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195 lines
5.1 KiB
195 lines
5.1 KiB
/* |
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* trace_export.c - export basic ftrace utilities to user space |
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* |
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* Copyright (C) 2009 Steven Rostedt <srostedt@redhat.com> |
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*/ |
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#include <linux/stringify.h> |
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#include <linux/kallsyms.h> |
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#include <linux/seq_file.h> |
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#include <linux/uaccess.h> |
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#include <linux/ftrace.h> |
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include "trace_output.h" |
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#undef TRACE_SYSTEM |
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#define TRACE_SYSTEM ftrace |
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/* |
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* The FTRACE_ENTRY_REG macro allows ftrace entry to define register |
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* function and thus become accesible via perf. |
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*/ |
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#undef FTRACE_ENTRY_REG |
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#define FTRACE_ENTRY_REG(name, struct_name, id, tstruct, print, \ |
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filter, regfn) \ |
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FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print), \ |
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filter) |
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/* not needed for this file */ |
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#undef __field_struct |
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#define __field_struct(type, item) |
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#undef __field |
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#define __field(type, item) type item; |
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#undef __field_desc |
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#define __field_desc(type, container, item) type item; |
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#undef __array |
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#define __array(type, item, size) type item[size]; |
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#undef __array_desc |
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#define __array_desc(type, container, item, size) type item[size]; |
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#undef __dynamic_array |
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#define __dynamic_array(type, item) type item[]; |
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#undef F_STRUCT |
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#define F_STRUCT(args...) args |
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#undef F_printk |
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#define F_printk(fmt, args...) fmt, args |
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#undef FTRACE_ENTRY |
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#define FTRACE_ENTRY(name, struct_name, id, tstruct, print, filter) \ |
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struct ____ftrace_##name { \ |
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tstruct \ |
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}; \ |
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static void __always_unused ____ftrace_check_##name(void) \ |
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{ \ |
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struct ____ftrace_##name *__entry = NULL; \ |
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\ |
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/* force compile-time check on F_printk() */ \ |
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printk(print); \ |
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} |
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#undef FTRACE_ENTRY_DUP |
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#define FTRACE_ENTRY_DUP(name, struct_name, id, tstruct, print, filter) \ |
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FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print), \ |
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filter) |
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#include "trace_entries.h" |
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#undef __field |
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#define __field(type, item) \ |
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ret = trace_define_field(event_call, #type, #item, \ |
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offsetof(typeof(field), item), \ |
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sizeof(field.item), \ |
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is_signed_type(type), filter_type); \ |
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if (ret) \ |
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return ret; |
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#undef __field_desc |
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#define __field_desc(type, container, item) \ |
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ret = trace_define_field(event_call, #type, #item, \ |
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offsetof(typeof(field), \ |
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container.item), \ |
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sizeof(field.container.item), \ |
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is_signed_type(type), filter_type); \ |
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if (ret) \ |
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return ret; |
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#undef __array |
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#define __array(type, item, len) \ |
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do { \ |
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char *type_str = #type"["__stringify(len)"]"; \ |
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BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ |
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ret = trace_define_field(event_call, type_str, #item, \ |
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offsetof(typeof(field), item), \ |
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sizeof(field.item), \ |
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is_signed_type(type), filter_type); \ |
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if (ret) \ |
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return ret; \ |
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} while (0); |
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#undef __array_desc |
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#define __array_desc(type, container, item, len) \ |
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BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ |
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ret = trace_define_field(event_call, #type "[" #len "]", #item, \ |
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offsetof(typeof(field), \ |
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container.item), \ |
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sizeof(field.container.item), \ |
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is_signed_type(type), filter_type); \ |
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if (ret) \ |
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return ret; |
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#undef __dynamic_array |
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#define __dynamic_array(type, item) \ |
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ret = trace_define_field(event_call, #type, #item, \ |
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offsetof(typeof(field), item), \ |
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0, is_signed_type(type), filter_type);\ |
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if (ret) \ |
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return ret; |
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#undef FTRACE_ENTRY |
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#define FTRACE_ENTRY(name, struct_name, id, tstruct, print, filter) \ |
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static int __init \ |
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ftrace_define_fields_##name(struct trace_event_call *event_call) \ |
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{ \ |
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struct struct_name field; \ |
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int ret; \ |
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int filter_type = filter; \ |
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\ |
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tstruct; \ |
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\ |
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return ret; \ |
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} |
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#include "trace_entries.h" |
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#undef __entry |
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#define __entry REC |
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#undef __field |
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#define __field(type, item) |
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#undef __field_desc |
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#define __field_desc(type, container, item) |
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#undef __array |
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#define __array(type, item, len) |
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#undef __array_desc |
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#define __array_desc(type, container, item, len) |
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#undef __dynamic_array |
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#define __dynamic_array(type, item) |
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#undef F_printk |
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#define F_printk(fmt, args...) __stringify(fmt) ", " __stringify(args) |
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#undef FTRACE_ENTRY_REG |
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#define FTRACE_ENTRY_REG(call, struct_name, etype, tstruct, print, filter,\ |
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regfn) \ |
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\ |
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struct trace_event_class __refdata event_class_ftrace_##call = { \ |
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.system = __stringify(TRACE_SYSTEM), \ |
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.define_fields = ftrace_define_fields_##call, \ |
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.fields = LIST_HEAD_INIT(event_class_ftrace_##call.fields),\ |
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.reg = regfn, \ |
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}; \ |
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\ |
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struct trace_event_call __used event_##call = { \ |
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.class = &event_class_ftrace_##call, \ |
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{ \ |
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.name = #call, \ |
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}, \ |
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.event.type = etype, \ |
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.print_fmt = print, \ |
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.flags = TRACE_EVENT_FL_IGNORE_ENABLE, \ |
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}; \ |
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struct trace_event_call __used \ |
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__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call; |
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#undef FTRACE_ENTRY |
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#define FTRACE_ENTRY(call, struct_name, etype, tstruct, print, filter) \ |
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FTRACE_ENTRY_REG(call, struct_name, etype, \ |
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PARAMS(tstruct), PARAMS(print), filter, NULL) |
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bool ftrace_event_is_function(struct trace_event_call *call) |
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{ |
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return call == &event_function; |
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} |
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#include "trace_entries.h"
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