1 /* Linux-dependent part of branch trace support for GDB, and GDBserver.
3 Copyright (C) 2013-2014 Free Software Foundation, Inc.
5 Contributed by Intel Corp. <markus.t.metzger@intel.com>
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #ifndef LINUX_BTRACE_H
23 #define LINUX_BTRACE_H
25 #include "btrace-common.h"
29 #if HAVE_LINUX_PERF_EVENT_H
30 # include <linux/perf_event.h>
33 /* Branch trace target information per thread. */
34 struct btrace_target_info
36 #if HAVE_LINUX_PERF_EVENT_H
37 /* The Linux perf_event configuration for collecting the branch trace. */
38 struct perf_event_attr attr
;
40 /* The ptid of this thread. */
43 /* The mmap configuration mapping the branch trace perf_event buffer.
45 file .. the file descriptor
46 buffer .. the mmapped memory buffer
47 size .. the buffer's size in pages without the configuration page
48 data_head .. the data head from the last read */
52 unsigned long data_head
;
53 #endif /* HAVE_LINUX_PERF_EVENT_H */
55 /* The size of a pointer in bits for this thread.
56 The information is used to identify kernel addresses in order to skip
57 records from/to kernel space. */
61 /* See to_supports_btrace in target.h. */
62 extern int linux_supports_btrace (struct target_ops
*);
64 /* See to_enable_btrace in target.h. */
65 extern struct btrace_target_info
*linux_enable_btrace (ptid_t ptid
);
67 /* See to_disable_btrace in target.h. */
68 extern enum btrace_error
linux_disable_btrace (struct btrace_target_info
*ti
);
70 /* See to_read_btrace in target.h. */
71 extern enum btrace_error
linux_read_btrace (VEC (btrace_block_s
) **btrace
,
72 struct btrace_target_info
*btinfo
,
73 enum btrace_read_type type
);
75 #endif /* LINUX_BTRACE_H */
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