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 21e59a0bffSJiri Olsa /* 22e59a0bffSJiri Olsa * The FTRACE_ENTRY_REG macro allows ftrace entry to define register 23e59a0bffSJiri Olsa * function and thus become accesible via perf. 24e59a0bffSJiri Olsa */ 25e59a0bffSJiri Olsa #undef FTRACE_ENTRY_REG 2602aa3162SJiri Olsa #define FTRACE_ENTRY_REG(name, struct_name, id, tstruct, print, \ 2702aa3162SJiri Olsa filter, regfn) \ 2802aa3162SJiri Olsa FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print), \ 2902aa3162SJiri Olsa filter) 30e59a0bffSJiri Olsa 314e5292eaSSteven Rostedt /* not needed for this file */ 324e5292eaSSteven Rostedt #undef __field_struct 334e5292eaSSteven Rostedt #define __field_struct(type, item) 34da4d0302SSteven Rostedt 354e5292eaSSteven Rostedt #undef __field 3605ffa2d0SLi Zefan #define __field(type, item) type item; 3705ffa2d0SLi Zefan 3805ffa2d0SLi Zefan #undef __field_desc 3905ffa2d0SLi Zefan #define __field_desc(type, container, item) type item; 4005ffa2d0SLi Zefan 4105ffa2d0SLi Zefan #undef __array 4205ffa2d0SLi Zefan #define __array(type, item, size) type item[size]; 4305ffa2d0SLi Zefan 4405ffa2d0SLi Zefan #undef __array_desc 4505ffa2d0SLi Zefan #define __array_desc(type, container, item, size) type item[size]; 4605ffa2d0SLi Zefan 4705ffa2d0SLi Zefan #undef __dynamic_array 4805ffa2d0SLi Zefan #define __dynamic_array(type, item) type item[]; 4905ffa2d0SLi Zefan 5005ffa2d0SLi Zefan #undef F_STRUCT 5105ffa2d0SLi Zefan #define F_STRUCT(args...) args 5205ffa2d0SLi Zefan 5305ffa2d0SLi Zefan #undef F_printk 5405ffa2d0SLi Zefan #define F_printk(fmt, args...) fmt, args 5505ffa2d0SLi Zefan 5605ffa2d0SLi Zefan #undef FTRACE_ENTRY 5702aa3162SJiri Olsa #define FTRACE_ENTRY(name, struct_name, id, tstruct, print, filter) \ 5805ffa2d0SLi Zefan struct ____ftrace_##name { \ 5905ffa2d0SLi Zefan tstruct \ 6005ffa2d0SLi Zefan }; \ 615e9b3972SLi Zefan static void __always_unused ____ftrace_check_##name(void) \ 6205ffa2d0SLi Zefan { \ 6305ffa2d0SLi Zefan struct ____ftrace_##name *__entry = NULL; \ 6405ffa2d0SLi Zefan \ 655e9b3972SLi Zefan /* force compile-time check on F_printk() */ \ 6605ffa2d0SLi Zefan printk(print); \ 6705ffa2d0SLi Zefan } 6805ffa2d0SLi Zefan 6905ffa2d0SLi Zefan #undef FTRACE_ENTRY_DUP 7002aa3162SJiri Olsa #define FTRACE_ENTRY_DUP(name, struct_name, id, tstruct, print, filter) \ 7102aa3162SJiri Olsa FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print), \ 7202aa3162SJiri Olsa filter) 7305ffa2d0SLi Zefan 7405ffa2d0SLi Zefan #include "trace_entries.h" 7505ffa2d0SLi Zefan 764e5292eaSSteven Rostedt #undef __field 774e5292eaSSteven Rostedt #define __field(type, item) \ 784e5292eaSSteven Rostedt ret = trace_define_field(event_call, #type, #item, \ 794e5292eaSSteven Rostedt offsetof(typeof(field), item), \ 804e5292eaSSteven Rostedt sizeof(field.item), \ 8102aa3162SJiri Olsa is_signed_type(type), filter_type); \ 824e5292eaSSteven Rostedt if (ret) \ 834e5292eaSSteven Rostedt return ret; 844e5292eaSSteven Rostedt 854e5292eaSSteven Rostedt #undef __field_desc 864e5292eaSSteven Rostedt #define __field_desc(type, container, item) \ 874e5292eaSSteven Rostedt ret = trace_define_field(event_call, #type, #item, \ 884e5292eaSSteven Rostedt offsetof(typeof(field), \ 894e5292eaSSteven Rostedt container.item), \ 904e5292eaSSteven Rostedt sizeof(field.container.item), \ 9102aa3162SJiri Olsa is_signed_type(type), filter_type); \ 924e5292eaSSteven Rostedt if (ret) \ 934e5292eaSSteven Rostedt return ret; 944e5292eaSSteven Rostedt 954e5292eaSSteven Rostedt #undef __array 964e5292eaSSteven Rostedt #define __array(type, item, len) \ 9704295780SSteven Rostedt do { \ 984e5292eaSSteven Rostedt BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ 9904295780SSteven Rostedt mutex_lock(&event_storage_mutex); \ 10004295780SSteven Rostedt snprintf(event_storage, sizeof(event_storage), \ 10104295780SSteven Rostedt "%s[%d]", #type, len); \ 10204295780SSteven Rostedt ret = trace_define_field(event_call, event_storage, #item, \ 1034e5292eaSSteven Rostedt offsetof(typeof(field), item), \ 104fb7ae981SLai Jiangshan sizeof(field.item), \ 10502aa3162SJiri Olsa is_signed_type(type), filter_type); \ 10604295780SSteven Rostedt mutex_unlock(&event_storage_mutex); \ 1074e5292eaSSteven Rostedt if (ret) \ 10804295780SSteven Rostedt return ret; \ 10904295780SSteven Rostedt } while (0); 1104e5292eaSSteven Rostedt 1114e5292eaSSteven Rostedt #undef __array_desc 1124e5292eaSSteven Rostedt #define __array_desc(type, container, item, len) \ 1134e5292eaSSteven Rostedt BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ 1144e5292eaSSteven Rostedt ret = trace_define_field(event_call, #type "[" #len "]", #item, \ 1154e5292eaSSteven Rostedt offsetof(typeof(field), \ 1164e5292eaSSteven Rostedt container.item), \ 117fb7ae981SLai Jiangshan sizeof(field.container.item), \ 11802aa3162SJiri Olsa is_signed_type(type), filter_type); \ 1194e5292eaSSteven Rostedt if (ret) \ 1204e5292eaSSteven Rostedt return ret; 1214e5292eaSSteven Rostedt 1224e5292eaSSteven Rostedt #undef __dynamic_array 123809826a3SLai Jiangshan #define __dynamic_array(type, item) \ 124809826a3SLai Jiangshan ret = trace_define_field(event_call, #type, #item, \ 125809826a3SLai Jiangshan offsetof(typeof(field), item), \ 12602aa3162SJiri Olsa 0, is_signed_type(type), filter_type);\ 127809826a3SLai Jiangshan if (ret) \ 128809826a3SLai Jiangshan return ret; 1294e5292eaSSteven Rostedt 1304e5292eaSSteven Rostedt #undef FTRACE_ENTRY 13102aa3162SJiri Olsa #define FTRACE_ENTRY(name, struct_name, id, tstruct, print, filter) \ 1327e4f44b1SLi Zefan static int __init \ 1334e5292eaSSteven Rostedt ftrace_define_fields_##name(struct ftrace_event_call *event_call) \ 134e45f2e2bSTom Zanussi { \ 1354e5292eaSSteven Rostedt struct struct_name field; \ 136e45f2e2bSTom Zanussi int ret; \ 13702aa3162SJiri Olsa int filter_type = filter; \ 138e45f2e2bSTom Zanussi \ 1394e5292eaSSteven Rostedt tstruct; \ 140e45f2e2bSTom Zanussi \ 141e45f2e2bSTom Zanussi return ret; \ 142e45f2e2bSTom Zanussi } 143e45f2e2bSTom Zanussi 1444e5292eaSSteven Rostedt #include "trace_entries.h" 1454e5292eaSSteven Rostedt 146509e760cSLai Jiangshan #undef __entry 147509e760cSLai Jiangshan #define __entry REC 148509e760cSLai Jiangshan 1494e5292eaSSteven Rostedt #undef __field 1504e5292eaSSteven Rostedt #define __field(type, item) 1514e5292eaSSteven Rostedt 1524e5292eaSSteven Rostedt #undef __field_desc 1534e5292eaSSteven Rostedt #define __field_desc(type, container, item) 1544e5292eaSSteven Rostedt 1554e5292eaSSteven Rostedt #undef __array 1564e5292eaSSteven Rostedt #define __array(type, item, len) 1574e5292eaSSteven Rostedt 1584e5292eaSSteven Rostedt #undef __array_desc 1594e5292eaSSteven Rostedt #define __array_desc(type, container, item, len) 1604e5292eaSSteven Rostedt 1614e5292eaSSteven Rostedt #undef __dynamic_array 1624e5292eaSSteven Rostedt #define __dynamic_array(type, item) 1634e5292eaSSteven Rostedt 164509e760cSLai Jiangshan #undef F_printk 16501de982aSWolfgang Mauerer #define F_printk(fmt, args...) __stringify(fmt) ", " __stringify(args) 166509e760cSLai Jiangshan 167e59a0bffSJiri Olsa #undef FTRACE_ENTRY_REG 16802aa3162SJiri Olsa #define FTRACE_ENTRY_REG(call, struct_name, etype, tstruct, print, filter,\ 16902aa3162SJiri Olsa regfn) \ 170770cb243SSteven Rostedt \ 1712e33af02SSteven Rostedt struct ftrace_event_class event_class_ftrace_##call = { \ 1722e33af02SSteven Rostedt .system = __stringify(TRACE_SYSTEM), \ 1732e33af02SSteven Rostedt .define_fields = ftrace_define_fields_##call, \ 174ffb9f995SLi Zefan .fields = LIST_HEAD_INIT(event_class_ftrace_##call.fields),\ 175e59a0bffSJiri Olsa .reg = regfn, \ 1762e33af02SSteven Rostedt }; \ 1772e33af02SSteven Rostedt \ 178e4a9ea5eSSteven Rostedt struct ftrace_event_call __used event_##call = { \ 179770cb243SSteven Rostedt .name = #call, \ 18032c0edaeSSteven Rostedt .event.type = etype, \ 1812e33af02SSteven Rostedt .class = &event_class_ftrace_##call, \ 182509e760cSLai Jiangshan .print_fmt = print, \ 1839b63776fSSteven Rostedt .flags = TRACE_EVENT_FL_IGNORE_ENABLE, \ 184e1112b4dSTom Zanussi }; \ 185e4a9ea5eSSteven Rostedt struct ftrace_event_call __used \ 186e4a9ea5eSSteven Rostedt __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call; 187e1112b4dSTom Zanussi 188e59a0bffSJiri Olsa #undef FTRACE_ENTRY 18902aa3162SJiri Olsa #define FTRACE_ENTRY(call, struct_name, etype, tstruct, print, filter) \ 190e59a0bffSJiri Olsa FTRACE_ENTRY_REG(call, struct_name, etype, \ 19102aa3162SJiri Olsa PARAMS(tstruct), PARAMS(print), filter, NULL) 192e59a0bffSJiri Olsa 193ced39002SJiri Olsa int ftrace_event_is_function(struct ftrace_event_call *call) 194ced39002SJiri Olsa { 195ced39002SJiri Olsa return call == &event_function; 196ced39002SJiri Olsa } 197ced39002SJiri Olsa 1984e5292eaSSteven Rostedt #include "trace_entries.h" 199