e8f9f4d79a
Add the struct ftrace_event_call as a parameter of its show_format() callback. This way we can use it from the syscall trace events to retrieve the syscall name from the ftrace event call parameter and describe its fields using the syscalls metadata. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Lai Jiangshan <laijs@cn.fujitsu.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Jiaying Zhang <jiayingz@google.com> Cc: Martin Bligh <mbligh@google.com> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Masami Hiramatsu <mhiramat@redhat.com> Cc: Jason Baron <jbaron@redhat.com>
209 lines
5.6 KiB
C
209 lines
5.6 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_STRUCT
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#define TRACE_STRUCT(args...) args
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extern void __bad_type_size(void);
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#undef TRACE_FIELD
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#define TRACE_FIELD(type, item, assign) \
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if (sizeof(type) != sizeof(field.item)) \
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__bad_type_size(); \
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ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \
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"offset:%u;\tsize:%u;\n", \
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(unsigned int)offsetof(typeof(field), item), \
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(unsigned int)sizeof(field.item)); \
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if (!ret) \
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return 0;
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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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ret = trace_seq_printf(s, "\tfield special:" #type_item ";\t" \
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"offset:%u;\tsize:%u;\n", \
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(unsigned int)offsetof(typeof(field), item), \
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(unsigned int)sizeof(field.item)); \
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if (!ret) \
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return 0;
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#undef TRACE_FIELD_ZERO_CHAR
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#define TRACE_FIELD_ZERO_CHAR(item) \
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ret = trace_seq_printf(s, "\tfield:char " #item ";\t" \
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"offset:%u;\tsize:0;\n", \
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(unsigned int)offsetof(typeof(field), item)); \
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if (!ret) \
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return 0;
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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_RAW_FMT
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#define TP_RAW_FMT(args...) args
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#undef TRACE_EVENT_FORMAT
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#define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt) \
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static int \
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ftrace_format_##call(struct ftrace_event_call *unused, \
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struct trace_seq *s) \
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{ \
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struct args field; \
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int ret; \
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\
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tstruct; \
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\
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trace_seq_printf(s, "\nprint fmt: \"%s\"\n", tpfmt); \
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\
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return ret; \
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}
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#undef TRACE_EVENT_FORMAT_NOFILTER
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#define TRACE_EVENT_FORMAT_NOFILTER(call, proto, args, fmt, tstruct, \
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tpfmt) \
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static int \
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ftrace_format_##call(struct ftrace_event_call *unused, \
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struct trace_seq *s) \
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{ \
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struct args field; \
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int ret; \
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\
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tstruct; \
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\
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trace_seq_printf(s, "\nprint fmt: \"%s\"\n", tpfmt); \
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\
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return ret; \
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}
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#include "trace_event_types.h"
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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 TRACE_EVENT_FORMAT
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#define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt) \
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int ftrace_define_fields_##call(void); \
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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 = proto, \
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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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init_preds(&event_##call); \
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return 0; \
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} \
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#undef TRACE_EVENT_FORMAT_NOFILTER
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#define TRACE_EVENT_FORMAT_NOFILTER(call, proto, args, fmt, tstruct, \
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tpfmt) \
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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 = proto, \
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.system = __stringify(TRACE_SYSTEM), \
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.show_format = ftrace_format_##call, \
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};
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#include "trace_event_types.h"
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#undef TRACE_FIELD
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#define TRACE_FIELD(type, item, assign) \
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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), is_signed_type(type)); \
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if (ret) \
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return ret;
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#undef TRACE_FIELD_SPECIAL
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#define TRACE_FIELD_SPECIAL(type, item, len, cmd) \
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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); \
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if (ret) \
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return ret;
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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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ret = trace_define_field(event_call, #type, #item, \
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offsetof(typeof(field), item), \
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sizeof(field.item), is_signed); \
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if (ret) \
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return ret;
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#undef TRACE_FIELD_ZERO_CHAR
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#define TRACE_FIELD_ZERO_CHAR(item)
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#undef TRACE_EVENT_FORMAT
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#define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt) \
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int \
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ftrace_define_fields_##call(void) \
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{ \
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struct ftrace_event_call *event_call = &event_##call; \
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struct args field; \
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int ret; \
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\
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__common_field(unsigned char, type, 0); \
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__common_field(unsigned char, flags, 0); \
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__common_field(unsigned char, preempt_count, 0); \
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__common_field(int, pid, 1); \
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__common_field(int, tgid, 1); \
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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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#undef TRACE_EVENT_FORMAT_NOFILTER
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#define TRACE_EVENT_FORMAT_NOFILTER(call, proto, args, fmt, tstruct, \
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tpfmt)
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#include "trace_event_types.h"
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