+++ /dev/null
-/*
- * babeltrace-lib.c
- *
- * Babeltrace Trace Converter Library
- *
- * 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
- * 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.
- */
-
-#include <stdlib.h>
-#include <errno.h>
-#include <stdio.h>
-#include <inttypes.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>
-
-int babeltrace_verbose, babeltrace_debug;
-
-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;
- int flags;
- struct bt_dependencies *depends;
- struct bt_dependencies *weak_depends;
- struct bt_dependencies *provides;
- enum bt_cb_ret (*callback)(struct bt_ctf_data *ctf_data,
- void *private_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_callbacks */
- 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
-struct bt_dependencies *_babeltrace_dependencies_create(const char *first,
- va_list ap)
-{
- const char *iter;
- struct bt_dependencies *dep;
-
- 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;
-}
-
-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;
-}
-
-/*
- * babeltrace_iter_add_callback: Add a callback to iterator.
- */
-int babeltrace_iter_add_callback(struct babeltrace_iter *iter,
- bt_event_name event, void *private_data, int flags,
- enum bt_cb_ret (*callback)(struct bt_ctf_data *ctf_data,
- void *private_data),
- struct bt_dependencies *depends,
- struct bt_dependencies *weak_depends,
- struct bt_dependencies *provides)
-{
- int i, stream_id;
- gpointer *event_id_ptr;
- unsigned long event_id;
- 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);
-
- for (stream_id = 0; stream_id < tin->streams->len; stream_id++) {
- struct ctf_stream_class *stream;
- struct bt_stream_callbacks *bt_stream_cb = NULL;
- struct bt_callback_chain *bt_chain = NULL;
- struct bt_callback new_callback;
-
- stream = g_ptr_array_index(tin->streams, stream_id);
-
- if (stream_id >= iter->callbacks->len) {
- g_array_set_size(iter->callbacks, stream->stream_id + 1);
- }
- bt_stream_cb = &g_array_index(iter->callbacks,
- struct bt_stream_callbacks, stream->stream_id);
- if (!bt_stream_cb->per_id_callbacks) {
- bt_stream_cb->per_id_callbacks = g_array_new(FALSE, TRUE,
- sizeof(struct bt_callback_chain));
- }
-
- if (event) {
- /* find the event id */
- event_id_ptr = g_hash_table_lookup(stream->event_quark_to_id,
- (gconstpointer) (unsigned long) event);
- /* event not found in this stream class */
- if (!event_id_ptr) {
- printf("event not found\n");
- continue;
- }
- event_id = (uint64_t)(unsigned long) *event_id_ptr;
-
- /* find or create the bt_callback_chain for this event */
- if (event_id >= bt_stream_cb->per_id_callbacks->len) {
- g_array_set_size(bt_stream_cb->per_id_callbacks, event_id + 1);
- }
- bt_chain = &g_array_index(bt_stream_cb->per_id_callbacks,
- struct bt_callback_chain, event_id);
- if (!bt_chain->callback) {
- bt_chain->callback = g_array_new(FALSE, TRUE,
- sizeof(struct bt_callback));
- }
- } else {
- /* callback for all events */
- if (!iter->main_callbacks.callback) {
- iter->main_callbacks.callback = g_array_new(FALSE, TRUE,
- sizeof(struct bt_callback));
- }
- bt_chain = &iter->main_callbacks;
- }
-
- new_callback.private_data = private_data;
- new_callback.flags = flags;
- new_callback.callback = callback;
- new_callback.depends = depends;
- new_callback.weak_depends = weak_depends;
- new_callback.provides = provides;
-
- /* TODO : take care of priority, for now just FIFO */
- g_array_append_val(bt_chain->callback, new_callback);
- }
- }
-
- return 0;
-}
-
-static int stream_read_event(struct ctf_file_stream *sin)
-{
- int ret;
-
- 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;
- }
- 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:
- file_stream->pos.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 */
- }
-
- 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;
-
- 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;
- iter->callbacks = g_array_new(0, 1, sizeof(struct bt_stream_callbacks));
- iter->recalculate_dep_graph = 0;
- iter->main_callbacks.callback = NULL;
- iter->dep_gc = g_ptr_array_new();
-
- 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 iter;
-
-error:
- heap_free(iter->stream_heap);
-error_heap_init:
- g_free(iter->stream_heap);
- free(iter);
-error_malloc:
- return NULL;
-}
-
-void babeltrace_iter_destroy(struct babeltrace_iter *iter)
-{
- struct bt_stream_callbacks *bt_stream_cb;
- struct bt_callback_chain *bt_chain;
- int i, j;
-
- heap_free(iter->stream_heap);
- g_free(iter->stream_heap);
-
- /* free all events callbacks */
- if (iter->main_callbacks.callback)
- g_array_free(iter->main_callbacks.callback, TRUE);
-
- /* free per-event callbacks */
- for (i = 0; i < iter->callbacks->len; i++) {
- bt_stream_cb = &g_array_index(iter->callbacks,
- struct bt_stream_callbacks, i);
- if (!bt_stream_cb || !bt_stream_cb->per_id_callbacks)
- continue;
- for (j = 0; j < bt_stream_cb->per_id_callbacks->len; j++) {
- bt_chain = &g_array_index(bt_stream_cb->per_id_callbacks,
- struct bt_callback_chain, j);
- if (bt_chain->callback) {
- g_array_free(bt_chain->callback, TRUE);
- }
- }
- g_array_free(bt_stream_cb->per_id_callbacks, TRUE);
- }
-
- free(iter);
-}
-
-int babeltrace_iter_next(struct babeltrace_iter *iter)
-{
- struct ctf_file_stream *file_stream, *removed;
- int ret;
-
- file_stream = heap_maximum(iter->stream_heap);
- if (!file_stream) {
- /* end of file for all streams */
- ret = 0;
- goto end;
- }
-
- 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);
-
-end:
- return ret;
-}
-
-static
-struct ctf_stream_event *extract_ctf_stream_event(struct ctf_stream *stream)
-{
- struct ctf_stream_class *stream_class = stream->stream_class;
- struct ctf_event *event_class;
- struct ctf_stream_event *event;
- uint64_t id = stream->event_id;
-
- if (id >= stream_class->events_by_id->len) {
- fprintf(stdout, "[error] Event id %" PRIu64 " is outside range.\n", id);
- return NULL;
- }
- event = g_ptr_array_index(stream->events_by_id, id);
- if (!event) {
- fprintf(stdout, "[error] Event id %" PRIu64 " is unknown.\n", id);
- return NULL;
- }
- 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 NULL;
- }
-
- return event;
-}
-
-static
-void process_callbacks(struct babeltrace_iter *iter,
- struct ctf_stream *stream)
-{
- struct bt_stream_callbacks *bt_stream_cb;
- struct bt_callback_chain *bt_chain;
- struct bt_callback *cb;
- int i;
- enum bt_cb_ret ret;
- struct bt_ctf_data ctf_data;
-
- ctf_data.event = extract_ctf_stream_event(stream);
- ctf_data.stream = stream;
-
- /* process all events callback first */
- if (iter->main_callbacks.callback) {
- for (i = 0; i < iter->main_callbacks.callback->len; i++) {
- cb = &g_array_index(iter->main_callbacks.callback, struct bt_callback, i);
- if (!cb)
- goto end;
- ret = cb->callback(&ctf_data, cb->private_data);
- switch (ret) {
- case BT_CB_OK_STOP:
- case BT_CB_ERROR_STOP:
- goto end;
- default:
- break;
- }
- }
- }
-
- /* process per event callbacks */
- bt_stream_cb = &g_array_index(iter->callbacks,
- struct bt_stream_callbacks, stream->stream_id);
- if (!bt_stream_cb || !bt_stream_cb->per_id_callbacks)
- goto end;
-
- if (stream->event_id > bt_stream_cb->per_id_callbacks->len)
- goto end;
- bt_chain = &g_array_index(bt_stream_cb->per_id_callbacks,
- struct bt_callback_chain, stream->event_id);
- if (!bt_chain || !bt_chain->callback)
- goto end;
-
- for (i = 0; i < bt_chain->callback->len; i++) {
- cb = &g_array_index(bt_chain->callback, struct bt_callback, i);
- if (!cb)
- goto end;
- ret = cb->callback(&ctf_data, cb->private_data);
- switch (ret) {
- case BT_CB_OK_STOP:
- case BT_CB_ERROR_STOP:
- goto end;
- default:
- break;
- }
- }
-
-end:
- return;
-}
-
-int babeltrace_iter_read_event(struct babeltrace_iter *iter,
- struct ctf_stream **stream,
- struct ctf_stream_event **event)
-{
- struct ctf_file_stream *file_stream;
- int ret = 0;
-
- 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);
-
- if ((*stream)->stream_id > iter->callbacks->len)
- goto end;
-
- process_callbacks(iter, *stream);
-
-end:
- return ret;
-}
-
-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;
-
- 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;
-}
-
-static
-void __attribute__((constructor)) init_babeltrace_lib(void)
-{
- if (getenv("BABELTRACE_VERBOSE"))
- babeltrace_verbose = 1;
- if (getenv("BABELTRACE_DEBUG"))
- babeltrace_debug = 1;
-}
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