gdb/testsuite/gdb.reverse/consecutive-reverse.exp

#   Copyright 2008-2020 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# This file is part of the GDB testsuite.  It tests stepping over
# consecutive instructions in reverse.

if ![supports_reverse] {
    return
}

standard_testfile

if { [prepare_for_testing "failed to prepare" $testfile $srcfile] } {
    return -1
}

runto main

if [supports_process_record] {
    # Activate process record/replay
    gdb_test_no_output "record" "turn on process record"
}

set is_stmt [is_stmt_addresses $srcfile]

gdb_breakpoint foo
gdb_test "continue" "Breakpoint $decimal, foo .*" \
	"continue to breakpoint in foo"

set foo1_addr 0
set foo2_addr 0
set stop_addr 0

gdb_test_multiple "x /2i \$pc" "get breakpoint address for foo" {
    global hex
    global foo1_addr
    global foo2_addr
    global gdb_prompt

    -re "=> ($hex).*\[\r\n\]+   ($hex).*$gdb_prompt $" {
	set foo1_addr $expect_out(1,string)
	set foo2_addr $expect_out(2,string)
	pass "get breakpoint address for foo"
    }
}

gdb_test "break \*$foo2_addr" "Breakpoint $decimal at $foo2_addr: file .*" \
	"set bp, 2nd instr"

set testmsg "stopped at bp, 2nd instr"
gdb_test_multiple "step" $testmsg {
    -re -wrap "Breakpoint $decimal, ($hex) in foo.*" {
	set stop_addr $expect_out(1,string)
	if [eval expr "$foo2_addr == $stop_addr"] then {
	    pass "stopped at bp, 2nd instr"
	} else {
	    fail "stopped at bp, 2nd instr (wrong address)"
	}
    }
    -re -wrap "Breakpoint $decimal, foo.*" {
       set stop_addr [get_valueof "/x" "\$pc" "" "value of pc"]
       set stop_addr_is_stmt [hex_in_list $stop_addr $is_stmt]
       if { ! $stop_addr_is_stmt } {
           fail "stopped at bp, 2nd instr (missing hex prefix)"
       } elseif [eval expr "$foo2_addr == $stop_addr"] then {
           pass "stopped at bp, 2nd instr"
       } else {
           fail "stopped at bp, 2nd instr (wrong address)"
       }
    }
}

###
###
###

# Set reverse execution direction

gdb_test_no_output "set exec-dir reverse" "set reverse execution"

# Now step backward and hope to hit the first breakpoint.

set test_msg "stopped at bp in reverse, 1st instr"
gdb_test_multiple "step" "$test_msg" {
    -re "Breakpoint $decimal, ($hex) in foo.*$gdb_prompt $" {
	set stop_addr $expect_out(1,string)
	if [eval expr "$foo1_addr == $stop_addr"] then {
	    pass "$test_msg"
	} else {
	    fail "$test_msg (wrong address)"
	}
    }
    -re "Breakpoint $decimal, foo.*$gdb_prompt $" {
	gdb_test "print \$pc == $foo1_addr" \
	    "$decimal = 1" \
	    "$test_msg"
    }
}