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
29 #include "v8.h"
30
31 #include "cctest.h"
32 #include "compiler.h"
33 #include "execution.h"
34 #include "isolate.h"
35
36
37 using namespace v8::internal;
38
39 static v8::Persistent<v8::Context> env;
40
41
SetSeeds(Handle<ByteArray> seeds,uint32_t state0,uint32_t state1)42 void SetSeeds(Handle<ByteArray> seeds, uint32_t state0, uint32_t state1) {
43 for (int i = 0; i < 4; i++) {
44 seeds->set(i, static_cast<byte>(state0 >> (i * kBitsPerByte)));
45 seeds->set(i + 4, static_cast<byte>(state1 >> (i * kBitsPerByte)));
46 }
47 }
48
49
TestSeeds(Handle<JSFunction> fun,Handle<Context> context,uint32_t state0,uint32_t state1)50 void TestSeeds(Handle<JSFunction> fun,
51 Handle<Context> context,
52 uint32_t state0,
53 uint32_t state1) {
54 bool has_pending_exception;
55 Handle<JSObject> global(context->global());
56 Handle<ByteArray> seeds(context->random_seed());
57
58 SetSeeds(seeds, state0, state1);
59 Handle<Object> value =
60 Execution::Call(fun, global, 0, NULL, &has_pending_exception);
61 CHECK(value->IsHeapNumber());
62 CHECK(fun->IsOptimized());
63 double crankshaft_value = HeapNumber::cast(*value)->value();
64
65 SetSeeds(seeds, state0, state1);
66 V8::FillHeapNumberWithRandom(*value, *context);
67 double runtime_value = HeapNumber::cast(*value)->value();
68 CHECK_EQ(runtime_value, crankshaft_value);
69 }
70
71
TEST(CrankshaftRandom)72 TEST(CrankshaftRandom) {
73 if (env.IsEmpty()) env = v8::Context::New();
74 // Skip test if crankshaft is disabled.
75 if (!V8::UseCrankshaft()) return;
76 v8::HandleScope scope;
77 env->Enter();
78
79 Handle<Context> context(Isolate::Current()->context());
80 Handle<JSObject> global(context->global());
81 Handle<ByteArray> seeds(context->random_seed());
82 bool has_pending_exception;
83
84 CompileRun("function f() { return Math.random(); }");
85
86 Object* symbol = FACTORY->LookupAsciiSymbol("f")->ToObjectChecked();
87 MaybeObject* fun_object =
88 context->global()->GetProperty(String::cast(symbol));
89 Handle<JSFunction> fun(JSFunction::cast(fun_object->ToObjectChecked()));
90
91 // Optimize function.
92 Execution::Call(fun, global, 0, NULL, &has_pending_exception);
93 Execution::Call(fun, global, 0, NULL, &has_pending_exception);
94 if (!fun->IsOptimized()) fun->MarkForLazyRecompilation();
95
96 // Test with some random values.
97 TestSeeds(fun, context, 0xC0C0AFFE, 0x31415926);
98 TestSeeds(fun, context, 0x01020304, 0xFFFFFFFF);
99 TestSeeds(fun, context, 0x00000001, 0x00000000);
100
101 // Test that we bail out to runtime when seeds are uninitialized (zeros).
102 SetSeeds(seeds, 0, 0);
103 Handle<Object> value =
104 Execution::Call(fun, global, 0, NULL, &has_pending_exception);
105 CHECK(value->IsHeapNumber());
106 CHECK(fun->IsOptimized());
107 double crankshaft_value = HeapNumber::cast(*value)->value();
108 CHECK_NE(0.0, crankshaft_value);
109 }
110