Mercurial > hg > truffle
annotate src/share/vm/runtime/sharedRuntime.hpp @ 3360:30d3b13f1938
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author | ysr |
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date | Thu, 12 May 2011 15:05:22 -0700 |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_RUNTIME_SHAREDRUNTIME_HPP |
26 #define SHARE_VM_RUNTIME_SHAREDRUNTIME_HPP | |
27 | |
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" | |
35 | |
0 | 36 class AdapterHandlerEntry; |
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37 class AdapterHandlerTable; |
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38 class AdapterFingerPrint; |
0 | 39 class vframeStream; |
40 | |
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. | |
46 | |
47 class SharedRuntime: AllStatic { | |
48 private: | |
49 static methodHandle resolve_sub_helper(JavaThread *thread, | |
50 bool is_virtual, | |
51 bool is_optimized, TRAPS); | |
52 | |
53 // Shared stub locations | |
54 | |
55 static RuntimeStub* _wrong_method_blob; | |
56 static RuntimeStub* _ic_miss_blob; | |
57 static RuntimeStub* _resolve_opt_virtual_call_blob; | |
58 static RuntimeStub* _resolve_virtual_call_blob; | |
59 static RuntimeStub* _resolve_static_call_blob; | |
60 | |
61 static SafepointBlob* _polling_page_safepoint_handler_blob; | |
62 static SafepointBlob* _polling_page_return_handler_blob; | |
63 #ifdef COMPILER2 | |
64 static ExceptionBlob* _exception_blob; | |
65 static UncommonTrapBlob* _uncommon_trap_blob; | |
66 #endif // COMPILER2 | |
67 | |
68 #ifndef PRODUCT | |
69 | |
70 // Counters | |
71 static int _nof_megamorphic_calls; // total # of megamorphic calls (through vtable) | |
72 | |
73 #endif // !PRODUCT | |
74 public: | |
116
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75 |
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76 // max bytes for each dtrace string parameter |
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77 enum { max_dtrace_string_size = 256 }; |
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78 |
0 | 79 // The following arithmetic routines are used on platforms that do |
80 // not have machine instructions to implement their functionality. | |
81 // Do not remove these. | |
82 | |
83 // long arithmetics | |
84 static jlong lmul(jlong y, jlong x); | |
85 static jlong ldiv(jlong y, jlong x); | |
86 static jlong lrem(jlong y, jlong x); | |
87 | |
88 // float and double remainder | |
89 static jfloat frem(jfloat x, jfloat y); | |
90 static jdouble drem(jdouble x, jdouble y); | |
91 | |
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92 #ifdef __SOFTFP__ |
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93 static jfloat fadd(jfloat x, jfloat y); |
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94 static jfloat fsub(jfloat x, jfloat y); |
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95 static jfloat fmul(jfloat x, jfloat y); |
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96 static jfloat fdiv(jfloat x, jfloat y); |
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97 |
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98 static jdouble dadd(jdouble x, jdouble y); |
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99 static jdouble dsub(jdouble x, jdouble y); |
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100 static jdouble dmul(jdouble x, jdouble y); |
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101 static jdouble ddiv(jdouble x, jdouble y); |
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102 #endif // __SOFTFP__ |
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103 |
0 | 104 // float conversion (needs to set appropriate rounding mode) |
105 static jint f2i (jfloat x); | |
106 static jlong f2l (jfloat x); | |
107 static jint d2i (jdouble x); | |
108 static jlong d2l (jdouble x); | |
109 static jfloat d2f (jdouble x); | |
110 static jfloat l2f (jlong x); | |
111 static jdouble l2d (jlong x); | |
112 | |
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113 #ifdef __SOFTFP__ |
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114 static jfloat i2f (jint x); |
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115 static jdouble i2d (jint x); |
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116 static jdouble f2d (jfloat x); |
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117 #endif // __SOFTFP__ |
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118 |
0 | 119 // double trigonometrics and transcendentals |
120 static jdouble dsin(jdouble x); | |
121 static jdouble dcos(jdouble x); | |
122 static jdouble dtan(jdouble x); | |
123 static jdouble dlog(jdouble x); | |
124 static jdouble dlog10(jdouble x); | |
125 static jdouble dexp(jdouble x); | |
126 static jdouble dpow(jdouble x, jdouble y); | |
127 | |
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128 #if defined(__SOFTFP__) || defined(E500V2) |
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129 static double dabs(double f); |
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130 #endif |
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131 |
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132 #if defined(__SOFTFP__) || defined(PPC) |
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133 static double dsqrt(double f); |
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134 #endif |
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135 |
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136 #ifdef __SOFTFP__ |
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137 // C++ compiler generates soft float instructions as well as passing |
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138 // float and double in registers. |
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139 static int fcmpl(float x, float y); |
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140 static int fcmpg(float x, float y); |
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141 static int dcmpl(double x, double y); |
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142 static int dcmpg(double x, double y); |
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143 |
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144 static int unordered_fcmplt(float x, float y); |
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145 static int unordered_dcmplt(double x, double y); |
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146 static int unordered_fcmple(float x, float y); |
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147 static int unordered_dcmple(double x, double y); |
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148 static int unordered_fcmpge(float x, float y); |
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149 static int unordered_dcmpge(double x, double y); |
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150 static int unordered_fcmpgt(float x, float y); |
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151 static int unordered_dcmpgt(double x, double y); |
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152 |
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153 static float fneg(float f); |
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154 static double dneg(double f); |
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155 #endif |
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156 |
0 | 157 // exception handling across interpreter/compiler boundaries |
1295 | 158 static address raw_exception_handler_for_return_address(JavaThread* thread, address return_address); |
159 static address exception_handler_for_return_address(JavaThread* thread, address return_address); | |
0 | 160 |
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161 #ifndef SERIALGC |
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162 // G1 write barriers |
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163 static void g1_wb_pre(oopDesc* orig, JavaThread *thread); |
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164 static void g1_wb_post(void* card_addr, JavaThread* thread); |
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165 #endif // !SERIALGC |
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166 |
0 | 167 // exception handling and implicit exceptions |
168 static address compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception, | |
169 bool force_unwind, bool top_frame_only); | |
170 enum ImplicitExceptionKind { | |
171 IMPLICIT_NULL, | |
172 IMPLICIT_DIVIDE_BY_ZERO, | |
173 STACK_OVERFLOW | |
174 }; | |
175 static void throw_AbstractMethodError(JavaThread* thread); | |
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176 static void throw_IncompatibleClassChangeError(JavaThread* thread); |
0 | 177 static void throw_ArithmeticException(JavaThread* thread); |
178 static void throw_NullPointerException(JavaThread* thread); | |
179 static void throw_NullPointerException_at_call(JavaThread* thread); | |
180 static void throw_StackOverflowError(JavaThread* thread); | |
181 static address continuation_for_implicit_exception(JavaThread* thread, | |
182 address faulting_pc, | |
183 ImplicitExceptionKind exception_kind); | |
184 | |
185 // Shared stub locations | |
186 static address get_poll_stub(address pc); | |
187 | |
188 static address get_ic_miss_stub() { | |
189 assert(_ic_miss_blob!= NULL, "oops"); | |
1748 | 190 return _ic_miss_blob->entry_point(); |
0 | 191 } |
192 | |
193 static address get_handle_wrong_method_stub() { | |
194 assert(_wrong_method_blob!= NULL, "oops"); | |
1748 | 195 return _wrong_method_blob->entry_point(); |
0 | 196 } |
197 | |
198 #ifdef COMPILER2 | |
199 static void generate_uncommon_trap_blob(void); | |
200 static UncommonTrapBlob* uncommon_trap_blob() { return _uncommon_trap_blob; } | |
201 #endif // COMPILER2 | |
202 | |
203 static address get_resolve_opt_virtual_call_stub(){ | |
204 assert(_resolve_opt_virtual_call_blob != NULL, "oops"); | |
1748 | 205 return _resolve_opt_virtual_call_blob->entry_point(); |
0 | 206 } |
207 static address get_resolve_virtual_call_stub() { | |
208 assert(_resolve_virtual_call_blob != NULL, "oops"); | |
1748 | 209 return _resolve_virtual_call_blob->entry_point(); |
0 | 210 } |
211 static address get_resolve_static_call_stub() { | |
212 assert(_resolve_static_call_blob != NULL, "oops"); | |
1748 | 213 return _resolve_static_call_blob->entry_point(); |
0 | 214 } |
215 | |
216 static SafepointBlob* polling_page_return_handler_blob() { return _polling_page_return_handler_blob; } | |
217 static SafepointBlob* polling_page_safepoint_handler_blob() { return _polling_page_safepoint_handler_blob; } | |
218 | |
219 // Counters | |
220 #ifndef PRODUCT | |
221 static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; } | |
222 #endif // PRODUCT | |
223 | |
224 // Helper routine for full-speed JVMTI exception throwing support | |
225 static void throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception); | |
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226 static void throw_and_post_jvmti_exception(JavaThread *thread, Symbol* name, const char *message = NULL); |
0 | 227 |
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228 // RedefineClasses() tracing support for obsolete method entry |
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229 static int rc_trace_method_entry(JavaThread* thread, methodOopDesc* m); |
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230 |
0 | 231 // To be used as the entry point for unresolved native methods. |
232 static address native_method_throw_unsatisfied_link_error_entry(); | |
233 | |
234 // bytecode tracing is only used by the TraceBytecodes | |
235 static intptr_t trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2) PRODUCT_RETURN0; | |
236 | |
237 // Used to back off a spin lock that is under heavy contention | |
238 static void yield_all(JavaThread* thread, int attempts = 0); | |
239 | |
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240 static oop retrieve_receiver( Symbol* sig, frame caller ); |
0 | 241 |
242 static void register_finalizer(JavaThread* thread, oopDesc* obj); | |
243 | |
244 // dtrace notifications | |
245 static int dtrace_object_alloc(oopDesc* o); | |
246 static int dtrace_object_alloc_base(Thread* thread, oopDesc* o); | |
247 static int dtrace_method_entry(JavaThread* thread, methodOopDesc* m); | |
248 static int dtrace_method_exit(JavaThread* thread, methodOopDesc* m); | |
249 | |
250 // Utility method for retrieving the Java thread id, returns 0 if the | |
251 // thread is not a well formed Java thread. | |
252 static jlong get_java_tid(Thread* thread); | |
253 | |
254 | |
255 // used by native wrappers to reenable yellow if overflow happened in native code | |
256 static void reguard_yellow_pages(); | |
257 | |
258 /** | |
259 * Fill in the "X cannot be cast to a Y" message for ClassCastException | |
260 * | |
261 * @param thr the current thread | |
262 * @param name the name of the class of the object attempted to be cast | |
263 * @return the dynamically allocated exception message (must be freed | |
264 * by the caller using a resource mark) | |
265 * | |
266 * BCP must refer to the current 'checkcast' opcode for the frame | |
267 * on top of the stack. | |
268 * The caller (or one of it's callers) must use a ResourceMark | |
269 * in order to correctly free the result. | |
270 */ | |
271 static char* generate_class_cast_message(JavaThread* thr, const char* name); | |
272 | |
273 /** | |
710 | 274 * Fill in the message for a WrongMethodTypeException |
275 * | |
276 * @param thr the current thread | |
277 * @param mtype (optional) expected method type (or argument class) | |
278 * @param mhandle (optional) actual method handle (or argument) | |
279 * @return the dynamically allocated exception message | |
280 * | |
281 * BCP for the frame on top of the stack must refer to an | |
282 * 'invokevirtual' op for a method handle, or an 'invokedyamic' op. | |
283 * The caller (or one of its callers) must use a ResourceMark | |
284 * in order to correctly free the result. | |
285 */ | |
286 static char* generate_wrong_method_type_message(JavaThread* thr, | |
287 oopDesc* mtype = NULL, | |
288 oopDesc* mhandle = NULL); | |
289 | |
290 /** Return non-null if the mtype is a klass or Class, not a MethodType. */ | |
291 static oop wrong_method_type_is_for_single_argument(JavaThread* thr, | |
292 oopDesc* mtype); | |
293 | |
294 /** | |
0 | 295 * Fill in the "X cannot be cast to a Y" message for ClassCastException |
296 * | |
297 * @param name the name of the class of the object attempted to be cast | |
298 * @param klass the name of the target klass attempt | |
710 | 299 * @param gripe the specific kind of problem being reported |
0 | 300 * @return the dynamically allocated exception message (must be freed |
301 * by the caller using a resource mark) | |
302 * | |
303 * This version does not require access the frame, so it can be called | |
304 * from interpreted code | |
305 * The caller (or one of it's callers) must use a ResourceMark | |
306 * in order to correctly free the result. | |
307 */ | |
710 | 308 static char* generate_class_cast_message(const char* name, const char* klass, |
309 const char* gripe = " cannot be cast to "); | |
0 | 310 |
311 // Resolves a call site- may patch in the destination of the call into the | |
312 // compiled code. | |
313 static methodHandle resolve_helper(JavaThread *thread, | |
314 bool is_virtual, | |
315 bool is_optimized, TRAPS); | |
316 | |
317 static void generate_stubs(void); | |
318 | |
319 private: | |
320 // deopt blob | |
321 static void generate_deopt_blob(void); | |
322 static DeoptimizationBlob* _deopt_blob; | |
323 | |
324 public: | |
325 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; } | |
326 | |
327 // Resets a call-site in compiled code so it will get resolved again. | |
328 static methodHandle reresolve_call_site(JavaThread *thread, TRAPS); | |
329 | |
330 // In the code prolog, if the klass comparison fails, the inline cache | |
331 // misses and the call site is patched to megamorphic | |
332 static methodHandle handle_ic_miss_helper(JavaThread* thread, TRAPS); | |
333 | |
334 // Find the method that called us. | |
335 static methodHandle find_callee_method(JavaThread* thread, TRAPS); | |
336 | |
337 | |
338 private: | |
339 static Handle find_callee_info(JavaThread* thread, | |
340 Bytecodes::Code& bc, | |
341 CallInfo& callinfo, TRAPS); | |
342 static Handle find_callee_info_helper(JavaThread* thread, | |
343 vframeStream& vfst, | |
344 Bytecodes::Code& bc, | |
345 CallInfo& callinfo, TRAPS); | |
346 | |
347 static address clean_virtual_call_entry(); | |
348 static address clean_opt_virtual_call_entry(); | |
349 static address clean_static_call_entry(); | |
350 | |
351 public: | |
352 | |
353 // Read the array of BasicTypes from a Java signature, and compute where | |
354 // compiled Java code would like to put the results. Values in reg_lo and | |
355 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are | |
356 // registers, those above refer to 4-byte stack slots. All stack slots are | |
357 // based off of the window top. SharedInfo::stack0 refers to the first usable | |
358 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word | |
359 // 4-bytes higher. So for sparc because the register window save area is at | |
360 // the bottom of the frame the first 16 words will be skipped and SharedInfo::stack0 | |
361 // will be just above it. ( | |
362 // return value is the maximum number of VMReg stack slots the convention will use. | |
363 static int java_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed, int is_outgoing); | |
364 | |
365 // Ditto except for calling C | |
366 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed); | |
367 | |
368 // Generate I2C and C2I adapters. These adapters are simple argument marshalling | |
369 // blobs. Unlike adapters in the tiger and earlier releases the code in these | |
370 // blobs does not create a new frame and are therefore virtually invisible | |
371 // to the stack walking code. In general these blobs extend the callers stack | |
372 // as needed for the conversion of argument locations. | |
373 | |
374 // When calling a c2i blob the code will always call the interpreter even if | |
375 // by the time we reach the blob there is compiled code available. This allows | |
376 // the blob to pass the incoming stack pointer (the sender sp) in a known | |
377 // location for the interpreter to record. This is used by the frame code | |
378 // to correct the sender code to match up with the stack pointer when the | |
379 // thread left the compiled code. In addition it allows the interpreter | |
380 // to remove the space the c2i adapter allocated to do it argument conversion. | |
381 | |
382 // Although a c2i blob will always run interpreted even if compiled code is | |
383 // present if we see that compiled code is present the compiled call site | |
384 // will be patched/re-resolved so that later calls will run compiled. | |
385 | |
386 // Aditionally a c2i blob need to have a unverified entry because it can be reached | |
387 // in situations where the call site is an inlined cache site and may go megamorphic. | |
388 | |
389 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed | |
390 // that the interpreter before it does any call dispatch will record the current | |
391 // stack pointer in the interpreter frame. On return it will restore the stack | |
392 // pointer as needed. This means the i2c adapter code doesn't need any special | |
393 // handshaking path with compiled code to keep the stack walking correct. | |
394 | |
395 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *_masm, | |
396 int total_args_passed, | |
397 int max_arg, | |
398 const BasicType *sig_bt, | |
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399 const VMRegPair *regs, |
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400 AdapterFingerPrint* fingerprint); |
0 | 401 |
402 // OSR support | |
403 | |
404 // OSR_migration_begin will extract the jvm state from an interpreter | |
405 // frame (locals, monitors) and store the data in a piece of C heap | |
406 // storage. This then allows the interpreter frame to be removed from the | |
407 // stack and the OSR nmethod to be called. That method is called with a | |
408 // pointer to the C heap storage. This pointer is the return value from | |
409 // OSR_migration_begin. | |
410 | |
411 static intptr_t* OSR_migration_begin( JavaThread *thread); | |
412 | |
413 // OSR_migration_end is a trivial routine. It is called after the compiled | |
414 // method has extracted the jvm state from the C heap that OSR_migration_begin | |
415 // created. It's entire job is to simply free this storage. | |
416 static void OSR_migration_end ( intptr_t* buf); | |
417 | |
418 // Convert a sig into a calling convention register layout | |
419 // and find interesting things about it. | |
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420 static VMRegPair* find_callee_arguments(Symbol* sig, bool has_receiver, int *arg_size); |
0 | 421 static VMReg name_for_receiver(); |
422 | |
423 // "Top of Stack" slots that may be unused by the calling convention but must | |
424 // otherwise be preserved. | |
425 // On Intel these are not necessary and the value can be zero. | |
426 // On Sparc this describes the words reserved for storing a register window | |
427 // when an interrupt occurs. | |
428 static uint out_preserve_stack_slots(); | |
429 | |
430 // Save and restore a native result | |
431 static void save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots ); | |
432 static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots ); | |
433 | |
434 // Generate a native wrapper for a given method. The method takes arguments | |
435 // in the Java compiled code convention, marshals them to the native | |
436 // convention (handlizes oops, etc), transitions to native, makes the call, | |
437 // returns to java state (possibly blocking), unhandlizes any result and | |
438 // returns. | |
439 static nmethod *generate_native_wrapper(MacroAssembler* masm, | |
440 methodHandle method, | |
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441 int compile_id, |
0 | 442 int total_args_passed, |
443 int max_arg, | |
444 BasicType *sig_bt, | |
445 VMRegPair *regs, | |
446 BasicType ret_type ); | |
447 | |
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448 #ifdef HAVE_DTRACE_H |
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449 // Generate a dtrace wrapper for a given method. The method takes arguments |
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450 // in the Java compiled code convention, marshals them to the native |
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451 // convention (handlizes oops, etc), transitions to native, makes the call, |
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452 // returns to java state (possibly blocking), unhandlizes any result and |
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453 // returns. |
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454 static nmethod *generate_dtrace_nmethod(MacroAssembler* masm, |
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455 methodHandle method); |
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456 |
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457 // dtrace support to convert a Java string to utf8 |
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458 static void get_utf(oopDesc* src, address dst); |
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459 #endif // def HAVE_DTRACE_H |
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460 |
0 | 461 // A compiled caller has just called the interpreter, but compiled code |
462 // exists. Patch the caller so he no longer calls into the interpreter. | |
463 static void fixup_callers_callsite(methodOopDesc* moop, address ret_pc); | |
464 | |
465 // Slow-path Locking and Unlocking | |
466 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* thread); | |
467 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock); | |
468 | |
469 // Resolving of calls | |
470 static address resolve_static_call_C (JavaThread *thread); | |
471 static address resolve_virtual_call_C (JavaThread *thread); | |
472 static address resolve_opt_virtual_call_C(JavaThread *thread); | |
473 | |
474 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.) | |
475 static void slow_arraycopy_C(oopDesc* src, jint src_pos, | |
476 oopDesc* dest, jint dest_pos, | |
477 jint length, JavaThread* thread); | |
478 | |
479 // handle ic miss with caller being compiled code | |
480 // wrong method handling (inline cache misses, zombie methods) | |
481 static address handle_wrong_method(JavaThread* thread); | |
482 static address handle_wrong_method_ic_miss(JavaThread* thread); | |
483 | |
484 #ifndef PRODUCT | |
485 | |
486 // Collect and print inline cache miss statistics | |
487 private: | |
488 enum { maxICmiss_count = 100 }; | |
489 static int _ICmiss_index; // length of IC miss histogram | |
490 static int _ICmiss_count[maxICmiss_count]; // miss counts | |
491 static address _ICmiss_at[maxICmiss_count]; // miss addresses | |
492 static void trace_ic_miss(address at); | |
493 | |
494 public: | |
495 static int _monitor_enter_ctr; // monitor enter slow | |
496 static int _monitor_exit_ctr; // monitor exit slow | |
497 static int _throw_null_ctr; // throwing a null-pointer exception | |
498 static int _ic_miss_ctr; // total # of IC misses | |
499 static int _wrong_method_ctr; | |
500 static int _resolve_static_ctr; | |
501 static int _resolve_virtual_ctr; | |
502 static int _resolve_opt_virtual_ctr; | |
503 static int _implicit_null_throws; | |
504 static int _implicit_div0_throws; | |
505 | |
506 static int _jbyte_array_copy_ctr; // Slow-path byte array copy | |
507 static int _jshort_array_copy_ctr; // Slow-path short array copy | |
508 static int _jint_array_copy_ctr; // Slow-path int array copy | |
509 static int _jlong_array_copy_ctr; // Slow-path long array copy | |
510 static int _oop_array_copy_ctr; // Slow-path oop array copy | |
511 static int _checkcast_array_copy_ctr; // Slow-path oop array copy, with cast | |
512 static int _unsafe_array_copy_ctr; // Slow-path includes alignment checks | |
513 static int _generic_array_copy_ctr; // Slow-path includes type decoding | |
514 static int _slow_array_copy_ctr; // Slow-path failed out to a method call | |
515 | |
516 static int _new_instance_ctr; // 'new' object requires GC | |
517 static int _new_array_ctr; // 'new' array requires GC | |
518 static int _multi1_ctr, _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr; | |
519 static int _find_handler_ctr; // find exception handler | |
520 static int _rethrow_ctr; // rethrow exception | |
521 static int _mon_enter_stub_ctr; // monitor enter stub | |
522 static int _mon_exit_stub_ctr; // monitor exit stub | |
523 static int _mon_enter_ctr; // monitor enter slow | |
524 static int _mon_exit_ctr; // monitor exit slow | |
525 static int _partial_subtype_ctr; // SubRoutines::partial_subtype_check | |
526 | |
527 // Statistics code | |
528 // stats for "normal" compiled calls (non-interface) | |
529 static int _nof_normal_calls; // total # of calls | |
530 static int _nof_optimized_calls; // total # of statically-bound calls | |
531 static int _nof_inlined_calls; // total # of inlined normal calls | |
532 static int _nof_static_calls; // total # of calls to static methods or super methods (invokespecial) | |
533 static int _nof_inlined_static_calls; // total # of inlined static calls | |
534 // stats for compiled interface calls | |
535 static int _nof_interface_calls; // total # of compiled calls | |
536 static int _nof_optimized_interface_calls; // total # of statically-bound interface calls | |
537 static int _nof_inlined_interface_calls; // total # of inlined interface calls | |
538 static int _nof_megamorphic_interface_calls;// total # of megamorphic interface calls | |
539 // stats for runtime exceptions | |
540 static int _nof_removable_exceptions; // total # of exceptions that could be replaced by branches due to inlining | |
541 | |
542 public: // for compiler | |
543 static address nof_normal_calls_addr() { return (address)&_nof_normal_calls; } | |
544 static address nof_optimized_calls_addr() { return (address)&_nof_optimized_calls; } | |
545 static address nof_inlined_calls_addr() { return (address)&_nof_inlined_calls; } | |
546 static address nof_static_calls_addr() { return (address)&_nof_static_calls; } | |
547 static address nof_inlined_static_calls_addr() { return (address)&_nof_inlined_static_calls; } | |
548 static address nof_interface_calls_addr() { return (address)&_nof_interface_calls; } | |
549 static address nof_optimized_interface_calls_addr() { return (address)&_nof_optimized_interface_calls; } | |
550 static address nof_inlined_interface_calls_addr() { return (address)&_nof_inlined_interface_calls; } | |
551 static address nof_megamorphic_interface_calls_addr() { return (address)&_nof_megamorphic_interface_calls; } | |
552 static void print_call_statistics(int comp_total); | |
553 static void print_statistics(); | |
554 static void print_ic_miss_histogram(); | |
555 | |
556 #endif // PRODUCT | |
557 }; | |
558 | |
559 | |
560 // --------------------------------------------------------------------------- | |
561 // Implementation of AdapterHandlerLibrary | |
562 // | |
563 // This library manages argument marshaling adapters and native wrappers. | |
564 // There are 2 flavors of adapters: I2C and C2I. | |
565 // | |
1748 | 566 // The I2C flavor takes a stock interpreted call setup, marshals the |
567 // arguments for a Java-compiled call, and jumps to Rmethod-> code()-> | |
568 // code_begin(). It is broken to call it without an nmethod assigned. | |
569 // The usual behavior is to lift any register arguments up out of the | |
570 // stack and possibly re-pack the extra arguments to be contigious. | |
571 // I2C adapters will save what the interpreter's stack pointer will be | |
572 // after arguments are popped, then adjust the interpreter's frame | |
573 // size to force alignment and possibly to repack the arguments. | |
574 // After re-packing, it jumps to the compiled code start. There are | |
575 // no safepoints in this adapter code and a GC cannot happen while | |
576 // marshaling is in progress. | |
0 | 577 // |
578 // The C2I flavor takes a stock compiled call setup plus the target method in | |
579 // Rmethod, marshals the arguments for an interpreted call and jumps to | |
580 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been | |
581 // setup. Compiled frames are fixed-size and the args are likely not in the | |
582 // right place. Hence all the args will likely be copied into the | |
583 // interpreter's frame, forcing that frame to grow. The compiled frame's | |
584 // outgoing stack args will be dead after the copy. | |
585 // | |
586 // Native wrappers, like adapters, marshal arguments. Unlike adapters they | |
587 // also perform an offical frame push & pop. They have a call to the native | |
588 // routine in their middles and end in a return (instead of ending in a jump). | |
589 // The native wrappers are stored in real nmethods instead of the BufferBlobs | |
590 // used by the adapters. The code generation happens here because it's very | |
591 // similar to what the adapters have to do. | |
592 | |
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593 class AdapterHandlerEntry : public BasicHashtableEntry { |
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594 friend class AdapterHandlerTable; |
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595 |
0 | 596 private: |
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597 AdapterFingerPrint* _fingerprint; |
0 | 598 address _i2c_entry; |
599 address _c2i_entry; | |
600 address _c2i_unverified_entry; | |
601 | |
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602 #ifdef ASSERT |
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603 // Captures code and signature used to generate this adapter when |
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604 // verifing adapter equivalence. |
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605 unsigned char* _saved_code; |
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606 int _code_length; |
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607 BasicType* _saved_sig; |
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608 int _total_args_passed; |
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609 #endif |
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610 |
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611 void init(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_unverified_entry) { |
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612 _fingerprint = fingerprint; |
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613 _i2c_entry = i2c_entry; |
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614 _c2i_entry = c2i_entry; |
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615 _c2i_unverified_entry = c2i_unverified_entry; |
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616 #ifdef ASSERT |
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617 _saved_code = NULL; |
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618 _code_length = 0; |
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619 _saved_sig = NULL; |
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620 _total_args_passed = 0; |
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621 #endif |
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622 } |
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623 |
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624 void deallocate(); |
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625 |
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626 // should never be used |
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627 AdapterHandlerEntry(); |
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628 |
0 | 629 public: |
630 address get_i2c_entry() { return _i2c_entry; } | |
631 address get_c2i_entry() { return _c2i_entry; } | |
632 address get_c2i_unverified_entry() { return _c2i_unverified_entry; } | |
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633 |
0 | 634 void relocate(address new_base); |
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635 |
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636 AdapterFingerPrint* fingerprint() { return _fingerprint; } |
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637 |
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638 AdapterHandlerEntry* next() { |
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639 return (AdapterHandlerEntry*)BasicHashtableEntry::next(); |
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640 } |
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641 |
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642 #ifdef ASSERT |
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643 // Used to verify that code generated for shared adapters is equivalent |
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644 void save_code(unsigned char* code, int length, int total_args_passed, BasicType* sig_bt); |
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645 bool compare_code(unsigned char* code, int length, int total_args_passed, BasicType* sig_bt); |
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646 #endif |
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647 |
0 | 648 void print(); |
649 }; | |
650 | |
651 class AdapterHandlerLibrary: public AllStatic { | |
652 private: | |
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653 static BufferBlob* _buffer; // the temporary code buffer in CodeCache |
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654 static AdapterHandlerTable* _adapters; |
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655 static AdapterHandlerEntry* _abstract_method_handler; |
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656 static BufferBlob* buffer_blob(); |
0 | 657 static void initialize(); |
658 | |
659 public: | |
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660 |
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661 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint, |
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662 address i2c_entry, address c2i_entry, address c2i_unverified_entry); |
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663 static nmethod* create_native_wrapper(methodHandle method, int compile_id); |
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664 static AdapterHandlerEntry* get_adapter(methodHandle method); |
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665 |
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666 #ifdef HAVE_DTRACE_H |
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667 static nmethod* create_dtrace_nmethod (methodHandle method); |
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668 #endif // HAVE_DTRACE_H |
0 | 669 |
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670 static void print_handler(CodeBlob* b) { print_handler_on(tty, b); } |
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671 static void print_handler_on(outputStream* st, CodeBlob* b); |
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672 static bool contains(CodeBlob* b); |
0 | 673 #ifndef PRODUCT |
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674 static void print_statistics(); |
0 | 675 #endif /* PRODUCT */ |
676 | |
677 }; | |
1972 | 678 |
679 #endif // SHARE_VM_RUNTIME_SHAREDRUNTIME_HPP |