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