gdb-2.5.1

1 files changed, 0 insertions, 191 deletions

diff --git a/gdb/alloca.c b/gdb/alloca.c
deleted file mode 100644
index cfe98f9..0000000
--- a/gdb/alloca.c
+++ /dev/null
@@ -1,191 +0,0 @@
-/*
-	alloca -- (mostly) portable public-domain implementation -- D A Gwyn
-
-	last edit:	86/05/30	rms
-	   include config.h, since on VMS it renames some symbols.
-	   Use xmalloc instead of malloc.
-
-	This implementation of the PWB library alloca() function,
-	which is used to allocate space off the run-time stack so
-	that it is automatically reclaimed upon procedure exit, 
-	was inspired by discussions with J. Q. Johnson of Cornell.
-
-	It should work under any C implementation that uses an
-	actual procedure stack (as opposed to a linked list of
-	frames).  There are some preprocessor constants that can
-	be defined when compiling for your specific system, for
-	improved efficiency; however, the defaults should be okay.
-
-	The general concept of this implementation is to keep
-	track of all alloca()-allocated blocks, and reclaim any
-	that are found to be deeper in the stack than the current
-	invocation.  This heuristic does not reclaim storage as
-	soon as it becomes invalid, but it will do so eventually.
-
-	As a special case, alloca(0) reclaims storage without
-	allocating any.  It is a good idea to use alloca(0) in
-	your main control loop, etc. to force garbage collection.
-*/
-#ifndef lint
-static char	SCCSid[] = "@(#)alloca.c	1.1";	/* for the "what" utility */
-#endif
-
-#ifdef emacs
-#include "config.h"
-#ifdef static
-/* actually, only want this if static is defined as ""
-   -- this is for usg, in which emacs must undefine static
-   in order to make unexec workable
-   */
-#ifndef STACK_DIRECTION
-you
-lose
--- must know STACK_DIRECTION at compile-time
-#endif /* STACK_DIRECTION undefined */
-#endif static
-#endif emacs
-
-#ifdef X3J11
-typedef void	*pointer;		/* generic pointer type */
-#else
-typedef char	*pointer;		/* generic pointer type */
-#endif
-
-#define	NULL	0			/* null pointer constant */
-
-extern void	free();
-extern pointer	xmalloc();
-
-/*
-	Define STACK_DIRECTION if you know the direction of stack
-	growth for your system; otherwise it will be automatically
-	deduced at run-time.
-
-	STACK_DIRECTION > 0 => grows toward higher addresses
-	STACK_DIRECTION < 0 => grows toward lower addresses
-	STACK_DIRECTION = 0 => direction of growth unknown
-*/
-
-#ifndef STACK_DIRECTION
-#define	STACK_DIRECTION	0		/* direction unknown */
-#endif
-
-#if STACK_DIRECTION != 0
-
-#define	STACK_DIR	STACK_DIRECTION	/* known at compile-time */
-
-#else	/* STACK_DIRECTION == 0; need run-time code */
-
-static int	stack_dir;		/* 1 or -1 once known */
-#define	STACK_DIR	stack_dir
-
-static void
-find_stack_direction (/* void */)
-{
-  static char	*addr = NULL;	/* address of first
-				   `dummy', once known */
-  auto char	dummy;		/* to get stack address */
-
-  if (addr == NULL)
-    {				/* initial entry */
-      addr = &dummy;
-
-      find_stack_direction ();	/* recurse once */
-    }
-  else				/* second entry */
-    if (&dummy > addr)
-      stack_dir = 1;		/* stack grew upward */
-    else
-      stack_dir = -1;		/* stack grew downward */
-}
-
-#endif	/* STACK_DIRECTION == 0 */
-
-/*
-	An "alloca header" is used to:
-	(a) chain together all alloca()ed blocks;
-	(b) keep track of stack depth.
-
-	It is very important that sizeof(header) agree with malloc()
-	alignment chunk size.  The following default should work okay.
-*/
-
-#ifndef	ALIGN_SIZE
-#define	ALIGN_SIZE	sizeof(double)
-#endif
-
-typedef union hdr
-{
-  char	align[ALIGN_SIZE];	/* to force sizeof(header) */
-  struct
-    {
-      union hdr *next;		/* for chaining headers */
-      char *deep;		/* for stack depth measure */
-    } h;
-} header;
-
-/*
-	alloca( size ) returns a pointer to at least `size' bytes of
-	storage which will be automatically reclaimed upon exit from
-	the procedure that called alloca().  Originally, this space
-	was supposed to be taken from the current stack frame of the
-	caller, but that method cannot be made to work for some
-	implementations of C, for example under Gould's UTX/32.
-*/
-
-static header *last_alloca_header = NULL; /* -> last alloca header */
-
-pointer
-alloca (size)			/* returns pointer to storage */
-     unsigned	size;		/* # bytes to allocate */
-{
-  auto char	probe;		/* probes stack depth: */
-  register char	*depth = &probe;
-
-#if STACK_DIRECTION == 0
-  if (STACK_DIR == 0)		/* unknown growth direction */
-    find_stack_direction ();
-#endif
-
-				/* Reclaim garbage, defined as all alloca()ed storage that
-				   was allocated from deeper in the stack than currently. */
-
-  {
-    register header	*hp;	/* traverses linked list */
-
-    for (hp = last_alloca_header; hp != NULL;)
-      if (STACK_DIR > 0 && hp->h.deep > depth
-	  || STACK_DIR < 0 && hp->h.deep < depth)
-	{
-	  register header	*np = hp->h.next;
-
-	  free ((pointer) hp);	/* collect garbage */
-
-	  hp = np;		/* -> next header */
-	}
-      else
-	break;			/* rest are not deeper */
-
-    last_alloca_header = hp;	/* -> last valid storage */
-  }
-
-  if (size == 0)
-    return NULL;		/* no allocation required */
-
-  /* Allocate combined header + user data storage. */
-
-  {
-    register pointer	new = xmalloc (sizeof (header) + size);
-    /* address of header */
-
-    ((header *)new)->h.next = last_alloca_header;
-    ((header *)new)->h.deep = depth;
-
-    last_alloca_header = (header *)new;
-
-    /* User storage begins just after header. */
-
-    return (pointer)((char *)new + sizeof(header));
-  }
-}
-