# Copyright 2007, 2008, 2009, 2010, 2011 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 . # Author: P. N. Hilfinger, AdaCore, Inc. # This test checks the behavior of formatted print when applied to a # reference value. The intended behavior is that a formatted print of # such a value should display the same value as a plain print, # modulo format, of course. Older versions of GDB would instead print # the reference's address value itself when doing a formatted print, # rather than printing both that and the dereferenced value. We also # check that the (non-standard) expression &(&x), where x is of type T&, # yields an appropriate value. # This also tests that some other arithmetic operations on references # work properly: condition expression using a reference object as one of its # operand. if $tracelevel then { strace $tracelevel } if { [skip_cplus_tests] } { continue } set testfile "formatted-ref" set srcfile ${testfile}.cc set binfile ${objdir}/${subdir}/${testfile} if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug c++}] != "" } { untested formatted-ref.exp return -1 } proc get_address { var } { global expect_out global gdb_prompt gdb_test_multiple "print &$var" "find address of $var" { -re "\\$\[0-9\]+ = \\(.*\\) (0x\[0-9a-f\]+).*$gdb_prompt $" { return $expect_out(1,string) } timeout { perror "couldn't find address of $var" return "" } } return "" } proc test_p_x { var type val addr } { global gdb_prompt set test "print/x $var" gdb_test_multiple $test $test { -re "\\$\[0-9\]+ = \\([string_to_regexp $type]\\) @0x\[a-f0-9\]+: [string_to_regexp $val].*$gdb_prompt $" { pass $test } -re "\\$\[0-9\]+ = $addr.*$gdb_prompt $" { fail "$test (prints just address)" } -re "\\$\[0-9\]+ = 0x\[a-f0-9\]+.*$gdb_prompt $" { fail "$test (prints unexpected address)" } } return 0 } proc test_p_x_addr { var addr } { global gdb_prompt set test "print/x &$var" gdb_test_multiple $test $test { -re "\\$\[0-9\]+ = $addr.*$gdb_prompt $" { pass $test } -re "\\$\[0-9\]+ = 0x\[a-f0-9+\]+.*$gdb_prompt $" { fail "$test (prints unexpected address)" } } return 0 } proc test_p_x_ref_addr { var addr } { global gdb_prompt set test "print/x *(&(&$var))" gdb_test_multiple $test $test { -re "\\$\[0-9\]+ = $addr.*$gdb_prompt $" { pass $test } -re "Attempt to take address of value not located in memory.*$gdb_prompt $" { # The reference might be in a register. At least we parsed # correctly... pass $test } -re "\\$\[0-9\]+ = 0x\[a-f0-9+\]+.*$gdb_prompt $" { fail "$test (prints unexpected address)" } } return 0 } proc test_p_op1_equals_op2 {op1 op2} { set test "print $op1 == $op2" gdb_test $test "\\$\[0-9\]+ = true" } gdb_exit gdb_start gdb_reinitialize_dir $srcdir/$subdir gdb_load ${binfile} runto ${srcfile}:[gdb_get_line_number "marker here"] set s1_address [get_address "s1"] set e1_address [get_address "e1"] set i1_address [get_address "i1"] test_p_x "s" "Struct1 &" "{x = 0xd, y = 0x13}" $s1_address test_p_x "e" "Enum1 &" "0xb" $e1_address test_p_x "i" "int &" "0x17" $i1_address test_p_x_addr "s" $s1_address test_p_x_addr "e" $e1_address test_p_x_addr "i" $i1_address test_p_x_ref_addr "s" $s1_address test_p_x_ref_addr "i" $i1_address test_p_x_ref_addr "e" $e1_address test_p_op1_equals_op2 "s.x" "13"