gdb/testsuite/gdb.threads/local-watch-wrong-thread.exp

   1 # This testcase is part of GDB, the GNU debugger.
   2
   3 # Copyright 2009-2013 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 # This test verifies that a local watchpoint isn't deleted when a
  19 # thread other than the thread the local watchpoint was set in stops
  20 # for a breakpoint.
  21
  22 if {[skip_hw_watchpoint_multi_tests]} {
  23     return 0
  24 }
  25
  26 standard_testfile
  27 if {[gdb_compile_pthreads \
  28          "${srcdir}/${subdir}/${srcfile}" \
  29          "${binfile}" executable {debug} ] != "" } {
  30     return -1
  31 }
  32
  33 clean_restart ${binfile}
  34
  35 gdb_test_no_output "set can-use-hw-watchpoints 1" ""
  36
  37 if ![runto_main] then {
  38     fail "Can't run to main"
  39     return
  40 }
  41
  42 set inc_line_1 [gdb_get_line_number "Loop increment 1"]
  43 set inc_line_2 [gdb_get_line_number "Loop increment 2"]
  44 set bkpt_here [gdb_get_line_number "set breakpoint here"]
  45
  46 # Run to the loop within thread_function0, so we can set our local
  47 # watchpoint.
  48 gdb_test "break ${srcfile}:${inc_line_1}" \
  49     "Breakpoint 2 at .*: file .*${srcfile}, line .*" \
  50     "breakpoint on thread_function0"
  51
  52 gdb_test "continue" \
  53     ".*Breakpoint 2.*thread_function0.*" \
  54     "continue to thread_function0"
  55
  56 delete_breakpoints
  57
  58 # Set the local watchpoint, and confirm that it traps as expected.
  59 gdb_test "watch *myp" \
  60     "Hardware watchpoint 3\: \\*myp.*" \
  61     "set local watchpoint on *myp"
  62
  63 gdb_test "continue" \
  64     "Hardware watchpoint.*Old value.*New value.*thread_function0.*" \
  65     "local watchpoint triggers"
  66
  67 delete_breakpoints
  68
  69 # Recreate the watchpoint, but this time with a condition we know
  70 # won't trigger.  This is so the watchpoint is inserted, and the
  71 # target reports events, but GDB doesn't stop for them.  We want to
  72 # hit the breakpoints on the other thread, and make sure this
  73 # watchpoint isn't deleted then.
  74 gdb_test "watch *myp if trigger != 0" \
  75     "Hardware watchpoint 4\: \\*myp.*" \
  76     "set local watchpoint on *myp, with false conditional"
  77
  78 # Run to a breakpoint on a different thread.  The previous local
  79 # watchpoint should not be deleted with the standard 'the program has
  80 # left the block in which its expression is valid', because the
  81 # thread_function0 thread should still be running in the loop.
  82 gdb_test "break ${srcfile}:${inc_line_2}" \
  83     "Breakpoint 5 at .*: file .*${srcfile}, line .*" \
  84     "breakpoint on the other thread"
  85
  86 gdb_test "continue" \
  87     "Breakpoint 5, thread_function1.*" \
  88     "the other thread stopped on breakpoint"
  89
  90 # Delete the new breakpoint, we don't need it anymore.
  91 gdb_test_no_output "delete 5" ""
  92
  93 # Check if the local watchpoint hasn't been deleted (is still listed).
  94 # This is simpler to check than expecting 'the program has left ...',
  95 # and, is immune to string changes in that warning.
  96 gdb_test "info breakpoints" \
  97     ".*4.*hw watchpoint.*keep.*y.*\\*myp.*" \
  98     "local watchpoint is still in breakpoint list"
  99
 100 # Make the watchpoint condition eval true.
 101 gdb_test_no_output "set trigger=1" "let local watchpoint trigger"
 102
 103 gdb_test "continue" \
 104     "Hardware watchpoint.*Old value.*New value.*thread_function0.*" \
 105     "local watchpoint still triggers"
 106
 107 # Confirm that the local watchpoint is indeed deleted when
 108 # thread_function0 returns.
 109 gdb_test_no_output "set *myp=0" "let thread_function0 return"
 110
 111 gdb_test "break ${srcfile}:${bkpt_here}" \
 112     "Breakpoint 6 at .*: file .*${srcfile}, line .*" \
 113     "breakpoint on thread_function0's caller"
 114
 115 gdb_test "continue" \
 116     ".*Watchpoint.*deleted.*" \
 117     "local watchpoint automatically deleted"