diff -r fd16c54261b3 -r 489c9b5090e2 hotspot/src/share/vm/runtime/sharedRuntime.hpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/hotspot/src/share/vm/runtime/sharedRuntime.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,536 @@ +/* + * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +class AdapterHandlerEntry; +class vframeStream; + +// Runtime is the base class for various runtime interfaces +// (InterpreterRuntime, CompilerRuntime, etc.). It provides +// shared functionality such as exception forwarding (C++ to +// Java exceptions), locking/unlocking mechanisms, statistical +// information, etc. + +class SharedRuntime: AllStatic { + private: + static methodHandle resolve_sub_helper(JavaThread *thread, + bool is_virtual, + bool is_optimized, TRAPS); + + // Shared stub locations + + static RuntimeStub* _wrong_method_blob; + static RuntimeStub* _ic_miss_blob; + static RuntimeStub* _resolve_opt_virtual_call_blob; + static RuntimeStub* _resolve_virtual_call_blob; + static RuntimeStub* _resolve_static_call_blob; + + static SafepointBlob* _polling_page_safepoint_handler_blob; + static SafepointBlob* _polling_page_return_handler_blob; +#ifdef COMPILER2 + static ExceptionBlob* _exception_blob; + static UncommonTrapBlob* _uncommon_trap_blob; +#endif // COMPILER2 + +#ifndef PRODUCT + + // Counters + static int _nof_megamorphic_calls; // total # of megamorphic calls (through vtable) + +#endif // !PRODUCT + public: + // The following arithmetic routines are used on platforms that do + // not have machine instructions to implement their functionality. + // Do not remove these. + + // long arithmetics + static jlong lmul(jlong y, jlong x); + static jlong ldiv(jlong y, jlong x); + static jlong lrem(jlong y, jlong x); + + // float and double remainder + static jfloat frem(jfloat x, jfloat y); + static jdouble drem(jdouble x, jdouble y); + + // float conversion (needs to set appropriate rounding mode) + static jint f2i (jfloat x); + static jlong f2l (jfloat x); + static jint d2i (jdouble x); + static jlong d2l (jdouble x); + static jfloat d2f (jdouble x); + static jfloat l2f (jlong x); + static jdouble l2d (jlong x); + + // double trigonometrics and transcendentals + static jdouble dsin(jdouble x); + static jdouble dcos(jdouble x); + static jdouble dtan(jdouble x); + static jdouble dlog(jdouble x); + static jdouble dlog10(jdouble x); + static jdouble dexp(jdouble x); + static jdouble dpow(jdouble x, jdouble y); + + + // exception handling across interpreter/compiler boundaries + static address raw_exception_handler_for_return_address(address return_address); + static address exception_handler_for_return_address(address return_address); + + // exception handling and implicit exceptions + static address compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception, + bool force_unwind, bool top_frame_only); + enum ImplicitExceptionKind { + IMPLICIT_NULL, + IMPLICIT_DIVIDE_BY_ZERO, + STACK_OVERFLOW + }; + static void throw_AbstractMethodError(JavaThread* thread); + static void throw_ArithmeticException(JavaThread* thread); + static void throw_NullPointerException(JavaThread* thread); + static void throw_NullPointerException_at_call(JavaThread* thread); + static void throw_StackOverflowError(JavaThread* thread); + static address continuation_for_implicit_exception(JavaThread* thread, + address faulting_pc, + ImplicitExceptionKind exception_kind); + + // Shared stub locations + static address get_poll_stub(address pc); + + static address get_ic_miss_stub() { + assert(_ic_miss_blob!= NULL, "oops"); + return _ic_miss_blob->instructions_begin(); + } + + static address get_handle_wrong_method_stub() { + assert(_wrong_method_blob!= NULL, "oops"); + return _wrong_method_blob->instructions_begin(); + } + +#ifdef COMPILER2 + static void generate_uncommon_trap_blob(void); + static UncommonTrapBlob* uncommon_trap_blob() { return _uncommon_trap_blob; } +#endif // COMPILER2 + + static address get_resolve_opt_virtual_call_stub(){ + assert(_resolve_opt_virtual_call_blob != NULL, "oops"); + return _resolve_opt_virtual_call_blob->instructions_begin(); + } + static address get_resolve_virtual_call_stub() { + assert(_resolve_virtual_call_blob != NULL, "oops"); + return _resolve_virtual_call_blob->instructions_begin(); + } + static address get_resolve_static_call_stub() { + assert(_resolve_static_call_blob != NULL, "oops"); + return _resolve_static_call_blob->instructions_begin(); + } + + static SafepointBlob* polling_page_return_handler_blob() { return _polling_page_return_handler_blob; } + static SafepointBlob* polling_page_safepoint_handler_blob() { return _polling_page_safepoint_handler_blob; } + + // Counters +#ifndef PRODUCT + static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; } +#endif // PRODUCT + + // Helper routine for full-speed JVMTI exception throwing support + static void throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception); + static void throw_and_post_jvmti_exception(JavaThread *thread, symbolOop name, const char *message = NULL); + + // To be used as the entry point for unresolved native methods. + static address native_method_throw_unsatisfied_link_error_entry(); + + // bytecode tracing is only used by the TraceBytecodes + static intptr_t trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2) PRODUCT_RETURN0; + + // Used to back off a spin lock that is under heavy contention + static void yield_all(JavaThread* thread, int attempts = 0); + + static oop retrieve_receiver( symbolHandle sig, frame caller ); + + static void verify_caller_frame(frame caller_frame, methodHandle callee_method) PRODUCT_RETURN; + static methodHandle find_callee_method_inside_interpreter(frame caller_frame, methodHandle caller_method, int bci) PRODUCT_RETURN_(return methodHandle();); + + static void register_finalizer(JavaThread* thread, oopDesc* obj); + + // dtrace notifications + static int dtrace_object_alloc(oopDesc* o); + static int dtrace_object_alloc_base(Thread* thread, oopDesc* o); + static int dtrace_method_entry(JavaThread* thread, methodOopDesc* m); + static int dtrace_method_exit(JavaThread* thread, methodOopDesc* m); + + // Utility method for retrieving the Java thread id, returns 0 if the + // thread is not a well formed Java thread. + static jlong get_java_tid(Thread* thread); + + + // used by native wrappers to reenable yellow if overflow happened in native code + static void reguard_yellow_pages(); + + /** + * Fill in the "X cannot be cast to a Y" message for ClassCastException + * + * @param thr the current thread + * @param name the name of the class of the object attempted to be cast + * @return the dynamically allocated exception message (must be freed + * by the caller using a resource mark) + * + * BCP must refer to the current 'checkcast' opcode for the frame + * on top of the stack. + * The caller (or one of it's callers) must use a ResourceMark + * in order to correctly free the result. + */ + static char* generate_class_cast_message(JavaThread* thr, const char* name); + + /** + * Fill in the "X cannot be cast to a Y" message for ClassCastException + * + * @param name the name of the class of the object attempted to be cast + * @param klass the name of the target klass attempt + * @return the dynamically allocated exception message (must be freed + * by the caller using a resource mark) + * + * This version does not require access the frame, so it can be called + * from interpreted code + * The caller (or one of it's callers) must use a ResourceMark + * in order to correctly free the result. + */ + static char* generate_class_cast_message(const char* name, const char* klass); + + // Resolves a call site- may patch in the destination of the call into the + // compiled code. + static methodHandle resolve_helper(JavaThread *thread, + bool is_virtual, + bool is_optimized, TRAPS); + + static void generate_stubs(void); + + private: + // deopt blob + static void generate_deopt_blob(void); + static DeoptimizationBlob* _deopt_blob; + + public: + static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; } + + // Resets a call-site in compiled code so it will get resolved again. + static methodHandle reresolve_call_site(JavaThread *thread, TRAPS); + + // In the code prolog, if the klass comparison fails, the inline cache + // misses and the call site is patched to megamorphic + static methodHandle handle_ic_miss_helper(JavaThread* thread, TRAPS); + + // Find the method that called us. + static methodHandle find_callee_method(JavaThread* thread, TRAPS); + + + private: + static Handle find_callee_info(JavaThread* thread, + Bytecodes::Code& bc, + CallInfo& callinfo, TRAPS); + static Handle find_callee_info_helper(JavaThread* thread, + vframeStream& vfst, + Bytecodes::Code& bc, + CallInfo& callinfo, TRAPS); + + static address clean_virtual_call_entry(); + static address clean_opt_virtual_call_entry(); + static address clean_static_call_entry(); + + public: + + + static void create_native_wrapper (JavaThread* thread, methodOop method); + + // Read the array of BasicTypes from a Java signature, and compute where + // compiled Java code would like to put the results. Values in reg_lo and + // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are + // registers, those above refer to 4-byte stack slots. All stack slots are + // based off of the window top. SharedInfo::stack0 refers to the first usable + // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word + // 4-bytes higher. So for sparc because the register window save area is at + // the bottom of the frame the first 16 words will be skipped and SharedInfo::stack0 + // will be just above it. ( + // return value is the maximum number of VMReg stack slots the convention will use. + static int java_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed, int is_outgoing); + + // Ditto except for calling C + static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed); + + // Generate I2C and C2I adapters. These adapters are simple argument marshalling + // blobs. Unlike adapters in the tiger and earlier releases the code in these + // blobs does not create a new frame and are therefore virtually invisible + // to the stack walking code. In general these blobs extend the callers stack + // as needed for the conversion of argument locations. + + // When calling a c2i blob the code will always call the interpreter even if + // by the time we reach the blob there is compiled code available. This allows + // the blob to pass the incoming stack pointer (the sender sp) in a known + // location for the interpreter to record. This is used by the frame code + // to correct the sender code to match up with the stack pointer when the + // thread left the compiled code. In addition it allows the interpreter + // to remove the space the c2i adapter allocated to do it argument conversion. + + // Although a c2i blob will always run interpreted even if compiled code is + // present if we see that compiled code is present the compiled call site + // will be patched/re-resolved so that later calls will run compiled. + + // Aditionally a c2i blob need to have a unverified entry because it can be reached + // in situations where the call site is an inlined cache site and may go megamorphic. + + // A i2c adapter is simpler than the c2i adapter. This is because it is assumed + // that the interpreter before it does any call dispatch will record the current + // stack pointer in the interpreter frame. On return it will restore the stack + // pointer as needed. This means the i2c adapter code doesn't need any special + // handshaking path with compiled code to keep the stack walking correct. + + static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *_masm, + int total_args_passed, + int max_arg, + const BasicType *sig_bt, + const VMRegPair *regs); + + // OSR support + + // OSR_migration_begin will extract the jvm state from an interpreter + // frame (locals, monitors) and store the data in a piece of C heap + // storage. This then allows the interpreter frame to be removed from the + // stack and the OSR nmethod to be called. That method is called with a + // pointer to the C heap storage. This pointer is the return value from + // OSR_migration_begin. + + static intptr_t* OSR_migration_begin( JavaThread *thread); + + // OSR_migration_end is a trivial routine. It is called after the compiled + // method has extracted the jvm state from the C heap that OSR_migration_begin + // 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(symbolOop sig, bool is_static, 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(); + + // 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. + static nmethod *generate_native_wrapper(MacroAssembler* masm, + methodHandle method, + int total_args_passed, + int max_arg, + BasicType *sig_bt, + VMRegPair *regs, + BasicType ret_type ); + + // 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(methodOopDesc* moop, address ret_pc); + + // 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); + + // 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_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 _monitor_enter_ctr; // monitor enter slow + static int _monitor_exit_ctr; // monitor exit slow + 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()-> +// 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: + 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) { + } + // The name we give all buffer blobs + static const char* name; + + 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: + enum { + AbstractMethodHandler = 1 // special handler for abstract methods + }; + static GrowableArray* _fingerprints; // the fingerprint collection + static GrowableArray * _handlers; // the corresponding handlers + static u_char _buffer[]; // the temporary code buffer + static void initialize(); + static AdapterHandlerEntry* get_entry( int index ) { return _handlers->at(index); } + 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 nmethod* create_native_wrapper(methodHandle method); + static AdapterHandlerEntry* get_adapter(methodHandle method) { return get_entry(get_create_adapter_index(method)); } + +#ifndef PRODUCT + static void print_handler(CodeBlob* b); + static bool contains(CodeBlob* b); +#endif /* PRODUCT */ + +};