void NonTieredCompPolicy::trace_frequency_counter_overflow(methodHandle m, int branch_bci, int bci) {
if (TraceInvocationCounterOverflow) {
InvocationCounter* ic = m->invocation_counter();
InvocationCounter* bc = m->backedge_counter();
ResourceMark rm;
const char* msg =
bci == InvocationEntryBci
? "comp-policy cntr ovfl @ %d in entry of "
: "comp-policy cntr ovfl @ %d in loop of ";
tty->print(msg, bci);
m->print_value();
tty->cr();
ic->print();
bc->print();
if (ProfileInterpreter) {
if (bci != InvocationEntryBci) {
methodDataOop mdo = m->method_data();
if (mdo != NULL) {
int count = mdo->bci_to_data(branch_bci)->as_JumpData()->taken();
tty->print_cr("back branch count = %d", count);
}
}
}
}
}
void NonTieredCompPolicy::reset_counter_for_invocation_event(methodHandle m) {
// Make sure invocation and backedge counter doesn't overflow again right away
// as would be the case for native methods.
// BUT also make sure the method doesn't look like it was never executed.
// Set carry bit and reduce counter's value to min(count, CompileThreshold/2).
m->invocation_counter()->set_carry();
m->backedge_counter()->set_carry();
assert(!m->was_never_executed(), "don't reset to 0 -- could be mistaken for never-executed");
}
void NonTieredCompPolicy::reset_counter_for_back_branch_event(methodHandle m) {
// Delay next back-branch event but pump up invocation counter to triger
// whole method compilation.
InvocationCounter* i = m->invocation_counter();
InvocationCounter* b = m->backedge_counter();
// Don't set invocation_counter's value too low otherwise the method will
// look like immature (ic < ~5300) which prevents the inlining based on
// the type profiling.
i->set(i->state(), CompileThreshold);
// Don't reset counter too low - it is used to check if OSR method is ready.
b->set(b->state(), CompileThreshold / 2);
}
static address do_decay(methodHandle method, TRAPS) {
// decay invocation counters so compilation gets delayed
method->invocation_counter()->decay();
return NULL;
}
static address do_nothing(methodHandle method, TRAPS) {
// dummy action for inactive invocation counters
method->invocation_counter()->set_carry();
method->invocation_counter()->set_state(InvocationCounter::wait_for_nothing);
return NULL;
}