From 6d52618b15cbe25ed4822ac51321db292f28ccda Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Fri, 20 Dec 1996 01:39:50 +0000 Subject: Update from main archive 961219 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Thu Dec 19 23:28:33 1996 Ulrich Drepper * resolv/resolv.h: Update from BIND 4.9.5-P1. * resolv/res_comp.c: Likewise. * resolv/res_debug.c: Likewise. * resolv/Banner: Update version number. Thu Dec 19 20:58:53 1996 Ulrich Drepper * elf/dlfcn.h: Add extern "C" wrapper. * io/utime.h: Don't define NULL since this isn't allowed in POSIX. * io/sys/stat.h: Declare `lstat' only if __USE_BSD || __USE_XOPEN_EXTENDED. * locale/locale.h: Define NULL. * math/math.c: Don't include to define math errors. * stdlib/stdlib.h: Likewise. * posix/unistd.h: Don't declare environ. * posix/sys/utsname.h (struct utsname): Declare member domainname as __domainname is !__USE_GNU. * signal/signal.h: Declare size_t only if __USE_BSD || __USE_XOPEN_EXTENDED. * stdio/stdio.h: Don't declare cuserid when __USE_POSIX, but instead when __USE_XOPEN. * string/string.h: Define strndup only if __USE_GNU. * sysdeps/unix/sysv/linux/clock.c: New file. * sysdeps/unix/sysv/linux/timebits.h: Define CLOCKS_PER_SEC as 1000000 per X/Open standard. * features.h: Add code to recognize _POSIX_C_SOURCE value 199309. Define __USE_POSIX199309. * posix/unistd.h: Declare fdatasync only if __USE_POSIX199309. * time/time.c: Declare nanosleep only if __USE_POSIX199309. Patches by Rüdiger Helsch . * locale/locale.h: Add declaration of newlocale and freelocale. * new-malloc/Makefile (distibute): Add mtrace.awk. (dist-routines): Add mcheck and mtrace. (install-lib, non-lib.a): Define as libmcheck.a. * new-malloc/malloc.h: Add declaration of __malloc_initialized. * new-malloc/mcheck.c: New file. * new-malloc/mcheck.h: New file. * new-malloc/mtrace.c: New file. * new-malloc/mtrace.awk: New file. * posix/unistd.h: Correct prototype for usleep. * sysdeps/unix/bsd/usleep.c: De-ANSI-declfy. Correct return type. * sysdeps/unix/sysv/linux/usleep.c: Real implementation based on nanosleep. * signal/signal.h: Change protoype of __sigpause to take two arguments. Remove prototype for sigpause. Add two different macros named sigpause selected when __USE_BSD or __USE_XOPEN are defined. This is necessary since the old BSD definition of theis function collides with the X/Open definition. * sysdeps/posix/sigpause.c: Change function definition to also fit X/Open definition. * sysdeps/libm-i387/e_exp.S: Make sure stack is empty when the function is left. * sysdeps/libm-i387/e_expl.S: Likewise. Patch by HJ Lu. 1996-12-17 Paul Eggert * many, many files: Spelling corrections. * catgets/catgetsinfo.h (mmapped): Renamed from mmaped (in struct catalog_info.status). * mach/err_kern.sub (err_codes_unix), string/stratcliff.c (main): Fix spelling in message. * po/libc.pot: Fix spelling in message for `zic'; this anticipates a fix in the tzcode distribution. Wed Dec 18 15:48:02 1996 Ulrich Drepper * time/strftime.c: Implement ^ flag to cause output be converted to use upper case characters. * time/zic.c: Update from ADO tzcode1996n. Wed Dec 18 14:29:24 1996 Erik Naggum * time/strftime.c (add): Don't change global `i' until all is over. Define NULL is not already defined. Tue Dec 17 09:49:03 1996 Andreas Schwab * libio/iovsprintf.c (_IO_vsprintf): Change `&sf' to `&sf._sbf._f' to avoid the need for a cast. * libio/iovsscanf.c (_IO_vsscanf): Likewise. * sunrpc/rpc/xdr.h: Add prototype for xdr_free. --- malloc/mcheck.c | 232 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 232 insertions(+) create mode 100644 malloc/mcheck.c (limited to 'malloc/mcheck.c') diff --git a/malloc/mcheck.c b/malloc/mcheck.c new file mode 100644 index 0000000..7f1112e --- /dev/null +++ b/malloc/mcheck.c @@ -0,0 +1,232 @@ +/* Standard debugging hooks for `malloc'. + Copyright (C) 1990,91,92,93,94,95,96 Free Software Foundation, Inc. + Written May 1989 by Mike Haertel. + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + This library 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with this library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. + + The author may be reached (Email) at the address mike@ai.mit.edu, + or (US mail) as Mike Haertel c/o Free Software Foundation. */ + +#ifndef _MALLOC_INTERNAL +#define _MALLOC_INTERNAL +#include +#include +#include +#endif + +/* Old hook values. */ +static void (*old_free_hook) __P ((__ptr_t ptr)); +static __ptr_t (*old_malloc_hook) __P ((__malloc_size_t size)); +static __ptr_t (*old_realloc_hook) __P ((__ptr_t ptr, __malloc_size_t size)); + +/* Function to call when something awful happens. */ +static void (*abortfunc) __P ((enum mcheck_status)); + +/* Arbitrary magical numbers. */ +#define MAGICWORD 0xfedabeeb +#define MAGICFREE 0xd8675309 +#define MAGICBYTE ((char) 0xd7) +#define MALLOCFLOOD ((char) 0x93) +#define FREEFLOOD ((char) 0x95) + +struct hdr + { + __malloc_size_t size; /* Exact size requested by user. */ + unsigned long int magic; /* Magic number to check header integrity. */ + }; + +#if defined(_LIBC) || defined(STDC_HEADERS) || defined(USG) +#define flood memset +#else +static void flood __P ((__ptr_t, int, __malloc_size_t)); +static void +flood (ptr, val, size) + __ptr_t ptr; + int val; + __malloc_size_t size; +{ + char *cp = ptr; + while (size--) + *cp++ = val; +} +#endif + +static enum mcheck_status checkhdr __P ((const struct hdr *)); +static enum mcheck_status +checkhdr (hdr) + const struct hdr *hdr; +{ + enum mcheck_status status; + switch (hdr->magic) + { + default: + status = MCHECK_HEAD; + break; + case MAGICFREE: + status = MCHECK_FREE; + break; + case MAGICWORD: + if (((char *) &hdr[1])[hdr->size] != MAGICBYTE) + status = MCHECK_TAIL; + else + status = MCHECK_OK; + break; + } + if (status != MCHECK_OK) + (*abortfunc) (status); + return status; +} + +static void freehook __P ((__ptr_t)); +static void +freehook (ptr) + __ptr_t ptr; +{ + if (ptr) + { + struct hdr *hdr = ((struct hdr *) ptr) - 1; + checkhdr (hdr); + hdr->magic = MAGICFREE; + flood (ptr, FREEFLOOD, hdr->size); + ptr = (__ptr_t) hdr; + } + __free_hook = old_free_hook; + free (ptr); + __free_hook = freehook; +} + +static __ptr_t mallochook __P ((__malloc_size_t)); +static __ptr_t +mallochook (size) + __malloc_size_t size; +{ + struct hdr *hdr; + + __malloc_hook = old_malloc_hook; + hdr = (struct hdr *) malloc (sizeof (struct hdr) + size + 1); + __malloc_hook = mallochook; + if (hdr == NULL) + return NULL; + + hdr->size = size; + hdr->magic = MAGICWORD; + ((char *) &hdr[1])[size] = MAGICBYTE; + flood ((__ptr_t) (hdr + 1), MALLOCFLOOD, size); + return (__ptr_t) (hdr + 1); +} + +static __ptr_t reallochook __P ((__ptr_t, __malloc_size_t)); +static __ptr_t +reallochook (ptr, size) + __ptr_t ptr; + __malloc_size_t size; +{ + struct hdr *hdr; + __malloc_size_t osize; + + if (ptr) + { + hdr = ((struct hdr *) ptr) - 1; + osize = hdr->size; + + checkhdr (hdr); + if (size < osize) + flood ((char *) ptr + size, FREEFLOOD, osize - size); + } + else + { + osize = 0; + hdr = NULL; + } + __free_hook = old_free_hook; + __malloc_hook = old_malloc_hook; + __realloc_hook = old_realloc_hook; + hdr = (struct hdr *) realloc ((__ptr_t) hdr, sizeof (struct hdr) + size + 1); + __free_hook = freehook; + __malloc_hook = mallochook; + __realloc_hook = reallochook; + if (hdr == NULL) + return NULL; + + hdr->size = size; + hdr->magic = MAGICWORD; + ((char *) &hdr[1])[size] = MAGICBYTE; + if (size > osize) + flood ((char *) (hdr + 1) + osize, MALLOCFLOOD, size - osize); + return (__ptr_t) (hdr + 1); +} + +static void mabort __P ((enum mcheck_status status)); +static void +mabort (status) + enum mcheck_status status; +{ + const char *msg; + switch (status) + { + case MCHECK_OK: + msg = _("memory is consistent, library is buggy"); + break; + case MCHECK_HEAD: + msg = _("memory clobbered before allocated block"); + break; + case MCHECK_TAIL: + msg = _("memory clobbered past end of allocated block"); + break; + case MCHECK_FREE: + msg = _("block freed twice"); + break; + default: + msg = _("bogus mcheck_status, library is buggy"); + break; + } +#ifdef _LIBC + __libc_fatal (msg); +#else + fprintf (stderr, "mcheck: %s\n", msg); + fflush (stderr); + abort (); +#endif +} + +static int mcheck_used = 0; + +int +mcheck (func) + void (*func) __P ((enum mcheck_status)); +{ + abortfunc = (func != NULL) ? func : &mabort; + + /* These hooks may not be safely inserted if malloc is already in use. */ + if (!__malloc_initialized && !mcheck_used) + { + old_free_hook = __free_hook; + __free_hook = freehook; + old_malloc_hook = __malloc_hook; + __malloc_hook = mallochook; + old_realloc_hook = __realloc_hook; + __realloc_hook = reallochook; + mcheck_used = 1; + } + + return mcheck_used ? 0 : -1; +} + +enum mcheck_status +mprobe (__ptr_t ptr) +{ + return mcheck_used ? checkhdr (ptr) : MCHECK_DISABLED; +} -- cgit v1.1