Opended issue *HARMONY-2145<https://issues.apache.org/jira/browse/HARMONY-2145> * .
On 11/10/06, Eugene Ostrovsky <[EMAIL PROTECTED]> wrote:
Hello All. One more "hole" in current JVMTI Profiling implementation is Compiled Method Load event. Current VM doesn't report this event for methods that are inlined by JIT. Though spec requires it to be sent for every compiled method: http://java.sun.com/j2se/1.5.0/docs/guide/jvmti/jvmti.html#CompiledMethodLoad To support the feature VM need to know about those inlined methods. Right now I can see two possible approaches: 1. When VM initiates method compilation, it can ask the jit about methods that were inlined to compiled method and report all of them. 2. JIT itself can notify VM about every compiled method by calling some special interface function after the method compilation. I'm not sure about which approach is better. Each of them requires additional interface function (1.- to JIT from VM; 2. - from VM to JIT). The second approach seems to be more complicated in terms of VM - JIT interaction. I mean that the following scheme "VM calls JIT's function to compile method. -> JIT's function in it's turn calls VM's function to notify about compiled methods. -> VM's function dispatches the event to TI agents..." introduces additional level of complexity than if "VM calls JIT's function to compile method. VM asks JIT about inlined methods. VM dispatches event to TI agents." Ideas & suggestions are welcome. Thanks, Eugene. On 10/24/06, Eugene Ostrovsky < [EMAIL PROTECTED]> wrote: > > Hi all. > > It seems that we have most of JVMTI implemented in drlvm. Still some of > profiling support features is left. > I'm going to take a look on "VM Object Allocation" event. > I'll try to come up with design tomorrow. > > Thanks, > Eugene. > >
