f4abbc1682
Add a struct to describe the branch trace configuration and use it for
enabling branch tracing.
The user will be able to set configuration fields for each tracing format
to be used for new threads.
The actual configuration that is active for a given thread will be shown
in the "info record" command.
At the moment, the configuration struct only contains a format field
that is set to the only available format.
The format is the only configuration option that can not be set via set
commands. It is given as argument to the "record btrace" command when
starting recording.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* Makefile.in (XMLFILES): Add btrace-conf.dtd.
* x86-linux-nat.c (x86_linux_enable_btrace): Update parameters.
(x86_linux_btrace_conf): New.
(x86_linux_create_target): Initialize to_btrace_conf.
* nat/linux-btrace.c (linux_enable_btrace): Update parameters.
Check format. Split into this and ...
(linux_enable_bts): ... this.
(linux_btrace_conf): New.
(perf_event_skip_record): Renamed into ...
(perf_event_skip_bts_record): ... this. Updated users.
(linux_disable_btrace): Split into this and ...
(linux_disable_bts): ... this.
(linux_read_btrace): Check format.
* nat/linux-btrace.h (linux_enable_btrace): Update parameters.
(linux_btrace_conf): New.
(btrace_target_info)<ptid>: Moved.
(btrace_target_info)<conf>: New.
(btrace_target_info): Split into this and ...
(btrace_tinfo_bts): ... this. Updated users.
* btrace.c (btrace_enable): Update parameters.
(btrace_conf, parse_xml_btrace_conf_bts, parse_xml_btrace_conf)
(btrace_conf_children, btrace_conf_attributes)
(btrace_conf_elements): New.
* btrace.h (btrace_enable): Update parameters.
(btrace_conf, parse_xml_btrace_conf): New.
* common/btrace-common.h (btrace_config): New.
* feature/btrace-conf.dtd: New.
* record-btrace.c (record_btrace_conf): New.
(record_btrace_cmdlist): New.
(record_btrace_enable_warn, record_btrace_open): Pass
&record_btrace_conf.
(record_btrace_info): Print recording format.
(cmd_record_btrace_bts_start): New.
(cmd_record_btrace_start): Call cmd_record_btrace_bts_start.
(_initialize_record_btrace): Add "record btrace bts" subcommand.
Add "record bts" alias command.
* remote.c (remote_state)<btrace_config>: New.
(remote_btrace_reset, PACKET_qXfer_btrace_conf): New.
(remote_protocol_features): Add qXfer:btrace-conf:read.
(remote_open_1): Call remote_btrace_reset.
(remote_xfer_partial): Handle TARGET_OBJECT_BTRACE_CONF.
(btrace_target_info)<conf>: New.
(btrace_sync_conf, btrace_read_config): New.
(remote_enable_btrace): Update parameters. Call btrace_sync_conf and
btrace_read_conf.
(remote_btrace_conf): New.
(init_remote_ops): Initialize to_btrace_conf.
(_initialize_remote): Add qXfer:btrace-conf packet.
* target.c (target_enable_btrace): Update parameters.
(target_btrace_conf): New.
* target.h (target_enable_btrace): Update parameters.
(target_btrace_conf): New.
(target_object)<TARGET_OBJECT_BTRACE_CONF>: New.
(target_ops)<to_enable_btrace>: Update parameters and comment.
(target_ops)<to_btrace_conf>: New.
* target-delegates: Regenerate.
* target-debug.h (target_debug_print_const_struct_btrace_config_p)
(target_debug_print_const_struct_btrace_target_info_p): New.
NEWS: Announce new command and new packet.
doc/
* gdb.texinfo (Process Record and Replay): Describe the "record
btrace bts" command.
(General Query Packets): Describe qXfer:btrace-conf:read packet.
(Branch Trace Configuration Format): New.
gdbserver/
* linux-low.c (linux_low_enable_btrace): Update parameters.
(linux_low_btrace_conf): New.
(linux_target_ops)<to_btrace_conf>: Initialize.
* server.c (current_btrace_conf): New.
(handle_btrace_enable): Rename to ...
(handle_btrace_enable_bts): ... this. Pass ¤t_btrace_conf
to target_enable_btrace. Update comment. Update users.
(handle_qxfer_btrace_conf): New.
(qxfer_packets): Add btrace-conf entry.
(handle_query): Report qXfer:btrace-conf:read as supported packet.
* target.h (target_ops)<enable_btrace>: Update parameters and comment.
(target_ops)<read_btrace_conf>: New.
(target_enable_btrace): Update parameters.
(target_read_btrace_conf): New.
testsuite/
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
113 lines
3.2 KiB
C
113 lines
3.2 KiB
C
/* Linux-dependent part of branch trace support for GDB, and GDBserver.
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Copyright (C) 2013-2015 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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#include <stdint.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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unsigned long long size;
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/* A pointer to the data_head field for this buffer. */
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volatile unsigned long long *data_head;
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/* The data_head value from the last read. */
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unsigned long long 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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#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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} variant;
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#endif /* HAVE_LINUX_PERF_EVENT_H */
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/* The size of a pointer in bits for this thread.
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The information is used to identify kernel addresses in order to skip
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records from/to kernel space. */
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int ptr_bits;
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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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