Thu, 24 May 2018 20:03:11 +0800
Increase MaxHeapSize for better performance on MIPS
1 /*
2 * Copyright (c) 1997, 2013, 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 /*
26 * This file has been modified by Loongson Technology in 2015. These
27 * modifications are Copyright (c) 2015 Loongson Technology, and are made
28 * available on the same license terms set forth above.
29 */
31 #ifndef SHARE_VM_RUNTIME_SHAREDRUNTIME_HPP
32 #define SHARE_VM_RUNTIME_SHAREDRUNTIME_HPP
34 #include "interpreter/bytecodeHistogram.hpp"
35 #include "interpreter/bytecodeTracer.hpp"
36 #include "interpreter/linkResolver.hpp"
37 #include "memory/allocation.hpp"
38 #include "memory/resourceArea.hpp"
39 #include "runtime/threadLocalStorage.hpp"
40 #include "utilities/hashtable.hpp"
41 #include "utilities/macros.hpp"
43 class AdapterHandlerEntry;
44 class AdapterHandlerTable;
45 class AdapterFingerPrint;
46 class vframeStream;
48 // Runtime is the base class for various runtime interfaces
49 // (InterpreterRuntime, CompilerRuntime, etc.). It provides
50 // shared functionality such as exception forwarding (C++ to
51 // Java exceptions), locking/unlocking mechanisms, statistical
52 // information, etc.
54 class SharedRuntime: AllStatic {
55 friend class VMStructs;
57 private:
58 static methodHandle resolve_sub_helper(JavaThread *thread,
59 bool is_virtual,
60 bool is_optimized, TRAPS);
62 // Shared stub locations
64 static RuntimeStub* _wrong_method_blob;
65 static RuntimeStub* _wrong_method_abstract_blob;
66 static RuntimeStub* _ic_miss_blob;
67 static RuntimeStub* _resolve_opt_virtual_call_blob;
68 static RuntimeStub* _resolve_virtual_call_blob;
69 static RuntimeStub* _resolve_static_call_blob;
71 static DeoptimizationBlob* _deopt_blob;
73 static SafepointBlob* _polling_page_vectors_safepoint_handler_blob;
74 static SafepointBlob* _polling_page_safepoint_handler_blob;
75 static SafepointBlob* _polling_page_return_handler_blob;
77 #ifdef COMPILER2
78 static UncommonTrapBlob* _uncommon_trap_blob;
79 #endif // COMPILER2
81 #ifndef PRODUCT
82 // Counters
83 static int _nof_megamorphic_calls; // total # of megamorphic calls (through vtable)
84 #endif // !PRODUCT
86 private:
87 enum { POLL_AT_RETURN, POLL_AT_LOOP, POLL_AT_VECTOR_LOOP };
88 static SafepointBlob* generate_handler_blob(address call_ptr, int poll_type);
89 static RuntimeStub* generate_resolve_blob(address destination, const char* name);
91 public:
92 static void generate_stubs(void);
94 // max bytes for each dtrace string parameter
95 enum { max_dtrace_string_size = 256 };
97 // The following arithmetic routines are used on platforms that do
98 // not have machine instructions to implement their functionality.
99 // Do not remove these.
101 // long arithmetics
102 static jlong lmul(jlong y, jlong x);
103 static jlong ldiv(jlong y, jlong x);
104 static jlong lrem(jlong y, jlong x);
106 // float and double remainder
107 static jfloat frem(jfloat x, jfloat y);
108 static jdouble drem(jdouble x, jdouble y);
110 #ifdef __SOFTFP__
111 static jfloat fadd(jfloat x, jfloat y);
112 static jfloat fsub(jfloat x, jfloat y);
113 static jfloat fmul(jfloat x, jfloat y);
114 static jfloat fdiv(jfloat x, jfloat y);
116 static jdouble dadd(jdouble x, jdouble y);
117 static jdouble dsub(jdouble x, jdouble y);
118 static jdouble dmul(jdouble x, jdouble y);
119 static jdouble ddiv(jdouble x, jdouble y);
120 #endif // __SOFTFP__
122 // float conversion (needs to set appropriate rounding mode)
123 static jint f2i (jfloat x);
124 static jlong f2l (jfloat x);
125 static jint d2i (jdouble x);
126 static jlong d2l (jdouble x);
127 static jfloat d2f (jdouble x);
128 static jfloat l2f (jlong x);
129 static jdouble l2d (jlong x);
131 #ifdef __SOFTFP__
132 static jfloat i2f (jint x);
133 static jdouble i2d (jint x);
134 static jdouble f2d (jfloat x);
135 #endif // __SOFTFP__
137 // double trigonometrics and transcendentals
138 static jdouble dsin(jdouble x);
139 static jdouble dcos(jdouble x);
140 static jdouble dtan(jdouble x);
141 static jdouble dlog(jdouble x);
142 static jdouble dlog10(jdouble x);
143 static jdouble dexp(jdouble x);
144 static jdouble dpow(jdouble x, jdouble y);
146 #if defined(__SOFTFP__) || defined(E500V2)
147 static double dabs(double f);
148 #endif
150 #if defined(__SOFTFP__) || defined(PPC32)
151 static double dsqrt(double f);
152 #endif
154 // Montgomery multiplication
155 static void montgomery_multiply(jint *a_ints, jint *b_ints, jint *n_ints,
156 jint len, jlong inv, jint *m_ints);
157 static void montgomery_square(jint *a_ints, jint *n_ints,
158 jint len, jlong inv, jint *m_ints);
160 #ifdef __SOFTFP__
161 // C++ compiler generates soft float instructions as well as passing
162 // float and double in registers.
163 static int fcmpl(float x, float y);
164 static int fcmpg(float x, float y);
165 static int dcmpl(double x, double y);
166 static int dcmpg(double x, double y);
168 static int unordered_fcmplt(float x, float y);
169 static int unordered_dcmplt(double x, double y);
170 static int unordered_fcmple(float x, float y);
171 static int unordered_dcmple(double x, double y);
172 static int unordered_fcmpge(float x, float y);
173 static int unordered_dcmpge(double x, double y);
174 static int unordered_fcmpgt(float x, float y);
175 static int unordered_dcmpgt(double x, double y);
177 static float fneg(float f);
178 static double dneg(double f);
179 #endif
181 // exception handling across interpreter/compiler boundaries
182 static address raw_exception_handler_for_return_address(JavaThread* thread, address return_address);
183 static address exception_handler_for_return_address(JavaThread* thread, address return_address);
185 #if INCLUDE_ALL_GCS
186 // G1 write barriers
187 static void g1_wb_pre(oopDesc* orig, JavaThread *thread);
188 static void g1_wb_post(void* card_addr, JavaThread* thread);
189 #endif // INCLUDE_ALL_GCS
191 // exception handling and implicit exceptions
192 static address compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception,
193 bool force_unwind, bool top_frame_only);
194 enum ImplicitExceptionKind {
195 IMPLICIT_NULL,
196 IMPLICIT_DIVIDE_BY_ZERO,
197 STACK_OVERFLOW
198 };
199 static void throw_AbstractMethodError(JavaThread* thread);
200 static void throw_IncompatibleClassChangeError(JavaThread* thread);
201 static void throw_ArithmeticException(JavaThread* thread);
202 static void throw_NullPointerException(JavaThread* thread);
203 static void throw_NullPointerException_at_call(JavaThread* thread);
204 static void throw_StackOverflowError(JavaThread* thread);
205 static address continuation_for_implicit_exception(JavaThread* thread,
206 address faulting_pc,
207 ImplicitExceptionKind exception_kind);
209 // Shared stub locations
210 static address get_poll_stub(address pc);
212 static address get_ic_miss_stub() {
213 assert(_ic_miss_blob!= NULL, "oops");
214 return _ic_miss_blob->entry_point();
215 }
217 static address get_handle_wrong_method_stub() {
218 assert(_wrong_method_blob!= NULL, "oops");
219 return _wrong_method_blob->entry_point();
220 }
222 static address get_handle_wrong_method_abstract_stub() {
223 assert(_wrong_method_abstract_blob!= NULL, "oops");
224 return _wrong_method_abstract_blob->entry_point();
225 }
227 #ifdef COMPILER2
228 static void generate_uncommon_trap_blob(void);
229 static UncommonTrapBlob* uncommon_trap_blob() { return _uncommon_trap_blob; }
230 #endif // COMPILER2
232 static address get_resolve_opt_virtual_call_stub(){
233 assert(_resolve_opt_virtual_call_blob != NULL, "oops");
234 return _resolve_opt_virtual_call_blob->entry_point();
235 }
236 static address get_resolve_virtual_call_stub() {
237 assert(_resolve_virtual_call_blob != NULL, "oops");
238 return _resolve_virtual_call_blob->entry_point();
239 }
240 static address get_resolve_static_call_stub() {
241 assert(_resolve_static_call_blob != NULL, "oops");
242 return _resolve_static_call_blob->entry_point();
243 }
245 static SafepointBlob* polling_page_return_handler_blob() { return _polling_page_return_handler_blob; }
246 static SafepointBlob* polling_page_safepoint_handler_blob() { return _polling_page_safepoint_handler_blob; }
247 static SafepointBlob* polling_page_vectors_safepoint_handler_blob() { return _polling_page_vectors_safepoint_handler_blob; }
249 // Counters
250 #ifndef PRODUCT
251 static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; }
252 #endif // PRODUCT
254 // Helper routine for full-speed JVMTI exception throwing support
255 static void throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception);
256 static void throw_and_post_jvmti_exception(JavaThread *thread, Symbol* name, const char *message = NULL);
258 // RedefineClasses() tracing support for obsolete method entry
259 static int rc_trace_method_entry(JavaThread* thread, Method* m);
261 // To be used as the entry point for unresolved native methods.
262 static address native_method_throw_unsatisfied_link_error_entry();
263 static address native_method_throw_unsupported_operation_exception_entry();
265 // bytecode tracing is only used by the TraceBytecodes
266 static intptr_t trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2) PRODUCT_RETURN0;
268 // Used to back off a spin lock that is under heavy contention
269 static void yield_all(JavaThread* thread, int attempts = 0);
271 static oop retrieve_receiver( Symbol* sig, frame caller );
273 static void register_finalizer(JavaThread* thread, oopDesc* obj);
275 // dtrace notifications
276 static int dtrace_object_alloc(oopDesc* o, int size);
277 static int dtrace_object_alloc_base(Thread* thread, oopDesc* o, int size);
278 static int dtrace_method_entry(JavaThread* thread, Method* m);
279 static int dtrace_method_exit(JavaThread* thread, Method* m);
281 // Utility method for retrieving the Java thread id, returns 0 if the
282 // thread is not a well formed Java thread.
283 static jlong get_java_tid(Thread* thread);
286 // used by native wrappers to reenable yellow if overflow happened in native code
287 static void reguard_yellow_pages();
289 /**
290 * Fill in the "X cannot be cast to a Y" message for ClassCastException
291 *
292 * @param thr the current thread
293 * @param name the name of the class of the object attempted to be cast
294 * @return the dynamically allocated exception message (must be freed
295 * by the caller using a resource mark)
296 *
297 * BCP must refer to the current 'checkcast' opcode for the frame
298 * on top of the stack.
299 * The caller (or one of it's callers) must use a ResourceMark
300 * in order to correctly free the result.
301 */
302 static char* generate_class_cast_message(JavaThread* thr, const char* name);
304 /**
305 * Fill in the "X cannot be cast to a Y" message for ClassCastException
306 *
307 * @param name the name of the class of the object attempted to be cast
308 * @param klass the name of the target klass attempt
309 * @param gripe the specific kind of problem being reported
310 * @return the dynamically allocated exception message (must be freed
311 * by the caller using a resource mark)
312 *
313 * This version does not require access the frame, so it can be called
314 * from interpreted code
315 * The caller (or one of it's callers) must use a ResourceMark
316 * in order to correctly free the result.
317 */
318 static char* generate_class_cast_message(const char* name, const char* klass,
319 const char* gripe = " cannot be cast to ");
321 // Resolves a call site- may patch in the destination of the call into the
322 // compiled code.
323 static methodHandle resolve_helper(JavaThread *thread,
324 bool is_virtual,
325 bool is_optimized, TRAPS);
327 private:
328 // deopt blob
329 static void generate_deopt_blob(void);
331 public:
332 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; }
334 // Resets a call-site in compiled code so it will get resolved again.
335 static methodHandle reresolve_call_site(JavaThread *thread, TRAPS);
337 // In the code prolog, if the klass comparison fails, the inline cache
338 // misses and the call site is patched to megamorphic
339 static methodHandle handle_ic_miss_helper(JavaThread* thread, TRAPS);
341 // Find the method that called us.
342 static methodHandle find_callee_method(JavaThread* thread, TRAPS);
345 private:
346 static Handle find_callee_info(JavaThread* thread,
347 Bytecodes::Code& bc,
348 CallInfo& callinfo, TRAPS);
349 static Handle find_callee_info_helper(JavaThread* thread,
350 vframeStream& vfst,
351 Bytecodes::Code& bc,
352 CallInfo& callinfo, TRAPS);
354 static address clean_virtual_call_entry();
355 static address clean_opt_virtual_call_entry();
356 static address clean_static_call_entry();
358 public:
360 // Read the array of BasicTypes from a Java signature, and compute where
361 // compiled Java code would like to put the results. Values in reg_lo and
362 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are
363 // registers, those above refer to 4-byte stack slots. All stack slots are
364 // based off of the window top. SharedInfo::stack0 refers to the first usable
365 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
366 // 4-bytes higher. So for sparc because the register window save area is at
367 // the bottom of the frame the first 16 words will be skipped and SharedInfo::stack0
368 // will be just above it. (
369 // return value is the maximum number of VMReg stack slots the convention will use.
370 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed, int is_outgoing);
372 static void check_member_name_argument_is_last_argument(methodHandle method,
373 const BasicType* sig_bt,
374 const VMRegPair* regs) NOT_DEBUG_RETURN;
376 // Ditto except for calling C
377 //
378 // C argument in register AND stack slot.
379 // Some architectures require that an argument must be passed in a register
380 // AND in a stack slot. These architectures provide a second VMRegPair array
381 // to be filled by the c_calling_convention method. On other architectures,
382 // NULL is being passed as the second VMRegPair array, so arguments are either
383 // passed in a register OR in a stack slot.
384 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, VMRegPair *regs2,
385 int total_args_passed);
387 // Compute the new number of arguments in the signature if 32 bit ints
388 // must be converted to longs. Needed if CCallingConventionRequiresIntsAsLongs
389 // is true.
390 static int convert_ints_to_longints_argcnt(int in_args_count, BasicType* in_sig_bt);
391 // Adapt a method's signature if it contains 32 bit integers that must
392 // be converted to longs. Needed if CCallingConventionRequiresIntsAsLongs
393 // is true.
394 static void convert_ints_to_longints(int i2l_argcnt, int& in_args_count,
395 BasicType*& in_sig_bt, VMRegPair*& in_regs);
397 // Generate I2C and C2I adapters. These adapters are simple argument marshalling
398 // blobs. Unlike adapters in the tiger and earlier releases the code in these
399 // blobs does not create a new frame and are therefore virtually invisible
400 // to the stack walking code. In general these blobs extend the callers stack
401 // as needed for the conversion of argument locations.
403 // When calling a c2i blob the code will always call the interpreter even if
404 // by the time we reach the blob there is compiled code available. This allows
405 // the blob to pass the incoming stack pointer (the sender sp) in a known
406 // location for the interpreter to record. This is used by the frame code
407 // to correct the sender code to match up with the stack pointer when the
408 // thread left the compiled code. In addition it allows the interpreter
409 // to remove the space the c2i adapter allocated to do its argument conversion.
411 // Although a c2i blob will always run interpreted even if compiled code is
412 // present if we see that compiled code is present the compiled call site
413 // will be patched/re-resolved so that later calls will run compiled.
415 // Aditionally a c2i blob need to have a unverified entry because it can be reached
416 // in situations where the call site is an inlined cache site and may go megamorphic.
418 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed
419 // that the interpreter before it does any call dispatch will record the current
420 // stack pointer in the interpreter frame. On return it will restore the stack
421 // pointer as needed. This means the i2c adapter code doesn't need any special
422 // handshaking path with compiled code to keep the stack walking correct.
424 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *_masm,
425 int total_args_passed,
426 int max_arg,
427 const BasicType *sig_bt,
428 const VMRegPair *regs,
429 AdapterFingerPrint* fingerprint);
431 // OSR support
433 // OSR_migration_begin will extract the jvm state from an interpreter
434 // frame (locals, monitors) and store the data in a piece of C heap
435 // storage. This then allows the interpreter frame to be removed from the
436 // stack and the OSR nmethod to be called. That method is called with a
437 // pointer to the C heap storage. This pointer is the return value from
438 // OSR_migration_begin.
440 static intptr_t* OSR_migration_begin( JavaThread *thread);
442 // OSR_migration_end is a trivial routine. It is called after the compiled
443 // method has extracted the jvm state from the C heap that OSR_migration_begin
444 // created. It's entire job is to simply free this storage.
445 static void OSR_migration_end ( intptr_t* buf);
447 // Convert a sig into a calling convention register layout
448 // and find interesting things about it.
449 static VMRegPair* find_callee_arguments(Symbol* sig, bool has_receiver, bool has_appendix, int *arg_size);
450 static VMReg name_for_receiver();
452 // "Top of Stack" slots that may be unused by the calling convention but must
453 // otherwise be preserved.
454 // On Intel these are not necessary and the value can be zero.
455 // On Sparc this describes the words reserved for storing a register window
456 // when an interrupt occurs.
457 static uint out_preserve_stack_slots();
459 // Is vector's size (in bytes) bigger than a size saved by default?
460 // For example, on x86 16 bytes XMM registers are saved by default.
461 static bool is_wide_vector(int size);
463 // Save and restore a native result
464 static void save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots );
465 static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots );
467 // Generate a native wrapper for a given method. The method takes arguments
468 // in the Java compiled code convention, marshals them to the native
469 // convention (handlizes oops, etc), transitions to native, makes the call,
470 // returns to java state (possibly blocking), unhandlizes any result and
471 // returns.
472 //
473 // The wrapper may contain special-case code if the given method
474 // is a JNI critical method, or a compiled method handle adapter,
475 // such as _invokeBasic, _linkToVirtual, etc.
476 static nmethod* generate_native_wrapper(MacroAssembler* masm,
477 methodHandle method,
478 int compile_id,
479 BasicType* sig_bt,
480 VMRegPair* regs,
481 BasicType ret_type );
483 // Block before entering a JNI critical method
484 static void block_for_jni_critical(JavaThread* thread);
486 #ifdef HAVE_DTRACE_H
487 // Generate a dtrace wrapper for a given method. The method takes arguments
488 // in the Java compiled code convention, marshals them to the native
489 // convention (handlizes oops, etc), transitions to native, makes the call,
490 // returns to java state (possibly blocking), unhandlizes any result and
491 // returns.
492 static nmethod *generate_dtrace_nmethod(MacroAssembler* masm,
493 methodHandle method);
495 // dtrace support to convert a Java string to utf8
496 static void get_utf(oopDesc* src, address dst);
497 #endif // def HAVE_DTRACE_H
499 // A compiled caller has just called the interpreter, but compiled code
500 // exists. Patch the caller so he no longer calls into the interpreter.
501 static void fixup_callers_callsite(Method* moop, address ret_pc);
503 // Slow-path Locking and Unlocking
504 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* thread);
505 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock);
507 // Resolving of calls
508 static address resolve_static_call_C (JavaThread *thread);
509 static address resolve_virtual_call_C (JavaThread *thread);
510 static address resolve_opt_virtual_call_C(JavaThread *thread);
512 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.)
513 static void slow_arraycopy_C(oopDesc* src, jint src_pos,
514 oopDesc* dest, jint dest_pos,
515 jint length, JavaThread* thread);
517 // handle ic miss with caller being compiled code
518 // wrong method handling (inline cache misses, zombie methods)
519 static address handle_wrong_method(JavaThread* thread);
520 static address handle_wrong_method_abstract(JavaThread* thread);
521 static address handle_wrong_method_ic_miss(JavaThread* thread);
523 #ifndef PRODUCT
525 // Collect and print inline cache miss statistics
526 private:
527 enum { maxICmiss_count = 100 };
528 static int _ICmiss_index; // length of IC miss histogram
529 static int _ICmiss_count[maxICmiss_count]; // miss counts
530 static address _ICmiss_at[maxICmiss_count]; // miss addresses
531 static void trace_ic_miss(address at);
533 public:
534 static int _monitor_enter_ctr; // monitor enter slow
535 static int _monitor_exit_ctr; // monitor exit slow
536 static int _throw_null_ctr; // throwing a null-pointer exception
537 static int _ic_miss_ctr; // total # of IC misses
538 static int _wrong_method_ctr;
539 static int _resolve_static_ctr;
540 static int _resolve_virtual_ctr;
541 static int _resolve_opt_virtual_ctr;
542 static int _implicit_null_throws;
543 static int _implicit_div0_throws;
545 static int _jbyte_array_copy_ctr; // Slow-path byte array copy
546 static int _jshort_array_copy_ctr; // Slow-path short array copy
547 static int _jint_array_copy_ctr; // Slow-path int array copy
548 static int _jlong_array_copy_ctr; // Slow-path long array copy
549 static int _oop_array_copy_ctr; // Slow-path oop array copy
550 static int _checkcast_array_copy_ctr; // Slow-path oop array copy, with cast
551 static int _unsafe_array_copy_ctr; // Slow-path includes alignment checks
552 static int _generic_array_copy_ctr; // Slow-path includes type decoding
553 static int _slow_array_copy_ctr; // Slow-path failed out to a method call
555 static int _new_instance_ctr; // 'new' object requires GC
556 static int _new_array_ctr; // 'new' array requires GC
557 static int _multi1_ctr, _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr;
558 static int _find_handler_ctr; // find exception handler
559 static int _rethrow_ctr; // rethrow exception
560 static int _mon_enter_stub_ctr; // monitor enter stub
561 static int _mon_exit_stub_ctr; // monitor exit stub
562 static int _mon_enter_ctr; // monitor enter slow
563 static int _mon_exit_ctr; // monitor exit slow
564 static int _partial_subtype_ctr; // SubRoutines::partial_subtype_check
566 // Statistics code
567 // stats for "normal" compiled calls (non-interface)
568 static int _nof_normal_calls; // total # of calls
569 static int _nof_optimized_calls; // total # of statically-bound calls
570 static int _nof_inlined_calls; // total # of inlined normal calls
571 static int _nof_static_calls; // total # of calls to static methods or super methods (invokespecial)
572 static int _nof_inlined_static_calls; // total # of inlined static calls
573 // stats for compiled interface calls
574 static int _nof_interface_calls; // total # of compiled calls
575 static int _nof_optimized_interface_calls; // total # of statically-bound interface calls
576 static int _nof_inlined_interface_calls; // total # of inlined interface calls
577 static int _nof_megamorphic_interface_calls;// total # of megamorphic interface calls
578 // stats for runtime exceptions
579 static int _nof_removable_exceptions; // total # of exceptions that could be replaced by branches due to inlining
581 public: // for compiler
582 static address nof_normal_calls_addr() { return (address)&_nof_normal_calls; }
583 static address nof_optimized_calls_addr() { return (address)&_nof_optimized_calls; }
584 static address nof_inlined_calls_addr() { return (address)&_nof_inlined_calls; }
585 static address nof_static_calls_addr() { return (address)&_nof_static_calls; }
586 static address nof_inlined_static_calls_addr() { return (address)&_nof_inlined_static_calls; }
587 static address nof_interface_calls_addr() { return (address)&_nof_interface_calls; }
588 static address nof_optimized_interface_calls_addr() { return (address)&_nof_optimized_interface_calls; }
589 static address nof_inlined_interface_calls_addr() { return (address)&_nof_inlined_interface_calls; }
590 static address nof_megamorphic_interface_calls_addr() { return (address)&_nof_megamorphic_interface_calls; }
591 static void print_call_statistics(int comp_total);
592 static void print_statistics();
593 static void print_ic_miss_histogram();
595 #endif // PRODUCT
596 static void print_long(long long i);
597 static void print_int(int i);
598 static void print_float(float i);
599 static void print_double(double i);
600 static void print_str(char *str);
602 static void print_reg_with_pc(char *reg_name, long i, long pc);
603 };
606 // ---------------------------------------------------------------------------
607 // Implementation of AdapterHandlerLibrary
608 //
609 // This library manages argument marshaling adapters and native wrappers.
610 // There are 2 flavors of adapters: I2C and C2I.
611 //
612 // The I2C flavor takes a stock interpreted call setup, marshals the
613 // arguments for a Java-compiled call, and jumps to Rmethod-> code()->
614 // code_begin(). It is broken to call it without an nmethod assigned.
615 // The usual behavior is to lift any register arguments up out of the
616 // stack and possibly re-pack the extra arguments to be contigious.
617 // I2C adapters will save what the interpreter's stack pointer will be
618 // after arguments are popped, then adjust the interpreter's frame
619 // size to force alignment and possibly to repack the arguments.
620 // After re-packing, it jumps to the compiled code start. There are
621 // no safepoints in this adapter code and a GC cannot happen while
622 // marshaling is in progress.
623 //
624 // The C2I flavor takes a stock compiled call setup plus the target method in
625 // Rmethod, marshals the arguments for an interpreted call and jumps to
626 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been
627 // setup. Compiled frames are fixed-size and the args are likely not in the
628 // right place. Hence all the args will likely be copied into the
629 // interpreter's frame, forcing that frame to grow. The compiled frame's
630 // outgoing stack args will be dead after the copy.
631 //
632 // Native wrappers, like adapters, marshal arguments. Unlike adapters they
633 // also perform an offical frame push & pop. They have a call to the native
634 // routine in their middles and end in a return (instead of ending in a jump).
635 // The native wrappers are stored in real nmethods instead of the BufferBlobs
636 // used by the adapters. The code generation happens here because it's very
637 // similar to what the adapters have to do.
639 class AdapterHandlerEntry : public BasicHashtableEntry<mtCode> {
640 friend class AdapterHandlerTable;
642 private:
643 AdapterFingerPrint* _fingerprint;
644 address _i2c_entry;
645 address _c2i_entry;
646 address _c2i_unverified_entry;
648 #ifdef ASSERT
649 // Captures code and signature used to generate this adapter when
650 // verifing adapter equivalence.
651 unsigned char* _saved_code;
652 int _saved_code_length;
653 #endif
655 void init(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_unverified_entry) {
656 _fingerprint = fingerprint;
657 _i2c_entry = i2c_entry;
658 _c2i_entry = c2i_entry;
659 _c2i_unverified_entry = c2i_unverified_entry;
660 #ifdef ASSERT
661 _saved_code = NULL;
662 _saved_code_length = 0;
663 #endif
664 }
666 void deallocate();
668 // should never be used
669 AdapterHandlerEntry();
671 public:
672 address get_i2c_entry() const { return _i2c_entry; }
673 address get_c2i_entry() const { return _c2i_entry; }
674 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; }
675 address base_address();
676 void relocate(address new_base);
678 AdapterFingerPrint* fingerprint() const { return _fingerprint; }
680 AdapterHandlerEntry* next() {
681 return (AdapterHandlerEntry*)BasicHashtableEntry<mtCode>::next();
682 }
684 #ifdef ASSERT
685 // Used to verify that code generated for shared adapters is equivalent
686 void save_code (unsigned char* code, int length);
687 bool compare_code(unsigned char* code, int length);
688 #endif
690 //virtual void print_on(outputStream* st) const; DO NOT USE
691 void print_adapter_on(outputStream* st) const;
692 };
694 class AdapterHandlerLibrary: public AllStatic {
695 private:
696 static BufferBlob* _buffer; // the temporary code buffer in CodeCache
697 static AdapterHandlerTable* _adapters;
698 static AdapterHandlerEntry* _abstract_method_handler;
699 static BufferBlob* buffer_blob();
700 static void initialize();
702 public:
704 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint,
705 address i2c_entry, address c2i_entry, address c2i_unverified_entry);
706 static void create_native_wrapper(methodHandle method);
707 static AdapterHandlerEntry* get_adapter(methodHandle method);
709 #ifdef HAVE_DTRACE_H
710 static nmethod* create_dtrace_nmethod (methodHandle method);
711 #endif // HAVE_DTRACE_H
713 static void print_handler(CodeBlob* b) { print_handler_on(tty, b); }
714 static void print_handler_on(outputStream* st, CodeBlob* b);
715 static bool contains(CodeBlob* b);
716 #ifndef PRODUCT
717 static void print_statistics();
718 #endif /* PRODUCT */
720 };
722 #endif // SHARE_VM_RUNTIME_SHAREDRUNTIME_HPP