1 /* General utility routines for GDB, the GNU debugger.
2 Copyright 1986, 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
4 This file is part of GDB.
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.
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.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
21 #if !defined(__GO32__)
22 #include <sys/ioctl.h>
23 #include <sys/param.h>
36 #include "expression.h"
42 /* readline defines this. */
45 /* Prototypes for local functions */
47 #if defined (NO_MMALLOC) || defined (NO_MMALLOC_CHECK)
51 malloc_botch
PARAMS ((void));
53 #endif /* NO_MMALLOC, etc */
56 fatal_dump_core (); /* Can't prototype with <varargs.h> usage... */
59 prompt_for_continue
PARAMS ((void));
62 set_width_command
PARAMS ((char *, int, struct cmd_list_element
*));
64 /* If this definition isn't overridden by the header files, assume
65 that isatty and fileno exist on this system. */
67 #define ISATTY(FP) (isatty (fileno (FP)))
70 /* Chain of cleanup actions established with make_cleanup,
71 to be executed if an error happens. */
73 static struct cleanup
*cleanup_chain
;
75 /* Nonzero if we have job control. */
79 /* Nonzero means a quit has been requested. */
83 /* Nonzero means quit immediately if Control-C is typed now, rather
84 than waiting until QUIT is executed. Be careful in setting this;
85 code which executes with immediate_quit set has to be very careful
86 about being able to deal with being interrupted at any time. It is
87 almost always better to use QUIT; the only exception I can think of
88 is being able to quit out of a system call (using EINTR loses if
89 the SIGINT happens between the previous QUIT and the system call).
90 To immediately quit in the case in which a SIGINT happens between
91 the previous QUIT and setting immediate_quit (desirable anytime we
92 expect to block), call QUIT after setting immediate_quit. */
96 /* Nonzero means that encoded C++ names should be printed out in their
97 C++ form rather than raw. */
101 /* Nonzero means that encoded C++ names should be printed out in their
102 C++ form even in assembler language displays. If this is set, but
103 DEMANGLE is zero, names are printed raw, i.e. DEMANGLE controls. */
105 int asm_demangle
= 0;
107 /* Nonzero means that strings with character values >0x7F should be printed
108 as octal escapes. Zero means just print the value (e.g. it's an
109 international character, and the terminal or window can cope.) */
111 int sevenbit_strings
= 0;
113 /* String to be printed before error messages, if any. */
115 char *error_pre_print
;
116 char *warning_pre_print
= "\nwarning: ";
118 /* Add a new cleanup to the cleanup_chain,
119 and return the previous chain pointer
120 to be passed later to do_cleanups or discard_cleanups.
121 Args are FUNCTION to clean up with, and ARG to pass to it. */
124 make_cleanup (function
, arg
)
125 void (*function
) PARAMS ((PTR
));
128 register struct cleanup
*new
129 = (struct cleanup
*) xmalloc (sizeof (struct cleanup
));
130 register struct cleanup
*old_chain
= cleanup_chain
;
132 new->next
= cleanup_chain
;
133 new->function
= function
;
140 /* Discard cleanups and do the actions they describe
141 until we get back to the point OLD_CHAIN in the cleanup_chain. */
144 do_cleanups (old_chain
)
145 register struct cleanup
*old_chain
;
147 register struct cleanup
*ptr
;
148 while ((ptr
= cleanup_chain
) != old_chain
)
150 cleanup_chain
= ptr
->next
; /* Do this first incase recursion */
151 (*ptr
->function
) (ptr
->arg
);
156 /* Discard cleanups, not doing the actions they describe,
157 until we get back to the point OLD_CHAIN in the cleanup_chain. */
160 discard_cleanups (old_chain
)
161 register struct cleanup
*old_chain
;
163 register struct cleanup
*ptr
;
164 while ((ptr
= cleanup_chain
) != old_chain
)
166 cleanup_chain
= ptr
->next
;
171 /* Set the cleanup_chain to 0, and return the old cleanup chain. */
175 struct cleanup
*old_chain
= cleanup_chain
;
181 /* Restore the cleanup chain from a previously saved chain. */
183 restore_cleanups (chain
)
184 struct cleanup
*chain
;
186 cleanup_chain
= chain
;
189 /* This function is useful for cleanups.
193 old_chain = make_cleanup (free_current_contents, &foo);
195 to arrange to free the object thus allocated. */
198 free_current_contents (location
)
204 /* Provide a known function that does nothing, to use as a base for
205 for a possibly long chain of cleanups. This is useful where we
206 use the cleanup chain for handling normal cleanups as well as dealing
207 with cleanups that need to be done as a result of a call to error().
208 In such cases, we may not be certain where the first cleanup is, unless
209 we have a do-nothing one to always use as the base. */
219 /* Provide a hook for modules wishing to print their own warning messages
220 to set up the terminal state in a compatible way, without them having
221 to import all the target_<...> macros. */
226 target_terminal_ours ();
227 wrap_here(""); /* Force out any buffered output */
228 gdb_flush (gdb_stdout
);
231 /* Print a warning message.
232 The first argument STRING is the warning message, used as a fprintf string,
233 and the remaining args are passed as arguments to it.
234 The primary difference between warnings and errors is that a warning
235 does not force the return to command level. */
246 target_terminal_ours ();
247 wrap_here(""); /* Force out any buffered output */
248 gdb_flush (gdb_stdout
);
249 if (warning_pre_print
)
250 fprintf_unfiltered (gdb_stderr
, warning_pre_print
);
251 string
= va_arg (args
, char *);
252 vfprintf_unfiltered (gdb_stderr
, string
, args
);
253 fprintf_unfiltered (gdb_stderr
, "\n");
257 /* Start the printing of an error message. Way to use this is to call
258 this, output the error message (use filtered output), and then call
259 return_to_top_level (RETURN_ERROR). error() provides a convenient way to
260 do this for the special case that the error message can be formatted with
261 a single printf call, but this is more general. */
265 target_terminal_ours ();
266 wrap_here (""); /* Force out any buffered output */
267 gdb_flush (gdb_stdout
);
269 annotate_error_begin ();
272 fprintf_filtered (gdb_stderr
, error_pre_print
);
275 /* Print an error message and return to command level.
276 The first argument STRING is the error message, used as a fprintf string,
277 and the remaining args are passed as arguments to it. */
289 string
= va_arg (args
, char *);
290 vfprintf_filtered (gdb_stderr
, string
, args
);
291 fprintf_filtered (gdb_stderr
, "\n");
293 return_to_top_level (RETURN_ERROR
);
296 /* Print an error message and exit reporting failure.
297 This is for a error that we cannot continue from.
298 The arguments are printed a la printf.
300 This function cannot be declared volatile (NORETURN) in an
301 ANSI environment because exit() is not declared volatile. */
312 string
= va_arg (args
, char *);
313 fprintf_unfiltered (gdb_stderr
, "\ngdb: ");
314 vfprintf_unfiltered (gdb_stderr
, string
, args
);
315 fprintf_unfiltered (gdb_stderr
, "\n");
320 /* Print an error message and exit, dumping core.
321 The arguments are printed a la printf (). */
325 fatal_dump_core (va_alist
)
332 string
= va_arg (args
, char *);
333 /* "internal error" is always correct, since GDB should never dump
334 core, no matter what the input. */
335 fprintf_unfiltered (gdb_stderr
, "\ngdb internal error: ");
336 vfprintf_unfiltered (gdb_stderr
, string
, args
);
337 fprintf_unfiltered (gdb_stderr
, "\n");
340 signal (SIGQUIT
, SIG_DFL
);
341 kill (getpid (), SIGQUIT
);
342 /* We should never get here, but just in case... */
346 /* The strerror() function can return NULL for errno values that are
347 out of range. Provide a "safe" version that always returns a
351 safe_strerror (errnum
)
357 if ((msg
= strerror (errnum
)) == NULL
)
359 sprintf (buf
, "(undocumented errno %d)", errnum
);
365 /* The strsignal() function can return NULL for signal values that are
366 out of range. Provide a "safe" version that always returns a
370 safe_strsignal (signo
)
376 if ((msg
= strsignal (signo
)) == NULL
)
378 sprintf (buf
, "(undocumented signal %d)", signo
);
385 /* Print the system error message for errno, and also mention STRING
386 as the file name for which the error was encountered.
387 Then return to command level. */
390 perror_with_name (string
)
396 err
= safe_strerror (errno
);
397 combined
= (char *) alloca (strlen (err
) + strlen (string
) + 3);
398 strcpy (combined
, string
);
399 strcat (combined
, ": ");
400 strcat (combined
, err
);
402 /* I understand setting these is a matter of taste. Still, some people
403 may clear errno but not know about bfd_error. Doing this here is not
405 bfd_set_error (bfd_error_no_error
);
408 error ("%s.", combined
);
411 /* Print the system error message for ERRCODE, and also mention STRING
412 as the file name for which the error was encountered. */
415 print_sys_errmsg (string
, errcode
)
422 err
= safe_strerror (errcode
);
423 combined
= (char *) alloca (strlen (err
) + strlen (string
) + 3);
424 strcpy (combined
, string
);
425 strcat (combined
, ": ");
426 strcat (combined
, err
);
428 /* We want anything which was printed on stdout to come out first, before
430 gdb_flush (gdb_stdout
);
431 fprintf_unfiltered (gdb_stderr
, "%s.\n", combined
);
434 /* Control C eventually causes this to be called, at a convenient time. */
439 serial_t gdb_stdout_serial
= serial_fdopen (1);
441 target_terminal_ours ();
443 /* We want all output to appear now, before we print "Quit". We
444 have 3 levels of buffering we have to flush (it's possible that
445 some of these should be changed to flush the lower-level ones
448 /* 1. The _filtered buffer. */
449 wrap_here ((char *)0);
451 /* 2. The stdio buffer. */
452 gdb_flush (gdb_stdout
);
453 gdb_flush (gdb_stderr
);
455 /* 3. The system-level buffer. */
456 SERIAL_FLUSH_OUTPUT (gdb_stdout_serial
);
457 SERIAL_UN_FDOPEN (gdb_stdout_serial
);
459 annotate_error_begin ();
461 /* Don't use *_filtered; we don't want to prompt the user to continue. */
463 fprintf_unfiltered (gdb_stderr
, error_pre_print
);
466 /* If there is no terminal switching for this target, then we can't
467 possibly get screwed by the lack of job control. */
468 || current_target
->to_terminal_ours
== NULL
)
469 fprintf_unfiltered (gdb_stderr
, "Quit\n");
471 fprintf_unfiltered (gdb_stderr
,
472 "Quit (expect signal SIGINT when the program is resumed)\n");
473 return_to_top_level (RETURN_QUIT
);
479 /* In the absence of signals, poll keyboard for a quit.
480 Called from #define QUIT pollquit() in xm-go32.h. */
498 /* We just ignore it */
499 fprintf_unfiltered (gdb_stderr
, "CTRL-A to quit, CTRL-B to quit harder\n");
521 fprintf_unfiltered (gdb_stderr
, "CTRL-A to quit, CTRL-B to quit harder\n");
528 /* Done by signals */
531 /* Control C comes here */
539 /* Restore the signal handler. Harmless with BSD-style signals, needed
540 for System V-style signals. So just always do it, rather than worrying
541 about USG defines and stuff like that. */
542 signal (signo
, request_quit
);
549 /* Memory management stuff (malloc friends). */
551 #if defined (NO_MMALLOC)
558 return (malloc (size
));
562 mrealloc (md
, ptr
, size
)
567 if (ptr
== 0) /* Guard against old realloc's */
568 return malloc (size
);
570 return realloc (ptr
, size
);
581 #endif /* NO_MMALLOC */
583 #if defined (NO_MMALLOC) || defined (NO_MMALLOC_CHECK)
591 #else /* have mmalloc and want corruption checking */
596 fatal_dump_core ("Memory corruption");
599 /* Attempt to install hooks in mmalloc/mrealloc/mfree for the heap specified
600 by MD, to detect memory corruption. Note that MD may be NULL to specify
601 the default heap that grows via sbrk.
603 Note that for freshly created regions, we must call mmcheck prior to any
604 mallocs in the region. Otherwise, any region which was allocated prior to
605 installing the checking hooks, which is later reallocated or freed, will
606 fail the checks! The mmcheck function only allows initial hooks to be
607 installed before the first mmalloc. However, anytime after we have called
608 mmcheck the first time to install the checking hooks, we can call it again
609 to update the function pointer to the memory corruption handler.
611 Returns zero on failure, non-zero on success. */
617 if (!mmcheck (md
, malloc_botch
))
619 warning ("internal error: failed to install memory consistency checks");
625 #endif /* Have mmalloc and want corruption checking */
627 /* Called when a memory allocation fails, with the number of bytes of
628 memory requested in SIZE. */
636 fatal ("virtual memory exhausted: can't allocate %ld bytes.", size
);
640 fatal ("virtual memory exhausted.");
644 /* Like mmalloc but get error if no storage available, and protect against
645 the caller wanting to allocate zero bytes. Whether to return NULL for
646 a zero byte request, or translate the request into a request for one
647 byte of zero'd storage, is a religious issue. */
660 else if ((val
= mmalloc (md
, size
)) == NULL
)
667 /* Like mrealloc but get error if no storage available. */
670 xmrealloc (md
, ptr
, size
)
679 val
= mrealloc (md
, ptr
, size
);
683 val
= mmalloc (md
, size
);
692 /* Like malloc but get error if no storage available, and protect against
693 the caller wanting to allocate zero bytes. */
699 return (xmmalloc ((PTR
) NULL
, size
));
702 /* Like mrealloc but get error if no storage available. */
709 return (xmrealloc ((PTR
) NULL
, ptr
, size
));
713 /* My replacement for the read system call.
714 Used like `read' but keeps going if `read' returns too soon. */
717 myread (desc
, addr
, len
)
727 val
= read (desc
, addr
, len
);
738 /* Make a copy of the string at PTR with SIZE characters
739 (and add a null character at the end in the copy).
740 Uses malloc to get the space. Returns the address of the copy. */
743 savestring (ptr
, size
)
747 register char *p
= (char *) xmalloc (size
+ 1);
748 memcpy (p
, ptr
, size
);
754 msavestring (md
, ptr
, size
)
759 register char *p
= (char *) xmmalloc (md
, size
+ 1);
760 memcpy (p
, ptr
, size
);
765 /* The "const" is so it compiles under DGUX (which prototypes strsave
766 in <string.h>. FIXME: This should be named "xstrsave", shouldn't it?
767 Doesn't real strsave return NULL if out of memory? */
772 return savestring (ptr
, strlen (ptr
));
780 return (msavestring (md
, ptr
, strlen (ptr
)));
784 print_spaces (n
, file
)
792 /* Print a host address. */
795 gdb_print_address (addr
, stream
)
800 /* We could use the %p conversion specifier to fprintf if we had any
801 way of knowing whether this host supports it. But the following
802 should work on the Alpha and on 32 bit machines. */
804 fprintf_filtered (stream
, "0x%lx", (unsigned long)addr
);
807 /* Ask user a y-or-n question and return 1 iff answer is yes.
808 Takes three args which are given to printf to print the question.
809 The first, a control string, should end in "? ".
810 It should not say how to answer, because we do that. */
823 /* Automatically answer "yes" if input is not from a terminal. */
824 if (!input_from_terminal_p ())
829 wrap_here (""); /* Flush any buffered output */
830 gdb_flush (gdb_stdout
);
832 if (annotation_level
> 1)
833 printf_filtered ("\n\032\032pre-query\n");
836 ctlstr
= va_arg (args
, char *);
837 vfprintf_filtered (gdb_stdout
, ctlstr
, args
);
839 printf_filtered ("(y or n) ");
841 if (annotation_level
> 1)
842 printf_filtered ("\n\032\032query\n");
844 gdb_flush (gdb_stdout
);
845 answer
= fgetc (stdin
);
846 clearerr (stdin
); /* in case of C-d */
847 if (answer
== EOF
) /* C-d */
852 if (answer
!= '\n') /* Eat rest of input line, to EOF or newline */
855 ans2
= fgetc (stdin
);
858 while (ans2
!= EOF
&& ans2
!= '\n');
871 printf_filtered ("Please answer y or n.\n");
874 if (annotation_level
> 1)
875 printf_filtered ("\n\032\032post-query\n");
880 /* Parse a C escape sequence. STRING_PTR points to a variable
881 containing a pointer to the string to parse. That pointer
882 should point to the character after the \. That pointer
883 is updated past the characters we use. The value of the
884 escape sequence is returned.
886 A negative value means the sequence \ newline was seen,
887 which is supposed to be equivalent to nothing at all.
889 If \ is followed by a null character, we return a negative
890 value and leave the string pointer pointing at the null character.
892 If \ is followed by 000, we return 0 and leave the string pointer
893 after the zeros. A value of 0 does not mean end of string. */
896 parse_escape (string_ptr
)
899 register int c
= *(*string_ptr
)++;
903 return 007; /* Bell (alert) char */
906 case 'e': /* Escape character */
924 c
= *(*string_ptr
)++;
926 c
= parse_escape (string_ptr
);
929 return (c
& 0200) | (c
& 037);
940 register int i
= c
- '0';
941 register int count
= 0;
944 if ((c
= *(*string_ptr
)++) >= '0' && c
<= '7')
962 /* Print the character C on STREAM as part of the contents of a literal
963 string whose delimiter is QUOTER. Note that this routine should only
964 be call for printing things which are independent of the language
965 of the program being debugged. */
968 gdb_printchar (c
, stream
, quoter
)
974 c
&= 0xFF; /* Avoid sign bit follies */
976 if ( c
< 0x20 || /* Low control chars */
977 (c
>= 0x7F && c
< 0xA0) || /* DEL, High controls */
978 (sevenbit_strings
&& c
>= 0x80)) { /* high order bit set */
982 fputs_filtered ("\\n", stream
);
985 fputs_filtered ("\\b", stream
);
988 fputs_filtered ("\\t", stream
);
991 fputs_filtered ("\\f", stream
);
994 fputs_filtered ("\\r", stream
);
997 fputs_filtered ("\\e", stream
);
1000 fputs_filtered ("\\a", stream
);
1003 fprintf_filtered (stream
, "\\%.3o", (unsigned int) c
);
1007 if (c
== '\\' || c
== quoter
)
1008 fputs_filtered ("\\", stream
);
1009 fprintf_filtered (stream
, "%c", c
);
1013 /* Number of lines per page or UINT_MAX if paging is disabled. */
1014 static unsigned int lines_per_page
;
1015 /* Number of chars per line or UNIT_MAX is line folding is disabled. */
1016 static unsigned int chars_per_line
;
1017 /* Current count of lines printed on this page, chars on this line. */
1018 static unsigned int lines_printed
, chars_printed
;
1020 /* Buffer and start column of buffered text, for doing smarter word-
1021 wrapping. When someone calls wrap_here(), we start buffering output
1022 that comes through fputs_filtered(). If we see a newline, we just
1023 spit it out and forget about the wrap_here(). If we see another
1024 wrap_here(), we spit it out and remember the newer one. If we see
1025 the end of the line, we spit out a newline, the indent, and then
1026 the buffered output. */
1028 /* Malloc'd buffer with chars_per_line+2 bytes. Contains characters which
1029 are waiting to be output (they have already been counted in chars_printed).
1030 When wrap_buffer[0] is null, the buffer is empty. */
1031 static char *wrap_buffer
;
1033 /* Pointer in wrap_buffer to the next character to fill. */
1034 static char *wrap_pointer
;
1036 /* String to indent by if the wrap occurs. Must not be NULL if wrap_column
1038 static char *wrap_indent
;
1040 /* Column number on the screen where wrap_buffer begins, or 0 if wrapping
1041 is not in effect. */
1042 static int wrap_column
;
1046 set_width_command (args
, from_tty
, c
)
1049 struct cmd_list_element
*c
;
1053 wrap_buffer
= (char *) xmalloc (chars_per_line
+ 2);
1054 wrap_buffer
[0] = '\0';
1057 wrap_buffer
= (char *) xrealloc (wrap_buffer
, chars_per_line
+ 2);
1058 wrap_pointer
= wrap_buffer
; /* Start it at the beginning */
1061 /* Wait, so the user can read what's on the screen. Prompt the user
1062 to continue by pressing RETURN. */
1065 prompt_for_continue ()
1068 char cont_prompt
[120];
1070 if (annotation_level
> 1)
1071 printf_unfiltered ("\n\032\032pre-prompt-for-continue\n");
1073 strcpy (cont_prompt
,
1074 "---Type <return> to continue, or q <return> to quit---");
1075 if (annotation_level
> 1)
1076 strcat (cont_prompt
, "\n\032\032prompt-for-continue\n");
1078 /* We must do this *before* we call gdb_readline, else it will eventually
1079 call us -- thinking that we're trying to print beyond the end of the
1081 reinitialize_more_filter ();
1084 /* On a real operating system, the user can quit with SIGINT.
1087 'q' is provided on all systems so users don't have to change habits
1088 from system to system, and because telling them what to do in
1089 the prompt is more user-friendly than expecting them to think of
1091 /* Call readline, not gdb_readline, because GO32 readline handles control-C
1092 whereas control-C to gdb_readline will cause the user to get dumped
1094 ignore
= readline (cont_prompt
);
1096 if (annotation_level
> 1)
1097 printf_unfiltered ("\n\032\032post-prompt-for-continue\n");
1102 while (*p
== ' ' || *p
== '\t')
1105 request_quit (SIGINT
);
1110 /* Now we have to do this again, so that GDB will know that it doesn't
1111 need to save the ---Type <return>--- line at the top of the screen. */
1112 reinitialize_more_filter ();
1114 dont_repeat (); /* Forget prev cmd -- CR won't repeat it. */
1117 /* Reinitialize filter; ie. tell it to reset to original values. */
1120 reinitialize_more_filter ()
1126 /* Indicate that if the next sequence of characters overflows the line,
1127 a newline should be inserted here rather than when it hits the end.
1128 If INDENT is non-null, it is a string to be printed to indent the
1129 wrapped part on the next line. INDENT must remain accessible until
1130 the next call to wrap_here() or until a newline is printed through
1133 If the line is already overfull, we immediately print a newline and
1134 the indentation, and disable further wrapping.
1136 If we don't know the width of lines, but we know the page height,
1137 we must not wrap words, but should still keep track of newlines
1138 that were explicitly printed.
1140 INDENT should not contain tabs, as that will mess up the char count
1141 on the next line. FIXME.
1143 This routine is guaranteed to force out any output which has been
1144 squirreled away in the wrap_buffer, so wrap_here ((char *)0) can be
1145 used to force out output from the wrap_buffer. */
1153 *wrap_pointer
= '\0';
1154 fputs_unfiltered (wrap_buffer
, gdb_stdout
);
1156 wrap_pointer
= wrap_buffer
;
1157 wrap_buffer
[0] = '\0';
1158 if (chars_per_line
== UINT_MAX
) /* No line overflow checking */
1162 else if (chars_printed
>= chars_per_line
)
1164 puts_filtered ("\n");
1166 puts_filtered (indent
);
1171 wrap_column
= chars_printed
;
1175 wrap_indent
= indent
;
1179 /* Ensure that whatever gets printed next, using the filtered output
1180 commands, starts at the beginning of the line. I.E. if there is
1181 any pending output for the current line, flush it and start a new
1182 line. Otherwise do nothing. */
1187 if (chars_printed
> 0)
1189 puts_filtered ("\n");
1195 gdb_fopen (name
, mode
)
1199 return fopen (name
, mode
);
1209 /* Like fputs but if FILTER is true, pause after every screenful.
1211 Regardless of FILTER can wrap at points other than the final
1212 character of a line.
1214 Unlike fputs, fputs_maybe_filtered does not return a value.
1215 It is OK for LINEBUFFER to be NULL, in which case just don't print
1218 Note that a longjmp to top level may occur in this routine (only if
1219 FILTER is true) (since prompt_for_continue may do so) so this
1220 routine should not be called when cleanups are not in place. */
1223 fputs_maybe_filtered (linebuffer
, stream
, filter
)
1224 const char *linebuffer
;
1228 const char *lineptr
;
1230 if (linebuffer
== 0)
1233 /* Don't do any filtering if it is disabled. */
1234 if (stream
!= gdb_stdout
1235 || (lines_per_page
== UINT_MAX
&& chars_per_line
== UINT_MAX
))
1237 fputs_unfiltered (linebuffer
, stream
);
1241 /* Go through and output each character. Show line extension
1242 when this is necessary; prompt user for new page when this is
1245 lineptr
= linebuffer
;
1248 /* Possible new page. */
1250 (lines_printed
>= lines_per_page
- 1))
1251 prompt_for_continue ();
1253 while (*lineptr
&& *lineptr
!= '\n')
1255 /* Print a single line. */
1256 if (*lineptr
== '\t')
1259 *wrap_pointer
++ = '\t';
1261 fputc_unfiltered ('\t', stream
);
1262 /* Shifting right by 3 produces the number of tab stops
1263 we have already passed, and then adding one and
1264 shifting left 3 advances to the next tab stop. */
1265 chars_printed
= ((chars_printed
>> 3) + 1) << 3;
1271 *wrap_pointer
++ = *lineptr
;
1273 fputc_unfiltered (*lineptr
, stream
);
1278 if (chars_printed
>= chars_per_line
)
1280 unsigned int save_chars
= chars_printed
;
1284 /* If we aren't actually wrapping, don't output newline --
1285 if chars_per_line is right, we probably just overflowed
1286 anyway; if it's wrong, let us keep going. */
1288 fputc_unfiltered ('\n', stream
);
1290 /* Possible new page. */
1291 if (lines_printed
>= lines_per_page
- 1)
1292 prompt_for_continue ();
1294 /* Now output indentation and wrapped string */
1297 fputs_unfiltered (wrap_indent
, stream
);
1298 *wrap_pointer
= '\0'; /* Null-terminate saved stuff */
1299 fputs_unfiltered (wrap_buffer
, stream
); /* and eject it */
1300 /* FIXME, this strlen is what prevents wrap_indent from
1301 containing tabs. However, if we recurse to print it
1302 and count its chars, we risk trouble if wrap_indent is
1303 longer than (the user settable) chars_per_line.
1304 Note also that this can set chars_printed > chars_per_line
1305 if we are printing a long string. */
1306 chars_printed
= strlen (wrap_indent
)
1307 + (save_chars
- wrap_column
);
1308 wrap_pointer
= wrap_buffer
; /* Reset buffer */
1309 wrap_buffer
[0] = '\0';
1310 wrap_column
= 0; /* And disable fancy wrap */
1315 if (*lineptr
== '\n')
1318 wrap_here ((char *)0); /* Spit out chars, cancel further wraps */
1320 fputc_unfiltered ('\n', stream
);
1327 fputs_filtered (linebuffer
, stream
)
1328 const char *linebuffer
;
1331 fputs_maybe_filtered (linebuffer
, stream
, 1);
1334 #ifndef FPUTS_UNFILTERED_OVERRIDE
1336 fputs_unfiltered (linebuffer
, stream
)
1337 const char *linebuffer
;
1340 fputs (linebuffer
, stream
);
1342 #endif /* FPUTS_UNFILTERED_OVERRIDE */
1351 fputs_unfiltered (buf
, gdb_stdout
);
1355 fputc_unfiltered (c
, stream
)
1362 fputs_unfiltered (buf
, stream
);
1366 /* Print a variable number of ARGS using format FORMAT. If this
1367 information is going to put the amount written (since the last call
1368 to REINITIALIZE_MORE_FILTER or the last page break) over the page size,
1369 call prompt_for_continue to get the users permision to continue.
1371 Unlike fprintf, this function does not return a value.
1373 We implement three variants, vfprintf (takes a vararg list and stream),
1374 fprintf (takes a stream to write on), and printf (the usual).
1376 Note also that a longjmp to top level may occur in this routine
1377 (since prompt_for_continue may do so) so this routine should not be
1378 called when cleanups are not in place. */
1381 vfprintf_maybe_filtered (stream
, format
, args
, filter
)
1388 struct cleanup
*old_cleanups
;
1390 vasprintf (&linebuffer
, format
, args
);
1391 if (linebuffer
== NULL
)
1393 fputs_unfiltered ("\ngdb: virtual memory exhausted.\n", gdb_stderr
);
1396 old_cleanups
= make_cleanup (free
, linebuffer
);
1397 fputs_maybe_filtered (linebuffer
, stream
, filter
);
1398 do_cleanups (old_cleanups
);
1403 vfprintf_filtered (stream
, format
, args
)
1408 vfprintf_maybe_filtered (stream
, format
, args
, 1);
1412 vfprintf_unfiltered (stream
, format
, args
)
1418 struct cleanup
*old_cleanups
;
1420 vasprintf (&linebuffer
, format
, args
);
1421 if (linebuffer
== NULL
)
1423 fputs_unfiltered ("\ngdb: virtual memory exhausted.\n", gdb_stderr
);
1426 old_cleanups
= make_cleanup (free
, linebuffer
);
1427 fputs_unfiltered (linebuffer
, stream
);
1428 do_cleanups (old_cleanups
);
1432 vprintf_filtered (format
, args
)
1436 vfprintf_maybe_filtered (gdb_stdout
, format
, args
, 1);
1440 vprintf_unfiltered (format
, args
)
1444 vfprintf_unfiltered (gdb_stdout
, format
, args
);
1449 fprintf_filtered (va_alist
)
1457 stream
= va_arg (args
, FILE *);
1458 format
= va_arg (args
, char *);
1460 vfprintf_filtered (stream
, format
, args
);
1466 fprintf_unfiltered (va_alist
)
1474 stream
= va_arg (args
, FILE *);
1475 format
= va_arg (args
, char *);
1477 vfprintf_unfiltered (stream
, format
, args
);
1481 /* Like fprintf_filtered, but prints its result indented.
1482 Called as fprintfi_filtered (spaces, stream, format, ...); */
1486 fprintfi_filtered (va_alist
)
1495 spaces
= va_arg (args
, int);
1496 stream
= va_arg (args
, FILE *);
1497 format
= va_arg (args
, char *);
1498 print_spaces_filtered (spaces
, stream
);
1500 vfprintf_filtered (stream
, format
, args
);
1507 printf_filtered (va_alist
)
1514 format
= va_arg (args
, char *);
1516 vfprintf_filtered (gdb_stdout
, format
, args
);
1523 printf_unfiltered (va_alist
)
1530 format
= va_arg (args
, char *);
1532 vfprintf_unfiltered (gdb_stdout
, format
, args
);
1536 /* Like printf_filtered, but prints it's result indented.
1537 Called as printfi_filtered (spaces, format, ...); */
1541 printfi_filtered (va_alist
)
1549 spaces
= va_arg (args
, int);
1550 format
= va_arg (args
, char *);
1551 print_spaces_filtered (spaces
, gdb_stdout
);
1552 vfprintf_filtered (gdb_stdout
, format
, args
);
1556 /* Easy -- but watch out!
1558 This routine is *not* a replacement for puts()! puts() appends a newline.
1559 This one doesn't, and had better not! */
1562 puts_filtered (string
)
1565 fputs_filtered (string
, gdb_stdout
);
1569 puts_unfiltered (string
)
1572 fputs_unfiltered (string
, gdb_stdout
);
1575 /* Return a pointer to N spaces and a null. The pointer is good
1576 until the next call to here. */
1582 static char *spaces
;
1583 static int max_spaces
;
1589 spaces
= (char *) xmalloc (n
+1);
1590 for (t
= spaces
+n
; t
!= spaces
;)
1596 return spaces
+ max_spaces
- n
;
1599 /* Print N spaces. */
1601 print_spaces_filtered (n
, stream
)
1605 fputs_filtered (n_spaces (n
), stream
);
1608 /* C++ demangler stuff. */
1610 /* fprintf_symbol_filtered attempts to demangle NAME, a symbol in language
1611 LANG, using demangling args ARG_MODE, and print it filtered to STREAM.
1612 If the name is not mangled, or the language for the name is unknown, or
1613 demangling is off, the name is printed in its "raw" form. */
1616 fprintf_symbol_filtered (stream
, name
, lang
, arg_mode
)
1626 /* If user wants to see raw output, no problem. */
1629 fputs_filtered (name
, stream
);
1635 case language_cplus
:
1636 demangled
= cplus_demangle (name
, arg_mode
);
1638 case language_chill
:
1639 demangled
= chill_demangle (name
);
1645 fputs_filtered (demangled
? demangled
: name
, stream
);
1646 if (demangled
!= NULL
)
1654 /* Do a strcmp() type operation on STRING1 and STRING2, ignoring any
1655 differences in whitespace. Returns 0 if they match, non-zero if they
1656 don't (slightly different than strcmp()'s range of return values).
1658 As an extra hack, string1=="FOO(ARGS)" matches string2=="FOO".
1659 This "feature" is useful when searching for matching C++ function names
1660 (such as if the user types 'break FOO', where FOO is a mangled C++
1664 strcmp_iw (string1
, string2
)
1665 const char *string1
;
1666 const char *string2
;
1668 while ((*string1
!= '\0') && (*string2
!= '\0'))
1670 while (isspace (*string1
))
1674 while (isspace (*string2
))
1678 if (*string1
!= *string2
)
1682 if (*string1
!= '\0')
1688 return (*string1
!= '\0' && *string1
!= '(') || (*string2
!= '\0');
1693 _initialize_utils ()
1695 struct cmd_list_element
*c
;
1697 c
= add_set_cmd ("width", class_support
, var_uinteger
,
1698 (char *)&chars_per_line
,
1699 "Set number of characters gdb thinks are in a line.",
1701 add_show_from_set (c
, &showlist
);
1702 c
->function
.sfunc
= set_width_command
;
1705 (add_set_cmd ("height", class_support
,
1706 var_uinteger
, (char *)&lines_per_page
,
1707 "Set number of lines gdb thinks are in a page.", &setlist
),
1710 /* These defaults will be used if we are unable to get the correct
1711 values from termcap. */
1712 #if defined(__GO32__)
1713 lines_per_page
= ScreenRows();
1714 chars_per_line
= ScreenCols();
1716 lines_per_page
= 24;
1717 chars_per_line
= 80;
1718 /* start-sanitize-mpw */
1720 /* No termcap under MPW, although might be cool to do something
1721 by looking at worksheet or console window sizes. */
1722 /* end-sanitize-mpw */
1723 /* Initialize the screen height and width from termcap. */
1725 char *termtype
= getenv ("TERM");
1727 /* Positive means success, nonpositive means failure. */
1730 /* 2048 is large enough for all known terminals, according to the
1731 GNU termcap manual. */
1732 char term_buffer
[2048];
1736 status
= tgetent (term_buffer
, termtype
);
1741 val
= tgetnum ("li");
1743 lines_per_page
= val
;
1745 /* The number of lines per page is not mentioned
1746 in the terminal description. This probably means
1747 that paging is not useful (e.g. emacs shell window),
1748 so disable paging. */
1749 lines_per_page
= UINT_MAX
;
1751 val
= tgetnum ("co");
1753 chars_per_line
= val
;
1757 /* start-sanitize-mpw */
1759 /* end-sanitize-mpw */
1761 #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
1763 /* If there is a better way to determine the window size, use it. */
1764 SIGWINCH_HANDLER ();
1767 /* If the output is not a terminal, don't paginate it. */
1768 if (!ISATTY (gdb_stdout
))
1769 lines_per_page
= UINT_MAX
;
1771 set_width_command ((char *)NULL
, 0, c
);
1774 (add_set_cmd ("demangle", class_support
, var_boolean
,
1776 "Set demangling of encoded C++ names when displaying symbols.",
1781 (add_set_cmd ("sevenbit-strings", class_support
, var_boolean
,
1782 (char *)&sevenbit_strings
,
1783 "Set printing of 8-bit characters in strings as \\nnn.",
1788 (add_set_cmd ("asm-demangle", class_support
, var_boolean
,
1789 (char *)&asm_demangle
,
1790 "Set demangling of C++ names in disassembly listings.",
1795 /* Machine specific function to handle SIGWINCH signal. */
1797 #ifdef SIGWINCH_HANDLER_BODY
1798 SIGWINCH_HANDLER_BODY