*
* Babeltrace Trace Converter Library
*
- * 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 <errno.h>
#include <stdio.h>
#include <inttypes.h>
-#include <babeltrace/babeltrace.h>
+#include <babeltrace/babeltrace-internal.h>
#include <babeltrace/format.h>
#include <babeltrace/ctf/types.h>
#include <babeltrace/ctf/metadata.h>
#include <babeltrace/ctf-text/types.h>
+#include <babeltrace/prio_heap.h>
+#include <babeltrace/babeltrace.h>
+#include <babeltrace/types.h>
+#include <babeltrace/ctf/types.h>
+#include <babeltrace/ctf-ir/metadata.h>
+#include <stdarg.h>
+
+struct stream_saved_pos {
+ /*
+ * Use file_stream pointer to check if the trace collection we
+ * restore to match the one we saved from, for each stream.
+ */
+ struct ctf_file_stream *file_stream;
+ size_t cur_index; /* current index in packet index */
+ ssize_t offset; /* offset from base, in bits. EOF for end of file. */
+};
+
+struct babeltrace_saved_pos {
+ struct trace_collection *tc;
+ GArray *stream_saved_pos; /* Contains struct stream_saved_pos */
+};
+
+struct bt_callback {
+ int prio; /* Callback order priority. Lower first. Dynamically assigned from dependency graph. */
+ void *private_data;
+ enum bt_cb_ret (*callback)(void *private_data, void *caller_data);
+};
+
+struct bt_callback_chain {
+ GArray *callback; /* Array of struct bt_callback, ordered by priority */
+};
+
+/*
+ * per id callbacks need to be per stream class because event ID vs
+ * event name mapping can vary from stream to stream.
+ */
+struct bt_stream_callbacks {
+ GArray *per_id_callbacks; /* Array of struct bt_callback_chain */
+};
+
+/*
+ * struct babeltrace_iter: data structure representing an iterator on a trace
+ * collection.
+ */
+struct babeltrace_iter {
+ struct ptr_heap *stream_heap;
+ struct trace_collection *tc;
+ struct trace_collection_pos *end_pos;
+ GArray *callbacks; /* Array of struct bt_stream_hooks */
+ struct bt_callback_chain main_callbacks; /* For all events */
+ /*
+ * Flag indicating if dependency graph needs to be recalculated.
+ * Set by babeltrace_iter_add_callback(), and checked (and
+ * cleared) by upon entry into babeltrace_iter_read_event().
+ * babeltrace_iter_read_event() is responsible for calling dep
+ * graph calculation if it sees this flag set.
+ */
+ int recalculate_dep_graph;
+ /*
+ * Array of pointers to struct bt_dependencies, for garbage
+ * collection. We're not using a linked list here because each
+ * struct bt_dependencies can belong to more than one
+ * babeltrace_iter.
+ */
+ GPtrArray *dep_gc;
+};
+
+struct bt_dependencies {
+ GArray *deps; /* Array of GQuarks */
+ int refcount; /* free when decremented to 0 */
+};
static
-int convert_event(struct ctf_text_stream_pos *sout,
- struct ctf_file_stream *sin)
+struct bt_dependencies *_babeltrace_dependencies_create(const char *first,
+ va_list ap)
{
- struct ctf_stream *stream_class = sin->stream;
- struct ctf_event *event_class;
- uint64_t id = 0;
- int len_index;
-
- if (sin->pos.offset == -EOF)
- return -EOF;
-
- /* Hide event payload struct brackets */
- sout->depth = -1;
-
- /* Read and print event header */
- if (stream_class->event_header) {
- generic_rw(&sin->pos.parent, &stream_class->event_header->p);
-
- /* lookup event id */
- len_index = struct_declaration_lookup_field_index(stream_class->event_header_decl,
- g_quark_from_static_string("id"));
- if (len_index >= 0) {
- struct definition_integer *defint;
- struct field *field;
-
- field = struct_definition_get_field_from_index(stream_class->event_header, len_index);
- assert(field->definition->declaration->id == CTF_TYPE_INTEGER);
- defint = container_of(field->definition, struct definition_integer, p);
- assert(defint->declaration->signedness == FALSE);
- id = defint->value._unsigned; /* set id */
- }
+ const char *iter;
+ struct bt_dependencies *dep;
- generic_rw(&sout->parent, &stream_class->event_header->p);
+ dep = g_new0(struct bt_dependencies, 1);
+ dep->refcount = 1;
+ dep->deps = g_array_new(FALSE, TRUE, sizeof(GQuark));
+ iter = first;
+ while (iter) {
+ GQuark q = g_quark_from_string(iter);
+ g_array_append_val(dep->deps, q);
+ iter = va_arg(ap, const char *);
}
+ return dep;
+}
- /* Read and print stream-declared event context */
- if (stream_class->event_context) {
- generic_rw(&sin->pos.parent, &stream_class->event_context->p);
- generic_rw(&sout->parent, &stream_class->event_context->p);
- }
+struct bt_dependencies *babeltrace_dependencies_create(const char *first, ...)
+{
+ va_list ap;
+ struct bt_dependencies *deps;
+
+ va_start(ap, first);
+ deps = _babeltrace_dependencies_create(first, ap);
+ va_end(ap);
+ return deps;
+}
+
+static int stream_read_event(struct ctf_file_stream *sin)
+{
+ int ret;
- if (id >= stream_class->events_by_id->len) {
- fprintf(stdout, "[error] Event id %" PRIu64 " is outside range.\n", id);
- return -EINVAL;
+ ret = sin->pos.parent.event_cb(&sin->pos.parent, &sin->parent);
+ if (ret == EOF)
+ return EOF;
+ else if (ret) {
+ fprintf(stdout, "[error] Reading event failed.\n");
+ return ret;
}
- event_class = g_ptr_array_index(stream_class->events_by_id, id);
- if (!event_class) {
- fprintf(stdout, "[error] Event id %" PRIu64 " is unknown.\n", id);
- return -EINVAL;
+ return 0;
+}
+
+/*
+ * returns true if a < b, false otherwise.
+ */
+int stream_compare(void *a, void *b)
+{
+ struct ctf_file_stream *s_a = a, *s_b = b;
+
+ if (s_a->parent.timestamp < s_b->parent.timestamp)
+ return 1;
+ else
+ return 0;
+}
+
+/*
+ * babeltrace_filestream_seek: seek a filestream to given position.
+ *
+ * The stream_id parameter is only useful for BT_SEEK_RESTORE.
+ */
+static int babeltrace_filestream_seek(struct ctf_file_stream *file_stream,
+ const struct trace_collection_pos *begin_pos,
+ unsigned long stream_id)
+{
+ int ret = 0;
+
+ switch (begin_pos->type) {
+ case BT_SEEK_CUR:
+ /*
+ * just insert into the heap we should already know
+ * the timestamps
+ */
+ break;
+ case BT_SEEK_BEGIN:
+ ctf_move_pos_slow(&file_stream->pos, 0, SEEK_SET);
+ ret = stream_read_event(file_stream);
+ break;
+ case BT_SEEK_TIME:
+ case BT_SEEK_RESTORE:
+ case BT_SEEK_END:
+ default:
+ assert(0); /* Not yet defined */
}
- /* Read and print event-declared event context */
- if (event_class->context) {
- generic_rw(&sin->pos.parent, &event_class->context->p);
- generic_rw(&sout->parent, &event_class->context->p);
+ return ret;
+}
+
+/*
+ * babeltrace_iter_seek: seek iterator to given position.
+ */
+int babeltrace_iter_seek(struct babeltrace_iter *iter,
+ const struct trace_collection_pos *begin_pos)
+{
+ int i, stream_id;
+ int ret = 0;
+ struct trace_collection *tc = iter->tc;
+
+ for (i = 0; i < tc->array->len; i++) {
+ struct ctf_trace *tin;
+ struct trace_descriptor *td_read;
+
+ td_read = g_ptr_array_index(tc->array, i);
+ tin = container_of(td_read, struct ctf_trace, parent);
+
+ /* Populate heap with each stream */
+ for (stream_id = 0; stream_id < tin->streams->len;
+ stream_id++) {
+ struct ctf_stream_class *stream;
+ int filenr;
+
+ stream = g_ptr_array_index(tin->streams, stream_id);
+ for (filenr = 0; filenr < stream->streams->len;
+ filenr++) {
+ struct ctf_file_stream *file_stream;
+
+ file_stream = g_ptr_array_index(stream->streams,
+ filenr);
+ ret = babeltrace_filestream_seek(file_stream, begin_pos,
+ stream_id);
+ if (ret < 0)
+ goto end;
+ }
+ }
}
+end:
+ return ret;
+}
+
+struct babeltrace_iter *babeltrace_iter_create(struct trace_collection *tc,
+ struct trace_collection_pos *begin_pos,
+ struct trace_collection_pos *end_pos)
+{
+ int i, stream_id;
+ int ret = 0;
+ struct babeltrace_iter *iter;
- /* Read and print event payload */
- if (event_class->fields) {
- generic_rw(&sin->pos.parent, &event_class->fields->p);
- generic_rw(&sout->parent, &event_class->fields->p);
+ iter = malloc(sizeof(struct babeltrace_iter));
+ if (!iter)
+ goto error_malloc;
+ iter->stream_heap = g_new(struct ptr_heap, 1);
+ iter->tc = tc;
+ iter->end_pos = end_pos;
+
+ ret = heap_init(iter->stream_heap, 0, stream_compare);
+ if (ret < 0)
+ goto error_heap_init;
+
+ for (i = 0; i < tc->array->len; i++) {
+ struct ctf_trace *tin;
+ struct trace_descriptor *td_read;
+
+ td_read = g_ptr_array_index(tc->array, i);
+ tin = container_of(td_read, struct ctf_trace, parent);
+
+ /* Populate heap with each stream */
+ for (stream_id = 0; stream_id < tin->streams->len;
+ stream_id++) {
+ struct ctf_stream_class *stream;
+ int filenr;
+
+ stream = g_ptr_array_index(tin->streams, stream_id);
+ if (!stream)
+ continue;
+ for (filenr = 0; filenr < stream->streams->len;
+ filenr++) {
+ struct ctf_file_stream *file_stream;
+
+ file_stream = g_ptr_array_index(stream->streams,
+ filenr);
+
+ if (begin_pos) {
+ ret = babeltrace_filestream_seek(file_stream, begin_pos,
+ stream_id);
+ if (ret == EOF) {
+ ret = 0;
+ continue;
+ } else if (ret) {
+ goto error;
+ }
+ }
+ /* Add to heap */
+ ret = heap_insert(iter->stream_heap, file_stream);
+ if (ret)
+ goto error;
+ }
+ }
}
- return 0;
+ return iter;
+
+error:
+ heap_free(iter->stream_heap);
+error_heap_init:
+ g_free(iter->stream_heap);
+ free(iter);
+error_malloc:
+ return NULL;
}
-static
-int convert_stream(struct ctf_text_stream_pos *sout,
- struct ctf_file_stream *sin)
+void babeltrace_iter_destroy(struct babeltrace_iter *iter)
+{
+ heap_free(iter->stream_heap);
+ g_free(iter->stream_heap);
+ free(iter);
+}
+
+int babeltrace_iter_next(struct babeltrace_iter *iter)
{
+ struct ctf_file_stream *file_stream, *removed;
int ret;
- /* For each event, print header, context, payload */
- /* TODO: order events by timestamps across streams */
- for (;;) {
- ret = convert_event(sout, sin);
- if (ret == -EOF)
- break;
- else if (ret) {
- fprintf(stdout, "[error] Printing event failed.\n");
- goto error;
- }
+ file_stream = heap_maximum(iter->stream_heap);
+ if (!file_stream) {
+ /* end of file for all streams */
+ ret = 0;
+ goto end;
}
- return 0;
+ ret = stream_read_event(file_stream);
+ if (ret == EOF) {
+ removed = heap_remove(iter->stream_heap);
+ assert(removed == file_stream);
+ ret = 0;
+ goto end;
+ } else if (ret) {
+ goto end;
+ }
+ /* Reinsert the file stream into the heap, and rebalance. */
+ removed = heap_replace_max(iter->stream_heap, file_stream);
+ assert(removed == file_stream);
-error:
+end:
return ret;
}
-int convert_trace(struct trace_descriptor *td_write,
- struct trace_descriptor *td_read)
+int babeltrace_iter_read_event(struct babeltrace_iter *iter,
+ struct ctf_stream **stream,
+ struct ctf_stream_event **event)
{
- struct ctf_trace *tin = container_of(td_read, struct ctf_trace, parent);
- struct ctf_text_stream_pos *sout =
- container_of(td_write, struct ctf_text_stream_pos, trace_descriptor);
- int stream_id, filenr;
- int ret;
+ struct ctf_file_stream *file_stream;
+ int ret = 0;
- /* For each stream (TODO: order events by timestamp) */
- for (stream_id = 0; stream_id < tin->streams->len; stream_id++) {
- struct ctf_stream *stream = g_ptr_array_index(tin->streams, stream_id);
-
- if (!stream)
- continue;
- for (filenr = 0; filenr < stream->files->len; filenr++) {
- struct ctf_file_stream *file_stream = g_ptr_array_index(stream->files, filenr);
- ret = convert_stream(sout, file_stream);
- if (ret) {
- fprintf(stdout, "[error] Printing stream %d failed.\n", stream_id);
- goto error;
- }
- }
+ file_stream = heap_maximum(iter->stream_heap);
+ if (!file_stream) {
+ /* end of file for all streams */
+ ret = EOF;
+ goto end;
}
+ *stream = &file_stream->parent;
+ *event = g_ptr_array_index((*stream)->events_by_id, (*stream)->event_id);
+end:
+ return ret;
+}
- return 0;
+int convert_trace(struct trace_descriptor *td_write,
+ struct trace_collection *trace_collection_read)
+{
+ struct babeltrace_iter *iter;
+ struct ctf_stream *stream;
+ struct ctf_stream_event *event;
+ struct ctf_text_stream_pos *sout;
+ struct trace_collection_pos begin_pos;
+ int ret = 0;
-error:
+ sout = container_of(td_write, struct ctf_text_stream_pos,
+ trace_descriptor);
+
+ begin_pos.type = BT_SEEK_BEGIN;
+ iter = babeltrace_iter_create(trace_collection_read, &begin_pos, NULL);
+ while (babeltrace_iter_read_event(iter, &stream, &event) == 0) {
+ ret = sout->parent.event_cb(&sout->parent, stream);
+ if (ret) {
+ fprintf(stdout, "[error] Writing event failed.\n");
+ goto end;
+ }
+ ret = babeltrace_iter_next(iter);
+ if (ret < 0)
+ goto end;
+ }
+end:
+ babeltrace_iter_destroy(iter);
return ret;
}
projects / babeltrace.git / blobdiff