gdb/testsuite/gdb.threads/watchthreads.exp

   1 # This testcase is part of GDB, the GNU debugger.
   2
   3 # Copyright 2004, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
   4
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 3 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 # Check that GDB can support multiple watchpoints across threads.
  19
  20 if $tracelevel {
  21     strace $tracelevel
  22 }
  23
  24
  25 # This test verifies that a watchpoint is detected in the proper thread
  26 # so the test is only meaningful on a system with hardware watchpoints.
  27 if [target_info exists gdb,no_hardware_watchpoints] {
  28     return 0;
  29 }
  30
  31 proc target_no_stopped_data { } {
  32     return [istarget s390*-*-*]
  33 }
  34
  35 set testfile "watchthreads"
  36 set srcfile ${testfile}.c
  37 set binfile ${objdir}/${subdir}/${testfile}
  38 if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug "incdir=${objdir}"]] != "" } {
  39     return -1
  40 }
  41
  42 gdb_exit
  43 gdb_start
  44 gdb_reinitialize_dir $srcdir/$subdir
  45 gdb_load ${binfile}
  46
  47 gdb_test "set can-use-hw-watchpoints 1" "" ""
  48
  49 #
  50 # Run to `main' where we begin our tests.
  51 #
  52
  53 if ![runto_main] then {
  54     gdb_suppress_tests
  55 }
  56
  57 set args_0 0
  58 set args_1 0
  59
  60 # Watch values that will be modified by distinct threads.
  61 gdb_test "watch args\[0\]" "Hardware watchpoint 2: args\\\[0\\\]"
  62 gdb_test "watch args\[1\]" "Hardware watchpoint 3: args\\\[1\\\]"
  63 set hwwp_2_enabled 1
  64 set hwwp_3_enabled 1
  65
  66 set init_line [gdb_get_line_number "Init value"]
  67 set inc_line [gdb_get_line_number "Loop increment"]
  68 set main_loc "main \\\(\\\) at .*watchthreads.c:$init_line"
  69 set thread0_loc "thread_function \\\(arg=0x0\\\) at .*watchthreads.c:$inc_line"
  70 set thread1_loc "thread_function \\\(arg=0x1\\\) at .*watchthreads.c:$inc_line"
  71
  72 # Loop and continue to allow both watchpoints to be triggered.
  73 for {set i 0} {$i < 30} {incr i} {
  74   set test_flag_0 0
  75   set test_flag_1 0
  76   set test_flag 0
  77   gdb_test_multiple "continue" "threaded watch loop" {
  78     -re "(.*Hardware watchpoint.*)$gdb_prompt $" {
  79         # At least one hardware watchpoint was hit.  Check if both were.
  80         set string $expect_out(1,string)
  81
  82         if [regexp "Hardware watchpoint 2: args\\\[0\\\]\[^\r\]*\r\[^\r\]*\r\[^\r\]*Old value = $args_0\[^\r\]*\r\[^\r\]*New value = [expr $args_0+1]\r" $string] {
  83             incr args_0
  84             incr test_flag_0
  85         }
  86         if [regexp "Hardware watchpoint 3: args\\\[1\\\]\[^\r\]*\r\[^\r\]*\r\[^\r\]*Old value = $args_1\[^\r\]*\r\[^\r\]*New value = [expr $args_1+1]\r" $string] {
  87             incr args_1
  88             incr test_flag_1
  89         }
  90
  91         set expected_loc "bogus location"
  92         if { $test_flag_0 == 1 && $test_flag_1 == 0 && $args_0 == 1 } {
  93             set expected_loc $main_loc
  94         } elseif { $test_flag_0 == 0 && $test_flag_1 == 1 && $args_1 == 1 } {
  95             set expected_loc $main_loc
  96         } elseif { $test_flag_0 == 1 && $test_flag_1 == 0 } {
  97             set expected_loc $thread0_loc
  98         } elseif { $test_flag_0 == 0 && $test_flag_1 == 1 } {
  99             set expected_loc $thread1_loc
 100         } elseif { $test_flag_0 + $test_flag_1 == 2 } {
 101             # On S/390, or any other system which can not report the
 102             # stopped data address, it is OK to report two watchpoints
 103             # at once in this test.  Make sure the reported location
 104             # corresponds to at least one of the watchpoints (and not,
 105             # e.g., __nptl_create_event).  On other systems, we should
 106             # report the two watchpoints serially.
 107             if { [target_no_stopped_data] } {
 108                 set expected_loc "($main_loc|$thread0_loc|$thread1_loc)"
 109             }
 110         }
 111
 112         if [ regexp "$expected_loc" $string ] {
 113             set test_flag 1
 114         } else {
 115             fail "threaded watch loop"
 116         }
 117
 118         # If one of the watchpoints is disabled, we'd better not stop there.
 119         if { !$hwwp_2_enabled && $test_flag_0 } {
 120             fail "disabled hw watchpoint 2 triggered"
 121         }
 122         if { !$hwwp_3_enabled && $test_flag_1 } {
 123             fail "disabled hw watchpoint 3 triggered"
 124         }
 125
 126         # If we get to 10 in one of the watched locations disable it so we
 127         # see some of the other watched location.
 128         # 10 is chosen so we're guaranteed to come through here.
 129         if { $hwwp_2_enabled && $hwwp_3_enabled } {
 130             if { $args_0 >= 10 && $hwwp_2_enabled } {
 131                 gdb_test_no_output "disable 2" "disable first watchpoint at 10"
 132                 set hwwp_2_enabled 0
 133             } elseif { $args_1 >= 10 && $hwwp_3_enabled } {
 134                 gdb_test_no_output "disable 3" "disable first watchpoint at 10"
 135                 set hwwp_3_enabled 0
 136             }
 137         }
 138     }
 139   }
 140
 141   # If we fail above, don't bother continuing loop
 142   if { $test_flag == 0 } {
 143     set i 30;
 144   }
 145 }
 146
 147 # Print success message if loop succeeded.
 148 if { $test_flag == 1 } {
 149   pass "threaded watch loop"
 150 }
 151
 152 # Verify that we hit first watchpoint in main thread.
 153 set message "first watchpoint on args\[0\] hit"
 154 if { $args_0 > 0 } {
 155   pass $message
 156 } else {
 157   fail $message
 158 }
 159
 160 # Verify that we hit second watchpoint in main thread.
 161 set message "first watchpoint on args\[1\] hit"
 162 if { $args_1 > 0 } {
 163   pass $message
 164 } else {
 165   fail $message
 166 }
 167
 168 # Verify that we hit first watchpoint in child thread.
 169 set message "watchpoint on args\[0\] hit in thread"
 170 if { $args_0 > 1 } {
 171   pass $message
 172 } else {
 173   fail $message
 174 }
 175
 176 # Verify that we hit second watchpoint in child thread.
 177 set message "watchpoint on args\[1\] hit in thread"
 178 if { $args_1 > 1 } {
 179   pass $message
 180 } else {
 181   fail $message
 182 }
 183
 184 # Verify that all watchpoint hits are accounted for.
 185 set message "combination of threaded watchpoints = 30"
 186 if { [target_no_stopped_data] } {
 187     # See above.  If we allow two watchpoints to be hit at once, we
 188     # may have more than 30 hits total.
 189     set result [expr $args_0 + $args_1 >= 30]
 190 } else {
 191     set result [expr $args_0 + $args_1 == 30]
 192 }
 193 if { $result } {
 194   pass $message
 195 } else {
 196   fail $message
 197 }