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22e39759 FF |
1 | /* Chill language support routines for GDB, the GNU debugger. |
2 | Copyright 1992 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GDB. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | #include "defs.h" | |
21 | #include "symtab.h" | |
22 | #include "gdbtypes.h" | |
7398958c | 23 | #include "value.h" |
22e39759 FF |
24 | #include "expression.h" |
25 | #include "parser-defs.h" | |
26 | #include "language.h" | |
27 | #include "ch-lang.h" | |
28 | ||
7532cf10 FF |
29 | |
30 | /* For now, Chill uses a simple mangling algorithm whereby you simply | |
31 | discard everything after the occurance of two successive CPLUS_MARKER | |
32 | characters to derive the demangled form. */ | |
33 | ||
34 | char * | |
35 | chill_demangle (mangled) | |
36 | const char *mangled; | |
37 | { | |
38 | char *joiner; | |
39 | char *demangled; | |
40 | ||
41 | joiner = strchr (mangled, CPLUS_MARKER); | |
42 | if (joiner != NULL && *(joiner + 1) == CPLUS_MARKER) | |
43 | { | |
44 | demangled = savestring (mangled, joiner - mangled); | |
45 | } | |
46 | else | |
47 | { | |
48 | demangled = NULL; | |
49 | } | |
50 | return (demangled); | |
51 | } | |
52 | ||
22e39759 FF |
53 | static void |
54 | chill_printchar (c, stream) | |
55 | register int c; | |
199b2450 | 56 | GDB_FILE *stream; |
22e39759 FF |
57 | { |
58 | c &= 0xFF; /* Avoid sign bit follies */ | |
59 | ||
60 | if (PRINT_LITERAL_FORM (c)) | |
61 | { | |
62 | fprintf_filtered (stream, "'%c'", c); | |
63 | } | |
64 | else | |
65 | { | |
66 | fprintf_filtered (stream, "C'%.2x'", (unsigned int) c); | |
67 | } | |
68 | } | |
69 | ||
70 | /* Print the character string STRING, printing at most LENGTH characters. | |
71 | Printing stops early if the number hits print_max; repeat counts | |
72 | are printed as appropriate. Print ellipses at the end if we | |
73 | had to stop before printing LENGTH characters, or if FORCE_ELLIPSES. | |
74 | Note that gdb maintains the length of strings without counting the | |
75 | terminating null byte, while chill strings are typically written with | |
76 | an explicit null byte. So we always assume an implied null byte | |
77 | until gdb is able to maintain non-null terminated strings as well | |
78 | as null terminated strings (FIXME). | |
79 | */ | |
80 | ||
81 | static void | |
82 | chill_printstr (stream, string, length, force_ellipses) | |
199b2450 | 83 | GDB_FILE *stream; |
22e39759 FF |
84 | char *string; |
85 | unsigned int length; | |
86 | int force_ellipses; | |
87 | { | |
88 | register unsigned int i; | |
89 | unsigned int things_printed = 0; | |
90 | int in_literal_form = 0; | |
91 | int in_control_form = 0; | |
92 | int need_slashslash = 0; | |
93 | unsigned int c; | |
94 | extern int repeat_count_threshold; | |
95 | extern int print_max; | |
96 | ||
97 | if (length == 0) | |
98 | { | |
96b6b765 | 99 | fputs_filtered ("\"\"", stream); |
22e39759 FF |
100 | return; |
101 | } | |
102 | ||
103 | for (i = 0; i < length && things_printed < print_max; ++i) | |
104 | { | |
105 | /* Position of the character we are examining | |
106 | to see whether it is repeated. */ | |
107 | unsigned int rep1; | |
108 | /* Number of repetitions we have detected so far. */ | |
109 | unsigned int reps; | |
110 | ||
111 | QUIT; | |
112 | ||
113 | if (need_slashslash) | |
114 | { | |
115 | fputs_filtered ("//", stream); | |
116 | need_slashslash = 0; | |
117 | } | |
118 | ||
119 | rep1 = i + 1; | |
120 | reps = 1; | |
121 | while (rep1 < length && string[rep1] == string[i]) | |
122 | { | |
123 | ++rep1; | |
124 | ++reps; | |
125 | } | |
126 | ||
127 | c = string[i]; | |
128 | if (reps > repeat_count_threshold) | |
129 | { | |
130 | if (in_control_form || in_literal_form) | |
131 | { | |
cba00921 | 132 | fputs_filtered ("\"//", stream); |
22e39759 FF |
133 | in_control_form = in_literal_form = 0; |
134 | } | |
135 | chill_printchar (c, stream); | |
136 | fprintf_filtered (stream, "<repeats %u times>", reps); | |
137 | i = rep1 - 1; | |
138 | things_printed += repeat_count_threshold; | |
139 | need_slashslash = 1; | |
140 | } | |
141 | else | |
142 | { | |
143 | if (PRINT_LITERAL_FORM (c)) | |
144 | { | |
145 | if (!in_literal_form) | |
146 | { | |
147 | if (in_control_form) | |
148 | { | |
cba00921 | 149 | fputs_filtered ("\"//", stream); |
22e39759 FF |
150 | in_control_form = 0; |
151 | } | |
cba00921 | 152 | fputs_filtered ("\"", stream); |
22e39759 FF |
153 | in_literal_form = 1; |
154 | } | |
155 | fprintf_filtered (stream, "%c", c); | |
156 | } | |
157 | else | |
158 | { | |
159 | if (!in_control_form) | |
160 | { | |
161 | if (in_literal_form) | |
162 | { | |
cba00921 | 163 | fputs_filtered ("\"//", stream); |
22e39759 FF |
164 | in_literal_form = 0; |
165 | } | |
cba00921 | 166 | fputs_filtered ("c\"", stream); |
22e39759 FF |
167 | in_control_form = 1; |
168 | } | |
169 | fprintf_filtered (stream, "%.2x", c); | |
170 | } | |
171 | ++things_printed; | |
172 | } | |
173 | } | |
174 | ||
175 | /* Terminate the quotes if necessary. */ | |
176 | if (in_literal_form || in_control_form) | |
177 | { | |
cba00921 | 178 | fputs_filtered ("\"", stream); |
22e39759 FF |
179 | } |
180 | if (force_ellipses || (i < length)) | |
181 | { | |
182 | fputs_filtered ("...", stream); | |
183 | } | |
184 | } | |
185 | ||
186 | static struct type * | |
187 | chill_create_fundamental_type (objfile, typeid) | |
188 | struct objfile *objfile; | |
189 | int typeid; | |
190 | { | |
191 | register struct type *type = NULL; | |
22e39759 FF |
192 | |
193 | switch (typeid) | |
194 | { | |
195 | default: | |
196 | /* FIXME: For now, if we are asked to produce a type not in this | |
197 | language, create the equivalent of a C integer type with the | |
198 | name "<?type?>". When all the dust settles from the type | |
199 | reconstruction work, this should probably become an error. */ | |
a8a69e63 | 200 | type = init_type (TYPE_CODE_INT, 2, 0, "<?type?>", objfile); |
22e39759 FF |
201 | warning ("internal error: no chill fundamental type %d", typeid); |
202 | break; | |
a8a69e63 FF |
203 | case FT_VOID: |
204 | /* FIXME: Currently the GNU Chill compiler emits some DWARF entries for | |
205 | typedefs, unrelated to anything directly in the code being compiled, | |
206 | that have some FT_VOID types. Just fake it for now. */ | |
207 | type = init_type (TYPE_CODE_VOID, 0, 0, "<?VOID?>", objfile); | |
208 | break; | |
22e39759 FF |
209 | case FT_BOOLEAN: |
210 | type = init_type (TYPE_CODE_BOOL, 1, TYPE_FLAG_UNSIGNED, "BOOL", objfile); | |
211 | break; | |
212 | case FT_CHAR: | |
a8a69e63 | 213 | type = init_type (TYPE_CODE_CHAR, 1, TYPE_FLAG_UNSIGNED, "CHAR", objfile); |
22e39759 FF |
214 | break; |
215 | case FT_SIGNED_CHAR: | |
dda398c3 | 216 | type = init_type (TYPE_CODE_INT, 1, 0, "BYTE", objfile); |
22e39759 FF |
217 | break; |
218 | case FT_UNSIGNED_CHAR: | |
219 | type = init_type (TYPE_CODE_INT, 1, TYPE_FLAG_UNSIGNED, "UBYTE", objfile); | |
220 | break; | |
221 | case FT_SHORT: /* Chill ints are 2 bytes */ | |
dda398c3 | 222 | type = init_type (TYPE_CODE_INT, 2, 0, "INT", objfile); |
22e39759 FF |
223 | break; |
224 | case FT_UNSIGNED_SHORT: /* Chill ints are 2 bytes */ | |
225 | type = init_type (TYPE_CODE_INT, 2, TYPE_FLAG_UNSIGNED, "UINT", objfile); | |
226 | break; | |
b6236d6e FF |
227 | case FT_INTEGER: /* FIXME? */ |
228 | case FT_SIGNED_INTEGER: /* FIXME? */ | |
229 | case FT_LONG: /* Chill longs are 4 bytes */ | |
230 | case FT_SIGNED_LONG: /* Chill longs are 4 bytes */ | |
dda398c3 | 231 | type = init_type (TYPE_CODE_INT, 4, 0, "LONG", objfile); |
22e39759 | 232 | break; |
b6236d6e FF |
233 | case FT_UNSIGNED_INTEGER: /* FIXME? */ |
234 | case FT_UNSIGNED_LONG: /* Chill longs are 4 bytes */ | |
22e39759 FF |
235 | type = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED, "ULONG", objfile); |
236 | break; | |
237 | case FT_FLOAT: | |
238 | type = init_type (TYPE_CODE_FLT, 4, 0, "REAL", objfile); | |
239 | break; | |
240 | case FT_DBL_PREC_FLOAT: | |
241 | type = init_type (TYPE_CODE_FLT, 8, 0, "LONG_REAL", objfile); | |
242 | break; | |
243 | } | |
244 | return (type); | |
245 | } | |
246 | ||
247 | \f | |
248 | /* Table of operators and their precedences for printing expressions. */ | |
249 | ||
a8a69e63 | 250 | static const struct op_print chill_op_print_tab[] = { |
22e39759 FF |
251 | {"AND", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0}, |
252 | {"OR", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0}, | |
253 | {"NOT", UNOP_LOGICAL_NOT, PREC_PREFIX, 0}, | |
76a0ffb4 FF |
254 | {"MOD", BINOP_MOD, PREC_MUL, 0}, |
255 | {"REM", BINOP_REM, PREC_MUL, 0}, | |
61379835 PB |
256 | {"SIZE",UNOP_SIZEOF, PREC_BUILTIN_FUNCTION, 0}, |
257 | {"LOWER",UNOP_LOWER, PREC_BUILTIN_FUNCTION, 0}, | |
258 | {"UPPER",UNOP_UPPER, PREC_BUILTIN_FUNCTION, 0}, | |
259 | {"LOWER",UNOP_UPPER, PREC_BUILTIN_FUNCTION, 0}, | |
22e39759 FF |
260 | {":=", BINOP_ASSIGN, PREC_ASSIGN, 1}, |
261 | {"=", BINOP_EQUAL, PREC_EQUAL, 0}, | |
262 | {"/=", BINOP_NOTEQUAL, PREC_EQUAL, 0}, | |
263 | {"<=", BINOP_LEQ, PREC_ORDER, 0}, | |
264 | {">=", BINOP_GEQ, PREC_ORDER, 0}, | |
265 | {">", BINOP_GTR, PREC_ORDER, 0}, | |
266 | {"<", BINOP_LESS, PREC_ORDER, 0}, | |
267 | {"+", BINOP_ADD, PREC_ADD, 0}, | |
268 | {"-", BINOP_SUB, PREC_ADD, 0}, | |
269 | {"*", BINOP_MUL, PREC_MUL, 0}, | |
270 | {"/", BINOP_DIV, PREC_MUL, 0}, | |
fcbadaee | 271 | {"//", BINOP_CONCAT, PREC_PREFIX, 0}, /* FIXME: precedence? */ |
22e39759 | 272 | {"-", UNOP_NEG, PREC_PREFIX, 0}, |
bdef6b60 PB |
273 | {"->", UNOP_IND, PREC_SUFFIX, 1}, |
274 | {"->", UNOP_ADDR, PREC_PREFIX, 0}, | |
22e39759 FF |
275 | {NULL, 0, 0, 0} |
276 | }; | |
22e39759 FF |
277 | \f |
278 | /* The built-in types of Chill. */ | |
279 | ||
280 | struct type *builtin_type_chill_bool; | |
281 | struct type *builtin_type_chill_char; | |
282 | struct type *builtin_type_chill_long; | |
283 | struct type *builtin_type_chill_ulong; | |
284 | struct type *builtin_type_chill_real; | |
285 | ||
286 | struct type ** const (chill_builtin_types[]) = | |
287 | { | |
288 | &builtin_type_chill_bool, | |
289 | &builtin_type_chill_char, | |
290 | &builtin_type_chill_long, | |
291 | &builtin_type_chill_ulong, | |
292 | &builtin_type_chill_real, | |
293 | 0 | |
294 | }; | |
295 | ||
61379835 PB |
296 | /* Calculate LOWER or UPPER of TYPE. |
297 | Returns the result as an integer. | |
298 | *RESULT_TYPE is the appropriate type for the result. */ | |
299 | ||
300 | LONGEST | |
301 | type_lower_upper (op, type, result_type) | |
302 | enum exp_opcode op; /* Either UNOP_LOWER or UNOP_UPPER */ | |
303 | struct type *type; | |
304 | struct type **result_type; | |
305 | { | |
306 | LONGEST tmp; | |
307 | *result_type = builtin_type_int; | |
308 | retry: | |
309 | switch (TYPE_CODE (type)) | |
310 | { | |
311 | case TYPE_CODE_STRUCT: | |
312 | if (chill_varying_type (type)) | |
313 | return type_lower_upper (op, TYPE_FIELD_TYPE (type, 1), result_type); | |
314 | break; | |
315 | case TYPE_CODE_ARRAY: | |
316 | case TYPE_CODE_BITSTRING: | |
317 | case TYPE_CODE_STRING: | |
318 | type = TYPE_FIELD_TYPE (type, 0); /* Get index type */ | |
319 | ||
320 | /* ... fall through ... */ | |
321 | case TYPE_CODE_RANGE: | |
322 | if (TYPE_DUMMY_RANGE (type) > 0) | |
323 | return type_lower_upper (op, TYPE_TARGET_TYPE (type), result_type); | |
324 | *result_type = TYPE_TARGET_TYPE (type); | |
325 | return op == UNOP_LOWER ? TYPE_LOW_BOUND (type) : TYPE_HIGH_BOUND (type); | |
326 | ||
327 | case TYPE_CODE_ENUM: | |
328 | *result_type = type; | |
329 | if (TYPE_NFIELDS (type) > 0) | |
330 | return TYPE_FIELD_BITPOS (type, | |
331 | op == UNOP_LOWER ? 0 | |
332 | : TYPE_NFIELDS (type) - 1); | |
333 | ||
334 | case TYPE_CODE_BOOL: | |
335 | *result_type = type; | |
336 | return op == UNOP_LOWER ? 0 : 1; | |
337 | case TYPE_CODE_INT: | |
338 | case TYPE_CODE_CHAR: | |
339 | *result_type = type; | |
340 | tmp = (LONGEST) 1 << (TARGET_CHAR_BIT * TYPE_LENGTH (type)); | |
341 | if (TYPE_UNSIGNED (type)) | |
342 | return op == UNOP_LOWER ? 0 : tmp - (LONGEST) 1; | |
343 | tmp = tmp >> 1; | |
344 | return op == UNOP_LOWER ? -tmp : (tmp - 1); | |
345 | } | |
346 | error ("unknown mode for LOWER/UPPER builtin"); | |
347 | } | |
348 | ||
349 | static value_ptr | |
350 | value_chill_length (val) | |
351 | value_ptr val; | |
352 | { | |
353 | LONGEST tmp; | |
354 | struct type *type = VALUE_TYPE (val); | |
355 | struct type *ttype; | |
356 | switch (TYPE_CODE (type)) | |
357 | { | |
358 | case TYPE_CODE_ARRAY: | |
359 | case TYPE_CODE_BITSTRING: | |
360 | case TYPE_CODE_STRING: | |
361 | tmp = type_lower_upper (UNOP_UPPER, type, &ttype) | |
362 | - type_lower_upper (UNOP_LOWER, type, &ttype) + 1; | |
363 | break; | |
364 | case TYPE_CODE_STRUCT: | |
365 | if (chill_varying_type (type)) | |
366 | { | |
367 | tmp = unpack_long (TYPE_FIELD_TYPE (type, 0), VALUE_CONTENTS (val)); | |
368 | break; | |
369 | } | |
370 | /* ... else fall through ... */ | |
371 | default: | |
372 | error ("bad argument to LENGTH builtin"); | |
373 | } | |
374 | return value_from_longest (builtin_type_int, tmp); | |
375 | } | |
376 | ||
7398958c PB |
377 | static value_ptr |
378 | evaluate_subexp_chill (expect_type, exp, pos, noside) | |
379 | struct type *expect_type; | |
380 | register struct expression *exp; | |
381 | register int *pos; | |
382 | enum noside noside; | |
383 | { | |
384 | int pc = *pos; | |
61379835 | 385 | struct type *type; |
7398958c PB |
386 | int tem, nargs; |
387 | value_ptr arg1; | |
388 | value_ptr *argvec; | |
61379835 PB |
389 | enum exp_opcode op = exp->elts[*pos].opcode; |
390 | switch (op) | |
7398958c PB |
391 | { |
392 | case MULTI_SUBSCRIPT: | |
393 | if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS) | |
394 | break; | |
395 | (*pos) += 3; | |
396 | nargs = longest_to_int (exp->elts[pc + 1].longconst); | |
397 | arg1 = evaluate_subexp_with_coercion (exp, pos, noside); | |
398 | ||
399 | switch (TYPE_CODE (VALUE_TYPE (arg1))) | |
400 | { | |
401 | case TYPE_CODE_PTR: | |
402 | case TYPE_CODE_FUNC: | |
403 | /* It's a function call. */ | |
404 | /* Allocate arg vector, including space for the function to be | |
405 | called in argvec[0] and a terminating NULL */ | |
406 | argvec = (value_ptr *) alloca (sizeof (value_ptr) * (nargs + 2)); | |
407 | argvec[0] = arg1; | |
408 | tem = 1; | |
409 | for (; tem <= nargs; tem++) | |
410 | argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside); | |
411 | argvec[tem] = 0; /* signal end of arglist */ | |
412 | ||
413 | return call_function_by_hand (argvec[0], nargs, argvec + 1); | |
18d3d859 JK |
414 | default: |
415 | break; | |
7398958c PB |
416 | } |
417 | ||
418 | while (nargs-- > 0) | |
419 | { | |
420 | value_ptr index = evaluate_subexp_with_coercion (exp, pos, noside); | |
421 | arg1 = value_subscript (arg1, index); | |
422 | } | |
423 | return (arg1); | |
61379835 PB |
424 | |
425 | case UNOP_LOWER: | |
426 | case UNOP_UPPER: | |
427 | (*pos)++; | |
428 | if (noside == EVAL_SKIP) | |
429 | { | |
430 | (*exp->language_defn->evaluate_exp) (NULL_TYPE, exp, pos, EVAL_SKIP); | |
431 | goto nosideret; | |
432 | } | |
433 | arg1 = (*exp->language_defn->evaluate_exp) (NULL_TYPE, exp, pos, | |
434 | EVAL_AVOID_SIDE_EFFECTS); | |
435 | tem = type_lower_upper (op, VALUE_TYPE (arg1), &type); | |
436 | return value_from_longest (type, tem); | |
437 | ||
438 | case UNOP_LENGTH: | |
439 | (*pos)++; | |
440 | arg1 = (*exp->language_defn->evaluate_exp) (NULL_TYPE, exp, pos, noside); | |
441 | return value_chill_length (arg1); | |
442 | ||
18d3d859 JK |
443 | default: |
444 | break; | |
7398958c PB |
445 | } |
446 | ||
447 | return evaluate_subexp_standard (expect_type, exp, pos, noside); | |
61379835 PB |
448 | nosideret: |
449 | return value_from_longest (builtin_type_long, (LONGEST) 1); | |
7398958c PB |
450 | } |
451 | ||
22e39759 FF |
452 | const struct language_defn chill_language_defn = { |
453 | "chill", | |
454 | language_chill, | |
455 | chill_builtin_types, | |
456 | range_check_on, | |
457 | type_check_on, | |
458 | chill_parse, /* parser */ | |
459 | chill_error, /* parser error function */ | |
7398958c | 460 | evaluate_subexp_chill, |
22e39759 FF |
461 | chill_printchar, /* print a character constant */ |
462 | chill_printstr, /* function to print a string constant */ | |
463 | chill_create_fundamental_type,/* Create fundamental type in this language */ | |
a8a69e63 FF |
464 | chill_print_type, /* Print a type using appropriate syntax */ |
465 | chill_val_print, /* Print a value using appropriate syntax */ | |
e10cfcaa | 466 | chill_value_print, /* Print a top-levl value */ |
22e39759 | 467 | {"", "B'", "", ""}, /* Binary format info */ |
5573d7d4 JK |
468 | {"O'%lo", "O'", "o", ""}, /* Octal format info */ |
469 | {"D'%ld", "D'", "d", ""}, /* Decimal format info */ | |
470 | {"H'%lx", "H'", "x", ""}, /* Hex format info */ | |
22e39759 | 471 | chill_op_print_tab, /* expression operators for printing */ |
acc4efde | 472 | 0, /* arrays are first-class (not c-style) */ |
ead95f8a PB |
473 | 0, /* String lower bound */ |
474 | &builtin_type_chill_char, /* Type of string elements */ | |
22e39759 FF |
475 | LANG_MAGIC |
476 | }; | |
477 | ||
478 | /* Initialization for Chill */ | |
479 | ||
480 | void | |
d62e7a20 | 481 | _initialize_chill_language () |
22e39759 FF |
482 | { |
483 | builtin_type_chill_bool = | |
484 | init_type (TYPE_CODE_BOOL, TARGET_CHAR_BIT / TARGET_CHAR_BIT, | |
485 | TYPE_FLAG_UNSIGNED, | |
486 | "BOOL", (struct objfile *) NULL); | |
487 | builtin_type_chill_char = | |
488 | init_type (TYPE_CODE_CHAR, TARGET_CHAR_BIT / TARGET_CHAR_BIT, | |
489 | TYPE_FLAG_UNSIGNED, | |
490 | "CHAR", (struct objfile *) NULL); | |
491 | builtin_type_chill_long = | |
492 | init_type (TYPE_CODE_INT, TARGET_LONG_BIT / TARGET_CHAR_BIT, | |
493 | 0, | |
494 | "LONG", (struct objfile *) NULL); | |
495 | builtin_type_chill_ulong = | |
496 | init_type (TYPE_CODE_INT, TARGET_LONG_BIT / TARGET_CHAR_BIT, | |
497 | TYPE_FLAG_UNSIGNED, | |
498 | "ULONG", (struct objfile *) NULL); | |
499 | builtin_type_chill_real = | |
500 | init_type (TYPE_CODE_FLT, TARGET_DOUBLE_BIT / TARGET_CHAR_BIT, | |
501 | 0, | |
502 | "LONG_REAL", (struct objfile *) NULL); | |
503 | ||
504 | add_language (&chill_language_defn); | |
505 | } |