[mirror_ubuntu-artful-kernel.git] / tools / perf / util / scripting-engines / trace-event-perl.c

/*
 * trace-event-perl.  Feed perf script events to an embedded Perl interpreter.
 *
 * Copyright (C) 2009 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 <EXTERN.h>
#include <perl.h>

void boot_Perf__Trace__Context(pTHX_ CV *cv);
void boot_DynaLoader(pTHX_ CV *cv);
typedef PerlInterpreter * INTERP;

void xs_init(pTHX);

void xs_init(pTHX)
{
	const char *file = __FILE__;
	dXSUB_SYS;

	newXS("Perf::Trace::Context::bootstrap", boot_Perf__Trace__Context,
	      file);
	newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader, file);
}

INTERP my_perl;

#define FTRACE_MAX_EVENT				\
	((1 << (sizeof(unsigned short) * 8)) - 1)

struct event *events[FTRACE_MAX_EVENT];

extern struct scripting_context *scripting_context;

static char *cur_field_name;
static int zero_flag_atom;

static void define_symbolic_value(const char *ev_name,
				  const char *field_name,
				  const char *field_value,
				  const char *field_str)
{
	unsigned long long value;
	dSP;

	value = eval_flag(field_value);

	ENTER;
	SAVETMPS;
	PUSHMARK(SP);

	XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
	XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
	XPUSHs(sv_2mortal(newSVuv(value)));
	XPUSHs(sv_2mortal(newSVpv(field_str, 0)));

	PUTBACK;
	if (get_cv("main::define_symbolic_value", 0))
		call_pv("main::define_symbolic_value", G_SCALAR);
	SPAGAIN;
	PUTBACK;
	FREETMPS;
	LEAVE;
}

static void define_symbolic_values(struct print_flag_sym *field,
				   const char *ev_name,
				   const char *field_name)
{
	define_symbolic_value(ev_name, field_name, field->value, field->str);
	if (field->next)
		define_symbolic_values(field->next, ev_name, field_name);
}

static void define_symbolic_field(const char *ev_name,
				  const char *field_name)
{
	dSP;

	ENTER;
	SAVETMPS;
	PUSHMARK(SP);

	XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
	XPUSHs(sv_2mortal(newSVpv(field_name, 0)));

	PUTBACK;
	if (get_cv("main::define_symbolic_field", 0))
		call_pv("main::define_symbolic_field", G_SCALAR);
	SPAGAIN;
	PUTBACK;
	FREETMPS;
	LEAVE;
}

static void define_flag_value(const char *ev_name,
			      const char *field_name,
			      const char *field_value,
			      const char *field_str)
{
	unsigned long long value;
	dSP;

	value = eval_flag(field_value);

	ENTER;
	SAVETMPS;
	PUSHMARK(SP);

	XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
	XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
	XPUSHs(sv_2mortal(newSVuv(value)));
	XPUSHs(sv_2mortal(newSVpv(field_str, 0)));

	PUTBACK;
	if (get_cv("main::define_flag_value", 0))
		call_pv("main::define_flag_value", G_SCALAR);
	SPAGAIN;
	PUTBACK;
	FREETMPS;
	LEAVE;
}

static void define_flag_values(struct print_flag_sym *field,
			       const char *ev_name,
			       const char *field_name)
{
	define_flag_value(ev_name, field_name, field->value, field->str);
	if (field->next)
		define_flag_values(field->next, ev_name, field_name);
}

static void define_flag_field(const char *ev_name,
			      const char *field_name,
			      const char *delim)
{
	dSP;

	ENTER;
	SAVETMPS;
	PUSHMARK(SP);

	XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
	XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
	XPUSHs(sv_2mortal(newSVpv(delim, 0)));

	PUTBACK;
	if (get_cv("main::define_flag_field", 0))
		call_pv("main::define_flag_field", G_SCALAR);
	SPAGAIN;
	PUTBACK;
	FREETMPS;
	LEAVE;
}

static void define_event_symbols(struct event *event,
				 const char *ev_name,
				 struct print_arg *args)
{
	switch (args->type) {
	case PRINT_NULL:
		break;
	case PRINT_ATOM:
		define_flag_value(ev_name, cur_field_name, "0",
				  args->atom.atom);
		zero_flag_atom = 0;
		break;
	case PRINT_FIELD:
		if (cur_field_name)
			free(cur_field_name);
		cur_field_name = strdup(args->field.name);
		break;
	case PRINT_FLAGS:
		define_event_symbols(event, ev_name, args->flags.field);
		define_flag_field(ev_name, cur_field_name, args->flags.delim);
		define_flag_values(args->flags.flags, ev_name, cur_field_name);
		break;
	case PRINT_SYMBOL:
		define_event_symbols(event, ev_name, args->symbol.field);
		define_symbolic_field(ev_name, cur_field_name);
		define_symbolic_values(args->symbol.symbols, ev_name,
				       cur_field_name);
		break;
	case PRINT_STRING:
		break;
	case PRINT_TYPE:
		define_event_symbols(event, ev_name, args->typecast.item);
		break;
	case PRINT_OP:
		if (strcmp(args->op.op, ":") == 0)
			zero_flag_atom = 1;
		define_event_symbols(event, ev_name, args->op.left);
		define_event_symbols(event, ev_name, args->op.right);
		break;
	default:
		/* we should warn... */
		return;
	}

	if (args->next)
		define_event_symbols(event, ev_name, args->next);
}

static inline struct event *find_cache_event(int type)
{
	static char ev_name[256];
	struct event *event;

	if (events[type])
		return events[type];

	events[type] = event = trace_find_event(type);
	if (!event)
		return NULL;

	sprintf(ev_name, "%s::%s", event->system, event->name);

	define_event_symbols(event, ev_name, event->print_fmt.args);

	return event;
}

static void perl_process_event(union perf_event *pevent __unused,
			       struct perf_sample *sample,
			       struct perf_evsel *evsel,
			       struct perf_session *session __unused,
			       struct thread *thread)
{
	struct format_field *field;
	static char handler[256];
	unsigned long long val;
	unsigned long s, ns;
	struct event *event;
	int type;
	int pid;
	int cpu = sample->cpu;
	void *data = sample->raw_data;
	unsigned long long nsecs = sample->time;
	char *comm = thread->comm;

	dSP;

	type = trace_parse_common_type(data);

	event = find_cache_event(type);
	if (!event)
		die("ug! no event found for type %d", type);

	pid = trace_parse_common_pid(data);

	sprintf(handler, "%s::%s", event->system, event->name);

	s = nsecs / NSECS_PER_SEC;
	ns = nsecs - s * NSECS_PER_SEC;

	scripting_context->event_data = data;

	ENTER;
	SAVETMPS;
	PUSHMARK(SP);

	XPUSHs(sv_2mortal(newSVpv(handler, 0)));
	XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context))));
	XPUSHs(sv_2mortal(newSVuv(cpu)));
	XPUSHs(sv_2mortal(newSVuv(s)));
	XPUSHs(sv_2mortal(newSVuv(ns)));
	XPUSHs(sv_2mortal(newSViv(pid)));
	XPUSHs(sv_2mortal(newSVpv(comm, 0)));

	/* common fields other than pid can be accessed via xsub fns */

	for (field = event->format.fields; field; field = field->next) {
		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;
			XPUSHs(sv_2mortal(newSVpv((char *)data + offset, 0)));
		} else { /* FIELD_IS_NUMERIC */
			val = read_size(data + field->offset, field->size);
			if (field->flags & FIELD_IS_SIGNED) {
				XPUSHs(sv_2mortal(newSViv(val)));
			} else {
				XPUSHs(sv_2mortal(newSVuv(val)));
			}
		}
	}

	PUTBACK;

	if (get_cv(handler, 0))
		call_pv(handler, G_SCALAR);
	else if (get_cv("main::trace_unhandled", 0)) {
		XPUSHs(sv_2mortal(newSVpv(handler, 0)));
		XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context))));
		XPUSHs(sv_2mortal(newSVuv(cpu)));
		XPUSHs(sv_2mortal(newSVuv(nsecs)));
		XPUSHs(sv_2mortal(newSViv(pid)));
		XPUSHs(sv_2mortal(newSVpv(comm, 0)));
		call_pv("main::trace_unhandled", G_SCALAR);
	}
	SPAGAIN;
	PUTBACK;
	FREETMPS;
	LEAVE;
}

static void run_start_sub(void)
{
	dSP; /* access to Perl stack */
	PUSHMARK(SP);

	if (get_cv("main::trace_begin", 0))
		call_pv("main::trace_begin", G_DISCARD | G_NOARGS);
}

/*
 * Start trace script
 */
static int perl_start_script(const char *script, int argc, const char **argv)
{
	const char **command_line;
	int i, err = 0;

	command_line = malloc((argc + 2) * sizeof(const char *));
	command_line[0] = "";
	command_line[1] = script;
	for (i = 2; i < argc + 2; i++)
		command_line[i] = argv[i - 2];

	my_perl = perl_alloc();
	perl_construct(my_perl);

	if (perl_parse(my_perl, xs_init, argc + 2, (char **)command_line,
		       (char **)NULL)) {
		err = -1;
		goto error;
	}

	if (perl_run(my_perl)) {
		err = -1;
		goto error;
	}

	if (SvTRUE(ERRSV)) {
		err = -1;
		goto error;
	}

	run_start_sub();

	free(command_line);
	return 0;
error:
	perl_free(my_perl);
	free(command_line);

	return err;
}

/*
 * Stop trace script
 */
static int perl_stop_script(void)
{
	dSP; /* access to Perl stack */
	PUSHMARK(SP);

	if (get_cv("main::trace_end", 0))
		call_pv("main::trace_end", G_DISCARD | G_NOARGS);

	perl_destruct(my_perl);
	perl_free(my_perl);

	return 0;
}

static int perl_generate_script(const char *outfile)
{
	struct event *event = NULL;
	struct format_field *f;
	char fname[PATH_MAX];
	int not_first, count;
	FILE *ofp;

	sprintf(fname, "%s.pl", outfile);
	ofp = fopen(fname, "w");
	if (ofp == NULL) {
		fprintf(stderr, "couldn't open %s\n", fname);
		return -1;
	}

	fprintf(ofp, "# perf script event handlers, "
		"generated by perf script -g perl\n");

	fprintf(ofp, "# Licensed under the terms of the GNU GPL"
		" License version 2\n\n");

	fprintf(ofp, "# The common_* event handler fields are the most useful "
		"fields common to\n");

	fprintf(ofp, "# all events.  They don't necessarily correspond to "
		"the 'common_*' fields\n");

	fprintf(ofp, "# in the format files.  Those fields not available as "
		"handler params can\n");

	fprintf(ofp, "# be retrieved using Perl functions of the form "
		"common_*($context).\n");

	fprintf(ofp, "# See Context.pm for the list of available "
		"functions.\n\n");

	fprintf(ofp, "use lib \"$ENV{'PERF_EXEC_PATH'}/scripts/perl/"
		"Perf-Trace-Util/lib\";\n");

	fprintf(ofp, "use lib \"./Perf-Trace-Util/lib\";\n");
	fprintf(ofp, "use Perf::Trace::Core;\n");
	fprintf(ofp, "use Perf::Trace::Context;\n");
	fprintf(ofp, "use Perf::Trace::Util;\n\n");

	fprintf(ofp, "sub trace_begin\n{\n\t# optional\n}\n\n");
	fprintf(ofp, "sub trace_end\n{\n\t# optional\n}\n\n");

	while ((event = trace_find_next_event(event))) {
		fprintf(ofp, "sub %s::%s\n{\n", event->system, event->name);
		fprintf(ofp, "\tmy (");

		fprintf(ofp, "$event_name, ");
		fprintf(ofp, "$context, ");
		fprintf(ofp, "$common_cpu, ");
		fprintf(ofp, "$common_secs, ");
		fprintf(ofp, "$common_nsecs,\n");
		fprintf(ofp, "\t    $common_pid, ");
		fprintf(ofp, "$common_comm,\n\t    ");

		not_first = 0;
		count = 0;

		for (f = event->format.fields; f; f = f->next) {
			if (not_first++)
				fprintf(ofp, ", ");
			if (++count % 5 == 0)
				fprintf(ofp, "\n\t    ");

			fprintf(ofp, "$%s", f->name);
		}
		fprintf(ofp, ") = @_;\n\n");

		fprintf(ofp, "\tprint_header($event_name, $common_cpu, "
			"$common_secs, $common_nsecs,\n\t             "
			"$common_pid, $common_comm);\n\n");

		fprintf(ofp, "\tprintf(\"");

		not_first = 0;
		count = 0;

		for (f = event->format.fields; f; f = f->next) {
			if (not_first++)
				fprintf(ofp, ", ");
			if (count && count % 4 == 0) {
				fprintf(ofp, "\".\n\t       \"");
			}
			count++;

			fprintf(ofp, "%s=", f->name);
			if (f->flags & FIELD_IS_STRING ||
			    f->flags & FIELD_IS_FLAG ||
			    f->flags & FIELD_IS_SYMBOLIC)
				fprintf(ofp, "%%s");
			else if (f->flags & FIELD_IS_SIGNED)
				fprintf(ofp, "%%d");
			else
				fprintf(ofp, "%%u");
		}

		fprintf(ofp, "\\n\",\n\t       ");

		not_first = 0;
		count = 0;

		for (f = event->format.fields; f; f = f->next) {
			if (not_first++)
				fprintf(ofp, ", ");

			if (++count % 5 == 0)
				fprintf(ofp, "\n\t       ");

			if (f->flags & FIELD_IS_FLAG) {
				if ((count - 1) % 5 != 0) {
					fprintf(ofp, "\n\t       ");
					count = 4;
				}
				fprintf(ofp, "flag_str(\"");
				fprintf(ofp, "%s::%s\", ", event->system,
					event->name);
				fprintf(ofp, "\"%s\", $%s)", f->name,
					f->name);
			} else if (f->flags & FIELD_IS_SYMBOLIC) {
				if ((count - 1) % 5 != 0) {
					fprintf(ofp, "\n\t       ");
					count = 4;
				}
				fprintf(ofp, "symbol_str(\"");
				fprintf(ofp, "%s::%s\", ", event->system,
					event->name);
				fprintf(ofp, "\"%s\", $%s)", f->name,
					f->name);
			} else
				fprintf(ofp, "$%s", f->name);
		}

		fprintf(ofp, ");\n");
		fprintf(ofp, "}\n\n");
	}

	fprintf(ofp, "sub trace_unhandled\n{\n\tmy ($event_name, $context, "
		"$common_cpu, $common_secs, $common_nsecs,\n\t    "
		"$common_pid, $common_comm) = @_;\n\n");

	fprintf(ofp, "\tprint_header($event_name, $common_cpu, "
		"$common_secs, $common_nsecs,\n\t             $common_pid, "
		"$common_comm);\n}\n\n");

	fprintf(ofp, "sub print_header\n{\n"
		"\tmy ($event_name, $cpu, $secs, $nsecs, $pid, $comm) = @_;\n\n"
		"\tprintf(\"%%-20s %%5u %%05u.%%09u %%8u %%-20s \",\n\t       "
		"$event_name, $cpu, $secs, $nsecs, $pid, $comm);\n}");

	fclose(ofp);

	fprintf(stderr, "generated Perl script: %s\n", fname);

	return 0;
}

struct scripting_ops perl_scripting_ops = {
	.name = "Perl",
	.start_script = perl_start_script,
	.stop_script = perl_stop_script,
	.process_event = perl_process_event,
	.generate_script = perl_generate_script,
};
Commit	Line	Data
16c632de	1	/*
133dc4c3	2	* trace-event-perl. Feed perf script events to an embedded Perl interpreter.
16c632de TZ	3	*
	4	* Copyright (C) 2009 Tom Zanussi <tzanussi@gmail.com>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	19	*
	20	*/
	21
	22	#include <stdio.h>
	23	#include <stdlib.h>
	24	#include <string.h>
	25	#include <ctype.h>
	26	#include <errno.h>
	27
82d156cd TZ	28	#include "../../perf.h"
	29	#include "../util.h"
	30	#include "../trace-event.h"
	31
	32	#include <EXTERN.h>
	33	#include <perl.h>
	34
	35	void boot_Perf__Trace__Context(pTHX_ CV *cv);
	36	void boot_DynaLoader(pTHX_ CV *cv);
	37	typedef PerlInterpreter * INTERP;
16c632de	38
d1b93772 TZ	39	void xs_init(pTHX);
d1b93772 TZ	40
d1b93772 TZ	41	void xs_init(pTHX)
	42	{
	43	const char *file = __FILE__;
	44	dXSUB_SYS;
	45
	46	newXS("Perf::Trace::Context::bootstrap", boot_Perf__Trace__Context,
	47	file);
	48	newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader, file);
	49	}
	50
16c632de TZ	51	INTERP my_perl;
	52
	53	#define FTRACE_MAX_EVENT \
	54	((1 << (sizeof(unsigned short) * 8)) - 1)
	55
	56	struct event *events[FTRACE_MAX_EVENT];
	57
82d156cd	58	extern struct scripting_context *scripting_context;
16c632de TZ	59
	60	static char *cur_field_name;
	61	static int zero_flag_atom;
	62
	63	static void define_symbolic_value(const char *ev_name,
	64	const char *field_name,
	65	const char *field_value,
	66	const char *field_str)
	67	{
	68	unsigned long long value;
	69	dSP;
	70
	71	value = eval_flag(field_value);
	72
	73	ENTER;
	74	SAVETMPS;
	75	PUSHMARK(SP);
	76
	77	XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
	78	XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
	79	XPUSHs(sv_2mortal(newSVuv(value)));
	80	XPUSHs(sv_2mortal(newSVpv(field_str, 0)));
	81
	82	PUTBACK;
	83	if (get_cv("main::define_symbolic_value", 0))
	84	call_pv("main::define_symbolic_value", G_SCALAR);
	85	SPAGAIN;
	86	PUTBACK;
	87	FREETMPS;
	88	LEAVE;
	89	}
	90
	91	static void define_symbolic_values(struct print_flag_sym *field,
	92	const char *ev_name,
	93	const char *field_name)
	94	{
	95	define_symbolic_value(ev_name, field_name, field->value, field->str);
	96	if (field->next)
	97	define_symbolic_values(field->next, ev_name, field_name);
	98	}
	99
	100	static void define_symbolic_field(const char *ev_name,
	101	const char *field_name)
	102	{
	103	dSP;
	104
	105	ENTER;
	106	SAVETMPS;
	107	PUSHMARK(SP);
	108
	109	XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
	110	XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
	111
	112	PUTBACK;
	113	if (get_cv("main::define_symbolic_field", 0))
	114	call_pv("main::define_symbolic_field", G_SCALAR);
	115	SPAGAIN;
	116	PUTBACK;
	117	FREETMPS;
	118	LEAVE;
	119	}
	120
	121	static void define_flag_value(const char *ev_name,
	122	const char *field_name,
123	const char *field_value,
124	const char *field_str)
125	{
126	unsigned long long value;
127	dSP;
128
129	value = eval_flag(field_value);
130
131	ENTER;
132	SAVETMPS;
133	PUSHMARK(SP);
134
135	XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
136	XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
137	XPUSHs(sv_2mortal(newSVuv(value)));
138	XPUSHs(sv_2mortal(newSVpv(field_str, 0)));
139
140	PUTBACK;
141	if (get_cv("main::define_flag_value", 0))
142	call_pv("main::define_flag_value", G_SCALAR);
143	SPAGAIN;
144	PUTBACK;
145	FREETMPS;
146	LEAVE;
147	}
148
149	static void define_flag_values(struct print_flag_sym *field,
150	const char *ev_name,
151	const char *field_name)
152	{
153	define_flag_value(ev_name, field_name, field->value, field->str);
154	if (field->next)
155	define_flag_values(field->next, ev_name, field_name);
156	}
157
158	static void define_flag_field(const char *ev_name,
159	const char *field_name,
160	const char *delim)
161	{
162	dSP;
163
164	ENTER;
165	SAVETMPS;
166	PUSHMARK(SP);
167
168	XPUSHs(sv_2mortal(newSVpv(ev_name, 0)));
169	XPUSHs(sv_2mortal(newSVpv(field_name, 0)));
170	XPUSHs(sv_2mortal(newSVpv(delim, 0)));
171
172	PUTBACK;
173	if (get_cv("main::define_flag_field", 0))
174	call_pv("main::define_flag_field", G_SCALAR);
175	SPAGAIN;
176	PUTBACK;
177	FREETMPS;
178	LEAVE;
179	}
180
181	static void define_event_symbols(struct event *event,
182	const char *ev_name,
183	struct print_arg *args)
184	{
185	switch (args->type) {
186	case PRINT_NULL:
187	break;
188	case PRINT_ATOM:
189	define_flag_value(ev_name, cur_field_name, "0",
190	args->atom.atom);
191	zero_flag_atom = 0;
192	break;
193	case PRINT_FIELD:
194	if (cur_field_name)
195	free(cur_field_name);
196	cur_field_name = strdup(args->field.name);
197	break;
198	case PRINT_FLAGS:
199	define_event_symbols(event, ev_name, args->flags.field);
200	define_flag_field(ev_name, cur_field_name, args->flags.delim);
201	define_flag_values(args->flags.flags, ev_name, cur_field_name);
202	break;
203	case PRINT_SYMBOL:
204	define_event_symbols(event, ev_name, args->symbol.field);
205	define_symbolic_field(ev_name, cur_field_name);
206	define_symbolic_values(args->symbol.symbols, ev_name,
207	cur_field_name);
208	break;
209	case PRINT_STRING:
210	break;
211	case PRINT_TYPE:
212	define_event_symbols(event, ev_name, args->typecast.item);
213	break;
214	case PRINT_OP:
215	if (strcmp(args->op.op, ":") == 0)
216	zero_flag_atom = 1;
217	define_event_symbols(event, ev_name, args->op.left);
218	define_event_symbols(event, ev_name, args->op.right);
219	break;
220	default:
221	/* we should warn... */
222	return;
223	}
224
225	if (args->next)
226	define_event_symbols(event, ev_name, args->next);
227	}
228
229	static inline struct event *find_cache_event(int type)
230	{
231	static char ev_name[256];
232	struct event *event;
233
234	if (events[type])
235	return events[type];
236
237	events[type] = event = trace_find_event(type);
238	if (!event)
239	return NULL;
240
241	sprintf(ev_name, "%s::%s", event->system, event->name);
242
243	define_event_symbols(event, ev_name, event->print_fmt.args);
244
245	return event;
246	}
247
be6d842a DA	248	static void perl_process_event(union perf_event *pevent __unused,
be6d842a DA	249	struct perf_sample *sample,
9e69c210	250	struct perf_evsel *evsel,
be6d842a DA	251	struct perf_session *session __unused,
be6d842a DA	252	struct thread *thread)
16c632de TZ	253	{
	254	struct format_field *field;
	255	static char handler[256];
	256	unsigned long long val;
	257	unsigned long s, ns;
	258	struct event *event;
	259	int type;
	260	int pid;
be6d842a DA	261	int cpu = sample->cpu;
	262	void *data = sample->raw_data;
	263	unsigned long long nsecs = sample->time;
	264	char *comm = thread->comm;
16c632de TZ	265
	266	dSP;
	267
	268	type = trace_parse_common_type(data);
	269
	270	event = find_cache_event(type);
	271	if (!event)
	272	die("ug! no event found for type %d", type);
	273
	274	pid = trace_parse_common_pid(data);
	275
	276	sprintf(handler, "%s::%s", event->system, event->name);
	277
	278	s = nsecs / NSECS_PER_SEC;
	279	ns = nsecs - s * NSECS_PER_SEC;
	280
	281	scripting_context->event_data = data;
	282
	283	ENTER;
	284	SAVETMPS;
	285	PUSHMARK(SP);
	286
	287	XPUSHs(sv_2mortal(newSVpv(handler, 0)));
	288	XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context))));
	289	XPUSHs(sv_2mortal(newSVuv(cpu)));
	290	XPUSHs(sv_2mortal(newSVuv(s)));
	291	XPUSHs(sv_2mortal(newSVuv(ns)));
	292	XPUSHs(sv_2mortal(newSViv(pid)));
	293	XPUSHs(sv_2mortal(newSVpv(comm, 0)));
	294
	295	/* common fields other than pid can be accessed via xsub fns */
	296
	297	for (field = event->format.fields; field; field = field->next) {
	298	if (field->flags & FIELD_IS_STRING) {
	299	int offset;
	300	if (field->flags & FIELD_IS_DYNAMIC) {
	301	offset = (int )(data + field->offset);
	302	offset &= 0xffff;
	303	} else
	304	offset = field->offset;
	305	XPUSHs(sv_2mortal(newSVpv((char *)data + offset, 0)));
	306	} else { /* FIELD_IS_NUMERIC */
	307	val = read_size(data + field->offset, field->size);
	308	if (field->flags & FIELD_IS_SIGNED) {
	309	XPUSHs(sv_2mortal(newSViv(val)));
	310	} else {
	311	XPUSHs(sv_2mortal(newSVuv(val)));
	312	}
	313	}
	314	}
	315
	316	PUTBACK;
d1b93772	317
16c632de TZ	318	if (get_cv(handler, 0))
	319	call_pv(handler, G_SCALAR);
	320	else if (get_cv("main::trace_unhandled", 0)) {
	321	XPUSHs(sv_2mortal(newSVpv(handler, 0)));
	322	XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context))));
	323	XPUSHs(sv_2mortal(newSVuv(cpu)));
	324	XPUSHs(sv_2mortal(newSVuv(nsecs)));
	325	XPUSHs(sv_2mortal(newSViv(pid)));
	326	XPUSHs(sv_2mortal(newSVpv(comm, 0)));
	327	call_pv("main::trace_unhandled", G_SCALAR);
	328	}
	329	SPAGAIN;
	330	PUTBACK;
	331	FREETMPS;
	332	LEAVE;
	333	}
	334
	335	static void run_start_sub(void)
	336	{
	337	dSP; /* access to Perl stack */
	338	PUSHMARK(SP);
	339
	340	if (get_cv("main::trace_begin", 0))
	341	call_pv("main::trace_begin", G_DISCARD \| G_NOARGS);
	342	}
	343
	344	/*
	345	* Start trace script
	346	*/
586bc5cc	347	static int perl_start_script(const char script, int argc, const char *argv)
16c632de	348	{
586bc5cc TZ	349	const char **command_line;
586bc5cc TZ	350	int i, err = 0;
16c632de	351
586bc5cc TZ	352	command_line = malloc((argc + 2) * sizeof(const char *));
586bc5cc TZ	353	command_line[0] = "";
16c632de	354	command_line[1] = script;
586bc5cc TZ	355	for (i = 2; i < argc + 2; i++)
586bc5cc TZ	356	command_line[i] = argv[i - 2];
16c632de TZ	357
	358	my_perl = perl_alloc();
	359	perl_construct(my_perl);
	360
586bc5cc TZ	361	if (perl_parse(my_perl, xs_init, argc + 2, (char **)command_line,
	362	(char **)NULL)) {
	363	err = -1;
	364	goto error;
	365	}
16c632de	366
8f11d85a TZ	367	if (perl_run(my_perl)) {
	368	err = -1;
	369	goto error;
	370	}
	371
586bc5cc TZ	372	if (SvTRUE(ERRSV)) {
	373	err = -1;
	374	goto error;
	375	}
16c632de TZ	376
	377	run_start_sub();
	378
586bc5cc	379	free(command_line);
16c632de	380	return 0;
586bc5cc TZ	381	error:
	382	perl_free(my_perl);
	383	free(command_line);
	384
	385	return err;
16c632de TZ	386	}
	387
	388	/*
	389	* Stop trace script
	390	*/
	391	static int perl_stop_script(void)
	392	{
	393	dSP; /* access to Perl stack */
	394	PUSHMARK(SP);
	395
	396	if (get_cv("main::trace_end", 0))
	397	call_pv("main::trace_end", G_DISCARD \| G_NOARGS);
	398
	399	perl_destruct(my_perl);
	400	perl_free(my_perl);
	401
16c632de TZ	402	return 0;
	403	}
	404
	405	static int perl_generate_script(const char *outfile)
	406	{
	407	struct event *event = NULL;
	408	struct format_field *f;
	409	char fname[PATH_MAX];
	410	int not_first, count;
	411	FILE *ofp;
	412
	413	sprintf(fname, "%s.pl", outfile);
	414	ofp = fopen(fname, "w");
	415	if (ofp == NULL) {
	416	fprintf(stderr, "couldn't open %s\n", fname);
	417	return -1;
	418	}
	419
133dc4c3 IM	420	fprintf(ofp, "# perf script event handlers, "
133dc4c3 IM	421	"generated by perf script -g perl\n");
16c632de TZ	422
	423	fprintf(ofp, "# Licensed under the terms of the GNU GPL"
	424	" License version 2\n\n");
	425
	426	fprintf(ofp, "# The common_* event handler fields are the most useful "
	427	"fields common to\n");
	428
	429	fprintf(ofp, "# all events. They don't necessarily correspond to "
	430	"the 'common_*' fields\n");
	431
	432	fprintf(ofp, "# in the format files. Those fields not available as "
	433	"handler params can\n");
	434
	435	fprintf(ofp, "# be retrieved using Perl functions of the form "
	436	"common_*($context).\n");
	437
	438	fprintf(ofp, "# See Context.pm for the list of available "
	439	"functions.\n\n");
	440
	441	fprintf(ofp, "use lib \"$ENV{'PERF_EXEC_PATH'}/scripts/perl/"
	442	"Perf-Trace-Util/lib\";\n");
	443
	444	fprintf(ofp, "use lib \"./Perf-Trace-Util/lib\";\n");
	445	fprintf(ofp, "use Perf::Trace::Core;\n");
	446	fprintf(ofp, "use Perf::Trace::Context;\n");
	447	fprintf(ofp, "use Perf::Trace::Util;\n\n");
	448
	449	fprintf(ofp, "sub trace_begin\n{\n\t# optional\n}\n\n");
	450	fprintf(ofp, "sub trace_end\n{\n\t# optional\n}\n\n");
	451
	452	while ((event = trace_find_next_event(event))) {
	453	fprintf(ofp, "sub %s::%s\n{\n", event->system, event->name);
	454	fprintf(ofp, "\tmy (");
	455
	456	fprintf(ofp, "$event_name, ");
	457	fprintf(ofp, "$context, ");
	458	fprintf(ofp, "$common_cpu, ");
	459	fprintf(ofp, "$common_secs, ");
	460	fprintf(ofp, "$common_nsecs,\n");
	461	fprintf(ofp, "\t $common_pid, ");
	462	fprintf(ofp, "$common_comm,\n\t ");
	463
	464	not_first = 0;
	465	count = 0;
	466
	467	for (f = event->format.fields; f; f = f->next) {
	468	if (not_first++)
	469	fprintf(ofp, ", ");
	470	if (++count % 5 == 0)
	471	fprintf(ofp, "\n\t ");
	472
	473	fprintf(ofp, "$%s", f->name);
	474	}
	475	fprintf(ofp, ") = @_;\n\n");
	476
	477	fprintf(ofp, "\tprint_header($event_name, $common_cpu, "
	478	"$common_secs, $common_nsecs,\n\t "
	479	"$common_pid, $common_comm);\n\n");
	480
	481	fprintf(ofp, "\tprintf(\"");
	482
	483	not_first = 0;
	484	count = 0;
	485
486	for (f = event->format.fields; f; f = f->next) {
487	if (not_first++)
488	fprintf(ofp, ", ");
489	if (count && count % 4 == 0) {
490	fprintf(ofp, "\".\n\t \"");
491	}
492	count++;
493
494	fprintf(ofp, "%s=", f->name);
495	if (f->flags & FIELD_IS_STRING \|\|
496	f->flags & FIELD_IS_FLAG \|\|
497	f->flags & FIELD_IS_SYMBOLIC)
498	fprintf(ofp, "%%s");
499	else if (f->flags & FIELD_IS_SIGNED)
500	fprintf(ofp, "%%d");
501	else
502	fprintf(ofp, "%%u");
503	}
504
505	fprintf(ofp, "\\n\",\n\t ");
506
507	not_first = 0;
508	count = 0;
509
510	for (f = event->format.fields; f; f = f->next) {
511	if (not_first++)
512	fprintf(ofp, ", ");
513
514	if (++count % 5 == 0)
515	fprintf(ofp, "\n\t ");
516
517	if (f->flags & FIELD_IS_FLAG) {
518	if ((count - 1) % 5 != 0) {
519	fprintf(ofp, "\n\t ");
520	count = 4;
521	}
522	fprintf(ofp, "flag_str(\"");
523	fprintf(ofp, "%s::%s\", ", event->system,
524	event->name);
525	fprintf(ofp, "\"%s\", $%s)", f->name,
526	f->name);
527	} else if (f->flags & FIELD_IS_SYMBOLIC) {
528	if ((count - 1) % 5 != 0) {
529	fprintf(ofp, "\n\t ");
530	count = 4;
531	}
532	fprintf(ofp, "symbol_str(\"");
533	fprintf(ofp, "%s::%s\", ", event->system,
534	event->name);
535	fprintf(ofp, "\"%s\", $%s)", f->name,
536	f->name);
537	} else
538	fprintf(ofp, "$%s", f->name);
539	}
540
541	fprintf(ofp, ");\n");
542	fprintf(ofp, "}\n\n");
543	}
544
545	fprintf(ofp, "sub trace_unhandled\n{\n\tmy ($event_name, $context, "
546	"$common_cpu, $common_secs, $common_nsecs,\n\t "
547	"$common_pid, $common_comm) = @_;\n\n");
548
549	fprintf(ofp, "\tprint_header($event_name, $common_cpu, "
550	"$common_secs, $common_nsecs,\n\t $common_pid, "
551	"$common_comm);\n}\n\n");
552
553	fprintf(ofp, "sub print_header\n{\n"
554	"\tmy ($event_name, $cpu, $secs, $nsecs, $pid, $comm) = @_;\n\n"
555	"\tprintf(\"%%-20s %%5u %%05u.%%09u %%8u %%-20s \",\n\t "
556	"$event_name, $cpu, $secs, $nsecs, $pid, $comm);\n}");
557
558	fclose(ofp);
559
560	fprintf(stderr, "generated Perl script: %s\n", fname);
561
562	return 0;
563	}
564
565	struct scripting_ops perl_scripting_ops = {
566	.name = "Perl",
567	.start_script = perl_start_script,
568	.stop_script = perl_stop_script,
569	.process_event = perl_process_event,
570	.generate_script = perl_generate_script,
571	};