Mercurial > hg > graal-compiler
annotate src/share/vm/runtime/sharedRuntime.cpp @ 20501:c204e2044c29
8038624: interpretedVFrame::expressions() must respect InterpreterOopMap for liveness
Reviewed-by: coleenp, minqi
author | mgronlun |
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date | Mon, 29 Sep 2014 13:12:48 +0200 |
parents | 07e01043ade7 |
children | d3f3f7677537 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/systemDictionary.hpp" | |
27 #include "classfile/vmSymbols.hpp" | |
28 #include "code/compiledIC.hpp" | |
29 #include "code/scopeDesc.hpp" | |
30 #include "code/vtableStubs.hpp" | |
31 #include "compiler/abstractCompiler.hpp" | |
32 #include "compiler/compileBroker.hpp" | |
33 #include "compiler/compilerOracle.hpp" | |
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34 #include "compiler/disassembler.hpp" |
1972 | 35 #include "interpreter/interpreter.hpp" |
36 #include "interpreter/interpreterRuntime.hpp" | |
37 #include "memory/gcLocker.inline.hpp" | |
38 #include "memory/universe.inline.hpp" | |
39 #include "oops/oop.inline.hpp" | |
40 #include "prims/forte.hpp" | |
41 #include "prims/jvmtiExport.hpp" | |
42 #include "prims/jvmtiRedefineClassesTrace.hpp" | |
43 #include "prims/methodHandles.hpp" | |
44 #include "prims/nativeLookup.hpp" | |
45 #include "runtime/arguments.hpp" | |
46 #include "runtime/biasedLocking.hpp" | |
47 #include "runtime/handles.inline.hpp" | |
48 #include "runtime/init.hpp" | |
49 #include "runtime/interfaceSupport.hpp" | |
50 #include "runtime/javaCalls.hpp" | |
51 #include "runtime/sharedRuntime.hpp" | |
52 #include "runtime/stubRoutines.hpp" | |
53 #include "runtime/vframe.hpp" | |
54 #include "runtime/vframeArray.hpp" | |
55 #include "utilities/copy.hpp" | |
56 #include "utilities/dtrace.hpp" | |
57 #include "utilities/events.hpp" | |
58 #include "utilities/hashtable.inline.hpp" | |
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59 #include "utilities/macros.hpp" |
1972 | 60 #include "utilities/xmlstream.hpp" |
61 #ifdef TARGET_ARCH_x86 | |
62 # include "nativeInst_x86.hpp" | |
63 # include "vmreg_x86.inline.hpp" | |
64 #endif | |
65 #ifdef TARGET_ARCH_sparc | |
66 # include "nativeInst_sparc.hpp" | |
67 # include "vmreg_sparc.inline.hpp" | |
68 #endif | |
69 #ifdef TARGET_ARCH_zero | |
70 # include "nativeInst_zero.hpp" | |
71 # include "vmreg_zero.inline.hpp" | |
72 #endif | |
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73 #ifdef TARGET_ARCH_arm |
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74 # include "nativeInst_arm.hpp" |
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75 # include "vmreg_arm.inline.hpp" |
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76 #endif |
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77 #ifdef TARGET_ARCH_ppc |
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78 # include "nativeInst_ppc.hpp" |
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79 # include "vmreg_ppc.inline.hpp" |
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80 #endif |
1972 | 81 #ifdef COMPILER1 |
82 #include "c1/c1_Runtime1.hpp" | |
83 #endif | |
84 | |
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85 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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86 |
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87 // Shared stub locations |
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88 RuntimeStub* SharedRuntime::_wrong_method_blob; |
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89 RuntimeStub* SharedRuntime::_wrong_method_abstract_blob; |
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90 RuntimeStub* SharedRuntime::_ic_miss_blob; |
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91 RuntimeStub* SharedRuntime::_resolve_opt_virtual_call_blob; |
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92 RuntimeStub* SharedRuntime::_resolve_virtual_call_blob; |
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93 RuntimeStub* SharedRuntime::_resolve_static_call_blob; |
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94 |
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95 DeoptimizationBlob* SharedRuntime::_deopt_blob; |
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96 SafepointBlob* SharedRuntime::_polling_page_vectors_safepoint_handler_blob; |
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97 SafepointBlob* SharedRuntime::_polling_page_safepoint_handler_blob; |
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98 SafepointBlob* SharedRuntime::_polling_page_return_handler_blob; |
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99 |
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100 #ifdef COMPILER2 |
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101 UncommonTrapBlob* SharedRuntime::_uncommon_trap_blob; |
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102 #endif // COMPILER2 |
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103 |
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104 |
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105 //----------------------------generate_stubs----------------------------------- |
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106 void SharedRuntime::generate_stubs() { |
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107 _wrong_method_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::handle_wrong_method), "wrong_method_stub"); |
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108 _wrong_method_abstract_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::handle_wrong_method_abstract), "wrong_method_abstract_stub"); |
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109 _ic_miss_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::handle_wrong_method_ic_miss), "ic_miss_stub"); |
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110 _resolve_opt_virtual_call_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::resolve_opt_virtual_call_C), "resolve_opt_virtual_call"); |
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111 _resolve_virtual_call_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::resolve_virtual_call_C), "resolve_virtual_call"); |
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112 _resolve_static_call_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::resolve_static_call_C), "resolve_static_call"); |
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113 |
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114 #ifdef COMPILER2 |
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115 // Vectors are generated only by C2. |
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116 if (is_wide_vector(MaxVectorSize)) { |
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117 _polling_page_vectors_safepoint_handler_blob = generate_handler_blob(CAST_FROM_FN_PTR(address, SafepointSynchronize::handle_polling_page_exception), POLL_AT_VECTOR_LOOP); |
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118 } |
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119 #endif // COMPILER2 |
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120 _polling_page_safepoint_handler_blob = generate_handler_blob(CAST_FROM_FN_PTR(address, SafepointSynchronize::handle_polling_page_exception), POLL_AT_LOOP); |
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121 _polling_page_return_handler_blob = generate_handler_blob(CAST_FROM_FN_PTR(address, SafepointSynchronize::handle_polling_page_exception), POLL_AT_RETURN); |
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122 |
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123 generate_deopt_blob(); |
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124 |
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125 #ifdef COMPILER2 |
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126 generate_uncommon_trap_blob(); |
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127 #endif // COMPILER2 |
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128 } |
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129 |
0 | 130 #include <math.h> |
131 | |
4006 | 132 #ifndef USDT2 |
0 | 133 HS_DTRACE_PROBE_DECL4(hotspot, object__alloc, Thread*, char*, int, size_t); |
134 HS_DTRACE_PROBE_DECL7(hotspot, method__entry, int, | |
135 char*, int, char*, int, char*, int); | |
136 HS_DTRACE_PROBE_DECL7(hotspot, method__return, int, | |
137 char*, int, char*, int, char*, int); | |
4006 | 138 #endif /* !USDT2 */ |
0 | 139 |
140 // Implementation of SharedRuntime | |
141 | |
142 #ifndef PRODUCT | |
143 // For statistics | |
144 int SharedRuntime::_ic_miss_ctr = 0; | |
145 int SharedRuntime::_wrong_method_ctr = 0; | |
146 int SharedRuntime::_resolve_static_ctr = 0; | |
147 int SharedRuntime::_resolve_virtual_ctr = 0; | |
148 int SharedRuntime::_resolve_opt_virtual_ctr = 0; | |
149 int SharedRuntime::_implicit_null_throws = 0; | |
150 int SharedRuntime::_implicit_div0_throws = 0; | |
151 int SharedRuntime::_throw_null_ctr = 0; | |
152 | |
153 int SharedRuntime::_nof_normal_calls = 0; | |
154 int SharedRuntime::_nof_optimized_calls = 0; | |
155 int SharedRuntime::_nof_inlined_calls = 0; | |
156 int SharedRuntime::_nof_megamorphic_calls = 0; | |
157 int SharedRuntime::_nof_static_calls = 0; | |
158 int SharedRuntime::_nof_inlined_static_calls = 0; | |
159 int SharedRuntime::_nof_interface_calls = 0; | |
160 int SharedRuntime::_nof_optimized_interface_calls = 0; | |
161 int SharedRuntime::_nof_inlined_interface_calls = 0; | |
162 int SharedRuntime::_nof_megamorphic_interface_calls = 0; | |
163 int SharedRuntime::_nof_removable_exceptions = 0; | |
164 | |
165 int SharedRuntime::_new_instance_ctr=0; | |
166 int SharedRuntime::_new_array_ctr=0; | |
167 int SharedRuntime::_multi1_ctr=0; | |
168 int SharedRuntime::_multi2_ctr=0; | |
169 int SharedRuntime::_multi3_ctr=0; | |
170 int SharedRuntime::_multi4_ctr=0; | |
171 int SharedRuntime::_multi5_ctr=0; | |
172 int SharedRuntime::_mon_enter_stub_ctr=0; | |
173 int SharedRuntime::_mon_exit_stub_ctr=0; | |
174 int SharedRuntime::_mon_enter_ctr=0; | |
175 int SharedRuntime::_mon_exit_ctr=0; | |
176 int SharedRuntime::_partial_subtype_ctr=0; | |
177 int SharedRuntime::_jbyte_array_copy_ctr=0; | |
178 int SharedRuntime::_jshort_array_copy_ctr=0; | |
179 int SharedRuntime::_jint_array_copy_ctr=0; | |
180 int SharedRuntime::_jlong_array_copy_ctr=0; | |
181 int SharedRuntime::_oop_array_copy_ctr=0; | |
182 int SharedRuntime::_checkcast_array_copy_ctr=0; | |
183 int SharedRuntime::_unsafe_array_copy_ctr=0; | |
184 int SharedRuntime::_generic_array_copy_ctr=0; | |
185 int SharedRuntime::_slow_array_copy_ctr=0; | |
186 int SharedRuntime::_find_handler_ctr=0; | |
187 int SharedRuntime::_rethrow_ctr=0; | |
188 | |
189 int SharedRuntime::_ICmiss_index = 0; | |
190 int SharedRuntime::_ICmiss_count[SharedRuntime::maxICmiss_count]; | |
191 address SharedRuntime::_ICmiss_at[SharedRuntime::maxICmiss_count]; | |
192 | |
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193 |
0 | 194 void SharedRuntime::trace_ic_miss(address at) { |
195 for (int i = 0; i < _ICmiss_index; i++) { | |
196 if (_ICmiss_at[i] == at) { | |
197 _ICmiss_count[i]++; | |
198 return; | |
199 } | |
200 } | |
201 int index = _ICmiss_index++; | |
202 if (_ICmiss_index >= maxICmiss_count) _ICmiss_index = maxICmiss_count - 1; | |
203 _ICmiss_at[index] = at; | |
204 _ICmiss_count[index] = 1; | |
205 } | |
206 | |
207 void SharedRuntime::print_ic_miss_histogram() { | |
208 if (ICMissHistogram) { | |
209 tty->print_cr ("IC Miss Histogram:"); | |
210 int tot_misses = 0; | |
211 for (int i = 0; i < _ICmiss_index; i++) { | |
212 tty->print_cr(" at: " INTPTR_FORMAT " nof: %d", _ICmiss_at[i], _ICmiss_count[i]); | |
213 tot_misses += _ICmiss_count[i]; | |
214 } | |
215 tty->print_cr ("Total IC misses: %7d", tot_misses); | |
216 } | |
217 } | |
218 #endif // PRODUCT | |
219 | |
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220 #if INCLUDE_ALL_GCS |
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221 |
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222 // G1 write-barrier pre: executed before a pointer store. |
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223 JRT_LEAF(void, SharedRuntime::g1_wb_pre(oopDesc* orig, JavaThread *thread)) |
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224 if (orig == NULL) { |
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225 assert(false, "should be optimized out"); |
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226 return; |
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227 } |
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228 assert(orig->is_oop(true /* ignore mark word */), "Error"); |
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229 // store the original value that was in the field reference |
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230 thread->satb_mark_queue().enqueue(orig); |
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231 JRT_END |
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232 |
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233 // G1 write-barrier post: executed after a pointer store. |
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234 JRT_LEAF(void, SharedRuntime::g1_wb_post(void* card_addr, JavaThread* thread)) |
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235 thread->dirty_card_queue().enqueue(card_addr); |
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236 JRT_END |
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237 |
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238 #endif // INCLUDE_ALL_GCS |
342
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239 |
0 | 240 |
241 JRT_LEAF(jlong, SharedRuntime::lmul(jlong y, jlong x)) | |
242 return x * y; | |
243 JRT_END | |
244 | |
245 | |
246 JRT_LEAF(jlong, SharedRuntime::ldiv(jlong y, jlong x)) | |
247 if (x == min_jlong && y == CONST64(-1)) { | |
248 return x; | |
249 } else { | |
250 return x / y; | |
251 } | |
252 JRT_END | |
253 | |
254 | |
255 JRT_LEAF(jlong, SharedRuntime::lrem(jlong y, jlong x)) | |
256 if (x == min_jlong && y == CONST64(-1)) { | |
257 return 0; | |
258 } else { | |
259 return x % y; | |
260 } | |
261 JRT_END | |
262 | |
263 | |
264 const juint float_sign_mask = 0x7FFFFFFF; | |
265 const juint float_infinity = 0x7F800000; | |
266 const julong double_sign_mask = CONST64(0x7FFFFFFFFFFFFFFF); | |
267 const julong double_infinity = CONST64(0x7FF0000000000000); | |
268 | |
269 JRT_LEAF(jfloat, SharedRuntime::frem(jfloat x, jfloat y)) | |
270 #ifdef _WIN64 | |
271 // 64-bit Windows on amd64 returns the wrong values for | |
272 // infinity operands. | |
273 union { jfloat f; juint i; } xbits, ybits; | |
274 xbits.f = x; | |
275 ybits.f = y; | |
276 // x Mod Infinity == x unless x is infinity | |
277 if ( ((xbits.i & float_sign_mask) != float_infinity) && | |
278 ((ybits.i & float_sign_mask) == float_infinity) ) { | |
279 return x; | |
280 } | |
281 #endif | |
282 return ((jfloat)fmod((double)x,(double)y)); | |
283 JRT_END | |
284 | |
285 | |
286 JRT_LEAF(jdouble, SharedRuntime::drem(jdouble x, jdouble y)) | |
287 #ifdef _WIN64 | |
288 union { jdouble d; julong l; } xbits, ybits; | |
289 xbits.d = x; | |
290 ybits.d = y; | |
291 // x Mod Infinity == x unless x is infinity | |
292 if ( ((xbits.l & double_sign_mask) != double_infinity) && | |
293 ((ybits.l & double_sign_mask) == double_infinity) ) { | |
294 return x; | |
295 } | |
296 #endif | |
297 return ((jdouble)fmod((double)x,(double)y)); | |
298 JRT_END | |
299 | |
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300 #ifdef __SOFTFP__ |
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301 JRT_LEAF(jfloat, SharedRuntime::fadd(jfloat x, jfloat y)) |
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302 return x + y; |
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303 JRT_END |
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304 |
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305 JRT_LEAF(jfloat, SharedRuntime::fsub(jfloat x, jfloat y)) |
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306 return x - y; |
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307 JRT_END |
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308 |
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309 JRT_LEAF(jfloat, SharedRuntime::fmul(jfloat x, jfloat y)) |
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310 return x * y; |
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311 JRT_END |
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312 |
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313 JRT_LEAF(jfloat, SharedRuntime::fdiv(jfloat x, jfloat y)) |
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314 return x / y; |
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315 JRT_END |
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316 |
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317 JRT_LEAF(jdouble, SharedRuntime::dadd(jdouble x, jdouble y)) |
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318 return x + y; |
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319 JRT_END |
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320 |
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321 JRT_LEAF(jdouble, SharedRuntime::dsub(jdouble x, jdouble y)) |
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322 return x - y; |
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323 JRT_END |
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324 |
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325 JRT_LEAF(jdouble, SharedRuntime::dmul(jdouble x, jdouble y)) |
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326 return x * y; |
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327 JRT_END |
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328 |
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329 JRT_LEAF(jdouble, SharedRuntime::ddiv(jdouble x, jdouble y)) |
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330 return x / y; |
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331 JRT_END |
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332 |
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333 JRT_LEAF(jfloat, SharedRuntime::i2f(jint x)) |
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334 return (jfloat)x; |
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335 JRT_END |
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336 |
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337 JRT_LEAF(jdouble, SharedRuntime::i2d(jint x)) |
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338 return (jdouble)x; |
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339 JRT_END |
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340 |
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341 JRT_LEAF(jdouble, SharedRuntime::f2d(jfloat x)) |
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342 return (jdouble)x; |
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343 JRT_END |
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344 |
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345 JRT_LEAF(int, SharedRuntime::fcmpl(float x, float y)) |
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346 return x>y ? 1 : (x==y ? 0 : -1); /* x<y or is_nan*/ |
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347 JRT_END |
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348 |
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349 JRT_LEAF(int, SharedRuntime::fcmpg(float x, float y)) |
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350 return x<y ? -1 : (x==y ? 0 : 1); /* x>y or is_nan */ |
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351 JRT_END |
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352 |
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353 JRT_LEAF(int, SharedRuntime::dcmpl(double x, double y)) |
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354 return x>y ? 1 : (x==y ? 0 : -1); /* x<y or is_nan */ |
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355 JRT_END |
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356 |
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357 JRT_LEAF(int, SharedRuntime::dcmpg(double x, double y)) |
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358 return x<y ? -1 : (x==y ? 0 : 1); /* x>y or is_nan */ |
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359 JRT_END |
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360 |
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361 // Functions to return the opposite of the aeabi functions for nan. |
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362 JRT_LEAF(int, SharedRuntime::unordered_fcmplt(float x, float y)) |
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363 return (x < y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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364 JRT_END |
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365 |
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366 JRT_LEAF(int, SharedRuntime::unordered_dcmplt(double x, double y)) |
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367 return (x < y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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368 JRT_END |
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369 |
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370 JRT_LEAF(int, SharedRuntime::unordered_fcmple(float x, float y)) |
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371 return (x <= y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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372 JRT_END |
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373 |
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374 JRT_LEAF(int, SharedRuntime::unordered_dcmple(double x, double y)) |
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375 return (x <= y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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376 JRT_END |
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377 |
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378 JRT_LEAF(int, SharedRuntime::unordered_fcmpge(float x, float y)) |
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379 return (x >= y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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380 JRT_END |
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381 |
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382 JRT_LEAF(int, SharedRuntime::unordered_dcmpge(double x, double y)) |
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383 return (x >= y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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384 JRT_END |
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385 |
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386 JRT_LEAF(int, SharedRuntime::unordered_fcmpgt(float x, float y)) |
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387 return (x > y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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388 JRT_END |
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389 |
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390 JRT_LEAF(int, SharedRuntime::unordered_dcmpgt(double x, double y)) |
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391 return (x > y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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392 JRT_END |
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393 |
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394 // Intrinsics make gcc generate code for these. |
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395 float SharedRuntime::fneg(float f) { |
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396 return -f; |
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397 } |
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398 |
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399 double SharedRuntime::dneg(double f) { |
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400 return -f; |
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401 } |
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402 |
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403 #endif // __SOFTFP__ |
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404 |
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405 #if defined(__SOFTFP__) || defined(E500V2) |
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406 // Intrinsics make gcc generate code for these. |
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407 double SharedRuntime::dabs(double f) { |
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408 return (f <= (double)0.0) ? (double)0.0 - f : f; |
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409 } |
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410 |
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411 #endif |
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412 |
14390 | 413 #if defined(__SOFTFP__) || defined(PPC32) |
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414 double SharedRuntime::dsqrt(double f) { |
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415 return sqrt(f); |
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416 } |
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417 #endif |
0 | 418 |
419 JRT_LEAF(jint, SharedRuntime::f2i(jfloat x)) | |
508
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420 if (g_isnan(x)) |
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421 return 0; |
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422 if (x >= (jfloat) max_jint) |
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423 return max_jint; |
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424 if (x <= (jfloat) min_jint) |
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425 return min_jint; |
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426 return (jint) x; |
0 | 427 JRT_END |
428 | |
429 | |
430 JRT_LEAF(jlong, SharedRuntime::f2l(jfloat x)) | |
508
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431 if (g_isnan(x)) |
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432 return 0; |
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433 if (x >= (jfloat) max_jlong) |
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434 return max_jlong; |
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435 if (x <= (jfloat) min_jlong) |
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436 return min_jlong; |
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437 return (jlong) x; |
0 | 438 JRT_END |
439 | |
440 | |
441 JRT_LEAF(jint, SharedRuntime::d2i(jdouble x)) | |
508
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442 if (g_isnan(x)) |
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443 return 0; |
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444 if (x >= (jdouble) max_jint) |
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445 return max_jint; |
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446 if (x <= (jdouble) min_jint) |
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447 return min_jint; |
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448 return (jint) x; |
0 | 449 JRT_END |
450 | |
451 | |
452 JRT_LEAF(jlong, SharedRuntime::d2l(jdouble x)) | |
508
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453 if (g_isnan(x)) |
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454 return 0; |
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455 if (x >= (jdouble) max_jlong) |
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456 return max_jlong; |
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457 if (x <= (jdouble) min_jlong) |
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458 return min_jlong; |
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459 return (jlong) x; |
0 | 460 JRT_END |
461 | |
462 | |
463 JRT_LEAF(jfloat, SharedRuntime::d2f(jdouble x)) | |
464 return (jfloat)x; | |
465 JRT_END | |
466 | |
467 | |
468 JRT_LEAF(jfloat, SharedRuntime::l2f(jlong x)) | |
469 return (jfloat)x; | |
470 JRT_END | |
471 | |
472 | |
473 JRT_LEAF(jdouble, SharedRuntime::l2d(jlong x)) | |
474 return (jdouble)x; | |
475 JRT_END | |
476 | |
477 // Exception handling accross interpreter/compiler boundaries | |
478 // | |
479 // exception_handler_for_return_address(...) returns the continuation address. | |
480 // The continuation address is the entry point of the exception handler of the | |
481 // previous frame depending on the return address. | |
482 | |
1295 | 483 address SharedRuntime::raw_exception_handler_for_return_address(JavaThread* thread, address return_address) { |
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484 assert(frame::verify_return_pc(return_address), err_msg("must be a return address: " INTPTR_FORMAT, return_address)); |
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485 |
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486 // Reset method handle flag. |
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487 thread->set_is_method_handle_return(false); |
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488 |
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489 // The fastest case first |
0 | 490 CodeBlob* blob = CodeCache::find_blob(return_address); |
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491 nmethod* nm = (blob != NULL) ? blob->as_nmethod_or_null() : NULL; |
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492 if (nm != NULL) { |
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493 // Set flag if return address is a method handle call site. |
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494 thread->set_is_method_handle_return(nm->is_method_handle_return(return_address)); |
0 | 495 // native nmethods don't have exception handlers |
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496 assert(!nm->is_native_method(), "no exception handler"); |
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497 assert(nm->header_begin() != nm->exception_begin(), "no exception handler"); |
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498 if (nm->is_deopt_pc(return_address)) { |
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499 // If we come here because of a stack overflow, the stack may be |
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500 // unguarded. Reguard the stack otherwise if we return to the |
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501 // deopt blob and the stack bang causes a stack overflow we |
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502 // crash. |
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503 bool guard_pages_enabled = thread->stack_yellow_zone_enabled(); |
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504 if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack(); |
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505 assert(guard_pages_enabled, "stack banging in deopt blob may cause crash"); |
0 | 506 return SharedRuntime::deopt_blob()->unpack_with_exception(); |
507 } else { | |
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508 return nm->exception_begin(); |
0 | 509 } |
510 } | |
511 | |
512 // Entry code | |
513 if (StubRoutines::returns_to_call_stub(return_address)) { | |
514 return StubRoutines::catch_exception_entry(); | |
515 } | |
516 // Interpreted code | |
517 if (Interpreter::contains(return_address)) { | |
518 return Interpreter::rethrow_exception_entry(); | |
519 } | |
520 | |
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521 guarantee(blob == NULL || !blob->is_runtime_stub(), "caller should have skipped stub"); |
0 | 522 guarantee(!VtableStubs::contains(return_address), "NULL exceptions in vtables should have been handled already!"); |
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523 |
0 | 524 #ifndef PRODUCT |
525 { ResourceMark rm; | |
526 tty->print_cr("No exception handler found for exception at " INTPTR_FORMAT " - potential problems:", return_address); | |
527 tty->print_cr("a) exception happened in (new?) code stubs/buffers that is not handled here"); | |
528 tty->print_cr("b) other problem"); | |
529 } | |
530 #endif // PRODUCT | |
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531 |
0 | 532 ShouldNotReachHere(); |
533 return NULL; | |
534 } | |
535 | |
536 | |
1295 | 537 JRT_LEAF(address, SharedRuntime::exception_handler_for_return_address(JavaThread* thread, address return_address)) |
538 return raw_exception_handler_for_return_address(thread, return_address); | |
0 | 539 JRT_END |
540 | |
1295 | 541 |
0 | 542 address SharedRuntime::get_poll_stub(address pc) { |
543 address stub; | |
544 // Look up the code blob | |
545 CodeBlob *cb = CodeCache::find_blob(pc); | |
546 | |
547 // Should be an nmethod | |
548 assert( cb && cb->is_nmethod(), "safepoint polling: pc must refer to an nmethod" ); | |
549 | |
550 // Look up the relocation information | |
551 assert( ((nmethod*)cb)->is_at_poll_or_poll_return(pc), | |
552 "safepoint polling: type must be poll" ); | |
553 | |
554 assert( ((NativeInstruction*)pc)->is_safepoint_poll(), | |
555 "Only polling locations are used for safepoint"); | |
556 | |
557 bool at_poll_return = ((nmethod*)cb)->is_at_poll_return(pc); | |
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558 bool has_wide_vectors = ((nmethod*)cb)->has_wide_vectors(); |
0 | 559 if (at_poll_return) { |
560 assert(SharedRuntime::polling_page_return_handler_blob() != NULL, | |
561 "polling page return stub not created yet"); | |
1748 | 562 stub = SharedRuntime::polling_page_return_handler_blob()->entry_point(); |
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563 } else if (has_wide_vectors) { |
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564 assert(SharedRuntime::polling_page_vectors_safepoint_handler_blob() != NULL, |
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565 "polling page vectors safepoint stub not created yet"); |
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566 stub = SharedRuntime::polling_page_vectors_safepoint_handler_blob()->entry_point(); |
0 | 567 } else { |
568 assert(SharedRuntime::polling_page_safepoint_handler_blob() != NULL, | |
569 "polling page safepoint stub not created yet"); | |
1748 | 570 stub = SharedRuntime::polling_page_safepoint_handler_blob()->entry_point(); |
0 | 571 } |
572 #ifndef PRODUCT | |
573 if( TraceSafepoint ) { | |
574 char buf[256]; | |
575 jio_snprintf(buf, sizeof(buf), | |
576 "... found polling page %s exception at pc = " | |
577 INTPTR_FORMAT ", stub =" INTPTR_FORMAT, | |
578 at_poll_return ? "return" : "loop", | |
579 (intptr_t)pc, (intptr_t)stub); | |
580 tty->print_raw_cr(buf); | |
581 } | |
582 #endif // PRODUCT | |
583 return stub; | |
584 } | |
585 | |
586 | |
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587 oop SharedRuntime::retrieve_receiver( Symbol* sig, frame caller ) { |
0 | 588 assert(caller.is_interpreted_frame(), ""); |
589 int args_size = ArgumentSizeComputer(sig).size() + 1; | |
590 assert(args_size <= caller.interpreter_frame_expression_stack_size(), "receiver must be on interpreter stack"); | |
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591 oop result = cast_to_oop(*caller.interpreter_frame_tos_at(args_size - 1)); |
0 | 592 assert(Universe::heap()->is_in(result) && result->is_oop(), "receiver must be an oop"); |
593 return result; | |
594 } | |
595 | |
596 | |
597 void SharedRuntime::throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception) { | |
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598 if (JvmtiExport::can_post_on_exceptions()) { |
0 | 599 vframeStream vfst(thread, true); |
600 methodHandle method = methodHandle(thread, vfst.method()); | |
601 address bcp = method()->bcp_from(vfst.bci()); | |
602 JvmtiExport::post_exception_throw(thread, method(), bcp, h_exception()); | |
603 } | |
604 Exceptions::_throw(thread, __FILE__, __LINE__, h_exception); | |
605 } | |
606 | |
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607 void SharedRuntime::throw_and_post_jvmti_exception(JavaThread *thread, Symbol* name, const char *message) { |
0 | 608 Handle h_exception = Exceptions::new_exception(thread, name, message); |
609 throw_and_post_jvmti_exception(thread, h_exception); | |
610 } | |
611 | |
610
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612 // The interpreter code to call this tracing function is only |
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613 // called/generated when TraceRedefineClasses has the right bits |
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614 // set. Since obsolete methods are never compiled, we don't have |
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615 // to modify the compilers to generate calls to this function. |
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616 // |
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617 JRT_LEAF(int, SharedRuntime::rc_trace_method_entry( |
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618 JavaThread* thread, Method* method)) |
610
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619 assert(RC_TRACE_IN_RANGE(0x00001000, 0x00002000), "wrong call"); |
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620 |
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621 if (method->is_obsolete()) { |
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622 // We are calling an obsolete method, but this is not necessarily |
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623 // an error. Our method could have been redefined just after we |
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624 // fetched the Method* from the constant pool. |
610
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625 |
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626 // RC_TRACE macro has an embedded ResourceMark |
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627 RC_TRACE_WITH_THREAD(0x00001000, thread, |
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628 ("calling obsolete method '%s'", |
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629 method->name_and_sig_as_C_string())); |
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630 if (RC_TRACE_ENABLED(0x00002000)) { |
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631 // this option is provided to debug calls to obsolete methods |
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632 guarantee(false, "faulting at call to an obsolete method."); |
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633 } |
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634 } |
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635 return 0; |
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636 JRT_END |
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637 |
0 | 638 // ret_pc points into caller; we are returning caller's exception handler |
639 // for given exception | |
640 address SharedRuntime::compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception, | |
641 bool force_unwind, bool top_frame_only) { | |
642 assert(nm != NULL, "must exist"); | |
643 ResourceMark rm; | |
644 | |
645 ScopeDesc* sd = nm->scope_desc_at(ret_pc); | |
646 // determine handler bci, if any | |
647 EXCEPTION_MARK; | |
648 | |
649 int handler_bci = -1; | |
650 int scope_depth = 0; | |
651 if (!force_unwind) { | |
652 int bci = sd->bci(); | |
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653 bool recursive_exception = false; |
0 | 654 do { |
655 bool skip_scope_increment = false; | |
656 // exception handler lookup | |
657 KlassHandle ek (THREAD, exception->klass()); | |
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658 methodHandle mh(THREAD, sd->method()); |
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659 handler_bci = Method::fast_exception_handler_bci_for(mh, ek, bci, THREAD); |
0 | 660 if (HAS_PENDING_EXCEPTION) { |
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661 recursive_exception = true; |
0 | 662 // We threw an exception while trying to find the exception handler. |
663 // Transfer the new exception to the exception handle which will | |
664 // be set into thread local storage, and do another lookup for an | |
665 // exception handler for this exception, this time starting at the | |
666 // BCI of the exception handler which caused the exception to be | |
667 // thrown (bugs 4307310 and 4546590). Set "exception" reference | |
668 // argument to ensure that the correct exception is thrown (4870175). | |
669 exception = Handle(THREAD, PENDING_EXCEPTION); | |
670 CLEAR_PENDING_EXCEPTION; | |
671 if (handler_bci >= 0) { | |
672 bci = handler_bci; | |
673 handler_bci = -1; | |
674 skip_scope_increment = true; | |
675 } | |
676 } | |
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677 else { |
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678 recursive_exception = false; |
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679 } |
0 | 680 if (!top_frame_only && handler_bci < 0 && !skip_scope_increment) { |
681 sd = sd->sender(); | |
682 if (sd != NULL) { | |
683 bci = sd->bci(); | |
684 } | |
685 ++scope_depth; | |
686 } | |
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687 } while (recursive_exception || (!top_frame_only && handler_bci < 0 && sd != NULL)); |
0 | 688 } |
689 | |
690 // found handling method => lookup exception handler | |
1748 | 691 int catch_pco = ret_pc - nm->code_begin(); |
0 | 692 |
693 ExceptionHandlerTable table(nm); | |
694 HandlerTableEntry *t = table.entry_for(catch_pco, handler_bci, scope_depth); | |
695 if (t == NULL && (nm->is_compiled_by_c1() || handler_bci != -1)) { | |
696 // Allow abbreviated catch tables. The idea is to allow a method | |
697 // to materialize its exceptions without committing to the exact | |
698 // routing of exceptions. In particular this is needed for adding | |
699 // a synthethic handler to unlock monitors when inlining | |
700 // synchonized methods since the unlock path isn't represented in | |
701 // the bytecodes. | |
702 t = table.entry_for(catch_pco, -1, 0); | |
703 } | |
704 | |
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705 #ifdef COMPILER1 |
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706 if (t == NULL && nm->is_compiled_by_c1()) { |
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707 assert(nm->unwind_handler_begin() != NULL, ""); |
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708 return nm->unwind_handler_begin(); |
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709 } |
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710 #endif |
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711 |
0 | 712 if (t == NULL) { |
713 tty->print_cr("MISSING EXCEPTION HANDLER for pc " INTPTR_FORMAT " and handler bci %d", ret_pc, handler_bci); | |
714 tty->print_cr(" Exception:"); | |
715 exception->print(); | |
716 tty->cr(); | |
717 tty->print_cr(" Compiled exception table :"); | |
718 table.print(); | |
719 nm->print_code(); | |
720 guarantee(false, "missing exception handler"); | |
721 return NULL; | |
722 } | |
723 | |
1748 | 724 return nm->code_begin() + t->pco(); |
0 | 725 } |
726 | |
727 JRT_ENTRY(void, SharedRuntime::throw_AbstractMethodError(JavaThread* thread)) | |
728 // These errors occur only at call sites | |
729 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_AbstractMethodError()); | |
730 JRT_END | |
731 | |
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732 JRT_ENTRY(void, SharedRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) |
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733 // These errors occur only at call sites |
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734 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_IncompatibleClassChangeError(), "vtable stub"); |
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735 JRT_END |
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736 |
0 | 737 JRT_ENTRY(void, SharedRuntime::throw_ArithmeticException(JavaThread* thread)) |
738 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_ArithmeticException(), "/ by zero"); | |
739 JRT_END | |
740 | |
741 JRT_ENTRY(void, SharedRuntime::throw_NullPointerException(JavaThread* thread)) | |
742 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_NullPointerException()); | |
743 JRT_END | |
744 | |
745 JRT_ENTRY(void, SharedRuntime::throw_NullPointerException_at_call(JavaThread* thread)) | |
746 // This entry point is effectively only used for NullPointerExceptions which occur at inline | |
747 // cache sites (when the callee activation is not yet set up) so we are at a call site | |
748 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_NullPointerException()); | |
749 JRT_END | |
750 | |
751 JRT_ENTRY(void, SharedRuntime::throw_StackOverflowError(JavaThread* thread)) | |
752 // We avoid using the normal exception construction in this case because | |
753 // it performs an upcall to Java, and we're already out of stack space. | |
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754 Klass* k = SystemDictionary::StackOverflowError_klass(); |
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755 oop exception_oop = InstanceKlass::cast(k)->allocate_instance(CHECK); |
0 | 756 Handle exception (thread, exception_oop); |
757 if (StackTraceInThrowable) { | |
758 java_lang_Throwable::fill_in_stack_trace(exception); | |
759 } | |
760 throw_and_post_jvmti_exception(thread, exception); | |
761 JRT_END | |
762 | |
763 address SharedRuntime::continuation_for_implicit_exception(JavaThread* thread, | |
764 address pc, | |
765 SharedRuntime::ImplicitExceptionKind exception_kind) | |
766 { | |
767 address target_pc = NULL; | |
768 | |
769 if (Interpreter::contains(pc)) { | |
770 #ifdef CC_INTERP | |
771 // C++ interpreter doesn't throw implicit exceptions | |
772 ShouldNotReachHere(); | |
773 #else | |
774 switch (exception_kind) { | |
775 case IMPLICIT_NULL: return Interpreter::throw_NullPointerException_entry(); | |
776 case IMPLICIT_DIVIDE_BY_ZERO: return Interpreter::throw_ArithmeticException_entry(); | |
777 case STACK_OVERFLOW: return Interpreter::throw_StackOverflowError_entry(); | |
778 default: ShouldNotReachHere(); | |
779 } | |
780 #endif // !CC_INTERP | |
781 } else { | |
782 switch (exception_kind) { | |
783 case STACK_OVERFLOW: { | |
784 // Stack overflow only occurs upon frame setup; the callee is | |
785 // going to be unwound. Dispatch to a shared runtime stub | |
786 // which will cause the StackOverflowError to be fabricated | |
787 // and processed. | |
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788 // Stack overflow should never occur during deoptimization: |
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789 // the compiled method bangs the stack by as much as the |
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790 // interpreter would need in case of a deoptimization. The |
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791 // deoptimization blob and uncommon trap blob bang the stack |
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792 // in a debug VM to verify the correctness of the compiled |
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793 // method stack banging. |
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794 assert(thread->deopt_mark() == NULL, "no stack overflow from deopt blob/uncommon trap"); |
4944 | 795 Events::log_exception(thread, "StackOverflowError at " INTPTR_FORMAT, pc); |
0 | 796 return StubRoutines::throw_StackOverflowError_entry(); |
797 } | |
798 | |
799 case IMPLICIT_NULL: { | |
800 if (VtableStubs::contains(pc)) { | |
801 // We haven't yet entered the callee frame. Fabricate an | |
802 // exception and begin dispatching it in the caller. Since | |
803 // the caller was at a call site, it's safe to destroy all | |
804 // caller-saved registers, as these entry points do. | |
805 VtableStub* vt_stub = VtableStubs::stub_containing(pc); | |
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806 |
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807 // If vt_stub is NULL, then return NULL to signal handler to report the SEGV error. |
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808 if (vt_stub == NULL) return NULL; |
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809 |
0 | 810 if (vt_stub->is_abstract_method_error(pc)) { |
811 assert(!vt_stub->is_vtable_stub(), "should never see AbstractMethodErrors from vtable-type VtableStubs"); | |
4944 | 812 Events::log_exception(thread, "AbstractMethodError at " INTPTR_FORMAT, pc); |
0 | 813 return StubRoutines::throw_AbstractMethodError_entry(); |
814 } else { | |
4944 | 815 Events::log_exception(thread, "NullPointerException at vtable entry " INTPTR_FORMAT, pc); |
0 | 816 return StubRoutines::throw_NullPointerException_at_call_entry(); |
817 } | |
818 } else { | |
819 CodeBlob* cb = CodeCache::find_blob(pc); | |
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820 |
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821 // If code blob is NULL, then return NULL to signal handler to report the SEGV error. |
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822 if (cb == NULL) return NULL; |
0 | 823 |
824 // Exception happened in CodeCache. Must be either: | |
825 // 1. Inline-cache check in C2I handler blob, | |
826 // 2. Inline-cache check in nmethod, or | |
827 // 3. Implict null exception in nmethod | |
828 | |
829 if (!cb->is_nmethod()) { | |
11029 | 830 bool is_in_blob = cb->is_adapter_blob() || cb->is_method_handles_adapter_blob(); |
831 if (!is_in_blob) { | |
832 cb->print(); | |
833 fatal(err_msg("exception happened outside interpreter, nmethods and vtable stubs at pc " INTPTR_FORMAT, pc)); | |
834 } | |
4944 | 835 Events::log_exception(thread, "NullPointerException in code blob at " INTPTR_FORMAT, pc); |
0 | 836 // There is no handler here, so we will simply unwind. |
837 return StubRoutines::throw_NullPointerException_at_call_entry(); | |
838 } | |
839 | |
840 // Otherwise, it's an nmethod. Consult its exception handlers. | |
841 nmethod* nm = (nmethod*)cb; | |
842 if (nm->inlinecache_check_contains(pc)) { | |
843 // exception happened inside inline-cache check code | |
844 // => the nmethod is not yet active (i.e., the frame | |
845 // is not set up yet) => use return address pushed by | |
846 // caller => don't push another return address | |
4944 | 847 Events::log_exception(thread, "NullPointerException in IC check " INTPTR_FORMAT, pc); |
0 | 848 return StubRoutines::throw_NullPointerException_at_call_entry(); |
849 } | |
850 | |
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851 if (nm->method()->is_method_handle_intrinsic()) { |
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852 // exception happened inside MH dispatch code, similar to a vtable stub |
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853 Events::log_exception(thread, "NullPointerException in MH adapter " INTPTR_FORMAT, pc); |
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854 return StubRoutines::throw_NullPointerException_at_call_entry(); |
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855 } |
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856 |
0 | 857 #ifndef PRODUCT |
858 _implicit_null_throws++; | |
859 #endif | |
860 target_pc = nm->continuation_for_implicit_exception(pc); | |
1250 | 861 // If there's an unexpected fault, target_pc might be NULL, |
862 // in which case we want to fall through into the normal | |
863 // error handling code. | |
0 | 864 } |
865 | |
866 break; // fall through | |
867 } | |
868 | |
869 | |
870 case IMPLICIT_DIVIDE_BY_ZERO: { | |
871 nmethod* nm = CodeCache::find_nmethod(pc); | |
872 guarantee(nm != NULL, "must have containing nmethod for implicit division-by-zero exceptions"); | |
873 #ifndef PRODUCT | |
874 _implicit_div0_throws++; | |
875 #endif | |
876 target_pc = nm->continuation_for_implicit_exception(pc); | |
1250 | 877 // If there's an unexpected fault, target_pc might be NULL, |
878 // in which case we want to fall through into the normal | |
879 // error handling code. | |
0 | 880 break; // fall through |
881 } | |
882 | |
883 default: ShouldNotReachHere(); | |
884 } | |
885 | |
886 assert(exception_kind == IMPLICIT_NULL || exception_kind == IMPLICIT_DIVIDE_BY_ZERO, "wrong implicit exception kind"); | |
887 | |
888 // for AbortVMOnException flag | |
889 NOT_PRODUCT(Exceptions::debug_check_abort("java.lang.NullPointerException")); | |
890 if (exception_kind == IMPLICIT_NULL) { | |
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891 Events::log_exception(thread, "Implicit null exception at " INTPTR_FORMAT " to " INTPTR_FORMAT, pc, target_pc); |
0 | 892 } else { |
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893 Events::log_exception(thread, "Implicit division by zero exception at " INTPTR_FORMAT " to " INTPTR_FORMAT, pc, target_pc); |
0 | 894 } |
895 return target_pc; | |
896 } | |
897 | |
898 ShouldNotReachHere(); | |
899 return NULL; | |
900 } | |
901 | |
902 | |
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903 /** |
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904 * Throws an java/lang/UnsatisfiedLinkError. The address of this method is |
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905 * installed in the native function entry of all native Java methods before |
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906 * they get linked to their actual native methods. |
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907 * |
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908 * \note |
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909 * This method actually never gets called! The reason is because |
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910 * the interpreter's native entries call NativeLookup::lookup() which |
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911 * throws the exception when the lookup fails. The exception is then |
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912 * caught and forwarded on the return from NativeLookup::lookup() call |
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913 * before the call to the native function. This might change in the future. |
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914 */ |
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915 JNI_ENTRY(void*, throw_unsatisfied_link_error(JNIEnv* env, ...)) |
0 | 916 { |
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917 // We return a bad value here to make sure that the exception is |
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918 // forwarded before we look at the return value. |
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919 THROW_(vmSymbols::java_lang_UnsatisfiedLinkError(), (void*)badJNIHandle); |
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920 } |
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921 JNI_END |
0 | 922 |
923 address SharedRuntime::native_method_throw_unsatisfied_link_error_entry() { | |
924 return CAST_FROM_FN_PTR(address, &throw_unsatisfied_link_error); | |
925 } | |
926 | |
927 | |
928 #ifndef PRODUCT | |
929 JRT_ENTRY(intptr_t, SharedRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2)) | |
930 const frame f = thread->last_frame(); | |
931 assert(f.is_interpreted_frame(), "must be an interpreted frame"); | |
932 #ifndef PRODUCT | |
933 methodHandle mh(THREAD, f.interpreter_frame_method()); | |
934 BytecodeTracer::trace(mh, f.interpreter_frame_bcp(), tos, tos2); | |
935 #endif // !PRODUCT | |
936 return preserve_this_value; | |
937 JRT_END | |
938 #endif // !PRODUCT | |
939 | |
940 | |
941 JRT_ENTRY(void, SharedRuntime::yield_all(JavaThread* thread, int attempts)) | |
942 os::yield_all(attempts); | |
943 JRT_END | |
944 | |
945 | |
946 JRT_ENTRY_NO_ASYNC(void, SharedRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) | |
947 assert(obj->is_oop(), "must be a valid oop"); | |
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948 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise"); |
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949 InstanceKlass::register_finalizer(instanceOop(obj), CHECK); |
0 | 950 JRT_END |
951 | |
952 | |
953 jlong SharedRuntime::get_java_tid(Thread* thread) { | |
954 if (thread != NULL) { | |
955 if (thread->is_Java_thread()) { | |
956 oop obj = ((JavaThread*)thread)->threadObj(); | |
957 return (obj == NULL) ? 0 : java_lang_Thread::thread_id(obj); | |
958 } | |
959 } | |
960 return 0; | |
961 } | |
962 | |
963 /** | |
964 * This function ought to be a void function, but cannot be because | |
965 * it gets turned into a tail-call on sparc, which runs into dtrace bug | |
966 * 6254741. Once that is fixed we can remove the dummy return value. | |
967 */ | |
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968 int SharedRuntime::dtrace_object_alloc(oopDesc* o, int size) { |
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969 return dtrace_object_alloc_base(Thread::current(), o, size); |
0 | 970 } |
971 | |
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972 int SharedRuntime::dtrace_object_alloc_base(Thread* thread, oopDesc* o, int size) { |
0 | 973 assert(DTraceAllocProbes, "wrong call"); |
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974 Klass* klass = o->klass(); |
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975 Symbol* name = klass->name(); |
4006 | 976 #ifndef USDT2 |
0 | 977 HS_DTRACE_PROBE4(hotspot, object__alloc, get_java_tid(thread), |
978 name->bytes(), name->utf8_length(), size * HeapWordSize); | |
4006 | 979 #else /* USDT2 */ |
980 HOTSPOT_OBJECT_ALLOC( | |
981 get_java_tid(thread), | |
982 (char *) name->bytes(), name->utf8_length(), size * HeapWordSize); | |
983 #endif /* USDT2 */ | |
0 | 984 return 0; |
985 } | |
986 | |
987 JRT_LEAF(int, SharedRuntime::dtrace_method_entry( | |
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988 JavaThread* thread, Method* method)) |
0 | 989 assert(DTraceMethodProbes, "wrong call"); |
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990 Symbol* kname = method->klass_name(); |
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991 Symbol* name = method->name(); |
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992 Symbol* sig = method->signature(); |
4006 | 993 #ifndef USDT2 |
0 | 994 HS_DTRACE_PROBE7(hotspot, method__entry, get_java_tid(thread), |
995 kname->bytes(), kname->utf8_length(), | |
996 name->bytes(), name->utf8_length(), | |
997 sig->bytes(), sig->utf8_length()); | |
4006 | 998 #else /* USDT2 */ |
999 HOTSPOT_METHOD_ENTRY( | |
1000 get_java_tid(thread), | |
1001 (char *) kname->bytes(), kname->utf8_length(), | |
1002 (char *) name->bytes(), name->utf8_length(), | |
1003 (char *) sig->bytes(), sig->utf8_length()); | |
1004 #endif /* USDT2 */ | |
0 | 1005 return 0; |
1006 JRT_END | |
1007 | |
1008 JRT_LEAF(int, SharedRuntime::dtrace_method_exit( | |
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1009 JavaThread* thread, Method* method)) |
0 | 1010 assert(DTraceMethodProbes, "wrong call"); |
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1011 Symbol* kname = method->klass_name(); |
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1012 Symbol* name = method->name(); |
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1013 Symbol* sig = method->signature(); |
4006 | 1014 #ifndef USDT2 |
0 | 1015 HS_DTRACE_PROBE7(hotspot, method__return, get_java_tid(thread), |
1016 kname->bytes(), kname->utf8_length(), | |
1017 name->bytes(), name->utf8_length(), | |
1018 sig->bytes(), sig->utf8_length()); | |
4006 | 1019 #else /* USDT2 */ |
1020 HOTSPOT_METHOD_RETURN( | |
1021 get_java_tid(thread), | |
1022 (char *) kname->bytes(), kname->utf8_length(), | |
1023 (char *) name->bytes(), name->utf8_length(), | |
1024 (char *) sig->bytes(), sig->utf8_length()); | |
1025 #endif /* USDT2 */ | |
0 | 1026 return 0; |
1027 JRT_END | |
1028 | |
1029 | |
1030 // Finds receiver, CallInfo (i.e. receiver method), and calling bytecode) | |
1031 // for a call current in progress, i.e., arguments has been pushed on stack | |
1032 // put callee has not been invoked yet. Used by: resolve virtual/static, | |
1033 // vtable updates, etc. Caller frame must be compiled. | |
1034 Handle SharedRuntime::find_callee_info(JavaThread* thread, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS) { | |
1035 ResourceMark rm(THREAD); | |
1036 | |
1037 // last java frame on stack (which includes native call frames) | |
1038 vframeStream vfst(thread, true); // Do not skip and javaCalls | |
1039 | |
1040 return find_callee_info_helper(thread, vfst, bc, callinfo, CHECK_(Handle())); | |
1041 } | |
1042 | |
1043 | |
1044 // Finds receiver, CallInfo (i.e. receiver method), and calling bytecode | |
1045 // for a call current in progress, i.e., arguments has been pushed on stack | |
1046 // but callee has not been invoked yet. Caller frame must be compiled. | |
1047 Handle SharedRuntime::find_callee_info_helper(JavaThread* thread, | |
1048 vframeStream& vfst, | |
1049 Bytecodes::Code& bc, | |
1050 CallInfo& callinfo, TRAPS) { | |
1051 Handle receiver; | |
1052 Handle nullHandle; //create a handy null handle for exception returns | |
1053 | |
1054 assert(!vfst.at_end(), "Java frame must exist"); | |
1055 | |
1056 // Find caller and bci from vframe | |
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1057 methodHandle caller(THREAD, vfst.method()); |
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1058 int bci = vfst.bci(); |
0 | 1059 |
1060 // Find bytecode | |
2142 | 1061 Bytecode_invoke bytecode(caller, bci); |
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1062 bc = bytecode.invoke_code(); |
2142 | 1063 int bytecode_index = bytecode.index(); |
0 | 1064 |
1065 // Find receiver for non-static call | |
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1066 if (bc != Bytecodes::_invokestatic && |
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1067 bc != Bytecodes::_invokedynamic && |
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1068 bc != Bytecodes::_invokehandle) { |
0 | 1069 // This register map must be update since we need to find the receiver for |
1070 // compiled frames. The receiver might be in a register. | |
1071 RegisterMap reg_map2(thread); | |
1072 frame stubFrame = thread->last_frame(); | |
1073 // Caller-frame is a compiled frame | |
1074 frame callerFrame = stubFrame.sender(®_map2); | |
1075 | |
2142 | 1076 methodHandle callee = bytecode.static_target(CHECK_(nullHandle)); |
0 | 1077 if (callee.is_null()) { |
1078 THROW_(vmSymbols::java_lang_NoSuchMethodException(), nullHandle); | |
1079 } | |
1080 // Retrieve from a compiled argument list | |
1081 receiver = Handle(THREAD, callerFrame.retrieve_receiver(®_map2)); | |
1082 | |
1083 if (receiver.is_null()) { | |
1084 THROW_(vmSymbols::java_lang_NullPointerException(), nullHandle); | |
1085 } | |
1086 } | |
1087 | |
1088 // Resolve method. This is parameterized by bytecode. | |
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1089 constantPoolHandle constants(THREAD, caller->constants()); |
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1090 assert(receiver.is_null() || receiver->is_oop(), "wrong receiver"); |
0 | 1091 LinkResolver::resolve_invoke(callinfo, receiver, constants, bytecode_index, bc, CHECK_(nullHandle)); |
1092 | |
1093 #ifdef ASSERT | |
1094 // Check that the receiver klass is of the right subtype and that it is initialized for virtual calls | |
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1095 if (bc != Bytecodes::_invokestatic && bc != Bytecodes::_invokedynamic && bc != Bytecodes::_invokehandle) { |
0 | 1096 assert(receiver.not_null(), "should have thrown exception"); |
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1097 KlassHandle receiver_klass(THREAD, receiver->klass()); |
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1098 Klass* rk = constants->klass_ref_at(bytecode_index, CHECK_(nullHandle)); |
0 | 1099 // klass is already loaded |
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1100 KlassHandle static_receiver_klass(THREAD, rk); |
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1101 // Method handle invokes might have been optimized to a direct call |
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1102 // so don't check for the receiver class. |
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1103 // FIXME this weakens the assert too much |
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1104 methodHandle callee = callinfo.selected_method(); |
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1105 assert(receiver_klass->is_subtype_of(static_receiver_klass()) || |
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1106 callee->is_method_handle_intrinsic() || |
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1107 callee->is_compiled_lambda_form(), |
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1108 "actual receiver must be subclass of static receiver klass"); |
0 | 1109 if (receiver_klass->oop_is_instance()) { |
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1110 if (InstanceKlass::cast(receiver_klass())->is_not_initialized()) { |
0 | 1111 tty->print_cr("ERROR: Klass not yet initialized!!"); |
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1112 receiver_klass()->print(); |
0 | 1113 } |
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1114 assert(!InstanceKlass::cast(receiver_klass())->is_not_initialized(), "receiver_klass must be initialized"); |
0 | 1115 } |
1116 } | |
1117 #endif | |
1118 | |
1119 return receiver; | |
1120 } | |
1121 | |
1122 methodHandle SharedRuntime::find_callee_method(JavaThread* thread, TRAPS) { | |
1123 ResourceMark rm(THREAD); | |
1124 // We need first to check if any Java activations (compiled, interpreted) | |
1125 // exist on the stack since last JavaCall. If not, we need | |
1126 // to get the target method from the JavaCall wrapper. | |
1127 vframeStream vfst(thread, true); // Do not skip any javaCalls | |
1128 methodHandle callee_method; | |
1129 if (vfst.at_end()) { | |
1130 // No Java frames were found on stack since we did the JavaCall. | |
1131 // Hence the stack can only contain an entry_frame. We need to | |
1132 // find the target method from the stub frame. | |
1133 RegisterMap reg_map(thread, false); | |
1134 frame fr = thread->last_frame(); | |
1135 assert(fr.is_runtime_frame(), "must be a runtimeStub"); | |
1136 fr = fr.sender(®_map); | |
1137 assert(fr.is_entry_frame(), "must be"); | |
1138 // fr is now pointing to the entry frame. | |
1139 callee_method = methodHandle(THREAD, fr.entry_frame_call_wrapper()->callee_method()); | |
1140 assert(fr.entry_frame_call_wrapper()->receiver() == NULL || !callee_method->is_static(), "non-null receiver for static call??"); | |
1141 } else { | |
1142 Bytecodes::Code bc; | |
1143 CallInfo callinfo; | |
1144 find_callee_info_helper(thread, vfst, bc, callinfo, CHECK_(methodHandle())); | |
1145 callee_method = callinfo.selected_method(); | |
1146 } | |
1147 assert(callee_method()->is_method(), "must be"); | |
1148 return callee_method; | |
1149 } | |
1150 | |
1151 // Resolves a call. | |
1152 methodHandle SharedRuntime::resolve_helper(JavaThread *thread, | |
1153 bool is_virtual, | |
1154 bool is_optimized, TRAPS) { | |
1155 methodHandle callee_method; | |
1156 callee_method = resolve_sub_helper(thread, is_virtual, is_optimized, THREAD); | |
1157 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { | |
1158 int retry_count = 0; | |
1159 while (!HAS_PENDING_EXCEPTION && callee_method->is_old() && | |
1142 | 1160 callee_method->method_holder() != SystemDictionary::Object_klass()) { |
0 | 1161 // If has a pending exception then there is no need to re-try to |
1162 // resolve this method. | |
1163 // If the method has been redefined, we need to try again. | |
1164 // Hack: we have no way to update the vtables of arrays, so don't | |
1165 // require that java.lang.Object has been updated. | |
1166 | |
1167 // It is very unlikely that method is redefined more than 100 times | |
1168 // in the middle of resolve. If it is looping here more than 100 times | |
1169 // means then there could be a bug here. | |
1170 guarantee((retry_count++ < 100), | |
1171 "Could not resolve to latest version of redefined method"); | |
1172 // method is redefined in the middle of resolve so re-try. | |
1173 callee_method = resolve_sub_helper(thread, is_virtual, is_optimized, THREAD); | |
1174 } | |
1175 } | |
1176 return callee_method; | |
1177 } | |
1178 | |
1179 // Resolves a call. The compilers generate code for calls that go here | |
1180 // and are patched with the real destination of the call. | |
1181 methodHandle SharedRuntime::resolve_sub_helper(JavaThread *thread, | |
1182 bool is_virtual, | |
1183 bool is_optimized, TRAPS) { | |
1184 | |
1185 ResourceMark rm(thread); | |
1186 RegisterMap cbl_map(thread, false); | |
1187 frame caller_frame = thread->last_frame().sender(&cbl_map); | |
1188 | |
1295 | 1189 CodeBlob* caller_cb = caller_frame.cb(); |
1190 guarantee(caller_cb != NULL && caller_cb->is_nmethod(), "must be called from nmethod"); | |
1191 nmethod* caller_nm = caller_cb->as_nmethod_or_null(); | |
13441 | 1192 |
0 | 1193 // make sure caller is not getting deoptimized |
1194 // and removed before we are done with it. | |
1195 // CLEANUP - with lazy deopt shouldn't need this lock | |
1295 | 1196 nmethodLocker caller_lock(caller_nm); |
0 | 1197 |
1198 // determine call info & receiver | |
1199 // note: a) receiver is NULL for static calls | |
1200 // b) an exception is thrown if receiver is NULL for non-static calls | |
1201 CallInfo call_info; | |
1202 Bytecodes::Code invoke_code = Bytecodes::_illegal; | |
1203 Handle receiver = find_callee_info(thread, invoke_code, | |
1204 call_info, CHECK_(methodHandle())); | |
1205 methodHandle callee_method = call_info.selected_method(); | |
1206 | |
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1207 assert((!is_virtual && invoke_code == Bytecodes::_invokestatic ) || |
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1208 (!is_virtual && invoke_code == Bytecodes::_invokehandle ) || |
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1209 (!is_virtual && invoke_code == Bytecodes::_invokedynamic) || |
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1210 ( is_virtual && invoke_code != Bytecodes::_invokestatic ), "inconsistent bytecode"); |
0 | 1211 |
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1212 assert(caller_nm->is_alive(), "It should be alive"); |
13441 | 1213 |
0 | 1214 #ifndef PRODUCT |
1215 // tracing/debugging/statistics | |
1216 int *addr = (is_optimized) ? (&_resolve_opt_virtual_ctr) : | |
1217 (is_virtual) ? (&_resolve_virtual_ctr) : | |
1218 (&_resolve_static_ctr); | |
1219 Atomic::inc(addr); | |
1220 | |
1221 if (TraceCallFixup) { | |
1222 ResourceMark rm(thread); | |
1223 tty->print("resolving %s%s (%s) call to", | |
1224 (is_optimized) ? "optimized " : "", (is_virtual) ? "virtual" : "static", | |
1225 Bytecodes::name(invoke_code)); | |
1226 callee_method->print_short_name(tty); | |
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1227 tty->print_cr(" at pc: " INTPTR_FORMAT " to code: " INTPTR_FORMAT, caller_frame.pc(), callee_method->code()); |
0 | 1228 } |
1229 #endif | |
1230 | |
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1231 // JSR 292 key invariant: |
1295 | 1232 // If the resolved method is a MethodHandle invoke target the call |
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1233 // site must be a MethodHandle call site, because the lambda form might tail-call |
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1234 // leaving the stack in a state unknown to either caller or callee |
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1235 // TODO detune for now but we might need it again |
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1236 // assert(!callee_method->is_compiled_lambda_form() || |
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1237 // caller_nm->is_method_handle_return(caller_frame.pc()), "must be MH call site"); |
1295 | 1238 |
0 | 1239 // Compute entry points. This might require generation of C2I converter |
1240 // frames, so we cannot be holding any locks here. Furthermore, the | |
1241 // computation of the entry points is independent of patching the call. We | |
1242 // always return the entry-point, but we only patch the stub if the call has | |
1243 // not been deoptimized. Return values: For a virtual call this is an | |
1244 // (cached_oop, destination address) pair. For a static call/optimized | |
1245 // virtual this is just a destination address. | |
1246 | |
1247 StaticCallInfo static_call_info; | |
1248 CompiledICInfo virtual_call_info; | |
1249 | |
1250 // Make sure the callee nmethod does not get deoptimized and removed before | |
1251 // we are done patching the code. | |
1295 | 1252 nmethod* callee_nm = callee_method->code(); |
13441 | 1253 if (callee_nm != NULL && !callee_nm->is_in_use()) { |
1254 // Patch call site to C2I adapter if callee nmethod is deoptimized or unloaded. | |
1255 callee_nm = NULL; | |
1256 } | |
1295 | 1257 nmethodLocker nl_callee(callee_nm); |
0 | 1258 #ifdef ASSERT |
1295 | 1259 address dest_entry_point = callee_nm == NULL ? 0 : callee_nm->entry_point(); // used below |
0 | 1260 #endif |
1261 | |
1262 if (is_virtual) { | |
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1263 assert(receiver.not_null() || invoke_code == Bytecodes::_invokehandle, "sanity check"); |
0 | 1264 bool static_bound = call_info.resolved_method()->can_be_statically_bound(); |
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1265 KlassHandle h_klass(THREAD, invoke_code == Bytecodes::_invokehandle ? NULL : receiver->klass()); |
0 | 1266 CompiledIC::compute_monomorphic_entry(callee_method, h_klass, |
1267 is_optimized, static_bound, virtual_call_info, | |
1268 CHECK_(methodHandle())); | |
1269 } else { | |
1270 // static call | |
1271 CompiledStaticCall::compute_entry(callee_method, static_call_info); | |
1272 } | |
1273 | |
1274 // grab lock, check for deoptimization and potentially patch caller | |
1275 { | |
1276 MutexLocker ml_patch(CompiledIC_lock); | |
1277 | |
13441 | 1278 // Lock blocks for safepoint during which both nmethods can change state. |
1279 | |
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1280 // Now that we are ready to patch if the Method* was redefined then |
0 | 1281 // don't update call site and let the caller retry. |
13441 | 1282 // Don't update call site if callee nmethod was unloaded or deoptimized. |
1283 // Don't update call site if callee nmethod was replaced by an other nmethod | |
1284 // which may happen when multiply alive nmethod (tiered compilation) | |
1285 // will be supported. | |
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1286 if (!callee_method->is_old() && |
13441 | 1287 (callee_nm == NULL || callee_nm->is_in_use() && (callee_method->code() == callee_nm))) { |
0 | 1288 #ifdef ASSERT |
1289 // We must not try to patch to jump to an already unloaded method. | |
1290 if (dest_entry_point != 0) { | |
13441 | 1291 CodeBlob* cb = CodeCache::find_blob(dest_entry_point); |
1292 assert((cb != NULL) && cb->is_nmethod() && (((nmethod*)cb) == callee_nm), | |
1293 "should not call unloaded nmethod"); | |
0 | 1294 } |
1295 #endif | |
1296 if (is_virtual) { | |
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1297 nmethod* nm = callee_nm; |
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1298 if (nm == NULL) CodeCache::find_blob(caller_frame.pc()); |
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1299 CompiledIC* inline_cache = CompiledIC_before(caller_nm, caller_frame.pc()); |
0 | 1300 if (inline_cache->is_clean()) { |
1301 inline_cache->set_to_monomorphic(virtual_call_info); | |
1302 } | |
1303 } else { | |
1304 CompiledStaticCall* ssc = compiledStaticCall_before(caller_frame.pc()); | |
1305 if (ssc->is_clean()) ssc->set(static_call_info); | |
1306 } | |
1307 } | |
1308 | |
1309 } // unlock CompiledIC_lock | |
1310 | |
1311 return callee_method; | |
1312 } | |
1313 | |
1314 | |
1315 // Inline caches exist only in compiled code | |
1316 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_ic_miss(JavaThread* thread)) | |
1317 #ifdef ASSERT | |
1318 RegisterMap reg_map(thread, false); | |
1319 frame stub_frame = thread->last_frame(); | |
1320 assert(stub_frame.is_runtime_frame(), "sanity check"); | |
1321 frame caller_frame = stub_frame.sender(®_map); | |
1322 assert(!caller_frame.is_interpreted_frame() && !caller_frame.is_entry_frame(), "unexpected frame"); | |
1323 #endif /* ASSERT */ | |
1324 | |
1325 methodHandle callee_method; | |
1326 JRT_BLOCK | |
1327 callee_method = SharedRuntime::handle_ic_miss_helper(thread, CHECK_NULL); | |
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1328 // Return Method* through TLS |
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1329 thread->set_vm_result_2(callee_method()); |
0 | 1330 JRT_BLOCK_END |
1331 // return compiled code entry point after potential safepoints | |
1332 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1333 return callee_method->verified_code_entry(); | |
1334 JRT_END | |
1335 | |
1336 | |
1337 // Handle call site that has been made non-entrant | |
1338 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method(JavaThread* thread)) | |
1339 // 6243940 We might end up in here if the callee is deoptimized | |
1340 // as we race to call it. We don't want to take a safepoint if | |
1341 // the caller was interpreted because the caller frame will look | |
1342 // interpreted to the stack walkers and arguments are now | |
1343 // "compiled" so it is much better to make this transition | |
1344 // invisible to the stack walking code. The i2c path will | |
1345 // place the callee method in the callee_target. It is stashed | |
1346 // there because if we try and find the callee by normal means a | |
1347 // safepoint is possible and have trouble gc'ing the compiled args. | |
1348 RegisterMap reg_map(thread, false); | |
1349 frame stub_frame = thread->last_frame(); | |
1350 assert(stub_frame.is_runtime_frame(), "sanity check"); | |
1351 frame caller_frame = stub_frame.sender(®_map); | |
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1352 |
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1353 if (caller_frame.is_interpreted_frame() || |
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1354 caller_frame.is_entry_frame()) { |
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1355 Method* callee = thread->callee_target(); |
0 | 1356 guarantee(callee != NULL && callee->is_method(), "bad handshake"); |
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1357 thread->set_vm_result_2(callee); |
0 | 1358 thread->set_callee_target(NULL); |
1359 return callee->get_c2i_entry(); | |
1360 } | |
1361 | |
1362 // Must be compiled to compiled path which is safe to stackwalk | |
1363 methodHandle callee_method; | |
1364 JRT_BLOCK | |
1365 // Force resolving of caller (if we called from compiled frame) | |
1366 callee_method = SharedRuntime::reresolve_call_site(thread, CHECK_NULL); | |
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1367 thread->set_vm_result_2(callee_method()); |
0 | 1368 JRT_BLOCK_END |
1369 // return compiled code entry point after potential safepoints | |
1370 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1371 return callee_method->verified_code_entry(); | |
1372 JRT_END | |
1373 | |
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1374 // Handle abstract method call |
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1375 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_abstract(JavaThread* thread)) |
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1376 return StubRoutines::throw_AbstractMethodError_entry(); |
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1377 JRT_END |
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1378 |
0 | 1379 |
1380 // resolve a static call and patch code | |
1381 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_static_call_C(JavaThread *thread )) | |
1382 methodHandle callee_method; | |
1383 JRT_BLOCK | |
1384 callee_method = SharedRuntime::resolve_helper(thread, false, false, CHECK_NULL); | |
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1385 thread->set_vm_result_2(callee_method()); |
0 | 1386 JRT_BLOCK_END |
1387 // return compiled code entry point after potential safepoints | |
1388 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1389 return callee_method->verified_code_entry(); | |
1390 JRT_END | |
1391 | |
1392 | |
1393 // resolve virtual call and update inline cache to monomorphic | |
1394 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_virtual_call_C(JavaThread *thread )) | |
1395 methodHandle callee_method; | |
1396 JRT_BLOCK | |
1397 callee_method = SharedRuntime::resolve_helper(thread, true, false, CHECK_NULL); | |
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1398 thread->set_vm_result_2(callee_method()); |
0 | 1399 JRT_BLOCK_END |
1400 // return compiled code entry point after potential safepoints | |
1401 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1402 return callee_method->verified_code_entry(); | |
1403 JRT_END | |
1404 | |
1405 | |
1406 // Resolve a virtual call that can be statically bound (e.g., always | |
1407 // monomorphic, so it has no inline cache). Patch code to resolved target. | |
1408 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_opt_virtual_call_C(JavaThread *thread)) | |
1409 methodHandle callee_method; | |
1410 JRT_BLOCK | |
1411 callee_method = SharedRuntime::resolve_helper(thread, true, true, CHECK_NULL); | |
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1412 thread->set_vm_result_2(callee_method()); |
0 | 1413 JRT_BLOCK_END |
1414 // return compiled code entry point after potential safepoints | |
1415 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1416 return callee_method->verified_code_entry(); | |
1417 JRT_END | |
1418 | |
1419 | |
1420 | |
1421 | |
1422 | |
1423 methodHandle SharedRuntime::handle_ic_miss_helper(JavaThread *thread, TRAPS) { | |
1424 ResourceMark rm(thread); | |
1425 CallInfo call_info; | |
1426 Bytecodes::Code bc; | |
1427 | |
1428 // receiver is NULL for static calls. An exception is thrown for NULL | |
1429 // receivers for non-static calls | |
1430 Handle receiver = find_callee_info(thread, bc, call_info, | |
1431 CHECK_(methodHandle())); | |
1432 // Compiler1 can produce virtual call sites that can actually be statically bound | |
1433 // If we fell thru to below we would think that the site was going megamorphic | |
1434 // when in fact the site can never miss. Worse because we'd think it was megamorphic | |
1435 // we'd try and do a vtable dispatch however methods that can be statically bound | |
1436 // don't have vtable entries (vtable_index < 0) and we'd blow up. So we force a | |
1437 // reresolution of the call site (as if we did a handle_wrong_method and not an | |
1438 // plain ic_miss) and the site will be converted to an optimized virtual call site | |
1439 // never to miss again. I don't believe C2 will produce code like this but if it | |
1440 // did this would still be the correct thing to do for it too, hence no ifdef. | |
1441 // | |
1442 if (call_info.resolved_method()->can_be_statically_bound()) { | |
1443 methodHandle callee_method = SharedRuntime::reresolve_call_site(thread, CHECK_(methodHandle())); | |
1444 if (TraceCallFixup) { | |
1445 RegisterMap reg_map(thread, false); | |
1446 frame caller_frame = thread->last_frame().sender(®_map); | |
1447 ResourceMark rm(thread); | |
1448 tty->print("converting IC miss to reresolve (%s) call to", Bytecodes::name(bc)); | |
1449 callee_method->print_short_name(tty); | |
1450 tty->print_cr(" from pc: " INTPTR_FORMAT, caller_frame.pc()); | |
1451 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1452 } | |
1453 return callee_method; | |
1454 } | |
1455 | |
1456 methodHandle callee_method = call_info.selected_method(); | |
1457 | |
1458 bool should_be_mono = false; | |
1459 | |
1460 #ifndef PRODUCT | |
1461 Atomic::inc(&_ic_miss_ctr); | |
1462 | |
1463 // Statistics & Tracing | |
1464 if (TraceCallFixup) { | |
1465 ResourceMark rm(thread); | |
1466 tty->print("IC miss (%s) call to", Bytecodes::name(bc)); | |
1467 callee_method->print_short_name(tty); | |
1468 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1469 } | |
1470 | |
1471 if (ICMissHistogram) { | |
1472 MutexLocker m(VMStatistic_lock); | |
1473 RegisterMap reg_map(thread, false); | |
1474 frame f = thread->last_frame().real_sender(®_map);// skip runtime stub | |
1475 // produce statistics under the lock | |
1476 trace_ic_miss(f.pc()); | |
1477 } | |
1478 #endif | |
1479 | |
1480 // install an event collector so that when a vtable stub is created the | |
1481 // profiler can be notified via a DYNAMIC_CODE_GENERATED event. The | |
1482 // event can't be posted when the stub is created as locks are held | |
1483 // - instead the event will be deferred until the event collector goes | |
1484 // out of scope. | |
1485 JvmtiDynamicCodeEventCollector event_collector; | |
1486 | |
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1487 // Update inline cache to megamorphic. Skip update if we are called from interpreted. |
0 | 1488 { MutexLocker ml_patch (CompiledIC_lock); |
1489 RegisterMap reg_map(thread, false); | |
1490 frame caller_frame = thread->last_frame().sender(®_map); | |
1491 CodeBlob* cb = caller_frame.cb(); | |
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1492 if (cb->is_nmethod()) { |
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1493 CompiledIC* inline_cache = CompiledIC_before(((nmethod*)cb), caller_frame.pc()); |
0 | 1494 bool should_be_mono = false; |
1495 if (inline_cache->is_optimized()) { | |
1496 if (TraceCallFixup) { | |
1497 ResourceMark rm(thread); | |
1498 tty->print("OPTIMIZED IC miss (%s) call to", Bytecodes::name(bc)); | |
1499 callee_method->print_short_name(tty); | |
1500 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1501 } | |
1502 should_be_mono = true; | |
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1503 } else if (inline_cache->is_icholder_call()) { |
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1504 CompiledICHolder* ic_oop = inline_cache->cached_icholder(); |
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1505 if ( ic_oop != NULL) { |
0 | 1506 |
1507 if (receiver()->klass() == ic_oop->holder_klass()) { | |
1508 // This isn't a real miss. We must have seen that compiled code | |
1509 // is now available and we want the call site converted to a | |
1510 // monomorphic compiled call site. | |
1511 // We can't assert for callee_method->code() != NULL because it | |
1512 // could have been deoptimized in the meantime | |
1513 if (TraceCallFixup) { | |
1514 ResourceMark rm(thread); | |
1515 tty->print("FALSE IC miss (%s) converting to compiled call to", Bytecodes::name(bc)); | |
1516 callee_method->print_short_name(tty); | |
1517 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1518 } | |
1519 should_be_mono = true; | |
1520 } | |
1521 } | |
1522 } | |
1523 | |
1524 if (should_be_mono) { | |
1525 | |
1526 // We have a path that was monomorphic but was going interpreted | |
1527 // and now we have (or had) a compiled entry. We correct the IC | |
1528 // by using a new icBuffer. | |
1529 CompiledICInfo info; | |
1530 KlassHandle receiver_klass(THREAD, receiver()->klass()); | |
1531 inline_cache->compute_monomorphic_entry(callee_method, | |
1532 receiver_klass, | |
1533 inline_cache->is_optimized(), | |
1534 false, | |
1535 info, CHECK_(methodHandle())); | |
1536 inline_cache->set_to_monomorphic(info); | |
1537 } else if (!inline_cache->is_megamorphic() && !inline_cache->is_clean()) { | |
12294 | 1538 // Potential change to megamorphic |
1539 bool successful = inline_cache->set_to_megamorphic(&call_info, bc, CHECK_(methodHandle())); | |
1540 if (!successful) { | |
1541 inline_cache->set_to_clean(); | |
1542 } | |
0 | 1543 } else { |
1544 // Either clean or megamorphic | |
1545 } | |
1546 } | |
1547 } // Release CompiledIC_lock | |
1548 | |
1549 return callee_method; | |
1550 } | |
1551 | |
1552 // | |
1553 // Resets a call-site in compiled code so it will get resolved again. | |
1554 // This routines handles both virtual call sites, optimized virtual call | |
1555 // sites, and static call sites. Typically used to change a call sites | |
1556 // destination from compiled to interpreted. | |
1557 // | |
1558 methodHandle SharedRuntime::reresolve_call_site(JavaThread *thread, TRAPS) { | |
1559 ResourceMark rm(thread); | |
1560 RegisterMap reg_map(thread, false); | |
1561 frame stub_frame = thread->last_frame(); | |
1562 assert(stub_frame.is_runtime_frame(), "must be a runtimeStub"); | |
1563 frame caller = stub_frame.sender(®_map); | |
1564 | |
1565 // Do nothing if the frame isn't a live compiled frame. | |
1566 // nmethod could be deoptimized by the time we get here | |
1567 // so no update to the caller is needed. | |
1568 | |
1569 if (caller.is_compiled_frame() && !caller.is_deoptimized_frame()) { | |
1570 | |
1571 address pc = caller.pc(); | |
1572 | |
1573 // Default call_addr is the location of the "basic" call. | |
1574 // Determine the address of the call we a reresolving. With | |
1575 // Inline Caches we will always find a recognizable call. | |
1576 // With Inline Caches disabled we may or may not find a | |
1577 // recognizable call. We will always find a call for static | |
1578 // calls and for optimized virtual calls. For vanilla virtual | |
1579 // calls it depends on the state of the UseInlineCaches switch. | |
1580 // | |
1581 // With Inline Caches disabled we can get here for a virtual call | |
1582 // for two reasons: | |
1583 // 1 - calling an abstract method. The vtable for abstract methods | |
1584 // will run us thru handle_wrong_method and we will eventually | |
1585 // end up in the interpreter to throw the ame. | |
1586 // 2 - a racing deoptimization. We could be doing a vanilla vtable | |
1587 // call and between the time we fetch the entry address and | |
1588 // we jump to it the target gets deoptimized. Similar to 1 | |
1589 // we will wind up in the interprter (thru a c2i with c2). | |
1590 // | |
1591 address call_addr = NULL; | |
1592 { | |
1593 // Get call instruction under lock because another thread may be | |
1594 // busy patching it. | |
1595 MutexLockerEx ml_patch(Patching_lock, Mutex::_no_safepoint_check_flag); | |
1596 // Location of call instruction | |
1597 if (NativeCall::is_call_before(pc)) { | |
1598 NativeCall *ncall = nativeCall_before(pc); | |
1599 call_addr = ncall->instruction_address(); | |
1600 } | |
1601 } | |
1602 | |
1603 // Check for static or virtual call | |
1604 bool is_static_call = false; | |
1605 nmethod* caller_nm = CodeCache::find_nmethod(pc); | |
1606 // Make sure nmethod doesn't get deoptimized and removed until | |
1607 // this is done with it. | |
1608 // CLEANUP - with lazy deopt shouldn't need this lock | |
1609 nmethodLocker nmlock(caller_nm); | |
1610 | |
1611 if (call_addr != NULL) { | |
1612 RelocIterator iter(caller_nm, call_addr, call_addr+1); | |
1613 int ret = iter.next(); // Get item | |
1614 if (ret) { | |
1615 assert(iter.addr() == call_addr, "must find call"); | |
1616 if (iter.type() == relocInfo::static_call_type) { | |
1617 is_static_call = true; | |
1618 } else { | |
1619 assert(iter.type() == relocInfo::virtual_call_type || | |
1620 iter.type() == relocInfo::opt_virtual_call_type | |
1621 , "unexpected relocInfo. type"); | |
1622 } | |
1623 } else { | |
1624 assert(!UseInlineCaches, "relocation info. must exist for this address"); | |
1625 } | |
1626 | |
1627 // Cleaning the inline cache will force a new resolve. This is more robust | |
1628 // than directly setting it to the new destination, since resolving of calls | |
1629 // is always done through the same code path. (experience shows that it | |
1630 // leads to very hard to track down bugs, if an inline cache gets updated | |
1631 // to a wrong method). It should not be performance critical, since the | |
1632 // resolve is only done once. | |
1633 | |
1634 MutexLocker ml(CompiledIC_lock); | |
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1635 if (is_static_call) { |
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1636 CompiledStaticCall* ssc= compiledStaticCall_at(call_addr); |
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1637 ssc->set_to_clean(); |
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1638 } else { |
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1639 // compiled, dispatched call (which used to call an interpreted method) |
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1640 CompiledIC* inline_cache = CompiledIC_at(caller_nm, call_addr); |
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1641 inline_cache->set_to_clean(); |
0 | 1642 } |
1643 } | |
1644 | |
1645 } | |
1646 | |
1647 methodHandle callee_method = find_callee_method(thread, CHECK_(methodHandle())); | |
1648 | |
1649 | |
1650 #ifndef PRODUCT | |
1651 Atomic::inc(&_wrong_method_ctr); | |
1652 | |
1653 if (TraceCallFixup) { | |
1654 ResourceMark rm(thread); | |
1655 tty->print("handle_wrong_method reresolving call to"); | |
1656 callee_method->print_short_name(tty); | |
1657 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1658 } | |
1659 #endif | |
1660 | |
1661 return callee_method; | |
1662 } | |
1663 | |
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1664 #ifdef ASSERT |
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1665 void SharedRuntime::check_member_name_argument_is_last_argument(methodHandle method, |
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1666 const BasicType* sig_bt, |
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1667 const VMRegPair* regs) { |
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1668 ResourceMark rm; |
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1669 const int total_args_passed = method->size_of_parameters(); |
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1670 const VMRegPair* regs_with_member_name = regs; |
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1671 VMRegPair* regs_without_member_name = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed - 1); |
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1672 |
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1673 const int member_arg_pos = total_args_passed - 1; |
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1674 assert(member_arg_pos >= 0 && member_arg_pos < total_args_passed, "oob"); |
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1675 assert(sig_bt[member_arg_pos] == T_OBJECT, "dispatch argument must be an object"); |
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1676 |
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1677 const bool is_outgoing = method->is_method_handle_intrinsic(); |
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1678 int comp_args_on_stack = java_calling_convention(sig_bt, regs_without_member_name, total_args_passed - 1, is_outgoing); |
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1679 |
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1680 for (int i = 0; i < member_arg_pos; i++) { |
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1681 VMReg a = regs_with_member_name[i].first(); |
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1682 VMReg b = regs_without_member_name[i].first(); |
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1683 assert(a->value() == b->value(), err_msg_res("register allocation mismatch: a=%d, b=%d", a->value(), b->value())); |
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1684 } |
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1685 assert(regs_with_member_name[member_arg_pos].first()->is_valid(), "bad member arg"); |
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1686 } |
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1687 #endif |
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1688 |
0 | 1689 // --------------------------------------------------------------------------- |
1690 // We are calling the interpreter via a c2i. Normally this would mean that | |
1691 // we were called by a compiled method. However we could have lost a race | |
1692 // where we went int -> i2c -> c2i and so the caller could in fact be | |
1205 | 1693 // interpreted. If the caller is compiled we attempt to patch the caller |
0 | 1694 // so he no longer calls into the interpreter. |
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1695 IRT_LEAF(void, SharedRuntime::fixup_callers_callsite(Method* method, address caller_pc)) |
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1696 Method* moop(method); |
0 | 1697 |
1698 address entry_point = moop->from_compiled_entry(); | |
1699 | |
1700 // It's possible that deoptimization can occur at a call site which hasn't | |
1701 // been resolved yet, in which case this function will be called from | |
1702 // an nmethod that has been patched for deopt and we can ignore the | |
1703 // request for a fixup. | |
1704 // Also it is possible that we lost a race in that from_compiled_entry | |
1705 // is now back to the i2c in that case we don't need to patch and if | |
1706 // we did we'd leap into space because the callsite needs to use | |
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1707 // "to interpreter" stub in order to load up the Method*. Don't |
0 | 1708 // ask me how I know this... |
1709 | |
1710 CodeBlob* cb = CodeCache::find_blob(caller_pc); | |
1205 | 1711 if (!cb->is_nmethod() || entry_point == moop->get_c2i_entry()) { |
1712 return; | |
1713 } | |
1714 | |
1715 // The check above makes sure this is a nmethod. | |
1716 nmethod* nm = cb->as_nmethod_or_null(); | |
1717 assert(nm, "must be"); | |
1718 | |
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1719 // Get the return PC for the passed caller PC. |
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1720 address return_pc = caller_pc + frame::pc_return_offset; |
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1721 |
0 | 1722 // There is a benign race here. We could be attempting to patch to a compiled |
1723 // entry point at the same time the callee is being deoptimized. If that is | |
1724 // the case then entry_point may in fact point to a c2i and we'd patch the | |
1725 // call site with the same old data. clear_code will set code() to NULL | |
1726 // at the end of it. If we happen to see that NULL then we can skip trying | |
1727 // to patch. If we hit the window where the callee has a c2i in the | |
1728 // from_compiled_entry and the NULL isn't present yet then we lose the race | |
1729 // and patch the code with the same old data. Asi es la vida. | |
1730 | |
1731 if (moop->code() == NULL) return; | |
1732 | |
1205 | 1733 if (nm->is_in_use()) { |
0 | 1734 |
1735 // Expect to find a native call there (unless it was no-inline cache vtable dispatch) | |
1736 MutexLockerEx ml_patch(Patching_lock, Mutex::_no_safepoint_check_flag); | |
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1737 if (NativeCall::is_call_before(return_pc)) { |
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1738 NativeCall *call = nativeCall_before(return_pc); |
0 | 1739 // |
1740 // bug 6281185. We might get here after resolving a call site to a vanilla | |
1741 // virtual call. Because the resolvee uses the verified entry it may then | |
1742 // see compiled code and attempt to patch the site by calling us. This would | |
1743 // then incorrectly convert the call site to optimized and its downhill from | |
1744 // there. If you're lucky you'll get the assert in the bugid, if not you've | |
1745 // just made a call site that could be megamorphic into a monomorphic site | |
1746 // for the rest of its life! Just another racing bug in the life of | |
1747 // fixup_callers_callsite ... | |
1748 // | |
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1749 RelocIterator iter(nm, call->instruction_address(), call->next_instruction_address()); |
0 | 1750 iter.next(); |
1751 assert(iter.has_current(), "must have a reloc at java call site"); | |
1752 relocInfo::relocType typ = iter.reloc()->type(); | |
1753 if ( typ != relocInfo::static_call_type && | |
1754 typ != relocInfo::opt_virtual_call_type && | |
1755 typ != relocInfo::static_stub_type) { | |
1756 return; | |
1757 } | |
1758 address destination = call->destination(); | |
1759 if (destination != entry_point) { | |
1760 CodeBlob* callee = CodeCache::find_blob(destination); | |
1761 // callee == cb seems weird. It means calling interpreter thru stub. | |
1762 if (callee == cb || callee->is_adapter_blob()) { | |
1763 // static call or optimized virtual | |
1764 if (TraceCallFixup) { | |
1204 | 1765 tty->print("fixup callsite at " INTPTR_FORMAT " to compiled code for", caller_pc); |
0 | 1766 moop->print_short_name(tty); |
1767 tty->print_cr(" to " INTPTR_FORMAT, entry_point); | |
1768 } | |
1769 call->set_destination_mt_safe(entry_point); | |
1770 } else { | |
1771 if (TraceCallFixup) { | |
1772 tty->print("failed to fixup callsite at " INTPTR_FORMAT " to compiled code for", caller_pc); | |
1773 moop->print_short_name(tty); | |
1774 tty->print_cr(" to " INTPTR_FORMAT, entry_point); | |
1775 } | |
1776 // assert is too strong could also be resolve destinations. | |
1777 // assert(InlineCacheBuffer::contains(destination) || VtableStubs::contains(destination), "must be"); | |
1778 } | |
1779 } else { | |
1780 if (TraceCallFixup) { | |
1204 | 1781 tty->print("already patched callsite at " INTPTR_FORMAT " to compiled code for", caller_pc); |
0 | 1782 moop->print_short_name(tty); |
1783 tty->print_cr(" to " INTPTR_FORMAT, entry_point); | |
1784 } | |
1785 } | |
1786 } | |
1787 } | |
1788 IRT_END | |
1789 | |
1790 | |
1791 // same as JVM_Arraycopy, but called directly from compiled code | |
1792 JRT_ENTRY(void, SharedRuntime::slow_arraycopy_C(oopDesc* src, jint src_pos, | |
1793 oopDesc* dest, jint dest_pos, | |
1794 jint length, | |
1795 JavaThread* thread)) { | |
1796 #ifndef PRODUCT | |
1797 _slow_array_copy_ctr++; | |
1798 #endif | |
1799 // Check if we have null pointers | |
1800 if (src == NULL || dest == NULL) { | |
1801 THROW(vmSymbols::java_lang_NullPointerException()); | |
1802 } | |
1803 // Do the copy. The casts to arrayOop are necessary to the copy_array API, | |
1804 // even though the copy_array API also performs dynamic checks to ensure | |
1805 // that src and dest are truly arrays (and are conformable). | |
1806 // The copy_array mechanism is awkward and could be removed, but | |
1807 // the compilers don't call this function except as a last resort, | |
1808 // so it probably doesn't matter. | |
6983 | 1809 src->klass()->copy_array((arrayOopDesc*)src, src_pos, |
0 | 1810 (arrayOopDesc*)dest, dest_pos, |
1811 length, thread); | |
1812 } | |
1813 JRT_END | |
1814 | |
1815 char* SharedRuntime::generate_class_cast_message( | |
1816 JavaThread* thread, const char* objName) { | |
1817 | |
1818 // Get target class name from the checkcast instruction | |
1819 vframeStream vfst(thread, true); | |
1820 assert(!vfst.at_end(), "Java frame must exist"); | |
2142 | 1821 Bytecode_checkcast cc(vfst.method(), vfst.method()->bcp_from(vfst.bci())); |
6983 | 1822 Klass* targetKlass = vfst.method()->constants()->klass_at( |
1823 cc.index(), thread); | |
0 | 1824 return generate_class_cast_message(objName, targetKlass->external_name()); |
1825 } | |
1826 | |
1827 char* SharedRuntime::generate_class_cast_message( | |
710 | 1828 const char* objName, const char* targetKlassName, const char* desc) { |
0 | 1829 size_t msglen = strlen(objName) + strlen(desc) + strlen(targetKlassName) + 1; |
1830 | |
53 | 1831 char* message = NEW_RESOURCE_ARRAY(char, msglen); |
0 | 1832 if (NULL == message) { |
53 | 1833 // Shouldn't happen, but don't cause even more problems if it does |
0 | 1834 message = const_cast<char*>(objName); |
1835 } else { | |
1836 jio_snprintf(message, msglen, "%s%s%s", objName, desc, targetKlassName); | |
1837 } | |
1838 return message; | |
1839 } | |
1840 | |
1841 JRT_LEAF(void, SharedRuntime::reguard_yellow_pages()) | |
1842 (void) JavaThread::current()->reguard_stack(); | |
1843 JRT_END | |
1844 | |
1845 | |
1846 // Handles the uncommon case in locking, i.e., contention or an inflated lock. | |
1847 #ifndef PRODUCT | |
1848 int SharedRuntime::_monitor_enter_ctr=0; | |
1849 #endif | |
1850 JRT_ENTRY_NO_ASYNC(void, SharedRuntime::complete_monitor_locking_C(oopDesc* _obj, BasicLock* lock, JavaThread* thread)) | |
1851 oop obj(_obj); | |
1852 #ifndef PRODUCT | |
1853 _monitor_enter_ctr++; // monitor enter slow | |
1854 #endif | |
1855 if (PrintBiasedLockingStatistics) { | |
1856 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); | |
1857 } | |
1858 Handle h_obj(THREAD, obj); | |
1859 if (UseBiasedLocking) { | |
1860 // Retry fast entry if bias is revoked to avoid unnecessary inflation | |
1861 ObjectSynchronizer::fast_enter(h_obj, lock, true, CHECK); | |
1862 } else { | |
1863 ObjectSynchronizer::slow_enter(h_obj, lock, CHECK); | |
1864 } | |
1865 assert(!HAS_PENDING_EXCEPTION, "Should have no exception here"); | |
1866 JRT_END | |
1867 | |
1868 #ifndef PRODUCT | |
1869 int SharedRuntime::_monitor_exit_ctr=0; | |
1870 #endif | |
1871 // Handles the uncommon cases of monitor unlocking in compiled code | |
1872 JRT_LEAF(void, SharedRuntime::complete_monitor_unlocking_C(oopDesc* _obj, BasicLock* lock)) | |
1873 oop obj(_obj); | |
1874 #ifndef PRODUCT | |
1875 _monitor_exit_ctr++; // monitor exit slow | |
1876 #endif | |
1877 Thread* THREAD = JavaThread::current(); | |
1878 // I'm not convinced we need the code contained by MIGHT_HAVE_PENDING anymore | |
1879 // testing was unable to ever fire the assert that guarded it so I have removed it. | |
1880 assert(!HAS_PENDING_EXCEPTION, "Do we need code below anymore?"); | |
1881 #undef MIGHT_HAVE_PENDING | |
1882 #ifdef MIGHT_HAVE_PENDING | |
1883 // Save and restore any pending_exception around the exception mark. | |
1884 // While the slow_exit must not throw an exception, we could come into | |
1885 // this routine with one set. | |
1886 oop pending_excep = NULL; | |
1887 const char* pending_file; | |
1888 int pending_line; | |
1889 if (HAS_PENDING_EXCEPTION) { | |
1890 pending_excep = PENDING_EXCEPTION; | |
1891 pending_file = THREAD->exception_file(); | |
1892 pending_line = THREAD->exception_line(); | |
1893 CLEAR_PENDING_EXCEPTION; | |
1894 } | |
1895 #endif /* MIGHT_HAVE_PENDING */ | |
1896 | |
1897 { | |
1898 // Exit must be non-blocking, and therefore no exceptions can be thrown. | |
1899 EXCEPTION_MARK; | |
1900 ObjectSynchronizer::slow_exit(obj, lock, THREAD); | |
1901 } | |
1902 | |
1903 #ifdef MIGHT_HAVE_PENDING | |
1904 if (pending_excep != NULL) { | |
1905 THREAD->set_pending_exception(pending_excep, pending_file, pending_line); | |
1906 } | |
1907 #endif /* MIGHT_HAVE_PENDING */ | |
1908 JRT_END | |
1909 | |
1910 #ifndef PRODUCT | |
1911 | |
1912 void SharedRuntime::print_statistics() { | |
1913 ttyLocker ttyl; | |
1914 if (xtty != NULL) xtty->head("statistics type='SharedRuntime'"); | |
1915 | |
1916 if (_monitor_enter_ctr ) tty->print_cr("%5d monitor enter slow", _monitor_enter_ctr); | |
1917 if (_monitor_exit_ctr ) tty->print_cr("%5d monitor exit slow", _monitor_exit_ctr); | |
1918 if (_throw_null_ctr) tty->print_cr("%5d implicit null throw", _throw_null_ctr); | |
1919 | |
1920 SharedRuntime::print_ic_miss_histogram(); | |
1921 | |
1922 if (CountRemovableExceptions) { | |
1923 if (_nof_removable_exceptions > 0) { | |
1924 Unimplemented(); // this counter is not yet incremented | |
1925 tty->print_cr("Removable exceptions: %d", _nof_removable_exceptions); | |
1926 } | |
1927 } | |
1928 | |
1929 // Dump the JRT_ENTRY counters | |
1930 if( _new_instance_ctr ) tty->print_cr("%5d new instance requires GC", _new_instance_ctr); | |
1931 if( _new_array_ctr ) tty->print_cr("%5d new array requires GC", _new_array_ctr); | |
1932 if( _multi1_ctr ) tty->print_cr("%5d multianewarray 1 dim", _multi1_ctr); | |
1933 if( _multi2_ctr ) tty->print_cr("%5d multianewarray 2 dim", _multi2_ctr); | |
1934 if( _multi3_ctr ) tty->print_cr("%5d multianewarray 3 dim", _multi3_ctr); | |
1935 if( _multi4_ctr ) tty->print_cr("%5d multianewarray 4 dim", _multi4_ctr); | |
1936 if( _multi5_ctr ) tty->print_cr("%5d multianewarray 5 dim", _multi5_ctr); | |
1937 | |
1938 tty->print_cr("%5d inline cache miss in compiled", _ic_miss_ctr ); | |
1939 tty->print_cr("%5d wrong method", _wrong_method_ctr ); | |
1940 tty->print_cr("%5d unresolved static call site", _resolve_static_ctr ); | |
1941 tty->print_cr("%5d unresolved virtual call site", _resolve_virtual_ctr ); | |
1942 tty->print_cr("%5d unresolved opt virtual call site", _resolve_opt_virtual_ctr ); | |
1943 | |
1944 if( _mon_enter_stub_ctr ) tty->print_cr("%5d monitor enter stub", _mon_enter_stub_ctr ); | |
1945 if( _mon_exit_stub_ctr ) tty->print_cr("%5d monitor exit stub", _mon_exit_stub_ctr ); | |
1946 if( _mon_enter_ctr ) tty->print_cr("%5d monitor enter slow", _mon_enter_ctr ); | |
1947 if( _mon_exit_ctr ) tty->print_cr("%5d monitor exit slow", _mon_exit_ctr ); | |
1948 if( _partial_subtype_ctr) tty->print_cr("%5d slow partial subtype", _partial_subtype_ctr ); | |
1949 if( _jbyte_array_copy_ctr ) tty->print_cr("%5d byte array copies", _jbyte_array_copy_ctr ); | |
1950 if( _jshort_array_copy_ctr ) tty->print_cr("%5d short array copies", _jshort_array_copy_ctr ); | |
1951 if( _jint_array_copy_ctr ) tty->print_cr("%5d int array copies", _jint_array_copy_ctr ); | |
1952 if( _jlong_array_copy_ctr ) tty->print_cr("%5d long array copies", _jlong_array_copy_ctr ); | |
1953 if( _oop_array_copy_ctr ) tty->print_cr("%5d oop array copies", _oop_array_copy_ctr ); | |
1954 if( _checkcast_array_copy_ctr ) tty->print_cr("%5d checkcast array copies", _checkcast_array_copy_ctr ); | |
1955 if( _unsafe_array_copy_ctr ) tty->print_cr("%5d unsafe array copies", _unsafe_array_copy_ctr ); | |
1956 if( _generic_array_copy_ctr ) tty->print_cr("%5d generic array copies", _generic_array_copy_ctr ); | |
1957 if( _slow_array_copy_ctr ) tty->print_cr("%5d slow array copies", _slow_array_copy_ctr ); | |
1958 if( _find_handler_ctr ) tty->print_cr("%5d find exception handler", _find_handler_ctr ); | |
1959 if( _rethrow_ctr ) tty->print_cr("%5d rethrow handler", _rethrow_ctr ); | |
1960 | |
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1961 AdapterHandlerLibrary::print_statistics(); |
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1962 |
0 | 1963 if (xtty != NULL) xtty->tail("statistics"); |
1964 } | |
1965 | |
1966 inline double percent(int x, int y) { | |
1967 return 100.0 * x / MAX2(y, 1); | |
1968 } | |
1969 | |
1970 class MethodArityHistogram { | |
1971 public: | |
1972 enum { MAX_ARITY = 256 }; | |
1973 private: | |
1974 static int _arity_histogram[MAX_ARITY]; // histogram of #args | |
1975 static int _size_histogram[MAX_ARITY]; // histogram of arg size in words | |
1976 static int _max_arity; // max. arity seen | |
1977 static int _max_size; // max. arg size seen | |
1978 | |
1979 static void add_method_to_histogram(nmethod* nm) { | |
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1980 Method* m = nm->method(); |
0 | 1981 ArgumentCount args(m->signature()); |
1982 int arity = args.size() + (m->is_static() ? 0 : 1); | |
1983 int argsize = m->size_of_parameters(); | |
1984 arity = MIN2(arity, MAX_ARITY-1); | |
1985 argsize = MIN2(argsize, MAX_ARITY-1); | |
1986 int count = nm->method()->compiled_invocation_count(); | |
1987 _arity_histogram[arity] += count; | |
1988 _size_histogram[argsize] += count; | |
1989 _max_arity = MAX2(_max_arity, arity); | |
1990 _max_size = MAX2(_max_size, argsize); | |
1991 } | |
1992 | |
1993 void print_histogram_helper(int n, int* histo, const char* name) { | |
1994 const int N = MIN2(5, n); | |
1995 tty->print_cr("\nHistogram of call arity (incl. rcvr, calls to compiled methods only):"); | |
1996 double sum = 0; | |
1997 double weighted_sum = 0; | |
1998 int i; | |
1999 for (i = 0; i <= n; i++) { sum += histo[i]; weighted_sum += i*histo[i]; } | |
2000 double rest = sum; | |
2001 double percent = sum / 100; | |
2002 for (i = 0; i <= N; i++) { | |
2003 rest -= histo[i]; | |
2004 tty->print_cr("%4d: %7d (%5.1f%%)", i, histo[i], histo[i] / percent); | |
2005 } | |
2006 tty->print_cr("rest: %7d (%5.1f%%))", (int)rest, rest / percent); | |
2007 tty->print_cr("(avg. %s = %3.1f, max = %d)", name, weighted_sum / sum, n); | |
2008 } | |
2009 | |
2010 void print_histogram() { | |
2011 tty->print_cr("\nHistogram of call arity (incl. rcvr, calls to compiled methods only):"); | |
2012 print_histogram_helper(_max_arity, _arity_histogram, "arity"); | |
2013 tty->print_cr("\nSame for parameter size (in words):"); | |
2014 print_histogram_helper(_max_size, _size_histogram, "size"); | |
2015 tty->cr(); | |
2016 } | |
2017 | |
2018 public: | |
2019 MethodArityHistogram() { | |
2020 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
2021 _max_arity = _max_size = 0; | |
2022 for (int i = 0; i < MAX_ARITY; i++) _arity_histogram[i] = _size_histogram [i] = 0; | |
2023 CodeCache::nmethods_do(add_method_to_histogram); | |
2024 print_histogram(); | |
2025 } | |
2026 }; | |
2027 | |
2028 int MethodArityHistogram::_arity_histogram[MethodArityHistogram::MAX_ARITY]; | |
2029 int MethodArityHistogram::_size_histogram[MethodArityHistogram::MAX_ARITY]; | |
2030 int MethodArityHistogram::_max_arity; | |
2031 int MethodArityHistogram::_max_size; | |
2032 | |
2033 void SharedRuntime::print_call_statistics(int comp_total) { | |
2034 tty->print_cr("Calls from compiled code:"); | |
2035 int total = _nof_normal_calls + _nof_interface_calls + _nof_static_calls; | |
2036 int mono_c = _nof_normal_calls - _nof_optimized_calls - _nof_megamorphic_calls; | |
2037 int mono_i = _nof_interface_calls - _nof_optimized_interface_calls - _nof_megamorphic_interface_calls; | |
2038 tty->print_cr("\t%9d (%4.1f%%) total non-inlined ", total, percent(total, total)); | |
2039 tty->print_cr("\t%9d (%4.1f%%) virtual calls ", _nof_normal_calls, percent(_nof_normal_calls, total)); | |
2040 tty->print_cr("\t %9d (%3.0f%%) inlined ", _nof_inlined_calls, percent(_nof_inlined_calls, _nof_normal_calls)); | |
2041 tty->print_cr("\t %9d (%3.0f%%) optimized ", _nof_optimized_calls, percent(_nof_optimized_calls, _nof_normal_calls)); | |
2042 tty->print_cr("\t %9d (%3.0f%%) monomorphic ", mono_c, percent(mono_c, _nof_normal_calls)); | |
2043 tty->print_cr("\t %9d (%3.0f%%) megamorphic ", _nof_megamorphic_calls, percent(_nof_megamorphic_calls, _nof_normal_calls)); | |
2044 tty->print_cr("\t%9d (%4.1f%%) interface calls ", _nof_interface_calls, percent(_nof_interface_calls, total)); | |
2045 tty->print_cr("\t %9d (%3.0f%%) inlined ", _nof_inlined_interface_calls, percent(_nof_inlined_interface_calls, _nof_interface_calls)); | |
2046 tty->print_cr("\t %9d (%3.0f%%) optimized ", _nof_optimized_interface_calls, percent(_nof_optimized_interface_calls, _nof_interface_calls)); | |
2047 tty->print_cr("\t %9d (%3.0f%%) monomorphic ", mono_i, percent(mono_i, _nof_interface_calls)); | |
2048 tty->print_cr("\t %9d (%3.0f%%) megamorphic ", _nof_megamorphic_interface_calls, percent(_nof_megamorphic_interface_calls, _nof_interface_calls)); | |
2049 tty->print_cr("\t%9d (%4.1f%%) static/special calls", _nof_static_calls, percent(_nof_static_calls, total)); | |
2050 tty->print_cr("\t %9d (%3.0f%%) inlined ", _nof_inlined_static_calls, percent(_nof_inlined_static_calls, _nof_static_calls)); | |
2051 tty->cr(); | |
2052 tty->print_cr("Note 1: counter updates are not MT-safe."); | |
2053 tty->print_cr("Note 2: %% in major categories are relative to total non-inlined calls;"); | |
2054 tty->print_cr(" %% in nested categories are relative to their category"); | |
2055 tty->print_cr(" (and thus add up to more than 100%% with inlining)"); | |
2056 tty->cr(); | |
2057 | |
2058 MethodArityHistogram h; | |
2059 } | |
2060 #endif | |
2061 | |
2062 | |
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2063 // A simple wrapper class around the calling convention information |
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2064 // that allows sharing of adapters for the same calling convention. |
6197 | 2065 class AdapterFingerPrint : public CHeapObj<mtCode> { |
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2066 private: |
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2067 enum { |
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2068 _basic_type_bits = 4, |
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2069 _basic_type_mask = right_n_bits(_basic_type_bits), |
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2070 _basic_types_per_int = BitsPerInt / _basic_type_bits, |
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2071 _compact_int_count = 3 |
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2072 }; |
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2073 // TO DO: Consider integrating this with a more global scheme for compressing signatures. |
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2074 // For now, 4 bits per components (plus T_VOID gaps after double/long) is not excessive. |
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2075 |
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2076 union { |
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2077 int _compact[_compact_int_count]; |
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2078 int* _fingerprint; |
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2079 } _value; |
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2080 int _length; // A negative length indicates the fingerprint is in the compact form, |
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2081 // Otherwise _value._fingerprint is the array. |
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2082 |
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2083 // Remap BasicTypes that are handled equivalently by the adapters. |
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2084 // These are correct for the current system but someday it might be |
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2085 // necessary to make this mapping platform dependent. |
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2086 static int adapter_encoding(BasicType in) { |
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2087 switch(in) { |
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2088 case T_BOOLEAN: |
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2089 case T_BYTE: |
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2090 case T_SHORT: |
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2091 case T_CHAR: |
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2092 // There are all promoted to T_INT in the calling convention |
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2093 return T_INT; |
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2094 |
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2095 case T_OBJECT: |
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2096 case T_ARRAY: |
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2097 // In other words, we assume that any register good enough for |
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2098 // an int or long is good enough for a managed pointer. |
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2099 #ifdef _LP64 |
1506 | 2100 return T_LONG; |
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2101 #else |
1506 | 2102 return T_INT; |
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2103 #endif |
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2104 |
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2105 case T_INT: |
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2106 case T_LONG: |
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2107 case T_FLOAT: |
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2108 case T_DOUBLE: |
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2109 case T_VOID: |
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2110 return in; |
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2111 |
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2112 default: |
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2113 ShouldNotReachHere(); |
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2114 return T_CONFLICT; |
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2115 } |
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2116 } |
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2117 |
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2118 public: |
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2119 AdapterFingerPrint(int total_args_passed, BasicType* sig_bt) { |
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2120 // The fingerprint is based on the BasicType signature encoded |
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2121 // into an array of ints with eight entries per int. |
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2122 int* ptr; |
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2123 int len = (total_args_passed + (_basic_types_per_int-1)) / _basic_types_per_int; |
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2124 if (len <= _compact_int_count) { |
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2125 assert(_compact_int_count == 3, "else change next line"); |
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2126 _value._compact[0] = _value._compact[1] = _value._compact[2] = 0; |
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2127 // Storing the signature encoded as signed chars hits about 98% |
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2128 // of the time. |
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2129 _length = -len; |
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2130 ptr = _value._compact; |
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2131 } else { |
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2132 _length = len; |
6197 | 2133 _value._fingerprint = NEW_C_HEAP_ARRAY(int, _length, mtCode); |
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2134 ptr = _value._fingerprint; |
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2135 } |
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2136 |
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2137 // Now pack the BasicTypes with 8 per int |
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2138 int sig_index = 0; |
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2139 for (int index = 0; index < len; index++) { |
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2140 int value = 0; |
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2141 for (int byte = 0; byte < _basic_types_per_int; byte++) { |
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2142 int bt = ((sig_index < total_args_passed) |
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2143 ? adapter_encoding(sig_bt[sig_index++]) |
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2144 : 0); |
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2145 assert((bt & _basic_type_mask) == bt, "must fit in 4 bits"); |
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2146 value = (value << _basic_type_bits) | bt; |
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2147 } |
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2148 ptr[index] = value; |
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2149 } |
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2150 } |
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2151 |
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2152 ~AdapterFingerPrint() { |
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2153 if (_length > 0) { |
6197 | 2154 FREE_C_HEAP_ARRAY(int, _value._fingerprint, mtCode); |
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2155 } |
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2156 } |
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2157 |
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2158 int value(int index) { |
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2159 if (_length < 0) { |
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2160 return _value._compact[index]; |
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2161 } |
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2162 return _value._fingerprint[index]; |
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2163 } |
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|
2164 int length() { |
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|
2165 if (_length < 0) return -_length; |
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6911204: generated adapters with large signatures can fill up the code cache
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|
2166 return _length; |
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diff
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|
2167 } |
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diff
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|
2168 |
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|
2169 bool is_compact() { |
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|
2170 return _length <= 0; |
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|
2171 } |
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diff
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|
2172 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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|
2173 unsigned int compute_hash() { |
1207
74c848d437ab
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diff
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|
2174 int hash = 0; |
1187
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|
2175 for (int i = 0; i < length(); i++) { |
1207
74c848d437ab
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|
2176 int v = value(i); |
1187
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|
2177 hash = (hash << 8) ^ v ^ (hash >> 5); |
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|
2178 } |
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diff
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|
2179 return (unsigned int)hash; |
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|
2180 } |
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diff
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|
2181 |
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diff
changeset
|
2182 const char* as_string() { |
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changeset
|
2183 stringStream st; |
3841
0f34fdee809e
7071427: AdapterFingerPrint can hold 8 entries per int
never
parents:
3781
diff
changeset
|
2184 st.print("0x"); |
1187
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changeset
|
2185 for (int i = 0; i < length(); i++) { |
3841
0f34fdee809e
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never
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|
2186 st.print("%08x", value(i)); |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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|
2187 } |
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diff
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|
2188 return st.as_string(); |
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|
2189 } |
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diff
changeset
|
2190 |
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changeset
|
2191 bool equals(AdapterFingerPrint* other) { |
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|
2192 if (other->_length != _length) { |
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|
2193 return false; |
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|
2194 } |
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changeset
|
2195 if (_length < 0) { |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
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|
2196 assert(_compact_int_count == 3, "else change next line"); |
1207
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|
2197 return _value._compact[0] == other->_value._compact[0] && |
74c848d437ab
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|
2198 _value._compact[1] == other->_value._compact[1] && |
74c848d437ab
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|
2199 _value._compact[2] == other->_value._compact[2]; |
1187
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|
2200 } else { |
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|
2201 for (int i = 0; i < _length; i++) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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|
2202 if (_value._fingerprint[i] != other->_value._fingerprint[i]) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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|
2203 return false; |
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changeset
|
2204 } |
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|
2205 } |
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|
2206 } |
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diff
changeset
|
2207 return true; |
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changeset
|
2208 } |
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diff
changeset
|
2209 }; |
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changeset
|
2210 |
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changeset
|
2211 |
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changeset
|
2212 // A hashtable mapping from AdapterFingerPrints to AdapterHandlerEntries |
6197 | 2213 class AdapterHandlerTable : public BasicHashtable<mtCode> { |
1187
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diff
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|
2214 friend class AdapterHandlerTableIterator; |
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diff
changeset
|
2215 |
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diff
changeset
|
2216 private: |
cf0685d550f1
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diff
changeset
|
2217 |
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
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1257
diff
changeset
|
2218 #ifndef PRODUCT |
1187
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6911204: generated adapters with large signatures can fill up the code cache
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changeset
|
2219 static int _lookups; // number of calls to lookup |
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|
2220 static int _buckets; // number of buckets checked |
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|
2221 static int _equals; // number of buckets checked with matching hash |
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|
2222 static int _hits; // number of successful lookups |
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|
2223 static int _compact; // number of equals calls with compact signature |
cf0685d550f1
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|
2224 #endif |
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diff
changeset
|
2225 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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changeset
|
2226 AdapterHandlerEntry* bucket(int i) { |
6197 | 2227 return (AdapterHandlerEntry*)BasicHashtable<mtCode>::bucket(i); |
1187
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|
2228 } |
cf0685d550f1
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diff
changeset
|
2229 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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diff
changeset
|
2230 public: |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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1142
diff
changeset
|
2231 AdapterHandlerTable() |
6197 | 2232 : BasicHashtable<mtCode>(293, sizeof(AdapterHandlerEntry)) { } |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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diff
changeset
|
2233 |
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diff
changeset
|
2234 // Create a new entry suitable for insertion in the table |
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6911204: generated adapters with large signatures can fill up the code cache
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diff
changeset
|
2235 AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_unverified_entry) { |
6197 | 2236 AdapterHandlerEntry* entry = (AdapterHandlerEntry*)BasicHashtable<mtCode>::new_entry(fingerprint->compute_hash()); |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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changeset
|
2237 entry->init(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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diff
changeset
|
2238 return entry; |
cf0685d550f1
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diff
changeset
|
2239 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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parents:
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diff
changeset
|
2240 |
cf0685d550f1
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diff
changeset
|
2241 // Insert an entry into the table |
cf0685d550f1
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diff
changeset
|
2242 void add(AdapterHandlerEntry* entry) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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diff
changeset
|
2243 int index = hash_to_index(entry->hash()); |
cf0685d550f1
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parents:
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diff
changeset
|
2244 add_entry(index, entry); |
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diff
changeset
|
2245 } |
cf0685d550f1
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diff
changeset
|
2246 |
1207
74c848d437ab
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|
2247 void free_entry(AdapterHandlerEntry* entry) { |
74c848d437ab
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diff
changeset
|
2248 entry->deallocate(); |
6197 | 2249 BasicHashtable<mtCode>::free_entry(entry); |
1207
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|
2250 } |
74c848d437ab
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never
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1205
diff
changeset
|
2251 |
1187
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changeset
|
2252 // Find a entry with the same fingerprint if it exists |
1207
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diff
changeset
|
2253 AdapterHandlerEntry* lookup(int total_args_passed, BasicType* sig_bt) { |
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
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1257
diff
changeset
|
2254 NOT_PRODUCT(_lookups++); |
1207
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
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diff
changeset
|
2255 AdapterFingerPrint fp(total_args_passed, sig_bt); |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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diff
changeset
|
2256 unsigned int hash = fp.compute_hash(); |
cf0685d550f1
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1142
diff
changeset
|
2257 int index = hash_to_index(hash); |
cf0685d550f1
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never
parents:
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diff
changeset
|
2258 for (AdapterHandlerEntry* e = bucket(index); e != NULL; e = e->next()) { |
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
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diff
changeset
|
2259 NOT_PRODUCT(_buckets++); |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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changeset
|
2260 if (e->hash() == hash) { |
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
parents:
1257
diff
changeset
|
2261 NOT_PRODUCT(_equals++); |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2262 if (fp.equals(e->fingerprint())) { |
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
parents:
1257
diff
changeset
|
2263 #ifndef PRODUCT |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2264 if (fp.is_compact()) _compact++; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
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diff
changeset
|
2265 _hits++; |
cf0685d550f1
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diff
changeset
|
2266 #endif |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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diff
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|
2267 return e; |
cf0685d550f1
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never
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diff
changeset
|
2268 } |
cf0685d550f1
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parents:
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diff
changeset
|
2269 } |
cf0685d550f1
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parents:
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diff
changeset
|
2270 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
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diff
changeset
|
2271 return NULL; |
cf0685d550f1
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diff
changeset
|
2272 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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diff
changeset
|
2273 |
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
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1257
diff
changeset
|
2274 #ifndef PRODUCT |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2275 void print_statistics() { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2276 ResourceMark rm; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2277 int longest = 0; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2278 int empty = 0; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2279 int total = 0; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2280 int nonempty = 0; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2281 for (int index = 0; index < table_size(); index++) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2282 int count = 0; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2283 for (AdapterHandlerEntry* e = bucket(index); e != NULL; e = e->next()) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2284 count++; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2285 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2286 if (count != 0) nonempty++; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2287 if (count == 0) empty++; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2288 if (count > longest) longest = count; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2289 total += count; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2290 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2291 tty->print_cr("AdapterHandlerTable: empty %d longest %d total %d average %f", |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2292 empty, longest, total, total / (double)nonempty); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2293 tty->print_cr("AdapterHandlerTable: lookups %d buckets %d equals %d hits %d compact %d", |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2294 _lookups, _buckets, _equals, _hits, _compact); |
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
parents:
1257
diff
changeset
|
2295 } |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2296 #endif |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2297 }; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2298 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2299 |
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
parents:
1257
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2300 #ifndef PRODUCT |
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2301 |
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2302 int AdapterHandlerTable::_lookups; |
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2303 int AdapterHandlerTable::_buckets; |
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2304 int AdapterHandlerTable::_equals; |
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2305 int AdapterHandlerTable::_hits; |
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2306 int AdapterHandlerTable::_compact; |
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2307 |
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2308 #endif |
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2309 |
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2310 class AdapterHandlerTableIterator : public StackObj { |
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2311 private: |
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2312 AdapterHandlerTable* _table; |
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2313 int _index; |
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2314 AdapterHandlerEntry* _current; |
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2315 |
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2316 void scan() { |
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2317 while (_index < _table->table_size()) { |
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2318 AdapterHandlerEntry* a = _table->bucket(_index); |
1564 | 2319 _index++; |
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2320 if (a != NULL) { |
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2321 _current = a; |
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2322 return; |
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2323 } |
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2324 } |
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2325 } |
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2326 |
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2327 public: |
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2328 AdapterHandlerTableIterator(AdapterHandlerTable* table): _table(table), _index(0), _current(NULL) { |
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2329 scan(); |
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2330 } |
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2331 bool has_next() { |
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2332 return _current != NULL; |
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2333 } |
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2334 AdapterHandlerEntry* next() { |
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2335 if (_current != NULL) { |
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2336 AdapterHandlerEntry* result = _current; |
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2337 _current = _current->next(); |
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2338 if (_current == NULL) scan(); |
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2339 return result; |
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2340 } else { |
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2341 return NULL; |
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2342 } |
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2343 } |
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2344 }; |
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2345 |
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2346 |
0 | 2347 // --------------------------------------------------------------------------- |
2348 // Implementation of AdapterHandlerLibrary | |
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2349 AdapterHandlerTable* AdapterHandlerLibrary::_adapters = NULL; |
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2350 AdapterHandlerEntry* AdapterHandlerLibrary::_abstract_method_handler = NULL; |
0 | 2351 const int AdapterHandlerLibrary_size = 16*K; |
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2352 BufferBlob* AdapterHandlerLibrary::_buffer = NULL; |
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2353 |
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2354 BufferBlob* AdapterHandlerLibrary::buffer_blob() { |
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2355 // Should be called only when AdapterHandlerLibrary_lock is active. |
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2356 if (_buffer == NULL) // Initialize lazily |
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2357 _buffer = BufferBlob::create("adapters", AdapterHandlerLibrary_size); |
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2358 return _buffer; |
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2359 } |
0 | 2360 |
2361 void AdapterHandlerLibrary::initialize() { | |
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2362 if (_adapters != NULL) return; |
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2363 _adapters = new AdapterHandlerTable(); |
0 | 2364 |
2365 // Create a special handler for abstract methods. Abstract methods | |
2366 // are never compiled so an i2c entry is somewhat meaningless, but | |
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2367 // throw AbstractMethodError just in case. |
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2368 // Pass wrong_method_abstract for the c2i transitions to return |
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2369 // AbstractMethodError for invalid invocations. |
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2370 address wrong_method_abstract = SharedRuntime::get_handle_wrong_method_abstract_stub(); |
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2371 _abstract_method_handler = AdapterHandlerLibrary::new_entry(new AdapterFingerPrint(0, NULL), |
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2372 StubRoutines::throw_AbstractMethodError_entry(), |
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2373 wrong_method_abstract, wrong_method_abstract); |
0 | 2374 } |
2375 | |
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2376 AdapterHandlerEntry* AdapterHandlerLibrary::new_entry(AdapterFingerPrint* fingerprint, |
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2377 address i2c_entry, |
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2378 address c2i_entry, |
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2379 address c2i_unverified_entry) { |
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2380 return _adapters->new_entry(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry); |
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2381 } |
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2382 |
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2383 AdapterHandlerEntry* AdapterHandlerLibrary::get_adapter(methodHandle method) { |
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2384 // Use customized signature handler. Need to lock around updates to |
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2385 // the AdapterHandlerTable (it is not safe for concurrent readers |
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2386 // and a single writer: this could be fixed if it becomes a |
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2387 // problem). |
0 | 2388 |
2389 // Get the address of the ic_miss handlers before we grab the | |
2390 // AdapterHandlerLibrary_lock. This fixes bug 6236259 which | |
2391 // was caused by the initialization of the stubs happening | |
2392 // while we held the lock and then notifying jvmti while | |
2393 // holding it. This just forces the initialization to be a little | |
2394 // earlier. | |
2395 address ic_miss = SharedRuntime::get_ic_miss_stub(); | |
2396 assert(ic_miss != NULL, "must have handler"); | |
2397 | |
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2398 ResourceMark rm; |
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2399 |
1748 | 2400 NOT_PRODUCT(int insts_size); |
17611 | 2401 AdapterBlob* new_adapter = NULL; |
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2402 AdapterHandlerEntry* entry = NULL; |
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2403 AdapterFingerPrint* fingerprint = NULL; |
0 | 2404 { |
2405 MutexLocker mu(AdapterHandlerLibrary_lock); | |
2406 // make sure data structure is initialized | |
2407 initialize(); | |
2408 | |
2409 if (method->is_abstract()) { | |
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2410 return _abstract_method_handler; |
0 | 2411 } |
2412 | |
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2413 // Fill in the signature array, for the calling-convention call. |
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2414 int total_args_passed = method->size_of_parameters(); // All args on stack |
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2415 |
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2416 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed); |
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2417 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed); |
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2418 int i = 0; |
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2419 if (!method->is_static()) // Pass in receiver first |
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2420 sig_bt[i++] = T_OBJECT; |
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2421 for (SignatureStream ss(method->signature()); !ss.at_return_type(); ss.next()) { |
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2422 sig_bt[i++] = ss.type(); // Collect remaining bits of signature |
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2423 if (ss.type() == T_LONG || ss.type() == T_DOUBLE) |
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2424 sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
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2425 } |
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2426 assert(i == total_args_passed, ""); |
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2427 |
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2428 // Lookup method signature's fingerprint |
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2429 entry = _adapters->lookup(total_args_passed, sig_bt); |
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2430 |
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2431 #ifdef ASSERT |
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2432 AdapterHandlerEntry* shared_entry = NULL; |
17611 | 2433 // Start adapter sharing verification only after the VM is booted. |
2434 if (VerifyAdapterSharing && (entry != NULL)) { | |
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2435 shared_entry = entry; |
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2436 entry = NULL; |
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2437 } |
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2438 #endif |
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2439 |
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2440 if (entry != NULL) { |
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2441 return entry; |
0 | 2442 } |
2443 | |
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2444 // Get a description of the compiled java calling convention and the largest used (VMReg) stack slot usage |
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2445 int comp_args_on_stack = SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed, false); |
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2446 |
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2447 // Make a C heap allocated version of the fingerprint to store in the adapter |
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2448 fingerprint = new AdapterFingerPrint(total_args_passed, sig_bt); |
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2449 |
17611 | 2450 // StubRoutines::code2() is initialized after this function can be called. As a result, |
2451 // VerifyAdapterCalls and VerifyAdapterSharing can fail if we re-use code that generated | |
2452 // prior to StubRoutines::code2() being set. Checks refer to checks generated in an I2C | |
2453 // stub that ensure that an I2C stub is called from an interpreter frame. | |
2454 bool contains_all_checks = StubRoutines::code2() != NULL; | |
2455 | |
0 | 2456 // Create I2C & C2I handlers |
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2457 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
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2458 if (buf != NULL) { |
1748 | 2459 CodeBuffer buffer(buf); |
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2460 short buffer_locs[20]; |
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2461 buffer.insts()->initialize_shared_locs((relocInfo*)buffer_locs, |
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2462 sizeof(buffer_locs)/sizeof(relocInfo)); |
17611 | 2463 |
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2464 MacroAssembler _masm(&buffer); |
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2465 entry = SharedRuntime::generate_i2c2i_adapters(&_masm, |
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2466 total_args_passed, |
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2467 comp_args_on_stack, |
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2468 sig_bt, |
1187
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|
2469 regs, |
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|
2470 fingerprint); |
1207
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|
2471 #ifdef ASSERT |
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|
2472 if (VerifyAdapterSharing) { |
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|
2473 if (shared_entry != NULL) { |
17611 | 2474 assert(shared_entry->compare_code(buf->code_begin(), buffer.insts_size()), "code must match"); |
1207
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|
2475 // Release the one just created and return the original |
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|
2476 _adapters->free_entry(entry); |
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|
2477 return shared_entry; |
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|
2478 } else { |
17611 | 2479 entry->save_code(buf->code_begin(), buffer.insts_size()); |
1207
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|
2480 } |
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|
2481 } |
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|
2482 #endif |
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2483 |
17611 | 2484 new_adapter = AdapterBlob::create(&buffer); |
1748 | 2485 NOT_PRODUCT(insts_size = buffer.insts_size()); |
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2486 } |
17611 | 2487 if (new_adapter == NULL) { |
28 | 2488 // CodeCache is full, disable compilation |
2489 // Ought to log this but compile log is only per compile thread | |
2490 // and we're some non descript Java thread. | |
1202 | 2491 MutexUnlocker mu(AdapterHandlerLibrary_lock); |
2492 CompileBroker::handle_full_code_cache(); | |
1187
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2493 return NULL; // Out of CodeCache space |
28 | 2494 } |
17611 | 2495 entry->relocate(new_adapter->content_begin()); |
0 | 2496 #ifndef PRODUCT |
2497 // debugging suppport | |
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2498 if (PrintAdapterHandlers || PrintStubCode) { |
6796
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2499 ttyLocker ttyl; |
6266
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2500 entry->print_adapter_on(tty); |
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2501 tty->print_cr("i2c argument handler #%d for: %s %s (%d bytes generated)", |
1187
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2502 _adapters->number_of_entries(), (method->is_static() ? "static" : "receiver"), |
6266
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2503 method->signature()->as_C_string(), insts_size); |
0 | 2504 tty->print_cr("c2i argument handler starts at %p",entry->get_c2i_entry()); |
6266
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2505 if (Verbose || PrintStubCode) { |
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2506 address first_pc = entry->base_address(); |
6796
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2507 if (first_pc != NULL) { |
6266
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2508 Disassembler::decode(first_pc, first_pc + insts_size); |
6796
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|
2509 tty->cr(); |
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|
2510 } |
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|
2511 } |
0 | 2512 } |
2513 #endif | |
17611 | 2514 // Add the entry only if the entry contains all required checks (see sharedRuntime_xxx.cpp) |
2515 // The checks are inserted only if -XX:+VerifyAdapterCalls is specified. | |
2516 if (contains_all_checks || !VerifyAdapterCalls) { | |
2517 _adapters->add(entry); | |
2518 } | |
0 | 2519 } |
2520 // Outside of the lock | |
17611 | 2521 if (new_adapter != NULL) { |
0 | 2522 char blob_id[256]; |
2523 jio_snprintf(blob_id, | |
2524 sizeof(blob_id), | |
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2525 "%s(%s)@" PTR_FORMAT, |
17611 | 2526 new_adapter->name(), |
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|
2527 fingerprint->as_string(), |
17611 | 2528 new_adapter->content_begin()); |
2529 Forte::register_stub(blob_id, new_adapter->content_begin(),new_adapter->content_end()); | |
0 | 2530 |
2531 if (JvmtiExport::should_post_dynamic_code_generated()) { | |
17611 | 2532 JvmtiExport::post_dynamic_code_generated(blob_id, new_adapter->content_begin(), new_adapter->content_end()); |
0 | 2533 } |
2534 } | |
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|
2535 return entry; |
0 | 2536 } |
2537 | |
6266
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2538 address AdapterHandlerEntry::base_address() { |
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|
2539 address base = _i2c_entry; |
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2540 if (base == NULL) base = _c2i_entry; |
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2541 assert(base <= _c2i_entry || _c2i_entry == NULL, ""); |
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2542 assert(base <= _c2i_unverified_entry || _c2i_unverified_entry == NULL, ""); |
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|
2543 return base; |
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|
2544 } |
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|
2545 |
0 | 2546 void AdapterHandlerEntry::relocate(address new_base) { |
6266
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|
2547 address old_base = base_address(); |
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|
2548 assert(old_base != NULL, ""); |
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|
2549 ptrdiff_t delta = new_base - old_base; |
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2550 if (_i2c_entry != NULL) |
0 | 2551 _i2c_entry += delta; |
6266
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|
2552 if (_c2i_entry != NULL) |
0 | 2553 _c2i_entry += delta; |
6266
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|
2554 if (_c2i_unverified_entry != NULL) |
0 | 2555 _c2i_unverified_entry += delta; |
6266
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|
2556 assert(base_address() == new_base, ""); |
0 | 2557 } |
2558 | |
1207
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|
2559 |
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|
2560 void AdapterHandlerEntry::deallocate() { |
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|
2561 delete _fingerprint; |
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|
2562 #ifdef ASSERT |
6197 | 2563 if (_saved_code) FREE_C_HEAP_ARRAY(unsigned char, _saved_code, mtCode); |
1207
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|
2564 #endif |
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|
2565 } |
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|
2566 |
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|
2567 |
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|
2568 #ifdef ASSERT |
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|
2569 // Capture the code before relocation so that it can be compared |
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|
2570 // against other versions. If the code is captured after relocation |
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|
2571 // then relative instructions won't be equivalent. |
17611 | 2572 void AdapterHandlerEntry::save_code(unsigned char* buffer, int length) { |
6197 | 2573 _saved_code = NEW_C_HEAP_ARRAY(unsigned char, length, mtCode); |
17611 | 2574 _saved_code_length = length; |
1207
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|
2575 memcpy(_saved_code, buffer, length); |
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|
2576 } |
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|
2577 |
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|
2578 |
17611 | 2579 bool AdapterHandlerEntry::compare_code(unsigned char* buffer, int length) { |
2580 if (length != _saved_code_length) { | |
1207
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|
2581 return false; |
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|
2582 } |
17611 | 2583 |
2584 return (memcmp(buffer, _saved_code, length) == 0) ? true : false; | |
1207
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|
2585 } |
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|
2586 #endif |
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|
2587 |
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|
2588 |
17625 | 2589 /** |
2590 * Create a native wrapper for this native method. The wrapper converts the | |
2591 * Java-compiled calling convention to the native convention, handles | |
2592 * arguments, and transitions to native. On return from the native we transition | |
2593 * back to java blocking if a safepoint is in progress. | |
2594 */ | |
2595 void AdapterHandlerLibrary::create_native_wrapper(methodHandle method) { | |
0 | 2596 ResourceMark rm; |
2597 nmethod* nm = NULL; | |
2598 | |
6266
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2599 assert(method->is_native(), "must be native"); |
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2600 assert(method->is_method_handle_intrinsic() || |
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|
2601 method->has_native_function(), "must have something valid to call!"); |
0 | 2602 |
2603 { | |
17625 | 2604 // Perform the work while holding the lock, but perform any printing outside the lock |
0 | 2605 MutexLocker mu(AdapterHandlerLibrary_lock); |
2606 // See if somebody beat us to it | |
2607 nm = method->code(); | |
17625 | 2608 if (nm != NULL) { |
2609 return; | |
0 | 2610 } |
2611 | |
17625 | 2612 const int compile_id = CompileBroker::assign_compile_id(method, CompileBroker::standard_entry_bci); |
2613 assert(compile_id > 0, "Must generate native wrapper"); | |
2614 | |
2615 | |
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|
2616 ResourceMark rm; |
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2617 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
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2618 if (buf != NULL) { |
1748 | 2619 CodeBuffer buffer(buf); |
742
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2620 double locs_buf[20]; |
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2621 buffer.insts()->initialize_shared_locs((relocInfo*)locs_buf, sizeof(locs_buf) / sizeof(relocInfo)); |
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|
2622 MacroAssembler _masm(&buffer); |
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|
2623 |
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2624 // Fill in the signature array, for the calling-convention call. |
6790
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2625 const int total_args_passed = method->size_of_parameters(); |
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2626 |
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2627 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed); |
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2628 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed); |
742
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2629 int i=0; |
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2630 if( !method->is_static() ) // Pass in receiver first |
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2631 sig_bt[i++] = T_OBJECT; |
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|
2632 SignatureStream ss(method->signature()); |
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2633 for( ; !ss.at_return_type(); ss.next()) { |
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2634 sig_bt[i++] = ss.type(); // Collect remaining bits of signature |
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2635 if( ss.type() == T_LONG || ss.type() == T_DOUBLE ) |
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2636 sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
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2637 } |
6790
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|
2638 assert(i == total_args_passed, ""); |
742
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2639 BasicType ret_type = ss.type(); |
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2640 |
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|
2641 // Now get the compiled-Java layout as input (or output) arguments. |
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2642 // NOTE: Stubs for compiled entry points of method handle intrinsics |
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2643 // are just trampolines so the argument registers must be outgoing ones. |
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2644 const bool is_outgoing = method->is_method_handle_intrinsic(); |
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2645 int comp_args_on_stack = SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed, is_outgoing); |
742
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2646 |
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|
2647 // Generate the compiled-to-native wrapper code |
17625 | 2648 nm = SharedRuntime::generate_native_wrapper(&_masm, method, compile_id, sig_bt, regs, ret_type); |
2649 | |
2650 if (nm != NULL) { | |
2651 method->set_code(method, nm); | |
2652 } | |
0 | 2653 } |
17625 | 2654 } // Unlock AdapterHandlerLibrary_lock |
2655 | |
1728
a62d332029cf
6976372: # assert(_owner == Thread::current()) failed: invariant
never
parents:
1681
diff
changeset
|
2656 |
0 | 2657 // Install the generated code. |
2658 if (nm != NULL) { | |
2405
3d58a4983660
7022998: JSR 292 recursive method handle calls inline themselves infinitely
twisti
parents:
2321
diff
changeset
|
2659 if (PrintCompilation) { |
3d58a4983660
7022998: JSR 292 recursive method handle calls inline themselves infinitely
twisti
parents:
2321
diff
changeset
|
2660 ttyLocker ttyl; |
3d58a4983660
7022998: JSR 292 recursive method handle calls inline themselves infinitely
twisti
parents:
2321
diff
changeset
|
2661 CompileTask::print_compilation(tty, nm, method->is_static() ? "(static)" : ""); |
3d58a4983660
7022998: JSR 292 recursive method handle calls inline themselves infinitely
twisti
parents:
2321
diff
changeset
|
2662 } |
0 | 2663 nm->post_compiled_method_load_event(); |
2664 } else { | |
2665 // CodeCache is full, disable compilation | |
1202 | 2666 CompileBroker::handle_full_code_cache(); |
0 | 2667 } |
2668 } | |
2669 | |
4873
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2670 JRT_ENTRY_NO_ASYNC(void, SharedRuntime::block_for_jni_critical(JavaThread* thread)) |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2671 assert(thread == JavaThread::current(), "must be"); |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2672 // The code is about to enter a JNI lazy critical native method and |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2673 // _needs_gc is true, so if this thread is already in a critical |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2674 // section then just return, otherwise this thread should block |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2675 // until needs_gc has been cleared. |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2676 if (thread->in_critical()) { |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2677 return; |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2678 } |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2679 // Lock and unlock a critical section to give the system a chance to block |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2680 GC_locker::lock_critical(thread); |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2681 GC_locker::unlock_critical(thread); |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2682 JRT_END |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2683 |
116
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2684 #ifdef HAVE_DTRACE_H |
17915
e0a77b91da68
8040085: dtrace/jsdt tests crash on solaris. found an unadvertised bad scavengable oop in the code cache
anoll
parents:
17884
diff
changeset
|
2685 /** |
e0a77b91da68
8040085: dtrace/jsdt tests crash on solaris. found an unadvertised bad scavengable oop in the code cache
anoll
parents:
17884
diff
changeset
|
2686 * Create a dtrace nmethod for this method. The wrapper converts the |
e0a77b91da68
8040085: dtrace/jsdt tests crash on solaris. found an unadvertised bad scavengable oop in the code cache
anoll
parents:
17884
diff
changeset
|
2687 * Java-compiled calling convention to the native convention, makes a dummy call |
e0a77b91da68
8040085: dtrace/jsdt tests crash on solaris. found an unadvertised bad scavengable oop in the code cache
anoll
parents:
17884
diff
changeset
|
2688 * (actually nops for the size of the call instruction, which become a trap if |
e0a77b91da68
8040085: dtrace/jsdt tests crash on solaris. found an unadvertised bad scavengable oop in the code cache
anoll
parents:
17884
diff
changeset
|
2689 * probe is enabled), and finally returns to the caller. Since this all looks like a |
e0a77b91da68
8040085: dtrace/jsdt tests crash on solaris. found an unadvertised bad scavengable oop in the code cache
anoll
parents:
17884
diff
changeset
|
2690 * leaf, no thread transition is needed. |
e0a77b91da68
8040085: dtrace/jsdt tests crash on solaris. found an unadvertised bad scavengable oop in the code cache
anoll
parents:
17884
diff
changeset
|
2691 */ |
116
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2692 nmethod *AdapterHandlerLibrary::create_dtrace_nmethod(methodHandle method) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2693 ResourceMark rm; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2694 nmethod* nm = NULL; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2695 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2696 if (PrintCompilation) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2697 ttyLocker ttyl; |
17915
e0a77b91da68
8040085: dtrace/jsdt tests crash on solaris. found an unadvertised bad scavengable oop in the code cache
anoll
parents:
17884
diff
changeset
|
2698 tty->print("--- n "); |
116
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2699 method->print_short_name(tty); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2700 if (method->is_static()) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2701 tty->print(" (static)"); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2702 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2703 tty->cr(); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2704 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2705 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2706 { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2707 // perform the work while holding the lock, but perform any printing |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2708 // outside the lock |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2709 MutexLocker mu(AdapterHandlerLibrary_lock); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2710 // See if somebody beat us to it |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2711 nm = method->code(); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2712 if (nm) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2713 return nm; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2714 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2715 |
742
45463a04ca27
6834177: Running jsynprog on Solaris Nevada can cause JVM crash
kvn
parents:
710
diff
changeset
|
2716 ResourceMark rm; |
45463a04ca27
6834177: Running jsynprog on Solaris Nevada can cause JVM crash
kvn
parents:
710
diff
changeset
|
2717 |
45463a04ca27
6834177: Running jsynprog on Solaris Nevada can cause JVM crash
kvn
parents:
710
diff
changeset
|
2718 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
45463a04ca27
6834177: Running jsynprog on Solaris Nevada can cause JVM crash
kvn
parents:
710
diff
changeset
|
2719 if (buf != NULL) { |
1748 | 2720 CodeBuffer buffer(buf); |
742
45463a04ca27
6834177: Running jsynprog on Solaris Nevada can cause JVM crash
kvn
parents:
710
diff
changeset
|
2721 // Need a few relocation entries |
45463a04ca27
6834177: Running jsynprog on Solaris Nevada can cause JVM crash
kvn
parents:
710
diff
changeset
|
2722 double locs_buf[20]; |
45463a04ca27
6834177: Running jsynprog on Solaris Nevada can cause JVM crash
kvn
parents:
710
diff
changeset
|
2723 buffer.insts()->initialize_shared_locs( |
116
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2724 (relocInfo*)locs_buf, sizeof(locs_buf) / sizeof(relocInfo)); |
742
45463a04ca27
6834177: Running jsynprog on Solaris Nevada can cause JVM crash
kvn
parents:
710
diff
changeset
|
2725 MacroAssembler _masm(&buffer); |
116
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2726 |
742
45463a04ca27
6834177: Running jsynprog on Solaris Nevada can cause JVM crash
kvn
parents:
710
diff
changeset
|
2727 // Generate the compiled-to-native wrapper code |
45463a04ca27
6834177: Running jsynprog on Solaris Nevada can cause JVM crash
kvn
parents:
710
diff
changeset
|
2728 nm = SharedRuntime::generate_dtrace_nmethod(&_masm, method); |
45463a04ca27
6834177: Running jsynprog on Solaris Nevada can cause JVM crash
kvn
parents:
710
diff
changeset
|
2729 } |
116
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2730 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2731 return nm; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2732 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2733 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2734 // the dtrace method needs to convert java lang string to utf8 string. |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2735 void SharedRuntime::get_utf(oopDesc* src, address dst) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2736 typeArrayOop jlsValue = java_lang_String::value(src); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2737 int jlsOffset = java_lang_String::offset(src); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2738 int jlsLen = java_lang_String::length(src); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2739 jchar* jlsPos = (jlsLen == 0) ? NULL : |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2740 jlsValue->char_at_addr(jlsOffset); |
6831
d8ce2825b193
8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents:
6796
diff
changeset
|
2741 assert(TypeArrayKlass::cast(jlsValue->klass())->element_type() == T_CHAR, "compressed string"); |
116
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2742 (void) UNICODE::as_utf8(jlsPos, jlsLen, (char *)dst, max_dtrace_string_size); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2743 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2744 #endif // ndef HAVE_DTRACE_H |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
62
diff
changeset
|
2745 |
14418
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2746 int SharedRuntime::convert_ints_to_longints_argcnt(int in_args_count, BasicType* in_sig_bt) { |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2747 int argcnt = in_args_count; |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2748 if (CCallingConventionRequiresIntsAsLongs) { |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2749 for (int in = 0; in < in_args_count; in++) { |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2750 BasicType bt = in_sig_bt[in]; |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2751 switch (bt) { |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2752 case T_BOOLEAN: |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2753 case T_CHAR: |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2754 case T_BYTE: |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2755 case T_SHORT: |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2756 case T_INT: |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2757 argcnt++; |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2758 break; |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2759 default: |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2760 break; |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2761 } |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2762 } |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2763 } else { |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2764 assert(0, "This should not be needed on this platform"); |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2765 } |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2766 |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2767 return argcnt; |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2768 } |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2769 |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2770 void SharedRuntime::convert_ints_to_longints(int i2l_argcnt, int& in_args_count, |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2771 BasicType*& in_sig_bt, VMRegPair*& in_regs) { |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2772 if (CCallingConventionRequiresIntsAsLongs) { |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2773 VMRegPair *new_in_regs = NEW_RESOURCE_ARRAY(VMRegPair, i2l_argcnt); |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2774 BasicType *new_in_sig_bt = NEW_RESOURCE_ARRAY(BasicType, i2l_argcnt); |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2775 |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2776 int argcnt = 0; |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2777 for (int in = 0; in < in_args_count; in++, argcnt++) { |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2778 BasicType bt = in_sig_bt[in]; |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2779 VMRegPair reg = in_regs[in]; |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2780 switch (bt) { |
cfd05ec74089
8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
goetz
parents:
14396
diff
changeset
|
2781 case T_BOOLEAN: |
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2782 case T_CHAR: |
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2783 case T_BYTE: |
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8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
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2784 case T_SHORT: |
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2785 case T_INT: |
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2786 // Convert (bt) to (T_LONG,bt). |
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2787 new_in_sig_bt[argcnt ] = T_LONG; |
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2788 new_in_sig_bt[argcnt+1] = bt; |
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2789 assert(reg.first()->is_valid() && !reg.second()->is_valid(), ""); |
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2790 new_in_regs[argcnt ].set2(reg.first()); |
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2791 new_in_regs[argcnt+1].set_bad(); |
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|
2792 argcnt++; |
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diff
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|
2793 break; |
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diff
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|
2794 default: |
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8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
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|
2795 // No conversion needed. |
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2796 new_in_sig_bt[argcnt] = bt; |
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2797 new_in_regs[argcnt] = reg; |
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|
2798 break; |
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diff
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|
2799 } |
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|
2800 } |
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2801 assert(argcnt == i2l_argcnt, "must match"); |
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|
2802 |
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|
2803 in_regs = new_in_regs; |
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2804 in_sig_bt = new_in_sig_bt; |
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2805 in_args_count = i2l_argcnt; |
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|
2806 } else { |
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|
2807 assert(0, "This should not be needed on this platform"); |
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|
2808 } |
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|
2809 } |
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|
2810 |
0 | 2811 // ------------------------------------------------------------------------- |
2812 // Java-Java calling convention | |
2813 // (what you use when Java calls Java) | |
2814 | |
2815 //------------------------------name_for_receiver---------------------------------- | |
2816 // For a given signature, return the VMReg for parameter 0. | |
2817 VMReg SharedRuntime::name_for_receiver() { | |
2818 VMRegPair regs; | |
2819 BasicType sig_bt = T_OBJECT; | |
2820 (void) java_calling_convention(&sig_bt, ®s, 1, true); | |
2821 // Return argument 0 register. In the LP64 build pointers | |
2822 // take 2 registers, but the VM wants only the 'main' name. | |
2823 return regs.first(); | |
2824 } | |
2825 | |
10390 | 2826 VMRegPair *SharedRuntime::find_callee_arguments(Symbol* sig, bool has_receiver, bool has_appendix, int* arg_size) { |
0 | 2827 // This method is returning a data structure allocating as a |
2828 // ResourceObject, so do not put any ResourceMarks in here. | |
2829 char *s = sig->as_C_string(); | |
2830 int len = (int)strlen(s); | |
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2831 s++; len--; // Skip opening paren |
0 | 2832 char *t = s+len; |
2833 while( *(--t) != ')' ) ; // Find close paren | |
2834 | |
2835 BasicType *sig_bt = NEW_RESOURCE_ARRAY( BasicType, 256 ); | |
2836 VMRegPair *regs = NEW_RESOURCE_ARRAY( VMRegPair, 256 ); | |
2837 int cnt = 0; | |
1138
dd57230ba8fe
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2838 if (has_receiver) { |
0 | 2839 sig_bt[cnt++] = T_OBJECT; // Receiver is argument 0; not in signature |
2840 } | |
2841 | |
2842 while( s < t ) { | |
2843 switch( *s++ ) { // Switch on signature character | |
2844 case 'B': sig_bt[cnt++] = T_BYTE; break; | |
2845 case 'C': sig_bt[cnt++] = T_CHAR; break; | |
2846 case 'D': sig_bt[cnt++] = T_DOUBLE; sig_bt[cnt++] = T_VOID; break; | |
2847 case 'F': sig_bt[cnt++] = T_FLOAT; break; | |
2848 case 'I': sig_bt[cnt++] = T_INT; break; | |
2849 case 'J': sig_bt[cnt++] = T_LONG; sig_bt[cnt++] = T_VOID; break; | |
2850 case 'S': sig_bt[cnt++] = T_SHORT; break; | |
2851 case 'Z': sig_bt[cnt++] = T_BOOLEAN; break; | |
2852 case 'V': sig_bt[cnt++] = T_VOID; break; | |
2853 case 'L': // Oop | |
2854 while( *s++ != ';' ) ; // Skip signature | |
2855 sig_bt[cnt++] = T_OBJECT; | |
2856 break; | |
2857 case '[': { // Array | |
2858 do { // Skip optional size | |
2859 while( *s >= '0' && *s <= '9' ) s++; | |
2860 } while( *s++ == '[' ); // Nested arrays? | |
2861 // Skip element type | |
2862 if( s[-1] == 'L' ) | |
2863 while( *s++ != ';' ) ; // Skip signature | |
2864 sig_bt[cnt++] = T_ARRAY; | |
2865 break; | |
2866 } | |
2867 default : ShouldNotReachHere(); | |
2868 } | |
2869 } | |
10390 | 2870 |
2871 if (has_appendix) { | |
2872 sig_bt[cnt++] = T_OBJECT; | |
2873 } | |
2874 | |
0 | 2875 assert( cnt < 256, "grow table size" ); |
2876 | |
2877 int comp_args_on_stack; | |
2878 comp_args_on_stack = java_calling_convention(sig_bt, regs, cnt, true); | |
2879 | |
2880 // the calling convention doesn't count out_preserve_stack_slots so | |
2881 // we must add that in to get "true" stack offsets. | |
2882 | |
2883 if (comp_args_on_stack) { | |
2884 for (int i = 0; i < cnt; i++) { | |
2885 VMReg reg1 = regs[i].first(); | |
2886 if( reg1->is_stack()) { | |
2887 // Yuck | |
2888 reg1 = reg1->bias(out_preserve_stack_slots()); | |
2889 } | |
2890 VMReg reg2 = regs[i].second(); | |
2891 if( reg2->is_stack()) { | |
2892 // Yuck | |
2893 reg2 = reg2->bias(out_preserve_stack_slots()); | |
2894 } | |
2895 regs[i].set_pair(reg2, reg1); | |
2896 } | |
2897 } | |
2898 | |
2899 // results | |
2900 *arg_size = cnt; | |
2901 return regs; | |
2902 } | |
2903 | |
2904 // OSR Migration Code | |
2905 // | |
2906 // This code is used convert interpreter frames into compiled frames. It is | |
2907 // called from very start of a compiled OSR nmethod. A temp array is | |
2908 // allocated to hold the interesting bits of the interpreter frame. All | |
2909 // active locks are inflated to allow them to move. The displaced headers and | |
2910 // active interpeter locals are copied into the temp buffer. Then we return | |
2911 // back to the compiled code. The compiled code then pops the current | |
2912 // interpreter frame off the stack and pushes a new compiled frame. Then it | |
2913 // copies the interpreter locals and displaced headers where it wants. | |
2914 // Finally it calls back to free the temp buffer. | |
2915 // | |
2916 // All of this is done NOT at any Safepoint, nor is any safepoint or GC allowed. | |
2917 | |
2918 JRT_LEAF(intptr_t*, SharedRuntime::OSR_migration_begin( JavaThread *thread) ) | |
2919 | |
2920 // | |
2921 // This code is dependent on the memory layout of the interpreter local | |
2922 // array and the monitors. On all of our platforms the layout is identical | |
2923 // so this code is shared. If some platform lays the their arrays out | |
2924 // differently then this code could move to platform specific code or | |
2925 // the code here could be modified to copy items one at a time using | |
2926 // frame accessor methods and be platform independent. | |
2927 | |
2928 frame fr = thread->last_frame(); | |
2929 assert( fr.is_interpreted_frame(), "" ); | |
2930 assert( fr.interpreter_frame_expression_stack_size()==0, "only handle empty stacks" ); | |
2931 | |
2932 // Figure out how many monitors are active. | |
2933 int active_monitor_count = 0; | |
2934 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); | |
2935 kptr < fr.interpreter_frame_monitor_begin(); | |
2936 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { | |
2937 if( kptr->obj() != NULL ) active_monitor_count++; | |
2938 } | |
2939 | |
2940 // QQQ we could place number of active monitors in the array so that compiled code | |
2941 // could double check it. | |
2942 | |
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2943 Method* moop = fr.interpreter_frame_method(); |
0 | 2944 int max_locals = moop->max_locals(); |
2945 // Allocate temp buffer, 1 word per local & 2 per active monitor | |
2946 int buf_size_words = max_locals + active_monitor_count*2; | |
6197 | 2947 intptr_t *buf = NEW_C_HEAP_ARRAY(intptr_t,buf_size_words, mtCode); |
0 | 2948 |
2949 // Copy the locals. Order is preserved so that loading of longs works. | |
2950 // Since there's no GC I can copy the oops blindly. | |
2951 assert( sizeof(HeapWord)==sizeof(intptr_t), "fix this code"); | |
1506 | 2952 Copy::disjoint_words((HeapWord*)fr.interpreter_frame_local_at(max_locals-1), |
0 | 2953 (HeapWord*)&buf[0], |
2954 max_locals); | |
2955 | |
2956 // Inflate locks. Copy the displaced headers. Be careful, there can be holes. | |
2957 int i = max_locals; | |
2958 for( BasicObjectLock *kptr2 = fr.interpreter_frame_monitor_end(); | |
2959 kptr2 < fr.interpreter_frame_monitor_begin(); | |
2960 kptr2 = fr.next_monitor_in_interpreter_frame(kptr2) ) { | |
2961 if( kptr2->obj() != NULL) { // Avoid 'holes' in the monitor array | |
2962 BasicLock *lock = kptr2->lock(); | |
2963 // Inflate so the displaced header becomes position-independent | |
2964 if (lock->displaced_header()->is_unlocked()) | |
2965 ObjectSynchronizer::inflate_helper(kptr2->obj()); | |
2966 // Now the displaced header is free to move | |
2967 buf[i++] = (intptr_t)lock->displaced_header(); | |
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2968 buf[i++] = cast_from_oop<intptr_t>(kptr2->obj()); |
0 | 2969 } |
2970 } | |
2971 assert( i - max_locals == active_monitor_count*2, "found the expected number of monitors" ); | |
2972 | |
2973 return buf; | |
2974 JRT_END | |
2975 | |
2976 JRT_LEAF(void, SharedRuntime::OSR_migration_end( intptr_t* buf) ) | |
6197 | 2977 FREE_C_HEAP_ARRAY(intptr_t,buf, mtCode); |
0 | 2978 JRT_END |
2979 | |
2980 bool AdapterHandlerLibrary::contains(CodeBlob* b) { | |
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2981 AdapterHandlerTableIterator iter(_adapters); |
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|
2982 while (iter.has_next()) { |
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2983 AdapterHandlerEntry* a = iter.next(); |
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|
2984 if ( b == CodeCache::find_blob(a->get_i2c_entry()) ) return true; |
0 | 2985 } |
2986 return false; | |
2987 } | |
2988 | |
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2989 void AdapterHandlerLibrary::print_handler_on(outputStream* st, CodeBlob* b) { |
1187
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2990 AdapterHandlerTableIterator iter(_adapters); |
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2991 while (iter.has_next()) { |
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2992 AdapterHandlerEntry* a = iter.next(); |
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2993 if (b == CodeCache::find_blob(a->get_i2c_entry())) { |
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2994 st->print("Adapter for signature: "); |
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|
2995 a->print_adapter_on(tty); |
0 | 2996 return; |
2997 } | |
2998 } | |
2999 assert(false, "Should have found handler"); | |
3000 } | |
1187
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3001 |
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3002 void AdapterHandlerEntry::print_adapter_on(outputStream* st) const { |
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3003 st->print_cr("AHE@" INTPTR_FORMAT ": %s i2c: " INTPTR_FORMAT " c2i: " INTPTR_FORMAT " c2iUV: " INTPTR_FORMAT, |
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3004 (intptr_t) this, fingerprint()->as_string(), |
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|
3005 get_i2c_entry(), get_c2i_entry(), get_c2i_unverified_entry()); |
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|
3006 |
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diff
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|
3007 } |
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|
3008 |
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|
3009 #ifndef PRODUCT |
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|
3010 |
1187
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|
3011 void AdapterHandlerLibrary::print_statistics() { |
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|
3012 _adapters->print_statistics(); |
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|
3013 } |
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|
3014 |
0 | 3015 #endif /* PRODUCT */ |