Add branch trace information to struct thread_info.

Add functions to enable, disable, clear, and fetch a thread's branch trace.

gdb/
	* target.h: Include btrace.h.
	(struct target_ops) <to_supports_btrace, to_enable_btrace,
	to_disable_btrace, to_teardown_btrace, to_read_btrace>: New.
	* target.c (target_supports_btrace): New function.
	(target_enable_btrace): New function.
	(target_disable_btrace): New function.
	(target_teardown_btrace): New function.
	(target_read_btrace): New function.
	* btrace.h: New file.
	* btrace.c: New file.
	* Makefile.in: Add btrace.c.
	* gdbthread.h: Include btrace.h.
	(struct thread_info): Add btrace field.
	* thread.c: Include btrace.h.
	(clear_thread_inferior_resources): Call target_teardown_btrace.
	* common/btrace-common.h: New file.
Fix ChangeLog date.
Implement branch tracing on Linux based on perf_event such that it can be shared
between gdb and gdbserver.

gdb/
	* common/linux_btrace.h: New file.
	* common/linux_btrace.c: New file.
	* Makefile.in (SFILES): Add btrace.c.
	(HFILES_NO_SRCDIR): Add common/linux-btrace.h.
	(COMMON_OBS): Add btrace.o.
	(linux-btrace.o): New rule.

gdbserver/
	* Makefile.in (SFILES): Add $(srcdir)/common/linux-btrace.c.
	(linux_btrace_h): New variable.
	(linux-btrace.o): New rule.
Install the btrace target ops for i386-linux-nat and amd64-linux-nat.

gdb/
	* amd64-linux-nat.c: Include btrace.h and linux-btrace.h.
	(amd64_linux_enable_btrace): New.
	(amd64_linux_disable_btrace): New.
	(amd64_linux_teardown_btrace): New.
	(_initialize_amd64_linux_nat): Initialize btrace ops.
	* i386-linux.nat.c: Include btrace.h and linux-btrace.h.
	(i386_linux_enable_btrace): New.
	(i386_linux_disable_btrace): New.
	(i386_linux_teardown_btrace): New.
	(_initialize_i386_linux_nat): Initialize btrace ops.
	* config/i386/linux.mh: Add linux-btrace.o.
	* config/i386/linux64.mh: Add linux-btrace.o.
Define the xml document style for transferring branch trace data.

Add a function to parse a btrace xml document into a vector of branch trace
blocks.

gdb/
	* features/btrace.dtd: New file.
	* Makefile.in (XMLFILES): Add btrace.dtd.
	* btrace.h (parse_xml_btrace): New declaration.
	* btrace.c: Include xml-support.h.
	(parse_xml_btrace): New function.
	(parse_xml_btrace_block): New function.
	(block_attributes): New struct.
	(btrace_attributes): New struct.
	(btrace_children): New struct.
	(btrace_elements): New struct.
Preserve a verbose error message of xfer functions if they return -3.

gdbserver/
	* server.c (handle_qxfer): Preserve error message if -3 is
	returned.
	(qxfer): Document the -3 return value.
Add the gdb remote target operations for branch tracing.
We define the following packets:

  Qbtrace:bts         enable branch tracing for the current thread
                      returns "OK" or "Enn"

  Qbtrace:off         disable branch tracing for the current thread
                      returns "OK" or "Enn"

  qXfer:btrace:read   read the full branch trace data for the current thread

gdb/
	* target.h (enum target_object): Add TARGET_OBJECT_BTRACE.
	* remote.c: Include btrace.h.
	(struct btrace_target_info): New struct.
	(remote_supports_btrace): New function.
	(send_Qbtrace): New function.
	(remote_enable_btrace): New function.
	(remote_disable_btrace): New function.
	(remote_teardown_btrace): New function.
	(remote_read_btrace): New function.
	(init_remote_ops): Add btrace ops.
	(enum <unnamed>): Add btrace packets.
	(struct protocol_feature remote_protocol_features[]): Add btrace packets.
	(_initialize_remote): Add packet configuration for branch tracing.

gdbserver/
	* target.h (struct target_ops): Add btrace ops.
	(target_supports_btrace): New macro.
	(target_enable_btrace): New macro.
	(target_disable_btrace): New macro.
	(target_read_btrace): New macro.
	* gdbthread.h (struct thread_info): Add btrace field.
	* server.c: Include btrace-common.h.
	(handle_btrace_general_set): New function.
	(handle_btrace_enable): New function.
	(handle_btrace_disable): New function.
	(handle_general_set): Call handle_btrace_general_set.
	(handle_qxfer_btrace): New function.
	(struct qxfer qxfer_packets[]): Add btrace entry.
	* inferiors.c (remove_thread): Disable btrace.
	* linux-low: Include linux-btrace.h.
	(linux_low_enable_btrace): New function.
	(linux_low_read_btrace): New function.
	(linux_target_ops): Add btrace ops.
	* configure.srv (i[34567]86-*-linux*): Add linux-btrace.o.
	Add srv_linux_btrace=yes.
	(x86_64-*-linux*): Add linux-btrace.o.
	Add srv_linux_btrace=yes.
	* configure.ac: Define HAVE_LINUX_BTRACE.
	* config.in: Regenerated.
	* configure: Regenerated.
Document the branch tracing extensions to the remote serial protocol.

doc/
	* gdb.texinfo (Requirements): List qXfer:btrace:read requiring expat.
	(General Query Packets): Describe Qbtrace:bts, Qbtrace:off, and
	qXfer:btrace:read.
LBR, BTM, or BTS records may have incorrect branch "from" information afer an
EIST transition, T-states, C1E, or Adaptive Thermal Throttling (AAJ122).

This results in sporadic test fails. Disable btrace on those processors.

gdb/
	* common/linux-btrace.c: Include sys/ptrace, sys/types, sys/wait.h,
	and signal.h.
	(linux_supports_btrace): Add kernel and
	cpuid check.
	(kernel_supports_btrace): New function.
	(cpu_supports_btrace): New function.
	(intel_supports_btrace): New function.
Add a new function to target.h to add an alias command for a target and mark it
deprecated.  This is useful when renaming targets.

gdb/
	* target.h (add_deprecated_target_alias): New.
	* target.c (add_deprecated_target_alias): New.
Split record.h into record.h and record-full.h.
Split record.c into record.c and record-full.c.

The split leaves the command part in record.c and moves the target part into
record-full.c.

gdb/
	* record.h: Split into this and ...
	* record-full.h: ... this.
	* record.c: Split into this and ...
	* record-full.c: ... this.
	* target.h (target_ops): Add new fields to_info_record,
	to_save_record, to_delete_record, to_record_is_replaying,
	to_goto_record_begin, to_goto_record_end, to_goto_record.
	(target_info_record): New.
	(target_save_record): New.
	(target_supports_delete_record): New.
	(target_delete_record): New.
	(target_record_is_replaying): New.
	(target_goto_record_begin): New.
	(target_goto_record_end): New.
	(target_goto_record): New.
	* target.c (target_info_record): New.
	(target_save_record): New.
	(target_supports_delete_record): New.
	(target_delete_record): New.
	(target_record_is_replaying): New.
	(target_goto_record_begin): New.
	(target_goto_record_end): New.
	(target_goto_record): New.
	* record.h: Declare struct cmd_list_element.
	(record_cmdlist): New declaration.
	(set_record_cmdlist): New declaration.
	(show_record_cmdlist): New declaration.
	(info_record_cmdlist): New declaration.
	(cmd_record_goto): New declaration.
	* record.c: Remove unnecessary includes.
	Include inferior.h.
	(cmd_record_goto): Remove declaration.
	(record_cmdlist): Now extern. Initialize.
	(set_record_cmdlist): Now extern. Initialize.
	(show_record_cmdlist): Now extern. Initialize.
	(info_record_cmdlist): Now extern. Initialize.
	(find_record_target): New.
	(require_record_target): New.
	(cmd_record_start): Update.
	(cmd_record_delete): Remove target-specific code.
	Call target_delete_record.
	(cmd_record_stop): Unpush any record target.
	(set_record_insn_max_num): Move to record-full.c
	(set_record_command): Add comment.
	(show_record_command): Add comment.
	(info_record_command): Update comment.
	Remove target-specific code.
	Call the record target's to_info_record.
	(cmd_record_start): New.
	(cmd_record_goto): Now extern.
	Remove target-specific code.
	Call target_goto_begin,  target_goto_end, or target_goto.
	(_initialize_record): Move record target ops initialization to
	record-full.c.
	Change "record" command help text.
	Move "record restore", "record set", and "record show" commands to
	record-full.c.
	* Makefile.in (SFILES): Add record-full.c.
	(HFILES_NO_SRCDIR): Add record-full.h.
	(COMMON_OBS): Add record-full.o.
	* amd64-linux-tdep.c: Include record-full.h instead of record.h.
	* arm-tdep.c: Include record-full.h.
	* i386-linux-tdep.c: Include record-full.h instead of record.h.
	* i386-tdep.c: Include record-full.h.
	* infrun.c: Include record-full.h.
	* linux-record.c: Include record-full.h.
	* moxie-tdep.c: Include record-full.h.
	* record-full.c: Include record-full.h.
	Change module comment.
	(set_record_full_cmdlist): New.
	(show_record_full_cmdlist): New.
	(record_full_cmdlist): New.
	(record_goto_insn): New declaration.
	(record_save): New declaration.
	(record_check_insn_num): Change query string.
	(record_info): New.
	(record_delete): New.
	(record_is_replaying): New.
	(record_goto_entry): New.
	(record_goto_begin): New.
	(record_goto_end): New.
	(record_goto): New.
	(init_record_ops): Update.
	(init_record_core_ops): Update.
	(cmd_record_save): Rename to record_save. Remove target and arg checks.
	(cmd_record_start): New.
	(set_record_insn_max_num): Moved from record.c
	(set_record_full_command): New.
	(show_record_full_command): New.
	(_initialize_record_full): New.
Rename record_ prefixes in record-full.c into record_full_.

gdb/
	* record-full.c (DEFAULT_RECORD_INSN_MAX_NUM): Renamed to ...
	(DEFAULT_RECORD_FULL_INSN_MAX_NUM): ... this. Updated all users.
	(RECORD_IS_REPLAY): Renamed to ...
	(RECORD_FULL_IS_REPLAY): ... this. Updated all users.
	(RECORD_FILE_MAGIC): Renamed to ...
	(RECORD_FULL_FILE_MAGIC): ... this. Updated all users.
	(record_mem_entry): Renamed to ...
	(record_full_mem_entry): ... this. Updated all users.
	(record_reg_entry): Renamed to ...
	(record_full_reg_entry): ... this. Updated all users.
	(record_end_entry): Renamed to ...
	(record_full_end_entry): ... this. Updated all users.
	(record_type) <record_end, record_reg, record_mem>: Renamed
	to ...
	(record_full_type) <record_full_end, record_full_reg,
	record_full_mem>: ... this. Updated all users.
	(record_entry): Renamed to ...
	(record_full_entry): ... this. Updated all users.
	(record_core_buf_entry): Renamed to ...
	(record_full_core_buf_entry): ... this. Updated all users.
	(record_core_regbuf): Renamed to ...
	(record_full_core_regbuf): ... this. Updated all users.
	(record_core_start): Renamed to ...
	(record_full_core_start): ... this. Updated all users.
	(record_core_end): Renamed to ...
	(record_full_core_end): ... this. Updated all users.
	(record_core_buf_list): Renamed to ...
	(record_full_core_buf_list): ... this. Updated all users.
	(record_first): Renamed to ...
	(record_full_first): ... this. Updated all users.
	(record_list): Renamed to ...
	(record_full_list): ... this. Updated all users.
	(record_arch_list_head): Renamed to ...
	(record_full_arch_list_head): ... this. Updated all users.
	(record_arch_list_tail): Renamed to ...
	(record_full_arch_list_tail): ... this. Updated all users.
	(record_stop_at_limit): Renamed to ...
	(record_full_stop_at_limit): ... this. Updated all users.
	(record_insn_max_num): Renamed to ...
	(record_full_insn_max_num): ... this. Updated all users.
	(record_insn_num): Renamed to ...
	(record_full_insn_num): ... this. Updated all users.
	(record_insn_count): Renamed to ...
	(record_full_insn_count): ... this. Updated all users.
	(record_ops): Renamed to ...
	(record_full_ops): ... this. Updated all users.
	(record_core_ops): Renamed to ...
	(record_full_core_ops): ... this. Updated all users.
	(set_record_cmdlist): Renamed to ...
	(set_record_full_cmdlist): ... this. Updated all users.
	(show_record_cmdlist): Renamed to ...
	(show_record_full_cmdlist): ... this. Updated all users.
	(record_cmdlist): Renamed to ...
	(record_full_cmdlist): ... this. Updated all users.
	(record_beneath_to_resume_ops): Renamed to ...
	(record_full_beneath_to_resume_ops): ... this. Updated all users.
	(record_beneath_to_resume): Renamed to ...
	(record_full_beneath_to_resume): ... this. Updated all users.
	(record_beneath_to_wait_ops): Renamed to ...
	(record_full_beneath_to_wait_ops): ... this. Updated all users.
	(record_beneath_to_wait): Renamed to ...
	(record_full_beneath_to_wait): ... this. Updated all users.
	(record_beneath_to_store_registers_ops): Renamed to ...
	(record_full_beneath_to_store_registers_ops): ... this.
	Updated all users.
	(record_beneath_to_store_registers): Renamed to ...
	(record_full_beneath_to_store_registers): ... this.
	Updated all users.
	(record_beneath_to_xfer_partial_ops): Renamed to ...
	(record_full_beneath_to_xfer_partial_ops): ... this.
	Updated all users.
	(record_beneath_to_xfer_partial): Renamed to ...
	(record_full_beneath_to_xfer_partial): ... this.
	Updated all users.
	(record_beneath_to_insert_breakpoint): Renamed to ...
	(record_full_beneath_to_insert_breakpoint): ... this.
	Updated all users.
	(record_beneath_to_stopped_by_watchpoint): Renamed to ...
	(record_full_beneath_to_stopped_by_watchpoint): ... this.
	Updated all users.
	(record_beneath_to_stopped_data_address): Renamed to ...
	(record_full_beneath_to_stopped_data_address): ... this.
	Updated all users.
	(record_beneath_to_async): Renamed to ...
	(record_full_beneath_to_async): ... this. Updated all users.
	(record_goto_insn): Renamed to ...
	(record_full_goto_insn): ... this. Updated all users.
	(record_save): Renamed to ...
	(record_full_save): ... this. Updated all users.
	(record_reg_alloc): Renamed to ...
	(record_full_reg_alloc): ... this. Updated all users.
	(record_reg_release): Renamed to ...
	(record_full_reg_release): ... this. Updated all users.
	(record_mem_alloc): Renamed to ...
	(record_full_mem_alloc): ... this. Updated all users.
	(record_mem_release): Renamed to ...
	(record_full_mem_release): ... this. Updated all users.
	(record_end_alloc): Renamed to ...
	(record_full_end_alloc): ... this. Updated all users.
	(record_end_release): Renamed to ...
	(record_full_end_release): ... this. Updated all users.
	(record_entry_release): Renamed to ...
	(record_full_entry_release): ... this. Updated all users.
	(record_list_release): Renamed to ...
	(record_full_list_release): ... this. Updated all users.
	(record_list_release_following): Renamed to ...
	(record_full_list_release_following): ... this.
	Updated all users.
	(record_list_release_first): Renamed to ...
	(record_full_list_release_first): ... this. Updated all users.
	(record_arch_list_add): Renamed to ...
	(record_full_arch_list_add): ... this. Updated all users.
	(record_get_loc): Renamed to ...
	(record_full_get_loc): ... this. Updated all users.
	(record_check_insn_num): Renamed to ...
	(record_full_check_insn_num): ... this. Updated all users.
	(record_arch_list_cleanups): Renamed to ...
	(record_full_arch_list_cleanups): ... this. Updated all users.
	(record_message): Renamed to ...
	(record_full_message): ... this. Updated all users.
	(record_message_wrapper): Renamed to ...
	(record_full_message_wrapper): ... this. Updated all users.
	(record_message_wrapper_safe): Renamed to ...
	(record_full_message_wrapper_safe): ... this. Updated all users.
	(record_gdb_operation_disable): Renamed to ...
	(record_full_gdb_operation_disable): ... this. Updated all users.
	(record_hw_watchpoint): Renamed to ...
	(record_full_hw_watchpoint): ... this. Updated all users.
	(record_exec_insn): Renamed to ...
	(record_full_exec_insn): ... this. Updated all users.
	(record_restore): Renamed to ...
	(record_full_restore): ... this. Updated all users.
	(record_async_inferior_event_token): Renamed to ...
	(record_full_async_inferior_event_token): ... this.
	Updated all users.
	(record_async_inferior_event_handler): Renamed to ...
	(record_full_async_inferior_event_handler): ... this.
	Updated all users.
	(record_core_open_1): Renamed to ...
	(record_full_core_open_1): ... this. Updated all users.
	(record_open_1): Renamed to ...
	(record_full_open_1): ... this. Updated all users.
	(record_open): Renamed to ...
	(record_full_open): ... this. Updated all users.
	(record_close): Renamed to ...
	(record_full_close): ... this. Updated all users.
	(record_resume_step): Renamed to ...
	(record_full_resume_step): ... this. Updated all users.
	(record_resumed): Renamed to ...
	(record_full_resumed): ... this. Updated all users.
	(record_execution_dir): Renamed to ...
	(record_full_execution_dir): ... this. Updated all users.
	(record_resume): Renamed to ...
	(record_full_resume): ... this. Updated all users.
	(record_get_sig): Renamed to ...
	(record_full_get_sig): ... this. Updated all users.
	(record_sig_handler): Renamed to ...
	(record_full_sig_handler): ... this. Updated all users.
	(record_wait_cleanups): Renamed to ...
	(record_full_wait_cleanups): ... this. Updated all users.
	(record_wait_1): Renamed to ...
	(record_full_wait_1): ... this. Updated all users.
	(record_wait): Renamed to ...
	(record_full_wait): ... this. Updated all users.
	(record_stopped_by_watchpoint): Renamed to ...
	(record_full_stopped_by_watchpoint): ... this. Updated all users.
	(record_disconnect): Renamed to ...
	(record_full_disconnect): ... this. Updated all users.
	(record_detach): Renamed to ...
	(record_full_detach): ... this. Updated all users.
	(record_mourn_inferior): Renamed to ...
	(record_full_mourn_inferior): ... this. Updated all users.
	(record_kill): Renamed to ...
	(record_full_kill): ... this. Updated all users.
	(record_stopped_data_address): Renamed to ...
	(record_full_stopped_data_address): ... this. Updated all users.
	(record_registers_change): Renamed to ...
	(record_full_registers_change): ... this. Updated all users.
	(record_store_registers): Renamed to ...
	(record_full_store_registers): ... this. Updated all users.
	(record_xfer_partial): Renamed to ...
	(record_full_xfer_partial): ... this. Updated all users.
	(record_breakpoint): Renamed to ...
	(record_full_breakpoint): ... this. Updated all users.
	(record_breakpoint_p): Renamed to ...
	(record_full_breakpoint_p): ... this. Updated all users.
	(record_breakpoints): Renamed to ...
	(record_full_breakpoints): ... this. Updated all users.
	(record_sync_record_breakpoints): Renamed to ...
	(record_full_sync_record_breakpoints): ... this.
	Updated all users.
	(record_init_record_breakpoints): Renamed to ...
	(record_full_init_record_breakpoints): ... this.
	Updated all users.
	(record_insert_breakpoint): Renamed to ...
	(record_full_insert_breakpoint): ... this. Updated all users.
	(record_remove_breakpoint): Renamed to ...
	(record_full_remove_breakpoint): ... this. Updated all users.
	(record_can_execute_reverse): Renamed to ...
	(record_full_can_execute_reverse): ... this. Updated all users.
	(record_get_bookmark): Renamed to ...
	(record_full_get_bookmark): ... this. Updated all users.
	(record_goto_bookmark): Renamed to ...
	(record_full_goto_bookmark): ... this. Updated all users.
	(record_async): Renamed to ...
	(record_full_async): ... this. Updated all users.
	(record_can_async_p): Renamed to ...
	(record_full_can_async_p): ... this. Updated all users.
	(record_is_async_p): Renamed to ...
	(record_full_is_async_p): ... this. Updated all users.
	(record_execution_direction): Renamed to ...
	(record_full_execution_direction): ... this. Updated all users.
	(record_info): Renamed to ...
	(record_full_info): ... this. Updated all users.
	(record_delete): Renamed to ...
	(record_full_delete): ... this. Updated all users.
	(record_is_replaying): Renamed to ...
	(record_full_is_replaying): ... this. Updated all users.
	(record_goto_entry): Renamed to ...
	(record_full_goto_entry): ... this. Updated all users.
	(record_goto_begin): Renamed to ...
	(record_full_goto_begin): ... this. Updated all users.
	(record_goto_end): Renamed to ...
	(record_full_goto_end): ... this. Updated all users.
	(record_goto): Renamed to ...
	(record_full_goto): ... this. Updated all users.
	(init_record_ops): Renamed to ...
	(init_record_full_ops): ... this. Updated all users.
	(record_core_resume): Renamed to ...
	(record_full_core_resume): ... this. Updated all users.
	(record_core_kill): Renamed to ...
	(record_full_core_kill): ... this. Updated all users.
	(record_core_fetch_registers): Renamed to ...
	(record_full_core_fetch_registers): ... this. Updated all users.
	(record_core_prepare_to_store): Renamed to ...
	(record_full_core_prepare_to_store): ... this. Updated all users.
	(record_core_store_registers): Renamed to ...
	(record_full_core_store_registers): ... this. Updated all users.
	(record_core_xfer_partial): Renamed to ...
	(record_full_core_xfer_partial): ... this. Updated all users.
	(record_core_insert_breakpoint): Renamed to ...
	(record_full_core_insert_breakpoint): ... this. Updated all users.
	(record_core_remove_breakpoint): Renamed to ...
	(record_full_core_remove_breakpoint): ... this. Updated all users.
	(record_core_has_execution): Renamed to ...
	(record_full_core_has_execution): ... this. Updated all users.
	(init_record_core_ops): Renamed to ...
	(init_record_full_core_ops): ... this. Updated all users.
	(cmd_record_restore): Renamed to ...
	(cmd_record_full_restore): ... this. Updated all users.
	(record_save_cleanups): Renamed to ...
	(record_full_save_cleanups): ... this. Updated all users.
	(cmd_record_start): Renamed to ...
	(cmd_record_full_start): ... this. Updated all users.
	(set_record_insn_max_num): Renamed to ...
	(set_record_full_insn_max_num): ... this. Updated all users.
	(set_record_command): Renamed to ...
	(set_record_full_command): ... this. Updated all users.
	(show_record_command): Renamed to ...
	(show_record_full_command): ... this. Updated all users.
	(_initialize_record): Renamed to ...
	(_initialize_record_full): ... this. Updated all users.
Rename record_ prefixes in record-full.h into record_full_.

gdb/
	* record-full.h, record-full.c (record_memory_query): Rename
	to ...
	(record_full_memory_query): ...this. Update all users.
	(record_arch_list_add_reg): Rename to ...
	(record_full_arch_list_add_reg): ...this. Update all users.
	(record_arch_list_add_mem): Rename to ...
	(record_full_arch_list_add_mem): ...this. Update all users.
	(record_arch_list_add_end): Rename to ...
	(record_full_arch_list_add_end): ...this. Update all users.
	(record_gdb_operation_disable_set): Rename to ...
	(record_full_gdb_operation_disable_set): ...this.
	Update all users.
Provide default target methods for record targets that are likely to be shared
between different record targets.

gdb/
	* record.h (record_disconnect): New.
	(record_detach): New.
	(record_mourn_inferior): New.
	(record_kill): New.
	* record-full.c (record_disconnect, record_detach,
	record_mourn_inferior, record_kill): Move to...
	* record.c: ...here.
	(DEBUG): New.
	(record_stop): New.
	(record_unpush): New.
	(cmd_record_stop): Call record_stop. Replace unpush_target
	call with record_unpush call.
	(record_disconnect, record_detach): Assert that the target
	is of record stratum. Call record_unpush, record_stop, and
	DEBUG.
	(record_mourn_inferior, record_kill): Assert that the target
	is of record stratum. Call record_unpush and DEBUG.
Add a command to provide a disassembly of the execution trace log.

gdb/
	* target.h (target_ops) <to_insn_history, to_insn_history_from,
	to_insn_history_range>: New fields.
	(target_insn_history): New.
	(target_insn_history_from): New.
	(target_insn_history_range): New.
	* target.c (target_insn_history): New.
	(target_insn_history_from): New.
	(target_insn_history_range): New.
	* record.c: Include cli/cli-utils.h, disasm.h, ctype.h.
	(record_insn_history_size): New.
	(get_insn_number): New.
	(get_context_size): New.
	(no_chunk): New.
	(get_insn_history_modifiers): New.
	(cmd_record_insn_history): New.
	(_initialize_record): Add "set/show record instruction-history-size"
	command. Add "record instruction-history" command.
Add command to print the function names from recorded instructions.

This command provides a quick high-level overview over the recorded execution
log at function granularity without having to reverse-step.

gdb/
	* target.c (target_call_history, target_call_history_from,
	target_call_history_range): New.
	* target.h (target_ops) <to_call_history, to_call_history_from,
	to_call_history_range>: New fields.
	(target_call_history, target_call_history_from,
	target_call_history_range): New declaration.
	* record.c (get_call_history_modifiers, cmd_record_call_history,
	record_call_history_size): New.
	(_initialize_record): Add the "record function-call-history" command.
	Add "set/show record function-call-history-size" commands.
	* record.h (record_print_flag): New.
Add a target for branch trace recording.

The target implements the new record sub-commands
"record instruction-history" and
"record function-call-history".

The target does not support reverse execution or navigation in the
recorded execution log.

gdb/
	* Makefile.in (SFILES): Add record-btrace.c
	(COMMON_OBS): Add record-btrace.o
	* record-btrace.c: New.
	* objfiles.c: Include btrace.h.
	(free_objfile): call btrace_free_objfile.
Add a disassembly flag to omit the pc prefix and use it in the "record
instruction-history" command of record-btrace.

The pc prefix would appear multiple times in the branch trace disassembly,
which is more confusing than helpful.

gdb/
	* record-btrace.c (btrace_insn_history): Omit the pc prefix in
	the instruction history disassembly.
	* disasm.c (dump_insns): Omit the pc prefix, if requested.
	* disasm.h (DISASSEMBLY_OMIT_PC): New.
Document changes to the record target resulting from the renaming into
record-full.

Document two new record sub-commands "record instruction-history" and
"record function-call-history" and two associated set/show commands
"set record instruction-history-size" and "set record
function-call-history-size".

Add this to NEWS.

gdb/
	* NEWS: Add record changes.

doc/
	* gdb.texinfo (Process Record and Replay): Document record
	changes.
Add tests for the new record-btrace target.

testsuite/
	* Makefile.in: Add btrace testsuite.
	* configure: Regenerated.
	* configure.ac: Add btrace testsuite.
	* gdb.btrace/Makefile.in: New file.
	* gdb.btrace/enable.c: New file.
	* gdb.btrace/enable.exp: New file.
	* gdb.btrace/function_call_history.c: New file.
	* gdb.btrace/function_call_history.exp: New file.
	* gdb.btrace/instruction_history.c: New file.
	* gdb.btrace/instruction_history.exp: New file.
	* gdb.btrace/instruction_history.S: New file.
	* lib/gdb.exp: Add btrace skip proc.