571 lines
26 KiB
C++
571 lines
26 KiB
C++
/*
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* Copyright 1997-2008 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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class AdapterHandlerEntry;
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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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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* _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 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 ExceptionBlob* _exception_blob;
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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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public:
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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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// 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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// 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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// exception handling across interpreter/compiler boundaries
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static address raw_exception_handler_for_return_address(address return_address);
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static address exception_handler_for_return_address(address return_address);
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#ifndef SERIALGC
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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 // !SERIALGC
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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 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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// 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->instructions_begin();
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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->instructions_begin();
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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->instructions_begin();
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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->instructions_begin();
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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->instructions_begin();
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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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// 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, symbolOop name, const char *message = NULL);
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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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// 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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// Used to back off a spin lock that is under heavy contention
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static void yield_all(JavaThread* thread, int attempts = 0);
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static oop retrieve_receiver( symbolHandle sig, frame caller );
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static void verify_caller_frame(frame caller_frame, methodHandle callee_method) PRODUCT_RETURN;
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static methodHandle find_callee_method_inside_interpreter(frame caller_frame, methodHandle caller_method, int bci) PRODUCT_RETURN_(return methodHandle(););
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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);
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static int dtrace_object_alloc_base(Thread* thread, oopDesc* o);
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static int dtrace_method_entry(JavaThread* thread, methodOopDesc* m);
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static int dtrace_method_exit(JavaThread* thread, methodOopDesc* 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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/**
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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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/**
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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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* @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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// 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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static void generate_stubs(void);
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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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static DeoptimizationBlob* _deopt_blob;
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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 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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// Ditto except for calling C
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static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed);
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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 it 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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// Aditionally 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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// 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.
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static void OSR_migration_end ( intptr_t* buf);
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// Convert a sig into a calling convention register layout
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// and find interesting things about it.
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static VMRegPair* find_callee_arguments(symbolOop sig, bool is_static, int *arg_size);
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static VMReg name_for_receiver();
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// "Top of Stack" slots that may be unused by the calling convention but must
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// otherwise be preserved.
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// On Intel these are not necessary and the value can be zero.
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// On Sparc this describes the words reserved for storing a register window
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// when an interrupt occurs.
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static uint out_preserve_stack_slots();
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// Save and restore a native result
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static void save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots );
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static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots );
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// Generate a native wrapper for a given method. The method takes arguments
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// in the Java compiled code convention, marshals them to the native
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// convention (handlizes oops, etc), transitions to native, makes the call,
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// returns to java state (possibly blocking), unhandlizes any result and
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// returns.
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static nmethod *generate_native_wrapper(MacroAssembler* masm,
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methodHandle method,
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int total_args_passed,
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int max_arg,
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BasicType *sig_bt,
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VMRegPair *regs,
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BasicType ret_type );
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#ifdef HAVE_DTRACE_H
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// Generate a dtrace wrapper for a given method. The method takes arguments
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// in the Java compiled code convention, marshals them to the native
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// convention (handlizes oops, etc), transitions to native, makes the call,
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// returns to java state (possibly blocking), unhandlizes any result and
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// returns.
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static nmethod *generate_dtrace_nmethod(MacroAssembler* masm,
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methodHandle method);
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// dtrace support to convert a Java string to utf8
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static void get_utf(oopDesc* src, address dst);
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#endif // def HAVE_DTRACE_H
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// A compiled caller has just called the interpreter, but compiled code
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// exists. Patch the caller so he no longer calls into the interpreter.
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static void fixup_callers_callsite(methodOopDesc* moop, address ret_pc);
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// Slow-path Locking and Unlocking
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static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* thread);
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static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock);
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// Resolving of calls
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static address resolve_static_call_C (JavaThread *thread);
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static address resolve_virtual_call_C (JavaThread *thread);
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static address resolve_opt_virtual_call_C(JavaThread *thread);
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// arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.)
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static void slow_arraycopy_C(oopDesc* src, jint src_pos,
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oopDesc* dest, jint dest_pos,
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jint length, JavaThread* thread);
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// handle ic miss with caller being compiled code
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// wrong method handling (inline cache misses, zombie methods)
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static address handle_wrong_method(JavaThread* thread);
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static address handle_wrong_method_ic_miss(JavaThread* thread);
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#ifndef PRODUCT
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// Collect and print inline cache miss statistics
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private:
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enum { maxICmiss_count = 100 };
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static int _ICmiss_index; // length of IC miss histogram
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static int _ICmiss_count[maxICmiss_count]; // miss counts
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static address _ICmiss_at[maxICmiss_count]; // miss addresses
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static void trace_ic_miss(address at);
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public:
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static int _monitor_enter_ctr; // monitor enter slow
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static int _monitor_exit_ctr; // monitor exit slow
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static int _throw_null_ctr; // throwing a null-pointer exception
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static int _ic_miss_ctr; // total # of IC misses
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static int _wrong_method_ctr;
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static int _resolve_static_ctr;
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static int _resolve_virtual_ctr;
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static int _resolve_opt_virtual_ctr;
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static int _implicit_null_throws;
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static int _implicit_div0_throws;
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static int _jbyte_array_copy_ctr; // Slow-path byte array copy
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static int _jshort_array_copy_ctr; // Slow-path short array copy
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static int _jint_array_copy_ctr; // Slow-path int array copy
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static int _jlong_array_copy_ctr; // Slow-path long array copy
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static int _oop_array_copy_ctr; // Slow-path oop array copy
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static int _checkcast_array_copy_ctr; // Slow-path oop array copy, with cast
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static int _unsafe_array_copy_ctr; // Slow-path includes alignment checks
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static int _generic_array_copy_ctr; // Slow-path includes type decoding
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static int _slow_array_copy_ctr; // Slow-path failed out to a method call
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static int _new_instance_ctr; // 'new' object requires GC
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static int _new_array_ctr; // 'new' array requires GC
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static int _multi1_ctr, _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr;
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static int _find_handler_ctr; // find exception handler
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static int _rethrow_ctr; // rethrow exception
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static int _mon_enter_stub_ctr; // monitor enter stub
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static int _mon_exit_stub_ctr; // monitor exit stub
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static int _mon_enter_ctr; // monitor enter slow
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static int _mon_exit_ctr; // monitor exit slow
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static int _partial_subtype_ctr; // SubRoutines::partial_subtype_check
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// Statistics code
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// stats for "normal" compiled calls (non-interface)
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static int _nof_normal_calls; // total # of calls
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static int _nof_optimized_calls; // total # of statically-bound calls
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static int _nof_inlined_calls; // total # of inlined normal calls
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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()->
|
|
// instructions_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 contigious. 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 offical 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 CHeapObj {
|
|
private:
|
|
address _i2c_entry;
|
|
address _c2i_entry;
|
|
address _c2i_unverified_entry;
|
|
|
|
public:
|
|
|
|
// The name we give all buffer blobs
|
|
static const char* name;
|
|
|
|
AdapterHandlerEntry(address i2c_entry, address c2i_entry, address c2i_unverified_entry):
|
|
_i2c_entry(i2c_entry),
|
|
_c2i_entry(c2i_entry),
|
|
_c2i_unverified_entry(c2i_unverified_entry) {
|
|
}
|
|
|
|
address get_i2c_entry() { return _i2c_entry; }
|
|
address get_c2i_entry() { return _c2i_entry; }
|
|
address get_c2i_unverified_entry() { return _c2i_unverified_entry; }
|
|
|
|
void relocate(address new_base);
|
|
#ifndef PRODUCT
|
|
void print();
|
|
#endif /* PRODUCT */
|
|
};
|
|
|
|
class AdapterHandlerLibrary: public AllStatic {
|
|
private:
|
|
static u_char _buffer[]; // the temporary code buffer
|
|
static GrowableArray<uint64_t>* _fingerprints; // the fingerprint collection
|
|
static GrowableArray<AdapterHandlerEntry*> * _handlers; // the corresponding handlers
|
|
enum {
|
|
AbstractMethodHandler = 1 // special handler for abstract methods
|
|
};
|
|
static void initialize();
|
|
static int get_create_adapter_index(methodHandle method);
|
|
static address get_i2c_entry( int index ) {
|
|
return get_entry(index)->get_i2c_entry();
|
|
}
|
|
static address get_c2i_entry( int index ) {
|
|
return get_entry(index)->get_c2i_entry();
|
|
}
|
|
static address get_c2i_unverified_entry( int index ) {
|
|
return get_entry(index)->get_c2i_unverified_entry();
|
|
}
|
|
|
|
public:
|
|
static AdapterHandlerEntry* get_entry( int index ) { return _handlers->at(index); }
|
|
static nmethod* create_native_wrapper(methodHandle method);
|
|
static AdapterHandlerEntry* get_adapter(methodHandle method) {
|
|
return get_entry(get_create_adapter_index(method));
|
|
}
|
|
#ifdef HAVE_DTRACE_H
|
|
static nmethod* create_dtrace_nmethod (methodHandle method);
|
|
#endif // HAVE_DTRACE_H
|
|
|
|
#ifndef PRODUCT
|
|
static void print_handler(CodeBlob* b);
|
|
static bool contains(CodeBlob* b);
|
|
#endif /* PRODUCT */
|
|
|
|
};
|