Trying to print a variable defined as an access to an unconstrained
array:
type String_Access is access String;
S1 : String_Access;
If that variable is null, then GDB prints its value in an odd way:
(gdb) print S1
$1 = (string_bug.string_access) (null)
^^^^^^
This patch changes the debugger behavior to print the pointer using
the same output we'd use for any null pointer:
(gdb) print S1
$1 = (string_bug.string_access) 0x0
It also adds an assert, helping us verify an assumption.
gdb/ChangeLog:
* ada-valprint.c (ada_val_print_1): Print null array pointers as
`0x0' rather than `(null)'. Add assertion.
gdb/testsuite/ChangeLog:
* gdb.ada/arrayptr/foo.adb: Add new local variable Null_String.
* gdb.ada/arrayptr.exp: Add test printing that new variable.
This patch enhances the debugger to distinguish between fat pointers
that represent either: array types, or array access types. In the latter
case, the object/type is encoded as a typedef type pointing to the fat
pointer.
The first part of the change is to adjust ada_check_typedef to avoid
stripping the typedef layer when it points to a fat pointer. The rest
of the patch is adjustments required in various places to deal with
the fact that the type is uses might now be a typedef.
gdb/ChangeLog:
* ada-lang.h (ada_coerce_to_simple_array): Add declaration.
* ada-lang.c (ada_typedef_target_type): New function.
(desc_base_type): Add handling of fat pointer typedefs.
(ada_coerce_to_simple_array): Make non-static.
(decode_packed_array_bitsize): Add handling of fat pointer typedefs.
Add assertion.
(ada_template_to_fixed_record_type_1, ada_to_fixed_type)
(ada_check_typedef): Add handling of fat pointer typedefs.
(ada_evaluate_subexp) [OP_FUNCALL]: Likewise.
* ada-typeprint.c (ada_print_type): Add handling of fat pointer
typedefs.
* ada-valprint.c (ada_val_print_1): Convert fat pointers that are not
array accesses to simple arrays rather than simple array pointers.
(ada_value_print): In the case of array descriptors, do not print
the value type description unless it is an array access.
gdb/testsuite/ChangeLog:
* gdb.ada/lang_switch.exp: Correct expected parameter value.
gdb/doc/ChangeLog:
* gdb.texinfo (Ada Glitches): Remove paragraph describing the
occasional case where the debugger prints an array address
instead of the array itself.
This target_ops routine appears to be unused in practice, so this patch
removes it.
gdb/ChangeLog:
* inf-child.c (inf_child_acknowledge_created_inferior): Delete.
(inf_child_target): Do not set t->to_acknowledge_created_inferior.
* inf-ptrace.c (inf_ptrace_create_inferior): Remove call to
target_acknowledge_created_inferior.
* inf-ttrace.c (inf_ttrace_him): Likewise.
* target.h (struct target_ops): Delete to_acknowledge_created_inferior
field.
(target_acknowledge_created_inferior): Delete.
* target.c (update_current_target): Remove setting of
to_acknowledge_created_inferior field. Do default value for that
field either.
(debug_to_acknowledge_created_inferior): Delete.
(setup_target_debug): Remove setting of
current_target.to_acknowledge_created_inferior.
* breakpoint.c (breakpoint_restore_shadows): When looking for the
location with the lowest address that overlaps the memory range we
want to restore shadows for, account for multiple locations at the
same address.
(mips_elf_make_msymbol_special): Don't set the low bit in the
symbol's address.
(mips_read_pc, mips_unwind_pc, mips_addr_bits_remove): Strip bit
indicating mips16 address, if present.
(mips_write_pc): Set bit indicating mips16 address when in a mips16
function.
(mips_eabi_push_dummy_call, mips_o64_push_dummy_call): Likewise,
but for each function pointer argument to inferior function call.
(mips_convert_register_gpreg_case_p): New functions.
(mips_convert_register_p): Invoke new functions above.
(mips_register_to_value): Add case for fetching value shorter
than 64 bits from a 64-bit register.
(mips_value_to_register): Add case for storing value shorter
than 64 bits into a 64-bit register.
cooked values that are being transferred to 64-bit raw registers.
(mips_pseudo_register_read): Revise to preserve symmetry with
mips_pseudo_register_write().
