Rewrite pascal_value_print_inner
This rewrites pascal_value_print_inner, copying in the body of pascal_val_print_inner and adusting as needed. This will form the base of future changes to fully convert this to using the value-based API. gdb/ChangeLog 2020-03-13 Tom Tromey <tom@tromey.com> * p-valprint.c (pascal_value_print_inner): Rewrite.
This commit is contained in:
Tom Tromey
parent
6a95a1f58d
commit
64d64d3a76
2 changed files with 340 additions and 2 deletions
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@ -1,3 +1,7 @@
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2020-03-13 Tom Tromey <tom@tromey.com>
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* p-valprint.c (pascal_value_print_inner): Rewrite.
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2020-03-13 Tom Tromey <tom@tromey.com>
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* f-valprint.c (f_value_print_innner): Rewrite.
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338
gdb/p-valprint.c
338
gdb/p-valprint.c
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@ -434,8 +434,342 @@ pascal_value_print_inner (struct value *val, struct ui_file *stream,
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const struct value_print_options *options)
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{
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pascal_val_print (value_type (val), value_embedded_offset (val),
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value_address (val), stream, recurse, val, options);
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struct type *type = check_typedef (value_type (val));
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struct gdbarch *gdbarch = get_type_arch (type);
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enum bfd_endian byte_order = type_byte_order (type);
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unsigned int i = 0; /* Number of characters printed */
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unsigned len;
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struct type *elttype;
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unsigned eltlen;
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int length_pos, length_size, string_pos;
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struct type *char_type;
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CORE_ADDR addr;
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int want_space = 0;
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const gdb_byte *valaddr = value_contents_for_printing (val);
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switch (TYPE_CODE (type))
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{
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case TYPE_CODE_ARRAY:
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{
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LONGEST low_bound, high_bound;
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if (get_array_bounds (type, &low_bound, &high_bound))
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{
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len = high_bound - low_bound + 1;
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elttype = check_typedef (TYPE_TARGET_TYPE (type));
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eltlen = TYPE_LENGTH (elttype);
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if (options->prettyformat_arrays)
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{
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print_spaces_filtered (2 + 2 * recurse, stream);
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}
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/* If 's' format is used, try to print out as string.
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If no format is given, print as string if element type
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is of TYPE_CODE_CHAR and element size is 1,2 or 4. */
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if (options->format == 's'
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|| ((eltlen == 1 || eltlen == 2 || eltlen == 4)
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&& TYPE_CODE (elttype) == TYPE_CODE_CHAR
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&& options->format == 0))
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{
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/* If requested, look for the first null char and only print
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elements up to it. */
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if (options->stop_print_at_null)
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{
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unsigned int temp_len;
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/* Look for a NULL char. */
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for (temp_len = 0;
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extract_unsigned_integer (valaddr + temp_len * eltlen,
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eltlen, byte_order)
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&& temp_len < len && temp_len < options->print_max;
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temp_len++);
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len = temp_len;
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}
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LA_PRINT_STRING (stream, TYPE_TARGET_TYPE (type),
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valaddr, len, NULL, 0, options);
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i = len;
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}
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else
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{
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fprintf_filtered (stream, "{");
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/* If this is a virtual function table, print the 0th
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entry specially, and the rest of the members normally. */
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if (pascal_object_is_vtbl_ptr_type (elttype))
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{
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i = 1;
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fprintf_filtered (stream, "%d vtable entries", len - 1);
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}
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else
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{
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i = 0;
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}
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value_print_array_elements (val, stream, recurse, options, i);
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fprintf_filtered (stream, "}");
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}
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break;
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}
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/* Array of unspecified length: treat like pointer to first elt. */
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addr = value_address (val);
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}
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goto print_unpacked_pointer;
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case TYPE_CODE_PTR:
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if (options->format && options->format != 's')
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{
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value_print_scalar_formatted (val, options, 0, stream);
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break;
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}
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if (options->vtblprint && pascal_object_is_vtbl_ptr_type (type))
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{
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/* Print the unmangled name if desired. */
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/* Print vtable entry - we only get here if we ARE using
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-fvtable_thunks. (Otherwise, look under TYPE_CODE_STRUCT.) */
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/* Extract the address, assume that it is unsigned. */
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addr = extract_unsigned_integer (valaddr,
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TYPE_LENGTH (type), byte_order);
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print_address_demangle (options, gdbarch, addr, stream, demangle);
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break;
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}
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check_typedef (TYPE_TARGET_TYPE (type));
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addr = unpack_pointer (type, valaddr);
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print_unpacked_pointer:
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elttype = check_typedef (TYPE_TARGET_TYPE (type));
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if (TYPE_CODE (elttype) == TYPE_CODE_FUNC)
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{
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/* Try to print what function it points to. */
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print_address_demangle (options, gdbarch, addr, stream, demangle);
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return;
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}
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if (options->addressprint && options->format != 's')
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{
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fputs_filtered (paddress (gdbarch, addr), stream);
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want_space = 1;
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}
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/* For a pointer to char or unsigned char, also print the string
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pointed to, unless pointer is null. */
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if (((TYPE_LENGTH (elttype) == 1
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&& (TYPE_CODE (elttype) == TYPE_CODE_INT
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|| TYPE_CODE (elttype) == TYPE_CODE_CHAR))
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|| ((TYPE_LENGTH (elttype) == 2 || TYPE_LENGTH (elttype) == 4)
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&& TYPE_CODE (elttype) == TYPE_CODE_CHAR))
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&& (options->format == 0 || options->format == 's')
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&& addr != 0)
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{
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if (want_space)
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fputs_filtered (" ", stream);
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/* No wide string yet. */
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i = val_print_string (elttype, NULL, addr, -1, stream, options);
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}
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/* Also for pointers to pascal strings. */
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/* Note: this is Free Pascal specific:
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as GDB does not recognize stabs pascal strings
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Pascal strings are mapped to records
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with lowercase names PM. */
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if (is_pascal_string_type (elttype, &length_pos, &length_size,
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&string_pos, &char_type, NULL)
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&& addr != 0)
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{
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ULONGEST string_length;
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gdb_byte *buffer;
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if (want_space)
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fputs_filtered (" ", stream);
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buffer = (gdb_byte *) xmalloc (length_size);
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read_memory (addr + length_pos, buffer, length_size);
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string_length = extract_unsigned_integer (buffer, length_size,
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byte_order);
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xfree (buffer);
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i = val_print_string (char_type, NULL,
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addr + string_pos, string_length,
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stream, options);
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}
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else if (pascal_object_is_vtbl_member (type))
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{
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/* Print vtbl's nicely. */
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CORE_ADDR vt_address = unpack_pointer (type, valaddr);
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struct bound_minimal_symbol msymbol =
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lookup_minimal_symbol_by_pc (vt_address);
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/* If 'symbol_print' is set, we did the work above. */
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if (!options->symbol_print
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&& (msymbol.minsym != NULL)
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&& (vt_address == BMSYMBOL_VALUE_ADDRESS (msymbol)))
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{
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if (want_space)
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fputs_filtered (" ", stream);
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fputs_filtered ("<", stream);
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fputs_filtered (msymbol.minsym->print_name (), stream);
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fputs_filtered (">", stream);
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want_space = 1;
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}
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if (vt_address && options->vtblprint)
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{
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struct value *vt_val;
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struct symbol *wsym = NULL;
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struct type *wtype;
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if (want_space)
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fputs_filtered (" ", stream);
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if (msymbol.minsym != NULL)
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{
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const char *search_name = msymbol.minsym->search_name ();
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wsym = lookup_symbol_search_name (search_name, NULL,
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VAR_DOMAIN).symbol;
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}
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if (wsym)
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{
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wtype = SYMBOL_TYPE (wsym);
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}
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else
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{
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wtype = TYPE_TARGET_TYPE (type);
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}
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vt_val = value_at (wtype, vt_address);
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common_val_print (vt_val, stream, recurse + 1, options,
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current_language);
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if (options->prettyformat)
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{
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fprintf_filtered (stream, "\n");
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print_spaces_filtered (2 + 2 * recurse, stream);
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}
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}
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}
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return;
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case TYPE_CODE_REF:
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case TYPE_CODE_ENUM:
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case TYPE_CODE_FLAGS:
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case TYPE_CODE_FUNC:
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case TYPE_CODE_RANGE:
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case TYPE_CODE_INT:
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case TYPE_CODE_FLT:
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case TYPE_CODE_VOID:
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case TYPE_CODE_ERROR:
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case TYPE_CODE_UNDEF:
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case TYPE_CODE_BOOL:
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case TYPE_CODE_CHAR:
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generic_value_print (val, stream, recurse, options, &p_decorations);
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break;
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case TYPE_CODE_UNION:
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if (recurse && !options->unionprint)
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{
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fprintf_filtered (stream, "{...}");
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break;
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}
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/* Fall through. */
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case TYPE_CODE_STRUCT:
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if (options->vtblprint && pascal_object_is_vtbl_ptr_type (type))
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{
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/* Print the unmangled name if desired. */
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/* Print vtable entry - we only get here if NOT using
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-fvtable_thunks. (Otherwise, look under TYPE_CODE_PTR.) */
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/* Extract the address, assume that it is unsigned. */
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print_address_demangle
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(options, gdbarch,
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extract_unsigned_integer (valaddr
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+ TYPE_FIELD_BITPOS (type,
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VTBL_FNADDR_OFFSET) / 8,
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TYPE_LENGTH (TYPE_FIELD_TYPE (type,
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VTBL_FNADDR_OFFSET)),
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byte_order),
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stream, demangle);
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}
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else
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{
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if (is_pascal_string_type (type, &length_pos, &length_size,
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&string_pos, &char_type, NULL))
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{
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len = extract_unsigned_integer (valaddr + length_pos,
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length_size, byte_order);
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LA_PRINT_STRING (stream, char_type, valaddr + string_pos,
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len, NULL, 0, options);
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}
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else
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pascal_object_print_value_fields (type, valaddr, 0,
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value_address (val), stream,
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recurse, val, options,
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NULL, 0);
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}
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break;
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case TYPE_CODE_SET:
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elttype = TYPE_INDEX_TYPE (type);
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elttype = check_typedef (elttype);
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if (TYPE_STUB (elttype))
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{
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fprintf_styled (stream, metadata_style.style (), "<incomplete type>");
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break;
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}
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else
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{
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struct type *range = elttype;
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LONGEST low_bound, high_bound;
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int need_comma = 0;
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fputs_filtered ("[", stream);
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int bound_info = get_discrete_bounds (range, &low_bound, &high_bound);
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if (low_bound == 0 && high_bound == -1 && TYPE_LENGTH (type) > 0)
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{
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/* If we know the size of the set type, we can figure out the
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maximum value. */
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bound_info = 0;
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high_bound = TYPE_LENGTH (type) * TARGET_CHAR_BIT - 1;
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TYPE_HIGH_BOUND (range) = high_bound;
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}
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maybe_bad_bstring:
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if (bound_info < 0)
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{
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fputs_styled ("<error value>", metadata_style.style (), stream);
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goto done;
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}
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for (i = low_bound; i <= high_bound; i++)
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{
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int element = value_bit_index (type, valaddr, i);
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if (element < 0)
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{
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i = element;
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goto maybe_bad_bstring;
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}
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if (element)
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{
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if (need_comma)
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fputs_filtered (", ", stream);
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print_type_scalar (range, i, stream);
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need_comma = 1;
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if (i + 1 <= high_bound
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&& value_bit_index (type, valaddr, ++i))
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{
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int j = i;
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fputs_filtered ("..", stream);
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while (i + 1 <= high_bound
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&& value_bit_index (type, valaddr, ++i))
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j = i;
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print_type_scalar (range, j, stream);
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}
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}
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}
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done:
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fputs_filtered ("]", stream);
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}
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break;
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default:
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error (_("Invalid pascal type code %d in symbol table."),
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TYPE_CODE (type));
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}
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}
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