| /* |
| * trace_export.c - export basic ftrace utilities to user space |
| * |
| * Copyright (C) 2009 Steven Rostedt <srostedt@redhat.com> |
| */ |
| #include <linux/stringify.h> |
| #include <linux/kallsyms.h> |
| #include <linux/seq_file.h> |
| #include <linux/debugfs.h> |
| #include <linux/uaccess.h> |
| #include <linux/ftrace.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/fs.h> |
| |
| #include "trace_output.h" |
| |
| #undef TRACE_SYSTEM |
| #define TRACE_SYSTEM ftrace |
| |
| /* not needed for this file */ |
| #undef __field_struct |
| #define __field_struct(type, item) |
| |
| #undef __field |
| #define __field(type, item) type item; |
| |
| #undef __field_desc |
| #define __field_desc(type, container, item) type item; |
| |
| #undef __array |
| #define __array(type, item, size) type item[size]; |
| |
| #undef __array_desc |
| #define __array_desc(type, container, item, size) type item[size]; |
| |
| #undef __dynamic_array |
| #define __dynamic_array(type, item) type item[]; |
| |
| #undef F_STRUCT |
| #define F_STRUCT(args...) args |
| |
| #undef F_printk |
| #define F_printk(fmt, args...) fmt, args |
| |
| #undef FTRACE_ENTRY |
| #define FTRACE_ENTRY(name, struct_name, id, tstruct, print) \ |
| struct ____ftrace_##name { \ |
| tstruct \ |
| }; \ |
| static void __always_unused ____ftrace_check_##name(void) \ |
| { \ |
| struct ____ftrace_##name *__entry = NULL; \ |
| \ |
| /* force compile-time check on F_printk() */ \ |
| printk(print); \ |
| } |
| |
| #undef FTRACE_ENTRY_DUP |
| #define FTRACE_ENTRY_DUP(name, struct_name, id, tstruct, print) \ |
| FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print)) |
| |
| #include "trace_entries.h" |
| |
| #undef __field |
| #define __field(type, item) \ |
| ret = trace_define_field(event_call, #type, #item, \ |
| offsetof(typeof(field), item), \ |
| sizeof(field.item), \ |
| is_signed_type(type), FILTER_OTHER); \ |
| if (ret) \ |
| return ret; |
| |
| #undef __field_desc |
| #define __field_desc(type, container, item) \ |
| ret = trace_define_field(event_call, #type, #item, \ |
| offsetof(typeof(field), \ |
| container.item), \ |
| sizeof(field.container.item), \ |
| is_signed_type(type), FILTER_OTHER); \ |
| if (ret) \ |
| return ret; |
| |
| #undef __array |
| #define __array(type, item, len) \ |
| do { \ |
| BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ |
| mutex_lock(&event_storage_mutex); \ |
| snprintf(event_storage, sizeof(event_storage), \ |
| "%s[%d]", #type, len); \ |
| ret = trace_define_field(event_call, event_storage, #item, \ |
| offsetof(typeof(field), item), \ |
| sizeof(field.item), \ |
| is_signed_type(type), FILTER_OTHER); \ |
| mutex_unlock(&event_storage_mutex); \ |
| if (ret) \ |
| return ret; \ |
| } while (0); |
| |
| #undef __array_desc |
| #define __array_desc(type, container, item, len) \ |
| BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ |
| ret = trace_define_field(event_call, #type "[" #len "]", #item, \ |
| offsetof(typeof(field), \ |
| container.item), \ |
| sizeof(field.container.item), \ |
| is_signed_type(type), FILTER_OTHER); \ |
| if (ret) \ |
| return ret; |
| |
| #undef __dynamic_array |
| #define __dynamic_array(type, item) \ |
| ret = trace_define_field(event_call, #type, #item, \ |
| offsetof(typeof(field), item), \ |
| 0, is_signed_type(type), FILTER_OTHER);\ |
| if (ret) \ |
| return ret; |
| |
| #undef FTRACE_ENTRY |
| #define FTRACE_ENTRY(name, struct_name, id, tstruct, print) \ |
| int \ |
| ftrace_define_fields_##name(struct ftrace_event_call *event_call) \ |
| { \ |
| struct struct_name field; \ |
| int ret; \ |
| \ |
| tstruct; \ |
| \ |
| return ret; \ |
| } |
| |
| #include "trace_entries.h" |
| |
| #undef __entry |
| #define __entry REC |
| |
| #undef __field |
| #define __field(type, item) |
| |
| #undef __field_desc |
| #define __field_desc(type, container, item) |
| |
| #undef __array |
| #define __array(type, item, len) |
| |
| #undef __array_desc |
| #define __array_desc(type, container, item, len) |
| |
| #undef __dynamic_array |
| #define __dynamic_array(type, item) |
| |
| #undef F_printk |
| #define F_printk(fmt, args...) __stringify(fmt) ", " __stringify(args) |
| |
| #undef FTRACE_ENTRY |
| #define FTRACE_ENTRY(call, struct_name, etype, tstruct, print) \ |
| \ |
| struct ftrace_event_class event_class_ftrace_##call = { \ |
| .system = __stringify(TRACE_SYSTEM), \ |
| .define_fields = ftrace_define_fields_##call, \ |
| .fields = LIST_HEAD_INIT(event_class_ftrace_##call.fields),\ |
| }; \ |
| \ |
| struct ftrace_event_call __used event_##call = { \ |
| .name = #call, \ |
| .event.type = etype, \ |
| .class = &event_class_ftrace_##call, \ |
| .print_fmt = print, \ |
| }; \ |
| struct ftrace_event_call __used \ |
| __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call; |
| |
| #include "trace_entries.h" |