gdb/testsuite/gdb.threads/attach-into-signal.exp

   1 # Copyright 2008-2012 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 # This test was created by modifying attach-stopped.exp.
  17 # This file was created by Jan Kratochvil <jan.kratochvil@redhat.com>.
  18
  19 # This test only works on Linux
  20 if { ![isnative] || [is_remote host] || [target_info exists use_gdb_stub]
  21      || ![istarget *-linux*] } {
  22     continue
  23 }
  24
  25 set testfile "attach-into-signal"
  26 set srcfile  ${testfile}.c
  27 set executable_nothr ${testfile}-nothr
  28 set executable_thr ${testfile}-thr
  29
  30 remote_exec build "rm -f ${objdir}/${subdir}/${executable_nothr}"
  31 remote_exec build "rm -f ${objdir}/${subdir}/${executable_thr}"
  32 # For debugging this test
  33 #
  34 #log_user 1
  35
  36 proc corefunc { threadtype executable } {
  37     global srcfile
  38     global srcdir
  39     global objdir
  40     global subdir
  41     global gdb_prompt
  42
  43     with_test_prefix "$threadtype" {
  44         clean_restart ${executable}
  45
  46         set binfile ${objdir}/${subdir}/${executable}
  47         set escapedbinfile [string_to_regexp ${objdir}/${subdir}/${executable}]
  48
  49         if [get_compiler_info] {
  50             return -1
  51         }
  52
  53         gdb_test "handle SIGALRM stop print pass" "Yes.*Yes.*Yes.*"
  54
  55         # Start the program running and then wait for a bit, to be sure
  56         # that it can be attached to.
  57         # Statistically there is a better chance without giving process a nice.
  58
  59         set testpid [eval exec $binfile &]
  60         exec sleep 2
  61
  62         # Run 2 passes of the test.
  63         # The C file inferior stops pending its signals if a single one is lost,
  64         # we test successful redelivery of the caught signal by the 2nd pass.
  65
  66         # linux-2.6.20.4.x86_64 had maximal attempt # 20 in 4 test runs.
  67         set attempts 100
  68         set attempt 1
  69         set passes 1
  70         while { $passes < 3 && $attempt <= $attempts } {
  71             set stoppedtry 0
  72             while { $stoppedtry < 10 } {
  73                 if [catch {open /proc/${testpid}/status r} fileid] {
  74                     set stoppedtry 10
  75                     break
  76                 }
  77                 gets $fileid line1;
  78                 gets $fileid line2;
  79                 close $fileid;
  80
  81                 if {![string match "*(stopped)*" $line2]} {
  82                     # No PASS message as we may be looping in multiple
  83                     # attempts.
  84                     break
  85                 }
  86                 sleep 1
  87                 set stoppedtry [expr $stoppedtry + 1]
  88             }
  89             if { $stoppedtry >= 10 } {
  90                 verbose -log $line2
  91                 set test "process is still running on the attempt # $attempt of $attempts"
  92                 break
  93             }
  94
  95             # Main test:
  96             set test "attach (pass $passes), pending signal catch"
  97             if {[gdb_test_multiple "attach $testpid" $test {
  98                 -re "Attaching to program.*`?$escapedbinfile'?, process $testpid.*Program received signal SIGALRM.*$gdb_prompt $" {
  99                     # nonthreaded:
 100                     pass $test
 101                     verbose -log "$test succeeded on the attempt # $attempt of $attempts"
 102                     set passes [expr $passes + 1]
 103                 }
 104                 -re "Attaching to program.*`?$escapedbinfile'?, process $testpid.*$gdb_prompt $" {
 105                     set ok 0
 106
 107                     if { $threadtype == "threaded" } {
 108                         # In the threaded case, the signal is left
 109                         # pending on the second thread.  Check for
 110                         # that by peeking at the thread's siginfo.
 111                         # SIGALRM is 14, SIGSTOP is 19.
 112
 113                         # With remote targets, we need to pull the
 114                         # thread list explicitly before GDB even knows
 115                         # about thread 2.
 116                         set test2 "pull thread list"
 117                         gdb_test_multiple "info threads" $test2 {
 118                             -re "\r\n$gdb_prompt $" {
 119                             }
 120                         }
 121
 122                         set test2 "thread apply 2 print \$_siginfo.si_signo"
 123                         gdb_test_multiple $test2 $test2 {
 124                             -re " = 14\r\n$gdb_prompt $" {
 125                                 set ok 1
 126                             }
 127                             -re " = 19\r\n$gdb_prompt $" {
 128                             }
 129                         }
 130                     } else {
 131                         # In the nonthreaded case, GDB should tell the
 132                         # user about having seen a signal.
 133                     }
 134
 135                     if { $ok == 0} {
 136                         # We just lack the luck, we should try it again.
 137                         set attempt [expr $attempt + 1]
 138                     } else {
 139                         pass $test
 140                         verbose -log "$test succeeded on the attempt # $attempt of $attempts"
 141                         set passes [expr $passes + 1]
 142                     }
 143                 }
 144             }] != 0 } {
 145                 break
 146             }
 147
 148             gdb_test "detach" "Detaching from.*" ""
 149         }
 150         if {$passes < 3} {
 151             if {$attempt > $attempts} {
 152                 unresolved $test
 153             } else {
 154                 fail $test
 155             }
 156         }
 157
 158         # Exit and detach the process.
 159
 160         gdb_exit
 161
 162         # Make sure we don't leave a process around to confuse the
 163         # next test run (and prevent the compile by keeping the text
 164         # file busy), in case the "set should_exit" didn't work.
 165
 166         # Continue the program - some Linux kernels need it before -9 if the
 167         # process is stopped.
 168         remote_exec build "kill -s CONT ${testpid}"
 169
 170         remote_exec build "kill -9 ${testpid}"
 171
 172     }
 173 }
 174
 175 # build the test case first without threads
 176 #
 177 if {[build_executable $testfile $executable_nothr $srcfile] == -1} {
 178     untested "attach-into-signal.exp (nonthreaded)"
 179     return -1
 180 }
 181
 182 corefunc nonthreaded ${executable_nothr}
 183
 184 # build the test case also with threads
 185 #
 186 if  { [gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${objdir}/${subdir}/${executable_thr}" executable {debug additional_flags=-DUSE_THREADS}] != "" } {
 187     untested "attach-into-signal.exp (threaded)"
 188     return -1
 189 }
 190
 191 corefunc threaded ${executable_thr}