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

   1 # Copyright 2008-2014 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 standard_testfile
  26 set executable_nothr ${testfile}-nothr
  27 set executable_thr ${testfile}-thr
  28
  29 proc corefunc { threadtype executable } {
  30     global srcfile
  31     global srcdir
  32     global subdir
  33     global gdb_prompt
  34
  35     with_test_prefix "$threadtype" {
  36         clean_restart ${executable}
  37
  38         set binfile [standard_output_file $executable]
  39         set escapedbinfile [string_to_regexp ${binfile}]
  40
  41         if [get_compiler_info] {
  42             return -1
  43         }
  44
  45         gdb_test "handle SIGALRM stop print pass" "Yes.*Yes.*Yes.*"
  46
  47         # Start the program running and then wait for a bit, to be sure
  48         # that it can be attached to.
  49         # Statistically there is a better chance without giving process a nice.
  50
  51         set testpid [eval exec $binfile &]
  52         exec sleep 2
  53
  54         # Run 2 passes of the test.
  55         # The C file inferior stops pending its signals if a single one is lost,
  56         # we test successful redelivery of the caught signal by the 2nd pass.
  57
  58         # linux-2.6.20.4.x86_64 had maximal attempt # 20 in 4 test runs.
  59         set attempts 100
  60         set attempt 1
  61         set passes 1
  62         while { $passes < 3 && $attempt <= $attempts } {
  63             set stoppedtry 0
  64             while { $stoppedtry < 10 } {
  65                 if [catch {open /proc/${testpid}/status r} fileid] {
  66                     set stoppedtry 10
  67                     break
  68                 }
  69                 gets $fileid line1
  70                 gets $fileid line2
  71                 close $fileid
  72
  73                 if {![string match "*(stopped)*" $line2]} {
  74                     # No PASS message as we may be looping in multiple
  75                     # attempts.
  76                     break
  77                 }
  78                 sleep 1
  79                 set stoppedtry [expr $stoppedtry + 1]
  80             }
  81             if { $stoppedtry >= 10 } {
  82                 verbose -log $line2
  83                 set test "process is still running on the attempt # $attempt of $attempts"
  84                 break
  85             }
  86
  87             # Main test:
  88             set test "attach (pass $passes), pending signal catch"
  89             if {[gdb_test_multiple "attach $testpid" $test {
  90                 -re "Attaching to program.*`?$escapedbinfile'?, process $testpid.*Program received signal SIGALRM.*$gdb_prompt $" {
  91                     # nonthreaded:
  92                     pass $test
  93                     verbose -log "$test succeeded on the attempt # $attempt of $attempts"
  94                     set passes [expr $passes + 1]
  95                 }
  96                 -re "Attaching to program.*`?$escapedbinfile'?, process $testpid.*$gdb_prompt $" {
  97                     set ok 0
  98
  99                     if { $threadtype == "threaded" } {
 100                         # In the threaded case, the signal is left
 101                         # pending on the second thread.  Check for
 102                         # that by peeking at the thread's siginfo.
 103                         # SIGALRM is 14, SIGSTOP is 19.
 104
 105                         set test2 "thread apply 2 print \$_siginfo.si_signo"
 106                         gdb_test_multiple $test2 $test2 {
 107                             -re " = 14\r\n$gdb_prompt $" {
 108                                 set ok 1
 109                             }
 110                             -re " = 19\r\n$gdb_prompt $" {
 111                             }
 112                         }
 113                     } else {
 114                         # In the nonthreaded case, GDB should tell the
 115                         # user about having seen a signal.
 116                     }
 117
 118                     if { $ok == 0} {
 119                         # We just lack the luck, we should try it again.
 120                         set attempt [expr $attempt + 1]
 121                     } else {
 122                         pass $test
 123                         verbose -log "$test succeeded on the attempt # $attempt of $attempts"
 124                         set passes [expr $passes + 1]
 125                     }
 126                 }
 127             }] != 0 } {
 128                 break
 129             }
 130
 131             gdb_test "detach" "Detaching from.*" ""
 132         }
 133         if {$passes < 3} {
 134             if {$attempt > $attempts} {
 135                 unresolved $test
 136             } else {
 137                 fail $test
 138             }
 139         }
 140
 141         # Exit and detach the process.
 142
 143         gdb_exit
 144
 145         # Make sure we don't leave a process around to confuse the
 146         # next test run (and prevent the compile by keeping the text
 147         # file busy), in case the "set should_exit" didn't work.
 148
 149         # Continue the program - some Linux kernels need it before -9 if the
 150         # process is stopped.
 151         remote_exec build "kill -s CONT ${testpid}"
 152
 153         remote_exec build "kill -9 ${testpid}"
 154
 155     }
 156 }
 157
 158 # build the test case first without threads
 159 #
 160 if {[build_executable $testfile $executable_nothr $srcfile] == -1} {
 161     untested "attach-into-signal.exp (nonthreaded)"
 162     return -1
 163 }
 164
 165 corefunc nonthreaded ${executable_nothr}
 166
 167 # build the test case also with threads
 168 #
 169 if  { [gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" [standard_output_file ${executable_thr}] executable {debug additional_flags=-DUSE_THREADS}] != "" } {
 170     untested "attach-into-signal.exp (threaded)"
 171     return -1
 172 }
 173
 174 corefunc threaded ${executable_thr}