Mercurial > hg > graal-jvmci-8
annotate src/share/vm/runtime/sharedRuntime.cpp @ 1506:2338d41fbd81
6943304: remove tagged stack interpreter
Reviewed-by: coleenp, never, gbenson
author | twisti |
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date | Fri, 30 Apr 2010 08:37:24 -0700 |
parents | 9f5b60a14736 |
children | cd5dbf694d45 |
rev | line source |
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0 | 1 /* |
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2 * Copyright 1997-2010 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 #include "incls/_precompiled.incl" | |
26 #include "incls/_sharedRuntime.cpp.incl" | |
27 #include <math.h> | |
28 | |
29 HS_DTRACE_PROBE_DECL4(hotspot, object__alloc, Thread*, char*, int, size_t); | |
30 HS_DTRACE_PROBE_DECL7(hotspot, method__entry, int, | |
31 char*, int, char*, int, char*, int); | |
32 HS_DTRACE_PROBE_DECL7(hotspot, method__return, int, | |
33 char*, int, char*, int, char*, int); | |
34 | |
35 // Implementation of SharedRuntime | |
36 | |
37 #ifndef PRODUCT | |
38 // For statistics | |
39 int SharedRuntime::_ic_miss_ctr = 0; | |
40 int SharedRuntime::_wrong_method_ctr = 0; | |
41 int SharedRuntime::_resolve_static_ctr = 0; | |
42 int SharedRuntime::_resolve_virtual_ctr = 0; | |
43 int SharedRuntime::_resolve_opt_virtual_ctr = 0; | |
44 int SharedRuntime::_implicit_null_throws = 0; | |
45 int SharedRuntime::_implicit_div0_throws = 0; | |
46 int SharedRuntime::_throw_null_ctr = 0; | |
47 | |
48 int SharedRuntime::_nof_normal_calls = 0; | |
49 int SharedRuntime::_nof_optimized_calls = 0; | |
50 int SharedRuntime::_nof_inlined_calls = 0; | |
51 int SharedRuntime::_nof_megamorphic_calls = 0; | |
52 int SharedRuntime::_nof_static_calls = 0; | |
53 int SharedRuntime::_nof_inlined_static_calls = 0; | |
54 int SharedRuntime::_nof_interface_calls = 0; | |
55 int SharedRuntime::_nof_optimized_interface_calls = 0; | |
56 int SharedRuntime::_nof_inlined_interface_calls = 0; | |
57 int SharedRuntime::_nof_megamorphic_interface_calls = 0; | |
58 int SharedRuntime::_nof_removable_exceptions = 0; | |
59 | |
60 int SharedRuntime::_new_instance_ctr=0; | |
61 int SharedRuntime::_new_array_ctr=0; | |
62 int SharedRuntime::_multi1_ctr=0; | |
63 int SharedRuntime::_multi2_ctr=0; | |
64 int SharedRuntime::_multi3_ctr=0; | |
65 int SharedRuntime::_multi4_ctr=0; | |
66 int SharedRuntime::_multi5_ctr=0; | |
67 int SharedRuntime::_mon_enter_stub_ctr=0; | |
68 int SharedRuntime::_mon_exit_stub_ctr=0; | |
69 int SharedRuntime::_mon_enter_ctr=0; | |
70 int SharedRuntime::_mon_exit_ctr=0; | |
71 int SharedRuntime::_partial_subtype_ctr=0; | |
72 int SharedRuntime::_jbyte_array_copy_ctr=0; | |
73 int SharedRuntime::_jshort_array_copy_ctr=0; | |
74 int SharedRuntime::_jint_array_copy_ctr=0; | |
75 int SharedRuntime::_jlong_array_copy_ctr=0; | |
76 int SharedRuntime::_oop_array_copy_ctr=0; | |
77 int SharedRuntime::_checkcast_array_copy_ctr=0; | |
78 int SharedRuntime::_unsafe_array_copy_ctr=0; | |
79 int SharedRuntime::_generic_array_copy_ctr=0; | |
80 int SharedRuntime::_slow_array_copy_ctr=0; | |
81 int SharedRuntime::_find_handler_ctr=0; | |
82 int SharedRuntime::_rethrow_ctr=0; | |
83 | |
84 int SharedRuntime::_ICmiss_index = 0; | |
85 int SharedRuntime::_ICmiss_count[SharedRuntime::maxICmiss_count]; | |
86 address SharedRuntime::_ICmiss_at[SharedRuntime::maxICmiss_count]; | |
87 | |
88 void SharedRuntime::trace_ic_miss(address at) { | |
89 for (int i = 0; i < _ICmiss_index; i++) { | |
90 if (_ICmiss_at[i] == at) { | |
91 _ICmiss_count[i]++; | |
92 return; | |
93 } | |
94 } | |
95 int index = _ICmiss_index++; | |
96 if (_ICmiss_index >= maxICmiss_count) _ICmiss_index = maxICmiss_count - 1; | |
97 _ICmiss_at[index] = at; | |
98 _ICmiss_count[index] = 1; | |
99 } | |
100 | |
101 void SharedRuntime::print_ic_miss_histogram() { | |
102 if (ICMissHistogram) { | |
103 tty->print_cr ("IC Miss Histogram:"); | |
104 int tot_misses = 0; | |
105 for (int i = 0; i < _ICmiss_index; i++) { | |
106 tty->print_cr(" at: " INTPTR_FORMAT " nof: %d", _ICmiss_at[i], _ICmiss_count[i]); | |
107 tot_misses += _ICmiss_count[i]; | |
108 } | |
109 tty->print_cr ("Total IC misses: %7d", tot_misses); | |
110 } | |
111 } | |
112 #endif // PRODUCT | |
113 | |
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114 #ifndef SERIALGC |
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115 |
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116 // G1 write-barrier pre: executed before a pointer store. |
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117 JRT_LEAF(void, SharedRuntime::g1_wb_pre(oopDesc* orig, JavaThread *thread)) |
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118 if (orig == NULL) { |
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119 assert(false, "should be optimized out"); |
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120 return; |
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121 } |
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122 assert(orig->is_oop(true /* ignore mark word */), "Error"); |
342
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123 // store the original value that was in the field reference |
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124 thread->satb_mark_queue().enqueue(orig); |
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125 JRT_END |
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126 |
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127 // G1 write-barrier post: executed after a pointer store. |
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128 JRT_LEAF(void, SharedRuntime::g1_wb_post(void* card_addr, JavaThread* thread)) |
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129 thread->dirty_card_queue().enqueue(card_addr); |
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130 JRT_END |
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131 |
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132 #endif // !SERIALGC |
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133 |
0 | 134 |
135 JRT_LEAF(jlong, SharedRuntime::lmul(jlong y, jlong x)) | |
136 return x * y; | |
137 JRT_END | |
138 | |
139 | |
140 JRT_LEAF(jlong, SharedRuntime::ldiv(jlong y, jlong x)) | |
141 if (x == min_jlong && y == CONST64(-1)) { | |
142 return x; | |
143 } else { | |
144 return x / y; | |
145 } | |
146 JRT_END | |
147 | |
148 | |
149 JRT_LEAF(jlong, SharedRuntime::lrem(jlong y, jlong x)) | |
150 if (x == min_jlong && y == CONST64(-1)) { | |
151 return 0; | |
152 } else { | |
153 return x % y; | |
154 } | |
155 JRT_END | |
156 | |
157 | |
158 const juint float_sign_mask = 0x7FFFFFFF; | |
159 const juint float_infinity = 0x7F800000; | |
160 const julong double_sign_mask = CONST64(0x7FFFFFFFFFFFFFFF); | |
161 const julong double_infinity = CONST64(0x7FF0000000000000); | |
162 | |
163 JRT_LEAF(jfloat, SharedRuntime::frem(jfloat x, jfloat y)) | |
164 #ifdef _WIN64 | |
165 // 64-bit Windows on amd64 returns the wrong values for | |
166 // infinity operands. | |
167 union { jfloat f; juint i; } xbits, ybits; | |
168 xbits.f = x; | |
169 ybits.f = y; | |
170 // x Mod Infinity == x unless x is infinity | |
171 if ( ((xbits.i & float_sign_mask) != float_infinity) && | |
172 ((ybits.i & float_sign_mask) == float_infinity) ) { | |
173 return x; | |
174 } | |
175 #endif | |
176 return ((jfloat)fmod((double)x,(double)y)); | |
177 JRT_END | |
178 | |
179 | |
180 JRT_LEAF(jdouble, SharedRuntime::drem(jdouble x, jdouble y)) | |
181 #ifdef _WIN64 | |
182 union { jdouble d; julong l; } xbits, ybits; | |
183 xbits.d = x; | |
184 ybits.d = y; | |
185 // x Mod Infinity == x unless x is infinity | |
186 if ( ((xbits.l & double_sign_mask) != double_infinity) && | |
187 ((ybits.l & double_sign_mask) == double_infinity) ) { | |
188 return x; | |
189 } | |
190 #endif | |
191 return ((jdouble)fmod((double)x,(double)y)); | |
192 JRT_END | |
193 | |
194 | |
195 JRT_LEAF(jint, SharedRuntime::f2i(jfloat x)) | |
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196 if (g_isnan(x)) |
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197 return 0; |
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198 if (x >= (jfloat) max_jint) |
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199 return max_jint; |
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200 if (x <= (jfloat) min_jint) |
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201 return min_jint; |
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202 return (jint) x; |
0 | 203 JRT_END |
204 | |
205 | |
206 JRT_LEAF(jlong, SharedRuntime::f2l(jfloat x)) | |
508
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207 if (g_isnan(x)) |
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208 return 0; |
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209 if (x >= (jfloat) max_jlong) |
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210 return max_jlong; |
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211 if (x <= (jfloat) min_jlong) |
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212 return min_jlong; |
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213 return (jlong) x; |
0 | 214 JRT_END |
215 | |
216 | |
217 JRT_LEAF(jint, SharedRuntime::d2i(jdouble x)) | |
508
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218 if (g_isnan(x)) |
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219 return 0; |
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220 if (x >= (jdouble) max_jint) |
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221 return max_jint; |
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222 if (x <= (jdouble) min_jint) |
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223 return min_jint; |
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224 return (jint) x; |
0 | 225 JRT_END |
226 | |
227 | |
228 JRT_LEAF(jlong, SharedRuntime::d2l(jdouble x)) | |
508
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229 if (g_isnan(x)) |
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230 return 0; |
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231 if (x >= (jdouble) max_jlong) |
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232 return max_jlong; |
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233 if (x <= (jdouble) min_jlong) |
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234 return min_jlong; |
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235 return (jlong) x; |
0 | 236 JRT_END |
237 | |
238 | |
239 JRT_LEAF(jfloat, SharedRuntime::d2f(jdouble x)) | |
240 return (jfloat)x; | |
241 JRT_END | |
242 | |
243 | |
244 JRT_LEAF(jfloat, SharedRuntime::l2f(jlong x)) | |
245 return (jfloat)x; | |
246 JRT_END | |
247 | |
248 | |
249 JRT_LEAF(jdouble, SharedRuntime::l2d(jlong x)) | |
250 return (jdouble)x; | |
251 JRT_END | |
252 | |
253 // Exception handling accross interpreter/compiler boundaries | |
254 // | |
255 // exception_handler_for_return_address(...) returns the continuation address. | |
256 // The continuation address is the entry point of the exception handler of the | |
257 // previous frame depending on the return address. | |
258 | |
1295 | 259 address SharedRuntime::raw_exception_handler_for_return_address(JavaThread* thread, address return_address) { |
0 | 260 assert(frame::verify_return_pc(return_address), "must be a return pc"); |
261 | |
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262 // Reset MethodHandle flag. |
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263 thread->set_is_method_handle_return(false); |
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264 |
0 | 265 // the fastest case first |
266 CodeBlob* blob = CodeCache::find_blob(return_address); | |
267 if (blob != NULL && blob->is_nmethod()) { | |
268 nmethod* code = (nmethod*)blob; | |
269 assert(code != NULL, "nmethod must be present"); | |
1295 | 270 // Check if the return address is a MethodHandle call site. |
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271 thread->set_is_method_handle_return(code->is_method_handle_return(return_address)); |
0 | 272 // native nmethods don't have exception handlers |
273 assert(!code->is_native_method(), "no exception handler"); | |
274 assert(code->header_begin() != code->exception_begin(), "no exception handler"); | |
275 if (code->is_deopt_pc(return_address)) { | |
276 return SharedRuntime::deopt_blob()->unpack_with_exception(); | |
277 } else { | |
278 return code->exception_begin(); | |
279 } | |
280 } | |
281 | |
282 // Entry code | |
283 if (StubRoutines::returns_to_call_stub(return_address)) { | |
284 return StubRoutines::catch_exception_entry(); | |
285 } | |
286 // Interpreted code | |
287 if (Interpreter::contains(return_address)) { | |
288 return Interpreter::rethrow_exception_entry(); | |
289 } | |
290 | |
291 // Compiled code | |
292 if (CodeCache::contains(return_address)) { | |
293 CodeBlob* blob = CodeCache::find_blob(return_address); | |
294 if (blob->is_nmethod()) { | |
295 nmethod* code = (nmethod*)blob; | |
296 assert(code != NULL, "nmethod must be present"); | |
1295 | 297 // Check if the return address is a MethodHandle call site. |
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298 thread->set_is_method_handle_return(code->is_method_handle_return(return_address)); |
0 | 299 assert(code->header_begin() != code->exception_begin(), "no exception handler"); |
300 return code->exception_begin(); | |
301 } | |
302 if (blob->is_runtime_stub()) { | |
303 ShouldNotReachHere(); // callers are responsible for skipping runtime stub frames | |
304 } | |
305 } | |
306 guarantee(!VtableStubs::contains(return_address), "NULL exceptions in vtables should have been handled already!"); | |
307 #ifndef PRODUCT | |
308 { ResourceMark rm; | |
309 tty->print_cr("No exception handler found for exception at " INTPTR_FORMAT " - potential problems:", return_address); | |
310 tty->print_cr("a) exception happened in (new?) code stubs/buffers that is not handled here"); | |
311 tty->print_cr("b) other problem"); | |
312 } | |
313 #endif // PRODUCT | |
314 ShouldNotReachHere(); | |
315 return NULL; | |
316 } | |
317 | |
318 | |
1295 | 319 JRT_LEAF(address, SharedRuntime::exception_handler_for_return_address(JavaThread* thread, address return_address)) |
320 return raw_exception_handler_for_return_address(thread, return_address); | |
0 | 321 JRT_END |
322 | |
1295 | 323 |
0 | 324 address SharedRuntime::get_poll_stub(address pc) { |
325 address stub; | |
326 // Look up the code blob | |
327 CodeBlob *cb = CodeCache::find_blob(pc); | |
328 | |
329 // Should be an nmethod | |
330 assert( cb && cb->is_nmethod(), "safepoint polling: pc must refer to an nmethod" ); | |
331 | |
332 // Look up the relocation information | |
333 assert( ((nmethod*)cb)->is_at_poll_or_poll_return(pc), | |
334 "safepoint polling: type must be poll" ); | |
335 | |
336 assert( ((NativeInstruction*)pc)->is_safepoint_poll(), | |
337 "Only polling locations are used for safepoint"); | |
338 | |
339 bool at_poll_return = ((nmethod*)cb)->is_at_poll_return(pc); | |
340 if (at_poll_return) { | |
341 assert(SharedRuntime::polling_page_return_handler_blob() != NULL, | |
342 "polling page return stub not created yet"); | |
343 stub = SharedRuntime::polling_page_return_handler_blob()->instructions_begin(); | |
344 } else { | |
345 assert(SharedRuntime::polling_page_safepoint_handler_blob() != NULL, | |
346 "polling page safepoint stub not created yet"); | |
347 stub = SharedRuntime::polling_page_safepoint_handler_blob()->instructions_begin(); | |
348 } | |
349 #ifndef PRODUCT | |
350 if( TraceSafepoint ) { | |
351 char buf[256]; | |
352 jio_snprintf(buf, sizeof(buf), | |
353 "... found polling page %s exception at pc = " | |
354 INTPTR_FORMAT ", stub =" INTPTR_FORMAT, | |
355 at_poll_return ? "return" : "loop", | |
356 (intptr_t)pc, (intptr_t)stub); | |
357 tty->print_raw_cr(buf); | |
358 } | |
359 #endif // PRODUCT | |
360 return stub; | |
361 } | |
362 | |
363 | |
364 oop SharedRuntime::retrieve_receiver( symbolHandle sig, frame caller ) { | |
365 assert(caller.is_interpreted_frame(), ""); | |
366 int args_size = ArgumentSizeComputer(sig).size() + 1; | |
367 assert(args_size <= caller.interpreter_frame_expression_stack_size(), "receiver must be on interpreter stack"); | |
368 oop result = (oop) *caller.interpreter_frame_tos_at(args_size - 1); | |
369 assert(Universe::heap()->is_in(result) && result->is_oop(), "receiver must be an oop"); | |
370 return result; | |
371 } | |
372 | |
373 | |
374 void SharedRuntime::throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception) { | |
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375 if (JvmtiExport::can_post_on_exceptions()) { |
0 | 376 vframeStream vfst(thread, true); |
377 methodHandle method = methodHandle(thread, vfst.method()); | |
378 address bcp = method()->bcp_from(vfst.bci()); | |
379 JvmtiExport::post_exception_throw(thread, method(), bcp, h_exception()); | |
380 } | |
381 Exceptions::_throw(thread, __FILE__, __LINE__, h_exception); | |
382 } | |
383 | |
384 void SharedRuntime::throw_and_post_jvmti_exception(JavaThread *thread, symbolOop name, const char *message) { | |
385 Handle h_exception = Exceptions::new_exception(thread, name, message); | |
386 throw_and_post_jvmti_exception(thread, h_exception); | |
387 } | |
388 | |
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389 // The interpreter code to call this tracing function is only |
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390 // called/generated when TraceRedefineClasses has the right bits |
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391 // set. Since obsolete methods are never compiled, we don't have |
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392 // to modify the compilers to generate calls to this function. |
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393 // |
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394 JRT_LEAF(int, SharedRuntime::rc_trace_method_entry( |
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395 JavaThread* thread, methodOopDesc* method)) |
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396 assert(RC_TRACE_IN_RANGE(0x00001000, 0x00002000), "wrong call"); |
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397 |
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398 if (method->is_obsolete()) { |
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399 // We are calling an obsolete method, but this is not necessarily |
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400 // an error. Our method could have been redefined just after we |
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401 // fetched the methodOop from the constant pool. |
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402 |
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403 // RC_TRACE macro has an embedded ResourceMark |
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404 RC_TRACE_WITH_THREAD(0x00001000, thread, |
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405 ("calling obsolete method '%s'", |
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406 method->name_and_sig_as_C_string())); |
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407 if (RC_TRACE_ENABLED(0x00002000)) { |
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408 // this option is provided to debug calls to obsolete methods |
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409 guarantee(false, "faulting at call to an obsolete method."); |
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410 } |
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411 } |
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412 return 0; |
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413 JRT_END |
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414 |
0 | 415 // ret_pc points into caller; we are returning caller's exception handler |
416 // for given exception | |
417 address SharedRuntime::compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception, | |
418 bool force_unwind, bool top_frame_only) { | |
419 assert(nm != NULL, "must exist"); | |
420 ResourceMark rm; | |
421 | |
422 ScopeDesc* sd = nm->scope_desc_at(ret_pc); | |
423 // determine handler bci, if any | |
424 EXCEPTION_MARK; | |
425 | |
426 int handler_bci = -1; | |
427 int scope_depth = 0; | |
428 if (!force_unwind) { | |
429 int bci = sd->bci(); | |
430 do { | |
431 bool skip_scope_increment = false; | |
432 // exception handler lookup | |
433 KlassHandle ek (THREAD, exception->klass()); | |
434 handler_bci = sd->method()->fast_exception_handler_bci_for(ek, bci, THREAD); | |
435 if (HAS_PENDING_EXCEPTION) { | |
436 // We threw an exception while trying to find the exception handler. | |
437 // Transfer the new exception to the exception handle which will | |
438 // be set into thread local storage, and do another lookup for an | |
439 // exception handler for this exception, this time starting at the | |
440 // BCI of the exception handler which caused the exception to be | |
441 // thrown (bugs 4307310 and 4546590). Set "exception" reference | |
442 // argument to ensure that the correct exception is thrown (4870175). | |
443 exception = Handle(THREAD, PENDING_EXCEPTION); | |
444 CLEAR_PENDING_EXCEPTION; | |
445 if (handler_bci >= 0) { | |
446 bci = handler_bci; | |
447 handler_bci = -1; | |
448 skip_scope_increment = true; | |
449 } | |
450 } | |
451 if (!top_frame_only && handler_bci < 0 && !skip_scope_increment) { | |
452 sd = sd->sender(); | |
453 if (sd != NULL) { | |
454 bci = sd->bci(); | |
455 } | |
456 ++scope_depth; | |
457 } | |
458 } while (!top_frame_only && handler_bci < 0 && sd != NULL); | |
459 } | |
460 | |
461 // found handling method => lookup exception handler | |
462 int catch_pco = ret_pc - nm->instructions_begin(); | |
463 | |
464 ExceptionHandlerTable table(nm); | |
465 HandlerTableEntry *t = table.entry_for(catch_pco, handler_bci, scope_depth); | |
466 if (t == NULL && (nm->is_compiled_by_c1() || handler_bci != -1)) { | |
467 // Allow abbreviated catch tables. The idea is to allow a method | |
468 // to materialize its exceptions without committing to the exact | |
469 // routing of exceptions. In particular this is needed for adding | |
470 // a synthethic handler to unlock monitors when inlining | |
471 // synchonized methods since the unlock path isn't represented in | |
472 // the bytecodes. | |
473 t = table.entry_for(catch_pco, -1, 0); | |
474 } | |
475 | |
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476 #ifdef COMPILER1 |
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477 if (t == NULL && nm->is_compiled_by_c1()) { |
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478 assert(nm->unwind_handler_begin() != NULL, ""); |
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479 return nm->unwind_handler_begin(); |
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480 } |
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481 #endif |
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482 |
0 | 483 if (t == NULL) { |
484 tty->print_cr("MISSING EXCEPTION HANDLER for pc " INTPTR_FORMAT " and handler bci %d", ret_pc, handler_bci); | |
485 tty->print_cr(" Exception:"); | |
486 exception->print(); | |
487 tty->cr(); | |
488 tty->print_cr(" Compiled exception table :"); | |
489 table.print(); | |
490 nm->print_code(); | |
491 guarantee(false, "missing exception handler"); | |
492 return NULL; | |
493 } | |
494 | |
495 return nm->instructions_begin() + t->pco(); | |
496 } | |
497 | |
498 JRT_ENTRY(void, SharedRuntime::throw_AbstractMethodError(JavaThread* thread)) | |
499 // These errors occur only at call sites | |
500 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_AbstractMethodError()); | |
501 JRT_END | |
502 | |
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503 JRT_ENTRY(void, SharedRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) |
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504 // These errors occur only at call sites |
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505 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_IncompatibleClassChangeError(), "vtable stub"); |
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506 JRT_END |
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507 |
0 | 508 JRT_ENTRY(void, SharedRuntime::throw_ArithmeticException(JavaThread* thread)) |
509 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_ArithmeticException(), "/ by zero"); | |
510 JRT_END | |
511 | |
512 JRT_ENTRY(void, SharedRuntime::throw_NullPointerException(JavaThread* thread)) | |
513 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_NullPointerException()); | |
514 JRT_END | |
515 | |
516 JRT_ENTRY(void, SharedRuntime::throw_NullPointerException_at_call(JavaThread* thread)) | |
517 // This entry point is effectively only used for NullPointerExceptions which occur at inline | |
518 // cache sites (when the callee activation is not yet set up) so we are at a call site | |
519 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_NullPointerException()); | |
520 JRT_END | |
521 | |
522 JRT_ENTRY(void, SharedRuntime::throw_StackOverflowError(JavaThread* thread)) | |
523 // We avoid using the normal exception construction in this case because | |
524 // it performs an upcall to Java, and we're already out of stack space. | |
525 klassOop k = SystemDictionary::StackOverflowError_klass(); | |
526 oop exception_oop = instanceKlass::cast(k)->allocate_instance(CHECK); | |
527 Handle exception (thread, exception_oop); | |
528 if (StackTraceInThrowable) { | |
529 java_lang_Throwable::fill_in_stack_trace(exception); | |
530 } | |
531 throw_and_post_jvmti_exception(thread, exception); | |
532 JRT_END | |
533 | |
534 address SharedRuntime::continuation_for_implicit_exception(JavaThread* thread, | |
535 address pc, | |
536 SharedRuntime::ImplicitExceptionKind exception_kind) | |
537 { | |
538 address target_pc = NULL; | |
539 | |
540 if (Interpreter::contains(pc)) { | |
541 #ifdef CC_INTERP | |
542 // C++ interpreter doesn't throw implicit exceptions | |
543 ShouldNotReachHere(); | |
544 #else | |
545 switch (exception_kind) { | |
546 case IMPLICIT_NULL: return Interpreter::throw_NullPointerException_entry(); | |
547 case IMPLICIT_DIVIDE_BY_ZERO: return Interpreter::throw_ArithmeticException_entry(); | |
548 case STACK_OVERFLOW: return Interpreter::throw_StackOverflowError_entry(); | |
549 default: ShouldNotReachHere(); | |
550 } | |
551 #endif // !CC_INTERP | |
552 } else { | |
553 switch (exception_kind) { | |
554 case STACK_OVERFLOW: { | |
555 // Stack overflow only occurs upon frame setup; the callee is | |
556 // going to be unwound. Dispatch to a shared runtime stub | |
557 // which will cause the StackOverflowError to be fabricated | |
558 // and processed. | |
559 // For stack overflow in deoptimization blob, cleanup thread. | |
560 if (thread->deopt_mark() != NULL) { | |
561 Deoptimization::cleanup_deopt_info(thread, NULL); | |
562 } | |
563 return StubRoutines::throw_StackOverflowError_entry(); | |
564 } | |
565 | |
566 case IMPLICIT_NULL: { | |
567 if (VtableStubs::contains(pc)) { | |
568 // We haven't yet entered the callee frame. Fabricate an | |
569 // exception and begin dispatching it in the caller. Since | |
570 // the caller was at a call site, it's safe to destroy all | |
571 // caller-saved registers, as these entry points do. | |
572 VtableStub* vt_stub = VtableStubs::stub_containing(pc); | |
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573 |
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574 // If vt_stub is NULL, then return NULL to signal handler to report the SEGV error. |
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575 if (vt_stub == NULL) return NULL; |
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576 |
0 | 577 if (vt_stub->is_abstract_method_error(pc)) { |
578 assert(!vt_stub->is_vtable_stub(), "should never see AbstractMethodErrors from vtable-type VtableStubs"); | |
579 return StubRoutines::throw_AbstractMethodError_entry(); | |
580 } else { | |
581 return StubRoutines::throw_NullPointerException_at_call_entry(); | |
582 } | |
583 } else { | |
584 CodeBlob* cb = CodeCache::find_blob(pc); | |
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585 |
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586 // If code blob is NULL, then return NULL to signal handler to report the SEGV error. |
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587 if (cb == NULL) return NULL; |
0 | 588 |
589 // Exception happened in CodeCache. Must be either: | |
590 // 1. Inline-cache check in C2I handler blob, | |
591 // 2. Inline-cache check in nmethod, or | |
592 // 3. Implict null exception in nmethod | |
593 | |
594 if (!cb->is_nmethod()) { | |
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595 guarantee(cb->is_adapter_blob() || cb->is_method_handles_adapter_blob(), |
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596 "exception happened outside interpreter, nmethods and vtable stubs (1)"); |
0 | 597 // There is no handler here, so we will simply unwind. |
598 return StubRoutines::throw_NullPointerException_at_call_entry(); | |
599 } | |
600 | |
601 // Otherwise, it's an nmethod. Consult its exception handlers. | |
602 nmethod* nm = (nmethod*)cb; | |
603 if (nm->inlinecache_check_contains(pc)) { | |
604 // exception happened inside inline-cache check code | |
605 // => the nmethod is not yet active (i.e., the frame | |
606 // is not set up yet) => use return address pushed by | |
607 // caller => don't push another return address | |
608 return StubRoutines::throw_NullPointerException_at_call_entry(); | |
609 } | |
610 | |
611 #ifndef PRODUCT | |
612 _implicit_null_throws++; | |
613 #endif | |
614 target_pc = nm->continuation_for_implicit_exception(pc); | |
1250 | 615 // If there's an unexpected fault, target_pc might be NULL, |
616 // in which case we want to fall through into the normal | |
617 // error handling code. | |
0 | 618 } |
619 | |
620 break; // fall through | |
621 } | |
622 | |
623 | |
624 case IMPLICIT_DIVIDE_BY_ZERO: { | |
625 nmethod* nm = CodeCache::find_nmethod(pc); | |
626 guarantee(nm != NULL, "must have containing nmethod for implicit division-by-zero exceptions"); | |
627 #ifndef PRODUCT | |
628 _implicit_div0_throws++; | |
629 #endif | |
630 target_pc = nm->continuation_for_implicit_exception(pc); | |
1250 | 631 // If there's an unexpected fault, target_pc might be NULL, |
632 // in which case we want to fall through into the normal | |
633 // error handling code. | |
0 | 634 break; // fall through |
635 } | |
636 | |
637 default: ShouldNotReachHere(); | |
638 } | |
639 | |
640 assert(exception_kind == IMPLICIT_NULL || exception_kind == IMPLICIT_DIVIDE_BY_ZERO, "wrong implicit exception kind"); | |
641 | |
642 // for AbortVMOnException flag | |
643 NOT_PRODUCT(Exceptions::debug_check_abort("java.lang.NullPointerException")); | |
644 if (exception_kind == IMPLICIT_NULL) { | |
645 Events::log("Implicit null exception at " INTPTR_FORMAT " to " INTPTR_FORMAT, pc, target_pc); | |
646 } else { | |
647 Events::log("Implicit division by zero exception at " INTPTR_FORMAT " to " INTPTR_FORMAT, pc, target_pc); | |
648 } | |
649 return target_pc; | |
650 } | |
651 | |
652 ShouldNotReachHere(); | |
653 return NULL; | |
654 } | |
655 | |
656 | |
657 JNI_ENTRY(void, throw_unsatisfied_link_error(JNIEnv* env, ...)) | |
658 { | |
659 THROW(vmSymbols::java_lang_UnsatisfiedLinkError()); | |
660 } | |
661 JNI_END | |
662 | |
663 | |
664 address SharedRuntime::native_method_throw_unsatisfied_link_error_entry() { | |
665 return CAST_FROM_FN_PTR(address, &throw_unsatisfied_link_error); | |
666 } | |
667 | |
668 | |
669 #ifndef PRODUCT | |
670 JRT_ENTRY(intptr_t, SharedRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2)) | |
671 const frame f = thread->last_frame(); | |
672 assert(f.is_interpreted_frame(), "must be an interpreted frame"); | |
673 #ifndef PRODUCT | |
674 methodHandle mh(THREAD, f.interpreter_frame_method()); | |
675 BytecodeTracer::trace(mh, f.interpreter_frame_bcp(), tos, tos2); | |
676 #endif // !PRODUCT | |
677 return preserve_this_value; | |
678 JRT_END | |
679 #endif // !PRODUCT | |
680 | |
681 | |
682 JRT_ENTRY(void, SharedRuntime::yield_all(JavaThread* thread, int attempts)) | |
683 os::yield_all(attempts); | |
684 JRT_END | |
685 | |
686 | |
687 JRT_ENTRY_NO_ASYNC(void, SharedRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) | |
688 assert(obj->is_oop(), "must be a valid oop"); | |
689 assert(obj->klass()->klass_part()->has_finalizer(), "shouldn't be here otherwise"); | |
690 instanceKlass::register_finalizer(instanceOop(obj), CHECK); | |
691 JRT_END | |
692 | |
693 | |
694 jlong SharedRuntime::get_java_tid(Thread* thread) { | |
695 if (thread != NULL) { | |
696 if (thread->is_Java_thread()) { | |
697 oop obj = ((JavaThread*)thread)->threadObj(); | |
698 return (obj == NULL) ? 0 : java_lang_Thread::thread_id(obj); | |
699 } | |
700 } | |
701 return 0; | |
702 } | |
703 | |
704 /** | |
705 * This function ought to be a void function, but cannot be because | |
706 * it gets turned into a tail-call on sparc, which runs into dtrace bug | |
707 * 6254741. Once that is fixed we can remove the dummy return value. | |
708 */ | |
709 int SharedRuntime::dtrace_object_alloc(oopDesc* o) { | |
710 return dtrace_object_alloc_base(Thread::current(), o); | |
711 } | |
712 | |
713 int SharedRuntime::dtrace_object_alloc_base(Thread* thread, oopDesc* o) { | |
714 assert(DTraceAllocProbes, "wrong call"); | |
715 Klass* klass = o->blueprint(); | |
716 int size = o->size(); | |
717 symbolOop name = klass->name(); | |
718 HS_DTRACE_PROBE4(hotspot, object__alloc, get_java_tid(thread), | |
719 name->bytes(), name->utf8_length(), size * HeapWordSize); | |
720 return 0; | |
721 } | |
722 | |
723 JRT_LEAF(int, SharedRuntime::dtrace_method_entry( | |
724 JavaThread* thread, methodOopDesc* method)) | |
725 assert(DTraceMethodProbes, "wrong call"); | |
726 symbolOop kname = method->klass_name(); | |
727 symbolOop name = method->name(); | |
728 symbolOop sig = method->signature(); | |
729 HS_DTRACE_PROBE7(hotspot, method__entry, get_java_tid(thread), | |
730 kname->bytes(), kname->utf8_length(), | |
731 name->bytes(), name->utf8_length(), | |
732 sig->bytes(), sig->utf8_length()); | |
733 return 0; | |
734 JRT_END | |
735 | |
736 JRT_LEAF(int, SharedRuntime::dtrace_method_exit( | |
737 JavaThread* thread, methodOopDesc* method)) | |
738 assert(DTraceMethodProbes, "wrong call"); | |
739 symbolOop kname = method->klass_name(); | |
740 symbolOop name = method->name(); | |
741 symbolOop sig = method->signature(); | |
742 HS_DTRACE_PROBE7(hotspot, method__return, get_java_tid(thread), | |
743 kname->bytes(), kname->utf8_length(), | |
744 name->bytes(), name->utf8_length(), | |
745 sig->bytes(), sig->utf8_length()); | |
746 return 0; | |
747 JRT_END | |
748 | |
749 | |
750 // Finds receiver, CallInfo (i.e. receiver method), and calling bytecode) | |
751 // for a call current in progress, i.e., arguments has been pushed on stack | |
752 // put callee has not been invoked yet. Used by: resolve virtual/static, | |
753 // vtable updates, etc. Caller frame must be compiled. | |
754 Handle SharedRuntime::find_callee_info(JavaThread* thread, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS) { | |
755 ResourceMark rm(THREAD); | |
756 | |
757 // last java frame on stack (which includes native call frames) | |
758 vframeStream vfst(thread, true); // Do not skip and javaCalls | |
759 | |
760 return find_callee_info_helper(thread, vfst, bc, callinfo, CHECK_(Handle())); | |
761 } | |
762 | |
763 | |
764 // Finds receiver, CallInfo (i.e. receiver method), and calling bytecode | |
765 // for a call current in progress, i.e., arguments has been pushed on stack | |
766 // but callee has not been invoked yet. Caller frame must be compiled. | |
767 Handle SharedRuntime::find_callee_info_helper(JavaThread* thread, | |
768 vframeStream& vfst, | |
769 Bytecodes::Code& bc, | |
770 CallInfo& callinfo, TRAPS) { | |
771 Handle receiver; | |
772 Handle nullHandle; //create a handy null handle for exception returns | |
773 | |
774 assert(!vfst.at_end(), "Java frame must exist"); | |
775 | |
776 // Find caller and bci from vframe | |
777 methodHandle caller (THREAD, vfst.method()); | |
778 int bci = vfst.bci(); | |
779 | |
780 // Find bytecode | |
781 Bytecode_invoke* bytecode = Bytecode_invoke_at(caller, bci); | |
782 bc = bytecode->adjusted_invoke_code(); | |
783 int bytecode_index = bytecode->index(); | |
784 | |
785 // Find receiver for non-static call | |
786 if (bc != Bytecodes::_invokestatic) { | |
787 // This register map must be update since we need to find the receiver for | |
788 // compiled frames. The receiver might be in a register. | |
789 RegisterMap reg_map2(thread); | |
790 frame stubFrame = thread->last_frame(); | |
791 // Caller-frame is a compiled frame | |
792 frame callerFrame = stubFrame.sender(®_map2); | |
793 | |
794 methodHandle callee = bytecode->static_target(CHECK_(nullHandle)); | |
795 if (callee.is_null()) { | |
796 THROW_(vmSymbols::java_lang_NoSuchMethodException(), nullHandle); | |
797 } | |
798 // Retrieve from a compiled argument list | |
799 receiver = Handle(THREAD, callerFrame.retrieve_receiver(®_map2)); | |
800 | |
801 if (receiver.is_null()) { | |
802 THROW_(vmSymbols::java_lang_NullPointerException(), nullHandle); | |
803 } | |
804 } | |
805 | |
806 // Resolve method. This is parameterized by bytecode. | |
807 constantPoolHandle constants (THREAD, caller->constants()); | |
808 assert (receiver.is_null() || receiver->is_oop(), "wrong receiver"); | |
809 LinkResolver::resolve_invoke(callinfo, receiver, constants, bytecode_index, bc, CHECK_(nullHandle)); | |
810 | |
811 #ifdef ASSERT | |
812 // Check that the receiver klass is of the right subtype and that it is initialized for virtual calls | |
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813 if (bc != Bytecodes::_invokestatic && bc != Bytecodes::_invokedynamic) { |
0 | 814 assert(receiver.not_null(), "should have thrown exception"); |
815 KlassHandle receiver_klass (THREAD, receiver->klass()); | |
816 klassOop rk = constants->klass_ref_at(bytecode_index, CHECK_(nullHandle)); | |
817 // klass is already loaded | |
818 KlassHandle static_receiver_klass (THREAD, rk); | |
819 assert(receiver_klass->is_subtype_of(static_receiver_klass()), "actual receiver must be subclass of static receiver klass"); | |
820 if (receiver_klass->oop_is_instance()) { | |
821 if (instanceKlass::cast(receiver_klass())->is_not_initialized()) { | |
822 tty->print_cr("ERROR: Klass not yet initialized!!"); | |
823 receiver_klass.print(); | |
824 } | |
825 assert (!instanceKlass::cast(receiver_klass())->is_not_initialized(), "receiver_klass must be initialized"); | |
826 } | |
827 } | |
828 #endif | |
829 | |
830 return receiver; | |
831 } | |
832 | |
833 methodHandle SharedRuntime::find_callee_method(JavaThread* thread, TRAPS) { | |
834 ResourceMark rm(THREAD); | |
835 // We need first to check if any Java activations (compiled, interpreted) | |
836 // exist on the stack since last JavaCall. If not, we need | |
837 // to get the target method from the JavaCall wrapper. | |
838 vframeStream vfst(thread, true); // Do not skip any javaCalls | |
839 methodHandle callee_method; | |
840 if (vfst.at_end()) { | |
841 // No Java frames were found on stack since we did the JavaCall. | |
842 // Hence the stack can only contain an entry_frame. We need to | |
843 // find the target method from the stub frame. | |
844 RegisterMap reg_map(thread, false); | |
845 frame fr = thread->last_frame(); | |
846 assert(fr.is_runtime_frame(), "must be a runtimeStub"); | |
847 fr = fr.sender(®_map); | |
848 assert(fr.is_entry_frame(), "must be"); | |
849 // fr is now pointing to the entry frame. | |
850 callee_method = methodHandle(THREAD, fr.entry_frame_call_wrapper()->callee_method()); | |
851 assert(fr.entry_frame_call_wrapper()->receiver() == NULL || !callee_method->is_static(), "non-null receiver for static call??"); | |
852 } else { | |
853 Bytecodes::Code bc; | |
854 CallInfo callinfo; | |
855 find_callee_info_helper(thread, vfst, bc, callinfo, CHECK_(methodHandle())); | |
856 callee_method = callinfo.selected_method(); | |
857 } | |
858 assert(callee_method()->is_method(), "must be"); | |
859 return callee_method; | |
860 } | |
861 | |
862 // Resolves a call. | |
863 methodHandle SharedRuntime::resolve_helper(JavaThread *thread, | |
864 bool is_virtual, | |
865 bool is_optimized, TRAPS) { | |
866 methodHandle callee_method; | |
867 callee_method = resolve_sub_helper(thread, is_virtual, is_optimized, THREAD); | |
868 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { | |
869 int retry_count = 0; | |
870 while (!HAS_PENDING_EXCEPTION && callee_method->is_old() && | |
1142 | 871 callee_method->method_holder() != SystemDictionary::Object_klass()) { |
0 | 872 // If has a pending exception then there is no need to re-try to |
873 // resolve this method. | |
874 // If the method has been redefined, we need to try again. | |
875 // Hack: we have no way to update the vtables of arrays, so don't | |
876 // require that java.lang.Object has been updated. | |
877 | |
878 // It is very unlikely that method is redefined more than 100 times | |
879 // in the middle of resolve. If it is looping here more than 100 times | |
880 // means then there could be a bug here. | |
881 guarantee((retry_count++ < 100), | |
882 "Could not resolve to latest version of redefined method"); | |
883 // method is redefined in the middle of resolve so re-try. | |
884 callee_method = resolve_sub_helper(thread, is_virtual, is_optimized, THREAD); | |
885 } | |
886 } | |
887 return callee_method; | |
888 } | |
889 | |
890 // Resolves a call. The compilers generate code for calls that go here | |
891 // and are patched with the real destination of the call. | |
892 methodHandle SharedRuntime::resolve_sub_helper(JavaThread *thread, | |
893 bool is_virtual, | |
894 bool is_optimized, TRAPS) { | |
895 | |
896 ResourceMark rm(thread); | |
897 RegisterMap cbl_map(thread, false); | |
898 frame caller_frame = thread->last_frame().sender(&cbl_map); | |
899 | |
1295 | 900 CodeBlob* caller_cb = caller_frame.cb(); |
901 guarantee(caller_cb != NULL && caller_cb->is_nmethod(), "must be called from nmethod"); | |
902 nmethod* caller_nm = caller_cb->as_nmethod_or_null(); | |
0 | 903 // make sure caller is not getting deoptimized |
904 // and removed before we are done with it. | |
905 // CLEANUP - with lazy deopt shouldn't need this lock | |
1295 | 906 nmethodLocker caller_lock(caller_nm); |
0 | 907 |
908 | |
909 // determine call info & receiver | |
910 // note: a) receiver is NULL for static calls | |
911 // b) an exception is thrown if receiver is NULL for non-static calls | |
912 CallInfo call_info; | |
913 Bytecodes::Code invoke_code = Bytecodes::_illegal; | |
914 Handle receiver = find_callee_info(thread, invoke_code, | |
915 call_info, CHECK_(methodHandle())); | |
916 methodHandle callee_method = call_info.selected_method(); | |
917 | |
918 assert((!is_virtual && invoke_code == Bytecodes::_invokestatic) || | |
919 ( is_virtual && invoke_code != Bytecodes::_invokestatic), "inconsistent bytecode"); | |
920 | |
921 #ifndef PRODUCT | |
922 // tracing/debugging/statistics | |
923 int *addr = (is_optimized) ? (&_resolve_opt_virtual_ctr) : | |
924 (is_virtual) ? (&_resolve_virtual_ctr) : | |
925 (&_resolve_static_ctr); | |
926 Atomic::inc(addr); | |
927 | |
928 if (TraceCallFixup) { | |
929 ResourceMark rm(thread); | |
930 tty->print("resolving %s%s (%s) call to", | |
931 (is_optimized) ? "optimized " : "", (is_virtual) ? "virtual" : "static", | |
932 Bytecodes::name(invoke_code)); | |
933 callee_method->print_short_name(tty); | |
934 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
935 } | |
936 #endif | |
937 | |
1295 | 938 // JSR 292 |
939 // If the resolved method is a MethodHandle invoke target the call | |
940 // site must be a MethodHandle call site. | |
941 if (callee_method->is_method_handle_invoke()) { | |
942 assert(caller_nm->is_method_handle_return(caller_frame.pc()), "must be MH call site"); | |
943 } | |
944 | |
0 | 945 // Compute entry points. This might require generation of C2I converter |
946 // frames, so we cannot be holding any locks here. Furthermore, the | |
947 // computation of the entry points is independent of patching the call. We | |
948 // always return the entry-point, but we only patch the stub if the call has | |
949 // not been deoptimized. Return values: For a virtual call this is an | |
950 // (cached_oop, destination address) pair. For a static call/optimized | |
951 // virtual this is just a destination address. | |
952 | |
953 StaticCallInfo static_call_info; | |
954 CompiledICInfo virtual_call_info; | |
955 | |
956 // Make sure the callee nmethod does not get deoptimized and removed before | |
957 // we are done patching the code. | |
1295 | 958 nmethod* callee_nm = callee_method->code(); |
959 nmethodLocker nl_callee(callee_nm); | |
0 | 960 #ifdef ASSERT |
1295 | 961 address dest_entry_point = callee_nm == NULL ? 0 : callee_nm->entry_point(); // used below |
0 | 962 #endif |
963 | |
964 if (is_virtual) { | |
965 assert(receiver.not_null(), "sanity check"); | |
966 bool static_bound = call_info.resolved_method()->can_be_statically_bound(); | |
967 KlassHandle h_klass(THREAD, receiver->klass()); | |
968 CompiledIC::compute_monomorphic_entry(callee_method, h_klass, | |
969 is_optimized, static_bound, virtual_call_info, | |
970 CHECK_(methodHandle())); | |
971 } else { | |
972 // static call | |
973 CompiledStaticCall::compute_entry(callee_method, static_call_info); | |
974 } | |
975 | |
976 // grab lock, check for deoptimization and potentially patch caller | |
977 { | |
978 MutexLocker ml_patch(CompiledIC_lock); | |
979 | |
980 // Now that we are ready to patch if the methodOop was redefined then | |
981 // don't update call site and let the caller retry. | |
982 | |
983 if (!callee_method->is_old()) { | |
984 #ifdef ASSERT | |
985 // We must not try to patch to jump to an already unloaded method. | |
986 if (dest_entry_point != 0) { | |
987 assert(CodeCache::find_blob(dest_entry_point) != NULL, | |
988 "should not unload nmethod while locked"); | |
989 } | |
990 #endif | |
991 if (is_virtual) { | |
992 CompiledIC* inline_cache = CompiledIC_before(caller_frame.pc()); | |
993 if (inline_cache->is_clean()) { | |
994 inline_cache->set_to_monomorphic(virtual_call_info); | |
995 } | |
996 } else { | |
997 CompiledStaticCall* ssc = compiledStaticCall_before(caller_frame.pc()); | |
998 if (ssc->is_clean()) ssc->set(static_call_info); | |
999 } | |
1000 } | |
1001 | |
1002 } // unlock CompiledIC_lock | |
1003 | |
1004 return callee_method; | |
1005 } | |
1006 | |
1007 | |
1008 // Inline caches exist only in compiled code | |
1009 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_ic_miss(JavaThread* thread)) | |
1010 #ifdef ASSERT | |
1011 RegisterMap reg_map(thread, false); | |
1012 frame stub_frame = thread->last_frame(); | |
1013 assert(stub_frame.is_runtime_frame(), "sanity check"); | |
1014 frame caller_frame = stub_frame.sender(®_map); | |
1015 assert(!caller_frame.is_interpreted_frame() && !caller_frame.is_entry_frame(), "unexpected frame"); | |
1016 #endif /* ASSERT */ | |
1017 | |
1018 methodHandle callee_method; | |
1019 JRT_BLOCK | |
1020 callee_method = SharedRuntime::handle_ic_miss_helper(thread, CHECK_NULL); | |
1021 // Return methodOop through TLS | |
1022 thread->set_vm_result(callee_method()); | |
1023 JRT_BLOCK_END | |
1024 // return compiled code entry point after potential safepoints | |
1025 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1026 return callee_method->verified_code_entry(); | |
1027 JRT_END | |
1028 | |
1029 | |
1030 // Handle call site that has been made non-entrant | |
1031 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method(JavaThread* thread)) | |
1032 // 6243940 We might end up in here if the callee is deoptimized | |
1033 // as we race to call it. We don't want to take a safepoint if | |
1034 // the caller was interpreted because the caller frame will look | |
1035 // interpreted to the stack walkers and arguments are now | |
1036 // "compiled" so it is much better to make this transition | |
1037 // invisible to the stack walking code. The i2c path will | |
1038 // place the callee method in the callee_target. It is stashed | |
1039 // there because if we try and find the callee by normal means a | |
1040 // safepoint is possible and have trouble gc'ing the compiled args. | |
1041 RegisterMap reg_map(thread, false); | |
1042 frame stub_frame = thread->last_frame(); | |
1043 assert(stub_frame.is_runtime_frame(), "sanity check"); | |
1044 frame caller_frame = stub_frame.sender(®_map); | |
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1046 // MethodHandle invokes don't have a CompiledIC and should always |
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1047 // simply redispatch to the callee_target. |
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1048 address sender_pc = caller_frame.pc(); |
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1049 CodeBlob* sender_cb = caller_frame.cb(); |
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1050 nmethod* sender_nm = sender_cb->as_nmethod_or_null(); |
1204 | 1051 bool is_mh_invoke_via_adapter = false; // Direct c2c call or via adapter? |
1052 if (sender_nm != NULL && sender_nm->is_method_handle_return(sender_pc)) { | |
1053 // If the callee_target is set, then we have come here via an i2c | |
1054 // adapter. | |
1055 methodOop callee = thread->callee_target(); | |
1056 if (callee != NULL) { | |
1057 assert(callee->is_method(), "sanity"); | |
1058 is_mh_invoke_via_adapter = true; | |
1059 } | |
1060 } | |
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1062 if (caller_frame.is_interpreted_frame() || |
1204 | 1063 caller_frame.is_entry_frame() || |
1064 is_mh_invoke_via_adapter) { | |
0 | 1065 methodOop callee = thread->callee_target(); |
1066 guarantee(callee != NULL && callee->is_method(), "bad handshake"); | |
1067 thread->set_vm_result(callee); | |
1068 thread->set_callee_target(NULL); | |
1069 return callee->get_c2i_entry(); | |
1070 } | |
1071 | |
1072 // Must be compiled to compiled path which is safe to stackwalk | |
1073 methodHandle callee_method; | |
1074 JRT_BLOCK | |
1075 // Force resolving of caller (if we called from compiled frame) | |
1076 callee_method = SharedRuntime::reresolve_call_site(thread, CHECK_NULL); | |
1077 thread->set_vm_result(callee_method()); | |
1078 JRT_BLOCK_END | |
1079 // return compiled code entry point after potential safepoints | |
1080 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1081 return callee_method->verified_code_entry(); | |
1082 JRT_END | |
1083 | |
1084 | |
1085 // resolve a static call and patch code | |
1086 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_static_call_C(JavaThread *thread )) | |
1087 methodHandle callee_method; | |
1088 JRT_BLOCK | |
1089 callee_method = SharedRuntime::resolve_helper(thread, false, false, CHECK_NULL); | |
1090 thread->set_vm_result(callee_method()); | |
1091 JRT_BLOCK_END | |
1092 // return compiled code entry point after potential safepoints | |
1093 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1094 return callee_method->verified_code_entry(); | |
1095 JRT_END | |
1096 | |
1097 | |
1098 // resolve virtual call and update inline cache to monomorphic | |
1099 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_virtual_call_C(JavaThread *thread )) | |
1100 methodHandle callee_method; | |
1101 JRT_BLOCK | |
1102 callee_method = SharedRuntime::resolve_helper(thread, true, false, CHECK_NULL); | |
1103 thread->set_vm_result(callee_method()); | |
1104 JRT_BLOCK_END | |
1105 // return compiled code entry point after potential safepoints | |
1106 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1107 return callee_method->verified_code_entry(); | |
1108 JRT_END | |
1109 | |
1110 | |
1111 // Resolve a virtual call that can be statically bound (e.g., always | |
1112 // monomorphic, so it has no inline cache). Patch code to resolved target. | |
1113 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_opt_virtual_call_C(JavaThread *thread)) | |
1114 methodHandle callee_method; | |
1115 JRT_BLOCK | |
1116 callee_method = SharedRuntime::resolve_helper(thread, true, true, CHECK_NULL); | |
1117 thread->set_vm_result(callee_method()); | |
1118 JRT_BLOCK_END | |
1119 // return compiled code entry point after potential safepoints | |
1120 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1121 return callee_method->verified_code_entry(); | |
1122 JRT_END | |
1123 | |
1124 | |
1125 | |
1126 | |
1127 | |
1128 methodHandle SharedRuntime::handle_ic_miss_helper(JavaThread *thread, TRAPS) { | |
1129 ResourceMark rm(thread); | |
1130 CallInfo call_info; | |
1131 Bytecodes::Code bc; | |
1132 | |
1133 // receiver is NULL for static calls. An exception is thrown for NULL | |
1134 // receivers for non-static calls | |
1135 Handle receiver = find_callee_info(thread, bc, call_info, | |
1136 CHECK_(methodHandle())); | |
1137 // Compiler1 can produce virtual call sites that can actually be statically bound | |
1138 // If we fell thru to below we would think that the site was going megamorphic | |
1139 // when in fact the site can never miss. Worse because we'd think it was megamorphic | |
1140 // we'd try and do a vtable dispatch however methods that can be statically bound | |
1141 // don't have vtable entries (vtable_index < 0) and we'd blow up. So we force a | |
1142 // reresolution of the call site (as if we did a handle_wrong_method and not an | |
1143 // plain ic_miss) and the site will be converted to an optimized virtual call site | |
1144 // never to miss again. I don't believe C2 will produce code like this but if it | |
1145 // did this would still be the correct thing to do for it too, hence no ifdef. | |
1146 // | |
1147 if (call_info.resolved_method()->can_be_statically_bound()) { | |
1148 methodHandle callee_method = SharedRuntime::reresolve_call_site(thread, CHECK_(methodHandle())); | |
1149 if (TraceCallFixup) { | |
1150 RegisterMap reg_map(thread, false); | |
1151 frame caller_frame = thread->last_frame().sender(®_map); | |
1152 ResourceMark rm(thread); | |
1153 tty->print("converting IC miss to reresolve (%s) call to", Bytecodes::name(bc)); | |
1154 callee_method->print_short_name(tty); | |
1155 tty->print_cr(" from pc: " INTPTR_FORMAT, caller_frame.pc()); | |
1156 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1157 } | |
1158 return callee_method; | |
1159 } | |
1160 | |
1161 methodHandle callee_method = call_info.selected_method(); | |
1162 | |
1163 bool should_be_mono = false; | |
1164 | |
1165 #ifndef PRODUCT | |
1166 Atomic::inc(&_ic_miss_ctr); | |
1167 | |
1168 // Statistics & Tracing | |
1169 if (TraceCallFixup) { | |
1170 ResourceMark rm(thread); | |
1171 tty->print("IC miss (%s) call to", Bytecodes::name(bc)); | |
1172 callee_method->print_short_name(tty); | |
1173 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1174 } | |
1175 | |
1176 if (ICMissHistogram) { | |
1177 MutexLocker m(VMStatistic_lock); | |
1178 RegisterMap reg_map(thread, false); | |
1179 frame f = thread->last_frame().real_sender(®_map);// skip runtime stub | |
1180 // produce statistics under the lock | |
1181 trace_ic_miss(f.pc()); | |
1182 } | |
1183 #endif | |
1184 | |
1185 // install an event collector so that when a vtable stub is created the | |
1186 // profiler can be notified via a DYNAMIC_CODE_GENERATED event. The | |
1187 // event can't be posted when the stub is created as locks are held | |
1188 // - instead the event will be deferred until the event collector goes | |
1189 // out of scope. | |
1190 JvmtiDynamicCodeEventCollector event_collector; | |
1191 | |
1192 // Update inline cache to megamorphic. Skip update if caller has been | |
1193 // made non-entrant or we are called from interpreted. | |
1194 { MutexLocker ml_patch (CompiledIC_lock); | |
1195 RegisterMap reg_map(thread, false); | |
1196 frame caller_frame = thread->last_frame().sender(®_map); | |
1197 CodeBlob* cb = caller_frame.cb(); | |
1198 if (cb->is_nmethod() && ((nmethod*)cb)->is_in_use()) { | |
1199 // Not a non-entrant nmethod, so find inline_cache | |
1200 CompiledIC* inline_cache = CompiledIC_before(caller_frame.pc()); | |
1201 bool should_be_mono = false; | |
1202 if (inline_cache->is_optimized()) { | |
1203 if (TraceCallFixup) { | |
1204 ResourceMark rm(thread); | |
1205 tty->print("OPTIMIZED IC miss (%s) call to", Bytecodes::name(bc)); | |
1206 callee_method->print_short_name(tty); | |
1207 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1208 } | |
1209 should_be_mono = true; | |
1210 } else { | |
1211 compiledICHolderOop ic_oop = (compiledICHolderOop) inline_cache->cached_oop(); | |
1212 if ( ic_oop != NULL && ic_oop->is_compiledICHolder()) { | |
1213 | |
1214 if (receiver()->klass() == ic_oop->holder_klass()) { | |
1215 // This isn't a real miss. We must have seen that compiled code | |
1216 // is now available and we want the call site converted to a | |
1217 // monomorphic compiled call site. | |
1218 // We can't assert for callee_method->code() != NULL because it | |
1219 // could have been deoptimized in the meantime | |
1220 if (TraceCallFixup) { | |
1221 ResourceMark rm(thread); | |
1222 tty->print("FALSE IC miss (%s) converting to compiled call to", Bytecodes::name(bc)); | |
1223 callee_method->print_short_name(tty); | |
1224 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1225 } | |
1226 should_be_mono = true; | |
1227 } | |
1228 } | |
1229 } | |
1230 | |
1231 if (should_be_mono) { | |
1232 | |
1233 // We have a path that was monomorphic but was going interpreted | |
1234 // and now we have (or had) a compiled entry. We correct the IC | |
1235 // by using a new icBuffer. | |
1236 CompiledICInfo info; | |
1237 KlassHandle receiver_klass(THREAD, receiver()->klass()); | |
1238 inline_cache->compute_monomorphic_entry(callee_method, | |
1239 receiver_klass, | |
1240 inline_cache->is_optimized(), | |
1241 false, | |
1242 info, CHECK_(methodHandle())); | |
1243 inline_cache->set_to_monomorphic(info); | |
1244 } else if (!inline_cache->is_megamorphic() && !inline_cache->is_clean()) { | |
1245 // Change to megamorphic | |
1246 inline_cache->set_to_megamorphic(&call_info, bc, CHECK_(methodHandle())); | |
1247 } else { | |
1248 // Either clean or megamorphic | |
1249 } | |
1250 } | |
1251 } // Release CompiledIC_lock | |
1252 | |
1253 return callee_method; | |
1254 } | |
1255 | |
1256 // | |
1257 // Resets a call-site in compiled code so it will get resolved again. | |
1258 // This routines handles both virtual call sites, optimized virtual call | |
1259 // sites, and static call sites. Typically used to change a call sites | |
1260 // destination from compiled to interpreted. | |
1261 // | |
1262 methodHandle SharedRuntime::reresolve_call_site(JavaThread *thread, TRAPS) { | |
1263 ResourceMark rm(thread); | |
1264 RegisterMap reg_map(thread, false); | |
1265 frame stub_frame = thread->last_frame(); | |
1266 assert(stub_frame.is_runtime_frame(), "must be a runtimeStub"); | |
1267 frame caller = stub_frame.sender(®_map); | |
1268 | |
1269 // Do nothing if the frame isn't a live compiled frame. | |
1270 // nmethod could be deoptimized by the time we get here | |
1271 // so no update to the caller is needed. | |
1272 | |
1273 if (caller.is_compiled_frame() && !caller.is_deoptimized_frame()) { | |
1274 | |
1275 address pc = caller.pc(); | |
1276 Events::log("update call-site at pc " INTPTR_FORMAT, pc); | |
1277 | |
1278 // Default call_addr is the location of the "basic" call. | |
1279 // Determine the address of the call we a reresolving. With | |
1280 // Inline Caches we will always find a recognizable call. | |
1281 // With Inline Caches disabled we may or may not find a | |
1282 // recognizable call. We will always find a call for static | |
1283 // calls and for optimized virtual calls. For vanilla virtual | |
1284 // calls it depends on the state of the UseInlineCaches switch. | |
1285 // | |
1286 // With Inline Caches disabled we can get here for a virtual call | |
1287 // for two reasons: | |
1288 // 1 - calling an abstract method. The vtable for abstract methods | |
1289 // will run us thru handle_wrong_method and we will eventually | |
1290 // end up in the interpreter to throw the ame. | |
1291 // 2 - a racing deoptimization. We could be doing a vanilla vtable | |
1292 // call and between the time we fetch the entry address and | |
1293 // we jump to it the target gets deoptimized. Similar to 1 | |
1294 // we will wind up in the interprter (thru a c2i with c2). | |
1295 // | |
1296 address call_addr = NULL; | |
1297 { | |
1298 // Get call instruction under lock because another thread may be | |
1299 // busy patching it. | |
1300 MutexLockerEx ml_patch(Patching_lock, Mutex::_no_safepoint_check_flag); | |
1301 // Location of call instruction | |
1302 if (NativeCall::is_call_before(pc)) { | |
1303 NativeCall *ncall = nativeCall_before(pc); | |
1304 call_addr = ncall->instruction_address(); | |
1305 } | |
1306 } | |
1307 | |
1308 // Check for static or virtual call | |
1309 bool is_static_call = false; | |
1310 nmethod* caller_nm = CodeCache::find_nmethod(pc); | |
1311 // Make sure nmethod doesn't get deoptimized and removed until | |
1312 // this is done with it. | |
1313 // CLEANUP - with lazy deopt shouldn't need this lock | |
1314 nmethodLocker nmlock(caller_nm); | |
1315 | |
1316 if (call_addr != NULL) { | |
1317 RelocIterator iter(caller_nm, call_addr, call_addr+1); | |
1318 int ret = iter.next(); // Get item | |
1319 if (ret) { | |
1320 assert(iter.addr() == call_addr, "must find call"); | |
1321 if (iter.type() == relocInfo::static_call_type) { | |
1322 is_static_call = true; | |
1323 } else { | |
1324 assert(iter.type() == relocInfo::virtual_call_type || | |
1325 iter.type() == relocInfo::opt_virtual_call_type | |
1326 , "unexpected relocInfo. type"); | |
1327 } | |
1328 } else { | |
1329 assert(!UseInlineCaches, "relocation info. must exist for this address"); | |
1330 } | |
1331 | |
1332 // Cleaning the inline cache will force a new resolve. This is more robust | |
1333 // than directly setting it to the new destination, since resolving of calls | |
1334 // is always done through the same code path. (experience shows that it | |
1335 // leads to very hard to track down bugs, if an inline cache gets updated | |
1336 // to a wrong method). It should not be performance critical, since the | |
1337 // resolve is only done once. | |
1338 | |
1339 MutexLocker ml(CompiledIC_lock); | |
1340 // | |
1341 // We do not patch the call site if the nmethod has been made non-entrant | |
1342 // as it is a waste of time | |
1343 // | |
1344 if (caller_nm->is_in_use()) { | |
1345 if (is_static_call) { | |
1346 CompiledStaticCall* ssc= compiledStaticCall_at(call_addr); | |
1347 ssc->set_to_clean(); | |
1348 } else { | |
1349 // compiled, dispatched call (which used to call an interpreted method) | |
1350 CompiledIC* inline_cache = CompiledIC_at(call_addr); | |
1351 inline_cache->set_to_clean(); | |
1352 } | |
1353 } | |
1354 } | |
1355 | |
1356 } | |
1357 | |
1358 methodHandle callee_method = find_callee_method(thread, CHECK_(methodHandle())); | |
1359 | |
1360 | |
1361 #ifndef PRODUCT | |
1362 Atomic::inc(&_wrong_method_ctr); | |
1363 | |
1364 if (TraceCallFixup) { | |
1365 ResourceMark rm(thread); | |
1366 tty->print("handle_wrong_method reresolving call to"); | |
1367 callee_method->print_short_name(tty); | |
1368 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1369 } | |
1370 #endif | |
1371 | |
1372 return callee_method; | |
1373 } | |
1374 | |
1375 // --------------------------------------------------------------------------- | |
1376 // We are calling the interpreter via a c2i. Normally this would mean that | |
1377 // we were called by a compiled method. However we could have lost a race | |
1378 // where we went int -> i2c -> c2i and so the caller could in fact be | |
1205 | 1379 // interpreted. If the caller is compiled we attempt to patch the caller |
0 | 1380 // so he no longer calls into the interpreter. |
1381 IRT_LEAF(void, SharedRuntime::fixup_callers_callsite(methodOopDesc* method, address caller_pc)) | |
1382 methodOop moop(method); | |
1383 | |
1384 address entry_point = moop->from_compiled_entry(); | |
1385 | |
1386 // It's possible that deoptimization can occur at a call site which hasn't | |
1387 // been resolved yet, in which case this function will be called from | |
1388 // an nmethod that has been patched for deopt and we can ignore the | |
1389 // request for a fixup. | |
1390 // Also it is possible that we lost a race in that from_compiled_entry | |
1391 // is now back to the i2c in that case we don't need to patch and if | |
1392 // we did we'd leap into space because the callsite needs to use | |
1393 // "to interpreter" stub in order to load up the methodOop. Don't | |
1394 // ask me how I know this... | |
1395 | |
1396 CodeBlob* cb = CodeCache::find_blob(caller_pc); | |
1205 | 1397 if (!cb->is_nmethod() || entry_point == moop->get_c2i_entry()) { |
1398 return; | |
1399 } | |
1400 | |
1401 // The check above makes sure this is a nmethod. | |
1402 nmethod* nm = cb->as_nmethod_or_null(); | |
1403 assert(nm, "must be"); | |
1404 | |
1405 // Don't fixup MethodHandle call sites as c2i/i2c adapters are used | |
1406 // to implement MethodHandle actions. | |
1407 if (nm->is_method_handle_return(caller_pc)) { | |
0 | 1408 return; |
1409 } | |
1410 | |
1411 // There is a benign race here. We could be attempting to patch to a compiled | |
1412 // entry point at the same time the callee is being deoptimized. If that is | |
1413 // the case then entry_point may in fact point to a c2i and we'd patch the | |
1414 // call site with the same old data. clear_code will set code() to NULL | |
1415 // at the end of it. If we happen to see that NULL then we can skip trying | |
1416 // to patch. If we hit the window where the callee has a c2i in the | |
1417 // from_compiled_entry and the NULL isn't present yet then we lose the race | |
1418 // and patch the code with the same old data. Asi es la vida. | |
1419 | |
1420 if (moop->code() == NULL) return; | |
1421 | |
1205 | 1422 if (nm->is_in_use()) { |
0 | 1423 |
1424 // Expect to find a native call there (unless it was no-inline cache vtable dispatch) | |
1425 MutexLockerEx ml_patch(Patching_lock, Mutex::_no_safepoint_check_flag); | |
1426 if (NativeCall::is_call_before(caller_pc + frame::pc_return_offset)) { | |
1427 NativeCall *call = nativeCall_before(caller_pc + frame::pc_return_offset); | |
1428 // | |
1429 // bug 6281185. We might get here after resolving a call site to a vanilla | |
1430 // virtual call. Because the resolvee uses the verified entry it may then | |
1431 // see compiled code and attempt to patch the site by calling us. This would | |
1432 // then incorrectly convert the call site to optimized and its downhill from | |
1433 // there. If you're lucky you'll get the assert in the bugid, if not you've | |
1434 // just made a call site that could be megamorphic into a monomorphic site | |
1435 // for the rest of its life! Just another racing bug in the life of | |
1436 // fixup_callers_callsite ... | |
1437 // | |
1438 RelocIterator iter(cb, call->instruction_address(), call->next_instruction_address()); | |
1439 iter.next(); | |
1440 assert(iter.has_current(), "must have a reloc at java call site"); | |
1441 relocInfo::relocType typ = iter.reloc()->type(); | |
1442 if ( typ != relocInfo::static_call_type && | |
1443 typ != relocInfo::opt_virtual_call_type && | |
1444 typ != relocInfo::static_stub_type) { | |
1445 return; | |
1446 } | |
1447 address destination = call->destination(); | |
1448 if (destination != entry_point) { | |
1449 CodeBlob* callee = CodeCache::find_blob(destination); | |
1450 // callee == cb seems weird. It means calling interpreter thru stub. | |
1451 if (callee == cb || callee->is_adapter_blob()) { | |
1452 // static call or optimized virtual | |
1453 if (TraceCallFixup) { | |
1204 | 1454 tty->print("fixup callsite at " INTPTR_FORMAT " to compiled code for", caller_pc); |
0 | 1455 moop->print_short_name(tty); |
1456 tty->print_cr(" to " INTPTR_FORMAT, entry_point); | |
1457 } | |
1458 call->set_destination_mt_safe(entry_point); | |
1459 } else { | |
1460 if (TraceCallFixup) { | |
1461 tty->print("failed to fixup callsite at " INTPTR_FORMAT " to compiled code for", caller_pc); | |
1462 moop->print_short_name(tty); | |
1463 tty->print_cr(" to " INTPTR_FORMAT, entry_point); | |
1464 } | |
1465 // assert is too strong could also be resolve destinations. | |
1466 // assert(InlineCacheBuffer::contains(destination) || VtableStubs::contains(destination), "must be"); | |
1467 } | |
1468 } else { | |
1469 if (TraceCallFixup) { | |
1204 | 1470 tty->print("already patched callsite at " INTPTR_FORMAT " to compiled code for", caller_pc); |
0 | 1471 moop->print_short_name(tty); |
1472 tty->print_cr(" to " INTPTR_FORMAT, entry_point); | |
1473 } | |
1474 } | |
1475 } | |
1476 } | |
1477 | |
1478 IRT_END | |
1479 | |
1480 | |
1481 // same as JVM_Arraycopy, but called directly from compiled code | |
1482 JRT_ENTRY(void, SharedRuntime::slow_arraycopy_C(oopDesc* src, jint src_pos, | |
1483 oopDesc* dest, jint dest_pos, | |
1484 jint length, | |
1485 JavaThread* thread)) { | |
1486 #ifndef PRODUCT | |
1487 _slow_array_copy_ctr++; | |
1488 #endif | |
1489 // Check if we have null pointers | |
1490 if (src == NULL || dest == NULL) { | |
1491 THROW(vmSymbols::java_lang_NullPointerException()); | |
1492 } | |
1493 // Do the copy. The casts to arrayOop are necessary to the copy_array API, | |
1494 // even though the copy_array API also performs dynamic checks to ensure | |
1495 // that src and dest are truly arrays (and are conformable). | |
1496 // The copy_array mechanism is awkward and could be removed, but | |
1497 // the compilers don't call this function except as a last resort, | |
1498 // so it probably doesn't matter. | |
1499 Klass::cast(src->klass())->copy_array((arrayOopDesc*)src, src_pos, | |
1500 (arrayOopDesc*)dest, dest_pos, | |
1501 length, thread); | |
1502 } | |
1503 JRT_END | |
1504 | |
1505 char* SharedRuntime::generate_class_cast_message( | |
1506 JavaThread* thread, const char* objName) { | |
1507 | |
1508 // Get target class name from the checkcast instruction | |
1509 vframeStream vfst(thread, true); | |
1510 assert(!vfst.at_end(), "Java frame must exist"); | |
1511 Bytecode_checkcast* cc = Bytecode_checkcast_at( | |
1512 vfst.method()->bcp_from(vfst.bci())); | |
1513 Klass* targetKlass = Klass::cast(vfst.method()->constants()->klass_at( | |
1514 cc->index(), thread)); | |
1515 return generate_class_cast_message(objName, targetKlass->external_name()); | |
1516 } | |
1517 | |
710 | 1518 char* SharedRuntime::generate_wrong_method_type_message(JavaThread* thread, |
1519 oopDesc* required, | |
1520 oopDesc* actual) { | |
1521 assert(EnableMethodHandles, ""); | |
1522 oop singleKlass = wrong_method_type_is_for_single_argument(thread, required); | |
1523 if (singleKlass != NULL) { | |
1524 const char* objName = "argument or return value"; | |
1525 if (actual != NULL) { | |
1526 // be flexible about the junk passed in: | |
1527 klassOop ak = (actual->is_klass() | |
1528 ? (klassOop)actual | |
1529 : actual->klass()); | |
1530 objName = Klass::cast(ak)->external_name(); | |
1531 } | |
1532 Klass* targetKlass = Klass::cast(required->is_klass() | |
1533 ? (klassOop)required | |
1534 : java_lang_Class::as_klassOop(required)); | |
1535 return generate_class_cast_message(objName, targetKlass->external_name()); | |
1536 } else { | |
1537 // %%% need to get the MethodType string, without messing around too much | |
1538 // Get a signature from the invoke instruction | |
1539 const char* mhName = "method handle"; | |
1540 const char* targetType = "the required signature"; | |
1541 vframeStream vfst(thread, true); | |
1542 if (!vfst.at_end()) { | |
1543 Bytecode_invoke* call = Bytecode_invoke_at(vfst.method(), vfst.bci()); | |
1544 methodHandle target; | |
1545 { | |
1546 EXCEPTION_MARK; | |
1547 target = call->static_target(THREAD); | |
1548 if (HAS_PENDING_EXCEPTION) { CLEAR_PENDING_EXCEPTION; } | |
1549 } | |
1550 if (target.not_null() | |
1551 && target->is_method_handle_invoke() | |
1552 && required == target->method_handle_type()) { | |
1553 targetType = target->signature()->as_C_string(); | |
1554 } | |
1555 } | |
1556 klassOop kignore; int fignore; | |
1557 methodOop actual_method = MethodHandles::decode_method(actual, | |
1558 kignore, fignore); | |
1559 if (actual_method != NULL) { | |
1560 if (actual_method->name() == vmSymbols::invoke_name()) | |
1561 mhName = "$"; | |
1562 else | |
1563 mhName = actual_method->signature()->as_C_string(); | |
1564 if (mhName[0] == '$') | |
1565 mhName = actual_method->signature()->as_C_string(); | |
1566 } | |
1567 return generate_class_cast_message(mhName, targetType, | |
1568 " cannot be called as "); | |
1569 } | |
1570 } | |
1571 | |
1572 oop SharedRuntime::wrong_method_type_is_for_single_argument(JavaThread* thr, | |
1573 oopDesc* required) { | |
1574 if (required == NULL) return NULL; | |
1142 | 1575 if (required->klass() == SystemDictionary::Class_klass()) |
710 | 1576 return required; |
1577 if (required->is_klass()) | |
1578 return Klass::cast(klassOop(required))->java_mirror(); | |
1579 return NULL; | |
1580 } | |
1581 | |
1582 | |
0 | 1583 char* SharedRuntime::generate_class_cast_message( |
710 | 1584 const char* objName, const char* targetKlassName, const char* desc) { |
0 | 1585 size_t msglen = strlen(objName) + strlen(desc) + strlen(targetKlassName) + 1; |
1586 | |
53 | 1587 char* message = NEW_RESOURCE_ARRAY(char, msglen); |
0 | 1588 if (NULL == message) { |
53 | 1589 // Shouldn't happen, but don't cause even more problems if it does |
0 | 1590 message = const_cast<char*>(objName); |
1591 } else { | |
1592 jio_snprintf(message, msglen, "%s%s%s", objName, desc, targetKlassName); | |
1593 } | |
1594 return message; | |
1595 } | |
1596 | |
1597 JRT_LEAF(void, SharedRuntime::reguard_yellow_pages()) | |
1598 (void) JavaThread::current()->reguard_stack(); | |
1599 JRT_END | |
1600 | |
1601 | |
1602 // Handles the uncommon case in locking, i.e., contention or an inflated lock. | |
1603 #ifndef PRODUCT | |
1604 int SharedRuntime::_monitor_enter_ctr=0; | |
1605 #endif | |
1606 JRT_ENTRY_NO_ASYNC(void, SharedRuntime::complete_monitor_locking_C(oopDesc* _obj, BasicLock* lock, JavaThread* thread)) | |
1607 oop obj(_obj); | |
1608 #ifndef PRODUCT | |
1609 _monitor_enter_ctr++; // monitor enter slow | |
1610 #endif | |
1611 if (PrintBiasedLockingStatistics) { | |
1612 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); | |
1613 } | |
1614 Handle h_obj(THREAD, obj); | |
1615 if (UseBiasedLocking) { | |
1616 // Retry fast entry if bias is revoked to avoid unnecessary inflation | |
1617 ObjectSynchronizer::fast_enter(h_obj, lock, true, CHECK); | |
1618 } else { | |
1619 ObjectSynchronizer::slow_enter(h_obj, lock, CHECK); | |
1620 } | |
1621 assert(!HAS_PENDING_EXCEPTION, "Should have no exception here"); | |
1622 JRT_END | |
1623 | |
1624 #ifndef PRODUCT | |
1625 int SharedRuntime::_monitor_exit_ctr=0; | |
1626 #endif | |
1627 // Handles the uncommon cases of monitor unlocking in compiled code | |
1628 JRT_LEAF(void, SharedRuntime::complete_monitor_unlocking_C(oopDesc* _obj, BasicLock* lock)) | |
1629 oop obj(_obj); | |
1630 #ifndef PRODUCT | |
1631 _monitor_exit_ctr++; // monitor exit slow | |
1632 #endif | |
1633 Thread* THREAD = JavaThread::current(); | |
1634 // I'm not convinced we need the code contained by MIGHT_HAVE_PENDING anymore | |
1635 // testing was unable to ever fire the assert that guarded it so I have removed it. | |
1636 assert(!HAS_PENDING_EXCEPTION, "Do we need code below anymore?"); | |
1637 #undef MIGHT_HAVE_PENDING | |
1638 #ifdef MIGHT_HAVE_PENDING | |
1639 // Save and restore any pending_exception around the exception mark. | |
1640 // While the slow_exit must not throw an exception, we could come into | |
1641 // this routine with one set. | |
1642 oop pending_excep = NULL; | |
1643 const char* pending_file; | |
1644 int pending_line; | |
1645 if (HAS_PENDING_EXCEPTION) { | |
1646 pending_excep = PENDING_EXCEPTION; | |
1647 pending_file = THREAD->exception_file(); | |
1648 pending_line = THREAD->exception_line(); | |
1649 CLEAR_PENDING_EXCEPTION; | |
1650 } | |
1651 #endif /* MIGHT_HAVE_PENDING */ | |
1652 | |
1653 { | |
1654 // Exit must be non-blocking, and therefore no exceptions can be thrown. | |
1655 EXCEPTION_MARK; | |
1656 ObjectSynchronizer::slow_exit(obj, lock, THREAD); | |
1657 } | |
1658 | |
1659 #ifdef MIGHT_HAVE_PENDING | |
1660 if (pending_excep != NULL) { | |
1661 THREAD->set_pending_exception(pending_excep, pending_file, pending_line); | |
1662 } | |
1663 #endif /* MIGHT_HAVE_PENDING */ | |
1664 JRT_END | |
1665 | |
1666 #ifndef PRODUCT | |
1667 | |
1668 void SharedRuntime::print_statistics() { | |
1669 ttyLocker ttyl; | |
1670 if (xtty != NULL) xtty->head("statistics type='SharedRuntime'"); | |
1671 | |
1672 if (_monitor_enter_ctr ) tty->print_cr("%5d monitor enter slow", _monitor_enter_ctr); | |
1673 if (_monitor_exit_ctr ) tty->print_cr("%5d monitor exit slow", _monitor_exit_ctr); | |
1674 if (_throw_null_ctr) tty->print_cr("%5d implicit null throw", _throw_null_ctr); | |
1675 | |
1676 SharedRuntime::print_ic_miss_histogram(); | |
1677 | |
1678 if (CountRemovableExceptions) { | |
1679 if (_nof_removable_exceptions > 0) { | |
1680 Unimplemented(); // this counter is not yet incremented | |
1681 tty->print_cr("Removable exceptions: %d", _nof_removable_exceptions); | |
1682 } | |
1683 } | |
1684 | |
1685 // Dump the JRT_ENTRY counters | |
1686 if( _new_instance_ctr ) tty->print_cr("%5d new instance requires GC", _new_instance_ctr); | |
1687 if( _new_array_ctr ) tty->print_cr("%5d new array requires GC", _new_array_ctr); | |
1688 if( _multi1_ctr ) tty->print_cr("%5d multianewarray 1 dim", _multi1_ctr); | |
1689 if( _multi2_ctr ) tty->print_cr("%5d multianewarray 2 dim", _multi2_ctr); | |
1690 if( _multi3_ctr ) tty->print_cr("%5d multianewarray 3 dim", _multi3_ctr); | |
1691 if( _multi4_ctr ) tty->print_cr("%5d multianewarray 4 dim", _multi4_ctr); | |
1692 if( _multi5_ctr ) tty->print_cr("%5d multianewarray 5 dim", _multi5_ctr); | |
1693 | |
1694 tty->print_cr("%5d inline cache miss in compiled", _ic_miss_ctr ); | |
1695 tty->print_cr("%5d wrong method", _wrong_method_ctr ); | |
1696 tty->print_cr("%5d unresolved static call site", _resolve_static_ctr ); | |
1697 tty->print_cr("%5d unresolved virtual call site", _resolve_virtual_ctr ); | |
1698 tty->print_cr("%5d unresolved opt virtual call site", _resolve_opt_virtual_ctr ); | |
1699 | |
1700 if( _mon_enter_stub_ctr ) tty->print_cr("%5d monitor enter stub", _mon_enter_stub_ctr ); | |
1701 if( _mon_exit_stub_ctr ) tty->print_cr("%5d monitor exit stub", _mon_exit_stub_ctr ); | |
1702 if( _mon_enter_ctr ) tty->print_cr("%5d monitor enter slow", _mon_enter_ctr ); | |
1703 if( _mon_exit_ctr ) tty->print_cr("%5d monitor exit slow", _mon_exit_ctr ); | |
1704 if( _partial_subtype_ctr) tty->print_cr("%5d slow partial subtype", _partial_subtype_ctr ); | |
1705 if( _jbyte_array_copy_ctr ) tty->print_cr("%5d byte array copies", _jbyte_array_copy_ctr ); | |
1706 if( _jshort_array_copy_ctr ) tty->print_cr("%5d short array copies", _jshort_array_copy_ctr ); | |
1707 if( _jint_array_copy_ctr ) tty->print_cr("%5d int array copies", _jint_array_copy_ctr ); | |
1708 if( _jlong_array_copy_ctr ) tty->print_cr("%5d long array copies", _jlong_array_copy_ctr ); | |
1709 if( _oop_array_copy_ctr ) tty->print_cr("%5d oop array copies", _oop_array_copy_ctr ); | |
1710 if( _checkcast_array_copy_ctr ) tty->print_cr("%5d checkcast array copies", _checkcast_array_copy_ctr ); | |
1711 if( _unsafe_array_copy_ctr ) tty->print_cr("%5d unsafe array copies", _unsafe_array_copy_ctr ); | |
1712 if( _generic_array_copy_ctr ) tty->print_cr("%5d generic array copies", _generic_array_copy_ctr ); | |
1713 if( _slow_array_copy_ctr ) tty->print_cr("%5d slow array copies", _slow_array_copy_ctr ); | |
1714 if( _find_handler_ctr ) tty->print_cr("%5d find exception handler", _find_handler_ctr ); | |
1715 if( _rethrow_ctr ) tty->print_cr("%5d rethrow handler", _rethrow_ctr ); | |
1716 | |
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1717 AdapterHandlerLibrary::print_statistics(); |
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1718 |
0 | 1719 if (xtty != NULL) xtty->tail("statistics"); |
1720 } | |
1721 | |
1722 inline double percent(int x, int y) { | |
1723 return 100.0 * x / MAX2(y, 1); | |
1724 } | |
1725 | |
1726 class MethodArityHistogram { | |
1727 public: | |
1728 enum { MAX_ARITY = 256 }; | |
1729 private: | |
1730 static int _arity_histogram[MAX_ARITY]; // histogram of #args | |
1731 static int _size_histogram[MAX_ARITY]; // histogram of arg size in words | |
1732 static int _max_arity; // max. arity seen | |
1733 static int _max_size; // max. arg size seen | |
1734 | |
1735 static void add_method_to_histogram(nmethod* nm) { | |
1736 methodOop m = nm->method(); | |
1737 ArgumentCount args(m->signature()); | |
1738 int arity = args.size() + (m->is_static() ? 0 : 1); | |
1739 int argsize = m->size_of_parameters(); | |
1740 arity = MIN2(arity, MAX_ARITY-1); | |
1741 argsize = MIN2(argsize, MAX_ARITY-1); | |
1742 int count = nm->method()->compiled_invocation_count(); | |
1743 _arity_histogram[arity] += count; | |
1744 _size_histogram[argsize] += count; | |
1745 _max_arity = MAX2(_max_arity, arity); | |
1746 _max_size = MAX2(_max_size, argsize); | |
1747 } | |
1748 | |
1749 void print_histogram_helper(int n, int* histo, const char* name) { | |
1750 const int N = MIN2(5, n); | |
1751 tty->print_cr("\nHistogram of call arity (incl. rcvr, calls to compiled methods only):"); | |
1752 double sum = 0; | |
1753 double weighted_sum = 0; | |
1754 int i; | |
1755 for (i = 0; i <= n; i++) { sum += histo[i]; weighted_sum += i*histo[i]; } | |
1756 double rest = sum; | |
1757 double percent = sum / 100; | |
1758 for (i = 0; i <= N; i++) { | |
1759 rest -= histo[i]; | |
1760 tty->print_cr("%4d: %7d (%5.1f%%)", i, histo[i], histo[i] / percent); | |
1761 } | |
1762 tty->print_cr("rest: %7d (%5.1f%%))", (int)rest, rest / percent); | |
1763 tty->print_cr("(avg. %s = %3.1f, max = %d)", name, weighted_sum / sum, n); | |
1764 } | |
1765 | |
1766 void print_histogram() { | |
1767 tty->print_cr("\nHistogram of call arity (incl. rcvr, calls to compiled methods only):"); | |
1768 print_histogram_helper(_max_arity, _arity_histogram, "arity"); | |
1769 tty->print_cr("\nSame for parameter size (in words):"); | |
1770 print_histogram_helper(_max_size, _size_histogram, "size"); | |
1771 tty->cr(); | |
1772 } | |
1773 | |
1774 public: | |
1775 MethodArityHistogram() { | |
1776 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
1777 _max_arity = _max_size = 0; | |
1778 for (int i = 0; i < MAX_ARITY; i++) _arity_histogram[i] = _size_histogram [i] = 0; | |
1779 CodeCache::nmethods_do(add_method_to_histogram); | |
1780 print_histogram(); | |
1781 } | |
1782 }; | |
1783 | |
1784 int MethodArityHistogram::_arity_histogram[MethodArityHistogram::MAX_ARITY]; | |
1785 int MethodArityHistogram::_size_histogram[MethodArityHistogram::MAX_ARITY]; | |
1786 int MethodArityHistogram::_max_arity; | |
1787 int MethodArityHistogram::_max_size; | |
1788 | |
1789 void SharedRuntime::print_call_statistics(int comp_total) { | |
1790 tty->print_cr("Calls from compiled code:"); | |
1791 int total = _nof_normal_calls + _nof_interface_calls + _nof_static_calls; | |
1792 int mono_c = _nof_normal_calls - _nof_optimized_calls - _nof_megamorphic_calls; | |
1793 int mono_i = _nof_interface_calls - _nof_optimized_interface_calls - _nof_megamorphic_interface_calls; | |
1794 tty->print_cr("\t%9d (%4.1f%%) total non-inlined ", total, percent(total, total)); | |
1795 tty->print_cr("\t%9d (%4.1f%%) virtual calls ", _nof_normal_calls, percent(_nof_normal_calls, total)); | |
1796 tty->print_cr("\t %9d (%3.0f%%) inlined ", _nof_inlined_calls, percent(_nof_inlined_calls, _nof_normal_calls)); | |
1797 tty->print_cr("\t %9d (%3.0f%%) optimized ", _nof_optimized_calls, percent(_nof_optimized_calls, _nof_normal_calls)); | |
1798 tty->print_cr("\t %9d (%3.0f%%) monomorphic ", mono_c, percent(mono_c, _nof_normal_calls)); | |
1799 tty->print_cr("\t %9d (%3.0f%%) megamorphic ", _nof_megamorphic_calls, percent(_nof_megamorphic_calls, _nof_normal_calls)); | |
1800 tty->print_cr("\t%9d (%4.1f%%) interface calls ", _nof_interface_calls, percent(_nof_interface_calls, total)); | |
1801 tty->print_cr("\t %9d (%3.0f%%) inlined ", _nof_inlined_interface_calls, percent(_nof_inlined_interface_calls, _nof_interface_calls)); | |
1802 tty->print_cr("\t %9d (%3.0f%%) optimized ", _nof_optimized_interface_calls, percent(_nof_optimized_interface_calls, _nof_interface_calls)); | |
1803 tty->print_cr("\t %9d (%3.0f%%) monomorphic ", mono_i, percent(mono_i, _nof_interface_calls)); | |
1804 tty->print_cr("\t %9d (%3.0f%%) megamorphic ", _nof_megamorphic_interface_calls, percent(_nof_megamorphic_interface_calls, _nof_interface_calls)); | |
1805 tty->print_cr("\t%9d (%4.1f%%) static/special calls", _nof_static_calls, percent(_nof_static_calls, total)); | |
1806 tty->print_cr("\t %9d (%3.0f%%) inlined ", _nof_inlined_static_calls, percent(_nof_inlined_static_calls, _nof_static_calls)); | |
1807 tty->cr(); | |
1808 tty->print_cr("Note 1: counter updates are not MT-safe."); | |
1809 tty->print_cr("Note 2: %% in major categories are relative to total non-inlined calls;"); | |
1810 tty->print_cr(" %% in nested categories are relative to their category"); | |
1811 tty->print_cr(" (and thus add up to more than 100%% with inlining)"); | |
1812 tty->cr(); | |
1813 | |
1814 MethodArityHistogram h; | |
1815 } | |
1816 #endif | |
1817 | |
1818 | |
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1819 // A simple wrapper class around the calling convention information |
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1820 // that allows sharing of adapters for the same calling convention. |
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1821 class AdapterFingerPrint : public CHeapObj { |
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1822 private: |
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1823 union { |
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1824 int _compact[3]; |
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1825 int* _fingerprint; |
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1826 } _value; |
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1827 int _length; // A negative length indicates the fingerprint is in the compact form, |
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1828 // Otherwise _value._fingerprint is the array. |
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1829 |
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1830 // Remap BasicTypes that are handled equivalently by the adapters. |
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1831 // These are correct for the current system but someday it might be |
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1832 // necessary to make this mapping platform dependent. |
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1833 static BasicType adapter_encoding(BasicType in) { |
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1834 assert((~0xf & in) == 0, "must fit in 4 bits"); |
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1835 switch(in) { |
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1836 case T_BOOLEAN: |
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1837 case T_BYTE: |
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1838 case T_SHORT: |
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1839 case T_CHAR: |
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1840 // There are all promoted to T_INT in the calling convention |
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1841 return T_INT; |
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1842 |
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1843 case T_OBJECT: |
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1844 case T_ARRAY: |
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1845 #ifdef _LP64 |
1506 | 1846 return T_LONG; |
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1847 #else |
1506 | 1848 return T_INT; |
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1849 #endif |
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1850 |
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1851 case T_INT: |
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1852 case T_LONG: |
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1853 case T_FLOAT: |
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1854 case T_DOUBLE: |
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1855 case T_VOID: |
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1856 return in; |
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1857 |
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1858 default: |
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1859 ShouldNotReachHere(); |
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1860 return T_CONFLICT; |
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1861 } |
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1862 } |
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1863 |
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1864 public: |
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1865 AdapterFingerPrint(int total_args_passed, BasicType* sig_bt) { |
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1866 // The fingerprint is based on the BasicType signature encoded |
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1867 // into an array of ints with four entries per int. |
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1868 int* ptr; |
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1869 int len = (total_args_passed + 3) >> 2; |
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1870 if (len <= (int)(sizeof(_value._compact) / sizeof(int))) { |
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1871 _value._compact[0] = _value._compact[1] = _value._compact[2] = 0; |
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1872 // Storing the signature encoded as signed chars hits about 98% |
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1873 // of the time. |
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1874 _length = -len; |
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1875 ptr = _value._compact; |
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1876 } else { |
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1877 _length = len; |
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1878 _value._fingerprint = NEW_C_HEAP_ARRAY(int, _length); |
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1879 ptr = _value._fingerprint; |
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1880 } |
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1881 |
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1882 // Now pack the BasicTypes with 4 per int |
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1883 int sig_index = 0; |
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1884 for (int index = 0; index < len; index++) { |
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1885 int value = 0; |
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1886 for (int byte = 0; byte < 4; byte++) { |
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1887 if (sig_index < total_args_passed) { |
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1888 value = (value << 4) | adapter_encoding(sig_bt[sig_index++]); |
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1889 } |
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1890 } |
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1891 ptr[index] = value; |
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1892 } |
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1893 } |
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1894 |
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1895 ~AdapterFingerPrint() { |
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1896 if (_length > 0) { |
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1897 FREE_C_HEAP_ARRAY(int, _value._fingerprint); |
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1898 } |
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1899 } |
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1900 |
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1901 int value(int index) { |
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1902 if (_length < 0) { |
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1903 return _value._compact[index]; |
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1904 } |
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1905 return _value._fingerprint[index]; |
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1906 } |
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1907 int length() { |
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1908 if (_length < 0) return -_length; |
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1909 return _length; |
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1910 } |
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1911 |
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1912 bool is_compact() { |
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1913 return _length <= 0; |
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1914 } |
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1915 |
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1916 unsigned int compute_hash() { |
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1917 int hash = 0; |
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1918 for (int i = 0; i < length(); i++) { |
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1919 int v = value(i); |
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1920 hash = (hash << 8) ^ v ^ (hash >> 5); |
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1921 } |
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1922 return (unsigned int)hash; |
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1923 } |
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1924 |
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1925 const char* as_string() { |
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1926 stringStream st; |
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1927 for (int i = 0; i < length(); i++) { |
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1928 st.print(PTR_FORMAT, value(i)); |
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1929 } |
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1930 return st.as_string(); |
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1931 } |
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1932 |
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1933 bool equals(AdapterFingerPrint* other) { |
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1934 if (other->_length != _length) { |
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1935 return false; |
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1936 } |
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1937 if (_length < 0) { |
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1938 return _value._compact[0] == other->_value._compact[0] && |
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1939 _value._compact[1] == other->_value._compact[1] && |
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1940 _value._compact[2] == other->_value._compact[2]; |
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1941 } else { |
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1942 for (int i = 0; i < _length; i++) { |
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1943 if (_value._fingerprint[i] != other->_value._fingerprint[i]) { |
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1944 return false; |
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1945 } |
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1946 } |
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1947 } |
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1948 return true; |
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1949 } |
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1950 }; |
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1951 |
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1952 |
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1953 // A hashtable mapping from AdapterFingerPrints to AdapterHandlerEntries |
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1954 class AdapterHandlerTable : public BasicHashtable { |
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1955 friend class AdapterHandlerTableIterator; |
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1956 |
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1957 private: |
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1958 |
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1959 #ifndef PRODUCT |
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1960 static int _lookups; // number of calls to lookup |
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1961 static int _buckets; // number of buckets checked |
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1962 static int _equals; // number of buckets checked with matching hash |
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1963 static int _hits; // number of successful lookups |
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1964 static int _compact; // number of equals calls with compact signature |
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1965 #endif |
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1966 |
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1967 AdapterHandlerEntry* bucket(int i) { |
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1968 return (AdapterHandlerEntry*)BasicHashtable::bucket(i); |
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1969 } |
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1970 |
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1971 public: |
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1972 AdapterHandlerTable() |
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1973 : BasicHashtable(293, sizeof(AdapterHandlerEntry)) { } |
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1974 |
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1975 // Create a new entry suitable for insertion in the table |
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1976 AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_unverified_entry) { |
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1977 AdapterHandlerEntry* entry = (AdapterHandlerEntry*)BasicHashtable::new_entry(fingerprint->compute_hash()); |
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1978 entry->init(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry); |
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1979 return entry; |
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1980 } |
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1981 |
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1982 // Insert an entry into the table |
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1983 void add(AdapterHandlerEntry* entry) { |
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1984 int index = hash_to_index(entry->hash()); |
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1985 add_entry(index, entry); |
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1986 } |
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|
1987 |
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1988 void free_entry(AdapterHandlerEntry* entry) { |
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1989 entry->deallocate(); |
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1990 BasicHashtable::free_entry(entry); |
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1991 } |
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|
1992 |
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1993 // Find a entry with the same fingerprint if it exists |
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1994 AdapterHandlerEntry* lookup(int total_args_passed, BasicType* sig_bt) { |
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1995 NOT_PRODUCT(_lookups++); |
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1996 AdapterFingerPrint fp(total_args_passed, sig_bt); |
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1997 unsigned int hash = fp.compute_hash(); |
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1998 int index = hash_to_index(hash); |
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1999 for (AdapterHandlerEntry* e = bucket(index); e != NULL; e = e->next()) { |
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2000 NOT_PRODUCT(_buckets++); |
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2001 if (e->hash() == hash) { |
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2002 NOT_PRODUCT(_equals++); |
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2003 if (fp.equals(e->fingerprint())) { |
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2004 #ifndef PRODUCT |
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2005 if (fp.is_compact()) _compact++; |
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2006 _hits++; |
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2007 #endif |
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2008 return e; |
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|
2009 } |
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2010 } |
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|
2011 } |
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2012 return NULL; |
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|
2013 } |
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|
2014 |
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2015 #ifndef PRODUCT |
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|
2016 void print_statistics() { |
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|
2017 ResourceMark rm; |
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|
2018 int longest = 0; |
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2019 int empty = 0; |
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2020 int total = 0; |
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2021 int nonempty = 0; |
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|
2022 for (int index = 0; index < table_size(); index++) { |
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|
2023 int count = 0; |
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|
2024 for (AdapterHandlerEntry* e = bucket(index); e != NULL; e = e->next()) { |
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2025 count++; |
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|
2026 } |
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|
2027 if (count != 0) nonempty++; |
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|
2028 if (count == 0) empty++; |
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|
2029 if (count > longest) longest = count; |
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|
2030 total += count; |
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|
2031 } |
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|
2032 tty->print_cr("AdapterHandlerTable: empty %d longest %d total %d average %f", |
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2033 empty, longest, total, total / (double)nonempty); |
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2034 tty->print_cr("AdapterHandlerTable: lookups %d buckets %d equals %d hits %d compact %d", |
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2035 _lookups, _buckets, _equals, _hits, _compact); |
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2036 } |
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2037 #endif |
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2038 }; |
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|
2039 |
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2040 |
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2041 #ifndef PRODUCT |
1187
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2042 |
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2043 int AdapterHandlerTable::_lookups; |
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2044 int AdapterHandlerTable::_buckets; |
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2045 int AdapterHandlerTable::_equals; |
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2046 int AdapterHandlerTable::_hits; |
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2047 int AdapterHandlerTable::_compact; |
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2048 |
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2049 class AdapterHandlerTableIterator : public StackObj { |
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2050 private: |
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2051 AdapterHandlerTable* _table; |
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2052 int _index; |
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2053 AdapterHandlerEntry* _current; |
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|
2054 |
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2055 void scan() { |
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2056 while (_index < _table->table_size()) { |
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2057 AdapterHandlerEntry* a = _table->bucket(_index); |
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2058 if (a != NULL) { |
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2059 _current = a; |
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2060 return; |
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|
2061 } |
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2062 _index++; |
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2063 } |
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2064 } |
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|
2065 |
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2066 public: |
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2067 AdapterHandlerTableIterator(AdapterHandlerTable* table): _table(table), _index(0), _current(NULL) { |
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2068 scan(); |
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2069 } |
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2070 bool has_next() { |
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2071 return _current != NULL; |
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2072 } |
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2073 AdapterHandlerEntry* next() { |
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2074 if (_current != NULL) { |
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2075 AdapterHandlerEntry* result = _current; |
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2076 _current = _current->next(); |
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2077 if (_current == NULL) scan(); |
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2078 return result; |
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2079 } else { |
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2080 return NULL; |
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|
2081 } |
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|
2082 } |
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2083 }; |
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|
2084 #endif |
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|
2085 |
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|
2086 |
0 | 2087 // --------------------------------------------------------------------------- |
2088 // Implementation of AdapterHandlerLibrary | |
1187
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2089 AdapterHandlerTable* AdapterHandlerLibrary::_adapters = NULL; |
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2090 AdapterHandlerEntry* AdapterHandlerLibrary::_abstract_method_handler = NULL; |
0 | 2091 const int AdapterHandlerLibrary_size = 16*K; |
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2092 BufferBlob* AdapterHandlerLibrary::_buffer = NULL; |
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2093 |
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2094 BufferBlob* AdapterHandlerLibrary::buffer_blob() { |
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2095 // Should be called only when AdapterHandlerLibrary_lock is active. |
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2096 if (_buffer == NULL) // Initialize lazily |
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2097 _buffer = BufferBlob::create("adapters", AdapterHandlerLibrary_size); |
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2098 return _buffer; |
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2099 } |
0 | 2100 |
2101 void AdapterHandlerLibrary::initialize() { | |
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2102 if (_adapters != NULL) return; |
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2103 _adapters = new AdapterHandlerTable(); |
0 | 2104 |
2105 // Create a special handler for abstract methods. Abstract methods | |
2106 // are never compiled so an i2c entry is somewhat meaningless, but | |
2107 // fill it in with something appropriate just in case. Pass handle | |
2108 // wrong method for the c2i transitions. | |
2109 address wrong_method = SharedRuntime::get_handle_wrong_method_stub(); | |
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2110 _abstract_method_handler = AdapterHandlerLibrary::new_entry(new AdapterFingerPrint(0, NULL), |
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2111 StubRoutines::throw_AbstractMethodError_entry(), |
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|
2112 wrong_method, wrong_method); |
0 | 2113 } |
2114 | |
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2115 AdapterHandlerEntry* AdapterHandlerLibrary::new_entry(AdapterFingerPrint* fingerprint, |
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2116 address i2c_entry, |
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|
2117 address c2i_entry, |
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|
2118 address c2i_unverified_entry) { |
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2119 return _adapters->new_entry(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry); |
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2120 } |
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|
2121 |
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2122 AdapterHandlerEntry* AdapterHandlerLibrary::get_adapter(methodHandle method) { |
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2123 // Use customized signature handler. Need to lock around updates to |
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2124 // the AdapterHandlerTable (it is not safe for concurrent readers |
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2125 // and a single writer: this could be fixed if it becomes a |
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2126 // problem). |
0 | 2127 |
2128 // Get the address of the ic_miss handlers before we grab the | |
2129 // AdapterHandlerLibrary_lock. This fixes bug 6236259 which | |
2130 // was caused by the initialization of the stubs happening | |
2131 // while we held the lock and then notifying jvmti while | |
2132 // holding it. This just forces the initialization to be a little | |
2133 // earlier. | |
2134 address ic_miss = SharedRuntime::get_ic_miss_stub(); | |
2135 assert(ic_miss != NULL, "must have handler"); | |
2136 | |
1187
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|
2137 ResourceMark rm; |
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|
2138 |
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2139 NOT_PRODUCT(int code_size); |
1299
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2140 AdapterBlob* B = NULL; |
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2141 AdapterHandlerEntry* entry = NULL; |
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|
2142 AdapterFingerPrint* fingerprint = NULL; |
0 | 2143 { |
2144 MutexLocker mu(AdapterHandlerLibrary_lock); | |
2145 // make sure data structure is initialized | |
2146 initialize(); | |
2147 | |
2148 if (method->is_abstract()) { | |
1187
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2149 return _abstract_method_handler; |
0 | 2150 } |
2151 | |
1187
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2152 // Fill in the signature array, for the calling-convention call. |
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2153 int total_args_passed = method->size_of_parameters(); // All args on stack |
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|
2154 |
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|
2155 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed); |
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|
2156 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed); |
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2157 int i = 0; |
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|
2158 if (!method->is_static()) // Pass in receiver first |
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|
2159 sig_bt[i++] = T_OBJECT; |
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|
2160 for (SignatureStream ss(method->signature()); !ss.at_return_type(); ss.next()) { |
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|
2161 sig_bt[i++] = ss.type(); // Collect remaining bits of signature |
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2162 if (ss.type() == T_LONG || ss.type() == T_DOUBLE) |
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|
2163 sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
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|
2164 } |
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|
2165 assert(i == total_args_passed, ""); |
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|
2166 |
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2167 // Lookup method signature's fingerprint |
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|
2168 entry = _adapters->lookup(total_args_passed, sig_bt); |
1187
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2169 |
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|
2170 #ifdef ASSERT |
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|
2171 AdapterHandlerEntry* shared_entry = NULL; |
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|
2172 if (VerifyAdapterSharing && entry != NULL) { |
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|
2173 shared_entry = entry; |
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|
2174 entry = NULL; |
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|
2175 } |
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|
2176 #endif |
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|
2177 |
1187
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2178 if (entry != NULL) { |
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2179 return entry; |
0 | 2180 } |
2181 | |
1207
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|
2182 // Get a description of the compiled java calling convention and the largest used (VMReg) stack slot usage |
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|
2183 int comp_args_on_stack = SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed, false); |
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|
2184 |
1187
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2185 // Make a C heap allocated version of the fingerprint to store in the adapter |
1207
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|
2186 fingerprint = new AdapterFingerPrint(total_args_passed, sig_bt); |
1187
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|
2187 |
0 | 2188 // Create I2C & C2I handlers |
2189 | |
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2190 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
742
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2191 if (buf != NULL) { |
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2192 CodeBuffer buffer(buf->instructions_begin(), buf->instructions_size()); |
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2193 short buffer_locs[20]; |
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2194 buffer.insts()->initialize_shared_locs((relocInfo*)buffer_locs, |
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2195 sizeof(buffer_locs)/sizeof(relocInfo)); |
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2196 MacroAssembler _masm(&buffer); |
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2197 |
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2198 entry = SharedRuntime::generate_i2c2i_adapters(&_masm, |
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2199 total_args_passed, |
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2200 comp_args_on_stack, |
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2201 sig_bt, |
1187
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2202 regs, |
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2203 fingerprint); |
0 | 2204 |
1207
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2205 #ifdef ASSERT |
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2206 if (VerifyAdapterSharing) { |
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2207 if (shared_entry != NULL) { |
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2208 assert(shared_entry->compare_code(buf->instructions_begin(), buffer.code_size(), total_args_passed, sig_bt), |
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2209 "code must match"); |
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2210 // Release the one just created and return the original |
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2211 _adapters->free_entry(entry); |
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2212 return shared_entry; |
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2213 } else { |
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2214 entry->save_code(buf->instructions_begin(), buffer.code_size(), total_args_passed, sig_bt); |
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2215 } |
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2216 } |
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2217 #endif |
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2218 |
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2219 B = AdapterBlob::create(&buffer); |
742
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2220 NOT_PRODUCT(code_size = buffer.code_size()); |
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2221 } |
28 | 2222 if (B == NULL) { |
2223 // CodeCache is full, disable compilation | |
2224 // Ought to log this but compile log is only per compile thread | |
2225 // and we're some non descript Java thread. | |
1202 | 2226 MutexUnlocker mu(AdapterHandlerLibrary_lock); |
2227 CompileBroker::handle_full_code_cache(); | |
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2228 return NULL; // Out of CodeCache space |
28 | 2229 } |
0 | 2230 entry->relocate(B->instructions_begin()); |
2231 #ifndef PRODUCT | |
2232 // debugging suppport | |
2233 if (PrintAdapterHandlers) { | |
2234 tty->cr(); | |
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2235 tty->print_cr("i2c argument handler #%d for: %s %s (fingerprint = %s, %d bytes generated)", |
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2236 _adapters->number_of_entries(), (method->is_static() ? "static" : "receiver"), |
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2237 method->signature()->as_C_string(), fingerprint->as_string(), code_size ); |
0 | 2238 tty->print_cr("c2i argument handler starts at %p",entry->get_c2i_entry()); |
742
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2239 Disassembler::decode(entry->get_i2c_entry(), entry->get_i2c_entry() + code_size); |
0 | 2240 } |
2241 #endif | |
2242 | |
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2243 _adapters->add(entry); |
0 | 2244 } |
2245 // Outside of the lock | |
2246 if (B != NULL) { | |
2247 char blob_id[256]; | |
2248 jio_snprintf(blob_id, | |
2249 sizeof(blob_id), | |
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2250 "%s(%s)@" PTR_FORMAT, |
1299
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2251 B->name(), |
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2252 fingerprint->as_string(), |
0 | 2253 B->instructions_begin()); |
2254 VTune::register_stub(blob_id, B->instructions_begin(), B->instructions_end()); | |
2255 Forte::register_stub(blob_id, B->instructions_begin(), B->instructions_end()); | |
2256 | |
2257 if (JvmtiExport::should_post_dynamic_code_generated()) { | |
2258 JvmtiExport::post_dynamic_code_generated(blob_id, | |
2259 B->instructions_begin(), | |
2260 B->instructions_end()); | |
2261 } | |
2262 } | |
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2263 return entry; |
0 | 2264 } |
2265 | |
2266 void AdapterHandlerEntry::relocate(address new_base) { | |
2267 ptrdiff_t delta = new_base - _i2c_entry; | |
2268 _i2c_entry += delta; | |
2269 _c2i_entry += delta; | |
2270 _c2i_unverified_entry += delta; | |
2271 } | |
2272 | |
1207
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2273 |
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2274 void AdapterHandlerEntry::deallocate() { |
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2275 delete _fingerprint; |
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2276 #ifdef ASSERT |
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2277 if (_saved_code) FREE_C_HEAP_ARRAY(unsigned char, _saved_code); |
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2278 if (_saved_sig) FREE_C_HEAP_ARRAY(Basictype, _saved_sig); |
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2279 #endif |
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2280 } |
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2281 |
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2282 |
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2283 #ifdef ASSERT |
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2284 // Capture the code before relocation so that it can be compared |
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2285 // against other versions. If the code is captured after relocation |
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2286 // then relative instructions won't be equivalent. |
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2287 void AdapterHandlerEntry::save_code(unsigned char* buffer, int length, int total_args_passed, BasicType* sig_bt) { |
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2288 _saved_code = NEW_C_HEAP_ARRAY(unsigned char, length); |
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2289 _code_length = length; |
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2290 memcpy(_saved_code, buffer, length); |
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2291 _total_args_passed = total_args_passed; |
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2292 _saved_sig = NEW_C_HEAP_ARRAY(BasicType, _total_args_passed); |
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2293 memcpy(_saved_sig, sig_bt, _total_args_passed * sizeof(BasicType)); |
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2294 } |
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2295 |
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2296 |
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2297 bool AdapterHandlerEntry::compare_code(unsigned char* buffer, int length, int total_args_passed, BasicType* sig_bt) { |
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2298 if (length != _code_length) { |
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2299 return false; |
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2300 } |
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2301 for (int i = 0; i < length; i++) { |
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2302 if (buffer[i] != _saved_code[i]) { |
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2303 return false; |
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2304 } |
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2305 } |
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2306 return true; |
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2307 } |
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2308 #endif |
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2309 |
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2310 |
0 | 2311 // Create a native wrapper for this native method. The wrapper converts the |
2312 // java compiled calling convention to the native convention, handlizes | |
2313 // arguments, and transitions to native. On return from the native we transition | |
2314 // back to java blocking if a safepoint is in progress. | |
2315 nmethod *AdapterHandlerLibrary::create_native_wrapper(methodHandle method) { | |
2316 ResourceMark rm; | |
2317 nmethod* nm = NULL; | |
2318 | |
2319 if (PrintCompilation) { | |
2320 ttyLocker ttyl; | |
2321 tty->print("--- n%s ", (method->is_synchronized() ? "s" : " ")); | |
2322 method->print_short_name(tty); | |
2323 if (method->is_static()) { | |
2324 tty->print(" (static)"); | |
2325 } | |
2326 tty->cr(); | |
2327 } | |
2328 | |
2329 assert(method->has_native_function(), "must have something valid to call!"); | |
2330 | |
2331 { | |
2332 // perform the work while holding the lock, but perform any printing outside the lock | |
2333 MutexLocker mu(AdapterHandlerLibrary_lock); | |
2334 // See if somebody beat us to it | |
2335 nm = method->code(); | |
2336 if (nm) { | |
2337 return nm; | |
2338 } | |
2339 | |
742
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2340 ResourceMark rm; |
0 | 2341 |
742
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2342 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
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2343 if (buf != NULL) { |
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2344 CodeBuffer buffer(buf->instructions_begin(), buf->instructions_size()); |
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2345 double locs_buf[20]; |
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2346 buffer.insts()->initialize_shared_locs((relocInfo*)locs_buf, sizeof(locs_buf) / sizeof(relocInfo)); |
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2347 MacroAssembler _masm(&buffer); |
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2348 |
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2349 // Fill in the signature array, for the calling-convention call. |
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2350 int total_args_passed = method->size_of_parameters(); |
0 | 2351 |
742
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2352 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType,total_args_passed); |
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2353 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair,total_args_passed); |
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2354 int i=0; |
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2355 if( !method->is_static() ) // Pass in receiver first |
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2356 sig_bt[i++] = T_OBJECT; |
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2357 SignatureStream ss(method->signature()); |
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2358 for( ; !ss.at_return_type(); ss.next()) { |
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2359 sig_bt[i++] = ss.type(); // Collect remaining bits of signature |
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2360 if( ss.type() == T_LONG || ss.type() == T_DOUBLE ) |
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2361 sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
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2362 } |
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2363 assert( i==total_args_passed, "" ); |
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2364 BasicType ret_type = ss.type(); |
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2365 |
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2366 // Now get the compiled-Java layout as input arguments |
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2367 int comp_args_on_stack; |
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2368 comp_args_on_stack = SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed, false); |
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2369 |
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2370 // Generate the compiled-to-native wrapper code |
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2371 nm = SharedRuntime::generate_native_wrapper(&_masm, |
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2372 method, |
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2373 total_args_passed, |
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2374 comp_args_on_stack, |
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2375 sig_bt,regs, |
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2376 ret_type); |
0 | 2377 } |
2378 } | |
2379 | |
2380 // Must unlock before calling set_code | |
2381 // Install the generated code. | |
2382 if (nm != NULL) { | |
2383 method->set_code(method, nm); | |
2384 nm->post_compiled_method_load_event(); | |
2385 } else { | |
2386 // CodeCache is full, disable compilation | |
2387 // Ought to log this but compile log is only per compile thread | |
2388 // and we're some non descript Java thread. | |
1202 | 2389 MutexUnlocker mu(AdapterHandlerLibrary_lock); |
2390 CompileBroker::handle_full_code_cache(); | |
0 | 2391 } |
2392 return nm; | |
2393 } | |
2394 | |
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2395 #ifdef HAVE_DTRACE_H |
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2396 // Create a dtrace nmethod for this method. The wrapper converts the |
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2397 // java compiled calling convention to the native convention, makes a dummy call |
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2398 // (actually nops for the size of the call instruction, which become a trap if |
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2399 // probe is enabled). The returns to the caller. Since this all looks like a |
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2400 // leaf no thread transition is needed. |
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2401 |
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2402 nmethod *AdapterHandlerLibrary::create_dtrace_nmethod(methodHandle method) { |
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2403 ResourceMark rm; |
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2404 nmethod* nm = NULL; |
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2405 |
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2406 if (PrintCompilation) { |
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2407 ttyLocker ttyl; |
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2408 tty->print("--- n%s "); |
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2409 method->print_short_name(tty); |
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2410 if (method->is_static()) { |
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2411 tty->print(" (static)"); |
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2412 } |
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2413 tty->cr(); |
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2414 } |
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2415 |
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2416 { |
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2417 // perform the work while holding the lock, but perform any printing |
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2418 // outside the lock |
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2419 MutexLocker mu(AdapterHandlerLibrary_lock); |
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2420 // See if somebody beat us to it |
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2421 nm = method->code(); |
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2422 if (nm) { |
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2423 return nm; |
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2424 } |
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2425 |
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2426 ResourceMark rm; |
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2427 |
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2428 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
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2429 if (buf != NULL) { |
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2430 CodeBuffer buffer(buf->instructions_begin(), buf->instructions_size()); |
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2431 // Need a few relocation entries |
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2432 double locs_buf[20]; |
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2433 buffer.insts()->initialize_shared_locs( |
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2434 (relocInfo*)locs_buf, sizeof(locs_buf) / sizeof(relocInfo)); |
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2435 MacroAssembler _masm(&buffer); |
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2436 |
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2437 // Generate the compiled-to-native wrapper code |
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2438 nm = SharedRuntime::generate_dtrace_nmethod(&_masm, method); |
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2439 } |
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2440 } |
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2441 return nm; |
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2442 } |
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2443 |
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2444 // the dtrace method needs to convert java lang string to utf8 string. |
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2445 void SharedRuntime::get_utf(oopDesc* src, address dst) { |
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2446 typeArrayOop jlsValue = java_lang_String::value(src); |
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2447 int jlsOffset = java_lang_String::offset(src); |
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2448 int jlsLen = java_lang_String::length(src); |
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2449 jchar* jlsPos = (jlsLen == 0) ? NULL : |
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2450 jlsValue->char_at_addr(jlsOffset); |
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2451 (void) UNICODE::as_utf8(jlsPos, jlsLen, (char *)dst, max_dtrace_string_size); |
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2452 } |
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2453 #endif // ndef HAVE_DTRACE_H |
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2454 |
0 | 2455 // ------------------------------------------------------------------------- |
2456 // Java-Java calling convention | |
2457 // (what you use when Java calls Java) | |
2458 | |
2459 //------------------------------name_for_receiver---------------------------------- | |
2460 // For a given signature, return the VMReg for parameter 0. | |
2461 VMReg SharedRuntime::name_for_receiver() { | |
2462 VMRegPair regs; | |
2463 BasicType sig_bt = T_OBJECT; | |
2464 (void) java_calling_convention(&sig_bt, ®s, 1, true); | |
2465 // Return argument 0 register. In the LP64 build pointers | |
2466 // take 2 registers, but the VM wants only the 'main' name. | |
2467 return regs.first(); | |
2468 } | |
2469 | |
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2470 VMRegPair *SharedRuntime::find_callee_arguments(symbolOop sig, bool has_receiver, int* arg_size) { |
0 | 2471 // This method is returning a data structure allocating as a |
2472 // ResourceObject, so do not put any ResourceMarks in here. | |
2473 char *s = sig->as_C_string(); | |
2474 int len = (int)strlen(s); | |
2475 *s++; len--; // Skip opening paren | |
2476 char *t = s+len; | |
2477 while( *(--t) != ')' ) ; // Find close paren | |
2478 | |
2479 BasicType *sig_bt = NEW_RESOURCE_ARRAY( BasicType, 256 ); | |
2480 VMRegPair *regs = NEW_RESOURCE_ARRAY( VMRegPair, 256 ); | |
2481 int cnt = 0; | |
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2482 if (has_receiver) { |
0 | 2483 sig_bt[cnt++] = T_OBJECT; // Receiver is argument 0; not in signature |
2484 } | |
2485 | |
2486 while( s < t ) { | |
2487 switch( *s++ ) { // Switch on signature character | |
2488 case 'B': sig_bt[cnt++] = T_BYTE; break; | |
2489 case 'C': sig_bt[cnt++] = T_CHAR; break; | |
2490 case 'D': sig_bt[cnt++] = T_DOUBLE; sig_bt[cnt++] = T_VOID; break; | |
2491 case 'F': sig_bt[cnt++] = T_FLOAT; break; | |
2492 case 'I': sig_bt[cnt++] = T_INT; break; | |
2493 case 'J': sig_bt[cnt++] = T_LONG; sig_bt[cnt++] = T_VOID; break; | |
2494 case 'S': sig_bt[cnt++] = T_SHORT; break; | |
2495 case 'Z': sig_bt[cnt++] = T_BOOLEAN; break; | |
2496 case 'V': sig_bt[cnt++] = T_VOID; break; | |
2497 case 'L': // Oop | |
2498 while( *s++ != ';' ) ; // Skip signature | |
2499 sig_bt[cnt++] = T_OBJECT; | |
2500 break; | |
2501 case '[': { // Array | |
2502 do { // Skip optional size | |
2503 while( *s >= '0' && *s <= '9' ) s++; | |
2504 } while( *s++ == '[' ); // Nested arrays? | |
2505 // Skip element type | |
2506 if( s[-1] == 'L' ) | |
2507 while( *s++ != ';' ) ; // Skip signature | |
2508 sig_bt[cnt++] = T_ARRAY; | |
2509 break; | |
2510 } | |
2511 default : ShouldNotReachHere(); | |
2512 } | |
2513 } | |
2514 assert( cnt < 256, "grow table size" ); | |
2515 | |
2516 int comp_args_on_stack; | |
2517 comp_args_on_stack = java_calling_convention(sig_bt, regs, cnt, true); | |
2518 | |
2519 // the calling convention doesn't count out_preserve_stack_slots so | |
2520 // we must add that in to get "true" stack offsets. | |
2521 | |
2522 if (comp_args_on_stack) { | |
2523 for (int i = 0; i < cnt; i++) { | |
2524 VMReg reg1 = regs[i].first(); | |
2525 if( reg1->is_stack()) { | |
2526 // Yuck | |
2527 reg1 = reg1->bias(out_preserve_stack_slots()); | |
2528 } | |
2529 VMReg reg2 = regs[i].second(); | |
2530 if( reg2->is_stack()) { | |
2531 // Yuck | |
2532 reg2 = reg2->bias(out_preserve_stack_slots()); | |
2533 } | |
2534 regs[i].set_pair(reg2, reg1); | |
2535 } | |
2536 } | |
2537 | |
2538 // results | |
2539 *arg_size = cnt; | |
2540 return regs; | |
2541 } | |
2542 | |
2543 // OSR Migration Code | |
2544 // | |
2545 // This code is used convert interpreter frames into compiled frames. It is | |
2546 // called from very start of a compiled OSR nmethod. A temp array is | |
2547 // allocated to hold the interesting bits of the interpreter frame. All | |
2548 // active locks are inflated to allow them to move. The displaced headers and | |
2549 // active interpeter locals are copied into the temp buffer. Then we return | |
2550 // back to the compiled code. The compiled code then pops the current | |
2551 // interpreter frame off the stack and pushes a new compiled frame. Then it | |
2552 // copies the interpreter locals and displaced headers where it wants. | |
2553 // Finally it calls back to free the temp buffer. | |
2554 // | |
2555 // All of this is done NOT at any Safepoint, nor is any safepoint or GC allowed. | |
2556 | |
2557 JRT_LEAF(intptr_t*, SharedRuntime::OSR_migration_begin( JavaThread *thread) ) | |
2558 | |
2559 #ifdef IA64 | |
2560 ShouldNotReachHere(); // NYI | |
2561 #endif /* IA64 */ | |
2562 | |
2563 // | |
2564 // This code is dependent on the memory layout of the interpreter local | |
2565 // array and the monitors. On all of our platforms the layout is identical | |
2566 // so this code is shared. If some platform lays the their arrays out | |
2567 // differently then this code could move to platform specific code or | |
2568 // the code here could be modified to copy items one at a time using | |
2569 // frame accessor methods and be platform independent. | |
2570 | |
2571 frame fr = thread->last_frame(); | |
2572 assert( fr.is_interpreted_frame(), "" ); | |
2573 assert( fr.interpreter_frame_expression_stack_size()==0, "only handle empty stacks" ); | |
2574 | |
2575 // Figure out how many monitors are active. | |
2576 int active_monitor_count = 0; | |
2577 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); | |
2578 kptr < fr.interpreter_frame_monitor_begin(); | |
2579 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { | |
2580 if( kptr->obj() != NULL ) active_monitor_count++; | |
2581 } | |
2582 | |
2583 // QQQ we could place number of active monitors in the array so that compiled code | |
2584 // could double check it. | |
2585 | |
2586 methodOop moop = fr.interpreter_frame_method(); | |
2587 int max_locals = moop->max_locals(); | |
2588 // Allocate temp buffer, 1 word per local & 2 per active monitor | |
2589 int buf_size_words = max_locals + active_monitor_count*2; | |
2590 intptr_t *buf = NEW_C_HEAP_ARRAY(intptr_t,buf_size_words); | |
2591 | |
2592 // Copy the locals. Order is preserved so that loading of longs works. | |
2593 // Since there's no GC I can copy the oops blindly. | |
2594 assert( sizeof(HeapWord)==sizeof(intptr_t), "fix this code"); | |
1506 | 2595 Copy::disjoint_words((HeapWord*)fr.interpreter_frame_local_at(max_locals-1), |
0 | 2596 (HeapWord*)&buf[0], |
2597 max_locals); | |
2598 | |
2599 // Inflate locks. Copy the displaced headers. Be careful, there can be holes. | |
2600 int i = max_locals; | |
2601 for( BasicObjectLock *kptr2 = fr.interpreter_frame_monitor_end(); | |
2602 kptr2 < fr.interpreter_frame_monitor_begin(); | |
2603 kptr2 = fr.next_monitor_in_interpreter_frame(kptr2) ) { | |
2604 if( kptr2->obj() != NULL) { // Avoid 'holes' in the monitor array | |
2605 BasicLock *lock = kptr2->lock(); | |
2606 // Inflate so the displaced header becomes position-independent | |
2607 if (lock->displaced_header()->is_unlocked()) | |
2608 ObjectSynchronizer::inflate_helper(kptr2->obj()); | |
2609 // Now the displaced header is free to move | |
2610 buf[i++] = (intptr_t)lock->displaced_header(); | |
2611 buf[i++] = (intptr_t)kptr2->obj(); | |
2612 } | |
2613 } | |
2614 assert( i - max_locals == active_monitor_count*2, "found the expected number of monitors" ); | |
2615 | |
2616 return buf; | |
2617 JRT_END | |
2618 | |
2619 JRT_LEAF(void, SharedRuntime::OSR_migration_end( intptr_t* buf) ) | |
2620 FREE_C_HEAP_ARRAY(intptr_t,buf); | |
2621 JRT_END | |
2622 | |
2623 #ifndef PRODUCT | |
2624 bool AdapterHandlerLibrary::contains(CodeBlob* b) { | |
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2625 AdapterHandlerTableIterator iter(_adapters); |
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2626 while (iter.has_next()) { |
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2627 AdapterHandlerEntry* a = iter.next(); |
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2628 if ( b == CodeCache::find_blob(a->get_i2c_entry()) ) return true; |
0 | 2629 } |
2630 return false; | |
2631 } | |
2632 | |
2633 void AdapterHandlerLibrary::print_handler(CodeBlob* b) { | |
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2634 AdapterHandlerTableIterator iter(_adapters); |
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2635 while (iter.has_next()) { |
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2636 AdapterHandlerEntry* a = iter.next(); |
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2637 if ( b == CodeCache::find_blob(a->get_i2c_entry()) ) { |
0 | 2638 tty->print("Adapter for signature: "); |
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2639 tty->print_cr("%s i2c: " INTPTR_FORMAT " c2i: " INTPTR_FORMAT " c2iUV: " INTPTR_FORMAT, |
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2640 a->fingerprint()->as_string(), |
0 | 2641 a->get_i2c_entry(), a->get_c2i_entry(), a->get_c2i_unverified_entry()); |
2642 return; | |
2643 } | |
2644 } | |
2645 assert(false, "Should have found handler"); | |
2646 } | |
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2647 |
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2648 void AdapterHandlerLibrary::print_statistics() { |
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2649 _adapters->print_statistics(); |
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parents:
1142
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changeset
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2650 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
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2651 |
0 | 2652 #endif /* PRODUCT */ |