Hey.
I am getting somewhat confused currently. So, I have been trying out how to
properly dispose an isolate. But whatever I try, I get an error. If I dispose
the isolate, I get
#
# Fatal error in ../../deps/v8/src/isolate.h, line 456
# CHECK(isolate != __null) failed
#
But if I dont do that, then...
FATAL ERROR: v8::V8::Dispose() Use v8::Isolate::Dispose() for non-default
isolate.
Abort trap: 6
I am gonna try to sumarize the code I am working with:
// -> main
v8::Isolate* isl = v8::Isolate::New();
isl->Enter();
node::Start(Args.arg_c, Args.arg_v);
// -> node::Start
int code;
V8::Initialize();
{
Locker locker(node_isolate);
Environment* env =
CreateEnvironment(node_isolate, argc, argv, exec_argc, exec_argv);
// This Context::Scope is here so EnableDebug() can look up the current
// environment with Environment::GetCurrentChecked().
// TODO(bnoordhuis) Reorder the debugger initialization logic so it can
// be removed.
{
Context::Scope context_scope(env->context());
bool more;
do {
more = uv_run(env->event_loop(), UV_RUN_ONCE);
if (more == false) {
EmitBeforeExit(env);
// Emit `beforeExit` if the loop became alive either after emitting
// event, or after running some callbacks.
more = uv_loop_alive(env->event_loop());
if (uv_run(env->event_loop(), UV_RUN_NOWAIT) != 0)
more = true;
}
} while (more == true);
code = EmitExit(env);
RunAtExit(env);
}
env->Dispose();
env = NULL;
}
// -> back to main
v8::V8::Dispose();
Environment holds a pointer to the v8::Isolate. the Dispose() method is quite
simple:
Environment::Dispose() {
delete this;
}
So what is going wrong here o-o? I am loosing a bit of an overview right now.
Kind regards, Ingwie
Am 26.03.2014 um 08:36 schrieb Ben Noordhuis <[email protected]>:
> On Wed, Mar 26, 2014 at 1:05 AM, Kevin Ingwersen
> <[email protected]> wrote:
>> Hey.
>>
>> When I create a custom isolate, and then call V8::Dispose(), I get a big
>> error:
>>
>> #
>> # Fatal error in ../../deps/v8/src/isolate.h, line 456
>> # CHECK(isolate != __null) failed
>> #
>>
>> ==== C stack trace ===============================
>>
>> 1: ??
>> 2: ??
>> 3: ??
>> 4: ??
>> 5: ??
>> 6: ??
>> 7: ??
>> 8: ??
>> Process 24211 stopped
>> * thread #2: tid = 0x3d7156, 0x0000000100836755
>> node`v8::internal::OS::DebugBreak() + 5 at platform-posix.cc:294, stop
>> reason = EXC_BREAKPOINT (code=EXC_I386_BPT, subcode=0x0)
>> frame #0: 0x0000000100836755 node`v8::internal::OS::DebugBreak() + 5 at
>> platform-posix.cc:294
>> 291 #else
>> 292 #error Unsupported host architecture.
>> 293 #endif
>> -> 294 }
>> 295
>> 296
>> 297 //
>> ----------------------------------------------------------------------------
>>
>> I am initializing my isolate with:
>>
>> v8::Isolate *isl = v8::Isolate::New();
>> isl->Enter();
>>
>> Then the code runs, and at the bottom:
>>
>> node_isolate->Exit();
>> node_isolate->Dispose();
>>
>> A while after is the V8::Dispose(). When i comment this call out, the
>> programm exits just as I expected. Otherwise, it crashes with the posted
>> bunch above. What is the reason for this?
>>
>> Kind regards, Ingwie.
>
> There is still something that uses the isolate. Make sure you use
> proper scoping in your C++ code, i.e.:
>
> CHECK(V8::Initialize() == true);
> Isolate* isolate = Isolate::New();
> {
> Isolate::Scope isolate_scope(isolate);
> HandleScope handle_scope(isolate);
> Local<Context> = Context::New(...);
> CHECK(context.IsEmpty() == false);
> {
> Context::Scope context_scope(context);
> // etc.
> }
> }
> CHECK(V8::Dispose() == true);
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