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ALLOCA(3) FreeBSD Library Functions Manual ALLOCA(3) NAME alloca -- memory allocator LIBRARY Standard C Library (libc, -lc) SYNOPSIS #include <stdlib.h> void * alloca(size_t size); DESCRIPTION The alloca() function allocates size bytes of space in the stack frame of the caller. This temporary space is automatically freed on return. RETURN VALUES The alloca() function returns a pointer to the beginning of the allocated space. SEE ALSO brk(2), calloc(3), getpagesize(3), malloc(3), realloc(3) HISTORY The alloca() function appeared in Version 32V AT&T UNIX. BUGS The alloca() function is machine and compiler dependent; its use is dis- couraged. The 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 alloca() cannot determine such an er- ror. Avoid alloca() with large unbounded allocations. FreeBSD 13.0 September 5, 2006 FreeBSD 13.0
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | SEE ALSO | HISTORY | BUGS
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