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git.proxmox.com Git - mirror_ovs.git/blob - lib/backtrace.c
2 * Copyright (c) 2008, 2009, 2010, 2011, 2013 Nicira, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
20 #include "backtrace.h"
23 VLOG_DEFINE_THIS_MODULE(backtrace
);
28 backtrace_capture(struct backtrace
*b
)
30 void *frames
[BACKTRACE_MAX_FRAMES
];
33 b
->n_frames
= backtrace(frames
, BACKTRACE_MAX_FRAMES
);
34 for (i
= 0; i
< b
->n_frames
; i
++) {
35 b
->frames
[i
] = (uintptr_t) frames
[i
];
41 backtrace_capture(struct backtrace
*backtrace
)
43 backtrace
->n_frames
= 0;
48 backtrace_format(const struct backtrace
*b
, struct ds
*ds
)
53 ds_put_cstr(ds
, " (backtrace:");
54 for (i
= 0; i
< b
->n_frames
; i
++) {
55 ds_put_format(ds
, " 0x%08"PRIxPTR
, b
->frames
[i
]);
64 log_backtrace_at(const char *msg
, const char *where
)
67 struct ds ds
= DS_EMPTY_INITIALIZER
;
69 backtrace_capture(&b
);
71 ds_put_format(&ds
, "%s ", msg
);
74 ds_put_cstr(&ds
, where
);
75 VLOG_ERR("%s", backtrace_format(&b
, &ds
));