hotspot/src/cpu/zero/vm/stubGenerator_zero.cpp - edge/openjdk - Git at Google

 /*
  * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
  * Copyright 2007, 2008, 2010 Red Hat, Inc.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */

 #include "precompiled.hpp"
 #include "asm/assembler.hpp"
 #include "assembler_zero.inline.hpp"
 #include "interpreter/interpreter.hpp"
 #include "nativeInst_zero.hpp"
 #include "oops/instanceOop.hpp"
 #include "oops/method.hpp"
 #include "oops/objArrayKlass.hpp"
 #include "oops/oop.inline.hpp"
 #include "prims/methodHandles.hpp"
 #include "runtime/frame.inline.hpp"
 #include "runtime/handles.inline.hpp"
 #include "runtime/sharedRuntime.hpp"
 #include "runtime/stubCodeGenerator.hpp"
 #include "runtime/stubRoutines.hpp"
 #include "runtime/thread.inline.hpp"
 #include "stack_zero.inline.hpp"
 #include "utilities/top.hpp"
 #ifdef COMPILER2
 #include "opto/runtime.hpp"
 #endif

 // Declaration and definition of StubGenerator (no .hpp file).
 // For a more detailed description of the stub routine structure
 // see the comment in stubRoutines.hpp

 class StubGenerator: public StubCodeGenerator {
  private:
   // The call stub is used to call Java from C
   static void call_stub(
     JavaCallWrapper *call_wrapper,
     intptr_t*        result,
     BasicType        result_type,
     Method*          method,
     address          entry_point,
     intptr_t*        parameters,
     int              parameter_words,
     TRAPS) {
     JavaThread *thread = (JavaThread *) THREAD;
     ZeroStack *stack = thread->zero_stack();

     // Make sure we have no pending exceptions
     assert(!HAS_PENDING_EXCEPTION, "call_stub called with pending exception");

     // Set up the stack if necessary
     bool stack_needs_teardown = false;
     if (stack->needs_setup()) {
       size_t zero_stack_size = stack->suggest_size(thread);
       stack->setup(alloca(zero_stack_size), zero_stack_size);
       stack_needs_teardown = true;
     }

     // Allocate and initialize our frame
     EntryFrame *frame =
       EntryFrame::build(parameters, parameter_words, call_wrapper, THREAD);

     if (!HAS_PENDING_EXCEPTION) {
       // Push the frame
       thread->push_zero_frame(frame);

       // Make the call
       Interpreter::invoke_method(method, entry_point, THREAD);

       // Store the result
       if (!HAS_PENDING_EXCEPTION) {
         switch (result_type) {
         case T_INT:
           *(jint *) result = *(jint *) stack->sp();
           break;
         case T_LONG:
           *(jlong *) result = *(jlong *) stack->sp();
           break;
         case T_FLOAT:
           *(jfloat *) result = *(jfloat *) stack->sp();
           break;
         case T_DOUBLE:
           *(jdouble *) result = *(jdouble *) stack->sp();
           break;
         case T_OBJECT:
           *(oop *) result = *(oop *) stack->sp();
           break;
         default:
           ShouldNotReachHere();
         }
       }

       // Unwind the frame
       thread->pop_zero_frame();
     }

     // Tear down the stack if necessary
     if (stack_needs_teardown)
       stack->teardown();
   }

   // These stubs get called from some dumb test routine.
   // I'll write them properly when they're called from
   // something that's actually doing something.
   static void fake_arraycopy_stub(address src, address dst, int count) {
     assert(count == 0, "huh?");
   }

   void generate_arraycopy_stubs() {
     // Call the conjoint generation methods immediately after
     // the disjoint ones so that short branches from the former
     // to the latter can be generated.
     StubRoutines::_jbyte_disjoint_arraycopy  = (address) fake_arraycopy_stub;
     StubRoutines::_jbyte_arraycopy           = (address) fake_arraycopy_stub;

     StubRoutines::_jshort_disjoint_arraycopy = (address) fake_arraycopy_stub;
     StubRoutines::_jshort_arraycopy          = (address) fake_arraycopy_stub;

     StubRoutines::_jint_disjoint_arraycopy   = (address) fake_arraycopy_stub;
     StubRoutines::_jint_arraycopy            = (address) fake_arraycopy_stub;

     StubRoutines::_jlong_disjoint_arraycopy  = (address) fake_arraycopy_stub;
     StubRoutines::_jlong_arraycopy           = (address) fake_arraycopy_stub;

     StubRoutines::_oop_disjoint_arraycopy    = ShouldNotCallThisStub();
     StubRoutines::_oop_arraycopy             = ShouldNotCallThisStub();

     StubRoutines::_checkcast_arraycopy       = ShouldNotCallThisStub();
     StubRoutines::_unsafe_arraycopy          = ShouldNotCallThisStub();
     StubRoutines::_generic_arraycopy         = ShouldNotCallThisStub();

     // We don't generate specialized code for HeapWord-aligned source
     // arrays, so just use the code we've already generated
     StubRoutines::_arrayof_jbyte_disjoint_arraycopy =
       StubRoutines::_jbyte_disjoint_arraycopy;
     StubRoutines::_arrayof_jbyte_arraycopy =
       StubRoutines::_jbyte_arraycopy;

     StubRoutines::_arrayof_jshort_disjoint_arraycopy =
       StubRoutines::_jshort_disjoint_arraycopy;
     StubRoutines::_arrayof_jshort_arraycopy =
       StubRoutines::_jshort_arraycopy;

     StubRoutines::_arrayof_jint_disjoint_arraycopy =
       StubRoutines::_jint_disjoint_arraycopy;
     StubRoutines::_arrayof_jint_arraycopy =
       StubRoutines::_jint_arraycopy;

     StubRoutines::_arrayof_jlong_disjoint_arraycopy =
       StubRoutines::_jlong_disjoint_arraycopy;
     StubRoutines::_arrayof_jlong_arraycopy =
       StubRoutines::_jlong_arraycopy;

     StubRoutines::_arrayof_oop_disjoint_arraycopy =
       StubRoutines::_oop_disjoint_arraycopy;
     StubRoutines::_arrayof_oop_arraycopy =
       StubRoutines::_oop_arraycopy;
   }

   static int SafeFetch32(int *adr, int errValue) {
     int value = errValue;
     value = *adr;
     return value;
   }

   static intptr_t SafeFetchN(intptr_t *adr, intptr_t errValue) {
     intptr_t value = errValue;
     value = *adr;
     return value;
   }


   void generate_initial() {
     // Generates all stubs and initializes the entry points

     // entry points that exist in all platforms Note: This is code
     // that could be shared among different platforms - however the
     // benefit seems to be smaller than the disadvantage of having a
     // much more complicated generator structure. See also comment in
     // stubRoutines.hpp.

     StubRoutines::_forward_exception_entry   = ShouldNotCallThisStub();
     StubRoutines::_call_stub_entry           = (address) call_stub;
     StubRoutines::_catch_exception_entry     = ShouldNotCallThisStub();

     // atomic calls
     StubRoutines::_atomic_xchg_entry         = ShouldNotCallThisStub();
     StubRoutines::_atomic_xchg_ptr_entry     = ShouldNotCallThisStub();
     StubRoutines::_atomic_cmpxchg_entry      = ShouldNotCallThisStub();
     StubRoutines::_atomic_cmpxchg_ptr_entry  = ShouldNotCallThisStub();
     StubRoutines::_atomic_cmpxchg_long_entry = ShouldNotCallThisStub();
     StubRoutines::_atomic_add_entry          = ShouldNotCallThisStub();
     StubRoutines::_atomic_add_ptr_entry      = ShouldNotCallThisStub();
     StubRoutines::_fence_entry               = ShouldNotCallThisStub();

     // amd64 does this here, sparc does it in generate_all()
     StubRoutines::_handler_for_unsafe_access_entry =
       ShouldNotCallThisStub();
   }

   void generate_all() {
     // Generates all stubs and initializes the entry points

     // These entry points require SharedInfo::stack0 to be set up in
     // non-core builds and need to be relocatable, so they each
     // fabricate a RuntimeStub internally.
     StubRoutines::_throw_AbstractMethodError_entry =
       ShouldNotCallThisStub();

     StubRoutines::_throw_NullPointerException_at_call_entry =
       ShouldNotCallThisStub();

     StubRoutines::_throw_StackOverflowError_entry =
       ShouldNotCallThisStub();

     // support for verify_oop (must happen after universe_init)
     StubRoutines::_verify_oop_subroutine_entry =
       ShouldNotCallThisStub();

     // arraycopy stubs used by compilers
     generate_arraycopy_stubs();

     // Safefetch stubs.
     StubRoutines::_safefetch32_entry = CAST_FROM_FN_PTR(address, StubGenerator::SafeFetch32);
     StubRoutines::_safefetch32_fault_pc = NULL;
     StubRoutines::_safefetch32_continuation_pc = NULL;

     StubRoutines::_safefetchN_entry = CAST_FROM_FN_PTR(address, StubGenerator::SafeFetchN);
     StubRoutines::_safefetchN_fault_pc = NULL;
     StubRoutines::_safefetchN_continuation_pc = NULL;
   }

  public:
   StubGenerator(CodeBuffer* code, bool all) : StubCodeGenerator(code) {
     if (all) {
       generate_all();
     } else {
       generate_initial();
     }
   }
 };

 void StubGenerator_generate(CodeBuffer* code, bool all) {
   StubGenerator g(code, all);
 }

 EntryFrame *EntryFrame::build(const intptr_t*  parameters,
                               int              parameter_words,
                               JavaCallWrapper* call_wrapper,
                               TRAPS) {

   ZeroStack *stack = ((JavaThread *) THREAD)->zero_stack();
   stack->overflow_check(header_words + parameter_words, CHECK_NULL);

   stack->push(0); // next_frame, filled in later
   intptr_t *fp = stack->sp();
   assert(fp - stack->sp() == next_frame_off, "should be");

   stack->push(ENTRY_FRAME);
   assert(fp - stack->sp() == frame_type_off, "should be");

   stack->push((intptr_t) call_wrapper);
   assert(fp - stack->sp() == call_wrapper_off, "should be");

   for (int i = 0; i < parameter_words; i++)
     stack->push(parameters[i]);

   return (EntryFrame *) fp;
 }
	/*
	* Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
	* Copyright 2007, 2008, 2010 Red Hat, Inc.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*
	*/

	#include "precompiled.hpp"
	#include "asm/assembler.hpp"
	#include "assembler_zero.inline.hpp"
	#include "interpreter/interpreter.hpp"
	#include "nativeInst_zero.hpp"
	#include "oops/instanceOop.hpp"
	#include "oops/method.hpp"
	#include "oops/objArrayKlass.hpp"
	#include "oops/oop.inline.hpp"
	#include "prims/methodHandles.hpp"
	#include "runtime/frame.inline.hpp"
	#include "runtime/handles.inline.hpp"
	#include "runtime/sharedRuntime.hpp"
	#include "runtime/stubCodeGenerator.hpp"
	#include "runtime/stubRoutines.hpp"
	#include "runtime/thread.inline.hpp"
	#include "stack_zero.inline.hpp"
	#include "utilities/top.hpp"
	#ifdef COMPILER2
	#include "opto/runtime.hpp"
	#endif

	// Declaration and definition of StubGenerator (no .hpp file).
	// For a more detailed description of the stub routine structure
	// see the comment in stubRoutines.hpp

	class StubGenerator: public StubCodeGenerator {
	private:
	// The call stub is used to call Java from C
	static void call_stub(
	JavaCallWrapper *call_wrapper,
	intptr_t* result,
	BasicType result_type,
	Method* method,
	address entry_point,
	intptr_t* parameters,
	int parameter_words,
	TRAPS) {
	JavaThread thread = (JavaThread ) THREAD;
	ZeroStack *stack = thread->zero_stack();

	// Make sure we have no pending exceptions
	assert(!HAS_PENDING_EXCEPTION, "call_stub called with pending exception");

	// Set up the stack if necessary
	bool stack_needs_teardown = false;
	if (stack->needs_setup()) {
	size_t zero_stack_size = stack->suggest_size(thread);
	stack->setup(alloca(zero_stack_size), zero_stack_size);
	stack_needs_teardown = true;
	}

	// Allocate and initialize our frame
	EntryFrame *frame =
	EntryFrame::build(parameters, parameter_words, call_wrapper, THREAD);

	if (!HAS_PENDING_EXCEPTION) {
	// Push the frame
	thread->push_zero_frame(frame);

	// Make the call
	Interpreter::invoke_method(method, entry_point, THREAD);

	// Store the result
	if (!HAS_PENDING_EXCEPTION) {
	switch (result_type) {
	case T_INT:
	(jint ) result = (jint ) stack->sp();
	break;
	case T_LONG:
	(jlong ) result = (jlong ) stack->sp();
	break;
	case T_FLOAT:
	(jfloat ) result = (jfloat ) stack->sp();
	break;
	case T_DOUBLE:
	(jdouble ) result = (jdouble ) stack->sp();
	break;
	case T_OBJECT:
	(oop ) result = (oop ) stack->sp();
	break;
	default:
	ShouldNotReachHere();
	}
	}

	// Unwind the frame
	thread->pop_zero_frame();
	}

	// Tear down the stack if necessary
	if (stack_needs_teardown)
	stack->teardown();
	}

	// These stubs get called from some dumb test routine.
	// I'll write them properly when they're called from
	// something that's actually doing something.
	static void fake_arraycopy_stub(address src, address dst, int count) {
	assert(count == 0, "huh?");
	}

	void generate_arraycopy_stubs() {
	// Call the conjoint generation methods immediately after
	// the disjoint ones so that short branches from the former
	// to the latter can be generated.
	StubRoutines::_jbyte_disjoint_arraycopy = (address) fake_arraycopy_stub;
	StubRoutines::_jbyte_arraycopy = (address) fake_arraycopy_stub;

	StubRoutines::_jshort_disjoint_arraycopy = (address) fake_arraycopy_stub;
	StubRoutines::_jshort_arraycopy = (address) fake_arraycopy_stub;

	StubRoutines::_jint_disjoint_arraycopy = (address) fake_arraycopy_stub;
	StubRoutines::_jint_arraycopy = (address) fake_arraycopy_stub;

	StubRoutines::_jlong_disjoint_arraycopy = (address) fake_arraycopy_stub;
	StubRoutines::_jlong_arraycopy = (address) fake_arraycopy_stub;

	StubRoutines::_oop_disjoint_arraycopy = ShouldNotCallThisStub();
	StubRoutines::_oop_arraycopy = ShouldNotCallThisStub();

	StubRoutines::_checkcast_arraycopy = ShouldNotCallThisStub();
	StubRoutines::_unsafe_arraycopy = ShouldNotCallThisStub();
	StubRoutines::_generic_arraycopy = ShouldNotCallThisStub();

	// We don't generate specialized code for HeapWord-aligned source
	// arrays, so just use the code we've already generated
	StubRoutines::_arrayof_jbyte_disjoint_arraycopy =
	StubRoutines::_jbyte_disjoint_arraycopy;
	StubRoutines::_arrayof_jbyte_arraycopy =
	StubRoutines::_jbyte_arraycopy;

	StubRoutines::_arrayof_jshort_disjoint_arraycopy =
	StubRoutines::_jshort_disjoint_arraycopy;
	StubRoutines::_arrayof_jshort_arraycopy =
	StubRoutines::_jshort_arraycopy;

	StubRoutines::_arrayof_jint_disjoint_arraycopy =
	StubRoutines::_jint_disjoint_arraycopy;
	StubRoutines::_arrayof_jint_arraycopy =
	StubRoutines::_jint_arraycopy;

	StubRoutines::_arrayof_jlong_disjoint_arraycopy =
	StubRoutines::_jlong_disjoint_arraycopy;
	StubRoutines::_arrayof_jlong_arraycopy =
	StubRoutines::_jlong_arraycopy;

	StubRoutines::_arrayof_oop_disjoint_arraycopy =
	StubRoutines::_oop_disjoint_arraycopy;
	StubRoutines::_arrayof_oop_arraycopy =
	StubRoutines::_oop_arraycopy;
	}

	static int SafeFetch32(int *adr, int errValue) {
	int value = errValue;
	value = *adr;
	return value;
	}

	static intptr_t SafeFetchN(intptr_t *adr, intptr_t errValue) {
	intptr_t value = errValue;
	value = *adr;
	return value;
	}


	void generate_initial() {
	// Generates all stubs and initializes the entry points

	// entry points that exist in all platforms Note: This is code
	// that could be shared among different platforms - however the
	// benefit seems to be smaller than the disadvantage of having a
	// much more complicated generator structure. See also comment in
	// stubRoutines.hpp.

	StubRoutines::_forward_exception_entry = ShouldNotCallThisStub();
	StubRoutines::_call_stub_entry = (address) call_stub;
	StubRoutines::_catch_exception_entry = ShouldNotCallThisStub();

	// atomic calls
	StubRoutines::_atomic_xchg_entry = ShouldNotCallThisStub();
	StubRoutines::_atomic_xchg_ptr_entry = ShouldNotCallThisStub();
	StubRoutines::_atomic_cmpxchg_entry = ShouldNotCallThisStub();
	StubRoutines::_atomic_cmpxchg_ptr_entry = ShouldNotCallThisStub();
	StubRoutines::_atomic_cmpxchg_long_entry = ShouldNotCallThisStub();
	StubRoutines::_atomic_add_entry = ShouldNotCallThisStub();
	StubRoutines::_atomic_add_ptr_entry = ShouldNotCallThisStub();
	StubRoutines::_fence_entry = ShouldNotCallThisStub();

	// amd64 does this here, sparc does it in generate_all()
	StubRoutines::_handler_for_unsafe_access_entry =
	ShouldNotCallThisStub();
	}

	void generate_all() {
	// Generates all stubs and initializes the entry points

	// These entry points require SharedInfo::stack0 to be set up in
	// non-core builds and need to be relocatable, so they each
	// fabricate a RuntimeStub internally.
	StubRoutines::_throw_AbstractMethodError_entry =
	ShouldNotCallThisStub();

	StubRoutines::_throw_NullPointerException_at_call_entry =
	ShouldNotCallThisStub();

	StubRoutines::_throw_StackOverflowError_entry =
	ShouldNotCallThisStub();

	// support for verify_oop (must happen after universe_init)
	StubRoutines::_verify_oop_subroutine_entry =
	ShouldNotCallThisStub();

	// arraycopy stubs used by compilers
	generate_arraycopy_stubs();

	// Safefetch stubs.
	StubRoutines::_safefetch32_entry = CAST_FROM_FN_PTR(address, StubGenerator::SafeFetch32);
	StubRoutines::_safefetch32_fault_pc = NULL;
	StubRoutines::_safefetch32_continuation_pc = NULL;

	StubRoutines::_safefetchN_entry = CAST_FROM_FN_PTR(address, StubGenerator::SafeFetchN);
	StubRoutines::_safefetchN_fault_pc = NULL;
	StubRoutines::_safefetchN_continuation_pc = NULL;
	}

	public:
	StubGenerator(CodeBuffer* code, bool all) : StubCodeGenerator(code) {
	if (all) {
	generate_all();
	} else {
	generate_initial();
	}
	}
	};

	void StubGenerator_generate(CodeBuffer* code, bool all) {
	StubGenerator g(code, all);
	}

	EntryFrame EntryFrame::build(const intptr_t parameters,
	int parameter_words,
	JavaCallWrapper* call_wrapper,
	TRAPS) {

	ZeroStack stack = ((JavaThread ) THREAD)->zero_stack();
	stack->overflow_check(header_words + parameter_words, CHECK_NULL);

	stack->push(0); // next_frame, filled in later
	intptr_t *fp = stack->sp();
	assert(fp - stack->sp() == next_frame_off, "should be");

	stack->push(ENTRY_FRAME);
	assert(fp - stack->sp() == frame_type_off, "should be");

	stack->push((intptr_t) call_wrapper);
	assert(fp - stack->sp() == call_wrapper_off, "should be");

	for (int i = 0; i < parameter_words; i++)
	stack->push(parameters[i]);

	return (EntryFrame *) fp;
	}