gdb/testsuite/gdb.threads/watchpoint-fork.exp

   1 # Copyright 2012 Free Software Foundation, Inc.
   2 #
   3 # This program is free software; you can redistribute it and/or modify
   4 # it under the terms of the GNU General Public License as published by
   5 # the Free Software Foundation; either version 3 of the License, or
   6 # (at your option) any later version.
   7 #
   8 # This program is distributed in the hope that it will be useful,
   9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 # GNU General Public License for more details.
  12 #
  13 # You should have received a copy of the GNU General Public License
  14 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15
  16 # Test case for forgotten hw-watchpoints after fork()-off of a process.
  17
  18 set testfile watchpoint-fork
  19
  20 if [is_remote target] {
  21     kfail "remote/13584" "gdbserver does not support debugging across fork"
  22     return
  23 }
  24
  25 proc test {type symbol} { with_test_prefix "$type" {
  26     global testfile objdir subdir srcdir gdb_prompt pf_prefix
  27
  28     set srcfile_type ${srcdir}/${subdir}/${testfile}-${type}.c
  29
  30     # no threads
  31
  32     set prefix_test $pf_prefix
  33     append pf_prefix " singlethreaded:"
  34
  35     set executable ${testfile}-${type}-st
  36     set srcfile_main ${srcdir}/${subdir}/${testfile}-st.c
  37     if { [gdb_compile "${srcfile_main} ${srcfile_type}" ${objdir}/${subdir}/${executable} executable [list debug additional_flags=-D$symbol]] != "" } {
  38         untested ${testfile}.exp
  39         set pf_prefix $prefix_test
  40         return
  41     }
  42     clean_restart $executable
  43
  44     if [target_info exists gdb,no_hardware_watchpoints] {
  45         # The software watchpoint functionality is in GDB an unrelated test.
  46         gdb_test_no_output "set can-use-hw-watchpoints 0"
  47     }
  48
  49     gdb_test "show detach-on-fork" "Whether gdb will detach the child of a fork is on\\."
  50     gdb_test_no_output "set follow-fork-mode $type"
  51     gdb_test "show follow-fork-mode" "Debugger response to a program call of fork or vfork is \"$type\"\\."
  52     # Testcase uses it for the `follow-fork-mode child' type.
  53     gdb_test "handle SIGUSR1 nostop noprint pass" "No\[ \t\]+No\[ \t\]+Yes.*"
  54
  55     if ![runto_main] {
  56         set pf_prefix $prefix_test
  57         return
  58     }
  59
  60     gdb_test "watch var" "atchpoint \[0-9\]+: var" "Set the watchpoint"
  61
  62     # It is never hit but it should not be left over in the fork()ed-off child.
  63     if [skip_hw_breakpoint_tests] {
  64         set hbreak "break"
  65     } else {
  66         set hbreak "hbreak"
  67     }
  68     gdb_test "$hbreak marker"
  69
  70     gdb_breakpoint "mark_exit"
  71
  72     gdb_test "continue" \
  73              "reakpoint \[0-9\]+, marker.*" "hardware breakpoints work"
  74     gdb_test "continue" \
  75              "atchpoint \[0-9\]+: var.*Old value = 0.*New value = 1.*forkoff *\\(1\\).*" "watchpoints work"
  76     gdb_test "continue" \
  77              "reakpoint \[0-9\]+, marker.*" "breakpoint after the first fork"
  78     gdb_test "continue" \
  79              "atchpoint \[0-9\]+: var.*Old value = 1.*New value = 2.*forkoff *\\(2\\).*" "watchpoint after the first fork"
  80     gdb_test "continue" \
  81              "reakpoint \[0-9\]+, marker.*" "breakpoint after the second fork"
  82     gdb_test "continue" \
  83              "atchpoint \[0-9\]+: var.*Old value = 2.*New value = 3.*mark_exit \\(\\);" "watchpoint after the second fork"
  84     gdb_test "continue" "Continuing\\..*\r\nBreakpoint \[0-9\]+, mark_exit .*" "finish"
  85
  86
  87     # threads
  88
  89     if [target_info exists gdb,no_hardware_watchpoints] {
  90         # Watchpoint hits would get detected in unexpected threads.
  91         set pf_prefix $prefix_test
  92         return
  93     }
  94
  95     set pf_prefix $prefix_test
  96     append pf_prefix " multithreaded:"
  97
  98     set executable ${testfile}-${type}-mt
  99     set srcfile_main ${srcdir}/${subdir}/${testfile}-mt.c
 100     if { [gdb_compile_pthreads "${srcfile_main} ${srcfile_type}" ${objdir}/${subdir}/${executable} executable [list debug "additional_flags=-D$symbol -DTHREAD"]] != "" } {
 101         untested ${testfile}.exp
 102         set pf_prefix $prefix_test
 103         return
 104     }
 105     clean_restart $executable
 106
 107     gdb_test_no_output "set follow-fork-mode $type"
 108     # Testcase uses it for the `follow-fork-mode child' type.
 109     gdb_test "handle SIGUSR1 nostop noprint pass" "No\[ \t\]+No\[ \t\]+Yes.*"
 110
 111     if ![runto_main] {
 112         set pf_prefix $prefix_test
 113         return
 114     }
 115
 116     gdb_test "watch var" "atchpoint \[0-9\]+: var" "Set the watchpoint"
 117
 118     # It should not be left over in the fork()ed-off child.
 119     gdb_test "$hbreak marker" {reakpoint [0-9]+.*}
 120
 121     gdb_breakpoint "mark_exit"
 122
 123     gdb_test "continue" \
 124              "reakpoint \[0-9\]+, marker.*" "hardware breakpoints work"
 125     gdb_test "continue" \
 126              "atchpoint \[0-9\]+: var.*Old value = 0.*New value = 1.*validity-first.*" "singlethread watchpoints work"
 127     gdb_test "continue" \
 128              "atchpoint \[0-9\]+: var.*Old value = 1.*New value = 2.*validity-thread-A.*" "multithreaded watchpoints work at A"
 129     gdb_test "continue" \
 130              "atchpoint \[0-9\]+: var.*Old value = 2.*New value = 3.*validity-thread-B.*" "multithreaded watchpoints work at B"
 131     gdb_test "continue" \
 132              "reakpoint \[0-9\]+, marker.*" "breakpoint (A) after the first fork"
 133     gdb_test "continue" \
 134              "atchpoint \[0-9\]+: var.*Old value = 3.*New value = 4.*after-fork1-A.*" "watchpoint A after the first fork"
 135     gdb_test "continue" \
 136              "atchpoint \[0-9\]+: var.*Old value = 4.*New value = 5.*after-fork1-B.*" "watchpoint B after the first fork"
 137     gdb_test "continue" \
 138              "reakpoint \[0-9\]+, marker.*" "breakpoint (A) after the second fork"
 139     gdb_test "continue" \
 140              "atchpoint \[0-9\]+: var.*Old value = 5.*New value = 6.*after-fork2-A.*" "watchpoint A after the second fork"
 141     gdb_test "continue" \
 142              "atchpoint \[0-9\]+: var.*Old value = 6.*New value = 7.*after-fork2-B.*" "watchpoint B after the second fork"
 143     gdb_test "continue" "Continuing\\..*\r\nBreakpoint \[0-9\]+, mark_exit .*" "finish"
 144
 145
 146     # cleanup
 147     set pf_prefix $prefix_test
 148 }}
 149
 150 test parent FOLLOW_PARENT
 151
 152 # Only GNU/Linux is known to support `set follow-fork-mode child'.
 153 if [istarget "*-*-linux*"] {
 154     test child FOLLOW_CHILD
 155 } else {
 156     untested "${testfile}: child"
 157 }