在V8中为什么Isolate :: GetCurrent()返回NULL? [英] In V8 why does Isolate::GetCurrent() return NULL?
问题描述
我在Ubuntu上编译了 V8 ,并且有一个非常简单的V8程序,名为isolate_test.cc 。它基于 Google的Hello World示例:
I have compiled V8 on Ubuntu and have a very simple V8 program called isolate_test.cc. It is based on the Hello World example from Google:
#include <v8.h>
using namespace v8;
int main(int argc, char* argv[]) {
V8::initialize();
Isolate* isolate = Isolate::GetCurrent(); //Always returns NULL
return 0;
}
我用来编译此程序的命令是:
The command I use to compile this program is:
g++ -Iinclude -g isolate_test.cc -o isolate_test -Wl,--start-group out/x64.debug/obj.target/{tools/gyp/libv8_{base,snapshot},third_party/icu/libicu{uc,i18n,data}}.a -Wl,--end-group -lrt -lpthread
问题是 Isolate :: GetCurrent()
返回 NULL
。为什么会发生这种情况,获得当前 Isolate
的正确方法是什么?
Problem is Isolate::GetCurrent()
always returns NULL
. Why does this happen and what is the correct way of getting the current Isolate
?
我可以离开轨道,但我的第一个想法是这涉及到 Isolate :: GetCurrent()
无法从 libpthread
获取当前线程。
I could be way off track but my first thought is that this relates to Isolate::GetCurrent()
being unable to get the current thread from libpthread
.
更新:根据这个问题我添加了 V8 :: initialize()
作为程序中的第一个调用,但是这不是解决问题。
Update: As per this question I have added V8::initialize()
as the first call in the program, however this does not solve the problem.
推荐答案
我有同样的问题。我真的不知道底层的原因,但这里的NULL表示未创建并输入默认隔离。显而易见的解决方法是手动执行
I have the same issue. I don't really know the underlying reason, but NULL here means default isolate was not created and entered. The obvious workaround is to do it manually
Isolate* isolate = Isolate::GetCurrent(); // returns NULL
if (!isolate) {
isolate = Isolate::New();
isolate->Enter();
}
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