假设我有这段代码:
Local<Script> script = Script::Compile(String::New("x1 = 1;"), String::New("main.js"));
printf("before run\n");
script->Run();
printf("after run\n");
上下文是之前创建和输入的。
此代码的输出是:
before run
after run
这是预期的。但是,如果将一些 javascript 代码放入包含语法错误(例如,".x11 = 1"
)的 source
中,则输出为:
main.js:0: Uncaught SyntaxError: Unexpected token .
before execution.
Segmentation fault (core dumped)
如果编译有错误,也许我不应该调用 Run
但如何检查呢?
此外:(来自 Getting Starget - Chrome V8 的代码 + 有语法错误的代码 = 同样的东西)
#include <v8.h>
using namespace v8;
int main(int argc, char* argv[]) {
// Get the default Isolate created at startup.
Isolate* isolate = Isolate::GetCurrent();
// Create a stack-allocated handle scope.
HandleScope handle_scope(isolate);
// Create a new context.
Handle<Context> context = Context::New(isolate);
// Here's how you could create a Persistent handle to the context, if needed.
Persistent<Context> persistent_context(isolate, context);
// Enter the created context for compiling and
// running the hello world script.
Context::Scope context_scope(context);
// Create a string containing the JavaScript source code.
Handle<String> source = String::New(".>make.some.syntax.errors<");
// Compile the source code.
Handle<Script> script = Script::Compile(source);
// Run the script to get the result.
Handle<Value> result = script->Run();
// The persistent handle needs to be eventually disposed.
persistent_context.Dispose();
// Convert the result to an ASCII string and print it.
String::AsciiValue ascii(result);
printf("%s\n", *ascii);
return 0;
}
最佳答案
经过一段时间的头痛之后,我找到了解决方法。
当脚本编译失败时,它不会向 v8::Handle
返回任何内容。因此,在这种情况下,script.IsEmpty()
返回 true。
为了明确这一点,我对 Google 的 Hello World 代码进行了一些修改:
#include <v8.h>
using namespace v8;
int main(int argc, char* argv[]) {
// Get the default Isolate created at startup.
Isolate* isolate = Isolate::GetCurrent();
// Create a stack-allocated handle scope.
HandleScope handle_scope(isolate);
// Create a new context.
Handle<Context> context = Context::New(isolate);
// Here's how you could create a Persistent handle to the context, if needed.
Persistent<Context> persistent_context(isolate, context);
// Enter the created context for compiling and
// running the hello world script.
Context::Scope context_scope(context);
// Create a string containing the JavaScript source code.
Handle<String> source = String::New(".>no.matter.what.code.is<");
// Compile the source code.
Handle<Script> script = Script::Compile(source);
if(!script.IsEmpty()) // is script compiled ?
{
// Run the script to get the result.
Handle<Value> result = script->Run();
// Convert the result to an ASCII string and print it.
String::AsciiValue ascii(result);
printf("%s\n", *ascii);
}
// The persistent handle needs to be eventually disposed.
persistent_context.Dispose();
return 0;
}
关于c++ - v8::Script::Compile(v8::String::New (".make.some.syntax.errors"), v8::String::New ("main"))->Run() 导致段错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/19619554/