6 * Copyright 2011-2012 EfficiOS Inc. and Linux Foundation
8 * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
9 * Julien Desfossez <julien.desfossez@efficios.com>
11 * Permission is hereby granted, free of charge, to any person obtaining a copy
12 * of this software and associated documentation files (the "Software"), to deal
13 * in the Software without restriction, including without limitation the rights
14 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
15 * copies of the Software, and to permit persons to whom the Software is
16 * furnished to do so, subject to the following conditions:
18 * The above copyright notice and this permission notice shall be included in
19 * all copies or substantial portions of the Software.
22 #include <babeltrace/babeltrace.h>
23 #include <babeltrace/context.h>
24 #include <babeltrace/context-internal.h>
25 #include <babeltrace/trace-handle.h>
26 #include <babeltrace/trace-handle-internal.h>
27 #include <babeltrace/trace-collection.h>
28 #include <babeltrace/format.h>
32 #include <fcntl.h> /* For O_RDONLY */
34 /* TODO ybrosseau: should be hidden in the CTF format */
35 #include <babeltrace/ctf/types.h> /* for ctf_move_pos_slow */
39 struct bt_context
*bt_context_create(void)
41 struct bt_context
*ctx
;
43 ctx
= g_new0(struct bt_context
, 1);
45 /* Negative handle id are errors. */
46 ctx
->last_trace_handle_id
= 0;
48 /* Instanciate the trace handle container */
49 ctx
->trace_handles
= g_hash_table_new_full(g_direct_hash
,
51 (GDestroyNotify
) bt_trace_handle_destroy
);
53 ctx
->tc
= g_new0(struct trace_collection
, 1);
54 init_trace_collection(ctx
->tc
);
59 int bt_context_add_trace(struct bt_context
*ctx
, const char *path
,
60 const char *format_str
)
62 struct trace_descriptor
*td
;
64 struct bt_trace_handle
*handle
;
66 fmt
= bt_lookup_format(g_quark_from_string(format_str
));
67 td
= fmt
->open_trace(path
, O_RDONLY
,
68 ctf_move_pos_slow
, NULL
);
70 fprintf(stderr
, "[error] [Context] Cannot open_trace of the format %s .\n\n",
75 /* Create an handle for the trace */
76 handle
= bt_trace_handle_create(ctx
);
78 fprintf(stderr
, "[error] [Context] Creating trace handle %s .\n\n",
84 strncpy(handle
->path
, path
, PATH_MAX
);
85 handle
->path
[PATH_MAX
- 1] = '\0';
87 /* Add new handle to container */
88 g_hash_table_insert(ctx
->trace_handles
,
89 (gpointer
) (unsigned long) handle
->id
,
91 return trace_collection_add(ctx
->tc
, td
);
95 * Unable to open toplevel: failure.
96 * Unable to open some subdirectory or file: warn and continue;
98 int bt_context_add_traces_recursive(struct bt_context
*ctx
, const char *path
,
99 const char *format_str
)
104 char lpath
[PATH_MAX
];
105 char * const paths
[2] = { lpath
, NULL
};
109 * Need to copy path, because fts_open can change it.
110 * It is the pointer array, not the strings, that are constant.
112 strncpy(lpath
, path
, PATH_MAX
);
113 lpath
[PATH_MAX
- 1] = '\0';
115 tree
= fts_open(paths
, FTS_NOCHDIR
| FTS_LOGICAL
, 0);
117 fprintf(stderr
, "[error] [Context] Cannot traverse \"%s\" for reading.\n",
122 trace_ids
= g_array_new(FALSE
, TRUE
, sizeof(int));
124 while ((node
= fts_read(tree
))) {
127 if (!(node
->fts_info
& FTS_D
))
130 dirfd
= open(node
->fts_accpath
, 0);
132 fprintf(stderr
, "[error] [Context] Unable to open trace "
133 "directory file descriptor.\n");
137 metafd
= openat(dirfd
, "metadata", O_RDONLY
);
158 trace_id
= bt_context_add_trace(ctx
,
159 node
->fts_accpath
, format_str
);
161 fprintf(stderr
, "[error] [Context] opening trace \"%s\" from %s "
162 "for reading.\n", node
->fts_accpath
, path
);
166 g_array_append_val(trace_ids
, trace_id
);
170 g_array_free(trace_ids
, TRUE
);
177 void bt_context_remove_trace(struct bt_context
*ctx
, int handle_id
)
179 struct bt_trace_handle
*handle
;
181 handle
= g_hash_table_lookup(ctx
->trace_handles
,
182 (gpointer
) (unsigned long) handle_id
);
183 assert(handle
!= NULL
);
185 /* Remove from containers */
186 trace_collection_remove(ctx
->tc
, handle
->td
);
187 g_hash_table_remove(ctx
->trace_handles
,
188 (gpointer
) (unsigned long) handle_id
);
190 /* Close the trace */
191 handle
->format
->close_trace(handle
->td
);
193 /* Destory the handle */
194 bt_trace_handle_destroy(handle
);
198 void bt_context_destroy(struct bt_context
*ctx
)
200 finalize_trace_collection(ctx
->tc
);
202 /* Remote all traces. The g_hash_table_destroy will call
203 * bt_trace_handle_destroy on each elements.
205 g_hash_table_destroy(ctx
->trace_handles
);
207 /* ctx->tc should always be valid */
208 assert(ctx
->tc
!= NULL
);
213 void bt_context_get(struct bt_context
*ctx
)
218 void bt_context_put(struct bt_context
*ctx
)
221 if (ctx
->refcount
== 0)
222 bt_context_destroy(ctx
);
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