Cleanup test-alloc unit test case.

This makes the test-alloc test case more robust against changes to the
initial heap size. It correctly simulates a full space now instead of
trying to fill the space up by allocating filler objects.

R=svenpanne@chromium.org
TEST=cctest/test-alloc

Review URL: https://chromiumcodereview.appspot.com/10071003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11284 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/spaces.h

@@ -1520,6 +1520,10 @@ class PagedSpace : public Space {
     return size_in_bytes - wasted;
   }
 
+  void ResetFreeList() {
+    free_list_.Reset();
+  }
+
   // Set space allocation info.
   void SetTop(Address top, Address limit) {
     ASSERT(top == limit ||
@@ -2371,11 +2375,6 @@ class FixedSpace : public PagedSpace {
   // Prepares for a mark-compact GC.
   virtual void PrepareForMarkCompact();
 
- protected:
-  void ResetFreeList() {
-    free_list_.Reset();
-  }
-
  private:
   // The size of objects in this space.
   int object_size_in_bytes_;

test/cctest/test-alloc.cc

@@ -34,6 +34,13 @@
 using namespace v8::internal;
 
 
+static inline void SimulateFullSpace(PagedSpace* space) {
+  space->SetTop(space->limit(), space->limit());
+  space->ResetFreeList();
+  space->ClearStats();
+}
+
+
 static MaybeObject* AllocateAfterFailures() {
   static int attempts = 0;
   if (++attempts < 3) return Failure::RetryAfterGC();
@@ -65,24 +72,12 @@ static MaybeObject* AllocateAfterFailures() {
   CHECK(!heap->CopyJSObject(JSObject::cast(object))->IsFailure());
 
   // Old data space.
-  OldSpace* old_data_space = heap->old_data_space();
-  static const int kOldDataSpaceFillerSize = ByteArray::SizeFor(0);
-  while (old_data_space->Available() > kOldDataSpaceFillerSize) {
-    CHECK(!heap->AllocateByteArray(0, TENURED)->IsFailure());
-  }
+  SimulateFullSpace(heap->old_data_space());
   CHECK(!heap->AllocateRawAsciiString(100, TENURED)->IsFailure());
 
   // Old pointer space.
-  OldSpace* old_pointer_space = heap->old_pointer_space();
-  static const int kOldPointerSpaceFillerLength = 10000;
-  static const int kOldPointerSpaceFillerSize = FixedArray::SizeFor(
-      kOldPointerSpaceFillerLength);
-  while (old_pointer_space->Available() > kOldPointerSpaceFillerSize) {
-    CHECK(!heap->AllocateFixedArray(kOldPointerSpaceFillerLength, TENURED)->
-          IsFailure());
-  }
-  CHECK(!heap->AllocateFixedArray(kOldPointerSpaceFillerLength, TENURED)->
-        IsFailure());
+  SimulateFullSpace(heap->old_pointer_space());
+  CHECK(!heap->AllocateFixedArray(10000, TENURED)->IsFailure());
 
   // Large object space.
   static const int kLargeObjectSpaceFillerLength = 300000;
@@ -97,14 +92,9 @@ static MaybeObject* AllocateAfterFailures() {
         IsFailure());
 
   // Map space.
-  MapSpace* map_space = heap->map_space();
-  static const int kMapSpaceFillerSize = Map::kSize;
-  InstanceType instance_type = JS_OBJECT_TYPE;
+  SimulateFullSpace(heap->map_space());
   int instance_size = JSObject::kHeaderSize;
-  while (map_space->Available() > kMapSpaceFillerSize) {
-    CHECK(!heap->AllocateMap(instance_type, instance_size)->IsFailure());
-  }
-  CHECK(!heap->AllocateMap(instance_type, instance_size)->IsFailure());
+  CHECK(!heap->AllocateMap(JS_OBJECT_TYPE, instance_size)->IsFailure());
 
   // Test that we can allocate in old pointer space and code space.
   CHECK(!heap->AllocateFixedArray(100, TENURED)->IsFailure());