| /* |
| * 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<uint64_t>* _fingerprints; // the fingerprint collection |
| static GrowableArray<AdapterHandlerEntry*> * _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 */ |
| |
| }; |
