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Diffstat (limited to '')
| -rw-r--r-- | gc/include/private/gc_priv.h | 1884 |
1 files changed, 0 insertions, 1884 deletions
diff --git a/gc/include/private/gc_priv.h b/gc/include/private/gc_priv.h deleted file mode 100644 index 2cf07d1..0000000 --- a/gc/include/private/gc_priv.h +++ /dev/null @@ -1,1884 +0,0 @@ -/* - * 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 DGUX -# include <sys/types.h> -# include <sys/time.h> -# include <sys/resource.h> -#endif /* DGUX */ - -#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 - -/* 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 GC_PROTO((GC_CONST char * msg)); -# 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. */ - word _finalizer_mem_freed; - /* Words of memory explicitly deallocated while */ - /* finalizers were running. Used to approximate mem. */ - /* explicitly deallocated by finalizers. */ - 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_finalizer_mem_freed GC_arrays._finalizer_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_objects_are_marked; /* There are marked objects in */ - /* the heap. */ - -#ifndef SMALL_CONFIG - extern GC_bool GC_incremental; - /* Using incremental/generational collection. */ -# define TRUE_INCREMENTAL \ - (GC_incremental && GC_time_limit != GC_TIME_UNLIMITED) - /* True incremental, not just generational, mode */ -#else -# define GC_incremental FALSE - /* Hopefully allow optimizer to remove some code. */ -# define TRUE_INCREMENTAL FALSE -#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. */ - -/* 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. */ - -extern GC_bool GC_is_initialized; /* GC_init() has been run. */ - -#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. */ - /* Add any that are not to GC_smashed list. */ -extern void (*GC_print_all_smashed) GC_PROTO((void)); - /* Print GC_smashed if it's not empty. */ - /* Clear GC_smashed list. */ -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) || defined(GC_DGUX386_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 */ |