| /* Support for printing Modula 2 values for GDB, the GNU debugger. |
| |
| Copyright (C) 1986, 1988, 1989, 1991, 1992, 1996, 1998, 2000, 2005, 2006, |
| 2007 Free Software Foundation, Inc. |
| |
| 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 2 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, write to the Free Software |
| Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| Boston, MA 02110-1301, USA. */ |
| |
| #include "defs.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; |
| |
| 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 |
| print_unpacked_pointer (struct type *type, |
| CORE_ADDR address, CORE_ADDR addr, |
| int format, struct ui_file *stream) |
| { |
| 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); |
| } |