1 /* C language support routines for GDB, the GNU debugger.
3 Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2002, 2003,
4 2004, 2005, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "expression.h"
25 #include "parser-defs.h"
29 #include "macroscope.h"
30 #include "gdb_assert.h"
32 #include "gdb_string.h"
35 #include "cp-support.h"
36 #include "gdb_obstack.h"
38 #include "exceptions.h"
40 extern void _initialize_c_language (void);
42 /* Given a C string type, STR_TYPE, return the corresponding target
43 character set name. */
46 charset_for_string_type (enum c_string_type str_type,
47 struct gdbarch *gdbarch)
49 switch (str_type & ~C_CHAR)
52 return target_charset (gdbarch);
54 return target_wide_charset (gdbarch);
56 /* FIXME: UTF-16 is not always correct. */
57 if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG)
62 /* FIXME: UTF-32 is not always correct. */
63 if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG)
68 internal_error (__FILE__, __LINE__, "unhandled c_string_type");
71 /* Classify ELTTYPE according to what kind of character it is. Return
72 the enum constant representing the character type. Also set
73 *ENCODING to the name of the character set to use when converting
74 characters of this type in target BYTE_ORDER to the host character
77 static enum c_string_type
78 classify_type (struct type *elttype, struct gdbarch *gdbarch,
79 const char **encoding)
81 enum c_string_type result;
83 /* We loop because ELTTYPE may be a typedef, and we want to
84 successively peel each typedef until we reach a type we
85 understand. We don't use CHECK_TYPEDEF because that will strip
86 all typedefs at once -- but in C, wchar_t is itself a typedef, so
87 that would do the wrong thing. */
90 char *name = TYPE_NAME (elttype);
92 if (TYPE_CODE (elttype) == TYPE_CODE_CHAR || !name)
98 if (!strcmp (name, "wchar_t"))
100 result = C_WIDE_CHAR;
104 if (!strcmp (name, "char16_t"))
110 if (!strcmp (name, "char32_t"))
116 if (TYPE_CODE (elttype) != TYPE_CODE_TYPEDEF)
119 /* Call for side effects. */
120 check_typedef (elttype);
122 if (TYPE_TARGET_TYPE (elttype))
123 elttype = TYPE_TARGET_TYPE (elttype);
126 /* Perhaps check_typedef did not update the target type. In
127 this case, force the lookup again and hope it works out.
128 It never will for C, but it might for C++. */
129 CHECK_TYPEDEF (elttype);
138 *encoding = charset_for_string_type (result, gdbarch);
143 /* Return true if print_wchar can display W without resorting to a
144 numeric escape, false otherwise. */
147 wchar_printable (gdb_wchar_t w)
149 return (gdb_iswprint (w)
150 || w == LCST ('\a') || w == LCST ('\b')
151 || w == LCST ('\f') || w == LCST ('\n')
152 || w == LCST ('\r') || w == LCST ('\t')
153 || w == LCST ('\v'));
156 /* A helper function that converts the contents of STRING to wide
157 characters and then appends them to OUTPUT. */
160 append_string_as_wide (const char *string,
161 struct obstack *output)
163 for (; *string; ++string)
165 gdb_wchar_t w = gdb_btowc (*string);
166 obstack_grow (output, &w, sizeof (gdb_wchar_t));
170 /* Print a wide character W to OUTPUT. ORIG is a pointer to the
171 original (target) bytes representing the character, ORIG_LEN is the
172 number of valid bytes. WIDTH is the number of bytes in a base
173 characters of the type. OUTPUT is an obstack to which wide
174 characters are emitted. QUOTER is a (narrow) character indicating
175 the style of quotes surrounding the character to be printed.
176 NEED_ESCAPE is an in/out flag which is used to track numeric
177 escapes across calls. */
180 print_wchar (gdb_wint_t w, const gdb_byte *orig,
181 int orig_len, int width,
182 enum bfd_endian byte_order,
183 struct obstack *output,
184 int quoter, int *need_escapep)
186 int need_escape = *need_escapep;
189 if (gdb_iswprint (w) && (!need_escape || (!gdb_iswdigit (w)
191 && w != LCST ('9'))))
193 gdb_wchar_t wchar = w;
195 if (w == gdb_btowc (quoter) || w == LCST ('\\'))
196 obstack_grow_wstr (output, LCST ("\\"));
197 obstack_grow (output, &wchar, sizeof (gdb_wchar_t));
204 obstack_grow_wstr (output, LCST ("\\a"));
207 obstack_grow_wstr (output, LCST ("\\b"));
210 obstack_grow_wstr (output, LCST ("\\f"));
213 obstack_grow_wstr (output, LCST ("\\n"));
216 obstack_grow_wstr (output, LCST ("\\r"));
219 obstack_grow_wstr (output, LCST ("\\t"));
222 obstack_grow_wstr (output, LCST ("\\v"));
228 for (i = 0; i + width <= orig_len; i += width)
233 value = extract_unsigned_integer (&orig[i], width,
235 /* If the value fits in 3 octal digits, print it that
236 way. Otherwise, print it as a hex escape. */
238 sprintf (octal, "\\%.3o", (int) (value & 0777));
240 sprintf (octal, "\\x%lx", (long) value);
241 append_string_as_wide (octal, output);
243 /* If we somehow have extra bytes, print them now. */
248 sprintf (octal, "\\%.3o", orig[i] & 0xff);
249 append_string_as_wide (octal, output);
260 /* Print the character C on STREAM as part of the contents of a
261 literal string whose delimiter is QUOTER. Note that that format
262 for printing characters and strings is language specific. */
265 c_emit_char (int c, struct type *type,
266 struct ui_file *stream, int quoter)
268 enum bfd_endian byte_order
269 = gdbarch_byte_order (get_type_arch (type));
270 struct obstack wchar_buf, output;
271 struct cleanup *cleanups;
272 const char *encoding;
274 struct wchar_iterator *iter;
277 classify_type (type, get_type_arch (type), &encoding);
279 buf = alloca (TYPE_LENGTH (type));
280 pack_long (buf, type, c);
282 iter = make_wchar_iterator (buf, TYPE_LENGTH (type),
283 encoding, TYPE_LENGTH (type));
284 cleanups = make_cleanup_wchar_iterator (iter);
286 /* This holds the printable form of the wchar_t data. */
287 obstack_init (&wchar_buf);
288 make_cleanup_obstack_free (&wchar_buf);
296 int print_escape = 1;
297 enum wchar_iterate_result result;
299 num_chars = wchar_iterate (iter, &result, &chars, &buf, &buflen);
304 /* If all characters are printable, print them. Otherwise,
305 we're going to have to print an escape sequence. We
306 check all characters because we want to print the target
307 bytes in the escape sequence, and we don't know character
312 for (i = 0; i < num_chars; ++i)
313 if (!wchar_printable (chars[i]))
321 for (i = 0; i < num_chars; ++i)
322 print_wchar (chars[i], buf, buflen,
323 TYPE_LENGTH (type), byte_order,
324 &wchar_buf, quoter, &need_escape);
328 /* This handles the NUM_CHARS == 0 case as well. */
330 print_wchar (gdb_WEOF, buf, buflen, TYPE_LENGTH (type),
331 byte_order, &wchar_buf, quoter, &need_escape);
334 /* The output in the host encoding. */
335 obstack_init (&output);
336 make_cleanup_obstack_free (&output);
338 convert_between_encodings (INTERMEDIATE_ENCODING, host_charset (),
339 obstack_base (&wchar_buf),
340 obstack_object_size (&wchar_buf),
341 1, &output, translit_char);
342 obstack_1grow (&output, '\0');
344 fputs_filtered (obstack_base (&output), stream);
346 do_cleanups (cleanups);
350 c_printchar (int c, struct type *type, struct ui_file *stream)
352 enum c_string_type str_type;
354 str_type = classify_type (type, get_type_arch (type), NULL);
360 fputc_filtered ('L', stream);
363 fputc_filtered ('u', stream);
366 fputc_filtered ('U', stream);
370 fputc_filtered ('\'', stream);
371 LA_EMIT_CHAR (c, type, stream, '\'');
372 fputc_filtered ('\'', stream);
375 /* Print the character string STRING, printing at most LENGTH
376 characters. LENGTH is -1 if the string is nul terminated. Each
377 character is WIDTH bytes long. Printing stops early if the number
378 hits print_max; repeat counts are printed as appropriate. Print
379 ellipses at the end if we had to stop before printing LENGTH
380 characters, or if FORCE_ELLIPSES. */
383 c_printstr (struct ui_file *stream, struct type *type,
384 const gdb_byte *string, unsigned int length,
385 const char *user_encoding, int force_ellipses,
386 const struct value_print_options *options)
388 enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (type));
390 unsigned int things_printed = 0;
393 int width = TYPE_LENGTH (type);
394 struct obstack wchar_buf, output;
395 struct cleanup *cleanup;
396 enum c_string_type str_type;
397 const char *type_encoding;
398 const char *encoding;
399 struct wchar_iterator *iter;
405 unsigned long current_char = 1;
407 for (i = 0; current_char; ++i)
410 current_char = extract_unsigned_integer (string + i * width,
416 /* If the string was not truncated due to `set print elements', and
417 the last byte of it is a null, we don't print that, in
418 traditional C style. */
421 && (extract_unsigned_integer (string + (length - 1) * width,
422 width, byte_order) == 0))
425 str_type = (classify_type (type, get_type_arch (type), &type_encoding)
432 fputs_filtered ("L", stream);
435 fputs_filtered ("u", stream);
438 fputs_filtered ("U", stream);
442 encoding = (user_encoding && *user_encoding)
443 ? user_encoding : type_encoding;
447 fputs_filtered ("\"\"", stream);
451 /* Arrange to iterate over the characters, in wchar_t form. */
452 iter = make_wchar_iterator (string, length * width, encoding, width);
453 cleanup = make_cleanup_wchar_iterator (iter);
455 /* WCHAR_BUF is the obstack we use to represent the string in
457 obstack_init (&wchar_buf);
458 make_cleanup_obstack_free (&wchar_buf);
460 while (!finished && things_printed < options->print_max)
463 enum wchar_iterate_result result;
472 obstack_grow_wstr (&wchar_buf, LCST (", "));
476 num_chars = wchar_iterate (iter, &result, &chars, &buf, &buflen);
477 /* We only look at repetitions when we were able to convert a
478 single character in isolation. This makes the code simpler
479 and probably does the sensible thing in the majority of
481 while (num_chars == 1 && things_printed < options->print_max)
483 /* Count the number of repetitions. */
484 unsigned int reps = 0;
485 gdb_wchar_t current_char = chars[0];
486 const gdb_byte *orig_buf = buf;
487 int orig_len = buflen;
491 obstack_grow_wstr (&wchar_buf, LCST (", "));
495 while (num_chars == 1 && current_char == chars[0])
497 num_chars = wchar_iterate (iter, &result, &chars,
502 /* Emit CURRENT_CHAR according to the repetition count and
504 if (reps > options->repeat_count_threshold)
508 if (options->inspect_it)
509 obstack_grow_wstr (&wchar_buf, LCST ("\\\", "));
511 obstack_grow_wstr (&wchar_buf, LCST ("\", "));
514 obstack_grow_wstr (&wchar_buf, LCST ("'"));
516 print_wchar (current_char, orig_buf, orig_len, width,
517 byte_order, &wchar_buf, '\'', &need_escape);
518 obstack_grow_wstr (&wchar_buf, LCST ("'"));
520 /* Painful gyrations. */
522 char *s = xstrprintf (_(" <repeats %u times>"), reps);
524 for (j = 0; s[j]; ++j)
526 gdb_wchar_t w = gdb_btowc (s[j]);
527 obstack_grow (&wchar_buf, &w, sizeof (gdb_wchar_t));
531 things_printed += options->repeat_count_threshold;
536 /* Saw the character one or more times, but fewer than
537 the repetition threshold. */
540 if (options->inspect_it)
541 obstack_grow_wstr (&wchar_buf, LCST ("\\\""));
543 obstack_grow_wstr (&wchar_buf, LCST ("\""));
550 print_wchar (current_char, orig_buf,
552 byte_order, &wchar_buf,
559 /* NUM_CHARS and the other outputs from wchar_iterate are valid
560 here regardless of which branch was taken above. */
570 case wchar_iterate_invalid:
573 if (options->inspect_it)
574 obstack_grow_wstr (&wchar_buf, LCST ("\\\""));
576 obstack_grow_wstr (&wchar_buf, LCST ("\""));
580 print_wchar (gdb_WEOF, buf, buflen, width, byte_order,
581 &wchar_buf, '"', &need_escape);
584 case wchar_iterate_incomplete:
587 if (options->inspect_it)
588 obstack_grow_wstr (&wchar_buf, LCST ("\\\","));
590 obstack_grow_wstr (&wchar_buf, LCST ("\","));
593 obstack_grow_wstr (&wchar_buf,
594 LCST (" <incomplete sequence "));
595 print_wchar (gdb_WEOF, buf, buflen, width,
596 byte_order, &wchar_buf,
598 obstack_grow_wstr (&wchar_buf, LCST (">"));
604 /* Terminate the quotes if necessary. */
607 if (options->inspect_it)
608 obstack_grow_wstr (&wchar_buf, LCST ("\\\""));
610 obstack_grow_wstr (&wchar_buf, LCST ("\""));
613 if (force_ellipses || !finished)
614 obstack_grow_wstr (&wchar_buf, LCST ("..."));
616 /* OUTPUT is where we collect `char's for printing. */
617 obstack_init (&output);
618 make_cleanup_obstack_free (&output);
620 convert_between_encodings (INTERMEDIATE_ENCODING, host_charset (),
621 obstack_base (&wchar_buf),
622 obstack_object_size (&wchar_buf),
623 1, &output, translit_char);
624 obstack_1grow (&output, '\0');
626 fputs_filtered (obstack_base (&output), stream);
628 do_cleanups (cleanup);
631 /* Obtain a C string from the inferior storing it in a newly allocated
632 buffer in BUFFER, which should be freed by the caller. If the in-
633 and out-parameter *LENGTH is specified at -1, the string is read
634 until a null character of the appropriate width is found, otherwise
635 the string is read to the length of characters specified. The size
636 of a character is determined by the length of the target type of
637 the pointer or array. If VALUE is an array with a known length,
638 the function will not read past the end of the array. On
639 completion, *LENGTH will be set to the size of the string read in
640 characters. (If a length of -1 is specified, the length returned
641 will not include the null character). CHARSET is always set to the
645 c_get_string (struct value *value, gdb_byte **buffer,
646 int *length, struct type **char_type,
647 const char **charset)
650 unsigned int fetchlimit;
651 struct type *type = check_typedef (value_type (value));
652 struct type *element_type = TYPE_TARGET_TYPE (type);
653 int req_length = *length;
654 enum bfd_endian byte_order
655 = gdbarch_byte_order (get_type_arch (type));
656 enum c_string_type kind;
658 if (element_type == NULL)
661 if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
663 /* If we know the size of the array, we can use it as a limit on
664 the number of characters to be fetched. */
665 if (TYPE_NFIELDS (type) == 1
666 && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_RANGE)
668 LONGEST low_bound, high_bound;
670 get_discrete_bounds (TYPE_FIELD_TYPE (type, 0),
671 &low_bound, &high_bound);
672 fetchlimit = high_bound - low_bound + 1;
675 fetchlimit = UINT_MAX;
677 else if (TYPE_CODE (type) == TYPE_CODE_PTR)
678 fetchlimit = UINT_MAX;
680 /* We work only with arrays and pointers. */
683 if (! c_textual_element_type (element_type, 0))
685 kind = classify_type (element_type,
686 get_type_arch (element_type),
688 width = TYPE_LENGTH (element_type);
690 /* If the string lives in GDB's memory instead of the inferior's,
691 then we just need to copy it to BUFFER. Also, since such strings
692 are arrays with known size, FETCHLIMIT will hold the size of the
694 if ((VALUE_LVAL (value) == not_lval
695 || VALUE_LVAL (value) == lval_internalvar)
696 && fetchlimit != UINT_MAX)
699 const gdb_byte *contents = value_contents (value);
701 /* If a length is specified, use that. */
705 /* Otherwise, look for a null character. */
706 for (i = 0; i < fetchlimit; i++)
707 if (extract_unsigned_integer (contents + i * width,
708 width, byte_order) == 0)
711 /* I is now either a user-defined length, the number of non-null
712 characters, or FETCHLIMIT. */
714 *buffer = xmalloc (*length);
715 memcpy (*buffer, contents, *length);
720 CORE_ADDR addr = value_as_address (value);
722 err = read_string (addr, *length, width, fetchlimit,
723 byte_order, buffer, length);
728 throw_error (MEMORY_ERROR, "Address %s out of bounds",
729 paddress (get_type_arch (type), addr));
731 error (_("Error reading string from inferior: %s"),
732 safe_strerror (err));
736 /* If the LENGTH is specified at -1, we want to return the string
737 length up to the terminating null character. If an actual length
738 was specified, we want to return the length of exactly what was
740 if (req_length == -1)
741 /* If the last character is null, subtract it from LENGTH. */
743 && extract_unsigned_integer (*buffer + *length - width,
744 width, byte_order) == 0)
747 /* The read_string function will return the number of bytes read.
748 If length returned from read_string was > 0, return the number of
749 characters read by dividing the number of bytes by width. */
751 *length = *length / width;
753 *char_type = element_type;
761 type_str = type_to_string (type);
764 make_cleanup (xfree, type_str);
765 error (_("Trying to read string with inappropriate type `%s'."),
769 error (_("Trying to read string with inappropriate type."));
774 /* Evaluating C and C++ expressions. */
776 /* Convert a UCN. The digits of the UCN start at P and extend no
777 farther than LIMIT. DEST_CHARSET is the name of the character set
778 into which the UCN should be converted. The results are written to
779 OUTPUT. LENGTH is the maximum length of the UCN, either 4 or 8.
780 Returns a pointer to just after the final digit of the UCN. */
783 convert_ucn (char *p, char *limit, const char *dest_charset,
784 struct obstack *output, int length)
786 unsigned long result = 0;
790 for (i = 0; i < length && p < limit && isxdigit (*p); ++i, ++p)
791 result = (result << 4) + host_hex_value (*p);
793 for (i = 3; i >= 0; --i)
795 data[i] = result & 0xff;
799 convert_between_encodings ("UTF-32BE", dest_charset, data,
800 4, 4, output, translit_none);
805 /* Emit a character, VALUE, which was specified numerically, to
806 OUTPUT. TYPE is the target character type. */
809 emit_numeric_character (struct type *type, unsigned long value,
810 struct obstack *output)
814 buffer = alloca (TYPE_LENGTH (type));
815 pack_long (buffer, type, value);
816 obstack_grow (output, buffer, TYPE_LENGTH (type));
819 /* Convert an octal escape sequence. TYPE is the target character
820 type. The digits of the escape sequence begin at P and extend no
821 farther than LIMIT. The result is written to OUTPUT. Returns a
822 pointer to just after the final digit of the escape sequence. */
825 convert_octal (struct type *type, char *p,
826 char *limit, struct obstack *output)
829 unsigned long value = 0;
832 i < 3 && p < limit && isdigit (*p) && *p != '8' && *p != '9';
835 value = 8 * value + host_hex_value (*p);
839 emit_numeric_character (type, value, output);
844 /* Convert a hex escape sequence. TYPE is the target character type.
845 The digits of the escape sequence begin at P and extend no farther
846 than LIMIT. The result is written to OUTPUT. Returns a pointer to
847 just after the final digit of the escape sequence. */
850 convert_hex (struct type *type, char *p,
851 char *limit, struct obstack *output)
853 unsigned long value = 0;
855 while (p < limit && isxdigit (*p))
857 value = 16 * value + host_hex_value (*p);
861 emit_numeric_character (type, value, output);
870 error (_("Malformed escape sequence")); \
873 /* Convert an escape sequence to a target format. TYPE is the target
874 character type to use, and DEST_CHARSET is the name of the target
875 character set. The backslash of the escape sequence is at *P, and
876 the escape sequence will not extend past LIMIT. The results are
877 written to OUTPUT. Returns a pointer to just past the final
878 character of the escape sequence. */
881 convert_escape (struct type *type, const char *dest_charset,
882 char *p, char *limit, struct obstack *output)
884 /* Skip the backslash. */
890 obstack_1grow (output, '\\');
897 error (_("\\x used with no following hex digits."));
898 p = convert_hex (type, p, limit, output);
909 p = convert_octal (type, p, limit, output);
915 int length = *p == 'u' ? 4 : 8;
919 error (_("\\u used with no following hex digits"));
920 p = convert_ucn (p, limit, dest_charset, output, length);
927 /* Given a single string from a (C-specific) OP_STRING list, convert
928 it to a target string, handling escape sequences specially. The
929 output is written to OUTPUT. DATA is the input string, which has
930 length LEN. DEST_CHARSET is the name of the target character set,
931 and TYPE is the type of target character to use. */
934 parse_one_string (struct obstack *output, char *data, int len,
935 const char *dest_charset, struct type *type)
945 /* Look for next escape, or the end of the input. */
946 while (p < limit && *p != '\\')
948 /* If we saw a run of characters, convert them all. */
950 convert_between_encodings (host_charset (), dest_charset,
952 output, translit_none);
953 /* If we saw an escape, convert it. */
955 p = convert_escape (type, dest_charset, p, limit, output);
960 /* Expression evaluator for the C language family. Most operations
961 are delegated to evaluate_subexp_standard; see that function for a
962 description of the arguments. */
965 evaluate_subexp_c (struct type *expect_type, struct expression *exp,
966 int *pos, enum noside noside)
968 enum exp_opcode op = exp->elts[*pos].opcode;
976 struct obstack output;
977 struct cleanup *cleanup;
978 struct value *result;
979 enum c_string_type dest_type;
980 const char *dest_charset;
982 obstack_init (&output);
983 cleanup = make_cleanup_obstack_free (&output);
986 oplen = longest_to_int (exp->elts[*pos].longconst);
989 limit = *pos + BYTES_TO_EXP_ELEM (oplen + 1);
991 = (enum c_string_type) longest_to_int (exp->elts[*pos].longconst);
992 switch (dest_type & ~C_CHAR)
995 type = language_string_char_type (exp->language_defn,
999 type = lookup_typename (exp->language_defn, exp->gdbarch,
1000 "wchar_t", NULL, 0);
1003 type = lookup_typename (exp->language_defn, exp->gdbarch,
1004 "char16_t", NULL, 0);
1007 type = lookup_typename (exp->language_defn, exp->gdbarch,
1008 "char32_t", NULL, 0);
1011 internal_error (__FILE__, __LINE__, "unhandled c_string_type");
1014 /* Ensure TYPE_LENGTH is valid for TYPE. */
1015 check_typedef (type);
1017 dest_charset = charset_for_string_type (dest_type, exp->gdbarch);
1020 while (*pos < limit)
1024 len = longest_to_int (exp->elts[*pos].longconst);
1027 if (noside != EVAL_SKIP)
1028 parse_one_string (&output, &exp->elts[*pos].string, len,
1029 dest_charset, type);
1030 *pos += BYTES_TO_EXP_ELEM (len);
1033 /* Skip the trailing length and opcode. */
1036 if (noside == EVAL_SKIP)
1038 /* Return a dummy value of the appropriate type. */
1039 if ((dest_type & C_CHAR) != 0)
1040 result = allocate_value (type);
1042 result = value_cstring ("", 0, type);
1043 do_cleanups (cleanup);
1047 if ((dest_type & C_CHAR) != 0)
1051 if (obstack_object_size (&output) != TYPE_LENGTH (type))
1052 error (_("Could not convert character constant to target character set"));
1053 value = unpack_long (type, obstack_base (&output));
1054 result = value_from_longest (type, value);
1060 /* Write the terminating character. */
1061 for (i = 0; i < TYPE_LENGTH (type); ++i)
1062 obstack_1grow (&output, 0);
1063 result = value_cstring (obstack_base (&output),
1064 obstack_object_size (&output),
1067 do_cleanups (cleanup);
1075 return evaluate_subexp_standard (expect_type, exp, pos, noside);
1080 /* Table mapping opcodes into strings for printing operators
1081 and precedences of the operators. */
1083 const struct op_print c_op_print_tab[] =
1085 {",", BINOP_COMMA, PREC_COMMA, 0},
1086 {"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
1087 {"||", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
1088 {"&&", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
1089 {"|", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0},
1090 {"^", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0},
1091 {"&", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0},
1092 {"==", BINOP_EQUAL, PREC_EQUAL, 0},
1093 {"!=", BINOP_NOTEQUAL, PREC_EQUAL, 0},
1094 {"<=", BINOP_LEQ, PREC_ORDER, 0},
1095 {">=", BINOP_GEQ, PREC_ORDER, 0},
1096 {">", BINOP_GTR, PREC_ORDER, 0},
1097 {"<", BINOP_LESS, PREC_ORDER, 0},
1098 {">>", BINOP_RSH, PREC_SHIFT, 0},
1099 {"<<", BINOP_LSH, PREC_SHIFT, 0},
1100 {"+", BINOP_ADD, PREC_ADD, 0},
1101 {"-", BINOP_SUB, PREC_ADD, 0},
1102 {"*", BINOP_MUL, PREC_MUL, 0},
1103 {"/", BINOP_DIV, PREC_MUL, 0},
1104 {"%", BINOP_REM, PREC_MUL, 0},
1105 {"@", BINOP_REPEAT, PREC_REPEAT, 0},
1106 {"-", UNOP_NEG, PREC_PREFIX, 0},
1107 {"!", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
1108 {"~", UNOP_COMPLEMENT, PREC_PREFIX, 0},
1109 {"*", UNOP_IND, PREC_PREFIX, 0},
1110 {"&", UNOP_ADDR, PREC_PREFIX, 0},
1111 {"sizeof ", UNOP_SIZEOF, PREC_PREFIX, 0},
1112 {"++", UNOP_PREINCREMENT, PREC_PREFIX, 0},
1113 {"--", UNOP_PREDECREMENT, PREC_PREFIX, 0},
1117 enum c_primitive_types {
1118 c_primitive_type_int,
1119 c_primitive_type_long,
1120 c_primitive_type_short,
1121 c_primitive_type_char,
1122 c_primitive_type_float,
1123 c_primitive_type_double,
1124 c_primitive_type_void,
1125 c_primitive_type_long_long,
1126 c_primitive_type_signed_char,
1127 c_primitive_type_unsigned_char,
1128 c_primitive_type_unsigned_short,
1129 c_primitive_type_unsigned_int,
1130 c_primitive_type_unsigned_long,
1131 c_primitive_type_unsigned_long_long,
1132 c_primitive_type_long_double,
1133 c_primitive_type_complex,
1134 c_primitive_type_double_complex,
1135 c_primitive_type_decfloat,
1136 c_primitive_type_decdouble,
1137 c_primitive_type_declong,
1138 nr_c_primitive_types
1142 c_language_arch_info (struct gdbarch *gdbarch,
1143 struct language_arch_info *lai)
1145 const struct builtin_type *builtin = builtin_type (gdbarch);
1147 lai->string_char_type = builtin->builtin_char;
1148 lai->primitive_type_vector
1149 = GDBARCH_OBSTACK_CALLOC (gdbarch, nr_c_primitive_types + 1,
1151 lai->primitive_type_vector [c_primitive_type_int] = builtin->builtin_int;
1152 lai->primitive_type_vector [c_primitive_type_long] = builtin->builtin_long;
1153 lai->primitive_type_vector [c_primitive_type_short] = builtin->builtin_short;
1154 lai->primitive_type_vector [c_primitive_type_char] = builtin->builtin_char;
1155 lai->primitive_type_vector [c_primitive_type_float] = builtin->builtin_float;
1156 lai->primitive_type_vector [c_primitive_type_double] = builtin->builtin_double;
1157 lai->primitive_type_vector [c_primitive_type_void] = builtin->builtin_void;
1158 lai->primitive_type_vector [c_primitive_type_long_long] = builtin->builtin_long_long;
1159 lai->primitive_type_vector [c_primitive_type_signed_char] = builtin->builtin_signed_char;
1160 lai->primitive_type_vector [c_primitive_type_unsigned_char] = builtin->builtin_unsigned_char;
1161 lai->primitive_type_vector [c_primitive_type_unsigned_short] = builtin->builtin_unsigned_short;
1162 lai->primitive_type_vector [c_primitive_type_unsigned_int] = builtin->builtin_unsigned_int;
1163 lai->primitive_type_vector [c_primitive_type_unsigned_long] = builtin->builtin_unsigned_long;
1164 lai->primitive_type_vector [c_primitive_type_unsigned_long_long] = builtin->builtin_unsigned_long_long;
1165 lai->primitive_type_vector [c_primitive_type_long_double] = builtin->builtin_long_double;
1166 lai->primitive_type_vector [c_primitive_type_complex] = builtin->builtin_complex;
1167 lai->primitive_type_vector [c_primitive_type_double_complex] = builtin->builtin_double_complex;
1168 lai->primitive_type_vector [c_primitive_type_decfloat] = builtin->builtin_decfloat;
1169 lai->primitive_type_vector [c_primitive_type_decdouble] = builtin->builtin_decdouble;
1170 lai->primitive_type_vector [c_primitive_type_declong] = builtin->builtin_declong;
1172 lai->bool_type_default = builtin->builtin_int;
1175 const struct exp_descriptor exp_descriptor_c =
1177 print_subexp_standard,
1178 operator_length_standard,
1179 operator_check_standard,
1181 dump_subexp_body_standard,
1185 const struct language_defn c_language_defn =
1187 "c", /* Language name */
1198 c_printchar, /* Print a character constant */
1199 c_printstr, /* Function to print string constant */
1200 c_emit_char, /* Print a single char */
1201 c_print_type, /* Print a type using appropriate syntax */
1202 c_print_typedef, /* Print a typedef using appropriate syntax */
1203 c_val_print, /* Print a value using appropriate syntax */
1204 c_value_print, /* Print a top-level value */
1205 NULL, /* Language specific skip_trampoline */
1206 NULL, /* name_of_this */
1207 basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
1208 basic_lookup_transparent_type,/* lookup_transparent_type */
1209 NULL, /* Language specific symbol demangler */
1210 NULL, /* Language specific
1211 class_name_from_physname */
1212 c_op_print_tab, /* expression operators for printing */
1213 1, /* c-style arrays */
1214 0, /* String lower bound */
1215 default_word_break_characters,
1216 default_make_symbol_completion_list,
1217 c_language_arch_info,
1218 default_print_array_index,
1219 default_pass_by_reference,
1224 enum cplus_primitive_types {
1225 cplus_primitive_type_int,
1226 cplus_primitive_type_long,
1227 cplus_primitive_type_short,
1228 cplus_primitive_type_char,
1229 cplus_primitive_type_float,
1230 cplus_primitive_type_double,
1231 cplus_primitive_type_void,
1232 cplus_primitive_type_long_long,
1233 cplus_primitive_type_signed_char,
1234 cplus_primitive_type_unsigned_char,
1235 cplus_primitive_type_unsigned_short,
1236 cplus_primitive_type_unsigned_int,
1237 cplus_primitive_type_unsigned_long,
1238 cplus_primitive_type_unsigned_long_long,
1239 cplus_primitive_type_long_double,
1240 cplus_primitive_type_complex,
1241 cplus_primitive_type_double_complex,
1242 cplus_primitive_type_bool,
1243 cplus_primitive_type_decfloat,
1244 cplus_primitive_type_decdouble,
1245 cplus_primitive_type_declong,
1246 nr_cplus_primitive_types
1250 cplus_language_arch_info (struct gdbarch *gdbarch,
1251 struct language_arch_info *lai)
1253 const struct builtin_type *builtin = builtin_type (gdbarch);
1255 lai->string_char_type = builtin->builtin_char;
1256 lai->primitive_type_vector
1257 = GDBARCH_OBSTACK_CALLOC (gdbarch, nr_cplus_primitive_types + 1,
1259 lai->primitive_type_vector [cplus_primitive_type_int]
1260 = builtin->builtin_int;
1261 lai->primitive_type_vector [cplus_primitive_type_long]
1262 = builtin->builtin_long;
1263 lai->primitive_type_vector [cplus_primitive_type_short]
1264 = builtin->builtin_short;
1265 lai->primitive_type_vector [cplus_primitive_type_char]
1266 = builtin->builtin_char;
1267 lai->primitive_type_vector [cplus_primitive_type_float]
1268 = builtin->builtin_float;
1269 lai->primitive_type_vector [cplus_primitive_type_double]
1270 = builtin->builtin_double;
1271 lai->primitive_type_vector [cplus_primitive_type_void]
1272 = builtin->builtin_void;
1273 lai->primitive_type_vector [cplus_primitive_type_long_long]
1274 = builtin->builtin_long_long;
1275 lai->primitive_type_vector [cplus_primitive_type_signed_char]
1276 = builtin->builtin_signed_char;
1277 lai->primitive_type_vector [cplus_primitive_type_unsigned_char]
1278 = builtin->builtin_unsigned_char;
1279 lai->primitive_type_vector [cplus_primitive_type_unsigned_short]
1280 = builtin->builtin_unsigned_short;
1281 lai->primitive_type_vector [cplus_primitive_type_unsigned_int]
1282 = builtin->builtin_unsigned_int;
1283 lai->primitive_type_vector [cplus_primitive_type_unsigned_long]
1284 = builtin->builtin_unsigned_long;
1285 lai->primitive_type_vector [cplus_primitive_type_unsigned_long_long]
1286 = builtin->builtin_unsigned_long_long;
1287 lai->primitive_type_vector [cplus_primitive_type_long_double]
1288 = builtin->builtin_long_double;
1289 lai->primitive_type_vector [cplus_primitive_type_complex]
1290 = builtin->builtin_complex;
1291 lai->primitive_type_vector [cplus_primitive_type_double_complex]
1292 = builtin->builtin_double_complex;
1293 lai->primitive_type_vector [cplus_primitive_type_bool]
1294 = builtin->builtin_bool;
1295 lai->primitive_type_vector [cplus_primitive_type_decfloat]
1296 = builtin->builtin_decfloat;
1297 lai->primitive_type_vector [cplus_primitive_type_decdouble]
1298 = builtin->builtin_decdouble;
1299 lai->primitive_type_vector [cplus_primitive_type_declong]
1300 = builtin->builtin_declong;
1302 lai->bool_type_symbol = "bool";
1303 lai->bool_type_default = builtin->builtin_bool;
1306 const struct language_defn cplus_language_defn =
1308 "c++", /* Language name */
1319 c_printchar, /* Print a character constant */
1320 c_printstr, /* Function to print string constant */
1321 c_emit_char, /* Print a single char */
1322 c_print_type, /* Print a type using appropriate syntax */
1323 c_print_typedef, /* Print a typedef using appropriate syntax */
1324 c_val_print, /* Print a value using appropriate syntax */
1325 c_value_print, /* Print a top-level value */
1326 cplus_skip_trampoline, /* Language specific skip_trampoline */
1327 "this", /* name_of_this */
1328 cp_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
1329 cp_lookup_transparent_type, /* lookup_transparent_type */
1330 cplus_demangle, /* Language specific symbol demangler */
1331 cp_class_name_from_physname, /* Language specific
1332 class_name_from_physname */
1333 c_op_print_tab, /* expression operators for printing */
1334 1, /* c-style arrays */
1335 0, /* String lower bound */
1336 default_word_break_characters,
1337 default_make_symbol_completion_list,
1338 cplus_language_arch_info,
1339 default_print_array_index,
1340 cp_pass_by_reference,
1345 const struct language_defn asm_language_defn =
1347 "asm", /* Language name */
1358 c_printchar, /* Print a character constant */
1359 c_printstr, /* Function to print string constant */
1360 c_emit_char, /* Print a single char */
1361 c_print_type, /* Print a type using appropriate syntax */
1362 c_print_typedef, /* Print a typedef using appropriate syntax */
1363 c_val_print, /* Print a value using appropriate syntax */
1364 c_value_print, /* Print a top-level value */
1365 NULL, /* Language specific skip_trampoline */
1366 NULL, /* name_of_this */
1367 basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
1368 basic_lookup_transparent_type,/* lookup_transparent_type */
1369 NULL, /* Language specific symbol demangler */
1370 NULL, /* Language specific
1371 class_name_from_physname */
1372 c_op_print_tab, /* expression operators for printing */
1373 1, /* c-style arrays */
1374 0, /* String lower bound */
1375 default_word_break_characters,
1376 default_make_symbol_completion_list,
1377 c_language_arch_info, /* FIXME: la_language_arch_info. */
1378 default_print_array_index,
1379 default_pass_by_reference,
1384 /* The following language_defn does not represent a real language.
1385 It just provides a minimal support a-la-C that should allow users
1386 to do some simple operations when debugging applications that use
1387 a language currently not supported by GDB. */
1389 const struct language_defn minimal_language_defn =
1391 "minimal", /* Language name */
1402 c_printchar, /* Print a character constant */
1403 c_printstr, /* Function to print string constant */
1404 c_emit_char, /* Print a single char */
1405 c_print_type, /* Print a type using appropriate syntax */
1406 c_print_typedef, /* Print a typedef using appropriate syntax */
1407 c_val_print, /* Print a value using appropriate syntax */
1408 c_value_print, /* Print a top-level value */
1409 NULL, /* Language specific skip_trampoline */
1410 NULL, /* name_of_this */
1411 basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
1412 basic_lookup_transparent_type,/* lookup_transparent_type */
1413 NULL, /* Language specific symbol demangler */
1414 NULL, /* Language specific
1415 class_name_from_physname */
1416 c_op_print_tab, /* expression operators for printing */
1417 1, /* c-style arrays */
1418 0, /* String lower bound */
1419 default_word_break_characters,
1420 default_make_symbol_completion_list,
1421 c_language_arch_info,
1422 default_print_array_index,
1423 default_pass_by_reference,
1429 _initialize_c_language (void)
1431 add_language (&c_language_defn);
1432 add_language (&cplus_language_defn);
1433 add_language (&asm_language_defn);
1434 add_language (&minimal_language_defn);