gdb/testsuite/gdb.base/watch_thread_num.exp

   1 # This testcase is part of GDB, the GNU debugger.
   2
   3 # Copyright 2007-2020 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 # More specifically, the implementation of this test uses access
  25 # watchpoints, so skip it when those are not available.
  26 if {[skip_hw_watchpoint_access_tests]} {
  27     return 0
  28 }
  29
  30 standard_testfile .c
  31
  32 # What compiler are we using?
  33 #
  34 if [get_compiler_info] {
  35     return -1
  36 }
  37
  38 if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
  39     return -1
  40 }
  41
  42 clean_restart ${binfile}
  43
  44 if { ![runto main] } then {
  45    fail "run to main"
  46    return
  47 }
  48
  49 gdb_test "watch shared_var thread 0" "Invalid thread ID: 0" "watchpoint on invalid thread"
  50 gdb_test "watch shared_var thread" "A syntax error in expression, near `thread'\." "invalid watch syntax"
  51
  52 set bpexitline [gdb_get_line_number "all threads started"]
  53 gdb_breakpoint "$bpexitline"
  54 gdb_continue_to_breakpoint "all threads started"
  55
  56 gdb_test "break loop" "Breakpoint \[0-9\].*" \
  57   "Set breakpoint at loop"
  58
  59 gdb_test "continue" ".*Breakpoint .*loop.*" "stopped in loop"
  60
  61 gdb_test_multiple "thread" "thread command" {
  62     -re ".*Current thread is (\[0-9\]*).*$gdb_prompt $" {
  63         pass "thread command"
  64     }
  65 }
  66
  67 set thread_num "$expect_out(1,string)"
  68
  69 delete_breakpoints
  70
  71 # We use an access watchpoint rather than a write watchpoint, because
  72 # GDB can drop the latter when multiple threads trigger events
  73 # simultaneously, on targets with continuable watchpoints, such as
  74 # x86.  See PR breakpoints/10116.
  75
  76 gdb_test "awatch shared_var thread $thread_num" \
  77     "Hardware access \\(read/write\\) watchpoint .*: shared_var.*" \
  78     "watchpoint on shared variable"
  79
  80 gdb_test "info breakpoint \$bpnum" \
  81     "stop only in thread $thread_num" \
  82     "info breakpoint shows watchpoint is thread-specific"
  83
  84 for {set i 1} {$i <= 5} {incr i} {
  85     set watchpoint "Watchpoint triggered iteration $i"
  86     set check "Check thread that triggered iteration $i"
  87
  88     set test $watchpoint
  89     gdb_test_multiple "continue" $test {
  90         -re "infrun:" {
  91             # Avoid timeouts when debugging GDB.
  92             exp_continue
  93         }
  94         -re "Hardware access \\(read/write\\) watchpoint .*: shared_var.*$gdb_prompt $" {
  95             pass $test
  96         }
  97     }
  98     gdb_test "thread" ".*Current thread is $thread_num .*" $check
  99 }
 100