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.
92 lines
3.2 KiB
Text
92 lines
3.2 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-tailcall.S
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set opts {}
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if [info exists COMPILE] {
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# make check RUNTESTFLAGS="gdb.btrace/tailcall.exp COMPILE=1"
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standard_testfile x86-tailcall.c
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lappend opts debug optimize=-O2
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} elseif { ![istarget x86_64-*-* ] || ![is_lp64_target] } {
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verbose "Skipping ${testfile}."
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return
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}
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if [prepare_for_testing tailcall.exp $testfile $srcfile $opts] {
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return -1
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}
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if ![runto_main] {
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return -1
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}
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# we want to see the full trace for this test
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gdb_test_no_output "set record function-call-history-size 0"
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# trace the call to foo
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gdb_test_no_output "record btrace"
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gdb_test "next"
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# show the flat branch trace
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gdb_test "record function-call-history 1" [join [list \
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"1\tmain" \
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"2\tfoo" \
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"3\tbar" \
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"4\tmain" \
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] "\r\n"] "flat"
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# show the branch trace with calls indented
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gdb_test "record function-call-history /c 1" [join [list \
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"1\tmain" \
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"2\t foo" \
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"3\t bar" \
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"4\tmain" \
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] "\r\n"] "indented"
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# go into bar
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gdb_test "record goto 4" ".*bar \\(\\) at .*x86-tailcall.c:24\r\n.*"
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# check the backtrace
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gdb_test "backtrace" [join [list \
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"#0.*bar \\(\\) at x86-tailcall.c:24" \
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"#1.*foo \\(\\) at x86-tailcall.c:29" \
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"#2.*main \\(\\) at x86-tailcall.c:37" \
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"Backtrace stopped: not enough registers or memory available to unwind further" \
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] "\r\n"]
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# walk the backtrace
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gdb_test "up" "#1\[^\r\n\]*foo \\(\\) at x86-tailcall.c:29\r\n.*" "up to foo"
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gdb_test "up" "#2\[^\r\n\]*main \\(\\) at x86-tailcall.c:37\r\n.*" "up to main"
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gdb_test "down" "#1\[^\r\n\]*foo \\(\\) at x86-tailcall.c:29\r\n.*" "down to foo"
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# test stepping into and out of tailcalls.
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gdb_test "finish" "\[^\r\n\]*main \\(\\) at x86-tailcall.c:37\r\n.*"
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gdb_test "reverse-step" "\[^\r\n\]*bar \\(\\) at x86-tailcall.c:24\r\n.*"
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gdb_test "reverse-finish" "\[^\r\n\]*foo \\(\\) at x86-tailcall.c:29\r\n.*"
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gdb_test "reverse-step" "\[^\r\n\]*main \\(\\) at x86-tailcall.c:37\r\n.*"
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gdb_test "next" "\[^\r\n\]*main \\(\\) at x86-tailcall.c:39\r\n.*"
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gdb_test "reverse-next" "\[^\r\n\]*main \\(\\) at x86-tailcall.c:37\r\n.*"
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gdb_test "step" "\[^\r\n\]*foo \\(\\) at x86-tailcall.c:29\r\n.*"
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gdb_test "finish" "\[^\r\n\]*main \\(\\) at x86-tailcall.c:37\r\n.*"
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gdb_test "reverse-step" "\[^\r\n\]*bar \\(\\) at x86-tailcall.c:24\r\n.*"
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gdb_test "finish" "\[^\r\n\]*main \\(\\) at x86-tailcall.c:37\r\n.*"
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