data-convert-bt.c

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/*
 * CTF writing support via babeltrace.
 *
 * Copyright (C) 2014, Jiri Olsa <jolsa@redhat.com>
 * Copyright (C) 2014, Sebastian Andrzej Siewior <bigeasy@linutronix.de>
 *
 * Released under the GPL v2. (and only v2, not any later version)
 */

#include <errno.h>
#include <inttypes.h>
#include <linux/compiler.h>
#include <linux/kernel.h>
#include <babeltrace/ctf-writer/writer.h>
#include <babeltrace/ctf-writer/clock.h>
#include <babeltrace/ctf-writer/stream.h>
#include <babeltrace/ctf-writer/event.h>
#include <babeltrace/ctf-writer/event-types.h>
#include <babeltrace/ctf-writer/event-fields.h>
#include <babeltrace/ctf-ir/utils.h>
#include <babeltrace/ctf/events.h>
#include <traceevent/event-parse.h>
#include "asm/bug.h"
#include "data-convert-bt.h"
#include "session.h"
#include "util.h"
#include "debug.h"
#include "tool.h"
#include "evlist.h"
#include "evsel.h"
#include "machine.h"
#include "config.h"
#include "sane_ctype.h"

#define pr_N(n, fmt, ...) \
    eprintf(n, debug_data_convert, fmt, ##__VA_ARGS__)

#define pr(fmt, ...)  pr_N(1, pr_fmt(fmt), ##__VA_ARGS__)
#define pr2(fmt, ...) pr_N(2, pr_fmt(fmt), ##__VA_ARGS__)

#define pr_time2(t, fmt, ...) pr_time_N(2, debug_data_convert, t, pr_fmt(fmt), ##__VA_ARGS__)

struct evsel_priv {
    struct bt_ctf_event_class *event_class;
};

#define MAX_CPUS    4096

struct ctf_stream {
    struct bt_ctf_stream *stream;
    int cpu;
    u32 count;
};

struct ctf_writer {
    /* writer primitives */
    struct bt_ctf_writer         *writer;
    struct ctf_stream       **stream;
    int               stream_cnt;
    struct bt_ctf_stream_class   *stream_class;
    struct bt_ctf_clock      *clock;

    /* data types */
    union {
        struct {
            struct bt_ctf_field_type    *s64;
            struct bt_ctf_field_type    *u64;
            struct bt_ctf_field_type    *s32;
            struct bt_ctf_field_type    *u32;
            struct bt_ctf_field_type    *string;
            struct bt_ctf_field_type    *u32_hex;
            struct bt_ctf_field_type    *u64_hex;
        };
        struct bt_ctf_field_type *array[6];
    } data;
    struct bt_ctf_event_class   *comm_class;
    struct bt_ctf_event_class   *exit_class;
    struct bt_ctf_event_class   *fork_class;
    struct bt_ctf_event_class   *mmap_class;
    struct bt_ctf_event_class   *mmap2_class;
};

struct convert {
    struct perf_tool    tool;
    struct ctf_writer   writer;

    u64         events_size;
    u64         events_count;
    u64         non_sample_count;

    /* Ordered events configured queue size. */
    u64         queue_size;
};

static int value_set(struct bt_ctf_field_type *type,
             struct bt_ctf_event *event,
             const char *name, u64 val)
{
    struct bt_ctf_field *field;
    bool sign = bt_ctf_field_type_integer_get_signed(type);
    int ret;

    field = bt_ctf_field_create(type);
    if (!field) {
        pr_err("failed to create a field %s\n", name);
        return -1;
    }

    if (sign) {
        ret = bt_ctf_field_signed_integer_set_value(field, val);
        if (ret) {
            pr_err("failed to set field value %s\n", name);
            goto err;
        }
    } else {
        ret = bt_ctf_field_unsigned_integer_set_value(field, val);
        if (ret) {
            pr_err("failed to set field value %s\n", name);
            goto err;
        }
    }

    ret = bt_ctf_event_set_payload(event, name, field);
    if (ret) {
        pr_err("failed to set payload %s\n", name);
        goto err;
    }

    pr2("  SET [%s = %" PRIu64 "]\n", name, val);

err:
    bt_ctf_field_put(field);
    return ret;
}

#define __FUNC_VALUE_SET(_name, _val_type)              \
static __maybe_unused int value_set_##_name(struct ctf_writer *cw,  \
                 struct bt_ctf_event *event,        \
                 const char *name,              \
                 _val_type val)             \
{                                   \
    struct bt_ctf_field_type *type = cw->data._name;        \
    return value_set(type, event, name, (u64) val);         \
}

#define FUNC_VALUE_SET(_name) __FUNC_VALUE_SET(_name, _name)

FUNC_VALUE_SET(s32)
FUNC_VALUE_SET(u32)
FUNC_VALUE_SET(s64)
FUNC_VALUE_SET(u64)
__FUNC_VALUE_SET(u64_hex, u64)

static int string_set_value(struct bt_ctf_field *field, const char *string);
static __maybe_unused int
value_set_string(struct ctf_writer *cw, struct bt_ctf_event *event,
         const char *name, const char *string)
{
    struct bt_ctf_field_type *type = cw->data.string;
    struct bt_ctf_field *field;
    int ret = 0;

    field = bt_ctf_field_create(type);
    if (!field) {
        pr_err("failed to create a field %s\n", name);
        return -1;
    }

    ret = string_set_value(field, string);
    if (ret) {
        pr_err("failed to set value %s\n", name);
        goto err_put_field;
    }

    ret = bt_ctf_event_set_payload(event, name, field);
    if (ret)
        pr_err("failed to set payload %s\n", name);

err_put_field:
    bt_ctf_field_put(field);
    return ret;
}

static struct bt_ctf_field_type*
get_tracepoint_field_type(struct ctf_writer *cw, struct format_field *field)
{
    unsigned long flags = field->flags;

    if (flags & FIELD_IS_STRING)
        return cw->data.string;

    if (!(flags & FIELD_IS_SIGNED)) {
        /* unsigned long are mostly pointers */
        if (flags & FIELD_IS_LONG || flags & FIELD_IS_POINTER)
            return cw->data.u64_hex;
    }

    if (flags & FIELD_IS_SIGNED) {
        if (field->size == 8)
            return cw->data.s64;
        else
            return cw->data.s32;
    }

    if (field->size == 8)
        return cw->data.u64;
    else
        return cw->data.u32;
}

static unsigned long long adjust_signedness(unsigned long long value_int, int size)
{
    unsigned long long value_mask;

    /*
     * value_mask = (1 << (size * 8 - 1)) - 1.
     * Directly set value_mask for code readers.
     */
    switch (size) {
    case 1:
        value_mask = 0x7fULL;
        break;
    case 2:
        value_mask = 0x7fffULL;
        break;
    case 4:
        value_mask = 0x7fffffffULL;
        break;
    case 8:
        /*
         * For 64 bit value, return it self. There is no need
         * to fill high bit.
         */
        /* Fall through */
    default:
        /* BUG! */
        return value_int;
    }

    /* If it is a positive value, don't adjust. */
    if ((value_int & (~0ULL - value_mask)) == 0)
        return value_int;

    /* Fill upper part of value_int with 1 to make it a negative long long. */
    return (value_int & value_mask) | ~value_mask;
}

static int string_set_value(struct bt_ctf_field *field, const char *string)
{
    char *buffer = NULL;
    size_t len = strlen(string), i, p;
    int err;

    for (i = p = 0; i < len; i++, p++) {
        if (isprint(string[i])) {
            if (!buffer)
                continue;
            buffer[p] = string[i];
        } else {
            char numstr[5];

            snprintf(numstr, sizeof(numstr), "\\x%02x",
                 (unsigned int)(string[i]) & 0xff);

            if (!buffer) {
                buffer = zalloc(i + (len - i) * 4 + 2);
                if (!buffer) {
                    pr_err("failed to set unprintable string '%s'\n", string);
                    return bt_ctf_field_string_set_value(field, "UNPRINTABLE-STRING");
                }
                if (i > 0)
                    strncpy(buffer, string, i);
            }
            strncat(buffer + p, numstr, 4);
            p += 3;
        }
    }

    if (!buffer)
        return bt_ctf_field_string_set_value(field, string);
    err = bt_ctf_field_string_set_value(field, buffer);
    free(buffer);
    return err;
}

static int add_tracepoint_field_value(struct ctf_writer *cw,
                      struct bt_ctf_event_class *event_class,
                      struct bt_ctf_event *event,
                      struct perf_sample *sample,
                      struct format_field *fmtf)
{
    struct bt_ctf_field_type *type;
    struct bt_ctf_field *array_field;
    struct bt_ctf_field *field;
    const char *name = fmtf->name;
    void *data = sample->raw_data;
    unsigned long flags = fmtf->flags;
    unsigned int n_items;
    unsigned int i;
    unsigned int offset;
    unsigned int len;
    int ret;

    name = fmtf->alias;
    offset = fmtf->offset;
    len = fmtf->size;
    if (flags & FIELD_IS_STRING)
        flags &= ~FIELD_IS_ARRAY;

    if (flags & FIELD_IS_DYNAMIC) {
        unsigned long long tmp_val;

        tmp_val = pevent_read_number(fmtf->event->pevent,
                data + offset, len);
        offset = tmp_val;
        len = offset >> 16;
        offset &= 0xffff;
    }

    if (flags & FIELD_IS_ARRAY) {

        type = bt_ctf_event_class_get_field_by_name(
                event_class, name);
        array_field = bt_ctf_field_create(type);
        bt_ctf_field_type_put(type);
        if (!array_field) {
            pr_err("Failed to create array type %s\n", name);
            return -1;
        }

        len = fmtf->size / fmtf->arraylen;
        n_items = fmtf->arraylen;
    } else {
        n_items = 1;
        array_field = NULL;
    }

    type = get_tracepoint_field_type(cw, fmtf);

    for (i = 0; i < n_items; i++) {
        if (flags & FIELD_IS_ARRAY)
            field = bt_ctf_field_array_get_field(array_field, i);
        else
            field = bt_ctf_field_create(type);

        if (!field) {
            pr_err("failed to create a field %s\n", name);
            return -1;
        }

        if (flags & FIELD_IS_STRING)
            ret = string_set_value(field, data + offset + i * len);
        else {
            unsigned long long value_int;

            value_int = pevent_read_number(
                    fmtf->event->pevent,
                    data + offset + i * len, len);

            if (!(flags & FIELD_IS_SIGNED))
                ret = bt_ctf_field_unsigned_integer_set_value(
                        field, value_int);
            else
                ret = bt_ctf_field_signed_integer_set_value(
                        field, adjust_signedness(value_int, len));
        }

        if (ret) {
            pr_err("failed to set file value %s\n", name);
            goto err_put_field;
        }
        if (!(flags & FIELD_IS_ARRAY)) {
            ret = bt_ctf_event_set_payload(event, name, field);
            if (ret) {
                pr_err("failed to set payload %s\n", name);
                goto err_put_field;
            }
        }
        bt_ctf_field_put(field);
    }
    if (flags & FIELD_IS_ARRAY) {
        ret = bt_ctf_event_set_payload(event, name, array_field);
        if (ret) {
            pr_err("Failed add payload array %s\n", name);
            return -1;
        }
        bt_ctf_field_put(array_field);
    }
    return 0;

err_put_field:
    bt_ctf_field_put(field);
    return -1;
}

static int add_tracepoint_fields_values(struct ctf_writer *cw,
                    struct bt_ctf_event_class *event_class,
                    struct bt_ctf_event *event,
                    struct format_field *fields,
                    struct perf_sample *sample)
{
    struct format_field *field;
    int ret;

    for (field = fields; field; field = field->next) {
        ret = add_tracepoint_field_value(cw, event_class, event, sample,
                field);
        if (ret)
            return -1;
    }
    return 0;
}

static int add_tracepoint_values(struct ctf_writer *cw,
                 struct bt_ctf_event_class *event_class,
                 struct bt_ctf_event *event,
                 struct perf_evsel *evsel,
                 struct perf_sample *sample)
{
    struct format_field *common_fields = evsel->tp_format->format.common_fields;
    struct format_field *fields        = evsel->tp_format->format.fields;
    int ret;

    ret = add_tracepoint_fields_values(cw, event_class, event,
                       common_fields, sample);
    if (!ret)
        ret = add_tracepoint_fields_values(cw, event_class, event,
                           fields, sample);

    return ret;
}

static int
add_bpf_output_values(struct bt_ctf_event_class *event_class,
              struct bt_ctf_event *event,
              struct perf_sample *sample)
{
    struct bt_ctf_field_type *len_type, *seq_type;
    struct bt_ctf_field *len_field, *seq_field;
    unsigned int raw_size = sample->raw_size;
    unsigned int nr_elements = raw_size / sizeof(u32);
    unsigned int i;
    int ret;

    if (nr_elements * sizeof(u32) != raw_size)
        pr_warning("Incorrect raw_size (%u) in bpf output event, skip %zu bytes\n",
               raw_size, nr_elements * sizeof(u32) - raw_size);

    len_type = bt_ctf_event_class_get_field_by_name(event_class, "raw_len");
    len_field = bt_ctf_field_create(len_type);
    if (!len_field) {
        pr_err("failed to create 'raw_len' for bpf output event\n");
        ret = -1;
        goto put_len_type;
    }

    ret = bt_ctf_field_unsigned_integer_set_value(len_field, nr_elements);
    if (ret) {
        pr_err("failed to set field value for raw_len\n");
        goto put_len_field;
    }
    ret = bt_ctf_event_set_payload(event, "raw_len", len_field);
    if (ret) {
        pr_err("failed to set payload to raw_len\n");
        goto put_len_field;
    }

    seq_type = bt_ctf_event_class_get_field_by_name(event_class, "raw_data");
    seq_field = bt_ctf_field_create(seq_type);
    if (!seq_field) {
        pr_err("failed to create 'raw_data' for bpf output event\n");
        ret = -1;
        goto put_seq_type;
    }

    ret = bt_ctf_field_sequence_set_length(seq_field, len_field);
    if (ret) {
        pr_err("failed to set length of 'raw_data'\n");
        goto put_seq_field;
    }

    for (i = 0; i < nr_elements; i++) {
        struct bt_ctf_field *elem_field =
            bt_ctf_field_sequence_get_field(seq_field, i);

        ret = bt_ctf_field_unsigned_integer_set_value(elem_field,
                ((u32 *)(sample->raw_data))[i]);

        bt_ctf_field_put(elem_field);
        if (ret) {
            pr_err("failed to set raw_data[%d]\n", i);
            goto put_seq_field;
        }
    }

    ret = bt_ctf_event_set_payload(event, "raw_data", seq_field);
    if (ret)
        pr_err("failed to set payload for raw_data\n");

put_seq_field:
    bt_ctf_field_put(seq_field);
put_seq_type:
    bt_ctf_field_type_put(seq_type);
put_len_field:
    bt_ctf_field_put(len_field);
put_len_type:
    bt_ctf_field_type_put(len_type);
    return ret;
}

static int
add_callchain_output_values(struct bt_ctf_event_class *event_class,
              struct bt_ctf_event *event,
              struct ip_callchain *callchain)
{
    struct bt_ctf_field_type *len_type, *seq_type;
    struct bt_ctf_field *len_field, *seq_field;
    unsigned int nr_elements = callchain->nr;
    unsigned int i;
    int ret;

    len_type = bt_ctf_event_class_get_field_by_name(
            event_class, "perf_callchain_size");
    len_field = bt_ctf_field_create(len_type);
    if (!len_field) {
        pr_err("failed to create 'perf_callchain_size' for callchain output event\n");
        ret = -1;
        goto put_len_type;
    }

    ret = bt_ctf_field_unsigned_integer_set_value(len_field, nr_elements);
    if (ret) {
        pr_err("failed to set field value for perf_callchain_size\n");
        goto put_len_field;
    }
    ret = bt_ctf_event_set_payload(event, "perf_callchain_size", len_field);
    if (ret) {
        pr_err("failed to set payload to perf_callchain_size\n");
        goto put_len_field;
    }

    seq_type = bt_ctf_event_class_get_field_by_name(
            event_class, "perf_callchain");
    seq_field = bt_ctf_field_create(seq_type);
    if (!seq_field) {
        pr_err("failed to create 'perf_callchain' for callchain output event\n");
        ret = -1;
        goto put_seq_type;
    }

    ret = bt_ctf_field_sequence_set_length(seq_field, len_field);
    if (ret) {
        pr_err("failed to set length of 'perf_callchain'\n");
        goto put_seq_field;
    }

    for (i = 0; i < nr_elements; i++) {
        struct bt_ctf_field *elem_field =
            bt_ctf_field_sequence_get_field(seq_field, i);

        ret = bt_ctf_field_unsigned_integer_set_value(elem_field,
                ((u64 *)(callchain->ips))[i]);

        bt_ctf_field_put(elem_field);
        if (ret) {
            pr_err("failed to set callchain[%d]\n", i);
            goto put_seq_field;
        }
    }

    ret = bt_ctf_event_set_payload(event, "perf_callchain", seq_field);
    if (ret)
        pr_err("failed to set payload for raw_data\n");

put_seq_field:
    bt_ctf_field_put(seq_field);
put_seq_type:
    bt_ctf_field_type_put(seq_type);
put_len_field:
    bt_ctf_field_put(len_field);
put_len_type:
    bt_ctf_field_type_put(len_type);
    return ret;
}

static int add_generic_values(struct ctf_writer *cw,
                  struct bt_ctf_event *event,
                  struct perf_evsel *evsel,
                  struct perf_sample *sample)
{
    u64 type = evsel->attr.sample_type;
    int ret;

    /*
     * missing:
     *   PERF_SAMPLE_TIME         - not needed as we have it in
     *                              ctf event header
     *   PERF_SAMPLE_READ         - TODO
     *   PERF_SAMPLE_RAW          - tracepoint fields are handled separately
     *   PERF_SAMPLE_BRANCH_STACK - TODO
     *   PERF_SAMPLE_REGS_USER    - TODO
     *   PERF_SAMPLE_STACK_USER   - TODO
     */

    if (type & PERF_SAMPLE_IP) {
        ret = value_set_u64_hex(cw, event, "perf_ip", sample->ip);
        if (ret)
            return -1;
    }

    if (type & PERF_SAMPLE_TID) {
        ret = value_set_s32(cw, event, "perf_tid", sample->tid);
        if (ret)
            return -1;

        ret = value_set_s32(cw, event, "perf_pid", sample->pid);
        if (ret)
            return -1;
    }

    if ((type & PERF_SAMPLE_ID) ||
        (type & PERF_SAMPLE_IDENTIFIER)) {
        ret = value_set_u64(cw, event, "perf_id", sample->id);
        if (ret)
            return -1;
    }

    if (type & PERF_SAMPLE_STREAM_ID) {
        ret = value_set_u64(cw, event, "perf_stream_id", sample->stream_id);
        if (ret)
            return -1;
    }

    if (type & PERF_SAMPLE_PERIOD) {
        ret = value_set_u64(cw, event, "perf_period", sample->period);
        if (ret)
            return -1;
    }

    if (type & PERF_SAMPLE_WEIGHT) {
        ret = value_set_u64(cw, event, "perf_weight", sample->weight);
        if (ret)
            return -1;
    }

    if (type & PERF_SAMPLE_DATA_SRC) {
        ret = value_set_u64(cw, event, "perf_data_src",
                sample->data_src);
        if (ret)
            return -1;
    }

    if (type & PERF_SAMPLE_TRANSACTION) {
        ret = value_set_u64(cw, event, "perf_transaction",
                sample->transaction);
        if (ret)
            return -1;
    }

    return 0;
}

static int ctf_stream__flush(struct ctf_stream *cs)
{
    int err = 0;

    if (cs) {
        err = bt_ctf_stream_flush(cs->stream);
        if (err)
            pr_err("CTF stream %d flush failed\n", cs->cpu);

        pr("Flush stream for cpu %d (%u samples)\n",
           cs->cpu, cs->count);

        cs->count = 0;
    }

    return err;
}

static struct ctf_stream *ctf_stream__create(struct ctf_writer *cw, int cpu)
{
    struct ctf_stream *cs;
    struct bt_ctf_field *pkt_ctx   = NULL;
    struct bt_ctf_field *cpu_field = NULL;
    struct bt_ctf_stream *stream   = NULL;
    int ret;

    cs = zalloc(sizeof(*cs));
    if (!cs) {
        pr_err("Failed to allocate ctf stream\n");
        return NULL;
    }

    stream = bt_ctf_writer_create_stream(cw->writer, cw->stream_class);
    if (!stream) {
        pr_err("Failed to create CTF stream\n");
        goto out;
    }

    pkt_ctx = bt_ctf_stream_get_packet_context(stream);
    if (!pkt_ctx) {
        pr_err("Failed to obtain packet context\n");
        goto out;
    }

    cpu_field = bt_ctf_field_structure_get_field(pkt_ctx, "cpu_id");
    bt_ctf_field_put(pkt_ctx);
    if (!cpu_field) {
        pr_err("Failed to obtain cpu field\n");
        goto out;
    }

    ret = bt_ctf_field_unsigned_integer_set_value(cpu_field, (u32) cpu);
    if (ret) {
        pr_err("Failed to update CPU number\n");
        goto out;
    }

    bt_ctf_field_put(cpu_field);

    cs->cpu    = cpu;
    cs->stream = stream;
    return cs;

out:
    if (cpu_field)
        bt_ctf_field_put(cpu_field);
    if (stream)
        bt_ctf_stream_put(stream);

    free(cs);
    return NULL;
}

static void ctf_stream__delete(struct ctf_stream *cs)
{
    if (cs) {
        bt_ctf_stream_put(cs->stream);
        free(cs);
    }
}

static struct ctf_stream *ctf_stream(struct ctf_writer *cw, int cpu)
{
    struct ctf_stream *cs = cw->stream[cpu];

    if (!cs) {
        cs = ctf_stream__create(cw, cpu);
        cw->stream[cpu] = cs;
    }

    return cs;
}

static int get_sample_cpu(struct ctf_writer *cw, struct perf_sample *sample,
              struct perf_evsel *evsel)
{
    int cpu = 0;

    if (evsel->attr.sample_type & PERF_SAMPLE_CPU)
        cpu = sample->cpu;

    if (cpu > cw->stream_cnt) {
        pr_err("Event was recorded for CPU %d, limit is at %d.\n",
            cpu, cw->stream_cnt);
        cpu = 0;
    }

    return cpu;
}

#define STREAM_FLUSH_COUNT 100000

/*
 * Currently we have no other way to determine the
 * time for the stream flush other than keep track
 * of the number of events and check it against
 * threshold.
 */
static bool is_flush_needed(struct ctf_stream *cs)
{
    return cs->count >= STREAM_FLUSH_COUNT;
}

static int process_sample_event(struct perf_tool *tool,
                union perf_event *_event,
                struct perf_sample *sample,
                struct perf_evsel *evsel,
                struct machine *machine __maybe_unused)
{
    struct convert *c = container_of(tool, struct convert, tool);
    struct evsel_priv *priv = evsel->priv;
    struct ctf_writer *cw = &c->writer;
    struct ctf_stream *cs;
    struct bt_ctf_event_class *event_class;
    struct bt_ctf_event *event;
    int ret;
    unsigned long type = evsel->attr.sample_type;

    if (WARN_ONCE(!priv, "Failed to setup all events.\n"))
        return 0;

    event_class = priv->event_class;

    /* update stats */
    c->events_count++;
    c->events_size += _event->header.size;

    pr_time2(sample->time, "sample %" PRIu64 "\n", c->events_count);

    event = bt_ctf_event_create(event_class);
    if (!event) {
        pr_err("Failed to create an CTF event\n");
        return -1;
    }

    bt_ctf_clock_set_time(cw->clock, sample->time);

    ret = add_generic_values(cw, event, evsel, sample);
    if (ret)
        return -1;

    if (evsel->attr.type == PERF_TYPE_TRACEPOINT) {
        ret = add_tracepoint_values(cw, event_class, event,
                        evsel, sample);
        if (ret)
            return -1;
    }

    if (type & PERF_SAMPLE_CALLCHAIN) {
        ret = add_callchain_output_values(event_class,
                event, sample->callchain);
        if (ret)
            return -1;
    }

    if (perf_evsel__is_bpf_output(evsel)) {
        ret = add_bpf_output_values(event_class, event, sample);
        if (ret)
            return -1;
    }

    cs = ctf_stream(cw, get_sample_cpu(cw, sample, evsel));
    if (cs) {
        if (is_flush_needed(cs))
            ctf_stream__flush(cs);

        cs->count++;
        bt_ctf_stream_append_event(cs->stream, event);
    }

    bt_ctf_event_put(event);
    return cs ? 0 : -1;
}

#define __NON_SAMPLE_SET_FIELD(_name, _type, _field)    \
do {                            \
    ret = value_set_##_type(cw, event, #_field, _event->_name._field);\
    if (ret)                    \
        return -1;              \
} while(0)

#define __FUNC_PROCESS_NON_SAMPLE(_name, body)  \
static int process_##_name##_event(struct perf_tool *tool,  \
                   union perf_event *_event,    \
                   struct perf_sample *sample,  \
                   struct machine *machine) \
{                               \
    struct convert *c = container_of(tool, struct convert, tool);\
    struct ctf_writer *cw = &c->writer;         \
    struct bt_ctf_event_class *event_class = cw->_name##_class;\
    struct bt_ctf_event *event;             \
    struct ctf_stream *cs;                  \
    int ret;                        \
                                \
    c->non_sample_count++;                  \
    c->events_size += _event->header.size;          \
    event = bt_ctf_event_create(event_class);       \
    if (!event) {                       \
        pr_err("Failed to create an CTF event\n");  \
        return -1;                  \
    }                           \
                                \
    bt_ctf_clock_set_time(cw->clock, sample->time);     \
    body                            \
    cs = ctf_stream(cw, 0);                 \
    if (cs) {                       \
        if (is_flush_needed(cs))            \
            ctf_stream__flush(cs);          \
                                \
        cs->count++;                    \
        bt_ctf_stream_append_event(cs->stream, event);  \
    }                           \
    bt_ctf_event_put(event);                \
                                \
    return perf_event__process_##_name(tool, _event, sample, machine);\
}

__FUNC_PROCESS_NON_SAMPLE(comm,
    __NON_SAMPLE_SET_FIELD(comm, u32, pid);
    __NON_SAMPLE_SET_FIELD(comm, u32, tid);
    __NON_SAMPLE_SET_FIELD(comm, string, comm);
)
__FUNC_PROCESS_NON_SAMPLE(fork,
    __NON_SAMPLE_SET_FIELD(fork, u32, pid);
    __NON_SAMPLE_SET_FIELD(fork, u32, ppid);
    __NON_SAMPLE_SET_FIELD(fork, u32, tid);
    __NON_SAMPLE_SET_FIELD(fork, u32, ptid);
    __NON_SAMPLE_SET_FIELD(fork, u64, time);
)

__FUNC_PROCESS_NON_SAMPLE(exit,
    __NON_SAMPLE_SET_FIELD(fork, u32, pid);
    __NON_SAMPLE_SET_FIELD(fork, u32, ppid);
    __NON_SAMPLE_SET_FIELD(fork, u32, tid);
    __NON_SAMPLE_SET_FIELD(fork, u32, ptid);
    __NON_SAMPLE_SET_FIELD(fork, u64, time);
)
__FUNC_PROCESS_NON_SAMPLE(mmap,
    __NON_SAMPLE_SET_FIELD(mmap, u32, pid);
    __NON_SAMPLE_SET_FIELD(mmap, u32, tid);
    __NON_SAMPLE_SET_FIELD(mmap, u64_hex, start);
    __NON_SAMPLE_SET_FIELD(mmap, string, filename);
)
__FUNC_PROCESS_NON_SAMPLE(mmap2,
    __NON_SAMPLE_SET_FIELD(mmap2, u32, pid);
    __NON_SAMPLE_SET_FIELD(mmap2, u32, tid);
    __NON_SAMPLE_SET_FIELD(mmap2, u64_hex, start);
    __NON_SAMPLE_SET_FIELD(mmap2, string, filename);
)
#undef __NON_SAMPLE_SET_FIELD
#undef __FUNC_PROCESS_NON_SAMPLE

/* If dup < 0, add a prefix. Else, add _dupl_X suffix. */
static char *change_name(char *name, char *orig_name, int dup)
{
    char *new_name = NULL;
    size_t len;

    if (!name)
        name = orig_name;

    if (dup >= 10)
        goto out;
    /*
     * Add '_' prefix to potential keywork.  According to
     * Mathieu Desnoyers (https://lkml.org/lkml/2015/1/23/652),
     * futher CTF spec updating may require us to use '$'.
     */
    if (dup < 0)
        len = strlen(name) + sizeof("_");
    else
        len = strlen(orig_name) + sizeof("_dupl_X");

    new_name = malloc(len);
    if (!new_name)
        goto out;

    if (dup < 0)
        snprintf(new_name, len, "_%s", name);
    else
        snprintf(new_name, len, "%s_dupl_%d", orig_name, dup);

out:
    if (name != orig_name)
        free(name);
    return new_name;
}

static int event_class_add_field(struct bt_ctf_event_class *event_class,
        struct bt_ctf_field_type *type,
        struct format_field *field)
{
    struct bt_ctf_field_type *t = NULL;
    char *name;
    int dup = 1;
    int ret;

    /* alias was already assigned */
    if (field->alias != field->name)
        return bt_ctf_event_class_add_field(event_class, type,
                (char *)field->alias);

    name = field->name;

    /* If 'name' is a keywork, add prefix. */
    if (bt_ctf_validate_identifier(name))
        name = change_name(name, field->name, -1);

    if (!name) {
        pr_err("Failed to fix invalid identifier.");
        return -1;
    }
    while ((t = bt_ctf_event_class_get_field_by_name(event_class, name))) {
        bt_ctf_field_type_put(t);
        name = change_name(name, field->name, dup++);
        if (!name) {
            pr_err("Failed to create dup name for '%s'\n", field->name);
            return -1;
        }
    }

    ret = bt_ctf_event_class_add_field(event_class, type, name);
    if (!ret)
        field->alias = name;

    return ret;
}

static int add_tracepoint_fields_types(struct ctf_writer *cw,
                       struct format_field *fields,
                       struct bt_ctf_event_class *event_class)
{
    struct format_field *field;
    int ret;

    for (field = fields; field; field = field->next) {
        struct bt_ctf_field_type *type;
        unsigned long flags = field->flags;

        pr2("  field '%s'\n", field->name);

        type = get_tracepoint_field_type(cw, field);
        if (!type)
            return -1;

        /*
         * A string is an array of chars. For this we use the string
         * type and don't care that it is an array. What we don't
         * support is an array of strings.
         */
        if (flags & FIELD_IS_STRING)
            flags &= ~FIELD_IS_ARRAY;

        if (flags & FIELD_IS_ARRAY)
            type = bt_ctf_field_type_array_create(type, field->arraylen);

        ret = event_class_add_field(event_class, type, field);

        if (flags & FIELD_IS_ARRAY)
            bt_ctf_field_type_put(type);

        if (ret) {
            pr_err("Failed to add field '%s': %d\n",
                    field->name, ret);
            return -1;
        }
    }

    return 0;
}

static int add_tracepoint_types(struct ctf_writer *cw,
                struct perf_evsel *evsel,
                struct bt_ctf_event_class *class)
{
    struct format_field *common_fields = evsel->tp_format->format.common_fields;
    struct format_field *fields        = evsel->tp_format->format.fields;
    int ret;

    ret = add_tracepoint_fields_types(cw, common_fields, class);
    if (!ret)
        ret = add_tracepoint_fields_types(cw, fields, class);

    return ret;
}

static int add_bpf_output_types(struct ctf_writer *cw,
                struct bt_ctf_event_class *class)
{
    struct bt_ctf_field_type *len_type = cw->data.u32;
    struct bt_ctf_field_type *seq_base_type = cw->data.u32_hex;
    struct bt_ctf_field_type *seq_type;
    int ret;

    ret = bt_ctf_event_class_add_field(class, len_type, "raw_len");
    if (ret)
        return ret;

    seq_type = bt_ctf_field_type_sequence_create(seq_base_type, "raw_len");
    if (!seq_type)
        return -1;

    return bt_ctf_event_class_add_field(class, seq_type, "raw_data");
}

static int add_generic_types(struct ctf_writer *cw, struct perf_evsel *evsel,
                 struct bt_ctf_event_class *event_class)
{
    u64 type = evsel->attr.sample_type;

    /*
     * missing:
     *   PERF_SAMPLE_TIME         - not needed as we have it in
     *                              ctf event header
     *   PERF_SAMPLE_READ         - TODO
     *   PERF_SAMPLE_CALLCHAIN    - TODO
     *   PERF_SAMPLE_RAW          - tracepoint fields and BPF output
     *                              are handled separately
     *   PERF_SAMPLE_BRANCH_STACK - TODO
     *   PERF_SAMPLE_REGS_USER    - TODO
     *   PERF_SAMPLE_STACK_USER   - TODO
     */

#define ADD_FIELD(cl, t, n)                     \
    do {                                \
        pr2("  field '%s'\n", n);               \
        if (bt_ctf_event_class_add_field(cl, t, n)) {       \
            pr_err("Failed to add field '%s';\n", n);   \
            return -1;                  \
        }                           \
    } while (0)

    if (type & PERF_SAMPLE_IP)
        ADD_FIELD(event_class, cw->data.u64_hex, "perf_ip");

    if (type & PERF_SAMPLE_TID) {
        ADD_FIELD(event_class, cw->data.s32, "perf_tid");
        ADD_FIELD(event_class, cw->data.s32, "perf_pid");
    }

    if ((type & PERF_SAMPLE_ID) ||
        (type & PERF_SAMPLE_IDENTIFIER))
        ADD_FIELD(event_class, cw->data.u64, "perf_id");

    if (type & PERF_SAMPLE_STREAM_ID)
        ADD_FIELD(event_class, cw->data.u64, "perf_stream_id");

    if (type & PERF_SAMPLE_PERIOD)
        ADD_FIELD(event_class, cw->data.u64, "perf_period");

    if (type & PERF_SAMPLE_WEIGHT)
        ADD_FIELD(event_class, cw->data.u64, "perf_weight");

    if (type & PERF_SAMPLE_DATA_SRC)
        ADD_FIELD(event_class, cw->data.u64, "perf_data_src");

    if (type & PERF_SAMPLE_TRANSACTION)
        ADD_FIELD(event_class, cw->data.u64, "perf_transaction");

    if (type & PERF_SAMPLE_CALLCHAIN) {
        ADD_FIELD(event_class, cw->data.u32, "perf_callchain_size");
        ADD_FIELD(event_class,
            bt_ctf_field_type_sequence_create(
                cw->data.u64_hex, "perf_callchain_size"),
            "perf_callchain");
    }

#undef ADD_FIELD
    return 0;
}

static int add_event(struct ctf_writer *cw, struct perf_evsel *evsel)
{
    struct bt_ctf_event_class *event_class;
    struct evsel_priv *priv;
    const char *name = perf_evsel__name(evsel);
    int ret;

    pr("Adding event '%s' (type %d)\n", name, evsel->attr.type);

    event_class = bt_ctf_event_class_create(name);
    if (!event_class)
        return -1;

    ret = add_generic_types(cw, evsel, event_class);
    if (ret)
        goto err;

    if (evsel->attr.type == PERF_TYPE_TRACEPOINT) {
        ret = add_tracepoint_types(cw, evsel, event_class);
        if (ret)
            goto err;
    }

    if (perf_evsel__is_bpf_output(evsel)) {
        ret = add_bpf_output_types(cw, event_class);
        if (ret)
            goto err;
    }

    ret = bt_ctf_stream_class_add_event_class(cw->stream_class, event_class);
    if (ret) {
        pr("Failed to add event class into stream.\n");
        goto err;
    }

    priv = malloc(sizeof(*priv));
    if (!priv)
        goto err;

    priv->event_class = event_class;
    evsel->priv       = priv;
    return 0;

err:
    bt_ctf_event_class_put(event_class);
    pr_err("Failed to add event '%s'.\n", name);
    return -1;
}

static int setup_events(struct ctf_writer *cw, struct perf_session *session)
{
    struct perf_evlist *evlist = session->evlist;
    struct perf_evsel *evsel;
    int ret;

    evlist__for_each_entry(evlist, evsel) {
        ret = add_event(cw, evsel);
        if (ret)
            return ret;
    }
    return 0;
}

#define __NON_SAMPLE_ADD_FIELD(t, n)                        \
    do {                            \
        pr2("  field '%s'\n", #n);          \
        if (bt_ctf_event_class_add_field(event_class, cw->data.t, #n)) {\
            pr_err("Failed to add field '%s';\n", #n);\
            return -1;              \
        }                       \
    } while(0)

#define __FUNC_ADD_NON_SAMPLE_EVENT_CLASS(_name, body)      \
static int add_##_name##_event(struct ctf_writer *cw)       \
{                               \
    struct bt_ctf_event_class *event_class;         \
    int ret;                        \
                                \
    pr("Adding "#_name" event\n");              \
    event_class = bt_ctf_event_class_create("perf_" #_name);\
    if (!event_class)                   \
        return -1;                  \
    body                            \
                                \
    ret = bt_ctf_stream_class_add_event_class(cw->stream_class, event_class);\
    if (ret) {                      \
        pr("Failed to add event class '"#_name"' into stream.\n");\
        return ret;                 \
    }                           \
                                \
    cw->_name##_class = event_class;            \
    bt_ctf_event_class_put(event_class);            \
    return 0;                       \
}

__FUNC_ADD_NON_SAMPLE_EVENT_CLASS(comm,
    __NON_SAMPLE_ADD_FIELD(u32, pid);
    __NON_SAMPLE_ADD_FIELD(u32, tid);
    __NON_SAMPLE_ADD_FIELD(string, comm);
)

__FUNC_ADD_NON_SAMPLE_EVENT_CLASS(fork,
    __NON_SAMPLE_ADD_FIELD(u32, pid);
    __NON_SAMPLE_ADD_FIELD(u32, ppid);
    __NON_SAMPLE_ADD_FIELD(u32, tid);
    __NON_SAMPLE_ADD_FIELD(u32, ptid);
    __NON_SAMPLE_ADD_FIELD(u64, time);
)

__FUNC_ADD_NON_SAMPLE_EVENT_CLASS(exit,
    __NON_SAMPLE_ADD_FIELD(u32, pid);
    __NON_SAMPLE_ADD_FIELD(u32, ppid);
    __NON_SAMPLE_ADD_FIELD(u32, tid);
    __NON_SAMPLE_ADD_FIELD(u32, ptid);
    __NON_SAMPLE_ADD_FIELD(u64, time);
)

__FUNC_ADD_NON_SAMPLE_EVENT_CLASS(mmap,
    __NON_SAMPLE_ADD_FIELD(u32, pid);
    __NON_SAMPLE_ADD_FIELD(u32, tid);
    __NON_SAMPLE_ADD_FIELD(u64_hex, start);
    __NON_SAMPLE_ADD_FIELD(string, filename);
)

__FUNC_ADD_NON_SAMPLE_EVENT_CLASS(mmap2,
    __NON_SAMPLE_ADD_FIELD(u32, pid);
    __NON_SAMPLE_ADD_FIELD(u32, tid);
    __NON_SAMPLE_ADD_FIELD(u64_hex, start);
    __NON_SAMPLE_ADD_FIELD(string, filename);
)
#undef __NON_SAMPLE_ADD_FIELD
#undef __FUNC_ADD_NON_SAMPLE_EVENT_CLASS

static int setup_non_sample_events(struct ctf_writer *cw,
                   struct perf_session *session __maybe_unused)
{
    int ret;

    ret = add_comm_event(cw);
    if (ret)
        return ret;
    ret = add_exit_event(cw);
    if (ret)
        return ret;
    ret = add_fork_event(cw);
    if (ret)
        return ret;
    ret = add_mmap_event(cw);
    if (ret)
        return ret;
    ret = add_mmap2_event(cw);
    if (ret)
        return ret;
    return 0;
}

static void cleanup_events(struct perf_session *session)
{
    struct perf_evlist *evlist = session->evlist;
    struct perf_evsel *evsel;

    evlist__for_each_entry(evlist, evsel) {
        struct evsel_priv *priv;

        priv = evsel->priv;
        bt_ctf_event_class_put(priv->event_class);
        zfree(&evsel->priv);
    }

    perf_evlist__delete(evlist);
    session->evlist = NULL;
}

static int setup_streams(struct ctf_writer *cw, struct perf_session *session)
{
    struct ctf_stream **stream;
    struct perf_header *ph = &session->header;
    int ncpus;

    /*
     * Try to get the number of cpus used in the data file,
     * if not present fallback to the MAX_CPUS.
     */
    ncpus = ph->env.nr_cpus_avail ?: MAX_CPUS;

    stream = zalloc(sizeof(*stream) * ncpus);
    if (!stream) {
        pr_err("Failed to allocate streams.\n");
        return -ENOMEM;
    }

    cw->stream     = stream;
    cw->stream_cnt = ncpus;
    return 0;
}

static void free_streams(struct ctf_writer *cw)
{
    int cpu;

    for (cpu = 0; cpu < cw->stream_cnt; cpu++)
        ctf_stream__delete(cw->stream[cpu]);

    free(cw->stream);
}

static int ctf_writer__setup_env(struct ctf_writer *cw,
                 struct perf_session *session)
{
    struct perf_header *header = &session->header;
    struct bt_ctf_writer *writer = cw->writer;

#define ADD(__n, __v)                           \
do {                                    \
    if (bt_ctf_writer_add_environment_field(writer, __n, __v))  \
        return -1;                      \
} while (0)

    ADD("host",    header->env.hostname);
    ADD("sysname", "Linux");
    ADD("release", header->env.os_release);
    ADD("version", header->env.version);
    ADD("machine", header->env.arch);
    ADD("domain", "kernel");
    ADD("tracer_name", "perf");

#undef ADD
    return 0;
}

static int ctf_writer__setup_clock(struct ctf_writer *cw)
{
    struct bt_ctf_clock *clock = cw->clock;

    bt_ctf_clock_set_description(clock, "perf clock");

#define SET(__n, __v)               \
do {                        \
    if (bt_ctf_clock_set_##__n(clock, __v)) \
        return -1;          \
} while (0)

    SET(frequency,   1000000000);
    SET(offset_s,    0);
    SET(offset,      0);
    SET(precision,   10);
    SET(is_absolute, 0);

#undef SET
    return 0;
}

static struct bt_ctf_field_type *create_int_type(int size, bool sign, bool hex)
{
    struct bt_ctf_field_type *type;

    type = bt_ctf_field_type_integer_create(size);
    if (!type)
        return NULL;

    if (sign &&
        bt_ctf_field_type_integer_set_signed(type, 1))
        goto err;

    if (hex &&
        bt_ctf_field_type_integer_set_base(type, BT_CTF_INTEGER_BASE_HEXADECIMAL))
        goto err;

#if __BYTE_ORDER == __BIG_ENDIAN
    bt_ctf_field_type_set_byte_order(type, BT_CTF_BYTE_ORDER_BIG_ENDIAN);
#else
    bt_ctf_field_type_set_byte_order(type, BT_CTF_BYTE_ORDER_LITTLE_ENDIAN);
#endif

    pr2("Created type: INTEGER %d-bit %ssigned %s\n",
        size, sign ? "un" : "", hex ? "hex" : "");
    return type;

err:
    bt_ctf_field_type_put(type);
    return NULL;
}

static void ctf_writer__cleanup_data(struct ctf_writer *cw)
{
    unsigned int i;

    for (i = 0; i < ARRAY_SIZE(cw->data.array); i++)
        bt_ctf_field_type_put(cw->data.array[i]);
}

static int ctf_writer__init_data(struct ctf_writer *cw)
{
#define CREATE_INT_TYPE(type, size, sign, hex)      \
do {                            \
    (type) = create_int_type(size, sign, hex);  \
    if (!(type))                    \
        goto err;               \
} while (0)

    CREATE_INT_TYPE(cw->data.s64, 64, true,  false);
    CREATE_INT_TYPE(cw->data.u64, 64, false, false);
    CREATE_INT_TYPE(cw->data.s32, 32, true,  false);
    CREATE_INT_TYPE(cw->data.u32, 32, false, false);
    CREATE_INT_TYPE(cw->data.u32_hex, 32, false, true);
    CREATE_INT_TYPE(cw->data.u64_hex, 64, false, true);

    cw->data.string  = bt_ctf_field_type_string_create();
    if (cw->data.string)
        return 0;

err:
    ctf_writer__cleanup_data(cw);
    pr_err("Failed to create data types.\n");
    return -1;
}

static void ctf_writer__cleanup(struct ctf_writer *cw)
{
    ctf_writer__cleanup_data(cw);

    bt_ctf_clock_put(cw->clock);
    free_streams(cw);
    bt_ctf_stream_class_put(cw->stream_class);
    bt_ctf_writer_put(cw->writer);

    /* and NULL all the pointers */
    memset(cw, 0, sizeof(*cw));
}

static int ctf_writer__init(struct ctf_writer *cw, const char *path)
{
    struct bt_ctf_writer        *writer;
    struct bt_ctf_stream_class  *stream_class;
    struct bt_ctf_clock     *clock;
    struct bt_ctf_field_type    *pkt_ctx_type;
    int             ret;

    /* CTF writer */
    writer = bt_ctf_writer_create(path);
    if (!writer)
        goto err;

    cw->writer = writer;

    /* CTF clock */
    clock = bt_ctf_clock_create("perf_clock");
    if (!clock) {
        pr("Failed to create CTF clock.\n");
        goto err_cleanup;
    }

    cw->clock = clock;

    if (ctf_writer__setup_clock(cw)) {
        pr("Failed to setup CTF clock.\n");
        goto err_cleanup;
    }

    /* CTF stream class */
    stream_class = bt_ctf_stream_class_create("perf_stream");
    if (!stream_class) {
        pr("Failed to create CTF stream class.\n");
        goto err_cleanup;
    }

    cw->stream_class = stream_class;

    /* CTF clock stream setup */
    if (bt_ctf_stream_class_set_clock(stream_class, clock)) {
        pr("Failed to assign CTF clock to stream class.\n");
        goto err_cleanup;
    }

    if (ctf_writer__init_data(cw))
        goto err_cleanup;

    /* Add cpu_id for packet context */
    pkt_ctx_type = bt_ctf_stream_class_get_packet_context_type(stream_class);
    if (!pkt_ctx_type)
        goto err_cleanup;

    ret = bt_ctf_field_type_structure_add_field(pkt_ctx_type, cw->data.u32, "cpu_id");
    bt_ctf_field_type_put(pkt_ctx_type);
    if (ret)
        goto err_cleanup;

    /* CTF clock writer setup */
    if (bt_ctf_writer_add_clock(writer, clock)) {
        pr("Failed to assign CTF clock to writer.\n");
        goto err_cleanup;
    }

    return 0;

err_cleanup:
    ctf_writer__cleanup(cw);
err:
    pr_err("Failed to setup CTF writer.\n");
    return -1;
}

static int ctf_writer__flush_streams(struct ctf_writer *cw)
{
    int cpu, ret = 0;

    for (cpu = 0; cpu < cw->stream_cnt && !ret; cpu++)
        ret = ctf_stream__flush(cw->stream[cpu]);

    return ret;
}

static int convert__config(const char *var, const char *value, void *cb)
{
    struct convert *c = cb;

    if (!strcmp(var, "convert.queue-size"))
        return perf_config_u64(&c->queue_size, var, value);

    return 0;
}

int bt_convert__perf2ctf(const char *input, const char *path,
             struct perf_data_convert_opts *opts)
{
    struct perf_session *session;
    struct perf_data data = {
        .file.path = input,
        .mode      = PERF_DATA_MODE_READ,
        .force     = opts->force,
    };
    struct convert c = {
        .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,
            .lost            = perf_event__process_lost,
            .tracing_data    = perf_event__process_tracing_data,
            .build_id        = perf_event__process_build_id,
            .namespaces      = perf_event__process_namespaces,
            .ordered_events  = true,
            .ordering_requires_timestamps = true,
        },
    };
    struct ctf_writer *cw = &c.writer;
    int err;

    if (opts->all) {
        c.tool.comm = process_comm_event;
        c.tool.exit = process_exit_event;
        c.tool.fork = process_fork_event;
        c.tool.mmap = process_mmap_event;
        c.tool.mmap2 = process_mmap2_event;
    }

    err = perf_config(convert__config, &c);
    if (err)
        return err;

    /* CTF writer */
    if (ctf_writer__init(cw, path))
        return -1;

    err = -1;
    /* perf.data session */
    session = perf_session__new(&data, 0, &c.tool);
    if (!session)
        goto free_writer;

    if (c.queue_size) {
        ordered_events__set_alloc_size(&session->ordered_events,
                           c.queue_size);
    }

    /* CTF writer env/clock setup  */
    if (ctf_writer__setup_env(cw, session))
        goto free_session;

    /* CTF events setup */
    if (setup_events(cw, session))
        goto free_session;

    if (opts->all && setup_non_sample_events(cw, session))
        goto free_session;

    if (setup_streams(cw, session))
        goto free_session;

    err = perf_session__process_events(session);
    if (!err)
        err = ctf_writer__flush_streams(cw);
    else
        pr_err("Error during conversion.\n");

    fprintf(stderr,
        "[ perf data convert: Converted '%s' into CTF data '%s' ]\n",
        data.file.path, path);

    fprintf(stderr,
        "[ perf data convert: Converted and wrote %.3f MB (%" PRIu64 " samples",
        (double) c.events_size / 1024.0 / 1024.0,
        c.events_count);

    if (!c.non_sample_count)
        fprintf(stderr, ") ]\n");
    else
        fprintf(stderr, ", %" PRIu64 " non-samples) ]\n", c.non_sample_count);

    cleanup_events(session);
    perf_session__delete(session);
    ctf_writer__cleanup(cw);

    return err;

free_session:
    perf_session__delete(session);
free_writer:
    ctf_writer__cleanup(cw);
    pr_err("Error during conversion setup.\n");
    return err;
}