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
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.
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.
35 #include "disassembler.h"
36 #include "execution.h"
41 using namespace v8::internal;
43 static v8::Persistent<v8::Context> env;
45 // --- P r i n t E x t e n s i o n ---
47 class PrintExtension : public v8::Extension {
49 PrintExtension() : v8::Extension("v8/print", kSource) { }
50 virtual v8::Handle<v8::FunctionTemplate> GetNativeFunction(
51 v8::Handle<v8::String> name);
52 static v8::Handle<v8::Value> Print(const v8::Arguments& args);
54 static const char* kSource;
58 const char* PrintExtension::kSource = "native function print();";
61 v8::Handle<v8::FunctionTemplate> PrintExtension::GetNativeFunction(
62 v8::Handle<v8::String> str) {
63 return v8::FunctionTemplate::New(PrintExtension::Print);
67 v8::Handle<v8::Value> PrintExtension::Print(const v8::Arguments& args) {
68 for (int i = 0; i < args.Length(); i++) {
69 if (i != 0) printf(" ");
70 v8::HandleScope scope;
71 v8::Handle<v8::Value> arg = args[i];
72 v8::Handle<v8::String> string_obj = arg->ToString();
73 if (string_obj.IsEmpty()) return string_obj;
74 int length = string_obj->Length();
75 uint16_t* string = NewArray<uint16_t>(length + 1);
76 string_obj->Write(string);
77 for (int j = 0; j < length; j++)
78 printf("%lc", static_cast<wchar_t>(string[j]));
82 return v8::Undefined();
86 static PrintExtension kPrintExtension;
87 v8::DeclareExtension kPrintExtensionDeclaration(&kPrintExtension);
90 static void InitializeVM() {
92 v8::HandleScope scope;
93 const char* extensions[] = { "v8/print", "v8/gc" };
94 v8::ExtensionConfiguration config(2, extensions);
95 env = v8::Context::New(&config);
97 v8::HandleScope scope;
102 static MaybeObject* GetGlobalProperty(const char* name) {
103 Handle<String> symbol = FACTORY->LookupAsciiSymbol(name);
104 return Isolate::Current()->context()->global()->GetProperty(*symbol);
108 static void SetGlobalProperty(const char* name, Object* value) {
109 Handle<Object> object(value);
110 Handle<String> symbol = FACTORY->LookupAsciiSymbol(name);
111 Handle<JSObject> global(Isolate::Current()->context()->global());
112 SetProperty(global, symbol, object, NONE, kNonStrictMode);
116 static Handle<JSFunction> Compile(const char* source) {
117 Handle<String> source_code(FACTORY->NewStringFromUtf8(CStrVector(source)));
118 Handle<SharedFunctionInfo> shared_function =
119 Compiler::Compile(source_code,
125 Handle<String>::null(),
127 return FACTORY->NewFunctionFromSharedFunctionInfo(shared_function,
128 Isolate::Current()->global_context());
132 static double Inc(int x) {
133 const char* source = "result = %d + 1;";
134 EmbeddedVector<char, 512> buffer;
135 OS::SNPrintF(buffer, source, x);
137 Handle<JSFunction> fun = Compile(buffer.start());
138 if (fun.is_null()) return -1;
140 bool has_pending_exception;
141 Handle<JSObject> global(Isolate::Current()->context()->global());
142 Execution::Call(fun, global, 0, NULL, &has_pending_exception);
143 CHECK(!has_pending_exception);
144 return GetGlobalProperty("result")->ToObjectChecked()->Number();
150 v8::HandleScope scope;
151 CHECK_EQ(4.0, Inc(3));
155 static double Add(int x, int y) {
156 Handle<JSFunction> fun = Compile("result = x + y;");
157 if (fun.is_null()) return -1;
159 SetGlobalProperty("x", Smi::FromInt(x));
160 SetGlobalProperty("y", Smi::FromInt(y));
161 bool has_pending_exception;
162 Handle<JSObject> global(Isolate::Current()->context()->global());
163 Execution::Call(fun, global, 0, NULL, &has_pending_exception);
164 CHECK(!has_pending_exception);
165 return GetGlobalProperty("result")->ToObjectChecked()->Number();
171 v8::HandleScope scope;
172 CHECK_EQ(5.0, Add(2, 3));
176 static double Abs(int x) {
177 Handle<JSFunction> fun = Compile("if (x < 0) result = -x; else result = x;");
178 if (fun.is_null()) return -1;
180 SetGlobalProperty("x", Smi::FromInt(x));
181 bool has_pending_exception;
182 Handle<JSObject> global(Isolate::Current()->context()->global());
183 Execution::Call(fun, global, 0, NULL, &has_pending_exception);
184 CHECK(!has_pending_exception);
185 return GetGlobalProperty("result")->ToObjectChecked()->Number();
191 v8::HandleScope scope;
192 CHECK_EQ(3.0, Abs(-3));
196 static double Sum(int n) {
197 Handle<JSFunction> fun =
198 Compile("s = 0; while (n > 0) { s += n; n -= 1; }; result = s;");
199 if (fun.is_null()) return -1;
201 SetGlobalProperty("n", Smi::FromInt(n));
202 bool has_pending_exception;
203 Handle<JSObject> global(Isolate::Current()->context()->global());
204 Execution::Call(fun, global, 0, NULL, &has_pending_exception);
205 CHECK(!has_pending_exception);
206 return GetGlobalProperty("result")->ToObjectChecked()->Number();
212 v8::HandleScope scope;
213 CHECK_EQ(5050.0, Sum(100));
219 v8::HandleScope scope;
220 const char* source = "for (n = 0; n < 100; ++n) print(n, 1, 2);";
221 Handle<JSFunction> fun = Compile(source);
222 if (fun.is_null()) return;
223 bool has_pending_exception;
224 Handle<JSObject> global(Isolate::Current()->context()->global());
225 Execution::Call(fun, global, 0, NULL, &has_pending_exception);
226 CHECK(!has_pending_exception);
230 // The following test method stems from my coding efforts today. It
231 // tests all the functionality I have added to the compiler today
234 v8::HandleScope scope;
238 "if (a == a) r+=1;\n" // 1
239 "if (a != new Object()) r+=2;\n" // 2
241 "if (a.x == 42) r+=4;\n" // 4
242 "function foo() { var x = 87; return x; }\n"
243 "if (foo() == 87) r+=8;\n" // 8
244 "function bar() { var x; x = 99; return x; }\n"
245 "if (bar() == 99) r+=16;\n" // 16
246 "function baz() { var x = 1, y, z = 2; y = 3; return x + y + z; }\n"
247 "if (baz() == 6) r+=32;\n" // 32
248 "function Cons0() { this.x = 42; this.y = 87; }\n"
249 "if (new Cons0().x == 42) r+=64;\n" // 64
250 "if (new Cons0().y == 87) r+=128;\n" // 128
251 "function Cons2(x, y) { this.sum = x + y; }\n"
252 "if (new Cons2(3,4).sum == 7) r+=256;"; // 256
254 Handle<JSFunction> fun = Compile(source);
255 CHECK(!fun.is_null());
256 bool has_pending_exception;
257 Handle<JSObject> global(Isolate::Current()->context()->global());
258 Execution::Call(fun, global, 0, NULL, &has_pending_exception);
259 CHECK(!has_pending_exception);
260 CHECK_EQ(511.0, GetGlobalProperty("r")->ToObjectChecked()->Number());
264 TEST(UncaughtThrow) {
266 v8::HandleScope scope;
268 const char* source = "throw 42;";
269 Handle<JSFunction> fun = Compile(source);
270 CHECK(!fun.is_null());
271 bool has_pending_exception;
272 Handle<JSObject> global(Isolate::Current()->context()->global());
273 Execution::Call(fun, global, 0, NULL, &has_pending_exception);
274 CHECK(has_pending_exception);
275 CHECK_EQ(42.0, Isolate::Current()->pending_exception()->
276 ToObjectChecked()->Number());
280 // Tests calling a builtin function from C/C++ code, and the builtin function
281 // performs GC. It creates a stack frame looks like following:
288 v8::HandleScope scope;
290 const char* source = "function foo(a) { gc(), print(a); }";
292 Handle<JSFunction> fun0 = Compile(source);
293 CHECK(!fun0.is_null());
295 // Run the generated code to populate the global object with 'foo'.
296 bool has_pending_exception;
297 Handle<JSObject> global(Isolate::Current()->context()->global());
298 Execution::Call(fun0, global, 0, NULL, &has_pending_exception);
299 CHECK(!has_pending_exception);
301 Object* foo_symbol = FACTORY->LookupAsciiSymbol("foo")->ToObjectChecked();
302 MaybeObject* fun1_object = Isolate::Current()->context()->global()->
303 GetProperty(String::cast(foo_symbol));
304 Handle<Object> fun1(fun1_object->ToObjectChecked());
305 CHECK(fun1->IsJSFunction());
307 Handle<Object> argv[] = { FACTORY->LookupAsciiSymbol("hello") };
308 Execution::Call(Handle<JSFunction>::cast(fun1),
312 &has_pending_exception);
313 CHECK(!has_pending_exception);
317 // Regression 236. Calling InitLineEnds on a Script with undefined
318 // source resulted in crash.
319 TEST(Regression236) {
321 v8::HandleScope scope;
323 Handle<Script> script = FACTORY->NewScript(FACTORY->empty_string());
324 script->set_source(HEAP->undefined_value());
325 CHECK_EQ(-1, GetScriptLineNumber(script, 0));
326 CHECK_EQ(-1, GetScriptLineNumber(script, 100));
327 CHECK_EQ(-1, GetScriptLineNumber(script, -1));
331 TEST(GetScriptLineNumber) {
333 v8::HandleScope scope;
334 v8::ScriptOrigin origin = v8::ScriptOrigin(v8::String::New("test"));
335 const char function_f[] = "function f() {}";
336 const int max_rows = 1000;
337 const int buffer_size = max_rows + sizeof(function_f);
338 ScopedVector<char> buffer(buffer_size);
339 memset(buffer.start(), '\n', buffer_size - 1);
340 buffer[buffer_size - 1] = '\0';
342 for (int i = 0; i < max_rows; ++i) {
344 buffer[i - 1] = '\n';
345 memcpy(&buffer[i], function_f, sizeof(function_f) - 1);
346 v8::Handle<v8::String> script_body = v8::String::New(buffer.start());
347 v8::Script::Compile(script_body, &origin)->Run();
348 v8::Local<v8::Function> f = v8::Local<v8::Function>::Cast(
349 env->Global()->Get(v8::String::New("f")));
350 CHECK_EQ(i, f->GetScriptLineNumber());
355 #ifdef ENABLE_DISASSEMBLER
356 static Handle<JSFunction> GetJSFunction(v8::Handle<v8::Object> obj,
357 const char* property_name) {
358 v8::Local<v8::Function> fun =
359 v8::Local<v8::Function>::Cast(obj->Get(v8_str(property_name)));
360 return v8::Utils::OpenHandle(*fun);
364 static void CheckCodeForUnsafeLiteral(Handle<JSFunction> f) {
365 // Create a disassembler with default name lookup.
366 disasm::NameConverter name_converter;
367 disasm::Disassembler d(name_converter);
369 if (f->code()->kind() == Code::FUNCTION) {
370 Address pc = f->code()->instruction_start();
372 Min(f->code()->instruction_size(),
373 static_cast<int>(f->code()->stack_check_table_offset()));
374 Address end = pc + decode_size;
376 v8::internal::EmbeddedVector<char, 128> decode_buffer;
378 int num_const = d.ConstantPoolSizeAt(pc);
379 if (num_const >= 0) {
380 pc += (num_const + 1) * kPointerSize;
382 pc += d.InstructionDecode(decode_buffer, pc);
383 CHECK(strstr(decode_buffer.start(), "mov eax,0x178c29c") == NULL);
384 CHECK(strstr(decode_buffer.start(), "push 0x178c29c") == NULL);
385 CHECK(strstr(decode_buffer.start(), "0x178c29c") == NULL);
392 TEST(SplitConstantsInFullCompiler) {
393 v8::HandleScope scope;
396 CompileRun("function f() { a = 12345678 }; f();");
397 CheckCodeForUnsafeLiteral(GetJSFunction(env->Global(), "f"));
398 CompileRun("function f(x) { a = 12345678 + x}; f(1);");
399 CheckCodeForUnsafeLiteral(GetJSFunction(env->Global(), "f"));
400 CompileRun("function f(x) { var arguments = 1; x += 12345678}; f(1);");
401 CheckCodeForUnsafeLiteral(GetJSFunction(env->Global(), "f"));
402 CompileRun("function f(x) { var arguments = 1; x = 12345678}; f(1);");
403 CheckCodeForUnsafeLiteral(GetJSFunction(env->Global(), "f"));