void JvmtiBreakpoint::each_method_version_do(method_action meth_act) {
((Method*)_method->*meth_act)(_bci);
// add/remove breakpoint to/from versions of the method that
// are EMCP. Directly or transitively obsolete methods are
// not saved in the PreviousVersionNodes.
Thread *thread = Thread::current();
instanceKlassHandle ikh = instanceKlassHandle(thread, _method->method_holder());
Symbol* m_name = _method->name();
Symbol* m_signature = _method->signature();
// search previous versions if they exist
PreviousVersionWalker pvw(thread, (InstanceKlass *)ikh());
for (PreviousVersionNode * pv_node = pvw.next_previous_version();
pv_node != NULL; pv_node = pvw.next_previous_version()) {
GrowableArray<Method*>* methods = pv_node->prev_EMCP_methods();
if (methods == NULL) {
// We have run into a PreviousVersion generation where
// all methods were made obsolete during that generation's
// RedefineClasses() operation. At the time of that
// operation, all EMCP methods were flushed so we don't
// have to go back any further.
//
// A NULL methods array is different than an empty methods
// array. We cannot infer any optimizations about older
// generations from an empty methods array for the current
// generation.
break;
}
for (int i = methods->length() - 1; i >= 0; i--) {
Method* method = methods->at(i);
// obsolete methods that are running are not deleted from
// previous version array, but they are skipped here.
if (!method->is_obsolete() &&
method->name() == m_name &&
method->signature() == m_signature) {
RC_TRACE(0x00000800, ("%sing breakpoint in %s(%s)",
meth_act == &Method::set_breakpoint ? "sett" : "clear",
method->name()->as_C_string(),
method->signature()->as_C_string()));
(method->*meth_act)(_bci);
break;
}
}
}
}
