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126 lines
3.4 KiB
C
126 lines
3.4 KiB
C
/* Linux-dependent part of branch trace support for GDB, and GDBserver.
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Copyright (C) 2013-2017 Free Software Foundation, Inc.
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Contributed by Intel Corp. <markus.t.metzger@intel.com>
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef LINUX_BTRACE_H
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#define LINUX_BTRACE_H
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#include "btrace-common.h"
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#include "vec.h"
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#if HAVE_LINUX_PERF_EVENT_H
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# include <linux/perf_event.h>
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#endif
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struct target_ops;
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#if HAVE_LINUX_PERF_EVENT_H
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/* A Linux perf event buffer. */
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struct perf_event_buffer
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{
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/* The mapped memory. */
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const uint8_t *mem;
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/* The size of the mapped memory in bytes. */
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size_t size;
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/* A pointer to the data_head field for this buffer. */
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volatile __u64 *data_head;
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/* The data_head value from the last read. */
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__u64 last_head;
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};
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/* Branch trace target information for BTS tracing. */
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struct btrace_tinfo_bts
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{
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/* The Linux perf_event configuration for collecting the branch trace. */
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struct perf_event_attr attr;
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/* The perf event file. */
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int file;
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/* The perf event configuration page. */
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volatile struct perf_event_mmap_page *header;
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/* The BTS perf event buffer. */
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struct perf_event_buffer bts;
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};
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/* Branch trace target information for Intel Processor Trace
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tracing. */
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struct btrace_tinfo_pt
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{
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/* The Linux perf_event configuration for collecting the branch trace. */
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struct perf_event_attr attr;
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/* The perf event file. */
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int file;
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/* The perf event configuration page. */
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volatile struct perf_event_mmap_page *header;
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/* The trace perf event buffer. */
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struct perf_event_buffer pt;
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};
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#endif /* HAVE_LINUX_PERF_EVENT_H */
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/* Branch trace target information per thread. */
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struct btrace_target_info
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{
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/* The ptid of this thread. */
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ptid_t ptid;
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/* The obtained branch trace configuration. */
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struct btrace_config conf;
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#if HAVE_LINUX_PERF_EVENT_H
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/* The branch tracing format specific information. */
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union
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{
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/* CONF.FORMAT == BTRACE_FORMAT_BTS. */
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struct btrace_tinfo_bts bts;
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/* CONF.FORMAT == BTRACE_FORMAT_PT. */
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struct btrace_tinfo_pt pt;
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} variant;
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#endif /* HAVE_LINUX_PERF_EVENT_H */
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};
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/* See to_supports_btrace in target.h. */
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extern int linux_supports_btrace (struct target_ops *, enum btrace_format);
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/* See to_enable_btrace in target.h. */
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extern struct btrace_target_info *
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linux_enable_btrace (ptid_t ptid, const struct btrace_config *conf);
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/* See to_disable_btrace in target.h. */
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extern enum btrace_error linux_disable_btrace (struct btrace_target_info *ti);
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/* See to_read_btrace in target.h. */
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extern enum btrace_error linux_read_btrace (struct btrace_data *btrace,
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struct btrace_target_info *btinfo,
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enum btrace_read_type type);
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/* See to_btrace_conf in target.h. */
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extern const struct btrace_config *
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linux_btrace_conf (const struct btrace_target_info *);
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#endif /* LINUX_BTRACE_H */
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