forked from Imagelibrary/binutils-gdb
f18fc7e56f
This commit allows pointers to be dynamic types (on the outmost
level). Similar to references, a pointer is considered a dynamic type
if its target type is a dynamic type and it is on the outmost level.
Also this commit removes the redundant code inside function
"value_check_printable" for handling of DW_AT_associated type.
The pointer resolution follows the one of references.
This change generally makes the GDB output more verbose. We are able to
print more details about a pointer's target like the dimension of an array.
In Fortran, if we have a pointer to a dynamic type
type buffer
real, dimension(:), pointer :: ptr
end type buffer
type(buffer), pointer :: buffer_ptr
allocate (buffer_ptr)
allocate (buffer_ptr%ptr (5))
which then gets allocated, we now resolve the dynamic type before
printing the pointer's type:
Before:
(gdb) ptype buffer_ptr
type = PTR TO -> ( Type buffer
real(kind=4) :: alpha(:)
End Type buffer )
After:
(gdb) ptype buffer_ptr
type = PTR TO -> ( Type buffer
real(kind=4) :: alpha(5)
End Type buffer )
Similarly in C++ we can dynamically resolve e.g. pointers to arrays:
int len = 3;
int arr[len];
int (*ptr)[len];
int ptr = &arr;
Once the pointer is assigned one gets:
Before:
(gdb) p ptr
$1 = (int (*)[variable length]) 0x123456
(gdb) ptype ptr
type = int (*)[variable length]
After:
(gdb) p ptr
$1 = (int (*)[3]) 0x123456
(gdb) ptype ptr
type = int (*)[3]
For more examples see the modified/added test cases.
Tested-by: Thiago Jung Bauermann <thiago.bauermann@linaro.org>
Approved-By: Tom Tromey <tom@tromey.com>
352 lines
8.5 KiB
Plaintext
352 lines
8.5 KiB
Plaintext
# Copyright 2014-2024 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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load_lib dwarf.exp
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# This test can only be run on targets which support DWARF-2 and use gas.
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require dwarf2_support
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standard_testfile .c -dw.S
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# We need to know the size of integer and address types in order
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# to write some of the debugging info we'd like to generate.
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#
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# For that, we ask GDB by debugging our dynarr-ptr.c program.
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# Any program would do, but since we already have dynarr-ptr.c
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# specifically for this testcase, might as well use that.
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if { [prepare_for_testing "failed to prepare" ${testfile} ${srcfile}] } {
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return -1
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}
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# Make some DWARF for the test.
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set asm_file [standard_output_file $srcfile2]
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Dwarf::assemble $asm_file {
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cu {} {
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DW_TAG_compile_unit {
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{DW_AT_language @DW_LANG_Ada95}
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{DW_AT_name foo.adb}
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{DW_AT_comp_dir /tmp}
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} {
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declare_labels integer_label array_label array_ptr_label \
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array_typedef_label
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set ptr_size [get_sizeof "void *" 96]
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set int_size [get_sizeof "int" 4]
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integer_label: DW_TAG_base_type {
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{DW_AT_byte_size $int_size DW_FORM_sdata}
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{DW_AT_encoding @DW_ATE_signed}
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{DW_AT_name integer}
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}
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array_label: DW_TAG_array_type {
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{DW_AT_name foo__array_type}
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{DW_AT_type :$integer_label}
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{external 1 flag}
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} {
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DW_TAG_subrange_type {
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{DW_AT_type :$integer_label}
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{DW_AT_lower_bound {
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DW_OP_push_object_address
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DW_OP_const1u [expr {2 * $int_size}]
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DW_OP_minus
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DW_OP_deref_size $int_size
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} SPECIAL_expr}
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{DW_AT_upper_bound {
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DW_OP_push_object_address
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DW_OP_const1u $int_size
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DW_OP_minus
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DW_OP_deref_size $int_size
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} SPECIAL_expr}
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}
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}
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array_ptr_label: DW_TAG_pointer_type {
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{DW_AT_byte_size $ptr_size DW_FORM_data1}
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{DW_AT_type :$array_label}
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}
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array_typedef_label: DW_TAG_typedef {
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{DW_AT_name "foo__array_ptr"}
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{DW_AT_type :$array_ptr_label}
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}
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DW_TAG_variable {
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{DW_AT_name foo__three_ptr}
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{DW_AT_type :$array_ptr_label}
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{DW_AT_location {
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DW_OP_addr [gdb_target_symbol table_1_ptr]
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} SPECIAL_expr}
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{external 1 flag}
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}
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DW_TAG_variable {
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{DW_AT_name foo__three_ptr_tdef}
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{DW_AT_type :$array_typedef_label}
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{DW_AT_location {
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DW_OP_addr [gdb_target_symbol table_1_ptr]
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} SPECIAL_expr}
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{external 1 flag}
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}
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DW_TAG_variable {
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{DW_AT_name foo__five_ptr}
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{DW_AT_type :$array_ptr_label}
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{DW_AT_location {
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DW_OP_addr [gdb_target_symbol table_2_ptr]
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} SPECIAL_expr}
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{external 1 flag}
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}
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DW_TAG_variable {
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{DW_AT_name foo__five_ptr_tdef}
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{DW_AT_type :$array_typedef_label}
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{DW_AT_location {
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DW_OP_addr [gdb_target_symbol table_2_ptr]
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} SPECIAL_expr}
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{external 1 flag}
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}
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}
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}
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}
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# Now that we've generated the DWARF debugging info, rebuild our
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# program using our debug info instead of the info generated by
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# the compiler.
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if { [prepare_for_testing "failed to prepare" ${testfile} \
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[list $srcfile $asm_file] {nodebug}] } {
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return -1
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}
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if ![runto_main] {
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return -1
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}
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gdb_test_no_output "set language ada"
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# foo.three_ptr.all
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gdb_test "print foo.three_ptr.all" \
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" = \\(1, 2, 3\\)"
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gdb_test "print foo.three_ptr.all(1)" \
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" = 1"
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gdb_test "print foo.three_ptr.all(2)" \
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" = 2"
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gdb_test "print foo.three_ptr.all(3)" \
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" = 3"
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gdb_test "print foo.three_ptr.all'first" \
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" = 1"
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gdb_test "print foo.three_ptr.all'last" \
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" = 3"
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gdb_test "print foo.three_ptr.all'length" \
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" = 3"
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gdb_test "ptype foo.three_ptr.all" \
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" = array \\(1 \\.\\. 3\\) of integer"
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# foo.three_ptr
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gdb_test "print foo.three_ptr(1)" \
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" = 1"
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gdb_test "print foo.three_ptr(2)" \
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" = 2"
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gdb_test "print foo.three_ptr(3)" \
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" = 3"
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gdb_test "print foo.three_ptr'first" \
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" = 1"
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gdb_test "print foo.three_ptr'last" \
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" = 3"
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gdb_test "print foo.three_ptr'length" \
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" = 3"
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gdb_test "ptype foo.three_ptr" \
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" = access array \\(1 \\.\\. 3\\) of integer"
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# foo.three_ptr_tdef.all
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gdb_test "print foo.three_ptr_tdef.all" \
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" = \\(1, 2, 3\\)"
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gdb_test "print foo.three_ptr_tdef.all(1)" \
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" = 1"
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gdb_test "print foo.three_ptr_tdef.all(2)" \
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" = 2"
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gdb_test "print foo.three_ptr_tdef.all(3)" \
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" = 3"
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gdb_test "print foo.three_ptr_tdef.all'first" \
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" = 1"
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gdb_test "print foo.three_ptr_tdef.all'last" \
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" = 3"
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gdb_test "print foo.three_ptr_tdef.all'length" \
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" = 3"
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gdb_test "ptype foo.three_ptr_tdef.all" \
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" = array \\(1 \\.\\. 3\\) of integer"
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# foo.three_ptr_tdef
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gdb_test "print foo.three_ptr_tdef(1)" \
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" = 1"
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gdb_test "print foo.three_ptr_tdef(2)" \
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" = 2"
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gdb_test "print foo.three_ptr_tdef(3)" \
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" = 3"
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gdb_test "print foo.three_ptr_tdef'first" \
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" = 1"
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gdb_test "print foo.three_ptr_tdef'last" \
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" = 3"
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gdb_test "print foo.three_ptr_tdef'length" \
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" = 3"
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gdb_test "ptype foo.three_ptr_tdef" \
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" = access array \\(1 \\.\\. 3\\) of integer"
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# foo.five_ptr.all
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gdb_test "print foo.five_ptr.all" \
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" = \\(2 => 5, 8, 13, 21, 34\\)"
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gdb_test "print foo.five_ptr.all(2)" \
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" = 5"
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gdb_test "print foo.five_ptr.all(3)" \
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" = 8"
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gdb_test "print foo.five_ptr.all(4)" \
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" = 13"
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gdb_test "print foo.five_ptr.all(5)" \
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" = 21"
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gdb_test "print foo.five_ptr.all(6)" \
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" = 34"
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gdb_test "print foo.five_ptr.all'first" \
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" = 2"
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gdb_test "print foo.five_ptr.all'last" \
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" = 6"
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gdb_test "print foo.five_ptr.all'length" \
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" = 5"
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gdb_test "ptype foo.five_ptr.all" \
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" = array \\(2 \\.\\. 6\\) of integer"
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# foo.five_ptr
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gdb_test "print foo.five_ptr(2)" \
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" = 5"
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gdb_test "print foo.five_ptr(3)" \
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" = 8"
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gdb_test "print foo.five_ptr(4)" \
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" = 13"
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gdb_test "print foo.five_ptr(5)" \
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" = 21"
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gdb_test "print foo.five_ptr(6)" \
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" = 34"
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gdb_test "print foo.five_ptr'first" \
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" = 2"
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gdb_test "print foo.five_ptr'last" \
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" = 6"
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gdb_test "print foo.five_ptr'length" \
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" = 5"
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gdb_test "ptype foo.five_ptr" \
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" = access array \\(2 \\.\\. 6\\) of integer"
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# foo.five_ptr_tdef.all
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gdb_test "print foo.five_ptr_tdef.all" \
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" = \\(2 => 5, 8, 13, 21, 34\\)"
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gdb_test "print foo.five_ptr_tdef.all(2)" \
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" = 5"
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gdb_test "print foo.five_ptr_tdef.all(3)" \
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" = 8"
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gdb_test "print foo.five_ptr_tdef.all(4)" \
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" = 13"
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gdb_test "print foo.five_ptr_tdef.all(5)" \
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" = 21"
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gdb_test "print foo.five_ptr_tdef.all(6)" \
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" = 34"
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gdb_test "print foo.five_ptr_tdef.all'first" \
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" = 2"
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gdb_test "print foo.five_ptr_tdef.all'last" \
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" = 6"
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gdb_test "print foo.five_ptr_tdef.all'length" \
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" = 5"
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gdb_test "ptype foo.five_ptr_tdef.all" \
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" = array \\(2 \\.\\. 6\\) of integer"
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# foo.five_ptr_tdef
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gdb_test "print foo.five_ptr_tdef(2)" \
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" = 5"
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gdb_test "print foo.five_ptr_tdef(3)" \
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" = 8"
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gdb_test "print foo.five_ptr_tdef(4)" \
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" = 13"
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gdb_test "print foo.five_ptr_tdef(5)" \
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" = 21"
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gdb_test "print foo.five_ptr_tdef(6)" \
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" = 34"
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gdb_test "print foo.five_ptr_tdef'first" \
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" = 2"
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gdb_test "print foo.five_ptr_tdef'last" \
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" = 6"
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gdb_test "print foo.five_ptr_tdef'length" \
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" = 5"
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gdb_test "ptype foo.five_ptr_tdef" \
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" = access array \\(2 \\.\\. 6\\) of integer"
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