| 1 | /* Print values for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright (C) 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, |
| 4 | 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 |
| 5 | Free Software Foundation, Inc. |
| 6 | |
| 7 | This file is part of GDB. |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 2 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program; if not, write to the Free Software |
| 21 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| 22 | Boston, MA 02110-1301, USA. */ |
| 23 | |
| 24 | #include "defs.h" |
| 25 | #include "gdb_string.h" |
| 26 | #include "symtab.h" |
| 27 | #include "gdbtypes.h" |
| 28 | #include "value.h" |
| 29 | #include "gdbcore.h" |
| 30 | #include "gdbcmd.h" |
| 31 | #include "target.h" |
| 32 | #include "language.h" |
| 33 | #include "annotate.h" |
| 34 | #include "valprint.h" |
| 35 | #include "floatformat.h" |
| 36 | #include "doublest.h" |
| 37 | #include "exceptions.h" |
| 38 | |
| 39 | #include <errno.h> |
| 40 | |
| 41 | /* Prototypes for local functions */ |
| 42 | |
| 43 | static int partial_memory_read (CORE_ADDR memaddr, gdb_byte *myaddr, |
| 44 | int len, int *errnoptr); |
| 45 | |
| 46 | static void show_print (char *, int); |
| 47 | |
| 48 | static void set_print (char *, int); |
| 49 | |
| 50 | static void set_radix (char *, int); |
| 51 | |
| 52 | static void show_radix (char *, int); |
| 53 | |
| 54 | static void set_input_radix (char *, int, struct cmd_list_element *); |
| 55 | |
| 56 | static void set_input_radix_1 (int, unsigned); |
| 57 | |
| 58 | static void set_output_radix (char *, int, struct cmd_list_element *); |
| 59 | |
| 60 | static void set_output_radix_1 (int, unsigned); |
| 61 | |
| 62 | void _initialize_valprint (void); |
| 63 | |
| 64 | /* Maximum number of chars to print for a string pointer value or vector |
| 65 | contents, or UINT_MAX for no limit. Note that "set print elements 0" |
| 66 | stores UINT_MAX in print_max, which displays in a show command as |
| 67 | "unlimited". */ |
| 68 | |
| 69 | unsigned int print_max; |
| 70 | #define PRINT_MAX_DEFAULT 200 /* Start print_max off at this value. */ |
| 71 | static void |
| 72 | show_print_max (struct ui_file *file, int from_tty, |
| 73 | struct cmd_list_element *c, const char *value) |
| 74 | { |
| 75 | fprintf_filtered (file, _("\ |
| 76 | Limit on string chars or array elements to print is %s.\n"), |
| 77 | value); |
| 78 | } |
| 79 | |
| 80 | |
| 81 | /* Default input and output radixes, and output format letter. */ |
| 82 | |
| 83 | unsigned input_radix = 10; |
| 84 | static void |
| 85 | show_input_radix (struct ui_file *file, int from_tty, |
| 86 | struct cmd_list_element *c, const char *value) |
| 87 | { |
| 88 | fprintf_filtered (file, _("\ |
| 89 | Default input radix for entering numbers is %s.\n"), |
| 90 | value); |
| 91 | } |
| 92 | |
| 93 | unsigned output_radix = 10; |
| 94 | static void |
| 95 | show_output_radix (struct ui_file *file, int from_tty, |
| 96 | struct cmd_list_element *c, const char *value) |
| 97 | { |
| 98 | fprintf_filtered (file, _("\ |
| 99 | Default output radix for printing of values is %s.\n"), |
| 100 | value); |
| 101 | } |
| 102 | int output_format = 0; |
| 103 | |
| 104 | /* By default we print arrays without printing the index of each element in |
| 105 | the array. This behavior can be changed by setting PRINT_ARRAY_INDEXES. */ |
| 106 | |
| 107 | static int print_array_indexes = 0; |
| 108 | static void |
| 109 | show_print_array_indexes (struct ui_file *file, int from_tty, |
| 110 | struct cmd_list_element *c, const char *value) |
| 111 | { |
| 112 | fprintf_filtered (file, _("Printing of array indexes is %s.\n"), value); |
| 113 | } |
| 114 | |
| 115 | /* Print repeat counts if there are more than this many repetitions of an |
| 116 | element in an array. Referenced by the low level language dependent |
| 117 | print routines. */ |
| 118 | |
| 119 | unsigned int repeat_count_threshold = 10; |
| 120 | static void |
| 121 | show_repeat_count_threshold (struct ui_file *file, int from_tty, |
| 122 | struct cmd_list_element *c, const char *value) |
| 123 | { |
| 124 | fprintf_filtered (file, _("Threshold for repeated print elements is %s.\n"), |
| 125 | value); |
| 126 | } |
| 127 | |
| 128 | /* If nonzero, stops printing of char arrays at first null. */ |
| 129 | |
| 130 | int stop_print_at_null; |
| 131 | static void |
| 132 | show_stop_print_at_null (struct ui_file *file, int from_tty, |
| 133 | struct cmd_list_element *c, const char *value) |
| 134 | { |
| 135 | fprintf_filtered (file, _("\ |
| 136 | Printing of char arrays to stop at first null char is %s.\n"), |
| 137 | value); |
| 138 | } |
| 139 | |
| 140 | /* Controls pretty printing of structures. */ |
| 141 | |
| 142 | int prettyprint_structs; |
| 143 | static void |
| 144 | show_prettyprint_structs (struct ui_file *file, int from_tty, |
| 145 | struct cmd_list_element *c, const char *value) |
| 146 | { |
| 147 | fprintf_filtered (file, _("Prettyprinting of structures is %s.\n"), value); |
| 148 | } |
| 149 | |
| 150 | /* Controls pretty printing of arrays. */ |
| 151 | |
| 152 | int prettyprint_arrays; |
| 153 | static void |
| 154 | show_prettyprint_arrays (struct ui_file *file, int from_tty, |
| 155 | struct cmd_list_element *c, const char *value) |
| 156 | { |
| 157 | fprintf_filtered (file, _("Prettyprinting of arrays is %s.\n"), value); |
| 158 | } |
| 159 | |
| 160 | /* If nonzero, causes unions inside structures or other unions to be |
| 161 | printed. */ |
| 162 | |
| 163 | int unionprint; /* Controls printing of nested unions. */ |
| 164 | static void |
| 165 | show_unionprint (struct ui_file *file, int from_tty, |
| 166 | struct cmd_list_element *c, const char *value) |
| 167 | { |
| 168 | fprintf_filtered (file, _("\ |
| 169 | Printing of unions interior to structures is %s.\n"), |
| 170 | value); |
| 171 | } |
| 172 | |
| 173 | /* If nonzero, causes machine addresses to be printed in certain contexts. */ |
| 174 | |
| 175 | int addressprint; /* Controls printing of machine addresses */ |
| 176 | static void |
| 177 | show_addressprint (struct ui_file *file, int from_tty, |
| 178 | struct cmd_list_element *c, const char *value) |
| 179 | { |
| 180 | fprintf_filtered (file, _("Printing of addresses is %s.\n"), value); |
| 181 | } |
| 182 | \f |
| 183 | |
| 184 | /* Print data of type TYPE located at VALADDR (within GDB), which came from |
| 185 | the inferior at address ADDRESS, onto stdio stream STREAM according to |
| 186 | FORMAT (a letter, or 0 for natural format using TYPE). |
| 187 | |
| 188 | If DEREF_REF is nonzero, then dereference references, otherwise just print |
| 189 | them like pointers. |
| 190 | |
| 191 | The PRETTY parameter controls prettyprinting. |
| 192 | |
| 193 | If the data are a string pointer, returns the number of string characters |
| 194 | printed. |
| 195 | |
| 196 | FIXME: The data at VALADDR is in target byte order. If gdb is ever |
| 197 | enhanced to be able to debug more than the single target it was compiled |
| 198 | for (specific CPU type and thus specific target byte ordering), then |
| 199 | either the print routines are going to have to take this into account, |
| 200 | or the data is going to have to be passed into here already converted |
| 201 | to the host byte ordering, whichever is more convenient. */ |
| 202 | |
| 203 | |
| 204 | int |
| 205 | val_print (struct type *type, const gdb_byte *valaddr, int embedded_offset, |
| 206 | CORE_ADDR address, struct ui_file *stream, int format, |
| 207 | int deref_ref, int recurse, enum val_prettyprint pretty) |
| 208 | { |
| 209 | volatile struct gdb_exception except; |
| 210 | volatile enum val_prettyprint real_pretty = pretty; |
| 211 | int ret = 0; |
| 212 | |
| 213 | struct type *real_type = check_typedef (type); |
| 214 | if (pretty == Val_pretty_default) |
| 215 | real_pretty = prettyprint_structs ? Val_prettyprint : Val_no_prettyprint; |
| 216 | |
| 217 | QUIT; |
| 218 | |
| 219 | /* Ensure that the type is complete and not just a stub. If the type is |
| 220 | only a stub and we can't find and substitute its complete type, then |
| 221 | print appropriate string and return. */ |
| 222 | |
| 223 | if (TYPE_STUB (real_type)) |
| 224 | { |
| 225 | fprintf_filtered (stream, "<incomplete type>"); |
| 226 | gdb_flush (stream); |
| 227 | return (0); |
| 228 | } |
| 229 | |
| 230 | TRY_CATCH (except, RETURN_MASK_ERROR) |
| 231 | { |
| 232 | ret = LA_VAL_PRINT (type, valaddr, embedded_offset, address, |
| 233 | stream, format, deref_ref, recurse, real_pretty); |
| 234 | } |
| 235 | if (except.reason < 0) |
| 236 | fprintf_filtered (stream, _("<error reading variable>")); |
| 237 | |
| 238 | return ret; |
| 239 | } |
| 240 | |
| 241 | /* Check whether the value VAL is printable. Return 1 if it is; |
| 242 | return 0 and print an appropriate error message to STREAM if it |
| 243 | is not. */ |
| 244 | |
| 245 | static int |
| 246 | value_check_printable (struct value *val, struct ui_file *stream) |
| 247 | { |
| 248 | if (val == 0) |
| 249 | { |
| 250 | fprintf_filtered (stream, _("<address of value unknown>")); |
| 251 | return 0; |
| 252 | } |
| 253 | |
| 254 | if (value_optimized_out (val)) |
| 255 | { |
| 256 | fprintf_filtered (stream, _("<value optimized out>")); |
| 257 | return 0; |
| 258 | } |
| 259 | |
| 260 | return 1; |
| 261 | } |
| 262 | |
| 263 | /* Print the value VAL onto stream STREAM according to FORMAT (a |
| 264 | letter, or 0 for natural format using TYPE). |
| 265 | |
| 266 | If DEREF_REF is nonzero, then dereference references, otherwise just print |
| 267 | them like pointers. |
| 268 | |
| 269 | The PRETTY parameter controls prettyprinting. |
| 270 | |
| 271 | If the data are a string pointer, returns the number of string characters |
| 272 | printed. |
| 273 | |
| 274 | This is a preferable interface to val_print, above, because it uses |
| 275 | GDB's value mechanism. */ |
| 276 | |
| 277 | int |
| 278 | common_val_print (struct value *val, struct ui_file *stream, int format, |
| 279 | int deref_ref, int recurse, enum val_prettyprint pretty) |
| 280 | { |
| 281 | if (!value_check_printable (val, stream)) |
| 282 | return 0; |
| 283 | |
| 284 | return val_print (value_type (val), value_contents_all (val), |
| 285 | value_embedded_offset (val), VALUE_ADDRESS (val), |
| 286 | stream, format, deref_ref, recurse, pretty); |
| 287 | } |
| 288 | |
| 289 | /* Print the value VAL in C-ish syntax on stream STREAM. |
| 290 | FORMAT is a format-letter, or 0 for print in natural format of data type. |
| 291 | If the object printed is a string pointer, returns |
| 292 | the number of string bytes printed. */ |
| 293 | |
| 294 | int |
| 295 | value_print (struct value *val, struct ui_file *stream, int format, |
| 296 | enum val_prettyprint pretty) |
| 297 | { |
| 298 | if (!value_check_printable (val, stream)) |
| 299 | return 0; |
| 300 | |
| 301 | return LA_VALUE_PRINT (val, stream, format, pretty); |
| 302 | } |
| 303 | |
| 304 | /* Called by various <lang>_val_print routines to print |
| 305 | TYPE_CODE_INT's. TYPE is the type. VALADDR is the address of the |
| 306 | value. STREAM is where to print the value. */ |
| 307 | |
| 308 | void |
| 309 | val_print_type_code_int (struct type *type, const gdb_byte *valaddr, |
| 310 | struct ui_file *stream) |
| 311 | { |
| 312 | if (TYPE_LENGTH (type) > sizeof (LONGEST)) |
| 313 | { |
| 314 | LONGEST val; |
| 315 | |
| 316 | if (TYPE_UNSIGNED (type) |
| 317 | && extract_long_unsigned_integer (valaddr, TYPE_LENGTH (type), |
| 318 | &val)) |
| 319 | { |
| 320 | print_longest (stream, 'u', 0, val); |
| 321 | } |
| 322 | else |
| 323 | { |
| 324 | /* Signed, or we couldn't turn an unsigned value into a |
| 325 | LONGEST. For signed values, one could assume two's |
| 326 | complement (a reasonable assumption, I think) and do |
| 327 | better than this. */ |
| 328 | print_hex_chars (stream, (unsigned char *) valaddr, |
| 329 | TYPE_LENGTH (type)); |
| 330 | } |
| 331 | } |
| 332 | else |
| 333 | { |
| 334 | print_longest (stream, TYPE_UNSIGNED (type) ? 'u' : 'd', 0, |
| 335 | unpack_long (type, valaddr)); |
| 336 | } |
| 337 | } |
| 338 | |
| 339 | void |
| 340 | val_print_type_code_flags (struct type *type, const gdb_byte *valaddr, |
| 341 | struct ui_file *stream) |
| 342 | { |
| 343 | ULONGEST val = unpack_long (type, valaddr); |
| 344 | int bitpos, nfields = TYPE_NFIELDS (type); |
| 345 | |
| 346 | fputs_filtered ("[ ", stream); |
| 347 | for (bitpos = 0; bitpos < nfields; bitpos++) |
| 348 | { |
| 349 | if (TYPE_FIELD_BITPOS (type, bitpos) != -1 |
| 350 | && (val & ((ULONGEST)1 << bitpos))) |
| 351 | { |
| 352 | if (TYPE_FIELD_NAME (type, bitpos)) |
| 353 | fprintf_filtered (stream, "%s ", TYPE_FIELD_NAME (type, bitpos)); |
| 354 | else |
| 355 | fprintf_filtered (stream, "#%d ", bitpos); |
| 356 | } |
| 357 | } |
| 358 | fputs_filtered ("]", stream); |
| 359 | } |
| 360 | |
| 361 | /* Print a number according to FORMAT which is one of d,u,x,o,b,h,w,g. |
| 362 | The raison d'etre of this function is to consolidate printing of |
| 363 | LONG_LONG's into this one function. The format chars b,h,w,g are |
| 364 | from print_scalar_formatted(). Numbers are printed using C |
| 365 | format. |
| 366 | |
| 367 | USE_C_FORMAT means to use C format in all cases. Without it, |
| 368 | 'o' and 'x' format do not include the standard C radix prefix |
| 369 | (leading 0 or 0x). |
| 370 | |
| 371 | Hilfinger/2004-09-09: USE_C_FORMAT was originally called USE_LOCAL |
| 372 | and was intended to request formating according to the current |
| 373 | language and would be used for most integers that GDB prints. The |
| 374 | exceptional cases were things like protocols where the format of |
| 375 | the integer is a protocol thing, not a user-visible thing). The |
| 376 | parameter remains to preserve the information of what things might |
| 377 | be printed with language-specific format, should we ever resurrect |
| 378 | that capability. */ |
| 379 | |
| 380 | void |
| 381 | print_longest (struct ui_file *stream, int format, int use_c_format, |
| 382 | LONGEST val_long) |
| 383 | { |
| 384 | const char *val; |
| 385 | |
| 386 | switch (format) |
| 387 | { |
| 388 | case 'd': |
| 389 | val = int_string (val_long, 10, 1, 0, 1); break; |
| 390 | case 'u': |
| 391 | val = int_string (val_long, 10, 0, 0, 1); break; |
| 392 | case 'x': |
| 393 | val = int_string (val_long, 16, 0, 0, use_c_format); break; |
| 394 | case 'b': |
| 395 | val = int_string (val_long, 16, 0, 2, 1); break; |
| 396 | case 'h': |
| 397 | val = int_string (val_long, 16, 0, 4, 1); break; |
| 398 | case 'w': |
| 399 | val = int_string (val_long, 16, 0, 8, 1); break; |
| 400 | case 'g': |
| 401 | val = int_string (val_long, 16, 0, 16, 1); break; |
| 402 | break; |
| 403 | case 'o': |
| 404 | val = int_string (val_long, 8, 0, 0, use_c_format); break; |
| 405 | default: |
| 406 | internal_error (__FILE__, __LINE__, _("failed internal consistency check")); |
| 407 | } |
| 408 | fputs_filtered (val, stream); |
| 409 | } |
| 410 | |
| 411 | /* This used to be a macro, but I don't think it is called often enough |
| 412 | to merit such treatment. */ |
| 413 | /* Convert a LONGEST to an int. This is used in contexts (e.g. number of |
| 414 | arguments to a function, number in a value history, register number, etc.) |
| 415 | where the value must not be larger than can fit in an int. */ |
| 416 | |
| 417 | int |
| 418 | longest_to_int (LONGEST arg) |
| 419 | { |
| 420 | /* Let the compiler do the work */ |
| 421 | int rtnval = (int) arg; |
| 422 | |
| 423 | /* Check for overflows or underflows */ |
| 424 | if (sizeof (LONGEST) > sizeof (int)) |
| 425 | { |
| 426 | if (rtnval != arg) |
| 427 | { |
| 428 | error (_("Value out of range.")); |
| 429 | } |
| 430 | } |
| 431 | return (rtnval); |
| 432 | } |
| 433 | |
| 434 | /* Print a floating point value of type TYPE (not always a |
| 435 | TYPE_CODE_FLT), pointed to in GDB by VALADDR, on STREAM. */ |
| 436 | |
| 437 | void |
| 438 | print_floating (const gdb_byte *valaddr, struct type *type, |
| 439 | struct ui_file *stream) |
| 440 | { |
| 441 | DOUBLEST doub; |
| 442 | int inv; |
| 443 | const struct floatformat *fmt = NULL; |
| 444 | unsigned len = TYPE_LENGTH (type); |
| 445 | enum float_kind kind; |
| 446 | |
| 447 | /* If it is a floating-point, check for obvious problems. */ |
| 448 | if (TYPE_CODE (type) == TYPE_CODE_FLT) |
| 449 | fmt = floatformat_from_type (type); |
| 450 | if (fmt != NULL) |
| 451 | { |
| 452 | kind = floatformat_classify (fmt, valaddr); |
| 453 | if (kind == float_nan) |
| 454 | { |
| 455 | if (floatformat_is_negative (fmt, valaddr)) |
| 456 | fprintf_filtered (stream, "-"); |
| 457 | fprintf_filtered (stream, "nan("); |
| 458 | fputs_filtered ("0x", stream); |
| 459 | fputs_filtered (floatformat_mantissa (fmt, valaddr), stream); |
| 460 | fprintf_filtered (stream, ")"); |
| 461 | return; |
| 462 | } |
| 463 | else if (kind == float_infinite) |
| 464 | { |
| 465 | if (floatformat_is_negative (fmt, valaddr)) |
| 466 | fputs_filtered ("-", stream); |
| 467 | fputs_filtered ("inf", stream); |
| 468 | return; |
| 469 | } |
| 470 | } |
| 471 | |
| 472 | /* NOTE: cagney/2002-01-15: The TYPE passed into print_floating() |
| 473 | isn't necessarily a TYPE_CODE_FLT. Consequently, unpack_double |
| 474 | needs to be used as that takes care of any necessary type |
| 475 | conversions. Such conversions are of course direct to DOUBLEST |
| 476 | and disregard any possible target floating point limitations. |
| 477 | For instance, a u64 would be converted and displayed exactly on a |
| 478 | host with 80 bit DOUBLEST but with loss of information on a host |
| 479 | with 64 bit DOUBLEST. */ |
| 480 | |
| 481 | doub = unpack_double (type, valaddr, &inv); |
| 482 | if (inv) |
| 483 | { |
| 484 | fprintf_filtered (stream, "<invalid float value>"); |
| 485 | return; |
| 486 | } |
| 487 | |
| 488 | /* FIXME: kettenis/2001-01-20: The following code makes too much |
| 489 | assumptions about the host and target floating point format. */ |
| 490 | |
| 491 | /* NOTE: cagney/2002-02-03: Since the TYPE of what was passed in may |
| 492 | not necessarily be a TYPE_CODE_FLT, the below ignores that and |
| 493 | instead uses the type's length to determine the precision of the |
| 494 | floating-point value being printed. */ |
| 495 | |
| 496 | if (len < sizeof (double)) |
| 497 | fprintf_filtered (stream, "%.9g", (double) doub); |
| 498 | else if (len == sizeof (double)) |
| 499 | fprintf_filtered (stream, "%.17g", (double) doub); |
| 500 | else |
| 501 | #ifdef PRINTF_HAS_LONG_DOUBLE |
| 502 | fprintf_filtered (stream, "%.35Lg", doub); |
| 503 | #else |
| 504 | /* This at least wins with values that are representable as |
| 505 | doubles. */ |
| 506 | fprintf_filtered (stream, "%.17g", (double) doub); |
| 507 | #endif |
| 508 | } |
| 509 | |
| 510 | void |
| 511 | print_binary_chars (struct ui_file *stream, const gdb_byte *valaddr, |
| 512 | unsigned len) |
| 513 | { |
| 514 | |
| 515 | #define BITS_IN_BYTES 8 |
| 516 | |
| 517 | const gdb_byte *p; |
| 518 | unsigned int i; |
| 519 | int b; |
| 520 | |
| 521 | /* Declared "int" so it will be signed. |
| 522 | * This ensures that right shift will shift in zeros. |
| 523 | */ |
| 524 | const int mask = 0x080; |
| 525 | |
| 526 | /* FIXME: We should be not printing leading zeroes in most cases. */ |
| 527 | |
| 528 | if (gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG) |
| 529 | { |
| 530 | for (p = valaddr; |
| 531 | p < valaddr + len; |
| 532 | p++) |
| 533 | { |
| 534 | /* Every byte has 8 binary characters; peel off |
| 535 | * and print from the MSB end. |
| 536 | */ |
| 537 | for (i = 0; i < (BITS_IN_BYTES * sizeof (*p)); i++) |
| 538 | { |
| 539 | if (*p & (mask >> i)) |
| 540 | b = 1; |
| 541 | else |
| 542 | b = 0; |
| 543 | |
| 544 | fprintf_filtered (stream, "%1d", b); |
| 545 | } |
| 546 | } |
| 547 | } |
| 548 | else |
| 549 | { |
| 550 | for (p = valaddr + len - 1; |
| 551 | p >= valaddr; |
| 552 | p--) |
| 553 | { |
| 554 | for (i = 0; i < (BITS_IN_BYTES * sizeof (*p)); i++) |
| 555 | { |
| 556 | if (*p & (mask >> i)) |
| 557 | b = 1; |
| 558 | else |
| 559 | b = 0; |
| 560 | |
| 561 | fprintf_filtered (stream, "%1d", b); |
| 562 | } |
| 563 | } |
| 564 | } |
| 565 | } |
| 566 | |
| 567 | /* VALADDR points to an integer of LEN bytes. |
| 568 | * Print it in octal on stream or format it in buf. |
| 569 | */ |
| 570 | void |
| 571 | print_octal_chars (struct ui_file *stream, const gdb_byte *valaddr, |
| 572 | unsigned len) |
| 573 | { |
| 574 | const gdb_byte *p; |
| 575 | unsigned char octa1, octa2, octa3, carry; |
| 576 | int cycle; |
| 577 | |
| 578 | /* FIXME: We should be not printing leading zeroes in most cases. */ |
| 579 | |
| 580 | |
| 581 | /* Octal is 3 bits, which doesn't fit. Yuk. So we have to track |
| 582 | * the extra bits, which cycle every three bytes: |
| 583 | * |
| 584 | * Byte side: 0 1 2 3 |
| 585 | * | | | | |
| 586 | * bit number 123 456 78 | 9 012 345 6 | 78 901 234 | 567 890 12 | |
| 587 | * |
| 588 | * Octal side: 0 1 carry 3 4 carry ... |
| 589 | * |
| 590 | * Cycle number: 0 1 2 |
| 591 | * |
| 592 | * But of course we are printing from the high side, so we have to |
| 593 | * figure out where in the cycle we are so that we end up with no |
| 594 | * left over bits at the end. |
| 595 | */ |
| 596 | #define BITS_IN_OCTAL 3 |
| 597 | #define HIGH_ZERO 0340 |
| 598 | #define LOW_ZERO 0016 |
| 599 | #define CARRY_ZERO 0003 |
| 600 | #define HIGH_ONE 0200 |
| 601 | #define MID_ONE 0160 |
| 602 | #define LOW_ONE 0016 |
| 603 | #define CARRY_ONE 0001 |
| 604 | #define HIGH_TWO 0300 |
| 605 | #define MID_TWO 0070 |
| 606 | #define LOW_TWO 0007 |
| 607 | |
| 608 | /* For 32 we start in cycle 2, with two bits and one bit carry; |
| 609 | * for 64 in cycle in cycle 1, with one bit and a two bit carry. |
| 610 | */ |
| 611 | cycle = (len * BITS_IN_BYTES) % BITS_IN_OCTAL; |
| 612 | carry = 0; |
| 613 | |
| 614 | fputs_filtered ("0", stream); |
| 615 | if (gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG) |
| 616 | { |
| 617 | for (p = valaddr; |
| 618 | p < valaddr + len; |
| 619 | p++) |
| 620 | { |
| 621 | switch (cycle) |
| 622 | { |
| 623 | case 0: |
| 624 | /* No carry in, carry out two bits. |
| 625 | */ |
| 626 | octa1 = (HIGH_ZERO & *p) >> 5; |
| 627 | octa2 = (LOW_ZERO & *p) >> 2; |
| 628 | carry = (CARRY_ZERO & *p); |
| 629 | fprintf_filtered (stream, "%o", octa1); |
| 630 | fprintf_filtered (stream, "%o", octa2); |
| 631 | break; |
| 632 | |
| 633 | case 1: |
| 634 | /* Carry in two bits, carry out one bit. |
| 635 | */ |
| 636 | octa1 = (carry << 1) | ((HIGH_ONE & *p) >> 7); |
| 637 | octa2 = (MID_ONE & *p) >> 4; |
| 638 | octa3 = (LOW_ONE & *p) >> 1; |
| 639 | carry = (CARRY_ONE & *p); |
| 640 | fprintf_filtered (stream, "%o", octa1); |
| 641 | fprintf_filtered (stream, "%o", octa2); |
| 642 | fprintf_filtered (stream, "%o", octa3); |
| 643 | break; |
| 644 | |
| 645 | case 2: |
| 646 | /* Carry in one bit, no carry out. |
| 647 | */ |
| 648 | octa1 = (carry << 2) | ((HIGH_TWO & *p) >> 6); |
| 649 | octa2 = (MID_TWO & *p) >> 3; |
| 650 | octa3 = (LOW_TWO & *p); |
| 651 | carry = 0; |
| 652 | fprintf_filtered (stream, "%o", octa1); |
| 653 | fprintf_filtered (stream, "%o", octa2); |
| 654 | fprintf_filtered (stream, "%o", octa3); |
| 655 | break; |
| 656 | |
| 657 | default: |
| 658 | error (_("Internal error in octal conversion;")); |
| 659 | } |
| 660 | |
| 661 | cycle++; |
| 662 | cycle = cycle % BITS_IN_OCTAL; |
| 663 | } |
| 664 | } |
| 665 | else |
| 666 | { |
| 667 | for (p = valaddr + len - 1; |
| 668 | p >= valaddr; |
| 669 | p--) |
| 670 | { |
| 671 | switch (cycle) |
| 672 | { |
| 673 | case 0: |
| 674 | /* Carry out, no carry in */ |
| 675 | octa1 = (HIGH_ZERO & *p) >> 5; |
| 676 | octa2 = (LOW_ZERO & *p) >> 2; |
| 677 | carry = (CARRY_ZERO & *p); |
| 678 | fprintf_filtered (stream, "%o", octa1); |
| 679 | fprintf_filtered (stream, "%o", octa2); |
| 680 | break; |
| 681 | |
| 682 | case 1: |
| 683 | /* Carry in, carry out */ |
| 684 | octa1 = (carry << 1) | ((HIGH_ONE & *p) >> 7); |
| 685 | octa2 = (MID_ONE & *p) >> 4; |
| 686 | octa3 = (LOW_ONE & *p) >> 1; |
| 687 | carry = (CARRY_ONE & *p); |
| 688 | fprintf_filtered (stream, "%o", octa1); |
| 689 | fprintf_filtered (stream, "%o", octa2); |
| 690 | fprintf_filtered (stream, "%o", octa3); |
| 691 | break; |
| 692 | |
| 693 | case 2: |
| 694 | /* Carry in, no carry out */ |
| 695 | octa1 = (carry << 2) | ((HIGH_TWO & *p) >> 6); |
| 696 | octa2 = (MID_TWO & *p) >> 3; |
| 697 | octa3 = (LOW_TWO & *p); |
| 698 | carry = 0; |
| 699 | fprintf_filtered (stream, "%o", octa1); |
| 700 | fprintf_filtered (stream, "%o", octa2); |
| 701 | fprintf_filtered (stream, "%o", octa3); |
| 702 | break; |
| 703 | |
| 704 | default: |
| 705 | error (_("Internal error in octal conversion;")); |
| 706 | } |
| 707 | |
| 708 | cycle++; |
| 709 | cycle = cycle % BITS_IN_OCTAL; |
| 710 | } |
| 711 | } |
| 712 | |
| 713 | } |
| 714 | |
| 715 | /* VALADDR points to an integer of LEN bytes. |
| 716 | * Print it in decimal on stream or format it in buf. |
| 717 | */ |
| 718 | void |
| 719 | print_decimal_chars (struct ui_file *stream, const gdb_byte *valaddr, |
| 720 | unsigned len) |
| 721 | { |
| 722 | #define TEN 10 |
| 723 | #define TWO_TO_FOURTH 16 |
| 724 | #define CARRY_OUT( x ) ((x) / TEN) /* extend char to int */ |
| 725 | #define CARRY_LEFT( x ) ((x) % TEN) |
| 726 | #define SHIFT( x ) ((x) << 4) |
| 727 | #define START_P \ |
| 728 | ((gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG) ? valaddr : valaddr + len - 1) |
| 729 | #define NOT_END_P \ |
| 730 | ((gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG) ? (p < valaddr + len) : (p >= valaddr)) |
| 731 | #define NEXT_P \ |
| 732 | ((gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG) ? p++ : p-- ) |
| 733 | #define LOW_NIBBLE( x ) ( (x) & 0x00F) |
| 734 | #define HIGH_NIBBLE( x ) (((x) & 0x0F0) >> 4) |
| 735 | |
| 736 | const gdb_byte *p; |
| 737 | unsigned char *digits; |
| 738 | int carry; |
| 739 | int decimal_len; |
| 740 | int i, j, decimal_digits; |
| 741 | int dummy; |
| 742 | int flip; |
| 743 | |
| 744 | /* Base-ten number is less than twice as many digits |
| 745 | * as the base 16 number, which is 2 digits per byte. |
| 746 | */ |
| 747 | decimal_len = len * 2 * 2; |
| 748 | digits = xmalloc (decimal_len); |
| 749 | |
| 750 | for (i = 0; i < decimal_len; i++) |
| 751 | { |
| 752 | digits[i] = 0; |
| 753 | } |
| 754 | |
| 755 | /* Ok, we have an unknown number of bytes of data to be printed in |
| 756 | * decimal. |
| 757 | * |
| 758 | * Given a hex number (in nibbles) as XYZ, we start by taking X and |
| 759 | * decemalizing it as "x1 x2" in two decimal nibbles. Then we multiply |
| 760 | * the nibbles by 16, add Y and re-decimalize. Repeat with Z. |
| 761 | * |
| 762 | * The trick is that "digits" holds a base-10 number, but sometimes |
| 763 | * the individual digits are > 10. |
| 764 | * |
| 765 | * Outer loop is per nibble (hex digit) of input, from MSD end to |
| 766 | * LSD end. |
| 767 | */ |
| 768 | decimal_digits = 0; /* Number of decimal digits so far */ |
| 769 | p = START_P; |
| 770 | flip = 0; |
| 771 | while (NOT_END_P) |
| 772 | { |
| 773 | /* |
| 774 | * Multiply current base-ten number by 16 in place. |
| 775 | * Each digit was between 0 and 9, now is between |
| 776 | * 0 and 144. |
| 777 | */ |
| 778 | for (j = 0; j < decimal_digits; j++) |
| 779 | { |
| 780 | digits[j] = SHIFT (digits[j]); |
| 781 | } |
| 782 | |
| 783 | /* Take the next nibble off the input and add it to what |
| 784 | * we've got in the LSB position. Bottom 'digit' is now |
| 785 | * between 0 and 159. |
| 786 | * |
| 787 | * "flip" is used to run this loop twice for each byte. |
| 788 | */ |
| 789 | if (flip == 0) |
| 790 | { |
| 791 | /* Take top nibble. |
| 792 | */ |
| 793 | digits[0] += HIGH_NIBBLE (*p); |
| 794 | flip = 1; |
| 795 | } |
| 796 | else |
| 797 | { |
| 798 | /* Take low nibble and bump our pointer "p". |
| 799 | */ |
| 800 | digits[0] += LOW_NIBBLE (*p); |
| 801 | NEXT_P; |
| 802 | flip = 0; |
| 803 | } |
| 804 | |
| 805 | /* Re-decimalize. We have to do this often enough |
| 806 | * that we don't overflow, but once per nibble is |
| 807 | * overkill. Easier this way, though. Note that the |
| 808 | * carry is often larger than 10 (e.g. max initial |
| 809 | * carry out of lowest nibble is 15, could bubble all |
| 810 | * the way up greater than 10). So we have to do |
| 811 | * the carrying beyond the last current digit. |
| 812 | */ |
| 813 | carry = 0; |
| 814 | for (j = 0; j < decimal_len - 1; j++) |
| 815 | { |
| 816 | digits[j] += carry; |
| 817 | |
| 818 | /* "/" won't handle an unsigned char with |
| 819 | * a value that if signed would be negative. |
| 820 | * So extend to longword int via "dummy". |
| 821 | */ |
| 822 | dummy = digits[j]; |
| 823 | carry = CARRY_OUT (dummy); |
| 824 | digits[j] = CARRY_LEFT (dummy); |
| 825 | |
| 826 | if (j >= decimal_digits && carry == 0) |
| 827 | { |
| 828 | /* |
| 829 | * All higher digits are 0 and we |
| 830 | * no longer have a carry. |
| 831 | * |
| 832 | * Note: "j" is 0-based, "decimal_digits" is |
| 833 | * 1-based. |
| 834 | */ |
| 835 | decimal_digits = j + 1; |
| 836 | break; |
| 837 | } |
| 838 | } |
| 839 | } |
| 840 | |
| 841 | /* Ok, now "digits" is the decimal representation, with |
| 842 | * the "decimal_digits" actual digits. Print! |
| 843 | */ |
| 844 | for (i = decimal_digits - 1; i >= 0; i--) |
| 845 | { |
| 846 | fprintf_filtered (stream, "%1d", digits[i]); |
| 847 | } |
| 848 | xfree (digits); |
| 849 | } |
| 850 | |
| 851 | /* VALADDR points to an integer of LEN bytes. Print it in hex on stream. */ |
| 852 | |
| 853 | void |
| 854 | print_hex_chars (struct ui_file *stream, const gdb_byte *valaddr, |
| 855 | unsigned len) |
| 856 | { |
| 857 | const gdb_byte *p; |
| 858 | |
| 859 | /* FIXME: We should be not printing leading zeroes in most cases. */ |
| 860 | |
| 861 | fputs_filtered ("0x", stream); |
| 862 | if (gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG) |
| 863 | { |
| 864 | for (p = valaddr; |
| 865 | p < valaddr + len; |
| 866 | p++) |
| 867 | { |
| 868 | fprintf_filtered (stream, "%02x", *p); |
| 869 | } |
| 870 | } |
| 871 | else |
| 872 | { |
| 873 | for (p = valaddr + len - 1; |
| 874 | p >= valaddr; |
| 875 | p--) |
| 876 | { |
| 877 | fprintf_filtered (stream, "%02x", *p); |
| 878 | } |
| 879 | } |
| 880 | } |
| 881 | |
| 882 | /* VALADDR points to a char integer of LEN bytes. Print it out in appropriate language form on stream. |
| 883 | Omit any leading zero chars. */ |
| 884 | |
| 885 | void |
| 886 | print_char_chars (struct ui_file *stream, const gdb_byte *valaddr, |
| 887 | unsigned len) |
| 888 | { |
| 889 | const gdb_byte *p; |
| 890 | |
| 891 | if (gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG) |
| 892 | { |
| 893 | p = valaddr; |
| 894 | while (p < valaddr + len - 1 && *p == 0) |
| 895 | ++p; |
| 896 | |
| 897 | while (p < valaddr + len) |
| 898 | { |
| 899 | LA_EMIT_CHAR (*p, stream, '\''); |
| 900 | ++p; |
| 901 | } |
| 902 | } |
| 903 | else |
| 904 | { |
| 905 | p = valaddr + len - 1; |
| 906 | while (p > valaddr && *p == 0) |
| 907 | --p; |
| 908 | |
| 909 | while (p >= valaddr) |
| 910 | { |
| 911 | LA_EMIT_CHAR (*p, stream, '\''); |
| 912 | --p; |
| 913 | } |
| 914 | } |
| 915 | } |
| 916 | |
| 917 | /* Return non-zero if the debugger should print the index of each element |
| 918 | when printing array values. */ |
| 919 | |
| 920 | int |
| 921 | print_array_indexes_p (void) |
| 922 | { |
| 923 | return print_array_indexes; |
| 924 | } |
| 925 | |
| 926 | /* Assuming TYPE is a simple, non-empty array type, compute its lower bound. |
| 927 | Save it into LOW_BOUND if not NULL. |
| 928 | |
| 929 | Return 1 if the operation was successful. Return zero otherwise, |
| 930 | in which case the value of LOW_BOUND is unmodified. |
| 931 | |
| 932 | Computing the array lower bound is pretty easy, but this function |
| 933 | does some additional verifications before returning the low bound. |
| 934 | If something incorrect is detected, it is better to return a status |
| 935 | rather than throwing an error, making it easier for the caller to |
| 936 | implement an error-recovery plan. For instance, it may decide to |
| 937 | warn the user that the bound was not found and then use a default |
| 938 | value instead. */ |
| 939 | |
| 940 | int |
| 941 | get_array_low_bound (struct type *type, long *low_bound) |
| 942 | { |
| 943 | struct type *index = TYPE_INDEX_TYPE (type); |
| 944 | long low = 0; |
| 945 | |
| 946 | if (index == NULL) |
| 947 | return 0; |
| 948 | |
| 949 | if (TYPE_CODE (index) != TYPE_CODE_RANGE |
| 950 | && TYPE_CODE (index) != TYPE_CODE_ENUM) |
| 951 | return 0; |
| 952 | |
| 953 | low = TYPE_LOW_BOUND (index); |
| 954 | if (low > TYPE_HIGH_BOUND (index)) |
| 955 | return 0; |
| 956 | |
| 957 | if (low_bound) |
| 958 | *low_bound = low; |
| 959 | |
| 960 | return 1; |
| 961 | } |
| 962 | |
| 963 | /* Print on STREAM using the given FORMAT the index for the element |
| 964 | at INDEX of an array whose index type is INDEX_TYPE. */ |
| 965 | |
| 966 | void |
| 967 | maybe_print_array_index (struct type *index_type, LONGEST index, |
| 968 | struct ui_file *stream, int format, |
| 969 | enum val_prettyprint pretty) |
| 970 | { |
| 971 | struct value *index_value; |
| 972 | |
| 973 | if (!print_array_indexes) |
| 974 | return; |
| 975 | |
| 976 | index_value = value_from_longest (index_type, index); |
| 977 | |
| 978 | LA_PRINT_ARRAY_INDEX (index_value, stream, format, pretty); |
| 979 | } |
| 980 | |
| 981 | /* Called by various <lang>_val_print routines to print elements of an |
| 982 | array in the form "<elem1>, <elem2>, <elem3>, ...". |
| 983 | |
| 984 | (FIXME?) Assumes array element separator is a comma, which is correct |
| 985 | for all languages currently handled. |
| 986 | (FIXME?) Some languages have a notation for repeated array elements, |
| 987 | perhaps we should try to use that notation when appropriate. |
| 988 | */ |
| 989 | |
| 990 | void |
| 991 | val_print_array_elements (struct type *type, const gdb_byte *valaddr, |
| 992 | CORE_ADDR address, struct ui_file *stream, |
| 993 | int format, int deref_ref, |
| 994 | int recurse, enum val_prettyprint pretty, |
| 995 | unsigned int i) |
| 996 | { |
| 997 | unsigned int things_printed = 0; |
| 998 | unsigned len; |
| 999 | struct type *elttype, *index_type; |
| 1000 | unsigned eltlen; |
| 1001 | /* Position of the array element we are examining to see |
| 1002 | whether it is repeated. */ |
| 1003 | unsigned int rep1; |
| 1004 | /* Number of repetitions we have detected so far. */ |
| 1005 | unsigned int reps; |
| 1006 | long low_bound_index = 0; |
| 1007 | |
| 1008 | elttype = TYPE_TARGET_TYPE (type); |
| 1009 | eltlen = TYPE_LENGTH (check_typedef (elttype)); |
| 1010 | len = TYPE_LENGTH (type) / eltlen; |
| 1011 | index_type = TYPE_INDEX_TYPE (type); |
| 1012 | |
| 1013 | /* Get the array low bound. This only makes sense if the array |
| 1014 | has one or more element in it. */ |
| 1015 | if (len > 0 && !get_array_low_bound (type, &low_bound_index)) |
| 1016 | { |
| 1017 | warning ("unable to get low bound of array, using zero as default"); |
| 1018 | low_bound_index = 0; |
| 1019 | } |
| 1020 | |
| 1021 | annotate_array_section_begin (i, elttype); |
| 1022 | |
| 1023 | for (; i < len && things_printed < print_max; i++) |
| 1024 | { |
| 1025 | if (i != 0) |
| 1026 | { |
| 1027 | if (prettyprint_arrays) |
| 1028 | { |
| 1029 | fprintf_filtered (stream, ",\n"); |
| 1030 | print_spaces_filtered (2 + 2 * recurse, stream); |
| 1031 | } |
| 1032 | else |
| 1033 | { |
| 1034 | fprintf_filtered (stream, ", "); |
| 1035 | } |
| 1036 | } |
| 1037 | wrap_here (n_spaces (2 + 2 * recurse)); |
| 1038 | maybe_print_array_index (index_type, i + low_bound_index, |
| 1039 | stream, format, pretty); |
| 1040 | |
| 1041 | rep1 = i + 1; |
| 1042 | reps = 1; |
| 1043 | while ((rep1 < len) && |
| 1044 | !memcmp (valaddr + i * eltlen, valaddr + rep1 * eltlen, eltlen)) |
| 1045 | { |
| 1046 | ++reps; |
| 1047 | ++rep1; |
| 1048 | } |
| 1049 | |
| 1050 | if (reps > repeat_count_threshold) |
| 1051 | { |
| 1052 | val_print (elttype, valaddr + i * eltlen, 0, 0, stream, format, |
| 1053 | deref_ref, recurse + 1, pretty); |
| 1054 | annotate_elt_rep (reps); |
| 1055 | fprintf_filtered (stream, " <repeats %u times>", reps); |
| 1056 | annotate_elt_rep_end (); |
| 1057 | |
| 1058 | i = rep1 - 1; |
| 1059 | things_printed += repeat_count_threshold; |
| 1060 | } |
| 1061 | else |
| 1062 | { |
| 1063 | val_print (elttype, valaddr + i * eltlen, 0, 0, stream, format, |
| 1064 | deref_ref, recurse + 1, pretty); |
| 1065 | annotate_elt (); |
| 1066 | things_printed++; |
| 1067 | } |
| 1068 | } |
| 1069 | annotate_array_section_end (); |
| 1070 | if (i < len) |
| 1071 | { |
| 1072 | fprintf_filtered (stream, "..."); |
| 1073 | } |
| 1074 | } |
| 1075 | |
| 1076 | /* Read LEN bytes of target memory at address MEMADDR, placing the |
| 1077 | results in GDB's memory at MYADDR. Returns a count of the bytes |
| 1078 | actually read, and optionally an errno value in the location |
| 1079 | pointed to by ERRNOPTR if ERRNOPTR is non-null. */ |
| 1080 | |
| 1081 | /* FIXME: cagney/1999-10-14: Only used by val_print_string. Can this |
| 1082 | function be eliminated. */ |
| 1083 | |
| 1084 | static int |
| 1085 | partial_memory_read (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int *errnoptr) |
| 1086 | { |
| 1087 | int nread; /* Number of bytes actually read. */ |
| 1088 | int errcode; /* Error from last read. */ |
| 1089 | |
| 1090 | /* First try a complete read. */ |
| 1091 | errcode = target_read_memory (memaddr, myaddr, len); |
| 1092 | if (errcode == 0) |
| 1093 | { |
| 1094 | /* Got it all. */ |
| 1095 | nread = len; |
| 1096 | } |
| 1097 | else |
| 1098 | { |
| 1099 | /* Loop, reading one byte at a time until we get as much as we can. */ |
| 1100 | for (errcode = 0, nread = 0; len > 0 && errcode == 0; nread++, len--) |
| 1101 | { |
| 1102 | errcode = target_read_memory (memaddr++, myaddr++, 1); |
| 1103 | } |
| 1104 | /* If an error, the last read was unsuccessful, so adjust count. */ |
| 1105 | if (errcode != 0) |
| 1106 | { |
| 1107 | nread--; |
| 1108 | } |
| 1109 | } |
| 1110 | if (errnoptr != NULL) |
| 1111 | { |
| 1112 | *errnoptr = errcode; |
| 1113 | } |
| 1114 | return (nread); |
| 1115 | } |
| 1116 | |
| 1117 | /* Print a string from the inferior, starting at ADDR and printing up to LEN |
| 1118 | characters, of WIDTH bytes a piece, to STREAM. If LEN is -1, printing |
| 1119 | stops at the first null byte, otherwise printing proceeds (including null |
| 1120 | bytes) until either print_max or LEN characters have been printed, |
| 1121 | whichever is smaller. */ |
| 1122 | |
| 1123 | /* FIXME: Use target_read_string. */ |
| 1124 | |
| 1125 | int |
| 1126 | val_print_string (CORE_ADDR addr, int len, int width, struct ui_file *stream) |
| 1127 | { |
| 1128 | int force_ellipsis = 0; /* Force ellipsis to be printed if nonzero. */ |
| 1129 | int errcode; /* Errno returned from bad reads. */ |
| 1130 | unsigned int fetchlimit; /* Maximum number of chars to print. */ |
| 1131 | unsigned int nfetch; /* Chars to fetch / chars fetched. */ |
| 1132 | unsigned int chunksize; /* Size of each fetch, in chars. */ |
| 1133 | gdb_byte *buffer = NULL; /* Dynamically growable fetch buffer. */ |
| 1134 | gdb_byte *bufptr; /* Pointer to next available byte in buffer. */ |
| 1135 | gdb_byte *limit; /* First location past end of fetch buffer. */ |
| 1136 | struct cleanup *old_chain = NULL; /* Top of the old cleanup chain. */ |
| 1137 | int found_nul; /* Non-zero if we found the nul char */ |
| 1138 | |
| 1139 | /* First we need to figure out the limit on the number of characters we are |
| 1140 | going to attempt to fetch and print. This is actually pretty simple. If |
| 1141 | LEN >= zero, then the limit is the minimum of LEN and print_max. If |
| 1142 | LEN is -1, then the limit is print_max. This is true regardless of |
| 1143 | whether print_max is zero, UINT_MAX (unlimited), or something in between, |
| 1144 | because finding the null byte (or available memory) is what actually |
| 1145 | limits the fetch. */ |
| 1146 | |
| 1147 | fetchlimit = (len == -1 ? print_max : min (len, print_max)); |
| 1148 | |
| 1149 | /* Now decide how large of chunks to try to read in one operation. This |
| 1150 | is also pretty simple. If LEN >= zero, then we want fetchlimit chars, |
| 1151 | so we might as well read them all in one operation. If LEN is -1, we |
| 1152 | are looking for a null terminator to end the fetching, so we might as |
| 1153 | well read in blocks that are large enough to be efficient, but not so |
| 1154 | large as to be slow if fetchlimit happens to be large. So we choose the |
| 1155 | minimum of 8 and fetchlimit. We used to use 200 instead of 8 but |
| 1156 | 200 is way too big for remote debugging over a serial line. */ |
| 1157 | |
| 1158 | chunksize = (len == -1 ? min (8, fetchlimit) : fetchlimit); |
| 1159 | |
| 1160 | /* Loop until we either have all the characters to print, or we encounter |
| 1161 | some error, such as bumping into the end of the address space. */ |
| 1162 | |
| 1163 | found_nul = 0; |
| 1164 | old_chain = make_cleanup (null_cleanup, 0); |
| 1165 | |
| 1166 | if (len > 0) |
| 1167 | { |
| 1168 | buffer = (gdb_byte *) xmalloc (len * width); |
| 1169 | bufptr = buffer; |
| 1170 | old_chain = make_cleanup (xfree, buffer); |
| 1171 | |
| 1172 | nfetch = partial_memory_read (addr, bufptr, len * width, &errcode) |
| 1173 | / width; |
| 1174 | addr += nfetch * width; |
| 1175 | bufptr += nfetch * width; |
| 1176 | } |
| 1177 | else if (len == -1) |
| 1178 | { |
| 1179 | unsigned long bufsize = 0; |
| 1180 | do |
| 1181 | { |
| 1182 | QUIT; |
| 1183 | nfetch = min (chunksize, fetchlimit - bufsize); |
| 1184 | |
| 1185 | if (buffer == NULL) |
| 1186 | buffer = (gdb_byte *) xmalloc (nfetch * width); |
| 1187 | else |
| 1188 | { |
| 1189 | discard_cleanups (old_chain); |
| 1190 | buffer = (gdb_byte *) xrealloc (buffer, (nfetch + bufsize) * width); |
| 1191 | } |
| 1192 | |
| 1193 | old_chain = make_cleanup (xfree, buffer); |
| 1194 | bufptr = buffer + bufsize * width; |
| 1195 | bufsize += nfetch; |
| 1196 | |
| 1197 | /* Read as much as we can. */ |
| 1198 | nfetch = partial_memory_read (addr, bufptr, nfetch * width, &errcode) |
| 1199 | / width; |
| 1200 | |
| 1201 | /* Scan this chunk for the null byte that terminates the string |
| 1202 | to print. If found, we don't need to fetch any more. Note |
| 1203 | that bufptr is explicitly left pointing at the next character |
| 1204 | after the null byte, or at the next character after the end of |
| 1205 | the buffer. */ |
| 1206 | |
| 1207 | limit = bufptr + nfetch * width; |
| 1208 | while (bufptr < limit) |
| 1209 | { |
| 1210 | unsigned long c; |
| 1211 | |
| 1212 | c = extract_unsigned_integer (bufptr, width); |
| 1213 | addr += width; |
| 1214 | bufptr += width; |
| 1215 | if (c == 0) |
| 1216 | { |
| 1217 | /* We don't care about any error which happened after |
| 1218 | the NULL terminator. */ |
| 1219 | errcode = 0; |
| 1220 | found_nul = 1; |
| 1221 | break; |
| 1222 | } |
| 1223 | } |
| 1224 | } |
| 1225 | while (errcode == 0 /* no error */ |
| 1226 | && bufptr - buffer < fetchlimit * width /* no overrun */ |
| 1227 | && !found_nul); /* haven't found nul yet */ |
| 1228 | } |
| 1229 | else |
| 1230 | { /* length of string is really 0! */ |
| 1231 | buffer = bufptr = NULL; |
| 1232 | errcode = 0; |
| 1233 | } |
| 1234 | |
| 1235 | /* bufptr and addr now point immediately beyond the last byte which we |
| 1236 | consider part of the string (including a '\0' which ends the string). */ |
| 1237 | |
| 1238 | /* We now have either successfully filled the buffer to fetchlimit, or |
| 1239 | terminated early due to an error or finding a null char when LEN is -1. */ |
| 1240 | |
| 1241 | if (len == -1 && !found_nul) |
| 1242 | { |
| 1243 | gdb_byte *peekbuf; |
| 1244 | |
| 1245 | /* We didn't find a null terminator we were looking for. Attempt |
| 1246 | to peek at the next character. If not successful, or it is not |
| 1247 | a null byte, then force ellipsis to be printed. */ |
| 1248 | |
| 1249 | peekbuf = (gdb_byte *) alloca (width); |
| 1250 | |
| 1251 | if (target_read_memory (addr, peekbuf, width) == 0 |
| 1252 | && extract_unsigned_integer (peekbuf, width) != 0) |
| 1253 | force_ellipsis = 1; |
| 1254 | } |
| 1255 | else if ((len >= 0 && errcode != 0) || (len > (bufptr - buffer) / width)) |
| 1256 | { |
| 1257 | /* Getting an error when we have a requested length, or fetching less |
| 1258 | than the number of characters actually requested, always make us |
| 1259 | print ellipsis. */ |
| 1260 | force_ellipsis = 1; |
| 1261 | } |
| 1262 | |
| 1263 | QUIT; |
| 1264 | |
| 1265 | /* If we get an error before fetching anything, don't print a string. |
| 1266 | But if we fetch something and then get an error, print the string |
| 1267 | and then the error message. */ |
| 1268 | if (errcode == 0 || bufptr > buffer) |
| 1269 | { |
| 1270 | if (addressprint) |
| 1271 | { |
| 1272 | fputs_filtered (" ", stream); |
| 1273 | } |
| 1274 | LA_PRINT_STRING (stream, buffer, (bufptr - buffer) / width, width, force_ellipsis); |
| 1275 | } |
| 1276 | |
| 1277 | if (errcode != 0) |
| 1278 | { |
| 1279 | if (errcode == EIO) |
| 1280 | { |
| 1281 | fprintf_filtered (stream, " <Address "); |
| 1282 | deprecated_print_address_numeric (addr, 1, stream); |
| 1283 | fprintf_filtered (stream, " out of bounds>"); |
| 1284 | } |
| 1285 | else |
| 1286 | { |
| 1287 | fprintf_filtered (stream, " <Error reading address "); |
| 1288 | deprecated_print_address_numeric (addr, 1, stream); |
| 1289 | fprintf_filtered (stream, ": %s>", safe_strerror (errcode)); |
| 1290 | } |
| 1291 | } |
| 1292 | gdb_flush (stream); |
| 1293 | do_cleanups (old_chain); |
| 1294 | return ((bufptr - buffer) / width); |
| 1295 | } |
| 1296 | \f |
| 1297 | |
| 1298 | /* Validate an input or output radix setting, and make sure the user |
| 1299 | knows what they really did here. Radix setting is confusing, e.g. |
| 1300 | setting the input radix to "10" never changes it! */ |
| 1301 | |
| 1302 | static void |
| 1303 | set_input_radix (char *args, int from_tty, struct cmd_list_element *c) |
| 1304 | { |
| 1305 | set_input_radix_1 (from_tty, input_radix); |
| 1306 | } |
| 1307 | |
| 1308 | static void |
| 1309 | set_input_radix_1 (int from_tty, unsigned radix) |
| 1310 | { |
| 1311 | /* We don't currently disallow any input radix except 0 or 1, which don't |
| 1312 | make any mathematical sense. In theory, we can deal with any input |
| 1313 | radix greater than 1, even if we don't have unique digits for every |
| 1314 | value from 0 to radix-1, but in practice we lose on large radix values. |
| 1315 | We should either fix the lossage or restrict the radix range more. |
| 1316 | (FIXME). */ |
| 1317 | |
| 1318 | if (radix < 2) |
| 1319 | { |
| 1320 | /* FIXME: cagney/2002-03-17: This needs to revert the bad radix |
| 1321 | value. */ |
| 1322 | error (_("Nonsense input radix ``decimal %u''; input radix unchanged."), |
| 1323 | radix); |
| 1324 | } |
| 1325 | input_radix = radix; |
| 1326 | if (from_tty) |
| 1327 | { |
| 1328 | printf_filtered (_("Input radix now set to decimal %u, hex %x, octal %o.\n"), |
| 1329 | radix, radix, radix); |
| 1330 | } |
| 1331 | } |
| 1332 | |
| 1333 | static void |
| 1334 | set_output_radix (char *args, int from_tty, struct cmd_list_element *c) |
| 1335 | { |
| 1336 | set_output_radix_1 (from_tty, output_radix); |
| 1337 | } |
| 1338 | |
| 1339 | static void |
| 1340 | set_output_radix_1 (int from_tty, unsigned radix) |
| 1341 | { |
| 1342 | /* Validate the radix and disallow ones that we aren't prepared to |
| 1343 | handle correctly, leaving the radix unchanged. */ |
| 1344 | switch (radix) |
| 1345 | { |
| 1346 | case 16: |
| 1347 | output_format = 'x'; /* hex */ |
| 1348 | break; |
| 1349 | case 10: |
| 1350 | output_format = 0; /* decimal */ |
| 1351 | break; |
| 1352 | case 8: |
| 1353 | output_format = 'o'; /* octal */ |
| 1354 | break; |
| 1355 | default: |
| 1356 | /* FIXME: cagney/2002-03-17: This needs to revert the bad radix |
| 1357 | value. */ |
| 1358 | error (_("Unsupported output radix ``decimal %u''; output radix unchanged."), |
| 1359 | radix); |
| 1360 | } |
| 1361 | output_radix = radix; |
| 1362 | if (from_tty) |
| 1363 | { |
| 1364 | printf_filtered (_("Output radix now set to decimal %u, hex %x, octal %o.\n"), |
| 1365 | radix, radix, radix); |
| 1366 | } |
| 1367 | } |
| 1368 | |
| 1369 | /* Set both the input and output radix at once. Try to set the output radix |
| 1370 | first, since it has the most restrictive range. An radix that is valid as |
| 1371 | an output radix is also valid as an input radix. |
| 1372 | |
| 1373 | It may be useful to have an unusual input radix. If the user wishes to |
| 1374 | set an input radix that is not valid as an output radix, he needs to use |
| 1375 | the 'set input-radix' command. */ |
| 1376 | |
| 1377 | static void |
| 1378 | set_radix (char *arg, int from_tty) |
| 1379 | { |
| 1380 | unsigned radix; |
| 1381 | |
| 1382 | radix = (arg == NULL) ? 10 : parse_and_eval_long (arg); |
| 1383 | set_output_radix_1 (0, radix); |
| 1384 | set_input_radix_1 (0, radix); |
| 1385 | if (from_tty) |
| 1386 | { |
| 1387 | printf_filtered (_("Input and output radices now set to decimal %u, hex %x, octal %o.\n"), |
| 1388 | radix, radix, radix); |
| 1389 | } |
| 1390 | } |
| 1391 | |
| 1392 | /* Show both the input and output radices. */ |
| 1393 | |
| 1394 | static void |
| 1395 | show_radix (char *arg, int from_tty) |
| 1396 | { |
| 1397 | if (from_tty) |
| 1398 | { |
| 1399 | if (input_radix == output_radix) |
| 1400 | { |
| 1401 | printf_filtered (_("Input and output radices set to decimal %u, hex %x, octal %o.\n"), |
| 1402 | input_radix, input_radix, input_radix); |
| 1403 | } |
| 1404 | else |
| 1405 | { |
| 1406 | printf_filtered (_("Input radix set to decimal %u, hex %x, octal %o.\n"), |
| 1407 | input_radix, input_radix, input_radix); |
| 1408 | printf_filtered (_("Output radix set to decimal %u, hex %x, octal %o.\n"), |
| 1409 | output_radix, output_radix, output_radix); |
| 1410 | } |
| 1411 | } |
| 1412 | } |
| 1413 | \f |
| 1414 | |
| 1415 | static void |
| 1416 | set_print (char *arg, int from_tty) |
| 1417 | { |
| 1418 | printf_unfiltered ( |
| 1419 | "\"set print\" must be followed by the name of a print subcommand.\n"); |
| 1420 | help_list (setprintlist, "set print ", -1, gdb_stdout); |
| 1421 | } |
| 1422 | |
| 1423 | static void |
| 1424 | show_print (char *args, int from_tty) |
| 1425 | { |
| 1426 | cmd_show_list (showprintlist, from_tty, ""); |
| 1427 | } |
| 1428 | \f |
| 1429 | void |
| 1430 | _initialize_valprint (void) |
| 1431 | { |
| 1432 | struct cmd_list_element *c; |
| 1433 | |
| 1434 | add_prefix_cmd ("print", no_class, set_print, |
| 1435 | _("Generic command for setting how things print."), |
| 1436 | &setprintlist, "set print ", 0, &setlist); |
| 1437 | add_alias_cmd ("p", "print", no_class, 1, &setlist); |
| 1438 | /* prefer set print to set prompt */ |
| 1439 | add_alias_cmd ("pr", "print", no_class, 1, &setlist); |
| 1440 | |
| 1441 | add_prefix_cmd ("print", no_class, show_print, |
| 1442 | _("Generic command for showing print settings."), |
| 1443 | &showprintlist, "show print ", 0, &showlist); |
| 1444 | add_alias_cmd ("p", "print", no_class, 1, &showlist); |
| 1445 | add_alias_cmd ("pr", "print", no_class, 1, &showlist); |
| 1446 | |
| 1447 | add_setshow_uinteger_cmd ("elements", no_class, &print_max, _("\ |
| 1448 | Set limit on string chars or array elements to print."), _("\ |
| 1449 | Show limit on string chars or array elements to print."), _("\ |
| 1450 | \"set print elements 0\" causes there to be no limit."), |
| 1451 | NULL, |
| 1452 | show_print_max, |
| 1453 | &setprintlist, &showprintlist); |
| 1454 | |
| 1455 | add_setshow_boolean_cmd ("null-stop", no_class, &stop_print_at_null, _("\ |
| 1456 | Set printing of char arrays to stop at first null char."), _("\ |
| 1457 | Show printing of char arrays to stop at first null char."), NULL, |
| 1458 | NULL, |
| 1459 | show_stop_print_at_null, |
| 1460 | &setprintlist, &showprintlist); |
| 1461 | |
| 1462 | add_setshow_uinteger_cmd ("repeats", no_class, |
| 1463 | &repeat_count_threshold, _("\ |
| 1464 | Set threshold for repeated print elements."), _("\ |
| 1465 | Show threshold for repeated print elements."), _("\ |
| 1466 | \"set print repeats 0\" causes all elements to be individually printed."), |
| 1467 | NULL, |
| 1468 | show_repeat_count_threshold, |
| 1469 | &setprintlist, &showprintlist); |
| 1470 | |
| 1471 | add_setshow_boolean_cmd ("pretty", class_support, &prettyprint_structs, _("\ |
| 1472 | Set prettyprinting of structures."), _("\ |
| 1473 | Show prettyprinting of structures."), NULL, |
| 1474 | NULL, |
| 1475 | show_prettyprint_structs, |
| 1476 | &setprintlist, &showprintlist); |
| 1477 | |
| 1478 | add_setshow_boolean_cmd ("union", class_support, &unionprint, _("\ |
| 1479 | Set printing of unions interior to structures."), _("\ |
| 1480 | Show printing of unions interior to structures."), NULL, |
| 1481 | NULL, |
| 1482 | show_unionprint, |
| 1483 | &setprintlist, &showprintlist); |
| 1484 | |
| 1485 | add_setshow_boolean_cmd ("array", class_support, &prettyprint_arrays, _("\ |
| 1486 | Set prettyprinting of arrays."), _("\ |
| 1487 | Show prettyprinting of arrays."), NULL, |
| 1488 | NULL, |
| 1489 | show_prettyprint_arrays, |
| 1490 | &setprintlist, &showprintlist); |
| 1491 | |
| 1492 | add_setshow_boolean_cmd ("address", class_support, &addressprint, _("\ |
| 1493 | Set printing of addresses."), _("\ |
| 1494 | Show printing of addresses."), NULL, |
| 1495 | NULL, |
| 1496 | show_addressprint, |
| 1497 | &setprintlist, &showprintlist); |
| 1498 | |
| 1499 | add_setshow_uinteger_cmd ("input-radix", class_support, &input_radix, _("\ |
| 1500 | Set default input radix for entering numbers."), _("\ |
| 1501 | Show default input radix for entering numbers."), NULL, |
| 1502 | set_input_radix, |
| 1503 | show_input_radix, |
| 1504 | &setlist, &showlist); |
| 1505 | |
| 1506 | add_setshow_uinteger_cmd ("output-radix", class_support, &output_radix, _("\ |
| 1507 | Set default output radix for printing of values."), _("\ |
| 1508 | Show default output radix for printing of values."), NULL, |
| 1509 | set_output_radix, |
| 1510 | show_output_radix, |
| 1511 | &setlist, &showlist); |
| 1512 | |
| 1513 | /* The "set radix" and "show radix" commands are special in that |
| 1514 | they are like normal set and show commands but allow two normally |
| 1515 | independent variables to be either set or shown with a single |
| 1516 | command. So the usual deprecated_add_set_cmd() and [deleted] |
| 1517 | add_show_from_set() commands aren't really appropriate. */ |
| 1518 | /* FIXME: i18n: With the new add_setshow_integer command, that is no |
| 1519 | longer true - show can display anything. */ |
| 1520 | add_cmd ("radix", class_support, set_radix, _("\ |
| 1521 | Set default input and output number radices.\n\ |
| 1522 | Use 'set input-radix' or 'set output-radix' to independently set each.\n\ |
| 1523 | Without an argument, sets both radices back to the default value of 10."), |
| 1524 | &setlist); |
| 1525 | add_cmd ("radix", class_support, show_radix, _("\ |
| 1526 | Show the default input and output number radices.\n\ |
| 1527 | Use 'show input-radix' or 'show output-radix' to independently show each."), |
| 1528 | &showlist); |
| 1529 | |
| 1530 | add_setshow_boolean_cmd ("array-indexes", class_support, |
| 1531 | &print_array_indexes, _("\ |
| 1532 | Set printing of array indexes."), _("\ |
| 1533 | Show printing of array indexes"), NULL, NULL, show_print_array_indexes, |
| 1534 | &setprintlist, &showprintlist); |
| 1535 | |
| 1536 | /* Give people the defaults which they are used to. */ |
| 1537 | prettyprint_structs = 0; |
| 1538 | prettyprint_arrays = 0; |
| 1539 | unionprint = 1; |
| 1540 | addressprint = 1; |
| 1541 | print_max = PRINT_MAX_DEFAULT; |
| 1542 | } |