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# Copyright 2004, 2007, 2008 Free Software Foundation, Inc.

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 3 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program.  If not, see .

#

# This file is part of the gdb testsuite.

if $tracelevel {

    strace $tracelevel

}

set prms_id 0

set bug_id 0

# Test handling of nullified instructions for the pa target.

switch -glob -- [istarget] {

    "hppa-*-*" {

        set testfile "pa-nullify"

    }

    "hppa64-*-*" {

        set testfile "pa64-nullify"

    }

    "*" {

        verbose "Skipping hppa nullification tests."

        return

    }

}

set srcfile ${testfile}.s

set binfile ${objdir}/${subdir}/${testfile}

set gcorefile ${objdir}/${subdir}/${testfile}.gcore

if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {}] != "" } {

    unsupported "Testcase compile failed."

    return -1

}

gdb_exit

gdb_start

gdb_reinitialize_dir $srcdir/$subdir

gdb_load ${binfile}

# In the first test, we do a "step" on a function whose last instruction

# contains a branch-with-nullify.  The instruction in the delay slot belongs

# to the next function.  We verify that when we step off the first function

# that we end up back at the caller and not at the second instruction.

gdb_breakpoint foo

gdb_test "run" "Breakpoint 1, .* in foo.*" "Breakpoint at foo"

set test "stepi till main"

gdb_test_multiple "stepi" "${test}" {

  -re ".*in foo.*$gdb_prompt $" {

    send_gdb "stepi\n"

    exp_continue -continue_timer

  }

  -re ".*in bar.*$gdb_prompt $" {

    fail $test

  }

  -re ".*in main.*$gdb_prompt $" {

    pass $test

  }

}

# In the second test, we verify that we can get a proper backtrace

# even when we are in a nullified instruction that belongs to the next function.

# We also verify that when stepping over a branch-with-nullify insn that we

# stay on the same insn for two steps.

proc get_addr_of_sym { sym } {

  set addr 0

  global gdb_prompt

  global hex

  set test "get address of $sym"

  gdb_test_multiple "print $sym" $test {

    -re ".*($hex) <$sym>.*$gdb_prompt $" {

      set addr $expect_out(1,string)

      pass $test

    }

  }

  return $addr

}

if { ! [ runto_main ] } then { gdb_suppress_tests; }

set foo [get_addr_of_sym "foo"]

set bar [get_addr_of_sym "bar"]

set foo_last "(bar - 4)"

gdb_breakpoint "*$foo_last"

gdb_test "continue" "Breakpoint \[0-9\]*,.* in foo.*"

gdb_test "backtrace" "in foo.*in main.*" "Backtrace from last insn in foo"

gdb_test "stepi" "in foo.*" "stepi to nullified instruction stays in foo"

gdb_test "backtrace" "in foo.*in main.*" "Backtrace from nullified insn"

gdb_test "stepi" "in main.*" "stepi to main"

# In the third test, we verify that backtraces from nullified instructions

# work even in coredumps

proc gen_core { test } {

  global gcorefile

  global gdb_prompt

  set gcore_works 0

  set escapedfilename [string_to_regexp $gcorefile]

  # gcore is not yet implemented for HPUX

  setup_xfail hppa*-*-hpux*

  gdb_test_multiple "gcore $gcorefile" "$test: gcore" {

    -re "Saved corefile ${escapedfilename}\[\r\n\]+$gdb_prompt $" {

      pass "$test: gcore"

      set gcore_works 1

    }

    -re "Undefined command.*$gdb_prompt $" {

      fail "$test: gcore (undefined command)"

    }

    -re "Can't create a corefile\[\r\n\]+$gdb_prompt $" {

      fail "$test: gcore (can't create corefile)"

    }

  }

  return $gcore_works

}

proc test_core_bt { test } {

  global gcorefile

  gdb_test "core $gcorefile" "Core was generated by.*" \

    "$test: load core file" "A program is being debugged already.*" "y"

  gdb_test "backtrace" ".*in foo.*in main.*" "$test: backtrace in gcore"

}

set test "core at last insn in foo"

if { ! [ runto_main ] } then { gdb_suppress_tests; }

gdb_breakpoint "*$foo_last"

gdb_test "continue" "Breakpoint \[0-9\]*,.* in foo.*" "$test: continue to breakpoint"

if [gen_core $test] {

  test_core_bt $test

}

set test "core at nullified insn"

if { ! [ runto_main ] } then { gdb_suppress_tests; }

gdb_breakpoint "*$foo_last"

gdb_test "continue" "Breakpoint \[0-9\]*,.* in foo.*" "$test: continue to breakpoint"

gdb_test "stepi" ".*in foo.*" "$test: step to nullified instruction"

if [gen_core $test] {

  test_core_bt $test

}