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/*
* Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
* Copyright (c) 1999 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.
*
*/
/* Boehm, July 31, 1995 5:02 pm PDT */
#ifdef GC_GCJ_SUPPORT
/*
* This is an allocator interface tuned for gcj (the GNU/Cygnus static
* java compiler).
*
* Each allocated object has a pointer in its first word to a vtable,
* which for our purposes is simply a structure describing the type of
* the object.
* This descriptor structur contains a GC marking descriptor at offset
* MARK_DESCR_OFFSET.
*
* It is hoped that this interface may also be useful for other systems,
* possibly with some tuning of the constants. But the immediate goal
* is to get better gcj performance.
*
* We assume:
* 1) We have an ANSI conforming C compiler.
* 2) Counting on explicit initialization of this interface is OK.
* 3) FASTLOCK is not a significant win.
*/
#include "gc_priv.h"
#include "gc_mark.h"
#include "include/gc_gcj.h"
#include "dbg_mlc.h"
GC_bool GC_gcj_malloc_initialized = FALSE;
int GC_gcj_kind; /* Object kind for objects with descriptors */
/* in "vtable". */
int GC_gcj_debug_kind; /* The kind of objects that is always marked */
/* with a mark proc call. */
ptr_t * GC_gcjobjfreelist;
ptr_t * GC_gcjdebugobjfreelist;
void * GC_default_oom_action(void) { return 0; }
void * (*GC_oom_action)(void) = GC_default_oom_action;
/* Caller does not hold allocation lock. */
void GC_init_gcj_malloc(int mp_index, void * /* really mark_proc */mp)
{
register int i;
DCL_LOCK_STATE;
GC_init(); /* In case it's not already done. */
DISABLE_SIGNALS();
LOCK();
if (GC_gcj_malloc_initialized) {
UNLOCK();
ENABLE_SIGNALS();
return;
}
GC_gcj_malloc_initialized = TRUE;
GC_mark_procs[mp_index] = (mark_proc)mp;
if (mp_index >= GC_n_mark_procs) ABORT("GC_init_gcj_malloc: bad index");
/* Set up object kind gcj-style indirect descriptor. */
GC_gcjobjfreelist = (ptr_t *)
GC_generic_malloc_inner((MAXOBJSZ+1)*sizeof(ptr_t), PTRFREE);
if (GC_gcjobjfreelist == 0) ABORT("Couldn't allocate GC_gcjobjfreelist");
BZERO(GC_gcjobjfreelist, (MAXOBJSZ+1)*sizeof(ptr_t));
GC_gcj_kind = GC_n_kinds++;
GC_obj_kinds[GC_gcj_kind].ok_freelist = GC_gcjobjfreelist;
GC_obj_kinds[GC_gcj_kind].ok_reclaim_list = 0;
GC_obj_kinds[GC_gcj_kind].ok_descriptor =
(((word)(-MARK_DESCR_OFFSET - INDIR_PER_OBJ_BIAS)) | DS_PER_OBJECT);
GC_obj_kinds[GC_gcj_kind].ok_relocate_descr = FALSE;
GC_obj_kinds[GC_gcj_kind].ok_init = TRUE;
/* Set up object kind for objects that require mark proc call. */
GC_gcjdebugobjfreelist = (ptr_t *)
GC_generic_malloc_inner((MAXOBJSZ+1)*sizeof(ptr_t), PTRFREE);
if (GC_gcjdebugobjfreelist == 0)
ABORT("Couldn't allocate GC_gcjdebugobjfreelist");
BZERO(GC_gcjdebugobjfreelist, (MAXOBJSZ+1)*sizeof(ptr_t));
GC_gcj_debug_kind = GC_n_kinds++;
GC_obj_kinds[GC_gcj_debug_kind].ok_freelist = GC_gcjdebugobjfreelist;
GC_obj_kinds[GC_gcj_debug_kind].ok_reclaim_list = 0;
GC_obj_kinds[GC_gcj_debug_kind].ok_descriptor =
MAKE_PROC(mp_index, 1 /* allocated with debug info */);
GC_obj_kinds[GC_gcj_debug_kind].ok_relocate_descr = FALSE;
GC_obj_kinds[GC_gcj_debug_kind].ok_init = TRUE;
UNLOCK();
ENABLE_SIGNALS();
}
ptr_t GC_clear_stack();
#define GENERAL_MALLOC(lb,k) \
(GC_PTR)GC_clear_stack(GC_generic_malloc_inner((word)lb, k))
#define GENERAL_MALLOC_IOP(lb,k) \
(GC_PTR)GC_clear_stack(GC_generic_malloc_inner_ignore_off_page(lb, k))
/* Allocate an object, clear it, and store the pointer to the */
/* type structure (vtable in gcj). */
/* This adds a byte at the end of the object if GC_malloc would.*/
void * GC_gcj_malloc(size_t lb, void * ptr_to_struct_containing_descr)
{
register ptr_t op;
register ptr_t * opp;
register word lw;
DCL_LOCK_STATE;
if( SMALL_OBJ(lb) ) {
# ifdef MERGE_SIZES
lw = GC_size_map[lb];
# else
lw = ALIGNED_WORDS(lb);
# endif
opp = &(GC_gcjobjfreelist[lw]);
LOCK();
if( (op = *opp) == 0 ) {
op = (ptr_t)GENERAL_MALLOC((word)lb, GC_gcj_kind);
if (0 == op) {
UNLOCK();
return(GC_oom_action());
}
# ifdef MERGE_SIZES
lw = GC_size_map[lb]; /* May have been uninitialized. */
# endif
} else {
*opp = obj_link(op);
GC_words_allocd += lw;
FASTUNLOCK();
}
*(void **)op = ptr_to_struct_containing_descr;
UNLOCK();
} else {
LOCK();
op = (ptr_t)GENERAL_MALLOC((word)lb, GC_gcj_kind);
if (0 == op) {
UNLOCK();
return(GC_oom_action());
}
*(void **)op = ptr_to_struct_containing_descr;
UNLOCK();
}
return((GC_PTR) op);
}
/* Similar to GC_gcj_malloc, but add debug info. This is allocated */
/* with GC_gcj_debug_kind. */
GC_PTR GC_debug_gcj_malloc(size_t lb, void * ptr_to_struct_containing_descr,
GC_EXTRA_PARAMS)
{
GC_PTR result;
/* We clone the code from GC_debug_gcj_malloc, so that we */
/* dont end up with extra frames on the stack, which could */
/* confuse the backtrace. */
LOCK();
result = GC_generic_malloc_inner(lb + DEBUG_BYTES, GC_gcj_debug_kind);
if (result == 0) {
UNLOCK();
GC_err_printf2("GC_debug_gcj_malloc(%ld, 0x%lx) returning NIL (",
(unsigned long) lb,
(unsigned long) ptr_to_struct_containing_descr);
GC_err_puts(s);
GC_err_printf1(":%ld)\n", (unsigned long)i);
return(GC_oom_action());
}
*((void **)((ptr_t)result + sizeof(oh))) = ptr_to_struct_containing_descr;
UNLOCK();
if (!GC_debugging_started) {
GC_start_debugging();
}
ADD_CALL_CHAIN(result, ra);
return (GC_store_debug_info(result, (word)lb, s, (word)i));
}
/* Similar to GC_gcj_malloc, but the size is in words, and we don't */
/* adjust it. The size is assumed to be such that it can be */
/* allocated as a small object. */
void * GC_gcj_fast_malloc(size_t lw, void * ptr_to_struct_containing_descr)
{
ptr_t op;
ptr_t * opp;
DCL_LOCK_STATE;
opp = &(GC_gcjobjfreelist[lw]);
LOCK();
if( (op = *opp) == 0 ) {
op = (ptr_t)GC_clear_stack(
GC_generic_malloc_words_small_inner(lw, GC_gcj_kind));
if (0 == op) {
UNLOCK();
return(GC_oom_action());
}
} else {
*opp = obj_link(op);
GC_words_allocd += lw;
}
*(void **)op = ptr_to_struct_containing_descr;
UNLOCK();
return((GC_PTR) op);
}
/* And a debugging version of the above: */
void * GC_debug_gcj_fast_malloc(size_t lw,
void * ptr_to_struct_containing_descr,
GC_EXTRA_PARAMS)
{
GC_PTR result;
size_t lb = WORDS_TO_BYTES(lw);
/* We clone the code from GC_debug_gcj_malloc, so that we */
/* dont end up with extra frames on the stack, which could */
/* confuse the backtrace. */
LOCK();
result = GC_generic_malloc_inner(lb + DEBUG_BYTES, GC_gcj_debug_kind);
if (result == 0) {
UNLOCK();
GC_err_printf2("GC_debug_gcj_fast_malloc(%ld, 0x%lx) returning NIL (",
(unsigned long) lw,
(unsigned long) ptr_to_struct_containing_descr);
GC_err_puts(s);
GC_err_printf1(":%ld)\n", (unsigned long)i);
return(GC_oom_action());
}
*((void **)((ptr_t)result + sizeof(oh))) = ptr_to_struct_containing_descr;
UNLOCK();
if (!GC_debugging_started) {
GC_start_debugging();
}
ADD_CALL_CHAIN(result, ra);
return (GC_store_debug_info(result, (word)lb, s, (word)i));
}
void * GC_gcj_malloc_ignore_off_page(size_t lb,
void * ptr_to_struct_containing_descr)
{
register ptr_t op;
register ptr_t * opp;
register word lw;
DCL_LOCK_STATE;
if( SMALL_OBJ(lb) ) {
# ifdef MERGE_SIZES
lw = GC_size_map[lb];
# else
lw = ALIGNED_WORDS(lb);
# endif
opp = &(GC_gcjobjfreelist[lw]);
LOCK();
if( (op = *opp) == 0 ) {
op = (ptr_t)GENERAL_MALLOC_IOP(lb, GC_gcj_kind);
# ifdef MERGE_SIZES
lw = GC_size_map[lb]; /* May have been uninitialized. */
# endif
} else {
*opp = obj_link(op);
GC_words_allocd += lw;
FASTUNLOCK();
}
*(void **)op = ptr_to_struct_containing_descr;
UNLOCK();
} else {
op = (ptr_t)GENERAL_MALLOC_IOP(lb, GC_gcj_kind);
if (0 != op) {
*(void **)op = ptr_to_struct_containing_descr;
}
UNLOCK();
}
return((GC_PTR) op);
}
#else
char GC_no_gcj_support;
#endif /* GC_GCJ_SUPPORT */
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