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old-cross-binutils/gdb/f-typeprint.c
Keven Boell 3f2f83ddcb fort_dyn_array: add basic fortran dyn array support 
Fortran provide types whose values may be dynamically allocated
or associated with a variable under explicit program control.
The purpose of this commit is:

  * to read allocated/associated DWARF tags and store them in
    the dynamic property list of main_type.

  * enable GDB to print the value of a dynamic array in Fortran
    in case the type is allocated or associated (pointer to
    dynamic array).

Examples:
    (gdb) p vla_not_allocated
    $1 = <not allocated>

    (gdb) p vla_allocated
    $1 = (1, 2, 3)

    (gdb) p vla_ptr_not_associated
    $1 = <not associated>

    (gdb) p vla_ptr_associated
    $1 = (1, 2, 3)

Add basic test coverage for most dynamic array use-cases in Fortran.
The commit contains the following tests:
  * Ensure that values of Fortran dynamic arrays
    can be evaluated correctly in various ways and states.
  * Ensure that Fortran primitives can be evaluated
    correctly when used as a dynamic array.
  * Dynamic arrays passed to subroutines and handled
    in different ways inside the routine.
  * Ensure that the ptype of dynamic arrays in
    Fortran can be printed in GDB correctly.
  * Ensure that dynamic arrays in different states
    (allocated/associated) can be evaluated.
  * Dynamic arrays passed to functions and returned from
    functions.
  * History values of dynamic arrays can be accessed and
    printed again with the correct values.
  * Dynamic array evaluations using MI protocol.
  * Sizeof output of dynamic arrays in various states.

The patch was tested using the test suite on Ubuntu 12.04 64bit.

gdb/ChangeLog:

        * dwarf2read.c (set_die_type): Add read of
        DW_AT_allocated and DW_AT_associated.
        * f-typeprint.c: New include of typeprint.h
        (f_print_type): Add check for allocated/associated
        status of type.
        (f_type_print_varspec_suffix): Add check for
        allocated/associated status of type.
        * gdbtypes.c (create_array_type_with_stride):
        Add check for valid data location of type in
        case allocated or associated attributes are set.
        Length of an array should be only calculated if
        allocated or associated is resolved as true.
        (is_dynamic_type_internal): Add check for allocated/
        associated.
        (resolve_dynamic_array): Evaluate allocated/associated
        properties.
        * gdbtypes.h (enum dynamic_prop_node_kind): <DYN_PROP_ALLOCATED>
        <DYN_PROP_ASSOCIATED>: New enums.
        (TYPE_ALLOCATED_PROP, TYPE_ASSOCIATED_PROP): New macros.
        (type_not_allocated): New function.
        (type_not_associated): New function.
        * valarith.c (value_subscripted_rvalue): Add check for
        allocated/associated.
        * valprint.c: New include of typeprint.h.
        (valprint_check_validity): Add check for allocated/associated.
        (value_check_printable): Add check for allocated/
        associated.
        * typeprint.h (val_print_not_allocated): New function.
        (val_print_not_associated): New function.
        * typeprint.c (val_print_not_allocated): New function.
        (val_print_not_associated): New function.

gdb/testsuite/ChangeLog:

        * gdb.fortran/vla-alloc-assoc.exp: New file.
        * gdb.fortran/vla-datatypes.exp: New file.
        * gdb.fortran/vla-datatypes.f90: New file.
        * gdb.fortran/vla-history.exp: New file.
        * gdb.fortran/vla-ptype-sub.exp: New file.
        * gdb.fortran/vla-ptype.exp: New file.
        * gdb.fortran/vla-sizeof.exp: New file.
        * gdb.fortran/vla-sub.f90: New file.
        * gdb.fortran/vla-value-sub-arbitrary.exp: New file.
        * gdb.fortran/vla-value-sub-finish.exp: New file.
        * gdb.fortran/vla-value-sub.exp: New file.
        * gdb.fortran/vla-value.exp: New file.
        * gdb.fortran/vla-ptr-info.exp: New file.
        * gdb.mi/mi-vla-fortran.exp: New file.
        * gdb.mi/vla.f90: New file.
2015-10-21 15:37:46 -04:00

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/* Support for printing Fortran types for GDB, the GNU debugger.
Copyright (C) 1986-2015 Free Software Foundation, Inc.
Contributed by Motorola. Adapted from the C version by Farooq Butt
(fmbutt@engage.sps.mot.com).
This file is part of GDB.
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/>. */
#include "defs.h"
#include "gdb_obstack.h"
#include "bfd.h"
#include "symtab.h"
#include "gdbtypes.h"
#include "expression.h"
#include "value.h"
#include "gdbcore.h"
#include "target.h"
#include "f-lang.h"
#include "typeprint.h"
#if 0 /* Currently unused. */
static void f_type_print_args (struct type *, struct ui_file *);
#endif
static void f_type_print_varspec_suffix (struct type *, struct ui_file *, int,
int, int, int);
void f_type_print_varspec_prefix (struct type *, struct ui_file *,
int, int);
void f_type_print_base (struct type *, struct ui_file *, int, int);
/* LEVEL is the depth to indent lines by. */
void
f_print_type (struct type *type, const char *varstring, struct ui_file *stream,
int show, int level, const struct type_print_options *flags)
{
enum type_code code;
int demangled_args;
if (type_not_associated (type))
{
val_print_not_associated (stream);
return;
}
if (type_not_allocated (type))
{
val_print_not_allocated (stream);
return;
}
f_type_print_base (type, stream, show, level);
code = TYPE_CODE (type);
if ((varstring != NULL && *varstring != '\0')
/* Need a space if going to print stars or brackets;
but not if we will print just a type name. */
|| ((show > 0 || TYPE_NAME (type) == 0)
&& (code == TYPE_CODE_PTR || code == TYPE_CODE_FUNC
|| code == TYPE_CODE_METHOD
|| code == TYPE_CODE_ARRAY
|| code == TYPE_CODE_REF)))
fputs_filtered (" ", stream);
f_type_print_varspec_prefix (type, stream, show, 0);
if (varstring != NULL)
{
fputs_filtered (varstring, stream);
/* For demangled function names, we have the arglist as part of the name,
so don't print an additional pair of ()'s. */
demangled_args = varstring[strlen (varstring) - 1] == ')';
f_type_print_varspec_suffix (type, stream, show, 0, demangled_args, 0);
}
}
/* Print any asterisks or open-parentheses needed before the
variable name (to describe its type).
On outermost call, pass 0 for PASSED_A_PTR.
On outermost call, SHOW > 0 means should ignore
any typename for TYPE and show its details.
SHOW is always zero on recursive calls. */
void
f_type_print_varspec_prefix (struct type *type, struct ui_file *stream,
int show, int passed_a_ptr)
{
if (type == 0)
return;
if (TYPE_NAME (type) && show <= 0)
return;
QUIT;
switch (TYPE_CODE (type))
{
case TYPE_CODE_PTR:
f_type_print_varspec_prefix (TYPE_TARGET_TYPE (type), stream, 0, 1);
break;
case TYPE_CODE_FUNC:
f_type_print_varspec_prefix (TYPE_TARGET_TYPE (type), stream, 0, 0);
if (passed_a_ptr)
fprintf_filtered (stream, "(");
break;
case TYPE_CODE_ARRAY:
f_type_print_varspec_prefix (TYPE_TARGET_TYPE (type), stream, 0, 0);
break;
case TYPE_CODE_UNDEF:
case TYPE_CODE_STRUCT:
case TYPE_CODE_UNION:
case TYPE_CODE_ENUM:
case TYPE_CODE_INT:
case TYPE_CODE_FLT:
case TYPE_CODE_VOID:
case TYPE_CODE_ERROR:
case TYPE_CODE_CHAR:
case TYPE_CODE_BOOL:
case TYPE_CODE_SET:
case TYPE_CODE_RANGE:
case TYPE_CODE_STRING:
case TYPE_CODE_METHOD:
case TYPE_CODE_REF:
case TYPE_CODE_COMPLEX:
case TYPE_CODE_TYPEDEF:
/* These types need no prefix. They are listed here so that
gcc -Wall will reveal any types that haven't been handled. */
break;
}
}
/* Print any array sizes, function arguments or close parentheses
needed after the variable name (to describe its type).
Args work like c_type_print_varspec_prefix. */
static void
f_type_print_varspec_suffix (struct type *type, struct ui_file *stream,
int show, int passed_a_ptr, int demangled_args,
int arrayprint_recurse_level)
{
int upper_bound, lower_bound;
/* No static variables are permitted as an error call may occur during
execution of this function. */
if (type == 0)
return;
if (TYPE_NAME (type) && show <= 0)
return;
QUIT;
switch (TYPE_CODE (type))
{
case TYPE_CODE_ARRAY:
arrayprint_recurse_level++;
if (arrayprint_recurse_level == 1)
fprintf_filtered (stream, "(");
if (type_not_associated (type))
val_print_not_associated (stream);
else if (type_not_allocated (type))
val_print_not_allocated (stream);
else
{
if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_ARRAY)
f_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, 0,
0, 0, arrayprint_recurse_level);
lower_bound = f77_get_lowerbound (type);
if (lower_bound != 1) /* Not the default. */
fprintf_filtered (stream, "%d:", lower_bound);
/* Make sure that, if we have an assumed size array, we
print out a warning and print the upperbound as '*'. */
if (TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type))
fprintf_filtered (stream, "*");
else
{
upper_bound = f77_get_upperbound (type);
fprintf_filtered (stream, "%d", upper_bound);
}
if (TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_ARRAY)
f_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, 0,
0, 0, arrayprint_recurse_level);
}
if (arrayprint_recurse_level == 1)
fprintf_filtered (stream, ")");
else
fprintf_filtered (stream, ",");
arrayprint_recurse_level--;
break;
case TYPE_CODE_PTR:
case TYPE_CODE_REF:
f_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, 0, 1, 0,
arrayprint_recurse_level);
fprintf_filtered (stream, ")");
break;
case TYPE_CODE_FUNC:
f_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, 0,
passed_a_ptr, 0, arrayprint_recurse_level);
if (passed_a_ptr)
fprintf_filtered (stream, ")");
fprintf_filtered (stream, "()");
break;
case TYPE_CODE_UNDEF:
case TYPE_CODE_STRUCT:
case TYPE_CODE_UNION:
case TYPE_CODE_ENUM:
case TYPE_CODE_INT:
case TYPE_CODE_FLT:
case TYPE_CODE_VOID:
case TYPE_CODE_ERROR:
case TYPE_CODE_CHAR:
case TYPE_CODE_BOOL:
case TYPE_CODE_SET:
case TYPE_CODE_RANGE:
case TYPE_CODE_STRING:
case TYPE_CODE_METHOD:
case TYPE_CODE_COMPLEX:
case TYPE_CODE_TYPEDEF:
/* These types do not need a suffix. They are listed so that
gcc -Wall will report types that may not have been considered. */
break;
}
}
/* Print the name of the type (or the ultimate pointer target,
function value or array element), or the description of a
structure or union.
SHOW nonzero means don't print this type as just its name;
show its real definition even if it has a name.
SHOW zero means print just typename or struct tag if there is one
SHOW negative means abbreviate structure elements.
SHOW is decremented for printing of structure elements.
LEVEL is the depth to indent by.
We increase it for some recursive calls. */
void
f_type_print_base (struct type *type, struct ui_file *stream, int show,
int level)
{
int upper_bound;
int index;
QUIT;
wrap_here (" ");
if (type == NULL)
{
fputs_filtered ("<type unknown>", stream);
return;
}
/* When SHOW is zero or less, and there is a valid type name, then always
just print the type name directly from the type. */
if ((show <= 0) && (TYPE_NAME (type) != NULL))
{
fputs_filtered (TYPE_NAME (type), stream);
return;
}
if (TYPE_CODE (type) != TYPE_CODE_TYPEDEF)
type = check_typedef (type);
switch (TYPE_CODE (type))
{
case TYPE_CODE_TYPEDEF:
f_type_print_base (TYPE_TARGET_TYPE (type), stream, 0, level);
break;
case TYPE_CODE_ARRAY:
case TYPE_CODE_FUNC:
f_type_print_base (TYPE_TARGET_TYPE (type), stream, show, level);
break;
case TYPE_CODE_PTR:
fprintf_filtered (stream, "PTR TO -> ( ");
f_type_print_base (TYPE_TARGET_TYPE (type), stream, 0, level);
break;
case TYPE_CODE_REF:
fprintf_filtered (stream, "REF TO -> ( ");
f_type_print_base (TYPE_TARGET_TYPE (type), stream, 0, level);
break;
case TYPE_CODE_VOID:
fprintfi_filtered (level, stream, "VOID");
break;
case TYPE_CODE_UNDEF:
fprintfi_filtered (level, stream, "struct <unknown>");
break;
case TYPE_CODE_ERROR:
fprintfi_filtered (level, stream, "%s", TYPE_ERROR_NAME (type));
break;
case TYPE_CODE_RANGE:
/* This should not occur. */
fprintfi_filtered (level, stream, "<range type>");
break;
case TYPE_CODE_CHAR:
case TYPE_CODE_INT:
/* There may be some character types that attempt to come
through as TYPE_CODE_INT since dbxstclass.h is so
C-oriented, we must change these to "character" from "char". */
if (strcmp (TYPE_NAME (type), "char") == 0)
fprintfi_filtered (level, stream, "character");
else
goto default_case;
break;
case TYPE_CODE_STRING:
/* Strings may have dynamic upperbounds (lengths) like arrays. */
if (TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type))
fprintfi_filtered (level, stream, "character*(*)");
else
{
upper_bound = f77_get_upperbound (type);
fprintf_filtered (stream, "character*%d", upper_bound);
}
break;
case TYPE_CODE_STRUCT:
case TYPE_CODE_UNION:
if (TYPE_CODE (type) == TYPE_CODE_UNION)
fprintfi_filtered (level, stream, "Type, C_Union :: ");
else
fprintfi_filtered (level, stream, "Type ");
fputs_filtered (TYPE_TAG_NAME (type), stream);
fputs_filtered ("\n", stream);
for (index = 0; index < TYPE_NFIELDS (type); index++)
{
f_type_print_base (TYPE_FIELD_TYPE (type, index), stream, show,
level + 4);
fputs_filtered (" :: ", stream);
fputs_filtered (TYPE_FIELD_NAME (type, index), stream);
f_type_print_varspec_suffix (TYPE_FIELD_TYPE (type, index),
stream, 0, 0, 0, 0);
fputs_filtered ("\n", stream);
}
fprintfi_filtered (level, stream, "End Type ");
fputs_filtered (TYPE_TAG_NAME (type), stream);
break;
case TYPE_CODE_MODULE:
fprintfi_filtered (level, stream, "module %s", TYPE_TAG_NAME (type));
break;
default_case:
default:
/* Handle types not explicitly handled by the other cases,
such as fundamental types. For these, just print whatever
the type name is, as recorded in the type itself. If there
is no type name, then complain. */
if (TYPE_NAME (type) != NULL)
fprintfi_filtered (level, stream, "%s", TYPE_NAME (type));
else
error (_("Invalid type code (%d) in symbol table."), TYPE_CODE (type));
break;
}
}
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