Esempi in C++ (Cpp) per methodHandle::is_method_handle_intrinsic

Esempio n. 1

File: compiledIC.cpp Progetto: ojdkbuild/lookaside_java-1.8.0-openjdk

// Compute settings for a CompiledStaticCall. Since we might have to set
// the stub when calling to the interpreter, we need to return arguments.
void CompiledStaticCall::compute_entry(methodHandle m, StaticCallInfo& info) {
  nmethod* m_code = m->code();
  info._callee = m;
  if (m_code != NULL && m_code->is_in_use()) {
    info._to_interpreter = false;
    info._entry  = m_code->verified_entry_point();
  } else {
    // Callee is interpreted code.  In any case entering the interpreter
    // puts a converter-frame on the stack to save arguments.
    assert(!m->is_method_handle_intrinsic(), "Compiled code should never call interpreter MH intrinsics");
    info._to_interpreter = true;
    info._entry      = m()->get_c2i_entry();
  }
}

Esempio n. 2

File: interpreter.cpp Progetto: shelan/jdk9-mirror

AbstractInterpreter::MethodKind AbstractInterpreter::method_kind(methodHandle m) {
  // Abstract method?
  if (m->is_abstract()) return abstract;

  // Method handle primitive?
  if (m->is_method_handle_intrinsic()) {
    vmIntrinsics::ID id = m->intrinsic_id();
    assert(MethodHandles::is_signature_polymorphic(id), "must match an intrinsic");
    MethodKind kind = (MethodKind)( method_handle_invoke_FIRST +
                                    ((int)id - vmIntrinsics::FIRST_MH_SIG_POLY) );
    assert(kind <= method_handle_invoke_LAST, "parallel enum ranges");
    return kind;
  }

#ifndef CC_INTERP
  if (UseCRC32Intrinsics && m->is_native()) {
    // Use optimized stub code for CRC32 native methods.
    switch (m->intrinsic_id()) {
      case vmIntrinsics::_updateCRC32            : return java_util_zip_CRC32_update;
      case vmIntrinsics::_updateBytesCRC32       : return java_util_zip_CRC32_updateBytes;
      case vmIntrinsics::_updateByteBufferCRC32  : return java_util_zip_CRC32_updateByteBuffer;
    }
  }
#endif

  // Native method?
  // Note: This test must come _before_ the test for intrinsic
  //       methods. See also comments below.
  if (m->is_native()) {
    assert(!m->is_method_handle_intrinsic(), "overlapping bits here, watch out");
    return m->is_synchronized() ? native_synchronized : native;
  }

  // Synchronized?
  if (m->is_synchronized()) {
    return zerolocals_synchronized;
  }

  if (RegisterFinalizersAtInit && m->code_size() == 1 &&
      m->intrinsic_id() == vmIntrinsics::_Object_init) {
    // We need to execute the special return bytecode to check for
    // finalizer registration so create a normal frame.
    return zerolocals;
  }

  // Empty method?
  if (m->is_empty_method()) {
    return empty;
  }

  // Special intrinsic method?
  // Note: This test must come _after_ the test for native methods,
  //       otherwise we will run into problems with JDK 1.2, see also
  //       InterpreterGenerator::generate_method_entry() for
  //       for details.
  switch (m->intrinsic_id()) {
    case vmIntrinsics::_dsin  : return java_lang_math_sin  ;
    case vmIntrinsics::_dcos  : return java_lang_math_cos  ;
    case vmIntrinsics::_dtan  : return java_lang_math_tan  ;
    case vmIntrinsics::_dabs  : return java_lang_math_abs  ;
    case vmIntrinsics::_dsqrt : return java_lang_math_sqrt ;
    case vmIntrinsics::_dlog  : return java_lang_math_log  ;
    case vmIntrinsics::_dlog10: return java_lang_math_log10;
    case vmIntrinsics::_dpow  : return java_lang_math_pow  ;
    case vmIntrinsics::_dexp  : return java_lang_math_exp  ;

    case vmIntrinsics::_Reference_get:
                                return java_lang_ref_reference_get;
  }

  // Accessor method?
  if (m->is_accessor()) {
    assert(m->size_of_parameters() == 1, "fast code for accessors assumes parameter size = 1");
    return accessor;
  }

  // Note: for now: zero locals for all non-empty methods
  return zerolocals;
}