anon-union.exp

这个是LINUX下的GDB调度工具的源码

# Tests for anonymous union support.
# Copyright 1998, 1999, 2003, 2004 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 2 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, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  

# Written by Satish Pai <[e-mail]> 1997-08-19

# This file is part of the gdb testsuite

if $tracelevel then {
        strace $tracelevel
        }

#
# test running programs
#

set prms_id 0
set bug_id 0

if { [skip_cplus_tests] } { continue }

set testfile "anon-union"
set srcfile ${testfile}.cc
set binfile ${objdir}/${subdir}/${testfile}

if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug c++}] != "" } {
     perror "Testcase compile failed" 0
     continue
}

# Start with a fresh gdb
gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}


if ![runto_main] then {
    perror "couldn't run to breakpoint"
    continue
}

send_gdb "set width 0\n"
gdb_expect -re "$gdb_prompt $"

#send_gdb "ptype foo\n"
#gdb_expect {
#   -re "\r\n$gdb_prompt $" {
#      pass "ptype foo"
#    }
#    -re ".*$gdb_prompt $" { fail "ptype foo" }
#    timeout { fail "(timeout) ptype foo" }
#}

#send_gdb "ptype bar\n"
#gdb_expect {
#   -re "\r\n$gdb_prompt $" {
#      pass "ptype foo"
#    }
#    -re ".*$gdb_prompt $" { fail "ptype foo" }
#    timeout { fail "(timeout) ptype foo" }
#}

# NOTE: Add -- ptype foo.x, etc. when things are working

#Initialize foo
send_gdb "next\n"
gdb_expect {
   -re "40\[ \t\]*foo.paper = 33;\r\n$gdb_prompt $" {
      pass "next 1"
    }
    -re ".*$gdb_prompt $" { fail "next 1" }
    timeout { fail "(timeout) next 1" }
}

# Print out the big anon union.
send_gdb "print foo\n"
gdb_expect {
   -re "\\$\[0-9\]* = \{num1 = \{zero = 0, one = 0\}, \{pebble = 0, x = \{rock = 0, rock2 = 0\}, \{qux = 0, mux = 0\}, boulder = 0\}, \{paper = 0, cloth = 0\}, num2 = \{two = 0, three = 0\}\}\r\n$gdb_prompt $" {
      pass "print foo 1"
    }
    -re ".*$gdb_prompt $" { fail "print foo 1" }
    timeout { fail "(timeout) print foo 1" }
}

# Step over assignment to member

send_gdb "next\n"
gdb_expect {
   -re "41\[ \t\]*foo.pebble = 44;\r\n$gdb_prompt $" {
      pass "next 1"
    }
    -re ".*$gdb_prompt $" { fail "next 1" }
    timeout { fail "(timeout) next 1" }
}

# Now print out anon union again
send_gdb "print foo\n"
gdb_expect {
   -re "\\$\[0-9\]* = \{num1 = \{zero = 0, one = 0\}, \{pebble = 0, x = \{rock = 0, rock2 = 0\}, \{qux = 0, mux = 0\}, boulder = 0\}, \{paper = 33, cloth = 33\}, num2 = \{two = 0, three = 0\}\}\r\n$gdb_prompt $" {
      pass "print foo 2"
    }
    -re ".*$gdb_prompt $" { fail "print foo 2" }
    timeout { fail "(timeout) print foo 2" }
}

# Modify the member just set
send_gdb "set var foo.cloth = 35\n"
gdb_expect {
   -re "\r\n$gdb_prompt $" {
      pass "set var foo.cloth"
    }
    timeout { fail "(timeout) set var foo.cloth" }
}

# Now print out anon union again to see if the right member was set 
send_gdb "print foo\n"
gdb_expect {
   -re "\\$\[0-9\]* = \{num1 = \{zero = 0, one = 0\}, \{pebble = 0, x = \{rock = 0, rock2 = 0\}, \{qux = 0, mux = 0\}, boulder = 0\}, \{paper = 35, cloth = 35\}, num2 = \{two = 0, three = 0\}\}\r\n$gdb_prompt $" {
      pass "print foo 3"
    }
    -re ".*$gdb_prompt $" { fail "print foo 3" }
    timeout { fail "(timeout) print foo 3" }
}


# Step over next assignment to member

send_gdb "next\n"
gdb_expect {
   -re "42\[ \t\]*foo.mux = 55;\r\n$gdb_prompt $" {
      pass "next 2"
    }
    -re ".*$gdb_prompt $" { fail "next 2" }
    timeout { fail "(timeout) next 2" }
}

# Now print out anon union again 
send_gdb "print foo\n"
gdb_expect {
   -re "\\$\[0-9\]* = \{num1 = \{zero = 0, one = 0\}, \{pebble = 44, x = \{rock = 44, rock2 = 0\}, \{qux = 44, mux = 44\}, boulder = 44\}, \{paper = 35, cloth = 35\}, num2 = \{two = 0, three = 0\}\}\r\n$gdb_prompt $" {
      pass "print foo 4"
    }
    -re ".*$gdb_prompt $" { fail "print foo 4" }
    timeout { fail "(timeout) print foo 4" }
}

# Modify the member just set
send_gdb "set var foo.pebble = 45\n"
gdb_expect {
   -re "\r\n$gdb_prompt $" {
      pass "set var foo.pebble"
    }
    timeout { fail "(timeout) set var foo.pebble" }
}

# Now print out anon union again to see if the right member was set 
send_gdb "print foo\n"
gdb_expect {
   -re "\\$\[0-9\]* = \{num1 = \{zero = 0, one = 0\}, \{pebble = 45, x = \{rock = 45, rock2 = 0\}, \{qux = 45, mux = 45\}, boulder = 45\}, \{paper = 35, cloth = 35\}, num2 = \{two = 0, three = 0\}\}\r\n$gdb_prompt $" {
      pass "print foo 5"
    }
    -re ".*$gdb_prompt $" { fail "print foo 5" }
    timeout { fail "(timeout) print foo 5" }
}

# Modify another member at a different level
send_gdb "set var foo.qux = 46\n"
gdb_expect {
   -re "\r\n$gdb_prompt $" {
      pass "set var foo.qux"
    }
    timeout { fail "(timeout) set var foo.qux" }
}

# Now print out anon union again to see if the right member was set 
send_gdb "print foo\n"
gdb_expect {
   -re "\\$\[0-9\]* = \{num1 = \{zero = 0, one = 0\}, \{pebble = 46, x = \{rock = 46, rock2 = 0\}, \{qux = 46, mux = 46\}, boulder = 46\}, \{paper = 35, cloth = 35\}, num2 = \{two = 0, three = 0\}\}\r\n$gdb_prompt $" {
      pass "print foo 6"
    }
    -re ".*$gdb_prompt $" { fail "print foo 6" }
    timeout { fail "(timeout) print foo 6" }
}

# Modify the member at another level, but not the first one in the union
send_gdb "set var foo.mux = 47\n"
gdb_expect {
   -re "\r\n$gdb_prompt $" {
      pass "set var foo.mux"
    }
    timeout { fail "(timeout) set var foo.mux" }
}

# Now print out anon union again to see if things worked
send_gdb "print foo\n"
gdb_expect {
   -re "\\$\[0-9\]* = \{num1 = \{zero = 0, one = 0\}, \{pebble = 47, x = \{rock = 47, rock2 = 0\}, \{qux = 47, mux = 47\}, boulder = 47\}, \{paper = 35, cloth = 35\}, num2 = \{two = 0, three = 0\}\}\r\n$gdb_prompt $" {
      pass "print foo 7"
    }
    -re ".*$gdb_prompt $" { fail "print foo 7" }
    timeout { fail "(timeout) print foo 7" }
}

# Modify a member of a struct in an anon union
send_gdb "set var foo.x.rock = 48\n"
gdb_expect {
   -re "\r\n$gdb_prompt $" {
      pass "set var foo.x.rock"
    }
    timeout { fail "(timeout) set var foo.x.rock" }
}

# Now print out anon union again to see if things worked
send_gdb "print foo\n"
gdb_expect {
   -re "\\$\[0-9\]* = \{num1 = \{zero = 0, one = 0\}, \{pebble = 48, x = \{rock = 48, rock2 = 0\}, \{qux = 48, mux = 48\}, boulder = 48\}, \{paper = 35, cloth = 35\}, num2 = \{two = 0, three = 0\}\}\r\n$gdb_prompt $" {
      pass "print foo 8"
    }
    -re ".*$gdb_prompt $" { fail "print foo 8" }
    timeout { fail "(timeout) print foo 8" }
}

# Modify a member of a struct in an anon union, but something
# that doesn't alias to some other union member
send_gdb "set var foo.x.rock2 = 49\n"
gdb_expect {
   -re "\r\n$gdb_prompt $" {
      pass "set var foo.x.rock2"
    }
    timeout { fail "(timeout) set var foo.x.rock2" }
}

# Now print out anon union again to see if things worked
send_gdb "print foo\n"
gdb_expect {
   -re "\\$\[0-9\]* = \{num1 = \{zero = 0, one = 0\}, \{pebble = 48, x = \{rock = 48, rock2 = 49\}, \{qux = 48, mux = 48\}, boulder = 48\}, \{paper = 35, cloth = 35\}, num2 = \{two = 0, three = 0\}\}\r\n$gdb_prompt $" {
      pass "print foo 9"
    }
    -re ".*$gdb_prompt $" { fail "print foo 9" }
    timeout { fail "(timeout) print foo 9" }
}


# Step over next four assignments
send_gdb "next 4\n"
gdb_expect {
   -re "53\[ \t\]*w = 45;\r\n$gdb_prompt $" {
      pass "next 3"
    }
    -re ".*$gdb_prompt $" { fail "next 3" }
    timeout { fail "(timeout) next 3" }
}

# Tests for anon unions that are not members of a class or struct

send_gdb "print w\n"
gdb_expect {
   -re "\\$\[0-9\]* = 0\r\n$gdb_prompt $" {
      pass "print w 1"
    }
    -re ".*$gdb_prompt $" { fail "print w 1" }
    timeout { fail "(timeout) print w 1" }
}

send_gdb "print z\n"
gdb_expect {
   -re "\\$\[0-9\]* = 0\r\n$gdb_prompt $" {
      pass "print z 1"
    }
    -re ".*$gdb_prompt $" { fail "print z 1" }
    timeout { fail "(timeout) print z 1" }
}

# Step over next assignment to w
send_gdb "next\n"
gdb_expect {
   -re "55\[ \t\]*\}\r\n$gdb_prompt $" {
      pass "next 4"
    }
    -re ".*$gdb_prompt $" { fail "next 4" }
    timeout { fail "(timeout) next 4" }
}

# See if the change in value is noticed
send_gdb "print w\n"
gdb_expect {
   -re "\\$\[0-9\]* = 45\r\n$gdb_prompt $" {
      pass "print w 2"
    }
    -re ".*$gdb_prompt $" { fail "print w 2" }
    timeout { fail "(timeout) print w 2" }
}

# See if z shows the same value
send_gdb "print z\n"
gdb_expect {
   -re "\\$\[0-9\]* = 45\r\n$gdb_prompt $" {
      pass "print z 2"
    }
    -re ".*$gdb_prompt $" { fail "print z 2" }
    timeout { fail "(timeout) print z 2" }
}

# Set the anon union member 
send_gdb "set var z = 27\n"
gdb_expect {
   -re "\r\n$gdb_prompt $" {
      pass "set var z"
    }
    timeout { fail "(timeout) set var z" }
}

# See if the change in value is noticed
send_gdb "print w\n"
gdb_expect {
   -re "\\$\[0-9\]* = 27\r\n$gdb_prompt $" {
      pass "print w 3"
    }
    -re ".*$gdb_prompt $" { fail "print w 3" }
    timeout { fail "(timeout) print w 3" }
}

# See if z shows the same value
send_gdb "print z\n"
gdb_expect {
   -re "\\$\[0-9\]* = 27\r\n$gdb_prompt $" {
      pass "print z 3"
    }
    -re ".*$gdb_prompt $" { fail "print z 3" }
    timeout { fail "(timeout) print z 3" }
}