1 /* Linux-dependent part of branch trace support for GDB, and GDBserver.
3 Copyright (C) 2013-2015 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"
27 #if HAVE_LINUX_PERF_EVENT_H
28 # include <linux/perf_event.h>
33 #if HAVE_LINUX_PERF_EVENT_H
34 /* A Linux perf event buffer. */
35 struct perf_event_buffer
37 /* The mapped memory. */
40 /* The size of the mapped memory in bytes. */
43 /* A pointer to the data_head field for this buffer. */
44 volatile __u64
*data_head
;
46 /* The data_head value from the last read. */
50 /* Branch trace target information for BTS tracing. */
51 struct btrace_tinfo_bts
53 /* The Linux perf_event configuration for collecting the branch trace. */
54 struct perf_event_attr attr
;
56 /* The perf event file. */
59 /* The perf event configuration page. */
60 volatile struct perf_event_mmap_page
*header
;
62 /* The BTS perf event buffer. */
63 struct perf_event_buffer bts
;
66 /* Branch trace target information for Intel(R) Processor Trace. */
67 struct btrace_tinfo_pt
69 /* The Linux perf_event configuration for collecting the branch trace. */
70 struct perf_event_attr attr
;
72 /* The perf event file. */
75 /* The perf event configuration page. */
76 volatile struct perf_event_mmap_page
*header
;
78 /* The trace perf event buffer. */
79 struct perf_event_buffer pt
;
81 #endif /* HAVE_LINUX_PERF_EVENT_H */
83 /* Branch trace target information per thread. */
84 struct btrace_target_info
86 /* The ptid of this thread. */
89 /* The obtained branch trace configuration. */
90 struct btrace_config conf
;
92 #if HAVE_LINUX_PERF_EVENT_H
93 /* The branch tracing format specific information. */
96 /* CONF.FORMAT == BTRACE_FORMAT_BTS. */
97 struct btrace_tinfo_bts bts
;
99 /* CONF.FORMAT == BTRACE_FORMAT_PT. */
100 struct btrace_tinfo_pt pt
;
102 #endif /* HAVE_LINUX_PERF_EVENT_H */
104 /* The size of a pointer in bits for this thread.
105 The information is used to identify kernel addresses in order to skip
106 records from/to kernel space. */
110 /* See to_supports_btrace in target.h. */
111 extern int linux_supports_btrace (struct target_ops
*, enum btrace_format
);
113 /* See to_enable_btrace in target.h. */
114 extern struct btrace_target_info
*
115 linux_enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
);
117 /* See to_disable_btrace in target.h. */
118 extern enum btrace_error
linux_disable_btrace (struct btrace_target_info
*ti
);
120 /* See to_read_btrace in target.h. */
121 extern enum btrace_error
linux_read_btrace (struct btrace_data
*btrace
,
122 struct btrace_target_info
*btinfo
,
123 enum btrace_read_type type
);
125 /* See to_btrace_conf in target.h. */
126 extern const struct btrace_config
*
127 linux_btrace_conf (const struct btrace_target_info
*);
129 #endif /* LINUX_BTRACE_H */
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