Wed, 15 Feb 2012 16:29:40 -0800
7142680: default GC affected by jvm path
Summary: Removed old tiered code
Reviewed-by: never, kvn
1 /*
2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #ifndef SHARE_VM_RUNTIME_SHAREDRUNTIME_HPP
26 #define SHARE_VM_RUNTIME_SHAREDRUNTIME_HPP
28 #include "interpreter/bytecodeHistogram.hpp"
29 #include "interpreter/bytecodeTracer.hpp"
30 #include "interpreter/linkResolver.hpp"
31 #include "memory/allocation.hpp"
32 #include "memory/resourceArea.hpp"
33 #include "runtime/threadLocalStorage.hpp"
34 #include "utilities/hashtable.hpp"
36 class AdapterHandlerEntry;
37 class AdapterHandlerTable;
38 class AdapterFingerPrint;
39 class vframeStream;
41 // Runtime is the base class for various runtime interfaces
42 // (InterpreterRuntime, CompilerRuntime, etc.). It provides
43 // shared functionality such as exception forwarding (C++ to
44 // Java exceptions), locking/unlocking mechanisms, statistical
45 // information, etc.
47 class SharedRuntime: AllStatic {
48 friend class VMStructs;
50 private:
51 static methodHandle resolve_sub_helper(JavaThread *thread,
52 bool is_virtual,
53 bool is_optimized, TRAPS);
55 // Shared stub locations
57 static RuntimeStub* _wrong_method_blob;
58 static RuntimeStub* _ic_miss_blob;
59 static RuntimeStub* _resolve_opt_virtual_call_blob;
60 static RuntimeStub* _resolve_virtual_call_blob;
61 static RuntimeStub* _resolve_static_call_blob;
63 static DeoptimizationBlob* _deopt_blob;
64 static RicochetBlob* _ricochet_blob;
66 static SafepointBlob* _polling_page_safepoint_handler_blob;
67 static SafepointBlob* _polling_page_return_handler_blob;
69 #ifdef COMPILER2
70 static UncommonTrapBlob* _uncommon_trap_blob;
71 #endif // COMPILER2
73 #ifndef PRODUCT
74 // Counters
75 static int _nof_megamorphic_calls; // total # of megamorphic calls (through vtable)
76 #endif // !PRODUCT
78 private:
79 static SafepointBlob* generate_handler_blob(address call_ptr, bool cause_return);
80 static RuntimeStub* generate_resolve_blob(address destination, const char* name);
82 public:
83 static void generate_stubs(void);
85 // max bytes for each dtrace string parameter
86 enum { max_dtrace_string_size = 256 };
88 // The following arithmetic routines are used on platforms that do
89 // not have machine instructions to implement their functionality.
90 // Do not remove these.
92 // long arithmetics
93 static jlong lmul(jlong y, jlong x);
94 static jlong ldiv(jlong y, jlong x);
95 static jlong lrem(jlong y, jlong x);
97 // float and double remainder
98 static jfloat frem(jfloat x, jfloat y);
99 static jdouble drem(jdouble x, jdouble y);
101 #ifdef __SOFTFP__
102 static jfloat fadd(jfloat x, jfloat y);
103 static jfloat fsub(jfloat x, jfloat y);
104 static jfloat fmul(jfloat x, jfloat y);
105 static jfloat fdiv(jfloat x, jfloat y);
107 static jdouble dadd(jdouble x, jdouble y);
108 static jdouble dsub(jdouble x, jdouble y);
109 static jdouble dmul(jdouble x, jdouble y);
110 static jdouble ddiv(jdouble x, jdouble y);
111 #endif // __SOFTFP__
113 // float conversion (needs to set appropriate rounding mode)
114 static jint f2i (jfloat x);
115 static jlong f2l (jfloat x);
116 static jint d2i (jdouble x);
117 static jlong d2l (jdouble x);
118 static jfloat d2f (jdouble x);
119 static jfloat l2f (jlong x);
120 static jdouble l2d (jlong x);
122 #ifdef __SOFTFP__
123 static jfloat i2f (jint x);
124 static jdouble i2d (jint x);
125 static jdouble f2d (jfloat x);
126 #endif // __SOFTFP__
128 // double trigonometrics and transcendentals
129 static jdouble dsin(jdouble x);
130 static jdouble dcos(jdouble x);
131 static jdouble dtan(jdouble x);
132 static jdouble dlog(jdouble x);
133 static jdouble dlog10(jdouble x);
134 static jdouble dexp(jdouble x);
135 static jdouble dpow(jdouble x, jdouble y);
137 #if defined(__SOFTFP__) || defined(E500V2)
138 static double dabs(double f);
139 #endif
141 #if defined(__SOFTFP__) || defined(PPC)
142 static double dsqrt(double f);
143 #endif
145 #ifdef __SOFTFP__
146 // C++ compiler generates soft float instructions as well as passing
147 // float and double in registers.
148 static int fcmpl(float x, float y);
149 static int fcmpg(float x, float y);
150 static int dcmpl(double x, double y);
151 static int dcmpg(double x, double y);
153 static int unordered_fcmplt(float x, float y);
154 static int unordered_dcmplt(double x, double y);
155 static int unordered_fcmple(float x, float y);
156 static int unordered_dcmple(double x, double y);
157 static int unordered_fcmpge(float x, float y);
158 static int unordered_dcmpge(double x, double y);
159 static int unordered_fcmpgt(float x, float y);
160 static int unordered_dcmpgt(double x, double y);
162 static float fneg(float f);
163 static double dneg(double f);
164 #endif
166 // exception handling across interpreter/compiler boundaries
167 static address raw_exception_handler_for_return_address(JavaThread* thread, address return_address);
168 static address exception_handler_for_return_address(JavaThread* thread, address return_address);
170 #ifndef SERIALGC
171 // G1 write barriers
172 static void g1_wb_pre(oopDesc* orig, JavaThread *thread);
173 static void g1_wb_post(void* card_addr, JavaThread* thread);
174 #endif // !SERIALGC
176 // exception handling and implicit exceptions
177 static address compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception,
178 bool force_unwind, bool top_frame_only);
179 enum ImplicitExceptionKind {
180 IMPLICIT_NULL,
181 IMPLICIT_DIVIDE_BY_ZERO,
182 STACK_OVERFLOW
183 };
184 static void throw_AbstractMethodError(JavaThread* thread);
185 static void throw_IncompatibleClassChangeError(JavaThread* thread);
186 static void throw_ArithmeticException(JavaThread* thread);
187 static void throw_NullPointerException(JavaThread* thread);
188 static void throw_NullPointerException_at_call(JavaThread* thread);
189 static void throw_StackOverflowError(JavaThread* thread);
190 static void throw_WrongMethodTypeException(JavaThread* thread, oopDesc* required, oopDesc* actual);
191 static address continuation_for_implicit_exception(JavaThread* thread,
192 address faulting_pc,
193 ImplicitExceptionKind exception_kind);
195 // Shared stub locations
196 static address get_poll_stub(address pc);
198 static address get_ic_miss_stub() {
199 assert(_ic_miss_blob!= NULL, "oops");
200 return _ic_miss_blob->entry_point();
201 }
203 static address get_handle_wrong_method_stub() {
204 assert(_wrong_method_blob!= NULL, "oops");
205 return _wrong_method_blob->entry_point();
206 }
208 #ifdef COMPILER2
209 static void generate_uncommon_trap_blob(void);
210 static UncommonTrapBlob* uncommon_trap_blob() { return _uncommon_trap_blob; }
211 #endif // COMPILER2
213 static address get_resolve_opt_virtual_call_stub(){
214 assert(_resolve_opt_virtual_call_blob != NULL, "oops");
215 return _resolve_opt_virtual_call_blob->entry_point();
216 }
217 static address get_resolve_virtual_call_stub() {
218 assert(_resolve_virtual_call_blob != NULL, "oops");
219 return _resolve_virtual_call_blob->entry_point();
220 }
221 static address get_resolve_static_call_stub() {
222 assert(_resolve_static_call_blob != NULL, "oops");
223 return _resolve_static_call_blob->entry_point();
224 }
226 static RicochetBlob* ricochet_blob() {
227 #ifdef X86
228 // Currently only implemented on x86
229 assert(!EnableInvokeDynamic || _ricochet_blob != NULL, "oops");
230 #endif
231 return _ricochet_blob;
232 }
234 static void generate_ricochet_blob();
236 static SafepointBlob* polling_page_return_handler_blob() { return _polling_page_return_handler_blob; }
237 static SafepointBlob* polling_page_safepoint_handler_blob() { return _polling_page_safepoint_handler_blob; }
239 // Counters
240 #ifndef PRODUCT
241 static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; }
242 #endif // PRODUCT
244 // Helper routine for full-speed JVMTI exception throwing support
245 static void throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception);
246 static void throw_and_post_jvmti_exception(JavaThread *thread, Symbol* name, const char *message = NULL);
248 // RedefineClasses() tracing support for obsolete method entry
249 static int rc_trace_method_entry(JavaThread* thread, methodOopDesc* m);
251 // To be used as the entry point for unresolved native methods.
252 static address native_method_throw_unsatisfied_link_error_entry();
254 // bytecode tracing is only used by the TraceBytecodes
255 static intptr_t trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2) PRODUCT_RETURN0;
257 // Used to back off a spin lock that is under heavy contention
258 static void yield_all(JavaThread* thread, int attempts = 0);
260 static oop retrieve_receiver( Symbol* sig, frame caller );
262 static void register_finalizer(JavaThread* thread, oopDesc* obj);
264 // dtrace notifications
265 static int dtrace_object_alloc(oopDesc* o);
266 static int dtrace_object_alloc_base(Thread* thread, oopDesc* o);
267 static int dtrace_method_entry(JavaThread* thread, methodOopDesc* m);
268 static int dtrace_method_exit(JavaThread* thread, methodOopDesc* m);
270 // Utility method for retrieving the Java thread id, returns 0 if the
271 // thread is not a well formed Java thread.
272 static jlong get_java_tid(Thread* thread);
275 // used by native wrappers to reenable yellow if overflow happened in native code
276 static void reguard_yellow_pages();
278 /**
279 * Fill in the "X cannot be cast to a Y" message for ClassCastException
280 *
281 * @param thr the current thread
282 * @param name the name of the class of the object attempted to be cast
283 * @return the dynamically allocated exception message (must be freed
284 * by the caller using a resource mark)
285 *
286 * BCP must refer to the current 'checkcast' opcode for the frame
287 * on top of the stack.
288 * The caller (or one of it's callers) must use a ResourceMark
289 * in order to correctly free the result.
290 */
291 static char* generate_class_cast_message(JavaThread* thr, const char* name);
293 /**
294 * Fill in the message for a WrongMethodTypeException
295 *
296 * @param thr the current thread
297 * @param mtype (optional) expected method type (or argument class)
298 * @param mhandle (optional) actual method handle (or argument)
299 * @return the dynamically allocated exception message
300 *
301 * BCP for the frame on top of the stack must refer to an
302 * 'invokevirtual' op for a method handle, or an 'invokedyamic' op.
303 * The caller (or one of its callers) must use a ResourceMark
304 * in order to correctly free the result.
305 */
306 static char* generate_wrong_method_type_message(JavaThread* thr,
307 oopDesc* mtype = NULL,
308 oopDesc* mhandle = NULL);
310 /** Return non-null if the mtype is a klass or Class, not a MethodType. */
311 static oop wrong_method_type_is_for_single_argument(JavaThread* thr,
312 oopDesc* mtype);
314 /**
315 * Fill in the "X cannot be cast to a Y" message for ClassCastException
316 *
317 * @param name the name of the class of the object attempted to be cast
318 * @param klass the name of the target klass attempt
319 * @param gripe the specific kind of problem being reported
320 * @return the dynamically allocated exception message (must be freed
321 * by the caller using a resource mark)
322 *
323 * This version does not require access the frame, so it can be called
324 * from interpreted code
325 * The caller (or one of it's callers) must use a ResourceMark
326 * in order to correctly free the result.
327 */
328 static char* generate_class_cast_message(const char* name, const char* klass,
329 const char* gripe = " cannot be cast to ");
331 // Resolves a call site- may patch in the destination of the call into the
332 // compiled code.
333 static methodHandle resolve_helper(JavaThread *thread,
334 bool is_virtual,
335 bool is_optimized, TRAPS);
337 private:
338 // deopt blob
339 static void generate_deopt_blob(void);
341 public:
342 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; }
344 // Resets a call-site in compiled code so it will get resolved again.
345 static methodHandle reresolve_call_site(JavaThread *thread, TRAPS);
347 // In the code prolog, if the klass comparison fails, the inline cache
348 // misses and the call site is patched to megamorphic
349 static methodHandle handle_ic_miss_helper(JavaThread* thread, TRAPS);
351 // Find the method that called us.
352 static methodHandle find_callee_method(JavaThread* thread, TRAPS);
355 private:
356 static Handle find_callee_info(JavaThread* thread,
357 Bytecodes::Code& bc,
358 CallInfo& callinfo, TRAPS);
359 static Handle find_callee_info_helper(JavaThread* thread,
360 vframeStream& vfst,
361 Bytecodes::Code& bc,
362 CallInfo& callinfo, TRAPS);
364 static address clean_virtual_call_entry();
365 static address clean_opt_virtual_call_entry();
366 static address clean_static_call_entry();
368 public:
370 // Read the array of BasicTypes from a Java signature, and compute where
371 // compiled Java code would like to put the results. Values in reg_lo and
372 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are
373 // registers, those above refer to 4-byte stack slots. All stack slots are
374 // based off of the window top. SharedInfo::stack0 refers to the first usable
375 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
376 // 4-bytes higher. So for sparc because the register window save area is at
377 // the bottom of the frame the first 16 words will be skipped and SharedInfo::stack0
378 // will be just above it. (
379 // return value is the maximum number of VMReg stack slots the convention will use.
380 static int java_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed, int is_outgoing);
382 // Ditto except for calling C
383 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed);
385 // Generate I2C and C2I adapters. These adapters are simple argument marshalling
386 // blobs. Unlike adapters in the tiger and earlier releases the code in these
387 // blobs does not create a new frame and are therefore virtually invisible
388 // to the stack walking code. In general these blobs extend the callers stack
389 // as needed for the conversion of argument locations.
391 // When calling a c2i blob the code will always call the interpreter even if
392 // by the time we reach the blob there is compiled code available. This allows
393 // the blob to pass the incoming stack pointer (the sender sp) in a known
394 // location for the interpreter to record. This is used by the frame code
395 // to correct the sender code to match up with the stack pointer when the
396 // thread left the compiled code. In addition it allows the interpreter
397 // to remove the space the c2i adapter allocated to do it argument conversion.
399 // Although a c2i blob will always run interpreted even if compiled code is
400 // present if we see that compiled code is present the compiled call site
401 // will be patched/re-resolved so that later calls will run compiled.
403 // Aditionally a c2i blob need to have a unverified entry because it can be reached
404 // in situations where the call site is an inlined cache site and may go megamorphic.
406 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed
407 // that the interpreter before it does any call dispatch will record the current
408 // stack pointer in the interpreter frame. On return it will restore the stack
409 // pointer as needed. This means the i2c adapter code doesn't need any special
410 // handshaking path with compiled code to keep the stack walking correct.
412 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *_masm,
413 int total_args_passed,
414 int max_arg,
415 const BasicType *sig_bt,
416 const VMRegPair *regs,
417 AdapterFingerPrint* fingerprint);
419 // OSR support
421 // OSR_migration_begin will extract the jvm state from an interpreter
422 // frame (locals, monitors) and store the data in a piece of C heap
423 // storage. This then allows the interpreter frame to be removed from the
424 // stack and the OSR nmethod to be called. That method is called with a
425 // pointer to the C heap storage. This pointer is the return value from
426 // OSR_migration_begin.
428 static intptr_t* OSR_migration_begin( JavaThread *thread);
430 // OSR_migration_end is a trivial routine. It is called after the compiled
431 // method has extracted the jvm state from the C heap that OSR_migration_begin
432 // created. It's entire job is to simply free this storage.
433 static void OSR_migration_end ( intptr_t* buf);
435 // Convert a sig into a calling convention register layout
436 // and find interesting things about it.
437 static VMRegPair* find_callee_arguments(Symbol* sig, bool has_receiver, int *arg_size);
438 static VMReg name_for_receiver();
440 // "Top of Stack" slots that may be unused by the calling convention but must
441 // otherwise be preserved.
442 // On Intel these are not necessary and the value can be zero.
443 // On Sparc this describes the words reserved for storing a register window
444 // when an interrupt occurs.
445 static uint out_preserve_stack_slots();
447 // Save and restore a native result
448 static void save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots );
449 static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots );
451 // Generate a native wrapper for a given method. The method takes arguments
452 // in the Java compiled code convention, marshals them to the native
453 // convention (handlizes oops, etc), transitions to native, makes the call,
454 // returns to java state (possibly blocking), unhandlizes any result and
455 // returns.
456 static nmethod *generate_native_wrapper(MacroAssembler* masm,
457 methodHandle method,
458 int compile_id,
459 int total_args_passed,
460 int max_arg,
461 BasicType *sig_bt,
462 VMRegPair *regs,
463 BasicType ret_type );
465 // Block before entering a JNI critical method
466 static void block_for_jni_critical(JavaThread* thread);
468 #ifdef HAVE_DTRACE_H
469 // Generate a dtrace wrapper for a given method. The method takes arguments
470 // in the Java compiled code convention, marshals them to the native
471 // convention (handlizes oops, etc), transitions to native, makes the call,
472 // returns to java state (possibly blocking), unhandlizes any result and
473 // returns.
474 static nmethod *generate_dtrace_nmethod(MacroAssembler* masm,
475 methodHandle method);
477 // dtrace support to convert a Java string to utf8
478 static void get_utf(oopDesc* src, address dst);
479 #endif // def HAVE_DTRACE_H
481 // A compiled caller has just called the interpreter, but compiled code
482 // exists. Patch the caller so he no longer calls into the interpreter.
483 static void fixup_callers_callsite(methodOopDesc* moop, address ret_pc);
485 // Slow-path Locking and Unlocking
486 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* thread);
487 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock);
489 // Resolving of calls
490 static address resolve_static_call_C (JavaThread *thread);
491 static address resolve_virtual_call_C (JavaThread *thread);
492 static address resolve_opt_virtual_call_C(JavaThread *thread);
494 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.)
495 static void slow_arraycopy_C(oopDesc* src, jint src_pos,
496 oopDesc* dest, jint dest_pos,
497 jint length, JavaThread* thread);
499 // handle ic miss with caller being compiled code
500 // wrong method handling (inline cache misses, zombie methods)
501 static address handle_wrong_method(JavaThread* thread);
502 static address handle_wrong_method_ic_miss(JavaThread* thread);
504 #ifndef PRODUCT
506 // Collect and print inline cache miss statistics
507 private:
508 enum { maxICmiss_count = 100 };
509 static int _ICmiss_index; // length of IC miss histogram
510 static int _ICmiss_count[maxICmiss_count]; // miss counts
511 static address _ICmiss_at[maxICmiss_count]; // miss addresses
512 static void trace_ic_miss(address at);
514 public:
515 static int _monitor_enter_ctr; // monitor enter slow
516 static int _monitor_exit_ctr; // monitor exit slow
517 static int _throw_null_ctr; // throwing a null-pointer exception
518 static int _ic_miss_ctr; // total # of IC misses
519 static int _wrong_method_ctr;
520 static int _resolve_static_ctr;
521 static int _resolve_virtual_ctr;
522 static int _resolve_opt_virtual_ctr;
523 static int _implicit_null_throws;
524 static int _implicit_div0_throws;
526 static int _jbyte_array_copy_ctr; // Slow-path byte array copy
527 static int _jshort_array_copy_ctr; // Slow-path short array copy
528 static int _jint_array_copy_ctr; // Slow-path int array copy
529 static int _jlong_array_copy_ctr; // Slow-path long array copy
530 static int _oop_array_copy_ctr; // Slow-path oop array copy
531 static int _checkcast_array_copy_ctr; // Slow-path oop array copy, with cast
532 static int _unsafe_array_copy_ctr; // Slow-path includes alignment checks
533 static int _generic_array_copy_ctr; // Slow-path includes type decoding
534 static int _slow_array_copy_ctr; // Slow-path failed out to a method call
536 static int _new_instance_ctr; // 'new' object requires GC
537 static int _new_array_ctr; // 'new' array requires GC
538 static int _multi1_ctr, _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr;
539 static int _find_handler_ctr; // find exception handler
540 static int _rethrow_ctr; // rethrow exception
541 static int _mon_enter_stub_ctr; // monitor enter stub
542 static int _mon_exit_stub_ctr; // monitor exit stub
543 static int _mon_enter_ctr; // monitor enter slow
544 static int _mon_exit_ctr; // monitor exit slow
545 static int _partial_subtype_ctr; // SubRoutines::partial_subtype_check
547 // Statistics code
548 // stats for "normal" compiled calls (non-interface)
549 static int _nof_normal_calls; // total # of calls
550 static int _nof_optimized_calls; // total # of statically-bound calls
551 static int _nof_inlined_calls; // total # of inlined normal calls
552 static int _nof_static_calls; // total # of calls to static methods or super methods (invokespecial)
553 static int _nof_inlined_static_calls; // total # of inlined static calls
554 // stats for compiled interface calls
555 static int _nof_interface_calls; // total # of compiled calls
556 static int _nof_optimized_interface_calls; // total # of statically-bound interface calls
557 static int _nof_inlined_interface_calls; // total # of inlined interface calls
558 static int _nof_megamorphic_interface_calls;// total # of megamorphic interface calls
559 // stats for runtime exceptions
560 static int _nof_removable_exceptions; // total # of exceptions that could be replaced by branches due to inlining
562 public: // for compiler
563 static address nof_normal_calls_addr() { return (address)&_nof_normal_calls; }
564 static address nof_optimized_calls_addr() { return (address)&_nof_optimized_calls; }
565 static address nof_inlined_calls_addr() { return (address)&_nof_inlined_calls; }
566 static address nof_static_calls_addr() { return (address)&_nof_static_calls; }
567 static address nof_inlined_static_calls_addr() { return (address)&_nof_inlined_static_calls; }
568 static address nof_interface_calls_addr() { return (address)&_nof_interface_calls; }
569 static address nof_optimized_interface_calls_addr() { return (address)&_nof_optimized_interface_calls; }
570 static address nof_inlined_interface_calls_addr() { return (address)&_nof_inlined_interface_calls; }
571 static address nof_megamorphic_interface_calls_addr() { return (address)&_nof_megamorphic_interface_calls; }
572 static void print_call_statistics(int comp_total);
573 static void print_statistics();
574 static void print_ic_miss_histogram();
576 #endif // PRODUCT
577 };
580 // ---------------------------------------------------------------------------
581 // Implementation of AdapterHandlerLibrary
582 //
583 // This library manages argument marshaling adapters and native wrappers.
584 // There are 2 flavors of adapters: I2C and C2I.
585 //
586 // The I2C flavor takes a stock interpreted call setup, marshals the
587 // arguments for a Java-compiled call, and jumps to Rmethod-> code()->
588 // code_begin(). It is broken to call it without an nmethod assigned.
589 // The usual behavior is to lift any register arguments up out of the
590 // stack and possibly re-pack the extra arguments to be contigious.
591 // I2C adapters will save what the interpreter's stack pointer will be
592 // after arguments are popped, then adjust the interpreter's frame
593 // size to force alignment and possibly to repack the arguments.
594 // After re-packing, it jumps to the compiled code start. There are
595 // no safepoints in this adapter code and a GC cannot happen while
596 // marshaling is in progress.
597 //
598 // The C2I flavor takes a stock compiled call setup plus the target method in
599 // Rmethod, marshals the arguments for an interpreted call and jumps to
600 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been
601 // setup. Compiled frames are fixed-size and the args are likely not in the
602 // right place. Hence all the args will likely be copied into the
603 // interpreter's frame, forcing that frame to grow. The compiled frame's
604 // outgoing stack args will be dead after the copy.
605 //
606 // Native wrappers, like adapters, marshal arguments. Unlike adapters they
607 // also perform an offical frame push & pop. They have a call to the native
608 // routine in their middles and end in a return (instead of ending in a jump).
609 // The native wrappers are stored in real nmethods instead of the BufferBlobs
610 // used by the adapters. The code generation happens here because it's very
611 // similar to what the adapters have to do.
613 class AdapterHandlerEntry : public BasicHashtableEntry {
614 friend class AdapterHandlerTable;
616 private:
617 AdapterFingerPrint* _fingerprint;
618 address _i2c_entry;
619 address _c2i_entry;
620 address _c2i_unverified_entry;
622 #ifdef ASSERT
623 // Captures code and signature used to generate this adapter when
624 // verifing adapter equivalence.
625 unsigned char* _saved_code;
626 int _code_length;
627 BasicType* _saved_sig;
628 int _total_args_passed;
629 #endif
631 void init(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_unverified_entry) {
632 _fingerprint = fingerprint;
633 _i2c_entry = i2c_entry;
634 _c2i_entry = c2i_entry;
635 _c2i_unverified_entry = c2i_unverified_entry;
636 #ifdef ASSERT
637 _saved_code = NULL;
638 _code_length = 0;
639 _saved_sig = NULL;
640 _total_args_passed = 0;
641 #endif
642 }
644 void deallocate();
646 // should never be used
647 AdapterHandlerEntry();
649 public:
650 address get_i2c_entry() { return _i2c_entry; }
651 address get_c2i_entry() { return _c2i_entry; }
652 address get_c2i_unverified_entry() { return _c2i_unverified_entry; }
654 void relocate(address new_base);
656 AdapterFingerPrint* fingerprint() { return _fingerprint; }
658 AdapterHandlerEntry* next() {
659 return (AdapterHandlerEntry*)BasicHashtableEntry::next();
660 }
662 #ifdef ASSERT
663 // Used to verify that code generated for shared adapters is equivalent
664 void save_code(unsigned char* code, int length, int total_args_passed, BasicType* sig_bt);
665 bool compare_code(unsigned char* code, int length, int total_args_passed, BasicType* sig_bt);
666 #endif
668 void print();
669 };
671 class AdapterHandlerLibrary: public AllStatic {
672 private:
673 static BufferBlob* _buffer; // the temporary code buffer in CodeCache
674 static AdapterHandlerTable* _adapters;
675 static AdapterHandlerEntry* _abstract_method_handler;
676 static BufferBlob* buffer_blob();
677 static void initialize();
679 public:
681 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint,
682 address i2c_entry, address c2i_entry, address c2i_unverified_entry);
683 static nmethod* create_native_wrapper(methodHandle method, int compile_id);
684 static AdapterHandlerEntry* get_adapter(methodHandle method);
686 #ifdef HAVE_DTRACE_H
687 static nmethod* create_dtrace_nmethod (methodHandle method);
688 #endif // HAVE_DTRACE_H
690 static void print_handler(CodeBlob* b) { print_handler_on(tty, b); }
691 static void print_handler_on(outputStream* st, CodeBlob* b);
692 static bool contains(CodeBlob* b);
693 #ifndef PRODUCT
694 static void print_statistics();
695 #endif /* PRODUCT */
697 };
699 #endif // SHARE_VM_RUNTIME_SHAREDRUNTIME_HPP