVENT_CLASS#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \static struct trace_event_fields trace_event_fields_##call[] = { \ tstruct \ {} };
#undef DECLARE_EVENT_SYSCALL_CLASS#define DECLARE_EVENT_SYSCALL_CLASS DECLARE_EVENT_CLASS
#undef DEFINE_EVENT_PRINT#define DEFINE_EVENT_PRINT(template, name, proto, args, print)
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
#include "stages/stage5_get_offsets.h"
#undef DECLARE_EVENT_CLASS#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \static inline notrace int trace_event_get_offsets_##call( \ struct trace_event_data_offsets_##call *__data_offsets, proto) \{ \ int __data_size = 0; \ int __maybe_unused __item_length; \ struct trace_event_raw_##call __maybe_unused *entry; \ \ tstruct; \ \ return __data_size; \}
#undef DECLARE_EVENT_SYSCALL_CLASS#define DECLARE_EVENT_SYSCALL_CLASS DECLARE_EVENT_CLASS
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
/* * Stage 4 of the trace events. * * Override the macros in the event tracepoint header <trace/events/XXX.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 trace_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 = trace_event_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>", * .fields_array = trace_event_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 * __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 */
#include "stages/stage6_event_callback.h"
#undef __DECLARE_EVENT_CLASS#define __DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \static notrace void \do_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 = trace_event_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); \}
#undef DECLARE_EVENT_CLASS#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \__DECLARE_EVENT_CLASS(call, PARAMS(proto), PARAMS(args), PARAMS(tstruct), \ PARAMS(assign), PARAMS(print)) \static notrace void \trace_event_raw_event_##call(void *__data, proto) \{ \ guard(preempt_notrace)(); \ do_trace_event_raw_event_##call(__data, args); \}
#undef DECLARE_EVENT_SYSCALL_CLASS#define DECLARE_EVENT_SYSCALL_CLASS(call, proto, args, tstruct, assign, print) \__DECLARE_EVENT_CLASS(call, PARAMS(proto), PARAMS(args), PARAMS(tstruct), \ PARAMS(assign), PARAMS(print)) \static notrace void \trace_event_raw_event_##call(void *__data, proto) \{ \ might_fault(); \ guard(preempt_notrace)(); \ do_trace_event_raw_event_##call(__data, args); \}
/* * 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); \}
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
#undef __DECLARE_EVENT_CLASS
#include "stages/stage7_class_define.h"
#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, \ .fields_array = trace_event_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 DECLARE_EVENT_SYSCALL_CLASS#define DECLARE_EVENT_SYSCALL_CLASS DECLARE_EVENT_CLASS
#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 \__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 \__section("_ftrace_events") *__event_##call = &event_##call
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)