*/
#include <stdio.h>
-#include "gc_priv.h"
+#include "private/gc_priv.h"
signed_word GC_mem_found = 0;
/* Number of words of memory reclaimed */
-static void report_leak(p, sz)
-ptr_t p;
-word sz;
+#if defined(PARALLEL_MARK) || defined(THREAD_LOCAL_ALLOC)
+ word GC_fl_builder_count = 0;
+ /* Number of threads currently building free lists without */
+ /* holding GC lock. It is not safe to collect if this is */
+ /* nonzero. */
+#endif /* PARALLEL_MARK */
+
+/* We defer printing of leaked objects until we're done with the GC */
+/* cycle, since the routine for printing objects needs to run outside */
+/* the collector, e.g. without the allocation lock. */
+#define MAX_LEAKED 40
+ptr_t GC_leaked[MAX_LEAKED];
+unsigned GC_n_leaked = 0;
+
+GC_bool GC_have_errors = FALSE;
+
+void GC_add_leaked(leaked)
+ptr_t leaked;
{
- if (HDR(p) -> hb_obj_kind == PTRFREE) {
- GC_err_printf0("Leaked atomic object at ");
- } else {
- GC_err_printf0("Leaked composite object at ");
+ if (GC_n_leaked < MAX_LEAKED) {
+ GC_have_errors = TRUE;
+ GC_leaked[GC_n_leaked++] = leaked;
+ /* Make sure it's not reclaimed this cycle */
+ GC_set_mark_bit(leaked);
+ }
+}
+
+static GC_bool printing_errors = FALSE;
+/* Print all objects on the list after printing any smashed objs. */
+/* Clear both lists. */
+void GC_print_all_errors ()
+{
+ unsigned i;
+
+ LOCK();
+ if (printing_errors) {
+ UNLOCK();
+ return;
}
- GC_print_heap_obj(p);
- GC_err_printf0("\n");
+ printing_errors = TRUE;
+ UNLOCK();
+ if (GC_debugging_started) GC_print_all_smashed();
+ for (i = 0; i < GC_n_leaked; ++i) {
+ ptr_t p = GC_leaked[i];
+ if (HDR(p) -> hb_obj_kind == PTRFREE) {
+ GC_err_printf0("Leaked atomic object at ");
+ } else {
+ GC_err_printf0("Leaked composite object at ");
+ }
+ GC_print_heap_obj(p);
+ GC_err_printf0("\n");
+ GC_free(p);
+ GC_leaked[i] = 0;
+ }
+ GC_n_leaked = 0;
+ printing_errors = FALSE;
}
+
# define FOUND_FREE(hblk, word_no) \
{ \
- report_leak((ptr_t)hblk + WORDS_TO_BYTES(word_no), \
- HDR(hblk) -> hb_sz); \
+ GC_add_leaked((ptr_t)hblk + WORDS_TO_BYTES(word_no)); \
}
/*
GC_bool GC_block_empty(hhdr)
register hdr * hhdr;
{
+ /* We treat hb_marks as an array of words here, even if it is */
+ /* actually an array of bytes. Since we only check for zero, there */
+ /* are no endian-ness issues. */
register word *p = (word *)(&(hhdr -> hb_marks[0]));
register word * plim =
- (word *)(&(hhdr -> hb_marks[MARK_BITS_SZ]));
+ (word *)(&(hhdr -> hb_marks[MARK_BITS_SZ]));
while (p < plim) {
if (*p++) return(FALSE);
}
# define GC_block_nearly_full1(hhdr, pat1) DONT_KNOW
# define GC_block_nearly_full3(hhdr, pat1, pat2) DONT_KNOW
# define GC_block_nearly_full(hhdr) DONT_KNOW
-#else
+#endif
+
+#if !defined(SMALL_CONFIG) && defined(USE_MARK_BYTES)
+
+# define GC_block_nearly_full1(hhdr, pat1) GC_block_nearly_full(hhdr)
+# define GC_block_nearly_full3(hhdr, pat1, pat2) GC_block_nearly_full(hhdr)
+
+
+GC_bool GC_block_nearly_full(hhdr)
+register hdr * hhdr;
+{
+ /* We again treat hb_marks as an array of words, even though it */
+ /* isn't. We first sum up all the words, resulting in a word */
+ /* containing 4 or 8 separate partial sums. */
+ /* We then sum the bytes in the word of partial sums. */
+ /* This is still endian independant. This fails if the partial */
+ /* sums can overflow. */
+# if (BYTES_TO_WORDS(MARK_BITS_SZ)) >= 256
+ --> potential overflow; fix the code
+# endif
+ register word *p = (word *)(&(hhdr -> hb_marks[0]));
+ register word * plim =
+ (word *)(&(hhdr -> hb_marks[MARK_BITS_SZ]));
+ word sum_vector = 0;
+ unsigned sum;
+ while (p < plim) {
+ sum_vector += *p;
+ ++p;
+ }
+ sum = 0;
+ while (sum_vector > 0) {
+ sum += sum_vector & 0xff;
+ sum_vector >>= 8;
+ }
+ return (sum > BYTES_TO_WORDS(7*HBLKSIZE/8)/(hhdr -> hb_sz));
+}
+#endif /* USE_MARK_BYTES */
+
+#if !defined(SMALL_CONFIG) && !defined(USE_MARK_BYTES)
/*
* Test whether nearly all of the mark words consist of the same
# if CPP_WORDSZ != 32 && CPP_WORDSZ != 64
return DONT_KNOW; /* Shouldn't be used in any standard config. */
# endif
- if (0 != HDR_WORDS) return DONT_KNOW;
- /* Also shouldn't happen */
# if CPP_WORDSZ == 32
switch(sz) {
case 1:
}
# endif
}
-#endif /* !SMALL_CONFIG */
+#endif /* !SMALL_CONFIG && !USE_MARK_BYTES */
-# ifdef GATHERSTATS
+/* We keep track of reclaimed memory if we are either asked to, or */
+/* we are using the parallel marker. In the latter case, we assume */
+/* that most allocation goes through GC_malloc_many for scalability. */
+/* GC_malloc_many needs the count anyway. */
+# if defined(GATHERSTATS) || defined(PARALLEL_MARK)
# define INCR_WORDS(sz) n_words_found += (sz)
+# define COUNT_PARAM , count
+# define COUNT_ARG , count
+# define COUNT_DECL signed_word * count;
+# define NWORDS_DECL signed_word n_words_found = 0;
+# define COUNT_UPDATE *count += n_words_found;
+# define MEM_FOUND_ADDR , &GC_mem_found
# else
# define INCR_WORDS(sz)
+# define COUNT_PARAM
+# define COUNT_ARG
+# define COUNT_DECL
+# define NWORDS_DECL
+# define COUNT_UPDATE
+# define MEM_FOUND_ADDR
# endif
/*
* Restore unmarked small objects in h of size sz to the object
* Clears unmarked objects.
*/
/*ARGSUSED*/
-ptr_t GC_reclaim_clear(hbp, hhdr, sz, list)
+ptr_t GC_reclaim_clear(hbp, hhdr, sz, list COUNT_PARAM)
register struct hblk *hbp; /* ptr to current heap block */
register hdr * hhdr;
register ptr_t list;
register word sz;
+COUNT_DECL
{
register int word_no;
register word *p, *q, *plim;
-# ifdef GATHERSTATS
- register int n_words_found = 0;
-# endif
+ NWORDS_DECL
+ GC_ASSERT(hhdr == GC_find_header((ptr_t)hbp));
p = (word *)(hbp->hb_body);
- word_no = HDR_WORDS;
+ word_no = 0;
plim = (word *)((((word)hbp) + HBLKSIZE)
- WORDS_TO_BYTES(sz));
list = ((ptr_t)p);
/* Clear object, advance p to next object in the process */
q = p + sz;
- p++; /* Skip link field */
- while (p < q) {
+# ifdef USE_MARK_BYTES
+ GC_ASSERT(!(sz & 1)
+ && !((word)p & (2 * sizeof(word) - 1)));
+ p[1] = 0;
+ p += 2;
+ while (p < q) {
+ CLEAR_DOUBLE(p);
+ p += 2;
+ }
+# else
+ p++; /* Skip link field */
+ while (p < q) {
*p++ = 0;
- }
+ }
+# endif
}
word_no += sz;
}
-# ifdef GATHERSTATS
- GC_mem_found += n_words_found;
-# endif
+ COUNT_UPDATE
return(list);
}
-#ifndef SMALL_CONFIG
+#if !defined(SMALL_CONFIG) && !defined(USE_MARK_BYTES)
/*
* A special case for 2 word composite objects (e.g. cons cells):
*/
/*ARGSUSED*/
-ptr_t GC_reclaim_clear2(hbp, hhdr, list)
+ptr_t GC_reclaim_clear2(hbp, hhdr, list COUNT_PARAM)
register struct hblk *hbp; /* ptr to current heap block */
hdr * hhdr;
register ptr_t list;
+COUNT_DECL
{
- register word * mark_word_addr = &(hhdr->hb_marks[divWORDSZ(HDR_WORDS)]);
+ register word * mark_word_addr = &(hhdr->hb_marks[0]);
register word *p, *plim;
-# ifdef GATHERSTATS
- register int n_words_found = 0;
-# endif
register word mark_word;
register int i;
+ NWORDS_DECL
# define DO_OBJ(start_displ) \
if (!(mark_word & ((word)1 << start_displ))) { \
p[start_displ] = (word)list; \
mark_word >>= 8;
}
}
-# ifdef GATHERSTATS
- GC_mem_found += n_words_found;
-# endif
+ COUNT_UPDATE
return(list);
# undef DO_OBJ
}
* Another special case for 4 word composite objects:
*/
/*ARGSUSED*/
-ptr_t GC_reclaim_clear4(hbp, hhdr, list)
+ptr_t GC_reclaim_clear4(hbp, hhdr, list COUNT_PARAM)
register struct hblk *hbp; /* ptr to current heap block */
hdr * hhdr;
register ptr_t list;
+COUNT_DECL
{
- register word * mark_word_addr = &(hhdr->hb_marks[divWORDSZ(HDR_WORDS)]);
+ register word * mark_word_addr = &(hhdr->hb_marks[0]);
register word *p, *plim;
-# ifdef GATHERSTATS
- register int n_words_found = 0;
-# endif
register word mark_word;
+ NWORDS_DECL
# define DO_OBJ(start_displ) \
if (!(mark_word & ((word)1 << start_displ))) { \
p[start_displ] = (word)list; \
# endif
p += WORDSZ;
}
-# ifdef GATHERSTATS
- GC_mem_found += n_words_found;
-# endif
+ COUNT_UPDATE
return(list);
# undef DO_OBJ
}
-#endif /* !SMALL_CONFIG */
+#endif /* !SMALL_CONFIG && !USE_MARK_BYTES */
/* The same thing, but don't clear objects: */
/*ARGSUSED*/
-ptr_t GC_reclaim_uninit(hbp, hhdr, sz, list)
+ptr_t GC_reclaim_uninit(hbp, hhdr, sz, list COUNT_PARAM)
register struct hblk *hbp; /* ptr to current heap block */
register hdr * hhdr;
register ptr_t list;
register word sz;
+COUNT_DECL
{
- register int word_no;
+ register int word_no = 0;
register word *p, *plim;
-# ifdef GATHERSTATS
- register int n_words_found = 0;
-# endif
+ NWORDS_DECL
p = (word *)(hbp->hb_body);
- word_no = HDR_WORDS;
plim = (word *)((((word)hbp) + HBLKSIZE)
- WORDS_TO_BYTES(sz));
p += sz;
word_no += sz;
}
-# ifdef GATHERSTATS
- GC_mem_found += n_words_found;
-# endif
+ COUNT_UPDATE
return(list);
}
register hdr * hhdr;
register word sz;
{
- register int word_no;
+ register int word_no = 0;
register word *p, *plim;
# ifdef GATHERSTATS
register int n_words_found = 0;
# endif
p = (word *)(hbp->hb_body);
- word_no = HDR_WORDS;
plim = (word *)((((word)hbp) + HBLKSIZE)
- WORDS_TO_BYTES(sz));
}
}
-#ifndef SMALL_CONFIG
+#if !defined(SMALL_CONFIG) && !defined(USE_MARK_BYTES)
/*
* Another special case for 2 word atomic objects:
*/
/*ARGSUSED*/
-ptr_t GC_reclaim_uninit2(hbp, hhdr, list)
+ptr_t GC_reclaim_uninit2(hbp, hhdr, list COUNT_PARAM)
register struct hblk *hbp; /* ptr to current heap block */
hdr * hhdr;
register ptr_t list;
+COUNT_DECL
{
- register word * mark_word_addr = &(hhdr->hb_marks[divWORDSZ(HDR_WORDS)]);
+ register word * mark_word_addr = &(hhdr->hb_marks[0]);
register word *p, *plim;
-# ifdef GATHERSTATS
- register int n_words_found = 0;
-# endif
register word mark_word;
register int i;
+ NWORDS_DECL
# define DO_OBJ(start_displ) \
if (!(mark_word & ((word)1 << start_displ))) { \
p[start_displ] = (word)list; \
mark_word >>= 8;
}
}
-# ifdef GATHERSTATS
- GC_mem_found += n_words_found;
-# endif
+ COUNT_UPDATE
return(list);
# undef DO_OBJ
}
* Another special case for 4 word atomic objects:
*/
/*ARGSUSED*/
-ptr_t GC_reclaim_uninit4(hbp, hhdr, list)
+ptr_t GC_reclaim_uninit4(hbp, hhdr, list COUNT_PARAM)
register struct hblk *hbp; /* ptr to current heap block */
hdr * hhdr;
register ptr_t list;
+COUNT_DECL
{
- register word * mark_word_addr = &(hhdr->hb_marks[divWORDSZ(HDR_WORDS)]);
+ register word * mark_word_addr = &(hhdr->hb_marks[0]);
register word *p, *plim;
-# ifdef GATHERSTATS
- register int n_words_found = 0;
-# endif
register word mark_word;
+ NWORDS_DECL
# define DO_OBJ(start_displ) \
if (!(mark_word & ((word)1 << start_displ))) { \
p[start_displ] = (word)list; \
# endif
p += WORDSZ;
}
-# ifdef GATHERSTATS
- GC_mem_found += n_words_found;
-# endif
+ COUNT_UPDATE
return(list);
# undef DO_OBJ
}
/* Finally the one word case, which never requires any clearing: */
/*ARGSUSED*/
-ptr_t GC_reclaim1(hbp, hhdr, list)
+ptr_t GC_reclaim1(hbp, hhdr, list COUNT_PARAM)
register struct hblk *hbp; /* ptr to current heap block */
hdr * hhdr;
register ptr_t list;
+COUNT_DECL
{
- register word * mark_word_addr = &(hhdr->hb_marks[divWORDSZ(HDR_WORDS)]);
+ register word * mark_word_addr = &(hhdr->hb_marks[0]);
register word *p, *plim;
-# ifdef GATHERSTATS
- register int n_words_found = 0;
-# endif
register word mark_word;
register int i;
+ NWORDS_DECL
# define DO_OBJ(start_displ) \
if (!(mark_word & ((word)1 << start_displ))) { \
p[start_displ] = (word)list; \
mark_word >>= 4;
}
}
-# ifdef GATHERSTATS
- GC_mem_found += n_words_found;
-# endif
+ COUNT_UPDATE
return(list);
# undef DO_OBJ
}
-#endif /* !SMALL_CONFIG */
+#endif /* !SMALL_CONFIG && !USE_MARK_BYTES */
/*
- * Restore unmarked small objects in the block pointed to by hbp
- * to the appropriate object free list.
- * If entirely empty blocks are to be completely deallocated, then
- * caller should perform that check.
+ * Generic procedure to rebuild a free list in hbp.
+ * Also called directly from GC_malloc_many.
*/
-void GC_reclaim_small_nonempty_block(hbp, report_if_found)
-register struct hblk *hbp; /* ptr to current heap block */
-int report_if_found; /* Abort if a reclaimable object is found */
+ptr_t GC_reclaim_generic(hbp, hhdr, sz, init, list COUNT_PARAM)
+struct hblk *hbp; /* ptr to current heap block */
+hdr * hhdr;
+GC_bool init;
+ptr_t list;
+word sz;
+COUNT_DECL
{
- hdr * hhdr;
- word sz; /* size of objects in current block */
- struct obj_kind * ok;
- ptr_t * flh;
- int kind;
- GC_bool full;
-
- hhdr = HDR(hbp);
- sz = hhdr -> hb_sz;
- hhdr -> hb_last_reclaimed = (unsigned short) GC_gc_no;
- kind = hhdr -> hb_obj_kind;
- ok = &GC_obj_kinds[kind];
- flh = &(ok -> ok_freelist[sz]);
+ ptr_t result = list;
- if (report_if_found) {
- GC_reclaim_check(hbp, hhdr, sz);
- } else if (ok -> ok_init) {
+ GC_ASSERT(GC_find_header((ptr_t)hbp) == hhdr);
+ GC_remove_protection(hbp, 1, (hhdr)->hb_descr == 0 /* Pointer-free? */);
+ if (init) {
switch(sz) {
-# ifndef SMALL_CONFIG
+# if !defined(SMALL_CONFIG) && !defined(USE_MARK_BYTES)
case 1:
-# if CPP_WORDSZ == 64
- full = GC_block_nearly_full1(hhdr, 0xffffffffffffffffl);
-# else
- full = GC_block_nearly_full1(hhdr, 0xffffffffl);
-# endif
- if (TRUE == full) goto out;
- if (FALSE == full) GC_write_hint(hbp);
- /* In the DONT_KNOW case, we let reclaim fault. */
- *flh = GC_reclaim1(hbp, hhdr, *flh);
+ /* We now issue the hint even if GC_nearly_full returned */
+ /* DONT_KNOW. */
+ result = GC_reclaim1(hbp, hhdr, list COUNT_ARG);
break;
case 2:
-# if CPP_WORDSZ == 64
- full = GC_block_nearly_full1(hhdr, 0x5555555555555555l);
-# else
- full = GC_block_nearly_full1(hhdr, 0x55555555l);
-# endif
- if (TRUE == full) goto out;
- if (FALSE == full) GC_write_hint(hbp);
- *flh = GC_reclaim_clear2(hbp, hhdr, *flh);
+ result = GC_reclaim_clear2(hbp, hhdr, list COUNT_ARG);
break;
case 4:
-# if CPP_WORDSZ == 64
- full = GC_block_nearly_full1(hhdr, 0x1111111111111111l);
-# else
- full = GC_block_nearly_full1(hhdr, 0x11111111l);
-# endif
- if (TRUE == full) goto out;
- if (FALSE == full) GC_write_hint(hbp);
- *flh = GC_reclaim_clear4(hbp, hhdr, *flh);
+ result = GC_reclaim_clear4(hbp, hhdr, list COUNT_ARG);
break;
-# endif
+# endif /* !SMALL_CONFIG && !USE_MARK_BYTES */
default:
- full = GC_block_nearly_full(hhdr);
- if (TRUE == full) goto out;
- if (FALSE == full) GC_write_hint(hbp);
- *flh = GC_reclaim_clear(hbp, hhdr, sz, *flh);
+ result = GC_reclaim_clear(hbp, hhdr, sz, list COUNT_ARG);
break;
}
} else {
+ GC_ASSERT((hhdr)->hb_descr == 0 /* Pointer-free block */);
switch(sz) {
-# ifndef SMALL_CONFIG
+# if !defined(SMALL_CONFIG) && !defined(USE_MARK_BYTES)
case 1:
-# if CPP_WORDSZ == 64
- full = GC_block_nearly_full1(hhdr, 0xffffffffffffffffl);
-# else
- full = GC_block_nearly_full1(hhdr, 0xffffffffl);
-# endif
- if (TRUE == full) goto out;
- if (FALSE == full) GC_write_hint(hbp);
- *flh = GC_reclaim1(hbp, hhdr, *flh);
+ result = GC_reclaim1(hbp, hhdr, list COUNT_ARG);
break;
case 2:
-# if CPP_WORDSZ == 64
- full = GC_block_nearly_full1(hhdr, 0x5555555555555555l);
-# else
- full = GC_block_nearly_full1(hhdr, 0x55555555l);
-# endif
- if (TRUE == full) goto out;
- if (FALSE == full) GC_write_hint(hbp);
- *flh = GC_reclaim_uninit2(hbp, hhdr, *flh);
+ result = GC_reclaim_uninit2(hbp, hhdr, list COUNT_ARG);
break;
case 4:
-# if CPP_WORDSZ == 64
- full = GC_block_nearly_full1(hhdr, 0x1111111111111111l);
-# else
- full = GC_block_nearly_full1(hhdr, 0x11111111l);
-# endif
- if (TRUE == full) goto out;
- if (FALSE == full) GC_write_hint(hbp);
- *flh = GC_reclaim_uninit4(hbp, hhdr, *flh);
+ result = GC_reclaim_uninit4(hbp, hhdr, list COUNT_ARG);
break;
-# endif
+# endif /* !SMALL_CONFIG && !USE_MARK_BYTES */
default:
- full = GC_block_nearly_full(hhdr);
- if (TRUE == full) goto out;
- if (FALSE == full) GC_write_hint(hbp);
- *flh = GC_reclaim_uninit(hbp, hhdr, sz, *flh);
+ result = GC_reclaim_uninit(hbp, hhdr, sz, list COUNT_ARG);
break;
}
}
-out:
- if (IS_UNCOLLECTABLE(kind)) GC_set_hdr_marks(hhdr);
+ if (IS_UNCOLLECTABLE(hhdr -> hb_obj_kind)) GC_set_hdr_marks(hhdr);
+ return result;
+}
+
+/*
+ * Restore unmarked small objects in the block pointed to by hbp
+ * to the appropriate object free list.
+ * If entirely empty blocks are to be completely deallocated, then
+ * caller should perform that check.
+ */
+void GC_reclaim_small_nonempty_block(hbp, report_if_found COUNT_PARAM)
+register struct hblk *hbp; /* ptr to current heap block */
+int report_if_found; /* Abort if a reclaimable object is found */
+COUNT_DECL
+{
+ hdr *hhdr = HDR(hbp);
+ word sz = hhdr -> hb_sz;
+ int kind = hhdr -> hb_obj_kind;
+ struct obj_kind * ok = &GC_obj_kinds[kind];
+ ptr_t * flh = &(ok -> ok_freelist[sz]);
+
+ hhdr -> hb_last_reclaimed = (unsigned short) GC_gc_no;
+
+ if (report_if_found) {
+ GC_reclaim_check(hbp, hhdr, sz);
+ } else {
+ *flh = GC_reclaim_generic(hbp, hhdr, sz,
+ (ok -> ok_init || GC_debugging_started),
+ *flh MEM_FOUND_ADDR);
+ }
}
/*
* If report_if_found is TRUE, then process any block immediately, and
* simply report free objects; do not actually reclaim them.
*/
-void GC_reclaim_block(hbp, report_if_found)
-register struct hblk *hbp; /* ptr to current heap block */
-word report_if_found; /* Abort if a reclaimable object is found */
+# if defined(__STDC__) || defined(__cplusplus)
+ void GC_reclaim_block(register struct hblk *hbp, word report_if_found)
+# else
+ void GC_reclaim_block(hbp, report_if_found)
+ register struct hblk *hbp; /* ptr to current heap block */
+ word report_if_found; /* Abort if a reclaimable object is found */
+# endif
{
register hdr * hhdr;
register word sz; /* size of objects in current block */
ok = &GC_obj_kinds[hhdr -> hb_obj_kind];
if( sz > MAXOBJSZ ) { /* 1 big object */
- if( !mark_bit_from_hdr(hhdr, HDR_WORDS) ) {
+ if( !mark_bit_from_hdr(hhdr, 0) ) {
if (report_if_found) {
- FOUND_FREE(hbp, HDR_WORDS);
+ FOUND_FREE(hbp, 0);
} else {
+ word blocks = OBJ_SZ_TO_BLOCKS(sz);
+ if (blocks > 1) {
+ GC_large_allocd_bytes -= blocks * HBLKSIZE;
+ }
# ifdef GATHERSTATS
GC_mem_found += sz;
# endif
} else {
GC_bool empty = GC_block_empty(hhdr);
if (report_if_found) {
- GC_reclaim_small_nonempty_block(hbp, (int)report_if_found);
+ GC_reclaim_small_nonempty_block(hbp, (int)report_if_found
+ MEM_FOUND_ADDR);
} else if (empty) {
# ifdef GATHERSTATS
GC_mem_found += BYTES_TO_WORDS(HBLKSIZE);
# endif
GC_freehblk(hbp);
- } else {
+ } else if (TRUE != GC_block_nearly_full(hhdr)){
/* group of smaller objects, enqueue the real work */
rlh = &(ok -> ok_reclaim_list[sz]);
hhdr -> hb_next = *rlh;
*rlh = hbp;
- }
+ } /* else not worth salvaging. */
+ /* We used to do the nearly_full check later, but we */
+ /* already have the right cache context here. Also */
+ /* doing it here avoids some silly lock contention in */
+ /* GC_malloc_many. */
}
}
/* Routines to gather and print heap block info */
/* intended for debugging. Otherwise should be called */
/* with lock. */
-static size_t number_of_blocks;
-static size_t total_bytes;
+
+struct Print_stats
+{
+ size_t number_of_blocks;
+ size_t total_bytes;
+};
+
+#ifdef USE_MARK_BYTES
+
+/* Return the number of set mark bits in the given header */
+int GC_n_set_marks(hhdr)
+hdr * hhdr;
+{
+ register int result = 0;
+ register int i;
+
+ for (i = 0; i < MARK_BITS_SZ; i++) {
+ result += hhdr -> hb_marks[i];
+ }
+ return(result);
+}
+
+#else
/* Number of set bits in a word. Not performance critical. */
static int set_bits(n)
return(result);
}
+#endif /* !USE_MARK_BYTES */
+
/*ARGSUSED*/
-void GC_print_block_descr(h, dummy)
-struct hblk *h;
-word dummy;
+# if defined(__STDC__) || defined(__cplusplus)
+ void GC_print_block_descr(struct hblk *h, word dummy)
+# else
+ void GC_print_block_descr(h, dummy)
+ struct hblk *h;
+ word dummy;
+# endif
{
register hdr * hhdr = HDR(h);
register size_t bytes = WORDS_TO_BYTES(hhdr -> hb_sz);
+ struct Print_stats *ps;
GC_printf3("(%lu:%lu,%lu)", (unsigned long)(hhdr -> hb_obj_kind),
(unsigned long)bytes,
(unsigned long)(GC_n_set_marks(hhdr)));
- bytes += HDR_BYTES + HBLKSIZE-1;
+ bytes += HBLKSIZE-1;
bytes &= ~(HBLKSIZE-1);
- total_bytes += bytes;
- number_of_blocks++;
+
+ ps = (struct Print_stats *)dummy;
+ ps->total_bytes += bytes;
+ ps->number_of_blocks++;
}
void GC_print_block_list()
{
- GC_printf0("(kind(0=ptrfree,1=normal,2=unc.,3=stubborn):size_in_bytes, #_marks_set)\n");
- number_of_blocks = 0;
- total_bytes = 0;
- GC_apply_to_all_blocks(GC_print_block_descr, (word)0);
+ struct Print_stats pstats;
+
+ GC_printf1("(kind(0=ptrfree,1=normal,2=unc.,%lu=stubborn):size_in_bytes, #_marks_set)\n", STUBBORN);
+ pstats.number_of_blocks = 0;
+ pstats.total_bytes = 0;
+ GC_apply_to_all_blocks(GC_print_block_descr, (word)&pstats);
GC_printf2("\nblocks = %lu, bytes = %lu\n",
- (unsigned long)number_of_blocks,
- (unsigned long)total_bytes);
+ (unsigned long)pstats.number_of_blocks,
+ (unsigned long)pstats.total_bytes);
}
#endif /* NO_DEBUGGING */
/*
+ * Clear all obj_link pointers in the list of free objects *flp.
+ * Clear *flp.
+ * This must be done before dropping a list of free gcj-style objects,
+ * since may otherwise end up with dangling "descriptor" pointers.
+ * It may help for other pointer-containing objects.
+ */
+void GC_clear_fl_links(flp)
+ptr_t *flp;
+{
+ ptr_t next = *flp;
+
+ while (0 != next) {
+ *flp = 0;
+ flp = &(obj_link(next));
+ next = *flp;
+ }
+}
+
+/*
* Perform GC_reclaim_block on the entire heap, after first clearing
* small object free lists (if we are not just looking for leaks).
*/
{
int kind;
+# if defined(PARALLEL_MARK) || defined(THREAD_LOCAL_ALLOC)
+ GC_ASSERT(0 == GC_fl_builder_count);
+# endif
/* Clear reclaim- and free-lists */
for (kind = 0; kind < GC_n_kinds; kind++) {
- register ptr_t *fop;
- register ptr_t *lim;
- register struct hblk ** rlp;
- register struct hblk ** rlim;
- register struct hblk ** rlist = GC_obj_kinds[kind].ok_reclaim_list;
+ ptr_t *fop;
+ ptr_t *lim;
+ struct hblk ** rlp;
+ struct hblk ** rlim;
+ struct hblk ** rlist = GC_obj_kinds[kind].ok_reclaim_list;
+ GC_bool should_clobber = (GC_obj_kinds[kind].ok_descriptor != 0);
if (rlist == 0) continue; /* This kind not used. */
if (!report_if_found) {
lim = &(GC_obj_kinds[kind].ok_freelist[MAXOBJSZ+1]);
for( fop = GC_obj_kinds[kind].ok_freelist; fop < lim; fop++ ) {
- *fop = 0;
+ if (*fop != 0) {
+ if (should_clobber) {
+ GC_clear_fl_links(fop);
+ } else {
+ *fop = 0;
+ }
+ }
}
} /* otherwise free list objects are marked, */
/* and its safe to leave them */
/* so that you can convince yourself that it really is very stupid. */
GC_reclaim_all((GC_stop_func)0, FALSE);
# endif
+# if defined(PARALLEL_MARK) || defined(THREAD_LOCAL_ALLOC)
+ GC_ASSERT(0 == GC_fl_builder_count);
+# endif
}
while ((hbp = *rlh) != 0) {
hhdr = HDR(hbp);
*rlh = hhdr -> hb_next;
- GC_reclaim_small_nonempty_block(hbp, FALSE);
+ GC_reclaim_small_nonempty_block(hbp, FALSE MEM_FOUND_ADDR);
if (*flh != 0) break;
}
}
/* It's likely we'll need it this time, too */
/* It's been touched recently, so this */
/* shouldn't trigger paging. */
- GC_reclaim_small_nonempty_block(hbp, FALSE);
+ GC_reclaim_small_nonempty_block(hbp, FALSE MEM_FOUND_ADDR);
}
}
}
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