How to use

getCodeCache

method

in

com.oracle.svm.core.graal.code.SubstrateBackend

@Override
public RegisterAllocationConfig newRegisterAllocationConfig(RegisterConfig registerConfig, String[] allocationRestrictedTo) {
  RegisterConfig registerConfigNonNull = registerConfig == null ? getCodeCache().getRegisterConfig() : registerConfig;
  return new RegisterAllocationConfig(registerConfigNonNull, allocationRestrictedTo);
}

public CompileFunction createCustomCompileFunction() {
  return (debug, method, identifier, reason, config) -> {
    SubstrateBackend backend = config.getBackendForNormalMethod();
    VMError.guarantee(backend.getTarget().arch instanceof AMD64, "currently only implemented on AMD64");
    // Determine register for jmethodID argument
    HostedProviders providers = (HostedProviders) config.getProviders();
    List<JavaType> parameters = new ArrayList<>();
    parameters.add(providers.getMetaAccess().lookupJavaType(JNIEnvironment.class));
    parameters.add(providers.getMetaAccess().lookupJavaType(JNIObjectHandle.class));
    if (nonVirtual) {
      parameters.add(providers.getMetaAccess().lookupJavaType(JNIObjectHandle.class));
    }
    parameters.add(providers.getMetaAccess().lookupJavaType(JNIMethodId.class));
    ResolvedJavaType returnType = providers.getWordTypes().getWordImplType();
    CallingConvention callingConvention = backend.getCodeCache().getRegisterConfig().getCallingConvention(
            SubstrateCallingConventionType.NativeCall, returnType, parameters.toArray(new JavaType[0]), backend);
    RegisterValue methodIdArg = (RegisterValue) callingConvention.getArgument(parameters.size() - 1);
    return backend.createJNITrampolineMethod(method, identifier, methodIdArg, getFieldOffset(providers));
  };
}