| # Copyright 1992-2021 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 was written by Fred Fish. (fnf@cygnus.com) |
| |
| |
| standard_testfile |
| |
| if [get_compiler_info] { |
| return -1 |
| } |
| |
| if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } { |
| untested "failed to compile" |
| 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. |
| # |
| # 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 |
| |
| 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 |
| } |
| |
| gdb_test "watch ival3" ".*\[Ww\]atchpoint 3: ival3.*" "set watchpoint on ival3" |
| |
| 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 |
| |
| # Ensure that the watchpoint is disabled when we startup. |
| |
| 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 |
| set test "run to marker1 in test_simple_watchpoint" |
| set retcode [gdb_test_multiple "" $test { |
| -re "Breakpoint 1, marker1 .*$gdb_prompt $" { |
| pass $test |
| } |
| }] |
| |
| if { $retcode != 0 } { |
| return |
| } |
| |
| # 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 |
| |
| 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 $test |
| } |
| -re "Continuing.*Breakpoint.*func1.*$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;" \ |
| $test |
| } |
| } |
| |
| # 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 |
| |
| 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 |
| } |
| |
| |
| # Run until we get to the first marker function. |
| |
| gdb_run_cmd |
| set timeout 600 |
| set test "run to marker1 in test_disabling_watchpoints" |
| set retcode [gdb_test_multiple "" $test { |
| -re "Breakpoint 1, marker1 .*$gdb_prompt $" { |
| 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 |
| } |
| |
| |
| # 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" |
| set test "until out of loop" |
| gdb_test_multiple "until" $test { |
| -re "(for \\(count = 0|\}).*$gdb_prompt $" { |
| gdb_test "until" "ival1 = count; /. Outside loop ./" $test |
| } |
| -re "ival1 = count; /. Outside loop ./.*$gdb_prompt $" { |
| pass $test |
| } |
| } |
| |
| 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 |
| } |
| } |
| |
| 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 $test } |
| } |
| |
| # Examine the values in buf to see how many watchpoints we |
| # should have printed. |
| 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 } |
| } |
| 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 } |
| } |
| 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 } |
| } |
| 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. |
| 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, first time" |
| gdb_test "break marker6" ".*Breakpoint.*" |
| gdb_test "cont" "Continuing.*Breakpoint.*marker6 \\(\\).*" \ |
| "continue to marker6" |
| gdb_breakpoint [gdb_get_line_number "func2 breakpoint here"] |
| gdb_continue_to_breakpoint "func2 breakpoint here, first time" |
| |
| # 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" |
| |
| 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, second time" |
| # 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_continue_to_breakpoint "func2 breakpoint here, third time" |
| 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. |
| # |
| with_test_prefix "local_x" { |
| 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.*" \ |
| "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" |
| } |
| |
| # Repeat the preceding test, but this time use "recurser::local_x" as |
| # the variable to track. |
| with_test_prefix "recurser::local_x" { |
| gdb_test "cont" "Continuing.*marker6.*" "continue to marker6" |
| gdb_test "tbreak recurser" ".*breakpoint.*" |
| gdb_test "cont" "Continuing.*recurser.*" "continue to 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_no_output "disable" "disable in test_complex_watchpoint, second time" |
| |
| 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 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 "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 *null_ptr" "" { |
| -re "Cannot access memory at address 0x0.*$gdb_prompt $" { |
| gdb_test "watch -location null_ptr->p->x" \ |
| "Cannot access memory at address 0x0" |
| } |
| -re ".*$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 .*: .*" |
| gdb_test "continue" \ |
| "Continuing.*Hardware watchpoint .*: .*New value = \\\{val = \\\{0, 11\\\}\\\}.*" \ |
| "continue with watch foo2" |
| } else { |
| gdb_test "watch foo2" "atchpoint .*: .*" |
| set test "continue with watch foo2" |
| gdb_test_multiple "cont" $test { |
| -re "Continuing.*\[Ww\]atchpoint .*: .*New value = \\\{val = \\\{0, 11\\\}\\\}.*$gdb_prompt $" { |
| pass $test |
| } |
| -re "Could not insert hardware breakpoints:.*You may have requested too many hardware breakpoints/watchpoints.*$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 .*: .*" |
| gdb_test "continue" \ |
| "Continuing.*Hardware watchpoint .*: .*New value = \\\{val = \\\{0, 0, 0, 33\\\}\\\}.*" \ |
| "continue with watch foo4" |
| } else { |
| gdb_test "watch foo4" "atchpoint .*: .*" |
| 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 { |
| return |
| } |
| |
| 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. |
| |
| set prev_timeout $timeout |
| set timeout 600 |
| verbose "Timeout now 600 sec.\n" |
| |
| test_no_hw_watchpoints |
| |
| proc do_tests {} { |
| global testfile |
| global no_hw |
| |
| clean_restart $testfile |
| |
| if {$no_hw || [target_info exists gdb,no_hardware_watchpoints]} { |
| gdb_test_no_output "set can-use-hw-watchpoints 0" "" |
| } |
| |
| if [initialize] then { |
| |
| test_simple_watchpoint |
| |
| test_disabling_watchpoints |
| |
| 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 |
| # breakpoint before stopping for the watchpoint. I don't know why. |
| if {[istarget "hppa*-*-*"]} then { |
| test_watchpoint_triggered_in_syscall |
| } |
| |
| test_complex_watchpoint |
| |
| test_inaccessible_watchpoint |
| |
| test_watchpoint_and_breakpoint |
| |
| test_watchpoint_in_big_blob |
| |
| test_constant_watchpoint |
| |
| test_disable_enable_software_watchpoint |
| |
| 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 |
| set timeout $prev_timeout |
| verbose "Timeout now $timeout sec.\n" |
