1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/runtime/sharedRuntime.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,703 @@
1.4 +/*
1.5 + * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_RUNTIME_SHAREDRUNTIME_HPP
1.29 +#define SHARE_VM_RUNTIME_SHAREDRUNTIME_HPP
1.30 +
1.31 +#include "interpreter/bytecodeHistogram.hpp"
1.32 +#include "interpreter/bytecodeTracer.hpp"
1.33 +#include "interpreter/linkResolver.hpp"
1.34 +#include "memory/allocation.hpp"
1.35 +#include "memory/resourceArea.hpp"
1.36 +#include "runtime/threadLocalStorage.hpp"
1.37 +#include "utilities/hashtable.hpp"
1.38 +#include "utilities/macros.hpp"
1.39 +
1.40 +class AdapterHandlerEntry;
1.41 +class AdapterHandlerTable;
1.42 +class AdapterFingerPrint;
1.43 +class vframeStream;
1.44 +
1.45 +// Runtime is the base class for various runtime interfaces
1.46 +// (InterpreterRuntime, CompilerRuntime, etc.). It provides
1.47 +// shared functionality such as exception forwarding (C++ to
1.48 +// Java exceptions), locking/unlocking mechanisms, statistical
1.49 +// information, etc.
1.50 +
1.51 +class SharedRuntime: AllStatic {
1.52 + friend class VMStructs;
1.53 +
1.54 + private:
1.55 + static methodHandle resolve_sub_helper(JavaThread *thread,
1.56 + bool is_virtual,
1.57 + bool is_optimized, TRAPS);
1.58 +
1.59 + // Shared stub locations
1.60 +
1.61 + static RuntimeStub* _wrong_method_blob;
1.62 + static RuntimeStub* _wrong_method_abstract_blob;
1.63 + static RuntimeStub* _ic_miss_blob;
1.64 + static RuntimeStub* _resolve_opt_virtual_call_blob;
1.65 + static RuntimeStub* _resolve_virtual_call_blob;
1.66 + static RuntimeStub* _resolve_static_call_blob;
1.67 +
1.68 + static DeoptimizationBlob* _deopt_blob;
1.69 +
1.70 + static SafepointBlob* _polling_page_vectors_safepoint_handler_blob;
1.71 + static SafepointBlob* _polling_page_safepoint_handler_blob;
1.72 + static SafepointBlob* _polling_page_return_handler_blob;
1.73 +
1.74 +#ifdef COMPILER2
1.75 + static UncommonTrapBlob* _uncommon_trap_blob;
1.76 +#endif // COMPILER2
1.77 +
1.78 +#ifndef PRODUCT
1.79 + // Counters
1.80 + static int _nof_megamorphic_calls; // total # of megamorphic calls (through vtable)
1.81 +#endif // !PRODUCT
1.82 +
1.83 + private:
1.84 + enum { POLL_AT_RETURN, POLL_AT_LOOP, POLL_AT_VECTOR_LOOP };
1.85 + static SafepointBlob* generate_handler_blob(address call_ptr, int poll_type);
1.86 + static RuntimeStub* generate_resolve_blob(address destination, const char* name);
1.87 +
1.88 + public:
1.89 + static void generate_stubs(void);
1.90 +
1.91 + // max bytes for each dtrace string parameter
1.92 + enum { max_dtrace_string_size = 256 };
1.93 +
1.94 + // The following arithmetic routines are used on platforms that do
1.95 + // not have machine instructions to implement their functionality.
1.96 + // Do not remove these.
1.97 +
1.98 + // long arithmetics
1.99 + static jlong lmul(jlong y, jlong x);
1.100 + static jlong ldiv(jlong y, jlong x);
1.101 + static jlong lrem(jlong y, jlong x);
1.102 +
1.103 + // float and double remainder
1.104 + static jfloat frem(jfloat x, jfloat y);
1.105 + static jdouble drem(jdouble x, jdouble y);
1.106 +
1.107 +#ifdef __SOFTFP__
1.108 + static jfloat fadd(jfloat x, jfloat y);
1.109 + static jfloat fsub(jfloat x, jfloat y);
1.110 + static jfloat fmul(jfloat x, jfloat y);
1.111 + static jfloat fdiv(jfloat x, jfloat y);
1.112 +
1.113 + static jdouble dadd(jdouble x, jdouble y);
1.114 + static jdouble dsub(jdouble x, jdouble y);
1.115 + static jdouble dmul(jdouble x, jdouble y);
1.116 + static jdouble ddiv(jdouble x, jdouble y);
1.117 +#endif // __SOFTFP__
1.118 +
1.119 + // float conversion (needs to set appropriate rounding mode)
1.120 + static jint f2i (jfloat x);
1.121 + static jlong f2l (jfloat x);
1.122 + static jint d2i (jdouble x);
1.123 + static jlong d2l (jdouble x);
1.124 + static jfloat d2f (jdouble x);
1.125 + static jfloat l2f (jlong x);
1.126 + static jdouble l2d (jlong x);
1.127 +
1.128 +#ifdef __SOFTFP__
1.129 + static jfloat i2f (jint x);
1.130 + static jdouble i2d (jint x);
1.131 + static jdouble f2d (jfloat x);
1.132 +#endif // __SOFTFP__
1.133 +
1.134 + // double trigonometrics and transcendentals
1.135 + static jdouble dsin(jdouble x);
1.136 + static jdouble dcos(jdouble x);
1.137 + static jdouble dtan(jdouble x);
1.138 + static jdouble dlog(jdouble x);
1.139 + static jdouble dlog10(jdouble x);
1.140 + static jdouble dexp(jdouble x);
1.141 + static jdouble dpow(jdouble x, jdouble y);
1.142 +
1.143 +#if defined(__SOFTFP__) || defined(E500V2)
1.144 + static double dabs(double f);
1.145 +#endif
1.146 +
1.147 +#if defined(__SOFTFP__) || defined(PPC32)
1.148 + static double dsqrt(double f);
1.149 +#endif
1.150 +
1.151 +#ifdef __SOFTFP__
1.152 + // C++ compiler generates soft float instructions as well as passing
1.153 + // float and double in registers.
1.154 + static int fcmpl(float x, float y);
1.155 + static int fcmpg(float x, float y);
1.156 + static int dcmpl(double x, double y);
1.157 + static int dcmpg(double x, double y);
1.158 +
1.159 + static int unordered_fcmplt(float x, float y);
1.160 + static int unordered_dcmplt(double x, double y);
1.161 + static int unordered_fcmple(float x, float y);
1.162 + static int unordered_dcmple(double x, double y);
1.163 + static int unordered_fcmpge(float x, float y);
1.164 + static int unordered_dcmpge(double x, double y);
1.165 + static int unordered_fcmpgt(float x, float y);
1.166 + static int unordered_dcmpgt(double x, double y);
1.167 +
1.168 + static float fneg(float f);
1.169 + static double dneg(double f);
1.170 +#endif
1.171 +
1.172 + // exception handling across interpreter/compiler boundaries
1.173 + static address raw_exception_handler_for_return_address(JavaThread* thread, address return_address);
1.174 + static address exception_handler_for_return_address(JavaThread* thread, address return_address);
1.175 +
1.176 +#if INCLUDE_ALL_GCS
1.177 + // G1 write barriers
1.178 + static void g1_wb_pre(oopDesc* orig, JavaThread *thread);
1.179 + static void g1_wb_post(void* card_addr, JavaThread* thread);
1.180 +#endif // INCLUDE_ALL_GCS
1.181 +
1.182 + // exception handling and implicit exceptions
1.183 + static address compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception,
1.184 + bool force_unwind, bool top_frame_only);
1.185 + enum ImplicitExceptionKind {
1.186 + IMPLICIT_NULL,
1.187 + IMPLICIT_DIVIDE_BY_ZERO,
1.188 + STACK_OVERFLOW
1.189 + };
1.190 + static void throw_AbstractMethodError(JavaThread* thread);
1.191 + static void throw_IncompatibleClassChangeError(JavaThread* thread);
1.192 + static void throw_ArithmeticException(JavaThread* thread);
1.193 + static void throw_NullPointerException(JavaThread* thread);
1.194 + static void throw_NullPointerException_at_call(JavaThread* thread);
1.195 + static void throw_StackOverflowError(JavaThread* thread);
1.196 + static address continuation_for_implicit_exception(JavaThread* thread,
1.197 + address faulting_pc,
1.198 + ImplicitExceptionKind exception_kind);
1.199 +
1.200 + // Shared stub locations
1.201 + static address get_poll_stub(address pc);
1.202 +
1.203 + static address get_ic_miss_stub() {
1.204 + assert(_ic_miss_blob!= NULL, "oops");
1.205 + return _ic_miss_blob->entry_point();
1.206 + }
1.207 +
1.208 + static address get_handle_wrong_method_stub() {
1.209 + assert(_wrong_method_blob!= NULL, "oops");
1.210 + return _wrong_method_blob->entry_point();
1.211 + }
1.212 +
1.213 + static address get_handle_wrong_method_abstract_stub() {
1.214 + assert(_wrong_method_abstract_blob!= NULL, "oops");
1.215 + return _wrong_method_abstract_blob->entry_point();
1.216 + }
1.217 +
1.218 +#ifdef COMPILER2
1.219 + static void generate_uncommon_trap_blob(void);
1.220 + static UncommonTrapBlob* uncommon_trap_blob() { return _uncommon_trap_blob; }
1.221 +#endif // COMPILER2
1.222 +
1.223 + static address get_resolve_opt_virtual_call_stub(){
1.224 + assert(_resolve_opt_virtual_call_blob != NULL, "oops");
1.225 + return _resolve_opt_virtual_call_blob->entry_point();
1.226 + }
1.227 + static address get_resolve_virtual_call_stub() {
1.228 + assert(_resolve_virtual_call_blob != NULL, "oops");
1.229 + return _resolve_virtual_call_blob->entry_point();
1.230 + }
1.231 + static address get_resolve_static_call_stub() {
1.232 + assert(_resolve_static_call_blob != NULL, "oops");
1.233 + return _resolve_static_call_blob->entry_point();
1.234 + }
1.235 +
1.236 + static SafepointBlob* polling_page_return_handler_blob() { return _polling_page_return_handler_blob; }
1.237 + static SafepointBlob* polling_page_safepoint_handler_blob() { return _polling_page_safepoint_handler_blob; }
1.238 + static SafepointBlob* polling_page_vectors_safepoint_handler_blob() { return _polling_page_vectors_safepoint_handler_blob; }
1.239 +
1.240 + // Counters
1.241 +#ifndef PRODUCT
1.242 + static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; }
1.243 +#endif // PRODUCT
1.244 +
1.245 + // Helper routine for full-speed JVMTI exception throwing support
1.246 + static void throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception);
1.247 + static void throw_and_post_jvmti_exception(JavaThread *thread, Symbol* name, const char *message = NULL);
1.248 +
1.249 + // RedefineClasses() tracing support for obsolete method entry
1.250 + static int rc_trace_method_entry(JavaThread* thread, Method* m);
1.251 +
1.252 + // To be used as the entry point for unresolved native methods.
1.253 + static address native_method_throw_unsatisfied_link_error_entry();
1.254 + static address native_method_throw_unsupported_operation_exception_entry();
1.255 +
1.256 + // bytecode tracing is only used by the TraceBytecodes
1.257 + static intptr_t trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2) PRODUCT_RETURN0;
1.258 +
1.259 + // Used to back off a spin lock that is under heavy contention
1.260 + static void yield_all(JavaThread* thread, int attempts = 0);
1.261 +
1.262 + static oop retrieve_receiver( Symbol* sig, frame caller );
1.263 +
1.264 + static void register_finalizer(JavaThread* thread, oopDesc* obj);
1.265 +
1.266 + // dtrace notifications
1.267 + static int dtrace_object_alloc(oopDesc* o, int size);
1.268 + static int dtrace_object_alloc_base(Thread* thread, oopDesc* o, int size);
1.269 + static int dtrace_method_entry(JavaThread* thread, Method* m);
1.270 + static int dtrace_method_exit(JavaThread* thread, Method* m);
1.271 +
1.272 + // Utility method for retrieving the Java thread id, returns 0 if the
1.273 + // thread is not a well formed Java thread.
1.274 + static jlong get_java_tid(Thread* thread);
1.275 +
1.276 +
1.277 + // used by native wrappers to reenable yellow if overflow happened in native code
1.278 + static void reguard_yellow_pages();
1.279 +
1.280 + /**
1.281 + * Fill in the "X cannot be cast to a Y" message for ClassCastException
1.282 + *
1.283 + * @param thr the current thread
1.284 + * @param name the name of the class of the object attempted to be cast
1.285 + * @return the dynamically allocated exception message (must be freed
1.286 + * by the caller using a resource mark)
1.287 + *
1.288 + * BCP must refer to the current 'checkcast' opcode for the frame
1.289 + * on top of the stack.
1.290 + * The caller (or one of it's callers) must use a ResourceMark
1.291 + * in order to correctly free the result.
1.292 + */
1.293 + static char* generate_class_cast_message(JavaThread* thr, const char* name);
1.294 +
1.295 + /**
1.296 + * Fill in the "X cannot be cast to a Y" message for ClassCastException
1.297 + *
1.298 + * @param name the name of the class of the object attempted to be cast
1.299 + * @param klass the name of the target klass attempt
1.300 + * @param gripe the specific kind of problem being reported
1.301 + * @return the dynamically allocated exception message (must be freed
1.302 + * by the caller using a resource mark)
1.303 + *
1.304 + * This version does not require access the frame, so it can be called
1.305 + * from interpreted code
1.306 + * The caller (or one of it's callers) must use a ResourceMark
1.307 + * in order to correctly free the result.
1.308 + */
1.309 + static char* generate_class_cast_message(const char* name, const char* klass,
1.310 + const char* gripe = " cannot be cast to ");
1.311 +
1.312 + // Resolves a call site- may patch in the destination of the call into the
1.313 + // compiled code.
1.314 + static methodHandle resolve_helper(JavaThread *thread,
1.315 + bool is_virtual,
1.316 + bool is_optimized, TRAPS);
1.317 +
1.318 + private:
1.319 + // deopt blob
1.320 + static void generate_deopt_blob(void);
1.321 +
1.322 + public:
1.323 + static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; }
1.324 +
1.325 + // Resets a call-site in compiled code so it will get resolved again.
1.326 + static methodHandle reresolve_call_site(JavaThread *thread, TRAPS);
1.327 +
1.328 + // In the code prolog, if the klass comparison fails, the inline cache
1.329 + // misses and the call site is patched to megamorphic
1.330 + static methodHandle handle_ic_miss_helper(JavaThread* thread, TRAPS);
1.331 +
1.332 + // Find the method that called us.
1.333 + static methodHandle find_callee_method(JavaThread* thread, TRAPS);
1.334 +
1.335 +
1.336 + private:
1.337 + static Handle find_callee_info(JavaThread* thread,
1.338 + Bytecodes::Code& bc,
1.339 + CallInfo& callinfo, TRAPS);
1.340 + static Handle find_callee_info_helper(JavaThread* thread,
1.341 + vframeStream& vfst,
1.342 + Bytecodes::Code& bc,
1.343 + CallInfo& callinfo, TRAPS);
1.344 +
1.345 + static address clean_virtual_call_entry();
1.346 + static address clean_opt_virtual_call_entry();
1.347 + static address clean_static_call_entry();
1.348 +
1.349 + public:
1.350 +
1.351 + // Read the array of BasicTypes from a Java signature, and compute where
1.352 + // compiled Java code would like to put the results. Values in reg_lo and
1.353 + // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are
1.354 + // registers, those above refer to 4-byte stack slots. All stack slots are
1.355 + // based off of the window top. SharedInfo::stack0 refers to the first usable
1.356 + // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
1.357 + // 4-bytes higher. So for sparc because the register window save area is at
1.358 + // the bottom of the frame the first 16 words will be skipped and SharedInfo::stack0
1.359 + // will be just above it. (
1.360 + // return value is the maximum number of VMReg stack slots the convention will use.
1.361 + static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed, int is_outgoing);
1.362 +
1.363 + static void check_member_name_argument_is_last_argument(methodHandle method,
1.364 + const BasicType* sig_bt,
1.365 + const VMRegPair* regs) NOT_DEBUG_RETURN;
1.366 +
1.367 + // Ditto except for calling C
1.368 + //
1.369 + // C argument in register AND stack slot.
1.370 + // Some architectures require that an argument must be passed in a register
1.371 + // AND in a stack slot. These architectures provide a second VMRegPair array
1.372 + // to be filled by the c_calling_convention method. On other architectures,
1.373 + // NULL is being passed as the second VMRegPair array, so arguments are either
1.374 + // passed in a register OR in a stack slot.
1.375 + static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, VMRegPair *regs2,
1.376 + int total_args_passed);
1.377 +
1.378 + // Compute the new number of arguments in the signature if 32 bit ints
1.379 + // must be converted to longs. Needed if CCallingConventionRequiresIntsAsLongs
1.380 + // is true.
1.381 + static int convert_ints_to_longints_argcnt(int in_args_count, BasicType* in_sig_bt);
1.382 + // Adapt a method's signature if it contains 32 bit integers that must
1.383 + // be converted to longs. Needed if CCallingConventionRequiresIntsAsLongs
1.384 + // is true.
1.385 + static void convert_ints_to_longints(int i2l_argcnt, int& in_args_count,
1.386 + BasicType*& in_sig_bt, VMRegPair*& in_regs);
1.387 +
1.388 + // Generate I2C and C2I adapters. These adapters are simple argument marshalling
1.389 + // blobs. Unlike adapters in the tiger and earlier releases the code in these
1.390 + // blobs does not create a new frame and are therefore virtually invisible
1.391 + // to the stack walking code. In general these blobs extend the callers stack
1.392 + // as needed for the conversion of argument locations.
1.393 +
1.394 + // When calling a c2i blob the code will always call the interpreter even if
1.395 + // by the time we reach the blob there is compiled code available. This allows
1.396 + // the blob to pass the incoming stack pointer (the sender sp) in a known
1.397 + // location for the interpreter to record. This is used by the frame code
1.398 + // to correct the sender code to match up with the stack pointer when the
1.399 + // thread left the compiled code. In addition it allows the interpreter
1.400 + // to remove the space the c2i adapter allocated to do its argument conversion.
1.401 +
1.402 + // Although a c2i blob will always run interpreted even if compiled code is
1.403 + // present if we see that compiled code is present the compiled call site
1.404 + // will be patched/re-resolved so that later calls will run compiled.
1.405 +
1.406 + // Aditionally a c2i blob need to have a unverified entry because it can be reached
1.407 + // in situations where the call site is an inlined cache site and may go megamorphic.
1.408 +
1.409 + // A i2c adapter is simpler than the c2i adapter. This is because it is assumed
1.410 + // that the interpreter before it does any call dispatch will record the current
1.411 + // stack pointer in the interpreter frame. On return it will restore the stack
1.412 + // pointer as needed. This means the i2c adapter code doesn't need any special
1.413 + // handshaking path with compiled code to keep the stack walking correct.
1.414 +
1.415 + static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *_masm,
1.416 + int total_args_passed,
1.417 + int max_arg,
1.418 + const BasicType *sig_bt,
1.419 + const VMRegPair *regs,
1.420 + AdapterFingerPrint* fingerprint);
1.421 +
1.422 + // OSR support
1.423 +
1.424 + // OSR_migration_begin will extract the jvm state from an interpreter
1.425 + // frame (locals, monitors) and store the data in a piece of C heap
1.426 + // storage. This then allows the interpreter frame to be removed from the
1.427 + // stack and the OSR nmethod to be called. That method is called with a
1.428 + // pointer to the C heap storage. This pointer is the return value from
1.429 + // OSR_migration_begin.
1.430 +
1.431 + static intptr_t* OSR_migration_begin( JavaThread *thread);
1.432 +
1.433 + // OSR_migration_end is a trivial routine. It is called after the compiled
1.434 + // method has extracted the jvm state from the C heap that OSR_migration_begin
1.435 + // created. It's entire job is to simply free this storage.
1.436 + static void OSR_migration_end ( intptr_t* buf);
1.437 +
1.438 + // Convert a sig into a calling convention register layout
1.439 + // and find interesting things about it.
1.440 + static VMRegPair* find_callee_arguments(Symbol* sig, bool has_receiver, bool has_appendix, int *arg_size);
1.441 + static VMReg name_for_receiver();
1.442 +
1.443 + // "Top of Stack" slots that may be unused by the calling convention but must
1.444 + // otherwise be preserved.
1.445 + // On Intel these are not necessary and the value can be zero.
1.446 + // On Sparc this describes the words reserved for storing a register window
1.447 + // when an interrupt occurs.
1.448 + static uint out_preserve_stack_slots();
1.449 +
1.450 + // Is vector's size (in bytes) bigger than a size saved by default?
1.451 + // For example, on x86 16 bytes XMM registers are saved by default.
1.452 + static bool is_wide_vector(int size);
1.453 +
1.454 + // Save and restore a native result
1.455 + static void save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots );
1.456 + static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots );
1.457 +
1.458 + // Generate a native wrapper for a given method. The method takes arguments
1.459 + // in the Java compiled code convention, marshals them to the native
1.460 + // convention (handlizes oops, etc), transitions to native, makes the call,
1.461 + // returns to java state (possibly blocking), unhandlizes any result and
1.462 + // returns.
1.463 + //
1.464 + // The wrapper may contain special-case code if the given method
1.465 + // is a JNI critical method, or a compiled method handle adapter,
1.466 + // such as _invokeBasic, _linkToVirtual, etc.
1.467 + static nmethod* generate_native_wrapper(MacroAssembler* masm,
1.468 + methodHandle method,
1.469 + int compile_id,
1.470 + BasicType* sig_bt,
1.471 + VMRegPair* regs,
1.472 + BasicType ret_type );
1.473 +
1.474 + // Block before entering a JNI critical method
1.475 + static void block_for_jni_critical(JavaThread* thread);
1.476 +
1.477 +#ifdef HAVE_DTRACE_H
1.478 + // Generate a dtrace wrapper for a given method. The method takes arguments
1.479 + // in the Java compiled code convention, marshals them to the native
1.480 + // convention (handlizes oops, etc), transitions to native, makes the call,
1.481 + // returns to java state (possibly blocking), unhandlizes any result and
1.482 + // returns.
1.483 + static nmethod *generate_dtrace_nmethod(MacroAssembler* masm,
1.484 + methodHandle method);
1.485 +
1.486 + // dtrace support to convert a Java string to utf8
1.487 + static void get_utf(oopDesc* src, address dst);
1.488 +#endif // def HAVE_DTRACE_H
1.489 +
1.490 + // A compiled caller has just called the interpreter, but compiled code
1.491 + // exists. Patch the caller so he no longer calls into the interpreter.
1.492 + static void fixup_callers_callsite(Method* moop, address ret_pc);
1.493 +
1.494 + // Slow-path Locking and Unlocking
1.495 + static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* thread);
1.496 + static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock);
1.497 +
1.498 + // Resolving of calls
1.499 + static address resolve_static_call_C (JavaThread *thread);
1.500 + static address resolve_virtual_call_C (JavaThread *thread);
1.501 + static address resolve_opt_virtual_call_C(JavaThread *thread);
1.502 +
1.503 + // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.)
1.504 + static void slow_arraycopy_C(oopDesc* src, jint src_pos,
1.505 + oopDesc* dest, jint dest_pos,
1.506 + jint length, JavaThread* thread);
1.507 +
1.508 + // handle ic miss with caller being compiled code
1.509 + // wrong method handling (inline cache misses, zombie methods)
1.510 + static address handle_wrong_method(JavaThread* thread);
1.511 + static address handle_wrong_method_abstract(JavaThread* thread);
1.512 + static address handle_wrong_method_ic_miss(JavaThread* thread);
1.513 +
1.514 +#ifndef PRODUCT
1.515 +
1.516 + // Collect and print inline cache miss statistics
1.517 + private:
1.518 + enum { maxICmiss_count = 100 };
1.519 + static int _ICmiss_index; // length of IC miss histogram
1.520 + static int _ICmiss_count[maxICmiss_count]; // miss counts
1.521 + static address _ICmiss_at[maxICmiss_count]; // miss addresses
1.522 + static void trace_ic_miss(address at);
1.523 +
1.524 + public:
1.525 + static int _monitor_enter_ctr; // monitor enter slow
1.526 + static int _monitor_exit_ctr; // monitor exit slow
1.527 + static int _throw_null_ctr; // throwing a null-pointer exception
1.528 + static int _ic_miss_ctr; // total # of IC misses
1.529 + static int _wrong_method_ctr;
1.530 + static int _resolve_static_ctr;
1.531 + static int _resolve_virtual_ctr;
1.532 + static int _resolve_opt_virtual_ctr;
1.533 + static int _implicit_null_throws;
1.534 + static int _implicit_div0_throws;
1.535 +
1.536 + static int _jbyte_array_copy_ctr; // Slow-path byte array copy
1.537 + static int _jshort_array_copy_ctr; // Slow-path short array copy
1.538 + static int _jint_array_copy_ctr; // Slow-path int array copy
1.539 + static int _jlong_array_copy_ctr; // Slow-path long array copy
1.540 + static int _oop_array_copy_ctr; // Slow-path oop array copy
1.541 + static int _checkcast_array_copy_ctr; // Slow-path oop array copy, with cast
1.542 + static int _unsafe_array_copy_ctr; // Slow-path includes alignment checks
1.543 + static int _generic_array_copy_ctr; // Slow-path includes type decoding
1.544 + static int _slow_array_copy_ctr; // Slow-path failed out to a method call
1.545 +
1.546 + static int _new_instance_ctr; // 'new' object requires GC
1.547 + static int _new_array_ctr; // 'new' array requires GC
1.548 + static int _multi1_ctr, _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr;
1.549 + static int _find_handler_ctr; // find exception handler
1.550 + static int _rethrow_ctr; // rethrow exception
1.551 + static int _mon_enter_stub_ctr; // monitor enter stub
1.552 + static int _mon_exit_stub_ctr; // monitor exit stub
1.553 + static int _mon_enter_ctr; // monitor enter slow
1.554 + static int _mon_exit_ctr; // monitor exit slow
1.555 + static int _partial_subtype_ctr; // SubRoutines::partial_subtype_check
1.556 +
1.557 + // Statistics code
1.558 + // stats for "normal" compiled calls (non-interface)
1.559 + static int _nof_normal_calls; // total # of calls
1.560 + static int _nof_optimized_calls; // total # of statically-bound calls
1.561 + static int _nof_inlined_calls; // total # of inlined normal calls
1.562 + static int _nof_static_calls; // total # of calls to static methods or super methods (invokespecial)
1.563 + static int _nof_inlined_static_calls; // total # of inlined static calls
1.564 + // stats for compiled interface calls
1.565 + static int _nof_interface_calls; // total # of compiled calls
1.566 + static int _nof_optimized_interface_calls; // total # of statically-bound interface calls
1.567 + static int _nof_inlined_interface_calls; // total # of inlined interface calls
1.568 + static int _nof_megamorphic_interface_calls;// total # of megamorphic interface calls
1.569 + // stats for runtime exceptions
1.570 + static int _nof_removable_exceptions; // total # of exceptions that could be replaced by branches due to inlining
1.571 +
1.572 + public: // for compiler
1.573 + static address nof_normal_calls_addr() { return (address)&_nof_normal_calls; }
1.574 + static address nof_optimized_calls_addr() { return (address)&_nof_optimized_calls; }
1.575 + static address nof_inlined_calls_addr() { return (address)&_nof_inlined_calls; }
1.576 + static address nof_static_calls_addr() { return (address)&_nof_static_calls; }
1.577 + static address nof_inlined_static_calls_addr() { return (address)&_nof_inlined_static_calls; }
1.578 + static address nof_interface_calls_addr() { return (address)&_nof_interface_calls; }
1.579 + static address nof_optimized_interface_calls_addr() { return (address)&_nof_optimized_interface_calls; }
1.580 + static address nof_inlined_interface_calls_addr() { return (address)&_nof_inlined_interface_calls; }
1.581 + static address nof_megamorphic_interface_calls_addr() { return (address)&_nof_megamorphic_interface_calls; }
1.582 + static void print_call_statistics(int comp_total);
1.583 + static void print_statistics();
1.584 + static void print_ic_miss_histogram();
1.585 +
1.586 +#endif // PRODUCT
1.587 +};
1.588 +
1.589 +
1.590 +// ---------------------------------------------------------------------------
1.591 +// Implementation of AdapterHandlerLibrary
1.592 +//
1.593 +// This library manages argument marshaling adapters and native wrappers.
1.594 +// There are 2 flavors of adapters: I2C and C2I.
1.595 +//
1.596 +// The I2C flavor takes a stock interpreted call setup, marshals the
1.597 +// arguments for a Java-compiled call, and jumps to Rmethod-> code()->
1.598 +// code_begin(). It is broken to call it without an nmethod assigned.
1.599 +// The usual behavior is to lift any register arguments up out of the
1.600 +// stack and possibly re-pack the extra arguments to be contigious.
1.601 +// I2C adapters will save what the interpreter's stack pointer will be
1.602 +// after arguments are popped, then adjust the interpreter's frame
1.603 +// size to force alignment and possibly to repack the arguments.
1.604 +// After re-packing, it jumps to the compiled code start. There are
1.605 +// no safepoints in this adapter code and a GC cannot happen while
1.606 +// marshaling is in progress.
1.607 +//
1.608 +// The C2I flavor takes a stock compiled call setup plus the target method in
1.609 +// Rmethod, marshals the arguments for an interpreted call and jumps to
1.610 +// Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been
1.611 +// setup. Compiled frames are fixed-size and the args are likely not in the
1.612 +// right place. Hence all the args will likely be copied into the
1.613 +// interpreter's frame, forcing that frame to grow. The compiled frame's
1.614 +// outgoing stack args will be dead after the copy.
1.615 +//
1.616 +// Native wrappers, like adapters, marshal arguments. Unlike adapters they
1.617 +// also perform an offical frame push & pop. They have a call to the native
1.618 +// routine in their middles and end in a return (instead of ending in a jump).
1.619 +// The native wrappers are stored in real nmethods instead of the BufferBlobs
1.620 +// used by the adapters. The code generation happens here because it's very
1.621 +// similar to what the adapters have to do.
1.622 +
1.623 +class AdapterHandlerEntry : public BasicHashtableEntry<mtCode> {
1.624 + friend class AdapterHandlerTable;
1.625 +
1.626 + private:
1.627 + AdapterFingerPrint* _fingerprint;
1.628 + address _i2c_entry;
1.629 + address _c2i_entry;
1.630 + address _c2i_unverified_entry;
1.631 +
1.632 +#ifdef ASSERT
1.633 + // Captures code and signature used to generate this adapter when
1.634 + // verifing adapter equivalence.
1.635 + unsigned char* _saved_code;
1.636 + int _saved_code_length;
1.637 +#endif
1.638 +
1.639 + void init(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_unverified_entry) {
1.640 + _fingerprint = fingerprint;
1.641 + _i2c_entry = i2c_entry;
1.642 + _c2i_entry = c2i_entry;
1.643 + _c2i_unverified_entry = c2i_unverified_entry;
1.644 +#ifdef ASSERT
1.645 + _saved_code = NULL;
1.646 + _saved_code_length = 0;
1.647 +#endif
1.648 + }
1.649 +
1.650 + void deallocate();
1.651 +
1.652 + // should never be used
1.653 + AdapterHandlerEntry();
1.654 +
1.655 + public:
1.656 + address get_i2c_entry() const { return _i2c_entry; }
1.657 + address get_c2i_entry() const { return _c2i_entry; }
1.658 + address get_c2i_unverified_entry() const { return _c2i_unverified_entry; }
1.659 + address base_address();
1.660 + void relocate(address new_base);
1.661 +
1.662 + AdapterFingerPrint* fingerprint() const { return _fingerprint; }
1.663 +
1.664 + AdapterHandlerEntry* next() {
1.665 + return (AdapterHandlerEntry*)BasicHashtableEntry<mtCode>::next();
1.666 + }
1.667 +
1.668 +#ifdef ASSERT
1.669 + // Used to verify that code generated for shared adapters is equivalent
1.670 + void save_code (unsigned char* code, int length);
1.671 + bool compare_code(unsigned char* code, int length);
1.672 +#endif
1.673 +
1.674 + //virtual void print_on(outputStream* st) const; DO NOT USE
1.675 + void print_adapter_on(outputStream* st) const;
1.676 +};
1.677 +
1.678 +class AdapterHandlerLibrary: public AllStatic {
1.679 + private:
1.680 + static BufferBlob* _buffer; // the temporary code buffer in CodeCache
1.681 + static AdapterHandlerTable* _adapters;
1.682 + static AdapterHandlerEntry* _abstract_method_handler;
1.683 + static BufferBlob* buffer_blob();
1.684 + static void initialize();
1.685 +
1.686 + public:
1.687 +
1.688 + static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint,
1.689 + address i2c_entry, address c2i_entry, address c2i_unverified_entry);
1.690 + static void create_native_wrapper(methodHandle method);
1.691 + static AdapterHandlerEntry* get_adapter(methodHandle method);
1.692 +
1.693 +#ifdef HAVE_DTRACE_H
1.694 + static nmethod* create_dtrace_nmethod (methodHandle method);
1.695 +#endif // HAVE_DTRACE_H
1.696 +
1.697 + static void print_handler(CodeBlob* b) { print_handler_on(tty, b); }
1.698 + static void print_handler_on(outputStream* st, CodeBlob* b);
1.699 + static bool contains(CodeBlob* b);
1.700 +#ifndef PRODUCT
1.701 + static void print_statistics();
1.702 +#endif /* PRODUCT */
1.703 +
1.704 +};
1.705 +
1.706 +#endif // SHARE_VM_RUNTIME_SHAREDRUNTIME_HPP
