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109 lines
4.1 KiB
109 lines
4.1 KiB
// Copyright 2012 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "v8.h"
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#include "cctest.h"
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#include "compiler.h"
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#include "execution.h"
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#include "isolate.h"
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using namespace v8::internal;
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static v8::Persistent<v8::Context> env;
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void SetSeeds(Handle<ByteArray> seeds, uint32_t state0, uint32_t state1) {
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for (int i = 0; i < 4; i++) {
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seeds->set(i, static_cast<byte>(state0 >> (i * kBitsPerByte)));
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seeds->set(i + 4, static_cast<byte>(state1 >> (i * kBitsPerByte)));
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}
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}
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void TestSeeds(Handle<JSFunction> fun,
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Handle<Context> context,
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uint32_t state0,
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uint32_t state1) {
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bool has_pending_exception;
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Handle<JSObject> global(context->global_object());
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Handle<ByteArray> seeds(context->random_seed());
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SetSeeds(seeds, state0, state1);
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Handle<Object> value =
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Execution::Call(fun, global, 0, NULL, &has_pending_exception);
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CHECK(value->IsHeapNumber());
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CHECK(fun->IsOptimized());
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double crankshaft_value = HeapNumber::cast(*value)->value();
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SetSeeds(seeds, state0, state1);
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V8::FillHeapNumberWithRandom(*value, *context);
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double runtime_value = HeapNumber::cast(*value)->value();
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CHECK_EQ(runtime_value, crankshaft_value);
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}
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TEST(CrankshaftRandom) {
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if (env.IsEmpty()) env = v8::Context::New();
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// Skip test if crankshaft is disabled.
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if (!V8::UseCrankshaft()) return;
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v8::HandleScope scope;
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env->Enter();
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Handle<Context> context(Isolate::Current()->context());
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Handle<JSObject> global(context->global_object());
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Handle<ByteArray> seeds(context->random_seed());
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bool has_pending_exception;
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CompileRun("function f() { return Math.random(); }");
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Object* symbol = FACTORY->LookupAsciiSymbol("f")->ToObjectChecked();
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MaybeObject* fun_object =
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context->global_object()->GetProperty(String::cast(symbol));
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Handle<JSFunction> fun(JSFunction::cast(fun_object->ToObjectChecked()));
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// Optimize function.
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Execution::Call(fun, global, 0, NULL, &has_pending_exception);
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Execution::Call(fun, global, 0, NULL, &has_pending_exception);
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if (!fun->IsOptimized()) fun->MarkForLazyRecompilation();
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// Test with some random values.
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TestSeeds(fun, context, 0xC0C0AFFE, 0x31415926);
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TestSeeds(fun, context, 0x01020304, 0xFFFFFFFF);
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TestSeeds(fun, context, 0x00000001, 0x00000000);
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// Test that we bail out to runtime when seeds are uninitialized (zeros).
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SetSeeds(seeds, 0, 0);
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Handle<Object> value =
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Execution::Call(fun, global, 0, NULL, &has_pending_exception);
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CHECK(value->IsHeapNumber());
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CHECK(fun->IsOptimized());
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double crankshaft_value = HeapNumber::cast(*value)->value();
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CHECK_NE(0.0, crankshaft_value);
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}
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