remove gc

1 files changed, 0 insertions, 379 deletions

diff --git a/gc/include/private/gc_pmark.h b/gc/include/private/gc_pmark.h
deleted file mode 100644
index cf85d4d..0000000
--- a/gc/include/private/gc_pmark.h
+++ /dev/null
@@ -1,379 +0,0 @@
-/*
- * Copyright (c) 1991-1994 by Xerox Corporation.  All rights reserved.
- * Copyright (c) 2001 by Hewlett-Packard Company. All rights reserved.
- *
- * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
- * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
- *
- * Permission is hereby granted to use or copy this program
- * for any purpose,  provided the above notices are retained on all copies.
- * Permission to modify the code and to distribute modified code is granted,
- * provided the above notices are retained, and a notice that the code was
- * modified is included with the above copyright notice.
- *
- */
-
-/* Private declarations of GC marker data structures and macros */
-
-/*
- * Declarations of mark stack.  Needed by marker and client supplied mark
- * routines.  Transitively include gc_priv.h.
- * (Note that gc_priv.h should not be included before this, since this
- * includes dbg_mlc.h, which wants to include gc_priv.h AFTER defining
- * I_HIDE_POINTERS.)
- */
-#ifndef GC_PMARK_H
-# define GC_PMARK_H
-
-# if defined(KEEP_BACK_PTRS) || defined(PRINT_BLACK_LIST)
-#   include "dbg_mlc.h"
-# endif
-# ifndef GC_MARK_H
-#   include "../gc_mark.h"
-# endif
-# ifndef GC_PRIVATE_H
-#   include "gc_priv.h"
-# endif
-
-/* The real declarations of the following is in gc_priv.h, so that	*/
-/* we can avoid scanning the following table.				*/
-/*
-extern mark_proc GC_mark_procs[MAX_MARK_PROCS];
-*/
-
-/*
- * Mark descriptor stuff that should remain private for now, mostly
- * because it's hard to export WORDSZ without including gcconfig.h.
- */
-# define BITMAP_BITS (WORDSZ - GC_DS_TAG_BITS)
-# define PROC(descr) \
-	(GC_mark_procs[((descr) >> GC_DS_TAG_BITS) & (GC_MAX_MARK_PROCS-1)])
-# define ENV(descr) \
-	((descr) >> (GC_DS_TAG_BITS + GC_LOG_MAX_MARK_PROCS))
-# define MAX_ENV \
-  	(((word)1 << (WORDSZ - GC_DS_TAG_BITS - GC_LOG_MAX_MARK_PROCS)) - 1)
-
-
-extern word GC_n_mark_procs;
-
-/* Number of mark stack entries to discard on overflow.	*/
-#define GC_MARK_STACK_DISCARDS (INITIAL_MARK_STACK_SIZE/8)
-
-typedef struct GC_ms_entry {
-    GC_word * mse_start;   /* First word of object */
-    GC_word mse_descr;	/* Descriptor; low order two bits are tags,	*/
-    			/* identifying the upper 30 bits as one of the	*/
-    			/* following:					*/
-} mse;
-
-extern word GC_mark_stack_size;
-
-extern mse * GC_mark_stack_limit;
-
-#ifdef PARALLEL_MARK
-  extern mse * VOLATILE GC_mark_stack_top;
-#else
-  extern mse * GC_mark_stack_top;
-#endif
-
-extern mse * GC_mark_stack;
-
-#ifdef PARALLEL_MARK
-    /*
-     * Allow multiple threads to participate in the marking process.
-     * This works roughly as follows:
-     *  The main mark stack never shrinks, but it can grow.
-     *
-     *	The initiating threads holds the GC lock, and sets GC_help_wanted.
-     *  
-     *  Other threads:
-     *     1) update helper_count (while holding mark_lock.)
-     *	   2) allocate a local mark stack
-     *     repeatedly:
-     *		3) Steal a global mark stack entry by atomically replacing
-     *		   its descriptor with 0.
-     *		4) Copy it to the local stack.
-     *	        5) Mark on the local stack until it is empty, or
-     *		   it may be profitable to copy it back.
-     *	        6) If necessary, copy local stack to global one,
-     *		   holding mark lock.
-     *    7) Stop when the global mark stack is empty.
-     *    8) decrement helper_count (holding mark_lock).
-     *
-     * This is an experiment to see if we can do something along the lines
-     * of the University of Tokyo SGC in a less intrusive, though probably
-     * also less performant, way.
-     */
-    void GC_do_parallel_mark();
-		/* inititate parallel marking.	*/
-
-    extern GC_bool GC_help_wanted;	/* Protected by mark lock	*/
-    extern unsigned GC_helper_count;	/* Number of running helpers.	*/
-					/* Protected by mark lock	*/
-    extern unsigned GC_active_count;	/* Number of active helpers.	*/
-					/* Protected by mark lock	*/
-					/* May increase and decrease	*/
-					/* within each mark cycle.  But	*/
-					/* once it returns to 0, it	*/
-					/* stays zero for the cycle.	*/
-    /* GC_mark_stack_top is also protected by mark lock.	*/
-    extern mse * VOLATILE GC_first_nonempty;
-					/* Lowest entry on mark stack	*/
-					/* that may be nonempty.	*/
-					/* Updated only by initiating 	*/
-					/* thread.			*/
-    /*
-     * GC_notify_all_marker() is used when GC_help_wanted is first set,
-     * when the last helper becomes inactive,
-     * when something is added to the global mark stack, and just after
-     * GC_mark_no is incremented.
-     * This could be split into multiple CVs (and probably should be to
-     * scale to really large numbers of processors.)
-     */
-#endif /* PARALLEL_MARK */
-
-/* Return a pointer to within 1st page of object.  	*/
-/* Set *new_hdr_p to corr. hdr.				*/
-#ifdef __STDC__
-# ifdef PRINT_BLACK_LIST
-    ptr_t GC_find_start(ptr_t current, hdr *hhdr, hdr **new_hdr_p,
-		    	word source);
-# else
-    ptr_t GC_find_start(ptr_t current, hdr *hhdr, hdr **new_hdr_p);
-# endif
-#else
-  ptr_t GC_find_start();
-#endif
-
-mse * GC_signal_mark_stack_overflow GC_PROTO((mse *msp));
-
-# ifdef GATHERSTATS
-#   define ADD_TO_ATOMIC(sz) GC_atomic_in_use += (sz)
-#   define ADD_TO_COMPOSITE(sz) GC_composite_in_use += (sz)
-# else
-#   define ADD_TO_ATOMIC(sz)
-#   define ADD_TO_COMPOSITE(sz)
-# endif
-
-/* Push the object obj with corresponding heap block header hhdr onto 	*/
-/* the mark stack.							*/
-# define PUSH_OBJ(obj, hhdr, mark_stack_top, mark_stack_limit) \
-{ \
-    register word _descr = (hhdr) -> hb_descr; \
-        \
-    if (_descr == 0) { \
-    	ADD_TO_ATOMIC((hhdr) -> hb_sz); \
-    } else { \
-        ADD_TO_COMPOSITE((hhdr) -> hb_sz); \
-        mark_stack_top++; \
-        if (mark_stack_top >= mark_stack_limit) { \
-          mark_stack_top = GC_signal_mark_stack_overflow(mark_stack_top); \
-        } \
-        mark_stack_top -> mse_start = (obj); \
-        mark_stack_top -> mse_descr = _descr; \
-    } \
-}
-
-/* Push the contents of current onto the mark stack if it is a valid	*/
-/* ptr to a currently unmarked object.  Mark it.			*/
-/* If we assumed a standard-conforming compiler, we could probably	*/
-/* generate the exit_label transparently.				*/
-# define PUSH_CONTENTS(current, mark_stack_top, mark_stack_limit, \
-		       source, exit_label) \
-{ \
-    hdr * my_hhdr; \
-    ptr_t my_current = current; \
- \
-    GET_HDR(my_current, my_hhdr); \
-    if (IS_FORWARDING_ADDR_OR_NIL(my_hhdr)) { \
-	 hdr * new_hdr = GC_invalid_header; \
-         my_current = GC_find_start(my_current, my_hhdr, &new_hdr); \
-         my_hhdr = new_hdr; \
-    } \
-    PUSH_CONTENTS_HDR(my_current, mark_stack_top, mark_stack_limit, \
-		  source, exit_label, my_hhdr);	\
-exit_label: ; \
-}
-
-/* As above, but use header cache for header lookup.	*/
-# define HC_PUSH_CONTENTS(current, mark_stack_top, mark_stack_limit, \
-		       source, exit_label) \
-{ \
-    hdr * my_hhdr; \
-    ptr_t my_current = current; \
- \
-    HC_GET_HDR(my_current, my_hhdr, source); \
-    PUSH_CONTENTS_HDR(my_current, mark_stack_top, mark_stack_limit, \
-		  source, exit_label, my_hhdr);	\
-exit_label: ; \
-}
-
-/* Set mark bit, exit if it was already set.	*/
-
-# ifdef USE_MARK_BYTES
-    /* Unlike the mark bit case, there is a race here, and we may set	*/
-    /* the bit twice in the concurrent case.  This can result in the	*/
-    /* object being pushed twice.  But that's only a performance issue.	*/
-#   define SET_MARK_BIT_EXIT_IF_SET(hhdr,displ,exit_label) \
-    { \
-        register VOLATILE char * mark_byte_addr = \
-				hhdr -> hb_marks + ((displ) >> 1); \
-        register char mark_byte = *mark_byte_addr; \
-          \
-	if (mark_byte) goto exit_label; \
-	*mark_byte_addr = 1;  \
-    } 
-# else
-#   define SET_MARK_BIT_EXIT_IF_SET(hhdr,displ,exit_label) \
-    { \
-        register word * mark_word_addr = hhdr -> hb_marks + divWORDSZ(displ); \
-          \
-        OR_WORD_EXIT_IF_SET(mark_word_addr, (word)1 << modWORDSZ(displ), \
-			    exit_label); \
-    } 
-# endif /* USE_MARK_BYTES */
-
-/* If the mark bit corresponding to current is not set, set it, and 	*/
-/* push the contents of the object on the mark stack.  For a small 	*/
-/* object we assume that current is the (possibly interior) pointer	*/
-/* to the object.  For large objects we assume that current points	*/
-/* to somewhere inside the first page of the object.  If		*/
-/* GC_all_interior_pointers is set, it may have been previously 	*/
-/* adjusted to make that true.						*/
-# define PUSH_CONTENTS_HDR(current, mark_stack_top, mark_stack_limit, \
-		           source, exit_label, hhdr) \
-{ \
-    int displ;  /* Displacement in block; first bytes, then words */ \
-    int map_entry; \
-    \
-    displ = HBLKDISPL(current); \
-    map_entry = MAP_ENTRY((hhdr -> hb_map), displ); \
-    displ = BYTES_TO_WORDS(displ); \
-    if (map_entry > CPP_MAX_OFFSET) { \
-	if (map_entry == OFFSET_TOO_BIG) { \
-	  map_entry = displ % (hhdr -> hb_sz); \
-	  displ -= map_entry; \
-	  if (displ + (hhdr -> hb_sz) > BYTES_TO_WORDS(HBLKSIZE)) { \
-	    GC_ADD_TO_BLACK_LIST_NORMAL((word)current, source); \
-	    goto exit_label; \
-	  } \
-	} else { \
-          GC_ADD_TO_BLACK_LIST_NORMAL((word)current, source); goto exit_label; \
-	} \
-    } else { \
-        displ -= map_entry; \
-    } \
-    GC_ASSERT(displ >= 0 && displ < MARK_BITS_PER_HBLK); \
-    SET_MARK_BIT_EXIT_IF_SET(hhdr, displ, exit_label); \
-    GC_STORE_BACK_PTR((ptr_t)source, (ptr_t)HBLKPTR(current) \
-				      + WORDS_TO_BYTES(displ)); \
-    PUSH_OBJ(((word *)(HBLKPTR(current)) + displ), hhdr, \
-    	     mark_stack_top, mark_stack_limit) \
-}
-
-#if defined(PRINT_BLACK_LIST) || defined(KEEP_BACK_PTRS)
-#   define PUSH_ONE_CHECKED_STACK(p, source) \
-	GC_mark_and_push_stack(p, (ptr_t)(source))
-#else
-#   define PUSH_ONE_CHECKED_STACK(p, source) \
-	GC_mark_and_push_stack(p)
-#endif
-
-/*
- * Push a single value onto mark stack. Mark from the object pointed to by p.
- * P is considered valid even if it is an interior pointer.
- * Previously marked objects are not pushed.  Hence we make progress even
- * if the mark stack overflows.
- */
-# define GC_PUSH_ONE_STACK(p, source) \
-    if ((ptr_t)(p) >= (ptr_t)GC_least_plausible_heap_addr 	\
-	 && (ptr_t)(p) < (ptr_t)GC_greatest_plausible_heap_addr) {	\
-	 PUSH_ONE_CHECKED_STACK(p, source);	\
-    }
-
-/*
- * As above, but interior pointer recognition as for
- * normal for heap pointers.
- */
-# define GC_PUSH_ONE_HEAP(p,source) \
-    if ((ptr_t)(p) >= (ptr_t)GC_least_plausible_heap_addr 	\
-	 && (ptr_t)(p) < (ptr_t)GC_greatest_plausible_heap_addr) {	\
-	    GC_mark_stack_top = GC_mark_and_push( \
-			    (GC_PTR)(p), GC_mark_stack_top, \
-			    GC_mark_stack_limit, (GC_PTR *)(source)); \
-    }
-
-/* Mark starting at mark stack entry top (incl.) down to	*/
-/* mark stack entry bottom (incl.).  Stop after performing	*/
-/* about one page worth of work.  Return the new mark stack	*/
-/* top entry.							*/
-mse * GC_mark_from GC_PROTO((mse * top, mse * bottom, mse *limit));
-
-#define MARK_FROM_MARK_STACK() \
-	GC_mark_stack_top = GC_mark_from(GC_mark_stack_top, \
-					 GC_mark_stack, \
-					 GC_mark_stack + GC_mark_stack_size);
-
-/*
- * Mark from one finalizable object using the specified
- * mark proc. May not mark the object pointed to by 
- * real_ptr. That is the job of the caller, if appropriate
- */
-# define GC_MARK_FO(real_ptr, mark_proc) \
-{ \
-    (*(mark_proc))(real_ptr); \
-    while (!GC_mark_stack_empty()) MARK_FROM_MARK_STACK(); \
-    if (GC_mark_state != MS_NONE) { \
-        GC_set_mark_bit(real_ptr); \
-        while (!GC_mark_some((ptr_t)0)) {} \
-    } \
-}
-
-extern GC_bool GC_mark_stack_too_small;
-				/* We need a larger mark stack.  May be	*/
-				/* set by client supplied mark routines.*/
-
-typedef int mark_state_t;	/* Current state of marking, as follows:*/
-				/* Used to remember where we are during */
-				/* concurrent marking.			*/
-
-				/* We say something is dirty if it was	*/
-				/* written since the last time we	*/
-				/* retrieved dirty bits.  We say it's 	*/
-				/* grungy if it was marked dirty in the	*/
-				/* last set of bits we retrieved.	*/
-				
-				/* Invariant I: all roots and marked	*/
-				/* objects p are either dirty, or point */
-				/* to objects q that are either marked 	*/
-				/* or a pointer to q appears in a range	*/
-				/* on the mark stack.			*/
-
-# define MS_NONE 0		/* No marking in progress. I holds.	*/
-				/* Mark stack is empty.			*/
-
-# define MS_PUSH_RESCUERS 1	/* Rescuing objects are currently 	*/
-				/* being pushed.  I holds, except	*/
-				/* that grungy roots may point to 	*/
-				/* unmarked objects, as may marked	*/
-				/* grungy objects above scan_ptr.	*/
-
-# define MS_PUSH_UNCOLLECTABLE 2
-				/* I holds, except that marked 		*/
-				/* uncollectable objects above scan_ptr */
-				/* may point to unmarked objects.	*/
-				/* Roots may point to unmarked objects	*/
-
-# define MS_ROOTS_PUSHED 3	/* I holds, mark stack may be nonempty  */
-
-# define MS_PARTIALLY_INVALID 4	/* I may not hold, e.g. because of M.S. */
-				/* overflow.  However marked heap	*/
-				/* objects below scan_ptr point to	*/
-				/* marked or stacked objects.		*/
-
-# define MS_INVALID 5		/* I may not hold.			*/
-
-extern mark_state_t GC_mark_state;
-
-#endif  /* GC_PMARK_H */
-