/*
 * 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 <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <linux/bitmap.h>
#include <linux/time64.h>
#include <event-parse.h>

#include <stdbool.h>
/* perl needs the following define, right after including stdbool.h */
#define HAS_BOOL
#include <EXTERN.h>
#include <perl.h>

#include "../callchain.h"
#include "../dso.h"
#include "../machine.h"
#include "../map.h"
#include "../symbol.h"
#include "../thread.h"
#include "../event.h"
#include "../trace-event.h"
#include "../evsel.h"
#include "../debug.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 TRACE_EVENT_TYPE_MAX                            \
        ((1 << (sizeof(unsigned short) * 8)) - 1)

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 tep_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 tep_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 tep_event *event,
                                 const char *ev_name,
                                 struct tep_print_arg *args)
{
        if (args == NULL)
                return;

        switch (args->type) {
        case TEP_PRINT_NULL:
                break;
        case TEP_PRINT_ATOM:
                define_flag_value(ev_name, cur_field_name, "0",
                                  args->atom.atom);
                zero_flag_atom = 0;
                break;
        case TEP_PRINT_FIELD:
                free(cur_field_name);
                cur_field_name = strdup(args->field.name);
                break;
        case TEP_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 TEP_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 TEP_PRINT_HEX:
        case TEP_PRINT_HEX_STR:
                define_event_symbols(event, ev_name, args->hex.field);
                define_event_symbols(event, ev_name, args->hex.size);
                break;
        case TEP_PRINT_INT_ARRAY:
                define_event_symbols(event, ev_name, args->int_array.field);
                define_event_symbols(event, ev_name, args->int_array.count);
                define_event_symbols(event, ev_name, args->int_array.el_size);
                break;
        case TEP_PRINT_BSTRING:
        case TEP_PRINT_DYNAMIC_ARRAY:
        case TEP_PRINT_DYNAMIC_ARRAY_LEN:
        case TEP_PRINT_STRING:
        case TEP_PRINT_BITMASK:
                break;
        case TEP_PRINT_TYPE:
                define_event_symbols(event, ev_name, args->typecast.item);
                break;
        case TEP_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;
        case TEP_PRINT_FUNC:
        default:
                pr_err("Unsupported print arg type\n");
                /* we should warn... */
                return;
        }

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

static SV *perl_process_callchain(struct perf_sample *sample,
                                  struct evsel *evsel,
                                  struct addr_location *al)
{
        struct callchain_cursor *cursor;
        AV *list;

        list = newAV();
        if (!list)
                goto exit;

        if (!symbol_conf.use_callchain || !sample->callchain)
                goto exit;

        cursor = get_tls_callchain_cursor();

        if (thread__resolve_callchain(al->thread, cursor, evsel,
                                      sample, NULL, NULL, scripting_max_stack) != 0) {
                pr_err("Failed to resolve callchain. Skipping\n");
                goto exit;
        }
        callchain_cursor_commit(cursor);


        while (1) {
                HV *elem;
                struct callchain_cursor_node *node;
                node = callchain_cursor_current(cursor);
                if (!node)
                        break;

                elem = newHV();
                if (!elem)
                        goto exit;

                if (!hv_stores(elem, "ip", newSVuv(node->ip))) {
                        hv_undef(elem);
                        goto exit;
                }

                if (node->ms.sym) {
                        HV *sym = newHV();
                        if (!sym) {
                                hv_undef(elem);
                                goto exit;
                        }
                        if (!hv_stores(sym, "start",   newSVuv(node->ms.sym->start)) ||
                            !hv_stores(sym, "end",     newSVuv(node->ms.sym->end)) ||
                            !hv_stores(sym, "binding", newSVuv(node->ms.sym->binding)) ||
                            !hv_stores(sym, "name",    newSVpvn(node->ms.sym->name,
                                                                node->ms.sym->namelen)) ||
                            !hv_stores(elem, "sym",    newRV_noinc((SV*)sym))) {
                                hv_undef(sym);
                                hv_undef(elem);
                                goto exit;
                        }
                }

                if (node->ms.map) {
                        struct map *map = node->ms.map;
                        struct dso *dso = map ? map__dso(map) : NULL;
                        const char *dsoname = "[unknown]";

                        if (dso) {
                                if (symbol_conf.show_kernel_path && dso__long_name(dso))
                                        dsoname = dso__long_name(dso);
                                else
                                        dsoname = dso__name(dso);
                        }
                        if (!hv_stores(elem, "dso", newSVpv(dsoname,0))) {
                                hv_undef(elem);
                                goto exit;
                        }
                }

                callchain_cursor_advance(cursor);
                av_push(list, newRV_noinc((SV*)elem));
        }

exit:
        return newRV_noinc((SV*)list);
}

static void perl_process_tracepoint(struct perf_sample *sample,
                                    struct evsel *evsel,
                                    struct addr_location *al)
{
        struct thread *thread = al->thread;
        struct tep_event *event;
        struct tep_format_field *field;
        static char handler[256];
        unsigned long long val;
        unsigned long s, ns;
        int pid;
        int cpu = sample->cpu;
        void *data = sample->raw_data;
        unsigned long long nsecs = sample->time;
        const char *comm = thread__comm_str(thread);
        DECLARE_BITMAP(events_defined, TRACE_EVENT_TYPE_MAX);

        bitmap_zero(events_defined, TRACE_EVENT_TYPE_MAX);
        dSP;

        if (evsel->core.attr.type != PERF_TYPE_TRACEPOINT)
                return;

        event = evsel__tp_format(evsel);
        if (!event) {
                pr_debug("ug! no event found for type %" PRIu64, (u64)evsel->core.attr.config);
                return;
        }

        pid = raw_field_value(event, "common_pid", data);

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

        if (!__test_and_set_bit(event->id, events_defined))
                define_event_symbols(event, handler, event->print_fmt.args);

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

        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)));
        XPUSHs(sv_2mortal(perl_process_callchain(sample, evsel, al)));

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

        for (field = event->format.fields; field; field = field->next) {
                if (field->flags & TEP_FIELD_IS_STRING) {
                        int offset;
                        if (field->flags & TEP_FIELD_IS_DYNAMIC) {
                                offset = *(int *)(data + field->offset);
                                offset &= 0xffff;
                                if (tep_field_is_relative(field->flags))
                                        offset += field->offset + field->size;
                        } else
                                offset = field->offset;
                        XPUSHs(sv_2mortal(newSVpv((char *)data + offset, 0)));
                } else { /* FIELD_IS_NUMERIC */
                        val = read_size(event, data + field->offset,
                                        field->size);
                        if (field->flags & TEP_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)));
                XPUSHs(sv_2mortal(perl_process_callchain(sample, evsel, al)));
                call_pv("main::trace_unhandled", G_SCALAR);
        }
        SPAGAIN;
        PUTBACK;
        FREETMPS;
        LEAVE;
}

static void perl_process_event_generic(union perf_event *event,
                                       struct perf_sample *sample,
                                       struct evsel *evsel)
{
        dSP;

        if (!get_cv("process_event", 0))
                return;

        ENTER;
        SAVETMPS;
        PUSHMARK(SP);
        XPUSHs(sv_2mortal(newSVpvn((const char *)event, event->header.size)));
        XPUSHs(sv_2mortal(newSVpvn((const char *)&evsel->core.attr, sizeof(evsel->core.attr))));
        XPUSHs(sv_2mortal(newSVpvn((const char *)sample, sizeof(*sample))));
        XPUSHs(sv_2mortal(newSVpvn((const char *)sample->raw_data, sample->raw_size)));
        PUTBACK;
        call_pv("process_event", G_SCALAR);
        SPAGAIN;
        PUTBACK;
        FREETMPS;
        LEAVE;
}

static void perl_process_event(union perf_event *event,
                               struct perf_sample *sample,
                               struct evsel *evsel,
                               struct addr_location *al,
                               struct addr_location *addr_al)
{
        scripting_context__update(scripting_context, event, sample, evsel, al, addr_al);
        perl_process_tracepoint(sample, evsel, al);
        perl_process_event_generic(event, sample, evsel);
}

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,
                             struct perf_session *session)
{
        const char **command_line;
        int i, err = 0;

        scripting_context->session = session;

        command_line = malloc((argc + 2) * sizeof(const char *));
        if (!command_line)
                return -ENOMEM;

        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;
}

static int perl_flush_script(void)
{
        return 0;
}

/*
 * 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(struct tep_handle *pevent, const char *outfile)
{
        int i, not_first, count, nr_events;
        struct tep_event **all_events;
        struct tep_event *event = NULL;
        struct tep_format_field *f;
        char fname[PATH_MAX];
        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");


        fprintf(ofp, "\n\
sub print_backtrace\n\
{\n\
        my $callchain = shift;\n\
        for my $node (@$callchain)\n\
        {\n\
                if(exists $node->{sym})\n\
                {\n\
                        printf( \"\\t[\\%%x] \\%%s\\n\", $node->{ip}, $node->{sym}{name});\n\
                }\n\
                else\n\
                {\n\
                        printf( \"\\t[\\%%x]\\n\", $node{ip});\n\
                }\n\
        }\n\
}\n\n\
");

        nr_events = tep_get_events_count(pevent);
        all_events = tep_list_events(pevent, TEP_EVENT_SORT_ID);

        for (i = 0; all_events && i < nr_events; i++) {
                event = all_events[i];
                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, ");
                fprintf(ofp, "$common_callchain,\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, $common_callchain);\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 & TEP_FIELD_IS_STRING ||
                            f->flags & TEP_FIELD_IS_FLAG ||
                            f->flags & TEP_FIELD_IS_SYMBOLIC)
                                fprintf(ofp, "%%s");
                        else if (f->flags & TEP_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 & TEP_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 & TEP_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\n");

                fprintf(ofp, "\tprint_backtrace($common_callchain);\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, $common_callchain) = @_;\n\n");

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

        fprintf(ofp,
                "\n# Packed byte string args of process_event():\n"
                "#\n"
                "# $event:\tunion perf_event\tutil/event.h\n"
                "# $attr:\tstruct perf_event_attr\tlinux/perf_event.h\n"
                "# $sample:\tstruct perf_sample\tutil/event.h\n"
                "# $raw_data:\tperf_sample->raw_data\tutil/event.h\n"
                "\n"
                "sub process_event\n"
                "{\n"
                "\tmy ($event, $attr, $sample, $raw_data) = @_;\n"
                "\n"
                "\tmy @event\t= unpack(\"LSS\", $event);\n"
                "\tmy @attr\t= unpack(\"LLQQQQQLLQQ\", $attr);\n"
                "\tmy @sample\t= unpack(\"QLLQQQQQLL\", $sample);\n"
                "\tmy @raw_data\t= unpack(\"C*\", $raw_data);\n"
                "\n"
                "\tuse Data::Dumper;\n"
                "\tprint Dumper \\@event, \\@attr, \\@sample, \\@raw_data;\n"
                "}\n");

        fclose(ofp);

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

        return 0;
}

struct scripting_ops perl_scripting_ops = {
        .name = "Perl",
        .dirname = "perl",
        .start_script = perl_start_script,
        .flush_script = perl_flush_script,
        .stop_script = perl_stop_script,
        .process_event = perl_process_event,
        .generate_script = perl_generate_script,
};