On Fri, Jan 8, 2016 at 2:43 PM, juu <[email protected]> wrote: > Hi everyone, > > I am having some issues while trying to implement a "wait for debugger" > feature on my debugger client connection. I want to allow my user to have > its script execution paused until he connect his debugger client to v8. > > I am trying to do this by calling v8::Debug::DebugBreak before my Script > runs (that's how the former v8::Debug::EnableAgent use to do this). My > application is multi-threaded, so each v8 API call use a v8::Locker to be > thread safe. > > So my use case could be summarized as : > > //... > > v8::Debug::DebugBreak(); > > StartMyDebuggerListenerThread(); > > { > v8::Locker lock(my_isolate); > myScript->Run() > } > > //... > > > My problem is that the DebugBreak function sets some interruption flags on > the local thread (to trigger the break when possible I guess). > See execution.cc StackGuard::RequestInterrupt(int flagbit) > > But the locker clears this flag, while it's being initialized. > See v8threads.cc Locker::Initialize(V8::Isolate* isolate), during the > RestoreThread() call > > > So whenever I try to trigger a break, it's cancelled by the next Locker I > hit. Am I doing something wrong ? I am using v8 3.27.34.20 could this be > related to my version, and be fixed in the next ones ? (From what I see, I > does not seem to change in the last version)
Tip of tree indeed seems to have the same behavior. I'd file a bug: https://bugs.chromium.org/p/v8/issues/list > Another quick question, how does v8 trigger this break (performed by > v8::Debug::DebugBreak() ) ? Is this done automatically ? or do I have to > call v8::Debug::ProcessDebugMessage to process it like a DebugCommand ? V8 inserts checks in the generated code, in the function prologue/epilogue and around loop edges (IIRC). You don't have to do anything except wait for a few microseconds; eventually your debug listener gets called. -- -- v8-users mailing list [email protected] http://groups.google.com/group/v8-users --- You received this message because you are subscribed to the Google Groups "v8-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
