v8/test/cctest/test-alloc.cc

// Copyright 2007-2008 the V8 project authors. All rights reserved.
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#include "v8.h"
#include "accessors.h"
#include "top.h"

#include "cctest.h"


using namespace v8::internal;


static Object* AllocateAfterFailures() {
  static int attempts = 0;
  if (++attempts < 3) return Failure::RetryAfterGC(0);

  // New space.
  NewSpace* new_space = Heap::new_space();
  static const int kNewSpaceFillerSize = ByteArray::SizeFor(0);
  while (new_space->Available() > kNewSpaceFillerSize) {
    CHECK(!Heap::AllocateByteArray(0)->IsFailure());
  }
  CHECK(!Heap::AllocateByteArray(100)->IsFailure());
  CHECK(!Heap::AllocateFixedArray(100, NOT_TENURED)->IsFailure());

  // Make sure we can allocate through optimized allocation functions
  // for specific kinds.
  CHECK(!Heap::AllocateFixedArray(100)->IsFailure());
  CHECK(!Heap::AllocateHeapNumber(0.42)->IsFailure());
  CHECK(!Heap::AllocateArgumentsObject(Smi::FromInt(87), 10)->IsFailure());
  Object* object = Heap::AllocateJSObject(*Top::object_function());
  CHECK(!Heap::CopyJSObject(JSObject::cast(object))->IsFailure());

  // Old data space.
  OldSpace* old_data_space = Heap::old_data_space();
  static const int kOldDataSpaceFillerSize = SeqAsciiString::SizeFor(0);
  while (old_data_space->Available() > kOldDataSpaceFillerSize) {
    CHECK(!Heap::AllocateRawAsciiString(0, TENURED)->IsFailure());
  }
  CHECK(!Heap::AllocateRawAsciiString(100, TENURED)->IsFailure());

  // Large object space.
  while (!Heap::OldGenerationAllocationLimitReached()) {
    CHECK(!Heap::AllocateFixedArray(10000, TENURED)->IsFailure());
  }
  CHECK(!Heap::AllocateFixedArray(10000, TENURED)->IsFailure());

  // Map space.
  MapSpace* map_space = Heap::map_space();
  static const int kMapSpaceFillerSize = Map::kSize;
  InstanceType instance_type = JS_OBJECT_TYPE;
  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());

  // Test that we can allocate in old pointer space and code space.
  CHECK(!Heap::AllocateFixedArray(100, TENURED)->IsFailure());
  CHECK(!Heap::CopyCode(Builtins::builtin(Builtins::Illegal))->IsFailure());

  // Return success.
  return Smi::FromInt(42);
}


static Handle<Object> Test() {
  CALL_HEAP_FUNCTION(AllocateAfterFailures(), Object);
}


TEST(StressHandles) {
  v8::Persistent<v8::Context> env = v8::Context::New();
  v8::HandleScope scope;
  env->Enter();
  Handle<Object> o = Test();
  CHECK(o->IsSmi() && Smi::cast(*o)->value() == 42);
  env->Exit();
}


static Object* TestAccessorGet(Object* object, void*) {
  return AllocateAfterFailures();
}


const AccessorDescriptor kDescriptor = {
  TestAccessorGet,
  0,
  0
};


TEST(StressJS) {
  v8::Persistent<v8::Context> env = v8::Context::New();
  v8::HandleScope scope;
  env->Enter();
  Handle<JSFunction> function =
      Factory::NewFunction(Factory::function_symbol(), Factory::null_value());
  // Force the creation of an initial map and set the code to
  // something empty.
  Factory::NewJSObject(function);
  function->set_code(Builtins::builtin(Builtins::EmptyFunction));
  // Patch the map to have an accessor for "get".
  Handle<Map> map(function->initial_map());
  Handle<DescriptorArray> instance_descriptors(map->instance_descriptors());
  Handle<Proxy> proxy = Factory::NewProxy(&kDescriptor);
  instance_descriptors = Factory::CopyAppendProxyDescriptor(
      instance_descriptors,
      Factory::NewStringFromAscii(Vector<const char>("get", 3)),
      proxy,
      static_cast<PropertyAttributes>(0));
  map->set_instance_descriptors(*instance_descriptors);
  // Add the Foo constructor the global object.
  env->Global()->Set(v8::String::New("Foo"), v8::Utils::ToLocal(function));
  // Call the accessor through JavaScript.
  v8::Handle<v8::Value> result =
      v8::Script::Compile(v8::String::New("(new Foo).get"))->Run();
  CHECK_EQ(42, result->Int32Value());
  env->Exit();
}