+++ /dev/null
-/*
- * Babeltrace - CTF notification iterator
- * ¯¯¯¯¯ ¯¯¯¯
- * Copyright (c) 2015-2016 EfficiOS Inc. and Linux Foundation
- * Copyright (c) 2015-2016 Philippe Proulx <pproulx@efficios.com>
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-#include <stdint.h>
-#include <inttypes.h>
-#include <stdio.h>
-#include <stddef.h>
-#include <stdbool.h>
-#include <assert.h>
-#include <string.h>
-#include <babeltrace/ctf-ir/field-types.h>
-#include <babeltrace/ctf-ir/field-path.h>
-#include <babeltrace/ctf-ir/fields.h>
-#include <babeltrace/ctf-ir/stream-class.h>
-#include <babeltrace/ctf-ir/packet.h>
-#include <babeltrace/ctf-ir/stream.h>
-#include <babeltrace/ctf-ir/clock.h>
-#include <babeltrace/ctf-ir/event-class.h>
-#include <babeltrace/ref.h>
-#include <glib.h>
-
-#define PRINT_ERR_STREAM notit->err_stream
-#define PRINT_PREFIX "ctf-notif-iter"
-#include "print.h"
-
-#include "ctf-notif-iter.h"
-#include "../ctf-btr/ctf-btr.h"
-
-#define BYTES_TO_BITS(x) ((x) * 8)
-
-struct bt_ctf_notif_iter;
-
-/* A visit stack entry */
-struct stack_entry {
- /*
- * Current base field, one of:
- *
- * * string
- * * structure
- * * array
- * * sequence
- * * variant
- *
- * Field is owned by this.
- */
- struct bt_ctf_field *base;
-
- /* index of next field to set */
- size_t index;
-};
-
-/* Visit stack */
-struct stack {
- /* Entries (struct stack_entry *) (top is last element) */
- GPtrArray *entries;
-
- /* Link to owner */
- struct bt_ctf_notif_iter *notit;
-};
-
-/* State */
-enum state {
- STATE_INIT,
- STATE_DSCOPE_TRACE_PACKET_HEADER_BEGIN,
- STATE_DSCOPE_TRACE_PACKET_HEADER_CONTINUE,
- STATE_AFTER_TRACE_PACKET_HEADER,
- STATE_DSCOPE_STREAM_PACKET_CONTEXT_BEGIN,
- STATE_DSCOPE_STREAM_PACKET_CONTEXT_CONTINUE,
- STATE_AFTER_STREAM_PACKET_CONTEXT,
- STATE_EMIT_NOTIF_NEW_PACKET,
- STATE_DSCOPE_STREAM_EVENT_HEADER_BEGIN,
- STATE_DSCOPE_STREAM_EVENT_HEADER_CONTINUE,
- STATE_AFTER_STREAM_EVENT_HEADER,
- STATE_DSCOPE_STREAM_EVENT_CONTEXT_BEGIN,
- STATE_DSCOPE_STREAM_EVENT_CONTEXT_CONTINUE,
- STATE_DSCOPE_EVENT_CONTEXT_BEGIN,
- STATE_DSCOPE_EVENT_CONTEXT_CONTINUE,
- STATE_DSCOPE_EVENT_PAYLOAD_BEGIN,
- STATE_DSCOPE_EVENT_PAYLOAD_CONTINUE,
- STATE_EMIT_NOTIF_EVENT,
- STATE_EMIT_NOTIF_END_OF_PACKET,
- STATE_SKIP_PACKET_PADDING,
-};
-
-/* CTF notification iterator */
-struct bt_ctf_notif_iter {
- /* Visit stack */
- struct stack *stack;
-
- /* Error stream (may be NULL) */
- FILE *err_stream;
-
- /*
- * Current dynamic scope field pointer.
- *
- * This is set when a dynamic scope field is first created by
- * btr_compound_begin_cb(). It points to one of the fields in
- * dscopes below.
- */
- struct bt_ctf_field **cur_dscope_field;
-
- /* Trace and classes (owned by this) */
- struct {
- struct bt_ctf_trace *trace;
- struct bt_ctf_stream_class *stream_class;
- struct bt_ctf_event_class *event_class;
- } meta;
-
- /* Current packet (NULL if not created yet) */
- struct bt_ctf_packet *packet;
-
- /* Database of current dynamic scopes (owned by this) */
- struct {
- struct bt_ctf_field *trace_packet_header;
- struct bt_ctf_field *stream_packet_context;
- struct bt_ctf_field *stream_event_header;
- struct bt_ctf_field *stream_event_context;
- struct bt_ctf_field *event_context;
- struct bt_ctf_field *event_payload;
- } dscopes;
-
- /* Current state */
- enum state state;
-
- /* User buffer stuff */
- struct {
- /* Last address provided by medium */
- const uint8_t *addr;
-
- /* Buffer size provided by medium (bytes) */
- size_t sz;
-
- /* Offset within whole packet of addr (bits) */
- size_t packet_offset;
-
- /* Current position from addr (bits) */
- size_t at;
- } buf;
-
- /* Binary type reader */
- struct bt_ctf_btr *btr;
-
- /* Medium stuff */
- struct {
- struct bt_ctf_notif_iter_medium_ops medops;
- size_t max_request_sz;
- void *data;
- } medium;
-
- /* Current packet size (bits) (-1 if unknown) */
- size_t cur_packet_size;
-
- /* Current content size (bits) (-1 if unknown) */
- size_t cur_content_size;
-};
-
-static
-void stack_entry_free_func(gpointer data)
-{
- struct stack_entry *entry = data;
-
- bt_put(entry->base);
- g_free(entry);
-}
-
-static
-struct stack *stack_new(struct bt_ctf_notif_iter *notit)
-{
- struct stack *stack = NULL;
-
- stack = g_new0(struct stack, 1);
- if (!stack) {
- goto error;
- }
-
- stack->entries = g_ptr_array_new_with_free_func(stack_entry_free_func);
- if (!stack->entries) {
- goto error;
- }
-
- stack->notit = notit;
-
- return stack;
-
-error:
- g_free(stack);
-
- return NULL;
-}
-
-static
-void stack_destroy(struct stack *stack)
-{
- assert(stack);
- g_ptr_array_free(stack->entries, TRUE);
- g_free(stack);
-}
-
-static
-int stack_push(struct stack *stack, struct bt_ctf_field *base)
-{
- int ret = 0;
- struct stack_entry *entry;
- struct bt_ctf_notif_iter *notit;
-
- assert(stack);
- assert(base);
- notit = stack->notit;
- entry = g_new0(struct stack_entry, 1);
- if (!entry) {
- PERR("Cannot create new stack entry\n");
- ret = -1;
- goto end;
- }
-
- entry->base = bt_get(base);
- g_ptr_array_add(stack->entries, entry);
-
-end:
- return ret;
-}
-
-static inline
-unsigned int stack_size(struct stack *stack)
-{
- assert(stack);
-
- return stack->entries->len;
-}
-
-static
-void stack_pop(struct stack *stack)
-{
- assert(stack);
- assert(stack_size(stack));
- g_ptr_array_remove_index(stack->entries, stack->entries->len - 1);
-}
-
-static inline
-struct stack_entry *stack_top(struct stack *stack)
-{
- assert(stack);
- assert(stack_size(stack));
-
- return g_ptr_array_index(stack->entries, stack->entries->len - 1);
-}
-
-static inline
-bool stack_empty(struct stack *stack)
-{
- return stack_size(stack) == 0;
-}
-
-static
-void stack_clear(struct stack *stack)
-{
- assert(stack);
-
- if (!stack_empty(stack)) {
- g_ptr_array_remove_range(stack->entries, 0, stack_size(stack));
- }
-
- assert(stack_empty(stack));
-}
-
-static inline
-enum bt_ctf_notif_iter_status notif_iter_status_from_m_status(
- enum bt_ctf_notif_iter_medium_status m_status)
-{
- return m_status;
-}
-
-static inline
-size_t buf_size_bits(struct bt_ctf_notif_iter *notit)
-{
- return BYTES_TO_BITS(notit->buf.sz);
-}
-
-static inline
-size_t buf_available_bits(struct bt_ctf_notif_iter *notit)
-{
- return buf_size_bits(notit) - notit->buf.at;
-}
-
-static inline
-size_t packet_at(struct bt_ctf_notif_iter *notit)
-{
- return notit->buf.packet_offset + notit->buf.at;
-}
-
-static inline
-size_t remaining_content_bits(struct bt_ctf_notif_iter *notit)
-{
- if (notit->cur_content_size == -1) {
- return -1;
- }
-
- return notit->cur_content_size - packet_at(notit);
-}
-
-static inline
-size_t remaining_packet_bits(struct bt_ctf_notif_iter *notit)
-{
- if (notit->cur_packet_size == -1) {
- return -1;
- }
-
- return notit->cur_packet_size - packet_at(notit);
-}
-
-static inline
-void buf_consume_bits(struct bt_ctf_notif_iter *notit, size_t incr)
-{
- notit->buf.at += incr;
-}
-
-static inline
-bool buf_has_enough_bits(struct bt_ctf_notif_iter *notit, size_t sz)
-{
- return buf_available_bits(notit) >= sz;
-}
-
-static
-enum bt_ctf_notif_iter_status request_medium_bytes(struct bt_ctf_notif_iter *notit)
-{
- uint8_t *buffer_addr;
- size_t buffer_sz;
- enum bt_ctf_notif_iter_medium_status m_status;
-
- m_status = notit->medium.medops.request_bytes(
- notit->medium.max_request_sz, &buffer_addr,
- &buffer_sz, notit->medium.data);
- if (m_status == BT_CTF_NOTIF_ITER_MEDIUM_STATUS_OK) {
- assert(buffer_sz != 0);
-
- /* New packet offset is old one + old size (in bits) */
- notit->buf.packet_offset += buf_size_bits(notit);
-
- /* Restart at the beginning of the new medium buffer */
- notit->buf.at = 0;
-
- /* New medium buffer size */
- notit->buf.sz = buffer_sz;
-
- /* New medium buffer address */
- notit->buf.addr = buffer_addr;
- }
-
- return notif_iter_status_from_m_status(m_status);
-}
-
-static inline
-enum bt_ctf_notif_iter_status buf_ensure_available_bits(
- struct bt_ctf_notif_iter *notit)
-{
- enum bt_ctf_notif_iter_status status = BT_CTF_NOTIF_ITER_STATUS_OK;
-
- if (buf_available_bits(notit) == 0) {
- /*
- * This _cannot_ return BT_CTF_NOTIF_ITER_STATUS_OK
- * _and_ no bits.
- */
- status = request_medium_bytes(notit);
- }
-
- return status;
-}
-
-static
-enum bt_ctf_notif_iter_status read_dscope_begin_state(
- struct bt_ctf_notif_iter *notit,
- struct bt_ctf_field_type *dscope_field_type,
- enum state done_state, enum state continue_state,
- struct bt_ctf_field **dscope_field)
-{
- enum bt_ctf_notif_iter_status status = BT_CTF_NOTIF_ITER_STATUS_OK;
- enum bt_ctf_btr_status btr_status;
- size_t consumed_bits;
-
- status = buf_ensure_available_bits(notit);
- if (status != BT_CTF_NOTIF_ITER_STATUS_OK) {
- goto end;
- }
-
- bt_put(*dscope_field);
- notit->cur_dscope_field = dscope_field;
- consumed_bits = bt_ctf_btr_start(notit->btr, dscope_field_type,
- notit->buf.addr, notit->buf.at, packet_at(notit),
- notit->buf.sz, &btr_status);
-
- switch (btr_status) {
- case BT_CTF_BTR_STATUS_OK:
- /* type was read completely */
- notit->state = done_state;
- break;
- case BT_CTF_BTR_STATUS_EOF:
- notit->state = continue_state;
- break;
- default:
- PERR("Binary type reader failed to start\n");
- status = BT_CTF_NOTIF_ITER_STATUS_ERROR;
- goto end;
- }
-
- /* Consume bits now since we know we're not in an error state */
- buf_consume_bits(notit, consumed_bits);
-
-end:
- return status;
-}
-
-static
-enum bt_ctf_notif_iter_status read_dscope_continue_state(
- struct bt_ctf_notif_iter *notit, enum state done_state)
-{
- enum bt_ctf_notif_iter_status status = BT_CTF_NOTIF_ITER_STATUS_OK;
- enum bt_ctf_btr_status btr_status;
- size_t consumed_bits;
-
- status = buf_ensure_available_bits(notit);
- if (status != BT_CTF_NOTIF_ITER_STATUS_OK) {
- goto end;
- }
-
- consumed_bits = bt_ctf_btr_continue(notit->btr, notit->buf.addr,
- notit->buf.sz, &btr_status);
-
- switch (btr_status) {
- case BT_CTF_BTR_STATUS_OK:
- /* Type was read completely */
- notit->state = done_state;
- break;
- case BT_CTF_BTR_STATUS_EOF:
- /* Stay in this continue state */
- break;
- default:
- PERR("Binary type reader failed to continue\n");
- status = BT_CTF_NOTIF_ITER_STATUS_ERROR;
- goto end;
- }
-
- /* Consume bits now since we know we're not in an error state */
- buf_consume_bits(notit, consumed_bits);
-
-end:
- return status;
-}
-
-static
-void put_event_dscopes(struct bt_ctf_notif_iter *notit)
-{
- BT_PUT(notit->dscopes.stream_event_header);
- BT_PUT(notit->dscopes.stream_event_context);
- BT_PUT(notit->dscopes.event_context);
- BT_PUT(notit->dscopes.event_payload);
-}
-
-static
-void put_all_dscopes(struct bt_ctf_notif_iter *notit)
-{
- BT_PUT(notit->dscopes.trace_packet_header);
- BT_PUT(notit->dscopes.stream_packet_context);
- put_event_dscopes(notit);
-}
-
-static
-enum bt_ctf_notif_iter_status read_packet_header_begin_state(
- struct bt_ctf_notif_iter *notit)
-{
- enum bt_ctf_notif_iter_status status = BT_CTF_NOTIF_ITER_STATUS_OK;
- struct bt_ctf_field_type *packet_header_type;
-
- /* Reset all dynamic scopes since we're reading a new packet */
- put_all_dscopes(notit);
- BT_PUT(notit->packet);
- BT_PUT(notit->meta.stream_class);
- BT_PUT(notit->meta.event_class);
-
- /* Packet header type is common to the whole trace */
- packet_header_type = bt_ctf_trace_get_packet_header_type(
- notit->meta.trace);
- if (!packet_header_type) {
- PERR("Failed to retrieve trace's packet header type\n");
- status = BT_CTF_NOTIF_ITER_STATUS_ERROR;
- goto end;
- }
-
- status = read_dscope_begin_state(notit, packet_header_type,
- STATE_AFTER_TRACE_PACKET_HEADER,
- STATE_DSCOPE_TRACE_PACKET_HEADER_CONTINUE,
- ¬it->dscopes.trace_packet_header);
-
-end:
- BT_PUT(packet_header_type);
-
- return status;
-}
-
-static
-enum bt_ctf_notif_iter_status read_packet_header_continue_state(
- struct bt_ctf_notif_iter *notit)
-{
- return read_dscope_continue_state(notit,
- STATE_AFTER_TRACE_PACKET_HEADER);
-}
-
-static inline
-bool is_struct_type(struct bt_ctf_field_type *field_type)
-{
- return bt_ctf_field_type_get_type_id(field_type) == BT_CTF_TYPE_ID_STRUCT;
-}
-
-static inline
-bool is_variant_type(struct bt_ctf_field_type *field_type)
-{
- return bt_ctf_field_type_get_type_id(field_type) == BT_CTF_TYPE_ID_VARIANT;
-}
-
-static inline
-enum bt_ctf_notif_iter_status set_current_stream_class(struct bt_ctf_notif_iter *notit)
-{
- enum bt_ctf_notif_iter_status status = BT_CTF_NOTIF_ITER_STATUS_OK;
- struct bt_ctf_field_type *packet_header_type;
- struct bt_ctf_field_type *stream_id_field_type = NULL;
- uint64_t stream_id;
-
- /* Is there any "stream_id" field in the packet header? */
- packet_header_type = bt_ctf_trace_get_packet_header_type(
- notit->meta.trace);
- if (!packet_header_type) {
- PERR("Failed to retrieve trace's packet header type\n");
- status = BT_CTF_NOTIF_ITER_STATUS_ERROR;
- goto end;
- }
-
- assert(is_struct_type(packet_header_type));
-
- // TODO: optimalize!
- stream_id_field_type =
- bt_ctf_field_type_structure_get_field_type_by_name(
- packet_header_type, "stream_id");
- if (stream_id_field_type) {
- /* Find appropriate stream class using current stream ID */
- struct bt_ctf_field *stream_id_field = NULL;
- int ret;
-
- assert(notit->dscopes.trace_packet_header);
-
- // TODO: optimalize!
- stream_id_field = bt_ctf_field_structure_get_field(
- notit->dscopes.trace_packet_header, "stream_id");
- assert(stream_id_field);
- ret = bt_ctf_field_unsigned_integer_get_value(
- stream_id_field, &stream_id);
- assert(!ret);
- BT_PUT(stream_id_field);
- } else {
- /* Only one stream: pick the first stream class */
- assert(bt_ctf_trace_get_stream_class_count(
- notit->meta.trace) == 1);
- stream_id = 0;
- }
-
- BT_PUT(notit->meta.stream_class);
-
- // TODO: get by ID
- notit->meta.stream_class = bt_ctf_trace_get_stream_class(
- notit->meta.trace, stream_id);
- if (!notit->meta.stream_class) {
- PERR("Cannot find stream class with ID %" PRIu64 "\n",
- stream_id);
- status = BT_CTF_NOTIF_ITER_STATUS_ERROR;
- goto end;
- }
-
-end:
- BT_PUT(packet_header_type);
- BT_PUT(stream_id_field_type);
-
- return status;
-}
-
-static
-enum bt_ctf_notif_iter_status after_packet_header_state(
- struct bt_ctf_notif_iter *notit)
-{
- enum bt_ctf_notif_iter_status status;
-
- status = set_current_stream_class(notit);
- if (status == BT_CTF_NOTIF_ITER_STATUS_OK) {
- notit->state = STATE_DSCOPE_STREAM_PACKET_CONTEXT_BEGIN;
- }
-
- return status;
-}
-
-static
-enum bt_ctf_notif_iter_status read_packet_context_begin_state(
- struct bt_ctf_notif_iter *notit)
-{
- enum bt_ctf_notif_iter_status status = BT_CTF_NOTIF_ITER_STATUS_OK;
- struct bt_ctf_field_type *packet_context_type;
-
- assert(notit->meta.stream_class);
- packet_context_type = bt_ctf_stream_class_get_packet_context_type(
- notit->meta.stream_class);
- if (!packet_context_type) {
- PERR("Failed to retrieve stream class's packet context\n");
- status = BT_CTF_NOTIF_ITER_STATUS_ERROR;
- goto end;
- }
-
- status = read_dscope_begin_state(notit, packet_context_type,
- STATE_AFTER_STREAM_PACKET_CONTEXT,
- STATE_DSCOPE_STREAM_PACKET_CONTEXT_CONTINUE,
- ¬it->dscopes.stream_packet_context);
-
-end:
- BT_PUT(packet_context_type);
-
- return status;
-}
-
-static
-enum bt_ctf_notif_iter_status read_packet_context_continue_state(
- struct bt_ctf_notif_iter *notit)
-{
- return read_dscope_continue_state(notit,
- STATE_AFTER_STREAM_PACKET_CONTEXT);
-}
-
-static inline
-enum bt_ctf_notif_iter_status set_current_packet_content_sizes(
- struct bt_ctf_notif_iter *notit)
-{
- enum bt_ctf_notif_iter_status status = BT_CTF_NOTIF_ITER_STATUS_OK;
- struct bt_ctf_field *packet_size_field = NULL;
- struct bt_ctf_field *content_size_field = NULL;
- uint64_t content_size = -1, packet_size = -1;
-
- assert(notit->dscopes.stream_packet_context);
-
- // TODO: optimalize!
- packet_size_field = bt_ctf_field_structure_get_field(
- notit->dscopes.stream_packet_context, "packet_size");
- content_size_field = bt_ctf_field_structure_get_field(
- notit->dscopes.stream_packet_context, "content_size");
- if (packet_size_field) {
- int ret = bt_ctf_field_unsigned_integer_get_value(
- packet_size_field, &packet_size);
- assert(!ret);
-
- if (packet_size == 0) {
- PERR("Decoded packet size is 0\n");
- status = BT_CTF_NOTIF_ITER_STATUS_ERROR;
- goto end;
- } else if ((packet_size % 8) != 0) {
- PERR("Decoded packet size is not a multiple of 8\n");
- status = BT_CTF_NOTIF_ITER_STATUS_ERROR;
- goto end;
- }
- }
- if (content_size_field) {
- int ret = bt_ctf_field_unsigned_integer_get_value(
- content_size_field, &content_size);
- assert(!ret);
- } else {
- content_size = packet_size;
- }
-
- notit->cur_packet_size = packet_size;
- notit->cur_content_size = content_size;
-
-end:
- BT_PUT(packet_size_field);
- BT_PUT(content_size_field);
-
- return status;
-}
-
-static
-enum bt_ctf_notif_iter_status after_packet_context_state(
- struct bt_ctf_notif_iter *notit)
-{
- enum bt_ctf_notif_iter_status status;
-
- status = set_current_packet_content_sizes(notit);
- if (status == BT_CTF_NOTIF_ITER_STATUS_OK) {
- notit->state = STATE_EMIT_NOTIF_NEW_PACKET;
- }
-
- return status;
-}
-
-static
-enum bt_ctf_notif_iter_status read_event_header_begin_state(
- struct bt_ctf_notif_iter *notit)
-{
- enum bt_ctf_notif_iter_status status = BT_CTF_NOTIF_ITER_STATUS_OK;
- struct bt_ctf_field_type *event_header_type = NULL;
-
- /* Check if we have some content left */
- if (notit->cur_content_size >= 0) {
- if (packet_at(notit) == notit->cur_content_size) {
- /* No more events! */
- notit->state = STATE_EMIT_NOTIF_END_OF_PACKET;
- goto end;
- } else if (packet_at(notit) > notit->cur_content_size) {
- /* That's not supposed to happen */
- PERR("Cursor passed packet's content size:\n");
- PERR(" Decoded content size: %zu\n",
- notit->cur_content_size);
- PERR(" Cursor position: %zu\n", packet_at(notit));
- status = BT_CTF_NOTIF_ITER_STATUS_ERROR;
- goto end;
- }
- }
-
- event_header_type = bt_ctf_stream_class_get_event_header_type(
- notit->meta.stream_class);
- if (!event_header_type) {
- PERR("Failed to retrieve stream class's event header type\n");
- status = BT_CTF_NOTIF_ITER_STATUS_ERROR;
- goto end;
- }
-
- put_event_dscopes(notit);
- status = read_dscope_begin_state(notit, event_header_type,
- STATE_AFTER_STREAM_EVENT_HEADER,
- STATE_DSCOPE_STREAM_EVENT_HEADER_CONTINUE,
- ¬it->dscopes.stream_event_header);
-
-end:
- BT_PUT(event_header_type);
-
- return status;
-}
-
-static
-enum bt_ctf_notif_iter_status read_event_header_continue_state(
- struct bt_ctf_notif_iter *notit)
-{
- return read_dscope_continue_state(notit,
- STATE_AFTER_STREAM_EVENT_HEADER);
-}
-
-static inline
-enum bt_ctf_notif_iter_status set_current_event_class(struct bt_ctf_notif_iter *notit)
-{
- /*
- * The assert() calls in this function are okay because it is
- * assumed here that all the metadata objects have been
- * validated for CTF correctness before decoding actual streams.
- */
-
- enum bt_ctf_notif_iter_status status = BT_CTF_NOTIF_ITER_STATUS_OK;
- struct bt_ctf_field_type *event_header_type;
- struct bt_ctf_field_type *id_field_type = NULL;
- struct bt_ctf_field_type *v_field_type = NULL;
- uint64_t event_id = -1ULL;
- int ret;
-
- event_header_type = bt_ctf_stream_class_get_event_header_type(
- notit->meta.stream_class);
- if (!event_header_type) {
- PERR("Failed to retrieve stream class's event header type\n");
- status = BT_CTF_NOTIF_ITER_STATUS_ERROR;
- goto end;
- }
-
- /* Is there any "id"/"v" field in the event header? */
- assert(is_struct_type(event_header_type));
- id_field_type = bt_ctf_field_type_structure_get_field_type_by_name(
- event_header_type, "id");
- v_field_type = bt_ctf_field_type_structure_get_field_type_by_name(
- event_header_type, "v");
- assert(notit->dscopes.stream_event_header);
- if (v_field_type) {
- /*
- * _ _____ _____
- * | | |_ _|_ _| __ __ _
- * | | | | | || '_ \ / _` |
- * | |___| | | || | | | (_| | S P E C I A L
- * |_____|_| |_||_| |_|\__, | C A S E ™
- * |___/
- */
- struct bt_ctf_field *v_field = NULL;
- struct bt_ctf_field *v_struct_field = NULL;
- struct bt_ctf_field *v_struct_id_field = NULL;
-
- // TODO: optimalize!
- v_field = bt_ctf_field_structure_get_field(
- notit->dscopes.stream_event_header, "v");
- assert(v_field);
-
- v_struct_field =
- bt_ctf_field_variant_get_current_field(v_field);
- if (!v_struct_field) {
- goto end_v_field_type;
- }
-
- // TODO: optimalize!
- v_struct_id_field =
- bt_ctf_field_structure_get_field(v_struct_field, "id");
- if (!v_struct_id_field) {
- goto end_v_field_type;
- }
-
- ret = bt_ctf_field_unsigned_integer_get_value(
- v_struct_id_field, &event_id);
- if (ret) {
- event_id = -1ULL;
- }
-
-end_v_field_type:
- BT_PUT(v_field);
- BT_PUT(v_struct_field);
- BT_PUT(v_struct_id_field);
- }
-
- if (id_field_type && event_id == -1ULL) {
- /* Check "id" field */
- struct bt_ctf_field *id_field = NULL;
- int ret;
-
- // TODO: optimalize!
- id_field = bt_ctf_field_structure_get_field(
- notit->dscopes.stream_event_header, "id");
- assert(id_field);
- assert(bt_ctf_field_is_integer(id_field) ||
- bt_ctf_field_is_enumeration(id_field));
-
- if (bt_ctf_field_is_integer(id_field)) {
- ret = bt_ctf_field_unsigned_integer_get_value(
- id_field, &event_id);
- } else {
- struct bt_ctf_field *container;
-
- container = bt_ctf_field_enumeration_get_container(
- id_field);
- assert(container);
- ret = bt_ctf_field_unsigned_integer_get_value(
- container, &event_id);
- BT_PUT(container);
- }
- assert(!ret);
- BT_PUT(id_field);
- }
-
- if (event_id == -1ULL) {
- /* Event ID not found: single event? */
- assert(bt_ctf_stream_class_get_event_class_count(
- notit->meta.stream_class) == 1);
- event_id = 0;
- }
-
- BT_PUT(notit->meta.event_class);
- notit->meta.event_class = bt_ctf_stream_class_get_event_class_by_id(
- notit->meta.stream_class, event_id);
- if (!notit->meta.event_class) {
- PERR("Cannot find event class with ID %" PRIu64 "\n", event_id);
- status = BT_CTF_NOTIF_ITER_STATUS_ERROR;
- goto end;
- }
-
-end:
- BT_PUT(event_header_type);
- BT_PUT(id_field_type);
- BT_PUT(v_field_type);
-
- return status;
-}
-
-static
-enum bt_ctf_notif_iter_status after_event_header_state(
- struct bt_ctf_notif_iter *notit)
-{
- enum bt_ctf_notif_iter_status status;
-
- status = set_current_packet_content_sizes(notit);
- if (status != BT_CTF_NOTIF_ITER_STATUS_OK) {
- PERR("Failed to set current packet and content sizes\n");
- goto end;
- }
-
- status = set_current_event_class(notit);
- if (status != BT_CTF_NOTIF_ITER_STATUS_OK) {
- PERR("Failed to set current event class\n");
- goto end;
- }
-
- notit->state = STATE_DSCOPE_STREAM_EVENT_CONTEXT_BEGIN;
-
-end:
- return status;
-}
-
-static
-enum bt_ctf_notif_iter_status read_stream_event_context_begin_state(
- struct bt_ctf_notif_iter *notit)
-{
- enum bt_ctf_notif_iter_status status = BT_CTF_NOTIF_ITER_STATUS_OK;
- struct bt_ctf_field_type *stream_event_context_type;
-
- stream_event_context_type = bt_ctf_stream_class_get_event_context_type(
- notit->meta.stream_class);
- if (!stream_event_context_type) {
- PERR("Failed to retrieve stream class's event context type\n");
- status = BT_CTF_NOTIF_ITER_STATUS_ERROR;
- goto end;
- }
-
- status = read_dscope_begin_state(notit, stream_event_context_type,
- STATE_DSCOPE_EVENT_CONTEXT_BEGIN,
- STATE_DSCOPE_STREAM_EVENT_CONTEXT_CONTINUE,
- ¬it->dscopes.stream_event_context);
-
-end:
- BT_PUT(stream_event_context_type);
-
- return status;
-}
-
-static
-enum bt_ctf_notif_iter_status read_stream_event_context_continue_state(
- struct bt_ctf_notif_iter *notit)
-{
- return read_dscope_continue_state(notit,
- STATE_DSCOPE_EVENT_CONTEXT_BEGIN);
-}
-
-static
-enum bt_ctf_notif_iter_status read_event_context_begin_state(
- struct bt_ctf_notif_iter *notit)
-{
- enum bt_ctf_notif_iter_status status = BT_CTF_NOTIF_ITER_STATUS_OK;
- struct bt_ctf_field_type *event_context_type;
-
- event_context_type = bt_ctf_event_class_get_context_type(
- notit->meta.event_class);
- if (!event_context_type) {
- PERR("Failed to retrieve event class's context type\n");
- status = BT_CTF_NOTIF_ITER_STATUS_ERROR;
- goto end;
- }
-
- status = read_dscope_begin_state(notit, event_context_type,
- STATE_DSCOPE_EVENT_PAYLOAD_BEGIN,
- STATE_DSCOPE_EVENT_CONTEXT_CONTINUE,
- ¬it->dscopes.event_context);
-
-end:
- BT_PUT(event_context_type);
-
- return status;
-}
-
-static
-enum bt_ctf_notif_iter_status read_event_context_continue_state(
- struct bt_ctf_notif_iter *notit)
-{
- return read_dscope_continue_state(notit,
- STATE_DSCOPE_EVENT_PAYLOAD_BEGIN);
-}
-
-static
-enum bt_ctf_notif_iter_status read_event_payload_begin_state(
- struct bt_ctf_notif_iter *notit)
-{
- enum bt_ctf_notif_iter_status status = BT_CTF_NOTIF_ITER_STATUS_OK;
- struct bt_ctf_field_type *event_payload_type;
-
- event_payload_type = bt_ctf_event_class_get_payload_type(
- notit->meta.event_class);
- if (!event_payload_type) {
- PERR("Failed to retrieve event class's payload type\n");
- status = BT_CTF_NOTIF_ITER_STATUS_ERROR;
- goto end;
- }
-
- status = read_dscope_begin_state(notit, event_payload_type,
- STATE_EMIT_NOTIF_EVENT,
- STATE_DSCOPE_EVENT_PAYLOAD_CONTINUE,
- ¬it->dscopes.event_payload);
-
-end:
- BT_PUT(event_payload_type);
-
- return status;
-}
-
-static
-enum bt_ctf_notif_iter_status read_event_payload_continue_state(
- struct bt_ctf_notif_iter *notit)
-{
- return read_dscope_continue_state(notit, STATE_EMIT_NOTIF_EVENT);
-}
-
-static
-enum bt_ctf_notif_iter_status skip_packet_padding_state(
- struct bt_ctf_notif_iter *notit)
-{
- enum bt_ctf_notif_iter_status status = BT_CTF_NOTIF_ITER_STATUS_OK;
- size_t bits_to_skip;
-
- assert(notit->cur_packet_size > 0);
- bits_to_skip = notit->cur_packet_size - packet_at(notit);
- if (bits_to_skip == 0) {
- notit->state = STATE_DSCOPE_TRACE_PACKET_HEADER_BEGIN;
- goto end;
- } else {
- size_t bits_to_consume;
- status = buf_ensure_available_bits(notit);
- if (status != BT_CTF_NOTIF_ITER_STATUS_OK) {
- goto end;
- }
-
- bits_to_consume = MIN(buf_available_bits(notit), bits_to_skip);
- buf_consume_bits(notit, bits_to_consume);
- bits_to_skip = notit->cur_packet_size - packet_at(notit);
- if (bits_to_skip == 0) {
- notit->state = STATE_DSCOPE_TRACE_PACKET_HEADER_BEGIN;
- goto end;
- }
- }
-
-end:
- return status;
-}
-
-static inline
-enum bt_ctf_notif_iter_status handle_state(struct bt_ctf_notif_iter *notit)
-{
- enum bt_ctf_notif_iter_status status = BT_CTF_NOTIF_ITER_STATUS_OK;
-
- PDBG("Handling state %d\n", notit->state);
-
- // TODO: optimalize!
- switch (notit->state) {
- case STATE_INIT:
- notit->state = STATE_DSCOPE_TRACE_PACKET_HEADER_BEGIN;
- break;
- case STATE_DSCOPE_TRACE_PACKET_HEADER_BEGIN:
- status = read_packet_header_begin_state(notit);
- break;
- case STATE_DSCOPE_TRACE_PACKET_HEADER_CONTINUE:
- status = read_packet_header_continue_state(notit);
- break;
- case STATE_AFTER_TRACE_PACKET_HEADER:
- status = after_packet_header_state(notit);
- break;
- case STATE_DSCOPE_STREAM_PACKET_CONTEXT_BEGIN:
- status = read_packet_context_begin_state(notit);
- break;
- case STATE_DSCOPE_STREAM_PACKET_CONTEXT_CONTINUE:
- status = read_packet_context_continue_state(notit);
- break;
- case STATE_AFTER_STREAM_PACKET_CONTEXT:
- status = after_packet_context_state(notit);
- break;
- case STATE_EMIT_NOTIF_NEW_PACKET:
- notit->state = STATE_DSCOPE_STREAM_EVENT_HEADER_BEGIN;
- break;
- case STATE_DSCOPE_STREAM_EVENT_HEADER_BEGIN:
- status = read_event_header_begin_state(notit);
- break;
- case STATE_DSCOPE_STREAM_EVENT_HEADER_CONTINUE:
- status = read_event_header_continue_state(notit);
- break;
- case STATE_AFTER_STREAM_EVENT_HEADER:
- status = after_event_header_state(notit);
- break;
- case STATE_DSCOPE_STREAM_EVENT_CONTEXT_BEGIN:
- status = read_stream_event_context_begin_state(notit);
- break;
- case STATE_DSCOPE_STREAM_EVENT_CONTEXT_CONTINUE:
- status = read_stream_event_context_continue_state(notit);
- break;
- case STATE_DSCOPE_EVENT_CONTEXT_BEGIN:
- status = read_event_context_begin_state(notit);
- break;
- case STATE_DSCOPE_EVENT_CONTEXT_CONTINUE:
- status = read_event_context_continue_state(notit);
- break;
- case STATE_DSCOPE_EVENT_PAYLOAD_BEGIN:
- status = read_event_payload_begin_state(notit);
- break;
- case STATE_DSCOPE_EVENT_PAYLOAD_CONTINUE:
- status = read_event_payload_continue_state(notit);
- break;
- case STATE_EMIT_NOTIF_EVENT:
- notit->state = STATE_DSCOPE_STREAM_EVENT_HEADER_BEGIN;
- break;
- case STATE_SKIP_PACKET_PADDING:
- status = skip_packet_padding_state(notit);
- break;
- case STATE_EMIT_NOTIF_END_OF_PACKET:
- notit->state = STATE_SKIP_PACKET_PADDING;
- break;
- }
-
- return status;
-}
-
-void bt_ctf_notif_iter_reset(struct bt_ctf_notif_iter *notit)
-{
- assert(notit);
- stack_clear(notit->stack);
- BT_PUT(notit->meta.stream_class);
- BT_PUT(notit->meta.event_class);
- BT_PUT(notit->packet);
- put_all_dscopes(notit);
- notit->buf.addr = NULL;
- notit->buf.sz = 0;
- notit->buf.at = 0;
- notit->buf.packet_offset = 0;
- notit->state = STATE_INIT;
- notit->cur_content_size = -1;
- notit->cur_packet_size = -1;
-}
-
-static
-struct bt_ctf_field *get_next_field(struct bt_ctf_notif_iter *notit)
-{
- struct bt_ctf_field *next_field = NULL;
- struct bt_ctf_field *base_field;
- struct bt_ctf_field_type *base_type;
- size_t index;
-
- assert(!stack_empty(notit->stack));
- index = stack_top(notit->stack)->index;
- base_field = stack_top(notit->stack)->base;
- base_type = bt_ctf_field_get_type(base_field);
- if (!base_type) {
- PERR("Failed to get base field's type\n");
- goto end;
- }
-
- switch (bt_ctf_field_type_get_type_id(base_type)) {
- case BT_CTF_TYPE_ID_STRUCT:
- next_field = bt_ctf_field_structure_get_field_by_index(
- base_field, index);
- break;
- case BT_CTF_TYPE_ID_ARRAY:
- next_field = bt_ctf_field_array_get_field(base_field, index);
- break;
- case BT_CTF_TYPE_ID_SEQUENCE:
- next_field = bt_ctf_field_sequence_get_field(base_field, index);
- break;
- case BT_CTF_TYPE_ID_VARIANT:
- next_field = bt_ctf_field_variant_get_current_field(base_field);
- break;
- default:
- assert(false);
- break;
- }
-
-end:
- BT_PUT(base_type);
-
- return next_field;
-}
-
-static
-enum bt_ctf_btr_status btr_signed_int_cb(int64_t value,
- struct bt_ctf_field_type *type, void *data)
-{
- enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK;
- struct bt_ctf_field *field = NULL;
- struct bt_ctf_field *int_field = NULL;
- struct bt_ctf_notif_iter *notit = data;
- int ret;
-
- /* create next field */
- field = get_next_field(notit);
- if (!field) {
- PERR("Failed to get next field (signed int)\n");
- status = BT_CTF_BTR_STATUS_ERROR;
- goto end;
- }
-
- switch(bt_ctf_field_type_get_type_id(type)) {
- case BT_CTF_TYPE_ID_INTEGER:
- /* Integer field is created field */
- BT_MOVE(int_field, field);
- break;
- case BT_CTF_TYPE_ID_ENUM:
- int_field = bt_ctf_field_enumeration_get_container(field);
- break;
- default:
- break;
- }
-
- if (!int_field) {
- PERR("Failed to get integer field\n");
- status = BT_CTF_BTR_STATUS_ERROR;
- goto end;
- }
-
- ret = bt_ctf_field_signed_integer_set_value(int_field, value);
- assert(!ret);
- stack_top(notit->stack)->index++;
-
-end:
- BT_PUT(field);
- BT_PUT(int_field);
-
- return status;
-}
-
-static
-enum bt_ctf_btr_status btr_unsigned_int_cb(uint64_t value,
- struct bt_ctf_field_type *type, void *data)
-{
- enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK;
- struct bt_ctf_field *field = NULL;
- struct bt_ctf_field *int_field = NULL;
- struct bt_ctf_notif_iter *notit = data;
- int ret;
-
- /* Create next field */
- field = get_next_field(notit);
- if (!field) {
- PERR("Failed to get next field (unsigned int)\n");
- status = BT_CTF_BTR_STATUS_ERROR;
- goto end;
- }
-
- switch(bt_ctf_field_type_get_type_id(type)) {
- case BT_CTF_TYPE_ID_INTEGER:
- /* Integer field is created field */
- BT_MOVE(int_field, field);
- break;
- case BT_CTF_TYPE_ID_ENUM:
- int_field = bt_ctf_field_enumeration_get_container(field);
- break;
- default:
- break;
- }
-
- if (!int_field) {
- PERR("Failed to get integer field\n");
- status = BT_CTF_BTR_STATUS_ERROR;
- goto end;
- }
-
- ret = bt_ctf_field_unsigned_integer_set_value(int_field, value);
- assert(!ret);
- stack_top(notit->stack)->index++;
-
-end:
- BT_PUT(field);
- BT_PUT(int_field);
-
- return status;
-}
-
-static
-enum bt_ctf_btr_status btr_floating_point_cb(double value,
- struct bt_ctf_field_type *type, void *data)
-{
- enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK;
- struct bt_ctf_field *field = NULL;
- struct bt_ctf_notif_iter *notit = data;
- int ret;
-
- /* Create next field */
- field = get_next_field(notit);
- if (!field) {
- PERR("Failed to get next field (floating point number)\n");
- status = BT_CTF_BTR_STATUS_ERROR;
- goto end;
- }
-
- ret = bt_ctf_field_floating_point_set_value(field, value);
- assert(!ret);
- stack_top(notit->stack)->index++;
-
-end:
- BT_PUT(field);
-
- return status;
-}
-
-static
-enum bt_ctf_btr_status btr_string_begin_cb(
- struct bt_ctf_field_type *type, void *data)
-{
- enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK;
- struct bt_ctf_field *field = NULL;
- struct bt_ctf_notif_iter *notit = data;
- int ret;
-
- /* Create next field */
- field = get_next_field(notit);
- if (!field) {
- PERR("Failed to get next field (string)\n");
- status = BT_CTF_BTR_STATUS_ERROR;
- goto end;
- }
-
- /*
- * Push on stack. Not a compound type per se, but we know that only
- * btr_string_cb() may be called between this call and a subsequent
- * call to btr_string_end_cb().
- */
- ret = stack_push(notit->stack, field);
- if (ret) {
- PERR("Failed to push string field onto the stack\n");
- status = BT_CTF_BTR_STATUS_ERROR;
- goto end;
- }
-
-end:
- BT_PUT(field);
-
- return status;
-}
-
-static
-enum bt_ctf_btr_status btr_string_cb(const char *value,
- size_t len, struct bt_ctf_field_type *type, void *data)
-{
- enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK;
- struct bt_ctf_field *field = NULL;
- struct bt_ctf_notif_iter *notit = data;
- int ret;
-
- /* Get string field */
- field = stack_top(notit->stack)->base;
- assert(field);
-
- /* Append current string */
- ret = bt_ctf_field_string_append_len(field, value, len);
- if (ret) {
- PERR("Failed to append a string to a string field\n");
- status = BT_CTF_BTR_STATUS_ERROR;
- goto end;
- }
-
-end:
- return status;
-}
-
-static
-enum bt_ctf_btr_status btr_string_end_cb(
- struct bt_ctf_field_type *type, void *data)
-{
- struct bt_ctf_notif_iter *notit = data;
-
- /* Pop string field */
- stack_pop(notit->stack);
-
- /* Go to next field */
- stack_top(notit->stack)->index++;
-
- return BT_CTF_BTR_STATUS_OK;
-}
-
-enum bt_ctf_btr_status btr_compound_begin_cb(
- struct bt_ctf_field_type *type, void *data)
-{
- enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK;
- struct bt_ctf_notif_iter *notit = data;
- struct bt_ctf_field *field;
- int ret;
-
- /* Create field */
- if (stack_empty(notit->stack)) {
- /* Root: create dynamic scope field */
- *notit->cur_dscope_field = bt_ctf_field_create(type);
- field = *notit->cur_dscope_field;
-
- /*
- * Field will be put at the end of this function
- * (stack_push() will take one reference, but this
- * reference is lost upon the equivalent stack_pop()
- * later), so also get it for our context to own it.
- */
- bt_get(*notit->cur_dscope_field);
- } else {
- field = get_next_field(notit);
- }
-
- if (!field) {
- PERR("Failed to get next field or create dynamic scope field\n");
- status = BT_CTF_BTR_STATUS_ERROR;
- goto end;
- }
-
- /* Push field */
- ret = stack_push(notit->stack, field);
- if (ret) {
- PERR("Failed to push compound field onto the stack\n");
- status = BT_CTF_BTR_STATUS_ERROR;
- goto end;
- }
-
-end:
- BT_PUT(field);
-
- return status;
-}
-
-enum bt_ctf_btr_status btr_compound_end_cb(
- struct bt_ctf_field_type *type, void *data)
-{
- struct bt_ctf_notif_iter *notit = data;
-
- assert(!stack_empty(notit->stack));
-
- /* Pop stack */
- stack_pop(notit->stack);
-
- /* If the stack is not empty, increment the base's index */
- if (!stack_empty(notit->stack)) {
- stack_top(notit->stack)->index++;
- }
-
- return BT_CTF_BTR_STATUS_OK;
-}
-
-static
-struct bt_ctf_field *resolve_field(struct bt_ctf_notif_iter *notit,
- struct bt_ctf_field_path *path)
-{
- struct bt_ctf_field *field = NULL;
- unsigned int i;
-
- switch (bt_ctf_field_path_get_root_scope(path)) {
- case BT_CTF_SCOPE_TRACE_PACKET_HEADER:
- field = notit->dscopes.trace_packet_header;
- break;
- case BT_CTF_SCOPE_STREAM_PACKET_CONTEXT:
- field = notit->dscopes.stream_packet_context;
- break;
- case BT_CTF_SCOPE_STREAM_EVENT_HEADER:
- field = notit->dscopes.stream_event_header;
- break;
- case BT_CTF_SCOPE_STREAM_EVENT_CONTEXT:
- field = notit->dscopes.stream_event_context;
- break;
- case BT_CTF_SCOPE_EVENT_CONTEXT:
- field = notit->dscopes.event_context;
- break;
- case BT_CTF_SCOPE_EVENT_FIELDS:
- field = notit->dscopes.event_payload;
- break;
- default:
- break;
- }
-
- if (!field) {
- goto end;
- }
-
- bt_get(field);
-
- for (i = 0; i < bt_ctf_field_path_get_index_count(path); ++i) {
- struct bt_ctf_field *next_field = NULL;
- struct bt_ctf_field_type *field_type;
- int index = bt_ctf_field_path_get_index(path, i);
-
- field_type = bt_ctf_field_get_type(field);
- if (!field_type) {
- BT_PUT(field);
- goto end;
- }
-
- if (is_struct_type(field_type)) {
- next_field = bt_ctf_field_structure_get_field_by_index(
- field, index);
- } else if (is_variant_type(field_type)) {
- next_field =
- bt_ctf_field_variant_get_current_field(field);
- }
-
- BT_PUT(field);
- BT_PUT(field_type);
-
- if (!next_field) {
- goto end;
- }
-
- /* Move next field -> field */
- BT_MOVE(field, next_field);
- }
-
-end:
- return field;
-}
-
-static
-int64_t btr_get_sequence_length_cb(struct bt_ctf_field_type *type, void *data)
-{
- int64_t ret = -1;
- int iret;
- struct bt_ctf_field_path *field_path;
- struct bt_ctf_notif_iter *notit = data;
- struct bt_ctf_field *field = NULL;
- uint64_t length;
-
- field_path = bt_ctf_field_type_sequence_get_length_field_path(type);
- if (!field_path) {
- goto end;
- }
-
- field = resolve_field(notit, field_path);
- if (!field) {
- goto end;
- }
-
- iret = bt_ctf_field_unsigned_integer_get_value(field, &length);
- if (iret) {
- goto end;
- }
-
- ret = (int64_t) length;
-
-end:
- BT_PUT(field);
- BT_PUT(field_path);
-
- return ret;
-}
-
-static
-struct bt_ctf_field_type *btr_get_variant_type_cb(
- struct bt_ctf_field_type *type, void *data)
-{
- struct bt_ctf_field_path *path;
- struct bt_ctf_notif_iter *notit = data;
- struct bt_ctf_field *tag_field = NULL;
- struct bt_ctf_field *selected_field = NULL;
- struct bt_ctf_field_type *selected_field_type = NULL;
-
- path = bt_ctf_field_type_variant_get_tag_field_path(type);
- if (!path) {
- goto end;
- }
-
- tag_field = resolve_field(notit, path);
- if (!tag_field) {
- goto end;
- }
-
- /*
- * We found the enumeration tag field instance which should be
- * able to select a current field for this variant. This
- * callback function we're in is called _after_
- * compound_begin(), so the current stack top's base field is
- * the variant field in question. We get the selected field here
- * thanks to this tag field (thus creating the selected field),
- * which will also provide us with its type. Then, this field
- * will remain the current selected one until the next callback
- * function call which is used to fill the current selected
- * field.
- */
- selected_field = bt_ctf_field_variant_get_field(
- stack_top(notit->stack)->base, tag_field);
- if (!selected_field) {
- goto end;
- }
-
- selected_field_type = bt_ctf_field_get_type(selected_field);
-
-end:
- BT_PUT(tag_field);
- BT_PUT(selected_field);
-
- return selected_field_type;
-}
-
-static struct bt_ctf_event *create_event(struct bt_ctf_notif_iter *notit)
-{
- struct bt_ctf_event *event;
- int ret;
-
- /* Create event object */
- event = bt_ctf_event_create(notit->meta.event_class);
- if (!event) {
- goto error;
- }
-
- /* Set header, stream event context, context, and payload fields */
- ret = bt_ctf_event_set_header(event,
- notit->dscopes.stream_event_header);
- if (ret) {
- goto error;
- }
-
- ret = bt_ctf_event_set_stream_event_context(event,
- notit->dscopes.stream_event_context);
- if (ret) {
- goto error;
- }
-
- ret = bt_ctf_event_set_event_context(event,
- notit->dscopes.event_context);
- if (ret) {
- goto error;
- }
-
- ret = bt_ctf_event_set_payload_field(event,
- notit->dscopes.event_payload);
- if (ret) {
- goto error;
- }
-
- /* Associate with current packet */
- assert(notit->packet);
- ret = bt_ctf_event_set_packet(event, notit->packet);
- if (ret) {
- goto error;
- }
-
- goto end;
-
-error:
- BT_PUT(event);
-
-end:
- return event;
-}
-
-static void create_packet(struct bt_ctf_notif_iter *notit)
-{
- int ret;
- struct bt_ctf_stream *stream = NULL;
- struct bt_ctf_packet *packet = NULL;
-
- /* Ask the user for the stream */
- stream = notit->medium.medops.get_stream(notit->meta.stream_class,
- notit->medium.data);
- if (!stream) {
- goto error;
- }
-
- /* Create packet */
- packet = bt_ctf_packet_create(stream);
- if (!packet) {
- goto error;
- }
-
- /* Set packet's context and header fields */
- if (notit->dscopes.trace_packet_header) {
- ret = bt_ctf_packet_set_header(packet,
- notit->dscopes.trace_packet_header);
- if (ret) {
- goto error;
- }
- }
-
- if (notit->dscopes.stream_packet_context) {
- ret = bt_ctf_packet_set_context(packet,
- notit->dscopes.stream_packet_context);
- if (ret) {
- goto error;
- }
- }
-
- goto end;
-
-error:
- BT_PUT(packet);
-
-end:
- BT_MOVE(notit->packet, packet);
-}
-
-static void notify_new_packet(struct bt_ctf_notif_iter *notit,
- struct bt_ctf_notif_iter_notif **notification)
-{
- struct bt_ctf_notif_iter_notif_new_packet *rnotif;
-
- rnotif = g_new0(struct bt_ctf_notif_iter_notif_new_packet, 1);
- if (!rnotif) {
- goto error;
- }
-
- rnotif->base.type = BT_CTF_NOTIF_ITER_NOTIF_NEW_PACKET;
-
- /* Create packet */
- create_packet(notit);
- if (!notit->packet) {
- goto error;
- }
-
- rnotif->packet = bt_get(notit->packet);
- *notification = (struct bt_ctf_notif_iter_notif *) rnotif;
- return;
-
-error:
- bt_ctf_notif_iter_notif_destroy(rnotif);
-}
-
-static void notify_end_of_packet(struct bt_ctf_notif_iter *notit,
- struct bt_ctf_notif_iter_notif **notification)
-{
- struct bt_ctf_notif_iter_notif_end_of_packet *rnotif;
-
- rnotif = g_new0(struct bt_ctf_notif_iter_notif_end_of_packet, 1);
- if (!rnotif) {
- goto error;
- }
-
- rnotif->base.type = BT_CTF_NOTIF_ITER_NOTIF_END_OF_PACKET;
-
- /* Create packet */
- create_packet(notit);
- if (!notit->packet) {
- goto error;
- }
-
- rnotif->packet = bt_get(notit->packet);
- *notification = (struct bt_ctf_notif_iter_notif *) rnotif;
- return;
-
-error:
- bt_ctf_notif_iter_notif_destroy(rnotif);
-}
-
-static void notify_event(struct bt_ctf_notif_iter *notit,
- struct bt_ctf_notif_iter_notif **notification)
-{
- struct bt_ctf_notif_iter_notif_event *rnotif;
- struct bt_ctf_event *event = NULL;
-
- rnotif = g_new0(struct bt_ctf_notif_iter_notif_event, 1);
- if (!rnotif) {
- goto error;
- }
-
- rnotif->base.type = BT_CTF_NOTIF_ITER_NOTIF_EVENT;
-
- /* Create event */
- event = create_event(notit);
- if (!event) {
- goto error;
- }
-
- BT_MOVE(rnotif->event, event);
- *notification = (struct bt_ctf_notif_iter_notif *) rnotif;
- return;
-
-error:
- BT_PUT(event);
- bt_ctf_notif_iter_notif_destroy(rnotif);
-}
-
-void bt_ctf_notif_iter_notif_destroy(void *vnotif)
-{
- struct bt_ctf_notif_iter_notif *notif = vnotif;
-
- switch (notif->type) {
- case BT_CTF_NOTIF_ITER_NOTIF_NEW_PACKET:
- {
- struct bt_ctf_notif_iter_notif_new_packet *rnotif =
- (struct bt_ctf_notif_iter_notif_new_packet *) notif;
-
- BT_PUT(rnotif->packet);
- break;
- }
- case BT_CTF_NOTIF_ITER_NOTIF_END_OF_PACKET:
- {
- struct bt_ctf_notif_iter_notif_end_of_packet *rnotif =
- (struct bt_ctf_notif_iter_notif_end_of_packet *) notif;
-
- BT_PUT(rnotif->packet);
- break;
- }
- case BT_CTF_NOTIF_ITER_NOTIF_EVENT:
- {
- struct bt_ctf_notif_iter_notif_event *rnotif =
- (struct bt_ctf_notif_iter_notif_event *) notif;
-
- BT_PUT(rnotif->event);
- break;
- }
- default:
- assert(false);
- }
-
- g_free(notif);
-}
-
-struct bt_ctf_notif_iter *bt_ctf_notif_iter_create(struct bt_ctf_trace *trace,
- size_t max_request_sz,
- struct bt_ctf_notif_iter_medium_ops medops,
- void *data, FILE *err_stream)
-{
- struct bt_ctf_notif_iter *notit = NULL;
- struct bt_ctf_btr_cbs cbs = {
- .types = {
- .signed_int = btr_signed_int_cb,
- .unsigned_int = btr_unsigned_int_cb,
- .floating_point = btr_floating_point_cb,
- .string_begin = btr_string_begin_cb,
- .string = btr_string_cb,
- .string_end = btr_string_end_cb,
- .compound_begin = btr_compound_begin_cb,
- .compound_end = btr_compound_end_cb,
- },
- .query = {
- .get_sequence_length = btr_get_sequence_length_cb,
- .get_variant_type = btr_get_variant_type_cb,
- },
- };
-
- assert(trace);
- assert(medops.request_bytes);
- notit = g_new0(struct bt_ctf_notif_iter, 1);
- if (!notit) {
- PERR("Failed to allocate memory for CTF notification iterator\n");
- goto end;
- }
-
- notit->meta.trace = trace;
- bt_get(notit->meta.trace);
- notit->medium.medops = medops;
- notit->medium.max_request_sz = max_request_sz;
- notit->medium.data = data;
- notit->err_stream = err_stream;
- notit->stack = stack_new(notit);
- if (!notit->stack) {
- PERR("Failed to create stack\n");
- bt_ctf_notif_iter_destroy(notit);
- notit = NULL;
- goto end;
- }
-
- notit->btr = bt_ctf_btr_create(cbs, notit, err_stream);
- if (!notit->btr) {
- PERR("Failed to create binary type reader\n");
- bt_ctf_notif_iter_destroy(notit);
- notit = NULL;
- goto end;
- }
-
- bt_ctf_notif_iter_reset(notit);
-
-end:
- return notit;
-}
-
-void bt_ctf_notif_iter_destroy(struct bt_ctf_notif_iter *notit)
-{
- BT_PUT(notit->meta.trace);
- BT_PUT(notit->meta.stream_class);
- BT_PUT(notit->meta.event_class);
- BT_PUT(notit->packet);
- put_all_dscopes(notit);
-
- if (notit->stack) {
- stack_destroy(notit->stack);
- }
-
- if (notit->btr) {
- bt_ctf_btr_destroy(notit->btr);
- }
-
- g_free(notit);
-}
-
-enum bt_ctf_notif_iter_status bt_ctf_notif_iter_get_next_notification(
- struct bt_ctf_notif_iter *notit,
- struct bt_ctf_notif_iter_notif **notification)
-{
- enum bt_ctf_notif_iter_status status = BT_CTF_NOTIF_ITER_STATUS_OK;
-
- assert(notit);
- assert(notification);
-
- while (true) {
- status = handle_state(notit);
- if (status != BT_CTF_NOTIF_ITER_STATUS_OK) {
- if (status == BT_CTF_NOTIF_ITER_STATUS_EOF) {
- PDBG("Medium operation reported end of file\n");
- } else {
- PERR("Failed to handle state:\n");
- PERR(" State: %d\n", notit->state);
- }
- goto end;
- }
-
- switch (notit->state) {
- case STATE_EMIT_NOTIF_NEW_PACKET:
- PDBG("Emitting new packet notification\n");
- notify_new_packet(notit, notification);
- if (!*notification) {
- status = BT_CTF_NOTIF_ITER_STATUS_ERROR;
- }
- goto end;
- case STATE_EMIT_NOTIF_EVENT:
- PDBG("Emitting event notification\n");
- notify_event(notit, notification);
- if (!*notification) {
- status = BT_CTF_NOTIF_ITER_STATUS_ERROR;
- }
- goto end;
- case STATE_EMIT_NOTIF_END_OF_PACKET:
- PDBG("Emitting end of packet notification\n");
- notify_end_of_packet(notit, notification);
- if (!*notification) {
- status = BT_CTF_NOTIF_ITER_STATUS_ERROR;
- }
- goto end;
- default:
- /* Non-emitting state: continue */
- break;
- }
- }
-
-end:
- return status;
-}
projects / babeltrace.git / blobdiff