cbits/HeapView.c

   1 #include "Rts.h"
   2
   3 StgWord closureSize(StgClosure *closure) {
   4     ASSERT(LOOKS_LIKE_CLOSURE_PTR(closure));
   5     return closure_sizeW(closure);
   6 }
   7
   8 static void
   9 closure_ptrs_in_large_bitmap(StgClosure *ptrs[], StgWord *nptrs, StgClosure **p, StgLargeBitmap *large_bitmap, nat size )
  10 {
  11     nat i, j, b;
  12     StgWord bitmap;
  13
  14     b = 0;
  15
  16     for (i = 0; i < size; b++) {
  17         bitmap = large_bitmap->bitmap[b];
  18         j = stg_min(size-i, BITS_IN(W_));
  19         i += j;
  20         for (; j > 0; j--, p++) {
  21             if ((bitmap & 1) == 0) {
  22                 ptrs[(*nptrs)++] = *p;
  23             }
  24             bitmap = bitmap >> 1;
  25         }
  26     }
  27 }
  28
  29 // from rts/Printer.c
  30 char *closure_type_names[] = {
  31  [INVALID_OBJECT]        = "INVALID_OBJECT",
  32  [CONSTR]                = "CONSTR",
  33  [CONSTR_1_0]            = "CONSTR_1_0",
  34  [CONSTR_0_1]            = "CONSTR_0_1",
  35  [CONSTR_2_0]            = "CONSTR_2_0",
  36  [CONSTR_1_1]            = "CONSTR_1_1",
  37  [CONSTR_0_2]            = "CONSTR_0_2",
  38  [CONSTR_STATIC]         = "CONSTR_STATIC",
  39  [CONSTR_NOCAF_STATIC]   = "CONSTR_NOCAF_STATIC",
  40  [FUN]                   = "FUN",
  41  [FUN_1_0]               = "FUN_1_0",
  42  [FUN_0_1]               = "FUN_0_1",
  43  [FUN_2_0]               = "FUN_2_0",
  44  [FUN_1_1]               = "FUN_1_1",
  45  [FUN_0_2]               = "FUN_0_2",
  46  [FUN_STATIC]            = "FUN_STATIC",
  47  [THUNK]                 = "THUNK",
  48  [THUNK_1_0]             = "THUNK_1_0",
  49  [THUNK_0_1]             = "THUNK_0_1",
  50  [THUNK_2_0]             = "THUNK_2_0",
  51  [THUNK_1_1]             = "THUNK_1_1",
  52  [THUNK_0_2]             = "THUNK_0_2",
  53  [THUNK_STATIC]          = "THUNK_STATIC",
  54  [THUNK_SELECTOR]        = "THUNK_SELECTOR",
  55  [BCO]                   = "BCO",
  56  [AP]                    = "AP",
  57  [PAP]                   = "PAP",
  58  [AP_STACK]              = "AP_STACK",
  59  [IND]                   = "IND",
  60  [IND_PERM]              = "IND_PERM",
  61  [IND_STATIC]            = "IND_STATIC",
  62  [RET_BCO]               = "RET_BCO",
  63  [RET_SMALL]             = "RET_SMALL",
  64  [RET_BIG]               = "RET_BIG",
  65  [RET_DYN]               = "RET_DYN",
  66  [RET_FUN]               = "RET_FUN",
  67  [UPDATE_FRAME]          = "UPDATE_FRAME",
  68  [CATCH_FRAME]           = "CATCH_FRAME",
  69  [UNDERFLOW_FRAME]       = "UNDERFLOW_FRAME",
  70  [STOP_FRAME]            = "STOP_FRAME",
  71  [BLACKHOLE]             = "BLACKHOLE",
  72  [BLOCKING_QUEUE]        = "BLOCKING_QUEUE",
  73  [MVAR_CLEAN]            = "MVAR_CLEAN",
  74  [MVAR_DIRTY]            = "MVAR_DIRTY",
  75  [ARR_WORDS]             = "ARR_WORDS",
  76  [MUT_ARR_PTRS_CLEAN]    = "MUT_ARR_PTRS_CLEAN",
  77  [MUT_ARR_PTRS_DIRTY]    = "MUT_ARR_PTRS_DIRTY",
  78  [MUT_ARR_PTRS_FROZEN0]  = "MUT_ARR_PTRS_FROZEN0",
  79  [MUT_ARR_PTRS_FROZEN]   = "MUT_ARR_PTRS_FROZEN",
  80  [MUT_VAR_CLEAN]         = "MUT_VAR_CLEAN",
  81  [MUT_VAR_DIRTY]         = "MUT_VAR_DIRTY",
  82  [WEAK]                  = "WEAK",
  83  [PRIM]                  = "PRIM",
  84  [MUT_PRIM]              = "MUT_PRIM",
  85  [TSO]                   = "TSO",
  86  [STACK]                 = "STACK",
  87  [TREC_CHUNK]            = "TREC_CHUNK",
  88  [ATOMICALLY_FRAME]      = "ATOMICALLY_FRAME",
  89  [CATCH_RETRY_FRAME]     = "CATCH_RETRY_FRAME",
  90  [CATCH_STM_FRAME]       = "CATCH_STM_FRAME",
  91  [WHITEHOLE]             = "WHITEHOLE"
  92 };
  93
  94
  95 void closure_ptrs_in_pap_payload(StgClosure *ptrs[], StgWord *nptrs, StgClosure *fun, StgClosure **payload, StgWord size) {
  96     StgWord bitmap;
  97     StgFunInfoTable *fun_info;
  98
  99     fun_info = get_fun_itbl(UNTAG_CLOSURE(fun));
 100     ASSERT(fun_info->i.type != PAP);
 101     StgClosure **p = payload;
 102
 103     switch (fun_info->f.fun_type) {
 104     case ARG_GEN:
 105         bitmap = BITMAP_BITS(fun_info->f.b.bitmap);
 106         goto small_bitmap;
 107     case ARG_GEN_BIG:
 108         closure_ptrs_in_large_bitmap(ptrs, nptrs, payload, GET_FUN_LARGE_BITMAP(fun_info), size);
 109         break;
 110     case ARG_BCO:
 111         closure_ptrs_in_large_bitmap(ptrs, nptrs, payload, BCO_BITMAP(fun), size);
 112         break;
 113     default:
 114         bitmap = BITMAP_BITS(stg_arg_bitmaps[fun_info->f.fun_type]);
 115     small_bitmap:
 116         while (size > 0) {
 117             if ((bitmap & 1) == 0) {
 118                 ptrs[(*nptrs)++] = *p;
 119             }
 120             bitmap = bitmap >> 1;
 121             p++;
 122             size--;
 123         }
 124         break;
 125     }
 126 }
 127
 128 StgMutArrPtrs *closurePtrs(Capability *cap, StgClosure *closure) {
 129     ASSERT(LOOKS_LIKE_CLOSURE_PTR(closure));
 130
 131     StgWord size = closureSize(closure);
 132     StgWord nptrs = 0;
 133     StgWord i;
 134
 135     // First collect all pointers here, with the comfortable memory bound
 136     // of the whole closure. Afterwards we know how many pointers are in
 137     // the closure and then we can allocate space on the heap and copy them
 138     // there
 139     StgClosure *ptrs[size];
 140
 141     StgClosure **end;
 142     StgClosure **ptr;
 143
 144     StgInfoTable *info = get_itbl(closure);
 145     StgThunkInfoTable *thunk_info;
 146     StgFunInfoTable *fun_info;
 147
 148     switch (info->type) {
 149         case INVALID_OBJECT:
 150             barf("Invalid Object");
 151             break;
 152
 153         // No pointers
 154         case ARR_WORDS:
 155             break;
 156
 157         // Default layout
 158         case CONSTR_1_0:
 159         case CONSTR_0_1:
 160         case CONSTR_2_0:
 161         case CONSTR_1_1:
 162         case CONSTR_0_2:
 163         case CONSTR:
 164         case CONSTR_STATIC:
 165         case CONSTR_NOCAF_STATIC:
 166         case PRIM:
 167
 168         case FUN:
 169         case FUN_1_0:
 170         case FUN_0_1:
 171         case FUN_1_1:
 172         case FUN_2_0:
 173         case FUN_0_2:
 174         case FUN_STATIC:
 175             end = closure->payload + info->layout.payload.ptrs;
 176             for (ptr = closure->payload; ptr < end; ptr++) {
 177                 ptrs[nptrs++] = *ptr;
 178             }
 179             break;
 180
 181         case THUNK:
 182         case THUNK_1_0:
 183         case THUNK_0_1:
 184         case THUNK_1_1:
 185         case THUNK_2_0:
 186         case THUNK_0_2:
 187         case THUNK_STATIC:
 188             end = ((StgThunk *)closure)->payload + info->layout.payload.ptrs;
 189             for (ptr = ((StgThunk *)closure)->payload; ptr < end; ptr++) {
 190                 ptrs[nptrs++] = *ptr;
 191             }
 192             break;
 193
 194         case THUNK_SELECTOR:
 195             ptrs[nptrs++] = ((StgSelector *)closure)->selectee;
 196             break;
 197
 198         case AP:
 199             ptrs[nptrs++] = ((StgAP *)closure)->fun;
 200             closure_ptrs_in_pap_payload(ptrs, &nptrs,
 201                 ((StgAP *)closure)->fun,
 202                 ((StgAP *)closure)->payload,
 203                 ((StgAP *)closure)->n_args);
 204             break;
 205
 206         case PAP:
 207             ptrs[nptrs++] = ((StgPAP *)closure)->fun;
 208             closure_ptrs_in_pap_payload(ptrs, &nptrs,
 209                 ((StgPAP *)closure)->fun,
 210                 ((StgPAP *)closure)->payload,
 211                 ((StgPAP *)closure)->n_args);
 212             break;
 213
 214         case AP_STACK:
 215             ptrs[nptrs++] = ((StgAP_STACK *)closure)->fun;
 216             for (i = 0; i < ((StgAP_STACK *)closure)->size; ++i) {
 217                 ptrs[nptrs++] = ((StgAP_STACK *)closure)->payload[i];
 218             }
 219             break;
 220
 221         case BCO:
 222             ptrs[nptrs++] = (StgClosure *)((StgBCO *)closure)->instrs;
 223             ptrs[nptrs++] = (StgClosure *)((StgBCO *)closure)->literals;
 224             ptrs[nptrs++] = (StgClosure *)((StgBCO *)closure)->ptrs;
 225             break;
 226
 227         case IND:
 228         case IND_PERM:
 229         case IND_STATIC:
 230         case BLACKHOLE:
 231             ptrs[nptrs++] = (StgClosure *)(((StgInd *)closure)->indirectee);
 232             break;
 233
 234         case MUT_ARR_PTRS_CLEAN:
 235         case MUT_ARR_PTRS_DIRTY:
 236         case MUT_ARR_PTRS_FROZEN:
 237             for (i = 0; i < ((StgMutArrPtrs *)closure)->ptrs; ++i) {
 238                 ptrs[nptrs++] = ((StgMutArrPtrs *)closure)->payload[i];
 239             }
 240             break;
 241
 242         default:
 243             fprintf(stderr,"closurePtrs: Cannot handle type %s yet\n", closure_type_names[info->type]);
 244             break;
 245     }
 246
 247     size = nptrs + mutArrPtrsCardTableSize(nptrs);
 248     StgMutArrPtrs *arr =
 249         (StgMutArrPtrs *)allocate(cap, sizeofW(StgMutArrPtrs) + size);
 250     TICK_ALLOC_PRIM(sizeofW(StgMutArrPtrs), nptrs, 0);
 251     SET_HDR(arr, &stg_MUT_ARR_PTRS_FROZEN_info, CCCS);
 252     arr->ptrs = nptrs;
 253     arr->size = size;
 254
 255     for (i = 0; i<nptrs; i++) {
 256         arr->payload[i] = ptrs[i];
 257     }
 258
 259     return arr;
 260 }