clang-tests/gdb-1472-testsuite/src/gdb/gdb.apple/check-errno.exp

# Copyright 2007 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.  

# The shared cache in Leopard means that we have to deal with the
# library slides differently between libraries in & out of the shared cache.
# This file just tests that we can read the errno variable correctly.
# Since libSystem is pretty surely going to be in the shared cache,
# this is a good sniff test that we are getting the data sections of
# libraries in the shared cache correctly.

if $tracelevel then {
        strace $tracelevel
        }

#
# test running programs
#

set prms_id 0
set bug_id 0


set testfile "check-errno"
set srcfile ${testfile}.c
set binfile ${objdir}/${subdir}/${testfile}
    
global srcdir objdir subdir gdb_prompt srcfile testfile binfile hex
    
if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug} ] != "" } {
  gdb_suppress_entire_file "Testcase compile failed, so all tests in this file will automatically fail."
}
    
# Start with a fresh gdb
gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_file_cmd "${binfile}"
    
send_gdb "set width 0\n"
gdb_expect -re "$gdb_prompt $"

send_gdb "set locate-dsym 0\n"
gdb_expect -re "$gdb_prompt $"
    
gdb_test "break [gdb_get_line_number "Good place to break first"]" "Breakpoint 1 at $hex: file.*, line.*\\." \
  "Set breakpoint on line  'Good place to break first'"
    
gdb_test "break [gdb_get_line_number "Good place to break second"]" "Breakpoint 2 at $hex: file.*, line.*\\." \
  "Set breakpoint on line  'Good place to break second'"
    
gdb_test "run" "Starting program: $binfile *\r\n\Reading symbols for shared libraries \(\[.+\]\)+ done.*Breakpoint 1, main.*" \
  "run to first breakpoint in main()"
    
send_gdb "print \(int\) errno\n" 
gdb_expect {
    -re {\$[0-9]+ = ([-]?[0-9]+)} {
	set errno_first $expect_out(1,string)
	if {$errno_first == 0} {
	    pass "errno should be 0 after we set it to 0"
	} else {
	    fail "errno should be 0 after we set it to 0 - probably not getting shared cache correctly"
	}
	gdb_expect -re "$gdb_prompt $"
    }
    -re "$gdb_prompt $" {
	fail "could not print errno after we set it"
    }
    timeout {fail "(timeout) printing errno after we set it"}
}

gdb_test "continue" {Continuing\.(\r\n)+Breakpoint 2, main.*} "continue to second breakpoint in main."
    
gdb_test {print result} {\$[0-9]+ = -1} "result of stat should be -1"

send_gdb "print \(unsigned int\) errno\n" 
gdb_expect {
    -re {\$[0-9]+ = ([-]?[0-9]+)} {
	set errno_second $expect_out(1,string)
	if {$errno_first != $errno_second && $errno_second != 0} {
	    pass "errno should have changed after the stat call"
	} else {
	    fail "errno should have changed after the stat call"
	}
    }
    -re "$gdb_prompt $" {
	fail "could not print errno after the stat call"
    }
    timeout {fail "(timeout) printing errno after the stat call"}
}


gdb_exit