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Diffstat (limited to 'gdb/testsuite/gdb.base/watchpoint.exp')
| -rw-r--r-- | gdb/testsuite/gdb.base/watchpoint.exp | 583 |
1 files changed, 583 insertions, 0 deletions
diff --git a/gdb/testsuite/gdb.base/watchpoint.exp b/gdb/testsuite/gdb.base/watchpoint.exp new file mode 100644 index 00000000000..a2954452cd1 --- /dev/null +++ b/gdb/testsuite/gdb.base/watchpoint.exp @@ -0,0 +1,583 @@ +# Copyright (C) 1992, 1994, 1997, 1998 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 +# (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 + +# 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} + + +if [get_compiler_info ${binfile}] { + return -1 +} + +# if we are on HPUX and we are not compiled with gcc, then skip these tests. + +if [istarget hppa*-*-hpux*] { + if {!$gcc_compiled} { + continue + } +} + + +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." +} + +# 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; + } + + + if [gdb_test "watch ival3" ".*\[Ww\]atchpoint 3: ival3" "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; + } + + + # 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 + 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 + } + } + + # 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 "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 "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 } + } + + gdb_test "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" + + # 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" + + # 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" + + # 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" + + # 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_test "cont" "Continuing.*Program exited normally.*" \ + "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 + + # 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" "3\[ \]*.*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_test "cont" "Continuing.*Program exited normally.*" \ + "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" " = .*" + + # The HPPA has a problem here if it's not using hardware watchpoints + if {[ istarget "hppa*-*-*" ] && ![ istarget "hppa*-*-*bsd*" ]} then { + # Don't actually try doing the call, if we do we can't continue. + setup_xfail "*-*-*" + fail "calling function with watchpoint enabled" + } else { + # 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 + # 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 "d10v*-*-*" + clear_xfail "m68*-*-*" + clear_xfail "i*86*-*-*" + clear_xfail "vax-*-*" + # The following architectures define 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. + clear_xfail "mn10200*-*-*" + clear_xfail "mn10300*-*-*" + 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" { } + default { fail "finish from marker1" ; return } + } + + gdb_expect { + -re "marker1 \\(\\);.*$gdb_prompt $" { + send_gdb "step\n" + exp_continue + } + -re "func1 \\(\\);.*$gdb_prompt $" { + pass "finish from marker1" + } + -re ".*$gdb_prompt $" { + fail "finish from marker1" + } + default { fail "finish from marker1" ; return } + } + + gdb_test "next" "for \\(count = 0.*" "next to `for' in watchpoint.exp" + + # Now test that "until" works. It's a bit tricky to test + # "until", because compilers don't always arrange the code + # exactly the same way, and we might get slightly different + # sequences of statements. But the following should be true + # (if not it is a compiler or a debugger bug): The user who + # does "until" at every statement of a loop should end up + # stepping through the loop once, and the debugger should not + # stop for any of the remaining iterations. + + gdb_test "until" "ival1 = count.*" "until to ival1 assignment" + gdb_test "until" "ival3 = count.*" "until to ival3 assignment" + send_gdb "until\n" + gdb_expect { + -re "(for \\(count = 0|\}).*$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" ; 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 + + if [target_info exists gdb,noinferiorio] { + verbose "Skipping test_watchpoint_triggered_in_syscall due to noinferiorio" + 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 "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 "disable" "" "disable in test_watchpoint_triggered_in_syscall" + + if [target_info exists gdb,noresults] { return } + + gdb_test "cont" "Continuing.*Program exited normally.*" \ + "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" + + # Disable everything so we can finish the program at full speed + gdb_test "disable" "" "disable in test_complex_watchpoint" + + if [target_info exists gdb,noresults] { return } + + + gdb_test "cont" "Continuing.*Program exited normally.*" \ + "continue to exit in test_complex_watchpoint" + } +} + +# Start with a fresh gdb. + +gdb_start +gdb_reinitialize_dir $srcdir/$subdir +gdb_load $binfile +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 + } +} |