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/uaccess.h> 10770cb243SSteven Rostedt #include <linux/ftrace.h> 11770cb243SSteven Rostedt #include <linux/module.h> 12770cb243SSteven Rostedt #include <linux/init.h> 13770cb243SSteven Rostedt 14770cb243SSteven Rostedt #include "trace_output.h" 15770cb243SSteven Rostedt 164e5292eaSSteven Rostedt #undef TRACE_SYSTEM 174e5292eaSSteven Rostedt #define TRACE_SYSTEM ftrace 18da4d0302SSteven Rostedt 19e59a0bffSJiri Olsa /* 20e59a0bffSJiri Olsa * The FTRACE_ENTRY_REG macro allows ftrace entry to define register 21e59a0bffSJiri Olsa * function and thus become accesible via perf. 22e59a0bffSJiri Olsa */ 23e59a0bffSJiri Olsa #undef FTRACE_ENTRY_REG 2402aa3162SJiri Olsa #define FTRACE_ENTRY_REG(name, struct_name, id, tstruct, print, \ 2502aa3162SJiri Olsa filter, regfn) \ 2602aa3162SJiri Olsa FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print), \ 2702aa3162SJiri Olsa filter) 28e59a0bffSJiri Olsa 294e5292eaSSteven Rostedt /* not needed for this file */ 304e5292eaSSteven Rostedt #undef __field_struct 314e5292eaSSteven Rostedt #define __field_struct(type, item) 32da4d0302SSteven Rostedt 334e5292eaSSteven Rostedt #undef __field 3405ffa2d0SLi Zefan #define __field(type, item) type item; 3505ffa2d0SLi Zefan 3605ffa2d0SLi Zefan #undef __field_desc 3705ffa2d0SLi Zefan #define __field_desc(type, container, item) type item; 3805ffa2d0SLi Zefan 3905ffa2d0SLi Zefan #undef __array 4005ffa2d0SLi Zefan #define __array(type, item, size) type item[size]; 4105ffa2d0SLi Zefan 4205ffa2d0SLi Zefan #undef __array_desc 4305ffa2d0SLi Zefan #define __array_desc(type, container, item, size) type item[size]; 4405ffa2d0SLi Zefan 4505ffa2d0SLi Zefan #undef __dynamic_array 4605ffa2d0SLi Zefan #define __dynamic_array(type, item) type item[]; 4705ffa2d0SLi Zefan 4805ffa2d0SLi Zefan #undef F_STRUCT 4905ffa2d0SLi Zefan #define F_STRUCT(args...) args 5005ffa2d0SLi Zefan 5105ffa2d0SLi Zefan #undef F_printk 5205ffa2d0SLi Zefan #define F_printk(fmt, args...) fmt, args 5305ffa2d0SLi Zefan 5405ffa2d0SLi Zefan #undef FTRACE_ENTRY 5502aa3162SJiri Olsa #define FTRACE_ENTRY(name, struct_name, id, tstruct, print, filter) \ 5605ffa2d0SLi Zefan struct ____ftrace_##name { \ 5705ffa2d0SLi Zefan tstruct \ 5805ffa2d0SLi Zefan }; \ 595e9b3972SLi Zefan static void __always_unused ____ftrace_check_##name(void) \ 6005ffa2d0SLi Zefan { \ 6105ffa2d0SLi Zefan struct ____ftrace_##name *__entry = NULL; \ 6205ffa2d0SLi Zefan \ 635e9b3972SLi Zefan /* force compile-time check on F_printk() */ \ 6405ffa2d0SLi Zefan printk(print); \ 6505ffa2d0SLi Zefan } 6605ffa2d0SLi Zefan 6705ffa2d0SLi Zefan #undef FTRACE_ENTRY_DUP 6802aa3162SJiri Olsa #define FTRACE_ENTRY_DUP(name, struct_name, id, tstruct, print, filter) \ 6902aa3162SJiri Olsa FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print), \ 7002aa3162SJiri Olsa filter) 7105ffa2d0SLi Zefan 7205ffa2d0SLi Zefan #include "trace_entries.h" 7305ffa2d0SLi Zefan 744e5292eaSSteven Rostedt #undef __field 754e5292eaSSteven Rostedt #define __field(type, item) \ 764e5292eaSSteven Rostedt ret = trace_define_field(event_call, #type, #item, \ 774e5292eaSSteven Rostedt offsetof(typeof(field), item), \ 784e5292eaSSteven Rostedt sizeof(field.item), \ 7902aa3162SJiri Olsa is_signed_type(type), filter_type); \ 804e5292eaSSteven Rostedt if (ret) \ 814e5292eaSSteven Rostedt return ret; 824e5292eaSSteven Rostedt 834e5292eaSSteven Rostedt #undef __field_desc 844e5292eaSSteven Rostedt #define __field_desc(type, container, item) \ 854e5292eaSSteven Rostedt ret = trace_define_field(event_call, #type, #item, \ 864e5292eaSSteven Rostedt offsetof(typeof(field), \ 874e5292eaSSteven Rostedt container.item), \ 884e5292eaSSteven Rostedt sizeof(field.container.item), \ 8902aa3162SJiri Olsa is_signed_type(type), filter_type); \ 904e5292eaSSteven Rostedt if (ret) \ 914e5292eaSSteven Rostedt return ret; 924e5292eaSSteven Rostedt 934e5292eaSSteven Rostedt #undef __array 944e5292eaSSteven Rostedt #define __array(type, item, len) \ 9504295780SSteven Rostedt do { \ 9687291347SVaibhav Nagarnaik char *type_str = #type"["__stringify(len)"]"; \ 974e5292eaSSteven Rostedt BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ 9887291347SVaibhav Nagarnaik ret = trace_define_field(event_call, type_str, #item, \ 994e5292eaSSteven Rostedt offsetof(typeof(field), item), \ 100fb7ae981SLai Jiangshan sizeof(field.item), \ 10102aa3162SJiri Olsa is_signed_type(type), filter_type); \ 1024e5292eaSSteven Rostedt if (ret) \ 10304295780SSteven Rostedt return ret; \ 10404295780SSteven Rostedt } while (0); 1054e5292eaSSteven Rostedt 1064e5292eaSSteven Rostedt #undef __array_desc 1074e5292eaSSteven Rostedt #define __array_desc(type, container, item, len) \ 1084e5292eaSSteven Rostedt BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ 1094e5292eaSSteven Rostedt ret = trace_define_field(event_call, #type "[" #len "]", #item, \ 1104e5292eaSSteven Rostedt offsetof(typeof(field), \ 1114e5292eaSSteven Rostedt container.item), \ 112fb7ae981SLai Jiangshan sizeof(field.container.item), \ 11302aa3162SJiri Olsa is_signed_type(type), filter_type); \ 1144e5292eaSSteven Rostedt if (ret) \ 1154e5292eaSSteven Rostedt return ret; 1164e5292eaSSteven Rostedt 1174e5292eaSSteven Rostedt #undef __dynamic_array 118809826a3SLai Jiangshan #define __dynamic_array(type, item) \ 119809826a3SLai Jiangshan ret = trace_define_field(event_call, #type, #item, \ 120809826a3SLai Jiangshan offsetof(typeof(field), item), \ 12102aa3162SJiri Olsa 0, is_signed_type(type), filter_type);\ 122809826a3SLai Jiangshan if (ret) \ 123809826a3SLai Jiangshan return ret; 1244e5292eaSSteven Rostedt 1254e5292eaSSteven Rostedt #undef FTRACE_ENTRY 12602aa3162SJiri Olsa #define FTRACE_ENTRY(name, struct_name, id, tstruct, print, filter) \ 1277e4f44b1SLi Zefan static int __init \ 1282425bcb9SSteven Rostedt (Red Hat) ftrace_define_fields_##name(struct trace_event_call *event_call) \ 129e45f2e2bSTom Zanussi { \ 1304e5292eaSSteven Rostedt struct struct_name field; \ 131e45f2e2bSTom Zanussi int ret; \ 13202aa3162SJiri Olsa int filter_type = filter; \ 133e45f2e2bSTom Zanussi \ 1344e5292eaSSteven Rostedt tstruct; \ 135e45f2e2bSTom Zanussi \ 136e45f2e2bSTom Zanussi return ret; \ 137e45f2e2bSTom Zanussi } 138e45f2e2bSTom Zanussi 1394e5292eaSSteven Rostedt #include "trace_entries.h" 1404e5292eaSSteven Rostedt 141509e760cSLai Jiangshan #undef __entry 142509e760cSLai Jiangshan #define __entry REC 143509e760cSLai Jiangshan 1444e5292eaSSteven Rostedt #undef __field 1454e5292eaSSteven Rostedt #define __field(type, item) 1464e5292eaSSteven Rostedt 1474e5292eaSSteven Rostedt #undef __field_desc 1484e5292eaSSteven Rostedt #define __field_desc(type, container, item) 1494e5292eaSSteven Rostedt 1504e5292eaSSteven Rostedt #undef __array 1514e5292eaSSteven Rostedt #define __array(type, item, len) 1524e5292eaSSteven Rostedt 1534e5292eaSSteven Rostedt #undef __array_desc 1544e5292eaSSteven Rostedt #define __array_desc(type, container, item, len) 1554e5292eaSSteven Rostedt 1564e5292eaSSteven Rostedt #undef __dynamic_array 1574e5292eaSSteven Rostedt #define __dynamic_array(type, item) 1584e5292eaSSteven Rostedt 159509e760cSLai Jiangshan #undef F_printk 16001de982aSWolfgang Mauerer #define F_printk(fmt, args...) __stringify(fmt) ", " __stringify(args) 161509e760cSLai Jiangshan 162e59a0bffSJiri Olsa #undef FTRACE_ENTRY_REG 16302aa3162SJiri Olsa #define FTRACE_ENTRY_REG(call, struct_name, etype, tstruct, print, filter,\ 16402aa3162SJiri Olsa regfn) \ 165770cb243SSteven Rostedt \ 1662425bcb9SSteven Rostedt (Red Hat) struct trace_event_class __refdata event_class_ftrace_##call = { \ 1672e33af02SSteven Rostedt .system = __stringify(TRACE_SYSTEM), \ 1682e33af02SSteven Rostedt .define_fields = ftrace_define_fields_##call, \ 169ffb9f995SLi Zefan .fields = LIST_HEAD_INIT(event_class_ftrace_##call.fields),\ 170e59a0bffSJiri Olsa .reg = regfn, \ 1712e33af02SSteven Rostedt }; \ 1722e33af02SSteven Rostedt \ 1732425bcb9SSteven Rostedt (Red Hat) struct trace_event_call __used event_##call = { \ 1742e33af02SSteven Rostedt .class = &event_class_ftrace_##call, \ 175abb43f69SMathieu Desnoyers { \ 176abb43f69SMathieu Desnoyers .name = #call, \ 177abb43f69SMathieu Desnoyers }, \ 178abb43f69SMathieu Desnoyers .event.type = etype, \ 179509e760cSLai Jiangshan .print_fmt = print, \ 180754cb007SHe Kuang .flags = TRACE_EVENT_FL_IGNORE_ENABLE, \ 181e1112b4dSTom Zanussi }; \ 1822425bcb9SSteven Rostedt (Red Hat) struct trace_event_call __used \ 183e4a9ea5eSSteven Rostedt __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call; 184e1112b4dSTom Zanussi 185e59a0bffSJiri Olsa #undef FTRACE_ENTRY 18602aa3162SJiri Olsa #define FTRACE_ENTRY(call, struct_name, etype, tstruct, print, filter) \ 187e59a0bffSJiri Olsa FTRACE_ENTRY_REG(call, struct_name, etype, \ 18802aa3162SJiri Olsa PARAMS(tstruct), PARAMS(print), filter, NULL) 189e59a0bffSJiri Olsa 1902425bcb9SSteven Rostedt (Red Hat) int ftrace_event_is_function(struct trace_event_call *call) 191ced39002SJiri Olsa { 192ced39002SJiri Olsa return call == &event_function; 193ced39002SJiri Olsa } 194ced39002SJiri Olsa 1954e5292eaSSteven Rostedt #include "trace_entries.h" 196