gnu/dist/gdb6/gdb/testsuite/gdb.arch/pa-nullify.exp

   1 # Copyright 2004 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 2 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, write to the Free Software
  15 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  16 #
  17 # This file is part of the gdb testsuite.
  18
  19 if $tracelevel {
  20     strace $tracelevel
  21 }
  22
  23 set prms_id 0
  24 set bug_id 0
  25
  26 # Test handling of nullified instructions for the pa target.
  27
  28 switch -glob -- [istarget] {
  29     "hppa-*-*" {
  30         set testfile "pa-nullify"
  31     }
  32     "hppa64-*-*" {
  33         set testfile "pa64-nullify"
  34     }
  35     "*" {
  36         verbose "Skipping hppa nullification tests."
  37         return
  38     }
  39 }
  40
  41 set srcfile ${testfile}.s
  42 set binfile ${objdir}/${subdir}/${testfile}
  43 set gcorefile ${objdir}/${subdir}/${testfile}.gcore
  44
  45 if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {}] != "" } {
  46     unsupported "Testcase compile failed."
  47     return -1
  48 }
  49
  50 gdb_exit
  51 gdb_start
  52 gdb_reinitialize_dir $srcdir/$subdir
  53 gdb_load ${binfile}
  54
  55 # In the first test, we do a "step" on a function whose last instruction
  56 # contains a branch-with-nullify.  The instruction in the delay slot belongs
  57 # to the next function.  We verify that when we step off the first function
  58 # that we end up back at the caller and not at the second instruction.
  59
  60 gdb_breakpoint foo
  61 gdb_test "run" "Breakpoint 1, .* in foo.*" "Breakpoint at foo"
  62
  63 set test "stepi till main"
  64 gdb_test_multiple "stepi" "${test}" {
  65   -re ".*in foo.*$gdb_prompt $" {
  66     send_gdb "stepi\n"
  67     exp_continue -continue_timer
  68   }
  69   -re ".*in bar.*$gdb_prompt $" {
  70     fail $test
  71   }
  72   -re ".*in main.*$gdb_prompt $" {
  73     pass $test
  74   }
  75 }
  76
  77 # In the second test, we verify that we can get a proper backtrace
  78 # even when we are in a nullified instruction that belongs to the next function.
  79 # We also verify that when stepping over a branch-with-nullify insn that we
  80 # stay on the same insn for two steps.
  81
  82 proc get_addr_of_sym { sym } {
  83   set addr 0
  84   global gdb_prompt
  85   global hex
  86
  87   set test "get address of $sym"
  88   gdb_test_multiple "print $sym" $test {
  89     -re ".*($hex) <$sym>.*$gdb_prompt $" {
  90       set addr $expect_out(1,string)
  91       pass $test
  92     }
  93   }
  94
  95   return $addr
  96 }
  97
  98 if { ! [ runto_main ] } then { gdb_suppress_tests; }
  99
 100 set foo [get_addr_of_sym "foo"]
 101 set bar [get_addr_of_sym "bar"]
 102 set foo_last "(bar - 4)"
 103
 104 gdb_breakpoint "*$foo_last"
 105
 106 gdb_test "continue" "Breakpoint \[0-9\]*,.* in foo.*"
 107 gdb_test "backtrace" "in foo.*in main.*" "Backtrace from last insn in foo"
 108 gdb_test "stepi" "in foo.*" "stepi to nullified instruction stays in foo"
 109 gdb_test "backtrace" "in foo.*in main.*" "Backtrace from nullified insn"
 110 gdb_test "stepi" "in main.*" "stepi to main"
 111
 112 # In the third test, we verify that backtraces from nullified instructions
 113 # work even in coredumps
 114
 115 proc gen_core { test } {
 116   global gcorefile
 117   global gdb_prompt
 118   set gcore_works 0
 119   set escapedfilename [string_to_regexp $gcorefile]
 120
 121   # gcore is not yet implemented for HPUX
 122   setup_xfail hppa*-*-hpux*
 123
 124   gdb_test_multiple "gcore $gcorefile" "$test: gcore" {
 125     -re "Saved corefile ${escapedfilename}\[\r\n\]+$gdb_prompt $" {
 126       pass "$test: gcore"
 127       set gcore_works 1
 128     }
 129     -re "Undefined command.*$gdb_prompt $" {
 130       fail "$test: gcore (undefined command)"
 131     }
 132     -re "Can't create a corefile\[\r\n\]+$gdb_prompt $" {
 133       fail "$test: gcore (can't create corefile)"
 134     }
 135   }
 136
 137   return $gcore_works
 138 }
 139
 140 proc test_core_bt { test } {
 141   global gcorefile
 142
 143   gdb_test "core $gcorefile" "Core was generated by.*" \
 144     "$test: load core file" "A program is being debugged already.*" "y"
 145
 146   gdb_test "backtrace" ".*in foo.*in main.*" "$test: backtrace in gcore"
 147 }
 148
 149 set test "core at last insn in foo"
 150 if { ! [ runto_main ] } then { gdb_suppress_tests; }
 151 gdb_breakpoint "*$foo_last"
 152 gdb_test "continue" "Breakpoint \[0-9\]*,.* in foo.*" "$test: continue to breakpoint"
 153 if [gen_core $test] {
 154   test_core_bt $test
 155 }
 156
 157 set test "core at nullified insn"
 158 if { ! [ runto_main ] } then { gdb_suppress_tests; }
 159 gdb_breakpoint "*$foo_last"
 160 gdb_test "continue" "Breakpoint \[0-9\]*,.* in foo.*" "$test: continue to breakpoint"
 161 gdb_test "stepi" ".*in foo.*" "$test: step to nullified instruction"
 162 if [gen_core $test] {
 163   test_core_bt $test
 164 }