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Diff for /OpenXM_contrib/gc/include/private/Attic/gc_priv.h between version 1.1 and 1.1.1.3

version 1.1, 1999/11/27 10:58:34

version 1.1.1.3, 2000/12/01 14:48:31

Line 1

* THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED

* OR IMPLIED. ANY USE IS AT YOUR OWN RISK.

Line 41

Line 44

typedef GC_word word;

typedef GC_signed_word signed_word;

# ifndef CONFIG_H

# ifndef GCCONFIG_H

# include "gcconfig.h"

# endif

Line 64 typedef char * ptr_t; /* A generic pointer to which we

Line 67 typedef char * ptr_t; /* A generic pointer to which we

# include <stddef.h>

# endif

# define VOLATILE volatile

# define CONST const

#else

# ifdef MSWIN32

# include <stdlib.h>

# endif

# define VOLATILE

# define CONST

#endif

#ifdef AMIGA

#define CONST GC_CONST

#if 0 /* was once defined for AMIGA */

# define GC_FAR __far

#else

# define GC_FAR

#endif

/*********************************/

/* */

/* Definitions for conservative */

Line 170 typedef char * ptr_t; /* A generic pointer to which we

Line 174 typedef char * ptr_t; /* A generic pointer to which we

/* May save significant amounts of space for obj_map */

/* entries. */

#ifndef OLD_BLOCK_ALLOC

/* Macros controlling large block allocation strategy. */

# define EXACT_FIRST /* Make a complete pass through the large object */

/* free list before splitting a block */

# define PRESERVE_LAST /* Do not divide last allocated heap segment */

/* unless we would otherwise need to expand the */

/* heap. */

#endif

/* ALIGN_DOUBLE requires MERGE_SIZES at present. */

# if defined(ALIGN_DOUBLE) && !defined(MERGE_SIZES)

# define MERGE_SIZES

Line 278 void GC_print_callers (/* struct callinfo info[NFRAMES

Line 273 void GC_print_callers (/* struct callinfo info[NFRAMES

# 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 */

# ifdef MSWIN32

# 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, !BSD_TIME */

# include <time.h>

# if !defined(__STDC__) && defined(SPARC) && defined(SUNOS4)

clock_t clock(); /* Not in time.h, where it belongs */

Line 303 void GC_print_callers (/* struct callinfo info[NFRAMES

Line 305 void GC_print_callers (/* struct callinfo info[NFRAMES

# 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. */

Line 350 void GC_print_callers (/* struct callinfo info[NFRAMES

Line 353 void GC_print_callers (/* struct callinfo info[NFRAMES

+ GC_page_size) \

+ GC_page_size-1)

# else

# if defined(AMIGA) || defined(NEXT) || defined(DOS4GW)

# if defined(AMIGA) || defined(NEXT) || defined(MACOSX) || defined(DOS4GW)

# define GET_MEM(bytes) HBLKPTR((size_t) \

calloc(1, (size_t)bytes + GC_page_size) \

+ GC_page_size-1)

Line 434 void GC_print_callers (/* struct callinfo info[NFRAMES

Line 437 void GC_print_callers (/* struct callinfo info[NFRAMES

# define LOCK() mutex_lock(&GC_allocate_ml);

# define UNLOCK() mutex_unlock(&GC_allocate_ml);

# endif

# ifdef LINUX_THREADS

# if defined(LINUX_THREADS)

# if defined(I386)|| defined(POWERPC) || defined(ALPHA) || defined(IA64) \

|| defined(M68K)

# include <pthread.h>

# ifdef __i386__

# define USE_SPIN_LOCK

# if defined(I386)

inline static int GC_test_and_set(volatile unsigned int *addr) {

int oldval;

/* Note: the "xchg" instruction does not need a "lock" prefix */

Line 445 void GC_print_callers (/* struct callinfo info[NFRAMES

Line 451 void GC_print_callers (/* struct callinfo info[NFRAMES

: "0"(1), "m"(*(addr)));

return oldval;

}

# else

-- > Need implementation of GC_test_and_set()

# endif

# define GC_clear(addr) (*(addr) = 0)

# if defined(IA64)

inline static int GC_test_and_set(volatile unsigned int *addr) {

int oldval;

__asm__ __volatile__("xchg4 %0=%1,%2"

: "=r"(oldval), "=m"(*addr)

: "r"(1), "1"(*addr));

return oldval;

}

inline static void GC_clear(volatile unsigned int *addr) {

__asm__ __volatile__("st4.rel %0=r0" : "=m" (*addr));

}

# define GC_CLEAR_DEFINED

# endif

# ifdef M68K

/* Contributed by Tony Mantler. I'm not sure how well it was */

/* tested. */

inline static int GC_test_and_set(volatile unsigned int *addr) {

char oldval; /* this must be no longer than 8 bits */

/* The return value is semi-phony. */

/* 'tas' sets bit 7 while the return */

/* value pretends bit 0 was set */

__asm__ __volatile__(

"tas %1@; sne %0; negb %0"

: "=d" (oldval)

: "a" (addr));

return oldval;

}

# endif

# if defined(POWERPC)

inline static int GC_test_and_set(volatile unsigned int *addr) {

int oldval;

int temp = 1; // locked value

__asm__ __volatile__(

"1:\tlwarx %0,0,%3\n" // load and reserve

"\tcmpwi %0, 0\n" // if load is

"\tbne 2f\n" // non-zero, return already set

"\tstwcx. %2,0,%1\n" // else store conditional

"\tbne- 1b\n" // retry if lost reservation

"2:\t\n" // oldval is zero if we set

: "=&r"(oldval), "=p"(addr)

: "r"(temp), "1"(addr)

: "memory");

return (int)oldval;

}

inline static void GC_clear(volatile unsigned int *addr) {

__asm__ __volatile__("eieio");

*(addr) = 0;

}

# define GC_CLEAR_DEFINED

# endif

# ifdef ALPHA

inline static int GC_test_and_set(volatile unsigned int * addr)

{

unsigned long oldvalue;

unsigned long temp;

__asm__ __volatile__(

"1: ldl_l %0,%1\n"

" and %0,%3,%2\n"

" bne %2,2f\n"

" xor %0,%3,%0\n"

" stl_c %0,%1\n"

" beq %0,3f\n"

" mb\n"

"2:\n"

".section .text2,\"ax\"\n"

"3: br 1b\n"

".previous"

:"=&r" (temp), "=m" (*addr), "=&r" (oldvalue)

:"Ir" (1), "m" (*addr));

return oldvalue;

}

/* Should probably also define GC_clear, since it needs */

/* a memory barrier ?? */

# endif /* ALPHA */

# ifdef ARM32

inline static int GC_test_and_set(volatile unsigned int *addr) {

int oldval;

/* SWP on ARM is very similar to XCHG on x86. Doesn't lock the

* bus because there are no SMP ARM machines. If/when there are,

* this code will likely need to be updated. */

/* See linuxthreads/sysdeps/arm/pt-machine.h in glibc-2.1 */

__asm__ __volatile__("swp %0, %1, [%2]"

: "=r"(oldval)

: "r"(1), "r"(addr));

return oldval;

}

# endif

# ifndef GC_CLEAR_DEFINED

inline static void GC_clear(volatile unsigned int *addr) {

/* Try to discourage gcc from moving anything past this. */

__asm__ __volatile__(" ");

*(addr) = 0;

}

# endif

extern volatile unsigned int GC_allocate_lock;

/* This is not a mutex because mutexes that obey the (optional) */

/* POSIX scheduling rules are subject to convoys in high contention */

/* applications. This is basically a spin lock. */

extern pthread_t GC_lock_holder;

extern void GC_lock(void);

/* Allocation lock holder. Only set if acquired by client through */

Line 462 void GC_print_callers (/* struct callinfo info[NFRAMES

Line 560 void GC_print_callers (/* struct callinfo info[NFRAMES

# define NO_THREAD (pthread_t)(-1)

# define UNSET_LOCK_HOLDER() GC_lock_holder = NO_THREAD

# define I_HOLD_LOCK() (pthread_equal(GC_lock_holder, pthread_self()))

# ifdef UNDEFINED

# define LOCK() \

# define LOCK() pthread_mutex_lock(&GC_allocate_ml)

# define UNLOCK() pthread_mutex_unlock(&GC_allocate_ml)

# else

# define LOCK() \

{ if (GC_test_and_set(&GC_allocate_lock)) GC_lock(); }

# define UNLOCK() \

GC_clear(&GC_allocate_lock)

# endif

extern VOLATILE GC_bool GC_collecting;

extern GC_bool GC_collecting;

# define ENTER_GC() \

{ \

GC_collecting = 1; \

}

# define EXIT_GC() GC_collecting = 0;

# else /* LINUX_THREADS on hardware for which we don't know how */

/* to do test and set. */

# include <pthread.h>

extern pthread_mutex_t GC_allocate_ml;

# define LOCK() pthread_mutex_lock(&GC_allocate_ml)

# define UNLOCK() pthread_mutex_unlock(&GC_allocate_ml)

# endif

# endif /* LINUX_THREADS */

# if defined(IRIX_THREADS) || defined(IRIX_JDK_THREADS)

# if defined(HPUX_THREADS)

# include <pthread.h>

# include <mutex.h>

extern pthread_mutex_t GC_allocate_ml;

# define LOCK() pthread_mutex_lock(&GC_allocate_ml)

# define UNLOCK() pthread_mutex_unlock(&GC_allocate_ml)

# endif

# if defined(IRIX_THREADS) || defined(IRIX_JDK_THREADS)

/* This may also eventually be appropriate for HPUX_THREADS */

# include <pthread.h>

# ifndef HPUX_THREADS

/* This probably should never be included, but I can't test */

/* on Irix anymore. */

# include <mutex.h>

# endif

# if __mips < 3 || !(defined (_ABIN32) || defined(_ABI64)) \

# ifndef HPUX_THREADS

# if __mips < 3 || !(defined (_ABIN32) || defined(_ABI64)) \

|| !defined(_COMPILER_VERSION) || _COMPILER_VERSION < 700

# define GC_test_and_set(addr, v) test_and_set(addr,v)

# else

# define GC_test_and_set(addr, v) __test_and_set(addr,v)

# endif

# else

/* I couldn't find a way to do this inline on HP/UX */

# endif

extern unsigned long GC_allocate_lock;

/* This is not a mutex because mutexes that obey the (optional) */

Line 500 void GC_print_callers (/* struct callinfo info[NFRAMES

Line 615 void GC_print_callers (/* struct callinfo info[NFRAMES

# define NO_THREAD (pthread_t)(-1)

# define UNSET_LOCK_HOLDER() GC_lock_holder = NO_THREAD

# define I_HOLD_LOCK() (pthread_equal(GC_lock_holder, pthread_self()))

# ifdef UNDEFINED

# ifdef HPUX_THREADS

# define LOCK() pthread_mutex_lock(&GC_allocate_ml)

# define LOCK() { if (!GC_test_and_clear(&GC_allocate_lock)) GC_lock(); }

# define UNLOCK() pthread_mutex_unlock(&GC_allocate_ml)

/* The following is INCORRECT, since the memory model is too weak. */

# define UNLOCK() { GC_noop1(&GC_allocate_lock); \

*(volatile unsigned long *)(&GC_allocate_lock) = 1; }

# else

# define LOCK() { if (GC_test_and_set(&GC_allocate_lock, 1)) GC_lock(); }

# if __mips >= 3 && (defined (_ABIN32) || defined(_ABI64)) \

&& defined(_COMPILER_VERSION) && _COMPILER_VERSION >= 700

# define UNLOCK() __lock_release(&GC_allocate_lock)

# else

/* The function call in the following should prevent the */

/* compiler from moving assignments to below the UNLOCK. */

/* This is probably not necessary for ucode or gcc 2.8. */

Line 516 void GC_print_callers (/* struct callinfo info[NFRAMES

Line 633 void GC_print_callers (/* struct callinfo info[NFRAMES

/* versions. */

# define UNLOCK() { GC_noop1(&GC_allocate_lock); \

*(volatile unsigned long *)(&GC_allocate_lock) = 0; }

# endif

extern GC_bool GC_collecting;

extern VOLATILE GC_bool GC_collecting;

# define ENTER_GC() \

{ \

GC_collecting = 1; \

Line 607 void GC_print_callers (/* struct callinfo info[NFRAMES

Line 724 void GC_print_callers (/* struct callinfo info[NFRAMES

# else

# if defined(SOLARIS_THREADS) || defined(WIN32_THREADS) \

|| defined(IRIX_THREADS) || defined(LINUX_THREADS) \

|| defined(IRIX_JDK_THREADS)

|| defined(IRIX_JDK_THREADS) || defined(HPUX_THREADS)

void GC_stop_world();

void GC_start_world();

# define STOP_WORLD() GC_stop_world()

Line 823 struct hblkhdr {

Line 940 struct hblkhdr {

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. */

char* hb_map; /* A pointer to a pointer validity map of the block. */

Line 837 struct hblkhdr {

Line 955 struct hblkhdr {

# 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 */

/* unly for USE_MUNMAP, and indicates */

/* when the header was allocated, or */

/* when the size of the block last */

/* changed. */

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. */

};

/* heap block body */

Line 879 struct hblk {

Line 1011 struct hblk {

/* The type of mark procedures. This really belongs in gc_mark.h. */

/* But we put it here, so that we can avoid scanning the mark proc */

/* table. */

typedef struct ms_entry * (*mark_proc)(/* word * addr, mark_stack_ptr,

typedef struct ms_entry * (*mark_proc)(/* word * addr,

mark_stack_limit, env */);

struct ms_entry *mark_stack_ptr,

struct ms_entry *mark_stack_limit,

word env */);

# define LOG_MAX_MARK_PROCS 6

# define MAX_MARK_PROCS (1 << LOG_MAX_MARK_PROCS)

Line 957 struct roots {

Line 1091 struct roots {

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 _words_allocd_before_gc;

/* Number of words allocated before this */

/* collection cycle. */

Line 978 struct _GC_arrays {

Line 1116 struct _GC_arrays {

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. */

mark_proc _mark_procs[MAX_MARK_PROCS];

/* Table of user-defined mark procedures. There is */

/* a small number of these, which can be referenced */

Line 1005 struct _GC_arrays {

Line 1147 struct _GC_arrays {

/* 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 */

Line 1022 struct _GC_arrays {

Line 1167 struct _GC_arrays {

/* to an object at */

/* block_start+i&~3 - WORDS_TO_BYTES(j). */

/* (If ALL_INTERIOR_POINTERS is defined, then */

/* instead ((short *)(hbh_map[sz])[i] is j if */

/* instead ((short *)(hb_map[sz])[i] is j if */

/* block_start+WORDS_TO_BYTES(i) is in the */

/* interior of an object starting at */

/* block_start+WORDS_TO_BYTES(i-j)). */

Line 1135 GC_API GC_FAR struct _GC_arrays GC_arrays;

Line 1280 GC_API GC_FAR struct _GC_arrays GC_arrays;

# define GC_prev_heap_addr GC_arrays._prev_heap_addr

# define GC_words_allocd GC_arrays._words_allocd

# define GC_words_wasted GC_arrays._words_wasted

# define GC_large_free_bytes GC_arrays._large_free_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

# ifdef MSWIN32

# define GC_heap_bases GC_arrays._heap_bases

# endif

Line 1172 GC_API GC_FAR struct _GC_arrays GC_arrays;

Line 1324 GC_API GC_FAR struct _GC_arrays GC_arrays;

# 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

Line 1236 extern char * GC_invalid_map;

Line 1390 extern char * GC_invalid_map;

/* Pointer to the nowhere valid hblk map */

/* Blocks pointing to this map are free. */

extern struct hblk * GC_hblkfreelist;

extern struct hblk * GC_hblkfreelist[];

/* List of completely empty heap blocks */

/* Linked through hb_next field of */

/* header structure associated with */

Line 1251 extern GC_bool GC_objects_are_marked; /* There are mar

Line 1405 extern GC_bool GC_objects_are_marked; /* There are mar

extern GC_bool GC_incremental;

/* Using incremental/generational collection. */

#else

# define GC_incremental TRUE

# define GC_incremental FALSE

/* Hopefully allow optimizer to remove some code. */

#endif

Line 1304 extern ptr_t GC_greatest_plausible_heap_addr;

Line 1458 extern ptr_t GC_greatest_plausible_heap_addr;

ptr_t GC_approx_sp();

GC_bool GC_should_collect();

#ifdef PRESERVE_LAST

GC_bool GC_in_last_heap_sect(/* ptr_t */);

/* In last added heap section? If so, avoid breaking up. */

#endif

void GC_apply_to_all_blocks(/*fn, client_data*/);

/* Invoke fn(hbp, client_data) for each */

/* allocated heap block. */

struct hblk * GC_next_block(/* struct hblk * h */);

struct hblk * GC_next_used_block(/* struct hblk * h */);

/* Return first in-use block >= h */

struct hblk * GC_prev_block(/* 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();

void GC_clear_marks(); /* Clear mark bits for all heap objects. */

void GC_invalidate_mark_state(); /* Tell the marker that marked */

Line 1384 extern void (*GC_start_call_back)(/* void */);

Line 1540 extern void (*GC_start_call_back)(/* void */);

/* lock held. */

/* 0 by default. */

void GC_push_regs(); /* Push register contents onto mark stack. */

/* If NURSERY is defined, the default push */

/* action can be overridden with GC_push_proc */

void GC_remark(); /* Mark from all marked objects. Used */

/* only if we had to drop something. */

# ifdef NURSERY

extern void (*GC_push_proc)(ptr_t);

# endif

# if defined(MSWIN32)

void __cdecl GC_push_one();

# else

Line 1573 ptr_t GC_allocobj(/* sz_inn_words, kind */);

Line 1735 ptr_t GC_allocobj(/* sz_inn_words, kind */);

/* head. */

void GC_init_headers();

GC_bool GC_install_header(/*h*/);

struct hblkhdr * GC_install_header(/*h*/);

/* Install a header for block h. */

/* Return FALSE on failure. */

/* Return 0 on failure, or the header */

/* otherwise. */

GC_bool GC_install_counts(/*h, sz*/);

/* Set up forwarding counts for block */

/* h of size sz. */

Line 1608 extern void (*GC_print_heap_obj)(/* ptr_t p */);

Line 1771 extern void (*GC_print_heap_obj)(/* ptr_t p */);

/* detailed description of the object */

/* referred to by p. */

/* 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(); /* Retrieve dirty bits. */

Line 1640 void GC_print_heap_sects();

Line 1812 void GC_print_heap_sects();

void GC_print_static_roots();

void GC_dump();

#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*, ...);

Line 1689 void GC_err_puts(/* char *s */);

Line 1871 void GC_err_puts(/* char *s */);

/* Write s to stderr, don't buffer, don't add */

/* newlines, don't ... */

# 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

# endif /* GC_PRIVATE_H */

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