From 0aaa94a3949c7273f036fc4ec59c7ffa37d7186c Mon Sep 17 00:00:00 2001
From: Neil Leeder <nleeder@codeaurora.org>
Date: Fri, 15 Nov 2013 11:13:02 -0500
Subject: [PATCH] perf: remove JSON scripting format

This is obsolete and no longer used.

Change-Id: I9bf77b692b12cddc25525b7d28140ed2bf69de38
Signed-off-by: Neil Leeder <nleeder@codeaurora.org>
---
 .../Documentation/perf-script-json-export.txt |  29 --
 tools/perf/Makefile                           |   6 -
 tools/perf/builtin-script.c                   |   1 -
 .../trace-event-json-export.c                 | 322 ------------------
 tools/perf/util/trace-event.h                 |   1 -
 5 files changed, 359 deletions(-)
 delete mode 100644 tools/perf/Documentation/perf-script-json-export.txt
 delete mode 100644 tools/perf/util/scripting-engines/trace-event-json-export.c

diff --git a/tools/perf/Documentation/perf-script-json-export.txt b/tools/perf/Documentation/perf-script-json-export.txt
deleted file mode 100644
index dd47c7c1bc5a..000000000000
--- a/tools/perf/Documentation/perf-script-json-export.txt
+++ /dev/null
@@ -1,29 +0,0 @@
-perf-script-json-export(1)
-====================
-
-NAME
-----
-perf-script-json-export - Export trace data to JSON
-
-SYNOPSIS
---------
-[verse]
-'perf script' -g JSON:<script>
-'perf script' -g <script.json>
-'perf script' -s JSON:<script> [option]*
-'perf script' -s <script.json> [option]*
-
-DESCRIPTION
------------
-
-This perf script option is used to export perf script data using JSON
-format.  JSON export extesion is identified either by the 'JSON:'
-prefix or the '.json' file extension.
-
-Both command forms export JSON fomatted data.  The '-g'/'--gen-script'
-option does not include actual event data.  Only Definitions.  '-s'
-version includes events and definition data (by default).
-
-SEE ALSO
---------
-linkperf:perf-script[1]
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 88236a4d4df2..a89d1339f0dd 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -817,12 +817,6 @@ else
   endif
 endif
 
-ifdef NO_JSON_EXPORT
-	BASIC_CFLAGS += -DNO_JSON_EXPORT
-else
-	LIB_OBJS += $(OUTPUT)util/scripting-engines/trace-event-json-export.o
-endif
-
 ifdef NO_DEMANGLE
 	BASIC_CFLAGS += -DNO_DEMANGLE
 else
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 20534a8fcf60..92d4658f56fb 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -461,7 +461,6 @@ static void setup_scripting(void)
 {
 	setup_perl_scripting();
 	setup_python_scripting();
-	setup_json_export();
 
 	scripting_ops = &default_scripting_ops;
 }
diff --git a/tools/perf/util/scripting-engines/trace-event-json-export.c b/tools/perf/util/scripting-engines/trace-event-json-export.c
deleted file mode 100644
index b2cf9c221bcd..000000000000
--- a/tools/perf/util/scripting-engines/trace-event-json-export.c
+++ /dev/null
@@ -1,322 +0,0 @@
-/*
- * trace-event-json-export.  Export events to JSON format.
- *
- * derived from: trace-event-python.c
- *
- * Copyright (c) 2011-2012, The Linux Foundation. All rights reserved.
- * Copyright (C) 2010 Tom Zanussi <tzanussi@gmail.com>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- *
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <ctype.h>
-#include <errno.h>
-
-#include "../../perf.h"
-#include "../util.h"
-#include "../trace-event.h"
-#include "../event.h"
-#include "../thread.h"
-
-#define FTRACE_MAX_EVENT				\
-	((1 << (sizeof(unsigned short) * 8)) - 1)
-
-FILE *ofp;
-struct event *events[FTRACE_MAX_EVENT];
-static char *cur_field_name;
-
-static void define_value(enum print_arg_type field_type,
-			 int id,
-			 const char *field_name,
-			 const char *field_value,
-			 const char *field_str)
-{
-	const char *handler_name = (field_type == PRINT_SYMBOL) ?
-		"define_symbol" : "define_flag";
-	unsigned long long value;
-
-	value = eval_flag(field_value);
-
-	fprintf(ofp,
-		",\n[\"%s\",%d,{\"field\":\"%s\",\"value\":%llu,\"name\":\"%s\"}]",
-		handler_name, id, field_name, value, field_str);
-}
-
-static void define_values(enum print_arg_type field_type,
-			  struct print_flag_sym *field,
-			  int id,
-			  const char *field_name)
-{
-	define_value(field_type, id, field_name, field->value,
-			 field->str);
-
-	if (field->next)
-		define_values(field_type, field->next, id, field_name);
-}
-
-static void define_field(enum print_arg_type field_type,
-			 int id,
-			 const char *field_name,
-			 const char *delim)
-{
-	if (field_type == PRINT_FLAGS) {
-		const char *handler_name = "define_flag_field";
-		fprintf(ofp,
-			",\n[\"%s\",%d,{\"field\":\"%s\",\"delim\":\"%s\"}]",
-			handler_name, id, field_name, delim);
-	} else {
-		const char *handler_name = "define_symbol_field";
-		fprintf(ofp, ",\n[\"%s\",%d,{\"field\":\"%s\"}]",
-				handler_name, id, field_name);
-	}
-}
-
-static void define_event_symbols(struct event *event,
-				struct print_arg *args)
-{
-	switch (args->type) {
-	case PRINT_NULL:
-		break;
-	case PRINT_ATOM:
-		define_value(PRINT_FLAGS, event->id, cur_field_name, "0",
-				 args->atom.atom);
-		break;
-	case PRINT_FIELD:
-		cur_field_name = args->field.name;
-		break;
-	case PRINT_FLAGS:
-		define_event_symbols(event, args->flags.field);
-		define_field(PRINT_FLAGS, event->id, cur_field_name,
-				 args->flags.delim);
-		define_values(PRINT_FLAGS, args->flags.flags, event->id,
-				  cur_field_name);
-		break;
-	case PRINT_SYMBOL:
-		define_event_symbols(event, args->symbol.field);
-		define_field(PRINT_SYMBOL, event->id, cur_field_name, NULL);
-		define_values(PRINT_SYMBOL, args->symbol.symbols, event->id,
-				  cur_field_name);
-		break;
-	case PRINT_STRING:
-		break;
-	case PRINT_TYPE:
-		define_event_symbols(event, args->typecast.item);
-		break;
-	case PRINT_OP:
-		define_event_symbols(event, args->op.left);
-		define_event_symbols(event, args->op.right);
-		break;
-	default:
-		/* we should warn... */
-		return;
-	}
-
-	if (args->next)
-		define_event_symbols(event, args->next);
-}
-
-#define prefix(indx) (indx ? "," : "")
-static void define_event(struct event *event)
-{
-	const char *ev_system = event->system;
-	const char *ev_name = event->name;
-	int indx = 0;
-	const char *handler_name = "define_event";
-	struct format_field *field = 0;
-
-	fprintf(ofp,
-		",\n[\"%s\",%d,{\"system\":\"%s\",\"name\":\"%s\",\"args\":{",
-			handler_name, event->id, ev_system, ev_name);
-
-	fprintf(ofp, "%s\"%s\":%d", prefix(indx), "common_s", indx);
-	indx++;
-	fprintf(ofp, "%s\"%s\":%d", prefix(indx), "common_ns", indx);
-	indx++;
-	fprintf(ofp, "%s\"%s\":%d", prefix(indx), "common_cpu", indx);
-	indx++;
-	fprintf(ofp, "%s\"%s\":%d", prefix(indx), "common_comm", indx);
-	indx++;
-	for (field = event->format.common_fields; field; field = field->next) {
-		fprintf(ofp, "%s\"%s\":%d", prefix(indx), field->name, indx);
-		indx++;
-	}
-	for (field = event->format.fields; field; field = field->next) {
-		fprintf(ofp, "%s\"%s\":%d", prefix(indx), field->name, indx);
-		indx++;
-	}
-	fprintf(ofp, "}}]");
-}
-
-static inline struct event *find_cache_event(int type)
-{
-	struct event *event;
-
-	if (events[type])
-		return events[type];
-
-	events[type] = event = trace_find_event(type);
-	if (!event)
-		return NULL;
-
-	define_event(event);
-	define_event_symbols(event, event->print_fmt.args);
-
-	return event;
-}
-
-static void json_process_field(int indx, void *data, struct format_field *field)
-{
-	unsigned long long val;
-
-	if (field->flags & FIELD_IS_STRING) {
-		int offset;
-		if (field->flags & FIELD_IS_DYNAMIC) {
-			offset = *(int *)(data + field->offset);
-			offset &= 0xffff;
-		} else
-			offset = field->offset;
-		fprintf(ofp, "%s\"%s\"", prefix(indx), (char *)data + offset);
-	} else { /* FIELD_IS_NUMERIC */
-		val = read_size(data + field->offset, field->size);
-		if (field->flags & FIELD_IS_SIGNED)
-			fprintf(ofp, "%s%lld", prefix(indx),
-					(long long int) val);
-		else
-			fprintf(ofp, "%s%llu", prefix(indx), val);
-	}
-}
-
-static void json_process_event(union perf_event *pevent __unused,
-			       struct perf_sample *sample,
-			       struct perf_evsel *evsel __unused,
-			       struct machine *machine __unused,
-			       struct thread *thread)
-{
-	struct format_field *field;
-	unsigned long s, ns;
-	struct event *event;
-	int type;
-	int indx = 0;
-	int cpu = sample->cpu;
-	void *data = sample->raw_data;
-	unsigned long long nsecs = sample->time;
-	char *comm = thread->comm;
-
-	type = trace_parse_common_type(data);
-
-	event = find_cache_event(type);
-	if (!event)
-		die("ug! no event found for type %d", type);
-
-	s = nsecs / NSECS_PER_SEC;
-	ns = nsecs - s * NSECS_PER_SEC;
-
-	fprintf(ofp, ",\n[\"event\",%d,[%lu,%lu,%d,\"%s\"",
-			type, s, ns, cpu, comm);
-
-	indx += 4;
-
-	for (field = event->format.common_fields; field; field = field->next)
-		json_process_field(indx++, data, field);
-
-	for (field = event->format.fields; field; field = field->next)
-		json_process_field(indx++, data, field);
-
-	fprintf(ofp , "]]");
-}
-
-/*
- * Start trace script
- */
-static int json_start_script(const char *script, int argc __unused,
-		const char **argv __unused)
-{
-	int err = 0;
-
-	if (script[0]) {
-		ofp = fopen(script, "w");
-		if (ofp == NULL) {
-			fprintf(stderr, "couldn't open %s\n", script);
-			return -EBADF;
-		}
-	} else
-		ofp = stdout;
-
-	fprintf(ofp, "[[\"trace_start\"]");
-
-	return err;
-}
-
-/*
- * Stop trace script
- */
-static int json_stop_script(void)
-{
-	int err = 0;
-
-	fprintf(ofp, ",\n[\"trace_end\"]]");
-
-	return err;
-}
-
-static int json_generate_script(const char *outfile)
-{
-	struct event *event = NULL;
-	char fname[PATH_MAX];
-
-	snprintf(fname, sizeof(fname), "%s.json", outfile);
-
-	ofp = fopen(fname, "w");
-
-	if (ofp == NULL) {
-		fprintf(stderr, "couldn't open %s\n", fname);
-		return -EBADF;
-	}
-	fprintf(ofp, "[[\"generate_start\"]");
-
-	while ((event = trace_find_next_event(event))) {
-		define_event(event);
-		define_event_symbols(event, event->print_fmt.args);
-	}
-
-	fprintf(ofp, ",\n[\"generate_end\"]]");
-
-	fclose(ofp);
-
-	fprintf(stderr, "generated json script: %s\n", fname);
-
-	return 0;
-}
-
-struct scripting_ops json_scripting_ops = {
-	.name = "JSON",
-	.start_script = json_start_script,
-	.stop_script = json_stop_script,
-	.process_event = json_process_event,
-	.generate_script = json_generate_script,
-};
-
-void setup_json_export(void)
-{
-	int err;
-	err = script_spec_register("JSON", &json_scripting_ops);
-	if (err)
-		die("error registering JSON export extension");
-}
-
diff --git a/tools/perf/util/trace-event.h b/tools/perf/util/trace-event.h
index 571daa7c9248..1978c398ad87 100644
--- a/tools/perf/util/trace-event.h
+++ b/tools/perf/util/trace-event.h
@@ -91,7 +91,6 @@ int script_spec_register(const char *spec, struct scripting_ops *ops);
 
 void setup_perl_scripting(void);
 void setup_python_scripting(void);
-void setup_json_export(void);
 
 struct scripting_context {
 	struct pevent *pevent;