Mercurial > hg > truffle
annotate src/share/vm/runtime/sharedRuntime.hpp @ 396:4d05b7cb7842
6306922: Dump dump created by +HeapDumpOnOutOfMemoryError should include stack traces for stack roots
Summary: Include stack traces of all threads in the heap dump
Reviewed-by: alanb
author | mchung |
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date | Tue, 14 Oct 2008 15:16:38 -0700 |
parents | 1ee8caae33af |
children | 70998f2e05ef |
rev | line source |
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0 | 1 /* |
196 | 2 * Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved. |
0 | 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 class AdapterHandlerEntry; | |
26 class vframeStream; | |
27 | |
28 // Runtime is the base class for various runtime interfaces | |
29 // (InterpreterRuntime, CompilerRuntime, etc.). It provides | |
30 // shared functionality such as exception forwarding (C++ to | |
31 // Java exceptions), locking/unlocking mechanisms, statistical | |
32 // information, etc. | |
33 | |
34 class SharedRuntime: AllStatic { | |
35 private: | |
36 static methodHandle resolve_sub_helper(JavaThread *thread, | |
37 bool is_virtual, | |
38 bool is_optimized, TRAPS); | |
39 | |
40 // Shared stub locations | |
41 | |
42 static RuntimeStub* _wrong_method_blob; | |
43 static RuntimeStub* _ic_miss_blob; | |
44 static RuntimeStub* _resolve_opt_virtual_call_blob; | |
45 static RuntimeStub* _resolve_virtual_call_blob; | |
46 static RuntimeStub* _resolve_static_call_blob; | |
47 | |
48 static SafepointBlob* _polling_page_safepoint_handler_blob; | |
49 static SafepointBlob* _polling_page_return_handler_blob; | |
50 #ifdef COMPILER2 | |
51 static ExceptionBlob* _exception_blob; | |
52 static UncommonTrapBlob* _uncommon_trap_blob; | |
53 #endif // COMPILER2 | |
54 | |
55 #ifndef PRODUCT | |
56 | |
57 // Counters | |
58 static int _nof_megamorphic_calls; // total # of megamorphic calls (through vtable) | |
59 | |
60 #endif // !PRODUCT | |
61 public: | |
116
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62 |
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63 // max bytes for each dtrace string parameter |
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64 enum { max_dtrace_string_size = 256 }; |
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65 |
0 | 66 // The following arithmetic routines are used on platforms that do |
67 // not have machine instructions to implement their functionality. | |
68 // Do not remove these. | |
69 | |
70 // long arithmetics | |
71 static jlong lmul(jlong y, jlong x); | |
72 static jlong ldiv(jlong y, jlong x); | |
73 static jlong lrem(jlong y, jlong x); | |
74 | |
75 // float and double remainder | |
76 static jfloat frem(jfloat x, jfloat y); | |
77 static jdouble drem(jdouble x, jdouble y); | |
78 | |
79 // float conversion (needs to set appropriate rounding mode) | |
80 static jint f2i (jfloat x); | |
81 static jlong f2l (jfloat x); | |
82 static jint d2i (jdouble x); | |
83 static jlong d2l (jdouble x); | |
84 static jfloat d2f (jdouble x); | |
85 static jfloat l2f (jlong x); | |
86 static jdouble l2d (jlong x); | |
87 | |
88 // double trigonometrics and transcendentals | |
89 static jdouble dsin(jdouble x); | |
90 static jdouble dcos(jdouble x); | |
91 static jdouble dtan(jdouble x); | |
92 static jdouble dlog(jdouble x); | |
93 static jdouble dlog10(jdouble x); | |
94 static jdouble dexp(jdouble x); | |
95 static jdouble dpow(jdouble x, jdouble y); | |
96 | |
97 | |
98 // exception handling across interpreter/compiler boundaries | |
99 static address raw_exception_handler_for_return_address(address return_address); | |
100 static address exception_handler_for_return_address(address return_address); | |
101 | |
342
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102 #ifndef SERIALGC |
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103 // G1 write barriers |
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104 static void g1_wb_pre(oopDesc* orig, JavaThread *thread); |
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105 static void g1_wb_post(void* card_addr, JavaThread* thread); |
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106 #endif // !SERIALGC |
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107 |
0 | 108 // exception handling and implicit exceptions |
109 static address compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception, | |
110 bool force_unwind, bool top_frame_only); | |
111 enum ImplicitExceptionKind { | |
112 IMPLICIT_NULL, | |
113 IMPLICIT_DIVIDE_BY_ZERO, | |
114 STACK_OVERFLOW | |
115 }; | |
116 static void throw_AbstractMethodError(JavaThread* thread); | |
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117 static void throw_IncompatibleClassChangeError(JavaThread* thread); |
0 | 118 static void throw_ArithmeticException(JavaThread* thread); |
119 static void throw_NullPointerException(JavaThread* thread); | |
120 static void throw_NullPointerException_at_call(JavaThread* thread); | |
121 static void throw_StackOverflowError(JavaThread* thread); | |
122 static address continuation_for_implicit_exception(JavaThread* thread, | |
123 address faulting_pc, | |
124 ImplicitExceptionKind exception_kind); | |
125 | |
126 // Shared stub locations | |
127 static address get_poll_stub(address pc); | |
128 | |
129 static address get_ic_miss_stub() { | |
130 assert(_ic_miss_blob!= NULL, "oops"); | |
131 return _ic_miss_blob->instructions_begin(); | |
132 } | |
133 | |
134 static address get_handle_wrong_method_stub() { | |
135 assert(_wrong_method_blob!= NULL, "oops"); | |
136 return _wrong_method_blob->instructions_begin(); | |
137 } | |
138 | |
139 #ifdef COMPILER2 | |
140 static void generate_uncommon_trap_blob(void); | |
141 static UncommonTrapBlob* uncommon_trap_blob() { return _uncommon_trap_blob; } | |
142 #endif // COMPILER2 | |
143 | |
144 static address get_resolve_opt_virtual_call_stub(){ | |
145 assert(_resolve_opt_virtual_call_blob != NULL, "oops"); | |
146 return _resolve_opt_virtual_call_blob->instructions_begin(); | |
147 } | |
148 static address get_resolve_virtual_call_stub() { | |
149 assert(_resolve_virtual_call_blob != NULL, "oops"); | |
150 return _resolve_virtual_call_blob->instructions_begin(); | |
151 } | |
152 static address get_resolve_static_call_stub() { | |
153 assert(_resolve_static_call_blob != NULL, "oops"); | |
154 return _resolve_static_call_blob->instructions_begin(); | |
155 } | |
156 | |
157 static SafepointBlob* polling_page_return_handler_blob() { return _polling_page_return_handler_blob; } | |
158 static SafepointBlob* polling_page_safepoint_handler_blob() { return _polling_page_safepoint_handler_blob; } | |
159 | |
160 // Counters | |
161 #ifndef PRODUCT | |
162 static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; } | |
163 #endif // PRODUCT | |
164 | |
165 // Helper routine for full-speed JVMTI exception throwing support | |
166 static void throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception); | |
167 static void throw_and_post_jvmti_exception(JavaThread *thread, symbolOop name, const char *message = NULL); | |
168 | |
169 // To be used as the entry point for unresolved native methods. | |
170 static address native_method_throw_unsatisfied_link_error_entry(); | |
171 | |
172 // bytecode tracing is only used by the TraceBytecodes | |
173 static intptr_t trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2) PRODUCT_RETURN0; | |
174 | |
175 // Used to back off a spin lock that is under heavy contention | |
176 static void yield_all(JavaThread* thread, int attempts = 0); | |
177 | |
178 static oop retrieve_receiver( symbolHandle sig, frame caller ); | |
179 | |
180 static void verify_caller_frame(frame caller_frame, methodHandle callee_method) PRODUCT_RETURN; | |
181 static methodHandle find_callee_method_inside_interpreter(frame caller_frame, methodHandle caller_method, int bci) PRODUCT_RETURN_(return methodHandle();); | |
182 | |
183 static void register_finalizer(JavaThread* thread, oopDesc* obj); | |
184 | |
185 // dtrace notifications | |
186 static int dtrace_object_alloc(oopDesc* o); | |
187 static int dtrace_object_alloc_base(Thread* thread, oopDesc* o); | |
188 static int dtrace_method_entry(JavaThread* thread, methodOopDesc* m); | |
189 static int dtrace_method_exit(JavaThread* thread, methodOopDesc* m); | |
190 | |
191 // Utility method for retrieving the Java thread id, returns 0 if the | |
192 // thread is not a well formed Java thread. | |
193 static jlong get_java_tid(Thread* thread); | |
194 | |
195 | |
196 // used by native wrappers to reenable yellow if overflow happened in native code | |
197 static void reguard_yellow_pages(); | |
198 | |
199 /** | |
200 * Fill in the "X cannot be cast to a Y" message for ClassCastException | |
201 * | |
202 * @param thr the current thread | |
203 * @param name the name of the class of the object attempted to be cast | |
204 * @return the dynamically allocated exception message (must be freed | |
205 * by the caller using a resource mark) | |
206 * | |
207 * BCP must refer to the current 'checkcast' opcode for the frame | |
208 * on top of the stack. | |
209 * The caller (or one of it's callers) must use a ResourceMark | |
210 * in order to correctly free the result. | |
211 */ | |
212 static char* generate_class_cast_message(JavaThread* thr, const char* name); | |
213 | |
214 /** | |
215 * Fill in the "X cannot be cast to a Y" message for ClassCastException | |
216 * | |
217 * @param name the name of the class of the object attempted to be cast | |
218 * @param klass the name of the target klass attempt | |
219 * @return the dynamically allocated exception message (must be freed | |
220 * by the caller using a resource mark) | |
221 * | |
222 * This version does not require access the frame, so it can be called | |
223 * from interpreted code | |
224 * The caller (or one of it's callers) must use a ResourceMark | |
225 * in order to correctly free the result. | |
226 */ | |
227 static char* generate_class_cast_message(const char* name, const char* klass); | |
228 | |
229 // Resolves a call site- may patch in the destination of the call into the | |
230 // compiled code. | |
231 static methodHandle resolve_helper(JavaThread *thread, | |
232 bool is_virtual, | |
233 bool is_optimized, TRAPS); | |
234 | |
235 static void generate_stubs(void); | |
236 | |
237 private: | |
238 // deopt blob | |
239 static void generate_deopt_blob(void); | |
240 static DeoptimizationBlob* _deopt_blob; | |
241 | |
242 public: | |
243 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; } | |
244 | |
245 // Resets a call-site in compiled code so it will get resolved again. | |
246 static methodHandle reresolve_call_site(JavaThread *thread, TRAPS); | |
247 | |
248 // In the code prolog, if the klass comparison fails, the inline cache | |
249 // misses and the call site is patched to megamorphic | |
250 static methodHandle handle_ic_miss_helper(JavaThread* thread, TRAPS); | |
251 | |
252 // Find the method that called us. | |
253 static methodHandle find_callee_method(JavaThread* thread, TRAPS); | |
254 | |
255 | |
256 private: | |
257 static Handle find_callee_info(JavaThread* thread, | |
258 Bytecodes::Code& bc, | |
259 CallInfo& callinfo, TRAPS); | |
260 static Handle find_callee_info_helper(JavaThread* thread, | |
261 vframeStream& vfst, | |
262 Bytecodes::Code& bc, | |
263 CallInfo& callinfo, TRAPS); | |
264 | |
265 static address clean_virtual_call_entry(); | |
266 static address clean_opt_virtual_call_entry(); | |
267 static address clean_static_call_entry(); | |
268 | |
269 public: | |
270 | |
271 // Read the array of BasicTypes from a Java signature, and compute where | |
272 // compiled Java code would like to put the results. Values in reg_lo and | |
273 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are | |
274 // registers, those above refer to 4-byte stack slots. All stack slots are | |
275 // based off of the window top. SharedInfo::stack0 refers to the first usable | |
276 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word | |
277 // 4-bytes higher. So for sparc because the register window save area is at | |
278 // the bottom of the frame the first 16 words will be skipped and SharedInfo::stack0 | |
279 // will be just above it. ( | |
280 // return value is the maximum number of VMReg stack slots the convention will use. | |
281 static int java_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed, int is_outgoing); | |
282 | |
283 // Ditto except for calling C | |
284 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed); | |
285 | |
286 // Generate I2C and C2I adapters. These adapters are simple argument marshalling | |
287 // blobs. Unlike adapters in the tiger and earlier releases the code in these | |
288 // blobs does not create a new frame and are therefore virtually invisible | |
289 // to the stack walking code. In general these blobs extend the callers stack | |
290 // as needed for the conversion of argument locations. | |
291 | |
292 // When calling a c2i blob the code will always call the interpreter even if | |
293 // by the time we reach the blob there is compiled code available. This allows | |
294 // the blob to pass the incoming stack pointer (the sender sp) in a known | |
295 // location for the interpreter to record. This is used by the frame code | |
296 // to correct the sender code to match up with the stack pointer when the | |
297 // thread left the compiled code. In addition it allows the interpreter | |
298 // to remove the space the c2i adapter allocated to do it argument conversion. | |
299 | |
300 // Although a c2i blob will always run interpreted even if compiled code is | |
301 // present if we see that compiled code is present the compiled call site | |
302 // will be patched/re-resolved so that later calls will run compiled. | |
303 | |
304 // Aditionally a c2i blob need to have a unverified entry because it can be reached | |
305 // in situations where the call site is an inlined cache site and may go megamorphic. | |
306 | |
307 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed | |
308 // that the interpreter before it does any call dispatch will record the current | |
309 // stack pointer in the interpreter frame. On return it will restore the stack | |
310 // pointer as needed. This means the i2c adapter code doesn't need any special | |
311 // handshaking path with compiled code to keep the stack walking correct. | |
312 | |
313 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *_masm, | |
314 int total_args_passed, | |
315 int max_arg, | |
316 const BasicType *sig_bt, | |
317 const VMRegPair *regs); | |
318 | |
319 // OSR support | |
320 | |
321 // OSR_migration_begin will extract the jvm state from an interpreter | |
322 // frame (locals, monitors) and store the data in a piece of C heap | |
323 // storage. This then allows the interpreter frame to be removed from the | |
324 // stack and the OSR nmethod to be called. That method is called with a | |
325 // pointer to the C heap storage. This pointer is the return value from | |
326 // OSR_migration_begin. | |
327 | |
328 static intptr_t* OSR_migration_begin( JavaThread *thread); | |
329 | |
330 // OSR_migration_end is a trivial routine. It is called after the compiled | |
331 // method has extracted the jvm state from the C heap that OSR_migration_begin | |
332 // created. It's entire job is to simply free this storage. | |
333 static void OSR_migration_end ( intptr_t* buf); | |
334 | |
335 // Convert a sig into a calling convention register layout | |
336 // and find interesting things about it. | |
337 static VMRegPair* find_callee_arguments(symbolOop sig, bool is_static, int *arg_size); | |
338 static VMReg name_for_receiver(); | |
339 | |
340 // "Top of Stack" slots that may be unused by the calling convention but must | |
341 // otherwise be preserved. | |
342 // On Intel these are not necessary and the value can be zero. | |
343 // On Sparc this describes the words reserved for storing a register window | |
344 // when an interrupt occurs. | |
345 static uint out_preserve_stack_slots(); | |
346 | |
347 // Save and restore a native result | |
348 static void save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots ); | |
349 static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots ); | |
350 | |
351 // Generate a native wrapper for a given method. The method takes arguments | |
352 // in the Java compiled code convention, marshals them to the native | |
353 // convention (handlizes oops, etc), transitions to native, makes the call, | |
354 // returns to java state (possibly blocking), unhandlizes any result and | |
355 // returns. | |
356 static nmethod *generate_native_wrapper(MacroAssembler* masm, | |
357 methodHandle method, | |
358 int total_args_passed, | |
359 int max_arg, | |
360 BasicType *sig_bt, | |
361 VMRegPair *regs, | |
362 BasicType ret_type ); | |
363 | |
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364 #ifdef HAVE_DTRACE_H |
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365 // Generate a dtrace wrapper for a given method. The method takes arguments |
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366 // in the Java compiled code convention, marshals them to the native |
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367 // convention (handlizes oops, etc), transitions to native, makes the call, |
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368 // returns to java state (possibly blocking), unhandlizes any result and |
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369 // returns. |
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370 static nmethod *generate_dtrace_nmethod(MacroAssembler* masm, |
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371 methodHandle method); |
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372 |
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373 // dtrace support to convert a Java string to utf8 |
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374 static void get_utf(oopDesc* src, address dst); |
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375 #endif // def HAVE_DTRACE_H |
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376 |
0 | 377 // A compiled caller has just called the interpreter, but compiled code |
378 // exists. Patch the caller so he no longer calls into the interpreter. | |
379 static void fixup_callers_callsite(methodOopDesc* moop, address ret_pc); | |
380 | |
381 // Slow-path Locking and Unlocking | |
382 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* thread); | |
383 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock); | |
384 | |
385 // Resolving of calls | |
386 static address resolve_static_call_C (JavaThread *thread); | |
387 static address resolve_virtual_call_C (JavaThread *thread); | |
388 static address resolve_opt_virtual_call_C(JavaThread *thread); | |
389 | |
390 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.) | |
391 static void slow_arraycopy_C(oopDesc* src, jint src_pos, | |
392 oopDesc* dest, jint dest_pos, | |
393 jint length, JavaThread* thread); | |
394 | |
395 // handle ic miss with caller being compiled code | |
396 // wrong method handling (inline cache misses, zombie methods) | |
397 static address handle_wrong_method(JavaThread* thread); | |
398 static address handle_wrong_method_ic_miss(JavaThread* thread); | |
399 | |
400 #ifndef PRODUCT | |
401 | |
402 // Collect and print inline cache miss statistics | |
403 private: | |
404 enum { maxICmiss_count = 100 }; | |
405 static int _ICmiss_index; // length of IC miss histogram | |
406 static int _ICmiss_count[maxICmiss_count]; // miss counts | |
407 static address _ICmiss_at[maxICmiss_count]; // miss addresses | |
408 static void trace_ic_miss(address at); | |
409 | |
410 public: | |
411 static int _monitor_enter_ctr; // monitor enter slow | |
412 static int _monitor_exit_ctr; // monitor exit slow | |
413 static int _throw_null_ctr; // throwing a null-pointer exception | |
414 static int _ic_miss_ctr; // total # of IC misses | |
415 static int _wrong_method_ctr; | |
416 static int _resolve_static_ctr; | |
417 static int _resolve_virtual_ctr; | |
418 static int _resolve_opt_virtual_ctr; | |
419 static int _implicit_null_throws; | |
420 static int _implicit_div0_throws; | |
421 | |
422 static int _jbyte_array_copy_ctr; // Slow-path byte array copy | |
423 static int _jshort_array_copy_ctr; // Slow-path short array copy | |
424 static int _jint_array_copy_ctr; // Slow-path int array copy | |
425 static int _jlong_array_copy_ctr; // Slow-path long array copy | |
426 static int _oop_array_copy_ctr; // Slow-path oop array copy | |
427 static int _checkcast_array_copy_ctr; // Slow-path oop array copy, with cast | |
428 static int _unsafe_array_copy_ctr; // Slow-path includes alignment checks | |
429 static int _generic_array_copy_ctr; // Slow-path includes type decoding | |
430 static int _slow_array_copy_ctr; // Slow-path failed out to a method call | |
431 | |
432 static int _new_instance_ctr; // 'new' object requires GC | |
433 static int _new_array_ctr; // 'new' array requires GC | |
434 static int _multi1_ctr, _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr; | |
435 static int _find_handler_ctr; // find exception handler | |
436 static int _rethrow_ctr; // rethrow exception | |
437 static int _mon_enter_stub_ctr; // monitor enter stub | |
438 static int _mon_exit_stub_ctr; // monitor exit stub | |
439 static int _mon_enter_ctr; // monitor enter slow | |
440 static int _mon_exit_ctr; // monitor exit slow | |
441 static int _partial_subtype_ctr; // SubRoutines::partial_subtype_check | |
442 | |
443 // Statistics code | |
444 // stats for "normal" compiled calls (non-interface) | |
445 static int _nof_normal_calls; // total # of calls | |
446 static int _nof_optimized_calls; // total # of statically-bound calls | |
447 static int _nof_inlined_calls; // total # of inlined normal calls | |
448 static int _nof_static_calls; // total # of calls to static methods or super methods (invokespecial) | |
449 static int _nof_inlined_static_calls; // total # of inlined static calls | |
450 // stats for compiled interface calls | |
451 static int _nof_interface_calls; // total # of compiled calls | |
452 static int _nof_optimized_interface_calls; // total # of statically-bound interface calls | |
453 static int _nof_inlined_interface_calls; // total # of inlined interface calls | |
454 static int _nof_megamorphic_interface_calls;// total # of megamorphic interface calls | |
455 // stats for runtime exceptions | |
456 static int _nof_removable_exceptions; // total # of exceptions that could be replaced by branches due to inlining | |
457 | |
458 public: // for compiler | |
459 static address nof_normal_calls_addr() { return (address)&_nof_normal_calls; } | |
460 static address nof_optimized_calls_addr() { return (address)&_nof_optimized_calls; } | |
461 static address nof_inlined_calls_addr() { return (address)&_nof_inlined_calls; } | |
462 static address nof_static_calls_addr() { return (address)&_nof_static_calls; } | |
463 static address nof_inlined_static_calls_addr() { return (address)&_nof_inlined_static_calls; } | |
464 static address nof_interface_calls_addr() { return (address)&_nof_interface_calls; } | |
465 static address nof_optimized_interface_calls_addr() { return (address)&_nof_optimized_interface_calls; } | |
466 static address nof_inlined_interface_calls_addr() { return (address)&_nof_inlined_interface_calls; } | |
467 static address nof_megamorphic_interface_calls_addr() { return (address)&_nof_megamorphic_interface_calls; } | |
468 static void print_call_statistics(int comp_total); | |
469 static void print_statistics(); | |
470 static void print_ic_miss_histogram(); | |
471 | |
472 #endif // PRODUCT | |
473 }; | |
474 | |
475 | |
476 // --------------------------------------------------------------------------- | |
477 // Implementation of AdapterHandlerLibrary | |
478 // | |
479 // This library manages argument marshaling adapters and native wrappers. | |
480 // There are 2 flavors of adapters: I2C and C2I. | |
481 // | |
482 // The I2C flavor takes a stock interpreted call setup, marshals the arguments | |
483 // for a Java-compiled call, and jumps to Rmethod-> code()-> | |
484 // instructions_begin(). It is broken to call it without an nmethod assigned. | |
485 // The usual behavior is to lift any register arguments up out of the stack | |
486 // and possibly re-pack the extra arguments to be contigious. I2C adapters | |
487 // will save what the interpreter's stack pointer will be after arguments are | |
488 // popped, then adjust the interpreter's frame size to force alignment and | |
489 // possibly to repack the arguments. After re-packing, it jumps to the | |
490 // compiled code start. There are no safepoints in this adapter code and a GC | |
491 // cannot happen while marshaling is in progress. | |
492 // | |
493 // The C2I flavor takes a stock compiled call setup plus the target method in | |
494 // Rmethod, marshals the arguments for an interpreted call and jumps to | |
495 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been | |
496 // setup. Compiled frames are fixed-size and the args are likely not in the | |
497 // right place. Hence all the args will likely be copied into the | |
498 // interpreter's frame, forcing that frame to grow. The compiled frame's | |
499 // outgoing stack args will be dead after the copy. | |
500 // | |
501 // Native wrappers, like adapters, marshal arguments. Unlike adapters they | |
502 // also perform an offical frame push & pop. They have a call to the native | |
503 // routine in their middles and end in a return (instead of ending in a jump). | |
504 // The native wrappers are stored in real nmethods instead of the BufferBlobs | |
505 // used by the adapters. The code generation happens here because it's very | |
506 // similar to what the adapters have to do. | |
507 | |
508 class AdapterHandlerEntry : public CHeapObj { | |
509 private: | |
510 address _i2c_entry; | |
511 address _c2i_entry; | |
512 address _c2i_unverified_entry; | |
513 | |
514 public: | |
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515 |
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516 // The name we give all buffer blobs |
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517 static const char* name; |
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518 |
0 | 519 AdapterHandlerEntry(address i2c_entry, address c2i_entry, address c2i_unverified_entry): |
520 _i2c_entry(i2c_entry), | |
521 _c2i_entry(c2i_entry), | |
522 _c2i_unverified_entry(c2i_unverified_entry) { | |
523 } | |
524 | |
525 address get_i2c_entry() { return _i2c_entry; } | |
526 address get_c2i_entry() { return _c2i_entry; } | |
527 address get_c2i_unverified_entry() { return _c2i_unverified_entry; } | |
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528 |
0 | 529 void relocate(address new_base); |
530 #ifndef PRODUCT | |
531 void print(); | |
532 #endif /* PRODUCT */ | |
533 }; | |
534 | |
535 class AdapterHandlerLibrary: public AllStatic { | |
536 private: | |
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537 static u_char _buffer[]; // the temporary code buffer |
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538 static GrowableArray<uint64_t>* _fingerprints; // the fingerprint collection |
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539 static GrowableArray<AdapterHandlerEntry*> * _handlers; // the corresponding handlers |
0 | 540 enum { |
541 AbstractMethodHandler = 1 // special handler for abstract methods | |
542 }; | |
543 static void initialize(); | |
544 static int get_create_adapter_index(methodHandle method); | |
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545 static address get_i2c_entry( int index ) { |
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546 return get_entry(index)->get_i2c_entry(); |
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547 } |
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548 static address get_c2i_entry( int index ) { |
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549 return get_entry(index)->get_c2i_entry(); |
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550 } |
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551 static address get_c2i_unverified_entry( int index ) { |
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552 return get_entry(index)->get_c2i_unverified_entry(); |
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553 } |
0 | 554 |
555 public: | |
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556 static AdapterHandlerEntry* get_entry( int index ) { return _handlers->at(index); } |
0 | 557 static nmethod* create_native_wrapper(methodHandle method); |
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558 static AdapterHandlerEntry* get_adapter(methodHandle method) { |
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559 return get_entry(get_create_adapter_index(method)); |
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560 } |
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561 #ifdef HAVE_DTRACE_H |
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562 static nmethod* create_dtrace_nmethod (methodHandle method); |
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563 #endif // HAVE_DTRACE_H |
0 | 564 |
565 #ifndef PRODUCT | |
566 static void print_handler(CodeBlob* b); | |
567 static bool contains(CodeBlob* b); | |
568 #endif /* PRODUCT */ | |
569 | |
570 }; |