+++ /dev/null
-/*
- * 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 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 structure 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 "private/gc_pmark.h"
-#include "gc_gcj.h"
-#include "private/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;
-
-/* Caller does not hold allocation lock. */
-void GC_init_gcj_malloc(int mp_index, void * /* really GC_mark_proc */mp)
-{
- register int i;
- GC_bool ignore_gcj_info;
- 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;
- ignore_gcj_info = (0 != GETENV("GC_IGNORE_GCJ_INFO"));
-# ifdef CONDPRINT
- if (GC_print_stats && ignore_gcj_info) {
- GC_printf0("Gcj-style type information is disabled!\n");
- }
-# endif
- GC_mark_procs[mp_index] = (GC_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_INTERNAL_MALLOC((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;
- if (ignore_gcj_info) {
- /* Use a simple length-based descriptor, thus forcing a fully */
- /* conservative scan. */
- GC_obj_kinds[GC_gcj_kind].ok_descriptor = (0 | GC_DS_LENGTH);
- GC_obj_kinds[GC_gcj_kind].ok_relocate_descr = TRUE;
- } else {
- GC_obj_kinds[GC_gcj_kind].ok_descriptor =
- (((word)(-MARK_DESCR_OFFSET - GC_INDIR_PER_OBJ_BIAS))
- | GC_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_INTERNAL_MALLOC((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;
- if (ignore_gcj_info) {
- GC_obj_kinds[GC_gcj_kind].ok_descriptor = (0 | GC_DS_LENGTH);
- GC_obj_kinds[GC_gcj_kind].ok_relocate_descr = TRUE;
- } else {
- GC_obj_kinds[GC_gcj_debug_kind].ok_descriptor =
- GC_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( EXPECT(SMALL_OBJ(lb), 1) ) {
-# ifdef MERGE_SIZES
- lw = GC_size_map[lb];
-# else
- lw = ALIGNED_WORDS(lb);
-# endif
- opp = &(GC_gcjobjfreelist[lw]);
- LOCK();
- op = *opp;
- if( EXPECT(op == 0, 0)) {
- op = (ptr_t)GENERAL_MALLOC((word)lb, GC_gcj_kind);
- if (0 == op) {
- UNLOCK();
- return(GC_oom_fn(lb));
- }
-# ifdef MERGE_SIZES
- lw = GC_size_map[lb]; /* May have been uninitialized. */
-# endif
- } else {
- *opp = obj_link(op);
- GC_words_allocd += lw;
- }
- *(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_fn(lb));
- }
- *(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_fn(lb));
- }
- *((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();
- op = *opp;
- if( EXPECT(op == 0, 0) ) {
- op = (ptr_t)GC_clear_stack(
- GC_generic_malloc_words_small_inner(lw, GC_gcj_kind));
- if (0 == op) {
- UNLOCK();
- return GC_oom_fn(WORDS_TO_BYTES(lw));
- }
- } 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_fn(WORDS_TO_BYTES(lw));
- }
- *((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;
- }
- *(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 */
projects / msp430-gcc.git / blobdiff