diff options
Diffstat (limited to 'lib/libc/stdlib')
| -rw-r--r-- | lib/libc/stdlib/Makefile.inc | 4 | ||||
| -rw-r--r-- | lib/libc/stdlib/calloc.c | 52 | ||||
| -rw-r--r-- | lib/libc/stdlib/malloc.3 | 20 | ||||
| -rw-r--r-- | lib/libc/stdlib/malloc.c | 52 |
4 files changed, 88 insertions, 40 deletions
diff --git a/lib/libc/stdlib/Makefile.inc b/lib/libc/stdlib/Makefile.inc index 980dd57..58842bf 100644 --- a/lib/libc/stdlib/Makefile.inc +++ b/lib/libc/stdlib/Makefile.inc @@ -1,10 +1,10 @@ # from @(#)Makefile.inc 8.3 (Berkeley) 2/4/95 -# $Id: Makefile.inc,v 1.8 1997/05/03 03:50:04 jb Exp $ +# $Id: Makefile.inc,v 1.9 1997/06/22 17:54:24 phk Exp $ # machine-independent stdlib sources .PATH: ${.CURDIR}/../libc/${MACHINE}/stdlib ${.CURDIR}/../libc/stdlib -SRCS+= abort.c atexit.c atof.c atoi.c atol.c bsearch.c div.c \ +SRCS+= abort.c atexit.c atof.c atoi.c atol.c bsearch.c calloc.c div.c \ exit.c getenv.c getopt.c getsubopt.c strhash.c heapsort.c labs.c \ ldiv.c malloc.c merge.c putenv.c qsort.c radixsort.c rand.c random.c \ realpath.c setenv.c strtod.c strtol.c strtoq.c strtoul.c \ diff --git a/lib/libc/stdlib/calloc.c b/lib/libc/stdlib/calloc.c new file mode 100644 index 0000000..7a83603 --- /dev/null +++ b/lib/libc/stdlib/calloc.c @@ -0,0 +1,52 @@ +/*- + * Copyright (c) 1990, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#if defined(LIBC_SCCS) && !defined(lint) +static char sccsid[] = "@(#)calloc.c 8.1 (Berkeley) 6/4/93"; +#endif /* LIBC_SCCS and not lint */ + +#include <stdlib.h> +#include <string.h> + +void * +calloc(num, size) + size_t num; + register size_t size; +{ + register void *p; + + size *= num; + if ( (p = malloc(size)) ) + bzero(p, size); + return(p); +} diff --git a/lib/libc/stdlib/malloc.3 b/lib/libc/stdlib/malloc.3 index a0262c1..ef77e80 100644 --- a/lib/libc/stdlib/malloc.3 +++ b/lib/libc/stdlib/malloc.3 @@ -34,7 +34,7 @@ .\" SUCH DAMAGE. .\" .\" @(#)malloc.3 8.1 (Berkeley) 6/4/93 -.\" $Id: malloc.3,v 1.11 1997/06/12 12:45:45 phk Exp $ +.\" $Id: malloc.3,v 1.12 1997/06/22 17:54:27 phk Exp $ .\" .Dd August 27, 1996 .Dt MALLOC 3 @@ -119,7 +119,7 @@ is NULL, no action occurs. .Sh TUNING Once, when the first call is made to one of these memory allocation routines, various flags will be set or reset, which affect the -workings of this alloction implementation. +workings of this allocation implementation. .Pp The ``name'' of the file referenced by the symbolic link named .Pa /etc/malloc.conf , @@ -142,9 +142,16 @@ in these cases. .It J Each byte of new memory allocated by .Fn malloc -and +or +.Fn realloc +as well as all memory returned by +.Fn free +or .Fn realloc will be initialized to 0xd0. +This options also sets the +.Dq R +option. This is intended for debugging and will impact performance negatively. .It H Pass a hint to the kernel about pages unused by the allocation functions. @@ -183,8 +190,11 @@ extern char *malloc_options; malloc_options = "X"; .Ed .It Z -Initialize all allocated memory to nul bytes, and overwrite any -surrounding memory necessary for alignment reasons with 0xd0 bytes. +This option implicitly sets the +.Dq J +and +.Dq R +options, and then zeros out the bytes that were requested. This is intended for debugging and will impact performance negatively. .It < Reduce the size of the cache by a factor of two. diff --git a/lib/libc/stdlib/malloc.c b/lib/libc/stdlib/malloc.c index fb770f5..acd7e35 100644 --- a/lib/libc/stdlib/malloc.c +++ b/lib/libc/stdlib/malloc.c @@ -6,7 +6,7 @@ * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp * ---------------------------------------------------------------------------- * - * $Id: malloc.c,v 1.25 1997/06/12 12:45:45 phk Exp $ + * $Id: malloc.c,v 1.26 1997/06/22 17:54:27 phk Exp $ * */ @@ -58,7 +58,7 @@ # endif #endif /* __FreeBSD__ */ -#if defined(__sparc__) || defined(sun) +#if defined(__sparc__) && defined(sun) # define malloc_pageshirt 12U # define malloc_minsize 16U # define MAP_ANON (0) @@ -74,7 +74,7 @@ #if defined(__FOOCPU__) && defined(__BAROS__) # define malloc_pageshift 12U # define malloc_minsize 16U -#endif /* __FOORCPU__ && __BAROS__ */ +#endif /* __FOOCPU__ && __BAROS__ */ /* @@ -220,10 +220,11 @@ static int malloc_zero; /* junk fill ? */ static int malloc_junk; +#ifdef HAS_UTRACE + /* utrace ? */ static int malloc_utrace; -#ifdef HAS_UTRACE struct ut { void *p; size_t s; void *r; }; void utrace __P((struct ut *, int)); @@ -233,7 +234,7 @@ void utrace __P((struct ut *, int)); {struct ut u; u.p=a; u.s = b; u.r=c; utrace(&u, sizeof u);} #else /* !HAS_UTRACE */ #define UTRACE(a,b,c) -#endif +#endif /* HAS_UTRACE */ /* my last break. */ static void *malloc_brk; @@ -406,8 +407,10 @@ malloc_init () case 'R': malloc_realloc = 1; break; case 'j': malloc_junk = 0; break; case 'J': malloc_junk = 1; break; +#ifdef HAS_UTRACE case 'u': malloc_utrace = 0; break; case 'U': malloc_utrace = 1; break; +#endif case 'v': malloc_sysv = 0; break; case 'V': malloc_sysv = 1; break; case 'x': malloc_xmalloc = 0; break; @@ -433,6 +436,13 @@ malloc_init () if (malloc_zero) malloc_junk=1; + /* + * If we run with junk (or implicitly from above: zero), we want to + * force realloc() to get new storage, so we can DTRT with it. + */ + if (malloc_junk) + malloc_realloc=1; + /* Allocate one page for the page directory */ page_dir = (struct pginfo **) MMAP(malloc_pagesize); @@ -1051,8 +1061,6 @@ malloc(size_t size) { register void *r; - if (malloc_sysv && !size) - return (0); malloc_func = " in malloc():"; THREAD_LOCK(); if (malloc_active++) { @@ -1060,7 +1068,10 @@ malloc(size_t size) malloc_active--; return (0); } - r = imalloc(size); + if (malloc_sysv && !size) + r = 0; + else + r = imalloc(size); UTRACE(0, size, r); malloc_active--; THREAD_UNLOCK(); @@ -1114,28 +1125,3 @@ realloc(void *ptr, size_t size) return (r); } -void * -calloc(size_t num, size_t size) -{ - register void *r; - - size *= num; - if (malloc_sysv && !size) - return (0); - malloc_func = " in calloc():"; - THREAD_LOCK(); - if (malloc_active++) { - wrtwarning("recursive call.\n"); - malloc_active--; - return (0); - } - r = imalloc(size); - UTRACE(0, size, r); - malloc_active--; - THREAD_UNLOCK(); - if (malloc_xmalloc && !r) - wrterror("out of memory.\n"); - if (r) - memset(r, 0, size); - return (r); -} |
