52834460bc
Provide to_resume and to_wait target methods for the btrace record target to allow reverse stepping and replay support. Replay is limited in the sense that only stepping and source correlation are supported. We do not record data and thus can not show variables. Non-stop mode is not working. Do not allow record-btrace in non-stop mode. 2014-01-16 Markus Metzger <markus.t.metzger@intel.com> * btrace.h (btrace_thread_flag): New. (struct btrace_thread_info) <flags>: New. * record-btrace.c (record_btrace_resume_thread) (record_btrace_find_thread_to_move, btrace_step_no_history) (btrace_step_stopped, record_btrace_start_replaying) (record_btrace_step_thread, record_btrace_decr_pc_after_break) (record_btrace_find_resume_thread): New. (record_btrace_resume, record_btrace_wait): Extend. (record_btrace_can_execute_reverse): New. (record_btrace_open): Fail in non-stop mode. (record_btrace_set_replay): Split into this, ... (record_btrace_stop_replaying): ... this, ... (record_btrace_clear_histories): ... and this. (init_record_btrace_ops): Init to_can_execute_reverse. * NEWS: Announce it. testsuite/ * gdb.btrace/delta.exp: Check reverse stepi. * gdb.btrace/tailcall.exp: Update. Add stepping tests. * gdb.btrace/finish.exp: New. * gdb.btrace/next.exp: New. * gdb.btrace/nexti.exp: New. * gdb.btrace/record_goto.c: Add comments. * gdb.btrace/step.exp: New. * gdb.btrace/stepi.exp: New. * gdb.btrace/multi-thread-step.c: New. * gdb.btrace/multi-thread-step.exp: New. * gdb.btrace/rn-dl-bind.c: New. * gdb.btrace/rn-dl-bind.exp: New. * gdb.btrace/data.c: New. * gdb.btrace/data.exp: New. * gdb.btrace/Makefile.in (EXECUTABLES): Add new. doc/ * gdb.texinfo: Document limited reverse/replay support for target record-btrace.
93 lines
3.1 KiB
Text
93 lines
3.1 KiB
Text
# This testcase is part of GDB, the GNU debugger.
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#
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# Copyright 2013 Free Software Foundation, Inc.
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#
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# Contributed by Intel Corp. <markus.t.metzger@intel.com>
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#
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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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#
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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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#
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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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# check for btrace support
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if { [skip_btrace_tests] } { return -1 }
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# start inferior
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standard_testfile x86-record_goto.S
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if [prepare_for_testing stepi.exp $testfile $srcfile] {
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return -1
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}
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global gdb_prompt
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if ![runto_main] {
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return -1
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}
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proc check_replay_at { insn } {
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gdb_test "info record" [join [list \
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"Active record target: record-btrace" \
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"Recorded 40 instructions in 16 functions for .*" \
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"Replay in progress\. At instruction $insn\." \
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] "\r\n"]
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}
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# trace the call to the test function
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gdb_test_no_output "record btrace"
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gdb_test "next"
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# we start with stepping to make sure that the trace is fetched automatically
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gdb_test "reverse-stepi" ".*fun4\.5.*"
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gdb_test "reverse-stepi" ".*fun4\.5.*"
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# let's check where we are in the trace
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with_test_prefix "reverse-stepi to 39" { check_replay_at 39 }
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# let's step forward and check again
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gdb_test "stepi" ".*fun4\.5.*"
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with_test_prefix "stepi to 40" { check_replay_at 40 }
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# with the next step, we stop replaying
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gdb_test "stepi" ".*main\.3.*"
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gdb_test "info record" [join [list \
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"Active record target: record-btrace" \
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"Recorded 40 instructions in 16 functions for \[^\\\r\\\n\]*" \
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] "\r\n"] "stepi to live"
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# let's step from a goto position somewhere in the middle
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gdb_test "record goto 22" ".*fun3\.2.*"
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with_test_prefix "goto 22" { check_replay_at 22 }
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gdb_test "stepi" ".*fun1\.1.*"
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with_test_prefix "stepi to 23" { check_replay_at 23 }
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# and back again
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gdb_test "reverse-stepi" ".*fun3\.2.*"
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gdb_test "reverse-stepi" ".*fun3\.1.*"
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with_test_prefix "reverse-stepi to 21" { check_replay_at 21 }
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# let's try to step off the left end
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gdb_test "record goto begin" ".*main\.2.*"
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with_test_prefix "goto begin" { check_replay_at 1 }
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gdb_test "reverse-stepi" "No more reverse-execution history\.\r\n.*main\.2.*"
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gdb_test "reverse-stepi" "No more reverse-execution history\.\r\n.*main\.2.*"
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with_test_prefix "reverse-stepi at begin" { check_replay_at 1 }
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# we can step forward, though
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gdb_test "stepi" ".*fun4\.1.*"
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with_test_prefix "stepi to 2" { check_replay_at 2 }
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# let's try to step off the left end again
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gdb_test "reverse-stepi" ".*main\.2.*"
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gdb_test "reverse-stepi" "No more reverse-execution history\.\r\n.*main\.2.*"
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gdb_test "reverse-stepi" "No more reverse-execution history\.\r\n.*main\.2.*"
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with_test_prefix "reverse-stepi at begin" { check_replay_at 1 }
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