gdb/testsuite/gdb.arch/pa-nullify.exp

   1 # Copyright 2004, 2007 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 file is part of the gdb testsuite.
  17
  18 if $tracelevel {
  19     strace $tracelevel
  20 }
  21
  22 set prms_id 0
  23 set bug_id 0
  24
  25 # Test handling of nullified instructions for the pa target.
  26
  27 switch -glob -- [istarget] {
  28     "hppa-*-*" {
  29         set testfile "pa-nullify"
  30     }
  31     "hppa64-*-*" {
  32         set testfile "pa64-nullify"
  33     }
  34     "*" {
  35         verbose "Skipping hppa nullification tests."
  36         return
  37     }
  38 }
  39
  40 set srcfile ${testfile}.s
  41 set binfile ${objdir}/${subdir}/${testfile}
  42 set gcorefile ${objdir}/${subdir}/${testfile}.gcore
  43
  44 if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {}] != "" } {
  45     unsupported "Testcase compile failed."
  46     return -1
  47 }
  48
  49 gdb_exit
  50 gdb_start
  51 gdb_reinitialize_dir $srcdir/$subdir
  52 gdb_load ${binfile}
  53
  54 # In the first test, we do a "step" on a function whose last instruction
  55 # contains a branch-with-nullify.  The instruction in the delay slot belongs
  56 # to the next function.  We verify that when we step off the first function
  57 # that we end up back at the caller and not at the second instruction.
  58
  59 gdb_breakpoint foo
  60 gdb_test "run" "Breakpoint 1, .* in foo.*" "Breakpoint at foo"
  61
  62 set test "stepi till main"
  63 gdb_test_multiple "stepi" "${test}" {
  64   -re ".*in foo.*$gdb_prompt $" {
  65     send_gdb "stepi\n"
  66     exp_continue -continue_timer
  67   }
  68   -re ".*in bar.*$gdb_prompt $" {
  69     fail $test
  70   }
  71   -re ".*in main.*$gdb_prompt $" {
  72     pass $test
  73   }
  74 }
  75
  76 # In the second test, we verify that we can get a proper backtrace
  77 # even when we are in a nullified instruction that belongs to the next function.
  78 # We also verify that when stepping over a branch-with-nullify insn that we
  79 # stay on the same insn for two steps.
  80
  81 proc get_addr_of_sym { sym } {
  82   set addr 0
  83   global gdb_prompt
  84   global hex
  85
  86   set test "get address of $sym"
  87   gdb_test_multiple "print $sym" $test {
  88     -re ".*($hex) <$sym>.*$gdb_prompt $" {
  89       set addr $expect_out(1,string)
  90       pass $test
  91     }
  92   }
  93
  94   return $addr
  95 }
  96
  97 if { ! [ runto_main ] } then { gdb_suppress_tests; }
  98
  99 set foo [get_addr_of_sym "foo"]
 100 set bar [get_addr_of_sym "bar"]
 101 set foo_last "(bar - 4)"
 102
 103 gdb_breakpoint "*$foo_last"
 104
 105 gdb_test "continue" "Breakpoint \[0-9\]*,.* in foo.*"
 106 gdb_test "backtrace" "in foo.*in main.*" "Backtrace from last insn in foo"
 107 gdb_test "stepi" "in foo.*" "stepi to nullified instruction stays in foo"
 108 gdb_test "backtrace" "in foo.*in main.*" "Backtrace from nullified insn"
 109 gdb_test "stepi" "in main.*" "stepi to main"
 110
 111 # In the third test, we verify that backtraces from nullified instructions
 112 # work even in coredumps
 113
 114 proc gen_core { test } {
 115   global gcorefile
 116   global gdb_prompt
 117   set gcore_works 0
 118   set escapedfilename [string_to_regexp $gcorefile]
 119
 120   # gcore is not yet implemented for HPUX
 121   setup_xfail hppa*-*-hpux*
 122
 123   gdb_test_multiple "gcore $gcorefile" "$test: gcore" {
 124     -re "Saved corefile ${escapedfilename}\[\r\n\]+$gdb_prompt $" {
 125       pass "$test: gcore"
 126       set gcore_works 1
 127     }
 128     -re "Undefined command.*$gdb_prompt $" {
 129       fail "$test: gcore (undefined command)"
 130     }
 131     -re "Can't create a corefile\[\r\n\]+$gdb_prompt $" {
 132       fail "$test: gcore (can't create corefile)"
 133     }
 134   }
 135
 136   return $gcore_works
 137 }
 138
 139 proc test_core_bt { test } {
 140   global gcorefile
 141
 142   gdb_test "core $gcorefile" "Core was generated by.*" \
 143     "$test: load core file" "A program is being debugged already.*" "y"
 144
 145   gdb_test "backtrace" ".*in foo.*in main.*" "$test: backtrace in gcore"
 146 }
 147
 148 set test "core at last insn in foo"
 149 if { ! [ runto_main ] } then { gdb_suppress_tests; }
 150 gdb_breakpoint "*$foo_last"
 151 gdb_test "continue" "Breakpoint \[0-9\]*,.* in foo.*" "$test: continue to breakpoint"
 152 if [gen_core $test] {
 153   test_core_bt $test
 154 }
 155
 156 set test "core at nullified insn"
 157 if { ! [ runto_main ] } then { gdb_suppress_tests; }
 158 gdb_breakpoint "*$foo_last"
 159 gdb_test "continue" "Breakpoint \[0-9\]*,.* in foo.*" "$test: continue to breakpoint"
 160 gdb_test "stepi" ".*in foo.*" "$test: step to nullified instruction"
 161 if [gen_core $test] {
 162   test_core_bt $test
 163 }