#include "builtin.h"

#include "perf.h"
#include "util/cache.h"
#include "util/debug.h"
#include <subcmd/exec-cmd.h>
#include "util/header.h"
#include <subcmd/parse-options.h>
#include "util/perf_regs.h"
#include "util/session.h"
#include "util/tool.h"
#include "util/symbol.h"
#include "util/thread.h"
#include "util/trace-event.h"
#include "util/util.h"
#include "util/evlist.h"
#include "util/evsel.h"
#include "util/sort.h"
#include "util/data.h"
#include "util/auxtrace.h"
#include "util/cpumap.h"
#include "util/thread_map.h"
#include "util/stat.h"
#include "util/string2.h"
#include "util/thread-stack.h"
#include "util/time-utils.h"
#include "print_binary.h"
#include <linux/bitmap.h>
#include <linux/kernel.h>
#include <linux/stringify.h>
#include <linux/time64.h>
#include "asm/bug.h"
#include "util/mem-events.h"
#include "util/dump-insn.h"
#include <dirent.h>
#include <errno.h>
#include <inttypes.h>
#include <signal.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>

#include "sane_ctype.h"

static char const               *script_name;
static char const               *generate_script_lang;
static bool                     debug_mode;
static u64                      last_timestamp;
static u64                      nr_unordered;
static bool                     no_callchain;
static bool                     latency_format;
static bool                     system_wide;
static bool                     print_flags;
static bool                     nanosecs;
static const char               *cpu_list;
static DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
static struct perf_stat_config  stat_config;
static int                      max_blocks;

unsigned int scripting_max_stack = PERF_MAX_STACK_DEPTH;

enum perf_output_field {
        PERF_OUTPUT_COMM            = 1U << 0,
        PERF_OUTPUT_TID             = 1U << 1,
        PERF_OUTPUT_PID             = 1U << 2,
        PERF_OUTPUT_TIME            = 1U << 3,
        PERF_OUTPUT_CPU             = 1U << 4,
        PERF_OUTPUT_EVNAME          = 1U << 5,
        PERF_OUTPUT_TRACE           = 1U << 6,
        PERF_OUTPUT_IP              = 1U << 7,
        PERF_OUTPUT_SYM             = 1U << 8,
        PERF_OUTPUT_DSO             = 1U << 9,
        PERF_OUTPUT_ADDR            = 1U << 10,
        PERF_OUTPUT_SYMOFFSET       = 1U << 11,
        PERF_OUTPUT_SRCLINE         = 1U << 12,
        PERF_OUTPUT_PERIOD          = 1U << 13,
        PERF_OUTPUT_IREGS           = 1U << 14,
        PERF_OUTPUT_BRSTACK         = 1U << 15,
        PERF_OUTPUT_BRSTACKSYM      = 1U << 16,
        PERF_OUTPUT_DATA_SRC        = 1U << 17,
        PERF_OUTPUT_WEIGHT          = 1U << 18,
        PERF_OUTPUT_CALLINDENT      = 1U << 20,
        PERF_OUTPUT_INSN            = 1U << 21,
        PERF_OUTPUT_INSNLEN         = 1U << 22,
        PERF_OUTPUT_BRSTACKINSN     = 1U << 23,
};

struct output_option {
        const char *str;
        enum perf_output_field field;
} all_output_options[] = {
        {.str = "comm",  .field = PERF_OUTPUT_COMM},
        {.str = "tid",   .field = PERF_OUTPUT_TID},
        {.str = "pid",   .field = PERF_OUTPUT_PID},
        {.str = "time",  .field = PERF_OUTPUT_TIME},
        {.str = "cpu",   .field = PERF_OUTPUT_CPU},
        {.str = "event", .field = PERF_OUTPUT_EVNAME},
        {.str = "trace", .field = PERF_OUTPUT_TRACE},
        {.str = "ip",    .field = PERF_OUTPUT_IP},
        {.str = "sym",   .field = PERF_OUTPUT_SYM},
        {.str = "dso",   .field = PERF_OUTPUT_DSO},
        {.str = "addr",  .field = PERF_OUTPUT_ADDR},
        {.str = "symoff", .field = PERF_OUTPUT_SYMOFFSET},
        {.str = "srcline", .field = PERF_OUTPUT_SRCLINE},
        {.str = "period", .field = PERF_OUTPUT_PERIOD},
        {.str = "iregs", .field = PERF_OUTPUT_IREGS},
        {.str = "brstack", .field = PERF_OUTPUT_BRSTACK},
        {.str = "brstacksym", .field = PERF_OUTPUT_BRSTACKSYM},
        {.str = "data_src", .field = PERF_OUTPUT_DATA_SRC},
        {.str = "weight",   .field = PERF_OUTPUT_WEIGHT},
        {.str = "callindent", .field = PERF_OUTPUT_CALLINDENT},
        {.str = "insn", .field = PERF_OUTPUT_INSN},
        {.str = "insnlen", .field = PERF_OUTPUT_INSNLEN},
        {.str = "brstackinsn", .field = PERF_OUTPUT_BRSTACKINSN},
};

/* default set to maintain compatibility with current format */
static struct {
        bool user_set;
        bool wildcard_set;
        unsigned int print_ip_opts;
        u64 fields;
        u64 invalid_fields;
} output[PERF_TYPE_MAX] = {

        [PERF_TYPE_HARDWARE] = {
                .user_set = false,

                .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
                              PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
                              PERF_OUTPUT_EVNAME | PERF_OUTPUT_IP |
                              PERF_OUTPUT_SYM | PERF_OUTPUT_DSO |
                              PERF_OUTPUT_PERIOD,

                .invalid_fields = PERF_OUTPUT_TRACE,
        },

        [PERF_TYPE_SOFTWARE] = {
                .user_set = false,

                .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
                              PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
                              PERF_OUTPUT_EVNAME | PERF_OUTPUT_IP |
                              PERF_OUTPUT_SYM | PERF_OUTPUT_DSO |
                              PERF_OUTPUT_PERIOD,

                .invalid_fields = PERF_OUTPUT_TRACE,
        },

        [PERF_TYPE_TRACEPOINT] = {
                .user_set = false,

                .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
                                  PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
                                  PERF_OUTPUT_EVNAME | PERF_OUTPUT_TRACE,
        },

        [PERF_TYPE_RAW] = {
                .user_set = false,

                .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
                              PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
                              PERF_OUTPUT_EVNAME | PERF_OUTPUT_IP |
                              PERF_OUTPUT_SYM | PERF_OUTPUT_DSO |
                              PERF_OUTPUT_PERIOD |  PERF_OUTPUT_ADDR |
                              PERF_OUTPUT_DATA_SRC | PERF_OUTPUT_WEIGHT,

                .invalid_fields = PERF_OUTPUT_TRACE,
        },

        [PERF_TYPE_BREAKPOINT] = {
                .user_set = false,

                .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
                              PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
                              PERF_OUTPUT_EVNAME | PERF_OUTPUT_IP |
                              PERF_OUTPUT_SYM | PERF_OUTPUT_DSO |
                              PERF_OUTPUT_PERIOD,

                .invalid_fields = PERF_OUTPUT_TRACE,
        },
};

static bool output_set_by_user(void)
{
        int j;
        for (j = 0; j < PERF_TYPE_MAX; ++j) {
                if (output[j].user_set)
                        return true;
        }
        return false;
}

static const char *output_field2str(enum perf_output_field field)
{
        int i, imax = ARRAY_SIZE(all_output_options);
        const char *str = "";

        for (i = 0; i < imax; ++i) {
                if (all_output_options[i].field == field) {
                        str = all_output_options[i].str;
                        break;
                }
        }
        return str;
}

#define PRINT_FIELD(x)  (output[attr->type].fields & PERF_OUTPUT_##x)

static int perf_evsel__do_check_stype(struct perf_evsel *evsel,
                                      u64 sample_type, const char *sample_msg,
                                      enum perf_output_field field,
                                      bool allow_user_set)
{
        struct perf_event_attr *attr = &evsel->attr;
        int type = attr->type;
        const char *evname;

        if (attr->sample_type & sample_type)
                return 0;

        if (output[type].user_set) {
                if (allow_user_set)
                        return 0;
                evname = perf_evsel__name(evsel);
                pr_err("Samples for '%s' event do not have %s attribute set. "
                       "Cannot print '%s' field.\n",
                       evname, sample_msg, output_field2str(field));
                return -1;
        }

        /* user did not ask for it explicitly so remove from the default list */
        output[type].fields &= ~field;
        evname = perf_evsel__name(evsel);
        pr_debug("Samples for '%s' event do not have %s attribute set. "
                 "Skipping '%s' field.\n",
                 evname, sample_msg, output_field2str(field));

        return 0;
}

static int perf_evsel__check_stype(struct perf_evsel *evsel,
                                   u64 sample_type, const char *sample_msg,
                                   enum perf_output_field field)
{
        return perf_evsel__do_check_stype(evsel, sample_type, sample_msg, field,
                                          false);
}

static int perf_evsel__check_attr(struct perf_evsel *evsel,
                                  struct perf_session *session)
{
        struct perf_event_attr *attr = &evsel->attr;
        bool allow_user_set;

        if (perf_header__has_feat(&session->header, HEADER_STAT))
                return 0;

        allow_user_set = perf_header__has_feat(&session->header,
                                               HEADER_AUXTRACE);

        if (PRINT_FIELD(TRACE) &&
                !perf_session__has_traces(session, "record -R"))
                return -EINVAL;

        if (PRINT_FIELD(IP)) {
                if (perf_evsel__check_stype(evsel, PERF_SAMPLE_IP, "IP",
                                            PERF_OUTPUT_IP))
                        return -EINVAL;
        }

        if (PRINT_FIELD(ADDR) &&
                perf_evsel__do_check_stype(evsel, PERF_SAMPLE_ADDR, "ADDR",
                                           PERF_OUTPUT_ADDR, allow_user_set))
                return -EINVAL;

        if (PRINT_FIELD(DATA_SRC) &&
                perf_evsel__check_stype(evsel, PERF_SAMPLE_DATA_SRC, "DATA_SRC",
                                        PERF_OUTPUT_DATA_SRC))
                return -EINVAL;

        if (PRINT_FIELD(WEIGHT) &&
                perf_evsel__check_stype(evsel, PERF_SAMPLE_WEIGHT, "WEIGHT",
                                        PERF_OUTPUT_WEIGHT))
                return -EINVAL;

        if (PRINT_FIELD(SYM) && !PRINT_FIELD(IP) && !PRINT_FIELD(ADDR)) {
                pr_err("Display of symbols requested but neither sample IP nor "
                           "sample address\nis selected. Hence, no addresses to convert "
                       "to symbols.\n");
                return -EINVAL;
        }
        if (PRINT_FIELD(SYMOFFSET) && !PRINT_FIELD(SYM)) {
                pr_err("Display of offsets requested but symbol is not"
                       "selected.\n");
                return -EINVAL;
        }
        if (PRINT_FIELD(DSO) && !PRINT_FIELD(IP) && !PRINT_FIELD(ADDR)) {
                pr_err("Display of DSO requested but neither sample IP nor "
                           "sample address\nis selected. Hence, no addresses to convert "
                       "to DSO.\n");
                return -EINVAL;
        }
        if (PRINT_FIELD(SRCLINE) && !PRINT_FIELD(IP)) {
                pr_err("Display of source line number requested but sample IP is not\n"
                       "selected. Hence, no address to lookup the source line number.\n");
                return -EINVAL;
        }
        if (PRINT_FIELD(BRSTACKINSN) &&
            !(perf_evlist__combined_branch_type(session->evlist) &
              PERF_SAMPLE_BRANCH_ANY)) {
                pr_err("Display of branch stack assembler requested, but non all-branch filter set\n"
                       "Hint: run 'perf record -b ...'\n");
                return -EINVAL;
        }
        if ((PRINT_FIELD(PID) || PRINT_FIELD(TID)) &&
                perf_evsel__check_stype(evsel, PERF_SAMPLE_TID, "TID",
                                        PERF_OUTPUT_TID|PERF_OUTPUT_PID))
                return -EINVAL;

        if (PRINT_FIELD(TIME) &&
                perf_evsel__check_stype(evsel, PERF_SAMPLE_TIME, "TIME",
                                        PERF_OUTPUT_TIME))
                return -EINVAL;

        if (PRINT_FIELD(CPU) &&
                perf_evsel__do_check_stype(evsel, PERF_SAMPLE_CPU, "CPU",
                                           PERF_OUTPUT_CPU, allow_user_set))
                return -EINVAL;

        if (PRINT_FIELD(PERIOD) &&
                perf_evsel__check_stype(evsel, PERF_SAMPLE_PERIOD, "PERIOD",
                                        PERF_OUTPUT_PERIOD))
                return -EINVAL;

        if (PRINT_FIELD(IREGS) &&
                perf_evsel__check_stype(evsel, PERF_SAMPLE_REGS_INTR, "IREGS",
                                        PERF_OUTPUT_IREGS))
                return -EINVAL;

        return 0;
}

static void set_print_ip_opts(struct perf_event_attr *attr)
{
        unsigned int type = attr->type;

        output[type].print_ip_opts = 0;
        if (PRINT_FIELD(IP))
                output[type].print_ip_opts |= EVSEL__PRINT_IP;

        if (PRINT_FIELD(SYM))
                output[type].print_ip_opts |= EVSEL__PRINT_SYM;

        if (PRINT_FIELD(DSO))
                output[type].print_ip_opts |= EVSEL__PRINT_DSO;

        if (PRINT_FIELD(SYMOFFSET))
                output[type].print_ip_opts |= EVSEL__PRINT_SYMOFFSET;

        if (PRINT_FIELD(SRCLINE))
                output[type].print_ip_opts |= EVSEL__PRINT_SRCLINE;
}

/*
 * verify all user requested events exist and the samples
 * have the expected data
 */
static int perf_session__check_output_opt(struct perf_session *session)
{
        unsigned int j;
        struct perf_evsel *evsel;

        for (j = 0; j < PERF_TYPE_MAX; ++j) {
                evsel = perf_session__find_first_evtype(session, j);

                /*
                 * even if fields is set to 0 (ie., show nothing) event must
                 * exist if user explicitly includes it on the command line
                 */
                if (!evsel && output[j].user_set && !output[j].wildcard_set) {
                        pr_err("%s events do not exist. "
                               "Remove corresponding -f option to proceed.\n",
                               event_type(j));
                        return -1;
                }

                if (evsel && output[j].fields &&
                        perf_evsel__check_attr(evsel, session))
                        return -1;

                if (evsel == NULL)
                        continue;

                set_print_ip_opts(&evsel->attr);
        }

        if (!no_callchain) {
                bool use_callchain = false;
                bool not_pipe = false;

                evlist__for_each_entry(session->evlist, evsel) {
                        not_pipe = true;
                        if (evsel->attr.sample_type & PERF_SAMPLE_CALLCHAIN) {
                                use_callchain = true;
                                break;
                        }
                }
                if (not_pipe && !use_callchain)
                        symbol_conf.use_callchain = false;
        }

        /*
         * set default for tracepoints to print symbols only
         * if callchains are present
         */
        if (symbol_conf.use_callchain &&
            !output[PERF_TYPE_TRACEPOINT].user_set) {
                struct perf_event_attr *attr;

                j = PERF_TYPE_TRACEPOINT;

                evlist__for_each_entry(session->evlist, evsel) {
                        if (evsel->attr.type != j)
                                continue;

                        attr = &evsel->attr;

                        if (attr->sample_type & PERF_SAMPLE_CALLCHAIN) {
                                output[j].fields |= PERF_OUTPUT_IP;
                                output[j].fields |= PERF_OUTPUT_SYM;
                                output[j].fields |= PERF_OUTPUT_DSO;
                                set_print_ip_opts(attr);
                                goto out;
                        }
                }
        }

out:
        return 0;
}

static void print_sample_iregs(struct perf_sample *sample,
                          struct perf_event_attr *attr)
{
        struct regs_dump *regs = &sample->intr_regs;
        uint64_t mask = attr->sample_regs_intr;
        unsigned i = 0, r;

        if (!regs)
                return;

        for_each_set_bit(r, (unsigned long *) &mask, sizeof(mask) * 8) {
                u64 val = regs->regs[i++];
                printf("%5s:0x%"PRIx64" ", perf_reg_name(r), val);
        }
}

static void print_sample_start(struct perf_sample *sample,
                               struct thread *thread,
                               struct perf_evsel *evsel)
{
        struct perf_event_attr *attr = &evsel->attr;
        unsigned long secs;
        unsigned long long nsecs;

        if (PRINT_FIELD(COMM)) {
                if (latency_format)
                        printf("%8.8s ", thread__comm_str(thread));
                else if (PRINT_FIELD(IP) && symbol_conf.use_callchain)
                        printf("%s ", thread__comm_str(thread));
                else
                        printf("%16s ", thread__comm_str(thread));
        }

        if (PRINT_FIELD(PID) && PRINT_FIELD(TID))
                printf("%5d/%-5d ", sample->pid, sample->tid);
        else if (PRINT_FIELD(PID))
                printf("%5d ", sample->pid);
        else if (PRINT_FIELD(TID))
                printf("%5d ", sample->tid);

        if (PRINT_FIELD(CPU)) {
                if (latency_format)
                        printf("%3d ", sample->cpu);
                else
                        printf("[%03d] ", sample->cpu);
        }

        if (PRINT_FIELD(TIME)) {
                nsecs = sample->time;
                secs = nsecs / NSEC_PER_SEC;
                nsecs -= secs * NSEC_PER_SEC;

                if (nanosecs)
                        printf("%5lu.%09llu: ", secs, nsecs);
                else {
                        char sample_time[32];
                        timestamp__scnprintf_usec(sample->time, sample_time, sizeof(sample_time));
                        printf("%12s: ", sample_time);
                }
        }
}

static inline char
mispred_str(struct branch_entry *br)
{
        if (!(br->flags.mispred  || br->flags.predicted))
                return '-';

        return br->flags.predicted ? 'P' : 'M';
}

static void print_sample_brstack(struct perf_sample *sample)
{
        struct branch_stack *br = sample->branch_stack;
        u64 i;

        if (!(br && br->nr))
                return;

        for (i = 0; i < br->nr; i++) {
                printf(" 0x%"PRIx64"/0x%"PRIx64"/%c/%c/%c/%d ",
                        br->entries[i].from,
                        br->entries[i].to,
                        mispred_str( br->entries + i),
                        br->entries[i].flags.in_tx? 'X' : '-',
                        br->entries[i].flags.abort? 'A' : '-',
                        br->entries[i].flags.cycles);
        }
}

static void print_sample_brstacksym(struct perf_sample *sample,
                                    struct thread *thread)
{
        struct branch_stack *br = sample->branch_stack;
        struct addr_location alf, alt;
        u64 i, from, to;

        if (!(br && br->nr))
                return;

        for (i = 0; i < br->nr; i++) {

                memset(&alf, 0, sizeof(alf));
                memset(&alt, 0, sizeof(alt));
                from = br->entries[i].from;
                to   = br->entries[i].to;

                thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, from, &alf);
                if (alf.map)
                        alf.sym = map__find_symbol(alf.map, alf.addr);

                thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, to, &alt);
                if (alt.map)
                        alt.sym = map__find_symbol(alt.map, alt.addr);

                symbol__fprintf_symname_offs(alf.sym, &alf, stdout);
                putchar('/');
                symbol__fprintf_symname_offs(alt.sym, &alt, stdout);
                printf("/%c/%c/%c/%d ",
                        mispred_str( br->entries + i),
                        br->entries[i].flags.in_tx? 'X' : '-',
                        br->entries[i].flags.abort? 'A' : '-',
                        br->entries[i].flags.cycles);
        }
}

#define MAXBB 16384UL

static int grab_bb(u8 *buffer, u64 start, u64 end,
                    struct machine *machine, struct thread *thread,
                    bool *is64bit, u8 *cpumode, bool last)
{
        long offset, len;
        struct addr_location al;
        bool kernel;

        if (!start || !end)
                return 0;

        kernel = machine__kernel_ip(machine, start);
        if (kernel)
                *cpumode = PERF_RECORD_MISC_KERNEL;
        else
                *cpumode = PERF_RECORD_MISC_USER;

        /*
         * Block overlaps between kernel and user.
         * This can happen due to ring filtering
         * On Intel CPUs the entry into the kernel is filtered,
         * but the exit is not. Let the caller patch it up.
         */
        if (kernel != machine__kernel_ip(machine, end)) {
                printf("\tblock %" PRIx64 "-%" PRIx64 " transfers between kernel and user\n",
                                start, end);
                return -ENXIO;
        }

        memset(&al, 0, sizeof(al));
        if (end - start > MAXBB - MAXINSN) {
                if (last)
                        printf("\tbrstack does not reach to final jump (%" PRIx64 "-%" PRIx64 ")\n", start, end);
                else
                        printf("\tblock %" PRIx64 "-%" PRIx64 " (%" PRIu64 ") too long to dump\n", start, end, end - start);
                return 0;
        }

        thread__find_addr_map(thread, *cpumode, MAP__FUNCTION, start, &al);
        if (!al.map || !al.map->dso) {
                printf("\tcannot resolve %" PRIx64 "-%" PRIx64 "\n", start, end);
                return 0;
        }
        if (al.map->dso->data.status == DSO_DATA_STATUS_ERROR) {
                printf("\tcannot resolve %" PRIx64 "-%" PRIx64 "\n", start, end);
                return 0;
        }

        /* Load maps to ensure dso->is_64_bit has been updated */
        map__load(al.map);

        offset = al.map->map_ip(al.map, start);
        len = dso__data_read_offset(al.map->dso, machine, offset, (u8 *)buffer,
                                    end - start + MAXINSN);

        *is64bit = al.map->dso->is_64_bit;
        if (len <= 0)
                printf("\tcannot fetch code for block at %" PRIx64 "-%" PRIx64 "\n",
                        start, end);
        return len;
}

static void print_jump(uint64_t ip, struct branch_entry *en,
                       struct perf_insn *x, u8 *inbuf, int len,
                       int insn)
{
        printf("\t%016" PRIx64 "\t%-30s\t#%s%s%s%s",
               ip,
               dump_insn(x, ip, inbuf, len, NULL),
               en->flags.predicted ? " PRED" : "",
               en->flags.mispred ? " MISPRED" : "",
               en->flags.in_tx ? " INTX" : "",
               en->flags.abort ? " ABORT" : "");
        if (en->flags.cycles) {
                printf(" %d cycles", en->flags.cycles);
                if (insn)
                        printf(" %.2f IPC", (float)insn / en->flags.cycles);
        }
        putchar('\n');
}

static void print_ip_sym(struct thread *thread, u8 cpumode, int cpu,
                         uint64_t addr, struct symbol **lastsym,
                         struct perf_event_attr *attr)
{
        struct addr_location al;
        int off;

        memset(&al, 0, sizeof(al));

        thread__find_addr_map(thread, cpumode, MAP__FUNCTION, addr, &al);
        if (!al.map)
                thread__find_addr_map(thread, cpumode, MAP__VARIABLE,
                                      addr, &al);
        if ((*lastsym) && al.addr >= (*lastsym)->start && al.addr < (*lastsym)->end)
                return;

        al.cpu = cpu;
        al.sym = NULL;
        if (al.map)
                al.sym = map__find_symbol(al.map, al.addr);

        if (!al.sym)
                return;

        if (al.addr < al.sym->end)
                off = al.addr - al.sym->start;
        else
                off = al.addr - al.map->start - al.sym->start;
        printf("\t%s", al.sym->name);
        if (off)
                printf("%+d", off);
        putchar(':');
        if (PRINT_FIELD(SRCLINE))
                map__fprintf_srcline(al.map, al.addr, "\t", stdout);
        putchar('\n');
        *lastsym = al.sym;
}

static void print_sample_brstackinsn(struct perf_sample *sample,
                                     struct thread *thread,
                                     struct perf_event_attr *attr,
                                     struct machine *machine)
{
        struct branch_stack *br = sample->branch_stack;
        u64 start, end;
        int i, insn, len, nr, ilen;
        struct perf_insn x;
        u8 buffer[MAXBB];
        unsigned off;
        struct symbol *lastsym = NULL;

        if (!(br && br->nr))
                return;
        nr = br->nr;
        if (max_blocks && nr > max_blocks + 1)
                nr = max_blocks + 1;

        x.thread = thread;
        x.cpu = sample->cpu;

        putchar('\n');

        /* Handle first from jump, of which we don't know the entry. */
        len = grab_bb(buffer, br->entries[nr-1].from,
                        br->entries[nr-1].from,
                        machine, thread, &x.is64bit, &x.cpumode, false);
        if (len > 0) {
                print_ip_sym(thread, x.cpumode, x.cpu,
                             br->entries[nr - 1].from, &lastsym, attr);
                print_jump(br->entries[nr - 1].from, &br->entries[nr - 1],
                            &x, buffer, len, 0);
        }

        /* Print all blocks */
        for (i = nr - 2; i >= 0; i--) {
                if (br->entries[i].from || br->entries[i].to)
                        pr_debug("%d: %" PRIx64 "-%" PRIx64 "\n", i,
                                 br->entries[i].from,
                                 br->entries[i].to);
                start = br->entries[i + 1].to;
                end   = br->entries[i].from;

                len = grab_bb(buffer, start, end, machine, thread, &x.is64bit, &x.cpumode, false);
                /* Patch up missing kernel transfers due to ring filters */
                if (len == -ENXIO && i > 0) {
                        end = br->entries[--i].from;
                        pr_debug("\tpatching up to %" PRIx64 "-%" PRIx64 "\n", start, end);
                        len = grab_bb(buffer, start, end, machine, thread, &x.is64bit, &x.cpumode, false);
                }
                if (len <= 0)
                        continue;

                insn = 0;
                for (off = 0;; off += ilen) {
                        uint64_t ip = start + off;

                        print_ip_sym(thread, x.cpumode, x.cpu, ip, &lastsym, attr);
                        if (ip == end) {
                                print_jump(ip, &br->entries[i], &x, buffer + off, len - off, insn);
                                break;
                        } else {
                                printf("\t%016" PRIx64 "\t%s\n", ip,
                                        dump_insn(&x, ip, buffer + off, len - off, &ilen));
                                if (ilen == 0)
                                        break;
                                insn++;
                        }
                }
        }

        /*
         * Hit the branch? In this case we are already done, and the target
         * has not been executed yet.
         */
        if (br->entries[0].from == sample->ip)
                return;
        if (br->entries[0].flags.abort)
                return;

        /*
         * Print final block upto sample
         */
        start = br->entries[0].to;
        end = sample->ip;
        len = grab_bb(buffer, start, end, machine, thread, &x.is64bit, &x.cpumode, true);
        print_ip_sym(thread, x.cpumode, x.cpu, start, &lastsym, attr);
        if (len <= 0) {
                /* Print at least last IP if basic block did not work */
                len = grab_bb(buffer, sample->ip, sample->ip,
                              machine, thread, &x.is64bit, &x.cpumode, false);
                if (len <= 0)
                        return;

                printf("\t%016" PRIx64 "\t%s\n", sample->ip,
                        dump_insn(&x, sample->ip, buffer, len, NULL));
                return;
        }
        for (off = 0; off <= end - start; off += ilen) {
                printf("\t%016" PRIx64 "\t%s\n", start + off,
                        dump_insn(&x, start + off, buffer + off, len - off, &ilen));
                if (ilen == 0)
                        break;
        }
}

static void print_sample_addr(struct perf_sample *sample,
                          struct thread *thread,
                          struct perf_event_attr *attr)
{
        struct addr_location al;

        printf("%16" PRIx64, sample->addr);

        if (!sample_addr_correlates_sym(attr))
                return;

        thread__resolve(thread, &al, sample);

        if (PRINT_FIELD(SYM)) {
                printf(" ");
                if (PRINT_FIELD(SYMOFFSET))
                        symbol__fprintf_symname_offs(al.sym, &al, stdout);
                else
                        symbol__fprintf_symname(al.sym, stdout);
        }

        if (PRINT_FIELD(DSO)) {
                printf(" (");
                map__fprintf_dsoname(al.map, stdout);
                printf(")");
        }
}

static void print_sample_callindent(struct perf_sample *sample,
                                    struct perf_evsel *evsel,
                                    struct thread *thread,
                                    struct addr_location *al)
{
        struct perf_event_attr *attr = &evsel->attr;
        size_t depth = thread_stack__depth(thread);
        struct addr_location addr_al;
        const char *name = NULL;
        static int spacing;
        int len = 0;
        u64 ip = 0;

        /*
         * The 'return' has already been popped off the stack so the depth has
         * to be adjusted to match the 'call'.
         */
        if (thread->ts && sample->flags & PERF_IP_FLAG_RETURN)
                depth += 1;

        if (sample->flags & (PERF_IP_FLAG_CALL | PERF_IP_FLAG_TRACE_BEGIN)) {
                if (sample_addr_correlates_sym(attr)) {
                        thread__resolve(thread, &addr_al, sample);
                        if (addr_al.sym)
                                name = addr_al.sym->name;
                        else
                                ip = sample->addr;
                } else {
                        ip = sample->addr;
                }
        } else if (sample->flags & (PERF_IP_FLAG_RETURN | PERF_IP_FLAG_TRACE_END)) {
                if (al->sym)
                        name = al->sym->name;
                else
                        ip = sample->ip;
        }

        if (name)
                len = printf("%*s%s", (int)depth * 4, "", name);
        else if (ip)
                len = printf("%*s%16" PRIx64, (int)depth * 4, "", ip);

        if (len < 0)
                return;

        /*
         * Try to keep the output length from changing frequently so that the
         * output lines up more nicely.
         */
        if (len > spacing || (len && len < spacing - 52))
                spacing = round_up(len + 4, 32);

        if (len < spacing)
                printf("%*s", spacing - len, "");
}

static void print_insn(struct perf_sample *sample,
                       struct perf_event_attr *attr,
                       struct thread *thread,
                       struct machine *machine)
{
        if (PRINT_FIELD(INSNLEN))
                printf(" ilen: %d", sample->insn_len);
        if (PRINT_FIELD(INSN)) {
                int i;

                printf(" insn:");
                for (i = 0; i < sample->insn_len; i++)
                        printf(" %02x", (unsigned char)sample->insn[i]);
        }
        if (PRINT_FIELD(BRSTACKINSN))
                print_sample_brstackinsn(sample, thread, attr, machine);
}

static void print_sample_bts(struct perf_sample *sample,
                             struct perf_evsel *evsel,
                             struct thread *thread,
                             struct addr_location *al,
                             struct machine *machine)
{
        struct perf_event_attr *attr = &evsel->attr;
        bool print_srcline_last = false;

        if (PRINT_FIELD(CALLINDENT))
                print_sample_callindent(sample, evsel, thread, al);

        /* print branch_from information */
        if (PRINT_FIELD(IP)) {
                unsigned int print_opts = output[attr->type].print_ip_opts;
                struct callchain_cursor *cursor = NULL;

                if (symbol_conf.use_callchain && sample->callchain &&
                    thread__resolve_callchain(al->thread, &callchain_cursor, evsel,
                                              sample, NULL, NULL, scripting_max_stack) == 0)
                        cursor = &callchain_cursor;

                if (cursor == NULL) {
                        putchar(' ');
                        if (print_opts & EVSEL__PRINT_SRCLINE) {
                                print_srcline_last = true;
                                print_opts &= ~EVSEL__PRINT_SRCLINE;
                        }
                } else
                        putchar('\n');

                sample__fprintf_sym(sample, al, 0, print_opts, cursor, stdout);
        }

        /* print branch_to information */
        if (PRINT_FIELD(ADDR) ||
            ((evsel->attr.sample_type & PERF_SAMPLE_ADDR) &&
             !output[attr->type].user_set)) {
                printf(" => ");
                print_sample_addr(sample, thread, attr);
        }

        if (print_srcline_last)
                map__fprintf_srcline(al->map, al->addr, "\n  ", stdout);

        print_insn(sample, attr, thread, machine);

        printf("\n");
}

static struct {
        u32 flags;
        const char *name;
} sample_flags[] = {
        {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL, "call"},
        {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN, "return"},
        {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CONDITIONAL, "jcc"},
        {PERF_IP_FLAG_BRANCH, "jmp"},
        {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_INTERRUPT, "int"},
        {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN | PERF_IP_FLAG_INTERRUPT, "iret"},
        {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_SYSCALLRET, "syscall"},
        {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN | PERF_IP_FLAG_SYSCALLRET, "sysret"},
        {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_ASYNC, "async"},
        {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_ASYNC | PERF_IP_FLAG_INTERRUPT, "hw int"},
        {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TX_ABORT, "tx abrt"},
        {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TRACE_BEGIN, "tr strt"},
        {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TRACE_END, "tr end"},
        {0, NULL}
};

static void print_sample_flags(u32 flags)
{
        const char *chars = PERF_IP_FLAG_CHARS;
        const int n = strlen(PERF_IP_FLAG_CHARS);
        bool in_tx = flags & PERF_IP_FLAG_IN_TX;
        const char *name = NULL;
        char str[33];
        int i, pos = 0;

        for (i = 0; sample_flags[i].name ; i++) {
                if (sample_flags[i].flags == (flags & ~PERF_IP_FLAG_IN_TX)) {
                        name = sample_flags[i].name;
                        break;
                }
        }

        for (i = 0; i < n; i++, flags >>= 1) {
                if (flags & 1)
                        str[pos++] = chars[i];
        }
        for (; i < 32; i++, flags >>= 1) {
                if (flags & 1)
                        str[pos++] = '?';
        }
        str[pos] = 0;

        if (name)
                printf("  %-7s%4s ", name, in_tx ? "(x)" : "");
        else
                printf("  %-11s ", str);
}

struct perf_script {
        struct perf_tool        tool;
        struct perf_session     *session;
        bool                    show_task_events;
        bool                    show_mmap_events;
        bool                    show_switch_events;
        bool                    allocated;
        struct cpu_map          *cpus;
        struct thread_map       *threads;
        int                     name_width;
        const char              *time_str;
        struct perf_time_interval ptime;
};

static int perf_evlist__max_name_len(struct perf_evlist *evlist)
{
        struct perf_evsel *evsel;
        int max = 0;

        evlist__for_each_entry(evlist, evsel) {
                int len = strlen(perf_evsel__name(evsel));

                max = MAX(len, max);
        }

        return max;
}

static size_t data_src__printf(u64 data_src)
{
        struct mem_info mi = { .data_src.val = data_src };
        char decode[100];
        char out[100];
        static int maxlen;
        int len;

        perf_script__meminfo_scnprintf(decode, 100, &mi);

        len = scnprintf(out, 100, "%16" PRIx64 " %s", data_src, decode);
        if (maxlen < len)
                maxlen = len;

        return printf("%-*s", maxlen, out);
}

static void process_event(struct perf_script *script,
                          struct perf_sample *sample, struct perf_evsel *evsel,
                          struct addr_location *al,
                          struct machine *machine)
{
        struct thread *thread = al->thread;
        struct perf_event_attr *attr = &evsel->attr;

        if (output[attr->type].fields == 0)
                return;

        print_sample_start(sample, thread, evsel);

        if (PRINT_FIELD(PERIOD))
                printf("%10" PRIu64 " ", sample->period);

        if (PRINT_FIELD(EVNAME)) {
                const char *evname = perf_evsel__name(evsel);

                if (!script->name_width)
                        script->name_width = perf_evlist__max_name_len(script->session->evlist);

                printf("%*s: ", script->name_width,
                       evname ? evname : "[unknown]");
        }

        if (print_flags)
                print_sample_flags(sample->flags);

        if (is_bts_event(attr)) {
                print_sample_bts(sample, evsel, thread, al, machine);
                return;
        }

        if (PRINT_FIELD(TRACE))
                event_format__print(evsel->tp_format, sample->cpu,
                                    sample->raw_data, sample->raw_size);
        if (PRINT_FIELD(ADDR))
                print_sample_addr(sample, thread, attr);

        if (PRINT_FIELD(DATA_SRC))
                data_src__printf(sample->data_src);

        if (PRINT_FIELD(WEIGHT))
                printf("%16" PRIu64, sample->weight);

        if (PRINT_FIELD(IP)) {
                struct callchain_cursor *cursor = NULL;

                if (symbol_conf.use_callchain && sample->callchain &&
                    thread__resolve_callchain(al->thread, &callchain_cursor, evsel,
                                              sample, NULL, NULL, scripting_max_stack) == 0)
                        cursor = &callchain_cursor;

                putchar(cursor ? '\n' : ' ');
                sample__fprintf_sym(sample, al, 0, output[attr->type].print_ip_opts, cursor, stdout);
        }

        if (PRINT_FIELD(IREGS))
                print_sample_iregs(sample, attr);

        if (PRINT_FIELD(BRSTACK))
                print_sample_brstack(sample);
        else if (PRINT_FIELD(BRSTACKSYM))
                print_sample_brstacksym(sample, thread);
        print_insn(sample, attr, thread, machine);
        printf("\n");
}

static struct scripting_ops     *scripting_ops;

static void __process_stat(struct perf_evsel *counter, u64 tstamp)
{
        int nthreads = thread_map__nr(counter->threads);
        int ncpus = perf_evsel__nr_cpus(counter);
        int cpu, thread;
        static int header_printed;

        if (counter->system_wide)
                nthreads = 1;

        if (!header_printed) {
                printf("%3s %8s %15s %15s %15s %15s %s\n",
                       "CPU", "THREAD", "VAL", "ENA", "RUN", "TIME", "EVENT");
                header_printed = 1;
        }

        for (thread = 0; thread < nthreads; thread++) {
                for (cpu = 0; cpu < ncpus; cpu++) {
                        struct perf_counts_values *counts;

                        counts = perf_counts(counter->counts, cpu, thread);

                        printf("%3d %8d %15" PRIu64 " %15" PRIu64 " %15" PRIu64 " %15" PRIu64 " %s\n",
                                counter->cpus->map[cpu],
                                thread_map__pid(counter->threads, thread),
                                counts->val,
                                counts->ena,
                                counts->run,
                                tstamp,
                                perf_evsel__name(counter));
                }
        }
}

static void process_stat(struct perf_evsel *counter, u64 tstamp)
{
        if (scripting_ops && scripting_ops->process_stat)
                scripting_ops->process_stat(&stat_config, counter, tstamp);
        else
                __process_stat(counter, tstamp);
}

static void process_stat_interval(u64 tstamp)
{
        if (scripting_ops && scripting_ops->process_stat_interval)
                scripting_ops->process_stat_interval(tstamp);
}

static void setup_scripting(void)
{
        setup_perl_scripting();
        setup_python_scripting();
}

static int flush_scripting(void)
{
        return scripting_ops ? scripting_ops->flush_script() : 0;
}

static int cleanup_scripting(void)
{
        pr_debug("\nperf script stopped\n");

        return scripting_ops ? scripting_ops->stop_script() : 0;
}

static int process_sample_event(struct perf_tool *tool,
                                union perf_event *event,
                                struct perf_sample *sample,
                                struct perf_evsel *evsel,
                                struct machine *machine)
{
        struct perf_script *scr = container_of(tool, struct perf_script, tool);
        struct addr_location al;

        if (perf_time__skip_sample(&scr->ptime, sample->time))
                return 0;

        if (debug_mode) {
                if (sample->time < last_timestamp) {
                        pr_err("Samples misordered, previous: %" PRIu64
                                " this: %" PRIu64 "\n", last_timestamp,
                                sample->time);
                        nr_unordered++;
                }
                last_timestamp = sample->time;
                return 0;
        }

        if (machine__resolve(machine, &al, sample) < 0) {
                pr_err("problem processing %d event, skipping it.\n",
                       event->header.type);
                return -1;
        }

        if (al.filtered)
                goto out_put;

        if (cpu_list && !test_bit(sample->cpu, cpu_bitmap))
                goto out_put;

        if (scripting_ops)
                scripting_ops->process_event(event, sample, evsel, &al);
        else
                process_event(scr, sample, evsel, &al, machine);

out_put:
        addr_location__put(&al);
        return 0;
}

static int process_attr(struct perf_tool *tool, union perf_event *event,
                        struct perf_evlist **pevlist)
{
        struct perf_script *scr = container_of(tool, struct perf_script, tool);
        struct perf_evlist *evlist;
        struct perf_evsel *evsel, *pos;
        int err;

        err = perf_event__process_attr(tool, event, pevlist);
        if (err)
                return err;

        evlist = *pevlist;
        evsel = perf_evlist__last(*pevlist);

        if (evsel->attr.type >= PERF_TYPE_MAX)
                return 0;

        evlist__for_each_entry(evlist, pos) {
                if (pos->attr.type == evsel->attr.type && pos != evsel)
                        return 0;
        }

        set_print_ip_opts(&evsel->attr);

        if (evsel->attr.sample_type)
                err = perf_evsel__check_attr(evsel, scr->session);

        return err;
}

static int process_comm_event(struct perf_tool *tool,
                              union perf_event *event,
                              struct perf_sample *sample,
                              struct machine *machine)
{
        struct thread *thread;
        struct perf_script *script = container_of(tool, struct perf_script, tool);
        struct perf_session *session = script->session;
        struct perf_evsel *evsel = perf_evlist__id2evsel(session->evlist, sample->id);
        int ret = -1;

        thread = machine__findnew_thread(machine, event->comm.pid, event->comm.tid);
        if (thread == NULL) {
                pr_debug("problem processing COMM event, skipping it.\n");
                return -1;
        }

        if (perf_event__process_comm(tool, event, sample, machine) < 0)
                goto out;

        if (!evsel->attr.sample_id_all) {
                sample->cpu = 0;
                sample->time = 0;
                sample->tid = event->comm.tid;
                sample->pid = event->comm.pid;
        }
        print_sample_start(sample, thread, evsel);
        perf_event__fprintf(event, stdout);
        ret = 0;
out:
        thread__put(thread);
        return ret;
}

static int process_fork_event(struct perf_tool *tool,
                              union perf_event *event,
                              struct perf_sample *sample,
                              struct machine *machine)
{
        struct thread *thread;
        struct perf_script *script = container_of(tool, struct perf_script, tool);
        struct perf_session *session = script->session;
        struct perf_evsel *evsel = perf_evlist__id2evsel(session->evlist, sample->id);

        if (perf_event__process_fork(tool, event, sample, machine) < 0)
                return -1;

        thread = machine__findnew_thread(machine, event->fork.pid, event->fork.tid);
        if (thread == NULL) {
                pr_debug("problem processing FORK event, skipping it.\n");
                return -1;
        }

        if (!evsel->attr.sample_id_all) {
                sample->cpu = 0;
                sample->time = event->fork.time;
                sample->tid = event->fork.tid;
                sample->pid = event->fork.pid;
        }
        print_sample_start(sample, thread, evsel);
        perf_event__fprintf(event, stdout);
        thread__put(thread);

        return 0;
}
static int process_exit_event(struct perf_tool *tool,
                              union perf_event *event,
                              struct perf_sample *sample,
                              struct machine *machine)
{
        int err = 0;
        struct thread *thread;
        struct perf_script *script = container_of(tool, struct perf_script, tool);
        struct perf_session *session = script->session;
        struct perf_evsel *evsel = perf_evlist__id2evsel(session->evlist, sample->id);

        thread = machine__findnew_thread(machine, event->fork.pid, event->fork.tid);
        if (thread == NULL) {
                pr_debug("problem processing EXIT event, skipping it.\n");
                return -1;
        }

        if (!evsel->attr.sample_id_all) {
                sample->cpu = 0;
                sample->time = 0;
                sample->tid = event->fork.tid;
                sample->pid = event->fork.pid;
        }
        print_sample_start(sample, thread, evsel);
        perf_event__fprintf(event, stdout);

        if (perf_event__process_exit(tool, event, sample, machine) < 0)
                err = -1;

        thread__put(thread);
        return err;
}

static int process_mmap_event(struct perf_tool *tool,
                              union perf_event *event,
                              struct perf_sample *sample,
                              struct machine *machine)
{
        struct thread *thread;
        struct perf_script *script = container_of(tool, struct perf_script, tool);
        struct perf_session *session = script->session;
        struct perf_evsel *evsel = perf_evlist__id2evsel(session->evlist, sample->id);

        if (perf_event__process_mmap(tool, event, sample, machine) < 0)
                return -1;

        thread = machine__findnew_thread(machine, event->mmap.pid, event->mmap.tid);
        if (thread == NULL) {
                pr_debug("problem processing MMAP event, skipping it.\n");
                return -1;
        }

        if (!evsel->attr.sample_id_all) {
                sample->cpu = 0;
                sample->time = 0;
                sample->tid = event->mmap.tid;
                sample->pid = event->mmap.pid;
        }
        print_sample_start(sample, thread, evsel);
        perf_event__fprintf(event, stdout);
        thread__put(thread);
        return 0;
}

static int process_mmap2_event(struct perf_tool *tool,
                              union perf_event *event,
                              struct perf_sample *sample,
                              struct machine *machine)
{
        struct thread *thread;
        struct perf_script *script = container_of(tool, struct perf_script, tool);
        struct perf_session *session = script->session;
        struct perf_evsel *evsel = perf_evlist__id2evsel(session->evlist, sample->id);

        if (perf_event__process_mmap2(tool, event, sample, machine) < 0)
                return -1;

        thread = machine__findnew_thread(machine, event->mmap2.pid, event->mmap2.tid);
        if (thread == NULL) {
                pr_debug("problem processing MMAP2 event, skipping it.\n");
                return -1;
        }

        if (!evsel->attr.sample_id_all) {
                sample->cpu = 0;
                sample->time = 0;
                sample->tid = event->mmap2.tid;
                sample->pid = event->mmap2.pid;
        }
        print_sample_start(sample, thread, evsel);
        perf_event__fprintf(event, stdout);
        thread__put(thread);
        return 0;
}

static int process_switch_event(struct perf_tool *tool,
                                union perf_event *event,
                                struct perf_sample *sample,
                                struct machine *machine)
{
        struct thread *thread;
        struct perf_script *script = container_of(tool, struct perf_script, tool);
        struct perf_session *session = script->session;
        struct perf_evsel *evsel = perf_evlist__id2evsel(session->evlist, sample->id);

        if (perf_event__process_switch(tool, event, sample, machine) < 0)
                return -1;

        thread = machine__findnew_thread(machine, sample->pid,
                                         sample->tid);
        if (thread == NULL) {
                pr_debug("problem processing SWITCH event, skipping it.\n");
                return -1;
        }

        print_sample_start(sample, thread, evsel);
        perf_event__fprintf(event, stdout);
        thread__put(thread);
        return 0;
}

static void sig_handler(int sig __maybe_unused)
{
        session_done = 1;
}

static int __cmd_script(struct perf_script *script)
{
        int ret;

        signal(SIGINT, sig_handler);

        /* override event processing functions */
        if (script->show_task_events) {
                script->tool.comm = process_comm_event;
                script->tool.fork = process_fork_event;
                script->tool.exit = process_exit_event;
        }
        if (script->show_mmap_events) {
                script->tool.mmap = process_mmap_event;
                script->tool.mmap2 = process_mmap2_event;
        }
        if (script->show_switch_events)
                script->tool.context_switch = process_switch_event;

        ret = perf_session__process_events(script->session);

        if (debug_mode)
                pr_err("Misordered timestamps: %" PRIu64 "\n", nr_unordered);

        return ret;
}

struct script_spec {
        struct list_head        node;
        struct scripting_ops    *ops;
        char                    spec[0];
};

static LIST_HEAD(script_specs);

static struct script_spec *script_spec__new(const char *spec,
                                            struct scripting_ops *ops)
{
        struct script_spec *s = malloc(sizeof(*s) + strlen(spec) + 1);

        if (s != NULL) {
                strcpy(s->spec, spec);
                s->ops = ops;
        }

        return s;
}

static void script_spec__add(struct script_spec *s)
{
        list_add_tail(&s->node, &script_specs);
}

static struct script_spec *script_spec__find(const char *spec)
{
        struct script_spec *s;

        list_for_each_entry(s, &script_specs, node)
                if (strcasecmp(s->spec, spec) == 0)
                        return s;
        return NULL;
}

int script_spec_register(const char *spec, struct scripting_ops *ops)
{
        struct script_spec *s;

        s = script_spec__find(spec);
        if (s)
                return -1;

        s = script_spec__new(spec, ops);
        if (!s)
                return -1;
        else
                script_spec__add(s);

        return 0;
}

static struct scripting_ops *script_spec__lookup(const char *spec)
{
        struct script_spec *s = script_spec__find(spec);
        if (!s)
                return NULL;

        return s->ops;
}

static void list_available_languages(void)
{
        struct script_spec *s;

        fprintf(stderr, "\n");
        fprintf(stderr, "Scripting language extensions (used in "
                "perf script -s [spec:]script.[spec]):\n\n");

        list_for_each_entry(s, &script_specs, node)
                fprintf(stderr, "  %-42s [%s]\n", s->spec, s->ops->name);

        fprintf(stderr, "\n");
}

static int parse_scriptname(const struct option *opt __maybe_unused,
                            const char *str, int unset __maybe_unused)
{
        char spec[PATH_MAX];
        const char *script, *ext;
        int len;

        if (strcmp(str, "lang") == 0) {
                list_available_languages();
                exit(0);
        }

        script = strchr(str, ':');
        if (script) {
                len = script - str;
                if (len >= PATH_MAX) {
                        fprintf(stderr, "invalid language specifier");
                        return -1;
                }
                strncpy(spec, str, len);
                spec[len] = '\0';
                scripting_ops = script_spec__lookup(spec);
                if (!scripting_ops) {
                        fprintf(stderr, "invalid language specifier");
                        return -1;
                }
                script++;
        } else {
                script = str;
                ext = strrchr(script, '.');
                if (!ext) {
                        fprintf(stderr, "invalid script extension");
                        return -1;
                }
                scripting_ops = script_spec__lookup(++ext);
                if (!scripting_ops) {
                        fprintf(stderr, "invalid script extension");
                        return -1;
                }
        }

        script_name = strdup(script);

        return 0;
}

static int parse_output_fields(const struct option *opt __maybe_unused,
                            const char *arg, int unset __maybe_unused)
{
        char *tok, *strtok_saveptr = NULL;
        int i, imax = ARRAY_SIZE(all_output_options);
        int j;
        int rc = 0;
        char *str = strdup(arg);
        int type = -1;

        if (!str)
                return -ENOMEM;

        /* first word can state for which event type the user is specifying
         * the fields. If no type exists, the specified fields apply to all
         * event types found in the file minus the invalid fields for a type.
         */
        tok = strchr(str, ':');
        if (tok) {
                *tok = '\0';
                tok++;
                if (!strcmp(str, "hw"))
                        type = PERF_TYPE_HARDWARE;
                else if (!strcmp(str, "sw"))
                        type = PERF_TYPE_SOFTWARE;
                else if (!strcmp(str, "trace"))
                        type = PERF_TYPE_TRACEPOINT;
                else if (!strcmp(str, "raw"))
                        type = PERF_TYPE_RAW;
                else if (!strcmp(str, "break"))
                        type = PERF_TYPE_BREAKPOINT;
                else {
                        fprintf(stderr, "Invalid event type in field string.\n");
                        rc = -EINVAL;
                        goto out;
                }

                if (output[type].user_set)
                        pr_warning("Overriding previous field request for %s events.\n",
                                   event_type(type));

                output[type].fields = 0;
                output[type].user_set = true;
                output[type].wildcard_set = false;

        } else {
                tok = str;
                if (strlen(str) == 0) {
                        fprintf(stderr,
                                "Cannot set fields to 'none' for all event types.\n");
                        rc = -EINVAL;
                        goto out;
                }

                if (output_set_by_user())
                        pr_warning("Overriding previous field request for all events.\n");

                for (j = 0; j < PERF_TYPE_MAX; ++j) {
                        output[j].fields = 0;
                        output[j].user_set = true;
                        output[j].wildcard_set = true;
                }
        }

        for (tok = strtok_r(tok, ",", &strtok_saveptr); tok; tok = strtok_r(NULL, ",", &strtok_saveptr)) {
                for (i = 0; i < imax; ++i) {
                        if (strcmp(tok, all_output_options[i].str) == 0)
                                break;
                }
                if (i == imax && strcmp(tok, "flags") == 0) {
                        print_flags = true;
                        continue;
                }
                if (i == imax) {
                        fprintf(stderr, "Invalid field requested.\n");
                        rc = -EINVAL;
                        goto out;
                }

                if (type == -1) {
                        /* add user option to all events types for
                         * which it is valid
                         */
                        for (j = 0; j < PERF_TYPE_MAX; ++j) {
                                if (output[j].invalid_fields & all_output_options[i].field) {
                                        pr_warning("\'%s\' not valid for %s events. Ignoring.\n",
                                                   all_output_options[i].str, event_type(j));
                                } else
                                        output[j].fields |= all_output_options[i].field;
                        }
                } else {
                        if (output[type].invalid_fields & all_output_options[i].field) {
                                fprintf(stderr, "\'%s\' not valid for %s events.\n",
                                         all_output_options[i].str, event_type(type));

                                rc = -EINVAL;
                                goto out;
                        }
                        output[type].fields |= all_output_options[i].field;
                }
        }

        if (type >= 0) {
                if (output[type].fields == 0) {
                        pr_debug("No fields requested for %s type. "
                                 "Events will not be displayed.\n", event_type(type));
                }
        }

out:
        free(str);
        return rc;
}

/* Helper function for filesystems that return a dent->d_type DT_UNKNOWN */
static int is_directory(const char *base_path, const struct dirent *dent)
{
        char path[PATH_MAX];
        struct stat st;

        sprintf(path, "%s/%s", base_path, dent->d_name);
        if (stat(path, &st))
                return 0;

        return S_ISDIR(st.st_mode);
}

#define for_each_lang(scripts_path, scripts_dir, lang_dirent)           \
        while ((lang_dirent = readdir(scripts_dir)) != NULL)            \
                if ((lang_dirent->d_type == DT_DIR ||                   \
                     (lang_dirent->d_type == DT_UNKNOWN &&              \
                      is_directory(scripts_path, lang_dirent))) &&      \
                    (strcmp(lang_dirent->d_name, ".")) &&               \
                    (strcmp(lang_dirent->d_name, "..")))

#define for_each_script(lang_path, lang_dir, script_dirent)             \
        while ((script_dirent = readdir(lang_dir)) != NULL)             \
                if (script_dirent->d_type != DT_DIR &&                  \
                    (script_dirent->d_type != DT_UNKNOWN ||             \
                     !is_directory(lang_path, script_dirent)))


#define RECORD_SUFFIX                   "-record"
#define REPORT_SUFFIX                   "-report"

struct script_desc {
        struct list_head        node;
        char                    *name;
        char                    *half_liner;
        char                    *args;
};

static LIST_HEAD(script_descs);

static struct script_desc *script_desc__new(const char *name)
{
        struct script_desc *s = zalloc(sizeof(*s));

        if (s != NULL && name)
                s->name = strdup(name);

        return s;
}

static void script_desc__delete(struct script_desc *s)
{
        zfree(&s->name);
        zfree(&s->half_liner);
        zfree(&s->args);
        free(s);
}

static void script_desc__add(struct script_desc *s)
{
        list_add_tail(&s->node, &script_descs);
}

static struct script_desc *script_desc__find(const char *name)
{
        struct script_desc *s;

        list_for_each_entry(s, &script_descs, node)
                if (strcasecmp(s->name, name) == 0)
                        return s;
        return NULL;
}

static struct script_desc *script_desc__findnew(const char *name)
{
        struct script_desc *s = script_desc__find(name);

        if (s)
                return s;

        s = script_desc__new(name);
        if (!s)
                goto out_delete_desc;

        script_desc__add(s);

        return s;

out_delete_desc:
        script_desc__delete(s);

        return NULL;
}

static const char *ends_with(const char *str, const char *suffix)
{
        size_t suffix_len = strlen(suffix);
        const char *p = str;

        if (strlen(str) > suffix_len) {
                p = str + strlen(str) - suffix_len;
                if (!strncmp(p, suffix, suffix_len))
                        return p;
        }

        return NULL;
}

static int read_script_info(struct script_desc *desc, const char *filename)
{
        char line[BUFSIZ], *p;
        FILE *fp;

        fp = fopen(filename, "r");
        if (!fp)
                return -1;

        while (fgets(line, sizeof(line), fp)) {
                p = ltrim(line);
                if (strlen(p) == 0)
                        continue;
                if (*p != '#')
                        continue;
                p++;
                if (strlen(p) && *p == '!')
                        continue;

                p = ltrim(p);
                if (strlen(p) && p[strlen(p) - 1] == '\n')
                        p[strlen(p) - 1] = '\0';

                if (!strncmp(p, "description:", strlen("description:"))) {
                        p += strlen("description:");
                        desc->half_liner = strdup(ltrim(p));
                        continue;
                }

                if (!strncmp(p, "args:", strlen("args:"))) {
                        p += strlen("args:");
                        desc->args = strdup(ltrim(p));
                        continue;
                }
        }

        fclose(fp);

        return 0;
}

static char *get_script_root(struct dirent *script_dirent, const char *suffix)
{
        char *script_root, *str;

        script_root = strdup(script_dirent->d_name);
        if (!script_root)
                return NULL;

        str = (char *)ends_with(script_root, suffix);
        if (!str) {
                free(script_root);
                return NULL;
        }

        *str = '\0';
        return script_root;
}

static int list_available_scripts(const struct option *opt __maybe_unused,
                                  const char *s __maybe_unused,
                                  int unset __maybe_unused)
{
        struct dirent *script_dirent, *lang_dirent;
        char scripts_path[MAXPATHLEN];
        DIR *scripts_dir, *lang_dir;
        char script_path[MAXPATHLEN];
        char lang_path[MAXPATHLEN];
        struct script_desc *desc;
        char first_half[BUFSIZ];
        char *script_root;

        snprintf(scripts_path, MAXPATHLEN, "%s/scripts", get_argv_exec_path());

        scripts_dir = opendir(scripts_path);
        if (!scripts_dir) {
                fprintf(stdout,
                        "open(%s) failed.\n"
                        "Check \"PERF_EXEC_PATH\" env to set scripts dir.\n",
                        scripts_path);
                exit(-1);
        }

        for_each_lang(scripts_path, scripts_dir, lang_dirent) {
                snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
                         lang_dirent->d_name);
                lang_dir = opendir(lang_path);
                if (!lang_dir)
                        continue;

                for_each_script(lang_path, lang_dir, script_dirent) {
                        script_root = get_script_root(script_dirent, REPORT_SUFFIX);
                        if (script_root) {
                                desc = script_desc__findnew(script_root);
                                snprintf(script_path, MAXPATHLEN, "%s/%s",
                                         lang_path, script_dirent->d_name);
                                read_script_info(desc, script_path);
                                free(script_root);
                        }
                }
        }

        fprintf(stdout, "List of available trace scripts:\n");
        list_for_each_entry(desc, &script_descs, node) {
                sprintf(first_half, "%s %s", desc->name,
                        desc->args ? desc->args : "");
                fprintf(stdout, "  %-36s %s\n", first_half,
                        desc->half_liner ? desc->half_liner : "");
        }

        exit(0);
}

/*
 * Some scripts specify the required events in their "xxx-record" file,
 * this function will check if the events in perf.data match those
 * mentioned in the "xxx-record".
 *
 * Fixme: All existing "xxx-record" are all in good formats "-e event ",
 * which is covered well now. And new parsing code should be added to
 * cover the future complexing formats like event groups etc.
 */
static int check_ev_match(char *dir_name, char *scriptname,
                        struct perf_session *session)
{
        char filename[MAXPATHLEN], evname[128];
        char line[BUFSIZ], *p;
        struct perf_evsel *pos;
        int match, len;
        FILE *fp;

        sprintf(filename, "%s/bin/%s-record", dir_name, scriptname);

        fp = fopen(filename, "r");
        if (!fp)
                return -1;

        while (fgets(line, sizeof(line), fp)) {
                p = ltrim(line);
                if (*p == '#')
                        continue;

                while (strlen(p)) {
                        p = strstr(p, "-e");
                        if (!p)
                                break;

                        p += 2;
                        p = ltrim(p);
                        len = strcspn(p, " \t");
                        if (!len)
                                break;

                        snprintf(evname, len + 1, "%s", p);

                        match = 0;
                        evlist__for_each_entry(session->evlist, pos) {
                                if (!strcmp(perf_evsel__name(pos), evname)) {
                                        match = 1;
                                        break;
                                }
                        }

                        if (!match) {
                                fclose(fp);
                                return -1;
                        }
                }
        }

        fclose(fp);
        return 0;
}

/*
 * Return -1 if none is found, otherwise the actual scripts number.
 *
 * Currently the only user of this function is the script browser, which
 * will list all statically runnable scripts, select one, execute it and

 * show the output in a perf browser.
 */
int find_scripts(char **scripts_array, char **scripts_path_array)
{
        struct dirent *script_dirent, *lang_dirent;
        char scripts_path[MAXPATHLEN], lang_path[MAXPATHLEN];
        DIR *scripts_dir, *lang_dir;
        struct perf_session *session;
        struct perf_data_file file = {
                .path = input_name,
                .mode = PERF_DATA_MODE_READ,
        };
        char *temp;
        int i = 0;

        session = perf_session__new(&file, false, NULL);
        if (!session)
                return -1;

        snprintf(scripts_path, MAXPATHLEN, "%s/scripts", get_argv_exec_path());

        scripts_dir = opendir(scripts_path);
        if (!scripts_dir) {
                perf_session__delete(session);
                return -1;
        }

        for_each_lang(scripts_path, scripts_dir, lang_dirent) {
                snprintf(lang_path, MAXPATHLEN, "%s/%s", scripts_path,
                         lang_dirent->d_name);
#ifdef NO_LIBPERL
                if (strstr(lang_path, "perl"))
                        continue;
#endif
#ifdef NO_LIBPYTHON
                if (strstr(lang_path, "python"))
                        continue;
#endif

                lang_dir = opendir(lang_path);
                if (!lang_dir)
                        continue;

                for_each_script(lang_path, lang_dir, script_dirent) {
                        /* Skip those real time scripts: xxxtop.p[yl] */
                        if (strstr(script_dirent->d_name, "top."))
                                continue;
                        sprintf(scripts_path_array[i], "%s/%s", lang_path,
                                script_dirent->d_name);
                        temp = strchr(script_dirent->d_name, '.');
                        snprintf(scripts_array[i],
                                (temp - script_dirent->d_name) + 1,
                                "%s", script_dirent->d_name);

                        if (check_ev_match(lang_path,
                                        scripts_array[i], session))
                                continue;

                        i++;
                }
                closedir(lang_dir);
        }

        closedir(scripts_dir);
        perf_session__delete(session);
        return i;
}

static char *get_script_path(const char *script_root, const char *suffix)
{
        struct dirent *script_dirent, *lang_dirent;
        char scripts_path[MAXPATHLEN];
        char script_path[MAXPATHLEN];
        DIR *scripts_dir, *lang_dir;
        char lang_path[MAXPATHLEN];
        char *__script_root;

        snprintf(scripts_path, MAXPATHLEN, "%s/scripts", get_argv_exec_path());

        scripts_dir = opendir(scripts_path);
        if (!scripts_dir)
                return NULL;

        for_each_lang(scripts_path, scripts_dir, lang_dirent) {
                snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
                         lang_dirent->d_name);
                lang_dir = opendir(lang_path);
                if (!lang_dir)
                        continue;

                for_each_script(lang_path, lang_dir, script_dirent) {
                        __script_root = get_script_root(script_dirent, suffix);
                        if (__script_root && !strcmp(script_root, __script_root)) {
                                free(__script_root);
                                closedir(lang_dir);
                                closedir(scripts_dir);
                                snprintf(script_path, MAXPATHLEN, "%s/%s",
                                         lang_path, script_dirent->d_name);
                                return strdup(script_path);
                        }
                        free(__script_root);
                }
                closedir(lang_dir);
        }
        closedir(scripts_dir);

        return NULL;
}

static bool is_top_script(const char *script_path)
{
        return ends_with(script_path, "top") == NULL ? false : true;
}

static int has_required_arg(char *script_path)
{
        struct script_desc *desc;
        int n_args = 0;
        char *p;

        desc = script_desc__new(NULL);

        if (read_script_info(desc, script_path))
                goto out;

        if (!desc->args)
                goto out;

        for (p = desc->args; *p; p++)
                if (*p == '<')
                        n_args++;
out:
        script_desc__delete(desc);

        return n_args;
}

static int have_cmd(int argc, const char **argv)
{
        char **__argv = malloc(sizeof(const char *) * argc);

        if (!__argv) {
                pr_err("malloc failed\n");
                return -1;
        }

        memcpy(__argv, argv, sizeof(const char *) * argc);
        argc = parse_options(argc, (const char **)__argv, record_options,
                             NULL, PARSE_OPT_STOP_AT_NON_OPTION);
        free(__argv);

        system_wide = (argc == 0);

        return 0;
}

static void script__setup_sample_type(struct perf_script *script)
{
        struct perf_session *session = script->session;
        u64 sample_type = perf_evlist__combined_sample_type(session->evlist);

        if (symbol_conf.use_callchain || symbol_conf.cumulate_callchain) {
                if ((sample_type & PERF_SAMPLE_REGS_USER) &&
                    (sample_type & PERF_SAMPLE_STACK_USER))
                        callchain_param.record_mode = CALLCHAIN_DWARF;
                else if (sample_type & PERF_SAMPLE_BRANCH_STACK)
                        callchain_param.record_mode = CALLCHAIN_LBR;
                else
                        callchain_param.record_mode = CALLCHAIN_FP;
        }
}

static int process_stat_round_event(struct perf_tool *tool __maybe_unused,
                                    union perf_event *event,
                                    struct perf_session *session)
{
        struct stat_round_event *round = &event->stat_round;
        struct perf_evsel *counter;

        evlist__for_each_entry(session->evlist, counter) {
                perf_stat_process_counter(&stat_config, counter);
                process_stat(counter, round->time);
        }

        process_stat_interval(round->time);
        return 0;
}

static int process_stat_config_event(struct perf_tool *tool __maybe_unused,
                                     union perf_event *event,
                                     struct perf_session *session __maybe_unused)
{
        perf_event__read_stat_config(&stat_config, &event->stat_config);
        return 0;
}

static int set_maps(struct perf_script *script)
{
        struct perf_evlist *evlist = script->session->evlist;

        if (!script->cpus || !script->threads)
                return 0;

        if (WARN_ONCE(script->allocated, "stats double allocation\n"))
                return -EINVAL;

        perf_evlist__set_maps(evlist, script->cpus, script->threads);

        if (perf_evlist__alloc_stats(evlist, true))
                return -ENOMEM;

        script->allocated = true;
        return 0;
}

static
int process_thread_map_event(struct perf_tool *tool,
                             union perf_event *event,
                             struct perf_session *session __maybe_unused)
{
        struct perf_script *script = container_of(tool, struct perf_script, tool);

        if (script->threads) {
                pr_warning("Extra thread map event, ignoring.\n");
                return 0;
        }

        script->threads = thread_map__new_event(&event->thread_map);
        if (!script->threads)
                return -ENOMEM;

        return set_maps(script);
}

static
int process_cpu_map_event(struct perf_tool *tool __maybe_unused,
                          union perf_event *event,
                          struct perf_session *session __maybe_unused)
{
        struct perf_script *script = container_of(tool, struct perf_script, tool);

        if (script->cpus) {
                pr_warning("Extra cpu map event, ignoring.\n");
                return 0;
        }

        script->cpus = cpu_map__new_data(&event->cpu_map.data);
        if (!script->cpus)
                return -ENOMEM;

        return set_maps(script);
}

int cmd_script(int argc, const char **argv)
{
        bool show_full_info = false;
        bool header = false;
        bool header_only = false;
        bool script_started = false;
        char *rec_script_path = NULL;
        char *rep_script_path = NULL;
        struct perf_session *session;
        struct itrace_synth_opts itrace_synth_opts = { .set = false, };
        char *script_path = NULL;
        const char **__argv;
        int i, j, err = 0;
        struct perf_script script = {
                .tool = {
                        .sample          = process_sample_event,
                        .mmap            = perf_event__process_mmap,
                        .mmap2           = perf_event__process_mmap2,
                        .comm            = perf_event__process_comm,
                        .exit            = perf_event__process_exit,
                        .fork            = perf_event__process_fork,
                        .attr            = process_attr,
                        .event_update   = perf_event__process_event_update,
                        .tracing_data    = perf_event__process_tracing_data,
                        .build_id        = perf_event__process_build_id,
                        .id_index        = perf_event__process_id_index,
                        .auxtrace_info   = perf_event__process_auxtrace_info,
                        .auxtrace        = perf_event__process_auxtrace,
                        .auxtrace_error  = perf_event__process_auxtrace_error,
                        .stat            = perf_event__process_stat_event,
                        .stat_round      = process_stat_round_event,
                        .stat_config     = process_stat_config_event,
                        .thread_map      = process_thread_map_event,
                        .cpu_map         = process_cpu_map_event,
                        .ordered_events  = true,
                        .ordering_requires_timestamps = true,
                },
        };
        struct perf_data_file file = {
                .mode = PERF_DATA_MODE_READ,
        };
        const struct option options[] = {
        OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
                    "dump raw trace in ASCII"),
        OPT_INCR('v', "verbose", &verbose,
                 "be more verbose (show symbol address, etc)"),
        OPT_BOOLEAN('L', "Latency", &latency_format,
                    "show latency attributes (irqs/preemption disabled, etc)"),
        OPT_CALLBACK_NOOPT('l', "list", NULL, NULL, "list available scripts",
                           list_available_scripts),
        OPT_CALLBACK('s', "script", NULL, "name",
                     "script file name (lang:script name, script name, or *)",
                     parse_scriptname),
        OPT_STRING('g', "gen-script", &generate_script_lang, "lang",
                   "generate perf-script.xx script in specified language"),
        OPT_STRING('i', "input", &input_name, "file", "input file name"),
        OPT_BOOLEAN('d', "debug-mode", &debug_mode,
                   "do various checks like samples ordering and lost events"),
        OPT_BOOLEAN(0, "header", &header, "Show data header."),
        OPT_BOOLEAN(0, "header-only", &header_only, "Show only data header."),
        OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
                   "file", "vmlinux pathname"),
        OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
                   "file", "kallsyms pathname"),
        OPT_BOOLEAN('G', "hide-call-graph", &no_callchain,
                    "When printing symbols do not display call chain"),
        OPT_CALLBACK(0, "symfs", NULL, "directory",
                     "Look for files with symbols relative to this directory",
                     symbol__config_symfs),
        OPT_CALLBACK('F', "fields", NULL, "str",
                     "comma separated output fields prepend with 'type:'. "
                     "Valid types: hw,sw,trace,raw. "
                     "Fields: comm,tid,pid,time,cpu,event,trace,ip,sym,dso,"
                     "addr,symoff,period,iregs,brstack,brstacksym,flags,"
                     "callindent,insn,insnlen,brstackinsn",
                     parse_output_fields),
        OPT_BOOLEAN('a', "all-cpus", &system_wide,
                    "system-wide collection from all CPUs"),
        OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
                   "only consider these symbols"),
        OPT_STRING(0, "stop-bt", &symbol_conf.bt_stop_list_str, "symbol[,symbol...]",
                   "Stop display of callgraph at these symbols"),
        OPT_STRING('C', "cpu", &cpu_list, "cpu", "list of cpus to profile"),
        OPT_STRING('c', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
                   "only display events for these comms"),
        OPT_STRING(0, "pid", &symbol_conf.pid_list_str, "pid[,pid...]",
                   "only consider symbols in these pids"),
        OPT_STRING(0, "tid", &symbol_conf.tid_list_str, "tid[,tid...]",
                   "only consider symbols in these tids"),
        OPT_UINTEGER(0, "max-stack", &scripting_max_stack,
                     "Set the maximum stack depth when parsing the callchain, "
                     "anything beyond the specified depth will be ignored. "
                     "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
        OPT_BOOLEAN('I', "show-info", &show_full_info,
                    "display extended information from perf.data file"),
        OPT_BOOLEAN('\0', "show-kernel-path", &symbol_conf.show_kernel_path,
                    "Show the path of [kernel.kallsyms]"),
        OPT_BOOLEAN('\0', "show-task-events", &script.show_task_events,
                    "Show the fork/comm/exit events"),
        OPT_BOOLEAN('\0', "show-mmap-events", &script.show_mmap_events,
                    "Show the mmap events"),
        OPT_BOOLEAN('\0', "show-switch-events", &script.show_switch_events,
                    "Show context switch events (if recorded)"),
        OPT_BOOLEAN('f', "force", &symbol_conf.force, "don't complain, do it"),
        OPT_INTEGER(0, "max-blocks", &max_blocks,
                    "Maximum number of code blocks to dump with brstackinsn"),
        OPT_BOOLEAN(0, "ns", &nanosecs,
                    "Use 9 decimal places when displaying time"),
        OPT_CALLBACK_OPTARG(0, "itrace", &itrace_synth_opts, NULL, "opts",
                            "Instruction Tracing options",
                            itrace_parse_synth_opts),
        OPT_BOOLEAN(0, "full-source-path", &srcline_full_filename,
                        "Show full source file name path for source lines"),
        OPT_BOOLEAN(0, "demangle", &symbol_conf.demangle,
                        "Enable symbol demangling"),
        OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
                        "Enable kernel symbol demangling"),
        OPT_STRING(0, "time", &script.time_str, "str",
                   "Time span of interest (start,stop)"),
        OPT_BOOLEAN(0, "inline", &symbol_conf.inline_name,
                    "Show inline function"),
        OPT_END()
        };
        const char * const script_subcommands[] = { "record", "report", NULL };
        const char *script_usage[] = {
                "perf script [<options>]",
                "perf script [<options>] record <script> [<record-options>] <command>",
                "perf script [<options>] report <script> [script-args]",
                "perf script [<options>] <script> [<record-options>] <command>",
                "perf script [<options>] <top-script> [script-args]",
                NULL
        };

        scripting_max_stack = sysctl_perf_event_max_stack;

        setup_scripting();

        argc = parse_options_subcommand(argc, argv, options, script_subcommands, script_usage,
                             PARSE_OPT_STOP_AT_NON_OPTION);

        file.path = input_name;
        file.force = symbol_conf.force;

        if (argc > 1 && !strncmp(argv[0], "rec", strlen("rec"))) {
                rec_script_path = get_script_path(argv[1], RECORD_SUFFIX);
                if (!rec_script_path)
                        return cmd_record(argc, argv);
        }

        if (argc > 1 && !strncmp(argv[0], "rep", strlen("rep"))) {
                rep_script_path = get_script_path(argv[1], REPORT_SUFFIX);
                if (!rep_script_path) {
                        fprintf(stderr,
                                "Please specify a valid report script"
                                "(see 'perf script -l' for listing)\n");
                        return -1;
                }
        }

        if (itrace_synth_opts.callchain &&
            itrace_synth_opts.callchain_sz > scripting_max_stack)
                scripting_max_stack = itrace_synth_opts.callchain_sz;

        /* make sure PERF_EXEC_PATH is set for scripts */
        set_argv_exec_path(get_argv_exec_path());

        if (argc && !script_name && !rec_script_path && !rep_script_path) {
                int live_pipe[2];
                int rep_args;
                pid_t pid;

                rec_script_path = get_script_path(argv[0], RECORD_SUFFIX);
                rep_script_path = get_script_path(argv[0], REPORT_SUFFIX);

                if (!rec_script_path && !rep_script_path) {
                        usage_with_options_msg(script_usage, options,
                                "Couldn't find script `%s'\n\n See perf"
                                " script -l for available scripts.\n", argv[0]);
                }

                if (is_top_script(argv[0])) {
                        rep_args = argc - 1;
                } else {
                        int rec_args;

                        rep_args = has_required_arg(rep_script_path);
                        rec_args = (argc - 1) - rep_args;
                        if (rec_args < 0) {
                                usage_with_options_msg(script_usage, options,
                                        "`%s' script requires options."
                                        "\n\n See perf script -l for available "
                                        "scripts and options.\n", argv[0]);
                        }
                }

                if (pipe(live_pipe) < 0) {
                        perror("failed to create pipe");
                        return -1;
                }

                pid = fork();
                if (pid < 0) {
                        perror("failed to fork");
                        return -1;
                }

                if (!pid) {
                        j = 0;

                        dup2(live_pipe[1], 1);
                        close(live_pipe[0]);

                        if (is_top_script(argv[0])) {
                                system_wide = true;
                        } else if (!system_wide) {
                                if (have_cmd(argc - rep_args, &argv[rep_args]) != 0) {
                                        err = -1;
                                        goto out;
                                }
                        }

                        __argv = malloc((argc + 6) * sizeof(const char *));
                        if (!__argv) {
                                pr_err("malloc failed\n");
                                err = -ENOMEM;
                                goto out;
                        }

                        __argv[j++] = "/bin/sh";
                        __argv[j++] = rec_script_path;
                        if (system_wide)
                                __argv[j++] = "-a";
                        __argv[j++] = "-q";
                        __argv[j++] = "-o";
                        __argv[j++] = "-";
                        for (i = rep_args + 1; i < argc; i++)
                                __argv[j++] = argv[i];
                        __argv[j++] = NULL;

                        execvp("/bin/sh", (char **)__argv);
                        free(__argv);
                        exit(-1);
                }

                dup2(live_pipe[0], 0);
                close(live_pipe[1]);

                __argv = malloc((argc + 4) * sizeof(const char *));
                if (!__argv) {
                        pr_err("malloc failed\n");
                        err = -ENOMEM;
                        goto out;
                }

                j = 0;
                __argv[j++] = "/bin/sh";
                __argv[j++] = rep_script_path;
                for (i = 1; i < rep_args + 1; i++)
                        __argv[j++] = argv[i];
                __argv[j++] = "-i";
                __argv[j++] = "-";
                __argv[j++] = NULL;

                execvp("/bin/sh", (char **)__argv);
                free(__argv);
                exit(-1);
        }

        if (rec_script_path)
                script_path = rec_script_path;
        if (rep_script_path)
                script_path = rep_script_path;

        if (script_path) {
                j = 0;

                if (!rec_script_path)
                        system_wide = false;
                else if (!system_wide) {
                        if (have_cmd(argc - 1, &argv[1]) != 0) {
                                err = -1;
                                goto out;
                        }
                }

                __argv = malloc((argc + 2) * sizeof(const char *));
                if (!__argv) {
                        pr_err("malloc failed\n");
                        err = -ENOMEM;
                        goto out;
                }

                __argv[j++] = "/bin/sh";
                __argv[j++] = script_path;
                if (system_wide)
                        __argv[j++] = "-a";
                for (i = 2; i < argc; i++)
                        __argv[j++] = argv[i];
                __argv[j++] = NULL;

                execvp("/bin/sh", (char **)__argv);
                free(__argv);
                exit(-1);
        }

        if (!script_name)
                setup_pager();

        session = perf_session__new(&file, false, &script.tool);
        if (session == NULL)
                return -1;

        if (header || header_only) {
                perf_session__fprintf_info(session, stdout, show_full_info);
                if (header_only)
                        goto out_delete;
        }

        if (symbol__init(&session->header.env) < 0)
                goto out_delete;

        script.session = session;
        script__setup_sample_type(&script);

        if (output[PERF_TYPE_HARDWARE].fields & PERF_OUTPUT_CALLINDENT)
                itrace_synth_opts.thread_stack = true;

        session->itrace_synth_opts = &itrace_synth_opts;

        if (cpu_list) {
                err = perf_session__cpu_bitmap(session, cpu_list, cpu_bitmap);
                if (err < 0)
                        goto out_delete;
        }

        if (!no_callchain)
                symbol_conf.use_callchain = true;
        else
                symbol_conf.use_callchain = false;

        if (session->tevent.pevent &&
            pevent_set_function_resolver(session->tevent.pevent,
                                         machine__resolve_kernel_addr,
                                         &session->machines.host) < 0) {
                pr_err("%s: failed to set libtraceevent function resolver\n", __func__);
                return -1;
        }

        if (generate_script_lang) {
                struct stat perf_stat;
                int input;

                if (output_set_by_user()) {
                        fprintf(stderr,
                                "custom fields not supported for generated scripts");
                        err = -EINVAL;
                        goto out_delete;
                }

                input = open(file.path, O_RDONLY);      /* input_name */
                if (input < 0) {
                        err = -errno;
                        perror("failed to open file");
                        goto out_delete;
                }

                err = fstat(input, &perf_stat);
                if (err < 0) {
                        perror("failed to stat file");
                        goto out_delete;
                }

                if (!perf_stat.st_size) {
                        fprintf(stderr, "zero-sized file, nothing to do!\n");
                        goto out_delete;
                }

                scripting_ops = script_spec__lookup(generate_script_lang);
                if (!scripting_ops) {
                        fprintf(stderr, "invalid language specifier");
                        err = -ENOENT;
                        goto out_delete;
                }

                err = scripting_ops->generate_script(session->tevent.pevent,
                                                     "perf-script");
                goto out_delete;
        }

        if (script_name) {
                err = scripting_ops->start_script(script_name, argc, argv);
                if (err)
                        goto out_delete;
                pr_debug("perf script started with script %s\n\n", script_name);
                script_started = true;
        }


        err = perf_session__check_output_opt(session);
        if (err < 0)
                goto out_delete;

        /* needs to be parsed after looking up reference time */
        if (perf_time__parse_str(&script.ptime, script.time_str) != 0) {
                pr_err("Invalid time string\n");
                return -EINVAL;
        }

        err = __cmd_script(&script);

        flush_scripting();

out_delete:
        perf_evlist__free_stats(session->evlist);
        perf_session__delete(session);

        if (script_started)
                cleanup_scripting();
out:
        return err;
}