v8/test/cctest/test-alloc.cc
verwaest@chromium.org d53de0590a Swapped transition array and descriptor array.
Now a map points to a transition array which contains the descriptor array. The descriptor array is now immutable. The next step is to share the descriptor array with all back-pointed maps as long as there is a single line of extension. Maps that require a descriptor array but don't need transitions will still need a pseudo-empty transition array to contain the descriptor array.

Review URL: https://chromiumcodereview.appspot.com/10816005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12298 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-08-13 08:43:16 +00:00

248 lines
8.8 KiB
C++

// Copyright 2012 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
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "v8.h"
#include "accessors.h"
#include "cctest.h"
using namespace v8::internal;
// Also used in test-heap.cc test cases.
void SimulateFullSpace(PagedSpace* space) {
int old_linear_size = static_cast<int>(space->limit() - space->top());
space->Free(space->top(), old_linear_size);
space->SetTop(space->limit(), space->limit());
space->ResetFreeList();
space->ClearStats();
}
static MaybeObject* AllocateAfterFailures() {
static int attempts = 0;
if (++attempts < 3) return Failure::RetryAfterGC();
Heap* heap = Isolate::Current()->heap();
// New space.
NewSpace* new_space = heap->new_space();
static const int kNewSpaceFillerSize = ByteArray::SizeFor(0);
while (new_space->Available() > kNewSpaceFillerSize) {
int available_before = static_cast<int>(new_space->Available());
CHECK(!heap->AllocateByteArray(0)->IsFailure());
if (available_before == new_space->Available()) {
// It seems that we are avoiding new space allocations when
// allocation is forced, so no need to fill up new space
// in order to make the test harder.
break;
}
}
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(
*Isolate::Current()->object_function())->ToObjectChecked();
CHECK(!heap->CopyJSObject(JSObject::cast(object))->IsFailure());
// Old data space.
SimulateFullSpace(heap->old_data_space());
CHECK(!heap->AllocateRawAsciiString(100, TENURED)->IsFailure());
// Old pointer space.
SimulateFullSpace(heap->old_pointer_space());
CHECK(!heap->AllocateFixedArray(10000, TENURED)->IsFailure());
// Large object space.
static const int kLargeObjectSpaceFillerLength = 300000;
static const int kLargeObjectSpaceFillerSize = FixedArray::SizeFor(
kLargeObjectSpaceFillerLength);
ASSERT(kLargeObjectSpaceFillerSize > heap->old_pointer_space()->AreaSize());
while (heap->OldGenerationSpaceAvailable() > kLargeObjectSpaceFillerSize) {
CHECK(!heap->AllocateFixedArray(kLargeObjectSpaceFillerLength, TENURED)->
IsFailure());
}
CHECK(!heap->AllocateFixedArray(kLargeObjectSpaceFillerLength, TENURED)->
IsFailure());
// Map space.
SimulateFullSpace(heap->map_space());
int instance_size = JSObject::kHeaderSize;
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());
CHECK(!heap->CopyCode(Isolate::Current()->builtins()->builtin(
Builtins::kIllegal))->IsFailure());
// Return success.
return Smi::FromInt(42);
}
static Handle<Object> Test() {
CALL_HEAP_FUNCTION(ISOLATE, 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 MaybeObject* 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->ReplaceCode(Isolate::Current()->builtins()->builtin(
Builtins::kEmptyFunction));
// Patch the map to have an accessor for "get".
Handle<Map> map(function->initial_map());
Handle<DescriptorArray> instance_descriptors(map->instance_descriptors());
Handle<Foreign> foreign = FACTORY->NewForeign(&kDescriptor);
Handle<String> name =
FACTORY->NewStringFromAscii(Vector<const char>("get", 3));
ASSERT(instance_descriptors->IsEmpty());
Handle<DescriptorArray> new_descriptors = FACTORY->NewDescriptorArray(1);
v8::internal::DescriptorArray::WhitenessWitness witness(*new_descriptors);
v8::internal::Map::SetDescriptors(map, new_descriptors);
CallbacksDescriptor d(*name,
*foreign,
static_cast<PropertyAttributes>(0),
v8::internal::PropertyDetails::kInitialIndex);
map->AppendDescriptor(&d, witness);
// 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();
}
// CodeRange test.
// Tests memory management in a CodeRange by allocating and freeing blocks,
// using a pseudorandom generator to choose block sizes geometrically
// distributed between 2 * Page::kPageSize and 2^5 + 1 * Page::kPageSize.
// Ensure that the freed chunks are collected and reused by allocating (in
// total) more than the size of the CodeRange.
// This pseudorandom generator does not need to be particularly good.
// Use the lower half of the V8::Random() generator.
unsigned int Pseudorandom() {
static uint32_t lo = 2345;
lo = 18273 * (lo & 0xFFFF) + (lo >> 16); // Provably not 0.
return lo & 0xFFFF;
}
// Plain old data class. Represents a block of allocated memory.
class Block {
public:
Block(Address base_arg, int size_arg)
: base(base_arg), size(size_arg) {}
Address base;
int size;
};
TEST(CodeRange) {
const int code_range_size = 32*MB;
OS::SetUp();
Isolate::Current()->InitializeLoggingAndCounters();
CodeRange* code_range = new CodeRange(Isolate::Current());
code_range->SetUp(code_range_size);
int current_allocated = 0;
int total_allocated = 0;
List<Block> blocks(1000);
while (total_allocated < 5 * code_range_size) {
if (current_allocated < code_range_size / 10) {
// Allocate a block.
// Geometrically distributed sizes, greater than
// Page::kMaxNonCodeHeapObjectSize (which is greater than code page area).
// TODO(gc): instead of using 3 use some contant based on code_range_size
// kMaxHeapObjectSize.
size_t requested =
(Page::kMaxNonCodeHeapObjectSize << (Pseudorandom() % 3)) +
Pseudorandom() % 5000 + 1;
size_t allocated = 0;
Address base = code_range->AllocateRawMemory(requested, &allocated);
CHECK(base != NULL);
blocks.Add(Block(base, static_cast<int>(allocated)));
current_allocated += static_cast<int>(allocated);
total_allocated += static_cast<int>(allocated);
} else {
// Free a block.
int index = Pseudorandom() % blocks.length();
code_range->FreeRawMemory(blocks[index].base, blocks[index].size);
current_allocated -= blocks[index].size;
if (index < blocks.length() - 1) {
blocks[index] = blocks.RemoveLast();
} else {
blocks.RemoveLast();
}
}
}
code_range->TearDown();
delete code_range;
}