Initial revision

1 files changed, 799 insertions, 0 deletions

diff --git a/gc/dbg_mlc.c b/gc/dbg_mlc.c
new file mode 100644
index 0000000..6483256
--- /dev/null
+++ b/gc/dbg_mlc.c
@@ -0,0 +1,799 @@
+/* 
+ * Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
+ * Copyright (c) 1991-1995 by Xerox Corporation.  All rights reserved.
+ * Copyright (c) 1997 by Silicon Graphics.  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.
+ */
+# define I_HIDE_POINTERS
+# include "gc_priv.h"
+# ifdef KEEP_BACK_PTRS
+#   include "backptr.h"
+# endif
+
+void GC_default_print_heap_obj_proc();
+GC_API void GC_register_finalizer_no_order
+    	GC_PROTO((GC_PTR obj, GC_finalization_proc fn, GC_PTR cd,
+		  GC_finalization_proc *ofn, GC_PTR *ocd));
+
+/* Do we want to and know how to save the call stack at the time of	*/
+/* an allocation?  How much space do we want to use in each object?	*/
+
+# define START_FLAG ((word)0xfedcedcb)
+# define END_FLAG ((word)0xbcdecdef)
+	/* Stored both one past the end of user object, and one before	*/
+	/* the end of the object as seen by the allocator.		*/
+
+
+/* Object header */
+typedef struct {
+#   ifdef KEEP_BACK_PTRS
+	ptr_t oh_back_ptr;
+#	define MARKED_FOR_FINALIZATION (ptr_t)(-1)
+	    /* Object was marked because it is finalizable. */
+#	ifdef ALIGN_DOUBLE
+	  word oh_dummy;
+#	endif
+#   endif
+    char * oh_string;		/* object descriptor string	*/
+    word oh_int;		/* object descriptor integers	*/
+#   ifdef NEED_CALLINFO
+      struct callinfo oh_ci[NFRAMES];
+#   endif
+    word oh_sz;			/* Original malloc arg.		*/
+    word oh_sf;			/* start flag */
+} oh;
+/* The size of the above structure is assumed not to dealign things,	*/
+/* and to be a multiple of the word length.				*/
+
+#define DEBUG_BYTES (sizeof (oh) + sizeof (word))
+#undef ROUNDED_UP_WORDS
+#define ROUNDED_UP_WORDS(n) BYTES_TO_WORDS((n) + WORDS_TO_BYTES(1) - 1)
+
+
+#ifdef SAVE_CALL_CHAIN
+#   define ADD_CALL_CHAIN(base, ra) GC_save_callers(((oh *)(base)) -> oh_ci)
+#   define PRINT_CALL_CHAIN(base) GC_print_callers(((oh *)(base)) -> oh_ci)
+#else
+# ifdef GC_ADD_CALLER
+#   define ADD_CALL_CHAIN(base, ra) ((oh *)(base)) -> oh_ci[0].ci_pc = (ra)
+#   define PRINT_CALL_CHAIN(base) GC_print_callers(((oh *)(base)) -> oh_ci)
+# else
+#   define ADD_CALL_CHAIN(base, ra)
+#   define PRINT_CALL_CHAIN(base)
+# endif
+#endif
+
+/* Check whether object with base pointer p has debugging info	*/ 
+/* p is assumed to point to a legitimate object in our part	*/
+/* of the heap.							*/
+GC_bool GC_has_debug_info(p)
+ptr_t p;
+{
+    register oh * ohdr = (oh *)p;
+    register ptr_t body = (ptr_t)(ohdr + 1);
+    register word sz = GC_size((ptr_t) ohdr);
+    
+    if (HBLKPTR((ptr_t)ohdr) != HBLKPTR((ptr_t)body)
+        || sz < sizeof (oh)) {
+        return(FALSE);
+    }
+    if (ohdr -> oh_sz == sz) {
+    	/* Object may have had debug info, but has been deallocated	*/
+    	return(FALSE);
+    }
+    if (ohdr -> oh_sf == (START_FLAG ^ (word)body)) return(TRUE);
+    if (((word *)ohdr)[BYTES_TO_WORDS(sz)-1] == (END_FLAG ^ (word)body)) {
+        return(TRUE);
+    }
+    return(FALSE);
+}
+
+#ifdef KEEP_BACK_PTRS
+  /* Store back pointer to source in dest, if that appears to be possible. */
+  /* This is not completely safe, since we may mistakenly conclude that	   */
+  /* dest has a debugging wrapper.  But the error probability is very	   */
+  /* small, and this shouldn't be used in production code.		   */
+  /* We assume that dest is the real base pointer.  Source will usually    */
+  /* be a pointer to the interior of an object.				   */
+  void GC_store_back_pointer(ptr_t source, ptr_t dest)
+  {
+    if (GC_has_debug_info(dest)) {
+      ((oh *)dest) -> oh_back_ptr = (ptr_t)HIDE_POINTER(source);
+    }
+  }
+
+  void GC_marked_for_finalization(ptr_t dest) {
+    GC_store_back_pointer(MARKED_FOR_FINALIZATION, dest);
+  }
+
+  /* Store information about the object referencing dest in *base_p	*/
+  /* and *offset_p.							*/
+  /*   source is root ==> *base_p = 0, *offset_p = address		*/
+  /*   source is heap object ==> *base_p != 0, *offset_p = offset 	*/
+  /*   Returns 1 on success, 0 if source couldn't be determined.	*/
+  /* Dest can be any address within a heap object.			*/
+  GC_ref_kind GC_get_back_ptr_info(void *dest, void **base_p, size_t *offset_p)
+  {
+    oh * hdr = (oh *)GC_base(dest);
+    ptr_t bp;
+    ptr_t bp_base;
+    if (!GC_has_debug_info((ptr_t) hdr)) return GC_NO_SPACE;
+    bp = hdr -> oh_back_ptr;
+    if (MARKED_FOR_FINALIZATION == bp) return GC_FINALIZER_REFD;
+    if (0 == bp) return GC_UNREFERENCED;
+    bp = REVEAL_POINTER(bp);
+    bp_base = GC_base(bp);
+    if (0 == bp_base) {
+      *base_p = bp;
+      *offset_p = 0;
+      return GC_REFD_FROM_ROOT;
+    } else {
+      if (GC_has_debug_info(bp_base)) bp_base += sizeof(oh);
+      *base_p = bp_base;
+      *offset_p = bp - bp_base;
+      return GC_REFD_FROM_HEAP;
+    }
+  }
+
+  /* Generate a random heap address.		*/
+  /* The resulting address is in the heap, but	*/
+  /* not necessarily inside a valid object.	*/
+  void *GC_generate_random_heap_address(void)
+  {
+    int i;
+    int heap_offset = random() % GC_heapsize;
+    for (i = 0; i < GC_n_heap_sects; ++ i) {
+	int size = GC_heap_sects[i].hs_bytes;
+	if (heap_offset < size) {
+	    return GC_heap_sects[i].hs_start + heap_offset;
+	} else {
+	    heap_offset -= size;
+	}
+    }
+    ABORT("GC_generate_random_heap_address: size inconsistency");
+    /*NOTREACHED*/
+    return 0;
+  }
+
+  /* Generate a random address inside a valid marked heap object. */
+  void *GC_generate_random_valid_address(void)
+  {
+    ptr_t result;
+    ptr_t base;
+    for (;;) {
+	result = GC_generate_random_heap_address();
+  	base = GC_base(result);
+	if (0 == base) continue;
+	if (!GC_is_marked(base)) continue;
+	return result;
+    }
+  }
+
+  /* Force a garbage collection and generate a backtrace from a	*/
+  /* random heap address.					*/
+  void GC_generate_random_backtrace(void)
+  {
+    void * current;
+    int i;
+    void * base;
+    size_t offset;
+    GC_ref_kind source;
+    GC_gcollect();
+    current = GC_generate_random_valid_address();
+    GC_printf1("Chose address 0x%lx in object\n", (unsigned long)current);
+    GC_print_heap_obj(GC_base(current));
+    GC_err_printf0("\n");
+    for (i = 0; ; ++i) {
+      source = GC_get_back_ptr_info(current, &base, &offset);
+      if (GC_UNREFERENCED == source) {
+	GC_err_printf0("Reference could not be found\n");
+  	goto out;
+      }
+      if (GC_NO_SPACE == source) {
+	GC_err_printf0("No debug info in object: Can't find reference\n");
+	goto out;
+      }
+      GC_err_printf1("Reachable via %d levels of pointers from ",
+		 (unsigned long)i);
+      switch(source) {
+	case GC_REFD_FROM_ROOT:
+	  GC_err_printf1("root at 0x%lx\n", (unsigned long)base);
+	  goto out;
+	case GC_FINALIZER_REFD:
+	  GC_err_printf0("list of finalizable objects\n");
+	  goto out;
+	case GC_REFD_FROM_HEAP:
+	  GC_err_printf1("offset %ld in object:\n", (unsigned long)offset);
+	  /* Take GC_base(base) to get real base, i.e. header. */
+	  GC_print_heap_obj(GC_base(base));
+	  GC_err_printf0("\n");
+	  break;
+      }
+      current = base;
+    }
+    out:;
+  }
+    
+#endif /* KEEP_BACK_PTRS */
+
+/* Store debugging info into p.  Return displaced pointer. */
+/* Assumes we don't hold allocation lock.		   */
+ptr_t GC_store_debug_info(p, sz, string, integer)
+register ptr_t p;	/* base pointer */
+word sz; 	/* bytes */
+char * string;
+word integer;
+{
+    register word * result = (word *)((oh *)p + 1);
+    DCL_LOCK_STATE;
+    
+    /* There is some argument that we should dissble signals here.	*/
+    /* But that's expensive.  And this way things should only appear	*/
+    /* inconsistent while we're in the handler.				*/
+    LOCK();
+#   ifdef KEEP_BACK_PTRS
+      ((oh *)p) -> oh_back_ptr = 0;
+#   endif
+    ((oh *)p) -> oh_string = string;
+    ((oh *)p) -> oh_int = integer;
+    ((oh *)p) -> oh_sz = sz;
+    ((oh *)p) -> oh_sf = START_FLAG ^ (word)result;
+    ((word *)p)[BYTES_TO_WORDS(GC_size(p))-1] =
+         result[ROUNDED_UP_WORDS(sz)] = END_FLAG ^ (word)result;
+    UNLOCK();
+    return((ptr_t)result);
+}
+
+/* Check the object with debugging info at ohdr		*/
+/* return NIL if it's OK.  Else return clobbered	*/
+/* address.						*/
+ptr_t GC_check_annotated_obj(ohdr)
+register oh * ohdr;
+{
+    register ptr_t body = (ptr_t)(ohdr + 1);
+    register word gc_sz = GC_size((ptr_t)ohdr);
+    if (ohdr -> oh_sz + DEBUG_BYTES > gc_sz) {
+        return((ptr_t)(&(ohdr -> oh_sz)));
+    }
+    if (ohdr -> oh_sf != (START_FLAG ^ (word)body)) {
+        return((ptr_t)(&(ohdr -> oh_sf)));
+    }
+    if (((word *)ohdr)[BYTES_TO_WORDS(gc_sz)-1] != (END_FLAG ^ (word)body)) {
+        return((ptr_t)((word *)ohdr + BYTES_TO_WORDS(gc_sz)-1));
+    }
+    if (((word *)body)[ROUNDED_UP_WORDS(ohdr -> oh_sz)]
+        != (END_FLAG ^ (word)body)) {
+        return((ptr_t)((word *)body + ROUNDED_UP_WORDS(ohdr -> oh_sz)));
+    }
+    return(0);
+}
+
+void GC_print_obj(p)
+ptr_t p;
+{
+    register oh * ohdr = (oh *)GC_base(p);
+    
+    GC_err_printf1("0x%lx (", ((unsigned long)ohdr + sizeof(oh)));
+    GC_err_puts(ohdr -> oh_string);
+    GC_err_printf2(":%ld, sz=%ld)\n", (unsigned long)(ohdr -> oh_int),
+        			      (unsigned long)(ohdr -> oh_sz));
+    PRINT_CALL_CHAIN(ohdr);
+}
+
+void GC_debug_print_heap_obj_proc(p)
+ptr_t p;
+{
+    if (GC_has_debug_info(p)) {
+	GC_print_obj(p);
+    } else {
+	GC_default_print_heap_obj_proc(p);
+    }
+}
+
+void GC_print_smashed_obj(p, clobbered_addr)
+ptr_t p, clobbered_addr;
+{
+    register oh * ohdr = (oh *)GC_base(p);
+    
+    GC_err_printf2("0x%lx in object at 0x%lx(", (unsigned long)clobbered_addr,
+    					        (unsigned long)p);
+    if (clobbered_addr <= (ptr_t)(&(ohdr -> oh_sz))
+        || ohdr -> oh_string == 0) {
+        GC_err_printf1("<smashed>, appr. sz = %ld)\n",
+        	       (GC_size((ptr_t)ohdr) - DEBUG_BYTES));
+    } else {
+        if (ohdr -> oh_string[0] == '\0') {
+            GC_err_puts("EMPTY(smashed?)");
+        } else {
+            GC_err_puts(ohdr -> oh_string);
+        }
+        GC_err_printf2(":%ld, sz=%ld)\n", (unsigned long)(ohdr -> oh_int),
+        			          (unsigned long)(ohdr -> oh_sz));
+        PRINT_CALL_CHAIN(ohdr);
+    }
+}
+
+void GC_check_heap_proc();
+
+void GC_start_debugging()
+{
+    GC_check_heap = GC_check_heap_proc;
+    GC_print_heap_obj = GC_debug_print_heap_obj_proc;
+    GC_debugging_started = TRUE;
+    GC_register_displacement((word)sizeof(oh));
+}
+
+# if defined(__STDC__) || defined(__cplusplus)
+    void GC_debug_register_displacement(GC_word offset)
+# else
+    void GC_debug_register_displacement(offset) 
+    GC_word offset;
+# endif
+{
+    GC_register_displacement(offset);
+    GC_register_displacement((word)sizeof(oh) + offset);
+}
+
+# ifdef GC_ADD_CALLER
+#   define EXTRA_ARGS word ra, char * s, int i
+#   define OPT_RA ra,
+# else
+#   define EXTRA_ARGS char * s, int i
+#   define OPT_RA
+# endif
+
+# ifdef __STDC__
+    GC_PTR GC_debug_malloc(size_t lb, EXTRA_ARGS)
+# else
+    GC_PTR GC_debug_malloc(lb, s, i)
+    size_t lb;
+    char * s;
+    int i;
+#   ifdef GC_ADD_CALLER
+	--> GC_ADD_CALLER not implemented for K&R C
+#   endif
+# endif
+{
+    GC_PTR result = GC_malloc(lb + DEBUG_BYTES);
+    
+    if (result == 0) {
+        GC_err_printf1("GC_debug_malloc(%ld) returning NIL (",
+        	       (unsigned long) lb);
+        GC_err_puts(s);
+        GC_err_printf1(":%ld)\n", (unsigned long)i);
+        return(0);
+    }
+    if (!GC_debugging_started) {
+    	GC_start_debugging();
+    }
+    ADD_CALL_CHAIN(result, ra);
+    return (GC_store_debug_info(result, (word)lb, s, (word)i));
+}
+
+#ifdef STUBBORN_ALLOC
+# ifdef __STDC__
+    GC_PTR GC_debug_malloc_stubborn(size_t lb, EXTRA_ARGS)
+# else
+    GC_PTR GC_debug_malloc_stubborn(lb, s, i)
+    size_t lb;
+    char * s;
+    int i;
+# endif
+{
+    GC_PTR result = GC_malloc_stubborn(lb + DEBUG_BYTES);
+    
+    if (result == 0) {
+        GC_err_printf1("GC_debug_malloc(%ld) returning NIL (",
+        	       (unsigned long) lb);
+        GC_err_puts(s);
+        GC_err_printf1(":%ld)\n", (unsigned long)i);
+        return(0);
+    }
+    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_debug_change_stubborn(p)
+GC_PTR p;
+{
+    register GC_PTR q = GC_base(p);
+    register hdr * hhdr;
+    
+    if (q == 0) {
+        GC_err_printf1("Bad argument: 0x%lx to GC_debug_change_stubborn\n",
+        	       (unsigned long) p);
+        ABORT("GC_debug_change_stubborn: bad arg");
+    }
+    hhdr = HDR(q);
+    if (hhdr -> hb_obj_kind != STUBBORN) {
+        GC_err_printf1("GC_debug_change_stubborn arg not stubborn: 0x%lx\n",
+        	       (unsigned long) p);
+        ABORT("GC_debug_change_stubborn: arg not stubborn");
+    }
+    GC_change_stubborn(q);
+}
+
+void GC_debug_end_stubborn_change(p)
+GC_PTR p;
+{
+    register GC_PTR q = GC_base(p);
+    register hdr * hhdr;
+    
+    if (q == 0) {
+        GC_err_printf1("Bad argument: 0x%lx to GC_debug_end_stubborn_change\n",
+        	       (unsigned long) p);
+        ABORT("GC_debug_end_stubborn_change: bad arg");
+    }
+    hhdr = HDR(q);
+    if (hhdr -> hb_obj_kind != STUBBORN) {
+        GC_err_printf1("debug_end_stubborn_change arg not stubborn: 0x%lx\n",
+        	       (unsigned long) p);
+        ABORT("GC_debug_end_stubborn_change: arg not stubborn");
+    }
+    GC_end_stubborn_change(q);
+}
+
+#endif /* STUBBORN_ALLOC */
+
+# ifdef __STDC__
+    GC_PTR GC_debug_malloc_atomic(size_t lb, EXTRA_ARGS)
+# else
+    GC_PTR GC_debug_malloc_atomic(lb, s, i)
+    size_t lb;
+    char * s;
+    int i;
+# endif
+{
+    GC_PTR result = GC_malloc_atomic(lb + DEBUG_BYTES);
+    
+    if (result == 0) {
+        GC_err_printf1("GC_debug_malloc_atomic(%ld) returning NIL (",
+        	      (unsigned long) lb);
+        GC_err_puts(s);
+        GC_err_printf1(":%ld)\n", (unsigned long)i);
+        return(0);
+    }
+    if (!GC_debugging_started) {
+        GC_start_debugging();
+    }
+    ADD_CALL_CHAIN(result, ra);
+    return (GC_store_debug_info(result, (word)lb, s, (word)i));
+}
+
+# ifdef __STDC__
+    GC_PTR GC_debug_malloc_uncollectable(size_t lb, EXTRA_ARGS)
+# else
+    GC_PTR GC_debug_malloc_uncollectable(lb, s, i)
+    size_t lb;
+    char * s;
+    int i;
+# endif
+{
+    GC_PTR result = GC_malloc_uncollectable(lb + DEBUG_BYTES);
+    
+    if (result == 0) {
+        GC_err_printf1("GC_debug_malloc_uncollectable(%ld) returning NIL (",
+        	      (unsigned long) lb);
+        GC_err_puts(s);
+        GC_err_printf1(":%ld)\n", (unsigned long)i);
+        return(0);
+    }
+    if (!GC_debugging_started) {
+        GC_start_debugging();
+    }
+    ADD_CALL_CHAIN(result, ra);
+    return (GC_store_debug_info(result, (word)lb, s, (word)i));
+}
+
+#ifdef ATOMIC_UNCOLLECTABLE
+# ifdef __STDC__
+    GC_PTR GC_debug_malloc_atomic_uncollectable(size_t lb, EXTRA_ARGS)
+# else
+    GC_PTR GC_debug_malloc_atomic_uncollectable(lb, s, i)
+    size_t lb;
+    char * s;
+    int i;
+# endif
+{
+    GC_PTR result = GC_malloc_atomic_uncollectable(lb + DEBUG_BYTES);
+    
+    if (result == 0) {
+        GC_err_printf1(
+		"GC_debug_malloc_atomic_uncollectable(%ld) returning NIL (",
+                (unsigned long) lb);
+        GC_err_puts(s);
+        GC_err_printf1(":%ld)\n", (unsigned long)i);
+        return(0);
+    }
+    if (!GC_debugging_started) {
+        GC_start_debugging();
+    }
+    ADD_CALL_CHAIN(result, ra);
+    return (GC_store_debug_info(result, (word)lb, s, (word)i));
+}
+#endif /* ATOMIC_UNCOLLECTABLE */
+
+# ifdef __STDC__
+    void GC_debug_free(GC_PTR p)
+# else
+    void GC_debug_free(p)
+    GC_PTR p;
+# endif
+{
+    register GC_PTR base = GC_base(p);
+    register ptr_t clobbered;
+    
+    if (base == 0) {
+        GC_err_printf1("Attempt to free invalid pointer %lx\n",
+        	       (unsigned long)p);
+        if (p != 0) ABORT("free(invalid pointer)");
+    }
+    if ((ptr_t)p - (ptr_t)base != sizeof(oh)) {
+        GC_err_printf1(
+        	  "GC_debug_free called on pointer %lx wo debugging info\n",
+        	  (unsigned long)p);
+    } else {
+      clobbered = GC_check_annotated_obj((oh *)base);
+      if (clobbered != 0) {
+        if (((oh *)base) -> oh_sz == GC_size(base)) {
+            GC_err_printf0(
+                  "GC_debug_free: found previously deallocated (?) object at ");
+        } else {
+            GC_err_printf0("GC_debug_free: found smashed location at ");
+        }
+        GC_print_smashed_obj(p, clobbered);
+      }
+      /* Invalidate size */
+      ((oh *)base) -> oh_sz = GC_size(base);
+    }
+    if (GC_find_leak) {
+        GC_free(base);
+    } else {
+	register hdr * hhdr = HDR(p);
+	GC_bool uncollectable = FALSE;
+
+        if (hhdr ->  hb_obj_kind == UNCOLLECTABLE) {
+	    uncollectable = TRUE;
+	}
+#	ifdef ATOMIC_UNCOLLECTABLE
+	    if (hhdr ->  hb_obj_kind == AUNCOLLECTABLE) {
+		    uncollectable = TRUE;
+	    }
+#	endif
+	if (uncollectable) GC_free(base);
+    } /* !GC_find_leak */
+}
+
+# ifdef __STDC__
+    GC_PTR GC_debug_realloc(GC_PTR p, size_t lb, EXTRA_ARGS)
+# else
+    GC_PTR GC_debug_realloc(p, lb, s, i)
+    GC_PTR p;
+    size_t lb;
+    char *s;
+    int i;
+# endif
+{
+    register GC_PTR base = GC_base(p);
+    register ptr_t clobbered;
+    register GC_PTR result;
+    register size_t copy_sz = lb;
+    register size_t old_sz;
+    register hdr * hhdr;
+    
+    if (p == 0) return(GC_debug_malloc(lb, OPT_RA s, i));
+    if (base == 0) {
+        GC_err_printf1(
+              "Attempt to reallocate invalid pointer %lx\n", (unsigned long)p);
+        ABORT("realloc(invalid pointer)");
+    }
+    if ((ptr_t)p - (ptr_t)base != sizeof(oh)) {
+        GC_err_printf1(
+        	"GC_debug_realloc called on pointer %lx wo debugging info\n",
+        	(unsigned long)p);
+        return(GC_realloc(p, lb));
+    }
+    hhdr = HDR(base);
+    switch (hhdr -> hb_obj_kind) {
+#    ifdef STUBBORN_ALLOC
+      case STUBBORN:
+        result = GC_debug_malloc_stubborn(lb, OPT_RA s, i);
+        break;
+#    endif
+      case NORMAL:
+        result = GC_debug_malloc(lb, OPT_RA s, i);
+        break;
+      case PTRFREE:
+        result = GC_debug_malloc_atomic(lb, OPT_RA s, i);
+        break;
+      case UNCOLLECTABLE:
+	result = GC_debug_malloc_uncollectable(lb, OPT_RA s, i);
+ 	break;
+#    ifdef ATOMIC_UNCOLLECTABLE
+      case AUNCOLLECTABLE:
+	result = GC_debug_malloc_atomic_uncollectable(lb, OPT_RA s, i);
+	break;
+#    endif
+      default:
+        GC_err_printf0("GC_debug_realloc: encountered bad kind\n");
+        ABORT("bad kind");
+    }
+    clobbered = GC_check_annotated_obj((oh *)base);
+    if (clobbered != 0) {
+        GC_err_printf0("GC_debug_realloc: found smashed location at ");
+        GC_print_smashed_obj(p, clobbered);
+    }
+    old_sz = ((oh *)base) -> oh_sz;
+    if (old_sz < copy_sz) copy_sz = old_sz;
+    if (result == 0) return(0);
+    BCOPY(p, result,  copy_sz);
+    GC_debug_free(p);
+    return(result);
+}
+
+/* Check all marked objects in the given block for validity */
+/*ARGSUSED*/
+void GC_check_heap_block(hbp, dummy)
+register struct hblk *hbp;	/* ptr to current heap block		*/
+word dummy;
+{
+    register struct hblkhdr * hhdr = HDR(hbp);
+    register word sz = hhdr -> hb_sz;
+    register int word_no;
+    register word *p, *plim;
+    
+    p = (word *)(hbp->hb_body);
+    word_no = HDR_WORDS;
+    if (sz > MAXOBJSZ) {
+	plim = p;
+    } else {
+    	plim = (word *)((((word)hbp) + HBLKSIZE) - WORDS_TO_BYTES(sz));
+    }
+    /* go through all words in block */
+	while( p <= plim ) {
+	    if( mark_bit_from_hdr(hhdr, word_no)
+	        && GC_has_debug_info((ptr_t)p)) {
+	        ptr_t clobbered = GC_check_annotated_obj((oh *)p);
+	        
+	        if (clobbered != 0) {
+	            GC_err_printf0(
+	                "GC_check_heap_block: found smashed location at ");
+        	    GC_print_smashed_obj((ptr_t)p, clobbered);
+	        }
+	    }
+	    word_no += sz;
+	    p += sz;
+	}
+}
+
+
+/* This assumes that all accessible objects are marked, and that	*/
+/* I hold the allocation lock.	Normally called by collector.		*/
+void GC_check_heap_proc()
+{
+#   ifndef SMALL_CONFIG
+	if (sizeof(oh) & (2 * sizeof(word) - 1) != 0) {
+	    ABORT("Alignment problem: object header has inappropriate size\n");
+	}
+#   endif
+    GC_apply_to_all_blocks(GC_check_heap_block, (word)0);
+}
+
+struct closure {
+    GC_finalization_proc cl_fn;
+    GC_PTR cl_data;
+};
+
+# ifdef __STDC__
+    void * GC_make_closure(GC_finalization_proc fn, void * data)
+# else
+    GC_PTR GC_make_closure(fn, data)
+    GC_finalization_proc fn;
+    GC_PTR data;
+# endif
+{
+    struct closure * result =
+    		(struct closure *) GC_malloc(sizeof (struct closure));
+    
+    result -> cl_fn = fn;
+    result -> cl_data = data;
+    return((GC_PTR)result);
+}
+
+# ifdef __STDC__
+    void GC_debug_invoke_finalizer(void * obj, void * data)
+# else
+    void GC_debug_invoke_finalizer(obj, data)
+    char * obj;
+    char * data;
+# endif
+{
+    register struct closure * cl = (struct closure *) data;
+    
+    (*(cl -> cl_fn))((GC_PTR)((char *)obj + sizeof(oh)), cl -> cl_data);
+} 
+
+
+# ifdef __STDC__
+    void GC_debug_register_finalizer(GC_PTR obj, GC_finalization_proc fn,
+    				     GC_PTR cd, GC_finalization_proc *ofn,
+				     GC_PTR *ocd)
+# else
+    void GC_debug_register_finalizer(obj, fn, cd, ofn, ocd)
+    GC_PTR obj;
+    GC_finalization_proc fn;
+    GC_PTR cd;
+    GC_finalization_proc *ofn;
+    GC_PTR *ocd;
+# endif
+{
+    ptr_t base = GC_base(obj);
+    if (0 == base || (ptr_t)obj - base != sizeof(oh)) {
+        GC_err_printf1(
+	    "GC_register_finalizer called with non-base-pointer 0x%lx\n",
+	    obj);
+    }
+    GC_register_finalizer(base, GC_debug_invoke_finalizer,
+    			  GC_make_closure(fn,cd), ofn, ocd);
+}
+
+# ifdef __STDC__
+    void GC_debug_register_finalizer_no_order
+    				    (GC_PTR obj, GC_finalization_proc fn,
+    				     GC_PTR cd, GC_finalization_proc *ofn,
+				     GC_PTR *ocd)
+# else
+    void GC_debug_register_finalizer_no_order
+    				    (obj, fn, cd, ofn, ocd)
+    GC_PTR obj;
+    GC_finalization_proc fn;
+    GC_PTR cd;
+    GC_finalization_proc *ofn;
+    GC_PTR *ocd;
+# endif
+{
+    ptr_t base = GC_base(obj);
+    if (0 == base || (ptr_t)obj - base != sizeof(oh)) {
+        GC_err_printf1(
+	  "GC_register_finalizer_no_order called with non-base-pointer 0x%lx\n",
+	  obj);
+    }
+    GC_register_finalizer_no_order(base, GC_debug_invoke_finalizer,
+     			  	      GC_make_closure(fn,cd), ofn, ocd);
+ }
+
+# ifdef __STDC__
+    void GC_debug_register_finalizer_ignore_self
+    				    (GC_PTR obj, GC_finalization_proc fn,
+    				     GC_PTR cd, GC_finalization_proc *ofn,
+				     GC_PTR *ocd)
+# else
+    void GC_debug_register_finalizer_ignore_self
+    				    (obj, fn, cd, ofn, ocd)
+    GC_PTR obj;
+    GC_finalization_proc fn;
+    GC_PTR cd;
+    GC_finalization_proc *ofn;
+    GC_PTR *ocd;
+# endif
+{
+    ptr_t base = GC_base(obj);
+    if (0 == base || (ptr_t)obj - base != sizeof(oh)) {
+        GC_err_printf1(
+	    "GC_register_finalizer_ignore_self called with non-base-pointer 0x%lx\n",
+	    obj);
+    }
+    GC_register_finalizer_ignore_self(base, GC_debug_invoke_finalizer,
+    			  	      GC_make_closure(fn,cd), ofn, ocd);
+}