-/*
+/*
* Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
* Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
*
* provided the above notices are retained, and a notice that the code was
* modified is included with the above copyright notice.
*/
-/* Boehm, August 9, 1995 6:09 pm PDT */
-# include "private/gc_priv.h"
+
+#include "private/gc_priv.h"
/*
* We maintain several hash tables of hblks that have had false hits.
* from elsewhere, since the former can pin a large object that spans the
* block, eventhough it does not start on the dangerous block.
*/
-
+
/*
* Externally callable routines are:
-
+
* GC_add_to_black_list_normal
* GC_add_to_black_list_stack
* GC_promote_black_lists
* All require that the allocator lock is held.
*/
-/* Pointers to individual tables. We replace one table by another by */
-/* switching these pointers. */
-STATIC word * GC_old_normal_bl;
- /* Nonstack false references seen at last full */
- /* collection. */
-STATIC word * GC_incomplete_normal_bl;
- /* Nonstack false references seen since last */
- /* full collection. */
-STATIC word * GC_old_stack_bl;
-STATIC word * GC_incomplete_stack_bl;
+/* Pointers to individual tables. We replace one table by another by */
+/* switching these pointers. */
+STATIC word * GC_old_normal_bl = NULL;
+ /* Nonstack false references seen at last full */
+ /* collection. */
+STATIC word * GC_incomplete_normal_bl = NULL;
+ /* Nonstack false references seen since last */
+ /* full collection. */
+STATIC word * GC_old_stack_bl = NULL;
+STATIC word * GC_incomplete_stack_bl = NULL;
-word GC_total_stack_black_listed;
+STATIC word GC_total_stack_black_listed = 0;
+ /* Number of bytes on stack blacklist. */
-word GC_black_list_spacing = MINHINCR*HBLKSIZE; /* Initial rough guess */
+GC_INNER word GC_black_list_spacing = MINHINCR * HBLKSIZE;
+ /* Initial rough guess. */
-void GC_clear_bl(word *);
+STATIC void GC_clear_bl(word *);
-void GC_default_print_heap_obj_proc(ptr_t p)
+GC_INNER void GC_default_print_heap_obj_proc(ptr_t p)
{
ptr_t base = GC_base(p);
-
GC_err_printf("start: %p, appr. length: %ld", base,
- (unsigned long)GC_size(base));
+ (unsigned long)GC_size(base));
}
-void (*GC_print_heap_obj) (ptr_t p) = GC_default_print_heap_obj_proc;
+GC_INNER void (*GC_print_heap_obj)(ptr_t p) = GC_default_print_heap_obj_proc;
#ifdef PRINT_BLACK_LIST
STATIC void GC_print_source_ptr(ptr_t p)
{
ptr_t base = GC_base(p);
if (0 == base) {
- if (0 == p) {
- GC_err_printf("in register");
- } else {
- GC_err_printf("in root set");
- }
+ if (0 == p) {
+ GC_err_printf("in register");
+ } else {
+ GC_err_printf("in root set");
+ }
} else {
- GC_err_printf("in object at ");
- /* FIXME: We can't call the debug version of GC_print_heap_obj */
- /* (with PRINT_CALL_CHAIN) here because the lock is held and */
- /* the world is stopped. */
- GC_default_print_heap_obj_proc(base);
+ GC_err_printf("in object at ");
+ /* FIXME: We can't call the debug version of GC_print_heap_obj */
+ /* (with PRINT_CALL_CHAIN) here because the lock is held and */
+ /* the world is stopped. */
+ GC_default_print_heap_obj_proc(base);
}
}
#endif
-void GC_bl_init(void)
+GC_INNER void GC_bl_init(void)
{
if (!GC_all_interior_pointers) {
GC_old_normal_bl = (word *)
- GC_scratch_alloc((word)(sizeof (page_hash_table)));
+ GC_scratch_alloc((word)(sizeof (page_hash_table)));
GC_incomplete_normal_bl = (word *)GC_scratch_alloc
- ((word)(sizeof(page_hash_table)));
+ ((word)(sizeof(page_hash_table)));
if (GC_old_normal_bl == 0 || GC_incomplete_normal_bl == 0) {
GC_err_printf("Insufficient memory for black list\n");
EXIT();
}
GC_old_stack_bl = (word *)GC_scratch_alloc((word)(sizeof(page_hash_table)));
GC_incomplete_stack_bl = (word *)GC_scratch_alloc
- ((word)(sizeof(page_hash_table)));
+ ((word)(sizeof(page_hash_table)));
if (GC_old_stack_bl == 0 || GC_incomplete_stack_bl == 0) {
GC_err_printf("Insufficient memory for black list\n");
EXIT();
GC_clear_bl(GC_old_stack_bl);
GC_clear_bl(GC_incomplete_stack_bl);
}
-
-void GC_clear_bl(word *doomed)
+
+STATIC void GC_clear_bl(word *doomed)
{
BZERO(doomed, sizeof(page_hash_table));
}
-void GC_copy_bl(word *old, word *new)
+STATIC void GC_copy_bl(word *old, word *new)
{
BCOPY(old, new, sizeof(page_hash_table));
}
static word total_stack_black_listed(void);
-/* Signal the completion of a collection. Turn the incomplete black */
-/* lists into new black lists, etc. */
-void GC_promote_black_lists(void)
+/* Signal the completion of a collection. Turn the incomplete black */
+/* lists into new black lists, etc. */
+GC_INNER void GC_promote_black_lists(void)
{
word * very_old_normal_bl = GC_old_normal_bl;
word * very_old_stack_bl = GC_old_stack_bl;
-
+
GC_old_normal_bl = GC_incomplete_normal_bl;
GC_old_stack_bl = GC_incomplete_stack_bl;
if (!GC_all_interior_pointers) {
GC_incomplete_stack_bl = very_old_stack_bl;
GC_total_stack_black_listed = total_stack_black_listed();
if (GC_print_stats == VERBOSE)
- GC_log_printf("%ld bytes in heap blacklisted for interior pointers\n",
- (unsigned long)GC_total_stack_black_listed);
+ GC_log_printf("%ld bytes in heap blacklisted for interior pointers\n",
+ (unsigned long)GC_total_stack_black_listed);
if (GC_total_stack_black_listed != 0) {
GC_black_list_spacing =
- HBLKSIZE*(GC_heapsize/GC_total_stack_black_listed);
+ HBLKSIZE*(GC_heapsize/GC_total_stack_black_listed);
}
if (GC_black_list_spacing < 3 * HBLKSIZE) {
- GC_black_list_spacing = 3 * HBLKSIZE;
+ GC_black_list_spacing = 3 * HBLKSIZE;
}
if (GC_black_list_spacing > MAXHINCR * HBLKSIZE) {
- GC_black_list_spacing = MAXHINCR * HBLKSIZE;
- /* Makes it easier to allocate really huge blocks, which otherwise */
- /* may have problems with nonuniform blacklist distributions. */
- /* This way we should always succeed immediately after growing the */
- /* heap. */
+ GC_black_list_spacing = MAXHINCR * HBLKSIZE;
+ /* Makes it easier to allocate really huge blocks, which otherwise */
+ /* may have problems with nonuniform blacklist distributions. */
+ /* This way we should always succeed immediately after growing the */
+ /* heap. */
}
}
-void GC_unpromote_black_lists(void)
+GC_INNER void GC_unpromote_black_lists(void)
{
if (!GC_all_interior_pointers) {
GC_copy_bl(GC_old_normal_bl, GC_incomplete_normal_bl);
GC_copy_bl(GC_old_stack_bl, GC_incomplete_stack_bl);
}
-/* P is not a valid pointer reference, but it falls inside */
-/* the plausible heap bounds. */
-/* Add it to the normal incomplete black list if appropriate. */
+/* P is not a valid pointer reference, but it falls inside */
+/* the plausible heap bounds. */
+/* Add it to the normal incomplete black list if appropriate. */
#ifdef PRINT_BLACK_LIST
- void GC_add_to_black_list_normal(word p, ptr_t source)
+ GC_INNER void GC_add_to_black_list_normal(word p, ptr_t source)
#else
- void GC_add_to_black_list_normal(word p)
+ GC_INNER void GC_add_to_black_list_normal(word p)
#endif
{
if (!(GC_modws_valid_offsets[p & (sizeof(word)-1)])) return;
{
word index = PHT_HASH((word)p);
-
+
if (HDR(p) == 0 || get_pht_entry_from_index(GC_old_normal_bl, index)) {
-# ifdef PRINT_BLACK_LIST
- if (!get_pht_entry_from_index(GC_incomplete_normal_bl, index)) {
- GC_err_printf(
- "Black listing (normal) %p referenced from %p ",
- (ptr_t) p, source);
- GC_print_source_ptr(source);
- GC_err_puts("\n");
- }
+# ifdef PRINT_BLACK_LIST
+ if (!get_pht_entry_from_index(GC_incomplete_normal_bl, index)) {
+ GC_err_printf(
+ "Black listing (normal) %p referenced from %p ",
+ (ptr_t) p, source);
+ GC_print_source_ptr(source);
+ GC_err_puts("\n");
+ }
# endif
set_pht_entry_from_index(GC_incomplete_normal_bl, index);
} /* else this is probably just an interior pointer to an allocated */
- /* object, and isn't worth black listing. */
+ /* object, and isn't worth black listing. */
}
}
/* And the same for false pointers from the stack. */
#ifdef PRINT_BLACK_LIST
- void GC_add_to_black_list_stack(word p, ptr_t source)
+ GC_INNER void GC_add_to_black_list_stack(word p, ptr_t source)
#else
- void GC_add_to_black_list_stack(word p)
+ GC_INNER void GC_add_to_black_list_stack(word p)
#endif
{
word index = PHT_HASH((word)p);
-
+
if (HDR(p) == 0 || get_pht_entry_from_index(GC_old_stack_bl, index)) {
-# ifdef PRINT_BLACK_LIST
- if (!get_pht_entry_from_index(GC_incomplete_stack_bl, index)) {
- GC_err_printf(
- "Black listing (stack) %p referenced from %p ",
- (ptr_t)p, source);
- GC_print_source_ptr(source);
- GC_err_puts("\n");
- }
+# ifdef PRINT_BLACK_LIST
+ if (!get_pht_entry_from_index(GC_incomplete_stack_bl, index)) {
+ GC_err_printf(
+ "Black listing (stack) %p referenced from %p ",
+ (ptr_t)p, source);
+ GC_print_source_ptr(source);
+ GC_err_puts("\n");
+ }
# endif
- set_pht_entry_from_index(GC_incomplete_stack_bl, index);
+ set_pht_entry_from_index(GC_incomplete_stack_bl, index);
}
}
* If (h,len) is not black listed, return 0.
* Knows about the structure of the black list hash tables.
*/
-struct hblk * GC_is_black_listed(struct hblk *h, word len)
+GC_INNER struct hblk * GC_is_black_listed(struct hblk *h, word len)
{
word index = PHT_HASH((word)h);
word i;
return(h+1);
}
}
-
- for (i = 0; ; ) {
+
+ for (i = 0;;) {
if (GC_old_stack_bl[divWORDSZ(index)] == 0
&& GC_incomplete_stack_bl[divWORDSZ(index)] == 0) {
/* An easy case */
return(0);
}
-
-/* Return the number of blacklisted blocks in a given range. */
-/* Used only for statistical purposes. */
-/* Looks only at the GC_incomplete_stack_bl. */
-word GC_number_stack_black_listed(struct hblk *start, struct hblk *endp1)
+/* Return the number of blacklisted blocks in a given range. */
+/* Used only for statistical purposes. */
+/* Looks only at the GC_incomplete_stack_bl. */
+STATIC word GC_number_stack_black_listed(struct hblk *start,
+ struct hblk *endp1)
{
register struct hblk * h;
word result = 0;
-
+
for (h = start; h < endp1; h++) {
word index = PHT_HASH((word)h);
-
+
if (get_pht_entry_from_index(GC_old_stack_bl, index)) result++;
}
return(result);
}
-
/* Return the total number of (stack) black-listed bytes. */
static word total_stack_black_listed(void)
{
register unsigned i;
word total = 0;
-
+
for (i = 0; i < GC_n_heap_sects; i++) {
- struct hblk * start = (struct hblk *) GC_heap_sects[i].hs_start;
- size_t len = (word) GC_heap_sects[i].hs_bytes;
- struct hblk * endp1 = start + len/HBLKSIZE;
-
- total += GC_number_stack_black_listed(start, endp1);
+ struct hblk * start = (struct hblk *) GC_heap_sects[i].hs_start;
+ size_t len = (word) GC_heap_sects[i].hs_bytes;
+ struct hblk * endp1 = start + len/HBLKSIZE;
+
+ total += GC_number_stack_black_listed(start, endp1);
}
return(total * HBLKSIZE);
}
-
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