/**
* Check whether profiling provides a type for the argument i to the
* call at bci bci
*
* @param bci bci of the call
* @param i argument number
* @return profiled type
*
* If the profile reports that the argument may be null, return false
* at least for now.
*/
ciKlass* ciMethod::argument_profiled_type(int bci, int i) {
if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
ciProfileData* data = method_data()->bci_to_data(bci);
if (data != NULL) {
if (data->is_VirtualCallTypeData()) {
assert_virtual_call_type_ok(bci);
ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
if (i >= call->number_of_arguments()) {
return NULL;
}
ciKlass* type = call->valid_argument_type(i);
if (type != NULL && !call->argument_maybe_null(i)) {
return type;
}
} else if (data->is_CallTypeData()) {
assert_call_type_ok(bci);
ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
if (i >= call->number_of_arguments()) {
return NULL;
}
ciKlass* type = call->valid_argument_type(i);
if (type != NULL && !call->argument_maybe_null(i)) {
return type;
}
}
}
}
return NULL;
}
// ------------------------------------------------------------------
// ciMethod::call_profile_at_bci
//
// Get the ciCallProfile for the invocation of this method.
// Also reports receiver types for non-call type checks (if TypeProfileCasts).
ciCallProfile ciMethod::call_profile_at_bci(int bci) {
ResourceMark rm;
ciCallProfile result;
if (method_data() != NULL && method_data()->is_mature()) {
ciProfileData* data = method_data()->bci_to_data(bci);
if (data != NULL && data->is_CounterData()) {
// Every profiled call site has a counter.
int count = data->as_CounterData()->count();
if (!data->is_ReceiverTypeData()) {
result._receiver_count[0] = 0; // that's a definite zero
} else { // ReceiverTypeData is a subclass of CounterData
ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData();
// In addition, virtual call sites have receiver type information
int receivers_count_total = 0;
int morphism = 0;
for (uint i = 0; i < call->row_limit(); i++) {
ciKlass* receiver = call->receiver(i);
if (receiver == NULL) continue;
morphism += 1;
int rcount = call->receiver_count(i);
if (rcount == 0) rcount = 1; // Should be valid value
receivers_count_total += rcount;
// Add the receiver to result data.
result.add_receiver(receiver, rcount);
// If we extend profiling to record methods,
// we will set result._method also.
}
// Determine call site's morphism.
// The call site count is 0 with known morphism (onlt 1 or 2 receivers)
// or < 0 in the case of a type check failured for checkcast, aastore, instanceof.
// The call site count is > 0 in the case of a polymorphic virtual call.
if (morphism > 0 && morphism == result._limit) {
// The morphism <= MorphismLimit.
if ((morphism < ciCallProfile::MorphismLimit) ||
(morphism == ciCallProfile::MorphismLimit && count == 0)) {
#ifdef ASSERT
if (count > 0) {
this->print_short_name(tty);
tty->print_cr(" @ bci:%d", bci);
this->print_codes();
assert(false, "this call site should not be polymorphic");
}
#endif
result._morphism = morphism;
}
}
// Make the count consistent if this is a call profile. If count is
// zero or less, presume that this is a typecheck profile and
// do nothing. Otherwise, increase count to be the sum of all
// receiver's counts.
if (count >= 0) {
count += receivers_count_total;
}
}
result._count = count;
}
}
return result;
}
// ------------------------------------------------------------------
// ciMethod::call_profile_at_bci
//
// Get the ciCallProfile for the invocation of this method.
// Also reports receiver types for non-call type checks (if TypeProfileCasts).
ciCallProfile ciMethod::call_profile_at_bci(int bci) {
ResourceMark rm;
ciCallProfile result;
if (method_data() != NULL && method_data()->is_mature()) {
ciProfileData* data = method_data()->bci_to_data(bci);
if (data != NULL && data->is_CounterData()) {
// Every profiled call site has a counter.
int count = data->as_CounterData()->count();
if (!data->is_ReceiverTypeData()) {
result._receiver_count[0] = 0; // that's a definite zero
} else { // ReceiverTypeData is a subclass of CounterData
ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData();
// In addition, virtual call sites have receiver type information
int receivers_count_total = 0;
int morphism = 0;
for (uint i = 0; i < call->row_limit(); i++) {
ciKlass* receiver = call->receiver(i);
if (receiver == NULL) continue;
morphism += 1;
int rcount = call->receiver_count(i);
if (rcount == 0) rcount = 1; // Should be valid value
receivers_count_total += rcount;
// Add the receiver to result data.
result.add_receiver(receiver, rcount);
// If we extend profiling to record methods,
// we will set result._method also.
}
// Determine call site's morphism.
// The call site count could be == (receivers_count_total + 1)
// not only in the case of a polymorphic call but also in the case
// when a method data snapshot is taken after the site count was updated
// but before receivers counters were updated.
if (morphism == result._limit) {
// There were no array klasses and morphism <= MorphismLimit.
if (morphism < ciCallProfile::MorphismLimit ||
morphism == ciCallProfile::MorphismLimit &&
(receivers_count_total+1) >= count) {
result._morphism = morphism;
}
}
// Make the count consistent if this is a call profile. If count is
// zero or less, presume that this is a typecheck profile and
// do nothing. Otherwise, increase count to be the sum of all
// receiver's counts.
if (count > 0) {
if (count < receivers_count_total) {
count = receivers_count_total;
}
}
}
result._count = count;
}
}
return result;
}
// ------------------------------------------------------------------
// ciMethod::interpreter_call_site_count
int ciMethod::interpreter_call_site_count(int bci) {
if (method_data() != NULL) {
ResourceMark rm;
ciProfileData* data = method_data()->bci_to_data(bci);
if (data != NULL && data->is_CounterData()) {
return scale_count(data->as_CounterData()->count());
}
}
return -1; // unknown
}
/**
* Check whether profiling provides a type for the parameter i
*
* @param [in]i parameter number
* @param [out]type profiled type of parameter, NULL if none
* @param [out]maybe_null true if null was seen for parameter
* @return true if profiling exists
*
*/
bool ciMethod::parameter_profiled_type(int i, ciKlass*& type, bool& maybe_null) {
if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
ciParametersTypeData* parameters = method_data()->parameters_type_data();
if (parameters != NULL && i < parameters->number_of_parameters()) {
type = parameters->valid_parameter_type(i);
maybe_null = parameters->parameter_maybe_null(i);
return true;
}
}
return false;
}
/**
* Check whether profiling provides a type for the parameter i
*
* @param i parameter number
* @return profiled type
*
* If the profile reports that the argument may be null, return false
* at least for now.
*/
ciKlass* ciMethod::parameter_profiled_type(int i) {
if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
ciParametersTypeData* parameters = method_data()->parameters_type_data();
if (parameters != NULL && i < parameters->number_of_parameters()) {
ciKlass* type = parameters->valid_parameter_type(i);
if (type != NULL && !parameters->parameter_maybe_null(i)) {
return type;
}
}
}
return NULL;
}
// ------------------------------------------------------------------
// Adjust a CounterData count to be commensurate with
// interpreter_invocation_count. If the MDO exists for
// only 25% of the time the method exists, then the
// counts in the MDO should be scaled by 4X, so that
// they can be usefully and stably compared against the
// invocation counts in methods.
int ciMethod::scale_count(int count, float prof_factor) {
if (count > 0 && method_data() != NULL) {
int current_mileage = method_data()->current_mileage();
int creation_mileage = method_data()->creation_mileage();
int counter_life = current_mileage - creation_mileage;
int method_life = interpreter_invocation_count();
// counter_life due to backedge_counter could be > method_life
if (counter_life > method_life)
counter_life = method_life;
if (0 < counter_life && counter_life <= method_life) {
count = (int)((double)count * prof_factor * method_life / counter_life + 0.5);
count = (count > 0) ? count : 1;
}
}
return count;
}
/**
* Check whether profiling provides a type for the return value from
* the call at bci bci
*
* @param [in]bci bci of the call
* @param [out]type profiled type of argument, NULL if none
* @param [out]maybe_null true if null was seen for argument
* @return true if profiling exists
*
*/
bool ciMethod::return_profiled_type(int bci, ciKlass*& type, bool& maybe_null) {
if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) {
ciProfileData* data = method_data()->bci_to_data(bci);
if (data != NULL) {
if (data->is_VirtualCallTypeData()) {
assert_virtual_call_type_ok(bci);
ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
type = call->valid_return_type();
maybe_null = call->return_maybe_null();
return true;
} else if (data->is_CallTypeData()) {
assert_call_type_ok(bci);
ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
type = call->valid_return_type();
maybe_null = call->return_maybe_null();
return true;
}
}
}
return false;
}
// ------------------------------------------------------------------
// Adjust a CounterData count to be commensurate with
// interpreter_invocation_count. If the MDO exists for
// only 25% of the time the method exists, then the
// counts in the MDO should be scaled by 4X, so that
// they can be usefully and stably compared against the
// invocation counts in methods.
int ciMethod::scale_count(int count, float prof_factor) {
if (count > 0 && method_data() != NULL) {
int counter_life;
int method_life = interpreter_invocation_count();
if (TieredCompilation) {
// In tiered the MDO's life is measured directly, so just use the snapshotted counters
counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count());
} else {
int current_mileage = method_data()->current_mileage();
int creation_mileage = method_data()->creation_mileage();
counter_life = current_mileage - creation_mileage;
}
// counter_life due to backedge_counter could be > method_life
if (counter_life > method_life)
counter_life = method_life;
if (0 < counter_life && counter_life <= method_life) {
count = (int)((double)count * prof_factor * method_life / counter_life + 0.5);
count = (count > 0) ? count : 1;
}
}
return count;
}
/**
* Check whether profiling provides a type for the return value from
* the call at bci bci
*
* @param bci bci of the call
* @return profiled type
*
* If the profile reports that the argument may be null, return false
* at least for now.
*/
ciKlass* ciMethod::return_profiled_type(int bci) {
if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) {
ciProfileData* data = method_data()->bci_to_data(bci);
if (data != NULL) {
if (data->is_VirtualCallTypeData()) {
assert_virtual_call_type_ok(bci);
ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
ciKlass* type = call->valid_return_type();
if (type != NULL && !call->return_maybe_null()) {
return type;
}
} else if (data->is_CallTypeData()) {
assert_call_type_ok(bci);
ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
ciKlass* type = call->valid_return_type();
if (type != NULL && !call->return_maybe_null()) {
return type;
}
}
}
}
return NULL;
}
