/* Support for printing Modula 2 values for GDB, the GNU debugger.
- Copyright 1986, 1988, 1989, 1991 Free Software Foundation, Inc.
-This file is part of GDB.
+ Copyright (C) 1986, 1988, 1989, 1991, 1992, 1996, 1998,
+ 2000, 2005, 2006
+ 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 2 of the License, or
-(at your option) any later version.
+ This file is part of GDB.
-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.
+ 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 2 of the License, or
+ (at your option) any later version.
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ 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, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
#include "defs.h"
-#include "obstack.h"
#include "symtab.h"
#include "gdbtypes.h"
+#include "expression.h"
+#include "value.h"
#include "valprint.h"
+#include "language.h"
+#include "typeprint.h"
+#include "c-lang.h"
#include "m2-lang.h"
+#include "target.h"
+
+int print_unpacked_pointer (struct type *type,
+ CORE_ADDR address, CORE_ADDR addr,
+ int format, struct ui_file *stream);
+
+
+/* Print function pointer with inferior address ADDRESS onto stdio
+ stream STREAM. */
+
+static void
+print_function_pointer_address (CORE_ADDR address, struct ui_file *stream)
+{
+ CORE_ADDR func_addr = gdbarch_convert_from_func_ptr_addr (current_gdbarch,
+ address,
+ ¤t_target);
+
+ /* If the function pointer is represented by a description, print the
+ address of the description. */
+ if (addressprint && func_addr != address)
+ {
+ fputs_filtered ("@", stream);
+ fputs_filtered (paddress (address), stream);
+ fputs_filtered (": ", stream);
+ }
+ print_address_demangle (func_addr, stream, demangle);
+}
+
+/*
+ * get_long_set_bounds - assigns the bounds of the long set to low and high.
+ */
+
+int
+get_long_set_bounds (struct type *type, LONGEST *low, LONGEST *high)
+{
+ int len, i;
+
+ if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
+ {
+ len = TYPE_NFIELDS (type);
+ i = TYPE_N_BASECLASSES (type);
+ if (len == 0)
+ return 0;
+ *low = TYPE_LOW_BOUND (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, i)));
+ *high = TYPE_HIGH_BOUND (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type,
+ len-1)));
+ return 1;
+ }
+ error (_("expecting long_set"));
+ return 0;
+}
+
+static void
+m2_print_long_set (struct type *type, const gdb_byte *valaddr,
+ int embedded_offset, CORE_ADDR address,
+ struct ui_file *stream, int format,
+ enum val_prettyprint pretty)
+{
+ int empty_set = 1;
+ int element_seen = 0;
+ LONGEST previous_low = 0;
+ LONGEST previous_high= 0;
+ LONGEST i, low_bound, high_bound;
+ LONGEST field_low, field_high;
+ struct type *range;
+ int len, field;
+ struct type *target;
+ int bitval;
+
+ CHECK_TYPEDEF (type);
+
+ fprintf_filtered (stream, "{");
+ len = TYPE_NFIELDS (type);
+ if (get_long_set_bounds (type, &low_bound, &high_bound))
+ {
+ field = TYPE_N_BASECLASSES (type);
+ range = TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, field));
+ }
+ else
+ {
+ fprintf_filtered (stream, " %s }", _("<unknown bounds of set>"));
+ return;
+ }
+
+ target = TYPE_TARGET_TYPE (range);
+ if (target == NULL)
+ target = builtin_type_int;
-/* FIXME: For now, just explicitly declare c_val_print and use it instead */
+ if (get_discrete_bounds (range, &field_low, &field_high) >= 0)
+ {
+ for (i = low_bound; i <= high_bound; i++)
+ {
+ bitval = value_bit_index (TYPE_FIELD_TYPE (type, field),
+ (TYPE_FIELD_BITPOS (type, field) / 8) +
+ valaddr + embedded_offset, i);
+ if (bitval < 0)
+ error (_("bit test is out of range"));
+ else if (bitval > 0)
+ {
+ previous_high = i;
+ if (! element_seen)
+ {
+ if (! empty_set)
+ fprintf_filtered (stream, ", ");
+ print_type_scalar (target, i, stream);
+ empty_set = 0;
+ element_seen = 1;
+ previous_low = i;
+ }
+ }
+ else
+ {
+ /* bit is not set */
+ if (element_seen)
+ {
+ if (previous_low+1 < previous_high)
+ fprintf_filtered (stream, "..");
+ if (previous_low+1 < previous_high)
+ print_type_scalar (target, previous_high, stream);
+ element_seen = 0;
+ }
+ }
+ if (i == field_high)
+ {
+ field++;
+ if (field == len)
+ break;
+ range = TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, field));
+ if (get_discrete_bounds (range, &field_low, &field_high) < 0)
+ break;
+ target = TYPE_TARGET_TYPE (range);
+ if (target == NULL)
+ target = builtin_type_int;
+ }
+ }
+ if (element_seen)
+ {
+ if (previous_low+1 < previous_high)
+ {
+ fprintf_filtered (stream, "..");
+ print_type_scalar (target, previous_high, stream);
+ }
+ element_seen = 0;
+ }
+ fprintf_filtered (stream, "}");
+ }
+}
int
-m2_val_print (type, valaddr, embedded_offset, address,
- stream, format, deref_ref, recurse, pretty)
- struct type *type;
- char *valaddr;
- int embedded_offset;
- CORE_ADDR address;
- GDB_FILE *stream;
- int format;
- int deref_ref;
- int recurse;
- enum val_prettyprint pretty;
+print_unpacked_pointer (struct type *type,
+ CORE_ADDR address, CORE_ADDR addr,
+ int format, struct ui_file *stream)
{
- extern int
- c_val_print PARAMS ((struct type *, char *, int, CORE_ADDR,
- GDB_FILE *, int, int, int, enum val_prettyprint));
- return (c_val_print (type, valaddr, 0, address, stream, format, deref_ref,
- recurse, pretty));
+ struct type *elttype = check_typedef (TYPE_TARGET_TYPE (type));
+
+ if (TYPE_CODE (elttype) == TYPE_CODE_FUNC)
+ {
+ /* Try to print what function it points to. */
+ print_function_pointer_address (addr, stream);
+ /* Return value is irrelevant except for string pointers. */
+ return 0;
+ }
+
+ if (addressprint && format != 's')
+ fputs_filtered (paddress (address), stream);
+
+ /* For a pointer to char or unsigned char, also print the string
+ pointed to, unless pointer is null. */
+
+ if (TYPE_LENGTH (elttype) == 1
+ && TYPE_CODE (elttype) == TYPE_CODE_INT
+ && (format == 0 || format == 's')
+ && addr != 0)
+ return val_print_string (addr, -1, TYPE_LENGTH (elttype), stream);
+
+ return 0;
+}
+
+static void
+print_variable_at_address (struct type *type, const gdb_byte *valaddr,
+ struct ui_file *stream, int format,
+ int deref_ref, int recurse,
+ enum val_prettyprint pretty)
+{
+ CORE_ADDR addr = unpack_pointer (type, valaddr);
+ struct type *elttype = check_typedef (TYPE_TARGET_TYPE (type));
+
+ fprintf_filtered (stream, "[");
+ fputs_filtered (paddress (addr), stream);
+ fprintf_filtered (stream, "] : ");
+
+ if (TYPE_CODE (elttype) != TYPE_CODE_UNDEF)
+ {
+ struct value *deref_val =
+ value_at
+ (TYPE_TARGET_TYPE (type),
+ unpack_pointer (lookup_pointer_type (builtin_type_void),
+ valaddr));
+ common_val_print (deref_val, stream, format, deref_ref,
+ recurse, pretty);
+ }
+ else
+ fputs_filtered ("???", stream);
+}
+
+/* Print data of type TYPE located at VALADDR (within GDB), which came from
+ the inferior at address ADDRESS, onto stdio stream STREAM according to
+ FORMAT (a letter or 0 for natural format). The data at VALADDR is in
+ target byte order.
+
+ If the data are a string pointer, returns the number of string characters
+ printed.
+
+ If DEREF_REF is nonzero, then dereference references, otherwise just print
+ them like pointers.
+
+ The PRETTY parameter controls prettyprinting. */
+
+int
+m2_val_print (struct type *type, const gdb_byte *valaddr, int embedded_offset,
+ CORE_ADDR address, struct ui_file *stream, int format,
+ int deref_ref, int recurse, enum val_prettyprint pretty)
+{
+ unsigned int i = 0; /* Number of characters printed */
+ unsigned len;
+ struct type *elttype;
+ unsigned eltlen;
+ int length_pos, length_size, string_pos;
+ int char_size;
+ LONGEST val;
+ CORE_ADDR addr;
+
+ CHECK_TYPEDEF (type);
+ switch (TYPE_CODE (type))
+ {
+ case TYPE_CODE_ARRAY:
+ if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > 0)
+ {
+ elttype = check_typedef (TYPE_TARGET_TYPE (type));
+ eltlen = TYPE_LENGTH (elttype);
+ len = TYPE_LENGTH (type) / eltlen;
+ if (prettyprint_arrays)
+ print_spaces_filtered (2 + 2 * recurse, stream);
+ /* For an array of chars, print with string syntax. */
+ if (eltlen == 1 &&
+ ((TYPE_CODE (elttype) == TYPE_CODE_INT)
+ || ((current_language->la_language == language_m2)
+ && (TYPE_CODE (elttype) == TYPE_CODE_CHAR)))
+ && (format == 0 || format == 's'))
+ {
+ /* If requested, look for the first null char and only print
+ elements up to it. */
+ if (stop_print_at_null)
+ {
+ unsigned int temp_len;
+
+ /* Look for a NULL char. */
+ for (temp_len = 0;
+ (valaddr + embedded_offset)[temp_len]
+ && temp_len < len && temp_len < print_max;
+ temp_len++);
+ len = temp_len;
+ }
+
+ LA_PRINT_STRING (stream, valaddr + embedded_offset, len, 1, 0);
+ i = len;
+ }
+ else
+ {
+ fprintf_filtered (stream, "{");
+ val_print_array_elements (type, valaddr + embedded_offset,
+ address, stream, format, deref_ref,
+ recurse, pretty, 0);
+ fprintf_filtered (stream, "}");
+ }
+ break;
+ }
+ /* Array of unspecified length: treat like pointer to first elt. */
+ print_unpacked_pointer (type, address, address, format, stream);
+ break;
+
+ case TYPE_CODE_PTR:
+ if (TYPE_CONST (type))
+ print_variable_at_address (type, valaddr + embedded_offset,
+ stream, format, deref_ref, recurse,
+ pretty);
+ else if (format && format != 's')
+ print_scalar_formatted (valaddr + embedded_offset, type, format,
+ 0, stream);
+ else
+ {
+ addr = unpack_pointer (type, valaddr + embedded_offset);
+ print_unpacked_pointer (type, addr, address, format, stream);
+ }
+ break;
+
+ case TYPE_CODE_REF:
+ elttype = check_typedef (TYPE_TARGET_TYPE (type));
+ if (addressprint)
+ {
+ CORE_ADDR addr
+ = extract_typed_address (valaddr + embedded_offset, type);
+ fprintf_filtered (stream, "@");
+ fputs_filtered (paddress (addr), stream);
+ if (deref_ref)
+ fputs_filtered (": ", stream);
+ }
+ /* De-reference the reference. */
+ if (deref_ref)
+ {
+ if (TYPE_CODE (elttype) != TYPE_CODE_UNDEF)
+ {
+ struct value *deref_val =
+ value_at
+ (TYPE_TARGET_TYPE (type),
+ unpack_pointer (lookup_pointer_type (builtin_type_void),
+ valaddr + embedded_offset));
+ common_val_print (deref_val, stream, format, deref_ref,
+ recurse, pretty);
+ }
+ else
+ fputs_filtered ("???", stream);
+ }
+ break;
+
+ case TYPE_CODE_UNION:
+ if (recurse && !unionprint)
+ {
+ fprintf_filtered (stream, "{...}");
+ break;
+ }
+ /* Fall through. */
+ case TYPE_CODE_STRUCT:
+ if (m2_is_long_set (type))
+ m2_print_long_set (type, valaddr, embedded_offset, address,
+ stream, format, pretty);
+ else
+ cp_print_value_fields (type, type, valaddr, embedded_offset,
+ address, stream, format,
+ recurse, pretty, NULL, 0);
+ break;
+
+ case TYPE_CODE_ENUM:
+ if (format)
+ {
+ print_scalar_formatted (valaddr + embedded_offset, type,
+ format, 0, stream);
+ break;
+ }
+ len = TYPE_NFIELDS (type);
+ val = unpack_long (type, valaddr + embedded_offset);
+ for (i = 0; i < len; i++)
+ {
+ QUIT;
+ if (val == TYPE_FIELD_BITPOS (type, i))
+ {
+ break;
+ }
+ }
+ if (i < len)
+ {
+ fputs_filtered (TYPE_FIELD_NAME (type, i), stream);
+ }
+ else
+ {
+ print_longest (stream, 'd', 0, val);
+ }
+ break;
+
+ case TYPE_CODE_FUNC:
+ if (format)
+ {
+ print_scalar_formatted (valaddr + embedded_offset, type,
+ format, 0, stream);
+ break;
+ }
+ /* FIXME, we should consider, at least for ANSI C language, eliminating
+ the distinction made between FUNCs and POINTERs to FUNCs. */
+ fprintf_filtered (stream, "{");
+ type_print (type, "", stream, -1);
+ fprintf_filtered (stream, "} ");
+ /* Try to print what function it points to, and its address. */
+ print_address_demangle (address, stream, demangle);
+ break;
+
+ case TYPE_CODE_BOOL:
+ format = format ? format : output_format;
+ if (format)
+ print_scalar_formatted (valaddr + embedded_offset, type,
+ format, 0, stream);
+ else
+ {
+ val = unpack_long (type, valaddr + embedded_offset);
+ if (val == 0)
+ fputs_filtered ("FALSE", stream);
+ else if (val == 1)
+ fputs_filtered ("TRUE", stream);
+ else
+ fprintf_filtered (stream, "%ld)", (long int) val);
+ }
+ break;
+
+ case TYPE_CODE_RANGE:
+ if (TYPE_LENGTH (type) == TYPE_LENGTH (TYPE_TARGET_TYPE (type)))
+ {
+ m2_val_print (TYPE_TARGET_TYPE (type), valaddr, embedded_offset,
+ address, stream, format, deref_ref, recurse, pretty);
+ break;
+ }
+ /* FIXME: create_range_type does not set the unsigned bit in a
+ range type (I think it probably should copy it from the target
+ type), so we won't print values which are too large to
+ fit in a signed integer correctly. */
+ /* FIXME: Doesn't handle ranges of enums correctly. (Can't just
+ print with the target type, though, because the size of our type
+ and the target type might differ). */
+ /* FALLTHROUGH */
+
+ case TYPE_CODE_INT:
+ format = format ? format : output_format;
+ if (format)
+ print_scalar_formatted (valaddr + embedded_offset, type, format,
+ 0, stream);
+ else
+ val_print_type_code_int (type, valaddr + embedded_offset, stream);
+ break;
+
+ case TYPE_CODE_CHAR:
+ format = format ? format : output_format;
+ if (format)
+ print_scalar_formatted (valaddr + embedded_offset, type,
+ format, 0, stream);
+ else
+ {
+ val = unpack_long (type, valaddr + embedded_offset);
+ if (TYPE_UNSIGNED (type))
+ fprintf_filtered (stream, "%u", (unsigned int) val);
+ else
+ fprintf_filtered (stream, "%d", (int) val);
+ fputs_filtered (" ", stream);
+ LA_PRINT_CHAR ((unsigned char) val, stream);
+ }
+ break;
+
+ case TYPE_CODE_FLT:
+ if (format)
+ print_scalar_formatted (valaddr + embedded_offset, type,
+ format, 0, stream);
+ else
+ print_floating (valaddr + embedded_offset, type, stream);
+ break;
+
+ case TYPE_CODE_METHOD:
+ break;
+
+ case TYPE_CODE_BITSTRING:
+ case TYPE_CODE_SET:
+ elttype = TYPE_INDEX_TYPE (type);
+ CHECK_TYPEDEF (elttype);
+ if (TYPE_STUB (elttype))
+ {
+ fprintf_filtered (stream, _("<incomplete type>"));
+ gdb_flush (stream);
+ break;
+ }
+ else
+ {
+ struct type *range = elttype;
+ LONGEST low_bound, high_bound;
+ int i;
+ int is_bitstring = TYPE_CODE (type) == TYPE_CODE_BITSTRING;
+ int need_comma = 0;
+
+ if (is_bitstring)
+ fputs_filtered ("B'", stream);
+ else
+ fputs_filtered ("{", stream);
+
+ i = get_discrete_bounds (range, &low_bound, &high_bound);
+ maybe_bad_bstring:
+ if (i < 0)
+ {
+ fputs_filtered (_("<error value>"), stream);
+ goto done;
+ }
+
+ for (i = low_bound; i <= high_bound; i++)
+ {
+ int element = value_bit_index (type, valaddr + embedded_offset,
+ i);
+ if (element < 0)
+ {
+ i = element;
+ goto maybe_bad_bstring;
+ }
+ if (is_bitstring)
+ fprintf_filtered (stream, "%d", element);
+ else if (element)
+ {
+ if (need_comma)
+ fputs_filtered (", ", stream);
+ print_type_scalar (range, i, stream);
+ need_comma = 1;
+
+ if (i + 1 <= high_bound
+ && value_bit_index (type, valaddr + embedded_offset,
+ ++i))
+ {
+ int j = i;
+ fputs_filtered ("..", stream);
+ while (i + 1 <= high_bound
+ && value_bit_index (type,
+ valaddr + embedded_offset,
+ ++i))
+ j = i;
+ print_type_scalar (range, j, stream);
+ }
+ }
+ }
+ done:
+ if (is_bitstring)
+ fputs_filtered ("'", stream);
+ else
+ fputs_filtered ("}", stream);
+ }
+ break;
+
+ case TYPE_CODE_VOID:
+ fprintf_filtered (stream, "void");
+ break;
+
+ case TYPE_CODE_ERROR:
+ fprintf_filtered (stream, _("<error type>"));
+ break;
+
+ case TYPE_CODE_UNDEF:
+ /* This happens (without TYPE_FLAG_STUB set) on systems which don't use
+ dbx xrefs (NO_DBX_XREFS in gcc) if a file has a "struct foo *bar"
+ and no complete type for struct foo in that file. */
+ fprintf_filtered (stream, _("<incomplete type>"));
+ break;
+
+ default:
+ error (_("Invalid m2 type code %d in symbol table."), TYPE_CODE (type));
+ }
+ gdb_flush (stream);
+ return (0);
}
projects / deliverable / binutils-gdb.git / blobdiff