Subversion Repositories openrisc_2011-10-31

# Copyright 1992, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2007, 2008, 2009,

# 2010 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 .

# This file was written by Fred Fish. (fnf@cygnus.com)

if $tracelevel then {

    strace $tracelevel

}

set testfile "watchpoint"

set srcfile ${testfile}.c

set binfile ${objdir}/${subdir}/${testfile}

set wp_set 1

if [get_compiler_info ${binfile}] {

    return -1

}

if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {

     untested watchpoint.exp

     return -1

}

# Prepare for watchpoint tests by setting up two breakpoints and one

# watchpoint.

#

# We use breakpoints at marker functions to get past all the startup code,

# so we can get to the watchpoints in a reasonable amount of time from a

# known starting point.

#

# For simplicity, so we always know how to reference specific breakpoints or

# watchpoints by number, we expect a particular ordering and numbering of

# each in the combined breakpoint/watchpoint table, as follows:

#

#       Number          What            Where

#       1               Breakpoint      marker1()

#       2               Breakpoint      marker2()

#       3               Watchpoint      ival3

proc initialize {} {

    global gdb_prompt

    global hex

    global decimal

    global srcfile

    global wp_set

    # Disable hardware watchpoints if necessary.

    if [target_info exists gdb,no_hardware_watchpoints] {

        gdb_test_no_output "set can-use-hw-watchpoints 0" ""

    }

    if [gdb_test "break marker1" "Breakpoint 1 at $hex: file .*$srcfile, line $decimal.*" "set breakpoint at marker1" ] {

      return 0;

    }

    if [gdb_test "break marker2" "Breakpoint 2 at $hex: file .*$srcfile, line $decimal.*" "set breakpoint at marker2" ] {

      return 0;

    }

    if [gdb_test "info break" "1\[ \]*breakpoint.*marker1.*\r\n2\[ \]*breakpoint.*marker2.*" "info break in watchpoint.exp" ] {

      return 0;

    }

    # ??rehrauer: To fix DTS #CHFts23014, in which setting a watchpoint

    # before running can cause the inferior to croak on HP-UX 11.0 for

    # reasons yet unknown, we've disabled the ability to set watches

    # without a running inferior.  Verify the restriction.

    #

    send_gdb "watch ival3\n"

    gdb_expect {

        -re ".*\[Ww\]atchpoint 3: ival3.*$gdb_prompt $" {

            pass "set watchpoint on ival3"

        }

        -re "warning: can't do that without a running program; try \"break main\", \"run\" first.*$gdb_prompt $" {

            pass "set watchpoint on ival3"

            set wp_set 0

            return 1

        }

        timeout {

            fail "(timeout) set watchpoint on ival3"

            return 0

        }

    }

    if [gdb_test "info watch" "3\[ \]*.*watchpoint.*ival3" "watchpoint found in watchpoint/breakpoint table" ] {

      return 0;

    }

    # After installing the watchpoint, we disable it until we are ready

    # to use it.  This allows the test program to run at full speed until

    # we get to the first marker function.

    if [gdb_test "disable 3" "disable 3\[\r\n\]+" "disable watchpoint" ] {

      return 0;

    }

    return 1

}

#

# Test simple watchpoint.

#

proc test_simple_watchpoint {} {

    global gdb_prompt

    global hex

    global decimal

    global wp_set

    # Ensure that the watchpoint is disabled when we startup.

    if { $wp_set } {

        if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint in test_simple_watchpoint" ] {

            return 0;

        }

    }

    # Run until we get to the first marker function.

    gdb_run_cmd

    set timeout 600

    gdb_expect {

        -re "Breakpoint 1, marker1 .*$gdb_prompt $" {

            pass "run to marker1 in test_simple_watchpoint"

        }

        -re ".*$gdb_prompt $" {

            fail "run to marker1 in test_simple_watchpoint"

            return

        }

        timeout {

            fail "run to marker1 in test_simple_watchpoint (timeout)"

            return

        }

    }

    if { !$wp_set } {

        # ??rehrauer: To fix DTS #CHFts23014, in which setting a watchpoint

        # before running can cause the inferior to croak on HP-UX 11.0

        # for reasons yet unknown, we've disabled the ability to set

        # watches without a running inferior.  The following testpoints used

        # to be in [initialize].

        #

        gdb_test "watch ival3" \

            "\[Ww\]atchpoint 3: ival3" \

            "set watchpoint on ival3"

        set wp_set 1

        gdb_test "info watch" \

            "3\[ \]*.*watchpoint.*ival3" \

            "watchpoint found in watchpoint/breakpoint table"

        # After installing the watchpoint, we disable it until we are ready

        # to use it.  This allows the test program to run at full speed until

        # we get to the first marker function.

        gdb_test "disable 3" "disable 3" "disable watchpoint"

    }

    # After reaching the marker function, enable the watchpoint.

    if [gdb_test "enable 3" "^enable 3\[\r\n\]+" "enable watchpoint" ] {

      return ;

    }

    gdb_test "break func1" "Breakpoint.*at.*"

    gdb_test_no_output "set \$func1_breakpoint_number = \$bpnum"

    gdb_test "continue" "Continuing.*Breakpoint \[0-9\]*, func1.*" \

        "continue to breakpoint at func1"

    # Continue until the first change, from -1 to 0

    send_gdb "cont\n"

    gdb_expect {

        -re "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = -1.*New value = 0.*ival3 = count; ival4 = count;.*$gdb_prompt $" {

            pass "watchpoint hit, first time"

        }

        -re "Continuing.*Breakpoint.*func1.*$gdb_prompt $" {

            setup_xfail "m68*-*-*" 2597

            fail "thought it hit breakpoint at func1 twice"

            gdb_test_no_output "delete \$func1_breakpoint_number"

            gdb_test "continue" "\

Continuing.*\[Ww\]atchpoint.*ival3.*Old value = -1.*New value = 0.*ival3 = count;" \

                "watchpoint hit, first time"

        }

        -re ".*$gdb_prompt $" { fail "watchpoint hit, first time" ; return }

        timeout { fail "watchpoint hit, first time (timeout)" ; return }

        eof { fail "watchpoint hit, first time (eof)" ; return }

    }

    # Check that the hit count is reported correctly

    gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 1 time.*" "Watchpoint hit count is 1"

    gdb_test_no_output "delete \$func1_breakpoint_number"

    # Continue until the next change, from 0 to 1.

    gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 0.*New value = 1.*ival3 = count; ival4 = count;.*" "watchpoint hit, second time"

    # Check that the hit count is reported correctly

    gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 2 times.*" "Watchpoint hit count is 2"

    # Continue until the next change, from 1 to 2.

    gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 1.*New value = 2.*ival3 = count; ival4 = count;.*" "watchpoint hit, third time"

    # Check that the hit count is reported correctly

    gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 3 times.*" "Watchpoint hit count is 3"

    # Continue until the next change, from 2 to 3.

    gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 2.*New value = 3.*ival3 = count; ival4 = count;.*" "watchpoint hit, fourth time"

    # Check that the hit count is reported correctly

    gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 4 times.*" "Watchpoint hit count is 4"

    # Continue until the next change, from 3 to 4.

    # Note that this one is outside the loop.

    gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 3.*New value = 4.*ival3 = count; ival4 = count;.*" "watchpoint hit, fifth time"

    # Check that the hit count is reported correctly

    gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 5 times.*" "Watchpoint hit count is 5"

    # Continue until we hit the finishing marker function.

    # Make sure we hit no more watchpoints.

    gdb_test "cont" "Continuing.*Breakpoint.*marker2 \(\).*" \

        "continue to marker2"

    # Disable the watchpoint so we run at full speed until we exit.

    if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "watchpoint disabled" ] {

      return ;

    }

    # Run until process exits.

    if [target_info exists gdb,noresults] { return }

    gdb_continue_to_end "continue to exit in test_simple_watchpoint"

}

# Test disabling watchpoints.

proc test_disabling_watchpoints {} {

    global gdb_prompt

    global binfile

    global srcfile

    global decimal

    global hex

    # "info watch" is the same as "info break"

    gdb_test "info watch" "\[0-9]+\[ \]*.*watchpoint.*ival3\r\n\.*\[0-9\]+ times.*" "watchpoints found in watchpoint/breakpoint table"

    # Ensure that the watchpoint is disabled when we startup.

    if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint in test_disabling_watchpoints" ] {

      return 0;

    }

    # Run until we get to the first marker function.

    gdb_run_cmd

    set timeout 600

    gdb_expect {

        -re "Breakpoint 1, marker1 .*$gdb_prompt $" {

            pass "run to marker1 in test_disabling_watchpoints"

        }

        -re ".*$gdb_prompt $" {

            fail "run to marker1 in test_disabling_watchpoints"

            return

        }

        timeout {

            fail "run to marker1 in test_disabling_watchpoints (timeout)"

            return

        }

    }

    # After reaching the marker function, enable the watchpoint.

    if [gdb_test "enable 3" "^enable 3\[\r\n\]+" "watchpoint enabled" ] {

      return ;

    }

    # Continue until the first change, from -1 to 0

    # Don't check the old value, because on VxWorks the variable value

    # will not have been reinitialized.

    gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = .*New value = 0.*ival3 = count; ival4 = count;.*" "watchpoint hit in test_disabling_watchpoints, first time"

    # Continue until the next change, from 0 to 1.

    gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 0.*New value = 1.*ival3 = count; ival4 = count;.*" "watchpoint hit in test_disabling_watchpoints, second time"

    # Disable the watchpoint but leave breakpoints

    if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint #2 in test_disabling_watchpoints" ] {

      return 0;

    }

    # Check watchpoint list, looking for the entry that confirms the

    # watchpoint is disabled.

    gdb_test "info watchpoints" "\[0-9]+\[ \]*.*watchpoint\[ \]*keep\[ \]*n\[ \]*ival3\r\n.*" "watchpoint disabled in table"

    # Continue until we hit the finishing marker function.

    # Make sure we hit no more watchpoints.

    gdb_test "cont" "Continuing.*Breakpoint.*marker2 \\(\\).*" \

        "disabled watchpoint skipped"

    if [target_info exists gdb,noresults] { return }

    gdb_continue_to_end "continue to exit in test_disabling_watchpoints"

}

# Test stepping and other mundane operations with watchpoints enabled

proc test_stepping {} {

    global gdb_prompt

    if [runto marker1] then {

        gdb_test "watch ival2" ".*\[Ww\]atchpoint \[0-9\]*: ival2"

        # Well, let's not be too mundane.  It should be a *bit* of a challenge

        gdb_test "break func2 if 0" "Breakpoint.*at.*"

        gdb_test "p \$func2_breakpoint_number = \$bpnum" " = .*"

        gdb_test "p func1 ()" "= 73" \

            "calling function with watchpoint enabled"

        #

        # "finish" brings us back to main.

        # On some targets (e.g. alpha) gdb will stop from the finish in midline

        # of the marker1 call. This is due to register restoring code on

        # the alpha and might be caused by stack adjustment instructions

        # on other targets. In this case we will step once more.

        #

        send_gdb "finish\n"

        gdb_expect {

            -re "Run.*exit from.*marker1.* at" {

                pass "finish from marker1"

            }

            default { fail "finish from marker1 (timeout)" ; return }

        }

        gdb_expect {

            -re "marker1 \\(\\);.*$gdb_prompt $" {

                send_gdb "step\n"

                exp_continue

            }

            -re "func1 \\(\\);.*$gdb_prompt $" {

                pass "back at main from marker1"

            }

            -re ".*$gdb_prompt $" {

                fail "back at main from marker1"

            }

            default { fail "back at main from marker1 (timeout)" ; return }

        }

        gdb_test "next" "for \\(count = 0.*" "next to `for' in watchpoint.exp"

        # Now test that "until" works.  It's a bit tricky to test

        # "until", because compilers don't always arrange the code

        # exactly the same way, and we might get slightly different

        # sequences of statements.  But the following should be true

        # (if not it is a compiler or a debugger bug): The user who

        # does "until" at every statement of a loop should end up

        # stepping through the loop once, and the debugger should not

        # stop for any of the remaining iterations.

        gdb_test "until" "ival1 = count.*" "until to ival1 assignment"

        gdb_test "until" "ival3 = count.*" "until to ival3 assignment"

        send_gdb "until\n"

        gdb_expect {

            -re "(for \\(count = 0|\}).*$gdb_prompt $" {

                gdb_test "until" "ival1 = count; /. Outside loop ./" \

                    "until out of loop"

            }

            -re "ival1 = count; /. Outside loop ./.*$gdb_prompt $" {

                pass "until out of loop"

            }

            -re ".*$gdb_prompt $" {

                fail "until out of loop"

            }

            default { fail "until out of loop (timeout)" ; return }

        }

        gdb_test "step" "ival2 = count.*" "step to ival2 assignment"

    }

}

# Test stepping and other mundane operations with watchpoints enabled

proc test_watchpoint_triggered_in_syscall {} {

    global gdb_prompt

    # These tests won't work without printf support.

    if [gdb_skip_stdio_test "watchpoints triggered in syscall"] {

        return;

    }

    # Run until we get to the first marker function.

    set x 0

    set y 0

    set testname "Watch buffer passed to read syscall"

    if [runto marker2] then {

        gdb_test "watch buf\[0\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[0\\\]"

        gdb_test "watch buf\[1\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[1\\\]"

        gdb_test "watch buf\[2\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[2\\\]"

        gdb_test "watch buf\[3\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[3\\\]"

        gdb_test "watch buf\[4\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[4\\\]"

        gdb_test "break marker4" ".*Breakpoint.*"

        gdb_test_no_output "set doread = 1"

        # If we send_gdb "123\n" before gdb has switched the tty, then it goes

        # to gdb, not the inferior, and we lose.  So that is why we have

        # watchpoint.c prompt us, so we can wait for that prompt.

        send_gdb "continue\n";

        gdb_expect {

            -re "Continuing\\.\r\ntype stuff for buf now:" {

                pass "continue to read"

            }

            default {

                fail "continue to read";

                return ;

            }

        }

        send_gdb "123\n"

        gdb_expect {

            -re ".*\[Ww\]atchpoint.*buf\\\[0\\\].*Old value = 0.*New value = 49\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }

            -re ".*\[Ww\]atchpoint.*buf\\\[1\\\].*Old value = 0.*New value = 50\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }

            -re ".*\[Ww\]atchpoint.*buf\\\[2\\\].*Old value = 0.*New value = 51\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }

            -re ".*\[Ww\]atchpoint.*buf\\\[3\\\].*Old value = 0.*New value = 10\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }

            -re ".*$gdb_prompt $" { pass "sent 123" }

            timeout { fail "sent 123 (timeout)" }

        }

        # Examine the values in buf to see how many watchpoints we

        # should have printed.

        send_gdb "print buf\[0\]\n"

        gdb_expect {

            -re ".*= 49.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[0\]"}

            -re ".*= 0.*$gdb_prompt $" { pass "print buf\[0\]"}

            -re ".*$gdb_prompt $" { fail "print buf\[0\]"}

            default { fail "print buf\[0\]"}

        }

        send_gdb "print buf\[1\]\n"

        gdb_expect {

            -re ".*= 50.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[1\]"}

            -re ".*= 0.*$gdb_prompt $" { pass "print buf\[1\]"}

            -re ".*$gdb_prompt $" { fail "print buf\[1\]"}

            default { fail "print buf\[1\]"}

        }

        send_gdb "print buf\[2\]\n"

        gdb_expect {

            -re ".*= 51.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[2\]"}

            -re ".*= 0.*$gdb_prompt $" { pass "print buf\[2\]"}

            -re ".*$gdb_prompt $" { fail "print buf\[2\]"}

            default { fail "print buf\[2\]"}

        }

        send_gdb "print buf\[3\]\n"

        gdb_expect {

            -re ".*= 10.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[3\]"}

            -re ".*= 0.*$gdb_prompt $" { pass "print buf\[3\]"}

            -re ".*$gdb_prompt $" { fail "print buf\[3\]" }

            default { fail "print buf\[3\]" }

        }

        # Did we find what we were looking for?  If not, flunk it.

        if [expr $x==$y] then { pass $testname } else { fail "$testname (only triggered $x watchpoints, expected $y)"}

        # Continue until we hit the finishing marker function.

        # Make sure we hit no more watchpoints.

        gdb_test "cont" "Continuing.*Breakpoint.*marker4 \\(\\).*" \

            "continue to marker4"

        # Disable everything so we can finish the program at full speed

        gdb_test_no_output "disable" "disable in test_watchpoint_triggered_in_syscall"

        if [target_info exists gdb,noresults] { return }

        gdb_continue_to_end "continue to exit in test_watchpoint_triggered_in_syscall"

    }

}

# Do a simple test of of watching through a pointer when the pointer

# itself changes.  Should add some more complicated stuff here.

proc test_complex_watchpoint {} {

    global gdb_prompt

    if [runto marker4] then {

        gdb_test "watch ptr1->val" ".*\[Ww\]atchpoint \[0-9\]*: ptr1->val"

        gdb_test "break marker5" ".*Breakpoint.*"

        gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ptr1->val.*Old value = 1.*New value = 2.*" "Test complex watchpoint"

        # Continue until we hit the marker5 function.

        # Make sure we hit no more watchpoints.

        gdb_test "cont" "Continuing.*Breakpoint.*marker5 \\(\\).*" \

            "did not trigger wrong watchpoint"

        # Test watches of things declared locally in a function.

        # In particular, test that a watch of stack-based things

        # is deleted when the stack-based things go out of scope.

        #

        gdb_test_no_output "disable" "disable in test_complex_watchpoint"

        gdb_test "break marker6" ".*Breakpoint.*"

        gdb_test "cont" "Continuing.*Breakpoint.*marker6 \\(\\).*" \

            "continue to marker6"

        gdb_test "break func2" ".*Breakpoint.*"

        gdb_test "cont" "Continuing.*func2.*"

        # Test a watch of a single stack-based variable, whose scope

        # is the function we're now in.  This should auto-delete when

        # execution exits the scope of the watchpoint.

        #

        gdb_test "watch local_a" ".*\[Ww\]atchpoint \[0-9\]*: local_a" "set local watch"

        gdb_test "cont" "\[Ww\]atchpoint.*local_a.*" "trigger local watch"

        gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" "self-delete local watch"

        gdb_test "cont" "Continuing.*func2.*"

        # We should be in "func2" again now.  Test a watch of an

        # expression which includes both a stack-based local and

        # something whose scope is larger than this invocation

        # of "func2".  This should also auto-delete.

        #

        gdb_test "watch local_a + ival5" ".*\[Ww\]atchpoint \[0-9\]*: local_a . ival5" \

                 "set partially local watch"

        gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_a . ival5.*" \

                 "trigger1 partially local watch"

        gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_a . ival5.*" \

                 "trigger2 partially local watch"

        gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" \

                 "self-delete partially local watch"

        # We should be in "func2" again now.  Test a watch of a

        # static (non-stack-based) local.  Since this has scope

        # across any invocations of "func2", it should not auto-

        # delete.

        #

        gdb_test "cont" "Continuing.*func2.*"

        gdb_test "watch static_b" ".*\[Ww\]atchpoint \[0-9\]*: static_b" \

                 "set static local watch"

        gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: static_b.*" \

                 "trigger static local watch"

        gdb_test "cont" "Continuing.*marker6 \\(\\).*" \

                 "continue after trigger static local watch"

        gdb_test "info break" ".*watchpoint.*static_b.*" \

                 "static local watch did not self-delete"

        # We should be in "recurser" now.  Test a watch of a stack-

        # based local.  Symbols mentioned in a watchpoint are bound

        # at watchpoint-creation.  Thus, a watch of a stack-based

        # local to a recursing function should be bound only to that

        # one invocation, and should not trigger for other invocations.

        #

        gdb_test "tbreak recurser" ".*breakpoint.*"

        gdb_test "cont" "Continuing.*recurser.*"

        gdb_test "watch local_x" ".*\[Ww\]atchpoint \[0-9\]*: local_x" \

                 "set local watch in recursive call"

        gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_x.*New value = 2.*" \

                 "trigger local watch in recursive call"

        gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" \

                 "self-delete local watch in recursive call"

        # Disable everything so we can finish the program at full speed

        gdb_test_no_output "disable" "disable in test_complex_watchpoint"

        if [target_info exists gdb,noresults] { return }

        gdb_continue_to_end "continue to exit in test_complex_watchpoint"

    }

}

proc test_watchpoint_and_breakpoint {} {

    global gdb_prompt

    # This is a test for PR gdb/38, which involves setting a

    # watchpoint right after you've reached a breakpoint.

    if [runto func3] then {

        gdb_breakpoint [gdb_get_line_number "second x assignment"]

        gdb_continue_to_breakpoint "second x assignment"

        gdb_test "watch x" ".*atchpoint \[0-9\]+: x"

        gdb_test_multiple "next" "next after watch x" {

            -re ".*atchpoint \[0-9\]+: x\r\n\r\nOld value = 0\r\nNew value = 1\r\n.*$gdb_prompt $" {

                pass "next after watch x"

            }

            -re "\[0-9\]+\[\t \]+y = 1;\r\n$gdb_prompt $" {

                kfail "gdb/38" "next after watch x"

            }

        }

    }

}

proc test_constant_watchpoint {} {

    gdb_test "watch 5" "Cannot watch constant value `5'." "number is constant"

    gdb_test "watch marker1" "Cannot watch constant value `marker1'." \

    "marker1 is constant"

    gdb_test "watch count + 6" ".*atchpoint \[0-9\]+: count \\+ 6"

    gdb_test_no_output "delete \$bpnum" "delete watchpoint `count + 6'"

    gdb_test "watch 7 + count" ".*atchpoint \[0-9\]+: 7 \\+ count"

    gdb_test_no_output "delete \$bpnum" "delete watchpoint `7 + count'"

}

proc test_inaccessible_watchpoint {} {

    global gdb_prompt

    # This is a test for watchpoints on currently inaccessible (but later

    # valid) memory.

    if [runto func4] then {

        # Make sure we only allow memory access errors.

        set msg "watchpoint refused to insert on nonexistent struct member"

        gdb_test_multiple "watch struct1.nosuchmember" $msg {

            -re ".*atchpoint \[0-9\]+: struct1.nosuchmember.*$gdb_prompt $" {

                # PR breakpoints/9681

                fail $msg

            }

            -re "There is no member named nosuchmember\\..*$gdb_prompt $" {

                pass $msg

            }

        }

        gdb_test "watch *global_ptr" ".*atchpoint \[0-9\]+: \\*global_ptr"

        gdb_test "set \$global_ptr_breakpoint_number = \$bpnum" ""

        gdb_test "next" ".*global_ptr = buf.*" "global_ptr next"

        gdb_test_multiple "next" "next over ptr init" {

            -re ".*atchpoint \[0-9\]+: \\*global_ptr\r\n\r\nOld value = .*\r\nNew value = 3 .*\r\n.*$gdb_prompt $" {

                # We can not test for  here because NULL may be readable.

                # This test does rely on *NULL != 3.

                pass "next over ptr init"

            }

        }

        gdb_test_multiple "next" "next over buffer set" {

            -re ".*atchpoint \[0-9\]+: \\*global_ptr\r\n\r\nOld value = 3 .*\r\nNew value = 7 .*\r\n.*$gdb_prompt $" {

                pass "next over buffer set"

            }

        }

        gdb_test "delete \$global_ptr_breakpoint_number" ""

        gdb_test "watch **global_ptr_ptr" ".*atchpoint \[0-9\]+: \\*\\*global_ptr_ptr"

        gdb_test "set \$global_ptr_ptr_breakpoint_number = \$bpnum" ""

        gdb_test "next" ".*global_ptr_ptr = &global_ptr.*" "gloabl_ptr_ptr next"

        gdb_test "next" ".*atchpoint \[0-9\]+: \\*\\*global_ptr_ptr\[\r\n\]+Old value = .*\r\nNew value = 7 .*" "next over global_ptr_ptr init"

        gdb_test "next" ".*atchpoint \[0-9\]+: \\*\\*global_ptr_ptr\[\r\n\]+Old value = 7 .*\r\nNew value = 9 .*" "next over global_ptr_ptr buffer set"

        gdb_test "next" ".*atchpoint \[0-9\]+: \\*\\*global_ptr_ptr\[\r\n\]+Old value = 9 .*\r\nNew value = 5 .*" "next over global_ptr_ptr pointer advance"

        gdb_test_no_output "delete \$global_ptr_ptr_breakpoint_number"

    }

}

proc test_watchpoint_in_big_blob {} {

    global gdb_prompt

    gdb_test "watch buf" ".*atchpoint \[0-9\]+: buf"

    gdb_test "cont" "Continuing.*atchpoint \[0-9\]+: buf\r\n\r\nOld value = .*testte\".*" "watchpoint on buf hit"

}

# Start with a fresh gdb.

gdb_exit

gdb_start

gdb_reinitialize_dir $srcdir/$subdir

gdb_load $binfile

set prev_timeout $timeout

set timeout 600

verbose "Timeout now 600 sec.\n"

if [initialize] then {

    test_simple_watchpoint

    # The IDT/sim monitor only has 8 (!) open files, of which it uses

    # 4 (!).  So we have to make sure one program exits before

    # starting another one.

    if [istarget "mips-idt-*"] then {

        gdb_exit

        gdb_start

        gdb_reinitialize_dir $srcdir/$subdir

        gdb_load $binfile

        initialize

    }

    test_disabling_watchpoints

    # See above.

    if [istarget "mips-idt-*"] then {

        gdb_exit

        gdb_start

        gdb_reinitialize_dir $srcdir/$subdir

        gdb_load $binfile

        initialize

    }

    if ![target_info exists gdb,cannot_call_functions] {

        test_stepping

        # See above.

        if [istarget "mips-idt-*"] then {

            gdb_exit

            gdb_start

            gdb_reinitialize_dir $srcdir/$subdir

            gdb_load $binfile

            initialize

        }

    }

    # Only enabled for some targets merely because it has not been tested

    # elsewhere.

    # On sparc-sun-sunos4.1.3, GDB was running all the way to the marker4

    # breakpoint before stopping for the watchpoint.  I don't know why.

    if {[istarget "hppa*-*-*"]} then {

        test_watchpoint_triggered_in_syscall

    }

    # See above.

    if [istarget "mips-idt-*"] then {

        gdb_exit

        gdb_start

        gdb_reinitialize_dir $srcdir/$subdir

        gdb_load $binfile

        initialize

    }

    # Only enabled for some targets merely because it has not been tested

    # elsewhere.

    if {[istarget "hppa*-*-*"] || \

            [istarget "sparc*-*-sunos*"] || \

            [istarget "m32r-*-*"]} then {

        test_complex_watchpoint

    }

    # Verify that a user can force GDB to use "slow" watchpoints.

    # (This proves rather little on kernels that don't support

    # fast watchpoints, but still...)

    #

    if ![runto_main] then { fail "watch tests suppressed" }

    send_gdb "set can-use-hw-watchpoints 0\n"

    gdb_expect {

      -re "$gdb_prompt $"\

              {pass "disable fast watches"}

      timeout {fail "(timeout) disable fast watches"}

    }

    send_gdb "show can-use-hw-watchpoints\n"

    gdb_expect {

      -re "Debugger's willingness to use watchpoint hardware is 0.*$gdb_prompt $"\

              {pass "show disable fast watches"}

      -re "$gdb_prompt $"\

              {fail "show disable fast watches"}

      timeout {fail "(timeout) show disable fast watches"}

    }

    send_gdb "watch ival3 if  count > 1\n"

    gdb_expect {

      -re "Watchpoint \[0-9\]*: ival3.*$gdb_prompt $"\

              {pass "set slow conditional watch"}

      -re "$gdb_prompt $"\

              {fail "set slow conditional watch"}

      timeout {fail "(timeout) set slow conditional watch"}

    }

    send_gdb "continue\n"

    gdb_expect {

      -re "Watchpoint \[0-9\]*: ival3.*Old value = 1.*New value = 2.*$gdb_prompt $"\

              {pass "trigger slow conditional watch"}

      -re "$gdb_prompt $"\

              {fail "trigger slow conditional watch"}

      timeout {fail "(timeout) trigger slow conditional watch"}

    }

    # We've explicitly disabled hardware watches.  Verify that GDB

    # refrains from using them.

    #

    send_gdb "rwatch ival3\n"

    gdb_expect {

      -re "Expression cannot be implemented with read/access watchpoint..*$gdb_prompt $"\

              {pass "rwatch disallowed when can-set-hw-watchpoints cleared"}

      -re "$gdb_prompt $"\

              {fail "rwatch disallowed when can-set-hw-watchpoints cleared"}

      timeout {fail "(timeout) rwatch disallowed when can-use-hw-watchpoints cleared"}

    }

    # Read- and access watchpoints are unsupported on HP-UX.  Verify

    # that GDB gracefully responds to requests to create them.

    #

    if [istarget "hppa*-*-hpux*"] then {

      send_gdb "set can-use-hw-watchpoints 1\n"

      gdb_expect {

        -re "$gdb_prompt $"\

                {pass "enable fast watches"}

        timeout {fail "(timeout) enable fast watches"}

      }

      send_gdb "rwatch ival3\n"

      gdb_expect {

        -re "Target does not have this type of hardware watchpoint support.*$gdb_prompt $"\

                {pass "read watches disallowed"}

        -re "$gdb_prompt $"\

                {fail "read watches disallowed"}

        timeout {fail "(timeout) read watches disallowed"}

      }

      send_gdb "awatch ival3\n"

      gdb_expect {

        -re "Target does not have this type of hardware watchpoint support.*$gdb_prompt $"\

                {pass "access watches disallowed"}

        -re "$gdb_prompt $"\

                {fail "access watches disallowed"}

        timeout {fail "(timeout) access watches disallowed"}

      }

    }

    test_inaccessible_watchpoint

    # See above.

    if [istarget "mips-idt-*"] then {

        gdb_exit

        gdb_start

        gdb_reinitialize_dir $srcdir/$subdir

        gdb_load $binfile

        initialize

    }

    test_watchpoint_and_breakpoint

    test_watchpoint_in_big_blob

    # See above.

    if [istarget "mips-idt-*"] then {

        clean_restart

    }

    test_constant_watchpoint

}

# Restore old timeout

set timeout $prev_timeout

verbose "Timeout now $timeout sec.\n"