Copyright (c) 1980, 1991, 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. 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.
@(#)alloca.3 8.1 (Berkeley) 6/4/93
$FreeBSD: releng/10.2/lib/libc/stdlib/alloca.3 251069 2013-05-28 20:57:40Z emaste $
.Dd September 5, 2006 .Dt ALLOCA 3 .Os .Sh NAME .Nm alloca .Nd memory allocator .Sh LIBRARY .Lb libc .Sh SYNOPSIS n stdlib.h .Ft void * .Fn alloca "size_t size" .Sh DESCRIPTION The .Fn alloca function allocates .Fa size bytes of space in the stack frame of the caller. This temporary space is automatically freed on return. .Sh RETURN VALUES The .Fn alloca function returns a pointer to the beginning of the allocated space. .Sh SEE ALSO .Xr brk 2 , .Xr calloc 3 , .Xr getpagesize 3 , .Xr malloc 3 , .Xr realloc 3 .Sh HISTORY The .Fn alloca function appeared in .At 32v . .Bx ?? .
The function appeared in 32v, pwb and pwb.2 and in 3bsd 4bsd
The first man page (or link to a man page that I can find at the
moment is 4.3...
.Sh BUGS The .Fn alloca function is machine and compiler dependent; its use is discouraged.
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. 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.
@(#)alloca.3 8.1 (Berkeley) 6/4/93
$FreeBSD: releng/10.2/lib/libc/stdlib/alloca.3 251069 2013-05-28 20:57:40Z emaste $
.Dd September 5, 2006 .Dt ALLOCA 3 .Os .Sh NAME .Nm alloca .Nd memory allocator .Sh LIBRARY .Lb libc .Sh SYNOPSIS n stdlib.h .Ft void * .Fn alloca "size_t size" .Sh DESCRIPTION The .Fn alloca function allocates .Fa size bytes of space in the stack frame of the caller. This temporary space is automatically freed on return. .Sh RETURN VALUES The .Fn alloca function returns a pointer to the beginning of the allocated space. .Sh SEE ALSO .Xr brk 2 , .Xr calloc 3 , .Xr getpagesize 3 , .Xr malloc 3 , .Xr realloc 3 .Sh HISTORY The .Fn alloca function appeared in .At 32v . .Bx ?? .
The function appeared in 32v, pwb and pwb.2 and in 3bsd 4bsd
The first man page (or link to a man page that I can find at the
moment is 4.3...
.Sh BUGS The .Fn alloca function is machine and compiler dependent; its use is discouraged.
p The .Fn alloca function is slightly unsafe because it cannot ensure that the pointer returned points to a valid and usable block of memory. The allocation made may exceed the bounds of the stack, or even go further into other objects in memory, and .Fn alloca cannot determine such an error. Avoid .Fn alloca with large unbounded allocations.