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      1 // Copyright 2012 the V8 project authors. All rights reserved.
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      3 // modification, are permitted provided that the following conditions are
      4 // met:
      5 //
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      8 //     * Redistributions in binary form must reproduce the above
      9 //       copyright notice, this list of conditions and the following
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     14 //       from this software without specific prior written permission.
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     16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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     25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27 
     28 #include "src/v8.h"
     29 #include "test/cctest/cctest.h"
     30 
     31 #include "src/accessors.h"
     32 #include "src/api.h"
     33 
     34 
     35 using namespace v8::internal;
     36 
     37 
     38 static AllocationResult AllocateAfterFailures() {
     39   static int attempts = 0;
     40 
     41   if (++attempts < 3) return AllocationResult::Retry();
     42   TestHeap* heap = CcTest::test_heap();
     43 
     44   // New space.
     45   SimulateFullSpace(heap->new_space());
     46   heap->AllocateByteArray(100).ToObjectChecked();
     47   heap->AllocateFixedArray(100, NOT_TENURED).ToObjectChecked();
     48 
     49   // Make sure we can allocate through optimized allocation functions
     50   // for specific kinds.
     51   heap->AllocateFixedArray(100).ToObjectChecked();
     52   heap->AllocateHeapNumber(0.42).ToObjectChecked();
     53   Object* object = heap->AllocateJSObject(
     54       *CcTest::i_isolate()->object_function()).ToObjectChecked();
     55   heap->CopyJSObject(JSObject::cast(object)).ToObjectChecked();
     56 
     57   // Old data space.
     58   SimulateFullSpace(heap->old_data_space());
     59   heap->AllocateByteArray(100, TENURED).ToObjectChecked();
     60 
     61   // Old pointer space.
     62   SimulateFullSpace(heap->old_pointer_space());
     63   heap->AllocateFixedArray(10000, TENURED).ToObjectChecked();
     64 
     65   // Large object space.
     66   static const int kLargeObjectSpaceFillerLength = 300000;
     67   static const int kLargeObjectSpaceFillerSize = FixedArray::SizeFor(
     68       kLargeObjectSpaceFillerLength);
     69   DCHECK(kLargeObjectSpaceFillerSize > heap->old_pointer_space()->AreaSize());
     70   while (heap->OldGenerationSpaceAvailable() > kLargeObjectSpaceFillerSize) {
     71     heap->AllocateFixedArray(
     72         kLargeObjectSpaceFillerLength, TENURED).ToObjectChecked();
     73   }
     74   heap->AllocateFixedArray(
     75       kLargeObjectSpaceFillerLength, TENURED).ToObjectChecked();
     76 
     77   // Map space.
     78   SimulateFullSpace(heap->map_space());
     79   int instance_size = JSObject::kHeaderSize;
     80   heap->AllocateMap(JS_OBJECT_TYPE, instance_size).ToObjectChecked();
     81 
     82   // Test that we can allocate in old pointer space and code space.
     83   SimulateFullSpace(heap->code_space());
     84   heap->AllocateFixedArray(100, TENURED).ToObjectChecked();
     85   heap->CopyCode(CcTest::i_isolate()->builtins()->builtin(
     86       Builtins::kIllegal)).ToObjectChecked();
     87 
     88   // Return success.
     89   return Smi::FromInt(42);
     90 }
     91 
     92 
     93 static Handle<Object> Test() {
     94   CALL_HEAP_FUNCTION(CcTest::i_isolate(), AllocateAfterFailures(), Object);
     95 }
     96 
     97 
     98 TEST(StressHandles) {
     99   v8::HandleScope scope(CcTest::isolate());
    100   v8::Handle<v8::Context> env = v8::Context::New(CcTest::isolate());
    101   env->Enter();
    102   Handle<Object> o = Test();
    103   CHECK(o->IsSmi() && Smi::cast(*o)->value() == 42);
    104   env->Exit();
    105 }
    106 
    107 
    108 void TestGetter(
    109     v8::Local<v8::Name> name,
    110     const v8::PropertyCallbackInfo<v8::Value>& info) {
    111   i::Isolate* isolate = reinterpret_cast<i::Isolate*>(info.GetIsolate());
    112   HandleScope scope(isolate);
    113   info.GetReturnValue().Set(v8::Utils::ToLocal(Test()));
    114 }
    115 
    116 
    117 void TestSetter(
    118     v8::Local<v8::Name> name,
    119     v8::Local<v8::Value> value,
    120     const v8::PropertyCallbackInfo<void>& info) {
    121   UNREACHABLE();
    122 }
    123 
    124 
    125 Handle<AccessorInfo> TestAccessorInfo(
    126       Isolate* isolate, PropertyAttributes attributes) {
    127   Handle<String> name = isolate->factory()->NewStringFromStaticChars("get");
    128   return Accessors::MakeAccessor(isolate, name, &TestGetter, &TestSetter,
    129                                  attributes);
    130 }
    131 
    132 
    133 TEST(StressJS) {
    134   Isolate* isolate = CcTest::i_isolate();
    135   Factory* factory = isolate->factory();
    136   v8::HandleScope scope(CcTest::isolate());
    137   v8::Handle<v8::Context> env = v8::Context::New(CcTest::isolate());
    138   env->Enter();
    139   Handle<JSFunction> function = factory->NewFunction(
    140       factory->function_string());
    141   // Force the creation of an initial map and set the code to
    142   // something empty.
    143   factory->NewJSObject(function);
    144   function->ReplaceCode(CcTest::i_isolate()->builtins()->builtin(
    145       Builtins::kEmptyFunction));
    146   // Patch the map to have an accessor for "get".
    147   Handle<Map> map(function->initial_map());
    148   Handle<DescriptorArray> instance_descriptors(map->instance_descriptors());
    149   DCHECK(instance_descriptors->IsEmpty());
    150 
    151   PropertyAttributes attrs = static_cast<PropertyAttributes>(0);
    152   Handle<AccessorInfo> foreign = TestAccessorInfo(isolate, attrs);
    153   Map::EnsureDescriptorSlack(map, 1);
    154 
    155   CallbacksDescriptor d(Handle<Name>(Name::cast(foreign->name())),
    156                         foreign, attrs);
    157   map->AppendDescriptor(&d);
    158 
    159   // Add the Foo constructor the global object.
    160   env->Global()->Set(v8::String::NewFromUtf8(CcTest::isolate(), "Foo"),
    161                      v8::Utils::ToLocal(function));
    162   // Call the accessor through JavaScript.
    163   v8::Handle<v8::Value> result = v8::Script::Compile(
    164       v8::String::NewFromUtf8(CcTest::isolate(), "(new Foo).get"))->Run();
    165   CHECK_EQ(42, result->Int32Value());
    166   env->Exit();
    167 }
    168 
    169 
    170 // CodeRange test.
    171 // Tests memory management in a CodeRange by allocating and freeing blocks,
    172 // using a pseudorandom generator to choose block sizes geometrically
    173 // distributed between 2 * Page::kPageSize and 2^5 + 1 * Page::kPageSize.
    174 // Ensure that the freed chunks are collected and reused by allocating (in
    175 // total) more than the size of the CodeRange.
    176 
    177 // This pseudorandom generator does not need to be particularly good.
    178 // Use the lower half of the V8::Random() generator.
    179 unsigned int Pseudorandom() {
    180   static uint32_t lo = 2345;
    181   lo = 18273 * (lo & 0xFFFF) + (lo >> 16);  // Provably not 0.
    182   return lo & 0xFFFF;
    183 }
    184 
    185 
    186 // Plain old data class.  Represents a block of allocated memory.
    187 class Block {
    188  public:
    189   Block(Address base_arg, int size_arg)
    190       : base(base_arg), size(size_arg) {}
    191 
    192   Address base;
    193   int size;
    194 };
    195 
    196 
    197 TEST(CodeRange) {
    198   const size_t code_range_size = 32*MB;
    199   CcTest::InitializeVM();
    200   CodeRange code_range(reinterpret_cast<Isolate*>(CcTest::isolate()));
    201   code_range.SetUp(code_range_size);
    202   size_t current_allocated = 0;
    203   size_t total_allocated = 0;
    204   List< ::Block> blocks(1000);
    205 
    206   while (total_allocated < 5 * code_range_size) {
    207     if (current_allocated < code_range_size / 10) {
    208       // Allocate a block.
    209       // Geometrically distributed sizes, greater than
    210       // Page::kMaxRegularHeapObjectSize (which is greater than code page area).
    211       // TODO(gc): instead of using 3 use some contant based on code_range_size
    212       // kMaxHeapObjectSize.
    213       size_t requested =
    214           (Page::kMaxRegularHeapObjectSize << (Pseudorandom() % 3)) +
    215           Pseudorandom() % 5000 + 1;
    216       size_t allocated = 0;
    217       Address base = code_range.AllocateRawMemory(requested,
    218                                                   requested,
    219                                                   &allocated);
    220       CHECK(base != NULL);
    221       blocks.Add(::Block(base, static_cast<int>(allocated)));
    222       current_allocated += static_cast<int>(allocated);
    223       total_allocated += static_cast<int>(allocated);
    224     } else {
    225       // Free a block.
    226       int index = Pseudorandom() % blocks.length();
    227       code_range.FreeRawMemory(blocks[index].base, blocks[index].size);
    228       current_allocated -= blocks[index].size;
    229       if (index < blocks.length() - 1) {
    230         blocks[index] = blocks.RemoveLast();
    231       } else {
    232         blocks.RemoveLast();
    233       }
    234     }
    235   }
    236 
    237   code_range.TearDown();
    238 }
    239