708 lines
31 KiB
C++
708 lines
31 KiB
C++
/*
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* Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef SHARE_VM_RUNTIME_SHAREDRUNTIME_HPP
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#define SHARE_VM_RUNTIME_SHAREDRUNTIME_HPP
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#include "interpreter/bytecodeHistogram.hpp"
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#include "interpreter/bytecodeTracer.hpp"
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#include "interpreter/linkResolver.hpp"
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#include "memory/allocation.hpp"
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#include "memory/resourceArea.hpp"
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#include "utilities/hashtable.hpp"
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#include "utilities/macros.hpp"
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class AdapterHandlerEntry;
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class AdapterHandlerTable;
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class AdapterFingerPrint;
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class vframeStream;
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// Runtime is the base class for various runtime interfaces
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// (InterpreterRuntime, CompilerRuntime, etc.). It provides
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// shared functionality such as exception forwarding (C++ to
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// Java exceptions), locking/unlocking mechanisms, statistical
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// information, etc.
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class SharedRuntime: AllStatic {
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friend class VMStructs;
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private:
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static methodHandle resolve_sub_helper(JavaThread *thread,
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bool is_virtual,
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bool is_optimized, TRAPS);
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// Shared stub locations
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static RuntimeStub* _wrong_method_blob;
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static RuntimeStub* _wrong_method_abstract_blob;
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static RuntimeStub* _ic_miss_blob;
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static RuntimeStub* _resolve_opt_virtual_call_blob;
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static RuntimeStub* _resolve_virtual_call_blob;
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static RuntimeStub* _resolve_static_call_blob;
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static DeoptimizationBlob* _deopt_blob;
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static SafepointBlob* _polling_page_vectors_safepoint_handler_blob;
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static SafepointBlob* _polling_page_safepoint_handler_blob;
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static SafepointBlob* _polling_page_return_handler_blob;
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#ifdef COMPILER2
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static UncommonTrapBlob* _uncommon_trap_blob;
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#endif // COMPILER2
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#ifndef PRODUCT
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// Counters
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static int _nof_megamorphic_calls; // total # of megamorphic calls (through vtable)
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#endif // !PRODUCT
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private:
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enum { POLL_AT_RETURN, POLL_AT_LOOP, POLL_AT_VECTOR_LOOP };
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static SafepointBlob* generate_handler_blob(address call_ptr, int poll_type);
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static RuntimeStub* generate_resolve_blob(address destination, const char* name);
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public:
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static void generate_stubs(void);
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// max bytes for each dtrace string parameter
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enum { max_dtrace_string_size = 256 };
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// The following arithmetic routines are used on platforms that do
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// not have machine instructions to implement their functionality.
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// Do not remove these.
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// long arithmetics
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static jlong lmul(jlong y, jlong x);
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static jlong ldiv(jlong y, jlong x);
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static jlong lrem(jlong y, jlong x);
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// float and double remainder
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static jfloat frem(jfloat x, jfloat y);
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static jdouble drem(jdouble x, jdouble y);
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#ifdef _WIN64
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// Workaround for fmod issue in the Windows x64 CRT
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static double fmod_winx64(double x, double y);
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#endif
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#ifdef __SOFTFP__
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static jfloat fadd(jfloat x, jfloat y);
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static jfloat fsub(jfloat x, jfloat y);
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static jfloat fmul(jfloat x, jfloat y);
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static jfloat fdiv(jfloat x, jfloat y);
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static jdouble dadd(jdouble x, jdouble y);
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static jdouble dsub(jdouble x, jdouble y);
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static jdouble dmul(jdouble x, jdouble y);
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static jdouble ddiv(jdouble x, jdouble y);
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#endif // __SOFTFP__
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// float conversion (needs to set appropriate rounding mode)
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static jint f2i (jfloat x);
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static jlong f2l (jfloat x);
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static jint d2i (jdouble x);
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static jlong d2l (jdouble x);
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static jfloat d2f (jdouble x);
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static jfloat l2f (jlong x);
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static jdouble l2d (jlong x);
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#ifdef __SOFTFP__
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static jfloat i2f (jint x);
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static jdouble i2d (jint x);
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static jdouble f2d (jfloat x);
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#endif // __SOFTFP__
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// double trigonometrics and transcendentals
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static jdouble dsin(jdouble x);
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static jdouble dcos(jdouble x);
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static jdouble dtan(jdouble x);
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static jdouble dlog(jdouble x);
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static jdouble dlog10(jdouble x);
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static jdouble dexp(jdouble x);
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static jdouble dpow(jdouble x, jdouble y);
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#if defined(__SOFTFP__) || defined(E500V2)
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static double dabs(double f);
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#endif
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#if defined(__SOFTFP__) || defined(PPC)
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static double dsqrt(double f);
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#endif
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// Montgomery multiplication
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static void montgomery_multiply(jint *a_ints, jint *b_ints, jint *n_ints,
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jint len, jlong inv, jint *m_ints);
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static void montgomery_square(jint *a_ints, jint *n_ints,
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jint len, jlong inv, jint *m_ints);
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#ifdef __SOFTFP__
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// C++ compiler generates soft float instructions as well as passing
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// float and double in registers.
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static int fcmpl(float x, float y);
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static int fcmpg(float x, float y);
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static int dcmpl(double x, double y);
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static int dcmpg(double x, double y);
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static int unordered_fcmplt(float x, float y);
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static int unordered_dcmplt(double x, double y);
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static int unordered_fcmple(float x, float y);
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static int unordered_dcmple(double x, double y);
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static int unordered_fcmpge(float x, float y);
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static int unordered_dcmpge(double x, double y);
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static int unordered_fcmpgt(float x, float y);
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static int unordered_dcmpgt(double x, double y);
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static float fneg(float f);
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static double dneg(double f);
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#endif
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// exception handling across interpreter/compiler boundaries
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static address raw_exception_handler_for_return_address(JavaThread* thread, address return_address);
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static address exception_handler_for_return_address(JavaThread* thread, address return_address);
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#if INCLUDE_ALL_GCS
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// G1 write barriers
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static void g1_wb_pre(oopDesc* orig, JavaThread *thread);
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static void g1_wb_post(void* card_addr, JavaThread* thread);
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#endif // INCLUDE_ALL_GCS
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// exception handling and implicit exceptions
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static address compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception,
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bool force_unwind, bool top_frame_only);
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enum ImplicitExceptionKind {
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IMPLICIT_NULL,
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IMPLICIT_DIVIDE_BY_ZERO,
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STACK_OVERFLOW
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};
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static void throw_AbstractMethodError(JavaThread* thread);
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static void throw_IncompatibleClassChangeError(JavaThread* thread);
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static void throw_ArithmeticException(JavaThread* thread);
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static void throw_NullPointerException(JavaThread* thread);
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static void throw_NullPointerException_at_call(JavaThread* thread);
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static void throw_StackOverflowError(JavaThread* thread);
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static void throw_delayed_StackOverflowError(JavaThread* thread);
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static void throw_StackOverflowError_common(JavaThread* thread, bool delayed);
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static address continuation_for_implicit_exception(JavaThread* thread,
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address faulting_pc,
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ImplicitExceptionKind exception_kind);
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#if INCLUDE_JVMCI
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static address deoptimize_for_implicit_exception(JavaThread* thread, address pc, nmethod* nm, int deopt_reason);
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#endif
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static void enable_stack_reserved_zone(JavaThread* thread);
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static frame look_for_reserved_stack_annotated_method(JavaThread* thread, frame fr);
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// Shared stub locations
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static address get_poll_stub(address pc);
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static address get_ic_miss_stub() {
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assert(_ic_miss_blob!= NULL, "oops");
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return _ic_miss_blob->entry_point();
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}
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static address get_handle_wrong_method_stub() {
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assert(_wrong_method_blob!= NULL, "oops");
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return _wrong_method_blob->entry_point();
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}
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static address get_handle_wrong_method_abstract_stub() {
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assert(_wrong_method_abstract_blob!= NULL, "oops");
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return _wrong_method_abstract_blob->entry_point();
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}
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#ifdef COMPILER2
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static void generate_uncommon_trap_blob(void);
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static UncommonTrapBlob* uncommon_trap_blob() { return _uncommon_trap_blob; }
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#endif // COMPILER2
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static address get_resolve_opt_virtual_call_stub() {
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assert(_resolve_opt_virtual_call_blob != NULL, "oops");
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return _resolve_opt_virtual_call_blob->entry_point();
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}
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static address get_resolve_virtual_call_stub() {
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assert(_resolve_virtual_call_blob != NULL, "oops");
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return _resolve_virtual_call_blob->entry_point();
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}
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static address get_resolve_static_call_stub() {
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assert(_resolve_static_call_blob != NULL, "oops");
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return _resolve_static_call_blob->entry_point();
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}
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static SafepointBlob* polling_page_return_handler_blob() { return _polling_page_return_handler_blob; }
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static SafepointBlob* polling_page_safepoint_handler_blob() { return _polling_page_safepoint_handler_blob; }
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static SafepointBlob* polling_page_vectors_safepoint_handler_blob() { return _polling_page_vectors_safepoint_handler_blob; }
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// Counters
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#ifndef PRODUCT
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static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; }
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#endif // PRODUCT
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// Helper routine for full-speed JVMTI exception throwing support
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static void throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception);
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static void throw_and_post_jvmti_exception(JavaThread *thread, Symbol* name, const char *message = NULL);
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// RedefineClasses() tracing support for obsolete method entry
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static int rc_trace_method_entry(JavaThread* thread, Method* m);
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// To be used as the entry point for unresolved native methods.
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static address native_method_throw_unsatisfied_link_error_entry();
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static address native_method_throw_unsupported_operation_exception_entry();
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// bytecode tracing is only used by the TraceBytecodes
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static intptr_t trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2) PRODUCT_RETURN0;
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static oop retrieve_receiver(Symbol* sig, frame caller);
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static void register_finalizer(JavaThread* thread, oopDesc* obj);
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// dtrace notifications
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static int dtrace_object_alloc(oopDesc* o, int size);
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static int dtrace_object_alloc_base(Thread* thread, oopDesc* o, int size);
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static int dtrace_method_entry(JavaThread* thread, Method* m);
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static int dtrace_method_exit(JavaThread* thread, Method* m);
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// Utility method for retrieving the Java thread id, returns 0 if the
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// thread is not a well formed Java thread.
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static jlong get_java_tid(Thread* thread);
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// used by native wrappers to reenable yellow if overflow happened in native code
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static void reguard_yellow_pages();
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// Fill in the "X cannot be cast to a Y" message for ClassCastException
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//
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// @param thr the current thread
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// @param name the name of the class of the object attempted to be cast
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// @return the dynamically allocated exception message (must be freed
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// by the caller using a resource mark)
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//
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// BCP must refer to the current 'checkcast' opcode for the frame
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// on top of the stack.
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// The caller (or one of it's callers) must use a ResourceMark
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// in order to correctly free the result.
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//
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static char* generate_class_cast_message(JavaThread* thr, const char* name);
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// Fill in the "X cannot be cast to a Y" message for ClassCastException
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//
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// @param name the name of the class of the object attempted to be cast
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// @param klass the name of the target klass attempt
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// @param gripe the specific kind of problem being reported
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// @return the dynamically allocated exception message (must be freed
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// by the caller using a resource mark)
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//
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// This version does not require access the frame, so it can be called
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// from interpreted code
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// The caller (or one of it's callers) must use a ResourceMark
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// in order to correctly free the result.
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//
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static char* generate_class_cast_message(const char* name, const char* klass,
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const char* gripe = " cannot be cast to ");
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// Resolves a call site- may patch in the destination of the call into the
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// compiled code.
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static methodHandle resolve_helper(JavaThread *thread,
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bool is_virtual,
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bool is_optimized, TRAPS);
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private:
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// deopt blob
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static void generate_deopt_blob(void);
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public:
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static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; }
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// Resets a call-site in compiled code so it will get resolved again.
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static methodHandle reresolve_call_site(JavaThread *thread, TRAPS);
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// In the code prolog, if the klass comparison fails, the inline cache
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// misses and the call site is patched to megamorphic
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static methodHandle handle_ic_miss_helper(JavaThread* thread, TRAPS);
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// Find the method that called us.
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static methodHandle find_callee_method(JavaThread* thread, TRAPS);
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private:
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static Handle find_callee_info(JavaThread* thread,
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Bytecodes::Code& bc,
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CallInfo& callinfo, TRAPS);
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static Handle find_callee_info_helper(JavaThread* thread,
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vframeStream& vfst,
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Bytecodes::Code& bc,
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CallInfo& callinfo, TRAPS);
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static methodHandle extract_attached_method(vframeStream& vfst);
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static address clean_virtual_call_entry();
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static address clean_opt_virtual_call_entry();
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static address clean_static_call_entry();
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public:
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// Read the array of BasicTypes from a Java signature, and compute where
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// compiled Java code would like to put the results. Values in reg_lo and
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// reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are
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// registers, those above refer to 4-byte stack slots. All stack slots are
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// based off of the window top. SharedInfo::stack0 refers to the first usable
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// slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
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// 4-bytes higher. So for sparc because the register window save area is at
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// the bottom of the frame the first 16 words will be skipped and SharedInfo::stack0
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// will be just above it. (
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// return value is the maximum number of VMReg stack slots the convention will use.
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static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed, int is_outgoing);
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static void check_member_name_argument_is_last_argument(const methodHandle& method,
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const BasicType* sig_bt,
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const VMRegPair* regs) NOT_DEBUG_RETURN;
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// Ditto except for calling C
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//
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// C argument in register AND stack slot.
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// Some architectures require that an argument must be passed in a register
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// AND in a stack slot. These architectures provide a second VMRegPair array
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// to be filled by the c_calling_convention method. On other architectures,
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// NULL is being passed as the second VMRegPair array, so arguments are either
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// passed in a register OR in a stack slot.
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static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, VMRegPair *regs2,
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int total_args_passed);
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// Compute the new number of arguments in the signature if 32 bit ints
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// must be converted to longs. Needed if CCallingConventionRequiresIntsAsLongs
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// is true.
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static int convert_ints_to_longints_argcnt(int in_args_count, BasicType* in_sig_bt);
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// Adapt a method's signature if it contains 32 bit integers that must
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// be converted to longs. Needed if CCallingConventionRequiresIntsAsLongs
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// is true.
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static void convert_ints_to_longints(int i2l_argcnt, int& in_args_count,
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BasicType*& in_sig_bt, VMRegPair*& in_regs);
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// Generate I2C and C2I adapters. These adapters are simple argument marshalling
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// blobs. Unlike adapters in the tiger and earlier releases the code in these
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// blobs does not create a new frame and are therefore virtually invisible
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// to the stack walking code. In general these blobs extend the callers stack
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// as needed for the conversion of argument locations.
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// When calling a c2i blob the code will always call the interpreter even if
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// by the time we reach the blob there is compiled code available. This allows
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// the blob to pass the incoming stack pointer (the sender sp) in a known
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// location for the interpreter to record. This is used by the frame code
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// to correct the sender code to match up with the stack pointer when the
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// thread left the compiled code. In addition it allows the interpreter
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// to remove the space the c2i adapter allocated to do its argument conversion.
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// Although a c2i blob will always run interpreted even if compiled code is
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// present if we see that compiled code is present the compiled call site
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// will be patched/re-resolved so that later calls will run compiled.
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// Additionally a c2i blob need to have a unverified entry because it can be reached
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// in situations where the call site is an inlined cache site and may go megamorphic.
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// A i2c adapter is simpler than the c2i adapter. This is because it is assumed
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// that the interpreter before it does any call dispatch will record the current
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// stack pointer in the interpreter frame. On return it will restore the stack
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// pointer as needed. This means the i2c adapter code doesn't need any special
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// handshaking path with compiled code to keep the stack walking correct.
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static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *_masm,
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int total_args_passed,
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int max_arg,
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const BasicType *sig_bt,
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const VMRegPair *regs,
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AdapterFingerPrint* fingerprint);
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static void gen_i2c_adapter(MacroAssembler *_masm,
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int total_args_passed,
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int comp_args_on_stack,
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const BasicType *sig_bt,
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const VMRegPair *regs);
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// OSR support
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// OSR_migration_begin will extract the jvm state from an interpreter
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// frame (locals, monitors) and store the data in a piece of C heap
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// storage. This then allows the interpreter frame to be removed from the
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// stack and the OSR nmethod to be called. That method is called with a
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// pointer to the C heap storage. This pointer is the return value from
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// OSR_migration_begin.
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static intptr_t* OSR_migration_begin(JavaThread *thread);
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// OSR_migration_end is a trivial routine. It is called after the compiled
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// method has extracted the jvm state from the C heap that OSR_migration_begin
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// created. It's entire job is to simply free this storage.
|
|
static void OSR_migration_end(intptr_t* buf);
|
|
|
|
// Convert a sig into a calling convention register layout
|
|
// and find interesting things about it.
|
|
static VMRegPair* find_callee_arguments(Symbol* sig, bool has_receiver, bool has_appendix, int *arg_size);
|
|
static VMReg name_for_receiver();
|
|
|
|
// "Top of Stack" slots that may be unused by the calling convention but must
|
|
// otherwise be preserved.
|
|
// On Intel these are not necessary and the value can be zero.
|
|
// On Sparc this describes the words reserved for storing a register window
|
|
// when an interrupt occurs.
|
|
static uint out_preserve_stack_slots();
|
|
|
|
// Is vector's size (in bytes) bigger than a size saved by default?
|
|
// For example, on x86 16 bytes XMM registers are saved by default.
|
|
static bool is_wide_vector(int size);
|
|
|
|
// Save and restore a native result
|
|
static void save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots);
|
|
static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots);
|
|
|
|
// Generate a native wrapper for a given method. The method takes arguments
|
|
// in the Java compiled code convention, marshals them to the native
|
|
// convention (handlizes oops, etc), transitions to native, makes the call,
|
|
// returns to java state (possibly blocking), unhandlizes any result and
|
|
// returns.
|
|
//
|
|
// The wrapper may contain special-case code if the given method
|
|
// is a JNI critical method, or a compiled method handle adapter,
|
|
// such as _invokeBasic, _linkToVirtual, etc.
|
|
static nmethod* generate_native_wrapper(MacroAssembler* masm,
|
|
const methodHandle& method,
|
|
int compile_id,
|
|
BasicType* sig_bt,
|
|
VMRegPair* regs,
|
|
BasicType ret_type);
|
|
|
|
// Block before entering a JNI critical method
|
|
static void block_for_jni_critical(JavaThread* thread);
|
|
|
|
// A compiled caller has just called the interpreter, but compiled code
|
|
// exists. Patch the caller so he no longer calls into the interpreter.
|
|
static void fixup_callers_callsite(Method* moop, address ret_pc);
|
|
static bool should_fixup_call_destination(address destination, address entry_point, address caller_pc, Method* moop, CodeBlob* cb);
|
|
|
|
// Slow-path Locking and Unlocking
|
|
static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* thread);
|
|
static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock, JavaThread* thread);
|
|
|
|
// Resolving of calls
|
|
static address resolve_static_call_C (JavaThread *thread);
|
|
static address resolve_virtual_call_C (JavaThread *thread);
|
|
static address resolve_opt_virtual_call_C(JavaThread *thread);
|
|
|
|
// arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.)
|
|
static void slow_arraycopy_C(oopDesc* src, jint src_pos,
|
|
oopDesc* dest, jint dest_pos,
|
|
jint length, JavaThread* thread);
|
|
|
|
// handle ic miss with caller being compiled code
|
|
// wrong method handling (inline cache misses, zombie methods)
|
|
static address handle_wrong_method(JavaThread* thread);
|
|
static address handle_wrong_method_abstract(JavaThread* thread);
|
|
static address handle_wrong_method_ic_miss(JavaThread* thread);
|
|
|
|
#ifndef PRODUCT
|
|
|
|
// Collect and print inline cache miss statistics
|
|
private:
|
|
enum { maxICmiss_count = 100 };
|
|
static int _ICmiss_index; // length of IC miss histogram
|
|
static int _ICmiss_count[maxICmiss_count]; // miss counts
|
|
static address _ICmiss_at[maxICmiss_count]; // miss addresses
|
|
static void trace_ic_miss(address at);
|
|
|
|
public:
|
|
static int _throw_null_ctr; // throwing a null-pointer exception
|
|
static int _ic_miss_ctr; // total # of IC misses
|
|
static int _wrong_method_ctr;
|
|
static int _resolve_static_ctr;
|
|
static int _resolve_virtual_ctr;
|
|
static int _resolve_opt_virtual_ctr;
|
|
static int _implicit_null_throws;
|
|
static int _implicit_div0_throws;
|
|
|
|
static int _jbyte_array_copy_ctr; // Slow-path byte array copy
|
|
static int _jshort_array_copy_ctr; // Slow-path short array copy
|
|
static int _jint_array_copy_ctr; // Slow-path int array copy
|
|
static int _jlong_array_copy_ctr; // Slow-path long array copy
|
|
static int _oop_array_copy_ctr; // Slow-path oop array copy
|
|
static int _checkcast_array_copy_ctr; // Slow-path oop array copy, with cast
|
|
static int _unsafe_array_copy_ctr; // Slow-path includes alignment checks
|
|
static int _generic_array_copy_ctr; // Slow-path includes type decoding
|
|
static int _slow_array_copy_ctr; // Slow-path failed out to a method call
|
|
|
|
static int _new_instance_ctr; // 'new' object requires GC
|
|
static int _new_array_ctr; // 'new' array requires GC
|
|
static int _multi1_ctr, _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr;
|
|
static int _find_handler_ctr; // find exception handler
|
|
static int _rethrow_ctr; // rethrow exception
|
|
static int _mon_enter_stub_ctr; // monitor enter stub
|
|
static int _mon_exit_stub_ctr; // monitor exit stub
|
|
static int _mon_enter_ctr; // monitor enter slow
|
|
static int _mon_exit_ctr; // monitor exit slow
|
|
static int _partial_subtype_ctr; // SubRoutines::partial_subtype_check
|
|
|
|
// Statistics code
|
|
// stats for "normal" compiled calls (non-interface)
|
|
static int _nof_normal_calls; // total # of calls
|
|
static int _nof_optimized_calls; // total # of statically-bound calls
|
|
static int _nof_inlined_calls; // total # of inlined normal calls
|
|
static int _nof_static_calls; // total # of calls to static methods or super methods (invokespecial)
|
|
static int _nof_inlined_static_calls; // total # of inlined static calls
|
|
// stats for compiled interface calls
|
|
static int _nof_interface_calls; // total # of compiled calls
|
|
static int _nof_optimized_interface_calls; // total # of statically-bound interface calls
|
|
static int _nof_inlined_interface_calls; // total # of inlined interface calls
|
|
static int _nof_megamorphic_interface_calls;// total # of megamorphic interface calls
|
|
// stats for runtime exceptions
|
|
static int _nof_removable_exceptions; // total # of exceptions that could be replaced by branches due to inlining
|
|
|
|
public: // for compiler
|
|
static address nof_normal_calls_addr() { return (address)&_nof_normal_calls; }
|
|
static address nof_optimized_calls_addr() { return (address)&_nof_optimized_calls; }
|
|
static address nof_inlined_calls_addr() { return (address)&_nof_inlined_calls; }
|
|
static address nof_static_calls_addr() { return (address)&_nof_static_calls; }
|
|
static address nof_inlined_static_calls_addr() { return (address)&_nof_inlined_static_calls; }
|
|
static address nof_interface_calls_addr() { return (address)&_nof_interface_calls; }
|
|
static address nof_optimized_interface_calls_addr() { return (address)&_nof_optimized_interface_calls; }
|
|
static address nof_inlined_interface_calls_addr() { return (address)&_nof_inlined_interface_calls; }
|
|
static address nof_megamorphic_interface_calls_addr() { return (address)&_nof_megamorphic_interface_calls; }
|
|
static void print_call_statistics(int comp_total);
|
|
static void print_statistics();
|
|
static void print_ic_miss_histogram();
|
|
|
|
#endif // PRODUCT
|
|
};
|
|
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Implementation of AdapterHandlerLibrary
|
|
//
|
|
// This library manages argument marshaling adapters and native wrappers.
|
|
// There are 2 flavors of adapters: I2C and C2I.
|
|
//
|
|
// The I2C flavor takes a stock interpreted call setup, marshals the
|
|
// arguments for a Java-compiled call, and jumps to Rmethod-> code()->
|
|
// code_begin(). It is broken to call it without an nmethod assigned.
|
|
// The usual behavior is to lift any register arguments up out of the
|
|
// stack and possibly re-pack the extra arguments to be contiguous.
|
|
// I2C adapters will save what the interpreter's stack pointer will be
|
|
// after arguments are popped, then adjust the interpreter's frame
|
|
// size to force alignment and possibly to repack the arguments.
|
|
// After re-packing, it jumps to the compiled code start. There are
|
|
// no safepoints in this adapter code and a GC cannot happen while
|
|
// marshaling is in progress.
|
|
//
|
|
// The C2I flavor takes a stock compiled call setup plus the target method in
|
|
// Rmethod, marshals the arguments for an interpreted call and jumps to
|
|
// Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been
|
|
// setup. Compiled frames are fixed-size and the args are likely not in the
|
|
// right place. Hence all the args will likely be copied into the
|
|
// interpreter's frame, forcing that frame to grow. The compiled frame's
|
|
// outgoing stack args will be dead after the copy.
|
|
//
|
|
// Native wrappers, like adapters, marshal arguments. Unlike adapters they
|
|
// also perform an official frame push & pop. They have a call to the native
|
|
// routine in their middles and end in a return (instead of ending in a jump).
|
|
// The native wrappers are stored in real nmethods instead of the BufferBlobs
|
|
// used by the adapters. The code generation happens here because it's very
|
|
// similar to what the adapters have to do.
|
|
|
|
class AdapterHandlerEntry : public BasicHashtableEntry<mtCode> {
|
|
friend class AdapterHandlerTable;
|
|
|
|
private:
|
|
AdapterFingerPrint* _fingerprint;
|
|
address _i2c_entry;
|
|
address _c2i_entry;
|
|
address _c2i_unverified_entry;
|
|
|
|
#ifdef ASSERT
|
|
// Captures code and signature used to generate this adapter when
|
|
// verifying adapter equivalence.
|
|
unsigned char* _saved_code;
|
|
int _saved_code_length;
|
|
#endif
|
|
|
|
void init(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_unverified_entry) {
|
|
_fingerprint = fingerprint;
|
|
_i2c_entry = i2c_entry;
|
|
_c2i_entry = c2i_entry;
|
|
_c2i_unverified_entry = c2i_unverified_entry;
|
|
#ifdef ASSERT
|
|
_saved_code = NULL;
|
|
_saved_code_length = 0;
|
|
#endif
|
|
}
|
|
|
|
void deallocate();
|
|
|
|
// should never be used
|
|
AdapterHandlerEntry();
|
|
|
|
public:
|
|
address get_i2c_entry() const { return _i2c_entry; }
|
|
address get_c2i_entry() const { return _c2i_entry; }
|
|
address get_c2i_unverified_entry() const { return _c2i_unverified_entry; }
|
|
address base_address();
|
|
void relocate(address new_base);
|
|
|
|
AdapterFingerPrint* fingerprint() const { return _fingerprint; }
|
|
|
|
AdapterHandlerEntry* next() {
|
|
return (AdapterHandlerEntry*)BasicHashtableEntry<mtCode>::next();
|
|
}
|
|
|
|
#ifdef ASSERT
|
|
// Used to verify that code generated for shared adapters is equivalent
|
|
void save_code (unsigned char* code, int length);
|
|
bool compare_code(unsigned char* code, int length);
|
|
#endif
|
|
|
|
//virtual void print_on(outputStream* st) const; DO NOT USE
|
|
void print_adapter_on(outputStream* st) const;
|
|
};
|
|
|
|
class AdapterHandlerLibrary: public AllStatic {
|
|
private:
|
|
static BufferBlob* _buffer; // the temporary code buffer in CodeCache
|
|
static AdapterHandlerTable* _adapters;
|
|
static AdapterHandlerEntry* _abstract_method_handler;
|
|
static BufferBlob* buffer_blob();
|
|
static void initialize();
|
|
|
|
public:
|
|
|
|
static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint,
|
|
address i2c_entry, address c2i_entry, address c2i_unverified_entry);
|
|
static void create_native_wrapper(const methodHandle& method);
|
|
static AdapterHandlerEntry* get_adapter(const methodHandle& method);
|
|
|
|
static void print_handler(const CodeBlob* b) { print_handler_on(tty, b); }
|
|
static void print_handler_on(outputStream* st, const CodeBlob* b);
|
|
static bool contains(const CodeBlob* b);
|
|
#ifndef PRODUCT
|
|
static void print_statistics();
|
|
#endif // PRODUCT
|
|
|
|
};
|
|
|
|
#endif // SHARE_VM_RUNTIME_SHAREDRUNTIME_HPP
|