JezK
Edit File: test-random.cc
// 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 "cctest.h" #include "compiler.h" #include "execution.h" #include "isolate.h" using namespace v8::internal; static v8::Persistent<v8::Context> env; void SetSeeds(Handle<ByteArray> seeds, uint32_t state0, uint32_t state1) { for (int i = 0; i < 4; i++) { seeds->set(i, static_cast<byte>(state0 >> (i * kBitsPerByte))); seeds->set(i + 4, static_cast<byte>(state1 >> (i * kBitsPerByte))); } } void TestSeeds(Handle<JSFunction> fun, Handle<Context> context, uint32_t state0, uint32_t state1) { bool has_pending_exception; Handle<JSObject> global(context->global()); Handle<ByteArray> seeds(context->random_seed()); SetSeeds(seeds, state0, state1); Handle<Object> value = Execution::Call(fun, global, 0, NULL, &has_pending_exception); CHECK(value->IsHeapNumber()); CHECK(fun->IsOptimized()); double crankshaft_value = HeapNumber::cast(*value)->value(); SetSeeds(seeds, state0, state1); V8::FillHeapNumberWithRandom(*value, *context); double runtime_value = HeapNumber::cast(*value)->value(); CHECK_EQ(runtime_value, crankshaft_value); } TEST(CrankshaftRandom) { if (env.IsEmpty()) env = v8::Context::New(); // Skip test if crankshaft is disabled. if (!V8::UseCrankshaft()) return; v8::HandleScope scope; env->Enter(); Handle<Context> context(Isolate::Current()->context()); Handle<JSObject> global(context->global()); Handle<ByteArray> seeds(context->random_seed()); bool has_pending_exception; CompileRun("function f() { return Math.random(); }"); Object* symbol = FACTORY->LookupAsciiSymbol("f")->ToObjectChecked(); MaybeObject* fun_object = context->global()->GetProperty(String::cast(symbol)); Handle<JSFunction> fun(JSFunction::cast(fun_object->ToObjectChecked())); // Optimize function. Execution::Call(fun, global, 0, NULL, &has_pending_exception); Execution::Call(fun, global, 0, NULL, &has_pending_exception); if (!fun->IsOptimized()) fun->MarkForLazyRecompilation(); // Test with some random values. TestSeeds(fun, context, 0xC0C0AFFE, 0x31415926); TestSeeds(fun, context, 0x01020304, 0xFFFFFFFF); TestSeeds(fun, context, 0x00000001, 0x00000000); // Test that we bail out to runtime when seeds are uninitialized (zeros). SetSeeds(seeds, 0, 0); Handle<Object> value = Execution::Call(fun, global, 0, NULL, &has_pending_exception); CHECK(value->IsHeapNumber()); CHECK(fun->IsOptimized()); double crankshaft_value = HeapNumber::cast(*value)->value(); CHECK_NE(0.0, crankshaft_value); }