Don`t use references to JsEngine to avoid use-after-free errors,switch to shared_ptr instead

test/JsValue.cpp

 #include <AdblockPlus.h>
 #include <gtest/gtest.h>
 
 TEST(JsValueTest, UndefinedValue)
 {
-  AdblockPlus::JsEngine jsEngine;
-  AdblockPlus::JsValuePtr value = jsEngine.Evaluate("undefined");
+  AdblockPlus::JsEnginePtr jsEngine(AdblockPlus::JsEngine::New());
+  AdblockPlus::JsValuePtr value = jsEngine->Evaluate("undefined");
   ASSERT_TRUE(value->IsUndefined());
   ASSERT_FALSE(value->IsNull());
   ASSERT_FALSE(value->IsString());
   ASSERT_FALSE(value->IsBool());
   ASSERT_FALSE(value->IsNumber());
   ASSERT_FALSE(value->IsObject());
   ASSERT_FALSE(value->IsArray());
   ASSERT_FALSE(value->IsFunction());
   ASSERT_EQ("undefined", value->AsString());
   ASSERT_FALSE(value->AsBool());
   ASSERT_ANY_THROW(value->AsList());
   ASSERT_ANY_THROW(value->GetProperty("foo"));
   ASSERT_ANY_THROW(value->SetProperty("foo", false));
   ASSERT_ANY_THROW(value->GetClassName());
   ASSERT_ANY_THROW(value->GetOwnPropertyNames());
   ASSERT_ANY_THROW(value->Call());
 }
 
 TEST(JsValueTest, NullValue)
 {
-  AdblockPlus::JsEngine jsEngine;
-  AdblockPlus::JsValuePtr value = jsEngine.Evaluate("null");
+  AdblockPlus::JsEnginePtr jsEngine(AdblockPlus::JsEngine::New());
+  AdblockPlus::JsValuePtr value = jsEngine->Evaluate("null");
   ASSERT_FALSE(value->IsUndefined());
   ASSERT_TRUE(value->IsNull());
   ASSERT_FALSE(value->IsString());
   ASSERT_FALSE(value->IsBool());
   ASSERT_FALSE(value->IsNumber());
   ASSERT_FALSE(value->IsObject());
   ASSERT_FALSE(value->IsArray());
   ASSERT_FALSE(value->IsFunction());
   ASSERT_EQ("null", value->AsString());
   ASSERT_FALSE(value->AsBool());
   ASSERT_ANY_THROW(value->AsList());
   ASSERT_ANY_THROW(value->GetProperty("foo"));
   ASSERT_ANY_THROW(value->SetProperty("foo", false));
   ASSERT_ANY_THROW(value->GetClassName());
   ASSERT_ANY_THROW(value->GetOwnPropertyNames());
   ASSERT_ANY_THROW(value->Call());
 }
 
 TEST(JsValueTest, StringValue)
 {
-  AdblockPlus::JsEngine jsEngine;
-  AdblockPlus::JsValuePtr value = jsEngine.Evaluate("'123'");
+  AdblockPlus::JsEnginePtr jsEngine(AdblockPlus::JsEngine::New());
+  AdblockPlus::JsValuePtr value = jsEngine->Evaluate("'123'");
   ASSERT_FALSE(value->IsUndefined());
   ASSERT_FALSE(value->IsNull());
   ASSERT_TRUE(value->IsString());
   ASSERT_FALSE(value->IsBool());
   ASSERT_FALSE(value->IsNumber());
   ASSERT_FALSE(value->IsObject());
   ASSERT_FALSE(value->IsArray());
   ASSERT_FALSE(value->IsFunction());
   ASSERT_EQ("123", value->AsString());
   ASSERT_EQ(123, value->AsInt());
   ASSERT_TRUE(value->AsBool());
   ASSERT_ANY_THROW(value->AsList());
   ASSERT_ANY_THROW(value->GetProperty("foo"));
   ASSERT_ANY_THROW(value->SetProperty("foo", false));
   ASSERT_ANY_THROW(value->GetClassName());
   ASSERT_ANY_THROW(value->GetOwnPropertyNames());
   ASSERT_ANY_THROW(value->Call());
 }
 
 TEST(JsValueTest, IntValue)
 {
-  AdblockPlus::JsEngine jsEngine;
-  AdblockPlus::JsValuePtr value = jsEngine.Evaluate("123");
+  AdblockPlus::JsEnginePtr jsEngine(AdblockPlus::JsEngine::New());
+  AdblockPlus::JsValuePtr value = jsEngine->Evaluate("123");
   ASSERT_FALSE(value->IsUndefined());
   ASSERT_FALSE(value->IsNull());
   ASSERT_FALSE(value->IsString());
   ASSERT_FALSE(value->IsBool());
   ASSERT_TRUE(value->IsNumber());
   ASSERT_FALSE(value->IsObject());
   ASSERT_FALSE(value->IsArray());
   ASSERT_FALSE(value->IsFunction());
   ASSERT_EQ("123", value->AsString());
   ASSERT_EQ(123, value->AsInt());
   ASSERT_TRUE(value->AsBool());
   ASSERT_ANY_THROW(value->AsList());
   ASSERT_ANY_THROW(value->GetProperty("foo"));
   ASSERT_ANY_THROW(value->SetProperty("foo", false));
   ASSERT_ANY_THROW(value->GetClassName());
   ASSERT_ANY_THROW(value->GetOwnPropertyNames());
   ASSERT_ANY_THROW(value->Call());
 }
 
 TEST(JsValueTest, BoolValue)
 {
-  AdblockPlus::JsEngine jsEngine;
-  AdblockPlus::JsValuePtr value = jsEngine.Evaluate("true");
+  AdblockPlus::JsEnginePtr jsEngine(AdblockPlus::JsEngine::New());
+  AdblockPlus::JsValuePtr value = jsEngine->Evaluate("true");
   ASSERT_FALSE(value->IsUndefined());
   ASSERT_FALSE(value->IsNull());
   ASSERT_FALSE(value->IsString());
   ASSERT_TRUE(value->IsBool());
   ASSERT_FALSE(value->IsNumber());
   ASSERT_FALSE(value->IsObject());
   ASSERT_FALSE(value->IsArray());
   ASSERT_FALSE(value->IsFunction());
   ASSERT_EQ("true", value->AsString());
   ASSERT_TRUE(value->AsBool());
   ASSERT_ANY_THROW(value->AsList());
   ASSERT_ANY_THROW(value->GetProperty("foo"));
   ASSERT_ANY_THROW(value->SetProperty("foo", false));
   ASSERT_ANY_THROW(value->GetClassName());
   ASSERT_ANY_THROW(value->GetOwnPropertyNames());
   ASSERT_ANY_THROW(value->Call());
 }
 
 TEST(JsValueTest, ObjectValue)
 {
-  AdblockPlus::JsEngine jsEngine;
+  AdblockPlus::JsEnginePtr jsEngine(AdblockPlus::JsEngine::New());
   const std::string source("\
     function Foo() {\
       this.x = 2;\
       this.toString = function() {return 'foo';};\
       this.valueOf = function() {return 123;};\
     };\
     new Foo()");
-  AdblockPlus::JsValuePtr value = jsEngine.Evaluate(source);
+  AdblockPlus::JsValuePtr value = jsEngine->Evaluate(source);
   ASSERT_FALSE(value->IsUndefined());
   ASSERT_FALSE(value->IsNull());
   ASSERT_FALSE(value->IsString());
   ASSERT_FALSE(value->IsBool());
   ASSERT_FALSE(value->IsNumber());
   ASSERT_TRUE(value->IsObject());
   ASSERT_FALSE(value->IsArray());
   ASSERT_FALSE(value->IsFunction());
   ASSERT_EQ("foo", value->AsString());
   ASSERT_EQ(123, value->AsInt());
   ASSERT_TRUE(value->AsBool());
   ASSERT_ANY_THROW(value->AsList());
   ASSERT_EQ(2, value->GetProperty("x")->AsInt());
   value->SetProperty("x", 12);
   ASSERT_EQ(12, value->GetProperty("x")->AsInt());
-  value->SetProperty("x", jsEngine.NewValue(15));
+  value->SetProperty("x", jsEngine->NewValue(15));
   ASSERT_EQ(15, value->GetProperty("x")->AsInt());
   ASSERT_EQ("Foo", value->GetClassName());
   ASSERT_EQ(3u, value->GetOwnPropertyNames().size());
   ASSERT_ANY_THROW(value->Call());
 }
 
 TEST(JsValueTest, ArrayValue)
 {
-  AdblockPlus::JsEngine jsEngine;
-  AdblockPlus::JsValuePtr value = jsEngine.Evaluate("[5,8,12]");
+  AdblockPlus::JsEnginePtr jsEngine(AdblockPlus::JsEngine::New());
+  AdblockPlus::JsValuePtr value = jsEngine->Evaluate("[5,8,12]");
   ASSERT_FALSE(value->IsUndefined());
   ASSERT_FALSE(value->IsNull());
   ASSERT_FALSE(value->IsString());
   ASSERT_FALSE(value->IsBool());
   ASSERT_FALSE(value->IsNumber());
   ASSERT_TRUE(value->IsObject());
   ASSERT_TRUE(value->IsArray());
   ASSERT_FALSE(value->IsFunction());
   ASSERT_EQ("5,8,12", value->AsString());
   ASSERT_TRUE(value->AsBool());
   ASSERT_EQ(3u, value->AsList().size());
   ASSERT_EQ(8, value->AsList()[1]->AsInt());
   ASSERT_EQ(3, value->GetProperty("length")->AsInt());
   ASSERT_EQ("Array", value->GetClassName());
   ASSERT_ANY_THROW(value->Call());
 }
 
 TEST(JsValueTest, FunctionValue)
 {
-  AdblockPlus::JsEngine jsEngine;
-  AdblockPlus::JsValuePtr value = jsEngine.Evaluate("(function(foo, bar) {return this.x + '/' + foo + '/' + bar;})");
+  AdblockPlus::JsEnginePtr jsEngine(AdblockPlus::JsEngine::New());
+  AdblockPlus::JsValuePtr value = jsEngine->Evaluate("(function(foo, bar) {return this.x + '/' + foo + '/' + bar;})");
   ASSERT_FALSE(value->IsUndefined());
   ASSERT_FALSE(value->IsNull());
   ASSERT_FALSE(value->IsString());
   ASSERT_FALSE(value->IsBool());
   ASSERT_FALSE(value->IsNumber());
   ASSERT_TRUE(value->IsObject());
   ASSERT_FALSE(value->IsArray());
   ASSERT_TRUE(value->IsFunction());
   ASSERT_TRUE(value->AsBool());
   ASSERT_ANY_THROW(value->AsList());
   ASSERT_EQ(2, value->GetProperty("length")->AsInt());
 
-  AdblockPlus::JsValuePtr thisPtr = jsEngine.Evaluate("({x:2})");
+  AdblockPlus::JsValuePtr thisPtr = jsEngine->Evaluate("({x:2})");
   AdblockPlus::JsValueList params;
-  params.push_back(jsEngine.NewValue(5));
-  params.push_back(jsEngine.NewValue("xyz"));
+  params.push_back(jsEngine->NewValue(5));
+  params.push_back(jsEngine->NewValue("xyz"));
   ASSERT_EQ("2/5/xyz", value->Call(params, thisPtr)->AsString());
 }
 
 TEST(JsValueTest, ThrowingCoversion)
 {
-  AdblockPlus::JsEngine jsEngine;
+  AdblockPlus::JsEnginePtr jsEngine(AdblockPlus::JsEngine::New());
   const std::string source("\
     function Foo() {\
       this.toString = function() {throw 'test1';};\
       this.valueOf = function() {throw 'test2';};\
     };\
     new Foo()");
-  AdblockPlus::JsValuePtr value = jsEngine.Evaluate(source);
+  AdblockPlus::JsValuePtr value = jsEngine->Evaluate(source);
   ASSERT_EQ("", value->AsString());
   ASSERT_EQ(0, value->AsInt());
 }