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7c97f91e MM |
1 | /* Linux-dependent part of branch trace support for GDB, and GDBserver. |
2 | ||
ecd75fc8 | 3 | Copyright (C) 2013-2014 Free Software Foundation, Inc. |
7c97f91e MM |
4 | |
5 | Contributed by Intel Corp. <markus.t.metzger@intel.com> | |
6 | ||
7 | This file is part of GDB. | |
8 | ||
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. | |
13 | ||
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. | |
18 | ||
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/>. */ | |
21 | ||
22 | #ifndef LINUX_BTRACE_H | |
23 | #define LINUX_BTRACE_H | |
24 | ||
25 | #include "btrace-common.h" | |
26 | #include "config.h" | |
27 | #include "vec.h" | |
28 | #include "ptid.h" | |
29 | #include <stddef.h> | |
30 | #include <stdint.h> | |
31 | ||
32 | #if HAVE_LINUX_PERF_EVENT_H | |
33 | # include <linux/perf_event.h> | |
34 | #endif | |
35 | ||
36 | /* Branch trace target information per thread. */ | |
37 | struct btrace_target_info | |
38 | { | |
39 | #if HAVE_LINUX_PERF_EVENT_H | |
40 | /* The Linux perf_event configuration for collecting the branch trace. */ | |
41 | struct perf_event_attr attr; | |
42 | ||
43 | /* The ptid of this thread. */ | |
44 | ptid_t ptid; | |
45 | ||
46 | /* The mmap configuration mapping the branch trace perf_event buffer. | |
47 | ||
48 | file .. the file descriptor | |
49 | buffer .. the mmapped memory buffer | |
50 | size .. the buffer's size in pages without the configuration page | |
51 | data_head .. the data head from the last read */ | |
52 | int file; | |
53 | void *buffer; | |
54 | size_t size; | |
55 | unsigned long data_head; | |
56 | #endif /* HAVE_LINUX_PERF_EVENT_H */ | |
57 | ||
58 | /* The size of a pointer in bits for this thread. | |
59 | The information is used to identify kernel addresses in order to skip | |
60 | records from/to kernel space. */ | |
61 | int ptr_bits; | |
62 | }; | |
63 | ||
969c39fb | 64 | /* See to_supports_btrace in target.h. */ |
46917d26 | 65 | extern int linux_supports_btrace (struct target_ops *); |
7c97f91e | 66 | |
969c39fb | 67 | /* See to_enable_btrace in target.h. */ |
7c97f91e MM |
68 | extern struct btrace_target_info *linux_enable_btrace (ptid_t ptid); |
69 | ||
969c39fb MM |
70 | /* See to_disable_btrace in target.h. */ |
71 | extern enum btrace_error linux_disable_btrace (struct btrace_target_info *ti); | |
7c97f91e | 72 | |
969c39fb MM |
73 | /* See to_read_btrace in target.h. */ |
74 | extern enum btrace_error linux_read_btrace (VEC (btrace_block_s) **btrace, | |
75 | struct btrace_target_info *btinfo, | |
76 | enum btrace_read_type type); | |
7c97f91e MM |
77 | |
78 | #endif /* LINUX_BTRACE_H */ |