gdb/testsuite/gdb.threads/stepi-random-signal.exp

   1 # Copyright 2013-2014 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 standard_testfile
  17 set executable ${testfile}
  18
  19 if { [gdb_compile_pthreads \
  20           "${srcdir}/${subdir}/${srcfile}" \
  21           "${binfile}" \
  22           executable {debug}] != "" } {
  23     untested "Couldn't compile test program."
  24     return -1
  25 }
  26
  27 clean_restart $executable
  28
  29 # Start the second thread.
  30 if ![runto start] {
  31     return -1
  32 }
  33
  34 # Go back to the main thread, and leave it in the loop, where we're
  35 # reasonably sure we don't have 'conditional jmp $pc'-like
  36 # instructions.  We wouldn't be able to detect whether a stepi makes
  37 # progress over those.
  38 gdb_test_no_output "set scheduler-locking on"
  39 gdb_test "thread 1" "Switching to .*"
  40 gdb_breakpoint $srcfile:[gdb_get_line_number "set break 2 here"]
  41 gdb_continue_to_breakpoint "loop" ".* set break 2 here .*"
  42
  43 # Now back to thread 2, and let it queue a signal in thread 1.
  44 gdb_test "thread 2" "Switching to .*"
  45 gdb_breakpoint $srcfile:[gdb_get_line_number "set break here"]
  46 gdb_continue_to_breakpoint "after pthread_kill" ".* set break here .*"
  47
  48 # We're now ready to stepi thread 1.  It should immediately dequeue
  49 # the signal.
  50 gdb_test "thread 1" "Switching to .*" "thread 1 again"
  51
  52 # No longer need these.
  53 delete_breakpoints
  54
  55 # Turn on infrun debugging, so we can tell whether the signal is
  56 # really dequeued and that GDB sees it.
  57 gdb_test_no_output "set debug infrun 1"
  58
  59 # Make sure the target backend reports the signal to GDB core.  Some
  60 # backends (like Linux) skip reporting a signal if set to
  61 # pass/nostop/noprint, resuming the thread immediately instead.
  62 gdb_test "handle SIGCHLD print"
  63
  64 # Helper to extract the current PC.  PREFIX is used to make each call
  65 # have its own unique test name.
  66
  67 proc get_pc { prefix } {
  68     with_test_prefix "$prefix" {
  69         return [get_hexadecimal_valueof "\$pc" ""]
  70     }
  71 }
  72
  73 set prev_addr [get_pc "before stepi"]
  74 if {$prev_addr == ""} {
  75     return
  76 }
  77
  78 # True if we saw the infrun path we want to test be exercised.
  79 set seen 0
  80
  81 set test "stepi"
  82 if {[gdb_test_multiple "stepi" "$test" {
  83     -re "infrun: random signal" {
  84         set seen 1
  85         exp_continue
  86     }
  87     -re "$gdb_prompt $" {
  88     }
  89 }] != 0} {
  90     return
  91 }
  92
  93 if {$seen} {
  94     pass "$test"
  95 } else {
  96     fail "$test (no random signal)"
  97 }
  98
  99 set addr [get_pc "after stepi"]
 100 if {$addr == ""} {
 101     return
 102 }
 103
 104 set test "stepi interfered by signal makes progress"
 105 if {$addr == $prev_addr} {
 106     fail "$test"
 107 } else {
 108     pass "$test"
 109 }