[deliverable/linux.git] / tools / perf / util / scripting-engines / trace-event-perl.c

/*
 * trace-event-perl.  Feed perf trace 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(int cpu, void *data,
			       int size __unused,
			       unsigned long long nsecs, char *comm)
{
	struct format_field *field;
	static char handler[256];
	unsigned long long val;
	unsigned long s, ns;
	struct event *event;
	int type;
	int pid;

	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 trace event handlers, "
		"generated by perf trace -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 TZ	1	/*
	2	* trace-event-perl. Feed perf trace events to an embedded Perl interpreter.
	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
248	static void perl_process_event(int cpu, void *data,
586bc5cc	249	int size __unused,
16c632de TZ	250	unsigned long long nsecs, char *comm)
	251	{
	252	struct format_field *field;
	253	static char handler[256];
	254	unsigned long long val;
	255	unsigned long s, ns;
	256	struct event *event;
	257	int type;
	258	int pid;
	259
	260	dSP;
	261
	262	type = trace_parse_common_type(data);
	263
	264	event = find_cache_event(type);
	265	if (!event)
	266	die("ug! no event found for type %d", type);
	267
	268	pid = trace_parse_common_pid(data);
	269
	270	sprintf(handler, "%s::%s", event->system, event->name);
	271
	272	s = nsecs / NSECS_PER_SEC;
	273	ns = nsecs - s * NSECS_PER_SEC;
	274
	275	scripting_context->event_data = data;
	276
	277	ENTER;
	278	SAVETMPS;
	279	PUSHMARK(SP);
	280
	281	XPUSHs(sv_2mortal(newSVpv(handler, 0)));
	282	XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context))));
	283	XPUSHs(sv_2mortal(newSVuv(cpu)));
	284	XPUSHs(sv_2mortal(newSVuv(s)));
	285	XPUSHs(sv_2mortal(newSVuv(ns)));
	286	XPUSHs(sv_2mortal(newSViv(pid)));
	287	XPUSHs(sv_2mortal(newSVpv(comm, 0)));
	288
	289	/* common fields other than pid can be accessed via xsub fns */
	290
	291	for (field = event->format.fields; field; field = field->next) {
	292	if (field->flags & FIELD_IS_STRING) {
	293	int offset;
	294	if (field->flags & FIELD_IS_DYNAMIC) {
	295	offset = (int )(data + field->offset);
	296	offset &= 0xffff;
	297	} else
	298	offset = field->offset;
	299	XPUSHs(sv_2mortal(newSVpv((char *)data + offset, 0)));
	300	} else { /* FIELD_IS_NUMERIC */
	301	val = read_size(data + field->offset, field->size);
	302	if (field->flags & FIELD_IS_SIGNED) {
	303	XPUSHs(sv_2mortal(newSViv(val)));
	304	} else {
	305	XPUSHs(sv_2mortal(newSVuv(val)));
	306	}
	307	}
	308	}
	309
	310	PUTBACK;
d1b93772	311
16c632de TZ	312	if (get_cv(handler, 0))
	313	call_pv(handler, G_SCALAR);
	314	else if (get_cv("main::trace_unhandled", 0)) {
	315	XPUSHs(sv_2mortal(newSVpv(handler, 0)));
	316	XPUSHs(sv_2mortal(newSViv(PTR2IV(scripting_context))));
	317	XPUSHs(sv_2mortal(newSVuv(cpu)));
	318	XPUSHs(sv_2mortal(newSVuv(nsecs)));
	319	XPUSHs(sv_2mortal(newSViv(pid)));
	320	XPUSHs(sv_2mortal(newSVpv(comm, 0)));
	321	call_pv("main::trace_unhandled", G_SCALAR);
	322	}
	323	SPAGAIN;
	324	PUTBACK;
	325	FREETMPS;
	326	LEAVE;
	327	}
	328
	329	static void run_start_sub(void)
	330	{
	331	dSP; /* access to Perl stack */
	332	PUSHMARK(SP);
	333
	334	if (get_cv("main::trace_begin", 0))
	335	call_pv("main::trace_begin", G_DISCARD \| G_NOARGS);
	336	}
	337
	338	/*
	339	* Start trace script
	340	*/
586bc5cc	341	static int perl_start_script(const char script, int argc, const char *argv)
16c632de	342	{
586bc5cc TZ	343	const char **command_line;
586bc5cc TZ	344	int i, err = 0;
16c632de	345
586bc5cc TZ	346	command_line = malloc((argc + 2) * sizeof(const char *));
586bc5cc TZ	347	command_line[0] = "";
16c632de	348	command_line[1] = script;
586bc5cc TZ	349	for (i = 2; i < argc + 2; i++)
586bc5cc TZ	350	command_line[i] = argv[i - 2];
16c632de TZ	351
	352	my_perl = perl_alloc();
	353	perl_construct(my_perl);
	354
586bc5cc TZ	355	if (perl_parse(my_perl, xs_init, argc + 2, (char **)command_line,
	356	(char **)NULL)) {
	357	err = -1;
	358	goto error;
	359	}
16c632de	360
8f11d85a TZ	361	if (perl_run(my_perl)) {
	362	err = -1;
	363	goto error;
	364	}
	365
586bc5cc TZ	366	if (SvTRUE(ERRSV)) {
	367	err = -1;
	368	goto error;
	369	}
16c632de TZ	370
	371	run_start_sub();
	372
586bc5cc	373	free(command_line);
16c632de	374	return 0;
586bc5cc TZ	375	error:
	376	perl_free(my_perl);
	377	free(command_line);
	378
	379	return err;
16c632de TZ	380	}
	381
	382	/*
	383	* Stop trace script
	384	*/
	385	static int perl_stop_script(void)
	386	{
	387	dSP; /* access to Perl stack */
	388	PUSHMARK(SP);
	389
	390	if (get_cv("main::trace_end", 0))
	391	call_pv("main::trace_end", G_DISCARD \| G_NOARGS);
	392
	393	perl_destruct(my_perl);
	394	perl_free(my_perl);
	395
16c632de TZ	396	return 0;
	397	}
	398
	399	static int perl_generate_script(const char *outfile)
	400	{
	401	struct event *event = NULL;
	402	struct format_field *f;
	403	char fname[PATH_MAX];
	404	int not_first, count;
	405	FILE *ofp;
	406
	407	sprintf(fname, "%s.pl", outfile);
	408	ofp = fopen(fname, "w");
	409	if (ofp == NULL) {
	410	fprintf(stderr, "couldn't open %s\n", fname);
	411	return -1;
	412	}
	413
	414	fprintf(ofp, "# perf trace event handlers, "
	415	"generated by perf trace -g perl\n");
	416
	417	fprintf(ofp, "# Licensed under the terms of the GNU GPL"
	418	" License version 2\n\n");
	419
	420	fprintf(ofp, "# The common_* event handler fields are the most useful "
	421	"fields common to\n");
	422
	423	fprintf(ofp, "# all events. They don't necessarily correspond to "
	424	"the 'common_*' fields\n");
	425
	426	fprintf(ofp, "# in the format files. Those fields not available as "
	427	"handler params can\n");
	428
	429	fprintf(ofp, "# be retrieved using Perl functions of the form "
	430	"common_*($context).\n");
	431
	432	fprintf(ofp, "# See Context.pm for the list of available "
	433	"functions.\n\n");
	434
	435	fprintf(ofp, "use lib \"$ENV{'PERF_EXEC_PATH'}/scripts/perl/"
	436	"Perf-Trace-Util/lib\";\n");
	437
	438	fprintf(ofp, "use lib \"./Perf-Trace-Util/lib\";\n");
	439	fprintf(ofp, "use Perf::Trace::Core;\n");
	440	fprintf(ofp, "use Perf::Trace::Context;\n");
	441	fprintf(ofp, "use Perf::Trace::Util;\n\n");
	442
	443	fprintf(ofp, "sub trace_begin\n{\n\t# optional\n}\n\n");
	444	fprintf(ofp, "sub trace_end\n{\n\t# optional\n}\n\n");
	445
	446	while ((event = trace_find_next_event(event))) {
	447	fprintf(ofp, "sub %s::%s\n{\n", event->system, event->name);
	448	fprintf(ofp, "\tmy (");
	449
	450	fprintf(ofp, "$event_name, ");
	451	fprintf(ofp, "$context, ");
	452	fprintf(ofp, "$common_cpu, ");
	453	fprintf(ofp, "$common_secs, ");
	454	fprintf(ofp, "$common_nsecs,\n");
	455	fprintf(ofp, "\t $common_pid, ");
	456	fprintf(ofp, "$common_comm,\n\t ");
	457
	458	not_first = 0;
	459	count = 0;
460
461	for (f = event->format.fields; f; f = f->next) {
462	if (not_first++)
463	fprintf(ofp, ", ");
464	if (++count % 5 == 0)
465	fprintf(ofp, "\n\t ");
466
467	fprintf(ofp, "$%s", f->name);
468	}
469	fprintf(ofp, ") = @_;\n\n");
470
471	fprintf(ofp, "\tprint_header($event_name, $common_cpu, "
472	"$common_secs, $common_nsecs,\n\t "
473	"$common_pid, $common_comm);\n\n");
474
475	fprintf(ofp, "\tprintf(\"");
476
477	not_first = 0;
478	count = 0;
479
480	for (f = event->format.fields; f; f = f->next) {
481	if (not_first++)
482	fprintf(ofp, ", ");
483	if (count && count % 4 == 0) {
484	fprintf(ofp, "\".\n\t \"");
485	}
486	count++;
487
488	fprintf(ofp, "%s=", f->name);
489	if (f->flags & FIELD_IS_STRING \|\|
490	f->flags & FIELD_IS_FLAG \|\|
491	f->flags & FIELD_IS_SYMBOLIC)
492	fprintf(ofp, "%%s");
493	else if (f->flags & FIELD_IS_SIGNED)
494	fprintf(ofp, "%%d");
495	else
496	fprintf(ofp, "%%u");
497	}
498
499	fprintf(ofp, "\\n\",\n\t ");
500
501	not_first = 0;
502	count = 0;
503
504	for (f = event->format.fields; f; f = f->next) {
505	if (not_first++)
506	fprintf(ofp, ", ");
507
508	if (++count % 5 == 0)
509	fprintf(ofp, "\n\t ");
510
511	if (f->flags & FIELD_IS_FLAG) {
512	if ((count - 1) % 5 != 0) {
513	fprintf(ofp, "\n\t ");
514	count = 4;
515	}
516	fprintf(ofp, "flag_str(\"");
517	fprintf(ofp, "%s::%s\", ", event->system,
518	event->name);
519	fprintf(ofp, "\"%s\", $%s)", f->name,
520	f->name);
521	} else if (f->flags & FIELD_IS_SYMBOLIC) {
522	if ((count - 1) % 5 != 0) {
523	fprintf(ofp, "\n\t ");
524	count = 4;
525	}
526	fprintf(ofp, "symbol_str(\"");
527	fprintf(ofp, "%s::%s\", ", event->system,
528	event->name);
529	fprintf(ofp, "\"%s\", $%s)", f->name,
530	f->name);
531	} else
532	fprintf(ofp, "$%s", f->name);
533	}
534
535	fprintf(ofp, ");\n");
536	fprintf(ofp, "}\n\n");
537	}
538
539	fprintf(ofp, "sub trace_unhandled\n{\n\tmy ($event_name, $context, "
540	"$common_cpu, $common_secs, $common_nsecs,\n\t "
541	"$common_pid, $common_comm) = @_;\n\n");
542
543	fprintf(ofp, "\tprint_header($event_name, $common_cpu, "
544	"$common_secs, $common_nsecs,\n\t $common_pid, "
545	"$common_comm);\n}\n\n");
546
547	fprintf(ofp, "sub print_header\n{\n"
548	"\tmy ($event_name, $cpu, $secs, $nsecs, $pid, $comm) = @_;\n\n"
549	"\tprintf(\"%%-20s %%5u %%05u.%%09u %%8u %%-20s \",\n\t "
550	"$event_name, $cpu, $secs, $nsecs, $pid, $comm);\n}");
551
552	fclose(ofp);
553
554	fprintf(stderr, "generated Perl script: %s\n", fname);
555
556	return 0;
557	}
558
559	struct scripting_ops perl_scripting_ops = {
560	.name = "Perl",
561	.start_script = perl_start_script,
562	.stop_script = perl_stop_script,
563	.process_event = perl_process_event,
564	.generate_script = perl_generate_script,
565	};