Mercurial > hg > truffle
annotate src/share/vm/runtime/sharedRuntime.cpp @ 3456:782e2bb60c41
7052494: Eclipse test fails on JDK 7 b142
Summary: Keep 'ne' test in Counted loop when we can't guarantee during compilation that init < limit.
Reviewed-by: never
author | kvn |
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date | Mon, 20 Jun 2011 16:45:35 -0700 |
parents | 38fa55e5e792 |
children | be4ca325525a 0f34fdee809e |
rev | line source |
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0 | 1 /* |
2142 | 2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #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" | |
34 #include "interpreter/interpreter.hpp" | |
35 #include "interpreter/interpreterRuntime.hpp" | |
36 #include "memory/gcLocker.inline.hpp" | |
37 #include "memory/universe.inline.hpp" | |
38 #include "oops/oop.inline.hpp" | |
39 #include "prims/forte.hpp" | |
40 #include "prims/jvmtiExport.hpp" | |
41 #include "prims/jvmtiRedefineClassesTrace.hpp" | |
42 #include "prims/methodHandles.hpp" | |
43 #include "prims/nativeLookup.hpp" | |
44 #include "runtime/arguments.hpp" | |
45 #include "runtime/biasedLocking.hpp" | |
46 #include "runtime/handles.inline.hpp" | |
47 #include "runtime/init.hpp" | |
48 #include "runtime/interfaceSupport.hpp" | |
49 #include "runtime/javaCalls.hpp" | |
50 #include "runtime/sharedRuntime.hpp" | |
51 #include "runtime/stubRoutines.hpp" | |
52 #include "runtime/vframe.hpp" | |
53 #include "runtime/vframeArray.hpp" | |
54 #include "utilities/copy.hpp" | |
55 #include "utilities/dtrace.hpp" | |
56 #include "utilities/events.hpp" | |
57 #include "utilities/hashtable.inline.hpp" | |
58 #include "utilities/xmlstream.hpp" | |
59 #ifdef TARGET_ARCH_x86 | |
60 # include "nativeInst_x86.hpp" | |
61 # include "vmreg_x86.inline.hpp" | |
62 #endif | |
63 #ifdef TARGET_ARCH_sparc | |
64 # include "nativeInst_sparc.hpp" | |
65 # include "vmreg_sparc.inline.hpp" | |
66 #endif | |
67 #ifdef TARGET_ARCH_zero | |
68 # include "nativeInst_zero.hpp" | |
69 # include "vmreg_zero.inline.hpp" | |
70 #endif | |
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71 #ifdef TARGET_ARCH_arm |
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72 # include "nativeInst_arm.hpp" |
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73 # include "vmreg_arm.inline.hpp" |
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74 #endif |
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75 #ifdef TARGET_ARCH_ppc |
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76 # include "nativeInst_ppc.hpp" |
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77 # include "vmreg_ppc.inline.hpp" |
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78 #endif |
1972 | 79 #ifdef COMPILER1 |
80 #include "c1/c1_Runtime1.hpp" | |
81 #endif | |
82 | |
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83 // Shared stub locations |
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84 RuntimeStub* SharedRuntime::_wrong_method_blob; |
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85 RuntimeStub* SharedRuntime::_ic_miss_blob; |
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86 RuntimeStub* SharedRuntime::_resolve_opt_virtual_call_blob; |
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87 RuntimeStub* SharedRuntime::_resolve_virtual_call_blob; |
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88 RuntimeStub* SharedRuntime::_resolve_static_call_blob; |
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89 |
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90 DeoptimizationBlob* SharedRuntime::_deopt_blob; |
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91 RicochetBlob* SharedRuntime::_ricochet_blob; |
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92 |
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93 SafepointBlob* SharedRuntime::_polling_page_safepoint_handler_blob; |
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94 SafepointBlob* SharedRuntime::_polling_page_return_handler_blob; |
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95 |
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96 #ifdef COMPILER2 |
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97 UncommonTrapBlob* SharedRuntime::_uncommon_trap_blob; |
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98 #endif // COMPILER2 |
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99 |
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100 |
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101 //----------------------------generate_stubs----------------------------------- |
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102 void SharedRuntime::generate_stubs() { |
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103 _wrong_method_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::handle_wrong_method), "wrong_method_stub"); |
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104 _ic_miss_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::handle_wrong_method_ic_miss), "ic_miss_stub"); |
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105 _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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106 _resolve_virtual_call_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::resolve_virtual_call_C), "resolve_virtual_call"); |
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107 _resolve_static_call_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::resolve_static_call_C), "resolve_static_call"); |
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108 |
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109 _polling_page_safepoint_handler_blob = generate_handler_blob(CAST_FROM_FN_PTR(address, SafepointSynchronize::handle_polling_page_exception), false); |
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110 _polling_page_return_handler_blob = generate_handler_blob(CAST_FROM_FN_PTR(address, SafepointSynchronize::handle_polling_page_exception), true); |
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111 |
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112 generate_ricochet_blob(); |
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113 generate_deopt_blob(); |
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114 |
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115 #ifdef COMPILER2 |
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116 generate_uncommon_trap_blob(); |
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117 #endif // COMPILER2 |
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118 } |
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119 |
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120 //----------------------------generate_ricochet_blob--------------------------- |
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121 void SharedRuntime::generate_ricochet_blob() { |
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122 if (!EnableInvokeDynamic) return; // leave it as a null |
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123 |
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124 #ifndef TARGET_ARCH_NYI_6939861 |
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125 // allocate space for the code |
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126 ResourceMark rm; |
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127 // setup code generation tools |
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128 CodeBuffer buffer("ricochet_blob", 256 LP64_ONLY(+ 256), 256); // XXX x86 LP64L: 512, 512 |
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129 MacroAssembler* masm = new MacroAssembler(&buffer); |
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130 |
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131 int bounce_offset = -1, exception_offset = -1, frame_size_in_words = -1; |
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132 MethodHandles::RicochetFrame::generate_ricochet_blob(masm, &bounce_offset, &exception_offset, &frame_size_in_words); |
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133 |
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134 // ------------- |
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135 // make sure all code is generated |
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136 masm->flush(); |
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137 |
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138 // failed to generate? |
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139 if (bounce_offset < 0 || exception_offset < 0 || frame_size_in_words < 0) { |
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140 assert(false, "bad ricochet blob"); |
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141 return; |
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142 } |
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143 |
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144 _ricochet_blob = RicochetBlob::create(&buffer, bounce_offset, exception_offset, frame_size_in_words); |
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145 #endif |
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146 } |
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147 |
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148 |
0 | 149 #include <math.h> |
150 | |
151 HS_DTRACE_PROBE_DECL4(hotspot, object__alloc, Thread*, char*, int, size_t); | |
152 HS_DTRACE_PROBE_DECL7(hotspot, method__entry, int, | |
153 char*, int, char*, int, char*, int); | |
154 HS_DTRACE_PROBE_DECL7(hotspot, method__return, int, | |
155 char*, int, char*, int, char*, int); | |
156 | |
157 // Implementation of SharedRuntime | |
158 | |
159 #ifndef PRODUCT | |
160 // For statistics | |
161 int SharedRuntime::_ic_miss_ctr = 0; | |
162 int SharedRuntime::_wrong_method_ctr = 0; | |
163 int SharedRuntime::_resolve_static_ctr = 0; | |
164 int SharedRuntime::_resolve_virtual_ctr = 0; | |
165 int SharedRuntime::_resolve_opt_virtual_ctr = 0; | |
166 int SharedRuntime::_implicit_null_throws = 0; | |
167 int SharedRuntime::_implicit_div0_throws = 0; | |
168 int SharedRuntime::_throw_null_ctr = 0; | |
169 | |
170 int SharedRuntime::_nof_normal_calls = 0; | |
171 int SharedRuntime::_nof_optimized_calls = 0; | |
172 int SharedRuntime::_nof_inlined_calls = 0; | |
173 int SharedRuntime::_nof_megamorphic_calls = 0; | |
174 int SharedRuntime::_nof_static_calls = 0; | |
175 int SharedRuntime::_nof_inlined_static_calls = 0; | |
176 int SharedRuntime::_nof_interface_calls = 0; | |
177 int SharedRuntime::_nof_optimized_interface_calls = 0; | |
178 int SharedRuntime::_nof_inlined_interface_calls = 0; | |
179 int SharedRuntime::_nof_megamorphic_interface_calls = 0; | |
180 int SharedRuntime::_nof_removable_exceptions = 0; | |
181 | |
182 int SharedRuntime::_new_instance_ctr=0; | |
183 int SharedRuntime::_new_array_ctr=0; | |
184 int SharedRuntime::_multi1_ctr=0; | |
185 int SharedRuntime::_multi2_ctr=0; | |
186 int SharedRuntime::_multi3_ctr=0; | |
187 int SharedRuntime::_multi4_ctr=0; | |
188 int SharedRuntime::_multi5_ctr=0; | |
189 int SharedRuntime::_mon_enter_stub_ctr=0; | |
190 int SharedRuntime::_mon_exit_stub_ctr=0; | |
191 int SharedRuntime::_mon_enter_ctr=0; | |
192 int SharedRuntime::_mon_exit_ctr=0; | |
193 int SharedRuntime::_partial_subtype_ctr=0; | |
194 int SharedRuntime::_jbyte_array_copy_ctr=0; | |
195 int SharedRuntime::_jshort_array_copy_ctr=0; | |
196 int SharedRuntime::_jint_array_copy_ctr=0; | |
197 int SharedRuntime::_jlong_array_copy_ctr=0; | |
198 int SharedRuntime::_oop_array_copy_ctr=0; | |
199 int SharedRuntime::_checkcast_array_copy_ctr=0; | |
200 int SharedRuntime::_unsafe_array_copy_ctr=0; | |
201 int SharedRuntime::_generic_array_copy_ctr=0; | |
202 int SharedRuntime::_slow_array_copy_ctr=0; | |
203 int SharedRuntime::_find_handler_ctr=0; | |
204 int SharedRuntime::_rethrow_ctr=0; | |
205 | |
206 int SharedRuntime::_ICmiss_index = 0; | |
207 int SharedRuntime::_ICmiss_count[SharedRuntime::maxICmiss_count]; | |
208 address SharedRuntime::_ICmiss_at[SharedRuntime::maxICmiss_count]; | |
209 | |
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210 |
0 | 211 void SharedRuntime::trace_ic_miss(address at) { |
212 for (int i = 0; i < _ICmiss_index; i++) { | |
213 if (_ICmiss_at[i] == at) { | |
214 _ICmiss_count[i]++; | |
215 return; | |
216 } | |
217 } | |
218 int index = _ICmiss_index++; | |
219 if (_ICmiss_index >= maxICmiss_count) _ICmiss_index = maxICmiss_count - 1; | |
220 _ICmiss_at[index] = at; | |
221 _ICmiss_count[index] = 1; | |
222 } | |
223 | |
224 void SharedRuntime::print_ic_miss_histogram() { | |
225 if (ICMissHistogram) { | |
226 tty->print_cr ("IC Miss Histogram:"); | |
227 int tot_misses = 0; | |
228 for (int i = 0; i < _ICmiss_index; i++) { | |
229 tty->print_cr(" at: " INTPTR_FORMAT " nof: %d", _ICmiss_at[i], _ICmiss_count[i]); | |
230 tot_misses += _ICmiss_count[i]; | |
231 } | |
232 tty->print_cr ("Total IC misses: %7d", tot_misses); | |
233 } | |
234 } | |
235 #endif // PRODUCT | |
236 | |
342
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237 #ifndef SERIALGC |
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238 |
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239 // G1 write-barrier pre: executed before a pointer store. |
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240 JRT_LEAF(void, SharedRuntime::g1_wb_pre(oopDesc* orig, JavaThread *thread)) |
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241 if (orig == NULL) { |
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242 assert(false, "should be optimized out"); |
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243 return; |
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244 } |
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245 assert(orig->is_oop(true /* ignore mark word */), "Error"); |
342
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246 // store the original value that was in the field reference |
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247 thread->satb_mark_queue().enqueue(orig); |
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248 JRT_END |
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249 |
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250 // G1 write-barrier post: executed after a pointer store. |
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251 JRT_LEAF(void, SharedRuntime::g1_wb_post(void* card_addr, JavaThread* thread)) |
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252 thread->dirty_card_queue().enqueue(card_addr); |
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253 JRT_END |
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254 |
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255 #endif // !SERIALGC |
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256 |
0 | 257 |
258 JRT_LEAF(jlong, SharedRuntime::lmul(jlong y, jlong x)) | |
259 return x * y; | |
260 JRT_END | |
261 | |
262 | |
263 JRT_LEAF(jlong, SharedRuntime::ldiv(jlong y, jlong x)) | |
264 if (x == min_jlong && y == CONST64(-1)) { | |
265 return x; | |
266 } else { | |
267 return x / y; | |
268 } | |
269 JRT_END | |
270 | |
271 | |
272 JRT_LEAF(jlong, SharedRuntime::lrem(jlong y, jlong x)) | |
273 if (x == min_jlong && y == CONST64(-1)) { | |
274 return 0; | |
275 } else { | |
276 return x % y; | |
277 } | |
278 JRT_END | |
279 | |
280 | |
281 const juint float_sign_mask = 0x7FFFFFFF; | |
282 const juint float_infinity = 0x7F800000; | |
283 const julong double_sign_mask = CONST64(0x7FFFFFFFFFFFFFFF); | |
284 const julong double_infinity = CONST64(0x7FF0000000000000); | |
285 | |
286 JRT_LEAF(jfloat, SharedRuntime::frem(jfloat x, jfloat y)) | |
287 #ifdef _WIN64 | |
288 // 64-bit Windows on amd64 returns the wrong values for | |
289 // infinity operands. | |
290 union { jfloat f; juint i; } xbits, ybits; | |
291 xbits.f = x; | |
292 ybits.f = y; | |
293 // x Mod Infinity == x unless x is infinity | |
294 if ( ((xbits.i & float_sign_mask) != float_infinity) && | |
295 ((ybits.i & float_sign_mask) == float_infinity) ) { | |
296 return x; | |
297 } | |
298 #endif | |
299 return ((jfloat)fmod((double)x,(double)y)); | |
300 JRT_END | |
301 | |
302 | |
303 JRT_LEAF(jdouble, SharedRuntime::drem(jdouble x, jdouble y)) | |
304 #ifdef _WIN64 | |
305 union { jdouble d; julong l; } xbits, ybits; | |
306 xbits.d = x; | |
307 ybits.d = y; | |
308 // x Mod Infinity == x unless x is infinity | |
309 if ( ((xbits.l & double_sign_mask) != double_infinity) && | |
310 ((ybits.l & double_sign_mask) == double_infinity) ) { | |
311 return x; | |
312 } | |
313 #endif | |
314 return ((jdouble)fmod((double)x,(double)y)); | |
315 JRT_END | |
316 | |
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317 #ifdef __SOFTFP__ |
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318 JRT_LEAF(jfloat, SharedRuntime::fadd(jfloat x, jfloat y)) |
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319 return x + y; |
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320 JRT_END |
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321 |
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322 JRT_LEAF(jfloat, SharedRuntime::fsub(jfloat x, jfloat y)) |
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323 return x - y; |
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324 JRT_END |
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325 |
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326 JRT_LEAF(jfloat, SharedRuntime::fmul(jfloat x, jfloat y)) |
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327 return x * y; |
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328 JRT_END |
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329 |
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330 JRT_LEAF(jfloat, SharedRuntime::fdiv(jfloat x, jfloat y)) |
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331 return x / y; |
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332 JRT_END |
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333 |
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334 JRT_LEAF(jdouble, SharedRuntime::dadd(jdouble x, jdouble y)) |
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335 return x + y; |
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336 JRT_END |
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337 |
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338 JRT_LEAF(jdouble, SharedRuntime::dsub(jdouble x, jdouble y)) |
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339 return x - y; |
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340 JRT_END |
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341 |
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342 JRT_LEAF(jdouble, SharedRuntime::dmul(jdouble x, jdouble y)) |
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343 return x * y; |
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344 JRT_END |
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345 |
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346 JRT_LEAF(jdouble, SharedRuntime::ddiv(jdouble x, jdouble y)) |
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347 return x / y; |
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348 JRT_END |
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349 |
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350 JRT_LEAF(jfloat, SharedRuntime::i2f(jint x)) |
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351 return (jfloat)x; |
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352 JRT_END |
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353 |
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354 JRT_LEAF(jdouble, SharedRuntime::i2d(jint x)) |
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355 return (jdouble)x; |
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356 JRT_END |
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357 |
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358 JRT_LEAF(jdouble, SharedRuntime::f2d(jfloat x)) |
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359 return (jdouble)x; |
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360 JRT_END |
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361 |
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362 JRT_LEAF(int, SharedRuntime::fcmpl(float x, float y)) |
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363 return x>y ? 1 : (x==y ? 0 : -1); /* x<y or is_nan*/ |
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364 JRT_END |
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365 |
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366 JRT_LEAF(int, SharedRuntime::fcmpg(float x, float y)) |
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367 return x<y ? -1 : (x==y ? 0 : 1); /* x>y or is_nan */ |
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368 JRT_END |
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369 |
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370 JRT_LEAF(int, SharedRuntime::dcmpl(double x, double y)) |
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371 return x>y ? 1 : (x==y ? 0 : -1); /* x<y or is_nan */ |
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372 JRT_END |
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373 |
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374 JRT_LEAF(int, SharedRuntime::dcmpg(double x, double y)) |
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375 return x<y ? -1 : (x==y ? 0 : 1); /* x>y or is_nan */ |
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376 JRT_END |
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377 |
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378 // Functions to return the opposite of the aeabi functions for nan. |
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379 JRT_LEAF(int, SharedRuntime::unordered_fcmplt(float x, float y)) |
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380 return (x < y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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381 JRT_END |
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382 |
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383 JRT_LEAF(int, SharedRuntime::unordered_dcmplt(double x, double y)) |
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384 return (x < y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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385 JRT_END |
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386 |
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387 JRT_LEAF(int, SharedRuntime::unordered_fcmple(float x, float y)) |
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388 return (x <= y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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389 JRT_END |
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390 |
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391 JRT_LEAF(int, SharedRuntime::unordered_dcmple(double x, double y)) |
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392 return (x <= y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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393 JRT_END |
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394 |
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395 JRT_LEAF(int, SharedRuntime::unordered_fcmpge(float x, float y)) |
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396 return (x >= y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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397 JRT_END |
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398 |
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399 JRT_LEAF(int, SharedRuntime::unordered_dcmpge(double x, double y)) |
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400 return (x >= y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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401 JRT_END |
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402 |
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403 JRT_LEAF(int, SharedRuntime::unordered_fcmpgt(float x, float y)) |
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404 return (x > y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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405 JRT_END |
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406 |
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407 JRT_LEAF(int, SharedRuntime::unordered_dcmpgt(double x, double y)) |
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408 return (x > y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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409 JRT_END |
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410 |
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411 // Intrinsics make gcc generate code for these. |
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412 float SharedRuntime::fneg(float f) { |
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413 return -f; |
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414 } |
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415 |
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416 double SharedRuntime::dneg(double f) { |
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417 return -f; |
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418 } |
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419 |
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420 #endif // __SOFTFP__ |
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421 |
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422 #if defined(__SOFTFP__) || defined(E500V2) |
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423 // Intrinsics make gcc generate code for these. |
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424 double SharedRuntime::dabs(double f) { |
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425 return (f <= (double)0.0) ? (double)0.0 - f : f; |
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426 } |
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427 |
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428 #endif |
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429 |
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430 #if defined(__SOFTFP__) || defined(PPC) |
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431 double SharedRuntime::dsqrt(double f) { |
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432 return sqrt(f); |
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433 } |
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434 #endif |
0 | 435 |
436 JRT_LEAF(jint, SharedRuntime::f2i(jfloat x)) | |
508
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437 if (g_isnan(x)) |
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438 return 0; |
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439 if (x >= (jfloat) max_jint) |
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440 return max_jint; |
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441 if (x <= (jfloat) min_jint) |
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442 return min_jint; |
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443 return (jint) x; |
0 | 444 JRT_END |
445 | |
446 | |
447 JRT_LEAF(jlong, SharedRuntime::f2l(jfloat x)) | |
508
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448 if (g_isnan(x)) |
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449 return 0; |
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450 if (x >= (jfloat) max_jlong) |
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451 return max_jlong; |
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452 if (x <= (jfloat) min_jlong) |
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453 return min_jlong; |
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454 return (jlong) x; |
0 | 455 JRT_END |
456 | |
457 | |
458 JRT_LEAF(jint, SharedRuntime::d2i(jdouble x)) | |
508
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459 if (g_isnan(x)) |
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460 return 0; |
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461 if (x >= (jdouble) max_jint) |
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462 return max_jint; |
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463 if (x <= (jdouble) min_jint) |
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464 return min_jint; |
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465 return (jint) x; |
0 | 466 JRT_END |
467 | |
468 | |
469 JRT_LEAF(jlong, SharedRuntime::d2l(jdouble x)) | |
508
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470 if (g_isnan(x)) |
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471 return 0; |
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472 if (x >= (jdouble) max_jlong) |
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473 return max_jlong; |
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474 if (x <= (jdouble) min_jlong) |
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475 return min_jlong; |
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476 return (jlong) x; |
0 | 477 JRT_END |
478 | |
479 | |
480 JRT_LEAF(jfloat, SharedRuntime::d2f(jdouble x)) | |
481 return (jfloat)x; | |
482 JRT_END | |
483 | |
484 | |
485 JRT_LEAF(jfloat, SharedRuntime::l2f(jlong x)) | |
486 return (jfloat)x; | |
487 JRT_END | |
488 | |
489 | |
490 JRT_LEAF(jdouble, SharedRuntime::l2d(jlong x)) | |
491 return (jdouble)x; | |
492 JRT_END | |
493 | |
494 // Exception handling accross interpreter/compiler boundaries | |
495 // | |
496 // exception_handler_for_return_address(...) returns the continuation address. | |
497 // The continuation address is the entry point of the exception handler of the | |
498 // previous frame depending on the return address. | |
499 | |
1295 | 500 address SharedRuntime::raw_exception_handler_for_return_address(JavaThread* thread, address return_address) { |
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501 assert(frame::verify_return_pc(return_address), err_msg("must be a return address: " INTPTR_FORMAT, return_address)); |
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502 |
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503 // Reset method handle flag. |
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504 thread->set_is_method_handle_return(false); |
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505 |
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506 // The fastest case first |
0 | 507 CodeBlob* blob = CodeCache::find_blob(return_address); |
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508 nmethod* nm = (blob != NULL) ? blob->as_nmethod_or_null() : NULL; |
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509 if (nm != NULL) { |
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510 // Set flag if return address is a method handle call site. |
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511 thread->set_is_method_handle_return(nm->is_method_handle_return(return_address)); |
0 | 512 // native nmethods don't have exception handlers |
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513 assert(!nm->is_native_method(), "no exception handler"); |
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514 assert(nm->header_begin() != nm->exception_begin(), "no exception handler"); |
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515 if (nm->is_deopt_pc(return_address)) { |
0 | 516 return SharedRuntime::deopt_blob()->unpack_with_exception(); |
517 } else { | |
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518 return nm->exception_begin(); |
0 | 519 } |
520 } | |
521 | |
522 // Entry code | |
523 if (StubRoutines::returns_to_call_stub(return_address)) { | |
524 return StubRoutines::catch_exception_entry(); | |
525 } | |
526 // Interpreted code | |
527 if (Interpreter::contains(return_address)) { | |
528 return Interpreter::rethrow_exception_entry(); | |
529 } | |
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530 // Ricochet frame unwind code |
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531 if (SharedRuntime::ricochet_blob() != NULL && SharedRuntime::ricochet_blob()->returns_to_bounce_addr(return_address)) { |
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532 return SharedRuntime::ricochet_blob()->exception_addr(); |
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533 } |
0 | 534 |
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535 guarantee(blob == NULL || !blob->is_runtime_stub(), "caller should have skipped stub"); |
0 | 536 guarantee(!VtableStubs::contains(return_address), "NULL exceptions in vtables should have been handled already!"); |
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537 |
0 | 538 #ifndef PRODUCT |
539 { ResourceMark rm; | |
540 tty->print_cr("No exception handler found for exception at " INTPTR_FORMAT " - potential problems:", return_address); | |
541 tty->print_cr("a) exception happened in (new?) code stubs/buffers that is not handled here"); | |
542 tty->print_cr("b) other problem"); | |
543 } | |
544 #endif // PRODUCT | |
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545 |
0 | 546 ShouldNotReachHere(); |
547 return NULL; | |
548 } | |
549 | |
550 | |
1295 | 551 JRT_LEAF(address, SharedRuntime::exception_handler_for_return_address(JavaThread* thread, address return_address)) |
552 return raw_exception_handler_for_return_address(thread, return_address); | |
0 | 553 JRT_END |
554 | |
1295 | 555 |
0 | 556 address SharedRuntime::get_poll_stub(address pc) { |
557 address stub; | |
558 // Look up the code blob | |
559 CodeBlob *cb = CodeCache::find_blob(pc); | |
560 | |
561 // Should be an nmethod | |
562 assert( cb && cb->is_nmethod(), "safepoint polling: pc must refer to an nmethod" ); | |
563 | |
564 // Look up the relocation information | |
565 assert( ((nmethod*)cb)->is_at_poll_or_poll_return(pc), | |
566 "safepoint polling: type must be poll" ); | |
567 | |
568 assert( ((NativeInstruction*)pc)->is_safepoint_poll(), | |
569 "Only polling locations are used for safepoint"); | |
570 | |
571 bool at_poll_return = ((nmethod*)cb)->is_at_poll_return(pc); | |
572 if (at_poll_return) { | |
573 assert(SharedRuntime::polling_page_return_handler_blob() != NULL, | |
574 "polling page return stub not created yet"); | |
1748 | 575 stub = SharedRuntime::polling_page_return_handler_blob()->entry_point(); |
0 | 576 } else { |
577 assert(SharedRuntime::polling_page_safepoint_handler_blob() != NULL, | |
578 "polling page safepoint stub not created yet"); | |
1748 | 579 stub = SharedRuntime::polling_page_safepoint_handler_blob()->entry_point(); |
0 | 580 } |
581 #ifndef PRODUCT | |
582 if( TraceSafepoint ) { | |
583 char buf[256]; | |
584 jio_snprintf(buf, sizeof(buf), | |
585 "... found polling page %s exception at pc = " | |
586 INTPTR_FORMAT ", stub =" INTPTR_FORMAT, | |
587 at_poll_return ? "return" : "loop", | |
588 (intptr_t)pc, (intptr_t)stub); | |
589 tty->print_raw_cr(buf); | |
590 } | |
591 #endif // PRODUCT | |
592 return stub; | |
593 } | |
594 | |
595 | |
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596 oop SharedRuntime::retrieve_receiver( Symbol* sig, frame caller ) { |
0 | 597 assert(caller.is_interpreted_frame(), ""); |
598 int args_size = ArgumentSizeComputer(sig).size() + 1; | |
599 assert(args_size <= caller.interpreter_frame_expression_stack_size(), "receiver must be on interpreter stack"); | |
600 oop result = (oop) *caller.interpreter_frame_tos_at(args_size - 1); | |
601 assert(Universe::heap()->is_in(result) && result->is_oop(), "receiver must be an oop"); | |
602 return result; | |
603 } | |
604 | |
605 | |
606 void SharedRuntime::throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception) { | |
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607 if (JvmtiExport::can_post_on_exceptions()) { |
0 | 608 vframeStream vfst(thread, true); |
609 methodHandle method = methodHandle(thread, vfst.method()); | |
610 address bcp = method()->bcp_from(vfst.bci()); | |
611 JvmtiExport::post_exception_throw(thread, method(), bcp, h_exception()); | |
612 } | |
613 Exceptions::_throw(thread, __FILE__, __LINE__, h_exception); | |
614 } | |
615 | |
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616 void SharedRuntime::throw_and_post_jvmti_exception(JavaThread *thread, Symbol* name, const char *message) { |
0 | 617 Handle h_exception = Exceptions::new_exception(thread, name, message); |
618 throw_and_post_jvmti_exception(thread, h_exception); | |
619 } | |
620 | |
610
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621 // The interpreter code to call this tracing function is only |
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622 // called/generated when TraceRedefineClasses has the right bits |
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623 // set. Since obsolete methods are never compiled, we don't have |
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624 // to modify the compilers to generate calls to this function. |
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625 // |
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626 JRT_LEAF(int, SharedRuntime::rc_trace_method_entry( |
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627 JavaThread* thread, methodOopDesc* method)) |
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628 assert(RC_TRACE_IN_RANGE(0x00001000, 0x00002000), "wrong call"); |
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629 |
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630 if (method->is_obsolete()) { |
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631 // We are calling an obsolete method, but this is not necessarily |
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632 // an error. Our method could have been redefined just after we |
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633 // fetched the methodOop from the constant pool. |
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634 |
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635 // RC_TRACE macro has an embedded ResourceMark |
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636 RC_TRACE_WITH_THREAD(0x00001000, thread, |
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637 ("calling obsolete method '%s'", |
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638 method->name_and_sig_as_C_string())); |
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639 if (RC_TRACE_ENABLED(0x00002000)) { |
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640 // this option is provided to debug calls to obsolete methods |
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641 guarantee(false, "faulting at call to an obsolete method."); |
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642 } |
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643 } |
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644 return 0; |
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645 JRT_END |
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646 |
0 | 647 // ret_pc points into caller; we are returning caller's exception handler |
648 // for given exception | |
649 address SharedRuntime::compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception, | |
650 bool force_unwind, bool top_frame_only) { | |
651 assert(nm != NULL, "must exist"); | |
652 ResourceMark rm; | |
653 | |
654 ScopeDesc* sd = nm->scope_desc_at(ret_pc); | |
655 // determine handler bci, if any | |
656 EXCEPTION_MARK; | |
657 | |
658 int handler_bci = -1; | |
659 int scope_depth = 0; | |
660 if (!force_unwind) { | |
661 int bci = sd->bci(); | |
662 do { | |
663 bool skip_scope_increment = false; | |
664 // exception handler lookup | |
665 KlassHandle ek (THREAD, exception->klass()); | |
666 handler_bci = sd->method()->fast_exception_handler_bci_for(ek, bci, THREAD); | |
667 if (HAS_PENDING_EXCEPTION) { | |
668 // We threw an exception while trying to find the exception handler. | |
669 // Transfer the new exception to the exception handle which will | |
670 // be set into thread local storage, and do another lookup for an | |
671 // exception handler for this exception, this time starting at the | |
672 // BCI of the exception handler which caused the exception to be | |
673 // thrown (bugs 4307310 and 4546590). Set "exception" reference | |
674 // argument to ensure that the correct exception is thrown (4870175). | |
675 exception = Handle(THREAD, PENDING_EXCEPTION); | |
676 CLEAR_PENDING_EXCEPTION; | |
677 if (handler_bci >= 0) { | |
678 bci = handler_bci; | |
679 handler_bci = -1; | |
680 skip_scope_increment = true; | |
681 } | |
682 } | |
683 if (!top_frame_only && handler_bci < 0 && !skip_scope_increment) { | |
684 sd = sd->sender(); | |
685 if (sd != NULL) { | |
686 bci = sd->bci(); | |
687 } | |
688 ++scope_depth; | |
689 } | |
690 } while (!top_frame_only && handler_bci < 0 && sd != NULL); | |
691 } | |
692 | |
693 // found handling method => lookup exception handler | |
1748 | 694 int catch_pco = ret_pc - nm->code_begin(); |
0 | 695 |
696 ExceptionHandlerTable table(nm); | |
697 HandlerTableEntry *t = table.entry_for(catch_pco, handler_bci, scope_depth); | |
698 if (t == NULL && (nm->is_compiled_by_c1() || handler_bci != -1)) { | |
699 // Allow abbreviated catch tables. The idea is to allow a method | |
700 // to materialize its exceptions without committing to the exact | |
701 // routing of exceptions. In particular this is needed for adding | |
702 // a synthethic handler to unlock monitors when inlining | |
703 // synchonized methods since the unlock path isn't represented in | |
704 // the bytecodes. | |
705 t = table.entry_for(catch_pco, -1, 0); | |
706 } | |
707 | |
1378
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708 #ifdef COMPILER1 |
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709 if (t == NULL && nm->is_compiled_by_c1()) { |
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710 assert(nm->unwind_handler_begin() != NULL, ""); |
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711 return nm->unwind_handler_begin(); |
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712 } |
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713 #endif |
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714 |
0 | 715 if (t == NULL) { |
716 tty->print_cr("MISSING EXCEPTION HANDLER for pc " INTPTR_FORMAT " and handler bci %d", ret_pc, handler_bci); | |
717 tty->print_cr(" Exception:"); | |
718 exception->print(); | |
719 tty->cr(); | |
720 tty->print_cr(" Compiled exception table :"); | |
721 table.print(); | |
722 nm->print_code(); | |
723 guarantee(false, "missing exception handler"); | |
724 return NULL; | |
725 } | |
726 | |
1748 | 727 return nm->code_begin() + t->pco(); |
0 | 728 } |
729 | |
730 JRT_ENTRY(void, SharedRuntime::throw_AbstractMethodError(JavaThread* thread)) | |
731 // These errors occur only at call sites | |
732 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_AbstractMethodError()); | |
733 JRT_END | |
734 | |
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735 JRT_ENTRY(void, SharedRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) |
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736 // These errors occur only at call sites |
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737 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_IncompatibleClassChangeError(), "vtable stub"); |
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738 JRT_END |
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739 |
0 | 740 JRT_ENTRY(void, SharedRuntime::throw_ArithmeticException(JavaThread* thread)) |
741 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_ArithmeticException(), "/ by zero"); | |
742 JRT_END | |
743 | |
744 JRT_ENTRY(void, SharedRuntime::throw_NullPointerException(JavaThread* thread)) | |
745 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_NullPointerException()); | |
746 JRT_END | |
747 | |
748 JRT_ENTRY(void, SharedRuntime::throw_NullPointerException_at_call(JavaThread* thread)) | |
749 // This entry point is effectively only used for NullPointerExceptions which occur at inline | |
750 // cache sites (when the callee activation is not yet set up) so we are at a call site | |
751 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_NullPointerException()); | |
752 JRT_END | |
753 | |
754 JRT_ENTRY(void, SharedRuntime::throw_StackOverflowError(JavaThread* thread)) | |
755 // We avoid using the normal exception construction in this case because | |
756 // it performs an upcall to Java, and we're already out of stack space. | |
757 klassOop k = SystemDictionary::StackOverflowError_klass(); | |
758 oop exception_oop = instanceKlass::cast(k)->allocate_instance(CHECK); | |
759 Handle exception (thread, exception_oop); | |
760 if (StackTraceInThrowable) { | |
761 java_lang_Throwable::fill_in_stack_trace(exception); | |
762 } | |
763 throw_and_post_jvmti_exception(thread, exception); | |
764 JRT_END | |
765 | |
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766 JRT_ENTRY(void, SharedRuntime::throw_WrongMethodTypeException(JavaThread* thread, oopDesc* required, oopDesc* actual)) |
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767 assert(thread == JavaThread::current() && required->is_oop() && actual->is_oop(), "bad args"); |
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768 ResourceMark rm; |
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769 char* message = SharedRuntime::generate_wrong_method_type_message(thread, required, actual); |
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770 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_invoke_WrongMethodTypeException(), message); |
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771 JRT_END |
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772 |
0 | 773 address SharedRuntime::continuation_for_implicit_exception(JavaThread* thread, |
774 address pc, | |
775 SharedRuntime::ImplicitExceptionKind exception_kind) | |
776 { | |
777 address target_pc = NULL; | |
778 | |
779 if (Interpreter::contains(pc)) { | |
780 #ifdef CC_INTERP | |
781 // C++ interpreter doesn't throw implicit exceptions | |
782 ShouldNotReachHere(); | |
783 #else | |
784 switch (exception_kind) { | |
785 case IMPLICIT_NULL: return Interpreter::throw_NullPointerException_entry(); | |
786 case IMPLICIT_DIVIDE_BY_ZERO: return Interpreter::throw_ArithmeticException_entry(); | |
787 case STACK_OVERFLOW: return Interpreter::throw_StackOverflowError_entry(); | |
788 default: ShouldNotReachHere(); | |
789 } | |
790 #endif // !CC_INTERP | |
791 } else { | |
792 switch (exception_kind) { | |
793 case STACK_OVERFLOW: { | |
794 // Stack overflow only occurs upon frame setup; the callee is | |
795 // going to be unwound. Dispatch to a shared runtime stub | |
796 // which will cause the StackOverflowError to be fabricated | |
797 // and processed. | |
798 // For stack overflow in deoptimization blob, cleanup thread. | |
799 if (thread->deopt_mark() != NULL) { | |
800 Deoptimization::cleanup_deopt_info(thread, NULL); | |
801 } | |
802 return StubRoutines::throw_StackOverflowError_entry(); | |
803 } | |
804 | |
805 case IMPLICIT_NULL: { | |
806 if (VtableStubs::contains(pc)) { | |
807 // We haven't yet entered the callee frame. Fabricate an | |
808 // exception and begin dispatching it in the caller. Since | |
809 // the caller was at a call site, it's safe to destroy all | |
810 // caller-saved registers, as these entry points do. | |
811 VtableStub* vt_stub = VtableStubs::stub_containing(pc); | |
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812 |
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813 // If vt_stub is NULL, then return NULL to signal handler to report the SEGV error. |
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814 if (vt_stub == NULL) return NULL; |
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815 |
0 | 816 if (vt_stub->is_abstract_method_error(pc)) { |
817 assert(!vt_stub->is_vtable_stub(), "should never see AbstractMethodErrors from vtable-type VtableStubs"); | |
818 return StubRoutines::throw_AbstractMethodError_entry(); | |
819 } else { | |
820 return StubRoutines::throw_NullPointerException_at_call_entry(); | |
821 } | |
822 } else { | |
823 CodeBlob* cb = CodeCache::find_blob(pc); | |
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824 |
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825 // If code blob is NULL, then return NULL to signal handler to report the SEGV error. |
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826 if (cb == NULL) return NULL; |
0 | 827 |
828 // Exception happened in CodeCache. Must be either: | |
829 // 1. Inline-cache check in C2I handler blob, | |
830 // 2. Inline-cache check in nmethod, or | |
831 // 3. Implict null exception in nmethod | |
832 | |
833 if (!cb->is_nmethod()) { | |
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834 guarantee(cb->is_adapter_blob() || cb->is_method_handles_adapter_blob(), |
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835 "exception happened outside interpreter, nmethods and vtable stubs (1)"); |
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 | |
847 return StubRoutines::throw_NullPointerException_at_call_entry(); | |
848 } | |
849 | |
850 #ifndef PRODUCT | |
851 _implicit_null_throws++; | |
852 #endif | |
853 target_pc = nm->continuation_for_implicit_exception(pc); | |
1250 | 854 // If there's an unexpected fault, target_pc might be NULL, |
855 // in which case we want to fall through into the normal | |
856 // error handling code. | |
0 | 857 } |
858 | |
859 break; // fall through | |
860 } | |
861 | |
862 | |
863 case IMPLICIT_DIVIDE_BY_ZERO: { | |
864 nmethod* nm = CodeCache::find_nmethod(pc); | |
865 guarantee(nm != NULL, "must have containing nmethod for implicit division-by-zero exceptions"); | |
866 #ifndef PRODUCT | |
867 _implicit_div0_throws++; | |
868 #endif | |
869 target_pc = nm->continuation_for_implicit_exception(pc); | |
1250 | 870 // If there's an unexpected fault, target_pc might be NULL, |
871 // in which case we want to fall through into the normal | |
872 // error handling code. | |
0 | 873 break; // fall through |
874 } | |
875 | |
876 default: ShouldNotReachHere(); | |
877 } | |
878 | |
879 assert(exception_kind == IMPLICIT_NULL || exception_kind == IMPLICIT_DIVIDE_BY_ZERO, "wrong implicit exception kind"); | |
880 | |
881 // for AbortVMOnException flag | |
882 NOT_PRODUCT(Exceptions::debug_check_abort("java.lang.NullPointerException")); | |
883 if (exception_kind == IMPLICIT_NULL) { | |
884 Events::log("Implicit null exception at " INTPTR_FORMAT " to " INTPTR_FORMAT, pc, target_pc); | |
885 } else { | |
886 Events::log("Implicit division by zero exception at " INTPTR_FORMAT " to " INTPTR_FORMAT, pc, target_pc); | |
887 } | |
888 return target_pc; | |
889 } | |
890 | |
891 ShouldNotReachHere(); | |
892 return NULL; | |
893 } | |
894 | |
895 | |
896 JNI_ENTRY(void, throw_unsatisfied_link_error(JNIEnv* env, ...)) | |
897 { | |
898 THROW(vmSymbols::java_lang_UnsatisfiedLinkError()); | |
899 } | |
900 JNI_END | |
901 | |
902 | |
903 address SharedRuntime::native_method_throw_unsatisfied_link_error_entry() { | |
904 return CAST_FROM_FN_PTR(address, &throw_unsatisfied_link_error); | |
905 } | |
906 | |
907 | |
908 #ifndef PRODUCT | |
909 JRT_ENTRY(intptr_t, SharedRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2)) | |
910 const frame f = thread->last_frame(); | |
911 assert(f.is_interpreted_frame(), "must be an interpreted frame"); | |
912 #ifndef PRODUCT | |
913 methodHandle mh(THREAD, f.interpreter_frame_method()); | |
914 BytecodeTracer::trace(mh, f.interpreter_frame_bcp(), tos, tos2); | |
915 #endif // !PRODUCT | |
916 return preserve_this_value; | |
917 JRT_END | |
918 #endif // !PRODUCT | |
919 | |
920 | |
921 JRT_ENTRY(void, SharedRuntime::yield_all(JavaThread* thread, int attempts)) | |
922 os::yield_all(attempts); | |
923 JRT_END | |
924 | |
925 | |
926 JRT_ENTRY_NO_ASYNC(void, SharedRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) | |
927 assert(obj->is_oop(), "must be a valid oop"); | |
928 assert(obj->klass()->klass_part()->has_finalizer(), "shouldn't be here otherwise"); | |
929 instanceKlass::register_finalizer(instanceOop(obj), CHECK); | |
930 JRT_END | |
931 | |
932 | |
933 jlong SharedRuntime::get_java_tid(Thread* thread) { | |
934 if (thread != NULL) { | |
935 if (thread->is_Java_thread()) { | |
936 oop obj = ((JavaThread*)thread)->threadObj(); | |
937 return (obj == NULL) ? 0 : java_lang_Thread::thread_id(obj); | |
938 } | |
939 } | |
940 return 0; | |
941 } | |
942 | |
943 /** | |
944 * This function ought to be a void function, but cannot be because | |
945 * it gets turned into a tail-call on sparc, which runs into dtrace bug | |
946 * 6254741. Once that is fixed we can remove the dummy return value. | |
947 */ | |
948 int SharedRuntime::dtrace_object_alloc(oopDesc* o) { | |
949 return dtrace_object_alloc_base(Thread::current(), o); | |
950 } | |
951 | |
952 int SharedRuntime::dtrace_object_alloc_base(Thread* thread, oopDesc* o) { | |
953 assert(DTraceAllocProbes, "wrong call"); | |
954 Klass* klass = o->blueprint(); | |
955 int size = o->size(); | |
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956 Symbol* name = klass->name(); |
0 | 957 HS_DTRACE_PROBE4(hotspot, object__alloc, get_java_tid(thread), |
958 name->bytes(), name->utf8_length(), size * HeapWordSize); | |
959 return 0; | |
960 } | |
961 | |
962 JRT_LEAF(int, SharedRuntime::dtrace_method_entry( | |
963 JavaThread* thread, methodOopDesc* method)) | |
964 assert(DTraceMethodProbes, "wrong call"); | |
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965 Symbol* kname = method->klass_name(); |
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966 Symbol* name = method->name(); |
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967 Symbol* sig = method->signature(); |
0 | 968 HS_DTRACE_PROBE7(hotspot, method__entry, get_java_tid(thread), |
969 kname->bytes(), kname->utf8_length(), | |
970 name->bytes(), name->utf8_length(), | |
971 sig->bytes(), sig->utf8_length()); | |
972 return 0; | |
973 JRT_END | |
974 | |
975 JRT_LEAF(int, SharedRuntime::dtrace_method_exit( | |
976 JavaThread* thread, methodOopDesc* method)) | |
977 assert(DTraceMethodProbes, "wrong call"); | |
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978 Symbol* kname = method->klass_name(); |
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979 Symbol* name = method->name(); |
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980 Symbol* sig = method->signature(); |
0 | 981 HS_DTRACE_PROBE7(hotspot, method__return, get_java_tid(thread), |
982 kname->bytes(), kname->utf8_length(), | |
983 name->bytes(), name->utf8_length(), | |
984 sig->bytes(), sig->utf8_length()); | |
985 return 0; | |
986 JRT_END | |
987 | |
988 | |
989 // Finds receiver, CallInfo (i.e. receiver method), and calling bytecode) | |
990 // for a call current in progress, i.e., arguments has been pushed on stack | |
991 // put callee has not been invoked yet. Used by: resolve virtual/static, | |
992 // vtable updates, etc. Caller frame must be compiled. | |
993 Handle SharedRuntime::find_callee_info(JavaThread* thread, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS) { | |
994 ResourceMark rm(THREAD); | |
995 | |
996 // last java frame on stack (which includes native call frames) | |
997 vframeStream vfst(thread, true); // Do not skip and javaCalls | |
998 | |
999 return find_callee_info_helper(thread, vfst, bc, callinfo, CHECK_(Handle())); | |
1000 } | |
1001 | |
1002 | |
1003 // Finds receiver, CallInfo (i.e. receiver method), and calling bytecode | |
1004 // for a call current in progress, i.e., arguments has been pushed on stack | |
1005 // but callee has not been invoked yet. Caller frame must be compiled. | |
1006 Handle SharedRuntime::find_callee_info_helper(JavaThread* thread, | |
1007 vframeStream& vfst, | |
1008 Bytecodes::Code& bc, | |
1009 CallInfo& callinfo, TRAPS) { | |
1010 Handle receiver; | |
1011 Handle nullHandle; //create a handy null handle for exception returns | |
1012 | |
1013 assert(!vfst.at_end(), "Java frame must exist"); | |
1014 | |
1015 // Find caller and bci from vframe | |
1016 methodHandle caller (THREAD, vfst.method()); | |
1017 int bci = vfst.bci(); | |
1018 | |
1019 // Find bytecode | |
2142 | 1020 Bytecode_invoke bytecode(caller, bci); |
1021 bc = bytecode.java_code(); | |
1022 int bytecode_index = bytecode.index(); | |
0 | 1023 |
1024 // Find receiver for non-static call | |
1025 if (bc != Bytecodes::_invokestatic) { | |
1026 // This register map must be update since we need to find the receiver for | |
1027 // compiled frames. The receiver might be in a register. | |
1028 RegisterMap reg_map2(thread); | |
1029 frame stubFrame = thread->last_frame(); | |
1030 // Caller-frame is a compiled frame | |
1031 frame callerFrame = stubFrame.sender(®_map2); | |
1032 | |
2142 | 1033 methodHandle callee = bytecode.static_target(CHECK_(nullHandle)); |
0 | 1034 if (callee.is_null()) { |
1035 THROW_(vmSymbols::java_lang_NoSuchMethodException(), nullHandle); | |
1036 } | |
1037 // Retrieve from a compiled argument list | |
1038 receiver = Handle(THREAD, callerFrame.retrieve_receiver(®_map2)); | |
1039 | |
1040 if (receiver.is_null()) { | |
1041 THROW_(vmSymbols::java_lang_NullPointerException(), nullHandle); | |
1042 } | |
1043 } | |
1044 | |
1045 // Resolve method. This is parameterized by bytecode. | |
1046 constantPoolHandle constants (THREAD, caller->constants()); | |
1047 assert (receiver.is_null() || receiver->is_oop(), "wrong receiver"); | |
1048 LinkResolver::resolve_invoke(callinfo, receiver, constants, bytecode_index, bc, CHECK_(nullHandle)); | |
1049 | |
1050 #ifdef ASSERT | |
1051 // Check that the receiver klass is of the right subtype and that it is initialized for virtual calls | |
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1052 if (bc != Bytecodes::_invokestatic && bc != Bytecodes::_invokedynamic) { |
0 | 1053 assert(receiver.not_null(), "should have thrown exception"); |
1054 KlassHandle receiver_klass (THREAD, receiver->klass()); | |
1055 klassOop rk = constants->klass_ref_at(bytecode_index, CHECK_(nullHandle)); | |
1056 // klass is already loaded | |
1057 KlassHandle static_receiver_klass (THREAD, rk); | |
1058 assert(receiver_klass->is_subtype_of(static_receiver_klass()), "actual receiver must be subclass of static receiver klass"); | |
1059 if (receiver_klass->oop_is_instance()) { | |
1060 if (instanceKlass::cast(receiver_klass())->is_not_initialized()) { | |
1061 tty->print_cr("ERROR: Klass not yet initialized!!"); | |
1062 receiver_klass.print(); | |
1063 } | |
1064 assert (!instanceKlass::cast(receiver_klass())->is_not_initialized(), "receiver_klass must be initialized"); | |
1065 } | |
1066 } | |
1067 #endif | |
1068 | |
1069 return receiver; | |
1070 } | |
1071 | |
1072 methodHandle SharedRuntime::find_callee_method(JavaThread* thread, TRAPS) { | |
1073 ResourceMark rm(THREAD); | |
1074 // We need first to check if any Java activations (compiled, interpreted) | |
1075 // exist on the stack since last JavaCall. If not, we need | |
1076 // to get the target method from the JavaCall wrapper. | |
1077 vframeStream vfst(thread, true); // Do not skip any javaCalls | |
1078 methodHandle callee_method; | |
1079 if (vfst.at_end()) { | |
1080 // No Java frames were found on stack since we did the JavaCall. | |
1081 // Hence the stack can only contain an entry_frame. We need to | |
1082 // find the target method from the stub frame. | |
1083 RegisterMap reg_map(thread, false); | |
1084 frame fr = thread->last_frame(); | |
1085 assert(fr.is_runtime_frame(), "must be a runtimeStub"); | |
1086 fr = fr.sender(®_map); | |
1087 assert(fr.is_entry_frame(), "must be"); | |
1088 // fr is now pointing to the entry frame. | |
1089 callee_method = methodHandle(THREAD, fr.entry_frame_call_wrapper()->callee_method()); | |
1090 assert(fr.entry_frame_call_wrapper()->receiver() == NULL || !callee_method->is_static(), "non-null receiver for static call??"); | |
1091 } else { | |
1092 Bytecodes::Code bc; | |
1093 CallInfo callinfo; | |
1094 find_callee_info_helper(thread, vfst, bc, callinfo, CHECK_(methodHandle())); | |
1095 callee_method = callinfo.selected_method(); | |
1096 } | |
1097 assert(callee_method()->is_method(), "must be"); | |
1098 return callee_method; | |
1099 } | |
1100 | |
1101 // Resolves a call. | |
1102 methodHandle SharedRuntime::resolve_helper(JavaThread *thread, | |
1103 bool is_virtual, | |
1104 bool is_optimized, TRAPS) { | |
1105 methodHandle callee_method; | |
1106 callee_method = resolve_sub_helper(thread, is_virtual, is_optimized, THREAD); | |
1107 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { | |
1108 int retry_count = 0; | |
1109 while (!HAS_PENDING_EXCEPTION && callee_method->is_old() && | |
1142 | 1110 callee_method->method_holder() != SystemDictionary::Object_klass()) { |
0 | 1111 // If has a pending exception then there is no need to re-try to |
1112 // resolve this method. | |
1113 // If the method has been redefined, we need to try again. | |
1114 // Hack: we have no way to update the vtables of arrays, so don't | |
1115 // require that java.lang.Object has been updated. | |
1116 | |
1117 // It is very unlikely that method is redefined more than 100 times | |
1118 // in the middle of resolve. If it is looping here more than 100 times | |
1119 // means then there could be a bug here. | |
1120 guarantee((retry_count++ < 100), | |
1121 "Could not resolve to latest version of redefined method"); | |
1122 // method is redefined in the middle of resolve so re-try. | |
1123 callee_method = resolve_sub_helper(thread, is_virtual, is_optimized, THREAD); | |
1124 } | |
1125 } | |
1126 return callee_method; | |
1127 } | |
1128 | |
1129 // Resolves a call. The compilers generate code for calls that go here | |
1130 // and are patched with the real destination of the call. | |
1131 methodHandle SharedRuntime::resolve_sub_helper(JavaThread *thread, | |
1132 bool is_virtual, | |
1133 bool is_optimized, TRAPS) { | |
1134 | |
1135 ResourceMark rm(thread); | |
1136 RegisterMap cbl_map(thread, false); | |
1137 frame caller_frame = thread->last_frame().sender(&cbl_map); | |
1138 | |
1295 | 1139 CodeBlob* caller_cb = caller_frame.cb(); |
1140 guarantee(caller_cb != NULL && caller_cb->is_nmethod(), "must be called from nmethod"); | |
1141 nmethod* caller_nm = caller_cb->as_nmethod_or_null(); | |
0 | 1142 // make sure caller is not getting deoptimized |
1143 // and removed before we are done with it. | |
1144 // CLEANUP - with lazy deopt shouldn't need this lock | |
1295 | 1145 nmethodLocker caller_lock(caller_nm); |
0 | 1146 |
1147 | |
1148 // determine call info & receiver | |
1149 // note: a) receiver is NULL for static calls | |
1150 // b) an exception is thrown if receiver is NULL for non-static calls | |
1151 CallInfo call_info; | |
1152 Bytecodes::Code invoke_code = Bytecodes::_illegal; | |
1153 Handle receiver = find_callee_info(thread, invoke_code, | |
1154 call_info, CHECK_(methodHandle())); | |
1155 methodHandle callee_method = call_info.selected_method(); | |
1156 | |
1157 assert((!is_virtual && invoke_code == Bytecodes::_invokestatic) || | |
1158 ( is_virtual && invoke_code != Bytecodes::_invokestatic), "inconsistent bytecode"); | |
1159 | |
1160 #ifndef PRODUCT | |
1161 // tracing/debugging/statistics | |
1162 int *addr = (is_optimized) ? (&_resolve_opt_virtual_ctr) : | |
1163 (is_virtual) ? (&_resolve_virtual_ctr) : | |
1164 (&_resolve_static_ctr); | |
1165 Atomic::inc(addr); | |
1166 | |
1167 if (TraceCallFixup) { | |
1168 ResourceMark rm(thread); | |
1169 tty->print("resolving %s%s (%s) call to", | |
1170 (is_optimized) ? "optimized " : "", (is_virtual) ? "virtual" : "static", | |
1171 Bytecodes::name(invoke_code)); | |
1172 callee_method->print_short_name(tty); | |
1173 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1174 } | |
1175 #endif | |
1176 | |
1295 | 1177 // JSR 292 |
1178 // If the resolved method is a MethodHandle invoke target the call | |
1179 // site must be a MethodHandle call site. | |
1180 if (callee_method->is_method_handle_invoke()) { | |
1181 assert(caller_nm->is_method_handle_return(caller_frame.pc()), "must be MH call site"); | |
1182 } | |
1183 | |
0 | 1184 // Compute entry points. This might require generation of C2I converter |
1185 // frames, so we cannot be holding any locks here. Furthermore, the | |
1186 // computation of the entry points is independent of patching the call. We | |
1187 // always return the entry-point, but we only patch the stub if the call has | |
1188 // not been deoptimized. Return values: For a virtual call this is an | |
1189 // (cached_oop, destination address) pair. For a static call/optimized | |
1190 // virtual this is just a destination address. | |
1191 | |
1192 StaticCallInfo static_call_info; | |
1193 CompiledICInfo virtual_call_info; | |
1194 | |
1195 // Make sure the callee nmethod does not get deoptimized and removed before | |
1196 // we are done patching the code. | |
1295 | 1197 nmethod* callee_nm = callee_method->code(); |
1198 nmethodLocker nl_callee(callee_nm); | |
0 | 1199 #ifdef ASSERT |
1295 | 1200 address dest_entry_point = callee_nm == NULL ? 0 : callee_nm->entry_point(); // used below |
0 | 1201 #endif |
1202 | |
1203 if (is_virtual) { | |
1204 assert(receiver.not_null(), "sanity check"); | |
1205 bool static_bound = call_info.resolved_method()->can_be_statically_bound(); | |
1206 KlassHandle h_klass(THREAD, receiver->klass()); | |
1207 CompiledIC::compute_monomorphic_entry(callee_method, h_klass, | |
1208 is_optimized, static_bound, virtual_call_info, | |
1209 CHECK_(methodHandle())); | |
1210 } else { | |
1211 // static call | |
1212 CompiledStaticCall::compute_entry(callee_method, static_call_info); | |
1213 } | |
1214 | |
1215 // grab lock, check for deoptimization and potentially patch caller | |
1216 { | |
1217 MutexLocker ml_patch(CompiledIC_lock); | |
1218 | |
1219 // Now that we are ready to patch if the methodOop was redefined then | |
1220 // don't update call site and let the caller retry. | |
1221 | |
1222 if (!callee_method->is_old()) { | |
1223 #ifdef ASSERT | |
1224 // We must not try to patch to jump to an already unloaded method. | |
1225 if (dest_entry_point != 0) { | |
1226 assert(CodeCache::find_blob(dest_entry_point) != NULL, | |
1227 "should not unload nmethod while locked"); | |
1228 } | |
1229 #endif | |
1230 if (is_virtual) { | |
1231 CompiledIC* inline_cache = CompiledIC_before(caller_frame.pc()); | |
1232 if (inline_cache->is_clean()) { | |
1233 inline_cache->set_to_monomorphic(virtual_call_info); | |
1234 } | |
1235 } else { | |
1236 CompiledStaticCall* ssc = compiledStaticCall_before(caller_frame.pc()); | |
1237 if (ssc->is_clean()) ssc->set(static_call_info); | |
1238 } | |
1239 } | |
1240 | |
1241 } // unlock CompiledIC_lock | |
1242 | |
1243 return callee_method; | |
1244 } | |
1245 | |
1246 | |
1247 // Inline caches exist only in compiled code | |
1248 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_ic_miss(JavaThread* thread)) | |
1249 #ifdef ASSERT | |
1250 RegisterMap reg_map(thread, false); | |
1251 frame stub_frame = thread->last_frame(); | |
1252 assert(stub_frame.is_runtime_frame(), "sanity check"); | |
1253 frame caller_frame = stub_frame.sender(®_map); | |
1254 assert(!caller_frame.is_interpreted_frame() && !caller_frame.is_entry_frame(), "unexpected frame"); | |
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1255 assert(!caller_frame.is_ricochet_frame(), "unexpected frame"); |
0 | 1256 #endif /* ASSERT */ |
1257 | |
1258 methodHandle callee_method; | |
1259 JRT_BLOCK | |
1260 callee_method = SharedRuntime::handle_ic_miss_helper(thread, CHECK_NULL); | |
1261 // Return methodOop through TLS | |
1262 thread->set_vm_result(callee_method()); | |
1263 JRT_BLOCK_END | |
1264 // return compiled code entry point after potential safepoints | |
1265 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1266 return callee_method->verified_code_entry(); | |
1267 JRT_END | |
1268 | |
1269 | |
1270 // Handle call site that has been made non-entrant | |
1271 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method(JavaThread* thread)) | |
1272 // 6243940 We might end up in here if the callee is deoptimized | |
1273 // as we race to call it. We don't want to take a safepoint if | |
1274 // the caller was interpreted because the caller frame will look | |
1275 // interpreted to the stack walkers and arguments are now | |
1276 // "compiled" so it is much better to make this transition | |
1277 // invisible to the stack walking code. The i2c path will | |
1278 // place the callee method in the callee_target. It is stashed | |
1279 // there because if we try and find the callee by normal means a | |
1280 // safepoint is possible and have trouble gc'ing the compiled args. | |
1281 RegisterMap reg_map(thread, false); | |
1282 frame stub_frame = thread->last_frame(); | |
1283 assert(stub_frame.is_runtime_frame(), "sanity check"); | |
1284 frame caller_frame = stub_frame.sender(®_map); | |
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1285 |
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1286 // MethodHandle invokes don't have a CompiledIC and should always |
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1287 // simply redispatch to the callee_target. |
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1288 address sender_pc = caller_frame.pc(); |
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1289 CodeBlob* sender_cb = caller_frame.cb(); |
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1290 nmethod* sender_nm = sender_cb->as_nmethod_or_null(); |
1204 | 1291 bool is_mh_invoke_via_adapter = false; // Direct c2c call or via adapter? |
1292 if (sender_nm != NULL && sender_nm->is_method_handle_return(sender_pc)) { | |
1293 // If the callee_target is set, then we have come here via an i2c | |
1294 // adapter. | |
1295 methodOop callee = thread->callee_target(); | |
1296 if (callee != NULL) { | |
1297 assert(callee->is_method(), "sanity"); | |
1298 is_mh_invoke_via_adapter = true; | |
1299 } | |
1300 } | |
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1301 |
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1302 if (caller_frame.is_interpreted_frame() || |
1204 | 1303 caller_frame.is_entry_frame() || |
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1304 caller_frame.is_ricochet_frame() || |
1204 | 1305 is_mh_invoke_via_adapter) { |
0 | 1306 methodOop callee = thread->callee_target(); |
1307 guarantee(callee != NULL && callee->is_method(), "bad handshake"); | |
1308 thread->set_vm_result(callee); | |
1309 thread->set_callee_target(NULL); | |
1310 return callee->get_c2i_entry(); | |
1311 } | |
1312 | |
1313 // Must be compiled to compiled path which is safe to stackwalk | |
1314 methodHandle callee_method; | |
1315 JRT_BLOCK | |
1316 // Force resolving of caller (if we called from compiled frame) | |
1317 callee_method = SharedRuntime::reresolve_call_site(thread, CHECK_NULL); | |
1318 thread->set_vm_result(callee_method()); | |
1319 JRT_BLOCK_END | |
1320 // return compiled code entry point after potential safepoints | |
1321 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1322 return callee_method->verified_code_entry(); | |
1323 JRT_END | |
1324 | |
1325 | |
1326 // resolve a static call and patch code | |
1327 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_static_call_C(JavaThread *thread )) | |
1328 methodHandle callee_method; | |
1329 JRT_BLOCK | |
1330 callee_method = SharedRuntime::resolve_helper(thread, false, false, CHECK_NULL); | |
1331 thread->set_vm_result(callee_method()); | |
1332 JRT_BLOCK_END | |
1333 // return compiled code entry point after potential safepoints | |
1334 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1335 return callee_method->verified_code_entry(); | |
1336 JRT_END | |
1337 | |
1338 | |
1339 // resolve virtual call and update inline cache to monomorphic | |
1340 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_virtual_call_C(JavaThread *thread )) | |
1341 methodHandle callee_method; | |
1342 JRT_BLOCK | |
1343 callee_method = SharedRuntime::resolve_helper(thread, true, false, CHECK_NULL); | |
1344 thread->set_vm_result(callee_method()); | |
1345 JRT_BLOCK_END | |
1346 // return compiled code entry point after potential safepoints | |
1347 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1348 return callee_method->verified_code_entry(); | |
1349 JRT_END | |
1350 | |
1351 | |
1352 // Resolve a virtual call that can be statically bound (e.g., always | |
1353 // monomorphic, so it has no inline cache). Patch code to resolved target. | |
1354 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_opt_virtual_call_C(JavaThread *thread)) | |
1355 methodHandle callee_method; | |
1356 JRT_BLOCK | |
1357 callee_method = SharedRuntime::resolve_helper(thread, true, true, CHECK_NULL); | |
1358 thread->set_vm_result(callee_method()); | |
1359 JRT_BLOCK_END | |
1360 // return compiled code entry point after potential safepoints | |
1361 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1362 return callee_method->verified_code_entry(); | |
1363 JRT_END | |
1364 | |
1365 | |
1366 | |
1367 | |
1368 | |
1369 methodHandle SharedRuntime::handle_ic_miss_helper(JavaThread *thread, TRAPS) { | |
1370 ResourceMark rm(thread); | |
1371 CallInfo call_info; | |
1372 Bytecodes::Code bc; | |
1373 | |
1374 // receiver is NULL for static calls. An exception is thrown for NULL | |
1375 // receivers for non-static calls | |
1376 Handle receiver = find_callee_info(thread, bc, call_info, | |
1377 CHECK_(methodHandle())); | |
1378 // Compiler1 can produce virtual call sites that can actually be statically bound | |
1379 // If we fell thru to below we would think that the site was going megamorphic | |
1380 // when in fact the site can never miss. Worse because we'd think it was megamorphic | |
1381 // we'd try and do a vtable dispatch however methods that can be statically bound | |
1382 // don't have vtable entries (vtable_index < 0) and we'd blow up. So we force a | |
1383 // reresolution of the call site (as if we did a handle_wrong_method and not an | |
1384 // plain ic_miss) and the site will be converted to an optimized virtual call site | |
1385 // never to miss again. I don't believe C2 will produce code like this but if it | |
1386 // did this would still be the correct thing to do for it too, hence no ifdef. | |
1387 // | |
1388 if (call_info.resolved_method()->can_be_statically_bound()) { | |
1389 methodHandle callee_method = SharedRuntime::reresolve_call_site(thread, CHECK_(methodHandle())); | |
1390 if (TraceCallFixup) { | |
1391 RegisterMap reg_map(thread, false); | |
1392 frame caller_frame = thread->last_frame().sender(®_map); | |
1393 ResourceMark rm(thread); | |
1394 tty->print("converting IC miss to reresolve (%s) call to", Bytecodes::name(bc)); | |
1395 callee_method->print_short_name(tty); | |
1396 tty->print_cr(" from pc: " INTPTR_FORMAT, caller_frame.pc()); | |
1397 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1398 } | |
1399 return callee_method; | |
1400 } | |
1401 | |
1402 methodHandle callee_method = call_info.selected_method(); | |
1403 | |
1404 bool should_be_mono = false; | |
1405 | |
1406 #ifndef PRODUCT | |
1407 Atomic::inc(&_ic_miss_ctr); | |
1408 | |
1409 // Statistics & Tracing | |
1410 if (TraceCallFixup) { | |
1411 ResourceMark rm(thread); | |
1412 tty->print("IC miss (%s) call to", Bytecodes::name(bc)); | |
1413 callee_method->print_short_name(tty); | |
1414 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1415 } | |
1416 | |
1417 if (ICMissHistogram) { | |
1418 MutexLocker m(VMStatistic_lock); | |
1419 RegisterMap reg_map(thread, false); | |
1420 frame f = thread->last_frame().real_sender(®_map);// skip runtime stub | |
1421 // produce statistics under the lock | |
1422 trace_ic_miss(f.pc()); | |
1423 } | |
1424 #endif | |
1425 | |
1426 // install an event collector so that when a vtable stub is created the | |
1427 // profiler can be notified via a DYNAMIC_CODE_GENERATED event. The | |
1428 // event can't be posted when the stub is created as locks are held | |
1429 // - instead the event will be deferred until the event collector goes | |
1430 // out of scope. | |
1431 JvmtiDynamicCodeEventCollector event_collector; | |
1432 | |
1433 // Update inline cache to megamorphic. Skip update if caller has been | |
1434 // made non-entrant or we are called from interpreted. | |
1435 { MutexLocker ml_patch (CompiledIC_lock); | |
1436 RegisterMap reg_map(thread, false); | |
1437 frame caller_frame = thread->last_frame().sender(®_map); | |
1438 CodeBlob* cb = caller_frame.cb(); | |
1439 if (cb->is_nmethod() && ((nmethod*)cb)->is_in_use()) { | |
1440 // Not a non-entrant nmethod, so find inline_cache | |
1441 CompiledIC* inline_cache = CompiledIC_before(caller_frame.pc()); | |
1442 bool should_be_mono = false; | |
1443 if (inline_cache->is_optimized()) { | |
1444 if (TraceCallFixup) { | |
1445 ResourceMark rm(thread); | |
1446 tty->print("OPTIMIZED IC miss (%s) call to", Bytecodes::name(bc)); | |
1447 callee_method->print_short_name(tty); | |
1448 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1449 } | |
1450 should_be_mono = true; | |
1451 } else { | |
1452 compiledICHolderOop ic_oop = (compiledICHolderOop) inline_cache->cached_oop(); | |
1453 if ( ic_oop != NULL && ic_oop->is_compiledICHolder()) { | |
1454 | |
1455 if (receiver()->klass() == ic_oop->holder_klass()) { | |
1456 // This isn't a real miss. We must have seen that compiled code | |
1457 // is now available and we want the call site converted to a | |
1458 // monomorphic compiled call site. | |
1459 // We can't assert for callee_method->code() != NULL because it | |
1460 // could have been deoptimized in the meantime | |
1461 if (TraceCallFixup) { | |
1462 ResourceMark rm(thread); | |
1463 tty->print("FALSE IC miss (%s) converting to compiled call to", Bytecodes::name(bc)); | |
1464 callee_method->print_short_name(tty); | |
1465 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1466 } | |
1467 should_be_mono = true; | |
1468 } | |
1469 } | |
1470 } | |
1471 | |
1472 if (should_be_mono) { | |
1473 | |
1474 // We have a path that was monomorphic but was going interpreted | |
1475 // and now we have (or had) a compiled entry. We correct the IC | |
1476 // by using a new icBuffer. | |
1477 CompiledICInfo info; | |
1478 KlassHandle receiver_klass(THREAD, receiver()->klass()); | |
1479 inline_cache->compute_monomorphic_entry(callee_method, | |
1480 receiver_klass, | |
1481 inline_cache->is_optimized(), | |
1482 false, | |
1483 info, CHECK_(methodHandle())); | |
1484 inline_cache->set_to_monomorphic(info); | |
1485 } else if (!inline_cache->is_megamorphic() && !inline_cache->is_clean()) { | |
1486 // Change to megamorphic | |
1487 inline_cache->set_to_megamorphic(&call_info, bc, CHECK_(methodHandle())); | |
1488 } else { | |
1489 // Either clean or megamorphic | |
1490 } | |
1491 } | |
1492 } // Release CompiledIC_lock | |
1493 | |
1494 return callee_method; | |
1495 } | |
1496 | |
1497 // | |
1498 // Resets a call-site in compiled code so it will get resolved again. | |
1499 // This routines handles both virtual call sites, optimized virtual call | |
1500 // sites, and static call sites. Typically used to change a call sites | |
1501 // destination from compiled to interpreted. | |
1502 // | |
1503 methodHandle SharedRuntime::reresolve_call_site(JavaThread *thread, TRAPS) { | |
1504 ResourceMark rm(thread); | |
1505 RegisterMap reg_map(thread, false); | |
1506 frame stub_frame = thread->last_frame(); | |
1507 assert(stub_frame.is_runtime_frame(), "must be a runtimeStub"); | |
1508 frame caller = stub_frame.sender(®_map); | |
1509 | |
1510 // Do nothing if the frame isn't a live compiled frame. | |
1511 // nmethod could be deoptimized by the time we get here | |
1512 // so no update to the caller is needed. | |
1513 | |
1514 if (caller.is_compiled_frame() && !caller.is_deoptimized_frame()) { | |
1515 | |
1516 address pc = caller.pc(); | |
1517 Events::log("update call-site at pc " INTPTR_FORMAT, pc); | |
1518 | |
1519 // Default call_addr is the location of the "basic" call. | |
1520 // Determine the address of the call we a reresolving. With | |
1521 // Inline Caches we will always find a recognizable call. | |
1522 // With Inline Caches disabled we may or may not find a | |
1523 // recognizable call. We will always find a call for static | |
1524 // calls and for optimized virtual calls. For vanilla virtual | |
1525 // calls it depends on the state of the UseInlineCaches switch. | |
1526 // | |
1527 // With Inline Caches disabled we can get here for a virtual call | |
1528 // for two reasons: | |
1529 // 1 - calling an abstract method. The vtable for abstract methods | |
1530 // will run us thru handle_wrong_method and we will eventually | |
1531 // end up in the interpreter to throw the ame. | |
1532 // 2 - a racing deoptimization. We could be doing a vanilla vtable | |
1533 // call and between the time we fetch the entry address and | |
1534 // we jump to it the target gets deoptimized. Similar to 1 | |
1535 // we will wind up in the interprter (thru a c2i with c2). | |
1536 // | |
1537 address call_addr = NULL; | |
1538 { | |
1539 // Get call instruction under lock because another thread may be | |
1540 // busy patching it. | |
1541 MutexLockerEx ml_patch(Patching_lock, Mutex::_no_safepoint_check_flag); | |
1542 // Location of call instruction | |
1543 if (NativeCall::is_call_before(pc)) { | |
1544 NativeCall *ncall = nativeCall_before(pc); | |
1545 call_addr = ncall->instruction_address(); | |
1546 } | |
1547 } | |
1548 | |
1549 // Check for static or virtual call | |
1550 bool is_static_call = false; | |
1551 nmethod* caller_nm = CodeCache::find_nmethod(pc); | |
1552 // Make sure nmethod doesn't get deoptimized and removed until | |
1553 // this is done with it. | |
1554 // CLEANUP - with lazy deopt shouldn't need this lock | |
1555 nmethodLocker nmlock(caller_nm); | |
1556 | |
1557 if (call_addr != NULL) { | |
1558 RelocIterator iter(caller_nm, call_addr, call_addr+1); | |
1559 int ret = iter.next(); // Get item | |
1560 if (ret) { | |
1561 assert(iter.addr() == call_addr, "must find call"); | |
1562 if (iter.type() == relocInfo::static_call_type) { | |
1563 is_static_call = true; | |
1564 } else { | |
1565 assert(iter.type() == relocInfo::virtual_call_type || | |
1566 iter.type() == relocInfo::opt_virtual_call_type | |
1567 , "unexpected relocInfo. type"); | |
1568 } | |
1569 } else { | |
1570 assert(!UseInlineCaches, "relocation info. must exist for this address"); | |
1571 } | |
1572 | |
1573 // Cleaning the inline cache will force a new resolve. This is more robust | |
1574 // than directly setting it to the new destination, since resolving of calls | |
1575 // is always done through the same code path. (experience shows that it | |
1576 // leads to very hard to track down bugs, if an inline cache gets updated | |
1577 // to a wrong method). It should not be performance critical, since the | |
1578 // resolve is only done once. | |
1579 | |
1580 MutexLocker ml(CompiledIC_lock); | |
1581 // | |
1582 // We do not patch the call site if the nmethod has been made non-entrant | |
1583 // as it is a waste of time | |
1584 // | |
1585 if (caller_nm->is_in_use()) { | |
1586 if (is_static_call) { | |
1587 CompiledStaticCall* ssc= compiledStaticCall_at(call_addr); | |
1588 ssc->set_to_clean(); | |
1589 } else { | |
1590 // compiled, dispatched call (which used to call an interpreted method) | |
1591 CompiledIC* inline_cache = CompiledIC_at(call_addr); | |
1592 inline_cache->set_to_clean(); | |
1593 } | |
1594 } | |
1595 } | |
1596 | |
1597 } | |
1598 | |
1599 methodHandle callee_method = find_callee_method(thread, CHECK_(methodHandle())); | |
1600 | |
1601 | |
1602 #ifndef PRODUCT | |
1603 Atomic::inc(&_wrong_method_ctr); | |
1604 | |
1605 if (TraceCallFixup) { | |
1606 ResourceMark rm(thread); | |
1607 tty->print("handle_wrong_method reresolving call to"); | |
1608 callee_method->print_short_name(tty); | |
1609 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1610 } | |
1611 #endif | |
1612 | |
1613 return callee_method; | |
1614 } | |
1615 | |
1616 // --------------------------------------------------------------------------- | |
1617 // We are calling the interpreter via a c2i. Normally this would mean that | |
1618 // we were called by a compiled method. However we could have lost a race | |
1619 // where we went int -> i2c -> c2i and so the caller could in fact be | |
1205 | 1620 // interpreted. If the caller is compiled we attempt to patch the caller |
0 | 1621 // so he no longer calls into the interpreter. |
1622 IRT_LEAF(void, SharedRuntime::fixup_callers_callsite(methodOopDesc* method, address caller_pc)) | |
1623 methodOop moop(method); | |
1624 | |
1625 address entry_point = moop->from_compiled_entry(); | |
1626 | |
1627 // It's possible that deoptimization can occur at a call site which hasn't | |
1628 // been resolved yet, in which case this function will be called from | |
1629 // an nmethod that has been patched for deopt and we can ignore the | |
1630 // request for a fixup. | |
1631 // Also it is possible that we lost a race in that from_compiled_entry | |
1632 // is now back to the i2c in that case we don't need to patch and if | |
1633 // we did we'd leap into space because the callsite needs to use | |
1634 // "to interpreter" stub in order to load up the methodOop. Don't | |
1635 // ask me how I know this... | |
1636 | |
1637 CodeBlob* cb = CodeCache::find_blob(caller_pc); | |
1205 | 1638 if (!cb->is_nmethod() || entry_point == moop->get_c2i_entry()) { |
1639 return; | |
1640 } | |
1641 | |
1642 // The check above makes sure this is a nmethod. | |
1643 nmethod* nm = cb->as_nmethod_or_null(); | |
1644 assert(nm, "must be"); | |
1645 | |
1646 // Don't fixup MethodHandle call sites as c2i/i2c adapters are used | |
1647 // to implement MethodHandle actions. | |
1648 if (nm->is_method_handle_return(caller_pc)) { | |
0 | 1649 return; |
1650 } | |
1651 | |
1652 // There is a benign race here. We could be attempting to patch to a compiled | |
1653 // entry point at the same time the callee is being deoptimized. If that is | |
1654 // the case then entry_point may in fact point to a c2i and we'd patch the | |
1655 // call site with the same old data. clear_code will set code() to NULL | |
1656 // at the end of it. If we happen to see that NULL then we can skip trying | |
1657 // to patch. If we hit the window where the callee has a c2i in the | |
1658 // from_compiled_entry and the NULL isn't present yet then we lose the race | |
1659 // and patch the code with the same old data. Asi es la vida. | |
1660 | |
1661 if (moop->code() == NULL) return; | |
1662 | |
1205 | 1663 if (nm->is_in_use()) { |
0 | 1664 |
1665 // Expect to find a native call there (unless it was no-inline cache vtable dispatch) | |
1666 MutexLockerEx ml_patch(Patching_lock, Mutex::_no_safepoint_check_flag); | |
1667 if (NativeCall::is_call_before(caller_pc + frame::pc_return_offset)) { | |
1668 NativeCall *call = nativeCall_before(caller_pc + frame::pc_return_offset); | |
1669 // | |
1670 // bug 6281185. We might get here after resolving a call site to a vanilla | |
1671 // virtual call. Because the resolvee uses the verified entry it may then | |
1672 // see compiled code and attempt to patch the site by calling us. This would | |
1673 // then incorrectly convert the call site to optimized and its downhill from | |
1674 // there. If you're lucky you'll get the assert in the bugid, if not you've | |
1675 // just made a call site that could be megamorphic into a monomorphic site | |
1676 // for the rest of its life! Just another racing bug in the life of | |
1677 // fixup_callers_callsite ... | |
1678 // | |
1563
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1679 RelocIterator iter(nm, call->instruction_address(), call->next_instruction_address()); |
0 | 1680 iter.next(); |
1681 assert(iter.has_current(), "must have a reloc at java call site"); | |
1682 relocInfo::relocType typ = iter.reloc()->type(); | |
1683 if ( typ != relocInfo::static_call_type && | |
1684 typ != relocInfo::opt_virtual_call_type && | |
1685 typ != relocInfo::static_stub_type) { | |
1686 return; | |
1687 } | |
1688 address destination = call->destination(); | |
1689 if (destination != entry_point) { | |
1690 CodeBlob* callee = CodeCache::find_blob(destination); | |
1691 // callee == cb seems weird. It means calling interpreter thru stub. | |
1692 if (callee == cb || callee->is_adapter_blob()) { | |
1693 // static call or optimized virtual | |
1694 if (TraceCallFixup) { | |
1204 | 1695 tty->print("fixup callsite at " INTPTR_FORMAT " to compiled code for", caller_pc); |
0 | 1696 moop->print_short_name(tty); |
1697 tty->print_cr(" to " INTPTR_FORMAT, entry_point); | |
1698 } | |
1699 call->set_destination_mt_safe(entry_point); | |
1700 } else { | |
1701 if (TraceCallFixup) { | |
1702 tty->print("failed to fixup callsite at " INTPTR_FORMAT " to compiled code for", caller_pc); | |
1703 moop->print_short_name(tty); | |
1704 tty->print_cr(" to " INTPTR_FORMAT, entry_point); | |
1705 } | |
1706 // assert is too strong could also be resolve destinations. | |
1707 // assert(InlineCacheBuffer::contains(destination) || VtableStubs::contains(destination), "must be"); | |
1708 } | |
1709 } else { | |
1710 if (TraceCallFixup) { | |
1204 | 1711 tty->print("already patched callsite at " INTPTR_FORMAT " to compiled code for", caller_pc); |
0 | 1712 moop->print_short_name(tty); |
1713 tty->print_cr(" to " INTPTR_FORMAT, entry_point); | |
1714 } | |
1715 } | |
1716 } | |
1717 } | |
1718 | |
1719 IRT_END | |
1720 | |
1721 | |
1722 // same as JVM_Arraycopy, but called directly from compiled code | |
1723 JRT_ENTRY(void, SharedRuntime::slow_arraycopy_C(oopDesc* src, jint src_pos, | |
1724 oopDesc* dest, jint dest_pos, | |
1725 jint length, | |
1726 JavaThread* thread)) { | |
1727 #ifndef PRODUCT | |
1728 _slow_array_copy_ctr++; | |
1729 #endif | |
1730 // Check if we have null pointers | |
1731 if (src == NULL || dest == NULL) { | |
1732 THROW(vmSymbols::java_lang_NullPointerException()); | |
1733 } | |
1734 // Do the copy. The casts to arrayOop are necessary to the copy_array API, | |
1735 // even though the copy_array API also performs dynamic checks to ensure | |
1736 // that src and dest are truly arrays (and are conformable). | |
1737 // The copy_array mechanism is awkward and could be removed, but | |
1738 // the compilers don't call this function except as a last resort, | |
1739 // so it probably doesn't matter. | |
1740 Klass::cast(src->klass())->copy_array((arrayOopDesc*)src, src_pos, | |
1741 (arrayOopDesc*)dest, dest_pos, | |
1742 length, thread); | |
1743 } | |
1744 JRT_END | |
1745 | |
1746 char* SharedRuntime::generate_class_cast_message( | |
1747 JavaThread* thread, const char* objName) { | |
1748 | |
1749 // Get target class name from the checkcast instruction | |
1750 vframeStream vfst(thread, true); | |
1751 assert(!vfst.at_end(), "Java frame must exist"); | |
2142 | 1752 Bytecode_checkcast cc(vfst.method(), vfst.method()->bcp_from(vfst.bci())); |
0 | 1753 Klass* targetKlass = Klass::cast(vfst.method()->constants()->klass_at( |
2142 | 1754 cc.index(), thread)); |
0 | 1755 return generate_class_cast_message(objName, targetKlass->external_name()); |
1756 } | |
1757 | |
710 | 1758 char* SharedRuntime::generate_wrong_method_type_message(JavaThread* thread, |
1759 oopDesc* required, | |
1760 oopDesc* actual) { | |
1793
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1761 if (TraceMethodHandles) { |
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1762 tty->print_cr("WrongMethodType thread="PTR_FORMAT" req="PTR_FORMAT" act="PTR_FORMAT"", |
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1763 thread, required, actual); |
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1764 } |
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1765 assert(EnableInvokeDynamic, ""); |
710 | 1766 oop singleKlass = wrong_method_type_is_for_single_argument(thread, required); |
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1767 char* message = NULL; |
710 | 1768 if (singleKlass != NULL) { |
1769 const char* objName = "argument or return value"; | |
1770 if (actual != NULL) { | |
1771 // be flexible about the junk passed in: | |
1772 klassOop ak = (actual->is_klass() | |
1773 ? (klassOop)actual | |
1774 : actual->klass()); | |
1775 objName = Klass::cast(ak)->external_name(); | |
1776 } | |
1777 Klass* targetKlass = Klass::cast(required->is_klass() | |
1778 ? (klassOop)required | |
1779 : java_lang_Class::as_klassOop(required)); | |
1793
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1780 message = generate_class_cast_message(objName, targetKlass->external_name()); |
710 | 1781 } else { |
1782 // %%% need to get the MethodType string, without messing around too much | |
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1783 const char* desc = NULL; |
710 | 1784 // Get a signature from the invoke instruction |
1785 const char* mhName = "method handle"; | |
1786 const char* targetType = "the required signature"; | |
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1787 int targetArity = -1, mhArity = -1; |
710 | 1788 vframeStream vfst(thread, true); |
1789 if (!vfst.at_end()) { | |
2142 | 1790 Bytecode_invoke call(vfst.method(), vfst.bci()); |
710 | 1791 methodHandle target; |
1792 { | |
1793 EXCEPTION_MARK; | |
2142 | 1794 target = call.static_target(THREAD); |
710 | 1795 if (HAS_PENDING_EXCEPTION) { CLEAR_PENDING_EXCEPTION; } |
1796 } | |
1797 if (target.not_null() | |
1798 && target->is_method_handle_invoke() | |
1799 && required == target->method_handle_type()) { | |
1800 targetType = target->signature()->as_C_string(); | |
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1801 targetArity = ArgumentCount(target->signature()).size(); |
710 | 1802 } |
1803 } | |
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1804 KlassHandle kignore; int dmf_flags = 0; |
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1805 methodHandle actual_method = MethodHandles::decode_method(actual, kignore, dmf_flags); |
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1806 if ((dmf_flags & ~(MethodHandles::_dmf_has_receiver | |
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1807 MethodHandles::_dmf_does_dispatch | |
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1808 MethodHandles::_dmf_from_interface)) != 0) |
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1809 actual_method = methodHandle(); // MH does extra binds, drops, etc. |
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1810 bool has_receiver = ((dmf_flags & MethodHandles::_dmf_has_receiver) != 0); |
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1811 if (actual_method.not_null()) { |
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1812 mhName = actual_method->signature()->as_C_string(); |
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1813 mhArity = ArgumentCount(actual_method->signature()).size(); |
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1814 if (!actual_method->is_static()) mhArity += 1; |
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1815 } else if (java_lang_invoke_MethodHandle::is_instance(actual)) { |
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1816 oopDesc* mhType = java_lang_invoke_MethodHandle::type(actual); |
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1817 mhArity = java_lang_invoke_MethodType::ptype_count(mhType); |
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1818 stringStream st; |
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1819 java_lang_invoke_MethodType::print_signature(mhType, &st); |
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1820 mhName = st.as_string(); |
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1821 } |
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1822 if (targetArity != -1 && targetArity != mhArity) { |
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1823 if (has_receiver && targetArity == mhArity-1) |
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1824 desc = " cannot be called without a receiver argument as "; |
710 | 1825 else |
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1826 desc = " cannot be called with a different arity as "; |
710 | 1827 } |
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1828 message = generate_class_cast_message(mhName, targetType, |
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1829 desc != NULL ? desc : |
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1830 " cannot be called as "); |
710 | 1831 } |
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1832 if (TraceMethodHandles) { |
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1833 tty->print_cr("WrongMethodType => message=%s", message); |
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1834 } |
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1835 return message; |
710 | 1836 } |
1837 | |
1838 oop SharedRuntime::wrong_method_type_is_for_single_argument(JavaThread* thr, | |
1839 oopDesc* required) { | |
1840 if (required == NULL) return NULL; | |
1142 | 1841 if (required->klass() == SystemDictionary::Class_klass()) |
710 | 1842 return required; |
1843 if (required->is_klass()) | |
1844 return Klass::cast(klassOop(required))->java_mirror(); | |
1845 return NULL; | |
1846 } | |
1847 | |
1848 | |
0 | 1849 char* SharedRuntime::generate_class_cast_message( |
710 | 1850 const char* objName, const char* targetKlassName, const char* desc) { |
0 | 1851 size_t msglen = strlen(objName) + strlen(desc) + strlen(targetKlassName) + 1; |
1852 | |
53 | 1853 char* message = NEW_RESOURCE_ARRAY(char, msglen); |
0 | 1854 if (NULL == message) { |
53 | 1855 // Shouldn't happen, but don't cause even more problems if it does |
0 | 1856 message = const_cast<char*>(objName); |
1857 } else { | |
1858 jio_snprintf(message, msglen, "%s%s%s", objName, desc, targetKlassName); | |
1859 } | |
1860 return message; | |
1861 } | |
1862 | |
1863 JRT_LEAF(void, SharedRuntime::reguard_yellow_pages()) | |
1864 (void) JavaThread::current()->reguard_stack(); | |
1865 JRT_END | |
1866 | |
1867 | |
1868 // Handles the uncommon case in locking, i.e., contention or an inflated lock. | |
1869 #ifndef PRODUCT | |
1870 int SharedRuntime::_monitor_enter_ctr=0; | |
1871 #endif | |
1872 JRT_ENTRY_NO_ASYNC(void, SharedRuntime::complete_monitor_locking_C(oopDesc* _obj, BasicLock* lock, JavaThread* thread)) | |
1873 oop obj(_obj); | |
1874 #ifndef PRODUCT | |
1875 _monitor_enter_ctr++; // monitor enter slow | |
1876 #endif | |
1877 if (PrintBiasedLockingStatistics) { | |
1878 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); | |
1879 } | |
1880 Handle h_obj(THREAD, obj); | |
1881 if (UseBiasedLocking) { | |
1882 // Retry fast entry if bias is revoked to avoid unnecessary inflation | |
1883 ObjectSynchronizer::fast_enter(h_obj, lock, true, CHECK); | |
1884 } else { | |
1885 ObjectSynchronizer::slow_enter(h_obj, lock, CHECK); | |
1886 } | |
1887 assert(!HAS_PENDING_EXCEPTION, "Should have no exception here"); | |
1888 JRT_END | |
1889 | |
1890 #ifndef PRODUCT | |
1891 int SharedRuntime::_monitor_exit_ctr=0; | |
1892 #endif | |
1893 // Handles the uncommon cases of monitor unlocking in compiled code | |
1894 JRT_LEAF(void, SharedRuntime::complete_monitor_unlocking_C(oopDesc* _obj, BasicLock* lock)) | |
1895 oop obj(_obj); | |
1896 #ifndef PRODUCT | |
1897 _monitor_exit_ctr++; // monitor exit slow | |
1898 #endif | |
1899 Thread* THREAD = JavaThread::current(); | |
1900 // I'm not convinced we need the code contained by MIGHT_HAVE_PENDING anymore | |
1901 // testing was unable to ever fire the assert that guarded it so I have removed it. | |
1902 assert(!HAS_PENDING_EXCEPTION, "Do we need code below anymore?"); | |
1903 #undef MIGHT_HAVE_PENDING | |
1904 #ifdef MIGHT_HAVE_PENDING | |
1905 // Save and restore any pending_exception around the exception mark. | |
1906 // While the slow_exit must not throw an exception, we could come into | |
1907 // this routine with one set. | |
1908 oop pending_excep = NULL; | |
1909 const char* pending_file; | |
1910 int pending_line; | |
1911 if (HAS_PENDING_EXCEPTION) { | |
1912 pending_excep = PENDING_EXCEPTION; | |
1913 pending_file = THREAD->exception_file(); | |
1914 pending_line = THREAD->exception_line(); | |
1915 CLEAR_PENDING_EXCEPTION; | |
1916 } | |
1917 #endif /* MIGHT_HAVE_PENDING */ | |
1918 | |
1919 { | |
1920 // Exit must be non-blocking, and therefore no exceptions can be thrown. | |
1921 EXCEPTION_MARK; | |
1922 ObjectSynchronizer::slow_exit(obj, lock, THREAD); | |
1923 } | |
1924 | |
1925 #ifdef MIGHT_HAVE_PENDING | |
1926 if (pending_excep != NULL) { | |
1927 THREAD->set_pending_exception(pending_excep, pending_file, pending_line); | |
1928 } | |
1929 #endif /* MIGHT_HAVE_PENDING */ | |
1930 JRT_END | |
1931 | |
1932 #ifndef PRODUCT | |
1933 | |
1934 void SharedRuntime::print_statistics() { | |
1935 ttyLocker ttyl; | |
1936 if (xtty != NULL) xtty->head("statistics type='SharedRuntime'"); | |
1937 | |
1938 if (_monitor_enter_ctr ) tty->print_cr("%5d monitor enter slow", _monitor_enter_ctr); | |
1939 if (_monitor_exit_ctr ) tty->print_cr("%5d monitor exit slow", _monitor_exit_ctr); | |
1940 if (_throw_null_ctr) tty->print_cr("%5d implicit null throw", _throw_null_ctr); | |
1941 | |
1942 SharedRuntime::print_ic_miss_histogram(); | |
1943 | |
1944 if (CountRemovableExceptions) { | |
1945 if (_nof_removable_exceptions > 0) { | |
1946 Unimplemented(); // this counter is not yet incremented | |
1947 tty->print_cr("Removable exceptions: %d", _nof_removable_exceptions); | |
1948 } | |
1949 } | |
1950 | |
1951 // Dump the JRT_ENTRY counters | |
1952 if( _new_instance_ctr ) tty->print_cr("%5d new instance requires GC", _new_instance_ctr); | |
1953 if( _new_array_ctr ) tty->print_cr("%5d new array requires GC", _new_array_ctr); | |
1954 if( _multi1_ctr ) tty->print_cr("%5d multianewarray 1 dim", _multi1_ctr); | |
1955 if( _multi2_ctr ) tty->print_cr("%5d multianewarray 2 dim", _multi2_ctr); | |
1956 if( _multi3_ctr ) tty->print_cr("%5d multianewarray 3 dim", _multi3_ctr); | |
1957 if( _multi4_ctr ) tty->print_cr("%5d multianewarray 4 dim", _multi4_ctr); | |
1958 if( _multi5_ctr ) tty->print_cr("%5d multianewarray 5 dim", _multi5_ctr); | |
1959 | |
1960 tty->print_cr("%5d inline cache miss in compiled", _ic_miss_ctr ); | |
1961 tty->print_cr("%5d wrong method", _wrong_method_ctr ); | |
1962 tty->print_cr("%5d unresolved static call site", _resolve_static_ctr ); | |
1963 tty->print_cr("%5d unresolved virtual call site", _resolve_virtual_ctr ); | |
1964 tty->print_cr("%5d unresolved opt virtual call site", _resolve_opt_virtual_ctr ); | |
1965 | |
1966 if( _mon_enter_stub_ctr ) tty->print_cr("%5d monitor enter stub", _mon_enter_stub_ctr ); | |
1967 if( _mon_exit_stub_ctr ) tty->print_cr("%5d monitor exit stub", _mon_exit_stub_ctr ); | |
1968 if( _mon_enter_ctr ) tty->print_cr("%5d monitor enter slow", _mon_enter_ctr ); | |
1969 if( _mon_exit_ctr ) tty->print_cr("%5d monitor exit slow", _mon_exit_ctr ); | |
1970 if( _partial_subtype_ctr) tty->print_cr("%5d slow partial subtype", _partial_subtype_ctr ); | |
1971 if( _jbyte_array_copy_ctr ) tty->print_cr("%5d byte array copies", _jbyte_array_copy_ctr ); | |
1972 if( _jshort_array_copy_ctr ) tty->print_cr("%5d short array copies", _jshort_array_copy_ctr ); | |
1973 if( _jint_array_copy_ctr ) tty->print_cr("%5d int array copies", _jint_array_copy_ctr ); | |
1974 if( _jlong_array_copy_ctr ) tty->print_cr("%5d long array copies", _jlong_array_copy_ctr ); | |
1975 if( _oop_array_copy_ctr ) tty->print_cr("%5d oop array copies", _oop_array_copy_ctr ); | |
1976 if( _checkcast_array_copy_ctr ) tty->print_cr("%5d checkcast array copies", _checkcast_array_copy_ctr ); | |
1977 if( _unsafe_array_copy_ctr ) tty->print_cr("%5d unsafe array copies", _unsafe_array_copy_ctr ); | |
1978 if( _generic_array_copy_ctr ) tty->print_cr("%5d generic array copies", _generic_array_copy_ctr ); | |
1979 if( _slow_array_copy_ctr ) tty->print_cr("%5d slow array copies", _slow_array_copy_ctr ); | |
1980 if( _find_handler_ctr ) tty->print_cr("%5d find exception handler", _find_handler_ctr ); | |
1981 if( _rethrow_ctr ) tty->print_cr("%5d rethrow handler", _rethrow_ctr ); | |
1982 | |
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1983 AdapterHandlerLibrary::print_statistics(); |
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1984 |
0 | 1985 if (xtty != NULL) xtty->tail("statistics"); |
1986 } | |
1987 | |
1988 inline double percent(int x, int y) { | |
1989 return 100.0 * x / MAX2(y, 1); | |
1990 } | |
1991 | |
1992 class MethodArityHistogram { | |
1993 public: | |
1994 enum { MAX_ARITY = 256 }; | |
1995 private: | |
1996 static int _arity_histogram[MAX_ARITY]; // histogram of #args | |
1997 static int _size_histogram[MAX_ARITY]; // histogram of arg size in words | |
1998 static int _max_arity; // max. arity seen | |
1999 static int _max_size; // max. arg size seen | |
2000 | |
2001 static void add_method_to_histogram(nmethod* nm) { | |
2002 methodOop m = nm->method(); | |
2003 ArgumentCount args(m->signature()); | |
2004 int arity = args.size() + (m->is_static() ? 0 : 1); | |
2005 int argsize = m->size_of_parameters(); | |
2006 arity = MIN2(arity, MAX_ARITY-1); | |
2007 argsize = MIN2(argsize, MAX_ARITY-1); | |
2008 int count = nm->method()->compiled_invocation_count(); | |
2009 _arity_histogram[arity] += count; | |
2010 _size_histogram[argsize] += count; | |
2011 _max_arity = MAX2(_max_arity, arity); | |
2012 _max_size = MAX2(_max_size, argsize); | |
2013 } | |
2014 | |
2015 void print_histogram_helper(int n, int* histo, const char* name) { | |
2016 const int N = MIN2(5, n); | |
2017 tty->print_cr("\nHistogram of call arity (incl. rcvr, calls to compiled methods only):"); | |
2018 double sum = 0; | |
2019 double weighted_sum = 0; | |
2020 int i; | |
2021 for (i = 0; i <= n; i++) { sum += histo[i]; weighted_sum += i*histo[i]; } | |
2022 double rest = sum; | |
2023 double percent = sum / 100; | |
2024 for (i = 0; i <= N; i++) { | |
2025 rest -= histo[i]; | |
2026 tty->print_cr("%4d: %7d (%5.1f%%)", i, histo[i], histo[i] / percent); | |
2027 } | |
2028 tty->print_cr("rest: %7d (%5.1f%%))", (int)rest, rest / percent); | |
2029 tty->print_cr("(avg. %s = %3.1f, max = %d)", name, weighted_sum / sum, n); | |
2030 } | |
2031 | |
2032 void print_histogram() { | |
2033 tty->print_cr("\nHistogram of call arity (incl. rcvr, calls to compiled methods only):"); | |
2034 print_histogram_helper(_max_arity, _arity_histogram, "arity"); | |
2035 tty->print_cr("\nSame for parameter size (in words):"); | |
2036 print_histogram_helper(_max_size, _size_histogram, "size"); | |
2037 tty->cr(); | |
2038 } | |
2039 | |
2040 public: | |
2041 MethodArityHistogram() { | |
2042 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
2043 _max_arity = _max_size = 0; | |
2044 for (int i = 0; i < MAX_ARITY; i++) _arity_histogram[i] = _size_histogram [i] = 0; | |
2045 CodeCache::nmethods_do(add_method_to_histogram); | |
2046 print_histogram(); | |
2047 } | |
2048 }; | |
2049 | |
2050 int MethodArityHistogram::_arity_histogram[MethodArityHistogram::MAX_ARITY]; | |
2051 int MethodArityHistogram::_size_histogram[MethodArityHistogram::MAX_ARITY]; | |
2052 int MethodArityHistogram::_max_arity; | |
2053 int MethodArityHistogram::_max_size; | |
2054 | |
2055 void SharedRuntime::print_call_statistics(int comp_total) { | |
2056 tty->print_cr("Calls from compiled code:"); | |
2057 int total = _nof_normal_calls + _nof_interface_calls + _nof_static_calls; | |
2058 int mono_c = _nof_normal_calls - _nof_optimized_calls - _nof_megamorphic_calls; | |
2059 int mono_i = _nof_interface_calls - _nof_optimized_interface_calls - _nof_megamorphic_interface_calls; | |
2060 tty->print_cr("\t%9d (%4.1f%%) total non-inlined ", total, percent(total, total)); | |
2061 tty->print_cr("\t%9d (%4.1f%%) virtual calls ", _nof_normal_calls, percent(_nof_normal_calls, total)); | |
2062 tty->print_cr("\t %9d (%3.0f%%) inlined ", _nof_inlined_calls, percent(_nof_inlined_calls, _nof_normal_calls)); | |
2063 tty->print_cr("\t %9d (%3.0f%%) optimized ", _nof_optimized_calls, percent(_nof_optimized_calls, _nof_normal_calls)); | |
2064 tty->print_cr("\t %9d (%3.0f%%) monomorphic ", mono_c, percent(mono_c, _nof_normal_calls)); | |
2065 tty->print_cr("\t %9d (%3.0f%%) megamorphic ", _nof_megamorphic_calls, percent(_nof_megamorphic_calls, _nof_normal_calls)); | |
2066 tty->print_cr("\t%9d (%4.1f%%) interface calls ", _nof_interface_calls, percent(_nof_interface_calls, total)); | |
2067 tty->print_cr("\t %9d (%3.0f%%) inlined ", _nof_inlined_interface_calls, percent(_nof_inlined_interface_calls, _nof_interface_calls)); | |
2068 tty->print_cr("\t %9d (%3.0f%%) optimized ", _nof_optimized_interface_calls, percent(_nof_optimized_interface_calls, _nof_interface_calls)); | |
2069 tty->print_cr("\t %9d (%3.0f%%) monomorphic ", mono_i, percent(mono_i, _nof_interface_calls)); | |
2070 tty->print_cr("\t %9d (%3.0f%%) megamorphic ", _nof_megamorphic_interface_calls, percent(_nof_megamorphic_interface_calls, _nof_interface_calls)); | |
2071 tty->print_cr("\t%9d (%4.1f%%) static/special calls", _nof_static_calls, percent(_nof_static_calls, total)); | |
2072 tty->print_cr("\t %9d (%3.0f%%) inlined ", _nof_inlined_static_calls, percent(_nof_inlined_static_calls, _nof_static_calls)); | |
2073 tty->cr(); | |
2074 tty->print_cr("Note 1: counter updates are not MT-safe."); | |
2075 tty->print_cr("Note 2: %% in major categories are relative to total non-inlined calls;"); | |
2076 tty->print_cr(" %% in nested categories are relative to their category"); | |
2077 tty->print_cr(" (and thus add up to more than 100%% with inlining)"); | |
2078 tty->cr(); | |
2079 | |
2080 MethodArityHistogram h; | |
2081 } | |
2082 #endif | |
2083 | |
2084 | |
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2085 // A simple wrapper class around the calling convention information |
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2086 // that allows sharing of adapters for the same calling convention. |
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2087 class AdapterFingerPrint : public CHeapObj { |
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2088 private: |
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2089 union { |
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2090 int _compact[3]; |
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2091 int* _fingerprint; |
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2092 } _value; |
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2093 int _length; // A negative length indicates the fingerprint is in the compact form, |
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2094 // Otherwise _value._fingerprint is the array. |
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2095 |
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2096 // Remap BasicTypes that are handled equivalently by the adapters. |
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2097 // These are correct for the current system but someday it might be |
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2098 // necessary to make this mapping platform dependent. |
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2099 static BasicType adapter_encoding(BasicType in) { |
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2100 assert((~0xf & in) == 0, "must fit in 4 bits"); |
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2101 switch(in) { |
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2102 case T_BOOLEAN: |
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2103 case T_BYTE: |
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2104 case T_SHORT: |
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2105 case T_CHAR: |
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2106 // There are all promoted to T_INT in the calling convention |
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2107 return T_INT; |
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2108 |
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2109 case T_OBJECT: |
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2110 case T_ARRAY: |
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2111 #ifdef _LP64 |
1506 | 2112 return T_LONG; |
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2113 #else |
1506 | 2114 return T_INT; |
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2115 #endif |
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2116 |
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2117 case T_INT: |
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2118 case T_LONG: |
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2119 case T_FLOAT: |
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2120 case T_DOUBLE: |
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2121 case T_VOID: |
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2122 return in; |
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2123 |
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2124 default: |
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2125 ShouldNotReachHere(); |
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2126 return T_CONFLICT; |
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2127 } |
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2128 } |
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2129 |
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2130 public: |
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2131 AdapterFingerPrint(int total_args_passed, BasicType* sig_bt) { |
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2132 // The fingerprint is based on the BasicType signature encoded |
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2133 // into an array of ints with four entries per int. |
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2134 int* ptr; |
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2135 int len = (total_args_passed + 3) >> 2; |
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2136 if (len <= (int)(sizeof(_value._compact) / sizeof(int))) { |
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2137 _value._compact[0] = _value._compact[1] = _value._compact[2] = 0; |
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2138 // Storing the signature encoded as signed chars hits about 98% |
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2139 // of the time. |
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2140 _length = -len; |
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2141 ptr = _value._compact; |
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2142 } else { |
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2143 _length = len; |
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2144 _value._fingerprint = NEW_C_HEAP_ARRAY(int, _length); |
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diff
changeset
|
2145 ptr = _value._fingerprint; |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
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parents:
1205
diff
changeset
|
2146 } |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
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parents:
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diff
changeset
|
2147 |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
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parents:
1205
diff
changeset
|
2148 // Now pack the BasicTypes with 4 per int |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
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parents:
1205
diff
changeset
|
2149 int sig_index = 0; |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
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parents:
1205
diff
changeset
|
2150 for (int index = 0; index < len; index++) { |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
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parents:
1205
diff
changeset
|
2151 int value = 0; |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
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parents:
1205
diff
changeset
|
2152 for (int byte = 0; byte < 4; byte++) { |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
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parents:
1205
diff
changeset
|
2153 if (sig_index < total_args_passed) { |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2154 value = (value << 4) | adapter_encoding(sig_bt[sig_index++]); |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
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parents:
1205
diff
changeset
|
2155 } |
74c848d437ab
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parents:
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diff
changeset
|
2156 } |
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6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2157 ptr[index] = value; |
74c848d437ab
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parents:
1205
diff
changeset
|
2158 } |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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1142
diff
changeset
|
2159 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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parents:
1142
diff
changeset
|
2160 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2161 ~AdapterFingerPrint() { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2162 if (_length > 0) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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parents:
1142
diff
changeset
|
2163 FREE_C_HEAP_ARRAY(int, _value._fingerprint); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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diff
changeset
|
2164 } |
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parents:
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diff
changeset
|
2165 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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parents:
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diff
changeset
|
2166 |
1207
74c848d437ab
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diff
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|
2167 int value(int index) { |
1187
cf0685d550f1
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parents:
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diff
changeset
|
2168 if (_length < 0) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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diff
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|
2169 return _value._compact[index]; |
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diff
changeset
|
2170 } |
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diff
changeset
|
2171 return _value._fingerprint[index]; |
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diff
changeset
|
2172 } |
cf0685d550f1
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diff
changeset
|
2173 int length() { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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diff
changeset
|
2174 if (_length < 0) return -_length; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2175 return _length; |
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parents:
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diff
changeset
|
2176 } |
cf0685d550f1
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diff
changeset
|
2177 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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diff
changeset
|
2178 bool is_compact() { |
cf0685d550f1
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diff
changeset
|
2179 return _length <= 0; |
cf0685d550f1
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diff
changeset
|
2180 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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parents:
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diff
changeset
|
2181 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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diff
changeset
|
2182 unsigned int compute_hash() { |
1207
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
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diff
changeset
|
2183 int hash = 0; |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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diff
changeset
|
2184 for (int i = 0; i < length(); i++) { |
1207
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
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1205
diff
changeset
|
2185 int v = value(i); |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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1142
diff
changeset
|
2186 hash = (hash << 8) ^ v ^ (hash >> 5); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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diff
changeset
|
2187 } |
cf0685d550f1
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parents:
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diff
changeset
|
2188 return (unsigned int)hash; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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parents:
1142
diff
changeset
|
2189 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2190 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2191 const char* as_string() { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2192 stringStream st; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
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diff
changeset
|
2193 for (int i = 0; i < length(); i++) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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parents:
1142
diff
changeset
|
2194 st.print(PTR_FORMAT, value(i)); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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diff
changeset
|
2195 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2196 return st.as_string(); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2197 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2198 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
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diff
changeset
|
2199 bool equals(AdapterFingerPrint* other) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2200 if (other->_length != _length) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2201 return false; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2202 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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parents:
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diff
changeset
|
2203 if (_length < 0) { |
1207
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
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diff
changeset
|
2204 return _value._compact[0] == other->_value._compact[0] && |
74c848d437ab
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diff
changeset
|
2205 _value._compact[1] == other->_value._compact[1] && |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
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parents:
1205
diff
changeset
|
2206 _value._compact[2] == other->_value._compact[2]; |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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1142
diff
changeset
|
2207 } else { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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parents:
1142
diff
changeset
|
2208 for (int i = 0; i < _length; i++) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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diff
changeset
|
2209 if (_value._fingerprint[i] != other->_value._fingerprint[i]) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2210 return false; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2211 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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parents:
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diff
changeset
|
2212 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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parents:
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diff
changeset
|
2213 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2214 return true; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2215 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2216 }; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2217 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2218 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
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diff
changeset
|
2219 // A hashtable mapping from AdapterFingerPrints to AdapterHandlerEntries |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
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1142
diff
changeset
|
2220 class AdapterHandlerTable : public BasicHashtable { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2221 friend class AdapterHandlerTableIterator; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2222 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2223 private: |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2224 |
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
parents:
1257
diff
changeset
|
2225 #ifndef PRODUCT |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2226 static int _lookups; // number of calls to lookup |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2227 static int _buckets; // number of buckets checked |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
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diff
changeset
|
2228 static int _equals; // number of buckets checked with matching hash |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
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1142
diff
changeset
|
2229 static int _hits; // number of successful lookups |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2230 static int _compact; // number of equals calls with compact signature |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2231 #endif |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2232 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2233 AdapterHandlerEntry* bucket(int i) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2234 return (AdapterHandlerEntry*)BasicHashtable::bucket(i); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2235 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2236 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2237 public: |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2238 AdapterHandlerTable() |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2239 : BasicHashtable(293, sizeof(AdapterHandlerEntry)) { } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2240 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2241 // Create a new entry suitable for insertion in the table |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2242 AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_unverified_entry) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2243 AdapterHandlerEntry* entry = (AdapterHandlerEntry*)BasicHashtable::new_entry(fingerprint->compute_hash()); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2244 entry->init(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2245 return entry; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2246 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2247 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2248 // Insert an entry into the table |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2249 void add(AdapterHandlerEntry* entry) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2250 int index = hash_to_index(entry->hash()); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2251 add_entry(index, entry); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2252 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2253 |
1207
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
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diff
changeset
|
2254 void free_entry(AdapterHandlerEntry* entry) { |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
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parents:
1205
diff
changeset
|
2255 entry->deallocate(); |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2256 BasicHashtable::free_entry(entry); |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2257 } |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2258 |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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diff
changeset
|
2259 // Find a entry with the same fingerprint if it exists |
1207
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
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1205
diff
changeset
|
2260 AdapterHandlerEntry* lookup(int total_args_passed, BasicType* sig_bt) { |
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
parents:
1257
diff
changeset
|
2261 NOT_PRODUCT(_lookups++); |
1207
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2262 AdapterFingerPrint fp(total_args_passed, sig_bt); |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2263 unsigned int hash = fp.compute_hash(); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2264 int index = hash_to_index(hash); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2265 for (AdapterHandlerEntry* e = bucket(index); e != NULL; e = e->next()) { |
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
parents:
1257
diff
changeset
|
2266 NOT_PRODUCT(_buckets++); |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2267 if (e->hash() == hash) { |
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
parents:
1257
diff
changeset
|
2268 NOT_PRODUCT(_equals++); |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2269 if (fp.equals(e->fingerprint())) { |
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
parents:
1257
diff
changeset
|
2270 #ifndef PRODUCT |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2271 if (fp.is_compact()) _compact++; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2272 _hits++; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2273 #endif |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2274 return e; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2275 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2276 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2277 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2278 return NULL; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2279 } |
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2280 |
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2281 #ifndef PRODUCT |
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2282 void print_statistics() { |
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2283 ResourceMark rm; |
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2284 int longest = 0; |
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2285 int empty = 0; |
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2286 int total = 0; |
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2287 int nonempty = 0; |
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2288 for (int index = 0; index < table_size(); index++) { |
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2289 int count = 0; |
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2290 for (AdapterHandlerEntry* e = bucket(index); e != NULL; e = e->next()) { |
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2291 count++; |
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2292 } |
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2293 if (count != 0) nonempty++; |
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2294 if (count == 0) empty++; |
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2295 if (count > longest) longest = count; |
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2296 total += count; |
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2297 } |
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2298 tty->print_cr("AdapterHandlerTable: empty %d longest %d total %d average %f", |
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2299 empty, longest, total, total / (double)nonempty); |
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2300 tty->print_cr("AdapterHandlerTable: lookups %d buckets %d equals %d hits %d compact %d", |
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2301 _lookups, _buckets, _equals, _hits, _compact); |
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2302 } |
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2303 #endif |
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2304 }; |
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2305 |
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2306 |
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2307 #ifndef PRODUCT |
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2308 |
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2309 int AdapterHandlerTable::_lookups; |
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2310 int AdapterHandlerTable::_buckets; |
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2311 int AdapterHandlerTable::_equals; |
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2312 int AdapterHandlerTable::_hits; |
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2313 int AdapterHandlerTable::_compact; |
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2314 |
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2315 #endif |
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2316 |
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2317 class AdapterHandlerTableIterator : public StackObj { |
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2318 private: |
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2319 AdapterHandlerTable* _table; |
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2320 int _index; |
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2321 AdapterHandlerEntry* _current; |
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2322 |
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2323 void scan() { |
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2324 while (_index < _table->table_size()) { |
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2325 AdapterHandlerEntry* a = _table->bucket(_index); |
1564 | 2326 _index++; |
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2327 if (a != NULL) { |
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2328 _current = a; |
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2329 return; |
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2330 } |
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2331 } |
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2332 } |
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2333 |
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2334 public: |
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2335 AdapterHandlerTableIterator(AdapterHandlerTable* table): _table(table), _index(0), _current(NULL) { |
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2336 scan(); |
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2337 } |
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2338 bool has_next() { |
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2339 return _current != NULL; |
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2340 } |
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2341 AdapterHandlerEntry* next() { |
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2342 if (_current != NULL) { |
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2343 AdapterHandlerEntry* result = _current; |
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2344 _current = _current->next(); |
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2345 if (_current == NULL) scan(); |
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2346 return result; |
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2347 } else { |
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2348 return NULL; |
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2349 } |
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2350 } |
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2351 }; |
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2352 |
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2353 |
0 | 2354 // --------------------------------------------------------------------------- |
2355 // Implementation of AdapterHandlerLibrary | |
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2356 AdapterHandlerTable* AdapterHandlerLibrary::_adapters = NULL; |
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2357 AdapterHandlerEntry* AdapterHandlerLibrary::_abstract_method_handler = NULL; |
0 | 2358 const int AdapterHandlerLibrary_size = 16*K; |
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2359 BufferBlob* AdapterHandlerLibrary::_buffer = NULL; |
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2360 |
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2361 BufferBlob* AdapterHandlerLibrary::buffer_blob() { |
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2362 // Should be called only when AdapterHandlerLibrary_lock is active. |
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2363 if (_buffer == NULL) // Initialize lazily |
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2364 _buffer = BufferBlob::create("adapters", AdapterHandlerLibrary_size); |
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2365 return _buffer; |
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2366 } |
0 | 2367 |
2368 void AdapterHandlerLibrary::initialize() { | |
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2369 if (_adapters != NULL) return; |
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2370 _adapters = new AdapterHandlerTable(); |
0 | 2371 |
2372 // Create a special handler for abstract methods. Abstract methods | |
2373 // are never compiled so an i2c entry is somewhat meaningless, but | |
2374 // fill it in with something appropriate just in case. Pass handle | |
2375 // wrong method for the c2i transitions. | |
2376 address wrong_method = SharedRuntime::get_handle_wrong_method_stub(); | |
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2377 _abstract_method_handler = AdapterHandlerLibrary::new_entry(new AdapterFingerPrint(0, NULL), |
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2378 StubRoutines::throw_AbstractMethodError_entry(), |
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2379 wrong_method, wrong_method); |
0 | 2380 } |
2381 | |
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2382 AdapterHandlerEntry* AdapterHandlerLibrary::new_entry(AdapterFingerPrint* fingerprint, |
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2383 address i2c_entry, |
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2384 address c2i_entry, |
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2385 address c2i_unverified_entry) { |
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2386 return _adapters->new_entry(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry); |
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2387 } |
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2388 |
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2389 AdapterHandlerEntry* AdapterHandlerLibrary::get_adapter(methodHandle method) { |
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2390 // Use customized signature handler. Need to lock around updates to |
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2391 // the AdapterHandlerTable (it is not safe for concurrent readers |
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2392 // and a single writer: this could be fixed if it becomes a |
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2393 // problem). |
0 | 2394 |
2395 // Get the address of the ic_miss handlers before we grab the | |
2396 // AdapterHandlerLibrary_lock. This fixes bug 6236259 which | |
2397 // was caused by the initialization of the stubs happening | |
2398 // while we held the lock and then notifying jvmti while | |
2399 // holding it. This just forces the initialization to be a little | |
2400 // earlier. | |
2401 address ic_miss = SharedRuntime::get_ic_miss_stub(); | |
2402 assert(ic_miss != NULL, "must have handler"); | |
2403 | |
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2404 ResourceMark rm; |
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2405 |
1748 | 2406 NOT_PRODUCT(int insts_size); |
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2407 AdapterBlob* B = NULL; |
742
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2408 AdapterHandlerEntry* entry = NULL; |
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2409 AdapterFingerPrint* fingerprint = NULL; |
0 | 2410 { |
2411 MutexLocker mu(AdapterHandlerLibrary_lock); | |
2412 // make sure data structure is initialized | |
2413 initialize(); | |
2414 | |
2415 if (method->is_abstract()) { | |
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2416 return _abstract_method_handler; |
0 | 2417 } |
2418 | |
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2419 // Fill in the signature array, for the calling-convention call. |
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2420 int total_args_passed = method->size_of_parameters(); // All args on stack |
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2421 |
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2422 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed); |
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2423 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed); |
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2424 int i = 0; |
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2425 if (!method->is_static()) // Pass in receiver first |
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2426 sig_bt[i++] = T_OBJECT; |
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2427 for (SignatureStream ss(method->signature()); !ss.at_return_type(); ss.next()) { |
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2428 sig_bt[i++] = ss.type(); // Collect remaining bits of signature |
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2429 if (ss.type() == T_LONG || ss.type() == T_DOUBLE) |
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2430 sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
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2431 } |
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2432 assert(i == total_args_passed, ""); |
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2433 |
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2434 // Lookup method signature's fingerprint |
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2435 entry = _adapters->lookup(total_args_passed, sig_bt); |
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2436 |
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|
2437 #ifdef ASSERT |
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|
2438 AdapterHandlerEntry* shared_entry = NULL; |
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|
2439 if (VerifyAdapterSharing && entry != NULL) { |
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|
2440 shared_entry = entry; |
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|
2441 entry = NULL; |
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|
2442 } |
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|
2443 #endif |
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|
2444 |
1187
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2445 if (entry != NULL) { |
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2446 return entry; |
0 | 2447 } |
2448 | |
1207
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2449 // Get a description of the compiled java calling convention and the largest used (VMReg) stack slot usage |
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2450 int comp_args_on_stack = SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed, false); |
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2451 |
1187
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2452 // Make a C heap allocated version of the fingerprint to store in the adapter |
1207
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2453 fingerprint = new AdapterFingerPrint(total_args_passed, sig_bt); |
1187
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2454 |
0 | 2455 // Create I2C & C2I handlers |
2456 | |
1299
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6934494: JSR 292 MethodHandles adapters should be generated into their own CodeBlob
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2457 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
742
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2458 if (buf != NULL) { |
1748 | 2459 CodeBuffer buffer(buf); |
742
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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)); |
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2463 MacroAssembler _masm(&buffer); |
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2464 |
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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); |
0 | 2471 |
1207
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|
2472 #ifdef ASSERT |
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|
2473 if (VerifyAdapterSharing) { |
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|
2474 if (shared_entry != NULL) { |
1748 | 2475 assert(shared_entry->compare_code(buf->code_begin(), buffer.insts_size(), total_args_passed, sig_bt), |
1207
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|
2476 "code must match"); |
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|
2477 // Release the one just created and return the original |
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|
2478 _adapters->free_entry(entry); |
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|
2479 return shared_entry; |
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|
2480 } else { |
1748 | 2481 entry->save_code(buf->code_begin(), buffer.insts_size(), total_args_passed, sig_bt); |
1207
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|
2482 } |
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|
2483 } |
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|
2484 #endif |
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|
2485 |
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|
2486 B = AdapterBlob::create(&buffer); |
1748 | 2487 NOT_PRODUCT(insts_size = buffer.insts_size()); |
742
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2488 } |
28 | 2489 if (B == NULL) { |
2490 // CodeCache is full, disable compilation | |
2491 // Ought to log this but compile log is only per compile thread | |
2492 // and we're some non descript Java thread. | |
1202 | 2493 MutexUnlocker mu(AdapterHandlerLibrary_lock); |
2494 CompileBroker::handle_full_code_cache(); | |
1187
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2495 return NULL; // Out of CodeCache space |
28 | 2496 } |
1748 | 2497 entry->relocate(B->content_begin()); |
0 | 2498 #ifndef PRODUCT |
2499 // debugging suppport | |
2500 if (PrintAdapterHandlers) { | |
2501 tty->cr(); | |
1187
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|
2502 tty->print_cr("i2c argument handler #%d for: %s %s (fingerprint = %s, %d bytes generated)", |
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|
2503 _adapters->number_of_entries(), (method->is_static() ? "static" : "receiver"), |
1748 | 2504 method->signature()->as_C_string(), fingerprint->as_string(), insts_size ); |
0 | 2505 tty->print_cr("c2i argument handler starts at %p",entry->get_c2i_entry()); |
1748 | 2506 Disassembler::decode(entry->get_i2c_entry(), entry->get_i2c_entry() + insts_size); |
0 | 2507 } |
2508 #endif | |
2509 | |
1187
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|
2510 _adapters->add(entry); |
0 | 2511 } |
2512 // Outside of the lock | |
2513 if (B != NULL) { | |
2514 char blob_id[256]; | |
2515 jio_snprintf(blob_id, | |
2516 sizeof(blob_id), | |
1187
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|
2517 "%s(%s)@" PTR_FORMAT, |
1299
9eba43136cb5
6934494: JSR 292 MethodHandles adapters should be generated into their own CodeBlob
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diff
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|
2518 B->name(), |
1187
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|
2519 fingerprint->as_string(), |
1748 | 2520 B->content_begin()); |
2521 Forte::register_stub(blob_id, B->content_begin(), B->content_end()); | |
0 | 2522 |
2523 if (JvmtiExport::should_post_dynamic_code_generated()) { | |
1748 | 2524 JvmtiExport::post_dynamic_code_generated(blob_id, B->content_begin(), B->content_end()); |
0 | 2525 } |
2526 } | |
1187
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|
2527 return entry; |
0 | 2528 } |
2529 | |
2530 void AdapterHandlerEntry::relocate(address new_base) { | |
2531 ptrdiff_t delta = new_base - _i2c_entry; | |
2532 _i2c_entry += delta; | |
2533 _c2i_entry += delta; | |
2534 _c2i_unverified_entry += delta; | |
2535 } | |
2536 | |
1207
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|
2537 |
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|
2538 void AdapterHandlerEntry::deallocate() { |
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|
2539 delete _fingerprint; |
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|
2540 #ifdef ASSERT |
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|
2541 if (_saved_code) FREE_C_HEAP_ARRAY(unsigned char, _saved_code); |
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|
2542 if (_saved_sig) FREE_C_HEAP_ARRAY(Basictype, _saved_sig); |
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|
2543 #endif |
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|
2544 } |
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|
2545 |
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changeset
|
2546 |
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changeset
|
2547 #ifdef ASSERT |
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|
2548 // Capture the code before relocation so that it can be compared |
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|
2549 // against other versions. If the code is captured after relocation |
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|
2550 // then relative instructions won't be equivalent. |
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|
2551 void AdapterHandlerEntry::save_code(unsigned char* buffer, int length, int total_args_passed, BasicType* sig_bt) { |
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|
2552 _saved_code = NEW_C_HEAP_ARRAY(unsigned char, length); |
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|
2553 _code_length = length; |
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|
2554 memcpy(_saved_code, buffer, length); |
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|
2555 _total_args_passed = total_args_passed; |
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|
2556 _saved_sig = NEW_C_HEAP_ARRAY(BasicType, _total_args_passed); |
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|
2557 memcpy(_saved_sig, sig_bt, _total_args_passed * sizeof(BasicType)); |
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|
2558 } |
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|
2559 |
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|
2560 |
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|
2561 bool AdapterHandlerEntry::compare_code(unsigned char* buffer, int length, int total_args_passed, BasicType* sig_bt) { |
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|
2562 if (length != _code_length) { |
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|
2563 return false; |
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|
2564 } |
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|
2565 for (int i = 0; i < length; i++) { |
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|
2566 if (buffer[i] != _saved_code[i]) { |
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|
2567 return false; |
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|
2568 } |
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|
2569 } |
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|
2570 return true; |
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|
2571 } |
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|
2572 #endif |
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|
2573 |
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|
2574 |
0 | 2575 // Create a native wrapper for this native method. The wrapper converts the |
2576 // java compiled calling convention to the native convention, handlizes | |
2577 // arguments, and transitions to native. On return from the native we transition | |
2578 // back to java blocking if a safepoint is in progress. | |
2405
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|
2579 nmethod *AdapterHandlerLibrary::create_native_wrapper(methodHandle method, int compile_id) { |
0 | 2580 ResourceMark rm; |
2581 nmethod* nm = NULL; | |
2582 | |
2583 assert(method->has_native_function(), "must have something valid to call!"); | |
2584 | |
2585 { | |
2586 // perform the work while holding the lock, but perform any printing outside the lock | |
2587 MutexLocker mu(AdapterHandlerLibrary_lock); | |
2588 // See if somebody beat us to it | |
2589 nm = method->code(); | |
2590 if (nm) { | |
2591 return nm; | |
2592 } | |
2593 | |
742
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2594 ResourceMark rm; |
0 | 2595 |
742
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2596 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
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2597 if (buf != NULL) { |
1748 | 2598 CodeBuffer buffer(buf); |
742
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2599 double locs_buf[20]; |
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|
2600 buffer.insts()->initialize_shared_locs((relocInfo*)locs_buf, sizeof(locs_buf) / sizeof(relocInfo)); |
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|
2601 MacroAssembler _masm(&buffer); |
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|
2602 |
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2603 // Fill in the signature array, for the calling-convention call. |
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2604 int total_args_passed = method->size_of_parameters(); |
0 | 2605 |
742
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2606 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType,total_args_passed); |
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2607 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair,total_args_passed); |
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2608 int i=0; |
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2609 if( !method->is_static() ) // Pass in receiver first |
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|
2610 sig_bt[i++] = T_OBJECT; |
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|
2611 SignatureStream ss(method->signature()); |
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2612 for( ; !ss.at_return_type(); ss.next()) { |
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2613 sig_bt[i++] = ss.type(); // Collect remaining bits of signature |
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2614 if( ss.type() == T_LONG || ss.type() == T_DOUBLE ) |
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2615 sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
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|
2616 } |
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2617 assert( i==total_args_passed, "" ); |
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|
2618 BasicType ret_type = ss.type(); |
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|
2619 |
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|
2620 // Now get the compiled-Java layout as input arguments |
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2621 int comp_args_on_stack; |
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2622 comp_args_on_stack = SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed, false); |
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2623 |
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2624 // Generate the compiled-to-native wrapper code |
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2625 nm = SharedRuntime::generate_native_wrapper(&_masm, |
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2626 method, |
2405
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2627 compile_id, |
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2628 total_args_passed, |
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2629 comp_args_on_stack, |
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2630 sig_bt,regs, |
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2631 ret_type); |
0 | 2632 } |
2633 } | |
2634 | |
2635 // Must unlock before calling set_code | |
1728
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2636 |
0 | 2637 // Install the generated code. |
2638 if (nm != NULL) { | |
2405
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2639 if (PrintCompilation) { |
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2640 ttyLocker ttyl; |
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2641 CompileTask::print_compilation(tty, nm, method->is_static() ? "(static)" : ""); |
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2642 } |
0 | 2643 method->set_code(method, nm); |
2644 nm->post_compiled_method_load_event(); | |
2645 } else { | |
2646 // CodeCache is full, disable compilation | |
1202 | 2647 CompileBroker::handle_full_code_cache(); |
0 | 2648 } |
2649 return nm; | |
2650 } | |
2651 | |
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2652 #ifdef HAVE_DTRACE_H |
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2653 // Create a dtrace nmethod for this method. The wrapper converts the |
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2654 // java compiled calling convention to the native convention, makes a dummy call |
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2655 // (actually nops for the size of the call instruction, which become a trap if |
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2656 // probe is enabled). The returns to the caller. Since this all looks like a |
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2657 // leaf no thread transition is needed. |
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2658 |
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2659 nmethod *AdapterHandlerLibrary::create_dtrace_nmethod(methodHandle method) { |
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2660 ResourceMark rm; |
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2661 nmethod* nm = NULL; |
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2662 |
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2663 if (PrintCompilation) { |
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2664 ttyLocker ttyl; |
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2665 tty->print("--- n%s "); |
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2666 method->print_short_name(tty); |
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2667 if (method->is_static()) { |
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2668 tty->print(" (static)"); |
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2669 } |
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2670 tty->cr(); |
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2671 } |
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2672 |
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2673 { |
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2674 // perform the work while holding the lock, but perform any printing |
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2675 // outside the lock |
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2676 MutexLocker mu(AdapterHandlerLibrary_lock); |
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2677 // See if somebody beat us to it |
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2678 nm = method->code(); |
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2679 if (nm) { |
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2680 return nm; |
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2681 } |
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2682 |
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2683 ResourceMark rm; |
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2684 |
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2685 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
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2686 if (buf != NULL) { |
1748 | 2687 CodeBuffer buffer(buf); |
742
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2688 // Need a few relocation entries |
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2689 double locs_buf[20]; |
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2690 buffer.insts()->initialize_shared_locs( |
116
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2691 (relocInfo*)locs_buf, sizeof(locs_buf) / sizeof(relocInfo)); |
742
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2692 MacroAssembler _masm(&buffer); |
116
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2693 |
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2694 // Generate the compiled-to-native wrapper code |
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2695 nm = SharedRuntime::generate_dtrace_nmethod(&_masm, method); |
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2696 } |
116
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2697 } |
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2698 return nm; |
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2699 } |
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2700 |
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2701 // the dtrace method needs to convert java lang string to utf8 string. |
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2702 void SharedRuntime::get_utf(oopDesc* src, address dst) { |
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2703 typeArrayOop jlsValue = java_lang_String::value(src); |
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2704 int jlsOffset = java_lang_String::offset(src); |
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2705 int jlsLen = java_lang_String::length(src); |
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2706 jchar* jlsPos = (jlsLen == 0) ? NULL : |
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2707 jlsValue->char_at_addr(jlsOffset); |
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2708 assert(typeArrayKlass::cast(jlsValue->klass())->element_type() == T_CHAR, "compressed string"); |
116
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2709 (void) UNICODE::as_utf8(jlsPos, jlsLen, (char *)dst, max_dtrace_string_size); |
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2710 } |
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2711 #endif // ndef HAVE_DTRACE_H |
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2712 |
0 | 2713 // ------------------------------------------------------------------------- |
2714 // Java-Java calling convention | |
2715 // (what you use when Java calls Java) | |
2716 | |
2717 //------------------------------name_for_receiver---------------------------------- | |
2718 // For a given signature, return the VMReg for parameter 0. | |
2719 VMReg SharedRuntime::name_for_receiver() { | |
2720 VMRegPair regs; | |
2721 BasicType sig_bt = T_OBJECT; | |
2722 (void) java_calling_convention(&sig_bt, ®s, 1, true); | |
2723 // Return argument 0 register. In the LP64 build pointers | |
2724 // take 2 registers, but the VM wants only the 'main' name. | |
2725 return regs.first(); | |
2726 } | |
2727 | |
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2728 VMRegPair *SharedRuntime::find_callee_arguments(Symbol* sig, bool has_receiver, int* arg_size) { |
0 | 2729 // This method is returning a data structure allocating as a |
2730 // ResourceObject, so do not put any ResourceMarks in here. | |
2731 char *s = sig->as_C_string(); | |
2732 int len = (int)strlen(s); | |
2733 *s++; len--; // Skip opening paren | |
2734 char *t = s+len; | |
2735 while( *(--t) != ')' ) ; // Find close paren | |
2736 | |
2737 BasicType *sig_bt = NEW_RESOURCE_ARRAY( BasicType, 256 ); | |
2738 VMRegPair *regs = NEW_RESOURCE_ARRAY( VMRegPair, 256 ); | |
2739 int cnt = 0; | |
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2740 if (has_receiver) { |
0 | 2741 sig_bt[cnt++] = T_OBJECT; // Receiver is argument 0; not in signature |
2742 } | |
2743 | |
2744 while( s < t ) { | |
2745 switch( *s++ ) { // Switch on signature character | |
2746 case 'B': sig_bt[cnt++] = T_BYTE; break; | |
2747 case 'C': sig_bt[cnt++] = T_CHAR; break; | |
2748 case 'D': sig_bt[cnt++] = T_DOUBLE; sig_bt[cnt++] = T_VOID; break; | |
2749 case 'F': sig_bt[cnt++] = T_FLOAT; break; | |
2750 case 'I': sig_bt[cnt++] = T_INT; break; | |
2751 case 'J': sig_bt[cnt++] = T_LONG; sig_bt[cnt++] = T_VOID; break; | |
2752 case 'S': sig_bt[cnt++] = T_SHORT; break; | |
2753 case 'Z': sig_bt[cnt++] = T_BOOLEAN; break; | |
2754 case 'V': sig_bt[cnt++] = T_VOID; break; | |
2755 case 'L': // Oop | |
2756 while( *s++ != ';' ) ; // Skip signature | |
2757 sig_bt[cnt++] = T_OBJECT; | |
2758 break; | |
2759 case '[': { // Array | |
2760 do { // Skip optional size | |
2761 while( *s >= '0' && *s <= '9' ) s++; | |
2762 } while( *s++ == '[' ); // Nested arrays? | |
2763 // Skip element type | |
2764 if( s[-1] == 'L' ) | |
2765 while( *s++ != ';' ) ; // Skip signature | |
2766 sig_bt[cnt++] = T_ARRAY; | |
2767 break; | |
2768 } | |
2769 default : ShouldNotReachHere(); | |
2770 } | |
2771 } | |
2772 assert( cnt < 256, "grow table size" ); | |
2773 | |
2774 int comp_args_on_stack; | |
2775 comp_args_on_stack = java_calling_convention(sig_bt, regs, cnt, true); | |
2776 | |
2777 // the calling convention doesn't count out_preserve_stack_slots so | |
2778 // we must add that in to get "true" stack offsets. | |
2779 | |
2780 if (comp_args_on_stack) { | |
2781 for (int i = 0; i < cnt; i++) { | |
2782 VMReg reg1 = regs[i].first(); | |
2783 if( reg1->is_stack()) { | |
2784 // Yuck | |
2785 reg1 = reg1->bias(out_preserve_stack_slots()); | |
2786 } | |
2787 VMReg reg2 = regs[i].second(); | |
2788 if( reg2->is_stack()) { | |
2789 // Yuck | |
2790 reg2 = reg2->bias(out_preserve_stack_slots()); | |
2791 } | |
2792 regs[i].set_pair(reg2, reg1); | |
2793 } | |
2794 } | |
2795 | |
2796 // results | |
2797 *arg_size = cnt; | |
2798 return regs; | |
2799 } | |
2800 | |
2801 // OSR Migration Code | |
2802 // | |
2803 // This code is used convert interpreter frames into compiled frames. It is | |
2804 // called from very start of a compiled OSR nmethod. A temp array is | |
2805 // allocated to hold the interesting bits of the interpreter frame. All | |
2806 // active locks are inflated to allow them to move. The displaced headers and | |
2807 // active interpeter locals are copied into the temp buffer. Then we return | |
2808 // back to the compiled code. The compiled code then pops the current | |
2809 // interpreter frame off the stack and pushes a new compiled frame. Then it | |
2810 // copies the interpreter locals and displaced headers where it wants. | |
2811 // Finally it calls back to free the temp buffer. | |
2812 // | |
2813 // All of this is done NOT at any Safepoint, nor is any safepoint or GC allowed. | |
2814 | |
2815 JRT_LEAF(intptr_t*, SharedRuntime::OSR_migration_begin( JavaThread *thread) ) | |
2816 | |
2817 #ifdef IA64 | |
2818 ShouldNotReachHere(); // NYI | |
2819 #endif /* IA64 */ | |
2820 | |
2821 // | |
2822 // This code is dependent on the memory layout of the interpreter local | |
2823 // array and the monitors. On all of our platforms the layout is identical | |
2824 // so this code is shared. If some platform lays the their arrays out | |
2825 // differently then this code could move to platform specific code or | |
2826 // the code here could be modified to copy items one at a time using | |
2827 // frame accessor methods and be platform independent. | |
2828 | |
2829 frame fr = thread->last_frame(); | |
2830 assert( fr.is_interpreted_frame(), "" ); | |
2831 assert( fr.interpreter_frame_expression_stack_size()==0, "only handle empty stacks" ); | |
2832 | |
2833 // Figure out how many monitors are active. | |
2834 int active_monitor_count = 0; | |
2835 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); | |
2836 kptr < fr.interpreter_frame_monitor_begin(); | |
2837 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { | |
2838 if( kptr->obj() != NULL ) active_monitor_count++; | |
2839 } | |
2840 | |
2841 // QQQ we could place number of active monitors in the array so that compiled code | |
2842 // could double check it. | |
2843 | |
2844 methodOop moop = fr.interpreter_frame_method(); | |
2845 int max_locals = moop->max_locals(); | |
2846 // Allocate temp buffer, 1 word per local & 2 per active monitor | |
2847 int buf_size_words = max_locals + active_monitor_count*2; | |
2848 intptr_t *buf = NEW_C_HEAP_ARRAY(intptr_t,buf_size_words); | |
2849 | |
2850 // Copy the locals. Order is preserved so that loading of longs works. | |
2851 // Since there's no GC I can copy the oops blindly. | |
2852 assert( sizeof(HeapWord)==sizeof(intptr_t), "fix this code"); | |
1506 | 2853 Copy::disjoint_words((HeapWord*)fr.interpreter_frame_local_at(max_locals-1), |
0 | 2854 (HeapWord*)&buf[0], |
2855 max_locals); | |
2856 | |
2857 // Inflate locks. Copy the displaced headers. Be careful, there can be holes. | |
2858 int i = max_locals; | |
2859 for( BasicObjectLock *kptr2 = fr.interpreter_frame_monitor_end(); | |
2860 kptr2 < fr.interpreter_frame_monitor_begin(); | |
2861 kptr2 = fr.next_monitor_in_interpreter_frame(kptr2) ) { | |
2862 if( kptr2->obj() != NULL) { // Avoid 'holes' in the monitor array | |
2863 BasicLock *lock = kptr2->lock(); | |
2864 // Inflate so the displaced header becomes position-independent | |
2865 if (lock->displaced_header()->is_unlocked()) | |
2866 ObjectSynchronizer::inflate_helper(kptr2->obj()); | |
2867 // Now the displaced header is free to move | |
2868 buf[i++] = (intptr_t)lock->displaced_header(); | |
2869 buf[i++] = (intptr_t)kptr2->obj(); | |
2870 } | |
2871 } | |
2872 assert( i - max_locals == active_monitor_count*2, "found the expected number of monitors" ); | |
2873 | |
2874 return buf; | |
2875 JRT_END | |
2876 | |
2877 JRT_LEAF(void, SharedRuntime::OSR_migration_end( intptr_t* buf) ) | |
2878 FREE_C_HEAP_ARRAY(intptr_t,buf); | |
2879 JRT_END | |
2880 | |
2881 bool AdapterHandlerLibrary::contains(CodeBlob* b) { | |
1187
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2882 AdapterHandlerTableIterator iter(_adapters); |
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2883 while (iter.has_next()) { |
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2884 AdapterHandlerEntry* a = iter.next(); |
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2885 if ( b == CodeCache::find_blob(a->get_i2c_entry()) ) return true; |
0 | 2886 } |
2887 return false; | |
2888 } | |
2889 | |
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2890 void AdapterHandlerLibrary::print_handler_on(outputStream* st, CodeBlob* b) { |
1187
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2891 AdapterHandlerTableIterator iter(_adapters); |
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2892 while (iter.has_next()) { |
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2893 AdapterHandlerEntry* a = iter.next(); |
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2894 if ( b == CodeCache::find_blob(a->get_i2c_entry()) ) { |
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2895 st->print("Adapter for signature: "); |
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2896 st->print_cr("%s i2c: " INTPTR_FORMAT " c2i: " INTPTR_FORMAT " c2iUV: " INTPTR_FORMAT, |
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2897 a->fingerprint()->as_string(), |
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2898 a->get_i2c_entry(), a->get_c2i_entry(), a->get_c2i_unverified_entry()); |
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2899 |
0 | 2900 return; |
2901 } | |
2902 } | |
2903 assert(false, "Should have found handler"); | |
2904 } | |
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2905 |
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2906 #ifndef PRODUCT |
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2907 |
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2908 void AdapterHandlerLibrary::print_statistics() { |
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2909 _adapters->print_statistics(); |
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2910 } |
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2911 |
0 | 2912 #endif /* PRODUCT */ |