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jlechner |
/*
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* Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
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* Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
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* Copyright (c) 1996-1999 by Silicon Graphics. All rights reserved.
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* Copyright (c) 1999-2001 by Hewlett-Packard Company. All rights reserved.
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*
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*
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* THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
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* OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
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*
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* Permission is hereby granted to use or copy this program
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* for any purpose, provided the above notices are retained on all copies.
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* Permission to modify the code and to distribute modified code is granted,
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* provided the above notices are retained, and a notice that the code was
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* modified is included with the above copyright notice.
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*/
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# ifndef GC_PRIVATE_H
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# define GC_PRIVATE_H
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/* Autoconf definitions. */
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/* FIXME: This should really be included directly from each .c file. */
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#include <gc_config.h>
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#if defined(mips) && defined(SYSTYPE_BSD) && defined(sony_news)
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/* sony RISC NEWS, NEWSOS 4 */
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# define BSD_TIME
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/* typedef long ptrdiff_t; -- necessary on some really old systems */
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#endif
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#if defined(mips) && defined(SYSTYPE_BSD43)
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/* MIPS RISCOS 4 */
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# define BSD_TIME
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#endif
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#ifdef DGUX
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# include <sys/types.h>
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# include <sys/time.h>
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# include <sys/resource.h>
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#endif /* DGUX */
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#ifdef BSD_TIME
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# include <sys/types.h>
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# include <sys/time.h>
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# include <sys/resource.h>
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#endif /* BSD_TIME */
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# ifndef _GC_H
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# include "../gc.h"
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# endif
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# ifndef GC_MARK_H
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# include "../gc_mark.h"
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# endif
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typedef GC_word word;
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typedef GC_signed_word signed_word;
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typedef int GC_bool;
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# define TRUE 1
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# define FALSE 0
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typedef char * ptr_t; /* A generic pointer to which we can add */
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/* byte displacements. */
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/* Preferably identical to caddr_t, if it */
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/* exists. */
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# ifndef GCCONFIG_H
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# include "gcconfig.h"
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# endif
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# ifndef HEADERS_H
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# include "gc_hdrs.h"
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# endif
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#if defined(__STDC__)
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# include <stdlib.h>
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# if !(defined( sony_news ) )
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# include <stddef.h>
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# endif
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# define VOLATILE volatile
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#else
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# ifdef MSWIN32
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# include <stdlib.h>
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# endif
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# define VOLATILE
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#endif
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#if 0 /* defined(__GNUC__) doesn't work yet */
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# define EXPECT(expr, outcome) __builtin_expect(expr,outcome)
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/* Equivalent to (expr), but predict that usually (expr)==outcome. */
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#else
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# define EXPECT(expr, outcome) (expr)
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#endif /* __GNUC__ */
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# ifndef GC_LOCKS_H
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# include "gc_locks.h"
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# endif
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# ifdef STACK_GROWS_DOWN
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# define COOLER_THAN >
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# define HOTTER_THAN <
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# define MAKE_COOLER(x,y) if ((word)(x)+(y) > (word)(x)) {(x) += (y);} \
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else {(x) = (word)ONES;}
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# define MAKE_HOTTER(x,y) (x) -= (y)
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# else
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# define COOLER_THAN <
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# define HOTTER_THAN >
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# define MAKE_COOLER(x,y) if ((word)(x)-(y) < (word)(x)) {(x) -= (y);} else {(x) = 0;}
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# define MAKE_HOTTER(x,y) (x) += (y)
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# endif
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#if defined(AMIGA) && defined(__SASC)
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# define GC_FAR __far
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#else
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# define GC_FAR
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#endif
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/*********************************/
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/* */
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/* Definitions for conservative */
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/* collector */
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/* */
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/*********************************/
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/*********************************/
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/* */
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/* Easily changeable parameters */
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/* */
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/*********************************/
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/* #define STUBBORN_ALLOC */
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/* Enable stubborm allocation, and thus a limited */
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/* form of incremental collection w/o dirty bits. */
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/* #define ALL_INTERIOR_POINTERS */
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/* Forces all pointers into the interior of an */
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/* object to be considered valid. Also causes the */
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/* sizes of all objects to be inflated by at least */
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/* one byte. This should suffice to guarantee */
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/* that in the presence of a compiler that does */
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/* not perform garbage-collector-unsafe */
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/* optimizations, all portable, strictly ANSI */
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/* conforming C programs should be safely usable */
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/* with malloc replaced by GC_malloc and free */
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/* calls removed. There are several disadvantages: */
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/* 1. There are probably no interesting, portable, */
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/* strictly ANSI conforming C programs. */
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/* 2. This option makes it hard for the collector */
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/* to allocate space that is not ``pointed to'' */
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/* by integers, etc. Under SunOS 4.X with a */
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/* statically linked libc, we empiricaly */
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/* observed that it would be difficult to */
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/* allocate individual objects larger than 100K. */
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/* Even if only smaller objects are allocated, */
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/* more swap space is likely to be needed. */
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/* Fortunately, much of this will never be */
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/* touched. */
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/* If you can easily avoid using this option, do. */
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/* If not, try to keep individual objects small. */
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/* This is now really controlled at startup, */
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/* through GC_all_interior_pointers. */
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#define PRINTSTATS /* Print garbage collection statistics */
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/* For less verbose output, undefine in reclaim.c */
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#define PRINTTIMES /* Print the amount of time consumed by each garbage */
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/* collection. */
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#define PRINTBLOCKS /* Print object sizes associated with heap blocks, */
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/* whether the objects are atomic or composite, and */
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/* whether or not the block was found to be empty */
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/* during the reclaim phase. Typically generates */
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/* about one screenful per garbage collection. */
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#undef PRINTBLOCKS
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#ifdef SILENT
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# ifdef PRINTSTATS
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# undef PRINTSTATS
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# endif
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# ifdef PRINTTIMES
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# undef PRINTTIMES
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# endif
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# ifdef PRINTNBLOCKS
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# undef PRINTNBLOCKS
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# endif
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#endif
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#if defined(PRINTSTATS) && !defined(GATHERSTATS)
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# define GATHERSTATS
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#endif
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#if defined(PRINTSTATS) || !defined(SMALL_CONFIG)
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# define CONDPRINT /* Print some things if GC_print_stats is set */
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#endif
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#define GC_INVOKE_FINALIZERS() GC_notify_or_invoke_finalizers()
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#define MERGE_SIZES /* Round up some object sizes, so that fewer distinct */
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/* free lists are actually maintained. This applies */
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/* only to the top level routines in misc.c, not to */
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/* user generated code that calls GC_allocobj and */
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/* GC_allocaobj directly. */
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/* Slows down average programs slightly. May however */
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/* substantially reduce fragmentation if allocation */
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/* request sizes are widely scattered. */
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/* May save significant amounts of space for obj_map */
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/* entries. */
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#if defined(USE_MARK_BYTES) && !defined(ALIGN_DOUBLE)
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# define ALIGN_DOUBLE
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/* We use one byte for every 2 words, which doesn't allow for */
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/* odd numbered words to have mark bits. */
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#endif
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#if defined(GC_GCJ_SUPPORT) && ALIGNMENT < 8 && !defined(ALIGN_DOUBLE)
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/* GCJ's Hashtable synchronization code requires 64-bit alignment. */
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# define ALIGN_DOUBLE
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#endif
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/* ALIGN_DOUBLE requires MERGE_SIZES at present. */
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# if defined(ALIGN_DOUBLE) && !defined(MERGE_SIZES)
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# define MERGE_SIZES
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# endif
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#if !defined(DONT_ADD_BYTE_AT_END)
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# define EXTRA_BYTES GC_all_interior_pointers
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#else
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# define EXTRA_BYTES 0
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#endif
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# ifndef LARGE_CONFIG
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# define MINHINCR 16 /* Minimum heap increment, in blocks of HBLKSIZE */
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/* Must be multiple of largest page size. */
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# define MAXHINCR 2048 /* Maximum heap increment, in blocks */
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# else
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# define MINHINCR 64
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# define MAXHINCR 4096
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# endif
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# define TIME_LIMIT 50 /* We try to keep pause times from exceeding */
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/* this by much. In milliseconds. */
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# define BL_LIMIT GC_black_list_spacing
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/* If we need a block of N bytes, and we have */
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/* a block of N + BL_LIMIT bytes available, */
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/* and N > BL_LIMIT, */
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/* but all possible positions in it are */
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/* blacklisted, we just use it anyway (and */
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/* print a warning, if warnings are enabled). */
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/* This risks subsequently leaking the block */
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/* due to a false reference. But not using */
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/* the block risks unreasonable immediate */
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/* heap growth. */
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/*********************************/
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/* */
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/* Stack saving for debugging */
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/* */
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/*********************************/
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#ifdef SAVE_CALL_CHAIN
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/* Fill in the pc and argument information for up to NFRAMES of my */
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/* callers. Ignore my frame and my callers frame. */
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struct callinfo;
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void GC_save_callers GC_PROTO((struct callinfo info[NFRAMES]));
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void GC_print_callers GC_PROTO((struct callinfo info[NFRAMES]));
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#endif
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| 275 |
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| 276 |
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#ifdef NEED_CALLINFO
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struct callinfo {
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word ci_pc; /* Caller, not callee, pc */
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# if NARGS > 0
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word ci_arg[NARGS]; /* bit-wise complement to avoid retention */
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# endif
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| 282 |
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# if defined(ALIGN_DOUBLE) && (NFRAMES * (NARGS + 1)) % 2 == 1
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| 283 |
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/* Likely alignment problem. */
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word ci_dummy;
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| 285 |
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# endif
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| 286 |
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};
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| 287 |
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#endif
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| 288 |
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/*********************************/
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| 291 |
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/* */
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| 292 |
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/* OS interface routines */
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| 293 |
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/* */
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| 294 |
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/*********************************/
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| 295 |
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| 296 |
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#ifdef BSD_TIME
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| 297 |
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# undef CLOCK_TYPE
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| 298 |
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# undef GET_TIME
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| 299 |
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# undef MS_TIME_DIFF
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| 300 |
|
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# define CLOCK_TYPE struct timeval
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| 301 |
|
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# define GET_TIME(x) { struct rusage rusage; \
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| 302 |
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getrusage (RUSAGE_SELF, &rusage); \
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| 303 |
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x = rusage.ru_utime; }
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| 304 |
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# define MS_TIME_DIFF(a,b) ((double) (a.tv_sec - b.tv_sec) * 1000.0 \
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| 305 |
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+ (double) (a.tv_usec - b.tv_usec) / 1000.0)
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| 306 |
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#else /* !BSD_TIME */
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| 307 |
|
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# if defined(MSWIN32) || defined(MSWINCE)
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| 308 |
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# include <windows.h>
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| 309 |
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# include <winbase.h>
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| 310 |
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# define CLOCK_TYPE DWORD
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| 311 |
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# define GET_TIME(x) x = GetTickCount()
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| 312 |
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# define MS_TIME_DIFF(a,b) ((long)((a)-(b)))
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| 313 |
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# else /* !MSWIN32, !MSWINCE, !BSD_TIME */
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| 314 |
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# include <time.h>
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| 315 |
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# if !defined(__STDC__) && defined(SPARC) && defined(SUNOS4)
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| 316 |
|
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clock_t clock(); /* Not in time.h, where it belongs */
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| 317 |
|
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# endif
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| 318 |
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# if defined(FREEBSD) && !defined(CLOCKS_PER_SEC)
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| 319 |
|
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# include <machine/limits.h>
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| 320 |
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# define CLOCKS_PER_SEC CLK_TCK
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| 321 |
|
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# endif
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| 322 |
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# if !defined(CLOCKS_PER_SEC)
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| 323 |
|
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# define CLOCKS_PER_SEC 1000000
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| 324 |
|
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/*
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| 325 |
|
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* This is technically a bug in the implementation. ANSI requires that
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| 326 |
|
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* CLOCKS_PER_SEC be defined. But at least under SunOS4.1.1, it isn't.
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| 327 |
|
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* Also note that the combination of ANSI C and POSIX is incredibly gross
|
| 328 |
|
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* here. The type clock_t is used by both clock() and times(). But on
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| 329 |
|
|
* some machines these use different notions of a clock tick, CLOCKS_PER_SEC
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| 330 |
|
|
* seems to apply only to clock. Hence we use it here. On many machines,
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| 331 |
|
|
* including SunOS, clock actually uses units of microseconds (which are
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| 332 |
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* not really clock ticks).
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| 333 |
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*/
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| 334 |
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# endif
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| 335 |
|
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# define CLOCK_TYPE clock_t
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| 336 |
|
|
# define GET_TIME(x) x = clock()
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| 337 |
|
|
# define MS_TIME_DIFF(a,b) ((unsigned long) \
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| 338 |
|
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(1000.0*(double)((a)-(b))/(double)CLOCKS_PER_SEC))
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| 339 |
|
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# endif /* !MSWIN32 */
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| 340 |
|
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#endif /* !BSD_TIME */
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| 341 |
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| 342 |
|
|
/* We use bzero and bcopy internally. They may not be available. */
|
| 343 |
|
|
# if defined(SPARC) && defined(SUNOS4)
|
| 344 |
|
|
# define BCOPY_EXISTS
|
| 345 |
|
|
# endif
|
| 346 |
|
|
# if defined(M68K) && defined(AMIGA)
|
| 347 |
|
|
# define BCOPY_EXISTS
|
| 348 |
|
|
# endif
|
| 349 |
|
|
# if defined(M68K) && defined(NEXT)
|
| 350 |
|
|
# define BCOPY_EXISTS
|
| 351 |
|
|
# endif
|
| 352 |
|
|
# if defined(VAX)
|
| 353 |
|
|
# define BCOPY_EXISTS
|
| 354 |
|
|
# endif
|
| 355 |
|
|
# if defined(AMIGA)
|
| 356 |
|
|
# include <string.h>
|
| 357 |
|
|
# define BCOPY_EXISTS
|
| 358 |
|
|
# endif
|
| 359 |
|
|
# if defined(DARWIN)
|
| 360 |
|
|
# include <string.h>
|
| 361 |
|
|
# define BCOPY_EXISTS
|
| 362 |
|
|
# endif
|
| 363 |
|
|
|
| 364 |
|
|
# ifndef BCOPY_EXISTS
|
| 365 |
|
|
# include <string.h>
|
| 366 |
|
|
# define BCOPY(x,y,n) memcpy(y, x, (size_t)(n))
|
| 367 |
|
|
# define BZERO(x,n) memset(x, 0, (size_t)(n))
|
| 368 |
|
|
# else
|
| 369 |
|
|
# define BCOPY(x,y,n) bcopy((char *)(x),(char *)(y),(int)(n))
|
| 370 |
|
|
# define BZERO(x,n) bzero((char *)(x),(int)(n))
|
| 371 |
|
|
# endif
|
| 372 |
|
|
|
| 373 |
|
|
/* Delay any interrupts or signals that may abort this thread. Data */
|
| 374 |
|
|
/* structures are in a consistent state outside this pair of calls. */
|
| 375 |
|
|
/* ANSI C allows both to be empty (though the standard isn't very */
|
| 376 |
|
|
/* clear on that point). Standard malloc implementations are usually */
|
| 377 |
|
|
/* neither interruptable nor thread-safe, and thus correspond to */
|
| 378 |
|
|
/* empty definitions. */
|
| 379 |
|
|
/* It probably doesn't make any sense to declare these to be nonempty */
|
| 380 |
|
|
/* if the code is being optimized, since signal safety relies on some */
|
| 381 |
|
|
/* ordering constraints that are typically not obeyed by optimizing */
|
| 382 |
|
|
/* compilers. */
|
| 383 |
|
|
# ifdef PCR
|
| 384 |
|
|
# define DISABLE_SIGNALS() \
|
| 385 |
|
|
PCR_Th_SetSigMask(PCR_allSigsBlocked,&GC_old_sig_mask)
|
| 386 |
|
|
# define ENABLE_SIGNALS() \
|
| 387 |
|
|
PCR_Th_SetSigMask(&GC_old_sig_mask, NIL)
|
| 388 |
|
|
# else
|
| 389 |
|
|
# if defined(THREADS) || defined(AMIGA) \
|
| 390 |
|
|
|| defined(MSWIN32) || defined(MSWINCE) || defined(MACOS) \
|
| 391 |
|
|
|| defined(DJGPP) || defined(NO_SIGNALS)
|
| 392 |
|
|
/* Also useful for debugging. */
|
| 393 |
|
|
/* Should probably use thr_sigsetmask for GC_SOLARIS_THREADS. */
|
| 394 |
|
|
# define DISABLE_SIGNALS()
|
| 395 |
|
|
# define ENABLE_SIGNALS()
|
| 396 |
|
|
# else
|
| 397 |
|
|
# define DISABLE_SIGNALS() GC_disable_signals()
|
| 398 |
|
|
void GC_disable_signals();
|
| 399 |
|
|
# define ENABLE_SIGNALS() GC_enable_signals()
|
| 400 |
|
|
void GC_enable_signals();
|
| 401 |
|
|
# endif
|
| 402 |
|
|
# endif
|
| 403 |
|
|
|
| 404 |
|
|
/*
|
| 405 |
|
|
* Stop and restart mutator threads.
|
| 406 |
|
|
*/
|
| 407 |
|
|
# ifdef PCR
|
| 408 |
|
|
# include "th/PCR_ThCtl.h"
|
| 409 |
|
|
# define STOP_WORLD() \
|
| 410 |
|
|
PCR_ThCtl_SetExclusiveMode(PCR_ThCtl_ExclusiveMode_stopNormal, \
|
| 411 |
|
|
PCR_allSigsBlocked, \
|
| 412 |
|
|
PCR_waitForever)
|
| 413 |
|
|
# define START_WORLD() \
|
| 414 |
|
|
PCR_ThCtl_SetExclusiveMode(PCR_ThCtl_ExclusiveMode_null, \
|
| 415 |
|
|
PCR_allSigsBlocked, \
|
| 416 |
|
|
PCR_waitForever);
|
| 417 |
|
|
# else
|
| 418 |
|
|
# if defined(GC_SOLARIS_THREADS) || defined(GC_WIN32_THREADS) \
|
| 419 |
|
|
|| defined(GC_PTHREADS)
|
| 420 |
|
|
void GC_stop_world();
|
| 421 |
|
|
void GC_start_world();
|
| 422 |
|
|
# define STOP_WORLD() GC_stop_world()
|
| 423 |
|
|
# define START_WORLD() GC_start_world()
|
| 424 |
|
|
# else
|
| 425 |
|
|
# define STOP_WORLD()
|
| 426 |
|
|
# define START_WORLD()
|
| 427 |
|
|
# endif
|
| 428 |
|
|
# endif
|
| 429 |
|
|
|
| 430 |
|
|
/* Abandon ship */
|
| 431 |
|
|
# ifdef PCR
|
| 432 |
|
|
# define ABORT(s) PCR_Base_Panic(s)
|
| 433 |
|
|
# else
|
| 434 |
|
|
# ifdef SMALL_CONFIG
|
| 435 |
|
|
# define ABORT(msg) abort();
|
| 436 |
|
|
# else
|
| 437 |
|
|
GC_API void GC_abort GC_PROTO((GC_CONST char * msg));
|
| 438 |
|
|
# define ABORT(msg) GC_abort(msg);
|
| 439 |
|
|
# endif
|
| 440 |
|
|
# endif
|
| 441 |
|
|
|
| 442 |
|
|
/* Exit abnormally, but without making a mess (e.g. out of memory) */
|
| 443 |
|
|
# ifdef PCR
|
| 444 |
|
|
# define EXIT() PCR_Base_Exit(1,PCR_waitForever)
|
| 445 |
|
|
# else
|
| 446 |
|
|
# define EXIT() (void)exit(1)
|
| 447 |
|
|
# endif
|
| 448 |
|
|
|
| 449 |
|
|
/* Print warning message, e.g. almost out of memory. */
|
| 450 |
|
|
# define WARN(msg,arg) (*GC_current_warn_proc)("GC Warning: " msg, (GC_word)(arg))
|
| 451 |
|
|
extern GC_warn_proc GC_current_warn_proc;
|
| 452 |
|
|
|
| 453 |
|
|
/* Get environment entry */
|
| 454 |
|
|
#if !defined(NO_GETENV)
|
| 455 |
|
|
# if defined(EMPTY_GETENV_RESULTS)
|
| 456 |
|
|
/* Workaround for a reputed Wine bug. */
|
| 457 |
|
|
static inline char * fixed_getenv(const char *name)
|
| 458 |
|
|
{
|
| 459 |
|
|
char * tmp = getenv(name);
|
| 460 |
|
|
if (tmp == 0 || strlen(tmp) == 0)
|
| 461 |
|
|
return 0;
|
| 462 |
|
|
return tmp;
|
| 463 |
|
|
}
|
| 464 |
|
|
# define GETENV(name) fixed_getenv(name)
|
| 465 |
|
|
# else
|
| 466 |
|
|
# define GETENV(name) getenv(name)
|
| 467 |
|
|
# endif
|
| 468 |
|
|
#else
|
| 469 |
|
|
# define GETENV(name) 0
|
| 470 |
|
|
#endif
|
| 471 |
|
|
|
| 472 |
|
|
/*********************************/
|
| 473 |
|
|
/* */
|
| 474 |
|
|
/* Word-size-dependent defines */
|
| 475 |
|
|
/* */
|
| 476 |
|
|
/*********************************/
|
| 477 |
|
|
|
| 478 |
|
|
#if CPP_WORDSZ == 32
|
| 479 |
|
|
# define WORDS_TO_BYTES(x) ((x)<<2)
|
| 480 |
|
|
# define BYTES_TO_WORDS(x) ((x)>>2)
|
| 481 |
|
|
# define LOGWL ((word)5) /* log[2] of CPP_WORDSZ */
|
| 482 |
|
|
# define modWORDSZ(n) ((n) & 0x1f) /* n mod size of word */
|
| 483 |
|
|
# if ALIGNMENT != 4
|
| 484 |
|
|
# define UNALIGNED
|
| 485 |
|
|
# endif
|
| 486 |
|
|
#endif
|
| 487 |
|
|
|
| 488 |
|
|
#if CPP_WORDSZ == 64
|
| 489 |
|
|
# define WORDS_TO_BYTES(x) ((x)<<3)
|
| 490 |
|
|
# define BYTES_TO_WORDS(x) ((x)>>3)
|
| 491 |
|
|
# define LOGWL ((word)6) /* log[2] of CPP_WORDSZ */
|
| 492 |
|
|
# define modWORDSZ(n) ((n) & 0x3f) /* n mod size of word */
|
| 493 |
|
|
# if ALIGNMENT != 8
|
| 494 |
|
|
# define UNALIGNED
|
| 495 |
|
|
# endif
|
| 496 |
|
|
#endif
|
| 497 |
|
|
|
| 498 |
|
|
#define WORDSZ ((word)CPP_WORDSZ)
|
| 499 |
|
|
#define SIGNB ((word)1 << (WORDSZ-1))
|
| 500 |
|
|
#define BYTES_PER_WORD ((word)(sizeof (word)))
|
| 501 |
|
|
#define ONES ((word)(signed_word)(-1))
|
| 502 |
|
|
#define divWORDSZ(n) ((n) >> LOGWL) /* divide n by size of word */
|
| 503 |
|
|
|
| 504 |
|
|
/*********************/
|
| 505 |
|
|
/* */
|
| 506 |
|
|
/* Size Parameters */
|
| 507 |
|
|
/* */
|
| 508 |
|
|
/*********************/
|
| 509 |
|
|
|
| 510 |
|
|
/* heap block size, bytes. Should be power of 2 */
|
| 511 |
|
|
|
| 512 |
|
|
#ifndef HBLKSIZE
|
| 513 |
|
|
# ifdef SMALL_CONFIG
|
| 514 |
|
|
# define CPP_LOG_HBLKSIZE 10
|
| 515 |
|
|
# else
|
| 516 |
|
|
# if (CPP_WORDSZ == 32) || (defined(HPUX) && defined(HP_PA))
|
| 517 |
|
|
/* HPUX/PA seems to use 4K pages with the 64 bit ABI */
|
| 518 |
|
|
# define CPP_LOG_HBLKSIZE 12
|
| 519 |
|
|
# else
|
| 520 |
|
|
# define CPP_LOG_HBLKSIZE 13
|
| 521 |
|
|
# endif
|
| 522 |
|
|
# endif
|
| 523 |
|
|
#else
|
| 524 |
|
|
# if HBLKSIZE == 512
|
| 525 |
|
|
# define CPP_LOG_HBLKSIZE 9
|
| 526 |
|
|
# endif
|
| 527 |
|
|
# if HBLKSIZE == 1024
|
| 528 |
|
|
# define CPP_LOG_HBLKSIZE 10
|
| 529 |
|
|
# endif
|
| 530 |
|
|
# if HBLKSIZE == 2048
|
| 531 |
|
|
# define CPP_LOG_HBLKSIZE 11
|
| 532 |
|
|
# endif
|
| 533 |
|
|
# if HBLKSIZE == 4096
|
| 534 |
|
|
# define CPP_LOG_HBLKSIZE 12
|
| 535 |
|
|
# endif
|
| 536 |
|
|
# if HBLKSIZE == 8192
|
| 537 |
|
|
# define CPP_LOG_HBLKSIZE 13
|
| 538 |
|
|
# endif
|
| 539 |
|
|
# if HBLKSIZE == 16384
|
| 540 |
|
|
# define CPP_LOG_HBLKSIZE 14
|
| 541 |
|
|
# endif
|
| 542 |
|
|
# ifndef CPP_LOG_HBLKSIZE
|
| 543 |
|
|
--> fix HBLKSIZE
|
| 544 |
|
|
# endif
|
| 545 |
|
|
# undef HBLKSIZE
|
| 546 |
|
|
#endif
|
| 547 |
|
|
# define CPP_HBLKSIZE (1 << CPP_LOG_HBLKSIZE)
|
| 548 |
|
|
# define LOG_HBLKSIZE ((word)CPP_LOG_HBLKSIZE)
|
| 549 |
|
|
# define HBLKSIZE ((word)CPP_HBLKSIZE)
|
| 550 |
|
|
|
| 551 |
|
|
|
| 552 |
|
|
/* max size objects supported by freelist (larger objects may be */
|
| 553 |
|
|
/* allocated, but less efficiently) */
|
| 554 |
|
|
|
| 555 |
|
|
#define CPP_MAXOBJBYTES (CPP_HBLKSIZE/2)
|
| 556 |
|
|
#define MAXOBJBYTES ((word)CPP_MAXOBJBYTES)
|
| 557 |
|
|
#define CPP_MAXOBJSZ BYTES_TO_WORDS(CPP_MAXOBJBYTES)
|
| 558 |
|
|
#define MAXOBJSZ ((word)CPP_MAXOBJSZ)
|
| 559 |
|
|
|
| 560 |
|
|
# define divHBLKSZ(n) ((n) >> LOG_HBLKSIZE)
|
| 561 |
|
|
|
| 562 |
|
|
# define HBLK_PTR_DIFF(p,q) divHBLKSZ((ptr_t)p - (ptr_t)q)
|
| 563 |
|
|
/* Equivalent to subtracting 2 hblk pointers. */
|
| 564 |
|
|
/* We do it this way because a compiler should */
|
| 565 |
|
|
/* find it hard to use an integer division */
|
| 566 |
|
|
/* instead of a shift. The bundled SunOS 4.1 */
|
| 567 |
|
|
/* o.w. sometimes pessimizes the subtraction to */
|
| 568 |
|
|
/* involve a call to .div. */
|
| 569 |
|
|
|
| 570 |
|
|
# define modHBLKSZ(n) ((n) & (HBLKSIZE-1))
|
| 571 |
|
|
|
| 572 |
|
|
# define HBLKPTR(objptr) ((struct hblk *)(((word) (objptr)) & ~(HBLKSIZE-1)))
|
| 573 |
|
|
|
| 574 |
|
|
# define HBLKDISPL(objptr) (((word) (objptr)) & (HBLKSIZE-1))
|
| 575 |
|
|
|
| 576 |
|
|
/* Round up byte allocation requests to integral number of words, etc. */
|
| 577 |
|
|
# define ROUNDED_UP_WORDS(n) \
|
| 578 |
|
|
BYTES_TO_WORDS((n) + (WORDS_TO_BYTES(1) - 1 + EXTRA_BYTES))
|
| 579 |
|
|
# ifdef ALIGN_DOUBLE
|
| 580 |
|
|
# define ALIGNED_WORDS(n) \
|
| 581 |
|
|
(BYTES_TO_WORDS((n) + WORDS_TO_BYTES(2) - 1 + EXTRA_BYTES) & ~1)
|
| 582 |
|
|
# else
|
| 583 |
|
|
# define ALIGNED_WORDS(n) ROUNDED_UP_WORDS(n)
|
| 584 |
|
|
# endif
|
| 585 |
|
|
# define SMALL_OBJ(bytes) ((bytes) <= (MAXOBJBYTES - EXTRA_BYTES))
|
| 586 |
|
|
# define ADD_SLOP(bytes) ((bytes) + EXTRA_BYTES)
|
| 587 |
|
|
# ifndef MIN_WORDS
|
| 588 |
|
|
/* MIN_WORDS is the size of the smallest allocated object. */
|
| 589 |
|
|
/* 1 and 2 are the only valid values. */
|
| 590 |
|
|
/* 2 must be used if: */
|
| 591 |
|
|
/* - GC_gcj_malloc can be used for objects of requested */
|
| 592 |
|
|
/* size smaller than 2 words, or */
|
| 593 |
|
|
/* - USE_MARK_BYTES is defined. */
|
| 594 |
|
|
# if defined(USE_MARK_BYTES) || defined(GC_GCJ_SUPPORT)
|
| 595 |
|
|
# define MIN_WORDS 2 /* Smallest allocated object. */
|
| 596 |
|
|
# else
|
| 597 |
|
|
# define MIN_WORDS 1
|
| 598 |
|
|
# endif
|
| 599 |
|
|
# endif
|
| 600 |
|
|
|
| 601 |
|
|
|
| 602 |
|
|
/*
|
| 603 |
|
|
* Hash table representation of sets of pages. This assumes it is
|
| 604 |
|
|
* OK to add spurious entries to sets.
|
| 605 |
|
|
* Used by black-listing code, and perhaps by dirty bit maintenance code.
|
| 606 |
|
|
*/
|
| 607 |
|
|
|
| 608 |
|
|
# ifdef LARGE_CONFIG
|
| 609 |
|
|
# define LOG_PHT_ENTRIES 20 /* Collisions likely at 1M blocks, */
|
| 610 |
|
|
/* which is >= 4GB. Each table takes */
|
| 611 |
|
|
/* 128KB, some of which may never be */
|
| 612 |
|
|
/* touched. */
|
| 613 |
|
|
# else
|
| 614 |
|
|
# ifdef SMALL_CONFIG
|
| 615 |
|
|
# define LOG_PHT_ENTRIES 14 /* Collisions are likely if heap grows */
|
| 616 |
|
|
/* to more than 16K hblks = 64MB. */
|
| 617 |
|
|
/* Each hash table occupies 2K bytes. */
|
| 618 |
|
|
# else /* default "medium" configuration */
|
| 619 |
|
|
# define LOG_PHT_ENTRIES 16 /* Collisions are likely if heap grows */
|
| 620 |
|
|
/* to more than 64K hblks >= 256MB. */
|
| 621 |
|
|
/* Each hash table occupies 8K bytes. */
|
| 622 |
|
|
/* Even for somewhat smaller heaps, */
|
| 623 |
|
|
/* say half that, collisions may be an */
|
| 624 |
|
|
/* issue because we blacklist */
|
| 625 |
|
|
/* addresses outside the heap. */
|
| 626 |
|
|
# endif
|
| 627 |
|
|
# endif
|
| 628 |
|
|
# define PHT_ENTRIES ((word)1 << LOG_PHT_ENTRIES)
|
| 629 |
|
|
# define PHT_SIZE (PHT_ENTRIES >> LOGWL)
|
| 630 |
|
|
typedef word page_hash_table[PHT_SIZE];
|
| 631 |
|
|
|
| 632 |
|
|
# define PHT_HASH(addr) ((((word)(addr)) >> LOG_HBLKSIZE) & (PHT_ENTRIES - 1))
|
| 633 |
|
|
|
| 634 |
|
|
# define get_pht_entry_from_index(bl, index) \
|
| 635 |
|
|
(((bl)[divWORDSZ(index)] >> modWORDSZ(index)) & 1)
|
| 636 |
|
|
# define set_pht_entry_from_index(bl, index) \
|
| 637 |
|
|
(bl)[divWORDSZ(index)] |= (word)1 << modWORDSZ(index)
|
| 638 |
|
|
# define clear_pht_entry_from_index(bl, index) \
|
| 639 |
|
|
(bl)[divWORDSZ(index)] &= ~((word)1 << modWORDSZ(index))
|
| 640 |
|
|
/* And a dumb but thread-safe version of set_pht_entry_from_index. */
|
| 641 |
|
|
/* This sets (many) extra bits. */
|
| 642 |
|
|
# define set_pht_entry_from_index_safe(bl, index) \
|
| 643 |
|
|
(bl)[divWORDSZ(index)] = ONES
|
| 644 |
|
|
|
| 645 |
|
|
|
| 646 |
|
|
|
| 647 |
|
|
/********************************************/
|
| 648 |
|
|
/* */
|
| 649 |
|
|
/* H e a p B l o c k s */
|
| 650 |
|
|
/* */
|
| 651 |
|
|
/********************************************/
|
| 652 |
|
|
|
| 653 |
|
|
/* heap block header */
|
| 654 |
|
|
#define HBLKMASK (HBLKSIZE-1)
|
| 655 |
|
|
|
| 656 |
|
|
#define BITS_PER_HBLK (CPP_HBLKSIZE * 8)
|
| 657 |
|
|
|
| 658 |
|
|
#define MARK_BITS_PER_HBLK (BITS_PER_HBLK/CPP_WORDSZ)
|
| 659 |
|
|
/* upper bound */
|
| 660 |
|
|
/* We allocate 1 bit/word, unless USE_MARK_BYTES */
|
| 661 |
|
|
/* is defined. Only the first word */
|
| 662 |
|
|
/* in each object is actually marked. */
|
| 663 |
|
|
|
| 664 |
|
|
# ifdef USE_MARK_BYTES
|
| 665 |
|
|
# define MARK_BITS_SZ (MARK_BITS_PER_HBLK/2)
|
| 666 |
|
|
/* Unlike the other case, this is in units of bytes. */
|
| 667 |
|
|
/* We actually allocate only every second mark bit, since we */
|
| 668 |
|
|
/* force all objects to be doubleword aligned. */
|
| 669 |
|
|
/* However, each mark bit is allocated as a byte. */
|
| 670 |
|
|
# else
|
| 671 |
|
|
# define MARK_BITS_SZ (MARK_BITS_PER_HBLK/CPP_WORDSZ)
|
| 672 |
|
|
# endif
|
| 673 |
|
|
|
| 674 |
|
|
/* We maintain layout maps for heap blocks containing objects of a given */
|
| 675 |
|
|
/* size. Each entry in this map describes a byte offset and has the */
|
| 676 |
|
|
/* following type. */
|
| 677 |
|
|
typedef unsigned char map_entry_type;
|
| 678 |
|
|
|
| 679 |
|
|
struct hblkhdr {
|
| 680 |
|
|
word hb_sz; /* If in use, size in words, of objects in the block. */
|
| 681 |
|
|
/* if free, the size in bytes of the whole block */
|
| 682 |
|
|
struct hblk * hb_next; /* Link field for hblk free list */
|
| 683 |
|
|
/* and for lists of chunks waiting to be */
|
| 684 |
|
|
/* reclaimed. */
|
| 685 |
|
|
struct hblk * hb_prev; /* Backwards link for free list. */
|
| 686 |
|
|
word hb_descr; /* object descriptor for marking. See */
|
| 687 |
|
|
/* mark.h. */
|
| 688 |
|
|
map_entry_type * hb_map;
|
| 689 |
|
|
/* A pointer to a pointer validity map of the block. */
|
| 690 |
|
|
/* See GC_obj_map. */
|
| 691 |
|
|
/* Valid for all blocks with headers. */
|
| 692 |
|
|
/* Free blocks point to GC_invalid_map. */
|
| 693 |
|
|
unsigned char hb_obj_kind;
|
| 694 |
|
|
/* Kind of objects in the block. Each kind */
|
| 695 |
|
|
/* identifies a mark procedure and a set of */
|
| 696 |
|
|
/* list headers. Sometimes called regions. */
|
| 697 |
|
|
unsigned char hb_flags;
|
| 698 |
|
|
# define IGNORE_OFF_PAGE 1 /* Ignore pointers that do not */
|
| 699 |
|
|
/* point to the first page of */
|
| 700 |
|
|
/* this object. */
|
| 701 |
|
|
# define WAS_UNMAPPED 2 /* This is a free block, which has */
|
| 702 |
|
|
/* been unmapped from the address */
|
| 703 |
|
|
/* space. */
|
| 704 |
|
|
/* GC_remap must be invoked on it */
|
| 705 |
|
|
/* before it can be reallocated. */
|
| 706 |
|
|
/* Only set with USE_MUNMAP. */
|
| 707 |
|
|
unsigned short hb_last_reclaimed;
|
| 708 |
|
|
/* Value of GC_gc_no when block was */
|
| 709 |
|
|
/* last allocated or swept. May wrap. */
|
| 710 |
|
|
/* For a free block, this is maintained */
|
| 711 |
|
|
/* only for USE_MUNMAP, and indicates */
|
| 712 |
|
|
/* when the header was allocated, or */
|
| 713 |
|
|
/* when the size of the block last */
|
| 714 |
|
|
/* changed. */
|
| 715 |
|
|
# ifdef USE_MARK_BYTES
|
| 716 |
|
|
union {
|
| 717 |
|
|
char _hb_marks[MARK_BITS_SZ];
|
| 718 |
|
|
/* The i'th byte is 1 if the object */
|
| 719 |
|
|
/* starting at word 2i is marked, 0 o.w. */
|
| 720 |
|
|
word dummy; /* Force word alignment of mark bytes. */
|
| 721 |
|
|
} _mark_byte_union;
|
| 722 |
|
|
# define hb_marks _mark_byte_union._hb_marks
|
| 723 |
|
|
# else
|
| 724 |
|
|
word hb_marks[MARK_BITS_SZ];
|
| 725 |
|
|
/* Bit i in the array refers to the */
|
| 726 |
|
|
/* object starting at the ith word (header */
|
| 727 |
|
|
/* INCLUDED) in the heap block. */
|
| 728 |
|
|
/* The lsb of word 0 is numbered 0. */
|
| 729 |
|
|
/* Unused bits are invalid, and are */
|
| 730 |
|
|
/* occasionally set, e.g for uncollectable */
|
| 731 |
|
|
/* objects. */
|
| 732 |
|
|
# endif /* !USE_MARK_BYTES */
|
| 733 |
|
|
};
|
| 734 |
|
|
|
| 735 |
|
|
/* heap block body */
|
| 736 |
|
|
|
| 737 |
|
|
# define BODY_SZ (HBLKSIZE/sizeof(word))
|
| 738 |
|
|
|
| 739 |
|
|
struct hblk {
|
| 740 |
|
|
word hb_body[BODY_SZ];
|
| 741 |
|
|
};
|
| 742 |
|
|
|
| 743 |
|
|
# define HBLK_IS_FREE(hdr) ((hdr) -> hb_map == GC_invalid_map)
|
| 744 |
|
|
|
| 745 |
|
|
# define OBJ_SZ_TO_BLOCKS(sz) \
|
| 746 |
|
|
divHBLKSZ(WORDS_TO_BYTES(sz) + HBLKSIZE-1)
|
| 747 |
|
|
/* Size of block (in units of HBLKSIZE) needed to hold objects of */
|
| 748 |
|
|
/* given sz (in words). */
|
| 749 |
|
|
|
| 750 |
|
|
/* Object free list link */
|
| 751 |
|
|
# define obj_link(p) (*(ptr_t *)(p))
|
| 752 |
|
|
|
| 753 |
|
|
# define LOG_MAX_MARK_PROCS 6
|
| 754 |
|
|
# define MAX_MARK_PROCS (1 << LOG_MAX_MARK_PROCS)
|
| 755 |
|
|
|
| 756 |
|
|
/* Root sets. Logically private to mark_rts.c. But we don't want the */
|
| 757 |
|
|
/* tables scanned, so we put them here. */
|
| 758 |
|
|
/* MAX_ROOT_SETS is the maximum number of ranges that can be */
|
| 759 |
|
|
/* registered as static roots. */
|
| 760 |
|
|
# ifdef LARGE_CONFIG
|
| 761 |
|
|
# define MAX_ROOT_SETS 4096
|
| 762 |
|
|
# else
|
| 763 |
|
|
/* GCJ LOCAL: MAX_ROOT_SETS increased to permit more shared */
|
| 764 |
|
|
/* libraries to be loaded. */
|
| 765 |
|
|
# define MAX_ROOT_SETS 1024
|
| 766 |
|
|
# endif
|
| 767 |
|
|
|
| 768 |
|
|
# define MAX_EXCLUSIONS (MAX_ROOT_SETS/4)
|
| 769 |
|
|
/* Maximum number of segments that can be excluded from root sets. */
|
| 770 |
|
|
|
| 771 |
|
|
/*
|
| 772 |
|
|
* Data structure for excluded static roots.
|
| 773 |
|
|
*/
|
| 774 |
|
|
struct exclusion {
|
| 775 |
|
|
ptr_t e_start;
|
| 776 |
|
|
ptr_t e_end;
|
| 777 |
|
|
};
|
| 778 |
|
|
|
| 779 |
|
|
/* Data structure for list of root sets. */
|
| 780 |
|
|
/* We keep a hash table, so that we can filter out duplicate additions. */
|
| 781 |
|
|
/* Under Win32, we need to do a better job of filtering overlaps, so */
|
| 782 |
|
|
/* we resort to sequential search, and pay the price. */
|
| 783 |
|
|
struct roots {
|
| 784 |
|
|
ptr_t r_start;
|
| 785 |
|
|
ptr_t r_end;
|
| 786 |
|
|
# if !defined(MSWIN32) && !defined(MSWINCE)
|
| 787 |
|
|
struct roots * r_next;
|
| 788 |
|
|
# endif
|
| 789 |
|
|
GC_bool r_tmp;
|
| 790 |
|
|
/* Delete before registering new dynamic libraries */
|
| 791 |
|
|
};
|
| 792 |
|
|
|
| 793 |
|
|
#if !defined(MSWIN32) && !defined(MSWINCE)
|
| 794 |
|
|
/* Size of hash table index to roots. */
|
| 795 |
|
|
# define LOG_RT_SIZE 6
|
| 796 |
|
|
# define RT_SIZE (1 << LOG_RT_SIZE) /* Power of 2, may be != MAX_ROOT_SETS */
|
| 797 |
|
|
#endif
|
| 798 |
|
|
|
| 799 |
|
|
/* Lists of all heap blocks and free lists */
|
| 800 |
|
|
/* as well as other random data structures */
|
| 801 |
|
|
/* that should not be scanned by the */
|
| 802 |
|
|
/* collector. */
|
| 803 |
|
|
/* These are grouped together in a struct */
|
| 804 |
|
|
/* so that they can be easily skipped by the */
|
| 805 |
|
|
/* GC_mark routine. */
|
| 806 |
|
|
/* The ordering is weird to make GC_malloc */
|
| 807 |
|
|
/* faster by keeping the important fields */
|
| 808 |
|
|
/* sufficiently close together that a */
|
| 809 |
|
|
/* single load of a base register will do. */
|
| 810 |
|
|
/* Scalars that could easily appear to */
|
| 811 |
|
|
/* be pointers are also put here. */
|
| 812 |
|
|
/* The main fields should precede any */
|
| 813 |
|
|
/* conditionally included fields, so that */
|
| 814 |
|
|
/* gc_inl.h will work even if a different set */
|
| 815 |
|
|
/* of macros is defined when the client is */
|
| 816 |
|
|
/* compiled. */
|
| 817 |
|
|
|
| 818 |
|
|
struct _GC_arrays {
|
| 819 |
|
|
word _heapsize;
|
| 820 |
|
|
word _max_heapsize;
|
| 821 |
|
|
word _requested_heapsize; /* Heap size due to explicit expansion */
|
| 822 |
|
|
ptr_t _last_heap_addr;
|
| 823 |
|
|
ptr_t _prev_heap_addr;
|
| 824 |
|
|
word _large_free_bytes;
|
| 825 |
|
|
/* Total bytes contained in blocks on large object free */
|
| 826 |
|
|
/* list. */
|
| 827 |
|
|
word _large_allocd_bytes;
|
| 828 |
|
|
/* Total number of bytes in allocated large objects blocks. */
|
| 829 |
|
|
/* For the purposes of this counter and the next one only, a */
|
| 830 |
|
|
/* large object is one that occupies a block of at least */
|
| 831 |
|
|
/* 2*HBLKSIZE. */
|
| 832 |
|
|
word _max_large_allocd_bytes;
|
| 833 |
|
|
/* Maximum number of bytes that were ever allocated in */
|
| 834 |
|
|
/* large object blocks. This is used to help decide when it */
|
| 835 |
|
|
/* is safe to split up a large block. */
|
| 836 |
|
|
word _words_allocd_before_gc;
|
| 837 |
|
|
/* Number of words allocated before this */
|
| 838 |
|
|
/* collection cycle. */
|
| 839 |
|
|
# ifndef SEPARATE_GLOBALS
|
| 840 |
|
|
word _words_allocd;
|
| 841 |
|
|
/* Number of words allocated during this collection cycle */
|
| 842 |
|
|
# endif
|
| 843 |
|
|
word _words_wasted;
|
| 844 |
|
|
/* Number of words wasted due to internal fragmentation */
|
| 845 |
|
|
/* in large objects, or due to dropping blacklisted */
|
| 846 |
|
|
/* blocks, since last gc. Approximate. */
|
| 847 |
|
|
word _words_finalized;
|
| 848 |
|
|
/* Approximate number of words in objects (and headers) */
|
| 849 |
|
|
/* That became ready for finalization in the last */
|
| 850 |
|
|
/* collection. */
|
| 851 |
|
|
word _non_gc_bytes_at_gc;
|
| 852 |
|
|
/* Number of explicitly managed bytes of storage */
|
| 853 |
|
|
/* at last collection. */
|
| 854 |
|
|
word _mem_freed;
|
| 855 |
|
|
/* Number of explicitly deallocated words of memory */
|
| 856 |
|
|
/* since last collection. */
|
| 857 |
|
|
word _finalizer_mem_freed;
|
| 858 |
|
|
/* Words of memory explicitly deallocated while */
|
| 859 |
|
|
/* finalizers were running. Used to approximate mem. */
|
| 860 |
|
|
/* explicitly deallocated by finalizers. */
|
| 861 |
|
|
ptr_t _scratch_end_ptr;
|
| 862 |
|
|
ptr_t _scratch_last_end_ptr;
|
| 863 |
|
|
/* Used by headers.c, and can easily appear to point to */
|
| 864 |
|
|
/* heap. */
|
| 865 |
|
|
GC_mark_proc _mark_procs[MAX_MARK_PROCS];
|
| 866 |
|
|
/* Table of user-defined mark procedures. There is */
|
| 867 |
|
|
/* a small number of these, which can be referenced */
|
| 868 |
|
|
/* by DS_PROC mark descriptors. See gc_mark.h. */
|
| 869 |
|
|
|
| 870 |
|
|
# ifndef SEPARATE_GLOBALS
|
| 871 |
|
|
ptr_t _objfreelist[MAXOBJSZ+1];
|
| 872 |
|
|
/* free list for objects */
|
| 873 |
|
|
ptr_t _aobjfreelist[MAXOBJSZ+1];
|
| 874 |
|
|
/* free list for atomic objs */
|
| 875 |
|
|
# endif
|
| 876 |
|
|
|
| 877 |
|
|
ptr_t _uobjfreelist[MAXOBJSZ+1];
|
| 878 |
|
|
/* uncollectable but traced objs */
|
| 879 |
|
|
/* objects on this and auobjfreelist */
|
| 880 |
|
|
/* are always marked, except during */
|
| 881 |
|
|
/* garbage collections. */
|
| 882 |
|
|
# ifdef ATOMIC_UNCOLLECTABLE
|
| 883 |
|
|
ptr_t _auobjfreelist[MAXOBJSZ+1];
|
| 884 |
|
|
# endif
|
| 885 |
|
|
/* uncollectable but traced objs */
|
| 886 |
|
|
|
| 887 |
|
|
# ifdef GATHERSTATS
|
| 888 |
|
|
word _composite_in_use;
|
| 889 |
|
|
/* Number of words in accessible composite */
|
| 890 |
|
|
/* objects. */
|
| 891 |
|
|
word _atomic_in_use;
|
| 892 |
|
|
/* Number of words in accessible atomic */
|
| 893 |
|
|
/* objects. */
|
| 894 |
|
|
# endif
|
| 895 |
|
|
# ifdef USE_MUNMAP
|
| 896 |
|
|
word _unmapped_bytes;
|
| 897 |
|
|
# endif
|
| 898 |
|
|
# ifdef MERGE_SIZES
|
| 899 |
|
|
unsigned _size_map[WORDS_TO_BYTES(MAXOBJSZ+1)];
|
| 900 |
|
|
/* Number of words to allocate for a given allocation request in */
|
| 901 |
|
|
/* bytes. */
|
| 902 |
|
|
# endif
|
| 903 |
|
|
|
| 904 |
|
|
# ifdef STUBBORN_ALLOC
|
| 905 |
|
|
ptr_t _sobjfreelist[MAXOBJSZ+1];
|
| 906 |
|
|
# endif
|
| 907 |
|
|
/* free list for immutable objects */
|
| 908 |
|
|
map_entry_type * _obj_map[MAXOBJSZ+1];
|
| 909 |
|
|
/* If not NIL, then a pointer to a map of valid */
|
| 910 |
|
|
/* object addresses. _obj_map[sz][i] is j if the */
|
| 911 |
|
|
/* address block_start+i is a valid pointer */
|
| 912 |
|
|
/* to an object at block_start + */
|
| 913 |
|
|
/* WORDS_TO_BYTES(BYTES_TO_WORDS(i) - j) */
|
| 914 |
|
|
/* I.e. j is a word displacement from the */
|
| 915 |
|
|
/* object beginning. */
|
| 916 |
|
|
/* The entry is OBJ_INVALID if the corresponding */
|
| 917 |
|
|
/* address is not a valid pointer. It is */
|
| 918 |
|
|
/* OFFSET_TOO_BIG if the value j would be too */
|
| 919 |
|
|
/* large to fit in the entry. (Note that the */
|
| 920 |
|
|
/* size of these entries matters, both for */
|
| 921 |
|
|
/* space consumption and for cache utilization.) */
|
| 922 |
|
|
# define OFFSET_TOO_BIG 0xfe
|
| 923 |
|
|
# define OBJ_INVALID 0xff
|
| 924 |
|
|
# define MAP_ENTRY(map, bytes) (map)[bytes]
|
| 925 |
|
|
# define MAP_ENTRIES HBLKSIZE
|
| 926 |
|
|
# define MAP_SIZE MAP_ENTRIES
|
| 927 |
|
|
# define CPP_MAX_OFFSET (OFFSET_TOO_BIG - 1)
|
| 928 |
|
|
# define MAX_OFFSET ((word)CPP_MAX_OFFSET)
|
| 929 |
|
|
/* The following are used only if GC_all_interior_ptrs != 0 */
|
| 930 |
|
|
# define VALID_OFFSET_SZ \
|
| 931 |
|
|
(CPP_MAX_OFFSET > WORDS_TO_BYTES(CPP_MAXOBJSZ)? \
|
| 932 |
|
|
CPP_MAX_OFFSET+1 \
|
| 933 |
|
|
: WORDS_TO_BYTES(CPP_MAXOBJSZ)+1)
|
| 934 |
|
|
char _valid_offsets[VALID_OFFSET_SZ];
|
| 935 |
|
|
/* GC_valid_offsets[i] == TRUE ==> i */
|
| 936 |
|
|
/* is registered as a displacement. */
|
| 937 |
|
|
char _modws_valid_offsets[sizeof(word)];
|
| 938 |
|
|
/* GC_valid_offsets[i] ==> */
|
| 939 |
|
|
/* GC_modws_valid_offsets[i%sizeof(word)] */
|
| 940 |
|
|
# define OFFSET_VALID(displ) \
|
| 941 |
|
|
(GC_all_interior_pointers || GC_valid_offsets[displ])
|
| 942 |
|
|
# ifdef STUBBORN_ALLOC
|
| 943 |
|
|
page_hash_table _changed_pages;
|
| 944 |
|
|
/* Stubborn object pages that were changes since last call to */
|
| 945 |
|
|
/* GC_read_changed. */
|
| 946 |
|
|
page_hash_table _prev_changed_pages;
|
| 947 |
|
|
/* Stubborn object pages that were changes before last call to */
|
| 948 |
|
|
/* GC_read_changed. */
|
| 949 |
|
|
# endif
|
| 950 |
|
|
# if defined(PROC_VDB) || defined(MPROTECT_VDB)
|
| 951 |
|
|
page_hash_table _grungy_pages; /* Pages that were dirty at last */
|
| 952 |
|
|
/* GC_read_dirty. */
|
| 953 |
|
|
# endif
|
| 954 |
|
|
# ifdef MPROTECT_VDB
|
| 955 |
|
|
VOLATILE page_hash_table _dirty_pages;
|
| 956 |
|
|
/* Pages dirtied since last GC_read_dirty. */
|
| 957 |
|
|
# endif
|
| 958 |
|
|
# ifdef PROC_VDB
|
| 959 |
|
|
page_hash_table _written_pages; /* Pages ever dirtied */
|
| 960 |
|
|
# endif
|
| 961 |
|
|
# ifdef LARGE_CONFIG
|
| 962 |
|
|
# if CPP_WORDSZ > 32
|
| 963 |
|
|
# define MAX_HEAP_SECTS 4096 /* overflows at roughly 64 GB */
|
| 964 |
|
|
# else
|
| 965 |
|
|
# define MAX_HEAP_SECTS 768 /* Separately added heap sections. */
|
| 966 |
|
|
# endif
|
| 967 |
|
|
# else
|
| 968 |
|
|
# ifdef SMALL_CONFIG
|
| 969 |
|
|
# define MAX_HEAP_SECTS 128 /* Roughly 256MB (128*2048*1K) */
|
| 970 |
|
|
# else
|
| 971 |
|
|
# define MAX_HEAP_SECTS 384 /* Roughly 3GB */
|
| 972 |
|
|
# endif
|
| 973 |
|
|
# endif
|
| 974 |
|
|
struct HeapSect {
|
| 975 |
|
|
ptr_t hs_start; word hs_bytes;
|
| 976 |
|
|
} _heap_sects[MAX_HEAP_SECTS];
|
| 977 |
|
|
# if defined(MSWIN32) || defined(MSWINCE)
|
| 978 |
|
|
ptr_t _heap_bases[MAX_HEAP_SECTS];
|
| 979 |
|
|
/* Start address of memory regions obtained from kernel. */
|
| 980 |
|
|
# endif
|
| 981 |
|
|
# ifdef MSWINCE
|
| 982 |
|
|
word _heap_lengths[MAX_HEAP_SECTS];
|
| 983 |
|
|
/* Commited lengths of memory regions obtained from kernel. */
|
| 984 |
|
|
# endif
|
| 985 |
|
|
struct roots _static_roots[MAX_ROOT_SETS];
|
| 986 |
|
|
# if !defined(MSWIN32) && !defined(MSWINCE)
|
| 987 |
|
|
struct roots * _root_index[RT_SIZE];
|
| 988 |
|
|
# endif
|
| 989 |
|
|
struct exclusion _excl_table[MAX_EXCLUSIONS];
|
| 990 |
|
|
/* Block header index; see gc_headers.h */
|
| 991 |
|
|
bottom_index * _all_nils;
|
| 992 |
|
|
bottom_index * _top_index [TOP_SZ];
|
| 993 |
|
|
#ifdef SAVE_CALL_CHAIN
|
| 994 |
|
|
struct callinfo _last_stack[NFRAMES]; /* Stack at last garbage collection.*/
|
| 995 |
|
|
/* Useful for debugging mysterious */
|
| 996 |
|
|
/* object disappearances. */
|
| 997 |
|
|
/* In the multithreaded case, we */
|
| 998 |
|
|
/* currently only save the calling */
|
| 999 |
|
|
/* stack. */
|
| 1000 |
|
|
#endif
|
| 1001 |
|
|
};
|
| 1002 |
|
|
|
| 1003 |
|
|
GC_API GC_FAR struct _GC_arrays GC_arrays;
|
| 1004 |
|
|
|
| 1005 |
|
|
# ifndef SEPARATE_GLOBALS
|
| 1006 |
|
|
# define GC_objfreelist GC_arrays._objfreelist
|
| 1007 |
|
|
# define GC_aobjfreelist GC_arrays._aobjfreelist
|
| 1008 |
|
|
# define GC_words_allocd GC_arrays._words_allocd
|
| 1009 |
|
|
# endif
|
| 1010 |
|
|
# define GC_uobjfreelist GC_arrays._uobjfreelist
|
| 1011 |
|
|
# ifdef ATOMIC_UNCOLLECTABLE
|
| 1012 |
|
|
# define GC_auobjfreelist GC_arrays._auobjfreelist
|
| 1013 |
|
|
# endif
|
| 1014 |
|
|
# define GC_sobjfreelist GC_arrays._sobjfreelist
|
| 1015 |
|
|
# define GC_valid_offsets GC_arrays._valid_offsets
|
| 1016 |
|
|
# define GC_modws_valid_offsets GC_arrays._modws_valid_offsets
|
| 1017 |
|
|
# ifdef STUBBORN_ALLOC
|
| 1018 |
|
|
# define GC_changed_pages GC_arrays._changed_pages
|
| 1019 |
|
|
# define GC_prev_changed_pages GC_arrays._prev_changed_pages
|
| 1020 |
|
|
# endif
|
| 1021 |
|
|
# define GC_obj_map GC_arrays._obj_map
|
| 1022 |
|
|
# define GC_last_heap_addr GC_arrays._last_heap_addr
|
| 1023 |
|
|
# define GC_prev_heap_addr GC_arrays._prev_heap_addr
|
| 1024 |
|
|
# define GC_words_wasted GC_arrays._words_wasted
|
| 1025 |
|
|
# define GC_large_free_bytes GC_arrays._large_free_bytes
|
| 1026 |
|
|
# define GC_large_allocd_bytes GC_arrays._large_allocd_bytes
|
| 1027 |
|
|
# define GC_max_large_allocd_bytes GC_arrays._max_large_allocd_bytes
|
| 1028 |
|
|
# define GC_words_finalized GC_arrays._words_finalized
|
| 1029 |
|
|
# define GC_non_gc_bytes_at_gc GC_arrays._non_gc_bytes_at_gc
|
| 1030 |
|
|
# define GC_mem_freed GC_arrays._mem_freed
|
| 1031 |
|
|
# define GC_finalizer_mem_freed GC_arrays._finalizer_mem_freed
|
| 1032 |
|
|
# define GC_scratch_end_ptr GC_arrays._scratch_end_ptr
|
| 1033 |
|
|
# define GC_scratch_last_end_ptr GC_arrays._scratch_last_end_ptr
|
| 1034 |
|
|
# define GC_mark_procs GC_arrays._mark_procs
|
| 1035 |
|
|
# define GC_heapsize GC_arrays._heapsize
|
| 1036 |
|
|
# define GC_max_heapsize GC_arrays._max_heapsize
|
| 1037 |
|
|
# define GC_requested_heapsize GC_arrays._requested_heapsize
|
| 1038 |
|
|
# define GC_words_allocd_before_gc GC_arrays._words_allocd_before_gc
|
| 1039 |
|
|
# define GC_heap_sects GC_arrays._heap_sects
|
| 1040 |
|
|
# define GC_last_stack GC_arrays._last_stack
|
| 1041 |
|
|
# ifdef USE_MUNMAP
|
| 1042 |
|
|
# define GC_unmapped_bytes GC_arrays._unmapped_bytes
|
| 1043 |
|
|
# endif
|
| 1044 |
|
|
# if defined(MSWIN32) || defined(MSWINCE)
|
| 1045 |
|
|
# define GC_heap_bases GC_arrays._heap_bases
|
| 1046 |
|
|
# endif
|
| 1047 |
|
|
# ifdef MSWINCE
|
| 1048 |
|
|
# define GC_heap_lengths GC_arrays._heap_lengths
|
| 1049 |
|
|
# endif
|
| 1050 |
|
|
# define GC_static_roots GC_arrays._static_roots
|
| 1051 |
|
|
# define GC_root_index GC_arrays._root_index
|
| 1052 |
|
|
# define GC_excl_table GC_arrays._excl_table
|
| 1053 |
|
|
# define GC_all_nils GC_arrays._all_nils
|
| 1054 |
|
|
# define GC_top_index GC_arrays._top_index
|
| 1055 |
|
|
# if defined(PROC_VDB) || defined(MPROTECT_VDB)
|
| 1056 |
|
|
# define GC_grungy_pages GC_arrays._grungy_pages
|
| 1057 |
|
|
# endif
|
| 1058 |
|
|
# ifdef MPROTECT_VDB
|
| 1059 |
|
|
# define GC_dirty_pages GC_arrays._dirty_pages
|
| 1060 |
|
|
# endif
|
| 1061 |
|
|
# ifdef PROC_VDB
|
| 1062 |
|
|
# define GC_written_pages GC_arrays._written_pages
|
| 1063 |
|
|
# endif
|
| 1064 |
|
|
# ifdef GATHERSTATS
|
| 1065 |
|
|
# define GC_composite_in_use GC_arrays._composite_in_use
|
| 1066 |
|
|
# define GC_atomic_in_use GC_arrays._atomic_in_use
|
| 1067 |
|
|
# endif
|
| 1068 |
|
|
# ifdef MERGE_SIZES
|
| 1069 |
|
|
# define GC_size_map GC_arrays._size_map
|
| 1070 |
|
|
# endif
|
| 1071 |
|
|
|
| 1072 |
|
|
# define beginGC_arrays ((ptr_t)(&GC_arrays))
|
| 1073 |
|
|
# define endGC_arrays (((ptr_t)(&GC_arrays)) + (sizeof GC_arrays))
|
| 1074 |
|
|
|
| 1075 |
|
|
#define USED_HEAP_SIZE (GC_heapsize - GC_large_free_bytes)
|
| 1076 |
|
|
|
| 1077 |
|
|
/* Object kinds: */
|
| 1078 |
|
|
# define MAXOBJKINDS 16
|
| 1079 |
|
|
|
| 1080 |
|
|
extern struct obj_kind {
|
| 1081 |
|
|
ptr_t *ok_freelist; /* Array of free listheaders for this kind of object */
|
| 1082 |
|
|
/* Point either to GC_arrays or to storage allocated */
|
| 1083 |
|
|
/* with GC_scratch_alloc. */
|
| 1084 |
|
|
struct hblk **ok_reclaim_list;
|
| 1085 |
|
|
/* List headers for lists of blocks waiting to be */
|
| 1086 |
|
|
/* swept. */
|
| 1087 |
|
|
word ok_descriptor; /* Descriptor template for objects in this */
|
| 1088 |
|
|
/* block. */
|
| 1089 |
|
|
GC_bool ok_relocate_descr;
|
| 1090 |
|
|
/* Add object size in bytes to descriptor */
|
| 1091 |
|
|
/* template to obtain descriptor. Otherwise */
|
| 1092 |
|
|
/* template is used as is. */
|
| 1093 |
|
|
GC_bool ok_init; /* Clear objects before putting them on the free list. */
|
| 1094 |
|
|
} GC_obj_kinds[MAXOBJKINDS];
|
| 1095 |
|
|
|
| 1096 |
|
|
# define beginGC_obj_kinds ((ptr_t)(&GC_obj_kinds))
|
| 1097 |
|
|
# define endGC_obj_kinds (beginGC_obj_kinds + (sizeof GC_obj_kinds))
|
| 1098 |
|
|
|
| 1099 |
|
|
/* Variables that used to be in GC_arrays, but need to be accessed by */
|
| 1100 |
|
|
/* inline allocation code. If they were in GC_arrays, the inlined */
|
| 1101 |
|
|
/* allocation code would include GC_arrays offsets (as it did), which */
|
| 1102 |
|
|
/* introduce maintenance problems. */
|
| 1103 |
|
|
|
| 1104 |
|
|
#ifdef SEPARATE_GLOBALS
|
| 1105 |
|
|
word GC_words_allocd;
|
| 1106 |
|
|
/* Number of words allocated during this collection cycle */
|
| 1107 |
|
|
ptr_t GC_objfreelist[MAXOBJSZ+1];
|
| 1108 |
|
|
/* free list for NORMAL objects */
|
| 1109 |
|
|
# define beginGC_objfreelist ((ptr_t)(&GC_objfreelist))
|
| 1110 |
|
|
# define endGC_objfreelist (beginGC_objfreelist + sizeof(GC_objfreelist))
|
| 1111 |
|
|
|
| 1112 |
|
|
ptr_t GC_aobjfreelist[MAXOBJSZ+1];
|
| 1113 |
|
|
/* free list for atomic (PTRFREE) objs */
|
| 1114 |
|
|
# define beginGC_aobjfreelist ((ptr_t)(&GC_aobjfreelist))
|
| 1115 |
|
|
# define endGC_aobjfreelist (beginGC_aobjfreelist + sizeof(GC_aobjfreelist))
|
| 1116 |
|
|
#endif
|
| 1117 |
|
|
|
| 1118 |
|
|
/* Predefined kinds: */
|
| 1119 |
|
|
# define PTRFREE 0
|
| 1120 |
|
|
# define NORMAL 1
|
| 1121 |
|
|
# define UNCOLLECTABLE 2
|
| 1122 |
|
|
# ifdef ATOMIC_UNCOLLECTABLE
|
| 1123 |
|
|
# define AUNCOLLECTABLE 3
|
| 1124 |
|
|
# define STUBBORN 4
|
| 1125 |
|
|
# define IS_UNCOLLECTABLE(k) (((k) & ~1) == UNCOLLECTABLE)
|
| 1126 |
|
|
# else
|
| 1127 |
|
|
# define STUBBORN 3
|
| 1128 |
|
|
# define IS_UNCOLLECTABLE(k) ((k) == UNCOLLECTABLE)
|
| 1129 |
|
|
# endif
|
| 1130 |
|
|
|
| 1131 |
|
|
extern int GC_n_kinds;
|
| 1132 |
|
|
|
| 1133 |
|
|
GC_API word GC_fo_entries;
|
| 1134 |
|
|
|
| 1135 |
|
|
extern word GC_n_heap_sects; /* Number of separately added heap */
|
| 1136 |
|
|
/* sections. */
|
| 1137 |
|
|
|
| 1138 |
|
|
extern word GC_page_size;
|
| 1139 |
|
|
|
| 1140 |
|
|
# if defined(MSWIN32) || defined(MSWINCE)
|
| 1141 |
|
|
struct _SYSTEM_INFO;
|
| 1142 |
|
|
extern struct _SYSTEM_INFO GC_sysinfo;
|
| 1143 |
|
|
extern word GC_n_heap_bases; /* See GC_heap_bases. */
|
| 1144 |
|
|
# endif
|
| 1145 |
|
|
|
| 1146 |
|
|
extern word GC_total_stack_black_listed;
|
| 1147 |
|
|
/* Number of bytes on stack blacklist. */
|
| 1148 |
|
|
|
| 1149 |
|
|
extern word GC_black_list_spacing;
|
| 1150 |
|
|
/* Average number of bytes between blacklisted */
|
| 1151 |
|
|
/* blocks. Approximate. */
|
| 1152 |
|
|
/* Counts only blocks that are */
|
| 1153 |
|
|
/* "stack-blacklisted", i.e. that are */
|
| 1154 |
|
|
/* problematic in the interior of an object. */
|
| 1155 |
|
|
|
| 1156 |
|
|
extern map_entry_type * GC_invalid_map;
|
| 1157 |
|
|
/* Pointer to the nowhere valid hblk map */
|
| 1158 |
|
|
/* Blocks pointing to this map are free. */
|
| 1159 |
|
|
|
| 1160 |
|
|
extern struct hblk * GC_hblkfreelist[];
|
| 1161 |
|
|
/* List of completely empty heap blocks */
|
| 1162 |
|
|
/* Linked through hb_next field of */
|
| 1163 |
|
|
/* header structure associated with */
|
| 1164 |
|
|
/* block. */
|
| 1165 |
|
|
|
| 1166 |
|
|
extern GC_bool GC_objects_are_marked; /* There are marked objects in */
|
| 1167 |
|
|
/* the heap. */
|
| 1168 |
|
|
|
| 1169 |
|
|
#ifndef SMALL_CONFIG
|
| 1170 |
|
|
extern GC_bool GC_incremental;
|
| 1171 |
|
|
/* Using incremental/generational collection. */
|
| 1172 |
|
|
# define TRUE_INCREMENTAL \
|
| 1173 |
|
|
(GC_incremental && GC_time_limit != GC_TIME_UNLIMITED)
|
| 1174 |
|
|
/* True incremental, not just generational, mode */
|
| 1175 |
|
|
#else
|
| 1176 |
|
|
# define GC_incremental FALSE
|
| 1177 |
|
|
/* Hopefully allow optimizer to remove some code. */
|
| 1178 |
|
|
# define TRUE_INCREMENTAL FALSE
|
| 1179 |
|
|
#endif
|
| 1180 |
|
|
|
| 1181 |
|
|
extern GC_bool GC_dirty_maintained;
|
| 1182 |
|
|
/* Dirty bits are being maintained, */
|
| 1183 |
|
|
/* either for incremental collection, */
|
| 1184 |
|
|
/* or to limit the root set. */
|
| 1185 |
|
|
|
| 1186 |
|
|
extern word GC_root_size; /* Total size of registered root sections */
|
| 1187 |
|
|
|
| 1188 |
|
|
extern GC_bool GC_debugging_started; /* GC_debug_malloc has been called. */
|
| 1189 |
|
|
|
| 1190 |
|
|
extern long GC_large_alloc_warn_interval;
|
| 1191 |
|
|
/* Interval between unsuppressed warnings. */
|
| 1192 |
|
|
|
| 1193 |
|
|
extern long GC_large_alloc_warn_suppressed;
|
| 1194 |
|
|
/* Number of warnings suppressed so far. */
|
| 1195 |
|
|
|
| 1196 |
|
|
#ifdef THREADS
|
| 1197 |
|
|
extern GC_bool GC_world_stopped;
|
| 1198 |
|
|
#endif
|
| 1199 |
|
|
|
| 1200 |
|
|
/* Operations */
|
| 1201 |
|
|
# ifndef abs
|
| 1202 |
|
|
# define abs(x) ((x) < 0? (-(x)) : (x))
|
| 1203 |
|
|
# endif
|
| 1204 |
|
|
|
| 1205 |
|
|
|
| 1206 |
|
|
/* Marks are in a reserved area in */
|
| 1207 |
|
|
/* each heap block. Each word has one mark bit associated */
|
| 1208 |
|
|
/* with it. Only those corresponding to the beginning of an */
|
| 1209 |
|
|
/* object are used. */
|
| 1210 |
|
|
|
| 1211 |
|
|
/* Set mark bit correctly, even if mark bits may be concurrently */
|
| 1212 |
|
|
/* accessed. */
|
| 1213 |
|
|
#ifdef PARALLEL_MARK
|
| 1214 |
|
|
# define OR_WORD(addr, bits) \
|
| 1215 |
|
|
{ word old; \
|
| 1216 |
|
|
do { \
|
| 1217 |
|
|
old = *((volatile word *)addr); \
|
| 1218 |
|
|
} while (!GC_compare_and_exchange((addr), old, old | (bits))); \
|
| 1219 |
|
|
}
|
| 1220 |
|
|
# define OR_WORD_EXIT_IF_SET(addr, bits, exit_label) \
|
| 1221 |
|
|
{ word old; \
|
| 1222 |
|
|
word my_bits = (bits); \
|
| 1223 |
|
|
do { \
|
| 1224 |
|
|
old = *((volatile word *)addr); \
|
| 1225 |
|
|
if (old & my_bits) goto exit_label; \
|
| 1226 |
|
|
} while (!GC_compare_and_exchange((addr), old, old | my_bits)); \
|
| 1227 |
|
|
}
|
| 1228 |
|
|
#else
|
| 1229 |
|
|
# define OR_WORD(addr, bits) *(addr) |= (bits)
|
| 1230 |
|
|
# define OR_WORD_EXIT_IF_SET(addr, bits, exit_label) \
|
| 1231 |
|
|
{ \
|
| 1232 |
|
|
word old = *(addr); \
|
| 1233 |
|
|
word my_bits = (bits); \
|
| 1234 |
|
|
if (old & my_bits) goto exit_label; \
|
| 1235 |
|
|
*(addr) = (old | my_bits); \
|
| 1236 |
|
|
}
|
| 1237 |
|
|
#endif
|
| 1238 |
|
|
|
| 1239 |
|
|
/* Mark bit operations */
|
| 1240 |
|
|
|
| 1241 |
|
|
/*
|
| 1242 |
|
|
* Retrieve, set, clear the mark bit corresponding
|
| 1243 |
|
|
* to the nth word in a given heap block.
|
| 1244 |
|
|
*
|
| 1245 |
|
|
* (Recall that bit n corresponds to object beginning at word n
|
| 1246 |
|
|
* relative to the beginning of the block, including unused words)
|
| 1247 |
|
|
*/
|
| 1248 |
|
|
|
| 1249 |
|
|
#ifdef USE_MARK_BYTES
|
| 1250 |
|
|
# define mark_bit_from_hdr(hhdr,n) ((hhdr)->hb_marks[(n) >> 1])
|
| 1251 |
|
|
# define set_mark_bit_from_hdr(hhdr,n) ((hhdr)->hb_marks[(n)>>1]) = 1
|
| 1252 |
|
|
# define clear_mark_bit_from_hdr(hhdr,n) ((hhdr)->hb_marks[(n)>>1]) = 0
|
| 1253 |
|
|
#else /* !USE_MARK_BYTES */
|
| 1254 |
|
|
# define mark_bit_from_hdr(hhdr,n) (((hhdr)->hb_marks[divWORDSZ(n)] \
|
| 1255 |
|
|
>> (modWORDSZ(n))) & (word)1)
|
| 1256 |
|
|
# define set_mark_bit_from_hdr(hhdr,n) \
|
| 1257 |
|
|
OR_WORD((hhdr)->hb_marks+divWORDSZ(n), \
|
| 1258 |
|
|
(word)1 << modWORDSZ(n))
|
| 1259 |
|
|
# define clear_mark_bit_from_hdr(hhdr,n) (hhdr)->hb_marks[divWORDSZ(n)] \
|
| 1260 |
|
|
&= ~((word)1 << modWORDSZ(n))
|
| 1261 |
|
|
#endif /* !USE_MARK_BYTES */
|
| 1262 |
|
|
|
| 1263 |
|
|
/* Important internal collector routines */
|
| 1264 |
|
|
|
| 1265 |
|
|
ptr_t GC_approx_sp GC_PROTO((void));
|
| 1266 |
|
|
|
| 1267 |
|
|
GC_bool GC_should_collect GC_PROTO((void));
|
| 1268 |
|
|
|
| 1269 |
|
|
void GC_apply_to_all_blocks GC_PROTO(( \
|
| 1270 |
|
|
void (*fn) GC_PROTO((struct hblk *h, word client_data)), \
|
| 1271 |
|
|
word client_data));
|
| 1272 |
|
|
/* Invoke fn(hbp, client_data) for each */
|
| 1273 |
|
|
/* allocated heap block. */
|
| 1274 |
|
|
struct hblk * GC_next_used_block GC_PROTO((struct hblk * h));
|
| 1275 |
|
|
/* Return first in-use block >= h */
|
| 1276 |
|
|
struct hblk * GC_prev_block GC_PROTO((struct hblk * h));
|
| 1277 |
|
|
/* Return last block <= h. Returned block */
|
| 1278 |
|
|
/* is managed by GC, but may or may not be in */
|
| 1279 |
|
|
/* use. */
|
| 1280 |
|
|
void GC_mark_init GC_PROTO((void));
|
| 1281 |
|
|
void GC_clear_marks GC_PROTO((void)); /* Clear mark bits for all heap objects. */
|
| 1282 |
|
|
void GC_invalidate_mark_state GC_PROTO((void));
|
| 1283 |
|
|
/* Tell the marker that marked */
|
| 1284 |
|
|
/* objects may point to unmarked */
|
| 1285 |
|
|
/* ones, and roots may point to */
|
| 1286 |
|
|
/* unmarked objects. */
|
| 1287 |
|
|
/* Reset mark stack. */
|
| 1288 |
|
|
GC_bool GC_mark_stack_empty GC_PROTO((void));
|
| 1289 |
|
|
GC_bool GC_mark_some GC_PROTO((ptr_t cold_gc_frame));
|
| 1290 |
|
|
/* Perform about one pages worth of marking */
|
| 1291 |
|
|
/* work of whatever kind is needed. Returns */
|
| 1292 |
|
|
/* quickly if no collection is in progress. */
|
| 1293 |
|
|
/* Return TRUE if mark phase finished. */
|
| 1294 |
|
|
void GC_initiate_gc GC_PROTO((void));
|
| 1295 |
|
|
/* initiate collection. */
|
| 1296 |
|
|
/* If the mark state is invalid, this */
|
| 1297 |
|
|
/* becomes full colleection. Otherwise */
|
| 1298 |
|
|
/* it's partial. */
|
| 1299 |
|
|
void GC_push_all GC_PROTO((ptr_t bottom, ptr_t top));
|
| 1300 |
|
|
/* Push everything in a range */
|
| 1301 |
|
|
/* onto mark stack. */
|
| 1302 |
|
|
void GC_push_selected GC_PROTO(( \
|
| 1303 |
|
|
ptr_t bottom, \
|
| 1304 |
|
|
ptr_t top, \
|
| 1305 |
|
|
int (*dirty_fn) GC_PROTO((struct hblk *h)), \
|
| 1306 |
|
|
void (*push_fn) GC_PROTO((ptr_t bottom, ptr_t top)) ));
|
| 1307 |
|
|
/* Push all pages h in [b,t) s.t. */
|
| 1308 |
|
|
/* select_fn(h) != 0 onto mark stack. */
|
| 1309 |
|
|
#ifndef SMALL_CONFIG
|
| 1310 |
|
|
void GC_push_conditional GC_PROTO((ptr_t b, ptr_t t, GC_bool all));
|
| 1311 |
|
|
#else
|
| 1312 |
|
|
# define GC_push_conditional(b, t, all) GC_push_all(b, t)
|
| 1313 |
|
|
#endif
|
| 1314 |
|
|
/* Do either of the above, depending */
|
| 1315 |
|
|
/* on the third arg. */
|
| 1316 |
|
|
void GC_push_all_stack GC_PROTO((ptr_t b, ptr_t t));
|
| 1317 |
|
|
/* As above, but consider */
|
| 1318 |
|
|
/* interior pointers as valid */
|
| 1319 |
|
|
void GC_push_all_eager GC_PROTO((ptr_t b, ptr_t t));
|
| 1320 |
|
|
/* Same as GC_push_all_stack, but */
|
| 1321 |
|
|
/* ensures that stack is scanned */
|
| 1322 |
|
|
/* immediately, not just scheduled */
|
| 1323 |
|
|
/* for scanning. */
|
| 1324 |
|
|
#ifndef THREADS
|
| 1325 |
|
|
void GC_push_all_stack_partially_eager GC_PROTO(( \
|
| 1326 |
|
|
ptr_t bottom, ptr_t top, ptr_t cold_gc_frame ));
|
| 1327 |
|
|
/* Similar to GC_push_all_eager, but only the */
|
| 1328 |
|
|
/* part hotter than cold_gc_frame is scanned */
|
| 1329 |
|
|
/* immediately. Needed to ensure that callee- */
|
| 1330 |
|
|
/* save registers are not missed. */
|
| 1331 |
|
|
#else
|
| 1332 |
|
|
/* In the threads case, we push part of the current thread stack */
|
| 1333 |
|
|
/* with GC_push_all_eager when we push the registers. This gets the */
|
| 1334 |
|
|
/* callee-save registers that may disappear. The remainder of the */
|
| 1335 |
|
|
/* stacks are scheduled for scanning in *GC_push_other_roots, which */
|
| 1336 |
|
|
/* is thread-package-specific. */
|
| 1337 |
|
|
#endif
|
| 1338 |
|
|
void GC_push_current_stack GC_PROTO((ptr_t cold_gc_frame));
|
| 1339 |
|
|
/* Push enough of the current stack eagerly to */
|
| 1340 |
|
|
/* ensure that callee-save registers saved in */
|
| 1341 |
|
|
/* GC frames are scanned. */
|
| 1342 |
|
|
/* In the non-threads case, schedule entire */
|
| 1343 |
|
|
/* stack for scanning. */
|
| 1344 |
|
|
void GC_push_roots GC_PROTO((GC_bool all, ptr_t cold_gc_frame));
|
| 1345 |
|
|
/* Push all or dirty roots. */
|
| 1346 |
|
|
extern void (*GC_push_other_roots) GC_PROTO((void));
|
| 1347 |
|
|
/* Push system or application specific roots */
|
| 1348 |
|
|
/* onto the mark stack. In some environments */
|
| 1349 |
|
|
/* (e.g. threads environments) this is */
|
| 1350 |
|
|
/* predfined to be non-zero. A client supplied */
|
| 1351 |
|
|
/* replacement should also call the original */
|
| 1352 |
|
|
/* function. */
|
| 1353 |
|
|
extern void GC_push_gc_structures GC_PROTO((void));
|
| 1354 |
|
|
/* Push GC internal roots. These are normally */
|
| 1355 |
|
|
/* included in the static data segment, and */
|
| 1356 |
|
|
/* Thus implicitly pushed. But we must do this */
|
| 1357 |
|
|
/* explicitly if normal root processing is */
|
| 1358 |
|
|
/* disabled. Calls the following: */
|
| 1359 |
|
|
extern void GC_push_finalizer_structures GC_PROTO((void));
|
| 1360 |
|
|
extern void GC_push_stubborn_structures GC_PROTO((void));
|
| 1361 |
|
|
# ifdef THREADS
|
| 1362 |
|
|
extern void GC_push_thread_structures GC_PROTO((void));
|
| 1363 |
|
|
# endif
|
| 1364 |
|
|
extern void (*GC_start_call_back) GC_PROTO((void));
|
| 1365 |
|
|
/* Called at start of full collections. */
|
| 1366 |
|
|
/* Not called if 0. Called with allocation */
|
| 1367 |
|
|
/* lock held. */
|
| 1368 |
|
|
/* 0 by default. */
|
| 1369 |
|
|
# if defined(USE_GENERIC_PUSH_REGS)
|
| 1370 |
|
|
void GC_generic_push_regs GC_PROTO((ptr_t cold_gc_frame));
|
| 1371 |
|
|
# else
|
| 1372 |
|
|
void GC_push_regs GC_PROTO((void));
|
| 1373 |
|
|
# endif
|
| 1374 |
|
|
# if defined(SPARC) || defined(IA64)
|
| 1375 |
|
|
/* Cause all stacked registers to be saved in memory. Return a */
|
| 1376 |
|
|
/* pointer to the top of the corresponding memory stack. */
|
| 1377 |
|
|
word GC_save_regs_in_stack GC_PROTO((void));
|
| 1378 |
|
|
# endif
|
| 1379 |
|
|
/* Push register contents onto mark stack. */
|
| 1380 |
|
|
/* If NURSERY is defined, the default push */
|
| 1381 |
|
|
/* action can be overridden with GC_push_proc */
|
| 1382 |
|
|
|
| 1383 |
|
|
# ifdef NURSERY
|
| 1384 |
|
|
extern void (*GC_push_proc)(ptr_t);
|
| 1385 |
|
|
# endif
|
| 1386 |
|
|
# if defined(MSWIN32) || defined(MSWINCE)
|
| 1387 |
|
|
void __cdecl GC_push_one GC_PROTO((word p));
|
| 1388 |
|
|
# else
|
| 1389 |
|
|
void GC_push_one GC_PROTO((word p));
|
| 1390 |
|
|
/* If p points to an object, mark it */
|
| 1391 |
|
|
/* and push contents on the mark stack */
|
| 1392 |
|
|
/* Pointer recognition test always */
|
| 1393 |
|
|
/* accepts interior pointers, i.e. this */
|
| 1394 |
|
|
/* is appropriate for pointers found on */
|
| 1395 |
|
|
/* stack. */
|
| 1396 |
|
|
# endif
|
| 1397 |
|
|
# if defined(PRINT_BLACK_LIST) || defined(KEEP_BACK_PTRS)
|
| 1398 |
|
|
void GC_mark_and_push_stack GC_PROTO((word p, ptr_t source));
|
| 1399 |
|
|
/* Ditto, omits plausibility test */
|
| 1400 |
|
|
# else
|
| 1401 |
|
|
void GC_mark_and_push_stack GC_PROTO((word p));
|
| 1402 |
|
|
# endif
|
| 1403 |
|
|
void GC_push_marked GC_PROTO((struct hblk * h, hdr * hhdr));
|
| 1404 |
|
|
/* Push contents of all marked objects in h onto */
|
| 1405 |
|
|
/* mark stack. */
|
| 1406 |
|
|
#ifdef SMALL_CONFIG
|
| 1407 |
|
|
# define GC_push_next_marked_dirty(h) GC_push_next_marked(h)
|
| 1408 |
|
|
#else
|
| 1409 |
|
|
struct hblk * GC_push_next_marked_dirty GC_PROTO((struct hblk * h));
|
| 1410 |
|
|
/* Invoke GC_push_marked on next dirty block above h. */
|
| 1411 |
|
|
/* Return a pointer just past the end of this block. */
|
| 1412 |
|
|
#endif /* !SMALL_CONFIG */
|
| 1413 |
|
|
struct hblk * GC_push_next_marked GC_PROTO((struct hblk * h));
|
| 1414 |
|
|
/* Ditto, but also mark from clean pages. */
|
| 1415 |
|
|
struct hblk * GC_push_next_marked_uncollectable GC_PROTO((struct hblk * h));
|
| 1416 |
|
|
/* Ditto, but mark only from uncollectable pages. */
|
| 1417 |
|
|
GC_bool GC_stopped_mark GC_PROTO((GC_stop_func stop_func));
|
| 1418 |
|
|
/* Stop world and mark from all roots */
|
| 1419 |
|
|
/* and rescuers. */
|
| 1420 |
|
|
void GC_clear_hdr_marks GC_PROTO((hdr * hhdr));
|
| 1421 |
|
|
/* Clear the mark bits in a header */
|
| 1422 |
|
|
void GC_set_hdr_marks GC_PROTO((hdr * hhdr));
|
| 1423 |
|
|
/* Set the mark bits in a header */
|
| 1424 |
|
|
void GC_set_fl_marks GC_PROTO((ptr_t p));
|
| 1425 |
|
|
/* Set all mark bits associated with */
|
| 1426 |
|
|
/* a free list. */
|
| 1427 |
|
|
void GC_add_roots_inner GC_PROTO((char * b, char * e, GC_bool tmp));
|
| 1428 |
|
|
void GC_remove_roots_inner GC_PROTO((char * b, char * e));
|
| 1429 |
|
|
GC_bool GC_is_static_root GC_PROTO((ptr_t p));
|
| 1430 |
|
|
/* Is the address p in one of the registered static */
|
| 1431 |
|
|
/* root sections? */
|
| 1432 |
|
|
# if defined(MSWIN32) || defined(_WIN32_WCE_EMULATION)
|
| 1433 |
|
|
GC_bool GC_is_tmp_root GC_PROTO((ptr_t p));
|
| 1434 |
|
|
/* Is the address p in one of the temporary static */
|
| 1435 |
|
|
/* root sections? */
|
| 1436 |
|
|
# endif
|
| 1437 |
|
|
void GC_register_dynamic_libraries GC_PROTO((void));
|
| 1438 |
|
|
/* Add dynamic library data sections to the root set. */
|
| 1439 |
|
|
|
| 1440 |
|
|
GC_bool GC_register_main_static_data GC_PROTO((void));
|
| 1441 |
|
|
/* We need to register the main data segment. Returns */
|
| 1442 |
|
|
/* TRUE unless this is done implicitly as part of */
|
| 1443 |
|
|
/* dynamic library registration. */
|
| 1444 |
|
|
|
| 1445 |
|
|
/* Machine dependent startup routines */
|
| 1446 |
|
|
ptr_t GC_get_stack_base GC_PROTO((void)); /* Cold end of stack */
|
| 1447 |
|
|
#ifdef IA64
|
| 1448 |
|
|
ptr_t GC_get_register_stack_base GC_PROTO((void));
|
| 1449 |
|
|
/* Cold end of register stack. */
|
| 1450 |
|
|
#endif
|
| 1451 |
|
|
void GC_register_data_segments GC_PROTO((void));
|
| 1452 |
|
|
|
| 1453 |
|
|
/* Black listing: */
|
| 1454 |
|
|
void GC_bl_init GC_PROTO((void));
|
| 1455 |
|
|
# ifdef PRINT_BLACK_LIST
|
| 1456 |
|
|
void GC_add_to_black_list_normal GC_PROTO((word p, ptr_t source));
|
| 1457 |
|
|
/* Register bits as a possible future false */
|
| 1458 |
|
|
/* reference from the heap or static data */
|
| 1459 |
|
|
# define GC_ADD_TO_BLACK_LIST_NORMAL(bits, source) \
|
| 1460 |
|
|
if (GC_all_interior_pointers) { \
|
| 1461 |
|
|
GC_add_to_black_list_stack(bits, (ptr_t)(source)); \
|
| 1462 |
|
|
} else { \
|
| 1463 |
|
|
GC_add_to_black_list_normal(bits, (ptr_t)(source)); \
|
| 1464 |
|
|
}
|
| 1465 |
|
|
# else
|
| 1466 |
|
|
void GC_add_to_black_list_normal GC_PROTO((word p));
|
| 1467 |
|
|
# define GC_ADD_TO_BLACK_LIST_NORMAL(bits, source) \
|
| 1468 |
|
|
if (GC_all_interior_pointers) { \
|
| 1469 |
|
|
GC_add_to_black_list_stack(bits); \
|
| 1470 |
|
|
} else { \
|
| 1471 |
|
|
GC_add_to_black_list_normal(bits); \
|
| 1472 |
|
|
}
|
| 1473 |
|
|
# endif
|
| 1474 |
|
|
|
| 1475 |
|
|
# ifdef PRINT_BLACK_LIST
|
| 1476 |
|
|
void GC_add_to_black_list_stack GC_PROTO((word p, ptr_t source));
|
| 1477 |
|
|
# else
|
| 1478 |
|
|
void GC_add_to_black_list_stack GC_PROTO((word p));
|
| 1479 |
|
|
# endif
|
| 1480 |
|
|
struct hblk * GC_is_black_listed GC_PROTO((struct hblk * h, word len));
|
| 1481 |
|
|
/* If there are likely to be false references */
|
| 1482 |
|
|
/* to a block starting at h of the indicated */
|
| 1483 |
|
|
/* length, then return the next plausible */
|
| 1484 |
|
|
/* starting location for h that might avoid */
|
| 1485 |
|
|
/* these false references. */
|
| 1486 |
|
|
void GC_promote_black_lists GC_PROTO((void));
|
| 1487 |
|
|
/* Declare an end to a black listing phase. */
|
| 1488 |
|
|
void GC_unpromote_black_lists GC_PROTO((void));
|
| 1489 |
|
|
/* Approximately undo the effect of the above. */
|
| 1490 |
|
|
/* This actually loses some information, but */
|
| 1491 |
|
|
/* only in a reasonably safe way. */
|
| 1492 |
|
|
word GC_number_stack_black_listed GC_PROTO(( \
|
| 1493 |
|
|
struct hblk *start, struct hblk *endp1));
|
| 1494 |
|
|
/* Return the number of (stack) blacklisted */
|
| 1495 |
|
|
/* blocks in the range for statistical */
|
| 1496 |
|
|
/* purposes. */
|
| 1497 |
|
|
|
| 1498 |
|
|
ptr_t GC_scratch_alloc GC_PROTO((word bytes));
|
| 1499 |
|
|
/* GC internal memory allocation for */
|
| 1500 |
|
|
/* small objects. Deallocation is not */
|
| 1501 |
|
|
/* possible. */
|
| 1502 |
|
|
|
| 1503 |
|
|
/* Heap block layout maps: */
|
| 1504 |
|
|
void GC_invalidate_map GC_PROTO((hdr * hhdr));
|
| 1505 |
|
|
/* Remove the object map associated */
|
| 1506 |
|
|
/* with the block. This identifies */
|
| 1507 |
|
|
/* the block as invalid to the mark */
|
| 1508 |
|
|
/* routines. */
|
| 1509 |
|
|
GC_bool GC_add_map_entry GC_PROTO((word sz));
|
| 1510 |
|
|
/* Add a heap block map for objects of */
|
| 1511 |
|
|
/* size sz to obj_map. */
|
| 1512 |
|
|
/* Return FALSE on failure. */
|
| 1513 |
|
|
void GC_register_displacement_inner GC_PROTO((word offset));
|
| 1514 |
|
|
/* Version of GC_register_displacement */
|
| 1515 |
|
|
/* that assumes lock is already held */
|
| 1516 |
|
|
/* and signals are already disabled. */
|
| 1517 |
|
|
|
| 1518 |
|
|
/* hblk allocation: */
|
| 1519 |
|
|
void GC_new_hblk GC_PROTO((word size_in_words, int kind));
|
| 1520 |
|
|
/* Allocate a new heap block, and build */
|
| 1521 |
|
|
/* a free list in it. */
|
| 1522 |
|
|
|
| 1523 |
|
|
ptr_t GC_build_fl GC_PROTO((struct hblk *h, word sz,
|
| 1524 |
|
|
GC_bool clear, ptr_t list));
|
| 1525 |
|
|
/* Build a free list for objects of */
|
| 1526 |
|
|
/* size sz in block h. Append list to */
|
| 1527 |
|
|
/* end of the free lists. Possibly */
|
| 1528 |
|
|
/* clear objects on the list. Normally */
|
| 1529 |
|
|
/* called by GC_new_hblk, but also */
|
| 1530 |
|
|
/* called explicitly without GC lock. */
|
| 1531 |
|
|
|
| 1532 |
|
|
struct hblk * GC_allochblk GC_PROTO(( \
|
| 1533 |
|
|
word size_in_words, int kind, unsigned flags));
|
| 1534 |
|
|
/* Allocate a heap block, inform */
|
| 1535 |
|
|
/* the marker that block is valid */
|
| 1536 |
|
|
/* for objects of indicated size. */
|
| 1537 |
|
|
|
| 1538 |
|
|
ptr_t GC_alloc_large GC_PROTO((word lw, int k, unsigned flags));
|
| 1539 |
|
|
/* Allocate a large block of size lw words. */
|
| 1540 |
|
|
/* The block is not cleared. */
|
| 1541 |
|
|
/* Flags is 0 or IGNORE_OFF_PAGE. */
|
| 1542 |
|
|
/* Calls GC_allchblk to do the actual */
|
| 1543 |
|
|
/* allocation, but also triggers GC and/or */
|
| 1544 |
|
|
/* heap expansion as appropriate. */
|
| 1545 |
|
|
/* Does not update GC_words_allocd, but does */
|
| 1546 |
|
|
/* other accounting. */
|
| 1547 |
|
|
|
| 1548 |
|
|
ptr_t GC_alloc_large_and_clear GC_PROTO((word lw, int k, unsigned flags));
|
| 1549 |
|
|
/* As above, but clear block if appropriate */
|
| 1550 |
|
|
/* for kind k. */
|
| 1551 |
|
|
|
| 1552 |
|
|
void GC_freehblk GC_PROTO((struct hblk * p));
|
| 1553 |
|
|
/* Deallocate a heap block and mark it */
|
| 1554 |
|
|
/* as invalid. */
|
| 1555 |
|
|
|
| 1556 |
|
|
/* Misc GC: */
|
| 1557 |
|
|
void GC_init_inner GC_PROTO((void));
|
| 1558 |
|
|
GC_bool GC_expand_hp_inner GC_PROTO((word n));
|
| 1559 |
|
|
void GC_start_reclaim GC_PROTO((int abort_if_found));
|
| 1560 |
|
|
/* Restore unmarked objects to free */
|
| 1561 |
|
|
/* lists, or (if abort_if_found is */
|
| 1562 |
|
|
/* TRUE) report them. */
|
| 1563 |
|
|
/* Sweeping of small object pages is */
|
| 1564 |
|
|
/* largely deferred. */
|
| 1565 |
|
|
void GC_continue_reclaim GC_PROTO((word sz, int kind));
|
| 1566 |
|
|
/* Sweep pages of the given size and */
|
| 1567 |
|
|
/* kind, as long as possible, and */
|
| 1568 |
|
|
/* as long as the corr. free list is */
|
| 1569 |
|
|
/* empty. */
|
| 1570 |
|
|
void GC_reclaim_or_delete_all GC_PROTO((void));
|
| 1571 |
|
|
/* Arrange for all reclaim lists to be */
|
| 1572 |
|
|
/* empty. Judiciously choose between */
|
| 1573 |
|
|
/* sweeping and discarding each page. */
|
| 1574 |
|
|
GC_bool GC_reclaim_all GC_PROTO((GC_stop_func stop_func, GC_bool ignore_old));
|
| 1575 |
|
|
/* Reclaim all blocks. Abort (in a */
|
| 1576 |
|
|
/* consistent state) if f returns TRUE. */
|
| 1577 |
|
|
GC_bool GC_block_empty GC_PROTO((hdr * hhdr));
|
| 1578 |
|
|
/* Block completely unmarked? */
|
| 1579 |
|
|
GC_bool GC_never_stop_func GC_PROTO((void));
|
| 1580 |
|
|
/* Returns FALSE. */
|
| 1581 |
|
|
GC_bool GC_try_to_collect_inner GC_PROTO((GC_stop_func f));
|
| 1582 |
|
|
|
| 1583 |
|
|
/* Collect; caller must have acquired */
|
| 1584 |
|
|
/* lock and disabled signals. */
|
| 1585 |
|
|
/* Collection is aborted if f returns */
|
| 1586 |
|
|
/* TRUE. Returns TRUE if it completes */
|
| 1587 |
|
|
/* successfully. */
|
| 1588 |
|
|
# define GC_gcollect_inner() \
|
| 1589 |
|
|
(void) GC_try_to_collect_inner(GC_never_stop_func)
|
| 1590 |
|
|
void GC_finish_collection GC_PROTO((void));
|
| 1591 |
|
|
/* Finish collection. Mark bits are */
|
| 1592 |
|
|
/* consistent and lock is still held. */
|
| 1593 |
|
|
GC_bool GC_collect_or_expand GC_PROTO(( \
|
| 1594 |
|
|
word needed_blocks, GC_bool ignore_off_page));
|
| 1595 |
|
|
/* Collect or expand heap in an attempt */
|
| 1596 |
|
|
/* make the indicated number of free */
|
| 1597 |
|
|
/* blocks available. Should be called */
|
| 1598 |
|
|
/* until the blocks are available or */
|
| 1599 |
|
|
/* until it fails by returning FALSE. */
|
| 1600 |
|
|
|
| 1601 |
|
|
extern GC_bool GC_is_initialized; /* GC_init() has been run. */
|
| 1602 |
|
|
|
| 1603 |
|
|
#if defined(MSWIN32) || defined(MSWINCE)
|
| 1604 |
|
|
void GC_deinit GC_PROTO((void));
|
| 1605 |
|
|
/* Free any resources allocated by */
|
| 1606 |
|
|
/* GC_init */
|
| 1607 |
|
|
#endif
|
| 1608 |
|
|
|
| 1609 |
|
|
void GC_collect_a_little_inner GC_PROTO((int n));
|
| 1610 |
|
|
/* Do n units worth of garbage */
|
| 1611 |
|
|
/* collection work, if appropriate. */
|
| 1612 |
|
|
/* A unit is an amount appropriate for */
|
| 1613 |
|
|
/* HBLKSIZE bytes of allocation. */
|
| 1614 |
|
|
/* ptr_t GC_generic_malloc GC_PROTO((word lb, int k)); */
|
| 1615 |
|
|
/* Allocate an object of the given */
|
| 1616 |
|
|
/* kind. By default, there are only */
|
| 1617 |
|
|
/* a few kinds: composite(pointerfree), */
|
| 1618 |
|
|
/* atomic, uncollectable, etc. */
|
| 1619 |
|
|
/* We claim it's possible for clever */
|
| 1620 |
|
|
/* client code that understands GC */
|
| 1621 |
|
|
/* internals to add more, e.g. to */
|
| 1622 |
|
|
/* communicate object layout info */
|
| 1623 |
|
|
/* to the collector. */
|
| 1624 |
|
|
/* The actual decl is in gc_mark.h. */
|
| 1625 |
|
|
ptr_t GC_generic_malloc_ignore_off_page GC_PROTO((size_t b, int k));
|
| 1626 |
|
|
/* As above, but pointers past the */
|
| 1627 |
|
|
/* first page of the resulting object */
|
| 1628 |
|
|
/* are ignored. */
|
| 1629 |
|
|
ptr_t GC_generic_malloc_inner GC_PROTO((word lb, int k));
|
| 1630 |
|
|
/* Ditto, but I already hold lock, etc. */
|
| 1631 |
|
|
ptr_t GC_generic_malloc_words_small_inner GC_PROTO((word lw, int k));
|
| 1632 |
|
|
/* Analogous to the above, but assumes */
|
| 1633 |
|
|
/* a small object size, and bypasses */
|
| 1634 |
|
|
/* MERGE_SIZES mechanism. */
|
| 1635 |
|
|
ptr_t GC_generic_malloc_words_small GC_PROTO((size_t lw, int k));
|
| 1636 |
|
|
/* As above, but size in units of words */
|
| 1637 |
|
|
/* Bypasses MERGE_SIZES. Assumes */
|
| 1638 |
|
|
/* words <= MAXOBJSZ. */
|
| 1639 |
|
|
ptr_t GC_generic_malloc_inner_ignore_off_page GC_PROTO((size_t lb, int k));
|
| 1640 |
|
|
/* Allocate an object, where */
|
| 1641 |
|
|
/* the client guarantees that there */
|
| 1642 |
|
|
/* will always be a pointer to the */
|
| 1643 |
|
|
/* beginning of the object while the */
|
| 1644 |
|
|
/* object is live. */
|
| 1645 |
|
|
ptr_t GC_allocobj GC_PROTO((word sz, int kind));
|
| 1646 |
|
|
/* Make the indicated */
|
| 1647 |
|
|
/* free list nonempty, and return its */
|
| 1648 |
|
|
/* head. */
|
| 1649 |
|
|
|
| 1650 |
|
|
void GC_free_inner(GC_PTR p);
|
| 1651 |
|
|
|
| 1652 |
|
|
void GC_init_headers GC_PROTO((void));
|
| 1653 |
|
|
struct hblkhdr * GC_install_header GC_PROTO((struct hblk *h));
|
| 1654 |
|
|
/* Install a header for block h. */
|
| 1655 |
|
|
/* Return 0 on failure, or the header */
|
| 1656 |
|
|
/* otherwise. */
|
| 1657 |
|
|
GC_bool GC_install_counts GC_PROTO((struct hblk * h, word sz));
|
| 1658 |
|
|
/* Set up forwarding counts for block */
|
| 1659 |
|
|
/* h of size sz. */
|
| 1660 |
|
|
/* Return FALSE on failure. */
|
| 1661 |
|
|
void GC_remove_header GC_PROTO((struct hblk * h));
|
| 1662 |
|
|
/* Remove the header for block h. */
|
| 1663 |
|
|
void GC_remove_counts GC_PROTO((struct hblk * h, word sz));
|
| 1664 |
|
|
/* Remove forwarding counts for h. */
|
| 1665 |
|
|
hdr * GC_find_header GC_PROTO((ptr_t h)); /* Debugging only. */
|
| 1666 |
|
|
|
| 1667 |
|
|
void GC_finalize GC_PROTO((void));
|
| 1668 |
|
|
/* Perform all indicated finalization actions */
|
| 1669 |
|
|
/* on unmarked objects. */
|
| 1670 |
|
|
/* Unreachable finalizable objects are enqueued */
|
| 1671 |
|
|
/* for processing by GC_invoke_finalizers. */
|
| 1672 |
|
|
/* Invoked with lock. */
|
| 1673 |
|
|
|
| 1674 |
|
|
void GC_notify_or_invoke_finalizers GC_PROTO((void));
|
| 1675 |
|
|
/* If GC_finalize_on_demand is not set, invoke */
|
| 1676 |
|
|
/* eligible finalizers. Otherwise: */
|
| 1677 |
|
|
/* Call *GC_finalizer_notifier if there are */
|
| 1678 |
|
|
/* finalizers to be run, and we haven't called */
|
| 1679 |
|
|
/* this procedure yet this GC cycle. */
|
| 1680 |
|
|
|
| 1681 |
|
|
GC_API GC_PTR GC_make_closure GC_PROTO((GC_finalization_proc fn, GC_PTR data));
|
| 1682 |
|
|
GC_API void GC_debug_invoke_finalizer GC_PROTO((GC_PTR obj, GC_PTR data));
|
| 1683 |
|
|
/* Auxiliary fns to make finalization work */
|
| 1684 |
|
|
/* correctly with displaced pointers introduced */
|
| 1685 |
|
|
/* by the debugging allocators. */
|
| 1686 |
|
|
|
| 1687 |
|
|
void GC_add_to_heap GC_PROTO((struct hblk *p, word bytes));
|
| 1688 |
|
|
/* Add a HBLKSIZE aligned chunk to the heap. */
|
| 1689 |
|
|
|
| 1690 |
|
|
void GC_print_obj GC_PROTO((ptr_t p));
|
| 1691 |
|
|
/* P points to somewhere inside an object with */
|
| 1692 |
|
|
/* debugging info. Print a human readable */
|
| 1693 |
|
|
/* description of the object to stderr. */
|
| 1694 |
|
|
extern void (*GC_check_heap) GC_PROTO((void));
|
| 1695 |
|
|
/* Check that all objects in the heap with */
|
| 1696 |
|
|
/* debugging info are intact. */
|
| 1697 |
|
|
/* Add any that are not to GC_smashed list. */
|
| 1698 |
|
|
extern void (*GC_print_all_smashed) GC_PROTO((void));
|
| 1699 |
|
|
/* Print GC_smashed if it's not empty. */
|
| 1700 |
|
|
/* Clear GC_smashed list. */
|
| 1701 |
|
|
extern void GC_print_all_errors GC_PROTO((void));
|
| 1702 |
|
|
/* Print smashed and leaked objects, if any. */
|
| 1703 |
|
|
/* Clear the lists of such objects. */
|
| 1704 |
|
|
extern void (*GC_print_heap_obj) GC_PROTO((ptr_t p));
|
| 1705 |
|
|
/* If possible print s followed by a more */
|
| 1706 |
|
|
/* detailed description of the object */
|
| 1707 |
|
|
/* referred to by p. */
|
| 1708 |
|
|
#if defined(LINUX) && defined(__ELF__) && !defined(SMALL_CONFIG)
|
| 1709 |
|
|
void GC_print_address_map GC_PROTO((void));
|
| 1710 |
|
|
/* Print an address map of the process. */
|
| 1711 |
|
|
#endif
|
| 1712 |
|
|
|
| 1713 |
|
|
extern GC_bool GC_have_errors; /* We saw a smashed or leaked object. */
|
| 1714 |
|
|
/* Call error printing routine */
|
| 1715 |
|
|
/* occasionally. */
|
| 1716 |
|
|
extern GC_bool GC_print_stats; /* Produce at least some logging output */
|
| 1717 |
|
|
/* Set from environment variable. */
|
| 1718 |
|
|
|
| 1719 |
|
|
#ifndef NO_DEBUGGING
|
| 1720 |
|
|
extern GC_bool GC_dump_regularly; /* Generate regular debugging dumps. */
|
| 1721 |
|
|
# define COND_DUMP if (GC_dump_regularly) GC_dump();
|
| 1722 |
|
|
#else
|
| 1723 |
|
|
# define COND_DUMP
|
| 1724 |
|
|
#endif
|
| 1725 |
|
|
|
| 1726 |
|
|
#ifdef KEEP_BACK_PTRS
|
| 1727 |
|
|
extern long GC_backtraces;
|
| 1728 |
|
|
void GC_generate_random_backtrace_no_gc(void);
|
| 1729 |
|
|
#endif
|
| 1730 |
|
|
|
| 1731 |
|
|
extern GC_bool GC_print_back_height;
|
| 1732 |
|
|
|
| 1733 |
|
|
#ifdef MAKE_BACK_GRAPH
|
| 1734 |
|
|
void GC_print_back_graph_stats(void);
|
| 1735 |
|
|
#endif
|
| 1736 |
|
|
|
| 1737 |
|
|
/* Macros used for collector internal allocation. */
|
| 1738 |
|
|
/* These assume the collector lock is held. */
|
| 1739 |
|
|
#ifdef DBG_HDRS_ALL
|
| 1740 |
|
|
extern GC_PTR GC_debug_generic_malloc_inner(size_t lb, int k);
|
| 1741 |
|
|
extern GC_PTR GC_debug_generic_malloc_inner_ignore_off_page(size_t lb,
|
| 1742 |
|
|
int k);
|
| 1743 |
|
|
# define GC_INTERNAL_MALLOC GC_debug_generic_malloc_inner
|
| 1744 |
|
|
# define GC_INTERNAL_MALLOC_IGNORE_OFF_PAGE \
|
| 1745 |
|
|
GC_debug_generic_malloc_inner_ignore_off_page
|
| 1746 |
|
|
# ifdef THREADS
|
| 1747 |
|
|
# define GC_INTERNAL_FREE GC_debug_free_inner
|
| 1748 |
|
|
# else
|
| 1749 |
|
|
# define GC_INTERNAL_FREE GC_debug_free
|
| 1750 |
|
|
# endif
|
| 1751 |
|
|
#else
|
| 1752 |
|
|
# define GC_INTERNAL_MALLOC GC_generic_malloc_inner
|
| 1753 |
|
|
# define GC_INTERNAL_MALLOC_IGNORE_OFF_PAGE \
|
| 1754 |
|
|
GC_generic_malloc_inner_ignore_off_page
|
| 1755 |
|
|
# ifdef THREADS
|
| 1756 |
|
|
# define GC_INTERNAL_FREE GC_free_inner
|
| 1757 |
|
|
# else
|
| 1758 |
|
|
# define GC_INTERNAL_FREE GC_free
|
| 1759 |
|
|
# endif
|
| 1760 |
|
|
#endif
|
| 1761 |
|
|
|
| 1762 |
|
|
/* Memory unmapping: */
|
| 1763 |
|
|
#ifdef USE_MUNMAP
|
| 1764 |
|
|
void GC_unmap_old(void);
|
| 1765 |
|
|
void GC_merge_unmapped(void);
|
| 1766 |
|
|
void GC_unmap(ptr_t start, word bytes);
|
| 1767 |
|
|
void GC_remap(ptr_t start, word bytes);
|
| 1768 |
|
|
void GC_unmap_gap(ptr_t start1, word bytes1, ptr_t start2, word bytes2);
|
| 1769 |
|
|
#endif
|
| 1770 |
|
|
|
| 1771 |
|
|
/* Virtual dirty bit implementation: */
|
| 1772 |
|
|
/* Each implementation exports the following: */
|
| 1773 |
|
|
void GC_read_dirty GC_PROTO((void));
|
| 1774 |
|
|
/* Retrieve dirty bits. */
|
| 1775 |
|
|
GC_bool GC_page_was_dirty GC_PROTO((struct hblk *h));
|
| 1776 |
|
|
/* Read retrieved dirty bits. */
|
| 1777 |
|
|
GC_bool GC_page_was_ever_dirty GC_PROTO((struct hblk *h));
|
| 1778 |
|
|
/* Could the page contain valid heap pointers? */
|
| 1779 |
|
|
void GC_is_fresh GC_PROTO((struct hblk *h, word n));
|
| 1780 |
|
|
/* Assert the region currently contains no */
|
| 1781 |
|
|
/* valid pointers. */
|
| 1782 |
|
|
void GC_remove_protection GC_PROTO((struct hblk *h, word nblocks,
|
| 1783 |
|
|
GC_bool pointerfree));
|
| 1784 |
|
|
/* h is about to be writteni or allocated. Ensure */
|
| 1785 |
|
|
/* that it's not write protected by the virtual */
|
| 1786 |
|
|
/* dirty bit implementation. */
|
| 1787 |
|
|
|
| 1788 |
|
|
void GC_dirty_init GC_PROTO((void));
|
| 1789 |
|
|
|
| 1790 |
|
|
/* Slow/general mark bit manipulation: */
|
| 1791 |
|
|
GC_API GC_bool GC_is_marked GC_PROTO((ptr_t p));
|
| 1792 |
|
|
void GC_clear_mark_bit GC_PROTO((ptr_t p));
|
| 1793 |
|
|
void GC_set_mark_bit GC_PROTO((ptr_t p));
|
| 1794 |
|
|
|
| 1795 |
|
|
/* Stubborn objects: */
|
| 1796 |
|
|
void GC_read_changed GC_PROTO((void)); /* Analogous to GC_read_dirty */
|
| 1797 |
|
|
GC_bool GC_page_was_changed GC_PROTO((struct hblk * h));
|
| 1798 |
|
|
/* Analogous to GC_page_was_dirty */
|
| 1799 |
|
|
void GC_clean_changing_list GC_PROTO((void));
|
| 1800 |
|
|
/* Collect obsolete changing list entries */
|
| 1801 |
|
|
void GC_stubborn_init GC_PROTO((void));
|
| 1802 |
|
|
|
| 1803 |
|
|
/* Debugging print routines: */
|
| 1804 |
|
|
void GC_print_block_list GC_PROTO((void));
|
| 1805 |
|
|
void GC_print_hblkfreelist GC_PROTO((void));
|
| 1806 |
|
|
void GC_print_heap_sects GC_PROTO((void));
|
| 1807 |
|
|
void GC_print_static_roots GC_PROTO((void));
|
| 1808 |
|
|
void GC_print_finalization_stats GC_PROTO((void));
|
| 1809 |
|
|
void GC_dump GC_PROTO((void));
|
| 1810 |
|
|
|
| 1811 |
|
|
#ifdef KEEP_BACK_PTRS
|
| 1812 |
|
|
void GC_store_back_pointer(ptr_t source, ptr_t dest);
|
| 1813 |
|
|
void GC_marked_for_finalization(ptr_t dest);
|
| 1814 |
|
|
# define GC_STORE_BACK_PTR(source, dest) GC_store_back_pointer(source, dest)
|
| 1815 |
|
|
# define GC_MARKED_FOR_FINALIZATION(dest) GC_marked_for_finalization(dest)
|
| 1816 |
|
|
#else
|
| 1817 |
|
|
# define GC_STORE_BACK_PTR(source, dest)
|
| 1818 |
|
|
# define GC_MARKED_FOR_FINALIZATION(dest)
|
| 1819 |
|
|
#endif
|
| 1820 |
|
|
|
| 1821 |
|
|
/* Make arguments appear live to compiler */
|
| 1822 |
|
|
# ifdef __WATCOMC__
|
| 1823 |
|
|
void GC_noop(void*, ...);
|
| 1824 |
|
|
# else
|
| 1825 |
|
|
# ifdef __DMC__
|
| 1826 |
|
|
GC_API void GC_noop(...);
|
| 1827 |
|
|
# else
|
| 1828 |
|
|
GC_API void GC_noop();
|
| 1829 |
|
|
# endif
|
| 1830 |
|
|
# endif
|
| 1831 |
|
|
|
| 1832 |
|
|
void GC_noop1 GC_PROTO((word));
|
| 1833 |
|
|
|
| 1834 |
|
|
/* Logging and diagnostic output: */
|
| 1835 |
|
|
GC_API void GC_printf GC_PROTO((GC_CONST char * format, long, long, long, long, long, long));
|
| 1836 |
|
|
/* A version of printf that doesn't allocate, */
|
| 1837 |
|
|
/* is restricted to long arguments, and */
|
| 1838 |
|
|
/* (unfortunately) doesn't use varargs for */
|
| 1839 |
|
|
/* portability. Restricted to 6 args and */
|
| 1840 |
|
|
/* 1K total output length. */
|
| 1841 |
|
|
/* (We use sprintf. Hopefully that doesn't */
|
| 1842 |
|
|
/* allocate for long arguments.) */
|
| 1843 |
|
|
# define GC_printf0(f) GC_printf(f, 0l, 0l, 0l, 0l, 0l, 0l)
|
| 1844 |
|
|
# define GC_printf1(f,a) GC_printf(f, (long)a, 0l, 0l, 0l, 0l, 0l)
|
| 1845 |
|
|
# define GC_printf2(f,a,b) GC_printf(f, (long)a, (long)b, 0l, 0l, 0l, 0l)
|
| 1846 |
|
|
# define GC_printf3(f,a,b,c) GC_printf(f, (long)a, (long)b, (long)c, 0l, 0l, 0l)
|
| 1847 |
|
|
# define GC_printf4(f,a,b,c,d) GC_printf(f, (long)a, (long)b, (long)c, \
|
| 1848 |
|
|
(long)d, 0l, 0l)
|
| 1849 |
|
|
# define GC_printf5(f,a,b,c,d,e) GC_printf(f, (long)a, (long)b, (long)c, \
|
| 1850 |
|
|
(long)d, (long)e, 0l)
|
| 1851 |
|
|
# define GC_printf6(f,a,b,c,d,e,g) GC_printf(f, (long)a, (long)b, (long)c, \
|
| 1852 |
|
|
(long)d, (long)e, (long)g)
|
| 1853 |
|
|
|
| 1854 |
|
|
GC_API void GC_err_printf GC_PROTO((GC_CONST char * format, long, long, long, long, long, long));
|
| 1855 |
|
|
# define GC_err_printf0(f) GC_err_puts(f)
|
| 1856 |
|
|
# define GC_err_printf1(f,a) GC_err_printf(f, (long)a, 0l, 0l, 0l, 0l, 0l)
|
| 1857 |
|
|
# define GC_err_printf2(f,a,b) GC_err_printf(f, (long)a, (long)b, 0l, 0l, 0l, 0l)
|
| 1858 |
|
|
# define GC_err_printf3(f,a,b,c) GC_err_printf(f, (long)a, (long)b, (long)c, \
|
| 1859 |
|
|
0l, 0l, 0l)
|
| 1860 |
|
|
# define GC_err_printf4(f,a,b,c,d) GC_err_printf(f, (long)a, (long)b, \
|
| 1861 |
|
|
(long)c, (long)d, 0l, 0l)
|
| 1862 |
|
|
# define GC_err_printf5(f,a,b,c,d,e) GC_err_printf(f, (long)a, (long)b, \
|
| 1863 |
|
|
(long)c, (long)d, \
|
| 1864 |
|
|
(long)e, 0l)
|
| 1865 |
|
|
# define GC_err_printf6(f,a,b,c,d,e,g) GC_err_printf(f, (long)a, (long)b, \
|
| 1866 |
|
|
(long)c, (long)d, \
|
| 1867 |
|
|
(long)e, (long)g)
|
| 1868 |
|
|
/* Ditto, writes to stderr. */
|
| 1869 |
|
|
|
| 1870 |
|
|
void GC_err_puts GC_PROTO((GC_CONST char *s));
|
| 1871 |
|
|
/* Write s to stderr, don't buffer, don't add */
|
| 1872 |
|
|
/* newlines, don't ... */
|
| 1873 |
|
|
|
| 1874 |
|
|
#if defined(LINUX) && !defined(SMALL_CONFIG)
|
| 1875 |
|
|
void GC_err_write GC_PROTO((GC_CONST char *buf, size_t len));
|
| 1876 |
|
|
/* Write buf to stderr, don't buffer, don't add */
|
| 1877 |
|
|
/* newlines, don't ... */
|
| 1878 |
|
|
#endif
|
| 1879 |
|
|
|
| 1880 |
|
|
|
| 1881 |
|
|
# ifdef GC_ASSERTIONS
|
| 1882 |
|
|
# define GC_ASSERT(expr) if(!(expr)) {\
|
| 1883 |
|
|
GC_err_printf2("Assertion failure: %s:%ld\n", \
|
| 1884 |
|
|
__FILE__, (unsigned long)__LINE__); \
|
| 1885 |
|
|
ABORT("assertion failure"); }
|
| 1886 |
|
|
# else
|
| 1887 |
|
|
# define GC_ASSERT(expr)
|
| 1888 |
|
|
# endif
|
| 1889 |
|
|
|
| 1890 |
|
|
/* Check a compile time assertion at compile time. The error */
|
| 1891 |
|
|
/* message for failure is a bit baroque, but ... */
|
| 1892 |
|
|
#if defined(mips) && !defined(__GNUC__)
|
| 1893 |
|
|
/* DOB: MIPSPro C gets an internal error taking the sizeof an array type.
|
| 1894 |
|
|
This code works correctly (ugliness is to avoid "unused var" warnings) */
|
| 1895 |
|
|
# define GC_STATIC_ASSERT(expr) do { if (0) { char j[(expr)? 1 : -1]; j[0]='\0'; j[0]=j[0]; } } while(0)
|
| 1896 |
|
|
#else
|
| 1897 |
|
|
# define GC_STATIC_ASSERT(expr) sizeof(char[(expr)? 1 : -1])
|
| 1898 |
|
|
#endif
|
| 1899 |
|
|
|
| 1900 |
|
|
# if defined(PARALLEL_MARK) || defined(THREAD_LOCAL_ALLOC)
|
| 1901 |
|
|
/* We need additional synchronization facilities from the thread */
|
| 1902 |
|
|
/* support. We believe these are less performance critical */
|
| 1903 |
|
|
/* than the main garbage collector lock; standard pthreads-based */
|
| 1904 |
|
|
/* implementations should be sufficient. */
|
| 1905 |
|
|
|
| 1906 |
|
|
/* The mark lock and condition variable. If the GC lock is also */
|
| 1907 |
|
|
/* acquired, the GC lock must be acquired first. The mark lock is */
|
| 1908 |
|
|
/* used to both protect some variables used by the parallel */
|
| 1909 |
|
|
/* marker, and to protect GC_fl_builder_count, below. */
|
| 1910 |
|
|
/* GC_notify_all_marker() is called when */
|
| 1911 |
|
|
/* the state of the parallel marker changes */
|
| 1912 |
|
|
/* in some significant way (see gc_mark.h for details). The */
|
| 1913 |
|
|
/* latter set of events includes incrementing GC_mark_no. */
|
| 1914 |
|
|
/* GC_notify_all_builder() is called when GC_fl_builder_count */
|
| 1915 |
|
|
/* reaches 0. */
|
| 1916 |
|
|
|
| 1917 |
|
|
extern void GC_acquire_mark_lock();
|
| 1918 |
|
|
extern void GC_release_mark_lock();
|
| 1919 |
|
|
extern void GC_notify_all_builder();
|
| 1920 |
|
|
/* extern void GC_wait_builder(); */
|
| 1921 |
|
|
extern void GC_wait_for_reclaim();
|
| 1922 |
|
|
|
| 1923 |
|
|
extern word GC_fl_builder_count; /* Protected by mark lock. */
|
| 1924 |
|
|
# endif /* PARALLEL_MARK || THREAD_LOCAL_ALLOC */
|
| 1925 |
|
|
# ifdef PARALLEL_MARK
|
| 1926 |
|
|
extern void GC_notify_all_marker();
|
| 1927 |
|
|
extern void GC_wait_marker();
|
| 1928 |
|
|
extern word GC_mark_no; /* Protected by mark lock. */
|
| 1929 |
|
|
|
| 1930 |
|
|
extern void GC_help_marker(word my_mark_no);
|
| 1931 |
|
|
/* Try to help out parallel marker for mark cycle */
|
| 1932 |
|
|
/* my_mark_no. Returns if the mark cycle finishes or */
|
| 1933 |
|
|
/* was already done, or there was nothing to do for */
|
| 1934 |
|
|
/* some other reason. */
|
| 1935 |
|
|
# endif /* PARALLEL_MARK */
|
| 1936 |
|
|
|
| 1937 |
|
|
# if defined(GC_PTHREADS) && !defined(GC_SOLARIS_THREADS)
|
| 1938 |
|
|
/* We define the thread suspension signal here, so that we can refer */
|
| 1939 |
|
|
/* to it in the dirty bit implementation, if necessary. Ideally we */
|
| 1940 |
|
|
/* would allocate a (real-time ?) signal using the standard mechanism.*/
|
| 1941 |
|
|
/* unfortunately, there is no standard mechanism. (There is one */
|
| 1942 |
|
|
/* in Linux glibc, but it's not exported.) Thus we continue to use */
|
| 1943 |
|
|
/* the same hard-coded signals we've always used. */
|
| 1944 |
|
|
# if !defined(SIG_SUSPEND)
|
| 1945 |
|
|
# if defined(GC_LINUX_THREADS) || defined(GC_DGUX386_THREADS)
|
| 1946 |
|
|
# if defined(SPARC) && !defined(SIGPWR)
|
| 1947 |
|
|
/* SPARC/Linux doesn't properly define SIGPWR in <signal.h>.
|
| 1948 |
|
|
* It is aliased to SIGLOST in asm/signal.h, though. */
|
| 1949 |
|
|
# define SIG_SUSPEND SIGLOST
|
| 1950 |
|
|
# else
|
| 1951 |
|
|
/* Linuxthreads itself uses SIGUSR1 and SIGUSR2. */
|
| 1952 |
|
|
# define SIG_SUSPEND SIGPWR
|
| 1953 |
|
|
# endif
|
| 1954 |
|
|
# else /* !GC_LINUX_THREADS */
|
| 1955 |
|
|
# if defined(_SIGRTMIN)
|
| 1956 |
|
|
# define SIG_SUSPEND _SIGRTMIN + 6
|
| 1957 |
|
|
# else
|
| 1958 |
|
|
# define SIG_SUSPEND SIGRTMIN + 6
|
| 1959 |
|
|
# endif
|
| 1960 |
|
|
# endif
|
| 1961 |
|
|
# endif /* !SIG_SUSPEND */
|
| 1962 |
|
|
|
| 1963 |
|
|
# endif
|
| 1964 |
|
|
|
| 1965 |
|
|
# endif /* GC_PRIVATE_H */
|
