| 1 | /* General utility routines for GDB, the GNU debugger. |
| 2 | Copyright 1986, 1989, 1990, 1991, 1992, 1995 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 19 | |
| 20 | #include "defs.h" |
| 21 | #if !defined(__GO32__) && !defined(__WIN32__) && !defined(MPW) |
| 22 | #include <sys/ioctl.h> |
| 23 | #include <sys/param.h> |
| 24 | #include <pwd.h> |
| 25 | #endif |
| 26 | #ifdef ANSI_PROTOTYPES |
| 27 | #include <stdarg.h> |
| 28 | #else |
| 29 | #include <varargs.h> |
| 30 | #endif |
| 31 | #include <ctype.h> |
| 32 | #include "gdb_string.h" |
| 33 | #ifdef HAVE_UNISTD_H |
| 34 | #include <unistd.h> |
| 35 | #endif |
| 36 | |
| 37 | #include "signals.h" |
| 38 | #include "gdbcmd.h" |
| 39 | #include "serial.h" |
| 40 | #include "bfd.h" |
| 41 | #include "target.h" |
| 42 | #include "demangle.h" |
| 43 | #include "expression.h" |
| 44 | #include "language.h" |
| 45 | #include "annotate.h" |
| 46 | |
| 47 | #include "readline.h" |
| 48 | |
| 49 | /* readline defines this. */ |
| 50 | #undef savestring |
| 51 | |
| 52 | /* Prototypes for local functions */ |
| 53 | |
| 54 | static void vfprintf_maybe_filtered PARAMS ((FILE *, const char *, va_list, int)); |
| 55 | |
| 56 | static void fputs_maybe_filtered PARAMS ((const char *, FILE *, int)); |
| 57 | |
| 58 | #if !defined (NO_MMALLOC) && !defined (NO_MMCHECK) |
| 59 | static void malloc_botch PARAMS ((void)); |
| 60 | #endif |
| 61 | |
| 62 | static void |
| 63 | fatal_dump_core PARAMS((char *, ...)); |
| 64 | |
| 65 | static void |
| 66 | prompt_for_continue PARAMS ((void)); |
| 67 | |
| 68 | static void |
| 69 | set_width_command PARAMS ((char *, int, struct cmd_list_element *)); |
| 70 | |
| 71 | /* If this definition isn't overridden by the header files, assume |
| 72 | that isatty and fileno exist on this system. */ |
| 73 | #ifndef ISATTY |
| 74 | #define ISATTY(FP) (isatty (fileno (FP))) |
| 75 | #endif |
| 76 | |
| 77 | /* Chain of cleanup actions established with make_cleanup, |
| 78 | to be executed if an error happens. */ |
| 79 | |
| 80 | static struct cleanup *cleanup_chain; |
| 81 | |
| 82 | /* Nonzero if we have job control. */ |
| 83 | |
| 84 | int job_control; |
| 85 | |
| 86 | /* Nonzero means a quit has been requested. */ |
| 87 | |
| 88 | int quit_flag; |
| 89 | |
| 90 | /* Nonzero means quit immediately if Control-C is typed now, rather |
| 91 | than waiting until QUIT is executed. Be careful in setting this; |
| 92 | code which executes with immediate_quit set has to be very careful |
| 93 | about being able to deal with being interrupted at any time. It is |
| 94 | almost always better to use QUIT; the only exception I can think of |
| 95 | is being able to quit out of a system call (using EINTR loses if |
| 96 | the SIGINT happens between the previous QUIT and the system call). |
| 97 | To immediately quit in the case in which a SIGINT happens between |
| 98 | the previous QUIT and setting immediate_quit (desirable anytime we |
| 99 | expect to block), call QUIT after setting immediate_quit. */ |
| 100 | |
| 101 | int immediate_quit; |
| 102 | |
| 103 | /* Nonzero means that encoded C++ names should be printed out in their |
| 104 | C++ form rather than raw. */ |
| 105 | |
| 106 | int demangle = 1; |
| 107 | |
| 108 | /* Nonzero means that encoded C++ names should be printed out in their |
| 109 | C++ form even in assembler language displays. If this is set, but |
| 110 | DEMANGLE is zero, names are printed raw, i.e. DEMANGLE controls. */ |
| 111 | |
| 112 | int asm_demangle = 0; |
| 113 | |
| 114 | /* Nonzero means that strings with character values >0x7F should be printed |
| 115 | as octal escapes. Zero means just print the value (e.g. it's an |
| 116 | international character, and the terminal or window can cope.) */ |
| 117 | |
| 118 | int sevenbit_strings = 0; |
| 119 | |
| 120 | /* String to be printed before error messages, if any. */ |
| 121 | |
| 122 | char *error_pre_print; |
| 123 | |
| 124 | /* String to be printed before quit messages, if any. */ |
| 125 | |
| 126 | char *quit_pre_print; |
| 127 | |
| 128 | /* String to be printed before warning messages, if any. */ |
| 129 | |
| 130 | char *warning_pre_print = "\nwarning: "; |
| 131 | \f |
| 132 | /* Add a new cleanup to the cleanup_chain, |
| 133 | and return the previous chain pointer |
| 134 | to be passed later to do_cleanups or discard_cleanups. |
| 135 | Args are FUNCTION to clean up with, and ARG to pass to it. */ |
| 136 | |
| 137 | struct cleanup * |
| 138 | make_cleanup (function, arg) |
| 139 | void (*function) PARAMS ((PTR)); |
| 140 | PTR arg; |
| 141 | { |
| 142 | register struct cleanup *new |
| 143 | = (struct cleanup *) xmalloc (sizeof (struct cleanup)); |
| 144 | register struct cleanup *old_chain = cleanup_chain; |
| 145 | |
| 146 | new->next = cleanup_chain; |
| 147 | new->function = function; |
| 148 | new->arg = arg; |
| 149 | cleanup_chain = new; |
| 150 | |
| 151 | return old_chain; |
| 152 | } |
| 153 | |
| 154 | /* Discard cleanups and do the actions they describe |
| 155 | until we get back to the point OLD_CHAIN in the cleanup_chain. */ |
| 156 | |
| 157 | void |
| 158 | do_cleanups (old_chain) |
| 159 | register struct cleanup *old_chain; |
| 160 | { |
| 161 | register struct cleanup *ptr; |
| 162 | while ((ptr = cleanup_chain) != old_chain) |
| 163 | { |
| 164 | cleanup_chain = ptr->next; /* Do this first incase recursion */ |
| 165 | (*ptr->function) (ptr->arg); |
| 166 | free (ptr); |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | /* Discard cleanups, not doing the actions they describe, |
| 171 | until we get back to the point OLD_CHAIN in the cleanup_chain. */ |
| 172 | |
| 173 | void |
| 174 | discard_cleanups (old_chain) |
| 175 | register struct cleanup *old_chain; |
| 176 | { |
| 177 | register struct cleanup *ptr; |
| 178 | while ((ptr = cleanup_chain) != old_chain) |
| 179 | { |
| 180 | cleanup_chain = ptr->next; |
| 181 | free ((PTR)ptr); |
| 182 | } |
| 183 | } |
| 184 | |
| 185 | /* Set the cleanup_chain to 0, and return the old cleanup chain. */ |
| 186 | struct cleanup * |
| 187 | save_cleanups () |
| 188 | { |
| 189 | struct cleanup *old_chain = cleanup_chain; |
| 190 | |
| 191 | cleanup_chain = 0; |
| 192 | return old_chain; |
| 193 | } |
| 194 | |
| 195 | /* Restore the cleanup chain from a previously saved chain. */ |
| 196 | void |
| 197 | restore_cleanups (chain) |
| 198 | struct cleanup *chain; |
| 199 | { |
| 200 | cleanup_chain = chain; |
| 201 | } |
| 202 | |
| 203 | /* This function is useful for cleanups. |
| 204 | Do |
| 205 | |
| 206 | foo = xmalloc (...); |
| 207 | old_chain = make_cleanup (free_current_contents, &foo); |
| 208 | |
| 209 | to arrange to free the object thus allocated. */ |
| 210 | |
| 211 | void |
| 212 | free_current_contents (location) |
| 213 | char **location; |
| 214 | { |
| 215 | free (*location); |
| 216 | } |
| 217 | |
| 218 | /* Provide a known function that does nothing, to use as a base for |
| 219 | for a possibly long chain of cleanups. This is useful where we |
| 220 | use the cleanup chain for handling normal cleanups as well as dealing |
| 221 | with cleanups that need to be done as a result of a call to error(). |
| 222 | In such cases, we may not be certain where the first cleanup is, unless |
| 223 | we have a do-nothing one to always use as the base. */ |
| 224 | |
| 225 | /* ARGSUSED */ |
| 226 | void |
| 227 | null_cleanup (arg) |
| 228 | PTR arg; |
| 229 | { |
| 230 | } |
| 231 | |
| 232 | \f |
| 233 | /* Print a warning message. Way to use this is to call warning_begin, |
| 234 | output the warning message (use unfiltered output to gdb_stderr), |
| 235 | ending in a newline. There is not currently a warning_end that you |
| 236 | call afterwards, but such a thing might be added if it is useful |
| 237 | for a GUI to separate warning messages from other output. |
| 238 | |
| 239 | FIXME: Why do warnings use unfiltered output and errors filtered? |
| 240 | Is this anything other than a historical accident? */ |
| 241 | |
| 242 | void |
| 243 | warning_begin () |
| 244 | { |
| 245 | target_terminal_ours (); |
| 246 | wrap_here(""); /* Force out any buffered output */ |
| 247 | gdb_flush (gdb_stdout); |
| 248 | if (warning_pre_print) |
| 249 | fprintf_unfiltered (gdb_stderr, warning_pre_print); |
| 250 | } |
| 251 | |
| 252 | /* Print a warning message. |
| 253 | The first argument STRING is the warning message, used as a fprintf string, |
| 254 | and the remaining args are passed as arguments to it. |
| 255 | The primary difference between warnings and errors is that a warning |
| 256 | does not force the return to command level. */ |
| 257 | |
| 258 | /* VARARGS */ |
| 259 | void |
| 260 | #ifdef ANSI_PROTOTYPES |
| 261 | warning (char *string, ...) |
| 262 | #else |
| 263 | warning (va_alist) |
| 264 | va_dcl |
| 265 | #endif |
| 266 | { |
| 267 | va_list args; |
| 268 | #ifdef ANSI_PROTOTYPES |
| 269 | va_start (args, string); |
| 270 | #else |
| 271 | char *string; |
| 272 | |
| 273 | va_start (args); |
| 274 | string = va_arg (args, char *); |
| 275 | #endif |
| 276 | warning_begin (); |
| 277 | vfprintf_unfiltered (gdb_stderr, string, args); |
| 278 | fprintf_unfiltered (gdb_stderr, "\n"); |
| 279 | va_end (args); |
| 280 | } |
| 281 | |
| 282 | /* Start the printing of an error message. Way to use this is to call |
| 283 | this, output the error message (use filtered output to gdb_stderr |
| 284 | (FIXME: Some callers, like memory_error, use gdb_stdout)), ending |
| 285 | in a newline, and then call return_to_top_level (RETURN_ERROR). |
| 286 | error() provides a convenient way to do this for the special case |
| 287 | that the error message can be formatted with a single printf call, |
| 288 | but this is more general. */ |
| 289 | void |
| 290 | error_begin () |
| 291 | { |
| 292 | target_terminal_ours (); |
| 293 | wrap_here (""); /* Force out any buffered output */ |
| 294 | gdb_flush (gdb_stdout); |
| 295 | |
| 296 | annotate_error_begin (); |
| 297 | |
| 298 | if (error_pre_print) |
| 299 | fprintf_filtered (gdb_stderr, error_pre_print); |
| 300 | } |
| 301 | |
| 302 | /* Print an error message and return to command level. |
| 303 | The first argument STRING is the error message, used as a fprintf string, |
| 304 | and the remaining args are passed as arguments to it. */ |
| 305 | |
| 306 | #ifdef ANSI_PROTOTYPES |
| 307 | NORETURN void |
| 308 | error (char *string, ...) |
| 309 | #else |
| 310 | void |
| 311 | error (va_alist) |
| 312 | va_dcl |
| 313 | #endif |
| 314 | { |
| 315 | va_list args; |
| 316 | #ifdef ANSI_PROTOTYPES |
| 317 | va_start (args, string); |
| 318 | #else |
| 319 | va_start (args); |
| 320 | #endif |
| 321 | if (error_hook) |
| 322 | (*error_hook) (); |
| 323 | else |
| 324 | { |
| 325 | error_begin (); |
| 326 | #ifdef ANSI_PROTOTYPES |
| 327 | vfprintf_filtered (gdb_stderr, string, args); |
| 328 | #else |
| 329 | { |
| 330 | char *string1; |
| 331 | |
| 332 | string1 = va_arg (args, char *); |
| 333 | vfprintf_filtered (gdb_stderr, string1, args); |
| 334 | } |
| 335 | #endif |
| 336 | fprintf_filtered (gdb_stderr, "\n"); |
| 337 | va_end (args); |
| 338 | return_to_top_level (RETURN_ERROR); |
| 339 | } |
| 340 | } |
| 341 | |
| 342 | |
| 343 | /* Print an error message and exit reporting failure. |
| 344 | This is for a error that we cannot continue from. |
| 345 | The arguments are printed a la printf. |
| 346 | |
| 347 | This function cannot be declared volatile (NORETURN) in an |
| 348 | ANSI environment because exit() is not declared volatile. */ |
| 349 | |
| 350 | /* VARARGS */ |
| 351 | NORETURN void |
| 352 | #ifdef ANSI_PROTOTYPES |
| 353 | fatal (char *string, ...) |
| 354 | #else |
| 355 | fatal (va_alist) |
| 356 | va_dcl |
| 357 | #endif |
| 358 | { |
| 359 | va_list args; |
| 360 | #ifdef ANSI_PROTOTYPES |
| 361 | va_start (args, string); |
| 362 | #else |
| 363 | char *string; |
| 364 | va_start (args); |
| 365 | string = va_arg (args, char *); |
| 366 | #endif |
| 367 | fprintf_unfiltered (gdb_stderr, "\ngdb: "); |
| 368 | vfprintf_unfiltered (gdb_stderr, string, args); |
| 369 | fprintf_unfiltered (gdb_stderr, "\n"); |
| 370 | va_end (args); |
| 371 | exit (1); |
| 372 | } |
| 373 | |
| 374 | /* Print an error message and exit, dumping core. |
| 375 | The arguments are printed a la printf (). */ |
| 376 | |
| 377 | /* VARARGS */ |
| 378 | static void |
| 379 | #ifdef ANSI_PROTOTYPES |
| 380 | fatal_dump_core (char *string, ...) |
| 381 | #else |
| 382 | fatal_dump_core (va_alist) |
| 383 | va_dcl |
| 384 | #endif |
| 385 | { |
| 386 | va_list args; |
| 387 | #ifdef ANSI_PROTOTYPES |
| 388 | va_start (args, string); |
| 389 | #else |
| 390 | char *string; |
| 391 | |
| 392 | va_start (args); |
| 393 | string = va_arg (args, char *); |
| 394 | #endif |
| 395 | /* "internal error" is always correct, since GDB should never dump |
| 396 | core, no matter what the input. */ |
| 397 | fprintf_unfiltered (gdb_stderr, "\ngdb internal error: "); |
| 398 | vfprintf_unfiltered (gdb_stderr, string, args); |
| 399 | fprintf_unfiltered (gdb_stderr, "\n"); |
| 400 | va_end (args); |
| 401 | |
| 402 | signal (SIGQUIT, SIG_DFL); |
| 403 | kill (getpid (), SIGQUIT); |
| 404 | /* We should never get here, but just in case... */ |
| 405 | exit (1); |
| 406 | } |
| 407 | |
| 408 | /* The strerror() function can return NULL for errno values that are |
| 409 | out of range. Provide a "safe" version that always returns a |
| 410 | printable string. */ |
| 411 | |
| 412 | char * |
| 413 | safe_strerror (errnum) |
| 414 | int errnum; |
| 415 | { |
| 416 | char *msg; |
| 417 | static char buf[32]; |
| 418 | |
| 419 | if ((msg = strerror (errnum)) == NULL) |
| 420 | { |
| 421 | sprintf (buf, "(undocumented errno %d)", errnum); |
| 422 | msg = buf; |
| 423 | } |
| 424 | return (msg); |
| 425 | } |
| 426 | |
| 427 | /* The strsignal() function can return NULL for signal values that are |
| 428 | out of range. Provide a "safe" version that always returns a |
| 429 | printable string. */ |
| 430 | |
| 431 | char * |
| 432 | safe_strsignal (signo) |
| 433 | int signo; |
| 434 | { |
| 435 | char *msg; |
| 436 | static char buf[32]; |
| 437 | |
| 438 | if ((msg = strsignal (signo)) == NULL) |
| 439 | { |
| 440 | sprintf (buf, "(undocumented signal %d)", signo); |
| 441 | msg = buf; |
| 442 | } |
| 443 | return (msg); |
| 444 | } |
| 445 | |
| 446 | |
| 447 | /* Print the system error message for errno, and also mention STRING |
| 448 | as the file name for which the error was encountered. |
| 449 | Then return to command level. */ |
| 450 | |
| 451 | void |
| 452 | perror_with_name (string) |
| 453 | char *string; |
| 454 | { |
| 455 | char *err; |
| 456 | char *combined; |
| 457 | |
| 458 | err = safe_strerror (errno); |
| 459 | combined = (char *) alloca (strlen (err) + strlen (string) + 3); |
| 460 | strcpy (combined, string); |
| 461 | strcat (combined, ": "); |
| 462 | strcat (combined, err); |
| 463 | |
| 464 | /* I understand setting these is a matter of taste. Still, some people |
| 465 | may clear errno but not know about bfd_error. Doing this here is not |
| 466 | unreasonable. */ |
| 467 | bfd_set_error (bfd_error_no_error); |
| 468 | errno = 0; |
| 469 | |
| 470 | error ("%s.", combined); |
| 471 | } |
| 472 | |
| 473 | /* Print the system error message for ERRCODE, and also mention STRING |
| 474 | as the file name for which the error was encountered. */ |
| 475 | |
| 476 | void |
| 477 | print_sys_errmsg (string, errcode) |
| 478 | char *string; |
| 479 | int errcode; |
| 480 | { |
| 481 | char *err; |
| 482 | char *combined; |
| 483 | |
| 484 | err = safe_strerror (errcode); |
| 485 | combined = (char *) alloca (strlen (err) + strlen (string) + 3); |
| 486 | strcpy (combined, string); |
| 487 | strcat (combined, ": "); |
| 488 | strcat (combined, err); |
| 489 | |
| 490 | /* We want anything which was printed on stdout to come out first, before |
| 491 | this message. */ |
| 492 | gdb_flush (gdb_stdout); |
| 493 | fprintf_unfiltered (gdb_stderr, "%s.\n", combined); |
| 494 | } |
| 495 | |
| 496 | /* Control C eventually causes this to be called, at a convenient time. */ |
| 497 | |
| 498 | void |
| 499 | quit () |
| 500 | { |
| 501 | serial_t gdb_stdout_serial = serial_fdopen (1); |
| 502 | |
| 503 | target_terminal_ours (); |
| 504 | |
| 505 | /* We want all output to appear now, before we print "Quit". We |
| 506 | have 3 levels of buffering we have to flush (it's possible that |
| 507 | some of these should be changed to flush the lower-level ones |
| 508 | too): */ |
| 509 | |
| 510 | /* 1. The _filtered buffer. */ |
| 511 | wrap_here ((char *)0); |
| 512 | |
| 513 | /* 2. The stdio buffer. */ |
| 514 | gdb_flush (gdb_stdout); |
| 515 | gdb_flush (gdb_stderr); |
| 516 | |
| 517 | /* 3. The system-level buffer. */ |
| 518 | SERIAL_FLUSH_OUTPUT (gdb_stdout_serial); |
| 519 | SERIAL_UN_FDOPEN (gdb_stdout_serial); |
| 520 | |
| 521 | annotate_error_begin (); |
| 522 | |
| 523 | /* Don't use *_filtered; we don't want to prompt the user to continue. */ |
| 524 | if (quit_pre_print) |
| 525 | fprintf_unfiltered (gdb_stderr, quit_pre_print); |
| 526 | |
| 527 | if (job_control |
| 528 | /* If there is no terminal switching for this target, then we can't |
| 529 | possibly get screwed by the lack of job control. */ |
| 530 | || current_target.to_terminal_ours == NULL) |
| 531 | fprintf_unfiltered (gdb_stderr, "Quit\n"); |
| 532 | else |
| 533 | fprintf_unfiltered (gdb_stderr, |
| 534 | "Quit (expect signal SIGINT when the program is resumed)\n"); |
| 535 | return_to_top_level (RETURN_QUIT); |
| 536 | } |
| 537 | |
| 538 | |
| 539 | #if defined(__GO32__)||defined(WINGDB) |
| 540 | |
| 541 | /* In the absence of signals, poll keyboard for a quit. |
| 542 | Called from #define QUIT pollquit() in xm-go32.h. */ |
| 543 | |
| 544 | void |
| 545 | pollquit() |
| 546 | { |
| 547 | if (kbhit ()) |
| 548 | { |
| 549 | int k = getkey (); |
| 550 | if (k == 1) { |
| 551 | quit_flag = 1; |
| 552 | quit(); |
| 553 | } |
| 554 | else if (k == 2) { |
| 555 | immediate_quit = 1; |
| 556 | quit (); |
| 557 | } |
| 558 | else |
| 559 | { |
| 560 | /* We just ignore it */ |
| 561 | fprintf_unfiltered (gdb_stderr, "CTRL-A to quit, CTRL-B to quit harder\n"); |
| 562 | } |
| 563 | } |
| 564 | } |
| 565 | |
| 566 | |
| 567 | #endif |
| 568 | #if defined(__GO32__)||defined(WINGDB) |
| 569 | void notice_quit() |
| 570 | { |
| 571 | if (kbhit ()) |
| 572 | { |
| 573 | int k = getkey (); |
| 574 | if (k == 1) { |
| 575 | quit_flag = 1; |
| 576 | } |
| 577 | else if (k == 2) |
| 578 | { |
| 579 | immediate_quit = 1; |
| 580 | } |
| 581 | else |
| 582 | { |
| 583 | fprintf_unfiltered (gdb_stderr, "CTRL-A to quit, CTRL-B to quit harder\n"); |
| 584 | } |
| 585 | } |
| 586 | } |
| 587 | #else |
| 588 | void notice_quit() |
| 589 | { |
| 590 | /* Done by signals */ |
| 591 | } |
| 592 | #endif |
| 593 | /* Control C comes here */ |
| 594 | |
| 595 | void |
| 596 | request_quit (signo) |
| 597 | int signo; |
| 598 | { |
| 599 | quit_flag = 1; |
| 600 | /* Restore the signal handler. Harmless with BSD-style signals, needed |
| 601 | for System V-style signals. So just always do it, rather than worrying |
| 602 | about USG defines and stuff like that. */ |
| 603 | signal (signo, request_quit); |
| 604 | |
| 605 | /* start-sanitize-gm */ |
| 606 | #ifdef GENERAL_MAGIC |
| 607 | target_kill (); |
| 608 | #endif /* GENERAL_MAGIC */ |
| 609 | /* end-sanitize-gm */ |
| 610 | |
| 611 | #ifdef REQUEST_QUIT |
| 612 | REQUEST_QUIT; |
| 613 | #else |
| 614 | if (immediate_quit) |
| 615 | quit (); |
| 616 | #endif |
| 617 | } |
| 618 | |
| 619 | \f |
| 620 | /* Memory management stuff (malloc friends). */ |
| 621 | |
| 622 | #if defined (NO_MMALLOC) |
| 623 | |
| 624 | /* Make a substitute size_t for non-ANSI compilers. */ |
| 625 | |
| 626 | #ifdef _AIX |
| 627 | #include <stddef.h> |
| 628 | #else /* Not AIX */ |
| 629 | #ifndef __STDC__ |
| 630 | #ifndef size_t |
| 631 | #define size_t unsigned int |
| 632 | #endif |
| 633 | #endif |
| 634 | #endif /* Not AIX */ |
| 635 | |
| 636 | PTR |
| 637 | mmalloc (md, size) |
| 638 | PTR md; |
| 639 | size_t size; |
| 640 | { |
| 641 | return malloc (size); |
| 642 | } |
| 643 | |
| 644 | PTR |
| 645 | mrealloc (md, ptr, size) |
| 646 | PTR md; |
| 647 | PTR ptr; |
| 648 | size_t size; |
| 649 | { |
| 650 | if (ptr == 0) /* Guard against old realloc's */ |
| 651 | return malloc (size); |
| 652 | else |
| 653 | return realloc (ptr, size); |
| 654 | } |
| 655 | |
| 656 | void |
| 657 | mfree (md, ptr) |
| 658 | PTR md; |
| 659 | PTR ptr; |
| 660 | { |
| 661 | free (ptr); |
| 662 | } |
| 663 | |
| 664 | #endif /* NO_MMALLOC */ |
| 665 | |
| 666 | #if defined (NO_MMALLOC) || defined (NO_MMCHECK) |
| 667 | |
| 668 | void |
| 669 | init_malloc (md) |
| 670 | PTR md; |
| 671 | { |
| 672 | } |
| 673 | |
| 674 | #else /* Have mmalloc and want corruption checking */ |
| 675 | |
| 676 | static void |
| 677 | malloc_botch () |
| 678 | { |
| 679 | fatal_dump_core ("Memory corruption"); |
| 680 | } |
| 681 | |
| 682 | /* Attempt to install hooks in mmalloc/mrealloc/mfree for the heap specified |
| 683 | by MD, to detect memory corruption. Note that MD may be NULL to specify |
| 684 | the default heap that grows via sbrk. |
| 685 | |
| 686 | Note that for freshly created regions, we must call mmcheckf prior to any |
| 687 | mallocs in the region. Otherwise, any region which was allocated prior to |
| 688 | installing the checking hooks, which is later reallocated or freed, will |
| 689 | fail the checks! The mmcheck function only allows initial hooks to be |
| 690 | installed before the first mmalloc. However, anytime after we have called |
| 691 | mmcheck the first time to install the checking hooks, we can call it again |
| 692 | to update the function pointer to the memory corruption handler. |
| 693 | |
| 694 | Returns zero on failure, non-zero on success. */ |
| 695 | |
| 696 | #ifndef MMCHECK_FORCE |
| 697 | #define MMCHECK_FORCE 0 |
| 698 | #endif |
| 699 | |
| 700 | void |
| 701 | init_malloc (md) |
| 702 | PTR md; |
| 703 | { |
| 704 | if (!mmcheckf (md, malloc_botch, MMCHECK_FORCE)) |
| 705 | { |
| 706 | /* Don't use warning(), which relies on current_target being set |
| 707 | to something other than dummy_target, until after |
| 708 | initialize_all_files(). */ |
| 709 | |
| 710 | fprintf_unfiltered |
| 711 | (gdb_stderr, "warning: failed to install memory consistency checks; "); |
| 712 | fprintf_unfiltered |
| 713 | (gdb_stderr, "configuration should define NO_MMCHECK or MMCHECK_FORCE\n"); |
| 714 | } |
| 715 | |
| 716 | mmtrace (); |
| 717 | } |
| 718 | |
| 719 | #endif /* Have mmalloc and want corruption checking */ |
| 720 | |
| 721 | /* Called when a memory allocation fails, with the number of bytes of |
| 722 | memory requested in SIZE. */ |
| 723 | |
| 724 | NORETURN void |
| 725 | nomem (size) |
| 726 | long size; |
| 727 | { |
| 728 | if (size > 0) |
| 729 | { |
| 730 | fatal ("virtual memory exhausted: can't allocate %ld bytes.", size); |
| 731 | } |
| 732 | else |
| 733 | { |
| 734 | fatal ("virtual memory exhausted."); |
| 735 | } |
| 736 | } |
| 737 | |
| 738 | /* Like mmalloc but get error if no storage available, and protect against |
| 739 | the caller wanting to allocate zero bytes. Whether to return NULL for |
| 740 | a zero byte request, or translate the request into a request for one |
| 741 | byte of zero'd storage, is a religious issue. */ |
| 742 | |
| 743 | PTR |
| 744 | xmmalloc (md, size) |
| 745 | PTR md; |
| 746 | long size; |
| 747 | { |
| 748 | register PTR val; |
| 749 | |
| 750 | if (size == 0) |
| 751 | { |
| 752 | val = NULL; |
| 753 | } |
| 754 | else if ((val = mmalloc (md, size)) == NULL) |
| 755 | { |
| 756 | nomem (size); |
| 757 | } |
| 758 | return (val); |
| 759 | } |
| 760 | |
| 761 | /* Like mrealloc but get error if no storage available. */ |
| 762 | |
| 763 | PTR |
| 764 | xmrealloc (md, ptr, size) |
| 765 | PTR md; |
| 766 | PTR ptr; |
| 767 | long size; |
| 768 | { |
| 769 | register PTR val; |
| 770 | |
| 771 | if (ptr != NULL) |
| 772 | { |
| 773 | val = mrealloc (md, ptr, size); |
| 774 | } |
| 775 | else |
| 776 | { |
| 777 | val = mmalloc (md, size); |
| 778 | } |
| 779 | if (val == NULL) |
| 780 | { |
| 781 | nomem (size); |
| 782 | } |
| 783 | return (val); |
| 784 | } |
| 785 | |
| 786 | /* Like malloc but get error if no storage available, and protect against |
| 787 | the caller wanting to allocate zero bytes. */ |
| 788 | |
| 789 | PTR |
| 790 | xmalloc (size) |
| 791 | long size; |
| 792 | { |
| 793 | return (xmmalloc ((PTR) NULL, size)); |
| 794 | } |
| 795 | |
| 796 | /* Like mrealloc but get error if no storage available. */ |
| 797 | |
| 798 | PTR |
| 799 | xrealloc (ptr, size) |
| 800 | PTR ptr; |
| 801 | long size; |
| 802 | { |
| 803 | return (xmrealloc ((PTR) NULL, ptr, size)); |
| 804 | } |
| 805 | |
| 806 | \f |
| 807 | /* My replacement for the read system call. |
| 808 | Used like `read' but keeps going if `read' returns too soon. */ |
| 809 | |
| 810 | int |
| 811 | myread (desc, addr, len) |
| 812 | int desc; |
| 813 | char *addr; |
| 814 | int len; |
| 815 | { |
| 816 | register int val; |
| 817 | int orglen = len; |
| 818 | |
| 819 | while (len > 0) |
| 820 | { |
| 821 | val = read (desc, addr, len); |
| 822 | if (val < 0) |
| 823 | return val; |
| 824 | if (val == 0) |
| 825 | return orglen - len; |
| 826 | len -= val; |
| 827 | addr += val; |
| 828 | } |
| 829 | return orglen; |
| 830 | } |
| 831 | \f |
| 832 | /* Make a copy of the string at PTR with SIZE characters |
| 833 | (and add a null character at the end in the copy). |
| 834 | Uses malloc to get the space. Returns the address of the copy. */ |
| 835 | |
| 836 | char * |
| 837 | savestring (ptr, size) |
| 838 | const char *ptr; |
| 839 | int size; |
| 840 | { |
| 841 | register char *p = (char *) xmalloc (size + 1); |
| 842 | memcpy (p, ptr, size); |
| 843 | p[size] = 0; |
| 844 | return p; |
| 845 | } |
| 846 | |
| 847 | char * |
| 848 | msavestring (md, ptr, size) |
| 849 | PTR md; |
| 850 | const char *ptr; |
| 851 | int size; |
| 852 | { |
| 853 | register char *p = (char *) xmmalloc (md, size + 1); |
| 854 | memcpy (p, ptr, size); |
| 855 | p[size] = 0; |
| 856 | return p; |
| 857 | } |
| 858 | |
| 859 | /* The "const" is so it compiles under DGUX (which prototypes strsave |
| 860 | in <string.h>. FIXME: This should be named "xstrsave", shouldn't it? |
| 861 | Doesn't real strsave return NULL if out of memory? */ |
| 862 | char * |
| 863 | strsave (ptr) |
| 864 | const char *ptr; |
| 865 | { |
| 866 | return savestring (ptr, strlen (ptr)); |
| 867 | } |
| 868 | |
| 869 | char * |
| 870 | mstrsave (md, ptr) |
| 871 | PTR md; |
| 872 | const char *ptr; |
| 873 | { |
| 874 | return (msavestring (md, ptr, strlen (ptr))); |
| 875 | } |
| 876 | |
| 877 | void |
| 878 | print_spaces (n, file) |
| 879 | register int n; |
| 880 | register FILE *file; |
| 881 | { |
| 882 | while (n-- > 0) |
| 883 | fputc (' ', file); |
| 884 | } |
| 885 | |
| 886 | /* Print a host address. */ |
| 887 | |
| 888 | void |
| 889 | gdb_print_address (addr, stream) |
| 890 | PTR addr; |
| 891 | GDB_FILE *stream; |
| 892 | { |
| 893 | |
| 894 | /* We could use the %p conversion specifier to fprintf if we had any |
| 895 | way of knowing whether this host supports it. But the following |
| 896 | should work on the Alpha and on 32 bit machines. */ |
| 897 | |
| 898 | fprintf_filtered (stream, "0x%lx", (unsigned long)addr); |
| 899 | } |
| 900 | |
| 901 | /* Ask user a y-or-n question and return 1 iff answer is yes. |
| 902 | Takes three args which are given to printf to print the question. |
| 903 | The first, a control string, should end in "? ". |
| 904 | It should not say how to answer, because we do that. */ |
| 905 | |
| 906 | /* VARARGS */ |
| 907 | int |
| 908 | #ifdef ANSI_PROTOTYPES |
| 909 | query (char *ctlstr, ...) |
| 910 | #else |
| 911 | query (va_alist) |
| 912 | va_dcl |
| 913 | #endif |
| 914 | { |
| 915 | va_list args; |
| 916 | register int answer; |
| 917 | register int ans2; |
| 918 | int retval; |
| 919 | |
| 920 | #ifdef ANSI_PROTOTYPES |
| 921 | va_start (args, ctlstr); |
| 922 | #else |
| 923 | char *ctlstr; |
| 924 | va_start (args); |
| 925 | ctlstr = va_arg (args, char *); |
| 926 | #endif |
| 927 | |
| 928 | if (query_hook) |
| 929 | { |
| 930 | return query_hook (ctlstr, args); |
| 931 | } |
| 932 | |
| 933 | /* Automatically answer "yes" if input is not from a terminal. */ |
| 934 | if (!input_from_terminal_p ()) |
| 935 | return 1; |
| 936 | #ifdef MPW |
| 937 | /* FIXME Automatically answer "yes" if called from MacGDB. */ |
| 938 | if (mac_app) |
| 939 | return 1; |
| 940 | #endif /* MPW */ |
| 941 | |
| 942 | while (1) |
| 943 | { |
| 944 | wrap_here (""); /* Flush any buffered output */ |
| 945 | gdb_flush (gdb_stdout); |
| 946 | |
| 947 | if (annotation_level > 1) |
| 948 | printf_filtered ("\n\032\032pre-query\n"); |
| 949 | |
| 950 | vfprintf_filtered (gdb_stdout, ctlstr, args); |
| 951 | printf_filtered ("(y or n) "); |
| 952 | |
| 953 | if (annotation_level > 1) |
| 954 | printf_filtered ("\n\032\032query\n"); |
| 955 | |
| 956 | #ifdef MPW |
| 957 | /* If not in MacGDB, move to a new line so the entered line doesn't |
| 958 | have a prompt on the front of it. */ |
| 959 | if (!mac_app) |
| 960 | fputs_unfiltered ("\n", gdb_stdout); |
| 961 | #endif /* MPW */ |
| 962 | |
| 963 | gdb_flush (gdb_stdout); |
| 964 | answer = fgetc (stdin); |
| 965 | clearerr (stdin); /* in case of C-d */ |
| 966 | if (answer == EOF) /* C-d */ |
| 967 | { |
| 968 | retval = 1; |
| 969 | break; |
| 970 | } |
| 971 | if (answer != '\n') /* Eat rest of input line, to EOF or newline */ |
| 972 | do |
| 973 | { |
| 974 | ans2 = fgetc (stdin); |
| 975 | clearerr (stdin); |
| 976 | } |
| 977 | while (ans2 != EOF && ans2 != '\n'); |
| 978 | if (answer >= 'a') |
| 979 | answer -= 040; |
| 980 | if (answer == 'Y') |
| 981 | { |
| 982 | retval = 1; |
| 983 | break; |
| 984 | } |
| 985 | if (answer == 'N') |
| 986 | { |
| 987 | retval = 0; |
| 988 | break; |
| 989 | } |
| 990 | printf_filtered ("Please answer y or n.\n"); |
| 991 | } |
| 992 | |
| 993 | if (annotation_level > 1) |
| 994 | printf_filtered ("\n\032\032post-query\n"); |
| 995 | return retval; |
| 996 | } |
| 997 | |
| 998 | \f |
| 999 | /* Parse a C escape sequence. STRING_PTR points to a variable |
| 1000 | containing a pointer to the string to parse. That pointer |
| 1001 | should point to the character after the \. That pointer |
| 1002 | is updated past the characters we use. The value of the |
| 1003 | escape sequence is returned. |
| 1004 | |
| 1005 | A negative value means the sequence \ newline was seen, |
| 1006 | which is supposed to be equivalent to nothing at all. |
| 1007 | |
| 1008 | If \ is followed by a null character, we return a negative |
| 1009 | value and leave the string pointer pointing at the null character. |
| 1010 | |
| 1011 | If \ is followed by 000, we return 0 and leave the string pointer |
| 1012 | after the zeros. A value of 0 does not mean end of string. */ |
| 1013 | |
| 1014 | int |
| 1015 | parse_escape (string_ptr) |
| 1016 | char **string_ptr; |
| 1017 | { |
| 1018 | register int c = *(*string_ptr)++; |
| 1019 | switch (c) |
| 1020 | { |
| 1021 | case 'a': |
| 1022 | return 007; /* Bell (alert) char */ |
| 1023 | case 'b': |
| 1024 | return '\b'; |
| 1025 | case 'e': /* Escape character */ |
| 1026 | return 033; |
| 1027 | case 'f': |
| 1028 | return '\f'; |
| 1029 | case 'n': |
| 1030 | return '\n'; |
| 1031 | case 'r': |
| 1032 | return '\r'; |
| 1033 | case 't': |
| 1034 | return '\t'; |
| 1035 | case 'v': |
| 1036 | return '\v'; |
| 1037 | case '\n': |
| 1038 | return -2; |
| 1039 | case 0: |
| 1040 | (*string_ptr)--; |
| 1041 | return 0; |
| 1042 | case '^': |
| 1043 | c = *(*string_ptr)++; |
| 1044 | if (c == '\\') |
| 1045 | c = parse_escape (string_ptr); |
| 1046 | if (c == '?') |
| 1047 | return 0177; |
| 1048 | return (c & 0200) | (c & 037); |
| 1049 | |
| 1050 | case '0': |
| 1051 | case '1': |
| 1052 | case '2': |
| 1053 | case '3': |
| 1054 | case '4': |
| 1055 | case '5': |
| 1056 | case '6': |
| 1057 | case '7': |
| 1058 | { |
| 1059 | register int i = c - '0'; |
| 1060 | register int count = 0; |
| 1061 | while (++count < 3) |
| 1062 | { |
| 1063 | if ((c = *(*string_ptr)++) >= '0' && c <= '7') |
| 1064 | { |
| 1065 | i *= 8; |
| 1066 | i += c - '0'; |
| 1067 | } |
| 1068 | else |
| 1069 | { |
| 1070 | (*string_ptr)--; |
| 1071 | break; |
| 1072 | } |
| 1073 | } |
| 1074 | return i; |
| 1075 | } |
| 1076 | default: |
| 1077 | return c; |
| 1078 | } |
| 1079 | } |
| 1080 | \f |
| 1081 | /* Print the character C on STREAM as part of the contents of a literal |
| 1082 | string whose delimiter is QUOTER. Note that this routine should only |
| 1083 | be call for printing things which are independent of the language |
| 1084 | of the program being debugged. */ |
| 1085 | |
| 1086 | void |
| 1087 | gdb_printchar (c, stream, quoter) |
| 1088 | register int c; |
| 1089 | FILE *stream; |
| 1090 | int quoter; |
| 1091 | { |
| 1092 | |
| 1093 | c &= 0xFF; /* Avoid sign bit follies */ |
| 1094 | |
| 1095 | if ( c < 0x20 || /* Low control chars */ |
| 1096 | (c >= 0x7F && c < 0xA0) || /* DEL, High controls */ |
| 1097 | (sevenbit_strings && c >= 0x80)) { /* high order bit set */ |
| 1098 | switch (c) |
| 1099 | { |
| 1100 | case '\n': |
| 1101 | fputs_filtered ("\\n", stream); |
| 1102 | break; |
| 1103 | case '\b': |
| 1104 | fputs_filtered ("\\b", stream); |
| 1105 | break; |
| 1106 | case '\t': |
| 1107 | fputs_filtered ("\\t", stream); |
| 1108 | break; |
| 1109 | case '\f': |
| 1110 | fputs_filtered ("\\f", stream); |
| 1111 | break; |
| 1112 | case '\r': |
| 1113 | fputs_filtered ("\\r", stream); |
| 1114 | break; |
| 1115 | case '\033': |
| 1116 | fputs_filtered ("\\e", stream); |
| 1117 | break; |
| 1118 | case '\007': |
| 1119 | fputs_filtered ("\\a", stream); |
| 1120 | break; |
| 1121 | default: |
| 1122 | fprintf_filtered (stream, "\\%.3o", (unsigned int) c); |
| 1123 | break; |
| 1124 | } |
| 1125 | } else { |
| 1126 | if (c == '\\' || c == quoter) |
| 1127 | fputs_filtered ("\\", stream); |
| 1128 | fprintf_filtered (stream, "%c", c); |
| 1129 | } |
| 1130 | } |
| 1131 | \f |
| 1132 | /* Number of lines per page or UINT_MAX if paging is disabled. */ |
| 1133 | static unsigned int lines_per_page; |
| 1134 | /* Number of chars per line or UNIT_MAX is line folding is disabled. */ |
| 1135 | static unsigned int chars_per_line; |
| 1136 | /* Current count of lines printed on this page, chars on this line. */ |
| 1137 | static unsigned int lines_printed, chars_printed; |
| 1138 | |
| 1139 | /* Buffer and start column of buffered text, for doing smarter word- |
| 1140 | wrapping. When someone calls wrap_here(), we start buffering output |
| 1141 | that comes through fputs_filtered(). If we see a newline, we just |
| 1142 | spit it out and forget about the wrap_here(). If we see another |
| 1143 | wrap_here(), we spit it out and remember the newer one. If we see |
| 1144 | the end of the line, we spit out a newline, the indent, and then |
| 1145 | the buffered output. */ |
| 1146 | |
| 1147 | /* Malloc'd buffer with chars_per_line+2 bytes. Contains characters which |
| 1148 | are waiting to be output (they have already been counted in chars_printed). |
| 1149 | When wrap_buffer[0] is null, the buffer is empty. */ |
| 1150 | static char *wrap_buffer; |
| 1151 | |
| 1152 | /* Pointer in wrap_buffer to the next character to fill. */ |
| 1153 | static char *wrap_pointer; |
| 1154 | |
| 1155 | /* String to indent by if the wrap occurs. Must not be NULL if wrap_column |
| 1156 | is non-zero. */ |
| 1157 | static char *wrap_indent; |
| 1158 | |
| 1159 | /* Column number on the screen where wrap_buffer begins, or 0 if wrapping |
| 1160 | is not in effect. */ |
| 1161 | static int wrap_column; |
| 1162 | |
| 1163 | /* ARGSUSED */ |
| 1164 | static void |
| 1165 | set_width_command (args, from_tty, c) |
| 1166 | char *args; |
| 1167 | int from_tty; |
| 1168 | struct cmd_list_element *c; |
| 1169 | { |
| 1170 | if (!wrap_buffer) |
| 1171 | { |
| 1172 | wrap_buffer = (char *) xmalloc (chars_per_line + 2); |
| 1173 | wrap_buffer[0] = '\0'; |
| 1174 | } |
| 1175 | else |
| 1176 | wrap_buffer = (char *) xrealloc (wrap_buffer, chars_per_line + 2); |
| 1177 | wrap_pointer = wrap_buffer; /* Start it at the beginning */ |
| 1178 | } |
| 1179 | |
| 1180 | /* Wait, so the user can read what's on the screen. Prompt the user |
| 1181 | to continue by pressing RETURN. */ |
| 1182 | |
| 1183 | static void |
| 1184 | prompt_for_continue () |
| 1185 | { |
| 1186 | char *ignore; |
| 1187 | char cont_prompt[120]; |
| 1188 | |
| 1189 | if (annotation_level > 1) |
| 1190 | printf_unfiltered ("\n\032\032pre-prompt-for-continue\n"); |
| 1191 | |
| 1192 | strcpy (cont_prompt, |
| 1193 | "---Type <return> to continue, or q <return> to quit---"); |
| 1194 | if (annotation_level > 1) |
| 1195 | strcat (cont_prompt, "\n\032\032prompt-for-continue\n"); |
| 1196 | |
| 1197 | /* We must do this *before* we call gdb_readline, else it will eventually |
| 1198 | call us -- thinking that we're trying to print beyond the end of the |
| 1199 | screen. */ |
| 1200 | reinitialize_more_filter (); |
| 1201 | |
| 1202 | immediate_quit++; |
| 1203 | /* On a real operating system, the user can quit with SIGINT. |
| 1204 | But not on GO32. |
| 1205 | |
| 1206 | 'q' is provided on all systems so users don't have to change habits |
| 1207 | from system to system, and because telling them what to do in |
| 1208 | the prompt is more user-friendly than expecting them to think of |
| 1209 | SIGINT. */ |
| 1210 | /* Call readline, not gdb_readline, because GO32 readline handles control-C |
| 1211 | whereas control-C to gdb_readline will cause the user to get dumped |
| 1212 | out to DOS. */ |
| 1213 | ignore = readline (cont_prompt); |
| 1214 | |
| 1215 | if (annotation_level > 1) |
| 1216 | printf_unfiltered ("\n\032\032post-prompt-for-continue\n"); |
| 1217 | |
| 1218 | if (ignore) |
| 1219 | { |
| 1220 | char *p = ignore; |
| 1221 | while (*p == ' ' || *p == '\t') |
| 1222 | ++p; |
| 1223 | if (p[0] == 'q') |
| 1224 | request_quit (SIGINT); |
| 1225 | free (ignore); |
| 1226 | } |
| 1227 | immediate_quit--; |
| 1228 | |
| 1229 | /* Now we have to do this again, so that GDB will know that it doesn't |
| 1230 | need to save the ---Type <return>--- line at the top of the screen. */ |
| 1231 | reinitialize_more_filter (); |
| 1232 | |
| 1233 | dont_repeat (); /* Forget prev cmd -- CR won't repeat it. */ |
| 1234 | } |
| 1235 | |
| 1236 | /* Reinitialize filter; ie. tell it to reset to original values. */ |
| 1237 | |
| 1238 | void |
| 1239 | reinitialize_more_filter () |
| 1240 | { |
| 1241 | lines_printed = 0; |
| 1242 | chars_printed = 0; |
| 1243 | } |
| 1244 | |
| 1245 | /* Indicate that if the next sequence of characters overflows the line, |
| 1246 | a newline should be inserted here rather than when it hits the end. |
| 1247 | If INDENT is non-null, it is a string to be printed to indent the |
| 1248 | wrapped part on the next line. INDENT must remain accessible until |
| 1249 | the next call to wrap_here() or until a newline is printed through |
| 1250 | fputs_filtered(). |
| 1251 | |
| 1252 | If the line is already overfull, we immediately print a newline and |
| 1253 | the indentation, and disable further wrapping. |
| 1254 | |
| 1255 | If we don't know the width of lines, but we know the page height, |
| 1256 | we must not wrap words, but should still keep track of newlines |
| 1257 | that were explicitly printed. |
| 1258 | |
| 1259 | INDENT should not contain tabs, as that will mess up the char count |
| 1260 | on the next line. FIXME. |
| 1261 | |
| 1262 | This routine is guaranteed to force out any output which has been |
| 1263 | squirreled away in the wrap_buffer, so wrap_here ((char *)0) can be |
| 1264 | used to force out output from the wrap_buffer. */ |
| 1265 | |
| 1266 | void |
| 1267 | wrap_here(indent) |
| 1268 | char *indent; |
| 1269 | { |
| 1270 | /* This should have been allocated, but be paranoid anyway. */ |
| 1271 | if (!wrap_buffer) |
| 1272 | abort (); |
| 1273 | |
| 1274 | if (wrap_buffer[0]) |
| 1275 | { |
| 1276 | *wrap_pointer = '\0'; |
| 1277 | fputs_unfiltered (wrap_buffer, gdb_stdout); |
| 1278 | } |
| 1279 | wrap_pointer = wrap_buffer; |
| 1280 | wrap_buffer[0] = '\0'; |
| 1281 | if (chars_per_line == UINT_MAX) /* No line overflow checking */ |
| 1282 | { |
| 1283 | wrap_column = 0; |
| 1284 | } |
| 1285 | else if (chars_printed >= chars_per_line) |
| 1286 | { |
| 1287 | puts_filtered ("\n"); |
| 1288 | if (indent != NULL) |
| 1289 | puts_filtered (indent); |
| 1290 | wrap_column = 0; |
| 1291 | } |
| 1292 | else |
| 1293 | { |
| 1294 | wrap_column = chars_printed; |
| 1295 | if (indent == NULL) |
| 1296 | wrap_indent = ""; |
| 1297 | else |
| 1298 | wrap_indent = indent; |
| 1299 | } |
| 1300 | } |
| 1301 | |
| 1302 | /* Ensure that whatever gets printed next, using the filtered output |
| 1303 | commands, starts at the beginning of the line. I.E. if there is |
| 1304 | any pending output for the current line, flush it and start a new |
| 1305 | line. Otherwise do nothing. */ |
| 1306 | |
| 1307 | void |
| 1308 | begin_line () |
| 1309 | { |
| 1310 | if (chars_printed > 0) |
| 1311 | { |
| 1312 | puts_filtered ("\n"); |
| 1313 | } |
| 1314 | } |
| 1315 | |
| 1316 | |
| 1317 | GDB_FILE * |
| 1318 | gdb_fopen (name, mode) |
| 1319 | char * name; |
| 1320 | char * mode; |
| 1321 | { |
| 1322 | return fopen (name, mode); |
| 1323 | } |
| 1324 | |
| 1325 | void |
| 1326 | gdb_flush (stream) |
| 1327 | FILE *stream; |
| 1328 | { |
| 1329 | if (flush_hook) |
| 1330 | { |
| 1331 | flush_hook (stream); |
| 1332 | return; |
| 1333 | } |
| 1334 | |
| 1335 | fflush (stream); |
| 1336 | } |
| 1337 | |
| 1338 | /* Like fputs but if FILTER is true, pause after every screenful. |
| 1339 | |
| 1340 | Regardless of FILTER can wrap at points other than the final |
| 1341 | character of a line. |
| 1342 | |
| 1343 | Unlike fputs, fputs_maybe_filtered does not return a value. |
| 1344 | It is OK for LINEBUFFER to be NULL, in which case just don't print |
| 1345 | anything. |
| 1346 | |
| 1347 | Note that a longjmp to top level may occur in this routine (only if |
| 1348 | FILTER is true) (since prompt_for_continue may do so) so this |
| 1349 | routine should not be called when cleanups are not in place. */ |
| 1350 | |
| 1351 | static void |
| 1352 | fputs_maybe_filtered (linebuffer, stream, filter) |
| 1353 | const char *linebuffer; |
| 1354 | FILE *stream; |
| 1355 | int filter; |
| 1356 | { |
| 1357 | const char *lineptr; |
| 1358 | |
| 1359 | if (linebuffer == 0) |
| 1360 | return; |
| 1361 | |
| 1362 | /* Don't do any filtering if it is disabled. */ |
| 1363 | if (stream != gdb_stdout |
| 1364 | || (lines_per_page == UINT_MAX && chars_per_line == UINT_MAX)) |
| 1365 | { |
| 1366 | fputs_unfiltered (linebuffer, stream); |
| 1367 | return; |
| 1368 | } |
| 1369 | |
| 1370 | /* Go through and output each character. Show line extension |
| 1371 | when this is necessary; prompt user for new page when this is |
| 1372 | necessary. */ |
| 1373 | |
| 1374 | lineptr = linebuffer; |
| 1375 | while (*lineptr) |
| 1376 | { |
| 1377 | /* Possible new page. */ |
| 1378 | if (filter && |
| 1379 | (lines_printed >= lines_per_page - 1)) |
| 1380 | prompt_for_continue (); |
| 1381 | |
| 1382 | while (*lineptr && *lineptr != '\n') |
| 1383 | { |
| 1384 | /* Print a single line. */ |
| 1385 | if (*lineptr == '\t') |
| 1386 | { |
| 1387 | if (wrap_column) |
| 1388 | *wrap_pointer++ = '\t'; |
| 1389 | else |
| 1390 | fputc_unfiltered ('\t', stream); |
| 1391 | /* Shifting right by 3 produces the number of tab stops |
| 1392 | we have already passed, and then adding one and |
| 1393 | shifting left 3 advances to the next tab stop. */ |
| 1394 | chars_printed = ((chars_printed >> 3) + 1) << 3; |
| 1395 | lineptr++; |
| 1396 | } |
| 1397 | else |
| 1398 | { |
| 1399 | if (wrap_column) |
| 1400 | *wrap_pointer++ = *lineptr; |
| 1401 | else |
| 1402 | fputc_unfiltered (*lineptr, stream); |
| 1403 | chars_printed++; |
| 1404 | lineptr++; |
| 1405 | } |
| 1406 | |
| 1407 | if (chars_printed >= chars_per_line) |
| 1408 | { |
| 1409 | unsigned int save_chars = chars_printed; |
| 1410 | |
| 1411 | chars_printed = 0; |
| 1412 | lines_printed++; |
| 1413 | /* If we aren't actually wrapping, don't output newline -- |
| 1414 | if chars_per_line is right, we probably just overflowed |
| 1415 | anyway; if it's wrong, let us keep going. */ |
| 1416 | if (wrap_column) |
| 1417 | fputc_unfiltered ('\n', stream); |
| 1418 | |
| 1419 | /* Possible new page. */ |
| 1420 | if (lines_printed >= lines_per_page - 1) |
| 1421 | prompt_for_continue (); |
| 1422 | |
| 1423 | /* Now output indentation and wrapped string */ |
| 1424 | if (wrap_column) |
| 1425 | { |
| 1426 | fputs_unfiltered (wrap_indent, stream); |
| 1427 | *wrap_pointer = '\0'; /* Null-terminate saved stuff */ |
| 1428 | fputs_unfiltered (wrap_buffer, stream); /* and eject it */ |
| 1429 | /* FIXME, this strlen is what prevents wrap_indent from |
| 1430 | containing tabs. However, if we recurse to print it |
| 1431 | and count its chars, we risk trouble if wrap_indent is |
| 1432 | longer than (the user settable) chars_per_line. |
| 1433 | Note also that this can set chars_printed > chars_per_line |
| 1434 | if we are printing a long string. */ |
| 1435 | chars_printed = strlen (wrap_indent) |
| 1436 | + (save_chars - wrap_column); |
| 1437 | wrap_pointer = wrap_buffer; /* Reset buffer */ |
| 1438 | wrap_buffer[0] = '\0'; |
| 1439 | wrap_column = 0; /* And disable fancy wrap */ |
| 1440 | } |
| 1441 | } |
| 1442 | } |
| 1443 | |
| 1444 | if (*lineptr == '\n') |
| 1445 | { |
| 1446 | chars_printed = 0; |
| 1447 | wrap_here ((char *)0); /* Spit out chars, cancel further wraps */ |
| 1448 | lines_printed++; |
| 1449 | fputc_unfiltered ('\n', stream); |
| 1450 | lineptr++; |
| 1451 | } |
| 1452 | } |
| 1453 | } |
| 1454 | |
| 1455 | void |
| 1456 | fputs_filtered (linebuffer, stream) |
| 1457 | const char *linebuffer; |
| 1458 | FILE *stream; |
| 1459 | { |
| 1460 | fputs_maybe_filtered (linebuffer, stream, 1); |
| 1461 | } |
| 1462 | |
| 1463 | int |
| 1464 | putchar_unfiltered (c) |
| 1465 | int c; |
| 1466 | { |
| 1467 | char buf[2]; |
| 1468 | |
| 1469 | buf[0] = c; |
| 1470 | buf[1] = 0; |
| 1471 | fputs_unfiltered (buf, gdb_stdout); |
| 1472 | return c; |
| 1473 | } |
| 1474 | |
| 1475 | int |
| 1476 | fputc_unfiltered (c, stream) |
| 1477 | int c; |
| 1478 | FILE * stream; |
| 1479 | { |
| 1480 | char buf[2]; |
| 1481 | |
| 1482 | buf[0] = c; |
| 1483 | buf[1] = 0; |
| 1484 | fputs_unfiltered (buf, stream); |
| 1485 | return c; |
| 1486 | } |
| 1487 | |
| 1488 | |
| 1489 | /* Print a variable number of ARGS using format FORMAT. If this |
| 1490 | information is going to put the amount written (since the last call |
| 1491 | to REINITIALIZE_MORE_FILTER or the last page break) over the page size, |
| 1492 | call prompt_for_continue to get the users permision to continue. |
| 1493 | |
| 1494 | Unlike fprintf, this function does not return a value. |
| 1495 | |
| 1496 | We implement three variants, vfprintf (takes a vararg list and stream), |
| 1497 | fprintf (takes a stream to write on), and printf (the usual). |
| 1498 | |
| 1499 | Note also that a longjmp to top level may occur in this routine |
| 1500 | (since prompt_for_continue may do so) so this routine should not be |
| 1501 | called when cleanups are not in place. */ |
| 1502 | |
| 1503 | static void |
| 1504 | vfprintf_maybe_filtered (stream, format, args, filter) |
| 1505 | FILE *stream; |
| 1506 | const char *format; |
| 1507 | va_list args; |
| 1508 | int filter; |
| 1509 | { |
| 1510 | char *linebuffer; |
| 1511 | struct cleanup *old_cleanups; |
| 1512 | |
| 1513 | vasprintf (&linebuffer, format, args); |
| 1514 | if (linebuffer == NULL) |
| 1515 | { |
| 1516 | fputs_unfiltered ("\ngdb: virtual memory exhausted.\n", gdb_stderr); |
| 1517 | exit (1); |
| 1518 | } |
| 1519 | old_cleanups = make_cleanup (free, linebuffer); |
| 1520 | fputs_maybe_filtered (linebuffer, stream, filter); |
| 1521 | do_cleanups (old_cleanups); |
| 1522 | } |
| 1523 | |
| 1524 | |
| 1525 | void |
| 1526 | vfprintf_filtered (stream, format, args) |
| 1527 | FILE *stream; |
| 1528 | const char *format; |
| 1529 | va_list args; |
| 1530 | { |
| 1531 | vfprintf_maybe_filtered (stream, format, args, 1); |
| 1532 | } |
| 1533 | |
| 1534 | void |
| 1535 | vfprintf_unfiltered (stream, format, args) |
| 1536 | FILE *stream; |
| 1537 | const char *format; |
| 1538 | va_list args; |
| 1539 | { |
| 1540 | char *linebuffer; |
| 1541 | struct cleanup *old_cleanups; |
| 1542 | |
| 1543 | vasprintf (&linebuffer, format, args); |
| 1544 | if (linebuffer == NULL) |
| 1545 | { |
| 1546 | fputs_unfiltered ("\ngdb: virtual memory exhausted.\n", gdb_stderr); |
| 1547 | exit (1); |
| 1548 | } |
| 1549 | old_cleanups = make_cleanup (free, linebuffer); |
| 1550 | fputs_unfiltered (linebuffer, stream); |
| 1551 | do_cleanups (old_cleanups); |
| 1552 | } |
| 1553 | |
| 1554 | void |
| 1555 | vprintf_filtered (format, args) |
| 1556 | const char *format; |
| 1557 | va_list args; |
| 1558 | { |
| 1559 | vfprintf_maybe_filtered (gdb_stdout, format, args, 1); |
| 1560 | } |
| 1561 | |
| 1562 | void |
| 1563 | vprintf_unfiltered (format, args) |
| 1564 | const char *format; |
| 1565 | va_list args; |
| 1566 | { |
| 1567 | vfprintf_unfiltered (gdb_stdout, format, args); |
| 1568 | } |
| 1569 | |
| 1570 | /* VARARGS */ |
| 1571 | void |
| 1572 | #ifdef ANSI_PROTOTYPES |
| 1573 | fprintf_filtered (FILE *stream, const char *format, ...) |
| 1574 | #else |
| 1575 | fprintf_filtered (va_alist) |
| 1576 | va_dcl |
| 1577 | #endif |
| 1578 | { |
| 1579 | va_list args; |
| 1580 | #ifdef ANSI_PROTOTYPES |
| 1581 | va_start (args, format); |
| 1582 | #else |
| 1583 | FILE *stream; |
| 1584 | char *format; |
| 1585 | |
| 1586 | va_start (args); |
| 1587 | stream = va_arg (args, FILE *); |
| 1588 | format = va_arg (args, char *); |
| 1589 | #endif |
| 1590 | vfprintf_filtered (stream, format, args); |
| 1591 | va_end (args); |
| 1592 | } |
| 1593 | |
| 1594 | /* VARARGS */ |
| 1595 | void |
| 1596 | #ifdef ANSI_PROTOTYPES |
| 1597 | fprintf_unfiltered (FILE *stream, const char *format, ...) |
| 1598 | #else |
| 1599 | fprintf_unfiltered (va_alist) |
| 1600 | va_dcl |
| 1601 | #endif |
| 1602 | { |
| 1603 | va_list args; |
| 1604 | #ifdef ANSI_PROTOTYPES |
| 1605 | va_start (args, format); |
| 1606 | #else |
| 1607 | FILE *stream; |
| 1608 | char *format; |
| 1609 | |
| 1610 | va_start (args); |
| 1611 | stream = va_arg (args, FILE *); |
| 1612 | format = va_arg (args, char *); |
| 1613 | #endif |
| 1614 | vfprintf_unfiltered (stream, format, args); |
| 1615 | va_end (args); |
| 1616 | } |
| 1617 | |
| 1618 | /* Like fprintf_filtered, but prints its result indented. |
| 1619 | Called as fprintfi_filtered (spaces, stream, format, ...); */ |
| 1620 | |
| 1621 | /* VARARGS */ |
| 1622 | void |
| 1623 | #ifdef ANSI_PROTOTYPES |
| 1624 | fprintfi_filtered (int spaces, FILE *stream, const char *format, ...) |
| 1625 | #else |
| 1626 | fprintfi_filtered (va_alist) |
| 1627 | va_dcl |
| 1628 | #endif |
| 1629 | { |
| 1630 | va_list args; |
| 1631 | #ifdef ANSI_PROTOTYPES |
| 1632 | va_start (args, format); |
| 1633 | #else |
| 1634 | int spaces; |
| 1635 | FILE *stream; |
| 1636 | char *format; |
| 1637 | |
| 1638 | va_start (args); |
| 1639 | spaces = va_arg (args, int); |
| 1640 | stream = va_arg (args, FILE *); |
| 1641 | format = va_arg (args, char *); |
| 1642 | #endif |
| 1643 | print_spaces_filtered (spaces, stream); |
| 1644 | |
| 1645 | vfprintf_filtered (stream, format, args); |
| 1646 | va_end (args); |
| 1647 | } |
| 1648 | |
| 1649 | |
| 1650 | /* VARARGS */ |
| 1651 | void |
| 1652 | #ifdef ANSI_PROTOTYPES |
| 1653 | printf_filtered (const char *format, ...) |
| 1654 | #else |
| 1655 | printf_filtered (va_alist) |
| 1656 | va_dcl |
| 1657 | #endif |
| 1658 | { |
| 1659 | va_list args; |
| 1660 | #ifdef ANSI_PROTOTYPES |
| 1661 | va_start (args, format); |
| 1662 | #else |
| 1663 | char *format; |
| 1664 | |
| 1665 | va_start (args); |
| 1666 | format = va_arg (args, char *); |
| 1667 | #endif |
| 1668 | vfprintf_filtered (gdb_stdout, format, args); |
| 1669 | va_end (args); |
| 1670 | } |
| 1671 | |
| 1672 | |
| 1673 | /* VARARGS */ |
| 1674 | void |
| 1675 | #ifdef ANSI_PROTOTYPES |
| 1676 | printf_unfiltered (const char *format, ...) |
| 1677 | #else |
| 1678 | printf_unfiltered (va_alist) |
| 1679 | va_dcl |
| 1680 | #endif |
| 1681 | { |
| 1682 | va_list args; |
| 1683 | #ifdef ANSI_PROTOTYPES |
| 1684 | va_start (args, format); |
| 1685 | #else |
| 1686 | char *format; |
| 1687 | |
| 1688 | va_start (args); |
| 1689 | format = va_arg (args, char *); |
| 1690 | #endif |
| 1691 | vfprintf_unfiltered (gdb_stdout, format, args); |
| 1692 | va_end (args); |
| 1693 | } |
| 1694 | |
| 1695 | /* Like printf_filtered, but prints it's result indented. |
| 1696 | Called as printfi_filtered (spaces, format, ...); */ |
| 1697 | |
| 1698 | /* VARARGS */ |
| 1699 | void |
| 1700 | #ifdef ANSI_PROTOTYPES |
| 1701 | printfi_filtered (int spaces, const char *format, ...) |
| 1702 | #else |
| 1703 | printfi_filtered (va_alist) |
| 1704 | va_dcl |
| 1705 | #endif |
| 1706 | { |
| 1707 | va_list args; |
| 1708 | #ifdef ANSI_PROTOTYPES |
| 1709 | va_start (args, format); |
| 1710 | #else |
| 1711 | int spaces; |
| 1712 | char *format; |
| 1713 | |
| 1714 | va_start (args); |
| 1715 | spaces = va_arg (args, int); |
| 1716 | format = va_arg (args, char *); |
| 1717 | #endif |
| 1718 | print_spaces_filtered (spaces, gdb_stdout); |
| 1719 | vfprintf_filtered (gdb_stdout, format, args); |
| 1720 | va_end (args); |
| 1721 | } |
| 1722 | |
| 1723 | /* Easy -- but watch out! |
| 1724 | |
| 1725 | This routine is *not* a replacement for puts()! puts() appends a newline. |
| 1726 | This one doesn't, and had better not! */ |
| 1727 | |
| 1728 | void |
| 1729 | puts_filtered (string) |
| 1730 | const char *string; |
| 1731 | { |
| 1732 | fputs_filtered (string, gdb_stdout); |
| 1733 | } |
| 1734 | |
| 1735 | void |
| 1736 | puts_unfiltered (string) |
| 1737 | const char *string; |
| 1738 | { |
| 1739 | fputs_unfiltered (string, gdb_stdout); |
| 1740 | } |
| 1741 | |
| 1742 | /* Return a pointer to N spaces and a null. The pointer is good |
| 1743 | until the next call to here. */ |
| 1744 | char * |
| 1745 | n_spaces (n) |
| 1746 | int n; |
| 1747 | { |
| 1748 | register char *t; |
| 1749 | static char *spaces; |
| 1750 | static int max_spaces; |
| 1751 | |
| 1752 | if (n > max_spaces) |
| 1753 | { |
| 1754 | if (spaces) |
| 1755 | free (spaces); |
| 1756 | spaces = (char *) xmalloc (n+1); |
| 1757 | for (t = spaces+n; t != spaces;) |
| 1758 | *--t = ' '; |
| 1759 | spaces[n] = '\0'; |
| 1760 | max_spaces = n; |
| 1761 | } |
| 1762 | |
| 1763 | return spaces + max_spaces - n; |
| 1764 | } |
| 1765 | |
| 1766 | /* Print N spaces. */ |
| 1767 | void |
| 1768 | print_spaces_filtered (n, stream) |
| 1769 | int n; |
| 1770 | FILE *stream; |
| 1771 | { |
| 1772 | fputs_filtered (n_spaces (n), stream); |
| 1773 | } |
| 1774 | \f |
| 1775 | /* C++ demangler stuff. */ |
| 1776 | |
| 1777 | /* fprintf_symbol_filtered attempts to demangle NAME, a symbol in language |
| 1778 | LANG, using demangling args ARG_MODE, and print it filtered to STREAM. |
| 1779 | If the name is not mangled, or the language for the name is unknown, or |
| 1780 | demangling is off, the name is printed in its "raw" form. */ |
| 1781 | |
| 1782 | void |
| 1783 | fprintf_symbol_filtered (stream, name, lang, arg_mode) |
| 1784 | FILE *stream; |
| 1785 | char *name; |
| 1786 | enum language lang; |
| 1787 | int arg_mode; |
| 1788 | { |
| 1789 | char *demangled; |
| 1790 | |
| 1791 | if (name != NULL) |
| 1792 | { |
| 1793 | /* If user wants to see raw output, no problem. */ |
| 1794 | if (!demangle) |
| 1795 | { |
| 1796 | fputs_filtered (name, stream); |
| 1797 | } |
| 1798 | else |
| 1799 | { |
| 1800 | switch (lang) |
| 1801 | { |
| 1802 | case language_cplus: |
| 1803 | demangled = cplus_demangle (name, arg_mode); |
| 1804 | break; |
| 1805 | case language_chill: |
| 1806 | demangled = chill_demangle (name); |
| 1807 | break; |
| 1808 | default: |
| 1809 | demangled = NULL; |
| 1810 | break; |
| 1811 | } |
| 1812 | fputs_filtered (demangled ? demangled : name, stream); |
| 1813 | if (demangled != NULL) |
| 1814 | { |
| 1815 | free (demangled); |
| 1816 | } |
| 1817 | } |
| 1818 | } |
| 1819 | } |
| 1820 | |
| 1821 | /* Do a strcmp() type operation on STRING1 and STRING2, ignoring any |
| 1822 | differences in whitespace. Returns 0 if they match, non-zero if they |
| 1823 | don't (slightly different than strcmp()'s range of return values). |
| 1824 | |
| 1825 | As an extra hack, string1=="FOO(ARGS)" matches string2=="FOO". |
| 1826 | This "feature" is useful when searching for matching C++ function names |
| 1827 | (such as if the user types 'break FOO', where FOO is a mangled C++ |
| 1828 | function). */ |
| 1829 | |
| 1830 | int |
| 1831 | strcmp_iw (string1, string2) |
| 1832 | const char *string1; |
| 1833 | const char *string2; |
| 1834 | { |
| 1835 | while ((*string1 != '\0') && (*string2 != '\0')) |
| 1836 | { |
| 1837 | while (isspace (*string1)) |
| 1838 | { |
| 1839 | string1++; |
| 1840 | } |
| 1841 | while (isspace (*string2)) |
| 1842 | { |
| 1843 | string2++; |
| 1844 | } |
| 1845 | if (*string1 != *string2) |
| 1846 | { |
| 1847 | break; |
| 1848 | } |
| 1849 | if (*string1 != '\0') |
| 1850 | { |
| 1851 | string1++; |
| 1852 | string2++; |
| 1853 | } |
| 1854 | } |
| 1855 | return (*string1 != '\0' && *string1 != '(') || (*string2 != '\0'); |
| 1856 | } |
| 1857 | |
| 1858 | \f |
| 1859 | void |
| 1860 | initialize_utils () |
| 1861 | { |
| 1862 | struct cmd_list_element *c; |
| 1863 | |
| 1864 | c = add_set_cmd ("width", class_support, var_uinteger, |
| 1865 | (char *)&chars_per_line, |
| 1866 | "Set number of characters gdb thinks are in a line.", |
| 1867 | &setlist); |
| 1868 | add_show_from_set (c, &showlist); |
| 1869 | c->function.sfunc = set_width_command; |
| 1870 | |
| 1871 | add_show_from_set |
| 1872 | (add_set_cmd ("height", class_support, |
| 1873 | var_uinteger, (char *)&lines_per_page, |
| 1874 | "Set number of lines gdb thinks are in a page.", &setlist), |
| 1875 | &showlist); |
| 1876 | |
| 1877 | /* These defaults will be used if we are unable to get the correct |
| 1878 | values from termcap. */ |
| 1879 | #if defined(__GO32__) || defined(__WIN32__) |
| 1880 | lines_per_page = ScreenRows(); |
| 1881 | chars_per_line = ScreenCols(); |
| 1882 | #else |
| 1883 | lines_per_page = 24; |
| 1884 | chars_per_line = 80; |
| 1885 | |
| 1886 | #ifndef MPW |
| 1887 | /* No termcap under MPW, although might be cool to do something |
| 1888 | by looking at worksheet or console window sizes. */ |
| 1889 | /* Initialize the screen height and width from termcap. */ |
| 1890 | { |
| 1891 | char *termtype = getenv ("TERM"); |
| 1892 | |
| 1893 | /* Positive means success, nonpositive means failure. */ |
| 1894 | int status; |
| 1895 | |
| 1896 | /* 2048 is large enough for all known terminals, according to the |
| 1897 | GNU termcap manual. */ |
| 1898 | char term_buffer[2048]; |
| 1899 | |
| 1900 | if (termtype) |
| 1901 | { |
| 1902 | status = tgetent (term_buffer, termtype); |
| 1903 | if (status > 0) |
| 1904 | { |
| 1905 | int val; |
| 1906 | |
| 1907 | val = tgetnum ("li"); |
| 1908 | if (val >= 0) |
| 1909 | lines_per_page = val; |
| 1910 | else |
| 1911 | /* The number of lines per page is not mentioned |
| 1912 | in the terminal description. This probably means |
| 1913 | that paging is not useful (e.g. emacs shell window), |
| 1914 | so disable paging. */ |
| 1915 | lines_per_page = UINT_MAX; |
| 1916 | |
| 1917 | val = tgetnum ("co"); |
| 1918 | if (val >= 0) |
| 1919 | chars_per_line = val; |
| 1920 | } |
| 1921 | } |
| 1922 | } |
| 1923 | #endif /* MPW */ |
| 1924 | |
| 1925 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) |
| 1926 | |
| 1927 | /* If there is a better way to determine the window size, use it. */ |
| 1928 | SIGWINCH_HANDLER (); |
| 1929 | #endif |
| 1930 | #endif |
| 1931 | /* If the output is not a terminal, don't paginate it. */ |
| 1932 | if (!ISATTY (gdb_stdout)) |
| 1933 | lines_per_page = UINT_MAX; |
| 1934 | |
| 1935 | set_width_command ((char *)NULL, 0, c); |
| 1936 | |
| 1937 | add_show_from_set |
| 1938 | (add_set_cmd ("demangle", class_support, var_boolean, |
| 1939 | (char *)&demangle, |
| 1940 | "Set demangling of encoded C++ names when displaying symbols.", |
| 1941 | &setprintlist), |
| 1942 | &showprintlist); |
| 1943 | |
| 1944 | add_show_from_set |
| 1945 | (add_set_cmd ("sevenbit-strings", class_support, var_boolean, |
| 1946 | (char *)&sevenbit_strings, |
| 1947 | "Set printing of 8-bit characters in strings as \\nnn.", |
| 1948 | &setprintlist), |
| 1949 | &showprintlist); |
| 1950 | |
| 1951 | add_show_from_set |
| 1952 | (add_set_cmd ("asm-demangle", class_support, var_boolean, |
| 1953 | (char *)&asm_demangle, |
| 1954 | "Set demangling of C++ names in disassembly listings.", |
| 1955 | &setprintlist), |
| 1956 | &showprintlist); |
| 1957 | } |
| 1958 | |
| 1959 | /* Machine specific function to handle SIGWINCH signal. */ |
| 1960 | |
| 1961 | #ifdef SIGWINCH_HANDLER_BODY |
| 1962 | SIGWINCH_HANDLER_BODY |
| 1963 | #endif |
| 1964 | \f |
| 1965 | /* Support for converting target fp numbers into host DOUBLEST format. */ |
| 1966 | |
| 1967 | /* XXX - This code should really be in libiberty/floatformat.c, however |
| 1968 | configuration issues with libiberty made this very difficult to do in the |
| 1969 | available time. */ |
| 1970 | |
| 1971 | #include "floatformat.h" |
| 1972 | #include <math.h> /* ldexp */ |
| 1973 | |
| 1974 | /* The odds that CHAR_BIT will be anything but 8 are low enough that I'm not |
| 1975 | going to bother with trying to muck around with whether it is defined in |
| 1976 | a system header, what we do if not, etc. */ |
| 1977 | #define FLOATFORMAT_CHAR_BIT 8 |
| 1978 | |
| 1979 | static unsigned long get_field PARAMS ((unsigned char *, |
| 1980 | enum floatformat_byteorders, |
| 1981 | unsigned int, |
| 1982 | unsigned int, |
| 1983 | unsigned int)); |
| 1984 | |
| 1985 | /* Extract a field which starts at START and is LEN bytes long. DATA and |
| 1986 | TOTAL_LEN are the thing we are extracting it from, in byteorder ORDER. */ |
| 1987 | static unsigned long |
| 1988 | get_field (data, order, total_len, start, len) |
| 1989 | unsigned char *data; |
| 1990 | enum floatformat_byteorders order; |
| 1991 | unsigned int total_len; |
| 1992 | unsigned int start; |
| 1993 | unsigned int len; |
| 1994 | { |
| 1995 | unsigned long result; |
| 1996 | unsigned int cur_byte; |
| 1997 | int cur_bitshift; |
| 1998 | |
| 1999 | /* Start at the least significant part of the field. */ |
| 2000 | cur_byte = (start + len) / FLOATFORMAT_CHAR_BIT; |
| 2001 | if (order == floatformat_little) |
| 2002 | cur_byte = (total_len / FLOATFORMAT_CHAR_BIT) - cur_byte - 1; |
| 2003 | cur_bitshift = |
| 2004 | ((start + len) % FLOATFORMAT_CHAR_BIT) - FLOATFORMAT_CHAR_BIT; |
| 2005 | result = *(data + cur_byte) >> (-cur_bitshift); |
| 2006 | cur_bitshift += FLOATFORMAT_CHAR_BIT; |
| 2007 | if (order == floatformat_little) |
| 2008 | ++cur_byte; |
| 2009 | else |
| 2010 | --cur_byte; |
| 2011 | |
| 2012 | /* Move towards the most significant part of the field. */ |
| 2013 | while (cur_bitshift < len) |
| 2014 | { |
| 2015 | if (len - cur_bitshift < FLOATFORMAT_CHAR_BIT) |
| 2016 | /* This is the last byte; zero out the bits which are not part of |
| 2017 | this field. */ |
| 2018 | result |= |
| 2019 | (*(data + cur_byte) & ((1 << (len - cur_bitshift)) - 1)) |
| 2020 | << cur_bitshift; |
| 2021 | else |
| 2022 | result |= *(data + cur_byte) << cur_bitshift; |
| 2023 | cur_bitshift += FLOATFORMAT_CHAR_BIT; |
| 2024 | if (order == floatformat_little) |
| 2025 | ++cur_byte; |
| 2026 | else |
| 2027 | --cur_byte; |
| 2028 | } |
| 2029 | return result; |
| 2030 | } |
| 2031 | |
| 2032 | /* Convert from FMT to a DOUBLEST. |
| 2033 | FROM is the address of the extended float. |
| 2034 | Store the DOUBLEST in *TO. */ |
| 2035 | |
| 2036 | void |
| 2037 | floatformat_to_doublest (fmt, from, to) |
| 2038 | const struct floatformat *fmt; |
| 2039 | char *from; |
| 2040 | DOUBLEST *to; |
| 2041 | { |
| 2042 | unsigned char *ufrom = (unsigned char *)from; |
| 2043 | DOUBLEST dto; |
| 2044 | long exponent; |
| 2045 | unsigned long mant; |
| 2046 | unsigned int mant_bits, mant_off; |
| 2047 | int mant_bits_left; |
| 2048 | int special_exponent; /* It's a NaN, denorm or zero */ |
| 2049 | |
| 2050 | exponent = get_field (ufrom, fmt->byteorder, fmt->totalsize, |
| 2051 | fmt->exp_start, fmt->exp_len); |
| 2052 | /* Note that if exponent indicates a NaN, we can't really do anything useful |
| 2053 | (not knowing if the host has NaN's, or how to build one). So it will |
| 2054 | end up as an infinity or something close; that is OK. */ |
| 2055 | |
| 2056 | mant_bits_left = fmt->man_len; |
| 2057 | mant_off = fmt->man_start; |
| 2058 | dto = 0.0; |
| 2059 | |
| 2060 | special_exponent = exponent == 0 || exponent == fmt->exp_nan; |
| 2061 | |
| 2062 | /* Don't bias zero's, denorms or NaNs. */ |
| 2063 | if (!special_exponent) |
| 2064 | exponent -= fmt->exp_bias; |
| 2065 | |
| 2066 | /* Build the result algebraically. Might go infinite, underflow, etc; |
| 2067 | who cares. */ |
| 2068 | |
| 2069 | /* If this format uses a hidden bit, explicitly add it in now. Otherwise, |
| 2070 | increment the exponent by one to account for the integer bit. */ |
| 2071 | |
| 2072 | if (!special_exponent) |
| 2073 | if (fmt->intbit == floatformat_intbit_no) |
| 2074 | dto = ldexp (1.0, exponent); |
| 2075 | else |
| 2076 | exponent++; |
| 2077 | |
| 2078 | while (mant_bits_left > 0) |
| 2079 | { |
| 2080 | mant_bits = min (mant_bits_left, 32); |
| 2081 | |
| 2082 | mant = get_field (ufrom, fmt->byteorder, fmt->totalsize, |
| 2083 | mant_off, mant_bits); |
| 2084 | |
| 2085 | dto += ldexp ((double)mant, exponent - mant_bits); |
| 2086 | exponent -= mant_bits; |
| 2087 | mant_off += mant_bits; |
| 2088 | mant_bits_left -= mant_bits; |
| 2089 | } |
| 2090 | |
| 2091 | /* Negate it if negative. */ |
| 2092 | if (get_field (ufrom, fmt->byteorder, fmt->totalsize, fmt->sign_start, 1)) |
| 2093 | dto = -dto; |
| 2094 | *to = dto; |
| 2095 | } |
| 2096 | \f |
| 2097 | static void put_field PARAMS ((unsigned char *, enum floatformat_byteorders, |
| 2098 | unsigned int, |
| 2099 | unsigned int, |
| 2100 | unsigned int, |
| 2101 | unsigned long)); |
| 2102 | |
| 2103 | /* Set a field which starts at START and is LEN bytes long. DATA and |
| 2104 | TOTAL_LEN are the thing we are extracting it from, in byteorder ORDER. */ |
| 2105 | static void |
| 2106 | put_field (data, order, total_len, start, len, stuff_to_put) |
| 2107 | unsigned char *data; |
| 2108 | enum floatformat_byteorders order; |
| 2109 | unsigned int total_len; |
| 2110 | unsigned int start; |
| 2111 | unsigned int len; |
| 2112 | unsigned long stuff_to_put; |
| 2113 | { |
| 2114 | unsigned int cur_byte; |
| 2115 | int cur_bitshift; |
| 2116 | |
| 2117 | /* Start at the least significant part of the field. */ |
| 2118 | cur_byte = (start + len) / FLOATFORMAT_CHAR_BIT; |
| 2119 | if (order == floatformat_little) |
| 2120 | cur_byte = (total_len / FLOATFORMAT_CHAR_BIT) - cur_byte - 1; |
| 2121 | cur_bitshift = |
| 2122 | ((start + len) % FLOATFORMAT_CHAR_BIT) - FLOATFORMAT_CHAR_BIT; |
| 2123 | *(data + cur_byte) &= |
| 2124 | ~(((1 << ((start + len) % FLOATFORMAT_CHAR_BIT)) - 1) << (-cur_bitshift)); |
| 2125 | *(data + cur_byte) |= |
| 2126 | (stuff_to_put & ((1 << FLOATFORMAT_CHAR_BIT) - 1)) << (-cur_bitshift); |
| 2127 | cur_bitshift += FLOATFORMAT_CHAR_BIT; |
| 2128 | if (order == floatformat_little) |
| 2129 | ++cur_byte; |
| 2130 | else |
| 2131 | --cur_byte; |
| 2132 | |
| 2133 | /* Move towards the most significant part of the field. */ |
| 2134 | while (cur_bitshift < len) |
| 2135 | { |
| 2136 | if (len - cur_bitshift < FLOATFORMAT_CHAR_BIT) |
| 2137 | { |
| 2138 | /* This is the last byte. */ |
| 2139 | *(data + cur_byte) &= |
| 2140 | ~((1 << (len - cur_bitshift)) - 1); |
| 2141 | *(data + cur_byte) |= (stuff_to_put >> cur_bitshift); |
| 2142 | } |
| 2143 | else |
| 2144 | *(data + cur_byte) = ((stuff_to_put >> cur_bitshift) |
| 2145 | & ((1 << FLOATFORMAT_CHAR_BIT) - 1)); |
| 2146 | cur_bitshift += FLOATFORMAT_CHAR_BIT; |
| 2147 | if (order == floatformat_little) |
| 2148 | ++cur_byte; |
| 2149 | else |
| 2150 | --cur_byte; |
| 2151 | } |
| 2152 | } |
| 2153 | |
| 2154 | #ifdef HAVE_LONG_DOUBLE |
| 2155 | /* Return the fractional part of VALUE, and put the exponent of VALUE in *EPTR. |
| 2156 | The range of the returned value is >= 0.5 and < 1.0. This is equivalent to |
| 2157 | frexp, but operates on the long double data type. */ |
| 2158 | |
| 2159 | static long double ldfrexp PARAMS ((long double value, int *eptr)); |
| 2160 | |
| 2161 | static long double |
| 2162 | ldfrexp (value, eptr) |
| 2163 | long double value; |
| 2164 | int *eptr; |
| 2165 | { |
| 2166 | long double tmp; |
| 2167 | int exp; |
| 2168 | |
| 2169 | /* Unfortunately, there are no portable functions for extracting the exponent |
| 2170 | of a long double, so we have to do it iteratively by multiplying or dividing |
| 2171 | by two until the fraction is between 0.5 and 1.0. */ |
| 2172 | |
| 2173 | if (value < 0.0l) |
| 2174 | value = -value; |
| 2175 | |
| 2176 | tmp = 1.0l; |
| 2177 | exp = 0; |
| 2178 | |
| 2179 | if (value >= tmp) /* Value >= 1.0 */ |
| 2180 | while (value >= tmp) |
| 2181 | { |
| 2182 | tmp *= 2.0l; |
| 2183 | exp++; |
| 2184 | } |
| 2185 | else if (value != 0.0l) /* Value < 1.0 and > 0.0 */ |
| 2186 | { |
| 2187 | while (value < tmp) |
| 2188 | { |
| 2189 | tmp /= 2.0l; |
| 2190 | exp--; |
| 2191 | } |
| 2192 | tmp *= 2.0l; |
| 2193 | exp++; |
| 2194 | } |
| 2195 | |
| 2196 | *eptr = exp; |
| 2197 | return value/tmp; |
| 2198 | } |
| 2199 | #endif /* HAVE_LONG_DOUBLE */ |
| 2200 | |
| 2201 | |
| 2202 | /* The converse: convert the DOUBLEST *FROM to an extended float |
| 2203 | and store where TO points. Neither FROM nor TO have any alignment |
| 2204 | restrictions. */ |
| 2205 | |
| 2206 | void |
| 2207 | floatformat_from_doublest (fmt, from, to) |
| 2208 | CONST struct floatformat *fmt; |
| 2209 | DOUBLEST *from; |
| 2210 | char *to; |
| 2211 | { |
| 2212 | DOUBLEST dfrom; |
| 2213 | int exponent; |
| 2214 | DOUBLEST mant; |
| 2215 | unsigned int mant_bits, mant_off; |
| 2216 | int mant_bits_left; |
| 2217 | unsigned char *uto = (unsigned char *)to; |
| 2218 | |
| 2219 | memcpy (&dfrom, from, sizeof (dfrom)); |
| 2220 | memset (uto, 0, fmt->totalsize / FLOATFORMAT_CHAR_BIT); |
| 2221 | if (dfrom == 0) |
| 2222 | return; /* Result is zero */ |
| 2223 | if (dfrom != dfrom) |
| 2224 | { |
| 2225 | /* From is NaN */ |
| 2226 | put_field (uto, fmt->byteorder, fmt->totalsize, fmt->exp_start, |
| 2227 | fmt->exp_len, fmt->exp_nan); |
| 2228 | /* Be sure it's not infinity, but NaN value is irrel */ |
| 2229 | put_field (uto, fmt->byteorder, fmt->totalsize, fmt->man_start, |
| 2230 | 32, 1); |
| 2231 | return; |
| 2232 | } |
| 2233 | |
| 2234 | /* If negative, set the sign bit. */ |
| 2235 | if (dfrom < 0) |
| 2236 | { |
| 2237 | put_field (uto, fmt->byteorder, fmt->totalsize, fmt->sign_start, 1, 1); |
| 2238 | dfrom = -dfrom; |
| 2239 | } |
| 2240 | |
| 2241 | /* How to tell an infinity from an ordinary number? FIXME-someday */ |
| 2242 | |
| 2243 | #ifdef HAVE_LONG_DOUBLE |
| 2244 | mant = ldfrexp (dfrom, &exponent); |
| 2245 | #else |
| 2246 | mant = frexp (dfrom, &exponent); |
| 2247 | #endif |
| 2248 | |
| 2249 | put_field (uto, fmt->byteorder, fmt->totalsize, fmt->exp_start, fmt->exp_len, |
| 2250 | exponent + fmt->exp_bias - 1); |
| 2251 | |
| 2252 | mant_bits_left = fmt->man_len; |
| 2253 | mant_off = fmt->man_start; |
| 2254 | while (mant_bits_left > 0) |
| 2255 | { |
| 2256 | unsigned long mant_long; |
| 2257 | mant_bits = mant_bits_left < 32 ? mant_bits_left : 32; |
| 2258 | |
| 2259 | mant *= 4294967296.0; |
| 2260 | mant_long = (unsigned long)mant; |
| 2261 | mant -= mant_long; |
| 2262 | |
| 2263 | /* If the integer bit is implicit, then we need to discard it. |
| 2264 | If we are discarding a zero, we should be (but are not) creating |
| 2265 | a denormalized number which means adjusting the exponent |
| 2266 | (I think). */ |
| 2267 | if (mant_bits_left == fmt->man_len |
| 2268 | && fmt->intbit == floatformat_intbit_no) |
| 2269 | { |
| 2270 | mant_long &= 0x7fffffff; |
| 2271 | mant_bits -= 1; |
| 2272 | } |
| 2273 | else if (mant_bits < 32) |
| 2274 | { |
| 2275 | /* The bits we want are in the most significant MANT_BITS bits of |
| 2276 | mant_long. Move them to the least significant. */ |
| 2277 | mant_long >>= 32 - mant_bits; |
| 2278 | } |
| 2279 | |
| 2280 | put_field (uto, fmt->byteorder, fmt->totalsize, |
| 2281 | mant_off, mant_bits, mant_long); |
| 2282 | mant_off += mant_bits; |
| 2283 | mant_bits_left -= mant_bits; |
| 2284 | } |
| 2285 | } |