*
* Format registration.
*
- * Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
+ *
+ * Author: Mathieu Desnoyers <mathieu.desnoyers@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
#include <babeltrace/format.h>
#include <babeltrace/ctf/types.h>
+#include <babeltrace/ctf/metadata.h>
+#include <babeltrace/babeltrace-internal.h>
+#include <babeltrace/ctf/events-internal.h>
+#include <babeltrace/trace-handle-internal.h>
+#include <babeltrace/context-internal.h>
+#include <babeltrace/uuid.h>
+#include <babeltrace/endian.h>
+#include <inttypes.h>
+#include <stdio.h>
+#include <sys/mman.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <glib.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+#include "metadata/ctf-scanner.h"
+#include "metadata/ctf-parser.h"
+#include "metadata/ctf-ast.h"
+#include "events-private.h"
+#include "memstream.h"
+
+/*
+ * We currently simply map a page to read the packet header and packet
+ * context to get the packet length and content length. (in bits)
+ */
+#define MAX_PACKET_HEADER_LEN (getpagesize() * CHAR_BIT)
+#define WRITE_PACKET_LEN (getpagesize() * 8 * CHAR_BIT)
+
+#ifndef min
+#define min(a, b) (((a) < (b)) ? (a) : (b))
+#endif
+
+#define NSEC_PER_SEC 1000000000ULL
+
+int opt_clock_raw,
+ opt_clock_seconds,
+ opt_clock_date,
+ opt_clock_gmt;
+
+uint64_t opt_clock_offset;
-void __attribute__((constructor)) ctf_init(void);
-
-static struct format ctf_format = {
- .uint_read = ctf_uint_read,
- .int_read = ctf_int_read,
- .uint_write = ctf_uint_write,
- .int_write = ctf_int_write,
- .double_read = ctf_double_read,
- .double_write = ctf_double_write,
- .float_copy = ctf_float_copy,
- .string_copy = ctf_string_copy,
- .string_read = ctf_string_read,
- .string_write = ctf_string_write,
- .string_free_temp = ctf_string_free_temp,
- .enum_read = ctf_enum_read,
- .enum_write = ctf_enum_write,
- .struct_begin = ctf_struct_begin,
- .struct_end = ctf_struct_end,
- .array_begin = ctf_array_begin,
- .array_end = ctf_array_end,
- .sequence_begin = ctf_sequence_begin,
- .sequence_end = ctf_sequence_end,
+extern int yydebug;
+
+static
+struct trace_descriptor *ctf_open_trace(const char *path, int flags,
+ void (*packet_seek)(struct stream_pos *pos, size_t index,
+ int whence),
+ FILE *metadata_fp);
+static
+struct trace_descriptor *ctf_open_mmap_trace(
+ struct mmap_stream_list *mmap_list,
+ void (*packet_seek)(struct stream_pos *pos, size_t index,
+ int whence),
+ FILE *metadata_fp);
+static
+void ctf_set_context(struct trace_descriptor *descriptor,
+ struct bt_context *ctx);
+static
+void ctf_set_handle(struct trace_descriptor *descriptor,
+ struct bt_trace_handle *handle);
+
+static
+void ctf_close_trace(struct trace_descriptor *descriptor);
+
+static
+rw_dispatch read_dispatch_table[] = {
+ [ CTF_TYPE_INTEGER ] = ctf_integer_read,
+ [ CTF_TYPE_FLOAT ] = ctf_float_read,
+ [ CTF_TYPE_ENUM ] = ctf_enum_read,
+ [ CTF_TYPE_STRING ] = ctf_string_read,
+ [ CTF_TYPE_STRUCT ] = ctf_struct_rw,
+ [ CTF_TYPE_VARIANT ] = ctf_variant_rw,
+ [ CTF_TYPE_ARRAY ] = ctf_array_read,
+ [ CTF_TYPE_SEQUENCE ] = ctf_sequence_read,
+};
+
+static
+rw_dispatch write_dispatch_table[] = {
+ [ CTF_TYPE_INTEGER ] = ctf_integer_write,
+ [ CTF_TYPE_FLOAT ] = ctf_float_write,
+ [ CTF_TYPE_ENUM ] = ctf_enum_write,
+ [ CTF_TYPE_STRING ] = ctf_string_write,
+ [ CTF_TYPE_STRUCT ] = ctf_struct_rw,
+ [ CTF_TYPE_VARIANT ] = ctf_variant_rw,
+ [ CTF_TYPE_ARRAY ] = ctf_array_write,
+ [ CTF_TYPE_SEQUENCE ] = ctf_sequence_write,
+};
+
+static
+struct format ctf_format = {
+ .open_trace = ctf_open_trace,
+ .open_mmap_trace = ctf_open_mmap_trace,
+ .close_trace = ctf_close_trace,
+ .set_context = ctf_set_context,
+ .set_handle = ctf_set_handle,
};
-void ctf_init(void)
+/*
+ * Update stream current timestamp, keep at clock frequency.
+ */
+static
+void ctf_update_timestamp(struct ctf_stream *stream,
+ struct definition_integer *integer_definition)
+{
+ struct declaration_integer *integer_declaration =
+ integer_definition->declaration;
+ uint64_t oldval, newval, updateval;
+
+ if (unlikely(integer_declaration->len == 64)) {
+ stream->timestamp = integer_definition->value._unsigned;
+ return;
+ }
+ /* keep low bits */
+ oldval = stream->timestamp;
+ oldval &= (1ULL << integer_declaration->len) - 1;
+ newval = integer_definition->value._unsigned;
+ /* Test for overflow by comparing low bits */
+ if (newval < oldval)
+ newval += 1ULL << integer_declaration->len;
+ /* updateval contains old high bits, and new low bits (sum) */
+ updateval = stream->timestamp;
+ updateval &= ~((1ULL << integer_declaration->len) - 1);
+ updateval += newval;
+ stream->prev_timestamp = stream->timestamp;
+ stream->timestamp = updateval;
+}
+
+/*
+ * Print timestamp, rescaling clock frequency to nanoseconds and
+ * applying offsets as needed (unix time).
+ */
+void ctf_print_timestamp(FILE *fp,
+ struct ctf_stream *stream,
+ uint64_t timestamp)
+{
+ uint64_t ts_sec = 0, ts_nsec;
+
+ if (opt_clock_raw) {
+ ts_nsec = ctf_get_timestamp_raw(stream, timestamp);
+ } else {
+ ts_nsec = ctf_get_timestamp(stream, timestamp);
+ }
+
+ /* Add command-line offset */
+ ts_sec += opt_clock_offset;
+
+ ts_sec += ts_nsec / NSEC_PER_SEC;
+ ts_nsec = ts_nsec % NSEC_PER_SEC;
+
+ if (!opt_clock_seconds) {
+ struct tm tm;
+ time_t time_s = (time_t) ts_sec;
+
+ if (!opt_clock_gmt) {
+ struct tm *res;
+
+ res = localtime_r(&time_s, &tm);
+ if (!res) {
+ fprintf(stderr, "[warning] Unable to get localtime.\n");
+ goto seconds;
+ }
+ } else {
+ struct tm *res;
+
+ res = gmtime_r(&time_s, &tm);
+ if (!res) {
+ fprintf(stderr, "[warning] Unable to get gmtime.\n");
+ goto seconds;
+ }
+ }
+ if (opt_clock_date) {
+ char timestr[26];
+ size_t res;
+
+ /* Print date and time */
+ res = strftime(timestr, sizeof(timestr),
+ "%F ", &tm);
+ if (!res) {
+ fprintf(stderr, "[warning] Unable to print ascii time.\n");
+ goto seconds;
+ }
+ fprintf(fp, "%s", timestr);
+ }
+ /* Print time in HH:MM:SS.ns */
+ fprintf(fp, "%02d:%02d:%02d.%09" PRIu64,
+ tm.tm_hour, tm.tm_min, tm.tm_sec, ts_nsec);
+ goto end;
+ }
+seconds:
+ fprintf(fp, "%3" PRIu64 ".%09" PRIu64,
+ ts_sec, ts_nsec);
+
+end:
+ return;
+}
+
+static
+int ctf_read_event(struct stream_pos *ppos, struct ctf_stream *stream)
+{
+ struct ctf_stream_pos *pos =
+ container_of(ppos, struct ctf_stream_pos, parent);
+ struct ctf_stream_declaration *stream_class = stream->stream_class;
+ struct ctf_event_definition *event;
+ uint64_t id = 0;
+ int ret;
+
+ /* We need to check for EOF here for empty files. */
+ if (unlikely(pos->offset == EOF))
+ return EOF;
+
+ ctf_pos_get_event(pos);
+
+ /* save the current position as a restore point */
+ pos->last_offset = pos->offset;
+ /* we just read the event, it is consumed when used by the caller */
+ stream->consumed = 0;
+
+ /*
+ * This is the EOF check after we've advanced the position in
+ * ctf_pos_get_event.
+ */
+ if (unlikely(pos->offset == EOF))
+ return EOF;
+ assert(pos->offset < pos->content_size);
+
+ /* Read event header */
+ if (likely(stream->stream_event_header)) {
+ struct definition_integer *integer_definition;
+ struct definition *variant;
+
+ ret = generic_rw(ppos, &stream->stream_event_header->p);
+ if (unlikely(ret))
+ goto error;
+ /* lookup event id */
+ integer_definition = lookup_integer(&stream->stream_event_header->p, "id", FALSE);
+ if (integer_definition) {
+ id = integer_definition->value._unsigned;
+ } else {
+ struct definition_enum *enum_definition;
+
+ enum_definition = lookup_enum(&stream->stream_event_header->p, "id", FALSE);
+ if (enum_definition) {
+ id = enum_definition->integer->value._unsigned;
+ }
+ }
+
+ variant = lookup_variant(&stream->stream_event_header->p, "v");
+ if (variant) {
+ integer_definition = lookup_integer(variant, "id", FALSE);
+ if (integer_definition) {
+ id = integer_definition->value._unsigned;
+ }
+ }
+ stream->event_id = id;
+
+ /* lookup timestamp */
+ stream->has_timestamp = 0;
+ integer_definition = lookup_integer(&stream->stream_event_header->p, "timestamp", FALSE);
+ if (integer_definition) {
+ ctf_update_timestamp(stream, integer_definition);
+ stream->has_timestamp = 1;
+ } else {
+ if (variant) {
+ integer_definition = lookup_integer(variant, "timestamp", FALSE);
+ if (integer_definition) {
+ ctf_update_timestamp(stream, integer_definition);
+ stream->has_timestamp = 1;
+ }
+ }
+ }
+ }
+
+ /* Read stream-declared event context */
+ if (stream->stream_event_context) {
+ ret = generic_rw(ppos, &stream->stream_event_context->p);
+ if (ret)
+ goto error;
+ }
+
+ if (unlikely(id >= stream_class->events_by_id->len)) {
+ fprintf(stderr, "[error] Event id %" PRIu64 " is outside range.\n", id);
+ return -EINVAL;
+ }
+ event = g_ptr_array_index(stream->events_by_id, id);
+ if (unlikely(!event)) {
+ fprintf(stderr, "[error] Event id %" PRIu64 " is unknown.\n", id);
+ return -EINVAL;
+ }
+
+ /* Read event-declared event context */
+ if (event->event_context) {
+ ret = generic_rw(ppos, &event->event_context->p);
+ if (ret)
+ goto error;
+ }
+
+ /* Read event payload */
+ if (likely(event->event_fields)) {
+ ret = generic_rw(ppos, &event->event_fields->p);
+ if (ret)
+ goto error;
+ }
+
+ return 0;
+
+error:
+ fprintf(stderr, "[error] Unexpected end of stream. Either the trace data stream is corrupted or metadata description does not match data layout.\n");
+ return ret;
+}
+
+static
+int ctf_write_event(struct stream_pos *pos, struct ctf_stream *stream)
+{
+ struct ctf_stream_declaration *stream_class = stream->stream_class;
+ struct ctf_event_definition *event;
+ uint64_t id;
+ int ret;
+
+ id = stream->event_id;
+
+ /* print event header */
+ if (likely(stream->stream_event_header)) {
+ ret = generic_rw(pos, &stream->stream_event_header->p);
+ if (ret)
+ goto error;
+ }
+
+ /* print stream-declared event context */
+ if (stream->stream_event_context) {
+ ret = generic_rw(pos, &stream->stream_event_context->p);
+ if (ret)
+ goto error;
+ }
+
+ if (unlikely(id >= stream_class->events_by_id->len)) {
+ fprintf(stderr, "[error] Event id %" PRIu64 " is outside range.\n", id);
+ return -EINVAL;
+ }
+ event = g_ptr_array_index(stream->events_by_id, id);
+ if (unlikely(!event)) {
+ fprintf(stderr, "[error] Event id %" PRIu64 " is unknown.\n", id);
+ return -EINVAL;
+ }
+
+ /* print event-declared event context */
+ if (event->event_context) {
+ ret = generic_rw(pos, &event->event_context->p);
+ if (ret)
+ goto error;
+ }
+
+ /* Read and print event payload */
+ if (likely(event->event_fields)) {
+ ret = generic_rw(pos, &event->event_fields->p);
+ if (ret)
+ goto error;
+ }
+
+ return 0;
+
+error:
+ fprintf(stderr, "[error] Unexpected end of stream. Either the trace data stream is corrupted or metadata description does not match data layout.\n");
+ return ret;
+}
+
+void ctf_init_pos(struct ctf_stream_pos *pos, int fd, int open_flags)
+{
+ pos->fd = fd;
+ pos->mmap_offset = 0;
+ pos->packet_size = 0;
+ pos->content_size = 0;
+ pos->content_size_loc = NULL;
+ pos->base = NULL;
+ pos->offset = 0;
+ pos->dummy = false;
+ pos->cur_index = 0;
+ if (fd >= 0)
+ pos->packet_index = g_array_new(FALSE, TRUE,
+ sizeof(struct packet_index));
+ else
+ pos->packet_index = NULL;
+ switch (open_flags & O_ACCMODE) {
+ case O_RDONLY:
+ pos->prot = PROT_READ;
+ pos->flags = MAP_PRIVATE;
+ pos->parent.rw_table = read_dispatch_table;
+ pos->parent.event_cb = ctf_read_event;
+ break;
+ case O_RDWR:
+ pos->prot = PROT_WRITE; /* Write has priority */
+ pos->flags = MAP_SHARED;
+ pos->parent.rw_table = write_dispatch_table;
+ pos->parent.event_cb = ctf_write_event;
+ if (fd >= 0)
+ ctf_packet_seek(&pos->parent, 0, SEEK_SET); /* position for write */
+ break;
+ default:
+ assert(0);
+ }
+}
+
+void ctf_fini_pos(struct ctf_stream_pos *pos)
+{
+ int ret;
+
+ if (pos->prot == PROT_WRITE && pos->content_size_loc)
+ *pos->content_size_loc = pos->offset;
+ if (pos->base) {
+ /* unmap old base */
+ ret = munmap(pos->base, pos->packet_size / CHAR_BIT);
+ if (ret) {
+ fprintf(stderr, "[error] Unable to unmap old base: %s.\n",
+ strerror(errno));
+ assert(0);
+ }
+ }
+ (void) g_array_free(pos->packet_index, TRUE);
+}
+
+/*
+ * for SEEK_CUR: go to next packet.
+ * for SEEK_POS: go to packet numer (index).
+ */
+void ctf_packet_seek(struct stream_pos *stream_pos, size_t index, int whence)
+{
+ struct ctf_stream_pos *pos =
+ container_of(stream_pos, struct ctf_stream_pos, parent);
+ struct ctf_file_stream *file_stream =
+ container_of(pos, struct ctf_file_stream, pos);
+ int ret;
+ off_t off;
+ struct packet_index *packet_index;
+
+ if (pos->prot == PROT_WRITE && pos->content_size_loc)
+ *pos->content_size_loc = pos->offset;
+
+ if (pos->base) {
+ /* unmap old base */
+ ret = munmap(pos->base, pos->packet_size / CHAR_BIT);
+ if (ret) {
+ fprintf(stderr, "[error] Unable to unmap old base: %s.\n",
+ strerror(errno));
+ assert(0);
+ }
+ pos->base = NULL;
+ }
+
+ /*
+ * The caller should never ask for ctf_move_pos across packets,
+ * except to get exactly at the beginning of the next packet.
+ */
+ if (pos->prot == PROT_WRITE) {
+ switch (whence) {
+ case SEEK_CUR:
+ /* The writer will add padding */
+ pos->mmap_offset += WRITE_PACKET_LEN / CHAR_BIT;
+ break;
+ case SEEK_SET:
+ assert(index == 0); /* only seek supported for now */
+ pos->cur_index = 0;
+ break;
+ default:
+ assert(0);
+ }
+ pos->content_size = -1U; /* Unknown at this point */
+ pos->packet_size = WRITE_PACKET_LEN;
+ off = posix_fallocate(pos->fd, pos->mmap_offset,
+ pos->packet_size / CHAR_BIT);
+ assert(off >= 0);
+ pos->offset = 0;
+ } else {
+ read_next_packet:
+ switch (whence) {
+ case SEEK_CUR:
+ {
+ uint32_t events_discarded_diff;
+
+ if (pos->offset == EOF) {
+ return;
+ }
+ /* For printing discarded event count */
+ packet_index = &g_array_index(pos->packet_index,
+ struct packet_index, pos->cur_index);
+ events_discarded_diff = packet_index->events_discarded;
+ file_stream->parent.prev_timestamp_end =
+ packet_index->timestamp_end;
+ if (pos->cur_index > 0) {
+ packet_index = &g_array_index(pos->packet_index,
+ struct packet_index,
+ pos->cur_index - 1);
+ events_discarded_diff -= packet_index->events_discarded;
+ }
+ file_stream->parent.events_discarded = events_discarded_diff;
+ file_stream->parent.prev_timestamp = file_stream->parent.timestamp;
+ /* The reader will expect us to skip padding */
+ ++pos->cur_index;
+ break;
+ }
+ case SEEK_SET:
+ pos->cur_index = index;
+ file_stream->parent.prev_timestamp = 0;
+ file_stream->parent.prev_timestamp_end = 0;
+ break;
+ default:
+ assert(0);
+ }
+ if (pos->cur_index >= pos->packet_index->len) {
+ /*
+ * When a stream reaches the end of the
+ * file, we need to show the number of
+ * events discarded ourselves, because
+ * there is no next event scheduled to
+ * be printed in the output.
+ */
+ if (file_stream->parent.events_discarded) {
+ /*
+ * We need to check if we are in trace
+ * read or called from packet indexing.
+ * In this last case, the collection is
+ * not there, so we cannot print the
+ * timestamps.
+ */
+ if ((&file_stream->parent)->stream_class->trace->collection) {
+ fflush(stdout);
+ fprintf(stderr, "[warning] Tracer discarded %d events at end of stream between [",
+ file_stream->parent.events_discarded);
+ ctf_print_timestamp(stderr, &file_stream->parent,
+ file_stream->parent.prev_timestamp);
+ fprintf(stderr, "] and [");
+ ctf_print_timestamp(stderr, &file_stream->parent,
+ file_stream->parent.prev_timestamp_end);
+ fprintf(stderr, "]. You should consider increasing the buffer size.\n");
+ fflush(stderr);
+ }
+ file_stream->parent.events_discarded = 0;
+ }
+ pos->offset = EOF;
+ return;
+ }
+ packet_index = &g_array_index(pos->packet_index, struct packet_index,
+ pos->cur_index);
+ pos->mmap_offset = packet_index->offset;
+
+ /* Lookup context/packet size in index */
+ file_stream->parent.timestamp = packet_index->timestamp_begin;
+ pos->content_size = packet_index->content_size;
+ pos->packet_size = packet_index->packet_size;
+ if (packet_index->data_offset < packet_index->content_size) {
+ pos->offset = 0; /* will read headers */
+ } else if (packet_index->data_offset == packet_index->content_size) {
+ /* empty packet */
+ pos->offset = packet_index->data_offset;
+ whence = SEEK_CUR;
+ goto read_next_packet;
+ } else {
+ pos->offset = EOF;
+ return;
+ }
+ }
+ /* map new base. Need mapping length from header. */
+ pos->base = mmap(NULL, pos->packet_size / CHAR_BIT, pos->prot,
+ pos->flags, pos->fd, pos->mmap_offset);
+ if (pos->base == MAP_FAILED) {
+ fprintf(stderr, "[error] mmap error %s.\n",
+ strerror(errno));
+ assert(0);
+ }
+
+ /* update trace_packet_header and stream_packet_context */
+ if (pos->prot != PROT_WRITE && file_stream->parent.trace_packet_header) {
+ /* Read packet header */
+ ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p);
+ assert(!ret);
+ }
+ if (pos->prot != PROT_WRITE && file_stream->parent.stream_packet_context) {
+ /* Read packet context */
+ ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p);
+ assert(!ret);
+ }
+}
+
+static
+int packet_metadata(struct ctf_trace *td, FILE *fp)
+{
+ uint32_t magic;
+ size_t len;
+ int ret = 0;
+
+ len = fread(&magic, sizeof(magic), 1, fp);
+ if (len != 1) {
+ goto end;
+ }
+ if (magic == TSDL_MAGIC) {
+ ret = 1;
+ td->byte_order = BYTE_ORDER;
+ CTF_TRACE_SET_FIELD(td, byte_order);
+ } else if (magic == GUINT32_SWAP_LE_BE(TSDL_MAGIC)) {
+ ret = 1;
+ td->byte_order = (BYTE_ORDER == BIG_ENDIAN) ?
+ LITTLE_ENDIAN : BIG_ENDIAN;
+ CTF_TRACE_SET_FIELD(td, byte_order);
+ }
+end:
+ rewind(fp);
+ return ret;
+}
+
+/*
+ * Returns 0 on success, -1 on error.
+ */
+static
+int check_version(unsigned int major, unsigned int minor)
+{
+ switch (major) {
+ case 1:
+ switch (minor) {
+ case 8:
+ return 0;
+ default:
+ goto warning;
+ }
+ default:
+ goto warning;
+
+ }
+
+ /* eventually return an error instead of warning */
+warning:
+ fprintf(stderr, "[warning] Unsupported CTF specification version %u.%u. Trying anyway.\n",
+ major, minor);
+ return 0;
+}
+
+static
+int ctf_open_trace_metadata_packet_read(struct ctf_trace *td, FILE *in,
+ FILE *out)
+{
+ struct metadata_packet_header header;
+ size_t readlen, writelen, toread;
+ char buf[4096 + 1]; /* + 1 for debug-mode \0 */
+ int ret = 0;
+
+ readlen = fread(&header, header_sizeof(header), 1, in);
+ if (readlen < 1)
+ return -EINVAL;
+
+ if (td->byte_order != BYTE_ORDER) {
+ header.magic = GUINT32_SWAP_LE_BE(header.magic);
+ header.checksum = GUINT32_SWAP_LE_BE(header.checksum);
+ header.content_size = GUINT32_SWAP_LE_BE(header.content_size);
+ header.packet_size = GUINT32_SWAP_LE_BE(header.packet_size);
+ }
+ if (header.checksum)
+ fprintf(stderr, "[warning] checksum verification not supported yet.\n");
+ if (header.compression_scheme) {
+ fprintf(stderr, "[error] compression (%u) not supported yet.\n",
+ header.compression_scheme);
+ return -EINVAL;
+ }
+ if (header.encryption_scheme) {
+ fprintf(stderr, "[error] encryption (%u) not supported yet.\n",
+ header.encryption_scheme);
+ return -EINVAL;
+ }
+ if (header.checksum_scheme) {
+ fprintf(stderr, "[error] checksum (%u) not supported yet.\n",
+ header.checksum_scheme);
+ return -EINVAL;
+ }
+ if (check_version(header.major, header.minor) < 0)
+ return -EINVAL;
+ if (!CTF_TRACE_FIELD_IS_SET(td, uuid)) {
+ memcpy(td->uuid, header.uuid, sizeof(header.uuid));
+ CTF_TRACE_SET_FIELD(td, uuid);
+ } else {
+ if (babeltrace_uuid_compare(header.uuid, td->uuid))
+ return -EINVAL;
+ }
+
+ toread = (header.content_size / CHAR_BIT) - header_sizeof(header);
+
+ for (;;) {
+ readlen = fread(buf, sizeof(char), min(sizeof(buf) - 1, toread), in);
+ if (ferror(in)) {
+ ret = -EINVAL;
+ break;
+ }
+ if (babeltrace_debug) {
+ buf[readlen] = '\0';
+ fprintf(stderr, "[debug] metadata packet read: %s\n",
+ buf);
+ }
+
+ writelen = fwrite(buf, sizeof(char), readlen, out);
+ if (writelen < readlen) {
+ ret = -EIO;
+ break;
+ }
+ if (ferror(out)) {
+ ret = -EINVAL;
+ break;
+ }
+ toread -= readlen;
+ if (!toread) {
+ ret = 0; /* continue reading next packet */
+ goto read_padding;
+ }
+ }
+ return ret;
+
+read_padding:
+ toread = (header.packet_size - header.content_size) / CHAR_BIT;
+ ret = fseek(in, toread, SEEK_CUR);
+ if (ret < 0) {
+ fprintf(stderr, "[warning] Missing padding at end of file\n");
+ ret = 0;
+ }
+ return ret;
+}
+
+static
+int ctf_open_trace_metadata_stream_read(struct ctf_trace *td, FILE **fp,
+ char **buf)
+{
+ FILE *in, *out;
+ size_t size;
+ int ret;
+
+ in = *fp;
+ /*
+ * Using strlen on *buf instead of size of open_memstream
+ * because its size includes garbage at the end (after final
+ * \0). This is the allocated size, not the actual string size.
+ */
+ out = babeltrace_open_memstream(buf, &size);
+ if (out == NULL) {
+ perror("Metadata open_memstream");
+ return -errno;
+ }
+ for (;;) {
+ ret = ctf_open_trace_metadata_packet_read(td, in, out);
+ if (ret) {
+ break;
+ }
+ if (feof(in)) {
+ ret = 0;
+ break;
+ }
+ }
+ /* close to flush the buffer */
+ ret = babeltrace_close_memstream(buf, &size, out);
+ if (ret < 0) {
+ perror("babeltrace_flush_memstream");
+ fclose(in);
+ return -errno;
+ }
+ fclose(in);
+ /* open for reading */
+ *fp = babeltrace_fmemopen(*buf, strlen(*buf), "rb");
+ if (!*fp) {
+ perror("Metadata fmemopen");
+ return -errno;
+ }
+ return 0;
+}
+
+static
+int ctf_open_trace_metadata_read(struct ctf_trace *td,
+ void (*packet_seek)(struct stream_pos *pos, size_t index,
+ int whence), FILE *metadata_fp)
+{
+ struct ctf_scanner *scanner;
+ struct ctf_file_stream *metadata_stream;
+ FILE *fp;
+ char *buf = NULL;
+ int ret = 0;
+
+ metadata_stream = g_new0(struct ctf_file_stream, 1);
+
+ if (packet_seek) {
+ metadata_stream->pos.packet_seek = packet_seek;
+ } else {
+ fprintf(stderr, "[error] packet_seek function undefined.\n");
+ ret = -1;
+ goto end_stream;
+ }
+
+ if (metadata_fp) {
+ fp = metadata_fp;
+ } else {
+ td->metadata = &metadata_stream->parent;
+ metadata_stream->pos.fd = openat(td->dirfd, "metadata", O_RDONLY);
+ if (metadata_stream->pos.fd < 0) {
+ fprintf(stderr, "Unable to open metadata.\n");
+ return metadata_stream->pos.fd;
+ }
+
+ fp = fdopen(metadata_stream->pos.fd, "r");
+ if (!fp) {
+ fprintf(stderr, "[error] Unable to open metadata stream.\n");
+ perror("Metadata stream open");
+ ret = -errno;
+ goto end_stream;
+ }
+ }
+ if (babeltrace_debug)
+ yydebug = 1;
+
+ if (packet_metadata(td, fp)) {
+ ret = ctf_open_trace_metadata_stream_read(td, &fp, &buf);
+ if (ret)
+ goto end_packet_read;
+ } else {
+ unsigned int major, minor;
+ ssize_t nr_items;
+
+ td->byte_order = BYTE_ORDER;
+
+ /* Check text-only metadata header and version */
+ nr_items = fscanf(fp, "/* CTF %u.%u", &major, &minor);
+ if (nr_items < 2)
+ fprintf(stderr, "[warning] Ill-shapen or missing \"/* CTF x.y\" header for text-only metadata.\n");
+ if (check_version(major, minor) < 0) {
+ ret = -EINVAL;
+ goto end_packet_read;
+ }
+ rewind(fp);
+ }
+
+ scanner = ctf_scanner_alloc(fp);
+ if (!scanner) {
+ fprintf(stderr, "[error] Error allocating scanner\n");
+ ret = -ENOMEM;
+ goto end_scanner_alloc;
+ }
+ ret = ctf_scanner_append_ast(scanner);
+ if (ret) {
+ fprintf(stderr, "[error] Error creating AST\n");
+ goto end;
+ }
+
+ if (babeltrace_debug) {
+ ret = ctf_visitor_print_xml(stderr, 0, &scanner->ast->root);
+ if (ret) {
+ fprintf(stderr, "[error] Error visiting AST for XML output\n");
+ goto end;
+ }
+ }
+
+ ret = ctf_visitor_semantic_check(stderr, 0, &scanner->ast->root);
+ if (ret) {
+ fprintf(stderr, "[error] Error in CTF semantic validation %d\n", ret);
+ goto end;
+ }
+ ret = ctf_visitor_construct_metadata(stderr, 0, &scanner->ast->root,
+ td, td->byte_order);
+ if (ret) {
+ fprintf(stderr, "[error] Error in CTF metadata constructor %d\n", ret);
+ goto end;
+ }
+end:
+ ctf_scanner_free(scanner);
+end_scanner_alloc:
+end_packet_read:
+ fclose(fp);
+ free(buf);
+end_stream:
+ close(metadata_stream->pos.fd);
+ if (ret)
+ g_free(metadata_stream);
+ return ret;
+}
+
+static
+struct ctf_event_definition *create_event_definitions(struct ctf_trace *td,
+ struct ctf_stream *stream,
+ struct ctf_event *event)
+{
+ struct ctf_event_definition *stream_event = g_new0(struct ctf_event_definition, 1);
+
+ if (event->context_decl) {
+ struct definition *definition =
+ event->context_decl->p.definition_new(&event->context_decl->p,
+ stream->parent_def_scope, 0, 0, "event.context");
+ if (!definition) {
+ goto error;
+ }
+ stream_event->event_context = container_of(definition,
+ struct definition_struct, p);
+ stream->parent_def_scope = stream_event->event_context->p.scope;
+ }
+ if (event->fields_decl) {
+ struct definition *definition =
+ event->fields_decl->p.definition_new(&event->fields_decl->p,
+ stream->parent_def_scope, 0, 0, "event.fields");
+ if (!definition) {
+ goto error;
+ }
+ stream_event->event_fields = container_of(definition,
+ struct definition_struct, p);
+ stream->parent_def_scope = stream_event->event_fields->p.scope;
+ }
+ return stream_event;
+
+error:
+ if (stream_event->event_fields)
+ definition_unref(&stream_event->event_fields->p);
+ if (stream_event->event_context)
+ definition_unref(&stream_event->event_context->p);
+ return NULL;
+}
+
+static
+int create_stream_definitions(struct ctf_trace *td, struct ctf_stream *stream)
+{
+ struct ctf_stream_declaration *stream_class;
+ int ret;
+ int i;
+
+ if (stream->stream_definitions_created)
+ return 0;
+
+ stream_class = stream->stream_class;
+
+ if (stream_class->packet_context_decl) {
+ struct definition *definition =
+ stream_class->packet_context_decl->p.definition_new(&stream_class->packet_context_decl->p,
+ stream->parent_def_scope, 0, 0, "stream.packet.context");
+ if (!definition) {
+ ret = -EINVAL;
+ goto error;
+ }
+ stream->stream_packet_context = container_of(definition,
+ struct definition_struct, p);
+ stream->parent_def_scope = stream->stream_packet_context->p.scope;
+ }
+ if (stream_class->event_header_decl) {
+ struct definition *definition =
+ stream_class->event_header_decl->p.definition_new(&stream_class->event_header_decl->p,
+ stream->parent_def_scope, 0, 0, "stream.event.header");
+ if (!definition) {
+ ret = -EINVAL;
+ goto error;
+ }
+ stream->stream_event_header =
+ container_of(definition, struct definition_struct, p);
+ stream->parent_def_scope = stream->stream_event_header->p.scope;
+ }
+ if (stream_class->event_context_decl) {
+ struct definition *definition =
+ stream_class->event_context_decl->p.definition_new(&stream_class->event_context_decl->p,
+ stream->parent_def_scope, 0, 0, "stream.event.context");
+ if (!definition) {
+ ret = -EINVAL;
+ goto error;
+ }
+ stream->stream_event_context =
+ container_of(definition, struct definition_struct, p);
+ stream->parent_def_scope = stream->stream_event_context->p.scope;
+ }
+ stream->events_by_id = g_ptr_array_new();
+ g_ptr_array_set_size(stream->events_by_id, stream_class->events_by_id->len);
+ for (i = 0; i < stream->events_by_id->len; i++) {
+ struct ctf_event *event = g_ptr_array_index(stream_class->events_by_id, i);
+ struct ctf_event_definition *stream_event;
+
+ if (!event)
+ continue;
+ stream_event = create_event_definitions(td, stream, event);
+ if (!stream_event)
+ goto error_event;
+ g_ptr_array_index(stream->events_by_id, i) = stream_event;
+ }
+ return 0;
+
+error_event:
+ for (i = 0; i < stream->events_by_id->len; i++) {
+ struct ctf_event_definition *stream_event = g_ptr_array_index(stream->events_by_id, i);
+ if (stream_event)
+ g_free(stream_event);
+ }
+ g_ptr_array_free(stream->events_by_id, TRUE);
+error:
+ if (stream->stream_event_context)
+ definition_unref(&stream->stream_event_context->p);
+ if (stream->stream_event_header)
+ definition_unref(&stream->stream_event_header->p);
+ if (stream->stream_packet_context)
+ definition_unref(&stream->stream_packet_context->p);
+ return ret;
+}
+
+
+static
+int create_stream_packet_index(struct ctf_trace *td,
+ struct ctf_file_stream *file_stream)
+{
+ struct ctf_stream_declaration *stream;
+ int len_index;
+ struct ctf_stream_pos *pos;
+ struct stat filestats;
+ struct packet_index packet_index;
+ int first_packet = 1;
+ int ret;
+
+ pos = &file_stream->pos;
+
+ ret = fstat(pos->fd, &filestats);
+ if (ret < 0)
+ return ret;
+
+ if (filestats.st_size < MAX_PACKET_HEADER_LEN / CHAR_BIT)
+ return -EINVAL;
+
+ for (pos->mmap_offset = 0; pos->mmap_offset < filestats.st_size; ) {
+ uint64_t stream_id = 0;
+
+ if (pos->base) {
+ /* unmap old base */
+ ret = munmap(pos->base, pos->packet_size / CHAR_BIT);
+ if (ret) {
+ fprintf(stderr, "[error] Unable to unmap old base: %s.\n",
+ strerror(errno));
+ return ret;
+ }
+ pos->base = NULL;
+ }
+ /* map new base. Need mapping length from header. */
+ pos->base = mmap(NULL, MAX_PACKET_HEADER_LEN / CHAR_BIT, PROT_READ,
+ MAP_PRIVATE, pos->fd, pos->mmap_offset);
+ pos->content_size = MAX_PACKET_HEADER_LEN; /* Unknown at this point */
+ pos->packet_size = MAX_PACKET_HEADER_LEN; /* Unknown at this point */
+ pos->offset = 0; /* Position of the packet header */
+
+ packet_index.offset = pos->mmap_offset;
+ packet_index.content_size = 0;
+ packet_index.packet_size = 0;
+ packet_index.timestamp_begin = 0;
+ packet_index.timestamp_end = 0;
+ packet_index.events_discarded = 0;
+
+ /* read and check header, set stream id (and check) */
+ if (file_stream->parent.trace_packet_header) {
+ /* Read packet header */
+ ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p);
+ if (ret)
+ return ret;
+ len_index = struct_declaration_lookup_field_index(file_stream->parent.trace_packet_header->declaration, g_quark_from_static_string("magic"));
+ if (len_index >= 0) {
+ struct definition *field;
+ uint64_t magic;
+
+ field = struct_definition_get_field_from_index(file_stream->parent.trace_packet_header, len_index);
+ magic = get_unsigned_int(field);
+ if (magic != CTF_MAGIC) {
+ fprintf(stderr, "[error] Invalid magic number 0x%" PRIX64 " at packet %u (file offset %zd).\n",
+ magic,
+ file_stream->pos.packet_index->len,
+ (ssize_t) pos->mmap_offset);
+ return -EINVAL;
+ }
+ }
+
+ /* check uuid */
+ len_index = struct_declaration_lookup_field_index(file_stream->parent.trace_packet_header->declaration, g_quark_from_static_string("uuid"));
+ if (len_index >= 0) {
+ struct definition_array *defarray;
+ struct definition *field;
+ uint64_t i;
+ uint8_t uuidval[BABELTRACE_UUID_LEN];
+
+ field = struct_definition_get_field_from_index(file_stream->parent.trace_packet_header, len_index);
+ assert(field->declaration->id == CTF_TYPE_ARRAY);
+ defarray = container_of(field, struct definition_array, p);
+ assert(array_len(defarray) == BABELTRACE_UUID_LEN);
+
+ for (i = 0; i < BABELTRACE_UUID_LEN; i++) {
+ struct definition *elem;
+
+ elem = array_index(defarray, i);
+ uuidval[i] = get_unsigned_int(elem);
+ }
+ ret = babeltrace_uuid_compare(td->uuid, uuidval);
+ if (ret) {
+ fprintf(stderr, "[error] Unique Universal Identifiers do not match.\n");
+ return -EINVAL;
+ }
+ }
+
+
+ len_index = struct_declaration_lookup_field_index(file_stream->parent.trace_packet_header->declaration, g_quark_from_static_string("stream_id"));
+ if (len_index >= 0) {
+ struct definition *field;
+
+ field = struct_definition_get_field_from_index(file_stream->parent.trace_packet_header, len_index);
+ stream_id = get_unsigned_int(field);
+ }
+ }
+
+ if (!first_packet && file_stream->parent.stream_id != stream_id) {
+ fprintf(stderr, "[error] Stream ID is changing within a stream.\n");
+ return -EINVAL;
+ }
+ if (first_packet) {
+ file_stream->parent.stream_id = stream_id;
+ if (stream_id >= td->streams->len) {
+ fprintf(stderr, "[error] Stream %" PRIu64 " is not declared in metadata.\n", stream_id);
+ return -EINVAL;
+ }
+ stream = g_ptr_array_index(td->streams, stream_id);
+ if (!stream) {
+ fprintf(stderr, "[error] Stream %" PRIu64 " is not declared in metadata.\n", stream_id);
+ return -EINVAL;
+ }
+ file_stream->parent.stream_class = stream;
+ ret = create_stream_definitions(td, &file_stream->parent);
+ if (ret)
+ return ret;
+ }
+ first_packet = 0;
+
+ if (file_stream->parent.stream_packet_context) {
+ /* Read packet context */
+ ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p);
+ if (ret)
+ return ret;
+ /* read content size from header */
+ len_index = struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("content_size"));
+ if (len_index >= 0) {
+ struct definition *field;
+
+ field = struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
+ packet_index.content_size = get_unsigned_int(field);
+ } else {
+ /* Use file size for packet size */
+ packet_index.content_size = filestats.st_size * CHAR_BIT;
+ }
+
+ /* read packet size from header */
+ len_index = struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("packet_size"));
+ if (len_index >= 0) {
+ struct definition *field;
+
+ field = struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
+ packet_index.packet_size = get_unsigned_int(field);
+ } else {
+ /* Use content size if non-zero, else file size */
+ packet_index.packet_size = packet_index.content_size ? : filestats.st_size * CHAR_BIT;
+ }
+
+ /* read timestamp begin from header */
+ len_index = struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("timestamp_begin"));
+ if (len_index >= 0) {
+ struct definition *field;
+
+ field = struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
+ packet_index.timestamp_begin = get_unsigned_int(field);
+ }
+
+ /* read timestamp end from header */
+ len_index = struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("timestamp_end"));
+ if (len_index >= 0) {
+ struct definition *field;
+
+ field = struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
+ packet_index.timestamp_end = get_unsigned_int(field);
+ }
+
+ /* read events discarded from header */
+ len_index = struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("events_discarded"));
+ if (len_index >= 0) {
+ struct definition *field;
+
+ field = struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
+ packet_index.events_discarded = get_unsigned_int(field);
+ }
+ } else {
+ /* Use file size for packet size */
+ packet_index.content_size = filestats.st_size * CHAR_BIT;
+ /* Use content size if non-zero, else file size */
+ packet_index.packet_size = packet_index.content_size ? : filestats.st_size * CHAR_BIT;
+ }
+
+ /* Validate content size and packet size values */
+ if (packet_index.content_size > packet_index.packet_size) {
+ fprintf(stderr, "[error] Content size (%" PRIu64 " bits) is larger than packet size (%" PRIu64 " bits).\n",
+ packet_index.content_size, packet_index.packet_size);
+ return -EINVAL;
+ }
+
+ if (packet_index.packet_size > ((uint64_t)filestats.st_size - packet_index.offset) * CHAR_BIT) {
+ fprintf(stderr, "[error] Packet size (%" PRIu64 " bits) is larger than remaining file size (%" PRIu64 " bits).\n",
+ packet_index.content_size, ((uint64_t)filestats.st_size - packet_index.offset) * CHAR_BIT);
+ return -EINVAL;
+ }
+
+ /* Save position after header and context */
+ packet_index.data_offset = pos->offset;
+
+ /* add index to packet array */
+ g_array_append_val(file_stream->pos.packet_index, packet_index);
+
+ pos->mmap_offset += packet_index.packet_size / CHAR_BIT;
+ }
+
+ /* Move pos back to beginning of file */
+ ctf_packet_seek(&pos->parent, 0, SEEK_SET); /* position for write */
+
+ return 0;
+}
+
+static
+int create_trace_definitions(struct ctf_trace *td, struct ctf_stream *stream)
+{
+ int ret;
+
+ if (td->packet_header_decl) {
+ struct definition *definition =
+ td->packet_header_decl->p.definition_new(&td->packet_header_decl->p,
+ stream->parent_def_scope, 0, 0, "trace.packet.header");
+ if (!definition) {
+ ret = -EINVAL;
+ goto error;
+ }
+ stream->trace_packet_header =
+ container_of(definition, struct definition_struct, p);
+ stream->parent_def_scope = stream->trace_packet_header->p.scope;
+ }
+
+ return 0;
+
+error:
+ return ret;
+}
+
+/*
+ * Note: many file streams can inherit from the same stream class
+ * description (metadata).
+ */
+static
+int ctf_open_file_stream_read(struct ctf_trace *td, const char *path, int flags,
+ void (*packet_seek)(struct stream_pos *pos, size_t index,
+ int whence))
+{
+ int ret;
+ struct ctf_file_stream *file_stream;
+
+ ret = openat(td->dirfd, path, flags);
+ if (ret < 0) {
+ perror("File stream openat()");
+ goto error;
+ }
+ file_stream = g_new0(struct ctf_file_stream, 1);
+
+ if (packet_seek) {
+ file_stream->pos.packet_seek = packet_seek;
+ } else {
+ fprintf(stderr, "[error] packet_seek function undefined.\n");
+ ret = -1;
+ goto error_def;
+ }
+
+ ctf_init_pos(&file_stream->pos, ret, flags);
+ ret = create_trace_definitions(td, &file_stream->parent);
+ if (ret)
+ goto error_def;
+ /*
+ * For now, only a single slock is supported.
+ */
+ file_stream->parent.current_clock = td->single_clock;
+ ret = create_stream_packet_index(td, file_stream);
+ if (ret)
+ goto error_index;
+ /* Add stream file to stream class */
+ g_ptr_array_add(file_stream->parent.stream_class->streams,
+ &file_stream->parent);
+ return 0;
+
+error_index:
+ if (file_stream->parent.trace_packet_header)
+ definition_unref(&file_stream->parent.trace_packet_header->p);
+error_def:
+ ctf_fini_pos(&file_stream->pos);
+ close(file_stream->pos.fd);
+ g_free(file_stream);
+error:
+ return ret;
+}
+
+static
+int ctf_open_trace_read(struct ctf_trace *td,
+ const char *path, int flags,
+ void (*packet_seek)(struct stream_pos *pos, size_t index,
+ int whence), FILE *metadata_fp)
+{
+ int ret;
+ struct dirent *dirent;
+ struct dirent *diriter;
+ size_t dirent_len;
+
+ td->flags = flags;
+
+ /* Open trace directory */
+ td->dir = opendir(path);
+ if (!td->dir) {
+ fprintf(stderr, "[error] Unable to open trace directory.\n");
+ ret = -ENOENT;
+ goto error;
+ }
+
+ td->dirfd = open(path, 0);
+ if (td->dirfd < 0) {
+ fprintf(stderr, "[error] Unable to open trace directory file descriptor.\n");
+ perror("Trace directory open");
+ ret = -errno;
+ goto error_dirfd;
+ }
+ strncpy(td->path, path, sizeof(td->path));
+ td->path[sizeof(td->path) - 1] = '\0';
+
+ /*
+ * Keep the metadata file separate.
+ */
+
+ ret = ctf_open_trace_metadata_read(td, packet_seek, metadata_fp);
+ if (ret) {
+ goto error_metadata;
+ }
+
+ /*
+ * Open each stream: for each file, try to open, check magic
+ * number, and get the stream ID to add to the right location in
+ * the stream array.
+ */
+
+ dirent_len = offsetof(struct dirent, d_name) +
+ fpathconf(td->dirfd, _PC_NAME_MAX) + 1;
+
+ dirent = malloc(dirent_len);
+
+ for (;;) {
+ ret = readdir_r(td->dir, dirent, &diriter);
+ if (ret) {
+ fprintf(stderr, "[error] Readdir error.\n");
+ goto readdir_error;
+ }
+ if (!diriter)
+ break;
+ /* Ignore hidden files, ., .. and metadata. */
+ if (!strncmp(diriter->d_name, ".", 1)
+ || !strcmp(diriter->d_name, "..")
+ || !strcmp(diriter->d_name, "metadata"))
+ continue;
+ ret = ctf_open_file_stream_read(td, diriter->d_name,
+ flags, packet_seek);
+ if (ret) {
+ fprintf(stderr, "[error] Open file stream error.\n");
+ goto readdir_error;
+ }
+ }
+
+ free(dirent);
+ return 0;
+
+readdir_error:
+ free(dirent);
+error_metadata:
+ close(td->dirfd);
+error_dirfd:
+ closedir(td->dir);
+error:
+ return ret;
+}
+
+static
+struct trace_descriptor *ctf_open_trace(const char *path, int flags,
+ void (*packet_seek)(struct stream_pos *pos, size_t index,
+ int whence), FILE *metadata_fp)
+{
+ struct ctf_trace *td;
+ int ret;
+
+ /*
+ * If packet_seek is NULL, we provide our default version.
+ */
+ if (!packet_seek)
+ packet_seek = ctf_packet_seek;
+
+ td = g_new0(struct ctf_trace, 1);
+
+ switch (flags & O_ACCMODE) {
+ case O_RDONLY:
+ if (!path) {
+ fprintf(stderr, "[error] Path missing for input CTF trace.\n");
+ goto error;
+ }
+ ret = ctf_open_trace_read(td, path, flags, packet_seek, metadata_fp);
+ if (ret)
+ goto error;
+ break;
+ case O_RDWR:
+ fprintf(stderr, "[error] Opening CTF traces for output is not supported yet.\n");
+ goto error;
+ default:
+ fprintf(stderr, "[error] Incorrect open flags.\n");
+ goto error;
+ }
+
+ return &td->parent;
+error:
+ g_free(td);
+ return NULL;
+}
+
+
+void ctf_init_mmap_pos(struct ctf_stream_pos *pos,
+ struct mmap_stream *mmap_info)
+{
+ pos->mmap_offset = 0;
+ pos->packet_size = 0;
+ pos->content_size = 0;
+ pos->content_size_loc = NULL;
+ pos->fd = mmap_info->fd;
+ pos->base = 0;
+ pos->offset = 0;
+ pos->dummy = false;
+ pos->cur_index = 0;
+ pos->packet_index = NULL;
+ pos->prot = PROT_READ;
+ pos->flags = MAP_PRIVATE;
+ pos->parent.rw_table = read_dispatch_table;
+ pos->parent.event_cb = ctf_read_event;
+}
+
+static
+int prepare_mmap_stream_definition(struct ctf_trace *td,
+ struct ctf_file_stream *file_stream)
+{
+ struct ctf_stream_declaration *stream;
+ uint64_t stream_id = 0;
+ int ret;
+
+ file_stream->parent.stream_id = stream_id;
+ if (stream_id >= td->streams->len) {
+ fprintf(stderr, "[error] Stream %" PRIu64 " is not declared "
+ "in metadata.\n", stream_id);
+ ret = -EINVAL;
+ goto end;
+ }
+ stream = g_ptr_array_index(td->streams, stream_id);
+ if (!stream) {
+ fprintf(stderr, "[error] Stream %" PRIu64 " is not declared "
+ "in metadata.\n", stream_id);
+ ret = -EINVAL;
+ goto end;
+ }
+ file_stream->parent.stream_class = stream;
+ ret = create_stream_definitions(td, &file_stream->parent);
+end:
+ return ret;
+}
+
+static
+int ctf_open_mmap_stream_read(struct ctf_trace *td,
+ struct mmap_stream *mmap_info,
+ void (*packet_seek)(struct stream_pos *pos, size_t index,
+ int whence))
+{
+ int ret;
+ struct ctf_file_stream *file_stream;
+
+ file_stream = g_new0(struct ctf_file_stream, 1);
+ ctf_init_mmap_pos(&file_stream->pos, mmap_info);
+
+ file_stream->pos.packet_seek = packet_seek;
+
+ ret = create_trace_definitions(td, &file_stream->parent);
+ if (ret) {
+ goto error_def;
+ }
+
+ ret = prepare_mmap_stream_definition(td, file_stream);
+ if (ret)
+ goto error_index;
+
+ /* Add stream file to stream class */
+ g_ptr_array_add(file_stream->parent.stream_class->streams,
+ &file_stream->parent);
+ return 0;
+
+error_index:
+ if (file_stream->parent.trace_packet_header)
+ definition_unref(&file_stream->parent.trace_packet_header->p);
+error_def:
+ g_free(file_stream);
+ return ret;
+}
+
+int ctf_open_mmap_trace_read(struct ctf_trace *td,
+ struct mmap_stream_list *mmap_list,
+ void (*packet_seek)(struct stream_pos *pos, size_t index,
+ int whence),
+ FILE *metadata_fp)
+{
+ int ret;
+ struct mmap_stream *mmap_info;
+
+ ret = ctf_open_trace_metadata_read(td, ctf_packet_seek, metadata_fp);
+ if (ret) {
+ goto error;
+ }
+
+ /*
+ * for each stream, try to open, check magic number, and get the
+ * stream ID to add to the right location in the stream array.
+ */
+ bt_list_for_each_entry(mmap_info, &mmap_list->head, list) {
+ ret = ctf_open_mmap_stream_read(td, mmap_info, packet_seek);
+ if (ret) {
+ fprintf(stderr, "[error] Open file mmap stream error.\n");
+ goto error;
+ }
+ }
+
+ return 0;
+
+error:
+ return ret;
+}
+
+static
+struct trace_descriptor *ctf_open_mmap_trace(
+ struct mmap_stream_list *mmap_list,
+ void (*packet_seek)(struct stream_pos *pos, size_t index,
+ int whence),
+ FILE *metadata_fp)
+{
+ struct ctf_trace *td;
+ int ret;
+
+ if (!metadata_fp) {
+ fprintf(stderr, "[error] No metadata file pointer associated, "
+ "required for mmap parsing\n");
+ goto error;
+ }
+ if (!packet_seek) {
+ fprintf(stderr, "[error] packet_seek function undefined.\n");
+ goto error;
+ }
+ td = g_new0(struct ctf_trace, 1);
+ ret = ctf_open_mmap_trace_read(td, mmap_list, packet_seek, metadata_fp);
+ if (ret)
+ goto error_free;
+
+ return &td->parent;
+
+error_free:
+ g_free(td);
+error:
+ return NULL;
+}
+
+static
+void ctf_close_file_stream(struct ctf_file_stream *file_stream)
+{
+ ctf_fini_pos(&file_stream->pos);
+ close(file_stream->pos.fd);
+}
+
+static
+void ctf_close_trace(struct trace_descriptor *tdp)
+{
+ struct ctf_trace *td = container_of(tdp, struct ctf_trace, parent);
+ int i;
+
+ if (td->streams) {
+ for (i = 0; i < td->streams->len; i++) {
+ struct ctf_stream_declaration *stream;
+ int j;
+
+ stream = g_ptr_array_index(td->streams, i);
+ if (!stream)
+ continue;
+ for (j = 0; j < stream->streams->len; j++) {
+ struct ctf_file_stream *file_stream;
+ file_stream = container_of(g_ptr_array_index(stream->streams, j), struct ctf_file_stream, parent);
+ ctf_close_file_stream(file_stream);
+ }
+
+ }
+ g_ptr_array_free(td->streams, TRUE);
+ }
+ closedir(td->dir);
+ g_free(td);
+}
+
+static
+void ctf_set_context(struct trace_descriptor *descriptor,
+ struct bt_context *ctx)
+{
+ struct ctf_trace *td = container_of(descriptor, struct ctf_trace,
+ parent);
+
+ td->ctx = ctx;
+}
+
+static
+void ctf_set_handle(struct trace_descriptor *descriptor,
+ struct bt_trace_handle *handle)
+{
+ struct ctf_trace *td = container_of(descriptor, struct ctf_trace,
+ parent);
+
+ td->handle = handle;
+}
+
+void __attribute__((constructor)) ctf_init(void)
{
int ret;
projects / babeltrace.git / blobdiff