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# Copyright 2017-2020 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 <http://www.gnu.org/licenses/>.
load_lib dwarf.exp
# This test can only be run on targets which support DWARF-2 and use gas.
if {![dwarf2_support]} {
return 0
}
standard_testfile .c -dw.S
# We need to know the size of integer and address types in order
# to write some of the debugging info we'd like to generate.
#
# For that, we ask GDB by debugging our ada-valprint-error.c program.
# Any program would do, but since we already have ada-valprint-error.c
# specifically for this testcase, might as well use that.
if { [prepare_for_testing ${testfile}.exp ${testfile} ${srcfile}] } {
untested ${testfile}.exp
return -1
}
# Make some DWARF for the test.
set asm_file [standard_output_file $srcfile2]
Dwarf::assemble $asm_file {
cu {} {
DW_TAG_compile_unit {
{DW_AT_language @DW_LANG_Ada95}
{DW_AT_name fd.adb}
{DW_AT_comp_dir /tmp}
} {
declare_labels array_elt_label integer_label array_label \
typedef_label ref_type_label
set ptr_size [get_sizeof "void *" 96]
set int_size [get_sizeof "int" 4]
# A structure with no size attribute, to mimick structures
# in Ada that have a dynamic size...
array_elt_label: structure_type {
{name fd__Tints_doubledC}
{artificial 1 DW_FORM_flag_present}
}
# ... and a corresponding XVZ variable, supposed to be there
# to provide the actual size. Except that, in this case,
# the variable has no address, to simulate the fact that
# it has been optimized out (which the compiler can do,
# even if it at the expense of debuggability).
DW_TAG_variable {
{name fd__Tints_doubledC___XVZ}
{DW_AT_type :$integer_label}
{artificial 1 DW_FORM_flag_present}
}
integer_label: DW_TAG_base_type {
{DW_AT_byte_size $int_size DW_FORM_sdata}
{DW_AT_encoding @DW_ATE_signed}
{DW_AT_name integer}
}
array_label: DW_TAG_array_type {
{DW_AT_name fd__ints_doubled}
{DW_AT_type :$array_elt_label}
} {
DW_TAG_subrange_type {
{DW_AT_type :$integer_label}
{DW_AT_upper_bound 2 DW_FORM_data1}
}
}
typedef_label: DW_TAG_typedef {
{DW_AT_name fd__ints_doubled}
{DW_AT_type :$array_label}
}
ref_type_label: DW_TAG_reference_type {
{DW_AT_byte_size $ptr_size DW_FORM_sdata}
{DW_AT_type :$typedef_label}
}
DW_TAG_variable {
{name fd__global}
{DW_AT_type :$ref_type_label}
{DW_AT_location {
DW_OP_addr [gdb_target_symbol fd__global]
} SPECIAL_expr}
{external 1 flag}
}
}
}
}
if { [prepare_for_testing ${testfile}.exp ${testfile} \
[list $srcfile $asm_file] {nodebug}] } {
return -1
}
gdb_test_no_output "set language ada"
gdb_test "print fd.global" \
" = <error reading variable: unable to read value of fd__Tints_doubledC___XVZ \\(value has been optimized out\\)>"
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