gdb/testsuite/gdb.base/watch_thread_num.exp

   1 # This testcase is part of GDB, the GNU debugger.
   2
   3 # Copyright 2007-2015 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 # watch-thread_num.exp   Test thread <thread_num> parameter for
  19 #                        watch commands.
  20 #
  21
  22 # This test verifies that a watchpoint is detected in the proper thread
  23 # so the test is only meaningful on a system with hardware watchpoints.
  24 if {[skip_hw_watchpoint_tests]} {
  25     return 0
  26 }
  27
  28 standard_testfile .c
  29
  30 # What compiler are we using?
  31 #
  32 if [get_compiler_info] {
  33     return -1
  34 }
  35
  36 if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
  37     return -1
  38 }
  39
  40 clean_restart ${binfile}
  41
  42 if { ![runto main] } then {
  43    fail "run to main"
  44    return
  45 }
  46
  47 gdb_test "watch shared_var thread 0" "Unknown thread 0\." "Watchpoint on invalid thread"
  48 gdb_test "watch shared_var thread" "A syntax error in expression, near `thread'\." "Invalid watch syntax"
  49
  50 set bpexitline [gdb_get_line_number "all threads started"]
  51 gdb_breakpoint "$bpexitline"
  52 gdb_continue_to_breakpoint "all threads started"
  53
  54 gdb_test "break loop" "Breakpoint \[0-9\].*" \
  55   "Set breakpoint at loop"
  56
  57 gdb_test "continue" ".*Breakpoint .*loop.*" "Stopped in loop"
  58
  59 gdb_test_multiple "thread" "Thread command" {
  60     -re ".*Current thread is (\[0-9\]*).*$gdb_prompt $" {
  61         pass "Thread command"
  62     }
  63 }
  64
  65 set thread_num "$expect_out(1,string)"
  66
  67 delete_breakpoints
  68
  69 # We use an access watchpoint rather than a write watchpoint, because
  70 # GDB can drop the latter when multiple threads trigger events
  71 # simultaneously, on targets with continuable watchpoints, such as
  72 # x86.  See PR breakpoints/10116.
  73
  74 gdb_test "awatch shared_var thread $thread_num" \
  75     "Hardware access \\(read/write\\) watchpoint .*: shared_var.*" \
  76     "Watchpoint on shared variable"
  77
  78 gdb_test "info breakpoint \$bpnum" \
  79     "stop only in thread $thread_num" \
  80     "info breakpoint shows watchpoint is thread-specific"
  81
  82 for {set i 1} {$i <= 5} {incr i} {
  83     set watchpoint "Watchpoint triggered iteration $i"
  84     set check "Check thread that triggered iteration $i"
  85
  86     set test $watchpoint
  87     gdb_test_multiple "continue" $test {
  88         -re "infrun:" {
  89             # Avoid timeouts when debugging GDB.
  90             exp_continue
  91         }
  92         -re "Hardware access \\(read/write\\) watchpoint .*: shared_var.*$gdb_prompt $" {
  93             pass $test
  94         }
  95     }
  96     gdb_test "thread" ".*Current thread is $thread_num .*" $check
  97 }
  98