Imported version version 6.0alpha7.

	* README, README.Mac, README.OS2, README.QUICK, README.alpha,
	README.amiga, README.debugging, README.dj, README.hp, README.linux,
	README.rs6000, README.sgi, README.solaris2, README.uts,
	README.win32, SCoptions.amiga, backptr.h, barrett_diagram,
	dbg_mlc.h, gc.h, gc.man, gc_alloc.h, gc_cpp.h, gc_hdrs.h, gc_mark.h,
	gc_priv.h, gc_private.h, gc_typed.h, gcconfig.h,
	hpux_irix_threads.c, makefile.depend, nursery.c,
	solaris_threads.h, test.c, test_cpp.cc, weakpointer.h, cord/README,
	cord/SCOPTIONS.amiga, cord/SMakefile.amiga, cord/cord.h,
	cord/ec.h, cord/gc.h, cord/private/cord_pos.h, include/backptr.h,
	include/gc_copy_descr.h, include/gc_nursery.h: Remove obsolete/moved
	files.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@42379 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 92 insertions, 31 deletions

diff --git a/boehm-gc/allchblk.c b/boehm-gc/allchblk.c
index 1505f8e2c71..5b7bcff050f 100644
--- a/boehm-gc/allchblk.c
+++ b/boehm-gc/allchblk.c
@@ -14,10 +14,9 @@
  * modified is included with the above copyright notice.
  */
 
-#define DEBUG
-#undef DEBUG
+/* #define DEBUG */
 #include <stdio.h>
-#include "gc_priv.h"
+#include "private/gc_priv.h"
 
 GC_bool GC_use_entire_heap = 0;
 
@@ -47,6 +46,35 @@ GC_bool GC_use_entire_heap = 0;
 
 struct hblk * GC_hblkfreelist[N_HBLK_FLS+1] = { 0 };
 
+#ifndef USE_MUNMAP
+  word GC_free_bytes[N_HBLK_FLS+1] = { 0 };
+	/* Number of free bytes on each list.	*/
+
+  /* Is bytes + the number of free bytes on lists n .. N_HBLK_FLS 	*/
+  /* > GC_max_large_allocd_bytes?					*/
+  GC_bool GC_enough_large_bytes_left(bytes,n)
+  word bytes;
+  int n;
+  {
+    int i;
+    for (i = N_HBLK_FLS; i >= n; --i) {
+	bytes += GC_free_bytes[i];
+	if (bytes > GC_max_large_allocd_bytes) return TRUE;
+    }
+    return FALSE;
+  }
+
+# define INCR_FREE_BYTES(n, b) GC_free_bytes[n] += (b);
+
+# define FREE_ASSERT(e) GC_ASSERT(e)
+
+#else /* USE_MUNMAP */
+
+# define INCR_FREE_BYTES(n, b)
+# define FREE_ASSERT(e)
+
+#endif /* USE_MUNMAP */
+
 /* Map a number of blocks to the appropriate large block free list index. */
 int GC_hblk_fl_from_blocks(blocks_needed)
 word blocks_needed;
@@ -79,7 +107,14 @@ void GC_print_hblkfreelist()
     
     for (i = 0; i <= N_HBLK_FLS; ++i) {
       h = GC_hblkfreelist[i];
-      if (0 != h) GC_printf1("Free list %ld:\n", (unsigned long)i);
+#     ifdef USE_MUNMAP
+        if (0 != h) GC_printf1("Free list %ld (Total size %ld):\n",
+		               (unsigned long)i);
+#     else
+        if (0 != h) GC_printf2("Free list %ld (Total size %ld):\n",
+		               (unsigned long)i,
+			       (unsigned long)GC_free_bytes[i]);
+#     endif
       while (h != 0) {
         hhdr = HDR(h);
         sz = hhdr -> hb_sz;
@@ -219,14 +254,25 @@ void GC_remove_from_fl(hhdr, n)
 hdr * hhdr;
 int n;
 {
+    int index;
+
     GC_ASSERT(((hhdr -> hb_sz) & (HBLKSIZE-1)) == 0);
+#   ifndef USE_MUNMAP
+      /* We always need index to mainatin free counts.	*/
+      if (FL_UNKNOWN == n) {
+          index = GC_hblk_fl_from_blocks(divHBLKSZ(hhdr -> hb_sz));
+      } else {
+	  index = n;
+      }
+#   endif
     if (hhdr -> hb_prev == 0) {
-        int index;
-	if (FL_UNKNOWN == n) {
+#	ifdef USE_MUNMAP
+	  if (FL_UNKNOWN == n) {
             index = GC_hblk_fl_from_blocks(divHBLKSZ(hhdr -> hb_sz));
-	} else {
+	  } else {
 	    index = n;
-	}
+	  }
+#	endif
 	GC_ASSERT(HDR(GC_hblkfreelist[index]) == hhdr);
 	GC_hblkfreelist[index] = hhdr -> hb_next;
     } else {
@@ -234,6 +280,8 @@ int n;
 	GET_HDR(hhdr -> hb_prev, phdr);
 	phdr -> hb_next = hhdr -> hb_next;
     }
+    INCR_FREE_BYTES(index, - (signed_word)(hhdr -> hb_sz));
+    FREE_ASSERT(GC_free_bytes[index] >= 0);
     if (0 != hhdr -> hb_next) {
 	hdr * nhdr;
 	GC_ASSERT(!IS_FORWARDING_ADDR_OR_NIL(NHDR(hhdr)));
@@ -294,6 +342,8 @@ hdr * hhdr;
 #   endif
     GC_ASSERT(((hhdr -> hb_sz) & (HBLKSIZE-1)) == 0);
     GC_hblkfreelist[index] = h;
+    INCR_FREE_BYTES(index, hhdr -> hb_sz);
+    FREE_ASSERT(GC_free_bytes[index] <= GC_large_free_bytes)
     hhdr -> hb_next = second;
     hhdr -> hb_prev = 0;
     if (0 != second) {
@@ -419,7 +469,7 @@ int index;
     rest_hdr -> hb_sz = total_size - bytes;
     rest_hdr -> hb_flags = 0;
 #   ifdef GC_ASSERTIONS
-      // Mark h not free, to avoid assertion about adjacent free blocks.
+      /* Mark h not free, to avoid assertion about adjacent free blocks. */
         hhdr -> hb_map = 0;
 #   endif
     GC_add_to_fl(rest, rest_hdr);
@@ -463,6 +513,8 @@ int index;	/* Index of free list */
       if (0 != next) {
 	HDR(next) -> hb_prev = n;
       }
+      INCR_FREE_BYTES(index, -(signed_word)h_size);
+      FREE_ASSERT(GC_free_bytes[index] > 0);
 #     ifdef GC_ASSERTIONS
 	nhdr -> hb_map = 0;	/* Don't fail test for consecutive	*/
 				/* free blocks in GC_add_to_fl.		*/
@@ -484,20 +536,23 @@ struct hblk * GC_allochblk_nth();
  * NOTE: We set obj_map field in header correctly.
  *       Caller is responsible for building an object freelist in block.
  *
- * We clear the block if it is destined for large objects, and if
- * kind requires that newly allocated objects be cleared.
+ * Unlike older versions of the collectors, the client is responsible
+ * for clearing the block, if necessary.
  */
 struct hblk *
 GC_allochblk(sz, kind, flags)
 word sz;
 int kind;
-unsigned char flags;  /* IGNORE_OFF_PAGE or 0 */
+unsigned flags;  /* IGNORE_OFF_PAGE or 0 */
 {
-    int start_list = GC_hblk_fl_from_blocks(OBJ_SZ_TO_BLOCKS(sz));
+    word blocks = OBJ_SZ_TO_BLOCKS(sz);
+    int start_list = GC_hblk_fl_from_blocks(blocks);
     int i;
     for (i = start_list; i <= N_HBLK_FLS; ++i) {
 	struct hblk * result = GC_allochblk_nth(sz, kind, flags, i);
-	if (0 != result) return result;
+	if (0 != result) {
+	    return result;
+	}
     }
     return 0;
 }
@@ -526,12 +581,22 @@ int n;
 	    GET_HDR(hbp, hhdr);
 	    size_avail = hhdr->hb_sz;
 	    if (size_avail < size_needed) continue;
-	    if (!GC_use_entire_heap) {
-		if (size_avail != size_needed
-		    && USED_HEAP_SIZE >= GC_requested_heapsize
-		    && !GC_incremental && GC_should_collect()) {
+	    if (!GC_use_entire_heap
+		&& size_avail != size_needed
+		&& USED_HEAP_SIZE >= GC_requested_heapsize
+		&& !GC_incremental && GC_should_collect()) {
+#		ifdef USE_MUNMAP
 		    continue;
-		} 
+#		else
+		    /* If we enough large blocks left to cover any	*/
+		    /* previous request for large blocks, we go ahead	*/
+		    /* and split.  Assuming a steady state, that should	*/
+		    /* be safe.  It means that we can use the full 	*/
+		    /* heap if we allocate only small objects.		*/
+		    if (!GC_enough_large_bytes_left(GC_large_allocd_bytes, n)) {
+		      continue;
+		    } 
+#		endif /* !USE_MUNMAP */
 	    }
 	    /* If the next heap block is obviously better, go on.	*/
 	    /* This prevents us from disassembling a single large block */
@@ -573,7 +638,7 @@ int n;
 		  /* Make sure it's mapped before we mangle it. */
 #		    ifdef USE_MUNMAP
 		      if (!IS_MAPPED(hhdr)) {
-		        GC_remap((ptr_t)hbp, size_avail);
+		        GC_remap((ptr_t)hbp, hhdr -> hb_sz);
 		        hhdr -> hb_flags &= ~WAS_UNMAPPED;
 		      }
 #		    endif
@@ -589,8 +654,10 @@ int n;
 	                 && orig_avail - size_needed
 			    > (signed_word)BL_LIMIT) {
 	        /* Punt, since anything else risks unreasonable heap growth. */
-	        WARN("Needed to allocate blacklisted block at 0x%lx\n",
-		     (word)hbp);
+		if (0 != GETENV("GC_NO_BLACKLIST_WARNING")) {
+	          WARN("Needed to allocate blacklisted block at 0x%lx\n",
+		       (word)hbp);
+		}
 	        size_avail = orig_avail;
 	      } else if (size_avail == 0 && size_needed == HBLKSIZE
 			 && IS_MAPPED(hhdr)) {
@@ -618,10 +685,10 @@ int n;
 	                if (h == hbp || 0 != (hhdr = GC_install_header(h))) {
 	                  (void) setup_header(
 	                	  hhdr,
-	              		  BYTES_TO_WORDS(HBLKSIZE - HDR_BYTES),
+	              		  BYTES_TO_WORDS(HBLKSIZE),
 	              		  PTRFREE, 0); /* Cant fail */
 	              	  if (GC_debugging_started) {
-	              	    BZERO(h + HDR_BYTES, HBLKSIZE - HDR_BYTES);
+	              	    BZERO(h, HBLKSIZE);
 	              	  }
 	                }
 	              }
@@ -638,7 +705,7 @@ int n;
 	    if( size_avail >= size_needed ) {
 #		ifdef USE_MUNMAP
 		  if (!IS_MAPPED(hhdr)) {
-		    GC_remap((ptr_t)hbp, size_avail);
+		    GC_remap((ptr_t)hbp, hhdr -> hb_sz);
 		    hhdr -> hb_flags &= ~WAS_UNMAPPED;
 		  }
 #	        endif
@@ -664,12 +731,6 @@ int n;
             return(0); /* ditto */
         }
         
-    /* Clear block if necessary */
-	if (GC_debugging_started
-	    || sz > MAXOBJSZ && GC_obj_kinds[kind].ok_init) {
-	    BZERO(hbp + HDR_BYTES,  size_needed - HDR_BYTES);
-	}
-
     /* We just successfully allocated a block.  Restart count of	*/
     /* consecutive failures.						*/
     {