1 // Copyright 2012 the V8 project authors. All rights reserved. 2 // Redistribution and use in source and binary forms, with or without 3 // modification, are permitted provided that the following conditions are 4 // met: 5 // 6 // * Redistributions of source code must retain the above copyright 7 // notice, this list of conditions and the following disclaimer. 8 // * Redistributions in binary form must reproduce the above 9 // copyright notice, this list of conditions and the following 10 // disclaimer in the documentation and/or other materials provided 11 // with the distribution. 12 // * Neither the name of Google Inc. nor the names of its 13 // contributors may be used to endorse or promote products derived 14 // from this software without specific prior written permission. 15 // 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 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 "v8.h" 29 30 #include "cctest.h" 31 #include "compiler.h" 32 #include "execution.h" 33 #include "isolate.h" 34 35 36 using namespace v8::internal; 37 38 39 void SetSeeds(Handle<ByteArray> seeds, uint32_t state0, uint32_t state1) { 40 for (int i = 0; i < 4; i++) { 41 seeds->set(i, static_cast<byte>(state0 >> (i * kBitsPerByte))); 42 seeds->set(i + 4, static_cast<byte>(state1 >> (i * kBitsPerByte))); 43 } 44 } 45 46 47 void TestSeeds(Handle<JSFunction> fun, 48 Handle<Context> context, 49 uint32_t state0, 50 uint32_t state1) { 51 bool has_pending_exception; 52 Handle<JSObject> global(context->global_object()); 53 Handle<ByteArray> seeds(context->random_seed()); 54 55 SetSeeds(seeds, state0, state1); 56 Handle<Object> value = 57 Execution::Call(fun, global, 0, NULL, &has_pending_exception); 58 CHECK(value->IsHeapNumber()); 59 CHECK(fun->IsOptimized()); 60 double crankshaft_value = HeapNumber::cast(*value)->value(); 61 62 SetSeeds(seeds, state0, state1); 63 V8::FillHeapNumberWithRandom(*value, *context); 64 double runtime_value = HeapNumber::cast(*value)->value(); 65 CHECK_EQ(runtime_value, crankshaft_value); 66 } 67 68 69 TEST(CrankshaftRandom) { 70 v8::V8::Initialize(); 71 // Skip test if crankshaft is disabled. 72 if (!V8::UseCrankshaft()) return; 73 v8::Isolate* isolate = v8::Isolate::GetCurrent(); 74 v8::HandleScope scope(isolate); 75 v8::Context::Scope context_scope(v8::Context::New(isolate)); 76 77 Handle<Context> context(Isolate::Current()->context()); 78 Handle<JSObject> global(context->global_object()); 79 Handle<ByteArray> seeds(context->random_seed()); 80 bool has_pending_exception; 81 82 CompileRun("function f() { return Math.random(); }"); 83 84 Object* string = Isolate::Current()->factory()->InternalizeOneByteString( 85 STATIC_ASCII_VECTOR("f"))->ToObjectChecked(); 86 MaybeObject* fun_object = 87 context->global_object()->GetProperty(String::cast(string)); 88 Handle<JSFunction> fun(JSFunction::cast(fun_object->ToObjectChecked())); 89 90 // Optimize function. 91 Execution::Call(fun, global, 0, NULL, &has_pending_exception); 92 Execution::Call(fun, global, 0, NULL, &has_pending_exception); 93 if (!fun->IsOptimized()) fun->MarkForLazyRecompilation(); 94 95 // Test with some random values. 96 TestSeeds(fun, context, 0xC0C0AFFE, 0x31415926); 97 TestSeeds(fun, context, 0x01020304, 0xFFFFFFFF); 98 TestSeeds(fun, context, 0x00000001, 0x00000000); 99 100 // Test that we bail out to runtime when seeds are uninitialized (zeros). 101 SetSeeds(seeds, 0, 0); 102 Handle<Object> value = 103 Execution::Call(fun, global, 0, NULL, &has_pending_exception); 104 CHECK(value->IsHeapNumber()); 105 CHECK(fun->IsOptimized()); 106 double crankshaft_value = HeapNumber::cast(*value)->value(); 107 CHECK_NE(0.0, crankshaft_value); 108 } 109
