680 lines
19 KiB
C
680 lines
19 KiB
C
/* Chill language support routines for GDB, the GNU debugger.
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Copyright 1992, 1995, 1996, 2000 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 2 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, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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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 "value.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 "ch-lang.h"
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#include "valprint.h"
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extern void _initialize_chill_language PARAMS ((void));
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static value_ptr
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evaluate_subexp_chill PARAMS ((struct type *, struct expression *, int *, enum noside));
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static value_ptr
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value_chill_max_min PARAMS ((enum exp_opcode, value_ptr));
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static value_ptr
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value_chill_card PARAMS ((value_ptr));
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static value_ptr
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value_chill_length PARAMS ((value_ptr));
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static struct type *
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chill_create_fundamental_type PARAMS ((struct objfile *, int));
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static void chill_printstr (struct ui_file * stream, char *string,
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unsigned int length, int width,
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int force_ellipses);
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static void chill_printchar (int, struct ui_file *);
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/* For now, Chill uses a simple mangling algorithm whereby you simply
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discard everything after the occurance of two successive CPLUS_MARKER
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characters to derive the demangled form. */
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char *
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chill_demangle (mangled)
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const char *mangled;
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{
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const char *joiner = NULL;
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char *demangled;
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const char *cp = mangled;
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while (*cp)
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{
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if (is_cplus_marker (*cp))
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{
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joiner = cp;
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break;
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}
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cp++;
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}
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if (joiner != NULL && *(joiner + 1) == *joiner)
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{
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demangled = savestring (mangled, joiner - mangled);
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}
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else
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{
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demangled = NULL;
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}
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return (demangled);
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}
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static void
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chill_printchar (c, stream)
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register int c;
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struct ui_file *stream;
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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 == '^')
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fprintf_filtered (stream, "'%c%c'", c, c);
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else
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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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fprintf_filtered (stream, "'^(%u)'", (unsigned int) c);
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}
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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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Note that gdb maintains the length of strings without counting the
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terminating null byte, while chill strings are typically written with
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an explicit null byte. So we always assume an implied null byte
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until gdb is able to maintain non-null terminated strings as well
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as null terminated strings (FIXME).
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*/
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static void
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chill_printstr (stream, string, length, width, force_ellipses)
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struct ui_file *stream;
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char *string;
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unsigned int length;
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int width;
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int force_ellipses;
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{
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register unsigned int i;
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unsigned int things_printed = 0;
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int in_literal_form = 0;
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int in_control_form = 0;
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int need_slashslash = 0;
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unsigned int c;
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if (length == 0)
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{
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fputs_filtered ("\"\"", stream);
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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_slashslash)
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{
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fputs_filtered ("//", stream);
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need_slashslash = 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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c = string[i];
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if (reps > repeat_count_threshold)
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{
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if (in_control_form || in_literal_form)
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{
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if (in_control_form)
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fputs_filtered (")", stream);
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fputs_filtered ("\"//", stream);
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in_control_form = in_literal_form = 0;
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}
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chill_printchar (c, 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_slashslash = 1;
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}
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else
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{
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if (!in_literal_form && !in_control_form)
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fputs_filtered ("\"", stream);
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if (PRINT_LITERAL_FORM (c))
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{
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if (!in_literal_form)
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{
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if (in_control_form)
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{
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fputs_filtered (")", stream);
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in_control_form = 0;
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}
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in_literal_form = 1;
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}
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fprintf_filtered (stream, "%c", c);
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if (c == '"' || c == '^')
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/* duplicate this one as must be done at input */
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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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if (!in_control_form)
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{
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if (in_literal_form)
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{
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in_literal_form = 0;
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}
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fputs_filtered ("^(", stream);
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in_control_form = 1;
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}
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else
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fprintf_filtered (stream, ",");
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c = c & 0xff;
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fprintf_filtered (stream, "%u", (unsigned int) c);
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}
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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_control_form)
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{
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fputs_filtered (")", stream);
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}
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if (in_literal_form || in_control_form)
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{
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fputs_filtered ("\"", stream);
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}
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if (force_ellipses || (i < length))
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{
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fputs_filtered ("...", stream);
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}
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}
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static struct type *
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chill_create_fundamental_type (objfile, typeid)
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struct objfile *objfile;
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int typeid;
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{
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register 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, 2, 0, "<?type?>", objfile);
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warning ("internal error: no chill fundamental type %d", typeid);
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break;
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case FT_VOID:
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/* FIXME: Currently the GNU Chill compiler emits some DWARF entries for
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typedefs, unrelated to anything directly in the code being compiled,
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that have some FT_VOID types. Just fake it for now. */
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type = init_type (TYPE_CODE_VOID, 0, 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, 1, TYPE_FLAG_UNSIGNED, "BOOL", objfile);
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break;
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case FT_CHAR:
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type = init_type (TYPE_CODE_CHAR, 1, TYPE_FLAG_UNSIGNED, "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, 1, 0, "BYTE", objfile);
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break;
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case FT_UNSIGNED_CHAR:
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type = init_type (TYPE_CODE_INT, 1, TYPE_FLAG_UNSIGNED, "UBYTE", objfile);
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break;
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case FT_SHORT: /* Chill ints are 2 bytes */
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type = init_type (TYPE_CODE_INT, 2, 0, "INT", objfile);
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break;
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case FT_UNSIGNED_SHORT: /* Chill ints are 2 bytes */
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type = init_type (TYPE_CODE_INT, 2, TYPE_FLAG_UNSIGNED, "UINT", objfile);
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break;
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case FT_INTEGER: /* FIXME? */
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case FT_SIGNED_INTEGER: /* FIXME? */
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case FT_LONG: /* Chill longs are 4 bytes */
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case FT_SIGNED_LONG: /* Chill longs are 4 bytes */
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type = init_type (TYPE_CODE_INT, 4, 0, "LONG", objfile);
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break;
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case FT_UNSIGNED_INTEGER: /* FIXME? */
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case FT_UNSIGNED_LONG: /* Chill longs are 4 bytes */
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type = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED, "ULONG", objfile);
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break;
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case FT_FLOAT:
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type = init_type (TYPE_CODE_FLT, 4, 0, "REAL", 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, 8, 0, "LONG_REAL", objfile);
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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 chill_op_print_tab[] =
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{
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{"AND", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
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{"OR", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
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{"NOT", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
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{"MOD", BINOP_MOD, PREC_MUL, 0},
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{"REM", BINOP_REM, PREC_MUL, 0},
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{"SIZE", UNOP_SIZEOF, PREC_BUILTIN_FUNCTION, 0},
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{"LOWER", UNOP_LOWER, PREC_BUILTIN_FUNCTION, 0},
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{"UPPER", UNOP_UPPER, PREC_BUILTIN_FUNCTION, 0},
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{"CARD", UNOP_CARD, PREC_BUILTIN_FUNCTION, 0},
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{"MAX", UNOP_CHMAX, PREC_BUILTIN_FUNCTION, 0},
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{"MIN", UNOP_CHMIN, PREC_BUILTIN_FUNCTION, 0},
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{":=", BINOP_ASSIGN, PREC_ASSIGN, 1},
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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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{"+", BINOP_ADD, PREC_ADD, 0},
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{"-", BINOP_SUB, PREC_ADD, 0},
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{"*", BINOP_MUL, PREC_MUL, 0},
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{"/", BINOP_DIV, PREC_MUL, 0},
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{"//", BINOP_CONCAT, PREC_PREFIX, 0}, /* FIXME: precedence? */
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{"-", UNOP_NEG, PREC_PREFIX, 0},
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{"->", UNOP_IND, PREC_SUFFIX, 1},
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{"->", UNOP_ADDR, PREC_PREFIX, 0},
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{":", BINOP_RANGE, PREC_ASSIGN, 0},
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{NULL, 0, 0, 0}
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};
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/* The built-in types of Chill. */
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struct type *builtin_type_chill_bool;
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struct type *builtin_type_chill_char;
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struct type *builtin_type_chill_long;
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struct type *builtin_type_chill_ulong;
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struct type *builtin_type_chill_real;
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struct type **CONST_PTR (chill_builtin_types[]) =
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{
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&builtin_type_chill_bool,
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&builtin_type_chill_char,
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&builtin_type_chill_long,
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&builtin_type_chill_ulong,
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&builtin_type_chill_real,
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0
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};
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/* Calculate LOWER or UPPER of TYPE.
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Returns the result as an integer.
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*RESULT_TYPE is the appropriate type for the result. */
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LONGEST
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type_lower_upper (op, type, result_type)
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enum exp_opcode op; /* Either UNOP_LOWER or UNOP_UPPER */
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struct type *type;
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struct type **result_type;
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{
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LONGEST low, high;
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*result_type = type;
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CHECK_TYPEDEF (type);
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switch (TYPE_CODE (type))
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{
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case TYPE_CODE_STRUCT:
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*result_type = builtin_type_int;
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if (chill_varying_type (type))
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return type_lower_upper (op, TYPE_FIELD_TYPE (type, 1), result_type);
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break;
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case TYPE_CODE_ARRAY:
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case TYPE_CODE_BITSTRING:
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case TYPE_CODE_STRING:
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type = TYPE_FIELD_TYPE (type, 0); /* Get index type */
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/* ... fall through ... */
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case TYPE_CODE_RANGE:
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*result_type = TYPE_TARGET_TYPE (type);
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return op == UNOP_LOWER ? TYPE_LOW_BOUND (type) : TYPE_HIGH_BOUND (type);
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case TYPE_CODE_ENUM:
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case TYPE_CODE_BOOL:
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case TYPE_CODE_INT:
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case TYPE_CODE_CHAR:
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if (get_discrete_bounds (type, &low, &high) >= 0)
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{
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*result_type = type;
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return op == UNOP_LOWER ? low : high;
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}
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break;
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case TYPE_CODE_UNDEF:
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case TYPE_CODE_PTR:
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case TYPE_CODE_UNION:
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case TYPE_CODE_FUNC:
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case TYPE_CODE_FLT:
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case TYPE_CODE_VOID:
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case TYPE_CODE_SET:
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case TYPE_CODE_ERROR:
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case TYPE_CODE_MEMBER:
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case TYPE_CODE_METHOD:
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case TYPE_CODE_REF:
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case TYPE_CODE_COMPLEX:
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default:
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break;
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}
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error ("unknown mode for LOWER/UPPER builtin");
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}
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static value_ptr
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value_chill_length (val)
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value_ptr val;
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{
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LONGEST tmp;
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struct type *type = VALUE_TYPE (val);
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struct type *ttype;
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CHECK_TYPEDEF (type);
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switch (TYPE_CODE (type))
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{
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case TYPE_CODE_ARRAY:
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case TYPE_CODE_BITSTRING:
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case TYPE_CODE_STRING:
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tmp = type_lower_upper (UNOP_UPPER, type, &ttype)
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- type_lower_upper (UNOP_LOWER, type, &ttype) + 1;
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break;
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case TYPE_CODE_STRUCT:
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if (chill_varying_type (type))
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{
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tmp = unpack_long (TYPE_FIELD_TYPE (type, 0), VALUE_CONTENTS (val));
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break;
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}
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/* ... else fall through ... */
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default:
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error ("bad argument to LENGTH builtin");
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}
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return value_from_longest (builtin_type_int, tmp);
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}
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static value_ptr
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value_chill_card (val)
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value_ptr val;
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{
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LONGEST tmp = 0;
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struct type *type = VALUE_TYPE (val);
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CHECK_TYPEDEF (type);
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if (TYPE_CODE (type) == TYPE_CODE_SET)
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{
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struct type *range_type = TYPE_INDEX_TYPE (type);
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LONGEST lower_bound, upper_bound;
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int i;
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get_discrete_bounds (range_type, &lower_bound, &upper_bound);
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for (i = lower_bound; i <= upper_bound; i++)
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if (value_bit_index (type, VALUE_CONTENTS (val), i) > 0)
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tmp++;
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}
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else
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error ("bad argument to CARD builtin");
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return value_from_longest (builtin_type_int, tmp);
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}
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static value_ptr
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value_chill_max_min (op, val)
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enum exp_opcode op;
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value_ptr val;
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{
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LONGEST tmp = 0;
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struct type *type = VALUE_TYPE (val);
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struct type *elttype;
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CHECK_TYPEDEF (type);
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if (TYPE_CODE (type) == TYPE_CODE_SET)
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{
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LONGEST lower_bound, upper_bound;
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int i, empty = 1;
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elttype = TYPE_INDEX_TYPE (type);
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CHECK_TYPEDEF (elttype);
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get_discrete_bounds (elttype, &lower_bound, &upper_bound);
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if (op == UNOP_CHMAX)
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{
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for (i = upper_bound; i >= lower_bound; i--)
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{
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if (value_bit_index (type, VALUE_CONTENTS (val), i) > 0)
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{
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tmp = i;
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empty = 0;
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break;
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}
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}
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}
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else
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{
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for (i = lower_bound; i <= upper_bound; i++)
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{
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if (value_bit_index (type, VALUE_CONTENTS (val), i) > 0)
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{
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tmp = i;
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empty = 0;
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break;
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}
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}
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}
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if (empty)
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error ("%s for empty powerset", op == UNOP_CHMAX ? "MAX" : "MIN");
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}
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else
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error ("bad argument to %s builtin", op == UNOP_CHMAX ? "MAX" : "MIN");
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return value_from_longest (TYPE_CODE (elttype) == TYPE_CODE_RANGE
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? TYPE_TARGET_TYPE (elttype)
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: elttype,
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tmp);
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}
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static value_ptr
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evaluate_subexp_chill (expect_type, exp, pos, noside)
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struct type *expect_type;
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register struct expression *exp;
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register int *pos;
|
||
enum noside noside;
|
||
{
|
||
int pc = *pos;
|
||
struct type *type;
|
||
int tem, nargs;
|
||
value_ptr arg1;
|
||
value_ptr *argvec;
|
||
enum exp_opcode op = exp->elts[*pos].opcode;
|
||
switch (op)
|
||
{
|
||
case MULTI_SUBSCRIPT:
|
||
if (noside == EVAL_SKIP)
|
||
break;
|
||
(*pos) += 3;
|
||
nargs = longest_to_int (exp->elts[pc + 1].longconst);
|
||
arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
|
||
type = check_typedef (VALUE_TYPE (arg1));
|
||
|
||
if (nargs == 1 && TYPE_CODE (type) == TYPE_CODE_INT)
|
||
{
|
||
/* Looks like string repetition. */
|
||
value_ptr string = evaluate_subexp_with_coercion (exp, pos, noside);
|
||
return value_concat (arg1, string);
|
||
}
|
||
|
||
switch (TYPE_CODE (type))
|
||
{
|
||
case TYPE_CODE_PTR:
|
||
type = check_typedef (TYPE_TARGET_TYPE (type));
|
||
if (!type || TYPE_CODE (type) != TYPE_CODE_FUNC)
|
||
error ("reference value used as function");
|
||
/* ... fall through ... */
|
||
case TYPE_CODE_FUNC:
|
||
/* It's a function call. */
|
||
if (noside == EVAL_AVOID_SIDE_EFFECTS)
|
||
break;
|
||
|
||
/* Allocate arg vector, including space for the function to be
|
||
called in argvec[0] and a terminating NULL */
|
||
argvec = (value_ptr *) alloca (sizeof (value_ptr) * (nargs + 2));
|
||
argvec[0] = arg1;
|
||
tem = 1;
|
||
for (; tem <= nargs && tem <= TYPE_NFIELDS (type); tem++)
|
||
{
|
||
argvec[tem]
|
||
= evaluate_subexp_chill (TYPE_FIELD_TYPE (type, tem - 1),
|
||
exp, pos, noside);
|
||
}
|
||
for (; tem <= nargs; tem++)
|
||
argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
|
||
argvec[tem] = 0; /* signal end of arglist */
|
||
|
||
return call_function_by_hand (argvec[0], nargs, argvec + 1);
|
||
default:
|
||
break;
|
||
}
|
||
|
||
while (nargs-- > 0)
|
||
{
|
||
value_ptr index = evaluate_subexp_with_coercion (exp, pos, noside);
|
||
arg1 = value_subscript (arg1, index);
|
||
}
|
||
return (arg1);
|
||
|
||
case UNOP_LOWER:
|
||
case UNOP_UPPER:
|
||
(*pos)++;
|
||
if (noside == EVAL_SKIP)
|
||
{
|
||
(*exp->language_defn->evaluate_exp) (NULL_TYPE, exp, pos, EVAL_SKIP);
|
||
goto nosideret;
|
||
}
|
||
arg1 = (*exp->language_defn->evaluate_exp) (NULL_TYPE, exp, pos,
|
||
EVAL_AVOID_SIDE_EFFECTS);
|
||
tem = type_lower_upper (op, VALUE_TYPE (arg1), &type);
|
||
return value_from_longest (type, tem);
|
||
|
||
case UNOP_LENGTH:
|
||
(*pos)++;
|
||
arg1 = (*exp->language_defn->evaluate_exp) (NULL_TYPE, exp, pos, noside);
|
||
return value_chill_length (arg1);
|
||
|
||
case UNOP_CARD:
|
||
(*pos)++;
|
||
arg1 = (*exp->language_defn->evaluate_exp) (NULL_TYPE, exp, pos, noside);
|
||
return value_chill_card (arg1);
|
||
|
||
case UNOP_CHMAX:
|
||
case UNOP_CHMIN:
|
||
(*pos)++;
|
||
arg1 = (*exp->language_defn->evaluate_exp) (NULL_TYPE, exp, pos, noside);
|
||
return value_chill_max_min (op, arg1);
|
||
|
||
case BINOP_COMMA:
|
||
error ("',' operator used in invalid context");
|
||
|
||
default:
|
||
break;
|
||
}
|
||
|
||
return evaluate_subexp_standard (expect_type, exp, pos, noside);
|
||
nosideret:
|
||
return value_from_longest (builtin_type_long, (LONGEST) 1);
|
||
}
|
||
|
||
const struct language_defn chill_language_defn =
|
||
{
|
||
"chill",
|
||
language_chill,
|
||
chill_builtin_types,
|
||
range_check_on,
|
||
type_check_on,
|
||
chill_parse, /* parser */
|
||
chill_error, /* parser error function */
|
||
evaluate_subexp_chill,
|
||
chill_printchar, /* print a character constant */
|
||
chill_printstr, /* function to print a string constant */
|
||
NULL, /* Function to print a single char */
|
||
chill_create_fundamental_type, /* Create fundamental type in this language */
|
||
chill_print_type, /* Print a type using appropriate syntax */
|
||
chill_val_print, /* Print a value using appropriate syntax */
|
||
chill_value_print, /* Print a top-levl value */
|
||
{"", "B'", "", ""}, /* Binary format info */
|
||
{"O'%lo", "O'", "o", ""}, /* Octal format info */
|
||
{"D'%ld", "D'", "d", ""}, /* Decimal format info */
|
||
{"H'%lx", "H'", "x", ""}, /* Hex format info */
|
||
chill_op_print_tab, /* expression operators for printing */
|
||
0, /* arrays are first-class (not c-style) */
|
||
0, /* String lower bound */
|
||
&builtin_type_chill_char, /* Type of string elements */
|
||
LANG_MAGIC
|
||
};
|
||
|
||
/* Initialization for Chill */
|
||
|
||
void
|
||
_initialize_chill_language ()
|
||
{
|
||
builtin_type_chill_bool =
|
||
init_type (TYPE_CODE_BOOL, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
|
||
TYPE_FLAG_UNSIGNED,
|
||
"BOOL", (struct objfile *) NULL);
|
||
builtin_type_chill_char =
|
||
init_type (TYPE_CODE_CHAR, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
|
||
TYPE_FLAG_UNSIGNED,
|
||
"CHAR", (struct objfile *) NULL);
|
||
builtin_type_chill_long =
|
||
init_type (TYPE_CODE_INT, TARGET_LONG_BIT / TARGET_CHAR_BIT,
|
||
0,
|
||
"LONG", (struct objfile *) NULL);
|
||
builtin_type_chill_ulong =
|
||
init_type (TYPE_CODE_INT, TARGET_LONG_BIT / TARGET_CHAR_BIT,
|
||
TYPE_FLAG_UNSIGNED,
|
||
"ULONG", (struct objfile *) NULL);
|
||
builtin_type_chill_real =
|
||
init_type (TYPE_CODE_FLT, TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
|
||
0,
|
||
"LONG_REAL", (struct objfile *) NULL);
|
||
|
||
add_language (&chill_language_defn);
|
||
}
|