X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Frts%2FPrinter.c;h=ec4acdc0de939afc1c186239d4fd14c787a44694;hb=6f83fbc0a8b201a3d2ad20e4d8c707613d45cf2a;hp=3b0ccc645210a5b233db26edb247ee02222f022b;hpb=c5a9b776f363a0cdc02dff3c2c475771f5adda52;p=ghc-hetmet.git

diff --git a/ghc/rts/Printer.c b/ghc/rts/Printer.c
index 3b0ccc6..ec4acdc 100644
--- a/ghc/rts/Printer.c
+++ b/ghc/rts/Printer.c
@@ -1,24 +1,32 @@
-/* -*- mode: hugs-c; -*- */
 /* -----------------------------------------------------------------------------
- * $Id: Printer.c,v 1.4 1999/01/18 15:21:38 simonm Exp $
+ * $Id: Printer.c,v 1.40 2001/04/03 10:09:23 rrt Exp $
  *
- * Copyright (c) 1994-1998.
+ * (c) The GHC Team, 1994-2000.
  *
  * Heap printer
  * 
  * ---------------------------------------------------------------------------*/
 
 #include "Rts.h"
+#include "Printer.h"
 
 #ifdef DEBUG
 
 #include "RtsUtils.h"
 #include "RtsFlags.h"
+#include "MBlock.h"
+#include "Storage.h"
 #include "Bytecodes.h"  /* for InstrPtr */
 #include "Disassembler.h"
 
 #include "Printer.h"
 
+#if defined(GRAN) || defined(PAR)
+// HWL: explicit fixed header size to make debugging easier
+int fixed_hs = FIXED_HS, itbl_sz = sizeofW(StgInfoTable), 
+    uf_sz=sizeofW(StgUpdateFrame), sf_sz=sizeofW(StgSeqFrame); 
+#endif
+
 /* --------------------------------------------------------------------------
  * local function decls
  * ------------------------------------------------------------------------*/
@@ -39,15 +47,11 @@ static void    printZcoded   ( const char *raw );
  * Printer
  * ------------------------------------------------------------------------*/
 
-extern void printPtr( StgPtr p )
+void printPtr( StgPtr p )
 {
     const char *raw;
     if (lookupGHCName( p, &raw )) {
         printZcoded(raw);
-#ifdef INTERPRETER
-    } else if ((raw = lookupHugsName(p)) != 0) {
-        fprintf(stderr, "%s", raw);
-#endif
     } else {
         fprintf(stderr, "%p", p);
     }
@@ -64,28 +68,33 @@ static void printStdObject( StgClosure *obj, char* tag )
     StgWord i, j;
     const StgInfoTable* info = get_itbl(obj);
     fprintf(stderr,"%s(",tag);
-    printPtr((StgPtr)info);
+    printPtr((StgPtr)obj->header.info);
+#ifdef PROFILING
+    fprintf(stderr,", %s", obj->header.prof.ccs->cc->label);
+#endif
     for (i = 0; i < info->layout.payload.ptrs; ++i) {
         fprintf(stderr,", ");
-        printPtr(payloadPtr(obj,i));
+        printPtr((StgPtr)obj->payload[i]);
     }
     for (j = 0; j < info->layout.payload.nptrs; ++j) {
-        fprintf(stderr,", %xd#",payloadWord(obj,i+j));
+        fprintf(stderr,", %pd#",obj->payload[i+j]);
     }
     fprintf(stderr,")\n");
 }
 
 void printClosure( StgClosure *obj )
 {
-    switch ( get_itbl(obj)->type ) {
+    StgInfoTable *info;
+    
+    info = get_itbl(obj);
+
+    switch ( info->type ) {
     case INVALID_OBJECT:
             barf("Invalid object");
-#ifdef INTERPRETER
     case BCO:
-            fprintf(stderr,"BCO\n");
-            disassemble(stgCast(StgBCO*,obj),"\t");
+            disassemble( (StgBCO*)obj );
             break;
-#endif
+
     case AP_UPD:
         {
 	    StgAP_UPD* ap = stgCast(StgAP_UPD*,obj);
@@ -93,66 +102,114 @@ void printClosure( StgClosure *obj )
             fprintf(stderr,"AP_UPD("); printPtr((StgPtr)ap->fun);
             for (i = 0; i < ap->n_args; ++i) {
                 fprintf(stderr,", ");
-                printPtr(payloadPtr(ap,i));
+                printPtr((P_)ap->payload[i]);
             }
             fprintf(stderr,")\n");
             break;
         }
+
     case PAP:
         {
 	    StgPAP* pap = stgCast(StgPAP*,obj);
             StgWord i;
-            fprintf(stderr,"AP_NUPD("); printPtr((StgPtr)pap->fun);
+            fprintf(stderr,"PAP("); printPtr((StgPtr)pap->fun);
             for (i = 0; i < pap->n_args; ++i) {
                 fprintf(stderr,", ");
-                printPtr(payloadPtr(pap,i));
+                printPtr((StgPtr)pap->payload[i]);
             }
             fprintf(stderr,")\n");
             break;
         }
+
     case IND:
             fprintf(stderr,"IND("); 
             printPtr((StgPtr)stgCast(StgInd*,obj)->indirectee);
             fprintf(stderr,")\n"); 
             break;
-    case CAF_UNENTERED:
-        {
-	    StgCAF* caf = stgCast(StgCAF*,obj);
-            fprintf(stderr,"CAF_UNENTERED("); 
-            printPtr((StgPtr)caf->body);
-            fprintf(stderr,", ");
-            printPtr((StgPtr)caf->value); /* should be null */
-            fprintf(stderr,", ");
-            printPtr((StgPtr)caf->link);  /* should be null */
+
+    case IND_STATIC:
+            fprintf(stderr,"IND_STATIC("); 
+            printPtr((StgPtr)stgCast(StgInd*,obj)->indirectee);
             fprintf(stderr,")\n"); 
             break;
-        }
-    case CAF_ENTERED:
-        {
-	    StgCAF* caf = stgCast(StgCAF*,obj);
-            fprintf(stderr,"CAF_ENTERED("); 
-            printPtr((StgPtr)caf->body);
-            fprintf(stderr,", ");
-            printPtr((StgPtr)caf->value);
-            fprintf(stderr,", ");
-            printPtr((StgPtr)caf->link);
+
+    case IND_OLDGEN:
+            fprintf(stderr,"IND_OLDGEN("); 
+            printPtr((StgPtr)stgCast(StgInd*,obj)->indirectee);
             fprintf(stderr,")\n"); 
             break;
-        }
+
     case CAF_BLACKHOLE:
             fprintf(stderr,"CAF_BH("); 
             printPtr((StgPtr)stgCast(StgBlockingQueue*,obj)->blocking_queue);
             fprintf(stderr,")\n"); 
             break;
+
+    case SE_BLACKHOLE:
+            fprintf(stderr,"SE_BH\n"); 
+            break;
+
+    case SE_CAF_BLACKHOLE:
+            fprintf(stderr,"SE_CAF_BH\n"); 
+            break;
+
     case BLACKHOLE:
             fprintf(stderr,"BH\n"); 
             break;
+
     case BLACKHOLE_BQ:
             fprintf(stderr,"BQ("); 
             printPtr((StgPtr)stgCast(StgBlockingQueue*,obj)->blocking_queue);
             fprintf(stderr,")\n"); 
             break;
+
+    case TSO:
+      fprintf(stderr,"TSO("); 
+      fprintf(stderr,"%d (%p)",((StgTSO*)obj)->id, (StgTSO*)obj);
+      fprintf(stderr,")\n"); 
+      break;
+
+#if defined(PAR)
+    case BLOCKED_FETCH:
+      fprintf(stderr,"BLOCKED_FETCH("); 
+      printGA(&(stgCast(StgBlockedFetch*,obj)->ga));
+      printPtr((StgPtr)(stgCast(StgBlockedFetch*,obj)->node));
+      fprintf(stderr,")\n"); 
+      break;
+
+    case FETCH_ME:
+      fprintf(stderr,"FETCH_ME("); 
+      printGA((globalAddr *)stgCast(StgFetchMe*,obj)->ga);
+      fprintf(stderr,")\n"); 
+      break;
+
+#ifdef DIST      
+    case REMOTE_REF:
+      fprintf(stderr,"REMOTE_REF("); 
+      printGA((globalAddr *)stgCast(StgFetchMe*,obj)->ga);
+      fprintf(stderr,")\n"); 
+      break;
+#endif
+  
+    case FETCH_ME_BQ:
+      fprintf(stderr,"FETCH_ME_BQ("); 
+      // printGA((globalAddr *)stgCast(StgFetchMe*,obj)->ga);
+      printPtr((StgPtr)stgCast(StgFetchMeBlockingQueue*,obj)->blocking_queue);
+      fprintf(stderr,")\n"); 
+      break;
+#endif
+#if defined(GRAN) || defined(PAR)
+    case RBH:
+      fprintf(stderr,"RBH("); 
+      printPtr((StgPtr)stgCast(StgRBH*,obj)->blocking_queue);
+      fprintf(stderr,")\n"); 
+      break;
+
+#endif
+
     case CONSTR:
+    case CONSTR_1_0: case CONSTR_0_1:
+    case CONSTR_1_1: case CONSTR_0_2: case CONSTR_2_0:
     case CONSTR_INTLIKE:
     case CONSTR_CHARLIKE:
     case CONSTR_STATIC:
@@ -162,42 +219,79 @@ void printClosure( StgClosure *obj )
              * tag as well.
 	     */
             StgWord i, j;
-            const StgInfoTable* info = get_itbl(obj);
-            fprintf(stderr,"PACK(");
-            printPtr((StgPtr)info);
+#ifdef PROFILING
+	    fprintf(stderr,"%s(", info->prof.closure_desc);
+	    fprintf(stderr,"%s", obj->header.prof.ccs->cc->label);
+#else
+            fprintf(stderr,"CONSTR(");
+            printPtr((StgPtr)obj->header.info);
             fprintf(stderr,"(tag=%d)",info->srt_len);
+#endif
             for (i = 0; i < info->layout.payload.ptrs; ++i) {
-                fprintf(stderr,", ");
-                printPtr(payloadPtr(obj,i));
+		fprintf(stderr,", ");
+                printPtr((StgPtr)obj->payload[i]);
             }
             for (j = 0; j < info->layout.payload.nptrs; ++j) {
-                fprintf(stderr,", %x#",payloadWord(obj,i+j));
+                fprintf(stderr,", %p#", obj->payload[i+j]);
             }
             fprintf(stderr,")\n");
             break;
         }
+
+#ifdef XMLAMBDA
+/* rows are mutarrays in xmlambda, maybe we should make a new type: ROW */
+    case MUT_ARR_PTRS_FROZEN:
+          {
+            StgWord i;
+            StgMutArrPtrs* p = stgCast(StgMutArrPtrs*,obj);
+
+            fprintf(stderr,"Row<%i>(",p->ptrs);
+            for (i = 0; i < p->ptrs; ++i) {
+                if (i > 0) fprintf(stderr,", ");
+                printPtr((StgPtr)(p->payload[i]));
+            }
+            fprintf(stderr,")\n");
+            break;
+          }
+#endif  
+
     case FUN:
+    case FUN_1_0: case FUN_0_1: 
+    case FUN_1_1: case FUN_0_2: case FUN_2_0:
     case FUN_STATIC:
             printStdObject(obj,"FUN");
             break;
+
     case THUNK:
+    case THUNK_1_0: case THUNK_0_1:
+    case THUNK_1_1: case THUNK_0_2: case THUNK_2_0:
     case THUNK_STATIC:
             /* ToDo: will this work for THUNK_STATIC too? */
+#ifdef PROFILING
+	    printStdObject(obj,info->prof.closure_desc);
+#else
             printStdObject(obj,"THUNK");
+#endif
             break;
-#if 0
+
+    case THUNK_SELECTOR:
+            printStdObject(obj,"THUNK_SELECTOR");
+            break;
+
     case ARR_WORDS:
         {
             StgWord i;
             fprintf(stderr,"ARR_WORDS(\"");
-            /* ToDo: we can't safely assume that this is a string! */
+            /* ToDo: we can't safely assume that this is a string! 
             for (i = 0; arrWordsGetChar(obj,i); ++i) {
                 putchar(arrWordsGetChar(obj,i));
-            }
+		} */
+	    for (i=0; i<((StgArrWords *)obj)->words; i++)
+	      fprintf(stderr, "%d", ((StgArrWords *)obj)->payload[i]);
             fprintf(stderr,"\")\n");
             break;
         }
-#endif
+
     case UPDATE_FRAME:
         {
             StgUpdateFrame* u = stgCast(StgUpdateFrame*,obj);
@@ -210,6 +304,7 @@ void printClosure( StgClosure *obj )
             fprintf(stderr,")\n"); 
             break;
         }
+
     case CATCH_FRAME:
         {
             StgCatchFrame* u = stgCast(StgCatchFrame*,obj);
@@ -222,6 +317,7 @@ void printClosure( StgClosure *obj )
             fprintf(stderr,")\n"); 
             break;
         }
+
     case SEQ_FRAME:
         {
             StgSeqFrame* u = stgCast(StgSeqFrame*,obj);
@@ -232,6 +328,7 @@ void printClosure( StgClosure *obj )
             fprintf(stderr,")\n"); 
             break;
         }
+
     case STOP_FRAME:
         {
             StgStopFrame* u = stgCast(StgStopFrame*,obj);
@@ -241,66 +338,59 @@ void printClosure( StgClosure *obj )
             break;
         }
     default:
-            barf("printClosure %d",get_itbl(obj)->type);
+            //barf("printClosure %d",get_itbl(obj)->type);
+            fprintf(stderr, "*** printClosure: unknown type %d ****\n",
+                    get_itbl(obj)->type );
             return;
     }
 }
 
+/*
+void printGraph( StgClosure *obj )
+{
+ printClosure(obj);
+}
+*/
+
 StgPtr printStackObj( StgPtr sp )
 {
     /*fprintf(stderr,"Stack[%d] = ", &stgStack[STACK_SIZE] - sp); */
 
     if (IS_ARG_TAG(*sp)) {
-
-#ifdef DEBUG_EXTRA
-        StackTag tag = (StackTag)*sp;
-        switch ( tag ) {
-        case ILLEGAL_TAG:
-                barf("printStackObj: ILLEGAL_TAG");
-                break;
-        case REALWORLD_TAG:
-                fprintf(stderr,"RealWorld#\n");
-                break;
-        case INT_TAG:
-                fprintf(stderr,"Int# %d\n", *(StgInt*)(sp+1));
-                break;
-        case INT64_TAG:
-                fprintf(stderr,"Int64# %lld\n", *(StgInt64*)(sp+1));
-                break;
-        case WORD_TAG:
-                fprintf(stderr,"Word# %d\n", *(StgWord*)(sp+1));
-                break;
-        case ADDR_TAG:
-                fprintf(stderr,"Addr# "); printPtr(*(StgAddr*)(sp+1)); fprintf(stderr,"\n");
-                break;
-        case CHAR_TAG:
-                fprintf(stderr,"Char# %d\n", *(StgChar*)(sp+1));
-                break;
-        case FLOAT_TAG:
-                fprintf(stderr,"Float# %f\n", PK_FLT(sp+1));
-                break;
-        case DOUBLE_TAG:
-                fprintf(stderr,"Double# %f\n", PK_DBL(sp+1));
-                break;
-        default:
-                barf("printStackObj: unrecognised ARGTAG %d",tag);
+        nat i;
+        StgWord tag = *sp++;
+        fprintf(stderr,"Tagged{");
+        for (i = 0; i < tag; i++) {
+            fprintf(stderr,"0x%x#", (unsigned)(*sp++));
+            if (i < tag-1) fprintf(stderr, ", ");
         }
-        sp += 1 + ARG_SIZE(tag);
-
-#else /* !DEBUG_EXTRA */
-	{
-	    StgWord tag = *sp++;
-	    nat i;
-	    fprintf(stderr,"Tag: %d words\n", tag);
-	    for (i = 0; i < tag; i++) {
-	        fprintf(stderr,"Word# %d\n", *sp++);
-	    }
-	}
-#endif
-
+        fprintf(stderr, "}\n");
     } else {
+        StgClosure* c = (StgClosure*)(*sp);
         printPtr((StgPtr)*sp);
-        fprintf(stderr,"\n");
+        if (c == (StgClosure*)&stg_ctoi_ret_R1p_info) {
+           fprintf(stderr, "\t\t\tstg_ctoi_ret_R1p_info\n" );
+	} else
+        if (c == (StgClosure*)&stg_ctoi_ret_R1n_info) {
+           fprintf(stderr, "\t\t\tstg_ctoi_ret_R1n_info\n" );
+	} else
+        if (c == (StgClosure*)&stg_ctoi_ret_F1_info) {
+           fprintf(stderr, "\t\t\tstg_ctoi_ret_F1_info\n" );
+	} else
+        if (c == (StgClosure*)&stg_ctoi_ret_D1_info) {
+           fprintf(stderr, "\t\t\tstg_ctoi_ret_D1_info\n" );
+	} else
+        if (c == (StgClosure*)&stg_ctoi_ret_V_info) {
+           fprintf(stderr, "\t\t\tstg_ctoi_ret_V_info\n" );
+	} else
+        if (get_itbl(c)->type == BCO) {
+           fprintf(stderr, "\t\t\t");
+           fprintf(stderr, "BCO(...)\n"); 
+        }
+        else {
+           fprintf(stderr, "\t\t\t");
+           printClosure ( (StgClosure*)(*sp));
+        }
         sp += 1;
     }
     return sp;
@@ -309,7 +399,7 @@ StgPtr printStackObj( StgPtr sp )
 
 void printStackChunk( StgPtr sp, StgPtr spBottom )
 {
-    StgNat32 bitmap;
+    StgWord32 bitmap;
     const StgInfoTable *info;
 
     ASSERT(sp <= spBottom);
@@ -352,7 +442,7 @@ void printStackChunk( StgPtr sp, StgPtr spBottom )
 	  sp++;
 	small_bitmap:
 	  while (bitmap != 0) {
-	    fprintf(stderr,"Stack[%d] (%p) = ", spBottom-sp, sp);
+	    fprintf(stderr,"   stk[%d] (%p) = ", spBottom-sp, sp);
 	    if ((bitmap & 1) == 0) {
 	      printPtr((P_)*sp);
 	      fprintf(stderr,"\n");
@@ -417,6 +507,94 @@ void printTSO( StgTSO *tso )
     /* printStackChunk( tso->sp, tso->stack+tso->stack_size); */
 }
 
+/* -----------------------------------------------------------------------------
+   Closure types
+   
+   NOTE: must be kept in sync with the closure types in includes/ClosureTypes.h
+   -------------------------------------------------------------------------- */
+
+static char *closure_type_names[] = {
+  "INVALID_OBJECT",          	/* 0  */
+  "CONSTR",                  	/* 1  */
+  "CONSTR_1_0",			/* 2  */
+  "CONSTR_0_1",			/* 3  */
+  "CONSTR_2_0",			/* 4  */
+  "CONSTR_1_1",			/* 5  */
+  "CONSTR_0_2",			/* 6  */
+  "CONSTR_INTLIKE",	        /* 7  */
+  "CONSTR_CHARLIKE",	        /* 8  */
+  "CONSTR_STATIC",	        /* 9  */
+  "CONSTR_NOCAF_STATIC",     	/* 10 */
+  "FUN",		        /* 11 */
+  "FUN_1_0",		  	/* 12 */
+  "FUN_0_1",		  	/* 13 */
+  "FUN_2_0",		  	/* 14 */
+  "FUN_1_1",		  	/* 15 */
+  "FUN_0_2",			/* 16 */
+  "FUN_STATIC",	        	/* 17 */
+  "THUNK",		        /* 18 */
+  "THUNK_1_0",	  		/* 19 */
+  "THUNK_0_1",	  		/* 20 */
+  "THUNK_2_0",	  		/* 21 */
+  "THUNK_1_1",	  		/* 22 */
+  "THUNK_0_2",			/* 23 */
+  "THUNK_STATIC",	        /* 24 */
+  "THUNK_SELECTOR",	        /* 25 */
+  "BCO",		        /* 26 */
+  "AP_UPD",		        /* 27 */
+  "PAP",			/* 28 */
+  "IND",		        /* 29 */
+  "IND_OLDGEN",	        	/* 30 */
+  "IND_PERM",	        	/* 31 */
+  "IND_OLDGEN_PERM",	        /* 32 */
+  "IND_STATIC",	        	/* 33 */
+  "CAF_BLACKHOLE",		/* 36 */
+  "RET_BCO",                 	/* 37 */
+  "RET_SMALL",	        	/* 38 */
+  "RET_VEC_SMALL",	        /* 39 */
+  "RET_BIG",		        /* 40 */
+  "RET_VEC_BIG",	        /* 41 */
+  "RET_DYN",		        /* 42 */
+  "UPDATE_FRAME",	        /* 43 */
+  "CATCH_FRAME",	        /* 44 */
+  "STOP_FRAME",	        	/* 45 */
+  "SEQ_FRAME",	        	/* 46 */
+  "BLACKHOLE",	        	/* 47 */
+  "BLACKHOLE_BQ",	        /* 48 */
+  "SE_BLACKHOLE",		/* 49 */
+  "SE_CAF_BLACKHOLE",		/* 50 */
+  "MVAR",		        /* 51 */
+  "ARR_WORDS",	        	/* 52 */
+  "MUT_ARR_PTRS",	        /* 53 */
+  "MUT_ARR_PTRS_FROZEN",     	/* 54 */
+  "MUT_VAR",		        /* 55 */
+  "WEAK",		        /* 56 */
+  "FOREIGN",		        /* 57 */
+  "STABLE_NAME",	        /* 58 */
+  "TSO",		        /* 59 */
+  "BLOCKED_FETCH",	        /* 60 */
+  "FETCH_ME",                   /* 61 */
+  "FETCH_ME_BQ",                /* 62 */
+  "RBH",                        /* 63 */
+  "EVACUATED",                  /* 64 */
+  "REMOTE_REF",                 /* 65 */
+  "N_CLOSURE_TYPES"         	/* 66 */
+};
+
+char *
+info_type(StgClosure *closure){ 
+  return closure_type_names[get_itbl(closure)->type];
+}
+
+char *
+info_type_by_ip(StgInfoTable *ip){ 
+  return closure_type_names[ip->type];
+}
+
+void
+info_hdr_type(StgClosure *closure, char *res){ 
+  strcpy(res,closure_type_names[get_itbl(closure)->type]);
+}
 
 /* --------------------------------------------------------------------------
  * Address printing code
@@ -637,7 +815,10 @@ static void printZcoded( const char *raw )
  * Symbol table loading
  * ------------------------------------------------------------------------*/
 
-#ifdef HAVE_BFD_H
+/* Causing linking trouble on Win32 plats, so I'm
+   disabling this for now. 
+*/
+#if defined(HAVE_BFD_H) && !defined(_WIN32) && !defined(PAR) && !defined(GRAN)
 
 #include <bfd.h>
 
@@ -656,6 +837,7 @@ static rtsBool isReal( flagword flags, const char *name )
         return rtsFalse;
     }
 #else
+    (void)flags;   /* keep gcc -Wall happy */
     if (*name == '\0'  || 
 	(name[0] == 'g' && name[1] == 'c' && name[2] == 'c') ||
 	(name[0] == 'c' && name[1] == 'c' && name[2] == '.')) {
@@ -735,11 +917,65 @@ extern void DEBUG_LoadSymbols( char *name )
 
 #else /* HAVE_BFD_H */
 
-extern void DEBUG_LoadSymbols( char *name )
+extern void DEBUG_LoadSymbols( char *name STG_UNUSED )
 {
   /* nothing, yet */
 }
 
 #endif /* HAVE_BFD_H */
 
+#include "StoragePriv.h"
+
+void findPtr(P_ p, int);		/* keep gcc -Wall happy */
+
+void
+findPtr(P_ p, int follow)
+{
+  nat s, g;
+  P_ q, r;
+  bdescr *bd;
+  const int arr_size = 1024;
+  StgPtr arr[arr_size];
+  int i = 0;
+
+  for (g = 0; g < RtsFlags.GcFlags.generations; g++) {
+      for (s = 0; s < generations[g].n_steps; s++) {
+	  if (RtsFlags.GcFlags.generations == 1) {
+	      bd = generations[g].steps[s].to_space;
+	  } else {
+	      bd = generations[g].steps[s].blocks;
+	  }
+	  for (; bd; bd = bd->link) {
+	      for (q = bd->start; q < bd->free; q++) {
+		  if (*q == (W_)p) {
+		      if (i < arr_size) {
+			  r = q;
+			  while (!LOOKS_LIKE_GHC_INFO(*r)) { r--; };
+			  fprintf(stderr, "%p = ", r);
+			  printClosure((StgClosure *)r);
+			  arr[i++] = r;
+		      } else {
+			  return;
+		      }
+		  }
+	      }
+	  }
+      }
+  }
+  if (follow && i == 1) {
+      fprintf(stderr, "-->\n");
+      findPtr(arr[0], 1);
+  }
+}
+
+#else /* DEBUG */
+void printPtr( StgPtr p )
+{
+    fprintf(stderr, "ptr 0x%p (enable -DDEBUG for more info) " , p );
+}
+  
+void printObj( StgClosure *obj )
+{
+    fprintf(stderr, "obj 0x%p (enable -DDEBUG for more info) " , obj );
+}
 #endif /* DEBUG */