private StubForeignCallNode createTargetCall(
GraphKit kit, ParameterNode[] params, ReadRegisterNode thread) {
if (prependThread) {
ValueNode[] targetArguments = new ValueNode[1 + params.length];
targetArguments[0] = thread;
System.arraycopy(params, 0, targetArguments, 1, params.length);
return kit.append(
new StubForeignCallNode(
providers.getForeignCalls(), target.getDescriptor(), targetArguments));
} else {
return kit.append(
new StubForeignCallNode(providers.getForeignCalls(), target.getDescriptor(), params));
}
}
@Override
public Variable emitForeignCall(ForeignCallLinkage linkage, LIRFrameState state, Value... args) {
HotSpotForeignCallLinkage hotspotLinkage = (HotSpotForeignCallLinkage) linkage;
Variable result;
LIRFrameState debugInfo = null;
if (hotspotLinkage.needsDebugInfo()) {
debugInfo = state;
assert debugInfo != null || getStub() != null;
}
if (linkage.destroysRegisters() || hotspotLinkage.needsJavaFrameAnchor()) {
HotSpotRegistersProvider registers = getProviders().getRegisters();
Register thread = registers.getThreadRegister();
Variable scratch = newVariable(LIRKind.value(target().arch.getWordKind()));
// We need a label for the return address.
label = new Label();
append(
new AArch64HotSpotCRuntimeCallPrologueOp(
config.threadLastJavaSpOffset(),
config.threadLastJavaPcOffset(),
config.threadLastJavaFpOffset(),
thread,
scratch,
label));
result = super.emitForeignCall(hotspotLinkage, debugInfo, args);
append(
new AArch64HotSpotCRuntimeCallEpilogueOp(
config.threadLastJavaSpOffset(), config.threadLastJavaFpOffset(), thread));
// Clear it out so it's not being reused later.
label = null;
} else {
result = super.emitForeignCall(hotspotLinkage, debugInfo, args);
}
return result;
}