Hi All,
This query was posted in v8-users earlier, but didn't attract any comments.
So, posting it here hoping to get a reply.
Does anyone know why the variable *debug_context_* is used?
This is created when DevTools passes *{"id":7,"method":"Debugger.enable"}*
to the back-end. This is the call-stack :
*v8.dll!v8::internal::Debug::Load() Line 471 C++*
* v8.dll!v8::internal::Debug::UpdateState() Line 2092 C++*
* v8.dll!v8::debug::SetDebugDelegate(v8::Isolate * v8_isolate,
v8::debug::DebugDelegate * delegate) Line 9641 C++*
* v8.dll!v8_inspector::V8Debugger::enable() Line 185 C++*
* v8.dll!v8_inspector::V8DebuggerAgentImpl::enableImpl() Line 210 C++*
* v8.dll!v8_inspector::V8DebuggerAgentImpl::enable() Line 228 C++*
* v8.dll!v8_inspector::protocol::Debugger::DispatcherImpl::enable(int
callId,
std::unique_ptr<v8_inspector::protocol::DictionaryValue,std::default_delete<v8_inspector::protocol::DictionaryValue>
> requestMessageObject, v8_inspector::protocol::ErrorSupport * errors) Line
899 C++*
* v8.dll!v8_inspector::protocol::Debugger::DispatcherImpl::dispatch(int
callId, const v8_inspector::String16 & method,
std::unique_ptr<v8_inspector::protocol::DictionaryValue,std::default_delete<v8_inspector::protocol::DictionaryValue>
> messageObject) Line 890 C++*
*
v8.dll!v8_inspector::protocol::UberDispatcher::dispatch(std::unique_ptr<v8_inspector::protocol::Value,std::default_delete<v8_inspector::protocol::Value>
> parsedMessage) Line 813 C++*
*
v8.dll!v8_inspector::V8InspectorSessionImpl::dispatchProtocolMessage(const
v8_inspector::StringView & message) Line 343 C++*
*> SendDebugCommand::__l2::<lambda>(bool & flag) Line 192 C++*
* [External Code] *
* ProcessQueue() Line 149 C++*
* [External Code] *
Already I have entered my local context scope when the json command is sent
to v8_inspector. Most of the time, the context creation above is success
and everything works fine. But sometimes, the stack overflow check for the
isolate fails inside *v8.dll!v8::internal::Genesis::Genesis()*, which fails
to update *m_debuggerContext *variable in
*v8.dll!v8_inspector::V8Debugger::enable()* and crashes with c0000005 when
it tries to enter into scope of a null context in function
*v8.dll!v8_inspector::V8Debugger::compileDebuggerScript()* and makes my
application crash.
This behaviour is sporadic. Sometimes the debugger works fine for hours
before crashing, sometimes it works for 2-3 invocations and fails. Does
anyone has any idea on this behaviour? Please reply if more details are
needed.
Thanks,
Anoop R. S.
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