src/v8/test/mjsunit/large-object-allocation.js

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  27
  28 // Allocate a very large object that is guaranteed to overflow the
  29 // instance_size field in the map resulting in an object that is smaller
  30 // than what was called for.
  31 function LargeObject(i) {
  32   this.a = i;
  33   this.b = i;
  34   this.c = i;
  35   this.d = i;
  36   this.e = i;
  37   this.f = i;
  38   this.g = i;
  39   this.h = i;
  40   this.i = i;
  41   this.j = i;
  42   this.k = i;
  43   this.l = i;
  44   this.m = i;
  45   this.n = i;
  46   this.o = i;
  47   this.p = i;
  48   this.q = i;
  49   this.r = i;
  50   this.s = i;
  51   this.t = i;
  52   this.u = i;
  53   this.v = i;
  54   this.w = i;
  55   this.x = i;
  56   this.y = i;
  57   this.z = i;
  58   this.a1 = i;
  59   this.b1 = i;
  60   this.c1 = i;
  61   this.d1 = i;
  62   this.e1 = i;
  63   this.f1 = i;
  64   this.g1 = i;
  65   this.h1 = i;
  66   this.i1 = i;
  67   this.j1 = i;
  68   this.k1 = i;
  69   this.l1 = i;
  70   this.m1 = i;
  71   this.n1 = i;
  72   this.o1 = i;
  73   this.p1 = i;
  74   this.q1 = i;
  75   this.r1 = i;
  76   this.s1 = i;
  77   this.t1 = i;
  78   this.u1 = i;
  79   this.v1 = i;
  80   this.w1 = i;
  81   this.x1 = i;
  82   this.y1 = i;
  83   this.z1 = i;
  84   this.a2 = i;
  85   this.b2 = i;
  86   this.c2 = i;
  87   this.d2 = i;
  88   this.e2 = i;
  89   this.f2 = i;
  90   this.g2 = i;
  91   this.h2 = i;
  92   this.i2 = i;
  93   this.j2 = i;
  94   this.k2 = i;
  95   this.l2 = i;
  96   this.m2 = i;
  97   this.n2 = i;
  98   this.o2 = i;
  99   this.p2 = i;
 100   this.q2 = i;
 101   this.r2 = i;
 102   this.s2 = i;
 103   this.t2 = i;
 104   this.u2 = i;
 105   this.v2 = i;
 106   this.w2 = i;
 107   this.x2 = i;
 108   this.y2 = i;
 109   this.z2 = i;
 110   this.a3 = i;
 111   this.b3 = i;
 112   this.c3 = i;
 113   this.d3 = i;
 114   this.e3 = i;
 115   this.f3 = i;
 116   this.g3 = i;
 117   this.h3 = i;
 118   this.i3 = i;
 119   this.j3 = i;
 120   this.k3 = i;
 121   this.l3 = i;
 122   this.m3 = i;
 123   this.n3 = i;
 124   this.o3 = i;
 125   this.p3 = i;
 126   this.q3 = i;
 127   this.r3 = i;
 128   this.s3 = i;
 129   this.t3 = i;
 130   this.u3 = i;
 131   this.v3 = i;
 132   this.w3 = i;
 133   this.x3 = i;
 134   this.y3 = i;
 135   this.z3 = i;
 136   this.a4 = i;
 137   this.b4 = i;
 138   this.c4 = i;
 139   this.d4 = i;
 140   this.e4 = i;
 141   this.f4 = i;
 142   this.g4 = i;
 143   this.h4 = i;
 144   this.i4 = i;
 145   this.j4 = i;
 146   this.k4 = i;
 147   this.l4 = i;
 148   this.m4 = i;
 149   this.n4 = i;
 150   this.o4 = i;
 151   this.p4 = i;
 152   this.q4 = i;
 153   this.r4 = i;
 154   this.s4 = i;
 155   this.t4 = i;
 156   this.u4 = i;
 157   this.v4 = i;
 158   this.w4 = i;
 159   this.x4 = i;
 160   this.y4 = i;
 161   this.z4 = i;
 162   this.a5 = i;
 163   this.b5 = i;
 164   this.c5 = i;
 165   this.d5 = i;
 166   this.e5 = i;
 167   this.f5 = i;
 168   this.g5 = i;
 169   this.h5 = i;
 170   this.i5 = i;
 171   this.j5 = i;
 172   this.k5 = i;
 173   this.l5 = i;
 174   this.m5 = i;
 175   this.n5 = i;
 176   this.o5 = i;
 177   this.p5 = i;
 178   this.q5 = i;
 179   this.r5 = i;
 180   this.s5 = i;
 181   this.t5 = i;
 182   this.u5 = i;
 183   this.v5 = i;
 184   this.w5 = i;
 185   this.x5 = i;
 186   this.y5 = i;
 187   this.z5 = i;
 188   this.a6 = i;
 189   this.b6 = i;
 190   this.c6 = i;
 191   this.d6 = i;
 192   this.e6 = i;
 193   this.f6 = i;
 194   this.g6 = i;
 195   this.h6 = i;
 196   this.i6 = i;
 197   this.j6 = i;
 198   this.k6 = i;
 199   this.l6 = i;
 200   this.m6 = i;
 201   this.n6 = i;
 202   this.o6 = i;
 203   this.p6 = i;
 204   this.q6 = i;
 205   this.r6 = i;
 206   this.s6 = i;
 207   this.t6 = i;
 208   this.u6 = i;
 209   this.v6 = i;
 210   this.w6 = i;
 211   this.x6 = i;
 212   this.y6 = i;
 213   this.z6 = i;
 214   this.a7 = i;
 215   this.b7 = i;
 216   this.c7 = i;
 217   this.d7 = i;
 218   this.e7 = i;
 219   this.f7 = i;
 220   this.g7 = i;
 221   this.h7 = i;
 222   this.i7 = i;
 223   this.j7 = i;
 224   this.k7 = i;
 225   this.l7 = i;
 226   this.m7 = i;
 227   this.n7 = i;
 228   this.o7 = i;
 229   this.p7 = i;
 230   this.q7 = i;
 231   this.r7 = i;
 232   this.s7 = i;
 233   this.t7 = i;
 234   this.u7 = i;
 235   this.v7 = i;
 236   this.w7 = i;
 237   this.x7 = i;
 238   this.y7 = i;
 239   this.z7 = i;
 240   this.a8 = i;
 241   this.b8 = i;
 242   this.c8 = i;
 243   this.d8 = i;
 244   this.e8 = i;
 245   this.f8 = i;
 246   this.g8 = i;
 247   this.h8 = i;
 248   this.i8 = i;
 249   this.j8 = i;
 250   this.k8 = i;
 251   this.l8 = i;
 252   this.m8 = i;
 253   this.n8 = i;
 254   this.o8 = i;
 255   this.p8 = i;
 256   this.q8 = i;
 257   this.r8 = i;
 258   this.s8 = i;
 259   this.t8 = i;
 260   this.u8 = i;
 261   this.v8 = i;
 262   this.w8 = i;
 263   this.x8 = i;
 264   this.y8 = i;
 265   this.z8 = i;
 266   this.a9 = i;
 267   this.b9 = i;
 268   this.c9 = i;
 269   this.d9 = i;
 270   this.e9 = i;
 271   this.f9 = i;
 272   this.g9 = i;
 273   this.h9 = i;
 274   this.i9 = i;
 275   this.j9 = i;
 276   this.k9 = i;
 277   this.l9 = i;
 278   this.m9 = i;
 279   this.n9 = i;
 280   this.o9 = i;
 281   this.p9 = i;
 282   this.q9 = i;
 283   // With this number of properties the object perfectly wraps around if the
 284   // instance size is not checked when allocating the initial map for MultiProp.
 285   // Meaning that the instance will be smaller than a minimal JSObject and we
 286   // will suffer a bus error in the release build or an assertion in the debug
 287   // build.
 288 }
 289
 290 function ExpectAllFields(o, val) {
 291   for (var x in o) {
 292     assertEquals(o[x], val);
 293   }
 294 }
 295
 296 var a = new LargeObject(1);
 297 var b = new LargeObject(2);
 298
 299 ExpectAllFields(a, 1);
 300 ExpectAllFields(b, 2);