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tracing/events: move the ftrace event tracing code to core
This patch moves the ftrace creation into include/trace/ftrace.h and simplifies the work of developers in adding new tracepoints. Just the act of creating the trace points in include/trace and including define_trace.h will create the events in the debugfs/tracing/events directory. This patch removes the need of include/trace/trace_events.h Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt
Steven Rostedt
parent
97f2025153
commit
f42c85e74f
@ -56,6 +56,10 @@
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#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
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#ifdef CONFIG_EVENT_TRACER
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#include <trace/ftrace.h>
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#endif
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#undef TRACE_HEADER_MULTI_READ
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/* Only undef what we defined in this file */
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@ -1,3 +1,216 @@
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/*
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* Stage 1 of the trace events.
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*
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* Override the macros in <trace/trace_events.h> to include the following:
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*
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* struct ftrace_raw_<call> {
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* struct trace_entry ent;
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* <type> <item>;
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* <type2> <item2>[<len>];
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* [...]
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* };
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*
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* The <type> <item> is created by the __field(type, item) macro or
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* the __array(type2, item2, len) macro.
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* We simply do "type item;", and that will create the fields
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* in the structure.
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*/
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#include <linux/ftrace_event.h>
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#undef TRACE_FORMAT
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#define TRACE_FORMAT(call, proto, args, fmt)
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#undef __array
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#define __array(type, item, len) type item[len];
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#undef __field
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#define __field(type, item) type item;
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#undef TP_STRUCT__entry
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#define TP_STRUCT__entry(args...) args
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#undef TRACE_EVENT
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#define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
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struct ftrace_raw_##name { \
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struct trace_entry ent; \
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tstruct \
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}; \
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static struct ftrace_event_call event_##name
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#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
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/*
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* Stage 2 of the trace events.
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*
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* Override the macros in <trace/trace_events.h> to include the following:
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*
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* enum print_line_t
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* ftrace_raw_output_<call>(struct trace_iterator *iter, int flags)
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* {
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* struct trace_seq *s = &iter->seq;
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* struct ftrace_raw_<call> *field; <-- defined in stage 1
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* struct trace_entry *entry;
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* int ret;
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*
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* entry = iter->ent;
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*
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* if (entry->type != event_<call>.id) {
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* WARN_ON_ONCE(1);
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* return TRACE_TYPE_UNHANDLED;
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* }
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*
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* field = (typeof(field))entry;
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*
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* ret = trace_seq_printf(s, <TP_printk> "\n");
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* if (!ret)
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* return TRACE_TYPE_PARTIAL_LINE;
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*
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* return TRACE_TYPE_HANDLED;
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* }
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*
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* This is the method used to print the raw event to the trace
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* output format. Note, this is not needed if the data is read
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* in binary.
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*/
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#undef __entry
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#define __entry field
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#undef TP_printk
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#define TP_printk(fmt, args...) fmt "\n", args
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#undef TRACE_EVENT
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#define TRACE_EVENT(call, proto, args, tstruct, assign, print) \
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enum print_line_t \
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ftrace_raw_output_##call(struct trace_iterator *iter, int flags) \
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{ \
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struct trace_seq *s = &iter->seq; \
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struct ftrace_raw_##call *field; \
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struct trace_entry *entry; \
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int ret; \
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\
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entry = iter->ent; \
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\
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if (entry->type != event_##call.id) { \
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WARN_ON_ONCE(1); \
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return TRACE_TYPE_UNHANDLED; \
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} \
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\
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field = (typeof(field))entry; \
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\
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ret = trace_seq_printf(s, #call ": " print); \
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if (!ret) \
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return TRACE_TYPE_PARTIAL_LINE; \
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\
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return TRACE_TYPE_HANDLED; \
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}
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#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
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/*
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* Setup the showing format of trace point.
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*
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* int
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* ftrace_format_##call(struct trace_seq *s)
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* {
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* struct ftrace_raw_##call field;
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* int ret;
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*
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* ret = trace_seq_printf(s, #type " " #item ";"
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* " offset:%u; size:%u;\n",
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* offsetof(struct ftrace_raw_##call, item),
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* sizeof(field.type));
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*
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* }
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*/
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#undef TP_STRUCT__entry
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#define TP_STRUCT__entry(args...) args
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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:%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 __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:%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 __entry
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#define __entry REC
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#undef TP_printk
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#define TP_printk(fmt, args...) "%s, %s\n", #fmt, __stringify(args)
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#undef TP_fast_assign
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#define TP_fast_assign(args...) args
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#undef TRACE_EVENT
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#define TRACE_EVENT(call, proto, args, tstruct, func, print) \
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static int \
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ftrace_format_##call(struct trace_seq *s) \
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{ \
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struct ftrace_raw_##call 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: " print); \
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\
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return ret; \
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}
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#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
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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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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)); \
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if (ret) \
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return ret;
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#undef TRACE_EVENT
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#define TRACE_EVENT(call, proto, args, tstruct, func, print) \
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int \
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ftrace_define_fields_##call(void) \
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{ \
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struct ftrace_raw_##call field; \
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struct ftrace_event_call *event_call = &event_##call; \
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int ret; \
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\
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__common_field(unsigned char, type); \
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__common_field(unsigned char, flags); \
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__common_field(unsigned char, preempt_count); \
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__common_field(int, pid); \
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__common_field(int, tgid); \
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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_INCLUDE(TRACE_INCLUDE_FILE)
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/*
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* Stage 3 of the trace events.
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*
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@ -272,7 +485,7 @@ __attribute__((section("_ftrace_events"))) event_##call = { \
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_TRACE_PROFILE_INIT(call) \
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}
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#include <trace/trace_events.h>
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#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
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#undef _TRACE_PROFILE
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#undef _TRACE_PROFILE_INIT
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@ -1,7 +0,0 @@
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/* trace/<type>.h here */
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#include <trace/sched.h>
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#include <trace/irq.h>
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#include <trace/lockdep.h>
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#include <trace/skb.h>
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#include <trace/kmem.h>
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@ -41,7 +41,6 @@ obj-$(CONFIG_KMEMTRACE) += kmemtrace.o
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obj-$(CONFIG_WORKQUEUE_TRACER) += trace_workqueue.o
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obj-$(CONFIG_BLK_DEV_IO_TRACE) += blktrace.o
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obj-$(CONFIG_EVENT_TRACING) += trace_events.o
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obj-$(CONFIG_EVENT_TRACER) += events.o
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obj-$(CONFIG_EVENT_TRACING) += trace_export.o
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obj-$(CONFIG_FTRACE_SYSCALLS) += trace_syscalls.o
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obj-$(CONFIG_EVENT_PROFILE) += trace_event_profile.o
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@ -1,15 +0,0 @@
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/*
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* This is the place to register all trace points as events.
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*/
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#include <linux/stringify.h>
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#include <trace/trace_events.h>
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#include "trace_output.h"
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#define TRACE_HEADER_MULTI_READ
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#include "trace_events_stage_1.h"
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#include "trace_events_stage_2.h"
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#include "trace_events_stage_3.h"
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@ -1,39 +0,0 @@
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/*
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* Stage 1 of the trace events.
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*
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* Override the macros in <trace/trace_events.h> to include the following:
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*
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* struct ftrace_raw_<call> {
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* struct trace_entry ent;
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* <type> <item>;
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* <type2> <item2>[<len>];
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* [...]
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* };
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*
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* The <type> <item> is created by the __field(type, item) macro or
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* the __array(type2, item2, len) macro.
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* We simply do "type item;", and that will create the fields
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* in the structure.
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*/
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#undef TRACE_FORMAT
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#define TRACE_FORMAT(call, proto, args, fmt)
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#undef __array
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#define __array(type, item, len) type item[len];
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#undef __field
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#define __field(type, item) type item;
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#undef TP_STRUCT__entry
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#define TP_STRUCT__entry(args...) args
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#undef TRACE_EVENT
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#define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
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struct ftrace_raw_##name { \
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struct trace_entry ent; \
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tstruct \
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}; \
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static struct ftrace_event_call event_##name
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#include <trace/trace_events.h>
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@ -1,170 +0,0 @@
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/*
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* Stage 2 of the trace events.
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*
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* Override the macros in <trace/trace_events.h> to include the following:
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*
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* enum print_line_t
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* ftrace_raw_output_<call>(struct trace_iterator *iter, int flags)
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* {
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* struct trace_seq *s = &iter->seq;
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* struct ftrace_raw_<call> *field; <-- defined in stage 1
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* struct trace_entry *entry;
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* int ret;
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*
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* entry = iter->ent;
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*
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* if (entry->type != event_<call>.id) {
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* WARN_ON_ONCE(1);
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* return TRACE_TYPE_UNHANDLED;
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* }
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*
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* field = (typeof(field))entry;
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*
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* ret = trace_seq_printf(s, <TP_printk> "\n");
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* if (!ret)
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* return TRACE_TYPE_PARTIAL_LINE;
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*
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* return TRACE_TYPE_HANDLED;
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* }
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*
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* This is the method used to print the raw event to the trace
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* output format. Note, this is not needed if the data is read
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* in binary.
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*/
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#undef __entry
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#define __entry field
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#undef TP_printk
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#define TP_printk(fmt, args...) fmt "\n", args
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#undef TRACE_EVENT
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#define TRACE_EVENT(call, proto, args, tstruct, assign, print) \
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enum print_line_t \
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ftrace_raw_output_##call(struct trace_iterator *iter, int flags) \
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{ \
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struct trace_seq *s = &iter->seq; \
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struct ftrace_raw_##call *field; \
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struct trace_entry *entry; \
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int ret; \
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\
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entry = iter->ent; \
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\
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if (entry->type != event_##call.id) { \
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WARN_ON_ONCE(1); \
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return TRACE_TYPE_UNHANDLED; \
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} \
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\
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field = (typeof(field))entry; \
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\
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ret = trace_seq_printf(s, #call ": " print); \
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if (!ret) \
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return TRACE_TYPE_PARTIAL_LINE; \
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\
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return TRACE_TYPE_HANDLED; \
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}
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#include <trace/trace_events.h>
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/*
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* Setup the showing format of trace point.
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*
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* int
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* ftrace_format_##call(struct trace_seq *s)
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* {
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* struct ftrace_raw_##call field;
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* int ret;
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*
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* ret = trace_seq_printf(s, #type " " #item ";"
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* " offset:%u; size:%u;\n",
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* offsetof(struct ftrace_raw_##call, item),
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* sizeof(field.type));
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*
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* }
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*/
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#undef TP_STRUCT__entry
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#define TP_STRUCT__entry(args...) args
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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:%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 __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:%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 __entry
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#define __entry REC
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#undef TP_printk
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#define TP_printk(fmt, args...) "%s, %s\n", #fmt, __stringify(args)
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#undef TP_fast_assign
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#define TP_fast_assign(args...) args
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#undef TRACE_EVENT
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#define TRACE_EVENT(call, proto, args, tstruct, func, print) \
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static int \
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ftrace_format_##call(struct trace_seq *s) \
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{ \
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struct ftrace_raw_##call 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: " print); \
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\
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return ret; \
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}
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#include <trace/trace_events.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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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)); \
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if (ret) \
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return ret;
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#undef TRACE_EVENT
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#define TRACE_EVENT(call, proto, args, tstruct, func, print) \
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int \
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ftrace_define_fields_##call(void) \
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{ \
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struct ftrace_raw_##call field; \
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struct ftrace_event_call *event_call = &event_##call; \
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int ret; \
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\
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__common_field(unsigned char, type); \
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__common_field(unsigned char, flags); \
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__common_field(unsigned char, preempt_count); \
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__common_field(int, pid); \
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__common_field(int, tgid); \
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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/trace_events.h>
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