-# Copyright 1992, 1994, 1995, 1996, 1997, 1998, 1999, 2000
-# Free Software Foundation, Inc.
+# Copyright 1992-2016 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 2 of the License, or
+# 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, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
-# Please email any bugs, comments, and/or additions to this file to:
-# bug-gdb@prep.ai.mit.edu
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
# This file was written by Fred Fish. (fnf@cygnus.com)
-if $tracelevel then {
- strace $tracelevel
-}
-
-set prms_id 0
-set bug_id 0
-
-set testfile "watchpoint"
-set srcfile ${testfile}.c
-set binfile ${objdir}/${subdir}/${testfile}
-set wp_set 1
+standard_testfile
-if [get_compiler_info ${binfile}] {
+if [get_compiler_info] {
return -1
}
if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
- gdb_suppress_entire_file "Testcase compile failed, so all tests in this file will automatically fail."
+ untested watchpoint.exp
+ return -1
}
+# True if we're forcing no hardware watchpoints.
+set no_hw 0
+
# Prepare for watchpoint tests by setting up two breakpoints and one
# watchpoint.
#
global hex
global decimal
global srcfile
- global wp_set
-
- # Disable hardware watchpoints if necessary.
- if [target_info exists gdb,no_hardware_watchpoints] {
- gdb_test "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;
+ return 0
}
if [gdb_test "break marker2" "Breakpoint 2 at $hex: file .*$srcfile, line $decimal.*" "set breakpoint at marker2" ] {
- return 0;
+ return 0
}
if [gdb_test "info break" "1\[ \]*breakpoint.*marker1.*\r\n2\[ \]*breakpoint.*marker2.*" "info break in watchpoint.exp" ] {
- return 0;
+ return 0
}
+ gdb_test "watch ival3" ".*\[Ww\]atchpoint 3: ival3.*" "set watchpoint on ival3"
- # ??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
- }
- }
-
- # "info watch" is the same as "info break"
-
- if [gdb_test "info watch" "1\[ \]*breakpoint.*marker1.*\r\n2\[ \]*breakpoint.*marker2.*\r\n3\[ \]*.*watchpoint.*ival3" "watchpoint found in watchpoint/breakpoint table" ] {
- return 0;
+ if [gdb_test "info watch" "3\[ \]*.*watchpoint.*ival3" "watchpoint found in watchpoint/breakpoint table" ] {
+ return 0
}
# we get to the first marker function.
if [gdb_test "disable 3" "disable 3\[\r\n\]+" "disable watchpoint" ] {
- return 0;
+ return 0
}
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;
- }
+ 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 {
+ set test "run to marker1 in test_simple_watchpoint"
+ set retcode [gdb_test_multiple "" $test {
-re "Breakpoint 1, marker1 .*$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].
- #
- send_gdb "watch ival3\n"
- gdb_expect {
- -re ".*\[Ww\]atchpoint 3: ival3\r\n$gdb_prompt $" {
- pass "set watchpoint on ival3"
- }
- -re ".*$gdb_prompt $" { fail "set watchpoint on ival3" }
- timeout { fail "set watchpoint on ival3 (timeout)" }
- }
-
- set wp_set 1
-
- # "info watch" is the same as "info break"
-
- send_gdb "info watch\n"
- gdb_expect {
- -re "1\[ \]*breakpoint.*marker1.*\r\n2\[ \]*breakpoint.*marker2.*\r\n3\[ \]*.*watchpoint.*ival3\r\n$gdb_prompt $" {
- pass "watchpoint found in watchpoint/breakpoint table"
- }
- -re ".*$gdb_prompt $" {
- fail "watchpoint found in watchpoint/breakpoint table"
- }
- timeout {
- fail "watchpoint found in watchpoint/breakpoint table"
- }
+ pass $test
}
+ }]
- # 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.
-
- send_gdb "disable 3\n"
- gdb_expect {
- -re "disable 3\[\r\n\]+$gdb_prompt $" { pass "disable watchpoint" }
- -re ".*$gdb_prompt $" { fail "disable watchpoint" }
- timeout { fail "disable watchpoint (timeout)" }
- }
+ if { $retcode != 0 } {
+ return
}
# After reaching the marker function, enable the watchpoint.
if [gdb_test "enable 3" "^enable 3\[\r\n\]+" "enable watchpoint" ] {
- return ;
+ return
}
gdb_test "break func1" "Breakpoint.*at.*"
- gdb_test "set \$func1_breakpoint_number = \$bpnum" ""
+ 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 {
+ set test "watchpoint hit, first time"
+ gdb_test_multiple "cont" $test {
-re "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = -1.*New value = 0.*ival3 = count; ival4 = count;.*$gdb_prompt $" {
- pass "watchpoint hit, first time"
+ pass $test
}
-re "Continuing.*Breakpoint.*func1.*$gdb_prompt $" {
setup_xfail "m68*-*-*" 2597
fail "thought it hit breakpoint at func1 twice"
- gdb_test "delete \$func1_breakpoint_number" ""
+ 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"
+ $test
}
- -re ".*$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 "delete \$func1_breakpoint_number" ""
+ 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"
# Disable the watchpoint so we run at full speed until we exit.
if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "watchpoint disabled" ] {
- return ;
+ return
}
global decimal
global hex
- # "info watch" is the same as "info break"
- gdb_test "info watch" "\[0-9\]+\[ \]*breakpoint.*marker1.*\r\n\[0-9\]+\[ \]*breakpoint.*marker2.*\r\n\[0-9]+\[ \]*.*watchpoint.*ival3\r\n\.*\[0-9\]+ times.*" "watchpoints found in watchpoint/breakpoint table"
+ gdb_test "info watch" "\[0-9]+\[ \]*.*watchpoint.*ival3.*" "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;
+ return 0
}
gdb_run_cmd
set timeout 600
- gdb_expect {
+ set test "run to marker1 in test_disabling_watchpoints"
+ set retcode [gdb_test_multiple "" $test {
-re "Breakpoint 1, marker1 .*$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
+ pass $test
}
+ }]
+
+ if { $retcode != 0 } {
+ return
}
# After reaching the marker function, enable the watchpoint.
if [gdb_test "enable 3" "^enable 3\[\r\n\]+" "watchpoint enabled" ] {
- return ;
+ return
}
# Disable the watchpoint but leave breakpoints
if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint #2 in test_disabling_watchpoints" ] {
- return 0;
+ return 0
}
gdb_test "break func2 if 0" "Breakpoint.*at.*"
gdb_test "p \$func2_breakpoint_number = \$bpnum" " = .*"
- # The problem is that GDB confuses stepping through the call
- # dummy with hitting the breakpoint at the end of the call dummy.
- # Will be fixed once all architectures define
- # DEPRECATED_CALL_DUMMY_BREAKPOINT_OFFSET.
- setup_xfail "*-*-*"
- # This doesn't occur if the call dummy starts with a call,
- # because we are out of the dummy by the first time the inferior
- # stops.
- clear_xfail "arm*-*-*"
- clear_xfail "xscale*-*-*"
- clear_xfail "d10v*-*-*"
- clear_xfail "m68*-*-*"
- clear_xfail "i*86*-*-*"
- clear_xfail "vax-*-*"
- # The following architectures define DEPRECATED_CALL_DUMMY_BREAKPOINT_OFFSET.
- clear_xfail "alpha-*-*"
- clear_xfail "mips*-*-*"
- clear_xfail "sparc-*-*"
- clear_xfail "hppa*-*-*bsd*"
- # It works with the generic inferior function calling code too.
- # OBSOLETE clear_xfail "mn10200*-*-*"
- clear_xfail "mn10300*-*-*"
- # The following architectures define CALL_DUMMY_HAS_COMPLETED.
- clear_xfail "hppa*-*-*hpux*"
gdb_test "p func1 ()" "= 73" \
- "calling function with watchpoint enabled"
+ "calling function with watchpoint enabled"
#
# "finish" brings us back to main.
gdb_test "until" "ival1 = count.*" "until to ival1 assignment"
gdb_test "until" "ival3 = count.*" "until to ival3 assignment"
- send_gdb "until\n"
- gdb_expect {
+ set test "until out of loop"
+ gdb_test_multiple "until" $test {
-re "(for \\(count = 0|\}).*$gdb_prompt $" {
- gdb_test "until" "ival1 = count; /. Outside loop ./" \
- "until out of loop"
+ gdb_test "until" "ival1 = count; /. Outside loop ./" $test
}
-re "ival1 = count; /. Outside loop ./.*$gdb_prompt $" {
- pass "until out of loop"
+ pass $test
}
- -re ".*$gdb_prompt $" {
- fail "until out of loop"
- }
- default { fail "until out of loop (timeout)" ; return }
}
gdb_test "step" "ival2 = count.*" "step to ival2 assignment"
# These tests won't work without printf support.
if [gdb_skip_stdio_test "watchpoints triggered in syscall"] {
- return;
+ return
}
# Run until we get to the first marker function.
set x 0
set y 0
- set testname "Watch buffer passed to read syscall"
+ 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\[4\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[4\\\]"
gdb_test "break marker4" ".*Breakpoint.*"
- gdb_test "set doread = 1" ""
+ gdb_test_no_output "set doread = 1"
- # If we send_gdb "123\n" before gdb has switched the tty, then it goes
+ # 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";
+
+ send_gdb "continue\n"
gdb_expect {
-re "Continuing\\.\r\ntype stuff for buf now:" {
pass "continue to read"
}
default {
- fail "continue to read";
- return ;
+ fail "continue to read"
+ return
}
}
- send_gdb "123\n"
- gdb_expect {
+ set test "sent 123"
+ gdb_test_multiple "123" $test {
-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 $" { pass "sent 123" }
- timeout { fail "sent 123 (timeout)" }
+ -re ".*$gdb_prompt $" { pass $test }
}
# 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\[0\]"}
+ set test "print buf\[0\]"
+ gdb_test_multiple $test $test {
+ -re ".*= 49.*$gdb_prompt $" { set y [expr $y+1]; pass $test }
+ -re ".*= 0.*$gdb_prompt $" { $test }
}
- 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\[1\]"}
+ set test "print buf\[1\]"
+ gdb_test_multiple $test $test {
+ -re ".*= 50.*$gdb_prompt $" { set y [expr $y+1]; pass $test }
+ -re ".*= 0.*$gdb_prompt $" { pass $test }
}
- 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\[2\]"}
+ set test "print buf\[2\]"
+ gdb_test_multiple $test $test {
+ -re ".*= 51.*$gdb_prompt $" { set y [expr $y+1]; pass $test }
+ -re ".*= 0.*$gdb_prompt $" { pass $test }
}
- 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\[3\]" }
+ set test "print buf\[3\]"
+ gdb_test_multiple $test $test {
+ -re ".*= 10.*$gdb_prompt $" { set y [expr $y+1]; pass $test }
+ -re ".*= 0.*$gdb_prompt $" { pass $test }
}
# Did we find what we were looking for? If not, flunk it.
"continue to marker4"
# Disable everything so we can finish the program at full speed
- gdb_test "disable" "" "disable in test_watchpoint_triggered_in_syscall"
+ gdb_test_no_output "disable" "disable in test_watchpoint_triggered_in_syscall"
if [target_info exists gdb,noresults] { return }
# In particular, test that a watch of stack-based things
# is deleted when the stack-based things go out of scope.
#
- gdb_test "disable" "" "disable in test_complex_watchpoint"
+ 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.*"
+ gdb_breakpoint [gdb_get_line_number "func2 breakpoint here"]
+ gdb_continue_to_breakpoint "func2 breakpoint here"
# Test a watch of a single stack-based variable, whose scope
# is the function we're now in. This should auto-delete when
#
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.*"
+ set test "self-delete local watch"
+ gdb_test_multiple "cont" $test {
+ -re "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*\r\n$gdb_prompt $" {
+ pass $test
+ }
+ -re "can't compute CFA for this frame.*\r\n$gdb_prompt $" {
+ global no_hw
+
+ # GCC < 4.5.0 does not get LOCATIONS_VALID set by dwarf2read.c.
+ # Therefore epilogue unwinder gets applied which is
+ # incompatible with dwarf2_frame_cfa.
+ if {$no_hw && ([test_compiler_info {gcc-[0-3]-*}]
+ || [test_compiler_info {gcc-4-[0-4]-*}])} {
+ xfail "$test (old GCC has broken watchpoints in epilogues)"
+ return
+ }
+ fail $test
+ }
+ }
+
+ gdb_continue_to_breakpoint "func2 breakpoint here"
# 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
# across any invocations of "func2", it should not auto-
# delete.
#
- gdb_test "cont" "Continuing.*func2.*"
+ gdb_continue_to_breakpoint "func2 breakpoint here"
gdb_test "watch static_b" ".*\[Ww\]atchpoint \[0-9\]*: static_b" \
"set static local watch"
gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: static_b.*" \
# 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 "tbreak recurser" ".*breakpoint.*"
gdb_test "cont" "Continuing.*recurser.*"
+ gdb_test "next" "if \\(x > 0.*" "next past local_x initialization"
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.*" \
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"
+ # Repeat the preceding test, but this time use "recurser::local_x" as
+ # the variable to track.
+ gdb_test "cont" "Continuing.*marker6.*"
+ gdb_test "tbreak recurser" ".*breakpoint.*"
+ gdb_test "cont" "Continuing.*recurser.*"
+ gdb_test "next" "if \\(x > 0.*" "next past local_x initialization"
+ gdb_test "watch recurser::local_x" ".*\[Ww\]atchpoint \[0-9\]*: recurser::local_x" \
+ "set local watch in recursive call with explicit scope"
+ gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: recurser::local_x.*New value = 2.*" \
+ "trigger local watch with explicit scope 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 with explicit scope in recursive call (2)"
+
# Disable everything so we can finish the program at full speed
- gdb_test "disable" "" "disable in test_complex_watchpoint"
+ gdb_test_no_output "disable" "disable in test_complex_watchpoint"
if [target_info exists gdb,noresults] { return }
proc test_watchpoint_and_breakpoint {} {
global gdb_prompt
- # This is a test for PR gdb/38, which involves setting a
+ # This is a test for PR breakpoints/7143, 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"
+ gdb_test "next" \
+ ".*atchpoint \[0-9\]+: x\r\n\r\nOld value = 0\r\nNew value = 1\r\n.*" \
+ "next after watch x"
+
+ gdb_test_no_output "delete \$bpnum" "delete watch x"
+ }
+}
+
+proc test_constant_watchpoint {} {
+ gdb_test "watch 5" "Cannot watch constant value `5'." "number is constant"
+ gdb_test "watch (int *)5" "Cannot watch constant value `\\(int \\*\\)5'." \
+ "number with cast 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_disable_enable_software_watchpoint {} {
+ # This is regression test for a bug that caused `enable' to fail
+ # for software watchpoints.
+
+ # Watch something not memory to force a software watchpoint.
+ gdb_test {watch $pc} ".*atchpoint \[0-9\]+: .pc"
+
+ gdb_test_no_output "disable \$bpnum" "disable watchpoint `\$pc'"
+ gdb_test_no_output "enable \$bpnum" "reenable watchpoint `\$pc'"
+
+ gdb_test "info watchpoint \$bpnum" \
+ ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+.pc.*" \
+ "watchpoint `\$pc' is enabled"
+
+ gdb_test_no_output "delete \$bpnum" "delete watchpoint `\$pc'"
+}
+
+proc test_watch_location {} {
+ global gdb_prompt
+
+ gdb_breakpoint [gdb_get_line_number "func5 breakpoint here"]
+ gdb_continue_to_breakpoint "func5 breakpoint here"
+
+ # Check first if a null pointer can be dereferenced on the target.
+ gdb_test_multiple "p *nullptr" "" {
+ -re "Cannot access memory at address 0x0.*$gdb_prompt $" {
+ gdb_test "watch -location nullptr->p->x" \
+ "Cannot access memory at address 0x0"
+ }
+ -re ".*$gdb_prompt $" {
+ # Null pointer dereference is legitimate.
+ }
+ }
+
+ gdb_test "watch -location *x" "atchpoint .*: .*" "watch -location .x"
+
+ gdb_test "continue" \
+ "Continuing.*\[Ww\]atchpoint .*: .*New value = 27.*" \
+ "continue with watch -location"
+
+ gdb_test_no_output "delete \$bpnum" "delete watch -location"
+}
+
+# Tests watching areas larger than a word.
+
+proc test_wide_location_1 {} {
+ global no_hw
+ global gdb_prompt
+
+ # This test watches two words on most 32-bit ABIs, and one word on
+ # most 64-bit ABIs.
+
+ # Platforms where the target can't watch such a large region
+ # should clear hw_expected below.
+ if { $no_hw || [target_info exists gdb,no_hardware_watchpoints]
+ || [istarget arm*-*-*]
+ || ([istarget powerpc*-*-*] && ![is_lp64_target])} {
+ set hw_expected 0
+ } else {
+ set hw_expected 1
+ }
+
+ gdb_breakpoint [gdb_get_line_number "func6 breakpoint here"]
+ gdb_continue_to_breakpoint "func6 breakpoint here"
+
+ if { $hw_expected } {
+ gdb_test "watch foo2" "Hardware watchpoint .*: .*" "watch foo2"
+ gdb_test "continue" \
+ "Continuing.*Hardware watchpoint .*: .*New value = \\\{val = \\\{0, 11\\\}\\\}.*" \
+ "continue with watch foo2"
+ } else {
+ gdb_test "watch foo2" "atchpoint .*: .*" "watch foo2"
+ set test "continue with watch foo2"
+ gdb_test_multiple "cont" $test {
+ -re "Continuing.*\[Ww\]atchpoint .*: .*New value = \\\{val = \\\{0, 11\\\}\\\}.*$gdb_prompt $" {
+ pass $test
}
- -re "\[0-9\]+\[\t \]+y = 1;\r\n$gdb_prompt $" {
- kfail "gdb/38" "next after watch x"
+ -re "Could not insert hardware breakpoints:.*You may have requested too many hardware breakpoints/watchpoints.*$gdb_prompt $" {
+ # This may happen with remote targets that support
+ # hardware watchpoints. We only find out the
+ # watchpoint was too large, for example, at insert
+ # time. If GDB is ever adjusted to downgrade the
+ # watchpoint automatically in this case, this match
+ # should be removed.
+ pass $test
}
}
}
+
+ gdb_test_no_output "delete \$bpnum" "delete watch foo2"
}
-
+
+proc test_wide_location_2 {} {
+ global no_hw
+ global gdb_prompt
+
+ # This test watches four words on most 32-bit ABIs, and two words
+ # on 64-bit ABIs.
+
+ # Platforms where the target can't watch such a large region
+ # should clear hw_expected below.
+ if { $no_hw || [target_info exists gdb,no_hardware_watchpoints]
+ || [istarget arm*-*-*]
+ || [istarget powerpc*-*-*]} {
+ set hw_expected 0
+ } else {
+ set hw_expected 1
+ }
+
+ gdb_breakpoint [gdb_get_line_number "func7 breakpoint here"]
+ gdb_continue_to_breakpoint "func7 breakpoint here"
+
+ if { $hw_expected } {
+ gdb_test "watch foo4" "Hardware watchpoint .*: .*" "watch foo4"
+ gdb_test "continue" \
+ "Continuing.*Hardware watchpoint .*: .*New value = \\\{val = \\\{0, 0, 0, 33\\\}\\\}.*" \
+ "continue with watch foo4"
+ } else {
+ gdb_test "watch foo4" "atchpoint .*: .*" "watch foo4"
+ set test "continue with watch foo4"
+ gdb_test_multiple "cont" $test {
+ -re "Continuing.*\[Ww\]atchpoint .*: .*New value = \\\{val = \\\{0, 0, 0, 33\\\}\\\}.*$gdb_prompt $" {
+ pass $test
+ }
+ -re "Could not insert hardware breakpoints:.*You may have requested too many hardware breakpoints/watchpoints.*$gdb_prompt $" {
+ # This may happen with remote targets that support
+ # hardware watchpoints. We only find out the
+ # watchpoint was too large, for example, at insert
+ # time. If GDB is ever adjusted to downgrade the
+ # watchpoint automatically in this case, this match
+ # should be removed.
+ pass $test
+ }
+ }
+ }
+
+ gdb_test_no_output "delete \$bpnum" "delete watch foo4"
+}
+
+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
+ }
+ }
+
+ # See whether a watchpoint on a normal variable is a hardware
+ # watchpoint or not. The watchpoints on NULL should be hardware
+ # iff this one is.
+ set watchpoint_msg "Watchpoint"
+ gdb_test_multiple "watch global_ptr" "watch global_ptr" {
+ -re "Watchpoint \[0-9\]+: global_ptr\r\n.*$gdb_prompt $" {
+ pass "watch global_ptr"
+ }
+ -re "Hardware watchpoint \[0-9\]+: global_ptr\r\n.*$gdb_prompt $" {
+ set watchpoint_msg "Hardware watchpoint"
+ pass "watch global_ptr"
+ }
+ }
+ delete_breakpoints
+
+ # Make sure that we can watch a constant address, and correctly
+ # use a HW watchpoint if supported.
+ gdb_test "watch *(int *) 0" \
+ "$watchpoint_msg \[0-9\]+: \\*\\(int \\*\\) 0"
+ delete_breakpoints
+
+ # The same, but using -location through an indirection.
+ gdb_test "watch -location *global_ptr" \
+ "$watchpoint_msg \[0-9\]+: \-location \\*global_ptr"
+ delete_breakpoints
+
+ # This step requires two HW watchpoints. Since some platforms only
+ # have a single one, accept either SW or HW watchpoint in this case.
+ if {[skip_hw_watchpoint_multi_tests]} {
+ set watchpoint_msg "(Watchpoint|Hardware watchpoint)"
+ }
+
+ gdb_test "watch *global_ptr" "$watchpoint_msg \[0-9\]+: \\\*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 <unknown> 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.*" "global_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_no_hw_watchpoints {} {
+ global testfile
+
+ clean_restart $testfile
+
+ # 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" }
+
+ gdb_test_no_output "set can-use-hw-watchpoints 0" "disable fast watches"
+
+ gdb_test "show can-use-hw-watchpoints" \
+ "Debugger's willingness to use watchpoint hardware is 0." \
+ "show disable fast watches"
+
+ gdb_test "watch ival3 if count > 1" \
+ "Watchpoint \[0-9\]*: ival3.*" \
+ "set slow conditional watch"
+
+ gdb_test "continue" \
+ "Watchpoint \[0-9\]*: ival3.*Old value = 1.*New value = 2.*" \
+ "trigger slow conditional watch"
+
+ gdb_test_no_output "delete \$bpnum" "delete watch ival3"
+
+ gdb_test "watch ival3 if count > 1 thread 1 " \
+ "Watchpoint \[0-9\]*: ival3.*" \
+ "set slow condition watch w/thread"
+
+ gdb_test_no_output "delete \$bpnum" "delete watch w/condition and thread"
+
+ # We've explicitly disabled hardware watches. Verify that GDB
+ # refrains from using them.
+ #
+ gdb_test "rwatch ival3" \
+ "Can't set read/access watchpoint when hardware watchpoints are disabled." \
+ "rwatch disallowed when can-set-hw-watchpoints cleared"
+ gdb_test "awatch ival3" \
+ "Can't set read/access watchpoint when hardware watchpoints are disabled." \
+ "awatch disallowed when can-set-hw-watchpoints cleared"
+
+
+ # Re-enable hardware watchpoints if necessary.
+ if ![target_info exists gdb,no_hardware_watchpoints] {
+ gdb_test_no_output "set can-use-hw-watchpoints 1" ""
+ }
+}
+
+proc test_watchpoint_in_big_blob {} {
+ global gdb_prompt
+
+ # On native targets where we do hardware resource accounting, this
+ # may end up as a software watchpoint.
+ set ok 0
+ set test "watch buf"
+ gdb_test_multiple "watch buf" $test {
+ -re "Hardware watchpoint \[0-9\]+: buf.*You may have requested too many hardware breakpoints/watchpoints.*$gdb_prompt $" {
+ # This may happen with remote targets (where we don't do
+ # resource accounting) that support hardware watchpoints,
+ # when breakpoint always-inserted is on. The watchpoint
+ # was too large, for example. If GDB is ever adjusted to
+ # downgrade the watchpoint automatically in this case,
+ # this match should be removed. Note the breakpoint has
+ # been created, and is in the list, so it needs deleting.
+ pass $test
+ }
+ -re ".*atchpoint \[0-9\]+: buf.*$gdb_prompt $" {
+ pass $test
+ set ok 1
+ }
+ }
+
+ if { $ok } {
+ set test "watchpoint on buf hit"
+ gdb_test_multiple "cont" $test {
+ -re "Continuing.*atchpoint \[0-9\]+: buf\r\n\r\nOld value = .*testte\".*$gdb_prompt $" {
+ pass $test
+ }
+ -re "Could not insert hardware breakpoints:.*You may have requested too many hardware breakpoints/watchpoints.*$gdb_prompt $" {
+ # This may happen with remote targets that support
+ # hardware watchpoints. We only find out the
+ # watchpoint was too large, for example, at insert
+ # time. If GDB is ever adjusted to downgrade the
+ # watchpoint automatically in this case, this match
+ # should be removed.
+ pass $test
+ }
+ }
+ }
+
+ gdb_test_no_output "delete \$bpnum" "delete watch buf"
+}
+
+proc test_watch_register_location {} {
+ global no_hw
+
+ if {!$no_hw && ![target_info exists gdb,no_hardware_watchpoints]} {
+ # Non-memory read/access watchpoints are not supported, they would
+ # require software read/access watchpoint support (which is not
+ # currently available).
+ gdb_test "rwatch \$pc" \
+ "Expression cannot be implemented with read/access watchpoint..*" \
+ "rwatch disallowed for register based expression"
+ gdb_test "awatch \$pc" \
+ "Expression cannot be implemented with read/access watchpoint..*" \
+ "awatch disallowed for register based expression"
+ }
+}
+
# 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_no_hw_watchpoints
+
+proc do_tests {} {
+ global testfile
+ global no_hw
- test_simple_watchpoint
+ clean_restart $testfile
- # 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 $binfile
- initialize
+ if {$no_hw || [target_info exists gdb,no_hardware_watchpoints]} {
+ gdb_test_no_output "set can-use-hw-watchpoints 0" ""
}
- test_disabling_watchpoints
+ if [initialize] then {
- # See above.
- if [istarget "mips-idt-*"] then {
- gdb_exit
- gdb_start
- gdb_reinitialize_dir $srcdir/$subdir
- gdb_load $binfile
- initialize
- }
+ test_simple_watchpoint
- if ![target_info exists gdb,cannot_call_functions] {
- test_stepping
+ 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
}
}
+ # Tests below don't rely on the markers and watchpoint set by
+ # `initialize' anymore.
+ clean_restart $testfile
+
+ if {$no_hw || [target_info exists gdb,no_hardware_watchpoints]} {
+ gdb_test_no_output "set can-use-hw-watchpoints 0" ""
+ }
+
# 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
test_watchpoint_triggered_in_syscall
}
- # See above.
- if [istarget "mips-idt-*"] then {
- gdb_exit
- gdb_start
- gdb_reinitialize_dir $srcdir/$subdir
- gdb_load $binfile
- initialize
- }
+ test_complex_watchpoint
- # Only enabled for some targets merely because it has not been tested
- # elsewhere.
- if {[istarget "hppa*-*-*"] || \
- [istarget "sparc*-*-sunos*"] || \
- [istarget "m32r-*-*"]} then {
- test_complex_watchpoint
- }
+ test_inaccessible_watchpoint
- # Verify that a user can force GDB to use "slow" watchpoints.
- # (This proves rather little on kernels that don't support
- # fast watchpoints, but still...)
- #
- if ![runto_main] then { fail "watch tests suppressed" }
+ test_watchpoint_and_breakpoint
- send_gdb "set can-use-hw-watchpoints 0\n"
- gdb_expect {
- -re "$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 $"\
- {fail "trigger slow conditional watch"}
- timeout {fail "(timeout) trigger slow conditional watch"}
- }
+ test_watchpoint_in_big_blob
- # We've explicitly disabled hardware watches. Verify that GDB
- #
- #
- send_gdb "rwatch ival3\n"
- gdb_expect {
- -re "Expression cannot be implemented with read/access watchpoint..*$gdb_prompt $"\
- {pass "rwatch disallowed when can-set-hw-watchpoints cleared"}
- -re "$gdb_prompt $"\
- {fail "rwatch disallowed when can-set-hw-watchpoints cleared"}
- timeout {fail "(timeout) rwatch disallowed when can-use-hw-watchpoints cleared"}
- }
+ test_constant_watchpoint
- # Read- and access watchpoints are unsupported on HP-UX. Verify
- # that GDB gracefully responds to requests to create them.
- #
- if [istarget "hppa*-*-hpux*"] then {
- send_gdb "set can-use-hw-watchpoints 1\n"
- gdb_expect {
- -re "$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"}
- }
- }
-
- # See above.
- if [istarget "mips-idt-*"] then {
- gdb_exit
- gdb_start
- gdb_reinitialize_dir $srcdir/$subdir
- gdb_load $binfile
- initialize
- }
+ test_disable_enable_software_watchpoint
- test_watchpoint_and_breakpoint
+ test_watch_location
+
+ test_wide_location_1
+ test_wide_location_2
+
+ test_watch_register_location
+}
+
+# On targets that can do hardware watchpoints, run the tests twice:
+# once with hardware watchpoints enabled; another with hardware
+# watchpoints force-disabled.
+
+do_tests
+if ![target_info exists gdb,no_hardware_watchpoints] {
+ with_test_prefix "no-hw" {
+ set no_hw 1
+ do_tests
+ }
}
# Restore old timeout
projects / deliverable / binutils-gdb.git / blobdiff