| /* |
| * 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_seq_printf(s, "\tfield:" #type " " #item ";\t" \ |
| "offset:%zu;\tsize:%zu;\n", \ |
| offsetof(typeof(field), item), \ |
| sizeof(field.item)); \ |
| if (!ret) \ |
| return 0; |
| |
| #undef __field_desc |
| #define __field_desc(type, container, item) \ |
| ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \ |
| "offset:%zu;\tsize:%zu;\n", \ |
| offsetof(typeof(field), container.item), \ |
| sizeof(field.container.item)); \ |
| if (!ret) \ |
| return 0; |
| |
| #undef __array |
| #define __array(type, item, len) \ |
| ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t" \ |
| "offset:%zu;\tsize:%zu;\n", \ |
| offsetof(typeof(field), item), \ |
| sizeof(field.item)); \ |
| if (!ret) \ |
| return 0; |
| |
| #undef __array_desc |
| #define __array_desc(type, container, item, len) \ |
| ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t" \ |
| "offset:%zu;\tsize:%zu;\n", \ |
| offsetof(typeof(field), container.item), \ |
| sizeof(field.container.item)); \ |
| if (!ret) \ |
| return 0; |
| |
| #undef __dynamic_array |
| #define __dynamic_array(type, item) \ |
| ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \ |
| "offset:%zu;\tsize:0;\n", \ |
| offsetof(typeof(field), item)); \ |
| if (!ret) \ |
| return 0; |
| |
| #undef F_printk |
| #define F_printk(fmt, args...) "%s, %s\n", #fmt, __stringify(args) |
| |
| #undef __entry |
| #define __entry REC |
| |
| #undef FTRACE_ENTRY |
| #define FTRACE_ENTRY(name, struct_name, id, tstruct, print) \ |
| static int \ |
| ftrace_format_##name(struct ftrace_event_call *unused, \ |
| struct trace_seq *s) \ |
| { \ |
| struct struct_name field __attribute__((unused)); \ |
| int ret = 0; \ |
| \ |
| tstruct; \ |
| \ |
| trace_seq_printf(s, "\nprint fmt: " print); \ |
| \ |
| return ret; \ |
| } |
| |
| #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) \ |
| BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ |
| ret = trace_define_field(event_call, #type "[" #len "]", #item, \ |
| offsetof(typeof(field), item), \ |
| sizeof(field.item), 0, FILTER_OTHER); \ |
| if (ret) \ |
| return ret; |
| |
| #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), 0, \ |
| FILTER_OTHER); \ |
| if (ret) \ |
| return ret; |
| |
| #undef __dynamic_array |
| #define __dynamic_array(type, item) |
| |
| #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; \ |
| \ |
| ret = trace_define_common_fields(event_call); \ |
| if (ret) \ |
| return ret; \ |
| \ |
| tstruct; \ |
| \ |
| return ret; \ |
| } |
| |
| #include "trace_entries.h" |
| |
| |
| #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 FTRACE_ENTRY |
| #define FTRACE_ENTRY(call, struct_name, type, tstruct, print) \ |
| static int ftrace_raw_init_event_##call(void); \ |
| \ |
| struct ftrace_event_call __used \ |
| __attribute__((__aligned__(4))) \ |
| __attribute__((section("_ftrace_events"))) event_##call = { \ |
| .name = #call, \ |
| .id = type, \ |
| .system = __stringify(TRACE_SYSTEM), \ |
| .raw_init = ftrace_raw_init_event_##call, \ |
| .show_format = ftrace_format_##call, \ |
| .define_fields = ftrace_define_fields_##call, \ |
| }; \ |
| static int ftrace_raw_init_event_##call(void) \ |
| { \ |
| INIT_LIST_HEAD(&event_##call.fields); \ |
| return 0; \ |
| } \ |
| |
| #include "trace_entries.h" |