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- /* General utility routines for GDB, the GNU debugger.
- Copyright 1986, 1989, 1990, 1991, 1992, 1995 Free Software Foundation, Inc.
-
- This file is part of GDB.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #include "defs.h"
- #if !defined(__GO32__) && !defined(WIN32)
- #include <sys/ioctl.h>
- #include <sys/param.h>
- #include <pwd.h>
- #endif
- #include <varargs.h>
- #include <ctype.h>
- #include <string.h>
-
- #include "signals.h"
- #include "gdbcmd.h"
- #include "serial.h"
- #include "bfd.h"
- #include "target.h"
- #include "demangle.h"
- #include "expression.h"
- #include "language.h"
- #include "annotate.h"
-
- #include "readline.h"
-
- /* readline defines this. */
- #undef savestring
-
- /* Prototypes for local functions */
-
- #if defined (NO_MMALLOC) || defined (NO_MMALLOC_CHECK)
- #else
-
- static void
- malloc_botch PARAMS ((void));
-
- #endif /* NO_MMALLOC, etc */
-
- static void
- fatal_dump_core (); /* Can't prototype with <varargs.h> usage... */
-
- static void
- prompt_for_continue PARAMS ((void));
-
- static void
- set_width_command PARAMS ((char *, int, struct cmd_list_element *));
-
- /* If this definition isn't overridden by the header files, assume
- that isatty and fileno exist on this system. */
- #ifndef ISATTY
- #define ISATTY(FP) (isatty (fileno (FP)))
- #endif
-
- /* Chain of cleanup actions established with make_cleanup,
- to be executed if an error happens. */
-
- static struct cleanup *cleanup_chain;
-
- /* Nonzero if we have job control. */
-
- int job_control;
-
- /* Nonzero means a quit has been requested. */
-
- int quit_flag;
-
- /* Nonzero means quit immediately if Control-C is typed now, rather
- than waiting until QUIT is executed. Be careful in setting this;
- code which executes with immediate_quit set has to be very careful
- about being able to deal with being interrupted at any time. It is
- almost always better to use QUIT; the only exception I can think of
- is being able to quit out of a system call (using EINTR loses if
- the SIGINT happens between the previous QUIT and the system call).
- To immediately quit in the case in which a SIGINT happens between
- the previous QUIT and setting immediate_quit (desirable anytime we
- expect to block), call QUIT after setting immediate_quit. */
-
- int immediate_quit;
-
- /* Nonzero means that encoded C++ names should be printed out in their
- C++ form rather than raw. */
-
- int demangle = 1;
-
- /* Nonzero means that encoded C++ names should be printed out in their
- C++ form even in assembler language displays. If this is set, but
- DEMANGLE is zero, names are printed raw, i.e. DEMANGLE controls. */
-
- int asm_demangle = 0;
-
- /* Nonzero means that strings with character values >0x7F should be printed
- as octal escapes. Zero means just print the value (e.g. it's an
- international character, and the terminal or window can cope.) */
-
- int sevenbit_strings = 0;
-
- /* String to be printed before error messages, if any. */
-
- char *error_pre_print;
- char *warning_pre_print = "\nwarning: ";
-
- /* Add a new cleanup to the cleanup_chain,
- and return the previous chain pointer
- to be passed later to do_cleanups or discard_cleanups.
- Args are FUNCTION to clean up with, and ARG to pass to it. */
-
- struct cleanup *
- make_cleanup (function, arg)
- void (*function) PARAMS ((PTR));
- PTR arg;
- {
- register struct cleanup *new
- = (struct cleanup *) xmalloc (sizeof (struct cleanup));
- register struct cleanup *old_chain = cleanup_chain;
-
- new->next = cleanup_chain;
- new->function = function;
- new->arg = arg;
- cleanup_chain = new;
-
- return old_chain;
- }
-
- /* Discard cleanups and do the actions they describe
- until we get back to the point OLD_CHAIN in the cleanup_chain. */
-
- void
- do_cleanups (old_chain)
- register struct cleanup *old_chain;
- {
- register struct cleanup *ptr;
- while ((ptr = cleanup_chain) != old_chain)
- {
- cleanup_chain = ptr->next; /* Do this first incase recursion */
- (*ptr->function) (ptr->arg);
- free (ptr);
- }
- }
-
- /* Discard cleanups, not doing the actions they describe,
- until we get back to the point OLD_CHAIN in the cleanup_chain. */
-
- void
- discard_cleanups (old_chain)
- register struct cleanup *old_chain;
- {
- register struct cleanup *ptr;
- while ((ptr = cleanup_chain) != old_chain)
- {
- cleanup_chain = ptr->next;
- free ((PTR)ptr);
- }
- }
-
- /* Set the cleanup_chain to 0, and return the old cleanup chain. */
- struct cleanup *
- save_cleanups ()
- {
- struct cleanup *old_chain = cleanup_chain;
-
- cleanup_chain = 0;
- return old_chain;
- }
-
- /* Restore the cleanup chain from a previously saved chain. */
- void
- restore_cleanups (chain)
- struct cleanup *chain;
- {
- cleanup_chain = chain;
- }
-
- /* This function is useful for cleanups.
- Do
-
- foo = xmalloc (...);
- old_chain = make_cleanup (free_current_contents, &foo);
-
- to arrange to free the object thus allocated. */
-
- void
- free_current_contents (location)
- char **location;
- {
- free (*location);
- }
-
- /* Provide a known function that does nothing, to use as a base for
- for a possibly long chain of cleanups. This is useful where we
- use the cleanup chain for handling normal cleanups as well as dealing
- with cleanups that need to be done as a result of a call to error().
- In such cases, we may not be certain where the first cleanup is, unless
- we have a do-nothing one to always use as the base. */
-
- /* ARGSUSED */
- void
- null_cleanup (arg)
- char **arg;
- {
- }
-
-
- /* Provide a hook for modules wishing to print their own warning messages
- to set up the terminal state in a compatible way, without them having
- to import all the target_<...> macros. */
-
- void
- warning_setup ()
- {
- target_terminal_ours ();
- wrap_here(""); /* Force out any buffered output */
- gdb_flush (gdb_stdout);
- }
-
- /* Print a warning message.
- The first argument STRING is the warning message, used as a fprintf string,
- and the remaining args are passed as arguments to it.
- The primary difference between warnings and errors is that a warning
- does not force the return to command level. */
-
- /* VARARGS */
- void
- warning (va_alist)
- va_dcl
- {
- va_list args;
- char *string;
-
- va_start (args);
- target_terminal_ours ();
- wrap_here(""); /* Force out any buffered output */
- gdb_flush (gdb_stdout);
- if (warning_pre_print)
- fprintf_unfiltered (gdb_stderr, warning_pre_print);
- string = va_arg (args, char *);
- vfprintf_unfiltered (gdb_stderr, string, args);
- fprintf_unfiltered (gdb_stderr, "\n");
- va_end (args);
- }
-
- /* Start the printing of an error message. Way to use this is to call
- this, output the error message (use filtered output), and then call
- return_to_top_level (RETURN_ERROR). error() provides a convenient way to
- do this for the special case that the error message can be formatted with
- a single printf call, but this is more general. */
- void
- error_begin ()
- {
- target_terminal_ours ();
- wrap_here (""); /* Force out any buffered output */
- gdb_flush (gdb_stdout);
-
- annotate_error_begin ();
-
- if (error_pre_print)
- fprintf_filtered (gdb_stderr, error_pre_print);
- }
-
- /* Print an error message and return to command level.
- The first argument STRING is the error message, used as a fprintf string,
- and the remaining args are passed as arguments to it. */
-
- /* VARARGS */
- NORETURN void
- error (va_alist)
- va_dcl
- {
- va_list args;
- char *string;
-
- va_start (args);
-
- if (error_hook)
- error_hook (args); /* Never returns */
-
- error_begin ();
- string = va_arg (args, char *);
- vfprintf_filtered (gdb_stderr, string, args);
- fprintf_filtered (gdb_stderr, "\n");
- va_end (args);
- return_to_top_level (RETURN_ERROR);
- }
-
- /* Print an error message and exit reporting failure.
- This is for a error that we cannot continue from.
- The arguments are printed a la printf.
-
- This function cannot be declared volatile (NORETURN) in an
- ANSI environment because exit() is not declared volatile. */
-
- /* VARARGS */
- NORETURN void
- fatal (va_alist)
- va_dcl
- {
- va_list args;
- char *string;
-
- va_start (args);
- string = va_arg (args, char *);
- fprintf_unfiltered (gdb_stderr, "\ngdb: ");
- vfprintf_unfiltered (gdb_stderr, string, args);
- fprintf_unfiltered (gdb_stderr, "\n");
- va_end (args);
- exit (1);
- }
-
- /* Print an error message and exit, dumping core.
- The arguments are printed a la printf (). */
-
- /* VARARGS */
- static void
- fatal_dump_core (va_alist)
- va_dcl
- {
- va_list args;
- char *string;
-
- va_start (args);
- string = va_arg (args, char *);
- /* "internal error" is always correct, since GDB should never dump
- core, no matter what the input. */
- fprintf_unfiltered (gdb_stderr, "\ngdb internal error: ");
- vfprintf_unfiltered (gdb_stderr, string, args);
- fprintf_unfiltered (gdb_stderr, "\n");
- va_end (args);
-
- signal (SIGQUIT, SIG_DFL);
- kill (getpid (), SIGQUIT);
- /* We should never get here, but just in case... */
- exit (1);
- }
-
- /* The strerror() function can return NULL for errno values that are
- out of range. Provide a "safe" version that always returns a
- printable string. */
-
- char *
- safe_strerror (errnum)
- int errnum;
- {
- char *msg;
- static char buf[32];
-
- if ((msg = strerror (errnum)) == NULL)
- {
- sprintf (buf, "(undocumented errno %d)", errnum);
- msg = buf;
- }
- return (msg);
- }
-
- /* The strsignal() function can return NULL for signal values that are
- out of range. Provide a "safe" version that always returns a
- printable string. */
-
- char *
- safe_strsignal (signo)
- int signo;
- {
- char *msg;
- static char buf[32];
-
- if ((msg = strsignal (signo)) == NULL)
- {
- sprintf (buf, "(undocumented signal %d)", signo);
- msg = buf;
- }
- return (msg);
- }
-
-
- /* Print the system error message for errno, and also mention STRING
- as the file name for which the error was encountered.
- Then return to command level. */
-
- void
- perror_with_name (string)
- char *string;
- {
- char *err;
- char *combined;
-
- err = safe_strerror (errno);
- combined = (char *) alloca (strlen (err) + strlen (string) + 3);
- strcpy (combined, string);
- strcat (combined, ": ");
- strcat (combined, err);
-
- /* I understand setting these is a matter of taste. Still, some people
- may clear errno but not know about bfd_error. Doing this here is not
- unreasonable. */
- bfd_set_error (bfd_error_no_error);
- errno = 0;
-
- error ("%s.", combined);
- }
-
- /* Print the system error message for ERRCODE, and also mention STRING
- as the file name for which the error was encountered. */
-
- void
- print_sys_errmsg (string, errcode)
- char *string;
- int errcode;
- {
- char *err;
- char *combined;
-
- err = safe_strerror (errcode);
- combined = (char *) alloca (strlen (err) + strlen (string) + 3);
- strcpy (combined, string);
- strcat (combined, ": ");
- strcat (combined, err);
-
- /* We want anything which was printed on stdout to come out first, before
- this message. */
- gdb_flush (gdb_stdout);
- fprintf_unfiltered (gdb_stderr, "%s.\n", combined);
- }
-
- /* Control C eventually causes this to be called, at a convenient time. */
-
- void
- quit ()
- {
- serial_t gdb_stdout_serial = serial_fdopen (1);
-
- target_terminal_ours ();
-
- /* We want all output to appear now, before we print "Quit". We
- have 3 levels of buffering we have to flush (it's possible that
- some of these should be changed to flush the lower-level ones
- too): */
-
- /* 1. The _filtered buffer. */
- wrap_here ((char *)0);
-
- /* 2. The stdio buffer. */
- gdb_flush (gdb_stdout);
- gdb_flush (gdb_stderr);
-
- /* 3. The system-level buffer. */
- SERIAL_FLUSH_OUTPUT (gdb_stdout_serial);
- SERIAL_UN_FDOPEN (gdb_stdout_serial);
-
- annotate_error_begin ();
-
- /* Don't use *_filtered; we don't want to prompt the user to continue. */
- if (error_pre_print)
- fprintf_unfiltered (gdb_stderr, error_pre_print);
-
- if (job_control
- /* If there is no terminal switching for this target, then we can't
- possibly get screwed by the lack of job control. */
- || current_target.to_terminal_ours == NULL)
- fprintf_unfiltered (gdb_stderr, "Quit\n");
- else
- fprintf_unfiltered (gdb_stderr,
- "Quit (expect signal SIGINT when the program is resumed)\n");
- return_to_top_level (RETURN_QUIT);
- }
-
-
- #if defined(__GO32__)||defined(WIN32)
-
- /* In the absence of signals, poll keyboard for a quit.
- Called from #define QUIT pollquit() in xm-go32.h. */
-
- void
- pollquit()
- {
- if (kbhit ())
- {
- int k = getkey ();
- if (k == 1) {
- quit_flag = 1;
- quit();
- }
- else if (k == 2) {
- immediate_quit = 1;
- quit ();
- }
- else
- {
- /* We just ignore it */
- fprintf_unfiltered (gdb_stderr, "CTRL-A to quit, CTRL-B to quit harder\n");
- }
- }
- }
-
-
- #endif
- #if defined(__GO32__)||defined(WIN32)
- void notice_quit()
- {
- if (kbhit ())
- {
- int k = getkey ();
- if (k == 1) {
- quit_flag = 1;
- }
- else if (k == 2)
- {
- immediate_quit = 1;
- }
- else
- {
- fprintf_unfiltered (gdb_stderr, "CTRL-A to quit, CTRL-B to quit harder\n");
- }
- }
- }
- #else
- void notice_quit()
- {
- /* Done by signals */
- }
- #endif
- /* Control C comes here */
-
- void
- request_quit (signo)
- int signo;
- {
- quit_flag = 1;
-
- /* Restore the signal handler. Harmless with BSD-style signals, needed
- for System V-style signals. So just always do it, rather than worrying
- about USG defines and stuff like that. */
- signal (signo, request_quit);
-
- #ifdef REQUEST_QUIT
- REQUEST_QUIT;
- #else
- if (immediate_quit)
- quit ();
- #endif
- }
-
-
- /* Memory management stuff (malloc friends). */
-
- #if defined (NO_MMALLOC)
-
- /* Make a substitute size_t for non-ANSI compilers. */
-
- #if !defined(__STDC__) && !defined(_AIX)
- #ifndef size_t
- #define size_t unsigned int
- #endif
- #endif
-
- PTR
- mmalloc (md, size)
- PTR md;
- size_t size;
- {
- return malloc (size);
- }
-
- PTR
- mrealloc (md, ptr, size)
- PTR md;
- PTR ptr;
- size_t size;
- {
- if (ptr == 0) /* Guard against old realloc's */
- return malloc (size);
- else
- return realloc (ptr, size);
- }
-
- void
- mfree (md, ptr)
- PTR md;
- PTR ptr;
- {
- free (ptr);
- }
-
- #endif /* NO_MMALLOC */
-
- #if defined (NO_MMALLOC) || defined (NO_MMALLOC_CHECK)
-
- void
- init_malloc (md)
- PTR md;
- {
- }
-
- #else /* have mmalloc and want corruption checking */
-
- static void
- malloc_botch ()
- {
- fatal_dump_core ("Memory corruption");
- }
-
- /* Attempt to install hooks in mmalloc/mrealloc/mfree for the heap specified
- by MD, to detect memory corruption. Note that MD may be NULL to specify
- the default heap that grows via sbrk.
-
- Note that for freshly created regions, we must call mmcheck prior to any
- mallocs in the region. Otherwise, any region which was allocated prior to
- installing the checking hooks, which is later reallocated or freed, will
- fail the checks! The mmcheck function only allows initial hooks to be
- installed before the first mmalloc. However, anytime after we have called
- mmcheck the first time to install the checking hooks, we can call it again
- to update the function pointer to the memory corruption handler.
-
- Returns zero on failure, non-zero on success. */
-
- void
- init_malloc (md)
- PTR md;
- {
- if (!mmcheck (md, malloc_botch))
- {
- warning ("internal error: failed to install memory consistency checks");
- }
-
- mmtrace ();
- }
-
- #endif /* Have mmalloc and want corruption checking */
-
- /* Called when a memory allocation fails, with the number of bytes of
- memory requested in SIZE. */
-
- NORETURN void
- nomem (size)
- long size;
- {
- if (size > 0)
- {
- fatal ("virtual memory exhausted: can't allocate %ld bytes.", size);
- }
- else
- {
- fatal ("virtual memory exhausted.");
- }
- }
-
- /* Like mmalloc but get error if no storage available, and protect against
- the caller wanting to allocate zero bytes. Whether to return NULL for
- a zero byte request, or translate the request into a request for one
- byte of zero'd storage, is a religious issue. */
-
- PTR
- xmmalloc (md, size)
- PTR md;
- long size;
- {
- register PTR val;
-
- if (size == 0)
- {
- val = NULL;
- }
- else if ((val = mmalloc (md, size)) == NULL)
- {
- nomem (size);
- }
- return (val);
- }
-
- /* Like mrealloc but get error if no storage available. */
-
- PTR
- xmrealloc (md, ptr, size)
- PTR md;
- PTR ptr;
- long size;
- {
- register PTR val;
-
- if (ptr != NULL)
- {
- val = mrealloc (md, ptr, size);
- }
- else
- {
- val = mmalloc (md, size);
- }
- if (val == NULL)
- {
- nomem (size);
- }
- return (val);
- }
-
- /* Like malloc but get error if no storage available, and protect against
- the caller wanting to allocate zero bytes. */
-
- PTR
- xmalloc (size)
- long size;
- {
- return (xmmalloc ((PTR) NULL, size));
- }
-
- /* Like mrealloc but get error if no storage available. */
-
- PTR
- xrealloc (ptr, size)
- PTR ptr;
- long size;
- {
- return (xmrealloc ((PTR) NULL, ptr, size));
- }
-
-
- /* My replacement for the read system call.
- Used like `read' but keeps going if `read' returns too soon. */
-
- int
- myread (desc, addr, len)
- int desc;
- char *addr;
- int len;
- {
- register int val;
- int orglen = len;
-
- while (len > 0)
- {
- val = read (desc, addr, len);
- if (val < 0)
- return val;
- if (val == 0)
- return orglen - len;
- len -= val;
- addr += val;
- }
- return orglen;
- }
-
- /* Make a copy of the string at PTR with SIZE characters
- (and add a null character at the end in the copy).
- Uses malloc to get the space. Returns the address of the copy. */
-
- char *
- savestring (ptr, size)
- const char *ptr;
- int size;
- {
- register char *p = (char *) xmalloc (size + 1);
- memcpy (p, ptr, size);
- p[size] = 0;
- return p;
- }
-
- char *
- msavestring (md, ptr, size)
- PTR md;
- const char *ptr;
- int size;
- {
- register char *p = (char *) xmmalloc (md, size + 1);
- memcpy (p, ptr, size);
- p[size] = 0;
- return p;
- }
-
- /* The "const" is so it compiles under DGUX (which prototypes strsave
- in <string.h>. FIXME: This should be named "xstrsave", shouldn't it?
- Doesn't real strsave return NULL if out of memory? */
- char *
- strsave (ptr)
- const char *ptr;
- {
- return savestring (ptr, strlen (ptr));
- }
-
- char *
- mstrsave (md, ptr)
- PTR md;
- const char *ptr;
- {
- return (msavestring (md, ptr, strlen (ptr)));
- }
-
- void
- print_spaces (n, file)
- register int n;
- register FILE *file;
- {
- while (n-- > 0)
- fputc (' ', file);
- }
-
- /* Print a host address. */
-
- void
- gdb_print_address (addr, stream)
- PTR addr;
- GDB_FILE *stream;
- {
-
- /* We could use the %p conversion specifier to fprintf if we had any
- way of knowing whether this host supports it. But the following
- should work on the Alpha and on 32 bit machines. */
-
- fprintf_filtered (stream, "0x%lx", (unsigned long)addr);
- }
-
- /* Ask user a y-or-n question and return 1 iff answer is yes.
- Takes three args which are given to printf to print the question.
- The first, a control string, should end in "? ".
- It should not say how to answer, because we do that. */
-
- /* VARARGS */
- int
- query (va_alist)
- va_dcl
- {
- va_list args;
- char *ctlstr;
- register int answer;
- register int ans2;
- int retval;
-
- if (query_hook)
- {
- va_start (args);
- return query_hook (args);
- }
-
- /* Automatically answer "yes" if input is not from a terminal. */
- if (!input_from_terminal_p ())
- return 1;
-
- while (1)
- {
- wrap_here (""); /* Flush any buffered output */
- gdb_flush (gdb_stdout);
-
- if (annotation_level > 1)
- printf_filtered ("\n\032\032pre-query\n");
-
- va_start (args);
- ctlstr = va_arg (args, char *);
- vfprintf_filtered (gdb_stdout, ctlstr, args);
- va_end (args);
- printf_filtered ("(y or n) ");
-
- if (annotation_level > 1)
- printf_filtered ("\n\032\032query\n");
-
- gdb_flush (gdb_stdout);
- answer = fgetc (stdin);
- clearerr (stdin); /* in case of C-d */
- if (answer == EOF) /* C-d */
- {
- retval = 1;
- break;
- }
- if (answer != '\n') /* Eat rest of input line, to EOF or newline */
- do
- {
- ans2 = fgetc (stdin);
- clearerr (stdin);
- }
- while (ans2 != EOF && ans2 != '\n');
- if (answer >= 'a')
- answer -= 040;
- if (answer == 'Y')
- {
- retval = 1;
- break;
- }
- if (answer == 'N')
- {
- retval = 0;
- break;
- }
- printf_filtered ("Please answer y or n.\n");
- }
-
- if (annotation_level > 1)
- printf_filtered ("\n\032\032post-query\n");
- return retval;
- }
-
-
- /* Parse a C escape sequence. STRING_PTR points to a variable
- containing a pointer to the string to parse. That pointer
- should point to the character after the \. That pointer
- is updated past the characters we use. The value of the
- escape sequence is returned.
-
- A negative value means the sequence \ newline was seen,
- which is supposed to be equivalent to nothing at all.
-
- If \ is followed by a null character, we return a negative
- value and leave the string pointer pointing at the null character.
-
- If \ is followed by 000, we return 0 and leave the string pointer
- after the zeros. A value of 0 does not mean end of string. */
-
- int
- parse_escape (string_ptr)
- char **string_ptr;
- {
- register int c = *(*string_ptr)++;
- switch (c)
- {
- case 'a':
- return 007; /* Bell (alert) char */
- case 'b':
- return '\b';
- case 'e': /* Escape character */
- return 033;
- case 'f':
- return '\f';
- case 'n':
- return '\n';
- case 'r':
- return '\r';
- case 't':
- return '\t';
- case 'v':
- return '\v';
- case '\n':
- return -2;
- case 0:
- (*string_ptr)--;
- return 0;
- case '^':
- c = *(*string_ptr)++;
- if (c == '\\')
- c = parse_escape (string_ptr);
- if (c == '?')
- return 0177;
- return (c & 0200) | (c & 037);
-
- case '0':
- case '1':
- case '2':
- case '3':
- case '4':
- case '5':
- case '6':
- case '7':
- {
- register int i = c - '0';
- register int count = 0;
- while (++count < 3)
- {
- if ((c = *(*string_ptr)++) >= '0' && c <= '7')
- {
- i *= 8;
- i += c - '0';
- }
- else
- {
- (*string_ptr)--;
- break;
- }
- }
- return i;
- }
- default:
- return c;
- }
- }
-
- /* Print the character C on STREAM as part of the contents of a literal
- string whose delimiter is QUOTER. Note that this routine should only
- be call for printing things which are independent of the language
- of the program being debugged. */
-
- void
- gdb_printchar (c, stream, quoter)
- register int c;
- FILE *stream;
- int quoter;
- {
-
- c &= 0xFF; /* Avoid sign bit follies */
-
- if ( c < 0x20 || /* Low control chars */
- (c >= 0x7F && c < 0xA0) || /* DEL, High controls */
- (sevenbit_strings && c >= 0x80)) { /* high order bit set */
- switch (c)
- {
- case '\n':
- fputs_filtered ("\\n", stream);
- break;
- case '\b':
- fputs_filtered ("\\b", stream);
- break;
- case '\t':
- fputs_filtered ("\\t", stream);
- break;
- case '\f':
- fputs_filtered ("\\f", stream);
- break;
- case '\r':
- fputs_filtered ("\\r", stream);
- break;
- case '\033':
- fputs_filtered ("\\e", stream);
- break;
- case '\007':
- fputs_filtered ("\\a", stream);
- break;
- default:
- fprintf_filtered (stream, "\\%.3o", (unsigned int) c);
- break;
- }
- } else {
- if (c == '\\' || c == quoter)
- fputs_filtered ("\\", stream);
- fprintf_filtered (stream, "%c", c);
- }
- }
-
- /* Number of lines per page or UINT_MAX if paging is disabled. */
- static unsigned int lines_per_page;
- /* Number of chars per line or UNIT_MAX is line folding is disabled. */
- static unsigned int chars_per_line;
- /* Current count of lines printed on this page, chars on this line. */
- static unsigned int lines_printed, chars_printed;
-
- /* Buffer and start column of buffered text, for doing smarter word-
- wrapping. When someone calls wrap_here(), we start buffering output
- that comes through fputs_filtered(). If we see a newline, we just
- spit it out and forget about the wrap_here(). If we see another
- wrap_here(), we spit it out and remember the newer one. If we see
- the end of the line, we spit out a newline, the indent, and then
- the buffered output. */
-
- /* Malloc'd buffer with chars_per_line+2 bytes. Contains characters which
- are waiting to be output (they have already been counted in chars_printed).
- When wrap_buffer[0] is null, the buffer is empty. */
- static char *wrap_buffer;
-
- /* Pointer in wrap_buffer to the next character to fill. */
- static char *wrap_pointer;
-
- /* String to indent by if the wrap occurs. Must not be NULL if wrap_column
- is non-zero. */
- static char *wrap_indent;
-
- /* Column number on the screen where wrap_buffer begins, or 0 if wrapping
- is not in effect. */
- static int wrap_column;
-
- /* ARGSUSED */
- static void
- set_width_command (args, from_tty, c)
- char *args;
- int from_tty;
- struct cmd_list_element *c;
- {
- if (!wrap_buffer)
- {
- wrap_buffer = (char *) xmalloc (chars_per_line + 2);
- wrap_buffer[0] = '\0';
- }
- else
- wrap_buffer = (char *) xrealloc (wrap_buffer, chars_per_line + 2);
- wrap_pointer = wrap_buffer; /* Start it at the beginning */
- }
-
- /* Wait, so the user can read what's on the screen. Prompt the user
- to continue by pressing RETURN. */
-
- static void
- prompt_for_continue ()
- {
- char *ignore;
- char cont_prompt[120];
-
- if (annotation_level > 1)
- printf_unfiltered ("\n\032\032pre-prompt-for-continue\n");
-
- strcpy (cont_prompt,
- "---Type <return> to continue, or q <return> to quit---");
- if (annotation_level > 1)
- strcat (cont_prompt, "\n\032\032prompt-for-continue\n");
-
- /* We must do this *before* we call gdb_readline, else it will eventually
- call us -- thinking that we're trying to print beyond the end of the
- screen. */
- reinitialize_more_filter ();
-
- immediate_quit++;
- /* On a real operating system, the user can quit with SIGINT.
- But not on GO32.
-
- 'q' is provided on all systems so users don't have to change habits
- from system to system, and because telling them what to do in
- the prompt is more user-friendly than expecting them to think of
- SIGINT. */
- /* Call readline, not gdb_readline, because GO32 readline handles control-C
- whereas control-C to gdb_readline will cause the user to get dumped
- out to DOS. */
- ignore = readline (cont_prompt);
-
- if (annotation_level > 1)
- printf_unfiltered ("\n\032\032post-prompt-for-continue\n");
-
- if (ignore)
- {
- char *p = ignore;
- while (*p == ' ' || *p == '\t')
- ++p;
- if (p[0] == 'q')
- request_quit (SIGINT);
- free (ignore);
- }
- immediate_quit--;
-
- /* Now we have to do this again, so that GDB will know that it doesn't
- need to save the ---Type <return>--- line at the top of the screen. */
- reinitialize_more_filter ();
-
- dont_repeat (); /* Forget prev cmd -- CR won't repeat it. */
- }
-
- /* Reinitialize filter; ie. tell it to reset to original values. */
-
- void
- reinitialize_more_filter ()
- {
- lines_printed = 0;
- chars_printed = 0;
- }
-
- /* Indicate that if the next sequence of characters overflows the line,
- a newline should be inserted here rather than when it hits the end.
- If INDENT is non-null, it is a string to be printed to indent the
- wrapped part on the next line. INDENT must remain accessible until
- the next call to wrap_here() or until a newline is printed through
- fputs_filtered().
-
- If the line is already overfull, we immediately print a newline and
- the indentation, and disable further wrapping.
-
- If we don't know the width of lines, but we know the page height,
- we must not wrap words, but should still keep track of newlines
- that were explicitly printed.
-
- INDENT should not contain tabs, as that will mess up the char count
- on the next line. FIXME.
-
- This routine is guaranteed to force out any output which has been
- squirreled away in the wrap_buffer, so wrap_here ((char *)0) can be
- used to force out output from the wrap_buffer. */
-
- void
- wrap_here(indent)
- char *indent;
- {
- /* This should have been allocated, but be paranoid anyway. */
- if (!wrap_buffer)
- abort ();
-
- if (wrap_buffer[0])
- {
- *wrap_pointer = '\0';
- fputs_unfiltered (wrap_buffer, gdb_stdout);
- }
- wrap_pointer = wrap_buffer;
- wrap_buffer[0] = '\0';
- if (chars_per_line == UINT_MAX) /* No line overflow checking */
- {
- wrap_column = 0;
- }
- else if (chars_printed >= chars_per_line)
- {
- puts_filtered ("\n");
- if (indent != NULL)
- puts_filtered (indent);
- wrap_column = 0;
- }
- else
- {
- wrap_column = chars_printed;
- if (indent == NULL)
- wrap_indent = "";
- else
- wrap_indent = indent;
- }
- }
-
- /* Ensure that whatever gets printed next, using the filtered output
- commands, starts at the beginning of the line. I.E. if there is
- any pending output for the current line, flush it and start a new
- line. Otherwise do nothing. */
-
- void
- begin_line ()
- {
- if (chars_printed > 0)
- {
- puts_filtered ("\n");
- }
- }
-
-
- GDB_FILE *
- gdb_fopen (name, mode)
- char * name;
- char * mode;
- {
- return fopen (name, mode);
- }
-
- void
- gdb_flush (stream)
- FILE *stream;
- {
- if (flush_hook)
- {
- flush_hook (stream);
- return;
- }
-
- fflush (stream);
- }
-
- /* Like fputs but if FILTER is true, pause after every screenful.
-
- Regardless of FILTER can wrap at points other than the final
- character of a line.
-
- Unlike fputs, fputs_maybe_filtered does not return a value.
- It is OK for LINEBUFFER to be NULL, in which case just don't print
- anything.
-
- Note that a longjmp to top level may occur in this routine (only if
- FILTER is true) (since prompt_for_continue may do so) so this
- routine should not be called when cleanups are not in place. */
-
- static void
- fputs_maybe_filtered (linebuffer, stream, filter)
- const char *linebuffer;
- FILE *stream;
- int filter;
- {
- const char *lineptr;
-
- if (linebuffer == 0)
- return;
-
- /* Don't do any filtering if it is disabled. */
- if (stream != gdb_stdout
- || (lines_per_page == UINT_MAX && chars_per_line == UINT_MAX))
- {
- fputs_unfiltered (linebuffer, stream);
- return;
- }
-
- /* Go through and output each character. Show line extension
- when this is necessary; prompt user for new page when this is
- necessary. */
-
- lineptr = linebuffer;
- while (*lineptr)
- {
- /* Possible new page. */
- if (filter &&
- (lines_printed >= lines_per_page - 1))
- prompt_for_continue ();
-
- while (*lineptr && *lineptr != '\n')
- {
- /* Print a single line. */
- if (*lineptr == '\t')
- {
- if (wrap_column)
- *wrap_pointer++ = '\t';
- else
- fputc_unfiltered ('\t', stream);
- /* Shifting right by 3 produces the number of tab stops
- we have already passed, and then adding one and
- shifting left 3 advances to the next tab stop. */
- chars_printed = ((chars_printed >> 3) + 1) << 3;
- lineptr++;
- }
- else
- {
- if (wrap_column)
- *wrap_pointer++ = *lineptr;
- else
- fputc_unfiltered (*lineptr, stream);
- chars_printed++;
- lineptr++;
- }
-
- if (chars_printed >= chars_per_line)
- {
- unsigned int save_chars = chars_printed;
-
- chars_printed = 0;
- lines_printed++;
- /* If we aren't actually wrapping, don't output newline --
- if chars_per_line is right, we probably just overflowed
- anyway; if it's wrong, let us keep going. */
- if (wrap_column)
- fputc_unfiltered ('\n', stream);
-
- /* Possible new page. */
- if (lines_printed >= lines_per_page - 1)
- prompt_for_continue ();
-
- /* Now output indentation and wrapped string */
- if (wrap_column)
- {
- fputs_unfiltered (wrap_indent, stream);
- *wrap_pointer = '\0'; /* Null-terminate saved stuff */
- fputs_unfiltered (wrap_buffer, stream); /* and eject it */
- /* FIXME, this strlen is what prevents wrap_indent from
- containing tabs. However, if we recurse to print it
- and count its chars, we risk trouble if wrap_indent is
- longer than (the user settable) chars_per_line.
- Note also that this can set chars_printed > chars_per_line
- if we are printing a long string. */
- chars_printed = strlen (wrap_indent)
- + (save_chars - wrap_column);
- wrap_pointer = wrap_buffer; /* Reset buffer */
- wrap_buffer[0] = '\0';
- wrap_column = 0; /* And disable fancy wrap */
- }
- }
- }
-
- if (*lineptr == '\n')
- {
- chars_printed = 0;
- wrap_here ((char *)0); /* Spit out chars, cancel further wraps */
- lines_printed++;
- fputc_unfiltered ('\n', stream);
- lineptr++;
- }
- }
- }
-
- void
- fputs_filtered (linebuffer, stream)
- const char *linebuffer;
- FILE *stream;
- {
- fputs_maybe_filtered (linebuffer, stream, 1);
- }
-
- void
- putc_unfiltered (c)
- int c;
- {
- char buf[2];
- buf[0] = c;
- buf[1] = 0;
- fputs_unfiltered (buf, gdb_stdout);
- }
-
- void
- fputc_unfiltered (c, stream)
- int c;
- FILE * stream;
- {
- char buf[2];
- buf[0] = c;
- buf[1] = 0;
- fputs_unfiltered (buf, stream);
- }
-
-
- /* Print a variable number of ARGS using format FORMAT. If this
- information is going to put the amount written (since the last call
- to REINITIALIZE_MORE_FILTER or the last page break) over the page size,
- call prompt_for_continue to get the users permision to continue.
-
- Unlike fprintf, this function does not return a value.
-
- We implement three variants, vfprintf (takes a vararg list and stream),
- fprintf (takes a stream to write on), and printf (the usual).
-
- Note also that a longjmp to top level may occur in this routine
- (since prompt_for_continue may do so) so this routine should not be
- called when cleanups are not in place. */
-
- static void
- vfprintf_maybe_filtered (stream, format, args, filter)
- FILE *stream;
- char *format;
- va_list args;
- int filter;
- {
- char *linebuffer;
- struct cleanup *old_cleanups;
-
- vasprintf (&linebuffer, format, args);
- if (linebuffer == NULL)
- {
- fputs_unfiltered ("\ngdb: virtual memory exhausted.\n", gdb_stderr);
- exit (1);
- }
- old_cleanups = make_cleanup (free, linebuffer);
- fputs_maybe_filtered (linebuffer, stream, filter);
- do_cleanups (old_cleanups);
- }
-
-
- void
- vfprintf_filtered (stream, format, args)
- FILE *stream;
- char *format;
- va_list args;
- {
- vfprintf_maybe_filtered (stream, format, args, 1);
- }
-
- void
- vfprintf_unfiltered (stream, format, args)
- FILE *stream;
- char *format;
- va_list args;
- {
- char *linebuffer;
- struct cleanup *old_cleanups;
-
- vasprintf (&linebuffer, format, args);
- if (linebuffer == NULL)
- {
- fputs_unfiltered ("\ngdb: virtual memory exhausted.\n", gdb_stderr);
- exit (1);
- }
- old_cleanups = make_cleanup (free, linebuffer);
- fputs_unfiltered (linebuffer, stream);
- do_cleanups (old_cleanups);
- }
-
- void
- vprintf_filtered (format, args)
- char *format;
- va_list args;
- {
- vfprintf_maybe_filtered (gdb_stdout, format, args, 1);
- }
-
- void
- vprintf_unfiltered (format, args)
- char *format;
- va_list args;
- {
- vfprintf_unfiltered (gdb_stdout, format, args);
- }
-
- /* VARARGS */
- void
- fprintf_filtered (va_alist)
- va_dcl
- {
- va_list args;
- FILE *stream;
- char *format;
-
- va_start (args);
- stream = va_arg (args, FILE *);
- format = va_arg (args, char *);
-
- vfprintf_filtered (stream, format, args);
- va_end (args);
- }
-
- /* VARARGS */
- void
- fprintf_unfiltered (va_alist)
- va_dcl
- {
- va_list args;
- FILE *stream;
- char *format;
-
- va_start (args);
- stream = va_arg (args, FILE *);
- format = va_arg (args, char *);
-
- vfprintf_unfiltered (stream, format, args);
- va_end (args);
- }
-
- /* Like fprintf_filtered, but prints its result indented.
- Called as fprintfi_filtered (spaces, stream, format, ...); */
-
- /* VARARGS */
- void
- fprintfi_filtered (va_alist)
- va_dcl
- {
- va_list args;
- int spaces;
- FILE *stream;
- char *format;
-
- va_start (args);
- spaces = va_arg (args, int);
- stream = va_arg (args, FILE *);
- format = va_arg (args, char *);
- print_spaces_filtered (spaces, stream);
-
- vfprintf_filtered (stream, format, args);
- va_end (args);
- }
-
-
- /* VARARGS */
- void
- printf_filtered (va_alist)
- va_dcl
- {
- va_list args;
- char *format;
-
- va_start (args);
- format = va_arg (args, char *);
-
- vfprintf_filtered (gdb_stdout, format, args);
- va_end (args);
- }
-
-
- /* VARARGS */
- void
- printf_unfiltered (va_alist)
- va_dcl
- {
- va_list args;
- char *format;
-
- va_start (args);
- format = va_arg (args, char *);
-
- vfprintf_unfiltered (gdb_stdout, format, args);
- va_end (args);
- }
-
- /* Like printf_filtered, but prints it's result indented.
- Called as printfi_filtered (spaces, format, ...); */
-
- /* VARARGS */
- void
- printfi_filtered (va_alist)
- va_dcl
- {
- va_list args;
- int spaces;
- char *format;
-
- va_start (args);
- spaces = va_arg (args, int);
- format = va_arg (args, char *);
- print_spaces_filtered (spaces, gdb_stdout);
- vfprintf_filtered (gdb_stdout, format, args);
- va_end (args);
- }
-
- /* Easy -- but watch out!
-
- This routine is *not* a replacement for puts()! puts() appends a newline.
- This one doesn't, and had better not! */
-
- void
- puts_filtered (string)
- char *string;
- {
- fputs_filtered (string, gdb_stdout);
- }
-
- void
- puts_unfiltered (string)
- char *string;
- {
- fputs_unfiltered (string, gdb_stdout);
- }
-
- /* Return a pointer to N spaces and a null. The pointer is good
- until the next call to here. */
- char *
- n_spaces (n)
- int n;
- {
- register char *t;
- static char *spaces;
- static int max_spaces;
-
- if (n > max_spaces)
- {
- if (spaces)
- free (spaces);
- spaces = (char *) xmalloc (n+1);
- for (t = spaces+n; t != spaces;)
- *--t = ' ';
- spaces[n] = '\0';
- max_spaces = n;
- }
-
- return spaces + max_spaces - n;
- }
-
- /* Print N spaces. */
- void
- print_spaces_filtered (n, stream)
- int n;
- FILE *stream;
- {
- fputs_filtered (n_spaces (n), stream);
- }
-
- /* C++ demangler stuff. */
-
- /* fprintf_symbol_filtered attempts to demangle NAME, a symbol in language
- LANG, using demangling args ARG_MODE, and print it filtered to STREAM.
- If the name is not mangled, or the language for the name is unknown, or
- demangling is off, the name is printed in its "raw" form. */
-
- void
- fprintf_symbol_filtered (stream, name, lang, arg_mode)
- FILE *stream;
- char *name;
- enum language lang;
- int arg_mode;
- {
- char *demangled;
-
- if (name != NULL)
- {
- /* If user wants to see raw output, no problem. */
- if (!demangle)
- {
- fputs_filtered (name, stream);
- }
- else
- {
- switch (lang)
- {
- case language_cplus:
- demangled = cplus_demangle (name, arg_mode);
- break;
- case language_chill:
- demangled = chill_demangle (name);
- break;
- default:
- demangled = NULL;
- break;
- }
- fputs_filtered (demangled ? demangled : name, stream);
- if (demangled != NULL)
- {
- free (demangled);
- }
- }
- }
- }
-
- /* Do a strcmp() type operation on STRING1 and STRING2, ignoring any
- differences in whitespace. Returns 0 if they match, non-zero if they
- don't (slightly different than strcmp()'s range of return values).
-
- As an extra hack, string1=="FOO(ARGS)" matches string2=="FOO".
- This "feature" is useful when searching for matching C++ function names
- (such as if the user types 'break FOO', where FOO is a mangled C++
- function). */
-
- int
- strcmp_iw (string1, string2)
- const char *string1;
- const char *string2;
- {
- while ((*string1 != '\0') && (*string2 != '\0'))
- {
- while (isspace (*string1))
- {
- string1++;
- }
- while (isspace (*string2))
- {
- string2++;
- }
- if (*string1 != *string2)
- {
- break;
- }
- if (*string1 != '\0')
- {
- string1++;
- string2++;
- }
- }
- return (*string1 != '\0' && *string1 != '(') || (*string2 != '\0');
- }
-
-
- void
- initialize_utils ()
- {
- struct cmd_list_element *c;
-
- c = add_set_cmd ("width", class_support, var_uinteger,
- (char *)&chars_per_line,
- "Set number of characters gdb thinks are in a line.",
- &setlist);
- add_show_from_set (c, &showlist);
- c->function.sfunc = set_width_command;
-
- add_show_from_set
- (add_set_cmd ("height", class_support,
- var_uinteger, (char *)&lines_per_page,
- "Set number of lines gdb thinks are in a page.", &setlist),
- &showlist);
-
- /* These defaults will be used if we are unable to get the correct
- values from termcap. */
- #if defined(__GO32__) || defined(WIN32)
- lines_per_page = ScreenRows();
- chars_per_line = ScreenCols();
- #else
- lines_per_page = 24;
- chars_per_line = 80;
- /* Initialize the screen height and width from termcap. */
- {
- char *termtype = getenv ("TERM");
-
- /* Positive means success, nonpositive means failure. */
- int status;
-
- /* 2048 is large enough for all known terminals, according to the
- GNU termcap manual. */
- char term_buffer[2048];
-
- if (termtype)
- {
- status = tgetent (term_buffer, termtype);
- if (status > 0)
- {
- int val;
-
- val = tgetnum ("li");
- if (val >= 0)
- lines_per_page = val;
- else
- /* The number of lines per page is not mentioned
- in the terminal description. This probably means
- that paging is not useful (e.g. emacs shell window),
- so disable paging. */
- lines_per_page = UINT_MAX;
-
- val = tgetnum ("co");
- if (val >= 0)
- chars_per_line = val;
- }
- }
- }
-
- #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
-
- /* If there is a better way to determine the window size, use it. */
- SIGWINCH_HANDLER ();
- #endif
- #endif
- /* If the output is not a terminal, don't paginate it. */
- if (!ISATTY (gdb_stdout))
- lines_per_page = UINT_MAX;
-
- set_width_command ((char *)NULL, 0, c);
-
- add_show_from_set
- (add_set_cmd ("demangle", class_support, var_boolean,
- (char *)&demangle,
- "Set demangling of encoded C++ names when displaying symbols.",
- &setprintlist),
- &showprintlist);
-
- add_show_from_set
- (add_set_cmd ("sevenbit-strings", class_support, var_boolean,
- (char *)&sevenbit_strings,
- "Set printing of 8-bit characters in strings as \\nnn.",
- &setprintlist),
- &showprintlist);
-
- add_show_from_set
- (add_set_cmd ("asm-demangle", class_support, var_boolean,
- (char *)&asm_demangle,
- "Set demangling of C++ names in disassembly listings.",
- &setprintlist),
- &showprintlist);
- }
-
- /* Machine specific function to handle SIGWINCH signal. */
-
- #ifdef SIGWINCH_HANDLER_BODY
- SIGWINCH_HANDLER_BODY
- #endif
-
-