ena-dis-br.exp

gdb-6.8 Linux下的调试程序 最新版本

# This testcase is part of GDB, the GNU debugger.

# Copyright 1997, 1998, 1999, 2003, 2004, 2007, 2008
# 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/>.

if $tracelevel then {
    strace $tracelevel
}

global usestubs

#
# test running programs
#
set prms_id 0
set bug_id 0

set testfile "break"
set srcfile ${testfile}.c
set srcfile1 ${testfile}1.c
set binfile ${objdir}/${subdir}/${testfile}

if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}0.o" object {debug nowarnings}] != "" } {
     untested ena-dis-br.exp
     return -1
}

if  { [gdb_compile "${srcdir}/${subdir}/${srcfile1}" "${binfile}1.o" object {debug nowarnings}] != "" } {
     untested ena-dis-br.exp
     return -1
}

if  { [gdb_compile "${binfile}0.o ${binfile}1.o" "${binfile}" executable {debug nowarnings}] != "" } {
     untested ena-dis-br.exp
     return -1
}

gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}

set bp_location1 [gdb_get_line_number "set breakpoint 1 here"]
set bp_location8 [gdb_get_line_number "set breakpoint 8 here" $srcfile1]
set bp_location9 [gdb_get_line_number "set breakpoint 9 here" $srcfile1]
set bp_location11 [gdb_get_line_number "set breakpoint 11 here"]
set bp_location13 [gdb_get_line_number "set breakpoint 13 here" $srcfile1]
set bp_location14 [gdb_get_line_number "set breakpoint 14 here" $srcfile1]
set bp_location15 [gdb_get_line_number "set breakpoint 15 here" $srcfile1]
set bp_location16 [gdb_get_line_number "set breakpoint 16 here" $srcfile1]
set bp_location17 [gdb_get_line_number "set breakpoint 17 here" $srcfile1]
set bp_location18 [gdb_get_line_number "set breakpoint 18 here" $srcfile1]

if ![runto_main] then { fail "enable/disable break tests suppressed" }

# Verify that we can set a breakpoint (the location is irrelevant),
# then enable it (yes, it's already enabled by default), then hit it.

proc break_at { breakpoint where } {
    global gdb_prompt
    global expect_out

    set test "break $breakpoint"
    set bp 0
    gdb_test_multiple "$test" "$test" {
	-re "Breakpoint (\[0-9\]*) at .*$where.*$gdb_prompt $" {
	    set bp $expect_out(1,string)
	    pass "$test"
	}
    }
    return $bp
}

set bp [break_at "marker1" " line ($bp_location15|$bp_location16)"]

gdb_test "enable $bp" "" "enable break marker1"

gdb_test "info break $bp" \
    "\[0-9\]*\[ \t\]+breakpoint\[ \t\]+keep\[ \t\]+y.*" \
    "info break marker1"

# See the comments in condbreak.exp for "run until breakpoint at
# marker1" for an explanation of the xfail below.
set test "continue to break marker1"
gdb_test_multiple "continue" "$test" {
    -re "Breakpoint \[0-9\]*, marker1.*$gdb_prompt $" {
	pass "$test"
    }
    -re "Breakpoint \[0-9\]*, $hex in marker1.*$gdb_prompt $" {
	xfail "$test"
    }
}

gdb_test "delete $bp" "" "delete break marker1"

# Verify that we can set a breakpoint to be self-disabling after the
# first time it triggers.
set bp [break_at "marker2" " line ($bp_location8|$bp_location9)"]

gdb_test "enable once $bp" "" "enable once break marker2"

gdb_test "info break $bp" \
    "\[0-9\]*\[ \t\]+breakpoint\[ \t\]+dis\[ \t\]+y.*" \
    "info auto-disabled break marker2"

# See the comments in condbreak.exp for "run until breakpoint at
# marker1" for an explanation of the xfail below.
set test "continue to auto-disabled break marker2"
gdb_test_multiple "continue" "$test" {
    -re "Breakpoint \[0-9\]*, marker2.*$gdb_prompt $" {
	pass "$test"
    }
    -re "Breakpoint \[0-9\]*, $hex in marker2.*$gdb_prompt $" {
	xfail "$test"
    }
}

gdb_test "info break $bp" \
    "\[0-9\]*\[ \t\]+breakpoint\[ \t\]+dis\[ \t\]+n.*" \
    "info auto-disabled break marker2"

# Verify that we don't stop at a disabled breakpoint.
gdb_continue_to_end "no stop"
rerun_to_main
gdb_continue_to_end "no stop at auto-disabled break marker2"

# Verify that we can set a breakpoint to be self-deleting after the
# first time it triggers.
if ![runto_main] then {
    fail "enable/disable break tests suppressed"
}

set bp [break_at "marker3" " line ($bp_location17|$bp_location18)"]

gdb_test "enable del $bp" "" "enable del break marker3"

gdb_test "info break $bp" \
    "\[0-9\]*\[ \t\]+breakpoint\[ \t\]+del\[ \t\]+y.*" \
    "info auto-deleted break marker2"

gdb_test "continue" \
    ".*marker3 .*:($bp_location17|$bp_location18).*" \
    "continue to auto-deleted break marker3"

gdb_test "info break $bp" \
    ".*No breakpoint or watchpoint number.*" \
    "info auto-deleted break marker3"

# Verify that we can set a breakpoint and manually disable it (we've
# already proven that disabled bp's don't trigger).

set bp [break_at "marker4" " line ($bp_location14|$bp_location13).*"]

gdb_test "disable $bp" "" "disable break marker4"

gdb_test "info break $bp" \
    "\[0-9\]*\[ \t\]+breakpoint\[ \t\]+keep\[ \t\]+n.*" \
    "info break marker4"

# Verify that we can set a breakpoint with an ignore count N, which
# should cause the next N triggers of the bp to be ignored.  (This is
# a flavor of enablement/disablement, after all.)

if ![runto_main] then {
    fail "enable/disable break tests suppressed"
}

set bp [break_at "marker1" " line ($bp_location15|$bp_location16).*"]

# Verify that an ignore of a non-existent breakpoint is gracefully
# handled.

gdb_test "ignore 999 2" \
    "No breakpoint number 999..*" \
    "ignore non-existent break"

# Verify that a missing ignore count is gracefully handled.

gdb_test "ignore $bp" \
    "Second argument .specified ignore-count. is missing..*" \
    "ignore break with missing ignore count"

# Verify that a negative or zero ignore count is handled gracefully
# (they both are treated the same).

gdb_test "ignore $bp -1" \
    "Will stop next time breakpoint \[0-9\]* is reached..*" \
    "ignore break marker1 -1"

gdb_test "ignore $bp 0" \
    "Will stop next time breakpoint \[0-9\]* is reached..*" \
    "ignore break marker1 0"

gdb_test "ignore $bp 1" \
    "Will ignore next crossing of breakpoint \[0-9\]*.*" \
    "ignore break marker1"

gdb_test "info break $bp" \
    "\[0-9\]*\[ \t\]+breakpoint\[ \t\]+keep\[ \t\]+y.*ignore next 1 hits.*" \
    "info ignored break marker1"

gdb_continue_to_end "no stop at ignored break marker1"
rerun_to_main

# See the comments in condbreak.exp for "run until breakpoint at marker1" 
# for an explanation of the xfail below.
set test "continue to break marker1, 2nd time"
gdb_test_multiple "continue" "$test" {
    -re "Breakpoint \[0-9\]*, marker1.*$gdb_prompt $" {
	pass "continue to break marker1, 2nd time"
    }
    -re "Breakpoint \[0-9\]*, $hex in marker1.*$gdb_prompt $" {
	xfail "continue to break marker1, 2nd time"
    }
}

# Verify that we can specify both an ignore count and an auto-delete.

if ![runto_main] then {
    fail "enable/disable break tests suppressed"
}

set bp [break_at marker1 " line ($bp_location15|$bp_location16).*"]

gdb_test "ignore $bp 1" \
    "Will ignore next crossing of breakpoint \[0-9\]*.*" \
    "ignore break marker1"

gdb_test "enable del $bp" "" "enable del break marker1"

gdb_test "info break $bp" \
    "\[0-9\]*\[ \t\]+breakpoint\[ \t\]+del\[ \t\]+y.*ignore next 1 hits.*" \
    "info break marker1"

gdb_continue_to_end "no stop at ignored & auto-deleted break marker1"
rerun_to_main

gdb_test "continue" \
    ".*marker1 .*:($bp_location15|$bp_location16).*" \
    "continue to ignored & auto-deleted break marker1"

# Verify that a disabled breakpoint's ignore count isn't updated when
# the bp is encountered.

if ![runto_main] then {
    fail "enable/disable break tests suppressed"
}

set bp [break_at marker1 " line ($bp_location15|$bp_location16)"]

gdb_test "ignore $bp 10" \
    "Will ignore next 10 crossings of breakpoint \[0-9\]*.*" \
    "ignore break marker1"

gdb_test "disable $bp" "" "disable break marker1"

gdb_continue_to_end "no stop at ignored & disabled break marker1"
rerun_to_main

gdb_test "info break $bp" \
    "\[0-9\]*\[ \t\]+breakpoint\[ \t\]+keep\[ \t\]+n.*ignore next 10 hits.*" \
    "info ignored & disabled break marker1"

# Verify that GDB correctly handles the "continue" command with an argument,
# which is an ignore count to set on the currently stopped-at breakpoint.
# (Also verify that GDB gracefully handles the case where the inferior
# isn't stopped at a breakpoint.)
#
if ![runto_main] then { fail "enable/disable break tests suppressed" }

gdb_test "break $bp_location1" \
    "Breakpoint \[0-9\]*.*, line $bp_location1.*" \
    "prepare to continue with ignore count"

gdb_test "continue 2" \
    "Will ignore next crossing of breakpoint \[0-9\]*.  Continuing..*" \
    "continue with ignore count"

gdb_test "next" ".*$bp_location11\[ \t\]*marker1.*" \
    step after continue with ignore count"

set test "continue with ignore count, not stopped at bpt"
gdb_test_multiple "continue 2" "$test" {
    -re "Not stopped at any breakpoint; argument ignored.*$gdb_prompt $" {
	pass "$test"
    }
    -re "No breakpoint number -1.*$gdb_prompt $" {
	kfail gdb/1689 "$test"
    }
}

gdb_exit
return 0