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Diffstat (limited to 'gnu/usr.bin/gdb/gdb/utils.c')
| -rw-r--r-- | gnu/usr.bin/gdb/gdb/utils.c | 1790 |
1 files changed, 0 insertions, 1790 deletions
diff --git a/gnu/usr.bin/gdb/gdb/utils.c b/gnu/usr.bin/gdb/gdb/utils.c deleted file mode 100644 index 57490131bf59..000000000000 --- a/gnu/usr.bin/gdb/gdb/utils.c +++ /dev/null @@ -1,1790 +0,0 @@ -/* General utility routines for GDB, the GNU debugger. - Copyright 1986, 1989, 1990, 1991, 1992 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__) -#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; - - error_begin (); - va_start (args); - 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); -} - - -#ifdef __GO32__ - -/* 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 -#ifdef __GO32__ -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) - -PTR -mmalloc (md, size) - PTR md; - long size; -{ - return (malloc (size)); -} - -PTR -mrealloc (md, ptr, size) - PTR md; - PTR ptr; - long 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; - - /* 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; -{ - 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__) - 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 - |