Tarball conversion

1 files changed, 1185 insertions, 0 deletions

diff --git a/boehm-gc/misc.c b/boehm-gc/misc.c
new file mode 100644
index 0000000000..069c7d57ad
--- /dev/null
+++ b/boehm-gc/misc.c
@@ -0,0 +1,1185 @@
+/* 
+ * Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
+ * Copyright (c) 1991-1994 by Xerox Corporation.  All rights reserved.
+ * Copyright (c) 1999-2001 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 */
+
+
+#include <stdio.h>
+#include <limits.h>
+#ifndef _WIN32_WCE
+#include <signal.h>
+#endif
+
+#define I_HIDE_POINTERS	/* To make GC_call_with_alloc_lock visible */
+#include "private/gc_pmark.h"
+
+#ifdef GC_SOLARIS_THREADS
+# include <sys/syscall.h>
+#endif
+#if defined(MSWIN32) || defined(MSWINCE)
+# define WIN32_LEAN_AND_MEAN
+# define NOSERVICE
+# include <windows.h>
+# include <tchar.h>
+#endif
+
+# ifdef THREADS
+#   ifdef PCR
+#     include "il/PCR_IL.h"
+      PCR_Th_ML GC_allocate_ml;
+#   else
+#     ifdef SRC_M3
+	/* Critical section counter is defined in the M3 runtime 	*/
+	/* That's all we use.						*/
+#     else
+#	ifdef GC_SOLARIS_THREADS
+	  mutex_t GC_allocate_ml;	/* Implicitly initialized.	*/
+#	else
+#          if defined(GC_WIN32_THREADS) 
+#             if defined(GC_PTHREADS)
+		  pthread_mutex_t GC_allocate_ml = PTHREAD_MUTEX_INITIALIZER;
+#	      elif defined(GC_DLL)
+		 __declspec(dllexport) CRITICAL_SECTION GC_allocate_ml;
+#	      else
+		 CRITICAL_SECTION GC_allocate_ml;
+#	      endif
+#          else
+#             if defined(GC_PTHREADS) && !defined(GC_SOLARIS_THREADS)
+#		if defined(USE_SPIN_LOCK)
+	          pthread_t GC_lock_holder = NO_THREAD;
+#	        else
+		  pthread_mutex_t GC_allocate_ml = PTHREAD_MUTEX_INITIALIZER;
+	          pthread_t GC_lock_holder = NO_THREAD;
+			/* Used only for assertions, and to prevent	 */
+			/* recursive reentry in the system call wrapper. */
+#		endif 
+#    	      else
+	          --> declare allocator lock here
+#	      endif
+#	   endif
+#	endif
+#     endif
+#   endif
+# endif
+
+#if defined(NOSYS) || defined(ECOS)
+#undef STACKBASE
+#endif
+
+/* Dont unnecessarily call GC_register_main_static_data() in case 	*/
+/* dyn_load.c isn't linked in.						*/
+#ifdef DYNAMIC_LOADING
+# define GC_REGISTER_MAIN_STATIC_DATA() GC_register_main_static_data()
+#else
+# define GC_REGISTER_MAIN_STATIC_DATA() TRUE
+#endif
+
+GC_FAR struct _GC_arrays GC_arrays /* = { 0 } */;
+
+
+GC_bool GC_debugging_started = FALSE;
+	/* defined here so we don't have to load debug_malloc.o */
+
+void (*GC_check_heap) GC_PROTO((void)) = (void (*) GC_PROTO((void)))0;
+void (*GC_print_all_smashed) GC_PROTO((void)) = (void (*) GC_PROTO((void)))0;
+
+void (*GC_start_call_back) GC_PROTO((void)) = (void (*) GC_PROTO((void)))0;
+
+ptr_t GC_stackbottom = 0;
+
+#ifdef IA64
+  ptr_t GC_register_stackbottom = 0;
+#endif
+
+GC_bool GC_dont_gc = 0;
+
+GC_bool GC_dont_precollect = 0;
+
+GC_bool GC_quiet = 0;
+
+GC_bool GC_print_stats = 0;
+
+GC_bool GC_print_back_height = 0;
+
+#ifndef NO_DEBUGGING
+  GC_bool GC_dump_regularly = 0;  /* Generate regular debugging dumps. */
+#endif
+
+#ifdef KEEP_BACK_PTRS
+  long GC_backtraces = 0;	/* Number of random backtraces to 	*/
+  				/* generate for each GC.		*/
+#endif
+
+#ifdef FIND_LEAK
+  int GC_find_leak = 1;
+#else
+  int GC_find_leak = 0;
+#endif
+
+#ifdef ALL_INTERIOR_POINTERS
+  int GC_all_interior_pointers = 1;
+#else
+  int GC_all_interior_pointers = 0;
+#endif
+
+long GC_large_alloc_warn_interval = 5;
+	/* Interval between unsuppressed warnings.	*/
+
+long GC_large_alloc_warn_suppressed = 0;
+	/* Number of warnings suppressed so far.	*/
+
+/*ARGSUSED*/
+GC_PTR GC_default_oom_fn GC_PROTO((size_t bytes_requested))
+{
+    return(0);
+}
+
+GC_PTR (*GC_oom_fn) GC_PROTO((size_t bytes_requested)) = GC_default_oom_fn;
+
+extern signed_word GC_mem_found;
+
+void * GC_project2(arg1, arg2)
+void *arg1;
+void *arg2;
+{
+  return arg2;
+}
+
+# ifdef MERGE_SIZES
+    /* Set things up so that GC_size_map[i] >= words(i),		*/
+    /* but not too much bigger						*/
+    /* and so that size_map contains relatively few distinct entries 	*/
+    /* This is stolen from Russ Atkinson's Cedar quantization		*/
+    /* alogrithm (but we precompute it).				*/
+
+
+    void GC_init_size_map()
+    {
+	register unsigned i;
+
+	/* Map size 0 to something bigger.			*/
+	/* This avoids problems at lower levels.		*/
+	/* One word objects don't have to be 2 word aligned,	*/
+	/* unless we're using mark bytes.	   		*/
+	  for (i = 0; i < sizeof(word); i++) {
+	      GC_size_map[i] = MIN_WORDS;
+	  }
+#	  if MIN_WORDS > 1
+	    GC_size_map[sizeof(word)] = MIN_WORDS;
+#	  else
+	    GC_size_map[sizeof(word)] = ROUNDED_UP_WORDS(sizeof(word));
+#	  endif
+	for (i = sizeof(word) + 1; i <= 8 * sizeof(word); i++) {
+	    GC_size_map[i] = ALIGNED_WORDS(i);
+	}
+	for (i = 8*sizeof(word) + 1; i <= 16 * sizeof(word); i++) {
+	      GC_size_map[i] = (ROUNDED_UP_WORDS(i) + 1) & (~1);
+	}
+#	ifdef GC_GCJ_SUPPORT
+	   /* Make all sizes up to 32 words predictable, so that a 	*/
+	   /* compiler can statically perform the same computation,	*/
+	   /* or at least a computation that results in similar size	*/
+	   /* classes.							*/
+	   for (i = 16*sizeof(word) + 1; i <= 32 * sizeof(word); i++) {
+	      GC_size_map[i] = (ROUNDED_UP_WORDS(i) + 3) & (~3);
+	   }
+#	endif
+	/* We leave the rest of the array to be filled in on demand. */
+    }
+    
+    /* Fill in additional entries in GC_size_map, including the ith one */
+    /* We assume the ith entry is currently 0.				*/
+    /* Note that a filled in section of the array ending at n always    */
+    /* has length at least n/4.						*/
+    void GC_extend_size_map(i)
+    word i;
+    {
+        word orig_word_sz = ROUNDED_UP_WORDS(i);
+        word word_sz = orig_word_sz;
+    	register word byte_sz = WORDS_TO_BYTES(word_sz);
+    				/* The size we try to preserve.		*/
+    				/* Close to to i, unless this would	*/
+    				/* introduce too many distinct sizes.	*/
+    	word smaller_than_i = byte_sz - (byte_sz >> 3);
+    	word much_smaller_than_i = byte_sz - (byte_sz >> 2);
+    	register word low_limit;	/* The lowest indexed entry we 	*/
+    					/* initialize.			*/
+    	register word j;
+    	
+    	if (GC_size_map[smaller_than_i] == 0) {
+    	    low_limit = much_smaller_than_i;
+    	    while (GC_size_map[low_limit] != 0) low_limit++;
+    	} else {
+    	    low_limit = smaller_than_i + 1;
+    	    while (GC_size_map[low_limit] != 0) low_limit++;
+    	    word_sz = ROUNDED_UP_WORDS(low_limit);
+    	    word_sz += word_sz >> 3;
+    	    if (word_sz < orig_word_sz) word_sz = orig_word_sz;
+    	}
+#	ifdef ALIGN_DOUBLE
+	    word_sz += 1;
+	    word_sz &= ~1;
+#	endif
+	if (word_sz > MAXOBJSZ) {
+	    word_sz = MAXOBJSZ;
+	}
+	/* If we can fit the same number of larger objects in a block,	*/
+	/* do so.							*/ 
+	{
+	    size_t number_of_objs = BODY_SZ/word_sz;
+	    word_sz = BODY_SZ/number_of_objs;
+#	    ifdef ALIGN_DOUBLE
+		word_sz &= ~1;
+#	    endif
+	}
+    	byte_sz = WORDS_TO_BYTES(word_sz);
+	if (GC_all_interior_pointers) {
+	    /* We need one extra byte; don't fill in GC_size_map[byte_sz] */
+	    byte_sz -= EXTRA_BYTES;
+	}
+
+    	for (j = low_limit; j <= byte_sz; j++) GC_size_map[j] = word_sz;  
+    }
+# endif
+
+
+/*
+ * The following is a gross hack to deal with a problem that can occur
+ * on machines that are sloppy about stack frame sizes, notably SPARC.
+ * Bogus pointers may be written to the stack and not cleared for
+ * a LONG time, because they always fall into holes in stack frames
+ * that are not written.  We partially address this by clearing
+ * sections of the stack whenever we get control.
+ */
+word GC_stack_last_cleared = 0;	/* GC_no when we last did this */
+# ifdef THREADS
+#   define BIG_CLEAR_SIZE 2048	/* Clear this much now and then.	*/
+#   define SMALL_CLEAR_SIZE 256 /* Clear this much every time.		*/
+# endif
+# define CLEAR_SIZE 213  /* Granularity for GC_clear_stack_inner */
+# define DEGRADE_RATE 50
+
+word GC_min_sp;		/* Coolest stack pointer value from which we've */
+			/* already cleared the stack.			*/
+			
+word GC_high_water;
+			/* "hottest" stack pointer value we have seen	*/
+			/* recently.  Degrades over time.		*/
+
+word GC_words_allocd_at_reset;
+
+#if defined(ASM_CLEAR_CODE)
+  extern ptr_t GC_clear_stack_inner();
+#else  
+/* Clear the stack up to about limit.  Return arg. */
+/*ARGSUSED*/
+ptr_t GC_clear_stack_inner(arg, limit)
+ptr_t arg;
+word limit;
+{
+    word dummy[CLEAR_SIZE];
+    
+    BZERO(dummy, CLEAR_SIZE*sizeof(word));
+    if ((word)(dummy) COOLER_THAN limit) {
+        (void) GC_clear_stack_inner(arg, limit);
+    }
+    /* Make sure the recursive call is not a tail call, and the bzero	*/
+    /* call is not recognized as dead code.				*/
+    GC_noop1((word)dummy);
+    return(arg);
+}
+#endif
+
+/* Clear some of the inaccessible part of the stack.  Returns its	*/
+/* argument, so it can be used in a tail call position, hence clearing  */
+/* another frame.							*/
+ptr_t GC_clear_stack(arg)
+ptr_t arg;
+{
+    register word sp = (word)GC_approx_sp();  /* Hotter than actual sp */
+#   ifdef THREADS
+        word dummy[SMALL_CLEAR_SIZE];
+	static unsigned random_no = 0;
+       			 	 /* Should be more random than it is ... */
+				 /* Used to occasionally clear a bigger	 */
+				 /* chunk.				 */
+#   endif
+    register word limit;
+    
+#   define SLOP 400
+	/* Extra bytes we clear every time.  This clears our own	*/
+	/* activation record, and should cause more frequent		*/
+	/* clearing near the cold end of the stack, a good thing.	*/
+#   define GC_SLOP 4000
+	/* We make GC_high_water this much hotter than we really saw   	*/
+	/* saw it, to cover for GC noise etc. above our current frame.	*/
+#   define CLEAR_THRESHOLD 100000
+	/* We restart the clearing process after this many bytes of	*/
+	/* allocation.  Otherwise very heavily recursive programs	*/
+	/* with sparse stacks may result in heaps that grow almost	*/
+	/* without bounds.  As the heap gets larger, collection 	*/
+	/* frequency decreases, thus clearing frequency would decrease, */
+	/* thus more junk remains accessible, thus the heap gets	*/
+	/* larger ...							*/
+# ifdef THREADS
+    if (++random_no % 13 == 0) {
+	limit = sp;
+	MAKE_HOTTER(limit, BIG_CLEAR_SIZE*sizeof(word));
+        limit &= ~0xf;	/* Make it sufficiently aligned for assembly	*/
+        		/* implementations of GC_clear_stack_inner.	*/
+	return GC_clear_stack_inner(arg, limit);
+    } else {
+	BZERO(dummy, SMALL_CLEAR_SIZE*sizeof(word));
+	return arg;
+    }
+# else
+    if (GC_gc_no > GC_stack_last_cleared) {
+        /* Start things over, so we clear the entire stack again */
+        if (GC_stack_last_cleared == 0) GC_high_water = (word) GC_stackbottom;
+        GC_min_sp = GC_high_water;
+        GC_stack_last_cleared = GC_gc_no;
+        GC_words_allocd_at_reset = GC_words_allocd;
+    }
+    /* Adjust GC_high_water */
+        MAKE_COOLER(GC_high_water, WORDS_TO_BYTES(DEGRADE_RATE) + GC_SLOP);
+        if (sp HOTTER_THAN GC_high_water) {
+            GC_high_water = sp;
+        }
+        MAKE_HOTTER(GC_high_water, GC_SLOP);
+    limit = GC_min_sp;
+    MAKE_HOTTER(limit, SLOP);
+    if (sp COOLER_THAN limit) {
+        limit &= ~0xf;	/* Make it sufficiently aligned for assembly	*/
+        		/* implementations of GC_clear_stack_inner.	*/
+        GC_min_sp = sp;
+        return(GC_clear_stack_inner(arg, limit));
+    } else if (WORDS_TO_BYTES(GC_words_allocd - GC_words_allocd_at_reset)
+    	       > CLEAR_THRESHOLD) {
+    	/* Restart clearing process, but limit how much clearing we do. */
+    	GC_min_sp = sp;
+    	MAKE_HOTTER(GC_min_sp, CLEAR_THRESHOLD/4);
+    	if (GC_min_sp HOTTER_THAN GC_high_water) GC_min_sp = GC_high_water;
+    	GC_words_allocd_at_reset = GC_words_allocd;
+    }  
+    return(arg);
+# endif
+}
+
+
+/* Return a pointer to the base address of p, given a pointer to a	*/
+/* an address within an object.  Return 0 o.w.				*/
+# ifdef __STDC__
+    GC_PTR GC_base(GC_PTR p)
+# else
+    GC_PTR GC_base(p)
+    GC_PTR p;
+# endif
+{
+    register word r;
+    register struct hblk *h;
+    register bottom_index *bi;
+    register hdr *candidate_hdr;
+    register word limit;
+    
+    r = (word)p;
+    if (!GC_is_initialized) return 0;
+    h = HBLKPTR(r);
+    GET_BI(r, bi);
+    candidate_hdr = HDR_FROM_BI(bi, r);
+    if (candidate_hdr == 0) return(0);
+    /* If it's a pointer to the middle of a large object, move it	*/
+    /* to the beginning.						*/
+	while (IS_FORWARDING_ADDR_OR_NIL(candidate_hdr)) {
+	   h = FORWARDED_ADDR(h,candidate_hdr);
+	   r = (word)h;
+	   candidate_hdr = HDR(h);
+	}
+    if (candidate_hdr -> hb_map == GC_invalid_map) return(0);
+    /* Make sure r points to the beginning of the object */
+	r &= ~(WORDS_TO_BYTES(1) - 1);
+        {
+	    register int offset = HBLKDISPL(r);
+	    register signed_word sz = candidate_hdr -> hb_sz;
+	    register signed_word map_entry;
+	      
+	    map_entry = MAP_ENTRY((candidate_hdr -> hb_map), offset);
+	    if (map_entry > CPP_MAX_OFFSET) {
+            	map_entry = (signed_word)(BYTES_TO_WORDS(offset)) % sz;
+            }
+            r -= WORDS_TO_BYTES(map_entry);
+            limit = r + WORDS_TO_BYTES(sz);
+	    if (limit > (word)(h + 1)
+	        && sz <= BYTES_TO_WORDS(HBLKSIZE)) {
+	        return(0);
+	    }
+	    if ((word)p >= limit) return(0);
+	}
+    return((GC_PTR)r);
+}
+
+
+/* Return the size of an object, given a pointer to its base.		*/
+/* (For small obects this also happens to work from interior pointers,	*/
+/* but that shouldn't be relied upon.)					*/
+# ifdef __STDC__
+    size_t GC_size(GC_PTR p)
+# else
+    size_t GC_size(p)
+    GC_PTR p;
+# endif
+{
+    register int sz;
+    register hdr * hhdr = HDR(p);
+    
+    sz = WORDS_TO_BYTES(hhdr -> hb_sz);
+    return(sz);
+}
+
+size_t GC_get_heap_size GC_PROTO(())
+{
+    return ((size_t) GC_heapsize);
+}
+
+size_t GC_get_free_bytes GC_PROTO(())
+{
+    return ((size_t) GC_large_free_bytes);
+}
+
+size_t GC_get_bytes_since_gc GC_PROTO(())
+{
+    return ((size_t) WORDS_TO_BYTES(GC_words_allocd));
+}
+
+size_t GC_get_total_bytes GC_PROTO(())
+{
+    return ((size_t) WORDS_TO_BYTES(GC_words_allocd+GC_words_allocd_before_gc));
+}
+
+GC_bool GC_is_initialized = FALSE;
+
+void GC_init()
+{
+    DCL_LOCK_STATE;
+    
+    DISABLE_SIGNALS();
+
+#if defined(GC_WIN32_THREADS) && !defined(GC_PTHREADS)
+    if (!GC_is_initialized) {
+      BOOL (WINAPI *pfn) (LPCRITICAL_SECTION, DWORD) = NULL;
+      HMODULE hK32 = GetModuleHandle("kernel32.dll");
+      if (hK32)
+	  pfn = (BOOL (WINAPI *) (LPCRITICAL_SECTION, DWORD))
+		GetProcAddress (hK32,
+				"InitializeCriticalSectionAndSpinCount");
+      if (pfn)
+          pfn(&GC_allocate_ml, 4000);
+      else
+	  InitializeCriticalSection (&GC_allocate_ml);
+    }
+#endif /* MSWIN32 */
+
+    LOCK();
+    GC_init_inner();
+    UNLOCK();
+    ENABLE_SIGNALS();
+
+#   if defined(PARALLEL_MARK) || defined(THREAD_LOCAL_ALLOC)
+	/* Make sure marker threads and started and thread local */
+	/* allocation is initialized, in case we didn't get 	 */
+	/* called from GC_init_parallel();			 */
+        {
+	  extern void GC_init_parallel(void);
+	  GC_init_parallel();
+	}
+#   endif /* PARALLEL_MARK || THREAD_LOCAL_ALLOC */
+
+#   if defined(DYNAMIC_LOADING) && defined(DARWIN)
+    {
+        /* This must be called WITHOUT the allocation lock held
+        and before any threads are created */
+        extern void GC_init_dyld();
+        GC_init_dyld();
+    }
+#   endif
+}
+
+#if defined(MSWIN32) || defined(MSWINCE)
+    CRITICAL_SECTION GC_write_cs;
+#endif
+
+#ifdef MSWIN32
+    extern void GC_init_win32 GC_PROTO((void));
+#endif
+
+extern void GC_setpagesize();
+
+
+#ifdef MSWIN32
+extern GC_bool GC_no_win32_dlls;
+#else
+# define GC_no_win32_dlls FALSE
+#endif
+
+void GC_exit_check GC_PROTO((void))
+{
+   GC_gcollect();
+}
+
+#ifdef SEARCH_FOR_DATA_START
+  extern void GC_init_linux_data_start GC_PROTO((void));
+#endif
+
+#ifdef UNIX_LIKE
+
+extern void GC_set_and_save_fault_handler GC_PROTO((void (*handler)(int)));
+
+static void looping_handler(sig)
+int sig;
+{
+    GC_err_printf1("Caught signal %d: looping in handler\n", sig);
+    for(;;);
+}
+
+static GC_bool installed_looping_handler = FALSE;
+
+static void maybe_install_looping_handler()
+{
+    /* Install looping handler before the write fault handler, so we	*/
+    /* handle write faults correctly.					*/
+      if (!installed_looping_handler && 0 != GETENV("GC_LOOP_ON_ABORT")) {
+        GC_set_and_save_fault_handler(looping_handler);
+        installed_looping_handler = TRUE;
+      }
+}
+
+#else /* !UNIX_LIKE */
+
+# define maybe_install_looping_handler()
+
+#endif
+
+void GC_init_inner()
+{
+#   if !defined(THREADS) && defined(GC_ASSERTIONS)
+        word dummy;
+#   endif
+    word initial_heap_sz = (word)MINHINCR;
+    
+    if (GC_is_initialized) return;
+#   ifdef PRINTSTATS
+      GC_print_stats = 1;
+#   endif
+#   if defined(MSWIN32) || defined(MSWINCE)
+      InitializeCriticalSection(&GC_write_cs);
+#   endif
+    if (0 != GETENV("GC_PRINT_STATS")) {
+      GC_print_stats = 1;
+    } 
+#   ifndef NO_DEBUGGING
+      if (0 != GETENV("GC_DUMP_REGULARLY")) {
+        GC_dump_regularly = 1;
+      }
+#   endif
+#   ifdef KEEP_BACK_PTRS
+      {
+        char * backtraces_string = GETENV("GC_BACKTRACES");
+        if (0 != backtraces_string) {
+          GC_backtraces = atol(backtraces_string);
+	  if (backtraces_string[0] == '\0') GC_backtraces = 1;
+        }
+      }
+#   endif
+    if (0 != GETENV("GC_FIND_LEAK")) {
+      GC_find_leak = 1;
+#     ifdef __STDC__
+        atexit(GC_exit_check);
+#     endif
+    }
+    if (0 != GETENV("GC_ALL_INTERIOR_POINTERS")) {
+      GC_all_interior_pointers = 1;
+    }
+    if (0 != GETENV("GC_DONT_GC")) {
+      GC_dont_gc = 1;
+    }
+    if (0 != GETENV("GC_PRINT_BACK_HEIGHT")) {
+      GC_print_back_height = 1;
+    }
+    if (0 != GETENV("GC_NO_BLACKLIST_WARNING")) {
+      GC_large_alloc_warn_interval = LONG_MAX;
+    }
+    {
+      char * time_limit_string = GETENV("GC_PAUSE_TIME_TARGET");
+      if (0 != time_limit_string) {
+        long time_limit = atol(time_limit_string);
+        if (time_limit < 5) {
+	  WARN("GC_PAUSE_TIME_TARGET environment variable value too small "
+	       "or bad syntax: Ignoring\n", 0);
+        } else {
+	  GC_time_limit = time_limit;
+        }
+      }
+    }
+    {
+      char * interval_string = GETENV("GC_LARGE_ALLOC_WARN_INTERVAL");
+      if (0 != interval_string) {
+        long interval = atol(interval_string);
+        if (interval <= 0) {
+	  WARN("GC_LARGE_ALLOC_WARN_INTERVAL environment variable has "
+	       "bad value: Ignoring\n", 0);
+        } else {
+	  GC_large_alloc_warn_interval = interval;
+        }
+      }
+    }
+    maybe_install_looping_handler();
+    /* Adjust normal object descriptor for extra allocation.	*/
+    if (ALIGNMENT > GC_DS_TAGS && EXTRA_BYTES != 0) {
+      GC_obj_kinds[NORMAL].ok_descriptor = ((word)(-ALIGNMENT) | GC_DS_LENGTH);
+    }
+    GC_setpagesize();
+    GC_exclude_static_roots(beginGC_arrays, endGC_arrays);
+    GC_exclude_static_roots(beginGC_obj_kinds, endGC_obj_kinds);
+#   ifdef SEPARATE_GLOBALS
+      GC_exclude_static_roots(beginGC_objfreelist, endGC_objfreelist);
+      GC_exclude_static_roots(beginGC_aobjfreelist, endGC_aobjfreelist);
+#   endif
+#   ifdef MSWIN32
+ 	GC_init_win32();
+#   endif
+#   if defined(SEARCH_FOR_DATA_START)
+	GC_init_linux_data_start();
+#   endif
+#   if (defined(NETBSD) || defined(OPENBSD)) && defined(__ELF__)
+	GC_init_netbsd_elf();
+#   endif
+#   if defined(GC_PTHREADS) || defined(GC_SOLARIS_THREADS) \
+       || defined(GC_WIN32_THREADS)
+        GC_thr_init();
+#   endif
+#   ifdef GC_SOLARIS_THREADS
+	/* We need dirty bits in order to find live stack sections.	*/
+        GC_dirty_init();
+#   endif
+#   if !defined(THREADS) || defined(GC_PTHREADS) || defined(GC_WIN32_THREADS) \
+	|| defined(GC_SOLARIS_THREADS)
+      if (GC_stackbottom == 0) {
+        # if defined(GC_PTHREADS) && ! defined(GC_SOLARIS_THREADS)
+	/* Use thread_stack_base if available, as GC could be initialized from
+	   a thread that is not the "main" thread.  */
+	GC_stackbottom = GC_get_thread_stack_base();
+	# endif
+	if (GC_stackbottom == 0)
+	  GC_stackbottom = GC_get_stack_base();
+#       if (defined(LINUX) || defined(HPUX)) && defined(IA64)
+	  GC_register_stackbottom = GC_get_register_stack_base();
+#       endif
+      } else {
+#       if (defined(LINUX) || defined(HPUX)) && defined(IA64)
+	  if (GC_register_stackbottom == 0) {
+	    WARN("GC_register_stackbottom should be set with GC_stackbottom", 0);
+	    /* The following may fail, since we may rely on	 	*/
+	    /* alignment properties that may not hold with a user set	*/
+	    /* GC_stackbottom.						*/
+	    GC_register_stackbottom = GC_get_register_stack_base();
+	  }
+#	endif
+      }
+#   endif
+    GC_STATIC_ASSERT(sizeof (ptr_t) == sizeof(word));
+    GC_STATIC_ASSERT(sizeof (signed_word) == sizeof(word));
+    GC_STATIC_ASSERT(sizeof (struct hblk) == HBLKSIZE);
+#   ifndef THREADS
+#     if defined(STACK_GROWS_UP) && defined(STACK_GROWS_DOWN)
+  	ABORT(
+  	  "Only one of STACK_GROWS_UP and STACK_GROWS_DOWN should be defd\n");
+#     endif
+#     if !defined(STACK_GROWS_UP) && !defined(STACK_GROWS_DOWN)
+  	ABORT(
+  	  "One of STACK_GROWS_UP and STACK_GROWS_DOWN should be defd\n");
+#     endif
+#     ifdef STACK_GROWS_DOWN
+        GC_ASSERT((word)(&dummy) <= (word)GC_stackbottom);
+#     else
+        GC_ASSERT((word)(&dummy) >= (word)GC_stackbottom);
+#     endif
+#   endif
+#   if !defined(_AUX_SOURCE) || defined(__GNUC__)
+      GC_ASSERT((word)(-1) > (word)0);
+      /* word should be unsigned */
+#   endif
+    GC_ASSERT((signed_word)(-1) < (signed_word)0);
+    
+    /* Add initial guess of root sets.  Do this first, since sbrk(0)	*/
+    /* might be used.							*/
+      if (GC_REGISTER_MAIN_STATIC_DATA()) GC_register_data_segments();
+    GC_init_headers();
+    GC_bl_init();
+    GC_mark_init();
+    {
+	char * sz_str = GETENV("GC_INITIAL_HEAP_SIZE");
+	if (sz_str != NULL) {
+	  initial_heap_sz = atoi(sz_str);
+	  if (initial_heap_sz <= MINHINCR * HBLKSIZE) {
+	    WARN("Bad initial heap size %s - ignoring it.\n",
+		 sz_str);
+	  } 
+	  initial_heap_sz = divHBLKSZ(initial_heap_sz);
+	}
+    }
+    {
+	char * sz_str = GETENV("GC_MAXIMUM_HEAP_SIZE");
+	if (sz_str != NULL) {
+	  word max_heap_sz = (word)atol(sz_str);
+	  if (max_heap_sz < initial_heap_sz * HBLKSIZE) {
+	    WARN("Bad maximum heap size %s - ignoring it.\n",
+		 sz_str);
+	  } 
+	  if (0 == GC_max_retries) GC_max_retries = 2;
+	  GC_set_max_heap_size(max_heap_sz);
+	}
+    }
+    if (!GC_expand_hp_inner(initial_heap_sz)) {
+        GC_err_printf0("Can't start up: not enough memory\n");
+        EXIT();
+    }
+    /* Preallocate large object map.  It's otherwise inconvenient to 	*/
+    /* deal with failure.						*/
+      if (!GC_add_map_entry((word)0)) {
+        GC_err_printf0("Can't start up: not enough memory\n");
+        EXIT();
+      }
+    GC_register_displacement_inner(0L);
+#   ifdef MERGE_SIZES
+      GC_init_size_map();
+#   endif
+#   ifdef PCR
+      if (PCR_IL_Lock(PCR_Bool_false, PCR_allSigsBlocked, PCR_waitForever)
+          != PCR_ERes_okay) {
+          ABORT("Can't lock load state\n");
+      } else if (PCR_IL_Unlock() != PCR_ERes_okay) {
+          ABORT("Can't unlock load state\n");
+      }
+      PCR_IL_Unlock();
+      GC_pcr_install();
+#   endif
+#   if !defined(SMALL_CONFIG)
+      if (!GC_no_win32_dlls && 0 != GETENV("GC_ENABLE_INCREMENTAL")) {
+	GC_ASSERT(!GC_incremental);
+        GC_setpagesize();
+#       ifndef GC_SOLARIS_THREADS
+          GC_dirty_init();
+#       endif
+        GC_ASSERT(GC_words_allocd == 0)
+    	GC_incremental = TRUE;
+      }
+#   endif /* !SMALL_CONFIG */
+    COND_DUMP;
+    /* Get black list set up and/or incremental GC started */
+      if (!GC_dont_precollect || GC_incremental) GC_gcollect_inner();
+    GC_is_initialized = TRUE;
+#   ifdef STUBBORN_ALLOC
+    	GC_stubborn_init();
+#   endif
+    /* Convince lint that some things are used */
+#   ifdef LINT
+      {
+          extern char * GC_copyright[];
+          extern int GC_read();
+          extern void GC_register_finalizer_no_order();
+          
+          GC_noop(GC_copyright, GC_find_header,
+                  GC_push_one, GC_call_with_alloc_lock, GC_read,
+                  GC_dont_expand,
+#		  ifndef NO_DEBUGGING
+		    GC_dump,
+#		  endif
+                  GC_register_finalizer_no_order);
+      }
+#   endif
+}
+
+void GC_enable_incremental GC_PROTO(())
+{
+# if !defined(SMALL_CONFIG) && !defined(KEEP_BACK_PTRS)
+  /* If we are keeping back pointers, the GC itself dirties all	*/
+  /* pages on which objects have been marked, making 		*/
+  /* incremental GC pointless.					*/
+  if (!GC_find_leak) {
+    DCL_LOCK_STATE;
+    
+    DISABLE_SIGNALS();
+    LOCK();
+    if (GC_incremental) goto out;
+    GC_setpagesize();
+    if (GC_no_win32_dlls) goto out;
+#   ifndef GC_SOLARIS_THREADS 
+      maybe_install_looping_handler();  /* Before write fault handler! */
+      GC_dirty_init();
+#   endif
+    if (!GC_is_initialized) {
+        GC_init_inner();
+    }
+    if (GC_incremental) goto out;
+    if (GC_dont_gc) {
+        /* Can't easily do it. */
+        UNLOCK();
+    	ENABLE_SIGNALS();
+    	return;
+    }
+    if (GC_words_allocd > 0) {
+    	/* There may be unmarked reachable objects	*/
+    	GC_gcollect_inner();
+    }   /* else we're OK in assuming everything's	*/
+    	/* clean since nothing can point to an	  	*/
+    	/* unmarked object.			  	*/
+    GC_read_dirty();
+    GC_incremental = TRUE;
+out:
+    UNLOCK();
+    ENABLE_SIGNALS();
+  }
+# endif
+}
+
+
+#if defined(MSWIN32) || defined(MSWINCE)
+# define LOG_FILE _T("gc.log")
+
+  HANDLE GC_stdout = 0;
+
+  void GC_deinit()
+  {
+      if (GC_is_initialized) {
+  	DeleteCriticalSection(&GC_write_cs);
+      }
+  }
+
+  int GC_write(buf, len)
+  GC_CONST char * buf;
+  size_t len;
+  {
+      BOOL tmp;
+      DWORD written;
+      if (len == 0)
+	  return 0;
+      EnterCriticalSection(&GC_write_cs);
+      if (GC_stdout == INVALID_HANDLE_VALUE) {
+	  return -1;
+      } else if (GC_stdout == 0) {
+	  GC_stdout = CreateFile(LOG_FILE, GENERIC_WRITE,
+        			 FILE_SHARE_READ | FILE_SHARE_WRITE,
+        			 NULL, CREATE_ALWAYS, FILE_FLAG_WRITE_THROUGH,
+        			 NULL); 
+    	  if (GC_stdout == INVALID_HANDLE_VALUE) ABORT("Open of log file failed");
+      }
+      tmp = WriteFile(GC_stdout, buf, len, &written, NULL);
+      if (!tmp)
+	  DebugBreak();
+      LeaveCriticalSection(&GC_write_cs);
+      return tmp ? (int)written : -1;
+  }
+
+#endif
+
+#if defined(OS2) || defined(MACOS)
+FILE * GC_stdout = NULL;
+FILE * GC_stderr = NULL;
+int GC_tmp;  /* Should really be local ... */
+
+  void GC_set_files()
+  {
+      if (GC_stdout == NULL) {
+	GC_stdout = stdout;
+    }
+    if (GC_stderr == NULL) {
+	GC_stderr = stderr;
+    }
+  }
+#endif
+
+#if !defined(OS2) && !defined(MACOS) && !defined(MSWIN32) && !defined(MSWINCE)
+  int GC_stdout = 1;
+  int GC_stderr = 2;
+# if !defined(AMIGA)
+#   include <unistd.h>
+# endif
+#endif
+
+#if !defined(MSWIN32) && !defined(MSWINCE) && !defined(OS2) \
+    && !defined(MACOS)  && !defined(ECOS) && !defined(NOSYS)
+int GC_write(fd, buf, len)
+int fd;
+GC_CONST char *buf;
+size_t len;
+{
+     register int bytes_written = 0;
+     register int result;
+     
+     while (bytes_written < len) {
+#	ifdef GC_SOLARIS_THREADS
+	    result = syscall(SYS_write, fd, buf + bytes_written,
+	    			  	    len - bytes_written);
+#	else
+     	    result = write(fd, buf + bytes_written, len - bytes_written);
+#	endif
+	if (-1 == result) return(result);
+	bytes_written += result;
+    }
+    return(bytes_written);
+}
+#endif /* UN*X */
+
+#ifdef ECOS
+int GC_write(fd, buf, len)
+{
+  _Jv_diag_write (buf, len);
+  return len;
+}
+#endif
+
+#ifdef NOSYS
+int GC_write(fd, buf, len)
+{
+  /* No writing.  */
+  return len;
+}
+#endif
+
+
+#if defined(MSWIN32) || defined(MSWINCE)
+#   define WRITE(f, buf, len) GC_write(buf, len)
+#else
+#   if defined(OS2) || defined(MACOS)
+#   define WRITE(f, buf, len) (GC_set_files(), \
+			       GC_tmp = fwrite((buf), 1, (len), (f)), \
+			       fflush(f), GC_tmp)
+#   else
+#     define WRITE(f, buf, len) GC_write((f), (buf), (len))
+#   endif
+#endif
+
+/* A version of printf that is unlikely to call malloc, and is thus safer */
+/* to call from the collector in case malloc has been bound to GC_malloc. */
+/* Assumes that no more than 1023 characters are written at once.	  */
+/* Assumes that all arguments have been converted to something of the	  */
+/* same size as long, and that the format conversions expect something	  */
+/* of that size.							  */
+void GC_printf(format, a, b, c, d, e, f)
+GC_CONST char * format;
+long a, b, c, d, e, f;
+{
+    char buf[1025];
+    
+    if (GC_quiet) return;
+    buf[1024] = 0x15;
+    (void) sprintf(buf, format, a, b, c, d, e, f);
+    if (buf[1024] != 0x15) ABORT("GC_printf clobbered stack");
+    if (WRITE(GC_stdout, buf, strlen(buf)) < 0) ABORT("write to stdout failed");
+}
+
+void GC_err_printf(format, a, b, c, d, e, f)
+GC_CONST char * format;
+long a, b, c, d, e, f;
+{
+    char buf[1025];
+    
+    buf[1024] = 0x15;
+    (void) sprintf(buf, format, a, b, c, d, e, f);
+    if (buf[1024] != 0x15) ABORT("GC_err_printf clobbered stack");
+    if (WRITE(GC_stderr, buf, strlen(buf)) < 0) ABORT("write to stderr failed");
+}
+
+void GC_err_puts(s)
+GC_CONST char *s;
+{
+    if (WRITE(GC_stderr, s, strlen(s)) < 0) ABORT("write to stderr failed");
+}
+
+#if defined(LINUX) && !defined(SMALL_CONFIG)
+void GC_err_write(buf, len)
+GC_CONST char *buf;
+size_t len;
+{
+    if (WRITE(GC_stderr, buf, len) < 0) ABORT("write to stderr failed");
+}
+#endif
+
+# if defined(__STDC__) || defined(__cplusplus)
+    void GC_default_warn_proc(char *msg, GC_word arg)
+# else
+    void GC_default_warn_proc(msg, arg)
+    char *msg;
+    GC_word arg;
+# endif
+{
+    GC_err_printf1(msg, (unsigned long)arg);
+}
+
+GC_warn_proc GC_current_warn_proc = GC_default_warn_proc;
+
+# if defined(__STDC__) || defined(__cplusplus)
+    GC_warn_proc GC_set_warn_proc(GC_warn_proc p)
+# else
+    GC_warn_proc GC_set_warn_proc(p)
+    GC_warn_proc p;
+# endif
+{
+    GC_warn_proc result;
+
+#   ifdef GC_WIN32_THREADS
+      GC_ASSERT(GC_is_initialized);
+#   endif
+    LOCK();
+    result = GC_current_warn_proc;
+    GC_current_warn_proc = p;
+    UNLOCK();
+    return(result);
+}
+
+# if defined(__STDC__) || defined(__cplusplus)
+    GC_word GC_set_free_space_divisor (GC_word value)
+# else
+    GC_word GC_set_free_space_divisor (value)
+    GC_word value;
+# endif
+{
+    GC_word old = GC_free_space_divisor;
+    GC_free_space_divisor = value;
+    return old;
+}
+
+#ifndef PCR
+void GC_abort(msg)
+GC_CONST char * msg;
+{
+#   if defined(MSWIN32)
+      (void) MessageBoxA(NULL, msg, "Fatal error in gc", MB_ICONERROR|MB_OK);
+#   else
+      GC_err_printf1("%s\n", msg);
+#   endif
+    if (GETENV("GC_LOOP_ON_ABORT") != NULL) {
+	    /* In many cases it's easier to debug a running process.	*/
+	    /* It's arguably nicer to sleep, but that makes it harder	*/
+	    /* to look at the thread if the debugger doesn't know much	*/
+	    /* about threads.						*/
+	    for(;;) {}
+    }
+#   if defined(MSWIN32) || defined(MSWINCE)
+	DebugBreak();
+#   else
+        (void) abort();
+#   endif
+}
+#endif
+
+void GC_enable()
+{
+    LOCK();
+    GC_dont_gc--;
+    UNLOCK();
+}
+
+void GC_disable()
+{
+    LOCK();
+    GC_dont_gc++;
+    UNLOCK();
+}
+
+/* Helper procedures for new kind creation.	*/
+void ** GC_new_free_list_inner()
+{
+    void *result = GC_INTERNAL_MALLOC((MAXOBJSZ+1)*sizeof(ptr_t), PTRFREE);
+    if (result == 0) ABORT("Failed to allocate freelist for new kind");
+    BZERO(result, (MAXOBJSZ+1)*sizeof(ptr_t));
+    return result;
+}
+
+void ** GC_new_free_list()
+{
+    void *result;
+    LOCK(); DISABLE_SIGNALS();
+    result = GC_new_free_list_inner();
+    UNLOCK(); ENABLE_SIGNALS();
+    return result;
+}
+
+int GC_new_kind_inner(fl, descr, adjust, clear)
+void **fl;
+GC_word descr;
+int adjust;
+int clear;
+{
+    int result = GC_n_kinds++;
+
+    if (GC_n_kinds > MAXOBJKINDS) ABORT("Too many kinds");
+    GC_obj_kinds[result].ok_freelist = (ptr_t *)fl;
+    GC_obj_kinds[result].ok_reclaim_list = 0;
+    GC_obj_kinds[result].ok_descriptor = descr;
+    GC_obj_kinds[result].ok_relocate_descr = adjust;
+    GC_obj_kinds[result].ok_init = clear;
+    return result;
+}
+
+int GC_new_kind(fl, descr, adjust, clear)
+void **fl;
+GC_word descr;
+int adjust;
+int clear;
+{
+    int result;
+    LOCK(); DISABLE_SIGNALS();
+    result = GC_new_kind_inner(fl, descr, adjust, clear);
+    UNLOCK(); ENABLE_SIGNALS();
+    return result;
+}
+
+int GC_new_proc_inner(proc)
+GC_mark_proc proc;
+{
+    int result = GC_n_mark_procs++;
+
+    if (GC_n_mark_procs > MAX_MARK_PROCS) ABORT("Too many mark procedures");
+    GC_mark_procs[result] = proc;
+    return result;
+}
+
+int GC_new_proc(proc)
+GC_mark_proc proc;
+{
+    int result;
+    LOCK(); DISABLE_SIGNALS();
+    result = GC_new_proc_inner(proc);
+    UNLOCK(); ENABLE_SIGNALS();
+    return result;
+}
+
+
+#if !defined(NO_DEBUGGING)
+
+void GC_dump()
+{
+    GC_printf0("***Static roots:\n");
+    GC_print_static_roots();
+    GC_printf0("\n***Heap sections:\n");
+    GC_print_heap_sects();
+    GC_printf0("\n***Free blocks:\n");
+    GC_print_hblkfreelist();
+    GC_printf0("\n***Blocks in use:\n");
+    GC_print_block_list();
+    GC_printf0("\n***Finalization statistics:\n");
+    GC_print_finalization_stats();
+}
+
+#endif /* NO_DEBUGGING */