c62b906422
2003-03-04 Hans Boehm <Hans.Boehm@hp.com> * include/private/gcconfig.h (GC_data_start): declare when needed. * include/private/gc_priv.h: Include gcconfig.h after ptr_t declaration. * dyn_load.c (GC_register_dynamic_libraries_dl_iterate_phdr, GC_register_dynlib_callback): Register main data for static executable if dl_iterate_phdr() didn't. * misc.c (GC_init_inner): Call GC_init_linux_data_start() even if we don't expect to register main static data. From-SVN: r63809
1935 lines
68 KiB
C
1935 lines
68 KiB
C
/*
|
|
* Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
|
|
* Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
|
|
* Copyright (c) 1996-1999 by Silicon Graphics. All rights reserved.
|
|
* Copyright (c) 1999-2001 by Hewlett-Packard Company. All rights reserved.
|
|
*
|
|
*
|
|
* THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
|
|
* OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
|
|
*
|
|
* Permission is hereby granted to use or copy this program
|
|
* for any purpose, provided the above notices are retained on all copies.
|
|
* Permission to modify the code and to distribute modified code is granted,
|
|
* provided the above notices are retained, and a notice that the code was
|
|
* modified is included with the above copyright notice.
|
|
*/
|
|
|
|
|
|
# ifndef GC_PRIVATE_H
|
|
# define GC_PRIVATE_H
|
|
|
|
#if defined(mips) && defined(SYSTYPE_BSD) && defined(sony_news)
|
|
/* sony RISC NEWS, NEWSOS 4 */
|
|
# define BSD_TIME
|
|
/* typedef long ptrdiff_t; -- necessary on some really old systems */
|
|
#endif
|
|
|
|
#if defined(mips) && defined(SYSTYPE_BSD43)
|
|
/* MIPS RISCOS 4 */
|
|
# define BSD_TIME
|
|
#endif
|
|
|
|
#ifdef BSD_TIME
|
|
# include <sys/types.h>
|
|
# include <sys/time.h>
|
|
# include <sys/resource.h>
|
|
#endif /* BSD_TIME */
|
|
|
|
# ifndef GC_H
|
|
# include "gc.h"
|
|
# endif
|
|
|
|
# ifndef GC_MARK_H
|
|
# include "../gc_mark.h"
|
|
# endif
|
|
|
|
typedef GC_word word;
|
|
typedef GC_signed_word signed_word;
|
|
|
|
typedef int GC_bool;
|
|
# define TRUE 1
|
|
# define FALSE 0
|
|
|
|
typedef char * ptr_t; /* A generic pointer to which we can add */
|
|
/* byte displacements. */
|
|
/* Preferably identical to caddr_t, if it */
|
|
/* exists. */
|
|
|
|
# ifndef GCCONFIG_H
|
|
# include "gcconfig.h"
|
|
# endif
|
|
|
|
# ifndef HEADERS_H
|
|
# include "gc_hdrs.h"
|
|
# endif
|
|
|
|
#if defined(__STDC__)
|
|
# include <stdlib.h>
|
|
# if !(defined( sony_news ) )
|
|
# include <stddef.h>
|
|
# endif
|
|
# define VOLATILE volatile
|
|
#else
|
|
# ifdef MSWIN32
|
|
# include <stdlib.h>
|
|
# endif
|
|
# define VOLATILE
|
|
#endif
|
|
|
|
#if 0 /* defined(__GNUC__) doesn't work yet */
|
|
# define EXPECT(expr, outcome) __builtin_expect(expr,outcome)
|
|
/* Equivalent to (expr), but predict that usually (expr)==outcome. */
|
|
#else
|
|
# define EXPECT(expr, outcome) (expr)
|
|
#endif /* __GNUC__ */
|
|
|
|
# ifndef GC_LOCKS_H
|
|
# include "gc_locks.h"
|
|
# endif
|
|
|
|
# ifdef STACK_GROWS_DOWN
|
|
# define COOLER_THAN >
|
|
# define HOTTER_THAN <
|
|
# define MAKE_COOLER(x,y) if ((word)(x)+(y) > (word)(x)) {(x) += (y);} \
|
|
else {(x) = (word)ONES;}
|
|
# define MAKE_HOTTER(x,y) (x) -= (y)
|
|
# else
|
|
# define COOLER_THAN <
|
|
# define HOTTER_THAN >
|
|
# define MAKE_COOLER(x,y) if ((word)(x)-(y) < (word)(x)) {(x) -= (y);} else {(x) = 0;}
|
|
# define MAKE_HOTTER(x,y) (x) += (y)
|
|
# endif
|
|
|
|
#if defined(AMIGA) && defined(__SASC)
|
|
# define GC_FAR __far
|
|
#else
|
|
# define GC_FAR
|
|
#endif
|
|
|
|
|
|
/*********************************/
|
|
/* */
|
|
/* Definitions for conservative */
|
|
/* collector */
|
|
/* */
|
|
/*********************************/
|
|
|
|
/*********************************/
|
|
/* */
|
|
/* Easily changeable parameters */
|
|
/* */
|
|
/*********************************/
|
|
|
|
/* #define STUBBORN_ALLOC */
|
|
/* Enable stubborm allocation, and thus a limited */
|
|
/* form of incremental collection w/o dirty bits. */
|
|
|
|
/* #define ALL_INTERIOR_POINTERS */
|
|
/* Forces all pointers into the interior of an */
|
|
/* object to be considered valid. Also causes the */
|
|
/* sizes of all objects to be inflated by at least */
|
|
/* one byte. This should suffice to guarantee */
|
|
/* that in the presence of a compiler that does */
|
|
/* not perform garbage-collector-unsafe */
|
|
/* optimizations, all portable, strictly ANSI */
|
|
/* conforming C programs should be safely usable */
|
|
/* with malloc replaced by GC_malloc and free */
|
|
/* calls removed. There are several disadvantages: */
|
|
/* 1. There are probably no interesting, portable, */
|
|
/* strictly ANSI conforming C programs. */
|
|
/* 2. This option makes it hard for the collector */
|
|
/* to allocate space that is not ``pointed to'' */
|
|
/* by integers, etc. Under SunOS 4.X with a */
|
|
/* statically linked libc, we empiricaly */
|
|
/* observed that it would be difficult to */
|
|
/* allocate individual objects larger than 100K. */
|
|
/* Even if only smaller objects are allocated, */
|
|
/* more swap space is likely to be needed. */
|
|
/* Fortunately, much of this will never be */
|
|
/* touched. */
|
|
/* If you can easily avoid using this option, do. */
|
|
/* If not, try to keep individual objects small. */
|
|
/* This is now really controlled at startup, */
|
|
/* through GC_all_interior_pointers. */
|
|
|
|
#define PRINTSTATS /* Print garbage collection statistics */
|
|
/* For less verbose output, undefine in reclaim.c */
|
|
|
|
#define PRINTTIMES /* Print the amount of time consumed by each garbage */
|
|
/* collection. */
|
|
|
|
#define PRINTBLOCKS /* Print object sizes associated with heap blocks, */
|
|
/* whether the objects are atomic or composite, and */
|
|
/* whether or not the block was found to be empty */
|
|
/* during the reclaim phase. Typically generates */
|
|
/* about one screenful per garbage collection. */
|
|
#undef PRINTBLOCKS
|
|
|
|
#ifdef SILENT
|
|
# ifdef PRINTSTATS
|
|
# undef PRINTSTATS
|
|
# endif
|
|
# ifdef PRINTTIMES
|
|
# undef PRINTTIMES
|
|
# endif
|
|
# ifdef PRINTNBLOCKS
|
|
# undef PRINTNBLOCKS
|
|
# endif
|
|
#endif
|
|
|
|
#if defined(PRINTSTATS) && !defined(GATHERSTATS)
|
|
# define GATHERSTATS
|
|
#endif
|
|
|
|
#if defined(PRINTSTATS) || !defined(SMALL_CONFIG)
|
|
# define CONDPRINT /* Print some things if GC_print_stats is set */
|
|
#endif
|
|
|
|
#define GC_INVOKE_FINALIZERS() GC_notify_or_invoke_finalizers()
|
|
|
|
#define MERGE_SIZES /* Round up some object sizes, so that fewer distinct */
|
|
/* free lists are actually maintained. This applies */
|
|
/* only to the top level routines in misc.c, not to */
|
|
/* user generated code that calls GC_allocobj and */
|
|
/* GC_allocaobj directly. */
|
|
/* Slows down average programs slightly. May however */
|
|
/* substantially reduce fragmentation if allocation */
|
|
/* request sizes are widely scattered. */
|
|
/* May save significant amounts of space for obj_map */
|
|
/* entries. */
|
|
|
|
#if defined(USE_MARK_BYTES) && !defined(ALIGN_DOUBLE)
|
|
# define ALIGN_DOUBLE
|
|
/* We use one byte for every 2 words, which doesn't allow for */
|
|
/* odd numbered words to have mark bits. */
|
|
#endif
|
|
|
|
#if defined(GC_GCJ_SUPPORT) && ALIGNMENT < 8 && !defined(ALIGN_DOUBLE)
|
|
/* GCJ's Hashtable synchronization code requires 64-bit alignment. */
|
|
# define ALIGN_DOUBLE
|
|
#endif
|
|
|
|
|
|
/* ALIGN_DOUBLE requires MERGE_SIZES at present. */
|
|
# if defined(ALIGN_DOUBLE) && !defined(MERGE_SIZES)
|
|
# define MERGE_SIZES
|
|
# endif
|
|
|
|
#if !defined(DONT_ADD_BYTE_AT_END)
|
|
# define EXTRA_BYTES GC_all_interior_pointers
|
|
#else
|
|
# define EXTRA_BYTES 0
|
|
#endif
|
|
|
|
|
|
# ifndef LARGE_CONFIG
|
|
# define MINHINCR 16 /* Minimum heap increment, in blocks of HBLKSIZE */
|
|
/* Must be multiple of largest page size. */
|
|
# define MAXHINCR 2048 /* Maximum heap increment, in blocks */
|
|
# else
|
|
# define MINHINCR 64
|
|
# define MAXHINCR 4096
|
|
# endif
|
|
|
|
# define TIME_LIMIT 50 /* We try to keep pause times from exceeding */
|
|
/* this by much. In milliseconds. */
|
|
|
|
# define BL_LIMIT GC_black_list_spacing
|
|
/* If we need a block of N bytes, and we have */
|
|
/* a block of N + BL_LIMIT bytes available, */
|
|
/* and N > BL_LIMIT, */
|
|
/* but all possible positions in it are */
|
|
/* blacklisted, we just use it anyway (and */
|
|
/* print a warning, if warnings are enabled). */
|
|
/* This risks subsequently leaking the block */
|
|
/* due to a false reference. But not using */
|
|
/* the block risks unreasonable immediate */
|
|
/* heap growth. */
|
|
|
|
/*********************************/
|
|
/* */
|
|
/* Stack saving for debugging */
|
|
/* */
|
|
/*********************************/
|
|
|
|
#ifdef SAVE_CALL_CHAIN
|
|
|
|
/* Fill in the pc and argument information for up to NFRAMES of my */
|
|
/* callers. Ignore my frame and my callers frame. */
|
|
struct callinfo;
|
|
void GC_save_callers GC_PROTO((struct callinfo info[NFRAMES]));
|
|
|
|
void GC_print_callers GC_PROTO((struct callinfo info[NFRAMES]));
|
|
|
|
#endif
|
|
|
|
#ifdef NEED_CALLINFO
|
|
struct callinfo {
|
|
word ci_pc; /* Caller, not callee, pc */
|
|
# if NARGS > 0
|
|
word ci_arg[NARGS]; /* bit-wise complement to avoid retention */
|
|
# endif
|
|
# if defined(ALIGN_DOUBLE) && (NFRAMES * (NARGS + 1)) % 2 == 1
|
|
/* Likely alignment problem. */
|
|
word ci_dummy;
|
|
# endif
|
|
};
|
|
#endif
|
|
|
|
|
|
/*********************************/
|
|
/* */
|
|
/* OS interface routines */
|
|
/* */
|
|
/*********************************/
|
|
|
|
#ifdef BSD_TIME
|
|
# undef CLOCK_TYPE
|
|
# undef GET_TIME
|
|
# undef MS_TIME_DIFF
|
|
# define CLOCK_TYPE struct timeval
|
|
# define GET_TIME(x) { struct rusage rusage; \
|
|
getrusage (RUSAGE_SELF, &rusage); \
|
|
x = rusage.ru_utime; }
|
|
# define MS_TIME_DIFF(a,b) ((double) (a.tv_sec - b.tv_sec) * 1000.0 \
|
|
+ (double) (a.tv_usec - b.tv_usec) / 1000.0)
|
|
#else /* !BSD_TIME */
|
|
# if defined(MSWIN32) || defined(MSWINCE)
|
|
# include <windows.h>
|
|
# include <winbase.h>
|
|
# define CLOCK_TYPE DWORD
|
|
# define GET_TIME(x) x = GetTickCount()
|
|
# define MS_TIME_DIFF(a,b) ((long)((a)-(b)))
|
|
# else /* !MSWIN32, !MSWINCE, !BSD_TIME */
|
|
# include <time.h>
|
|
# if !defined(__STDC__) && defined(SPARC) && defined(SUNOS4)
|
|
clock_t clock(); /* Not in time.h, where it belongs */
|
|
# endif
|
|
# if defined(FREEBSD) && !defined(CLOCKS_PER_SEC)
|
|
# include <machine/limits.h>
|
|
# define CLOCKS_PER_SEC CLK_TCK
|
|
# endif
|
|
# if !defined(CLOCKS_PER_SEC)
|
|
# define CLOCKS_PER_SEC 1000000
|
|
/*
|
|
* This is technically a bug in the implementation. ANSI requires that
|
|
* CLOCKS_PER_SEC be defined. But at least under SunOS4.1.1, it isn't.
|
|
* Also note that the combination of ANSI C and POSIX is incredibly gross
|
|
* here. The type clock_t is used by both clock() and times(). But on
|
|
* some machines these use different notions of a clock tick, CLOCKS_PER_SEC
|
|
* seems to apply only to clock. Hence we use it here. On many machines,
|
|
* including SunOS, clock actually uses units of microseconds (which are
|
|
* not really clock ticks).
|
|
*/
|
|
# endif
|
|
# define CLOCK_TYPE clock_t
|
|
# define GET_TIME(x) x = clock()
|
|
# define MS_TIME_DIFF(a,b) ((unsigned long) \
|
|
(1000.0*(double)((a)-(b))/(double)CLOCKS_PER_SEC))
|
|
# endif /* !MSWIN32 */
|
|
#endif /* !BSD_TIME */
|
|
|
|
/* We use bzero and bcopy internally. They may not be available. */
|
|
# if defined(SPARC) && defined(SUNOS4)
|
|
# define BCOPY_EXISTS
|
|
# endif
|
|
# if defined(M68K) && defined(AMIGA)
|
|
# define BCOPY_EXISTS
|
|
# endif
|
|
# if defined(M68K) && defined(NEXT)
|
|
# define BCOPY_EXISTS
|
|
# endif
|
|
# if defined(VAX)
|
|
# define BCOPY_EXISTS
|
|
# endif
|
|
# if defined(AMIGA)
|
|
# include <string.h>
|
|
# define BCOPY_EXISTS
|
|
# endif
|
|
# if defined(MACOSX)
|
|
# define BCOPY_EXISTS
|
|
# endif
|
|
|
|
# ifndef BCOPY_EXISTS
|
|
# include <string.h>
|
|
# define BCOPY(x,y,n) memcpy(y, x, (size_t)(n))
|
|
# define BZERO(x,n) memset(x, 0, (size_t)(n))
|
|
# else
|
|
# define BCOPY(x,y,n) bcopy((char *)(x),(char *)(y),(int)(n))
|
|
# define BZERO(x,n) bzero((char *)(x),(int)(n))
|
|
# endif
|
|
|
|
/* HBLKSIZE aligned allocation. 0 is taken to mean failure */
|
|
/* space is assumed to be cleared. */
|
|
/* In the case os USE_MMAP, the argument must also be a */
|
|
/* physical page size. */
|
|
/* GET_MEM is currently not assumed to retrieve 0 filled space, */
|
|
/* though we should perhaps take advantage of the case in which */
|
|
/* does. */
|
|
struct hblk; /* See below. */
|
|
# ifdef PCR
|
|
char * real_malloc();
|
|
# define GET_MEM(bytes) HBLKPTR(real_malloc((size_t)bytes + GC_page_size) \
|
|
+ GC_page_size-1)
|
|
# else
|
|
# ifdef OS2
|
|
void * os2_alloc(size_t bytes);
|
|
# define GET_MEM(bytes) HBLKPTR((ptr_t)os2_alloc((size_t)bytes \
|
|
+ GC_page_size) \
|
|
+ GC_page_size-1)
|
|
# else
|
|
# if defined(NEXT) || defined(MACOSX) || defined(DOS4GW) || \
|
|
(defined(AMIGA) && !defined(GC_AMIGA_FASTALLOC)) || \
|
|
(defined(SUNOS5) && !defined(USE_MMAP))
|
|
# define GET_MEM(bytes) HBLKPTR((size_t) \
|
|
calloc(1, (size_t)bytes + GC_page_size) \
|
|
+ GC_page_size-1)
|
|
# else
|
|
# ifdef MSWIN32
|
|
extern ptr_t GC_win32_get_mem();
|
|
# define GET_MEM(bytes) (struct hblk *)GC_win32_get_mem(bytes)
|
|
# else
|
|
# ifdef MACOS
|
|
# if defined(USE_TEMPORARY_MEMORY)
|
|
extern Ptr GC_MacTemporaryNewPtr(size_t size,
|
|
Boolean clearMemory);
|
|
# define GET_MEM(bytes) HBLKPTR( \
|
|
GC_MacTemporaryNewPtr(bytes + GC_page_size, true) \
|
|
+ GC_page_size-1)
|
|
# else
|
|
# define GET_MEM(bytes) HBLKPTR( \
|
|
NewPtrClear(bytes + GC_page_size) + GC_page_size-1)
|
|
# endif
|
|
# else
|
|
# ifdef MSWINCE
|
|
extern ptr_t GC_wince_get_mem();
|
|
# define GET_MEM(bytes) (struct hblk *)GC_wince_get_mem(bytes)
|
|
# else
|
|
# if defined(AMIGA) && defined(GC_AMIGA_FASTALLOC)
|
|
extern void *GC_amiga_get_mem(size_t size);
|
|
define GET_MEM(bytes) HBLKPTR((size_t) \
|
|
GC_amiga_get_mem((size_t)bytes + GC_page_size) \
|
|
+ GC_page_size-1)
|
|
# else
|
|
extern ptr_t GC_unix_get_mem();
|
|
# define GET_MEM(bytes) (struct hblk *)GC_unix_get_mem(bytes)
|
|
# endif
|
|
# endif
|
|
# endif
|
|
# endif
|
|
# endif
|
|
# endif
|
|
# endif
|
|
|
|
/* Delay any interrupts or signals that may abort this thread. Data */
|
|
/* structures are in a consistent state outside this pair of calls. */
|
|
/* ANSI C allows both to be empty (though the standard isn't very */
|
|
/* clear on that point). Standard malloc implementations are usually */
|
|
/* neither interruptable nor thread-safe, and thus correspond to */
|
|
/* empty definitions. */
|
|
/* It probably doesn't make any sense to declare these to be nonempty */
|
|
/* if the code is being optimized, since signal safety relies on some */
|
|
/* ordering constraints that are typically not obeyed by optimizing */
|
|
/* compilers. */
|
|
# ifdef PCR
|
|
# define DISABLE_SIGNALS() \
|
|
PCR_Th_SetSigMask(PCR_allSigsBlocked,&GC_old_sig_mask)
|
|
# define ENABLE_SIGNALS() \
|
|
PCR_Th_SetSigMask(&GC_old_sig_mask, NIL)
|
|
# else
|
|
# if defined(THREADS) || defined(AMIGA) \
|
|
|| defined(MSWIN32) || defined(MSWINCE) || defined(MACOS) \
|
|
|| defined(DJGPP) || defined(NO_SIGNALS)
|
|
/* Also useful for debugging. */
|
|
/* Should probably use thr_sigsetmask for GC_SOLARIS_THREADS. */
|
|
# define DISABLE_SIGNALS()
|
|
# define ENABLE_SIGNALS()
|
|
# else
|
|
# define DISABLE_SIGNALS() GC_disable_signals()
|
|
void GC_disable_signals();
|
|
# define ENABLE_SIGNALS() GC_enable_signals()
|
|
void GC_enable_signals();
|
|
# endif
|
|
# endif
|
|
|
|
/*
|
|
* Stop and restart mutator threads.
|
|
*/
|
|
# ifdef PCR
|
|
# include "th/PCR_ThCtl.h"
|
|
# define STOP_WORLD() \
|
|
PCR_ThCtl_SetExclusiveMode(PCR_ThCtl_ExclusiveMode_stopNormal, \
|
|
PCR_allSigsBlocked, \
|
|
PCR_waitForever)
|
|
# define START_WORLD() \
|
|
PCR_ThCtl_SetExclusiveMode(PCR_ThCtl_ExclusiveMode_null, \
|
|
PCR_allSigsBlocked, \
|
|
PCR_waitForever);
|
|
# else
|
|
# if defined(GC_SOLARIS_THREADS) || defined(GC_WIN32_THREADS) \
|
|
|| defined(GC_PTHREADS)
|
|
void GC_stop_world();
|
|
void GC_start_world();
|
|
# define STOP_WORLD() GC_stop_world()
|
|
# define START_WORLD() GC_start_world()
|
|
# else
|
|
# define STOP_WORLD()
|
|
# define START_WORLD()
|
|
# endif
|
|
# endif
|
|
|
|
/* Abandon ship */
|
|
# ifdef PCR
|
|
# define ABORT(s) PCR_Base_Panic(s)
|
|
# else
|
|
# ifdef SMALL_CONFIG
|
|
# define ABORT(msg) abort();
|
|
# else
|
|
GC_API void GC_abort();
|
|
# define ABORT(msg) GC_abort(msg);
|
|
# endif
|
|
# endif
|
|
|
|
/* Exit abnormally, but without making a mess (e.g. out of memory) */
|
|
# ifdef PCR
|
|
# define EXIT() PCR_Base_Exit(1,PCR_waitForever)
|
|
# else
|
|
# define EXIT() (void)exit(1)
|
|
# endif
|
|
|
|
/* Print warning message, e.g. almost out of memory. */
|
|
# define WARN(msg,arg) (*GC_current_warn_proc)("GC Warning: " msg, (GC_word)(arg))
|
|
extern GC_warn_proc GC_current_warn_proc;
|
|
|
|
/* Get environment entry */
|
|
#if !defined(NO_GETENV)
|
|
# define GETENV(name) getenv(name)
|
|
#else
|
|
# define GETENV(name) 0
|
|
#endif
|
|
|
|
/*********************************/
|
|
/* */
|
|
/* Word-size-dependent defines */
|
|
/* */
|
|
/*********************************/
|
|
|
|
#if CPP_WORDSZ == 32
|
|
# define WORDS_TO_BYTES(x) ((x)<<2)
|
|
# define BYTES_TO_WORDS(x) ((x)>>2)
|
|
# define LOGWL ((word)5) /* log[2] of CPP_WORDSZ */
|
|
# define modWORDSZ(n) ((n) & 0x1f) /* n mod size of word */
|
|
# if ALIGNMENT != 4
|
|
# define UNALIGNED
|
|
# endif
|
|
#endif
|
|
|
|
#if CPP_WORDSZ == 64
|
|
# define WORDS_TO_BYTES(x) ((x)<<3)
|
|
# define BYTES_TO_WORDS(x) ((x)>>3)
|
|
# define LOGWL ((word)6) /* log[2] of CPP_WORDSZ */
|
|
# define modWORDSZ(n) ((n) & 0x3f) /* n mod size of word */
|
|
# if ALIGNMENT != 8
|
|
# define UNALIGNED
|
|
# endif
|
|
#endif
|
|
|
|
#define WORDSZ ((word)CPP_WORDSZ)
|
|
#define SIGNB ((word)1 << (WORDSZ-1))
|
|
#define BYTES_PER_WORD ((word)(sizeof (word)))
|
|
#define ONES ((word)(signed_word)(-1))
|
|
#define divWORDSZ(n) ((n) >> LOGWL) /* divide n by size of word */
|
|
|
|
/*********************/
|
|
/* */
|
|
/* Size Parameters */
|
|
/* */
|
|
/*********************/
|
|
|
|
/* heap block size, bytes. Should be power of 2 */
|
|
|
|
#ifndef HBLKSIZE
|
|
# ifdef SMALL_CONFIG
|
|
# define CPP_LOG_HBLKSIZE 10
|
|
# else
|
|
# if (CPP_WORDSZ == 32) || (defined(HPUX) && defined(HP_PA))
|
|
/* HPUX/PA seems to use 4K pages with the 64 bit ABI */
|
|
# define CPP_LOG_HBLKSIZE 12
|
|
# else
|
|
# define CPP_LOG_HBLKSIZE 13
|
|
# endif
|
|
# endif
|
|
#else
|
|
# if HBLKSIZE == 512
|
|
# define CPP_LOG_HBLKSIZE 9
|
|
# endif
|
|
# if HBLKSIZE == 1024
|
|
# define CPP_LOG_HBLKSIZE 10
|
|
# endif
|
|
# if HBLKSIZE == 2048
|
|
# define CPP_LOG_HBLKSIZE 11
|
|
# endif
|
|
# if HBLKSIZE == 4096
|
|
# define CPP_LOG_HBLKSIZE 12
|
|
# endif
|
|
# if HBLKSIZE == 8192
|
|
# define CPP_LOG_HBLKSIZE 13
|
|
# endif
|
|
# if HBLKSIZE == 16384
|
|
# define CPP_LOG_HBLKSIZE 14
|
|
# endif
|
|
# ifndef CPP_LOG_HBLKSIZE
|
|
--> fix HBLKSIZE
|
|
# endif
|
|
# undef HBLKSIZE
|
|
#endif
|
|
# define CPP_HBLKSIZE (1 << CPP_LOG_HBLKSIZE)
|
|
# define LOG_HBLKSIZE ((word)CPP_LOG_HBLKSIZE)
|
|
# define HBLKSIZE ((word)CPP_HBLKSIZE)
|
|
|
|
|
|
/* max size objects supported by freelist (larger objects may be */
|
|
/* allocated, but less efficiently) */
|
|
|
|
#define CPP_MAXOBJBYTES (CPP_HBLKSIZE/2)
|
|
#define MAXOBJBYTES ((word)CPP_MAXOBJBYTES)
|
|
#define CPP_MAXOBJSZ BYTES_TO_WORDS(CPP_HBLKSIZE/2)
|
|
#define MAXOBJSZ ((word)CPP_MAXOBJSZ)
|
|
|
|
# define divHBLKSZ(n) ((n) >> LOG_HBLKSIZE)
|
|
|
|
# define HBLK_PTR_DIFF(p,q) divHBLKSZ((ptr_t)p - (ptr_t)q)
|
|
/* Equivalent to subtracting 2 hblk pointers. */
|
|
/* We do it this way because a compiler should */
|
|
/* find it hard to use an integer division */
|
|
/* instead of a shift. The bundled SunOS 4.1 */
|
|
/* o.w. sometimes pessimizes the subtraction to */
|
|
/* involve a call to .div. */
|
|
|
|
# define modHBLKSZ(n) ((n) & (HBLKSIZE-1))
|
|
|
|
# define HBLKPTR(objptr) ((struct hblk *)(((word) (objptr)) & ~(HBLKSIZE-1)))
|
|
|
|
# define HBLKDISPL(objptr) (((word) (objptr)) & (HBLKSIZE-1))
|
|
|
|
/* Round up byte allocation requests to integral number of words, etc. */
|
|
# define ROUNDED_UP_WORDS(n) \
|
|
BYTES_TO_WORDS((n) + (WORDS_TO_BYTES(1) - 1 + EXTRA_BYTES))
|
|
# ifdef ALIGN_DOUBLE
|
|
# define ALIGNED_WORDS(n) \
|
|
(BYTES_TO_WORDS((n) + WORDS_TO_BYTES(2) - 1 + EXTRA_BYTES) & ~1)
|
|
# else
|
|
# define ALIGNED_WORDS(n) ROUNDED_UP_WORDS(n)
|
|
# endif
|
|
# define SMALL_OBJ(bytes) ((bytes) < (MAXOBJBYTES - EXTRA_BYTES))
|
|
# define ADD_SLOP(bytes) ((bytes) + EXTRA_BYTES)
|
|
# ifndef MIN_WORDS
|
|
/* MIN_WORDS is the size of the smallest allocated object. */
|
|
/* 1 and 2 are the only valid values. */
|
|
/* 2 must be used if: */
|
|
/* - GC_gcj_malloc can be used for objects of requested */
|
|
/* size smaller than 2 words, or */
|
|
/* - USE_MARK_BYTES is defined. */
|
|
# if defined(USE_MARK_BYTES) || defined(GC_GCJ_SUPPORT)
|
|
# define MIN_WORDS 2 /* Smallest allocated object. */
|
|
# else
|
|
# define MIN_WORDS 1
|
|
# endif
|
|
# endif
|
|
|
|
|
|
/*
|
|
* Hash table representation of sets of pages. This assumes it is
|
|
* OK to add spurious entries to sets.
|
|
* Used by black-listing code, and perhaps by dirty bit maintenance code.
|
|
*/
|
|
|
|
# ifdef LARGE_CONFIG
|
|
# define LOG_PHT_ENTRIES 19 /* Collisions likely at 512K blocks, */
|
|
/* which is >= 2GB. Each table takes */
|
|
/* 64KB. */
|
|
# else
|
|
# ifdef SMALL_CONFIG
|
|
# define LOG_PHT_ENTRIES 14 /* Collisions are likely if heap grows */
|
|
/* to more than 16K hblks = 64MB. */
|
|
/* Each hash table occupies 2K bytes. */
|
|
# else /* default "medium" configuration */
|
|
# define LOG_PHT_ENTRIES 16 /* Collisions are likely if heap grows */
|
|
/* to more than 16K hblks >= 256MB. */
|
|
/* Each hash table occupies 8K bytes. */
|
|
# endif
|
|
# endif
|
|
# define PHT_ENTRIES ((word)1 << LOG_PHT_ENTRIES)
|
|
# define PHT_SIZE (PHT_ENTRIES >> LOGWL)
|
|
typedef word page_hash_table[PHT_SIZE];
|
|
|
|
# define PHT_HASH(addr) ((((word)(addr)) >> LOG_HBLKSIZE) & (PHT_ENTRIES - 1))
|
|
|
|
# define get_pht_entry_from_index(bl, index) \
|
|
(((bl)[divWORDSZ(index)] >> modWORDSZ(index)) & 1)
|
|
# define set_pht_entry_from_index(bl, index) \
|
|
(bl)[divWORDSZ(index)] |= (word)1 << modWORDSZ(index)
|
|
# define clear_pht_entry_from_index(bl, index) \
|
|
(bl)[divWORDSZ(index)] &= ~((word)1 << modWORDSZ(index))
|
|
/* And a dumb but thread-safe version of set_pht_entry_from_index. */
|
|
/* This sets (many) extra bits. */
|
|
# define set_pht_entry_from_index_safe(bl, index) \
|
|
(bl)[divWORDSZ(index)] = ONES
|
|
|
|
|
|
|
|
/********************************************/
|
|
/* */
|
|
/* H e a p B l o c k s */
|
|
/* */
|
|
/********************************************/
|
|
|
|
/* heap block header */
|
|
#define HBLKMASK (HBLKSIZE-1)
|
|
|
|
#define BITS_PER_HBLK (CPP_HBLKSIZE * 8)
|
|
|
|
#define MARK_BITS_PER_HBLK (BITS_PER_HBLK/CPP_WORDSZ)
|
|
/* upper bound */
|
|
/* We allocate 1 bit/word, unless USE_MARK_BYTES */
|
|
/* is defined. Only the first word */
|
|
/* in each object is actually marked. */
|
|
|
|
# ifdef USE_MARK_BYTES
|
|
# define MARK_BITS_SZ (MARK_BITS_PER_HBLK/2)
|
|
/* Unlike the other case, this is in units of bytes. */
|
|
/* We actually allocate only every second mark bit, since we */
|
|
/* force all objects to be doubleword aligned. */
|
|
/* However, each mark bit is allocated as a byte. */
|
|
# else
|
|
# define MARK_BITS_SZ (MARK_BITS_PER_HBLK/CPP_WORDSZ)
|
|
# endif
|
|
|
|
/* We maintain layout maps for heap blocks containing objects of a given */
|
|
/* size. Each entry in this map describes a byte offset and has the */
|
|
/* following type. */
|
|
typedef unsigned char map_entry_type;
|
|
|
|
struct hblkhdr {
|
|
word hb_sz; /* If in use, size in words, of objects in the block. */
|
|
/* if free, the size in bytes of the whole block */
|
|
struct hblk * hb_next; /* Link field for hblk free list */
|
|
/* and for lists of chunks waiting to be */
|
|
/* reclaimed. */
|
|
struct hblk * hb_prev; /* Backwards link for free list. */
|
|
word hb_descr; /* object descriptor for marking. See */
|
|
/* mark.h. */
|
|
map_entry_type * hb_map;
|
|
/* A pointer to a pointer validity map of the block. */
|
|
/* See GC_obj_map. */
|
|
/* Valid for all blocks with headers. */
|
|
/* Free blocks point to GC_invalid_map. */
|
|
unsigned char hb_obj_kind;
|
|
/* Kind of objects in the block. Each kind */
|
|
/* identifies a mark procedure and a set of */
|
|
/* list headers. Sometimes called regions. */
|
|
unsigned char hb_flags;
|
|
# define IGNORE_OFF_PAGE 1 /* Ignore pointers that do not */
|
|
/* point to the first page of */
|
|
/* this object. */
|
|
# define WAS_UNMAPPED 2 /* This is a free block, which has */
|
|
/* been unmapped from the address */
|
|
/* space. */
|
|
/* GC_remap must be invoked on it */
|
|
/* before it can be reallocated. */
|
|
/* Only set with USE_MUNMAP. */
|
|
unsigned short hb_last_reclaimed;
|
|
/* Value of GC_gc_no when block was */
|
|
/* last allocated or swept. May wrap. */
|
|
/* For a free block, this is maintained */
|
|
/* only for USE_MUNMAP, and indicates */
|
|
/* when the header was allocated, or */
|
|
/* when the size of the block last */
|
|
/* changed. */
|
|
# ifdef USE_MARK_BYTES
|
|
union {
|
|
char _hb_marks[MARK_BITS_SZ];
|
|
/* The i'th byte is 1 if the object */
|
|
/* starting at word 2i is marked, 0 o.w. */
|
|
word dummy; /* Force word alignment of mark bytes. */
|
|
} _mark_byte_union;
|
|
# define hb_marks _mark_byte_union._hb_marks
|
|
# else
|
|
word hb_marks[MARK_BITS_SZ];
|
|
/* Bit i in the array refers to the */
|
|
/* object starting at the ith word (header */
|
|
/* INCLUDED) in the heap block. */
|
|
/* The lsb of word 0 is numbered 0. */
|
|
/* Unused bits are invalid, and are */
|
|
/* occasionally set, e.g for uncollectable */
|
|
/* objects. */
|
|
# endif /* !USE_MARK_BYTES */
|
|
};
|
|
|
|
/* heap block body */
|
|
|
|
# define BODY_SZ (HBLKSIZE/sizeof(word))
|
|
|
|
struct hblk {
|
|
word hb_body[BODY_SZ];
|
|
};
|
|
|
|
# define HBLK_IS_FREE(hdr) ((hdr) -> hb_map == GC_invalid_map)
|
|
|
|
# define OBJ_SZ_TO_BLOCKS(sz) \
|
|
divHBLKSZ(WORDS_TO_BYTES(sz) + HBLKSIZE-1)
|
|
/* Size of block (in units of HBLKSIZE) needed to hold objects of */
|
|
/* given sz (in words). */
|
|
|
|
/* Object free list link */
|
|
# define obj_link(p) (*(ptr_t *)(p))
|
|
|
|
# define LOG_MAX_MARK_PROCS 6
|
|
# define MAX_MARK_PROCS (1 << LOG_MAX_MARK_PROCS)
|
|
|
|
/* Root sets. Logically private to mark_rts.c. But we don't want the */
|
|
/* tables scanned, so we put them here. */
|
|
/* MAX_ROOT_SETS is the maximum number of ranges that can be */
|
|
/* registered as static roots. */
|
|
# ifdef LARGE_CONFIG
|
|
# define MAX_ROOT_SETS 4096
|
|
# else
|
|
# ifdef PCR
|
|
# define MAX_ROOT_SETS 1024
|
|
# else
|
|
# if defined(MSWIN32) || defined(MSWINCE)
|
|
# define MAX_ROOT_SETS 1024
|
|
/* Under NT, we add only written pages, which can result */
|
|
/* in many small root sets. */
|
|
# else
|
|
# define MAX_ROOT_SETS 256
|
|
# endif
|
|
# endif
|
|
# endif
|
|
|
|
# define MAX_EXCLUSIONS (MAX_ROOT_SETS/4)
|
|
/* Maximum number of segments that can be excluded from root sets. */
|
|
|
|
/*
|
|
* Data structure for excluded static roots.
|
|
*/
|
|
struct exclusion {
|
|
ptr_t e_start;
|
|
ptr_t e_end;
|
|
};
|
|
|
|
/* Data structure for list of root sets. */
|
|
/* We keep a hash table, so that we can filter out duplicate additions. */
|
|
/* Under Win32, we need to do a better job of filtering overlaps, so */
|
|
/* we resort to sequential search, and pay the price. */
|
|
struct roots {
|
|
ptr_t r_start;
|
|
ptr_t r_end;
|
|
# if !defined(MSWIN32) && !defined(MSWINCE)
|
|
struct roots * r_next;
|
|
# endif
|
|
GC_bool r_tmp;
|
|
/* Delete before registering new dynamic libraries */
|
|
};
|
|
|
|
#if !defined(MSWIN32) && !defined(MSWINCE)
|
|
/* Size of hash table index to roots. */
|
|
# define LOG_RT_SIZE 6
|
|
# define RT_SIZE (1 << LOG_RT_SIZE) /* Power of 2, may be != MAX_ROOT_SETS */
|
|
#endif
|
|
|
|
/* Lists of all heap blocks and free lists */
|
|
/* as well as other random data structures */
|
|
/* that should not be scanned by the */
|
|
/* collector. */
|
|
/* These are grouped together in a struct */
|
|
/* so that they can be easily skipped by the */
|
|
/* GC_mark routine. */
|
|
/* The ordering is weird to make GC_malloc */
|
|
/* faster by keeping the important fields */
|
|
/* sufficiently close together that a */
|
|
/* single load of a base register will do. */
|
|
/* Scalars that could easily appear to */
|
|
/* be pointers are also put here. */
|
|
/* The main fields should precede any */
|
|
/* conditionally included fields, so that */
|
|
/* gc_inl.h will work even if a different set */
|
|
/* of macros is defined when the client is */
|
|
/* compiled. */
|
|
|
|
struct _GC_arrays {
|
|
word _heapsize;
|
|
word _max_heapsize;
|
|
word _requested_heapsize; /* Heap size due to explicit expansion */
|
|
ptr_t _last_heap_addr;
|
|
ptr_t _prev_heap_addr;
|
|
word _large_free_bytes;
|
|
/* Total bytes contained in blocks on large object free */
|
|
/* list. */
|
|
word _large_allocd_bytes;
|
|
/* Total number of bytes in allocated large objects blocks. */
|
|
/* For the purposes of this counter and the next one only, a */
|
|
/* large object is one that occupies a block of at least */
|
|
/* 2*HBLKSIZE. */
|
|
word _max_large_allocd_bytes;
|
|
/* Maximum number of bytes that were ever allocated in */
|
|
/* large object blocks. This is used to help decide when it */
|
|
/* is safe to split up a large block. */
|
|
word _words_allocd_before_gc;
|
|
/* Number of words allocated before this */
|
|
/* collection cycle. */
|
|
# ifndef SEPARATE_GLOBALS
|
|
word _words_allocd;
|
|
/* Number of words allocated during this collection cycle */
|
|
# endif
|
|
word _words_wasted;
|
|
/* Number of words wasted due to internal fragmentation */
|
|
/* in large objects, or due to dropping blacklisted */
|
|
/* blocks, since last gc. Approximate. */
|
|
word _words_finalized;
|
|
/* Approximate number of words in objects (and headers) */
|
|
/* That became ready for finalization in the last */
|
|
/* collection. */
|
|
word _non_gc_bytes_at_gc;
|
|
/* Number of explicitly managed bytes of storage */
|
|
/* at last collection. */
|
|
word _mem_freed;
|
|
/* Number of explicitly deallocated words of memory */
|
|
/* since last collection. */
|
|
ptr_t _scratch_end_ptr;
|
|
ptr_t _scratch_last_end_ptr;
|
|
/* Used by headers.c, and can easily appear to point to */
|
|
/* heap. */
|
|
GC_mark_proc _mark_procs[MAX_MARK_PROCS];
|
|
/* Table of user-defined mark procedures. There is */
|
|
/* a small number of these, which can be referenced */
|
|
/* by DS_PROC mark descriptors. See gc_mark.h. */
|
|
|
|
# ifndef SEPARATE_GLOBALS
|
|
ptr_t _objfreelist[MAXOBJSZ+1];
|
|
/* free list for objects */
|
|
ptr_t _aobjfreelist[MAXOBJSZ+1];
|
|
/* free list for atomic objs */
|
|
# endif
|
|
|
|
ptr_t _uobjfreelist[MAXOBJSZ+1];
|
|
/* uncollectable but traced objs */
|
|
/* objects on this and auobjfreelist */
|
|
/* are always marked, except during */
|
|
/* garbage collections. */
|
|
# ifdef ATOMIC_UNCOLLECTABLE
|
|
ptr_t _auobjfreelist[MAXOBJSZ+1];
|
|
# endif
|
|
/* uncollectable but traced objs */
|
|
|
|
# ifdef GATHERSTATS
|
|
word _composite_in_use;
|
|
/* Number of words in accessible composite */
|
|
/* objects. */
|
|
word _atomic_in_use;
|
|
/* Number of words in accessible atomic */
|
|
/* objects. */
|
|
# endif
|
|
# ifdef USE_MUNMAP
|
|
word _unmapped_bytes;
|
|
# endif
|
|
# ifdef MERGE_SIZES
|
|
unsigned _size_map[WORDS_TO_BYTES(MAXOBJSZ+1)];
|
|
/* Number of words to allocate for a given allocation request in */
|
|
/* bytes. */
|
|
# endif
|
|
|
|
# ifdef STUBBORN_ALLOC
|
|
ptr_t _sobjfreelist[MAXOBJSZ+1];
|
|
# endif
|
|
/* free list for immutable objects */
|
|
map_entry_type * _obj_map[MAXOBJSZ+1];
|
|
/* If not NIL, then a pointer to a map of valid */
|
|
/* object addresses. _obj_map[sz][i] is j if the */
|
|
/* address block_start+i is a valid pointer */
|
|
/* to an object at block_start + */
|
|
/* WORDS_TO_BYTES(BYTES_TO_WORDS(i) - j) */
|
|
/* I.e. j is a word displacement from the */
|
|
/* object beginning. */
|
|
/* The entry is OBJ_INVALID if the corresponding */
|
|
/* address is not a valid pointer. It is */
|
|
/* OFFSET_TOO_BIG if the value j would be too */
|
|
/* large to fit in the entry. (Note that the */
|
|
/* size of these entries matters, both for */
|
|
/* space consumption and for cache utilization. */
|
|
# define OFFSET_TOO_BIG 0xfe
|
|
# define OBJ_INVALID 0xff
|
|
# define MAP_ENTRY(map, bytes) (map)[bytes]
|
|
# define MAP_ENTRIES HBLKSIZE
|
|
# define MAP_SIZE MAP_ENTRIES
|
|
# define CPP_MAX_OFFSET (OFFSET_TOO_BIG - 1)
|
|
# define MAX_OFFSET ((word)CPP_MAX_OFFSET)
|
|
/* The following are used only if GC_all_interior_ptrs != 0 */
|
|
# define VALID_OFFSET_SZ \
|
|
(CPP_MAX_OFFSET > WORDS_TO_BYTES(CPP_MAXOBJSZ)? \
|
|
CPP_MAX_OFFSET+1 \
|
|
: WORDS_TO_BYTES(CPP_MAXOBJSZ)+1)
|
|
char _valid_offsets[VALID_OFFSET_SZ];
|
|
/* GC_valid_offsets[i] == TRUE ==> i */
|
|
/* is registered as a displacement. */
|
|
# define OFFSET_VALID(displ) \
|
|
(GC_all_interior_pointers || GC_valid_offsets[displ])
|
|
char _modws_valid_offsets[sizeof(word)];
|
|
/* GC_valid_offsets[i] ==> */
|
|
/* GC_modws_valid_offsets[i%sizeof(word)] */
|
|
# ifdef STUBBORN_ALLOC
|
|
page_hash_table _changed_pages;
|
|
/* Stubborn object pages that were changes since last call to */
|
|
/* GC_read_changed. */
|
|
page_hash_table _prev_changed_pages;
|
|
/* Stubborn object pages that were changes before last call to */
|
|
/* GC_read_changed. */
|
|
# endif
|
|
# if defined(PROC_VDB) || defined(MPROTECT_VDB)
|
|
page_hash_table _grungy_pages; /* Pages that were dirty at last */
|
|
/* GC_read_dirty. */
|
|
# endif
|
|
# ifdef MPROTECT_VDB
|
|
VOLATILE page_hash_table _dirty_pages;
|
|
/* Pages dirtied since last GC_read_dirty. */
|
|
# endif
|
|
# ifdef PROC_VDB
|
|
page_hash_table _written_pages; /* Pages ever dirtied */
|
|
# endif
|
|
# ifdef LARGE_CONFIG
|
|
# if CPP_WORDSZ > 32
|
|
# define MAX_HEAP_SECTS 4096 /* overflows at roughly 64 GB */
|
|
# else
|
|
# define MAX_HEAP_SECTS 768 /* Separately added heap sections. */
|
|
# endif
|
|
# else
|
|
# ifdef SMALL_CONFIG
|
|
# define MAX_HEAP_SECTS 128 /* Roughly 1GB */
|
|
# else
|
|
# define MAX_HEAP_SECTS 384 /* Roughly 3GB */
|
|
# endif
|
|
# endif
|
|
struct HeapSect {
|
|
ptr_t hs_start; word hs_bytes;
|
|
} _heap_sects[MAX_HEAP_SECTS];
|
|
# if defined(MSWIN32) || defined(MSWINCE)
|
|
ptr_t _heap_bases[MAX_HEAP_SECTS];
|
|
/* Start address of memory regions obtained from kernel. */
|
|
# endif
|
|
# ifdef MSWINCE
|
|
word _heap_lengths[MAX_HEAP_SECTS];
|
|
/* Commited lengths of memory regions obtained from kernel. */
|
|
# endif
|
|
struct roots _static_roots[MAX_ROOT_SETS];
|
|
# if !defined(MSWIN32) && !defined(MSWINCE)
|
|
struct roots * _root_index[RT_SIZE];
|
|
# endif
|
|
struct exclusion _excl_table[MAX_EXCLUSIONS];
|
|
/* Block header index; see gc_headers.h */
|
|
bottom_index * _all_nils;
|
|
bottom_index * _top_index [TOP_SZ];
|
|
#ifdef SAVE_CALL_CHAIN
|
|
struct callinfo _last_stack[NFRAMES]; /* Stack at last garbage collection.*/
|
|
/* Useful for debugging mysterious */
|
|
/* object disappearances. */
|
|
/* In the multithreaded case, we */
|
|
/* currently only save the calling */
|
|
/* stack. */
|
|
#endif
|
|
};
|
|
|
|
GC_API GC_FAR struct _GC_arrays GC_arrays;
|
|
|
|
# ifndef SEPARATE_GLOBALS
|
|
# define GC_objfreelist GC_arrays._objfreelist
|
|
# define GC_aobjfreelist GC_arrays._aobjfreelist
|
|
# define GC_words_allocd GC_arrays._words_allocd
|
|
# endif
|
|
# define GC_uobjfreelist GC_arrays._uobjfreelist
|
|
# ifdef ATOMIC_UNCOLLECTABLE
|
|
# define GC_auobjfreelist GC_arrays._auobjfreelist
|
|
# endif
|
|
# define GC_sobjfreelist GC_arrays._sobjfreelist
|
|
# define GC_valid_offsets GC_arrays._valid_offsets
|
|
# define GC_modws_valid_offsets GC_arrays._modws_valid_offsets
|
|
# ifdef STUBBORN_ALLOC
|
|
# define GC_changed_pages GC_arrays._changed_pages
|
|
# define GC_prev_changed_pages GC_arrays._prev_changed_pages
|
|
# endif
|
|
# define GC_obj_map GC_arrays._obj_map
|
|
# define GC_last_heap_addr GC_arrays._last_heap_addr
|
|
# define GC_prev_heap_addr GC_arrays._prev_heap_addr
|
|
# define GC_words_wasted GC_arrays._words_wasted
|
|
# define GC_large_free_bytes GC_arrays._large_free_bytes
|
|
# define GC_large_allocd_bytes GC_arrays._large_allocd_bytes
|
|
# define GC_max_large_allocd_bytes GC_arrays._max_large_allocd_bytes
|
|
# define GC_words_finalized GC_arrays._words_finalized
|
|
# define GC_non_gc_bytes_at_gc GC_arrays._non_gc_bytes_at_gc
|
|
# define GC_mem_freed GC_arrays._mem_freed
|
|
# define GC_scratch_end_ptr GC_arrays._scratch_end_ptr
|
|
# define GC_scratch_last_end_ptr GC_arrays._scratch_last_end_ptr
|
|
# define GC_mark_procs GC_arrays._mark_procs
|
|
# define GC_heapsize GC_arrays._heapsize
|
|
# define GC_max_heapsize GC_arrays._max_heapsize
|
|
# define GC_requested_heapsize GC_arrays._requested_heapsize
|
|
# define GC_words_allocd_before_gc GC_arrays._words_allocd_before_gc
|
|
# define GC_heap_sects GC_arrays._heap_sects
|
|
# define GC_last_stack GC_arrays._last_stack
|
|
# ifdef USE_MUNMAP
|
|
# define GC_unmapped_bytes GC_arrays._unmapped_bytes
|
|
# endif
|
|
# if defined(MSWIN32) || defined(MSWINCE)
|
|
# define GC_heap_bases GC_arrays._heap_bases
|
|
# endif
|
|
# ifdef MSWINCE
|
|
# define GC_heap_lengths GC_arrays._heap_lengths
|
|
# endif
|
|
# define GC_static_roots GC_arrays._static_roots
|
|
# define GC_root_index GC_arrays._root_index
|
|
# define GC_excl_table GC_arrays._excl_table
|
|
# define GC_all_nils GC_arrays._all_nils
|
|
# define GC_top_index GC_arrays._top_index
|
|
# if defined(PROC_VDB) || defined(MPROTECT_VDB)
|
|
# define GC_grungy_pages GC_arrays._grungy_pages
|
|
# endif
|
|
# ifdef MPROTECT_VDB
|
|
# define GC_dirty_pages GC_arrays._dirty_pages
|
|
# endif
|
|
# ifdef PROC_VDB
|
|
# define GC_written_pages GC_arrays._written_pages
|
|
# endif
|
|
# ifdef GATHERSTATS
|
|
# define GC_composite_in_use GC_arrays._composite_in_use
|
|
# define GC_atomic_in_use GC_arrays._atomic_in_use
|
|
# endif
|
|
# ifdef MERGE_SIZES
|
|
# define GC_size_map GC_arrays._size_map
|
|
# endif
|
|
|
|
# define beginGC_arrays ((ptr_t)(&GC_arrays))
|
|
# define endGC_arrays (((ptr_t)(&GC_arrays)) + (sizeof GC_arrays))
|
|
|
|
#define USED_HEAP_SIZE (GC_heapsize - GC_large_free_bytes)
|
|
|
|
/* Object kinds: */
|
|
# define MAXOBJKINDS 16
|
|
|
|
extern struct obj_kind {
|
|
ptr_t *ok_freelist; /* Array of free listheaders for this kind of object */
|
|
/* Point either to GC_arrays or to storage allocated */
|
|
/* with GC_scratch_alloc. */
|
|
struct hblk **ok_reclaim_list;
|
|
/* List headers for lists of blocks waiting to be */
|
|
/* swept. */
|
|
word ok_descriptor; /* Descriptor template for objects in this */
|
|
/* block. */
|
|
GC_bool ok_relocate_descr;
|
|
/* Add object size in bytes to descriptor */
|
|
/* template to obtain descriptor. Otherwise */
|
|
/* template is used as is. */
|
|
GC_bool ok_init; /* Clear objects before putting them on the free list. */
|
|
} GC_obj_kinds[MAXOBJKINDS];
|
|
|
|
# define beginGC_obj_kinds ((ptr_t)(&GC_obj_kinds))
|
|
# define endGC_obj_kinds (beginGC_obj_kinds + (sizeof GC_obj_kinds))
|
|
|
|
/* Variables that used to be in GC_arrays, but need to be accessed by */
|
|
/* inline allocation code. If they were in GC_arrays, the inlined */
|
|
/* allocation code would include GC_arrays offsets (as it did), which */
|
|
/* introduce maintenance problems. */
|
|
|
|
#ifdef SEPARATE_GLOBALS
|
|
word GC_words_allocd;
|
|
/* Number of words allocated during this collection cycle */
|
|
ptr_t GC_objfreelist[MAXOBJSZ+1];
|
|
/* free list for NORMAL objects */
|
|
# define beginGC_objfreelist ((ptr_t)(&GC_objfreelist))
|
|
# define endGC_objfreelist (beginGC_objfreelist + sizeof(GC_objfreelist))
|
|
|
|
ptr_t GC_aobjfreelist[MAXOBJSZ+1];
|
|
/* free list for atomic (PTRFREE) objs */
|
|
# define beginGC_aobjfreelist ((ptr_t)(&GC_aobjfreelist))
|
|
# define endGC_aobjfreelist (beginGC_aobjfreelist + sizeof(GC_aobjfreelist))
|
|
#endif
|
|
|
|
/* Predefined kinds: */
|
|
# define PTRFREE 0
|
|
# define NORMAL 1
|
|
# define UNCOLLECTABLE 2
|
|
# ifdef ATOMIC_UNCOLLECTABLE
|
|
# define AUNCOLLECTABLE 3
|
|
# define STUBBORN 4
|
|
# define IS_UNCOLLECTABLE(k) (((k) & ~1) == UNCOLLECTABLE)
|
|
# else
|
|
# define STUBBORN 3
|
|
# define IS_UNCOLLECTABLE(k) ((k) == UNCOLLECTABLE)
|
|
# endif
|
|
|
|
extern int GC_n_kinds;
|
|
|
|
GC_API word GC_fo_entries;
|
|
|
|
extern word GC_n_heap_sects; /* Number of separately added heap */
|
|
/* sections. */
|
|
|
|
extern word GC_page_size;
|
|
|
|
# if defined(MSWIN32) || defined(MSWINCE)
|
|
struct _SYSTEM_INFO;
|
|
extern struct _SYSTEM_INFO GC_sysinfo;
|
|
extern word GC_n_heap_bases; /* See GC_heap_bases. */
|
|
# endif
|
|
|
|
extern word GC_total_stack_black_listed;
|
|
/* Number of bytes on stack blacklist. */
|
|
|
|
extern word GC_black_list_spacing;
|
|
/* Average number of bytes between blacklisted */
|
|
/* blocks. Approximate. */
|
|
/* Counts only blocks that are */
|
|
/* "stack-blacklisted", i.e. that are */
|
|
/* problematic in the interior of an object. */
|
|
|
|
extern map_entry_type * GC_invalid_map;
|
|
/* Pointer to the nowhere valid hblk map */
|
|
/* Blocks pointing to this map are free. */
|
|
|
|
extern struct hblk * GC_hblkfreelist[];
|
|
/* List of completely empty heap blocks */
|
|
/* Linked through hb_next field of */
|
|
/* header structure associated with */
|
|
/* block. */
|
|
|
|
extern GC_bool GC_is_initialized; /* GC_init() has been run. */
|
|
|
|
extern GC_bool GC_objects_are_marked; /* There are marked objects in */
|
|
/* the heap. */
|
|
|
|
#ifndef SMALL_CONFIG
|
|
extern GC_bool GC_incremental;
|
|
/* Using incremental/generational collection. */
|
|
#else
|
|
# define GC_incremental FALSE
|
|
/* Hopefully allow optimizer to remove some code. */
|
|
#endif
|
|
|
|
extern GC_bool GC_dirty_maintained;
|
|
/* Dirty bits are being maintained, */
|
|
/* either for incremental collection, */
|
|
/* or to limit the root set. */
|
|
|
|
extern word GC_root_size; /* Total size of registered root sections */
|
|
|
|
extern GC_bool GC_debugging_started; /* GC_debug_malloc has been called. */
|
|
|
|
extern long GC_large_alloc_warn_interval;
|
|
/* Interval between unsuppressed warnings. */
|
|
|
|
extern long GC_large_alloc_warn_suppressed;
|
|
/* Number of warnings suppressed so far. */
|
|
|
|
/* Operations */
|
|
# ifndef abs
|
|
# define abs(x) ((x) < 0? (-(x)) : (x))
|
|
# endif
|
|
|
|
|
|
/* Marks are in a reserved area in */
|
|
/* each heap block. Each word has one mark bit associated */
|
|
/* with it. Only those corresponding to the beginning of an */
|
|
/* object are used. */
|
|
|
|
/* Set mark bit correctly, even if mark bits may be concurrently */
|
|
/* accessed. */
|
|
#ifdef PARALLEL_MARK
|
|
# define OR_WORD(addr, bits) \
|
|
{ word old; \
|
|
do { \
|
|
old = *((volatile word *)addr); \
|
|
} while (!GC_compare_and_exchange((addr), old, old | (bits))); \
|
|
}
|
|
# define OR_WORD_EXIT_IF_SET(addr, bits, exit_label) \
|
|
{ word old; \
|
|
word my_bits = (bits); \
|
|
do { \
|
|
old = *((volatile word *)addr); \
|
|
if (old & my_bits) goto exit_label; \
|
|
} while (!GC_compare_and_exchange((addr), old, old | my_bits)); \
|
|
}
|
|
#else
|
|
# define OR_WORD(addr, bits) *(addr) |= (bits)
|
|
# define OR_WORD_EXIT_IF_SET(addr, bits, exit_label) \
|
|
{ \
|
|
word old = *(addr); \
|
|
word my_bits = (bits); \
|
|
if (old & my_bits) goto exit_label; \
|
|
*(addr) = (old | my_bits); \
|
|
}
|
|
#endif
|
|
|
|
/* Mark bit operations */
|
|
|
|
/*
|
|
* Retrieve, set, clear the mark bit corresponding
|
|
* to the nth word in a given heap block.
|
|
*
|
|
* (Recall that bit n corresponds to object beginning at word n
|
|
* relative to the beginning of the block, including unused words)
|
|
*/
|
|
|
|
#ifdef USE_MARK_BYTES
|
|
# define mark_bit_from_hdr(hhdr,n) ((hhdr)->hb_marks[(n) >> 1])
|
|
# define set_mark_bit_from_hdr(hhdr,n) ((hhdr)->hb_marks[(n)>>1]) = 1
|
|
# define clear_mark_bit_from_hdr(hhdr,n) ((hhdr)->hb_marks[(n)>>1]) = 0
|
|
#else /* !USE_MARK_BYTES */
|
|
# define mark_bit_from_hdr(hhdr,n) (((hhdr)->hb_marks[divWORDSZ(n)] \
|
|
>> (modWORDSZ(n))) & (word)1)
|
|
# define set_mark_bit_from_hdr(hhdr,n) \
|
|
OR_WORD((hhdr)->hb_marks+divWORDSZ(n), \
|
|
(word)1 << modWORDSZ(n))
|
|
# define clear_mark_bit_from_hdr(hhdr,n) (hhdr)->hb_marks[divWORDSZ(n)] \
|
|
&= ~((word)1 << modWORDSZ(n))
|
|
#endif /* !USE_MARK_BYTES */
|
|
|
|
/* Important internal collector routines */
|
|
|
|
ptr_t GC_approx_sp GC_PROTO((void));
|
|
|
|
GC_bool GC_should_collect GC_PROTO((void));
|
|
|
|
void GC_apply_to_all_blocks GC_PROTO(( \
|
|
void (*fn) GC_PROTO((struct hblk *h, word client_data)), \
|
|
word client_data));
|
|
/* Invoke fn(hbp, client_data) for each */
|
|
/* allocated heap block. */
|
|
struct hblk * GC_next_used_block GC_PROTO((struct hblk * h));
|
|
/* Return first in-use block >= h */
|
|
struct hblk * GC_prev_block GC_PROTO((struct hblk * h));
|
|
/* Return last block <= h. Returned block */
|
|
/* is managed by GC, but may or may not be in */
|
|
/* use. */
|
|
void GC_mark_init GC_PROTO((void));
|
|
void GC_clear_marks GC_PROTO((void)); /* Clear mark bits for all heap objects. */
|
|
void GC_invalidate_mark_state GC_PROTO((void));
|
|
/* Tell the marker that marked */
|
|
/* objects may point to unmarked */
|
|
/* ones, and roots may point to */
|
|
/* unmarked objects. */
|
|
/* Reset mark stack. */
|
|
GC_bool GC_mark_stack_empty GC_PROTO((void));
|
|
GC_bool GC_mark_some GC_PROTO((ptr_t cold_gc_frame));
|
|
/* Perform about one pages worth of marking */
|
|
/* work of whatever kind is needed. Returns */
|
|
/* quickly if no collection is in progress. */
|
|
/* Return TRUE if mark phase finished. */
|
|
void GC_initiate_gc GC_PROTO((void));
|
|
/* initiate collection. */
|
|
/* If the mark state is invalid, this */
|
|
/* becomes full colleection. Otherwise */
|
|
/* it's partial. */
|
|
void GC_push_all GC_PROTO((ptr_t bottom, ptr_t top));
|
|
/* Push everything in a range */
|
|
/* onto mark stack. */
|
|
void GC_push_selected GC_PROTO(( \
|
|
ptr_t bottom, \
|
|
ptr_t top, \
|
|
int (*dirty_fn) GC_PROTO((struct hblk *h)), \
|
|
void (*push_fn) GC_PROTO((ptr_t bottom, ptr_t top)) ));
|
|
/* Push all pages h in [b,t) s.t. */
|
|
/* select_fn(h) != 0 onto mark stack. */
|
|
#ifndef SMALL_CONFIG
|
|
void GC_push_conditional GC_PROTO((ptr_t b, ptr_t t, GC_bool all));
|
|
#else
|
|
# define GC_push_conditional(b, t, all) GC_push_all(b, t)
|
|
#endif
|
|
/* Do either of the above, depending */
|
|
/* on the third arg. */
|
|
void GC_push_all_stack GC_PROTO((ptr_t b, ptr_t t));
|
|
/* As above, but consider */
|
|
/* interior pointers as valid */
|
|
void GC_push_all_eager GC_PROTO((ptr_t b, ptr_t t));
|
|
/* Same as GC_push_all_stack, but */
|
|
/* ensures that stack is scanned */
|
|
/* immediately, not just scheduled */
|
|
/* for scanning. */
|
|
#ifndef THREADS
|
|
void GC_push_all_stack_partially_eager GC_PROTO(( \
|
|
ptr_t bottom, ptr_t top, ptr_t cold_gc_frame ));
|
|
/* Similar to GC_push_all_eager, but only the */
|
|
/* part hotter than cold_gc_frame is scanned */
|
|
/* immediately. Needed to ensure that callee- */
|
|
/* save registers are not missed. */
|
|
#else
|
|
/* In the threads case, we push part of the current thread stack */
|
|
/* with GC_push_all_eager when we push the registers. This gets the */
|
|
/* callee-save registers that may disappear. The remainder of the */
|
|
/* stacks are scheduled for scanning in *GC_push_other_roots, which */
|
|
/* is thread-package-specific. */
|
|
#endif
|
|
void GC_push_current_stack GC_PROTO((ptr_t cold_gc_frame));
|
|
/* Push enough of the current stack eagerly to */
|
|
/* ensure that callee-save registers saved in */
|
|
/* GC frames are scanned. */
|
|
/* In the non-threads case, schedule entire */
|
|
/* stack for scanning. */
|
|
void GC_push_roots GC_PROTO((GC_bool all, ptr_t cold_gc_frame));
|
|
/* Push all or dirty roots. */
|
|
extern void (*GC_push_other_roots) GC_PROTO((void));
|
|
/* Push system or application specific roots */
|
|
/* onto the mark stack. In some environments */
|
|
/* (e.g. threads environments) this is */
|
|
/* predfined to be non-zero. A client supplied */
|
|
/* replacement should also call the original */
|
|
/* function. */
|
|
extern void GC_push_gc_structures GC_PROTO((void));
|
|
/* Push GC internal roots. These are normally */
|
|
/* included in the static data segment, and */
|
|
/* Thus implicitly pushed. But we must do this */
|
|
/* explicitly if normal root processing is */
|
|
/* disabled. Calls the following: */
|
|
extern void GC_push_finalizer_structures GC_PROTO((void));
|
|
extern void GC_push_stubborn_structures GC_PROTO((void));
|
|
# ifdef THREADS
|
|
extern void GC_push_thread_structures GC_PROTO((void));
|
|
# endif
|
|
extern void (*GC_start_call_back) GC_PROTO((void));
|
|
/* Called at start of full collections. */
|
|
/* Not called if 0. Called with allocation */
|
|
/* lock held. */
|
|
/* 0 by default. */
|
|
# if defined(USE_GENERIC_PUSH_REGS)
|
|
void GC_generic_push_regs GC_PROTO((ptr_t cold_gc_frame));
|
|
# else
|
|
void GC_push_regs GC_PROTO((void));
|
|
# endif
|
|
/* Push register contents onto mark stack. */
|
|
/* If NURSERY is defined, the default push */
|
|
/* action can be overridden with GC_push_proc */
|
|
|
|
# ifdef NURSERY
|
|
extern void (*GC_push_proc)(ptr_t);
|
|
# endif
|
|
# if defined(MSWIN32) || defined(MSWINCE)
|
|
void __cdecl GC_push_one GC_PROTO((word p));
|
|
# else
|
|
void GC_push_one GC_PROTO((word p));
|
|
/* If p points to an object, mark it */
|
|
/* and push contents on the mark stack */
|
|
/* Pointer recognition test always */
|
|
/* accepts interior pointers, i.e. this */
|
|
/* is appropriate for pointers found on */
|
|
/* stack. */
|
|
# endif
|
|
# if defined(PRINT_BLACK_LIST) || defined(KEEP_BACK_PTRS)
|
|
void GC_mark_and_push_stack GC_PROTO((word p, ptr_t source));
|
|
/* Ditto, omits plausibility test */
|
|
# else
|
|
void GC_mark_and_push_stack GC_PROTO((word p));
|
|
# endif
|
|
void GC_push_marked GC_PROTO((struct hblk * h, hdr * hhdr));
|
|
/* Push contents of all marked objects in h onto */
|
|
/* mark stack. */
|
|
#ifdef SMALL_CONFIG
|
|
# define GC_push_next_marked_dirty(h) GC_push_next_marked(h)
|
|
#else
|
|
struct hblk * GC_push_next_marked_dirty GC_PROTO((struct hblk * h));
|
|
/* Invoke GC_push_marked on next dirty block above h. */
|
|
/* Return a pointer just past the end of this block. */
|
|
#endif /* !SMALL_CONFIG */
|
|
struct hblk * GC_push_next_marked GC_PROTO((struct hblk * h));
|
|
/* Ditto, but also mark from clean pages. */
|
|
struct hblk * GC_push_next_marked_uncollectable GC_PROTO((struct hblk * h));
|
|
/* Ditto, but mark only from uncollectable pages. */
|
|
GC_bool GC_stopped_mark GC_PROTO((GC_stop_func stop_func));
|
|
/* Stop world and mark from all roots */
|
|
/* and rescuers. */
|
|
void GC_clear_hdr_marks GC_PROTO((hdr * hhdr));
|
|
/* Clear the mark bits in a header */
|
|
void GC_set_hdr_marks GC_PROTO((hdr * hhdr));
|
|
/* Set the mark bits in a header */
|
|
void GC_set_fl_marks GC_PROTO((ptr_t p));
|
|
/* Set all mark bits associated with */
|
|
/* a free list. */
|
|
void GC_add_roots_inner GC_PROTO((char * b, char * e, GC_bool tmp));
|
|
GC_bool GC_is_static_root GC_PROTO((ptr_t p));
|
|
/* Is the address p in one of the registered static */
|
|
/* root sections? */
|
|
# if defined(MSWIN32) || defined(_WIN32_WCE_EMULATION)
|
|
GC_bool GC_is_tmp_root GC_PROTO((ptr_t p));
|
|
/* Is the address p in one of the temporary static */
|
|
/* root sections? */
|
|
# endif
|
|
void GC_register_dynamic_libraries GC_PROTO((void));
|
|
/* Add dynamic library data sections to the root set. */
|
|
|
|
GC_bool GC_register_main_static_data GC_PROTO((void));
|
|
/* We need to register the main data segment. Returns */
|
|
/* TRUE unless this is done implicitly as part of */
|
|
/* dynamic library registration. */
|
|
|
|
/* Machine dependent startup routines */
|
|
ptr_t GC_get_stack_base GC_PROTO((void)); /* Cold end of stack */
|
|
#ifdef IA64
|
|
ptr_t GC_get_register_stack_base GC_PROTO((void));
|
|
/* Cold end of register stack. */
|
|
#endif
|
|
void GC_register_data_segments GC_PROTO((void));
|
|
|
|
/* Black listing: */
|
|
void GC_bl_init GC_PROTO((void));
|
|
# ifdef PRINT_BLACK_LIST
|
|
void GC_add_to_black_list_normal GC_PROTO((word p, ptr_t source));
|
|
/* Register bits as a possible future false */
|
|
/* reference from the heap or static data */
|
|
# define GC_ADD_TO_BLACK_LIST_NORMAL(bits, source) \
|
|
if (GC_all_interior_pointers) { \
|
|
GC_add_to_black_list_stack(bits, (ptr_t)(source)); \
|
|
} else { \
|
|
GC_add_to_black_list_normal(bits, (ptr_t)(source)); \
|
|
}
|
|
# else
|
|
void GC_add_to_black_list_normal GC_PROTO((word p));
|
|
# define GC_ADD_TO_BLACK_LIST_NORMAL(bits, source) \
|
|
if (GC_all_interior_pointers) { \
|
|
GC_add_to_black_list_stack(bits); \
|
|
} else { \
|
|
GC_add_to_black_list_normal(bits); \
|
|
}
|
|
# endif
|
|
|
|
# ifdef PRINT_BLACK_LIST
|
|
void GC_add_to_black_list_stack GC_PROTO((word p, ptr_t source));
|
|
# else
|
|
void GC_add_to_black_list_stack GC_PROTO((word p));
|
|
# endif
|
|
struct hblk * GC_is_black_listed GC_PROTO((struct hblk * h, word len));
|
|
/* If there are likely to be false references */
|
|
/* to a block starting at h of the indicated */
|
|
/* length, then return the next plausible */
|
|
/* starting location for h that might avoid */
|
|
/* these false references. */
|
|
void GC_promote_black_lists GC_PROTO((void));
|
|
/* Declare an end to a black listing phase. */
|
|
void GC_unpromote_black_lists GC_PROTO((void));
|
|
/* Approximately undo the effect of the above. */
|
|
/* This actually loses some information, but */
|
|
/* only in a reasonably safe way. */
|
|
word GC_number_stack_black_listed GC_PROTO(( \
|
|
struct hblk *start, struct hblk *endp1));
|
|
/* Return the number of (stack) blacklisted */
|
|
/* blocks in the range for statistical */
|
|
/* purposes. */
|
|
|
|
ptr_t GC_scratch_alloc GC_PROTO((word bytes));
|
|
/* GC internal memory allocation for */
|
|
/* small objects. Deallocation is not */
|
|
/* possible. */
|
|
|
|
/* Heap block layout maps: */
|
|
void GC_invalidate_map GC_PROTO((hdr * hhdr));
|
|
/* Remove the object map associated */
|
|
/* with the block. This identifies */
|
|
/* the block as invalid to the mark */
|
|
/* routines. */
|
|
GC_bool GC_add_map_entry GC_PROTO((word sz));
|
|
/* Add a heap block map for objects of */
|
|
/* size sz to obj_map. */
|
|
/* Return FALSE on failure. */
|
|
void GC_register_displacement_inner GC_PROTO((word offset));
|
|
/* Version of GC_register_displacement */
|
|
/* that assumes lock is already held */
|
|
/* and signals are already disabled. */
|
|
|
|
/* hblk allocation: */
|
|
void GC_new_hblk GC_PROTO((word size_in_words, int kind));
|
|
/* Allocate a new heap block, and build */
|
|
/* a free list in it. */
|
|
|
|
ptr_t GC_build_fl GC_PROTO((struct hblk *h, word sz,
|
|
GC_bool clear, ptr_t list));
|
|
/* Build a free list for objects of */
|
|
/* size sz in block h. Append list to */
|
|
/* end of the free lists. Possibly */
|
|
/* clear objects on the list. Normally */
|
|
/* called by GC_new_hblk, but also */
|
|
/* called explicitly without GC lock. */
|
|
|
|
struct hblk * GC_allochblk GC_PROTO(( \
|
|
word size_in_words, int kind, unsigned flags));
|
|
/* Allocate a heap block, inform */
|
|
/* the marker that block is valid */
|
|
/* for objects of indicated size. */
|
|
|
|
ptr_t GC_alloc_large GC_PROTO((word lw, int k, unsigned flags));
|
|
/* Allocate a large block of size lw words. */
|
|
/* The block is not cleared. */
|
|
/* Flags is 0 or IGNORE_OFF_PAGE. */
|
|
/* Calls GC_allchblk to do the actual */
|
|
/* allocation, but also triggers GC and/or */
|
|
/* heap expansion as appropriate. */
|
|
/* Does not update GC_words_allocd, but does */
|
|
/* other accounting. */
|
|
|
|
ptr_t GC_alloc_large_and_clear GC_PROTO((word lw, int k, unsigned flags));
|
|
/* As above, but clear block if appropriate */
|
|
/* for kind k. */
|
|
|
|
void GC_freehblk GC_PROTO((struct hblk * p));
|
|
/* Deallocate a heap block and mark it */
|
|
/* as invalid. */
|
|
|
|
/* Misc GC: */
|
|
void GC_init_inner GC_PROTO((void));
|
|
GC_bool GC_expand_hp_inner GC_PROTO((word n));
|
|
void GC_start_reclaim GC_PROTO((int abort_if_found));
|
|
/* Restore unmarked objects to free */
|
|
/* lists, or (if abort_if_found is */
|
|
/* TRUE) report them. */
|
|
/* Sweeping of small object pages is */
|
|
/* largely deferred. */
|
|
void GC_continue_reclaim GC_PROTO((word sz, int kind));
|
|
/* Sweep pages of the given size and */
|
|
/* kind, as long as possible, and */
|
|
/* as long as the corr. free list is */
|
|
/* empty. */
|
|
void GC_reclaim_or_delete_all GC_PROTO((void));
|
|
/* Arrange for all reclaim lists to be */
|
|
/* empty. Judiciously choose between */
|
|
/* sweeping and discarding each page. */
|
|
GC_bool GC_reclaim_all GC_PROTO((GC_stop_func stop_func, GC_bool ignore_old));
|
|
/* Reclaim all blocks. Abort (in a */
|
|
/* consistent state) if f returns TRUE. */
|
|
GC_bool GC_block_empty GC_PROTO((hdr * hhdr));
|
|
/* Block completely unmarked? */
|
|
GC_bool GC_never_stop_func GC_PROTO((void));
|
|
/* Returns FALSE. */
|
|
GC_bool GC_try_to_collect_inner GC_PROTO((GC_stop_func f));
|
|
|
|
/* Collect; caller must have acquired */
|
|
/* lock and disabled signals. */
|
|
/* Collection is aborted if f returns */
|
|
/* TRUE. Returns TRUE if it completes */
|
|
/* successfully. */
|
|
# define GC_gcollect_inner() \
|
|
(void) GC_try_to_collect_inner(GC_never_stop_func)
|
|
void GC_finish_collection GC_PROTO((void));
|
|
/* Finish collection. Mark bits are */
|
|
/* consistent and lock is still held. */
|
|
GC_bool GC_collect_or_expand GC_PROTO(( \
|
|
word needed_blocks, GC_bool ignore_off_page));
|
|
/* Collect or expand heap in an attempt */
|
|
/* make the indicated number of free */
|
|
/* blocks available. Should be called */
|
|
/* until the blocks are available or */
|
|
/* until it fails by returning FALSE. */
|
|
|
|
#if defined(MSWIN32) || defined(MSWINCE)
|
|
void GC_deinit GC_PROTO((void));
|
|
/* Free any resources allocated by */
|
|
/* GC_init */
|
|
#endif
|
|
|
|
void GC_collect_a_little_inner GC_PROTO((int n));
|
|
/* Do n units worth of garbage */
|
|
/* collection work, if appropriate. */
|
|
/* A unit is an amount appropriate for */
|
|
/* HBLKSIZE bytes of allocation. */
|
|
ptr_t GC_generic_malloc GC_PROTO((word lb, int k));
|
|
/* Allocate an object of the given */
|
|
/* kind. By default, there are only */
|
|
/* a few kinds: composite(pointerfree), */
|
|
/* atomic, uncollectable, etc. */
|
|
/* We claim it's possible for clever */
|
|
/* client code that understands GC */
|
|
/* internals to add more, e.g. to */
|
|
/* communicate object layout info */
|
|
/* to the collector. */
|
|
ptr_t GC_generic_malloc_ignore_off_page GC_PROTO((size_t b, int k));
|
|
/* As above, but pointers past the */
|
|
/* first page of the resulting object */
|
|
/* are ignored. */
|
|
ptr_t GC_generic_malloc_inner GC_PROTO((word lb, int k));
|
|
/* Ditto, but I already hold lock, etc. */
|
|
ptr_t GC_generic_malloc_words_small GC_PROTO((size_t lw, int k));
|
|
/* As above, but size in units of words */
|
|
/* Bypasses MERGE_SIZES. Assumes */
|
|
/* words <= MAXOBJSZ. */
|
|
ptr_t GC_generic_malloc_inner_ignore_off_page GC_PROTO((size_t lb, int k));
|
|
/* Allocate an object, where */
|
|
/* the client guarantees that there */
|
|
/* will always be a pointer to the */
|
|
/* beginning of the object while the */
|
|
/* object is live. */
|
|
ptr_t GC_allocobj GC_PROTO((word sz, int kind));
|
|
/* Make the indicated */
|
|
/* free list nonempty, and return its */
|
|
/* head. */
|
|
|
|
void GC_init_headers GC_PROTO((void));
|
|
struct hblkhdr * GC_install_header GC_PROTO((struct hblk *h));
|
|
/* Install a header for block h. */
|
|
/* Return 0 on failure, or the header */
|
|
/* otherwise. */
|
|
GC_bool GC_install_counts GC_PROTO((struct hblk * h, word sz));
|
|
/* Set up forwarding counts for block */
|
|
/* h of size sz. */
|
|
/* Return FALSE on failure. */
|
|
void GC_remove_header GC_PROTO((struct hblk * h));
|
|
/* Remove the header for block h. */
|
|
void GC_remove_counts GC_PROTO((struct hblk * h, word sz));
|
|
/* Remove forwarding counts for h. */
|
|
hdr * GC_find_header GC_PROTO((ptr_t h)); /* Debugging only. */
|
|
|
|
void GC_finalize GC_PROTO((void));
|
|
/* Perform all indicated finalization actions */
|
|
/* on unmarked objects. */
|
|
/* Unreachable finalizable objects are enqueued */
|
|
/* for processing by GC_invoke_finalizers. */
|
|
/* Invoked with lock. */
|
|
|
|
void GC_notify_or_invoke_finalizers GC_PROTO((void));
|
|
/* If GC_finalize_on_demand is not set, invoke */
|
|
/* eligible finalizers. Otherwise: */
|
|
/* Call *GC_finalizer_notifier if there are */
|
|
/* finalizers to be run, and we haven't called */
|
|
/* this procedure yet this GC cycle. */
|
|
|
|
void GC_add_to_heap GC_PROTO((struct hblk *p, word bytes));
|
|
/* Add a HBLKSIZE aligned chunk to the heap. */
|
|
|
|
void GC_print_obj GC_PROTO((ptr_t p));
|
|
/* P points to somewhere inside an object with */
|
|
/* debugging info. Print a human readable */
|
|
/* description of the object to stderr. */
|
|
extern void (*GC_check_heap) GC_PROTO((void));
|
|
/* Check that all objects in the heap with */
|
|
/* debugging info are intact. Print */
|
|
/* descriptions of any that are not. */
|
|
extern void (*GC_print_heap_obj) GC_PROTO((ptr_t p));
|
|
/* If possible print s followed by a more */
|
|
/* detailed description of the object */
|
|
/* referred to by p. */
|
|
|
|
extern GC_bool GC_print_stats; /* Produce at least some logging output */
|
|
/* Set from environment variable. */
|
|
|
|
/* Macros used for collector internal allocation. */
|
|
/* These assume the collector lock is held. */
|
|
#ifdef DBG_HDRS_ALL
|
|
extern GC_PTR GC_debug_generic_malloc_inner(size_t lb, int k);
|
|
extern GC_PTR GC_debug_generic_malloc_inner_ignore_off_page(size_t lb,
|
|
int k);
|
|
# define GC_INTERNAL_MALLOC GC_debug_generic_malloc_inner
|
|
# define GC_INTERNAL_MALLOC_IGNORE_OFF_PAGE \
|
|
GC_debug_generic_malloc_inner_ignore_off_page
|
|
# ifdef THREADS
|
|
# define GC_INTERNAL_FREE GC_debug_free_inner
|
|
# else
|
|
# define GC_INTERNAL_FREE GC_debug_free
|
|
# endif
|
|
#else
|
|
# define GC_INTERNAL_MALLOC GC_generic_malloc_inner
|
|
# define GC_INTERNAL_MALLOC_IGNORE_OFF_PAGE \
|
|
GC_generic_malloc_inner_ignore_off_page
|
|
# ifdef THREADS
|
|
# define GC_INTERNAL_FREE GC_free_inner
|
|
# else
|
|
# define GC_INTERNAL_FREE GC_free
|
|
# endif
|
|
#endif
|
|
|
|
/* Memory unmapping: */
|
|
#ifdef USE_MUNMAP
|
|
void GC_unmap_old(void);
|
|
void GC_merge_unmapped(void);
|
|
void GC_unmap(ptr_t start, word bytes);
|
|
void GC_remap(ptr_t start, word bytes);
|
|
void GC_unmap_gap(ptr_t start1, word bytes1, ptr_t start2, word bytes2);
|
|
#endif
|
|
|
|
/* Virtual dirty bit implementation: */
|
|
/* Each implementation exports the following: */
|
|
void GC_read_dirty GC_PROTO((void));
|
|
/* Retrieve dirty bits. */
|
|
GC_bool GC_page_was_dirty GC_PROTO((struct hblk *h));
|
|
/* Read retrieved dirty bits. */
|
|
GC_bool GC_page_was_ever_dirty GC_PROTO((struct hblk *h));
|
|
/* Could the page contain valid heap pointers? */
|
|
void GC_is_fresh GC_PROTO((struct hblk *h, word n));
|
|
/* Assert the region currently contains no */
|
|
/* valid pointers. */
|
|
void GC_remove_protection GC_PROTO((struct hblk *h, word nblocks,
|
|
GC_bool pointerfree));
|
|
/* h is about to be writteni or allocated. Ensure */
|
|
/* that it's not write protected by the virtual */
|
|
/* dirty bit implementation. */
|
|
|
|
void GC_dirty_init GC_PROTO((void));
|
|
|
|
/* Slow/general mark bit manipulation: */
|
|
GC_API GC_bool GC_is_marked GC_PROTO((ptr_t p));
|
|
void GC_clear_mark_bit GC_PROTO((ptr_t p));
|
|
void GC_set_mark_bit GC_PROTO((ptr_t p));
|
|
|
|
/* Stubborn objects: */
|
|
void GC_read_changed GC_PROTO((void)); /* Analogous to GC_read_dirty */
|
|
GC_bool GC_page_was_changed GC_PROTO((struct hblk * h));
|
|
/* Analogous to GC_page_was_dirty */
|
|
void GC_clean_changing_list GC_PROTO((void));
|
|
/* Collect obsolete changing list entries */
|
|
void GC_stubborn_init GC_PROTO((void));
|
|
|
|
/* Debugging print routines: */
|
|
void GC_print_block_list GC_PROTO((void));
|
|
void GC_print_hblkfreelist GC_PROTO((void));
|
|
void GC_print_heap_sects GC_PROTO((void));
|
|
void GC_print_static_roots GC_PROTO((void));
|
|
void GC_dump GC_PROTO((void));
|
|
|
|
#ifdef KEEP_BACK_PTRS
|
|
void GC_store_back_pointer(ptr_t source, ptr_t dest);
|
|
void GC_marked_for_finalization(ptr_t dest);
|
|
# define GC_STORE_BACK_PTR(source, dest) GC_store_back_pointer(source, dest)
|
|
# define GC_MARKED_FOR_FINALIZATION(dest) GC_marked_for_finalization(dest)
|
|
#else
|
|
# define GC_STORE_BACK_PTR(source, dest)
|
|
# define GC_MARKED_FOR_FINALIZATION(dest)
|
|
#endif
|
|
|
|
/* Make arguments appear live to compiler */
|
|
# ifdef __WATCOMC__
|
|
void GC_noop(void*, ...);
|
|
# else
|
|
# ifdef __DMC__
|
|
GC_API void GC_noop(...);
|
|
# else
|
|
GC_API void GC_noop();
|
|
# endif
|
|
# endif
|
|
|
|
void GC_noop1 GC_PROTO((word));
|
|
|
|
/* Logging and diagnostic output: */
|
|
GC_API void GC_printf GC_PROTO((GC_CONST char * format, long, long, long, long, long, long));
|
|
/* A version of printf that doesn't allocate, */
|
|
/* is restricted to long arguments, and */
|
|
/* (unfortunately) doesn't use varargs for */
|
|
/* portability. Restricted to 6 args and */
|
|
/* 1K total output length. */
|
|
/* (We use sprintf. Hopefully that doesn't */
|
|
/* allocate for long arguments.) */
|
|
# define GC_printf0(f) GC_printf(f, 0l, 0l, 0l, 0l, 0l, 0l)
|
|
# define GC_printf1(f,a) GC_printf(f, (long)a, 0l, 0l, 0l, 0l, 0l)
|
|
# define GC_printf2(f,a,b) GC_printf(f, (long)a, (long)b, 0l, 0l, 0l, 0l)
|
|
# define GC_printf3(f,a,b,c) GC_printf(f, (long)a, (long)b, (long)c, 0l, 0l, 0l)
|
|
# define GC_printf4(f,a,b,c,d) GC_printf(f, (long)a, (long)b, (long)c, \
|
|
(long)d, 0l, 0l)
|
|
# define GC_printf5(f,a,b,c,d,e) GC_printf(f, (long)a, (long)b, (long)c, \
|
|
(long)d, (long)e, 0l)
|
|
# define GC_printf6(f,a,b,c,d,e,g) GC_printf(f, (long)a, (long)b, (long)c, \
|
|
(long)d, (long)e, (long)g)
|
|
|
|
GC_API void GC_err_printf GC_PROTO((GC_CONST char * format, long, long, long, long, long, long));
|
|
# define GC_err_printf0(f) GC_err_puts(f)
|
|
# define GC_err_printf1(f,a) GC_err_printf(f, (long)a, 0l, 0l, 0l, 0l, 0l)
|
|
# define GC_err_printf2(f,a,b) GC_err_printf(f, (long)a, (long)b, 0l, 0l, 0l, 0l)
|
|
# define GC_err_printf3(f,a,b,c) GC_err_printf(f, (long)a, (long)b, (long)c, \
|
|
0l, 0l, 0l)
|
|
# define GC_err_printf4(f,a,b,c,d) GC_err_printf(f, (long)a, (long)b, \
|
|
(long)c, (long)d, 0l, 0l)
|
|
# define GC_err_printf5(f,a,b,c,d,e) GC_err_printf(f, (long)a, (long)b, \
|
|
(long)c, (long)d, \
|
|
(long)e, 0l)
|
|
# define GC_err_printf6(f,a,b,c,d,e,g) GC_err_printf(f, (long)a, (long)b, \
|
|
(long)c, (long)d, \
|
|
(long)e, (long)g)
|
|
/* Ditto, writes to stderr. */
|
|
|
|
void GC_err_puts GC_PROTO((GC_CONST char *s));
|
|
/* Write s to stderr, don't buffer, don't add */
|
|
/* newlines, don't ... */
|
|
|
|
#if defined(LINUX) && !defined(SMALL_CONFIG)
|
|
void GC_err_write GC_PROTO((GC_CONST char *buf, size_t len));
|
|
/* Write buf to stderr, don't buffer, don't add */
|
|
/* newlines, don't ... */
|
|
#endif
|
|
|
|
|
|
# ifdef GC_ASSERTIONS
|
|
# define GC_ASSERT(expr) if(!(expr)) {\
|
|
GC_err_printf2("Assertion failure: %s:%ld\n", \
|
|
__FILE__, (unsigned long)__LINE__); \
|
|
ABORT("assertion failure"); }
|
|
# else
|
|
# define GC_ASSERT(expr)
|
|
# endif
|
|
|
|
# if defined(PARALLEL_MARK) || defined(THREAD_LOCAL_ALLOC)
|
|
/* We need additional synchronization facilities from the thread */
|
|
/* support. We believe these are less performance critical */
|
|
/* than the main garbage collector lock; standard pthreads-based */
|
|
/* implementations should be sufficient. */
|
|
|
|
/* The mark lock and condition variable. If the GC lock is also */
|
|
/* acquired, the GC lock must be acquired first. The mark lock is */
|
|
/* used to both protect some variables used by the parallel */
|
|
/* marker, and to protect GC_fl_builder_count, below. */
|
|
/* GC_notify_all_marker() is called when */
|
|
/* the state of the parallel marker changes */
|
|
/* in some significant way (see gc_mark.h for details). The */
|
|
/* latter set of events includes incrementing GC_mark_no. */
|
|
/* GC_notify_all_builder() is called when GC_fl_builder_count */
|
|
/* reaches 0. */
|
|
|
|
extern void GC_acquire_mark_lock();
|
|
extern void GC_release_mark_lock();
|
|
extern void GC_notify_all_builder();
|
|
/* extern void GC_wait_builder(); */
|
|
extern void GC_wait_for_reclaim();
|
|
|
|
extern word GC_fl_builder_count; /* Protected by mark lock. */
|
|
# endif /* PARALLEL_MARK || THREAD_LOCAL_ALLOC */
|
|
# ifdef PARALLEL_MARK
|
|
extern void GC_notify_all_marker();
|
|
extern void GC_wait_marker();
|
|
extern word GC_mark_no; /* Protected by mark lock. */
|
|
|
|
extern void GC_help_marker(word my_mark_no);
|
|
/* Try to help out parallel marker for mark cycle */
|
|
/* my_mark_no. Returns if the mark cycle finishes or */
|
|
/* was already done, or there was nothing to do for */
|
|
/* some other reason. */
|
|
# endif /* PARALLEL_MARK */
|
|
|
|
# if defined(GC_PTHREADS) && !defined(GC_SOLARIS_THREADS)
|
|
/* We define the thread suspension signal here, so that we can refer */
|
|
/* to it in the dirty bit implementation, if necessary. Ideally we */
|
|
/* would allocate a (real-time ?) signal using the standard mechanism.*/
|
|
/* unfortunately, there is no standard mechanism. (There is one */
|
|
/* in Linux glibc, but it's not exported.) Thus we continue to use */
|
|
/* the same hard-coded signals we've always used. */
|
|
# if !defined(SIG_SUSPEND)
|
|
# if defined(GC_LINUX_THREADS)
|
|
# if defined(SPARC) && !defined(SIGPWR)
|
|
/* SPARC/Linux doesn't properly define SIGPWR in <signal.h>.
|
|
* It is aliased to SIGLOST in asm/signal.h, though. */
|
|
# define SIG_SUSPEND SIGLOST
|
|
# else
|
|
/* Linuxthreads itself uses SIGUSR1 and SIGUSR2. */
|
|
# define SIG_SUSPEND SIGPWR
|
|
# endif
|
|
# else /* !GC_LINUX_THREADS */
|
|
# if defined(_SIGRTMIN)
|
|
# define SIG_SUSPEND _SIGRTMIN + 6
|
|
# else
|
|
# define SIG_SUSPEND SIGRTMIN + 6
|
|
# endif
|
|
# endif
|
|
# endif /* !SIG_SUSPEND */
|
|
|
|
# endif
|
|
|
|
# endif /* GC_PRIVATE_H */
|