Make unit tests that fill new-space work under stress.

test/cctest/test-heap.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 
 #include <stdlib.h>
 
 #include "v8.h"
 
 #include "compilation-cache.h"
 #include "execution.h"
 #include "factory.h"
 #include "macro-assembler.h"
@@ skipping 1926 matching lines @@
 }
 
 
 // Test that HAllocateObject will always return an object in new-space.
 TEST(OptimizedAllocationAlwaysInNewSpace) {
   i::FLAG_allow_natives_syntax = true;
   InitializeVM();
   if (!i::V8::UseCrankshaft() || i::FLAG_always_opt) return;
   v8::HandleScope scope;
 
-  FillUpNewSpace(HEAP->new_space());
+  SimulateFullSpace(HEAP->new_space());
   AlwaysAllocateScope always_allocate;
   v8::Local<v8::Value> res = CompileRun(
       "function c(x) {"
       "  this.x = x;"
       "  for (var i = 0; i < 32; i++) {"
       "    this['x' + i] = x;"
       "  }"
       "}"
       "function f(x) { return new c(x); };"
       "f(1); f(2); f(3);"
@@ skipping 188 matching lines @@
   {
     // Generate a parent that lives in new-space.
     v8::HandleScope inner_scope;
     const char* c = "This text is long enough to trigger sliced strings.";
     Handle<String> s = FACTORY->NewStringFromAscii(CStrVector(c));
     CHECK(s->IsSeqOneByteString());
     CHECK(HEAP->InNewSpace(*s));
 
     // Generate a sliced string that is based on the above parent and
     // lives in old-space.
-    FillUpNewSpace(HEAP->new_space());
+    SimulateFullSpace(HEAP->new_space());
     AlwaysAllocateScope always_allocate;
-    Handle<String> t;
-    // TODO(mstarzinger): Unfortunately FillUpNewSpace() still leaves
-    // some slack, so we need to allocate a few sliced strings.
-    for (int i = 0; i < 16; i++) {
-      t = FACTORY->NewProperSubString(s, 5, 35);
-    }
+    Handle<String> t = FACTORY->NewProperSubString(s, 5, 35);
     CHECK(t->IsSlicedString());
     CHECK(!HEAP->InNewSpace(*t));
     *slice.location() = *t.location();
   }
 
   CHECK(SlicedString::cast(*slice)->parent()->IsSeqOneByteString());
   HEAP->CollectAllGarbage(Heap::kNoGCFlags);
   CHECK(SlicedString::cast(*slice)->parent()->IsSeqOneByteString());
 }
 
@@ skipping 328 matching lines @@
   Handle<Object> call_function(call);
 
   // Now we are ready to mess up the heap.
   HEAP->CollectAllGarbage(Heap::kReduceMemoryFootprintMask);
 
   // Either heap verification caught the problem already or we go kaboom once
   // the CallIC is executed the next time.
   USE(global->SetProperty(*name, *call_function, NONE, kNonStrictMode));
   CompileRun("call();");
 }