1770cb243SSteven Rostedt /* 2770cb243SSteven Rostedt * trace_export.c - export basic ftrace utilities to user space 3770cb243SSteven Rostedt * 4770cb243SSteven Rostedt * Copyright (C) 2009 Steven Rostedt <srostedt@redhat.com> 5770cb243SSteven Rostedt */ 6770cb243SSteven Rostedt #include <linux/stringify.h> 7770cb243SSteven Rostedt #include <linux/kallsyms.h> 8770cb243SSteven Rostedt #include <linux/seq_file.h> 9770cb243SSteven Rostedt #include <linux/debugfs.h> 10770cb243SSteven Rostedt #include <linux/uaccess.h> 11770cb243SSteven Rostedt #include <linux/ftrace.h> 12770cb243SSteven Rostedt #include <linux/module.h> 13770cb243SSteven Rostedt #include <linux/init.h> 14770cb243SSteven Rostedt #include <linux/fs.h> 15770cb243SSteven Rostedt 16770cb243SSteven Rostedt #include "trace_output.h" 17770cb243SSteven Rostedt 184e5292eaSSteven Rostedt #undef TRACE_SYSTEM 194e5292eaSSteven Rostedt #define TRACE_SYSTEM ftrace 20da4d0302SSteven Rostedt 214e5292eaSSteven Rostedt /* not needed for this file */ 224e5292eaSSteven Rostedt #undef __field_struct 234e5292eaSSteven Rostedt #define __field_struct(type, item) 24da4d0302SSteven Rostedt 254e5292eaSSteven Rostedt #undef __field 2605ffa2d0SLi Zefan #define __field(type, item) type item; 2705ffa2d0SLi Zefan 2805ffa2d0SLi Zefan #undef __field_desc 2905ffa2d0SLi Zefan #define __field_desc(type, container, item) type item; 3005ffa2d0SLi Zefan 3105ffa2d0SLi Zefan #undef __array 3205ffa2d0SLi Zefan #define __array(type, item, size) type item[size]; 3305ffa2d0SLi Zefan 3405ffa2d0SLi Zefan #undef __array_desc 3505ffa2d0SLi Zefan #define __array_desc(type, container, item, size) type item[size]; 3605ffa2d0SLi Zefan 3705ffa2d0SLi Zefan #undef __dynamic_array 3805ffa2d0SLi Zefan #define __dynamic_array(type, item) type item[]; 3905ffa2d0SLi Zefan 4005ffa2d0SLi Zefan #undef F_STRUCT 4105ffa2d0SLi Zefan #define F_STRUCT(args...) args 4205ffa2d0SLi Zefan 4305ffa2d0SLi Zefan #undef F_printk 4405ffa2d0SLi Zefan #define F_printk(fmt, args...) fmt, args 4505ffa2d0SLi Zefan 4605ffa2d0SLi Zefan #undef FTRACE_ENTRY 4705ffa2d0SLi Zefan #define FTRACE_ENTRY(name, struct_name, id, tstruct, print) \ 4805ffa2d0SLi Zefan struct ____ftrace_##name { \ 4905ffa2d0SLi Zefan tstruct \ 5005ffa2d0SLi Zefan }; \ 515e9b3972SLi Zefan static void __always_unused ____ftrace_check_##name(void) \ 5205ffa2d0SLi Zefan { \ 5305ffa2d0SLi Zefan struct ____ftrace_##name *__entry = NULL; \ 5405ffa2d0SLi Zefan \ 555e9b3972SLi Zefan /* force compile-time check on F_printk() */ \ 5605ffa2d0SLi Zefan printk(print); \ 5705ffa2d0SLi Zefan } 5805ffa2d0SLi Zefan 5905ffa2d0SLi Zefan #undef FTRACE_ENTRY_DUP 6005ffa2d0SLi Zefan #define FTRACE_ENTRY_DUP(name, struct_name, id, tstruct, print) \ 6105ffa2d0SLi Zefan FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print)) 6205ffa2d0SLi Zefan 6305ffa2d0SLi Zefan #include "trace_entries.h" 6405ffa2d0SLi Zefan 654e5292eaSSteven Rostedt #undef __field 664e5292eaSSteven Rostedt #define __field(type, item) \ 674e5292eaSSteven Rostedt ret = trace_define_field(event_call, #type, #item, \ 684e5292eaSSteven Rostedt offsetof(typeof(field), item), \ 694e5292eaSSteven Rostedt sizeof(field.item), \ 704e5292eaSSteven Rostedt is_signed_type(type), FILTER_OTHER); \ 714e5292eaSSteven Rostedt if (ret) \ 724e5292eaSSteven Rostedt return ret; 734e5292eaSSteven Rostedt 744e5292eaSSteven Rostedt #undef __field_desc 754e5292eaSSteven Rostedt #define __field_desc(type, container, item) \ 764e5292eaSSteven Rostedt ret = trace_define_field(event_call, #type, #item, \ 774e5292eaSSteven Rostedt offsetof(typeof(field), \ 784e5292eaSSteven Rostedt container.item), \ 794e5292eaSSteven Rostedt sizeof(field.container.item), \ 804e5292eaSSteven Rostedt is_signed_type(type), FILTER_OTHER); \ 814e5292eaSSteven Rostedt if (ret) \ 824e5292eaSSteven Rostedt return ret; 834e5292eaSSteven Rostedt 844e5292eaSSteven Rostedt #undef __array 854e5292eaSSteven Rostedt #define __array(type, item, len) \ 8604295780SSteven Rostedt do { \ 874e5292eaSSteven Rostedt BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ 8804295780SSteven Rostedt mutex_lock(&event_storage_mutex); \ 8904295780SSteven Rostedt snprintf(event_storage, sizeof(event_storage), \ 9004295780SSteven Rostedt "%s[%d]", #type, len); \ 9104295780SSteven Rostedt ret = trace_define_field(event_call, event_storage, #item, \ 924e5292eaSSteven Rostedt offsetof(typeof(field), item), \ 93fb7ae981SLai Jiangshan sizeof(field.item), \ 94fb7ae981SLai Jiangshan is_signed_type(type), FILTER_OTHER); \ 9504295780SSteven Rostedt mutex_unlock(&event_storage_mutex); \ 964e5292eaSSteven Rostedt if (ret) \ 9704295780SSteven Rostedt return ret; \ 9804295780SSteven Rostedt } while (0); 994e5292eaSSteven Rostedt 1004e5292eaSSteven Rostedt #undef __array_desc 1014e5292eaSSteven Rostedt #define __array_desc(type, container, item, len) \ 1024e5292eaSSteven Rostedt BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ 1034e5292eaSSteven Rostedt ret = trace_define_field(event_call, #type "[" #len "]", #item, \ 1044e5292eaSSteven Rostedt offsetof(typeof(field), \ 1054e5292eaSSteven Rostedt container.item), \ 106fb7ae981SLai Jiangshan sizeof(field.container.item), \ 107fb7ae981SLai Jiangshan is_signed_type(type), FILTER_OTHER); \ 1084e5292eaSSteven Rostedt if (ret) \ 1094e5292eaSSteven Rostedt return ret; 1104e5292eaSSteven Rostedt 1114e5292eaSSteven Rostedt #undef __dynamic_array 112809826a3SLai Jiangshan #define __dynamic_array(type, item) \ 113809826a3SLai Jiangshan ret = trace_define_field(event_call, #type, #item, \ 114809826a3SLai Jiangshan offsetof(typeof(field), item), \ 115809826a3SLai Jiangshan 0, is_signed_type(type), FILTER_OTHER);\ 116809826a3SLai Jiangshan if (ret) \ 117809826a3SLai Jiangshan return ret; 1184e5292eaSSteven Rostedt 1194e5292eaSSteven Rostedt #undef FTRACE_ENTRY 1204e5292eaSSteven Rostedt #define FTRACE_ENTRY(name, struct_name, id, tstruct, print) \ 1214e5292eaSSteven Rostedt int \ 1224e5292eaSSteven Rostedt ftrace_define_fields_##name(struct ftrace_event_call *event_call) \ 123e45f2e2bSTom Zanussi { \ 1244e5292eaSSteven Rostedt struct struct_name field; \ 125e45f2e2bSTom Zanussi int ret; \ 126e45f2e2bSTom Zanussi \ 1274e5292eaSSteven Rostedt tstruct; \ 128e45f2e2bSTom Zanussi \ 129e45f2e2bSTom Zanussi return ret; \ 130e45f2e2bSTom Zanussi } 131e45f2e2bSTom Zanussi 1324e5292eaSSteven Rostedt #include "trace_entries.h" 1334e5292eaSSteven Rostedt 134509e760cSLai Jiangshan #undef __entry 135509e760cSLai Jiangshan #define __entry REC 136509e760cSLai Jiangshan 1374e5292eaSSteven Rostedt #undef __field 1384e5292eaSSteven Rostedt #define __field(type, item) 1394e5292eaSSteven Rostedt 1404e5292eaSSteven Rostedt #undef __field_desc 1414e5292eaSSteven Rostedt #define __field_desc(type, container, item) 1424e5292eaSSteven Rostedt 1434e5292eaSSteven Rostedt #undef __array 1444e5292eaSSteven Rostedt #define __array(type, item, len) 1454e5292eaSSteven Rostedt 1464e5292eaSSteven Rostedt #undef __array_desc 1474e5292eaSSteven Rostedt #define __array_desc(type, container, item, len) 1484e5292eaSSteven Rostedt 1494e5292eaSSteven Rostedt #undef __dynamic_array 1504e5292eaSSteven Rostedt #define __dynamic_array(type, item) 1514e5292eaSSteven Rostedt 152509e760cSLai Jiangshan #undef F_printk 153509e760cSLai Jiangshan #define F_printk(fmt, args...) #fmt ", " __stringify(args) 154509e760cSLai Jiangshan 1554e5292eaSSteven Rostedt #undef FTRACE_ENTRY 15632c0edaeSSteven Rostedt #define FTRACE_ENTRY(call, struct_name, etype, tstruct, print) \ 157770cb243SSteven Rostedt \ 1582e33af02SSteven Rostedt struct ftrace_event_class event_class_ftrace_##call = { \ 1592e33af02SSteven Rostedt .system = __stringify(TRACE_SYSTEM), \ 1602e33af02SSteven Rostedt .define_fields = ftrace_define_fields_##call, \ 161ffb9f995SLi Zefan .fields = LIST_HEAD_INIT(event_class_ftrace_##call.fields),\ 1622e33af02SSteven Rostedt }; \ 1632e33af02SSteven Rostedt \ 164e4a9ea5eSSteven Rostedt struct ftrace_event_call __used event_##call = { \ 165770cb243SSteven Rostedt .name = #call, \ 16632c0edaeSSteven Rostedt .event.type = etype, \ 1672e33af02SSteven Rostedt .class = &event_class_ftrace_##call, \ 168509e760cSLai Jiangshan .print_fmt = print, \ 169e1112b4dSTom Zanussi }; \ 170e4a9ea5eSSteven Rostedt struct ftrace_event_call __used \ 171e4a9ea5eSSteven Rostedt __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call; 172e1112b4dSTom Zanussi 1734e5292eaSSteven Rostedt #include "trace_entries.h" 174