da8c46d296
Indicate speculatively executed instructions with a leading '?'. We use the space that is normally used for the PC prefix. In the case where the instruction at the current PC had been executed speculatively before, the PC prefix will be partially overwritten resulting in "?> ". As a side-effect, the /p modifier to omit the PC prefix in the "record instruction-history" command now uses a 3-space PC prefix " " in order to have enough space for the speculative execution indication. gdb/ * btrace.c (btrace_compute_ftrace_bts): Clear insn flags. (pt_btrace_insn_flags): New. (ftrace_add_pt): Call pt_btrace_insn_flags. * btrace.h (btrace_insn_flag): New. (btrace_insn) <flags>: New. * record-btrace.c (btrace_insn_history): Print insn prefix. * NEWS: Announce it. doc/ * gdb.texinfo (Process Record and Replay): Document prefixing of speculatively executed instructions in the "record instruction-history" command. testsuite/ * gdb.btrace/instruction_history.exp: Update. * gdb.btrace/tsx.exp: New. * gdb.btrace/tsx.c: New. * lib/gdb.exp (skip_tsx_tests, skip_btrace_pt_tests): New.
201 lines
7.1 KiB
Text
201 lines
7.1 KiB
Text
# This testcase is part of GDB, the GNU debugger.
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#
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# Copyright 2013-2015 Free Software Foundation, Inc.
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#
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# Contributed by Intel Corp. <christian.himpel@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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# compile and run to main
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standard_testfile .c .S
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if [prepare_for_testing $testfile.exp $testfile "$srcfile $srcfile2" {debug}] {
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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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# set bp before loop and continue
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set bp_location [gdb_get_line_number "bp.1" $srcfile2]
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gdb_breakpoint $srcfile2:$bp_location
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gdb_continue_to_breakpoint "cont to $bp_location" ".*$srcfile2:$bp_location.*"
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# start btrace
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gdb_test_no_output "record btrace"
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# set bp after loop and continue
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set bp_location [gdb_get_line_number "bp.2" $srcfile2]
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gdb_breakpoint $srcfile2:$bp_location
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gdb_continue_to_breakpoint "cont to $bp_location" ".*$srcfile2:$bp_location.*"
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# The following test cases test if "browsing" through the
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# instruction history works as expected. So for the tests
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# it is necessary to count the number of lines that are
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# shown by the "record instruction-history" command.
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set traced {}
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set testname "determine number of recorded instructions"
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gdb_test_multiple "info record" $testname {
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-re "Active record target: record-btrace\r\n.*\r\nRecorded \(\[0-9\]*\) instructions in \(\[0-9\]*\) functions \\\(0 gaps\\\) for thread 1 .*\\.\r\n$gdb_prompt $" {
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set traced $expect_out(1,string)
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pass $testname
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}
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}
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# we have exactly 11 instructions here
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set message "exactly 11 instructions"
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if { $traced != 11 } {
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fail $message
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} else {
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pass $message
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}
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# test that we see the expected instructions
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gdb_test "record instruction-history 3,7" [multi_line \
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"3\t 0x\[0-9a-f\]+ <loop\\+\[0-9\]+>:\tje 0x\[0-9a-f\]+ <loop\\+\[0-9\]+>" \
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"4\t 0x\[0-9a-f\]+ <loop\\+\[0-9\]+>:\tdec %eax" \
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"5\t 0x\[0-9a-f\]+ <loop\\+\[0-9\]+>:\tjmp 0x\[0-9a-f\]+ <loop\\+\[0-9\]+>" \
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"6\t 0x\[0-9a-f\]+ <loop\\+\[0-9\]+>:\tcmp \\\$0x0,%eax" \
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"7\t 0x\[0-9a-f\]+ <loop\\+\[0-9\]+>:\tje 0x\[0-9a-f\]+ <loop\\+\[0-9\]+>\r" \
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]
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gdb_test "record instruction-history /f 3,+5" [multi_line \
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"3\t 0x\[0-9a-f\]+ <\\+\[0-9\]+>:\tje 0x\[0-9a-f\]+ <loop\\+\[0-9\]+>" \
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"4\t 0x\[0-9a-f\]+ <\\+\[0-9\]+>:\tdec %eax" \
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"5\t 0x\[0-9a-f\]+ <\\+\[0-9\]+>:\tjmp 0x\[0-9a-f\]+ <loop\\+\[0-9\]+>" \
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"6\t 0x\[0-9a-f\]+ <\\+\[0-9\]+>:\tcmp \\\$0x0,%eax" \
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"7\t 0x\[0-9a-f\]+ <\\+\[0-9\]+>:\tje 0x\[0-9a-f\]+ <loop\\+\[0-9\]+>\r" \
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]
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gdb_test "record instruction-history /p 7,-5" [multi_line \
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"3\t 0x\[0-9a-f\]+ <loop\\+\[0-9\]+>:\tje 0x\[0-9a-f\]+ <loop\\+\[0-9\]+>" \
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"4\t 0x\[0-9a-f\]+ <loop\\+\[0-9\]+>:\tdec %eax" \
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"5\t 0x\[0-9a-f\]+ <loop\\+\[0-9\]+>:\tjmp 0x\[0-9a-f\]+ <loop\\+\[0-9\]+>" \
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"6\t 0x\[0-9a-f\]+ <loop\\+\[0-9\]+>:\tcmp \\\$0x0,%eax" \
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"7\t 0x\[0-9a-f\]+ <loop\\+\[0-9\]+>:\tje 0x\[0-9a-f\]+ <loop\\+\[0-9\]+>\r" \
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]
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gdb_test "record instruction-history /pf 3,7" [multi_line \
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"3\t 0x\[0-9a-f\]+ <\\+\[0-9\]+>:\tje 0x\[0-9a-f\]+ <loop\\+\[0-9\]+>" \
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"4\t 0x\[0-9a-f\]+ <\\+\[0-9\]+>:\tdec %eax" \
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"5\t 0x\[0-9a-f\]+ <\\+\[0-9\]+>:\tjmp 0x\[0-9a-f\]+ <loop\\+\[0-9\]+>" \
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"6\t 0x\[0-9a-f\]+ <\\+\[0-9\]+>:\tcmp \\\$0x0,%eax" \
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"7\t 0x\[0-9a-f\]+ <\\+\[0-9\]+>:\tje 0x\[0-9a-f\]+ <loop\\+\[0-9\]+>\r" \
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]
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gdb_test "record instruction-history 3,3" "3\t 0x\[0-9a-f\]+ <loop\\+\[0-9\]+>:\tje 0x\[0-9a-f\]+ <loop\\+\[0-9\]+>\r"
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# the following tests are checking the iterators
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# to avoid lots of regexps, we just check the number of lines that
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# were printed during command execution.
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# test_lines_output returns the output lines from command as a list.
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proc test_lines_output { command message } {
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global gdb_prompt
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set message "test_lines_output: $message"
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gdb_test_multiple $command $message {
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-re "\n\(.*\)\r\n$gdb_prompt $" {
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return [split [string trim $expect_out(1,string)] "\n"]
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}
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}
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}
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# test_lines_length returns the number of lines from command.
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proc test_lines_length { command message } {
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return [llength [test_lines_output $command $message]]
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}
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# show instruction history with unlimited size, we expect to see
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# all $traced instructions
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gdb_test_no_output "set record instruction-history-size 0"
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set message "record instruction-history - unlimited"
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set lines [test_lines_length "record instruction-history 1" $message]
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if { $traced != $lines } {
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fail $message
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} else {
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pass $message
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}
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gdb_test_no_output "set record instruction-history-size $traced"
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set message "record instruction-history - traced"
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set lines [test_lines_length "record instruction-history 1" $message]
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if { $traced != $lines } {
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fail $message
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} else {
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pass $message
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}
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# test that the iterator works
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set history_size 4
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gdb_test_no_output "set record instruction-history-size $history_size"
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set message "browse history forward start"
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set lines [test_lines_length "record instruction-history 1" $message]
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if { $lines != $history_size } {
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fail $message
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} else {
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pass $message
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}
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set message "browse history forward middle"
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set lines [test_lines_length "record instruction-history +" $message]
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if { $lines != $history_size } {
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fail $message
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} else {
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pass $message
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}
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set message "browse history forward last"
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set lines [test_lines_length "record instruction-history +" $message]
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if { $lines != 3 } {
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fail $message
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} else {
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pass $message
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}
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gdb_test "record instruction-history" "At the end of the branch trace record\\." "browse history forward beyond 1"
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# make sure we cannot move further
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gdb_test "record instruction-history" "At the end of the branch trace record\\." "browse history forward beyond 2"
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set message "browse history backward last"
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set lines [test_lines_length "record instruction-history -" $message]
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if { $lines != $history_size } {
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fail $message
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} else {
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pass $message
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}
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set message "browse history backward middle"
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set lines [test_lines_length "record instruction-history -" $message]
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if { $lines != $history_size } {
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fail $message
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} else {
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pass $message
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}
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set message "browse history backward first"
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set lines [test_lines_length "record instruction-history -" $message]
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if { $lines != 3 } {
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fail $message
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} else {
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pass $message
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}
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gdb_test "record instruction-history -" "At the start of the branch trace record\\." "browse history backward beyond 1"
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# make sure we cannot move further back
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gdb_test "record instruction-history -" "At the start of the branch trace record\\." "browse history backward beyond 2"
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