1 // SPDX-License-Identifier: GPL-2.0-only
8 #include "data-convert.h"
32 	FILE *out;  member
37 // Outputs a JSON-encoded string surrounded by quotes with characters escaped.
38 static void output_json_string(FILE *out, const char *s)  in output_json_string()  argument
40 	fputc('"', out);  in output_json_string()
45 		case '"':  fputs("\\\"", out); break;  in output_json_string()
46 		case '\\': fputs("\\\\", out); break;  in output_json_string()
47 		case '\b': fputs("\\b", out);  break;  in output_json_string()
48 		case '\f': fputs("\\f", out);  break;  in output_json_string()
49 		case '\n': fputs("\\n", out);  break;  in output_json_string()
50 		case '\r': fputs("\\r", out);  break;  in output_json_string()
51 		case '\t': fputs("\\t", out);  break;  in output_json_string()
56 				fprintf(out, "\\u%04x", *s);  in output_json_string()
58 				fputc(*s, out);  in output_json_string()
64 	fputc('"', out);  in output_json_string()
69 static void output_json_delimiters(FILE *out, bool comma, int depth)  in output_json_delimiters()  argument
74 		fputc(',', out);  in output_json_delimiters()
75 	fputc('\n', out);  in output_json_delimiters()
77 		fputc('\t', out);  in output_json_delimiters()
82 static void output_json_format(FILE *out, bool comma, int depth, const char *format, ...)  in output_json_format()  argument
86 	output_json_delimiters(out, comma, depth);  in output_json_format()
88 	vfprintf(out,  format, args);  in output_json_format()
92 // Outputs a JSON key-value pair where the value is a string.
93 static void output_json_key_string(FILE *out, bool comma, int depth,  in output_json_key_string()  argument
96 	output_json_delimiters(out, comma, depth);  in output_json_key_string()
97 	output_json_string(out, key);  in output_json_key_string()
98 	fputs(": ", out);  in output_json_key_string()
99 	output_json_string(out, value);  in output_json_key_string()
102 // Outputs a JSON key-value pair where the value is a printf format string.
104 static void output_json_key_format(FILE *out, bool comma, int depth,  in output_json_key_format()  argument
109 	output_json_delimiters(out, comma, depth);  in output_json_key_format()
110 	output_json_string(out, key);  in output_json_key_format()
111 	fputs(": ", out);  in output_json_key_format()
113 	vfprintf(out,  format, args);  in output_json_key_format()
121 	FILE *out = c->out;  in output_sample_callchain_entry()  local
123 	output_json_format(out, false, 4, "{");  in output_sample_callchain_entry()
124 	output_json_key_format(out, false, 5, "ip", "\"0x%" PRIx64 "\"", ip);  in output_sample_callchain_entry()
126 	if (al && al->sym && al->sym->namelen) {  in output_sample_callchain_entry()
127 		fputc(',', out);  in output_sample_callchain_entry()
128 		output_json_key_string(out, false, 5, "symbol", al->sym->name);  in output_sample_callchain_entry()
130 		if (al->map && al->map->dso) {  in output_sample_callchain_entry()
131 			const char *dso = al->map->dso->short_name;  in output_sample_callchain_entry()
134 				fputc(',', out);  in output_sample_callchain_entry()
135 				output_json_key_string(out, false, 5, "dso", dso);  in output_sample_callchain_entry()
140 	output_json_format(out, false, 4, "}");  in output_sample_callchain_entry()
150 	FILE *out = c->out;  in process_sample_event()  local
152 	u64 sample_type = __evlist__combined_sample_type(evsel->evlist);  in process_sample_event()
157 		return -1;  in process_sample_event()
160 	++c->events_count;  in process_sample_event()
162 	if (c->first)  in process_sample_event()
163 		c->first = false;  in process_sample_event()
165 		fputc(',', out);  in process_sample_event()
166 	output_json_format(out, false, 2, "{");  in process_sample_event()
168 	output_json_key_format(out, false, 3, "timestamp", "%" PRIi64, sample->time);  in process_sample_event()
169 	output_json_key_format(out, true, 3, "pid", "%i", al.thread->pid_);  in process_sample_event()
170 	output_json_key_format(out, true, 3, "tid", "%i", al.thread->tid);  in process_sample_event()
173 		output_json_key_format(out, true, 3, "cpu", "%i", sample->cpu);  in process_sample_event()
174 	else if (al.thread->cpu >= 0)  in process_sample_event()
175 		output_json_key_format(out, true, 3, "cpu", "%i", al.thread->cpu);  in process_sample_event()
177 	output_json_key_string(out, true, 3, "comm", thread__comm_str(al.thread));  in process_sample_event()
179 	output_json_key_format(out, true, 3, "callchain", "[");  in process_sample_event()
180 	if (sample->callchain) {  in process_sample_event()
185 		for (i = 0; i < sample->callchain->nr; ++i) {  in process_sample_event()
186 			u64 ip = sample->callchain->ips[i];  in process_sample_event()
210 				fputc(',', out);  in process_sample_event()
216 		output_sample_callchain_entry(tool, sample->ip, &al);  in process_sample_event()
218 	output_json_format(out, false, 3, "]");  in process_sample_event()
220 	output_json_format(out, false, 2, "}");  in process_sample_event()
227 	struct perf_header *header = &session->header;  in output_headers()
229 	int fd = perf_data__fd(session->data);  in output_headers()
231 	FILE *out = c->out;  in output_headers()  local
233 	output_json_key_format(out, false, 2, "header-version", "%u", header->version);  in output_headers()
241 		output_json_key_string(out, true, 2, "captured-on", buf);  in output_headers()
243 		pr_debug("Failed to get mtime of source file, not writing captured-on");  in output_headers()
246 	output_json_key_format(out, true, 2, "data-offset", "%" PRIu64, header->data_offset);  in output_headers()
247 	output_json_key_format(out, true, 2, "data-size", "%" PRIu64, header->data_size);  in output_headers()
248 	output_json_key_format(out, true, 2, "feat-offset", "%" PRIu64, header->feat_offset);  in output_headers()
250 	output_json_key_string(out, true, 2, "hostname", header->env.hostname);  in output_headers()
251 	output_json_key_string(out, true, 2, "os-release", header->env.os_release);  in output_headers()
252 	output_json_key_string(out, true, 2, "arch", header->env.arch);  in output_headers()
254 	output_json_key_string(out, true, 2, "cpu-desc", header->env.cpu_desc);  in output_headers()
255 	output_json_key_string(out, true, 2, "cpuid", header->env.cpuid);  in output_headers()
256 	output_json_key_format(out, true, 2, "nrcpus-online", "%u", header->env.nr_cpus_online);  in output_headers()
257 	output_json_key_format(out, true, 2, "nrcpus-avail", "%u", header->env.nr_cpus_avail);  in output_headers()
259 	if (header->env.clock.enabled) {  in output_headers()
260 		output_json_key_format(out, true, 2, "clockid",  in output_headers()
261 				"%u", header->env.clock.clockid);  in output_headers()
262 		output_json_key_format(out, true, 2, "clock-time",  in output_headers()
263 				"%" PRIu64, header->env.clock.clockid_ns);  in output_headers()
264 		output_json_key_format(out, true, 2, "real-time",  in output_headers()
265 				"%" PRIu64, header->env.clock.tod_ns);  in output_headers()
268 	output_json_key_string(out, true, 2, "perf-version", header->env.version);  in output_headers()
270 	output_json_key_format(out, true, 2, "cmdline", "[");  in output_headers()
271 	for (i = 0; i < header->env.nr_cmdline; i++) {  in output_headers()
272 		output_json_delimiters(out, i != 0, 3);  in output_headers()
273 		output_json_string(c->out, header->env.cmdline_argv[i]);  in output_headers()
275 	output_json_format(out, false, 2, "]");  in output_headers()
283 	int ret = -1;  in bt_convert__perf2json()
309 	struct perf_data data = {  in bt_convert__perf2json()  local
312 		.force = opts->force,  in bt_convert__perf2json()
315 	if (opts->all) {  in bt_convert__perf2json()
316 		pr_err("--all is currently unsupported for JSON output.\n");  in bt_convert__perf2json()
319 	if (opts->tod) {  in bt_convert__perf2json()
320 		pr_err("--tod is currently unsupported for JSON output.\n");  in bt_convert__perf2json()
324 	fd = open(output_name, O_CREAT | O_WRONLY | (opts->force ? O_TRUNC : O_EXCL), 0666);  in bt_convert__perf2json()
325 	if (fd == -1) {  in bt_convert__perf2json()
327 			pr_err("Output file exists. Use --force to overwrite it.\n");  in bt_convert__perf2json()
333 	c.out = fdopen(fd, "w");  in bt_convert__perf2json()
334 	if (!c.out) {  in bt_convert__perf2json()
340 	session = perf_session__new(&data, &c.tool);  in bt_convert__perf2json()
346 	if (symbol__init(&session->header.env) < 0) {  in bt_convert__perf2json()
353 	fputc('{', c.out);  in bt_convert__perf2json()
355 	// Version number for future-proofing. Most additions should be able to be  in bt_convert__perf2json()
356 	// done in a backwards-compatible way so this should only need to be bumped  in bt_convert__perf2json()
358 	output_json_format(c.out, false, 1, "\"linux-perf-json-version\": 1");  in bt_convert__perf2json()
361 	output_json_format(c.out, true, 1, "\"headers\": {");  in bt_convert__perf2json()
363 	output_json_format(c.out, false, 1, "}");  in bt_convert__perf2json()
366 	output_json_format(c.out, true, 1, "\"samples\": [");  in bt_convert__perf2json()
368 	output_json_format(c.out, false, 1, "]");  in bt_convert__perf2json()
369 	output_json_format(c.out, false, 0, "}");  in bt_convert__perf2json()
370 	fputc('\n', c.out);  in bt_convert__perf2json()
373 			"[ perf data convert: Converted '%s' into JSON data '%s' ]\n",  in bt_convert__perf2json()
374 			data.path, output_name);  in bt_convert__perf2json()
377 			"[ perf data convert: Converted and wrote %.3f MB (%" PRIu64 " samples) ]\n",  in bt_convert__perf2json()
378 			(ftell(c.out)) / 1024.0 / 1024.0, c.events_count);  in bt_convert__perf2json()
384 	fclose(c.out);  in bt_convert__perf2json()