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844781a1be
statement about unbounded arrays being unimplemented. * m2-valprint.c (m2_print_array_contents): New function. (m2_print_unbounded_array): New function. (m2_print_array_contents): New function. * m2-typeprint.c (m2_unbounded_array): New function. (m2_is_unbounded_array): New function. (m2_print_type): Test for unbounded array when walking across structs. * m2-lang.h: Added extern m2_is_unbounded_array. * m2-lang.c (evaluate_subexp_modula2): New function. (exp_descriptor_modula2): New structure. (m2_language_defn): Use exp_descriptor_modula2. * m2-exp.y: Added TSIZE and binary subscript.
617 lines
18 KiB
C
617 lines
18 KiB
C
/* Modula 2 language support routines for GDB, the GNU debugger.
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Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 2000, 2002, 2003, 2004,
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2005, 2007 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "symtab.h"
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#include "gdbtypes.h"
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#include "expression.h"
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#include "parser-defs.h"
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#include "language.h"
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#include "m2-lang.h"
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#include "c-lang.h"
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#include "valprint.h"
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extern void _initialize_m2_language (void);
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static struct type *m2_create_fundamental_type (struct objfile *, int);
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static void m2_printchar (int, struct ui_file *);
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static void m2_emit_char (int, struct ui_file *, int);
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/* Print the character C on STREAM as part of the contents of a literal
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string whose delimiter is QUOTER. Note that that format for printing
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characters and strings is language specific.
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FIXME: This is a copy of the same function from c-exp.y. It should
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be replaced with a true Modula version. */
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static void
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m2_emit_char (int c, struct ui_file *stream, int quoter)
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{
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c &= 0xFF; /* Avoid sign bit follies */
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if (PRINT_LITERAL_FORM (c))
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{
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if (c == '\\' || c == quoter)
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{
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fputs_filtered ("\\", stream);
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}
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fprintf_filtered (stream, "%c", c);
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}
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else
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{
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switch (c)
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{
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case '\n':
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fputs_filtered ("\\n", stream);
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break;
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case '\b':
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fputs_filtered ("\\b", stream);
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break;
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case '\t':
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fputs_filtered ("\\t", stream);
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break;
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case '\f':
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fputs_filtered ("\\f", stream);
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break;
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case '\r':
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fputs_filtered ("\\r", stream);
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break;
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case '\033':
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fputs_filtered ("\\e", stream);
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break;
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case '\007':
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fputs_filtered ("\\a", stream);
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break;
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default:
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fprintf_filtered (stream, "\\%.3o", (unsigned int) c);
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break;
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}
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}
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}
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/* FIXME: This is a copy of the same function from c-exp.y. It should
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be replaced with a true Modula version. */
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static void
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m2_printchar (int c, struct ui_file *stream)
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{
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fputs_filtered ("'", stream);
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LA_EMIT_CHAR (c, stream, '\'');
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fputs_filtered ("'", stream);
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}
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/* Print the character string STRING, printing at most LENGTH characters.
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Printing stops early if the number hits print_max; repeat counts
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are printed as appropriate. Print ellipses at the end if we
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had to stop before printing LENGTH characters, or if FORCE_ELLIPSES.
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FIXME: This is a copy of the same function from c-exp.y. It should
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be replaced with a true Modula version. */
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static void
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m2_printstr (struct ui_file *stream, const gdb_byte *string,
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unsigned int length, int width, int force_ellipses)
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{
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unsigned int i;
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unsigned int things_printed = 0;
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int in_quotes = 0;
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int need_comma = 0;
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if (length == 0)
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{
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fputs_filtered ("\"\"", gdb_stdout);
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return;
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}
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for (i = 0; i < length && things_printed < print_max; ++i)
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{
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/* Position of the character we are examining
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to see whether it is repeated. */
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unsigned int rep1;
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/* Number of repetitions we have detected so far. */
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unsigned int reps;
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QUIT;
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if (need_comma)
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{
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fputs_filtered (", ", stream);
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need_comma = 0;
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}
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rep1 = i + 1;
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reps = 1;
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while (rep1 < length && string[rep1] == string[i])
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{
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++rep1;
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++reps;
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}
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if (reps > repeat_count_threshold)
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{
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if (in_quotes)
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{
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if (inspect_it)
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fputs_filtered ("\\\", ", stream);
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else
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fputs_filtered ("\", ", stream);
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in_quotes = 0;
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}
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m2_printchar (string[i], stream);
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fprintf_filtered (stream, " <repeats %u times>", reps);
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i = rep1 - 1;
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things_printed += repeat_count_threshold;
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need_comma = 1;
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}
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else
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{
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if (!in_quotes)
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{
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if (inspect_it)
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fputs_filtered ("\\\"", stream);
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else
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fputs_filtered ("\"", stream);
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in_quotes = 1;
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}
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LA_EMIT_CHAR (string[i], stream, '"');
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++things_printed;
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}
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}
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/* Terminate the quotes if necessary. */
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if (in_quotes)
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{
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if (inspect_it)
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fputs_filtered ("\\\"", stream);
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else
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fputs_filtered ("\"", stream);
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}
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if (force_ellipses || i < length)
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fputs_filtered ("...", stream);
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}
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static struct value *
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evaluate_subexp_modula2 (struct type *expect_type, struct expression *exp,
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int *pos, enum noside noside)
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{
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enum exp_opcode op = exp->elts[*pos].opcode;
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struct value *arg1;
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struct value *arg2;
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struct type *type;
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switch (op)
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{
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case UNOP_HIGH:
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(*pos)++;
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arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
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if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
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return arg1;
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else
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{
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arg1 = coerce_ref (arg1);
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type = check_typedef (value_type (arg1));
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if (m2_is_unbounded_array (type))
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{
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struct value *temp = arg1;
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type = TYPE_FIELD_TYPE (type, 1);
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/* i18n: Do not translate the "_m2_high" part! */
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arg1 = value_struct_elt (&temp, NULL, "_m2_high", NULL,
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_("unbounded structure "
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"missing _m2_high field"));
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if (value_type (arg1) != type)
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arg1 = value_cast (type, arg1);
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}
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}
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return arg1;
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case BINOP_SUBSCRIPT:
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(*pos)++;
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arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
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arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
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if (noside == EVAL_SKIP)
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goto nosideret;
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/* If the user attempts to subscript something that is not an
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array or pointer type (like a plain int variable for example),
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then report this as an error. */
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arg1 = coerce_ref (arg1);
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type = check_typedef (value_type (arg1));
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if (m2_is_unbounded_array (type))
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{
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struct value *temp = arg1;
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type = TYPE_FIELD_TYPE (type, 0);
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if (type == NULL || (TYPE_CODE (type) != TYPE_CODE_PTR)) {
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warning (_("internal error: unbounded array structure is unknown"));
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return evaluate_subexp_standard (expect_type, exp, pos, noside);
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}
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/* i18n: Do not translate the "_m2_contents" part! */
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arg1 = value_struct_elt (&temp, NULL, "_m2_contents", NULL,
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_("unbounded structure "
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"missing _m2_contents field"));
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if (value_type (arg1) != type)
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arg1 = value_cast (type, arg1);
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type = check_typedef (value_type (arg1));
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return value_ind (value_add (arg1, arg2));
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}
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else
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if (TYPE_CODE (type) != TYPE_CODE_ARRAY)
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{
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if (TYPE_NAME (type))
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error (_("cannot subscript something of type `%s'"),
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TYPE_NAME (type));
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else
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error (_("cannot subscript requested type"));
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}
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if (noside == EVAL_AVOID_SIDE_EFFECTS)
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return value_zero (TYPE_TARGET_TYPE (type), VALUE_LVAL (arg1));
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else
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return value_subscript (arg1, arg2);
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default:
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return evaluate_subexp_standard (expect_type, exp, pos, noside);
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}
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nosideret:
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return value_from_longest (builtin_type_long, (LONGEST) 1);
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}
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/* FIXME: This is a copy of c_create_fundamental_type(), before
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all the non-C types were stripped from it. Needs to be fixed
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by an experienced Modula programmer. */
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static struct type *
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m2_create_fundamental_type (struct objfile *objfile, int typeid)
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{
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struct type *type = NULL;
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switch (typeid)
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{
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default:
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/* FIXME: For now, if we are asked to produce a type not in this
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language, create the equivalent of a C integer type with the
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name "<?type?>". When all the dust settles from the type
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reconstruction work, this should probably become an error. */
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type = init_type (TYPE_CODE_INT,
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gdbarch_int_bit (current_gdbarch) / TARGET_CHAR_BIT,
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0, "<?type?>", objfile);
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warning (_("internal error: no Modula fundamental type %d"), typeid);
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break;
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case FT_VOID:
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type = init_type (TYPE_CODE_VOID,
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TARGET_CHAR_BIT / TARGET_CHAR_BIT,
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0, "void", objfile);
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break;
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case FT_BOOLEAN:
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type = init_type (TYPE_CODE_BOOL,
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TARGET_CHAR_BIT / TARGET_CHAR_BIT,
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TYPE_FLAG_UNSIGNED, "boolean", objfile);
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break;
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case FT_STRING:
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type = init_type (TYPE_CODE_STRING,
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TARGET_CHAR_BIT / TARGET_CHAR_BIT,
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0, "string", objfile);
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break;
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case FT_CHAR:
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type = init_type (TYPE_CODE_INT,
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TARGET_CHAR_BIT / TARGET_CHAR_BIT,
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0, "char", objfile);
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break;
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case FT_SIGNED_CHAR:
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type = init_type (TYPE_CODE_INT,
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TARGET_CHAR_BIT / TARGET_CHAR_BIT,
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0, "signed char", objfile);
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break;
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case FT_UNSIGNED_CHAR:
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type = init_type (TYPE_CODE_INT,
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TARGET_CHAR_BIT / TARGET_CHAR_BIT,
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TYPE_FLAG_UNSIGNED, "unsigned char", objfile);
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break;
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case FT_SHORT:
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type = init_type (TYPE_CODE_INT,
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gdbarch_short_bit (current_gdbarch) / TARGET_CHAR_BIT,
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0, "short", objfile);
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break;
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case FT_SIGNED_SHORT:
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type = init_type (TYPE_CODE_INT,
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gdbarch_short_bit (current_gdbarch) / TARGET_CHAR_BIT,
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0, "short", objfile); /* FIXME-fnf */
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break;
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case FT_UNSIGNED_SHORT:
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type = init_type (TYPE_CODE_INT,
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gdbarch_short_bit (current_gdbarch) / TARGET_CHAR_BIT,
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TYPE_FLAG_UNSIGNED, "unsigned short", objfile);
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break;
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case FT_INTEGER:
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type = init_type (TYPE_CODE_INT,
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gdbarch_int_bit (current_gdbarch) / TARGET_CHAR_BIT,
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0, "int", objfile);
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break;
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case FT_SIGNED_INTEGER:
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type = init_type (TYPE_CODE_INT,
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gdbarch_int_bit (current_gdbarch) / TARGET_CHAR_BIT,
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0, "int", objfile); /* FIXME -fnf */
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break;
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case FT_UNSIGNED_INTEGER:
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type = init_type (TYPE_CODE_INT,
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gdbarch_int_bit (current_gdbarch) / TARGET_CHAR_BIT,
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TYPE_FLAG_UNSIGNED, "unsigned int", objfile);
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break;
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case FT_FIXED_DECIMAL:
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type = init_type (TYPE_CODE_INT,
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gdbarch_int_bit (current_gdbarch) / TARGET_CHAR_BIT,
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0, "fixed decimal", objfile);
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break;
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case FT_LONG:
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type = init_type (TYPE_CODE_INT,
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gdbarch_long_bit (current_gdbarch) / TARGET_CHAR_BIT,
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0, "long", objfile);
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break;
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case FT_SIGNED_LONG:
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type = init_type (TYPE_CODE_INT,
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gdbarch_long_bit (current_gdbarch) / TARGET_CHAR_BIT,
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0, "long", objfile); /* FIXME -fnf */
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break;
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case FT_UNSIGNED_LONG:
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type = init_type (TYPE_CODE_INT,
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gdbarch_long_bit (current_gdbarch) / TARGET_CHAR_BIT,
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TYPE_FLAG_UNSIGNED, "unsigned long", objfile);
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break;
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case FT_LONG_LONG:
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type = init_type (TYPE_CODE_INT,
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gdbarch_long_long_bit (current_gdbarch)
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/ TARGET_CHAR_BIT,
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0, "long long", objfile);
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break;
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case FT_SIGNED_LONG_LONG:
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type = init_type (TYPE_CODE_INT,
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gdbarch_long_long_bit (current_gdbarch)
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/ TARGET_CHAR_BIT,
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0, "signed long long", objfile);
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break;
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case FT_UNSIGNED_LONG_LONG:
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type = init_type (TYPE_CODE_INT,
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gdbarch_long_long_bit (current_gdbarch)
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/ TARGET_CHAR_BIT,
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TYPE_FLAG_UNSIGNED, "unsigned long long", objfile);
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break;
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case FT_FLOAT:
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type = init_type (TYPE_CODE_FLT,
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gdbarch_float_bit (current_gdbarch) / TARGET_CHAR_BIT,
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0, "float", objfile);
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break;
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case FT_DBL_PREC_FLOAT:
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type = init_type (TYPE_CODE_FLT,
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gdbarch_double_bit (current_gdbarch) / TARGET_CHAR_BIT,
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0, "double", objfile);
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break;
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case FT_FLOAT_DECIMAL:
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type = init_type (TYPE_CODE_FLT,
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gdbarch_double_bit (current_gdbarch) / TARGET_CHAR_BIT,
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0, "floating decimal", objfile);
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break;
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case FT_EXT_PREC_FLOAT:
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type = init_type (TYPE_CODE_FLT,
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gdbarch_long_double_bit (current_gdbarch)
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/ TARGET_CHAR_BIT,
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0, "long double", objfile);
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break;
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case FT_COMPLEX:
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type = init_type (TYPE_CODE_COMPLEX,
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2 * gdbarch_float_bit (current_gdbarch)
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/ TARGET_CHAR_BIT,
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0, "complex", objfile);
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TYPE_TARGET_TYPE (type)
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= m2_create_fundamental_type (objfile, FT_FLOAT);
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break;
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case FT_DBL_PREC_COMPLEX:
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type = init_type (TYPE_CODE_COMPLEX,
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2 * gdbarch_double_bit (current_gdbarch)
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/ TARGET_CHAR_BIT,
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0, "double complex", objfile);
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TYPE_TARGET_TYPE (type)
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= m2_create_fundamental_type (objfile, FT_DBL_PREC_FLOAT);
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break;
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case FT_EXT_PREC_COMPLEX:
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type = init_type (TYPE_CODE_COMPLEX,
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2 * gdbarch_long_double_bit (current_gdbarch)
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/ TARGET_CHAR_BIT,
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0, "long double complex", objfile);
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TYPE_TARGET_TYPE (type)
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= m2_create_fundamental_type (objfile, FT_EXT_PREC_FLOAT);
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break;
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}
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return (type);
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}
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/* Table of operators and their precedences for printing expressions. */
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static const struct op_print m2_op_print_tab[] =
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{
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{"+", BINOP_ADD, PREC_ADD, 0},
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{"+", UNOP_PLUS, PREC_PREFIX, 0},
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{"-", BINOP_SUB, PREC_ADD, 0},
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{"-", UNOP_NEG, PREC_PREFIX, 0},
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{"*", BINOP_MUL, PREC_MUL, 0},
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{"/", BINOP_DIV, PREC_MUL, 0},
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{"DIV", BINOP_INTDIV, PREC_MUL, 0},
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{"MOD", BINOP_REM, PREC_MUL, 0},
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{":=", BINOP_ASSIGN, PREC_ASSIGN, 1},
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{"OR", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
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{"AND", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
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{"NOT", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
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{"=", BINOP_EQUAL, PREC_EQUAL, 0},
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{"<>", BINOP_NOTEQUAL, PREC_EQUAL, 0},
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{"<=", BINOP_LEQ, PREC_ORDER, 0},
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{">=", BINOP_GEQ, PREC_ORDER, 0},
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{">", BINOP_GTR, PREC_ORDER, 0},
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{"<", BINOP_LESS, PREC_ORDER, 0},
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{"^", UNOP_IND, PREC_PREFIX, 0},
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{"@", BINOP_REPEAT, PREC_REPEAT, 0},
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{"CAP", UNOP_CAP, PREC_BUILTIN_FUNCTION, 0},
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{"CHR", UNOP_CHR, PREC_BUILTIN_FUNCTION, 0},
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{"ORD", UNOP_ORD, PREC_BUILTIN_FUNCTION, 0},
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{"FLOAT", UNOP_FLOAT, PREC_BUILTIN_FUNCTION, 0},
|
||
{"HIGH", UNOP_HIGH, PREC_BUILTIN_FUNCTION, 0},
|
||
{"MAX", UNOP_MAX, PREC_BUILTIN_FUNCTION, 0},
|
||
{"MIN", UNOP_MIN, PREC_BUILTIN_FUNCTION, 0},
|
||
{"ODD", UNOP_ODD, PREC_BUILTIN_FUNCTION, 0},
|
||
{"TRUNC", UNOP_TRUNC, PREC_BUILTIN_FUNCTION, 0},
|
||
{NULL, 0, 0, 0}
|
||
};
|
||
|
||
/* The built-in types of Modula-2. */
|
||
|
||
enum m2_primitive_types {
|
||
m2_primitive_type_char,
|
||
m2_primitive_type_int,
|
||
m2_primitive_type_card,
|
||
m2_primitive_type_real,
|
||
m2_primitive_type_bool,
|
||
nr_m2_primitive_types
|
||
};
|
||
|
||
static void
|
||
m2_language_arch_info (struct gdbarch *gdbarch,
|
||
struct language_arch_info *lai)
|
||
{
|
||
const struct builtin_m2_type *builtin = builtin_m2_type (gdbarch);
|
||
|
||
lai->string_char_type = builtin->builtin_char;
|
||
lai->primitive_type_vector
|
||
= GDBARCH_OBSTACK_CALLOC (gdbarch, nr_m2_primitive_types + 1,
|
||
struct type *);
|
||
|
||
lai->primitive_type_vector [m2_primitive_type_char]
|
||
= builtin->builtin_char;
|
||
lai->primitive_type_vector [m2_primitive_type_int]
|
||
= builtin->builtin_int;
|
||
lai->primitive_type_vector [m2_primitive_type_card]
|
||
= builtin->builtin_card;
|
||
lai->primitive_type_vector [m2_primitive_type_real]
|
||
= builtin->builtin_real;
|
||
lai->primitive_type_vector [m2_primitive_type_bool]
|
||
= builtin->builtin_bool;
|
||
}
|
||
|
||
const struct exp_descriptor exp_descriptor_modula2 =
|
||
{
|
||
print_subexp_standard,
|
||
operator_length_standard,
|
||
op_name_standard,
|
||
dump_subexp_body_standard,
|
||
evaluate_subexp_modula2
|
||
};
|
||
|
||
const struct language_defn m2_language_defn =
|
||
{
|
||
"modula-2",
|
||
language_m2,
|
||
NULL,
|
||
range_check_on,
|
||
type_check_on,
|
||
case_sensitive_on,
|
||
array_row_major,
|
||
&exp_descriptor_modula2,
|
||
m2_parse, /* parser */
|
||
m2_error, /* parser error function */
|
||
null_post_parser,
|
||
m2_printchar, /* Print character constant */
|
||
m2_printstr, /* function to print string constant */
|
||
m2_emit_char, /* Function to print a single character */
|
||
m2_create_fundamental_type, /* Create fundamental type in this language */
|
||
m2_print_type, /* Print a type using appropriate syntax */
|
||
m2_val_print, /* Print a value using appropriate syntax */
|
||
c_value_print, /* Print a top-level value */
|
||
NULL, /* Language specific skip_trampoline */
|
||
value_of_this, /* value_of_this */
|
||
basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
|
||
basic_lookup_transparent_type,/* lookup_transparent_type */
|
||
NULL, /* Language specific symbol demangler */
|
||
NULL, /* Language specific class_name_from_physname */
|
||
m2_op_print_tab, /* expression operators for printing */
|
||
0, /* arrays are first-class (not c-style) */
|
||
0, /* String lower bound */
|
||
NULL,
|
||
default_word_break_characters,
|
||
m2_language_arch_info,
|
||
default_print_array_index,
|
||
default_pass_by_reference,
|
||
LANG_MAGIC
|
||
};
|
||
|
||
static void *
|
||
build_m2_types (struct gdbarch *gdbarch)
|
||
{
|
||
struct builtin_m2_type *builtin_m2_type
|
||
= GDBARCH_OBSTACK_ZALLOC (gdbarch, struct builtin_m2_type);
|
||
|
||
/* Modula-2 "pervasive" types. NOTE: these can be redefined!!! */
|
||
builtin_m2_type->builtin_int =
|
||
init_type (TYPE_CODE_INT,
|
||
gdbarch_int_bit (current_gdbarch) / TARGET_CHAR_BIT,
|
||
0, "INTEGER", (struct objfile *) NULL);
|
||
builtin_m2_type->builtin_card =
|
||
init_type (TYPE_CODE_INT,
|
||
gdbarch_int_bit (current_gdbarch) / TARGET_CHAR_BIT,
|
||
TYPE_FLAG_UNSIGNED,
|
||
"CARDINAL", (struct objfile *) NULL);
|
||
builtin_m2_type->builtin_real =
|
||
init_type (TYPE_CODE_FLT,
|
||
gdbarch_float_bit (current_gdbarch) / TARGET_CHAR_BIT,
|
||
0,
|
||
"REAL", (struct objfile *) NULL);
|
||
builtin_m2_type->builtin_char =
|
||
init_type (TYPE_CODE_CHAR, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
|
||
TYPE_FLAG_UNSIGNED,
|
||
"CHAR", (struct objfile *) NULL);
|
||
builtin_m2_type->builtin_bool =
|
||
init_type (TYPE_CODE_BOOL,
|
||
gdbarch_int_bit (current_gdbarch) / TARGET_CHAR_BIT,
|
||
TYPE_FLAG_UNSIGNED,
|
||
"BOOLEAN", (struct objfile *) NULL);
|
||
|
||
return builtin_m2_type;
|
||
}
|
||
|
||
static struct gdbarch_data *m2_type_data;
|
||
|
||
const struct builtin_m2_type *
|
||
builtin_m2_type (struct gdbarch *gdbarch)
|
||
{
|
||
return gdbarch_data (gdbarch, m2_type_data);
|
||
}
|
||
|
||
|
||
/* Initialization for Modula-2 */
|
||
|
||
void
|
||
_initialize_m2_language (void)
|
||
{
|
||
m2_type_data = gdbarch_data_register_post_init (build_m2_types);
|
||
|
||
add_language (&m2_language_defn);
|
||
}
|