forked from luck/tmp_suning_uos_patched
4e5292ea1a
This patch changes the way the format files in debugfs/tracing/events/ftrace/*/format are created. It uses the new trace_entries.h file to automate the creation of the format files to ensure that they are always in sync with the actual structures. This is the same methodology used to create the format files for the TRACE_EVENT macro. This also updates the filter creation that was built on the creation of the format files. Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
222 lines
5.7 KiB
C
222 lines
5.7 KiB
C
/*
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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/debugfs.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 <linux/fs.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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/* 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) \
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ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \
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"offset:%zu;\tsize:%zu;\n", \
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offsetof(typeof(field), item), \
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sizeof(field.item)); \
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if (!ret) \
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return 0;
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#undef __field_desc
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#define __field_desc(type, container, item) \
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ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \
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"offset:%zu;\tsize:%zu;\n", \
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offsetof(typeof(field), container.item), \
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sizeof(field.container.item)); \
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if (!ret) \
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return 0;
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#undef __array
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#define __array(type, item, len) \
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ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t" \
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"offset:%zu;\tsize:%zu;\n", \
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offsetof(typeof(field), item), \
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sizeof(field.item)); \
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if (!ret) \
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return 0;
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#undef __array_desc
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#define __array_desc(type, container, item, len) \
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ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t" \
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"offset:%zu;\tsize:%zu;\n", \
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offsetof(typeof(field), container.item), \
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sizeof(field.container.item)); \
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if (!ret) \
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return 0;
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#undef __dynamic_array
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#define __dynamic_array(type, item) \
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ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \
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"offset:%zu;\tsize:0;\n", \
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offsetof(typeof(field), item)); \
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if (!ret) \
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return 0;
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#undef F_printk
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#define F_printk(fmt, args...) "%s, %s\n", #fmt, __stringify(args)
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#undef __entry
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#define __entry REC
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#undef FTRACE_ENTRY
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#define FTRACE_ENTRY(name, struct_name, id, tstruct, print) \
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static int \
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ftrace_format_##name(struct ftrace_event_call *unused, \
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struct trace_seq *s) \
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{ \
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struct struct_name field __attribute__((unused)); \
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int ret = 0; \
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\
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tstruct; \
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\
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trace_seq_printf(s, "\nprint fmt: " print); \
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\
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return ret; \
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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) \
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FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print))
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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_OTHER); \
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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_OTHER); \
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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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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), item), \
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sizeof(field.item), 0, FILTER_OTHER); \
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if (ret) \
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return ret;
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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), 0, \
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FILTER_OTHER); \
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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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#undef FTRACE_ENTRY
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#define FTRACE_ENTRY(name, struct_name, id, tstruct, print) \
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int \
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ftrace_define_fields_##name(struct ftrace_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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\
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ret = trace_define_common_fields(event_call); \
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if (ret) \
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return ret; \
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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 __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 TRACE_ZERO_CHAR
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#define TRACE_ZERO_CHAR(arg)
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#undef TRACE_FIELD
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#define TRACE_FIELD(type, item, assign)\
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entry->item = assign;
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#undef TRACE_FIELD
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#define TRACE_FIELD(type, item, assign)\
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entry->item = assign;
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#undef TRACE_FIELD_SIGN
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#define TRACE_FIELD_SIGN(type, item, assign, is_signed) \
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TRACE_FIELD(type, item, assign)
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#undef TP_CMD
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#define TP_CMD(cmd...) cmd
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#undef TRACE_ENTRY
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#define TRACE_ENTRY entry
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#undef TRACE_FIELD_SPECIAL
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#define TRACE_FIELD_SPECIAL(type_item, item, len, cmd) \
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cmd;
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#undef FTRACE_ENTRY
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#define FTRACE_ENTRY(call, struct_name, type, tstruct, print) \
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static int ftrace_raw_init_event_##call(void); \
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\
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struct ftrace_event_call __used \
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__attribute__((__aligned__(4))) \
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__attribute__((section("_ftrace_events"))) event_##call = { \
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.name = #call, \
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.id = type, \
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.system = __stringify(TRACE_SYSTEM), \
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.raw_init = ftrace_raw_init_event_##call, \
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.show_format = ftrace_format_##call, \
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.define_fields = ftrace_define_fields_##call, \
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}; \
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static int ftrace_raw_init_event_##call(void) \
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{ \
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INIT_LIST_HEAD(&event_##call.fields); \
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return 0; \
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} \
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#include "trace_entries.h"
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