Add support for a target new space size

test/cctest/test-spaces.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 438 matching lines @@
   CompileRun("/*empty*/");
   for (int i = FIRST_PAGED_SPACE; i <= LAST_PAGED_SPACE; i++) {
     // Debug code can be very large, so skip CODE_SPACE if we are generating it.
     if (i == CODE_SPACE && i::FLAG_debug_code) continue;
     CHECK_EQ(1, isolate->heap()->paged_space(i)->CountTotalPages());
   }
 
   // No large objects required to perform the above steps.
   CHECK(isolate->heap()->lo_space()->IsEmpty());
 }
+
+
+static inline void FillCurrentPage(v8::internal::NewSpace* space) {
+  int new_linear_size = static_cast<int>(*space->allocation_limit_address() -
+                                         *space->allocation_top_address());
+  if (new_linear_size == 0) return;
+  v8::internal::AllocationResult allocation =
+      space->AllocateRaw(new_linear_size);
+  v8::internal::FreeListNode* node =
+      v8::internal::FreeListNode::cast(allocation.ToObjectChecked());
+  node->set_size(space->heap(), new_linear_size);
+}
+
+
+UNINITIALIZED_TEST(NewSpaceGrowsToTargetCapacity) {
+  FLAG_target_semi_space_size = 2;
+
+  v8::Isolate* isolate = v8::Isolate::New();
+  {
+    v8::Isolate::Scope isolate_scope(isolate);
+    v8::HandleScope handle_scope(isolate);
+    v8::Context::New(isolate)->Enter();
+
+    Isolate* i_isolate = reinterpret_cast<Isolate*>(isolate);
+
+    NewSpace* new_space = i_isolate->heap()->new_space();
+
+    // This test doesn't work if we start with a non-default new space
+    // configuration.
+    if (new_space->InitialTotalCapacity() == Page::kPageSize) {
+      CHECK(new_space->CommittedMemory() == new_space->InitialTotalCapacity());
+
+      // Fill up the first (and only) page of the semi space.
+      FillCurrentPage(new_space);
+
+      // Try to allocate out of the new space. A new page should be added and
+      // the
+      // allocation should succeed.
+      v8::internal::AllocationResult allocation = new_space->AllocateRaw(80);
+      CHECK(!allocation.IsRetry());
+      CHECK(new_space->CommittedMemory() == 2 * Page::kPageSize);
+
+      // Turn the allocation into a proper object so isolate teardown won't
+      // crash.
+      v8::internal::FreeListNode* node =
+          v8::internal::FreeListNode::cast(allocation.ToObjectChecked());
+      node->set_size(new_space->heap(), 80);
+    }
+  }
+  isolate->Dispose();
+}