Mercurial > hg > truffle
annotate src/share/vm/oops/method.cpp @ 12073:f99558245e5c
8022832: Add WB APIs for OSR compilation
Reviewed-by: kvn
| author | iignatyev |
|---|---|
| date | Wed, 14 Aug 2013 23:50:23 +0400 |
| parents | 16511b7e3d35 |
| children | 6725044c5725 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2013, 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" |
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26 #include "classfile/metadataOnStackMark.hpp" |
| 1972 | 27 #include "classfile/systemDictionary.hpp" |
| 28 #include "code/debugInfoRec.hpp" | |
| 29 #include "gc_interface/collectedHeap.inline.hpp" | |
| 30 #include "interpreter/bytecodeStream.hpp" | |
| 31 #include "interpreter/bytecodeTracer.hpp" | |
| 32 #include "interpreter/bytecodes.hpp" | |
| 33 #include "interpreter/interpreter.hpp" | |
| 34 #include "interpreter/oopMapCache.hpp" | |
| 35 #include "memory/gcLocker.hpp" | |
| 36 #include "memory/generation.hpp" | |
| 7956 | 37 #include "memory/heapInspection.hpp" |
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38 #include "memory/metadataFactory.hpp" |
| 1972 | 39 #include "memory/oopFactory.hpp" |
| 6934 | 40 #include "oops/constMethod.hpp" |
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41 #include "oops/methodData.hpp" |
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42 #include "oops/method.hpp" |
| 1972 | 43 #include "oops/oop.inline.hpp" |
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44 #include "oops/symbol.hpp" |
| 1972 | 45 #include "prims/jvmtiExport.hpp" |
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46 #include "prims/methodHandles.hpp" |
| 1972 | 47 #include "prims/nativeLookup.hpp" |
| 48 #include "runtime/arguments.hpp" | |
| 49 #include "runtime/compilationPolicy.hpp" | |
| 50 #include "runtime/frame.inline.hpp" | |
| 51 #include "runtime/handles.inline.hpp" | |
| 52 #include "runtime/relocator.hpp" | |
| 53 #include "runtime/sharedRuntime.hpp" | |
| 54 #include "runtime/signature.hpp" | |
| 3779 | 55 #include "utilities/quickSort.hpp" |
| 1972 | 56 #include "utilities/xmlstream.hpp" |
| 0 | 57 |
| 58 | |
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59 // Implementation of Method |
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60 |
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61 Method* Method::allocate(ClassLoaderData* loader_data, |
| 6934 | 62 int byte_code_size, |
| 63 AccessFlags access_flags, | |
| 8031 | 64 InlineTableSizes* sizes, |
| 6934 | 65 ConstMethod::MethodType method_type, |
| 66 TRAPS) { | |
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67 assert(!access_flags.is_native() || byte_code_size == 0, |
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68 "native methods should not contain byte codes"); |
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69 ConstMethod* cm = ConstMethod::allocate(loader_data, |
| 6934 | 70 byte_code_size, |
| 8031 | 71 sizes, |
| 6934 | 72 method_type, |
| 73 CHECK_NULL); | |
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74 |
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75 int size = Method::size(access_flags.is_native()); |
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76 |
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77 return new (loader_data, size, false, MetaspaceObj::MethodType, THREAD) Method(cm, access_flags, size); |
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78 } |
| 0 | 79 |
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80 Method::Method(ConstMethod* xconst, AccessFlags access_flags, int size) { |
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81 No_Safepoint_Verifier no_safepoint; |
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82 set_constMethod(xconst); |
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83 set_access_flags(access_flags); |
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84 set_method_size(size); |
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85 #ifdef CC_INTERP |
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86 set_result_index(T_VOID); |
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87 #endif |
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88 set_intrinsic_id(vmIntrinsics::_none); |
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89 set_jfr_towrite(false); |
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90 set_force_inline(false); |
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91 set_hidden(false); |
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92 set_dont_inline(false); |
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93 set_method_data(NULL); |
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94 set_method_counters(NULL); |
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95 set_vtable_index(Method::garbage_vtable_index); |
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96 |
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97 // Fix and bury in Method* |
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98 set_interpreter_entry(NULL); // sets i2i entry and from_int |
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99 set_adapter_entry(NULL); |
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100 clear_code(); // from_c/from_i get set to c2i/i2i |
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101 |
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102 if (access_flags.is_native()) { |
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103 clear_native_function(); |
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104 set_signature_handler(NULL); |
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105 } |
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106 |
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107 NOT_PRODUCT(set_compiled_invocation_count(0);) |
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108 } |
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109 |
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110 // Release Method*. The nmethod will be gone when we get here because |
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111 // we've walked the code cache. |
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112 void Method::deallocate_contents(ClassLoaderData* loader_data) { |
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113 MetadataFactory::free_metadata(loader_data, constMethod()); |
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114 set_constMethod(NULL); |
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115 MetadataFactory::free_metadata(loader_data, method_data()); |
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116 set_method_data(NULL); |
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117 MetadataFactory::free_metadata(loader_data, method_counters()); |
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118 set_method_counters(NULL); |
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119 // The nmethod will be gone when we get here. |
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120 if (code() != NULL) _code = NULL; |
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121 } |
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122 |
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123 address Method::get_i2c_entry() { |
| 0 | 124 assert(_adapter != NULL, "must have"); |
| 125 return _adapter->get_i2c_entry(); | |
| 126 } | |
| 127 | |
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128 address Method::get_c2i_entry() { |
| 0 | 129 assert(_adapter != NULL, "must have"); |
| 130 return _adapter->get_c2i_entry(); | |
| 131 } | |
| 132 | |
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133 address Method::get_c2i_unverified_entry() { |
| 0 | 134 assert(_adapter != NULL, "must have"); |
| 135 return _adapter->get_c2i_unverified_entry(); | |
| 136 } | |
| 137 | |
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138 char* Method::name_and_sig_as_C_string() const { |
| 6983 | 139 return name_and_sig_as_C_string(constants()->pool_holder(), name(), signature()); |
| 0 | 140 } |
| 141 | |
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142 char* Method::name_and_sig_as_C_string(char* buf, int size) const { |
| 6983 | 143 return name_and_sig_as_C_string(constants()->pool_holder(), name(), signature(), buf, size); |
| 0 | 144 } |
| 145 | |
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146 char* Method::name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature) { |
| 0 | 147 const char* klass_name = klass->external_name(); |
| 148 int klass_name_len = (int)strlen(klass_name); | |
| 149 int method_name_len = method_name->utf8_length(); | |
| 150 int len = klass_name_len + 1 + method_name_len + signature->utf8_length(); | |
| 151 char* dest = NEW_RESOURCE_ARRAY(char, len + 1); | |
| 152 strcpy(dest, klass_name); | |
| 153 dest[klass_name_len] = '.'; | |
| 154 strcpy(&dest[klass_name_len + 1], method_name->as_C_string()); | |
| 155 strcpy(&dest[klass_name_len + 1 + method_name_len], signature->as_C_string()); | |
| 156 dest[len] = 0; | |
| 157 return dest; | |
| 158 } | |
| 159 | |
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160 char* Method::name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size) { |
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161 Symbol* klass_name = klass->name(); |
| 0 | 162 klass_name->as_klass_external_name(buf, size); |
| 163 int len = (int)strlen(buf); | |
| 164 | |
| 165 if (len < size - 1) { | |
| 166 buf[len++] = '.'; | |
| 167 | |
| 168 method_name->as_C_string(&(buf[len]), size - len); | |
| 169 len = (int)strlen(buf); | |
| 170 | |
| 171 signature->as_C_string(&(buf[len]), size - len); | |
| 172 } | |
| 173 | |
| 174 return buf; | |
| 175 } | |
| 176 | |
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177 int Method::fast_exception_handler_bci_for(methodHandle mh, KlassHandle ex_klass, int throw_bci, TRAPS) { |
| 0 | 178 // exception table holds quadruple entries of the form (beg_bci, end_bci, handler_bci, klass_index) |
| 179 // access exception table | |
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180 ExceptionTable table(mh()); |
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181 int length = table.length(); |
| 0 | 182 // iterate through all entries sequentially |
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183 constantPoolHandle pool(THREAD, mh->constants()); |
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184 for (int i = 0; i < length; i ++) { |
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185 //reacquire the table in case a GC happened |
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186 ExceptionTable table(mh()); |
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187 int beg_bci = table.start_pc(i); |
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188 int end_bci = table.end_pc(i); |
| 0 | 189 assert(beg_bci <= end_bci, "inconsistent exception table"); |
| 190 if (beg_bci <= throw_bci && throw_bci < end_bci) { | |
| 191 // exception handler bci range covers throw_bci => investigate further | |
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192 int handler_bci = table.handler_pc(i); |
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193 int klass_index = table.catch_type_index(i); |
| 0 | 194 if (klass_index == 0) { |
| 195 return handler_bci; | |
| 196 } else if (ex_klass.is_null()) { | |
| 197 return handler_bci; | |
| 198 } else { | |
| 199 // we know the exception class => get the constraint class | |
| 200 // this may require loading of the constraint class; if verification | |
| 201 // fails or some other exception occurs, return handler_bci | |
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202 Klass* k = pool->klass_at(klass_index, CHECK_(handler_bci)); |
| 0 | 203 KlassHandle klass = KlassHandle(THREAD, k); |
| 204 assert(klass.not_null(), "klass not loaded"); | |
| 205 if (ex_klass->is_subtype_of(klass())) { | |
| 206 return handler_bci; | |
| 207 } | |
| 208 } | |
| 209 } | |
| 210 } | |
| 211 | |
| 212 return -1; | |
| 213 } | |
| 214 | |
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215 void Method::mask_for(int bci, InterpreterOopMap* mask) { |
| 0 | 216 |
| 217 Thread* myThread = Thread::current(); | |
| 218 methodHandle h_this(myThread, this); | |
| 219 #ifdef ASSERT | |
| 220 bool has_capability = myThread->is_VM_thread() || | |
| 221 myThread->is_ConcurrentGC_thread() || | |
| 222 myThread->is_GC_task_thread(); | |
| 223 | |
| 224 if (!has_capability) { | |
| 225 if (!VerifyStack && !VerifyLastFrame) { | |
| 226 // verify stack calls this outside VM thread | |
| 227 warning("oopmap should only be accessed by the " | |
| 228 "VM, GC task or CMS threads (or during debugging)"); | |
| 229 InterpreterOopMap local_mask; | |
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230 method_holder()->mask_for(h_this, bci, &local_mask); |
| 0 | 231 local_mask.print(); |
| 232 } | |
| 233 } | |
| 234 #endif | |
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235 method_holder()->mask_for(h_this, bci, mask); |
| 0 | 236 return; |
| 237 } | |
| 238 | |
| 239 | |
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240 int Method::bci_from(address bcp) const { |
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241 #ifdef ASSERT |
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242 { ResourceMark rm; |
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243 assert(is_native() && bcp == code_base() || contains(bcp) || is_error_reported(), |
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244 err_msg("bcp doesn't belong to this method: bcp: " INTPTR_FORMAT ", method: %s", bcp, name_and_sig_as_C_string())); |
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245 } |
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246 #endif |
| 0 | 247 return bcp - code_base(); |
| 248 } | |
| 249 | |
| 250 | |
| 251 // Return (int)bcx if it appears to be a valid BCI. | |
| 252 // Return bci_from((address)bcx) if it appears to be a valid BCP. | |
| 253 // Return -1 otherwise. | |
| 254 // Used by profiling code, when invalid data is a possibility. | |
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255 // The caller is responsible for validating the Method* itself. |
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256 int Method::validate_bci_from_bcx(intptr_t bcx) const { |
| 0 | 257 // keep bci as -1 if not a valid bci |
| 258 int bci = -1; | |
| 259 if (bcx == 0 || (address)bcx == code_base()) { | |
| 260 // code_size() may return 0 and we allow 0 here | |
| 261 // the method may be native | |
| 262 bci = 0; | |
| 263 } else if (frame::is_bci(bcx)) { | |
| 264 if (bcx < code_size()) { | |
| 265 bci = (int)bcx; | |
| 266 } | |
| 267 } else if (contains((address)bcx)) { | |
| 268 bci = (address)bcx - code_base(); | |
| 269 } | |
| 270 // Assert that if we have dodged any asserts, bci is negative. | |
| 271 assert(bci == -1 || bci == bci_from(bcp_from(bci)), "sane bci if >=0"); | |
| 272 return bci; | |
| 273 } | |
| 274 | |
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275 address Method::bcp_from(int bci) const { |
| 0 | 276 assert((is_native() && bci == 0) || (!is_native() && 0 <= bci && bci < code_size()), "illegal bci"); |
| 277 address bcp = code_base() + bci; | |
| 278 assert(is_native() && bcp == code_base() || contains(bcp), "bcp doesn't belong to this method"); | |
| 279 return bcp; | |
| 280 } | |
| 281 | |
| 282 | |
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283 int Method::size(bool is_native) { |
| 0 | 284 // If native, then include pointers for native_function and signature_handler |
| 285 int extra_bytes = (is_native) ? 2*sizeof(address*) : 0; | |
| 286 int extra_words = align_size_up(extra_bytes, BytesPerWord) / BytesPerWord; | |
| 287 return align_object_size(header_size() + extra_words); | |
| 288 } | |
| 289 | |
| 290 | |
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291 Symbol* Method::klass_name() const { |
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292 Klass* k = method_holder(); |
| 0 | 293 assert(k->is_klass(), "must be klass"); |
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294 InstanceKlass* ik = (InstanceKlass*) k; |
| 0 | 295 return ik->name(); |
| 296 } | |
| 297 | |
| 298 | |
| 299 // Attempt to return method oop to original state. Clear any pointers | |
| 300 // (to objects outside the shared spaces). We won't be able to predict | |
| 301 // where they should point in a new JVM. Further initialize some | |
| 302 // entries now in order allow them to be write protected later. | |
| 303 | |
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304 void Method::remove_unshareable_info() { |
| 0 | 305 unlink_method(); |
| 306 } | |
| 307 | |
| 308 | |
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309 bool Method::was_executed_more_than(int n) { |
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310 // Invocation counter is reset when the Method* is compiled. |
| 0 | 311 // If the method has compiled code we therefore assume it has |
| 312 // be excuted more than n times. | |
| 313 if (is_accessor() || is_empty_method() || (code() != NULL)) { | |
| 314 // interpreter doesn't bump invocation counter of trivial methods | |
| 315 // compiler does not bump invocation counter of compiled methods | |
| 316 return true; | |
| 1783 | 317 } |
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318 else if ((method_counters() != NULL && |
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319 method_counters()->invocation_counter()->carry()) || |
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320 (method_data() != NULL && |
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321 method_data()->invocation_counter()->carry())) { |
| 0 | 322 // The carry bit is set when the counter overflows and causes |
| 323 // a compilation to occur. We don't know how many times | |
| 324 // the counter has been reset, so we simply assume it has | |
| 325 // been executed more than n times. | |
| 326 return true; | |
| 327 } else { | |
| 328 return invocation_count() > n; | |
| 329 } | |
| 330 } | |
| 331 | |
| 332 #ifndef PRODUCT | |
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333 void Method::print_invocation_count() { |
| 0 | 334 if (is_static()) tty->print("static "); |
| 335 if (is_final()) tty->print("final "); | |
| 336 if (is_synchronized()) tty->print("synchronized "); | |
| 337 if (is_native()) tty->print("native "); | |
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338 method_holder()->name()->print_symbol_on(tty); |
| 0 | 339 tty->print("."); |
| 340 name()->print_symbol_on(tty); | |
| 341 signature()->print_symbol_on(tty); | |
| 342 | |
| 343 if (WizardMode) { | |
| 344 // dump the size of the byte codes | |
| 345 tty->print(" {%d}", code_size()); | |
| 346 } | |
| 347 tty->cr(); | |
| 348 | |
| 349 tty->print_cr (" interpreter_invocation_count: %8d ", interpreter_invocation_count()); | |
| 350 tty->print_cr (" invocation_counter: %8d ", invocation_count()); | |
| 351 tty->print_cr (" backedge_counter: %8d ", backedge_count()); | |
| 352 if (CountCompiledCalls) { | |
| 353 tty->print_cr (" compiled_invocation_count: %8d ", compiled_invocation_count()); | |
| 354 } | |
| 355 | |
| 356 } | |
| 357 #endif | |
| 358 | |
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359 // Build a MethodData* object to hold information about this method |
| 0 | 360 // collected in the interpreter. |
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361 void Method::build_interpreter_method_data(methodHandle method, TRAPS) { |
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362 // Do not profile method if current thread holds the pending list lock, |
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363 // which avoids deadlock for acquiring the MethodData_lock. |
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364 if (InstanceRefKlass::owns_pending_list_lock((JavaThread*)THREAD)) { |
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365 return; |
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366 } |
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367 |
| 0 | 368 // Grab a lock here to prevent multiple |
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369 // MethodData*s from being created. |
| 0 | 370 MutexLocker ml(MethodData_lock, THREAD); |
| 371 if (method->method_data() == NULL) { | |
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372 ClassLoaderData* loader_data = method->method_holder()->class_loader_data(); |
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373 MethodData* method_data = MethodData::allocate(loader_data, method, CHECK); |
| 0 | 374 method->set_method_data(method_data); |
| 375 if (PrintMethodData && (Verbose || WizardMode)) { | |
| 376 ResourceMark rm(THREAD); | |
| 377 tty->print("build_interpreter_method_data for "); | |
| 378 method->print_name(tty); | |
| 379 tty->cr(); | |
| 380 // At the end of the run, the MDO, full of data, will be dumped. | |
| 381 } | |
| 382 } | |
| 383 } | |
| 384 | |
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385 MethodCounters* Method::build_method_counters(Method* m, TRAPS) { |
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386 methodHandle mh(m); |
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387 ClassLoaderData* loader_data = mh->method_holder()->class_loader_data(); |
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388 MethodCounters* counters = MethodCounters::allocate(loader_data, CHECK_NULL); |
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389 if (mh->method_counters() == NULL) { |
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390 mh->set_method_counters(counters); |
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391 } else { |
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392 MetadataFactory::free_metadata(loader_data, counters); |
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393 } |
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394 return mh->method_counters(); |
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395 } |
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396 |
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397 void Method::cleanup_inline_caches() { |
| 0 | 398 // The current system doesn't use inline caches in the interpreter |
| 399 // => nothing to do (keep this method around for future use) | |
| 400 } | |
| 401 | |
| 402 | |
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403 int Method::extra_stack_words() { |
| 710 | 404 // not an inline function, to avoid a header dependency on Interpreter |
| 1506 | 405 return extra_stack_entries() * Interpreter::stackElementSize; |
| 710 | 406 } |
| 407 | |
| 408 | |
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409 void Method::compute_size_of_parameters(Thread *thread) { |
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410 ArgumentSizeComputer asc(signature()); |
| 0 | 411 set_size_of_parameters(asc.size() + (is_static() ? 0 : 1)); |
| 412 } | |
| 413 | |
| 414 #ifdef CC_INTERP | |
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415 void Method::set_result_index(BasicType type) { |
| 0 | 416 _result_index = Interpreter::BasicType_as_index(type); |
| 417 } | |
| 418 #endif | |
| 419 | |
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420 BasicType Method::result_type() const { |
| 0 | 421 ResultTypeFinder rtf(signature()); |
| 422 return rtf.type(); | |
| 423 } | |
| 424 | |
| 425 | |
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426 bool Method::is_empty_method() const { |
| 0 | 427 return code_size() == 1 |
| 428 && *code_base() == Bytecodes::_return; | |
| 429 } | |
| 430 | |
| 431 | |
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432 bool Method::is_vanilla_constructor() const { |
| 0 | 433 // Returns true if this method is a vanilla constructor, i.e. an "<init>" "()V" method |
| 434 // which only calls the superclass vanilla constructor and possibly does stores of | |
| 435 // zero constants to local fields: | |
| 436 // | |
| 437 // aload_0 | |
| 438 // invokespecial | |
| 439 // indexbyte1 | |
| 440 // indexbyte2 | |
| 441 // | |
| 442 // followed by an (optional) sequence of: | |
| 443 // | |
| 444 // aload_0 | |
| 445 // aconst_null / iconst_0 / fconst_0 / dconst_0 | |
| 446 // putfield | |
| 447 // indexbyte1 | |
| 448 // indexbyte2 | |
| 449 // | |
| 450 // followed by: | |
| 451 // | |
| 452 // return | |
| 453 | |
| 454 assert(name() == vmSymbols::object_initializer_name(), "Should only be called for default constructors"); | |
| 455 assert(signature() == vmSymbols::void_method_signature(), "Should only be called for default constructors"); | |
| 456 int size = code_size(); | |
| 457 // Check if size match | |
| 458 if (size == 0 || size % 5 != 0) return false; | |
| 459 address cb = code_base(); | |
| 460 int last = size - 1; | |
| 461 if (cb[0] != Bytecodes::_aload_0 || cb[1] != Bytecodes::_invokespecial || cb[last] != Bytecodes::_return) { | |
| 462 // Does not call superclass default constructor | |
| 463 return false; | |
| 464 } | |
| 465 // Check optional sequence | |
| 466 for (int i = 4; i < last; i += 5) { | |
| 467 if (cb[i] != Bytecodes::_aload_0) return false; | |
| 468 if (!Bytecodes::is_zero_const(Bytecodes::cast(cb[i+1]))) return false; | |
| 469 if (cb[i+2] != Bytecodes::_putfield) return false; | |
| 470 } | |
| 471 return true; | |
| 472 } | |
| 473 | |
| 474 | |
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475 bool Method::compute_has_loops_flag() { |
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476 BytecodeStream bcs(this); |
| 0 | 477 Bytecodes::Code bc; |
| 478 | |
| 479 while ((bc = bcs.next()) >= 0) { | |
| 480 switch( bc ) { | |
| 481 case Bytecodes::_ifeq: | |
| 482 case Bytecodes::_ifnull: | |
| 483 case Bytecodes::_iflt: | |
| 484 case Bytecodes::_ifle: | |
| 485 case Bytecodes::_ifne: | |
| 486 case Bytecodes::_ifnonnull: | |
| 487 case Bytecodes::_ifgt: | |
| 488 case Bytecodes::_ifge: | |
| 489 case Bytecodes::_if_icmpeq: | |
| 490 case Bytecodes::_if_icmpne: | |
| 491 case Bytecodes::_if_icmplt: | |
| 492 case Bytecodes::_if_icmpgt: | |
| 493 case Bytecodes::_if_icmple: | |
| 494 case Bytecodes::_if_icmpge: | |
| 495 case Bytecodes::_if_acmpeq: | |
| 496 case Bytecodes::_if_acmpne: | |
| 497 case Bytecodes::_goto: | |
| 498 case Bytecodes::_jsr: | |
| 499 if( bcs.dest() < bcs.next_bci() ) _access_flags.set_has_loops(); | |
| 500 break; | |
| 501 | |
| 502 case Bytecodes::_goto_w: | |
| 503 case Bytecodes::_jsr_w: | |
| 504 if( bcs.dest_w() < bcs.next_bci() ) _access_flags.set_has_loops(); | |
| 505 break; | |
| 506 } | |
| 507 } | |
| 508 _access_flags.set_loops_flag_init(); | |
| 509 return _access_flags.has_loops(); | |
| 510 } | |
| 511 | |
| 512 | |
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513 bool Method::is_final_method() const { |
| 0 | 514 // %%% Should return true for private methods also, |
| 515 // since there is no way to override them. | |
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516 return is_final() || method_holder()->is_final(); |
| 0 | 517 } |
| 518 | |
| 519 | |
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520 bool Method::is_strict_method() const { |
| 0 | 521 return is_strict(); |
| 522 } | |
| 523 | |
| 524 | |
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525 bool Method::can_be_statically_bound() const { |
| 0 | 526 if (is_final_method()) return true; |
| 527 return vtable_index() == nonvirtual_vtable_index; | |
| 528 } | |
| 529 | |
| 530 | |
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531 bool Method::is_accessor() const { |
| 0 | 532 if (code_size() != 5) return false; |
| 533 if (size_of_parameters() != 1) return false; | |
| 2142 | 534 if (java_code_at(0) != Bytecodes::_aload_0 ) return false; |
| 535 if (java_code_at(1) != Bytecodes::_getfield) return false; | |
| 536 if (java_code_at(4) != Bytecodes::_areturn && | |
| 537 java_code_at(4) != Bytecodes::_ireturn ) return false; | |
| 0 | 538 return true; |
| 539 } | |
| 540 | |
| 541 | |
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542 bool Method::is_initializer() const { |
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543 return name() == vmSymbols::object_initializer_name() || is_static_initializer(); |
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544 } |
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545 |
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546 bool Method::has_valid_initializer_flags() const { |
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547 return (is_static() || |
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548 method_holder()->major_version() < 51); |
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549 } |
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550 |
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551 bool Method::is_static_initializer() const { |
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552 // For classfiles version 51 or greater, ensure that the clinit method is |
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553 // static. Non-static methods with the name "<clinit>" are not static |
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554 // initializers. (older classfiles exempted for backward compatibility) |
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555 return name() == vmSymbols::class_initializer_name() && |
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556 has_valid_initializer_flags(); |
| 0 | 557 } |
| 558 | |
| 559 | |
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560 objArrayHandle Method::resolved_checked_exceptions_impl(Method* this_oop, TRAPS) { |
| 0 | 561 int length = this_oop->checked_exceptions_length(); |
| 562 if (length == 0) { // common case | |
| 563 return objArrayHandle(THREAD, Universe::the_empty_class_klass_array()); | |
| 564 } else { | |
| 565 methodHandle h_this(THREAD, this_oop); | |
| 1142 | 566 objArrayOop m_oop = oopFactory::new_objArray(SystemDictionary::Class_klass(), length, CHECK_(objArrayHandle())); |
| 0 | 567 objArrayHandle mirrors (THREAD, m_oop); |
| 568 for (int i = 0; i < length; i++) { | |
| 569 CheckedExceptionElement* table = h_this->checked_exceptions_start(); // recompute on each iteration, not gc safe | |
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570 Klass* k = h_this->constants()->klass_at(table[i].class_cp_index, CHECK_(objArrayHandle())); |
| 6983 | 571 assert(k->is_subclass_of(SystemDictionary::Throwable_klass()), "invalid exception class"); |
| 572 mirrors->obj_at_put(i, k->java_mirror()); | |
| 0 | 573 } |
| 574 return mirrors; | |
| 575 } | |
| 576 }; | |
| 577 | |
| 578 | |
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579 int Method::line_number_from_bci(int bci) const { |
| 0 | 580 if (bci == SynchronizationEntryBCI) bci = 0; |
| 581 assert(bci == 0 || 0 <= bci && bci < code_size(), "illegal bci"); | |
| 582 int best_bci = 0; | |
| 583 int best_line = -1; | |
| 584 | |
| 585 if (has_linenumber_table()) { | |
| 586 // The line numbers are a short array of 2-tuples [start_pc, line_number]. | |
| 587 // Not necessarily sorted and not necessarily one-to-one. | |
| 588 CompressedLineNumberReadStream stream(compressed_linenumber_table()); | |
| 589 while (stream.read_pair()) { | |
| 590 if (stream.bci() == bci) { | |
| 591 // perfect match | |
| 592 return stream.line(); | |
| 593 } else { | |
| 594 // update best_bci/line | |
| 595 if (stream.bci() < bci && stream.bci() >= best_bci) { | |
| 596 best_bci = stream.bci(); | |
| 597 best_line = stream.line(); | |
| 598 } | |
| 599 } | |
| 600 } | |
| 601 } | |
| 602 return best_line; | |
| 603 } | |
| 604 | |
| 605 | |
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606 bool Method::is_klass_loaded_by_klass_index(int klass_index) const { |
|
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607 if( constants()->tag_at(klass_index).is_unresolved_klass() ) { |
| 0 | 608 Thread *thread = Thread::current(); |
|
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609 Symbol* klass_name = constants()->klass_name_at(klass_index); |
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610 Handle loader(thread, method_holder()->class_loader()); |
| 6983 | 611 Handle prot (thread, method_holder()->protection_domain()); |
| 0 | 612 return SystemDictionary::find(klass_name, loader, prot, thread) != NULL; |
| 613 } else { | |
| 614 return true; | |
| 615 } | |
| 616 } | |
| 617 | |
| 618 | |
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619 bool Method::is_klass_loaded(int refinfo_index, bool must_be_resolved) const { |
|
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620 int klass_index = constants()->klass_ref_index_at(refinfo_index); |
| 0 | 621 if (must_be_resolved) { |
| 622 // Make sure klass is resolved in constantpool. | |
| 623 if (constants()->tag_at(klass_index).is_unresolved_klass()) return false; | |
| 624 } | |
| 625 return is_klass_loaded_by_klass_index(klass_index); | |
| 626 } | |
| 627 | |
| 628 | |
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629 void Method::set_native_function(address function, bool post_event_flag) { |
| 0 | 630 assert(function != NULL, "use clear_native_function to unregister natives"); |
|
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631 assert(!is_method_handle_intrinsic() || function == SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), ""); |
| 0 | 632 address* native_function = native_function_addr(); |
| 633 | |
| 634 // We can see racers trying to place the same native function into place. Once | |
| 635 // is plenty. | |
| 636 address current = *native_function; | |
| 637 if (current == function) return; | |
| 638 if (post_event_flag && JvmtiExport::should_post_native_method_bind() && | |
| 639 function != NULL) { | |
| 640 // native_method_throw_unsatisfied_link_error_entry() should only | |
| 641 // be passed when post_event_flag is false. | |
| 642 assert(function != | |
| 643 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
| 644 "post_event_flag mis-match"); | |
| 645 | |
| 646 // post the bind event, and possible change the bind function | |
| 647 JvmtiExport::post_native_method_bind(this, &function); | |
| 648 } | |
| 649 *native_function = function; | |
| 650 // This function can be called more than once. We must make sure that we always | |
| 651 // use the latest registered method -> check if a stub already has been generated. | |
| 652 // If so, we have to make it not_entrant. | |
| 653 nmethod* nm = code(); // Put it into local variable to guard against concurrent updates | |
| 654 if (nm != NULL) { | |
| 655 nm->make_not_entrant(); | |
| 656 } | |
| 657 } | |
| 658 | |
| 659 | |
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660 bool Method::has_native_function() const { |
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661 if (is_method_handle_intrinsic()) |
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662 return false; // special-cased in SharedRuntime::generate_native_wrapper |
| 0 | 663 address func = native_function(); |
| 664 return (func != NULL && func != SharedRuntime::native_method_throw_unsatisfied_link_error_entry()); | |
| 665 } | |
| 666 | |
| 667 | |
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668 void Method::clear_native_function() { |
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669 // Note: is_method_handle_intrinsic() is allowed here. |
| 0 | 670 set_native_function( |
| 671 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
| 672 !native_bind_event_is_interesting); | |
| 673 clear_code(); | |
| 674 } | |
| 675 | |
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676 address Method::critical_native_function() { |
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677 methodHandle mh(this); |
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678 return NativeLookup::lookup_critical_entry(mh); |
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679 } |
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680 |
| 0 | 681 |
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682 void Method::set_signature_handler(address handler) { |
| 0 | 683 address* signature_handler = signature_handler_addr(); |
| 684 *signature_handler = handler; | |
| 685 } | |
| 686 | |
| 687 | |
| 7998 | 688 void Method::print_made_not_compilable(int comp_level, bool is_osr, bool report, const char* reason) { |
|
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689 if (PrintCompilation && report) { |
|
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690 ttyLocker ttyl; |
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691 tty->print("made not %scompilable on ", is_osr ? "OSR " : ""); |
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692 if (comp_level == CompLevel_all) { |
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693 tty->print("all levels "); |
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694 } else { |
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695 tty->print("levels "); |
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696 for (int i = (int)CompLevel_none; i <= comp_level; i++) { |
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697 tty->print("%d ", i); |
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698 } |
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699 } |
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700 this->print_short_name(tty); |
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701 int size = this->code_size(); |
| 7998 | 702 if (size > 0) { |
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703 tty->print(" (%d bytes)", size); |
| 7998 | 704 } |
| 705 if (reason != NULL) { | |
| 706 tty->print(" %s", reason); | |
| 707 } | |
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708 tty->cr(); |
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709 } |
| 0 | 710 if ((TraceDeoptimization || LogCompilation) && (xtty != NULL)) { |
| 711 ttyLocker ttyl; | |
| 6843 | 712 xtty->begin_elem("make_not_%scompilable thread='" UINTX_FORMAT "'", |
| 713 is_osr ? "osr_" : "", os::current_thread_id()); | |
| 7998 | 714 if (reason != NULL) { |
| 715 xtty->print(" reason=\'%s\'", reason); | |
| 716 } | |
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717 xtty->method(this); |
| 0 | 718 xtty->stamp(); |
| 719 xtty->end_elem(); | |
| 720 } | |
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721 } |
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722 |
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723 bool Method::is_not_compilable(int comp_level) const { |
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724 if (number_of_breakpoints() > 0) |
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725 return true; |
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726 if (is_method_handle_intrinsic()) |
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727 return !is_synthetic(); // the generated adapters must be compiled |
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728 if (comp_level == CompLevel_any) |
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729 return is_not_c1_compilable() || is_not_c2_compilable(); |
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730 if (is_c1_compile(comp_level)) |
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731 return is_not_c1_compilable(); |
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732 if (is_c2_compile(comp_level)) |
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733 return is_not_c2_compilable(); |
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734 return false; |
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735 } |
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736 |
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|
737 // call this when compiler finds that this method is not compilable |
| 7998 | 738 void Method::set_not_compilable(int comp_level, bool report, const char* reason) { |
| 739 print_made_not_compilable(comp_level, /*is_osr*/ false, report, reason); | |
| 1783 | 740 if (comp_level == CompLevel_all) { |
| 741 set_not_c1_compilable(); | |
| 742 set_not_c2_compilable(); | |
| 743 } else { | |
|
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744 if (is_c1_compile(comp_level)) |
| 1783 | 745 set_not_c1_compilable(); |
|
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746 if (is_c2_compile(comp_level)) |
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747 set_not_c2_compilable(); |
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748 } |
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749 CompilationPolicy::policy()->disable_compilation(this); |
| 12073 | 750 assert(!CompilationPolicy::can_be_compiled(this, comp_level), "sanity check"); |
|
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751 } |
|
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752 |
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753 bool Method::is_not_osr_compilable(int comp_level) const { |
|
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754 if (is_not_compilable(comp_level)) |
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755 return true; |
|
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756 if (comp_level == CompLevel_any) |
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757 return is_not_c1_osr_compilable() || is_not_c2_osr_compilable(); |
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758 if (is_c1_compile(comp_level)) |
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759 return is_not_c1_osr_compilable(); |
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760 if (is_c2_compile(comp_level)) |
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761 return is_not_c2_osr_compilable(); |
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762 return false; |
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763 } |
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764 |
| 7998 | 765 void Method::set_not_osr_compilable(int comp_level, bool report, const char* reason) { |
| 766 print_made_not_compilable(comp_level, /*is_osr*/ true, report, reason); | |
|
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767 if (comp_level == CompLevel_all) { |
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768 set_not_c1_osr_compilable(); |
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769 set_not_c2_osr_compilable(); |
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770 } else { |
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771 if (is_c1_compile(comp_level)) |
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772 set_not_c1_osr_compilable(); |
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773 if (is_c2_compile(comp_level)) |
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774 set_not_c2_osr_compilable(); |
| 0 | 775 } |
| 1783 | 776 CompilationPolicy::policy()->disable_compilation(this); |
| 12073 | 777 assert(!CompilationPolicy::can_be_osr_compiled(this, comp_level), "sanity check"); |
| 0 | 778 } |
| 779 | |
| 780 // Revert to using the interpreter and clear out the nmethod | |
|
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781 void Method::clear_code() { |
| 0 | 782 |
| 783 // this may be NULL if c2i adapters have not been made yet | |
| 784 // Only should happen at allocate time. | |
| 785 if (_adapter == NULL) { | |
| 786 _from_compiled_entry = NULL; | |
| 787 } else { | |
| 788 _from_compiled_entry = _adapter->get_c2i_entry(); | |
| 789 } | |
| 790 OrderAccess::storestore(); | |
| 791 _from_interpreted_entry = _i2i_entry; | |
| 792 OrderAccess::storestore(); | |
| 793 _code = NULL; | |
| 794 } | |
| 795 | |
| 796 // Called by class data sharing to remove any entry points (which are not shared) | |
|
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797 void Method::unlink_method() { |
| 0 | 798 _code = NULL; |
| 799 _i2i_entry = NULL; | |
| 800 _from_interpreted_entry = NULL; | |
| 801 if (is_native()) { | |
| 802 *native_function_addr() = NULL; | |
| 803 set_signature_handler(NULL); | |
| 804 } | |
| 805 NOT_PRODUCT(set_compiled_invocation_count(0);) | |
| 806 _adapter = NULL; | |
| 807 _from_compiled_entry = NULL; | |
|
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808 |
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809 // In case of DumpSharedSpaces, _method_data should always be NULL. |
|
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810 // |
|
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811 // During runtime (!DumpSharedSpaces), when we are cleaning a |
|
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812 // shared class that failed to load, this->link_method() may |
|
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813 // have already been called (before an exception happened), so |
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814 // this->_method_data may not be NULL. |
|
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815 assert(!DumpSharedSpaces || _method_data == NULL, "unexpected method data?"); |
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816 |
| 0 | 817 set_method_data(NULL); |
|
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|
818 set_method_counters(NULL); |
| 0 | 819 } |
| 820 | |
| 821 // Called when the method_holder is getting linked. Setup entrypoints so the method | |
| 822 // is ready to be called from interpreter, compiler, and vtables. | |
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823 void Method::link_method(methodHandle h_method, TRAPS) { |
| 3748 | 824 // If the code cache is full, we may reenter this function for the |
| 825 // leftover methods that weren't linked. | |
| 826 if (_i2i_entry != NULL) return; | |
| 827 | |
| 0 | 828 assert(_adapter == NULL, "init'd to NULL" ); |
| 829 assert( _code == NULL, "nothing compiled yet" ); | |
| 830 | |
| 831 // Setup interpreter entrypoint | |
| 832 assert(this == h_method(), "wrong h_method()" ); | |
| 833 address entry = Interpreter::entry_for_method(h_method); | |
| 834 assert(entry != NULL, "interpreter entry must be non-null"); | |
| 835 // Sets both _i2i_entry and _from_interpreted_entry | |
| 836 set_interpreter_entry(entry); | |
|
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837 |
|
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|
838 // Don't overwrite already registered native entries. |
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839 if (is_native() && !has_native_function()) { |
| 0 | 840 set_native_function( |
| 841 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
| 842 !native_bind_event_is_interesting); | |
| 843 } | |
| 844 | |
| 845 // Setup compiler entrypoint. This is made eagerly, so we do not need | |
| 846 // special handling of vtables. An alternative is to make adapters more | |
| 847 // lazily by calling make_adapter() from from_compiled_entry() for the | |
| 848 // normal calls. For vtable calls life gets more complicated. When a | |
| 849 // call-site goes mega-morphic we need adapters in all methods which can be | |
| 850 // called from the vtable. We need adapters on such methods that get loaded | |
| 851 // later. Ditto for mega-morphic itable calls. If this proves to be a | |
| 852 // problem we'll make these lazily later. | |
|
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|
853 (void) make_adapters(h_method, CHECK); |
| 0 | 854 |
| 855 // ONLY USE the h_method now as make_adapter may have blocked | |
| 856 | |
| 857 } | |
| 858 | |
|
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859 address Method::make_adapters(methodHandle mh, TRAPS) { |
| 0 | 860 // Adapters for compiled code are made eagerly here. They are fairly |
| 861 // small (generally < 100 bytes) and quick to make (and cached and shared) | |
| 862 // so making them eagerly shouldn't be too expensive. | |
| 863 AdapterHandlerEntry* adapter = AdapterHandlerLibrary::get_adapter(mh); | |
| 864 if (adapter == NULL ) { | |
|
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865 THROW_MSG_NULL(vmSymbols::java_lang_VirtualMachineError(), "out of space in CodeCache for adapters"); |
| 0 | 866 } |
| 867 | |
| 868 mh->set_adapter_entry(adapter); | |
| 869 mh->_from_compiled_entry = adapter->get_c2i_entry(); | |
| 870 return adapter->get_c2i_entry(); | |
| 871 } | |
| 872 | |
| 873 // The verified_code_entry() must be called when a invoke is resolved | |
| 874 // on this method. | |
| 875 | |
| 876 // It returns the compiled code entry point, after asserting not null. | |
| 877 // This function is called after potential safepoints so that nmethod | |
| 878 // or adapter that it points to is still live and valid. | |
| 879 // This function must not hit a safepoint! | |
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880 address Method::verified_code_entry() { |
| 0 | 881 debug_only(No_Safepoint_Verifier nsv;) |
| 1202 | 882 nmethod *code = (nmethod *)OrderAccess::load_ptr_acquire(&_code); |
| 883 if (code == NULL && UseCodeCacheFlushing) { | |
|
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884 nmethod *saved_code = CodeCache::reanimate_saved_code(this); |
| 1202 | 885 if (saved_code != NULL) { |
| 886 methodHandle method(this); | |
| 887 assert( ! saved_code->is_osr_method(), "should not get here for osr" ); | |
| 888 set_code( method, saved_code ); | |
| 889 } | |
| 890 } | |
| 891 | |
| 0 | 892 assert(_from_compiled_entry != NULL, "must be set"); |
| 893 return _from_compiled_entry; | |
| 894 } | |
| 895 | |
| 896 // Check that if an nmethod ref exists, it has a backlink to this or no backlink at all | |
| 897 // (could be racing a deopt). | |
| 898 // Not inline to avoid circular ref. | |
|
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899 bool Method::check_code() const { |
| 0 | 900 // cached in a register or local. There's a race on the value of the field. |
| 901 nmethod *code = (nmethod *)OrderAccess::load_ptr_acquire(&_code); | |
|
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902 return code == NULL || (code->method() == NULL) || (code->method() == (Method*)this && !code->is_osr_method()); |
| 0 | 903 } |
| 904 | |
| 905 // Install compiled code. Instantly it can execute. | |
|
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906 void Method::set_code(methodHandle mh, nmethod *code) { |
| 0 | 907 assert( code, "use clear_code to remove code" ); |
| 908 assert( mh->check_code(), "" ); | |
| 909 | |
| 910 guarantee(mh->adapter() != NULL, "Adapter blob must already exist!"); | |
| 911 | |
| 912 // These writes must happen in this order, because the interpreter will | |
| 913 // directly jump to from_interpreted_entry which jumps to an i2c adapter | |
| 914 // which jumps to _from_compiled_entry. | |
| 915 mh->_code = code; // Assign before allowing compiled code to exec | |
| 916 | |
| 917 int comp_level = code->comp_level(); | |
| 918 // In theory there could be a race here. In practice it is unlikely | |
| 919 // and not worth worrying about. | |
| 1783 | 920 if (comp_level > mh->highest_comp_level()) { |
| 921 mh->set_highest_comp_level(comp_level); | |
| 0 | 922 } |
| 923 | |
| 924 OrderAccess::storestore(); | |
| 1692 | 925 #ifdef SHARK |
|
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926 mh->_from_interpreted_entry = code->insts_begin(); |
|
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927 #else //!SHARK |
| 0 | 928 mh->_from_compiled_entry = code->verified_entry_point(); |
| 929 OrderAccess::storestore(); | |
| 930 // Instantly compiled code can execute. | |
|
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931 if (!mh->is_method_handle_intrinsic()) |
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932 mh->_from_interpreted_entry = mh->get_i2c_entry(); |
|
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933 #endif //!SHARK |
| 0 | 934 } |
| 935 | |
| 936 | |
|
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937 bool Method::is_overridden_in(Klass* k) const { |
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938 InstanceKlass* ik = InstanceKlass::cast(k); |
| 0 | 939 |
| 940 if (ik->is_interface()) return false; | |
| 941 | |
| 942 // If method is an interface, we skip it - except if it | |
| 943 // is a miranda method | |
|
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|
944 if (method_holder()->is_interface()) { |
| 0 | 945 // Check that method is not a miranda method |
| 946 if (ik->lookup_method(name(), signature()) == NULL) { | |
| 947 // No implementation exist - so miranda method | |
| 948 return false; | |
| 949 } | |
| 950 return true; | |
| 951 } | |
| 952 | |
| 953 assert(ik->is_subclass_of(method_holder()), "should be subklass"); | |
| 954 assert(ik->vtable() != NULL, "vtable should exist"); | |
| 955 if (vtable_index() == nonvirtual_vtable_index) { | |
| 956 return false; | |
| 957 } else { | |
|
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958 Method* vt_m = ik->method_at_vtable(vtable_index()); |
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959 return vt_m != this; |
| 0 | 960 } |
| 961 } | |
| 962 | |
| 963 | |
|
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964 // give advice about whether this Method* should be cached or not |
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965 bool Method::should_not_be_cached() const { |
|
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966 if (is_old()) { |
|
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967 // This method has been redefined. It is either EMCP or obsolete |
|
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968 // and we don't want to cache it because that would pin the method |
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969 // down and prevent it from being collectible if and when it |
|
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970 // finishes executing. |
|
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971 return true; |
|
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|
972 } |
|
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973 |
|
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974 // caching this method should be just fine |
|
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|
975 return false; |
|
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|
976 } |
|
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|
977 |
|
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978 |
|
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|
979 /** |
|
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980 * Returns true if this is one of the specially treated methods for |
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981 * security related stack walks (like Reflection.getCallerClass). |
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982 */ |
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983 bool Method::is_ignored_by_security_stack_walk() const { |
|
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984 const bool use_new_reflection = JDK_Version::is_gte_jdk14x_version() && UseNewReflection; |
|
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985 |
|
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|
986 assert(intrinsic_id() != vmIntrinsics::_invoke || Universe::reflect_invoke_cache()->is_same_method((Method*)this), "sanity"); |
|
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987 if (intrinsic_id() == vmIntrinsics::_invoke) { |
|
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988 // This is Method.invoke() -- ignore it |
|
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989 return true; |
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990 } |
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991 if (use_new_reflection && |
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992 method_holder()->is_subclass_of(SystemDictionary::reflect_MethodAccessorImpl_klass())) { |
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993 // This is an auxilary frame -- ignore it |
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994 return true; |
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995 } |
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996 if (is_method_handle_intrinsic() || is_compiled_lambda_form()) { |
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997 // This is an internal adapter frame for method handles -- ignore it |
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998 return true; |
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999 } |
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1000 return false; |
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1001 } |
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1002 |
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1003 |
| 710 | 1004 // Constant pool structure for invoke methods: |
| 1005 enum { | |
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1006 _imcp_invoke_name = 1, // utf8: 'invokeExact', etc. |
|
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1007 _imcp_invoke_signature, // utf8: (variable Symbol*) |
| 710 | 1008 _imcp_limit |
| 1009 }; | |
| 1010 | |
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1011 // Test if this method is an MH adapter frame generated by Java code. |
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1012 // Cf. java/lang/invoke/InvokerBytecodeGenerator |
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1013 bool Method::is_compiled_lambda_form() const { |
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1014 return intrinsic_id() == vmIntrinsics::_compiledLambdaForm; |
| 710 | 1015 } |
| 1016 | |
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1017 // Test if this method is an internal MH primitive method. |
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1018 bool Method::is_method_handle_intrinsic() const { |
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1019 vmIntrinsics::ID iid = intrinsic_id(); |
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1020 return (MethodHandles::is_signature_polymorphic(iid) && |
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1021 MethodHandles::is_signature_polymorphic_intrinsic(iid)); |
|
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1022 } |
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1023 |
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1024 bool Method::has_member_arg() const { |
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1025 vmIntrinsics::ID iid = intrinsic_id(); |
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1026 return (MethodHandles::is_signature_polymorphic(iid) && |
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1027 MethodHandles::has_member_arg(iid)); |
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1028 } |
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1029 |
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1030 // Make an instance of a signature-polymorphic internal MH primitive. |
|
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1031 methodHandle Method::make_method_handle_intrinsic(vmIntrinsics::ID iid, |
|
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1032 Symbol* signature, |
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1033 TRAPS) { |
|
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1034 ResourceMark rm; |
| 710 | 1035 methodHandle empty; |
| 1036 | |
|
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1037 KlassHandle holder = SystemDictionary::MethodHandle_klass(); |
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1038 Symbol* name = MethodHandles::signature_polymorphic_intrinsic_name(iid); |
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1039 assert(iid == MethodHandles::signature_polymorphic_name_id(name), ""); |
| 710 | 1040 if (TraceMethodHandles) { |
|
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1041 tty->print_cr("make_method_handle_intrinsic MH.%s%s", name->as_C_string(), signature->as_C_string()); |
| 710 | 1042 } |
| 1043 | |
|
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1044 // invariant: cp->symbol_at_put is preceded by a refcount increment (more usually a lookup) |
|
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1045 name->increment_refcount(); |
|
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1046 signature->increment_refcount(); |
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1047 |
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1048 int cp_length = _imcp_limit; |
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1049 ClassLoaderData* loader_data = holder->class_loader_data(); |
| 710 | 1050 constantPoolHandle cp; |
| 1051 { | |
|
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1052 ConstantPool* cp_oop = ConstantPool::allocate(loader_data, cp_length, CHECK_(empty)); |
| 710 | 1053 cp = constantPoolHandle(THREAD, cp_oop); |
| 1054 } | |
|
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1055 cp->set_pool_holder(InstanceKlass::cast(holder())); |
|
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1056 cp->symbol_at_put(_imcp_invoke_name, name); |
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1057 cp->symbol_at_put(_imcp_invoke_signature, signature); |
|
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1058 cp->set_has_preresolution(); |
| 710 | 1059 |
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1060 // decide on access bits: public or not? |
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1061 int flags_bits = (JVM_ACC_NATIVE | JVM_ACC_SYNTHETIC | JVM_ACC_FINAL); |
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1062 bool must_be_static = MethodHandles::is_signature_polymorphic_static(iid); |
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1063 if (must_be_static) flags_bits |= JVM_ACC_STATIC; |
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1064 assert((flags_bits & JVM_ACC_PUBLIC) == 0, "do not expose these methods"); |
|
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1065 |
| 710 | 1066 methodHandle m; |
| 1067 { | |
| 8031 | 1068 InlineTableSizes sizes; |
|
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1069 Method* m_oop = Method::allocate(loader_data, 0, |
| 8031 | 1070 accessFlags_from(flags_bits), &sizes, |
|
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1071 ConstMethod::NORMAL, CHECK_(empty)); |
| 710 | 1072 m = methodHandle(THREAD, m_oop); |
| 1073 } | |
| 1074 m->set_constants(cp()); | |
| 1075 m->set_name_index(_imcp_invoke_name); | |
| 1076 m->set_signature_index(_imcp_invoke_signature); | |
|
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1077 assert(MethodHandles::is_signature_polymorphic_name(m->name()), ""); |
|
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1078 assert(m->signature() == signature, ""); |
| 710 | 1079 #ifdef CC_INTERP |
|
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1080 ResultTypeFinder rtf(signature); |
| 710 | 1081 m->set_result_index(rtf.type()); |
| 1082 #endif | |
| 1083 m->compute_size_of_parameters(THREAD); | |
|
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1084 m->init_intrinsic_id(); |
|
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1085 assert(m->is_method_handle_intrinsic(), ""); |
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1086 #ifdef ASSERT |
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1087 if (!MethodHandles::is_signature_polymorphic(m->intrinsic_id())) m->print(); |
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1088 assert(MethodHandles::is_signature_polymorphic(m->intrinsic_id()), "must be an invoker"); |
|
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1089 assert(m->intrinsic_id() == iid, "correctly predicted iid"); |
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1090 #endif //ASSERT |
| 710 | 1091 |
| 1092 // Finally, set up its entry points. | |
| 1093 assert(m->can_be_statically_bound(), ""); | |
|
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1094 m->set_vtable_index(Method::nonvirtual_vtable_index); |
| 710 | 1095 m->link_method(m, CHECK_(empty)); |
| 1096 | |
|
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1097 if (TraceMethodHandles && (Verbose || WizardMode)) |
| 710 | 1098 m->print_on(tty); |
| 1099 | |
| 1100 return m; | |
| 1101 } | |
| 1102 | |
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1103 Klass* Method::check_non_bcp_klass(Klass* klass) { |
| 6983 | 1104 if (klass != NULL && klass->class_loader() != NULL) { |
| 1105 if (klass->oop_is_objArray()) | |
|
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1106 klass = ObjArrayKlass::cast(klass)->bottom_klass(); |
|
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1107 return klass; |
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1108 } |
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1109 return NULL; |
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1110 } |
| 710 | 1111 |
|
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1112 |
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1113 methodHandle Method::clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length, |
| 0 | 1114 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS) { |
| 1115 // Code below does not work for native methods - they should never get rewritten anyway | |
| 1116 assert(!m->is_native(), "cannot rewrite native methods"); | |
|
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1117 // Allocate new Method* |
| 0 | 1118 AccessFlags flags = m->access_flags(); |
| 8031 | 1119 |
| 1120 ConstMethod* cm = m->constMethod(); | |
| 1121 int checked_exceptions_len = cm->checked_exceptions_length(); | |
| 1122 int localvariable_len = cm->localvariable_table_length(); | |
| 1123 int exception_table_len = cm->exception_table_length(); | |
| 1124 int method_parameters_len = cm->method_parameters_length(); | |
| 1125 int method_annotations_len = cm->method_annotations_length(); | |
| 1126 int parameter_annotations_len = cm->parameter_annotations_length(); | |
| 1127 int type_annotations_len = cm->type_annotations_length(); | |
| 1128 int default_annotations_len = cm->default_annotations_length(); | |
| 1129 | |
| 1130 InlineTableSizes sizes( | |
| 1131 localvariable_len, | |
| 1132 new_compressed_linenumber_size, | |
| 1133 exception_table_len, | |
| 1134 checked_exceptions_len, | |
| 1135 method_parameters_len, | |
| 1136 cm->generic_signature_index(), | |
| 1137 method_annotations_len, | |
| 1138 parameter_annotations_len, | |
| 1139 type_annotations_len, | |
| 1140 default_annotations_len, | |
| 1141 0); | |
|
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1142 |
| 6934 | 1143 ClassLoaderData* loader_data = m->method_holder()->class_loader_data(); |
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1144 Method* newm_oop = Method::allocate(loader_data, |
| 6934 | 1145 new_code_length, |
| 1146 flags, | |
| 8031 | 1147 &sizes, |
| 6934 | 1148 m->method_type(), |
| 1149 CHECK_(methodHandle())); | |
| 0 | 1150 methodHandle newm (THREAD, newm_oop); |
| 1151 int new_method_size = newm->method_size(); | |
|
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1152 |
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1153 // Create a shallow copy of Method part, but be careful to preserve the new ConstMethod* |
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1154 ConstMethod* newcm = newm->constMethod(); |
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1155 int new_const_method_size = newm->constMethod()->size(); |
|
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1156 |
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1157 memcpy(newm(), m(), sizeof(Method)); |
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1158 |
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1159 // Create shallow copy of ConstMethod. |
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1160 memcpy(newcm, m->constMethod(), sizeof(ConstMethod)); |
|
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1161 |
| 0 | 1162 // Reset correct method/const method, method size, and parameter info |
| 1163 newm->set_constMethod(newcm); | |
| 1164 newm->constMethod()->set_code_size(new_code_length); | |
| 1165 newm->constMethod()->set_constMethod_size(new_const_method_size); | |
| 1166 newm->set_method_size(new_method_size); | |
| 1167 assert(newm->code_size() == new_code_length, "check"); | |
|
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|
1168 assert(newm->method_parameters_length() == method_parameters_len, "check"); |
| 0 | 1169 assert(newm->checked_exceptions_length() == checked_exceptions_len, "check"); |
|
6216
161ae369407d
7181632: nsk classLoad001_14 failure and CompileTheWorld crash after 7178145.
jiangli
parents:
6213
diff
changeset
|
1170 assert(newm->exception_table_length() == exception_table_len, "check"); |
| 0 | 1171 assert(newm->localvariable_table_length() == localvariable_len, "check"); |
| 1172 // Copy new byte codes | |
| 1173 memcpy(newm->code_base(), new_code, new_code_length); | |
| 1174 // Copy line number table | |
| 1175 if (new_compressed_linenumber_size > 0) { | |
| 1176 memcpy(newm->compressed_linenumber_table(), | |
| 1177 new_compressed_linenumber_table, | |
| 1178 new_compressed_linenumber_size); | |
| 1179 } | |
|
11159
16511b7e3d35
8019632: Method parameters are not copied in clone_with_new_data
emc
parents:
11034
diff
changeset
|
1180 // Copy method_parameters |
|
16511b7e3d35
8019632: Method parameters are not copied in clone_with_new_data
emc
parents:
11034
diff
changeset
|
1181 if (method_parameters_len > 0) { |
|
16511b7e3d35
8019632: Method parameters are not copied in clone_with_new_data
emc
parents:
11034
diff
changeset
|
1182 memcpy(newm->method_parameters_start(), |
|
16511b7e3d35
8019632: Method parameters are not copied in clone_with_new_data
emc
parents:
11034
diff
changeset
|
1183 m->method_parameters_start(), |
|
16511b7e3d35
8019632: Method parameters are not copied in clone_with_new_data
emc
parents:
11034
diff
changeset
|
1184 method_parameters_len * sizeof(MethodParametersElement)); |
|
16511b7e3d35
8019632: Method parameters are not copied in clone_with_new_data
emc
parents:
11034
diff
changeset
|
1185 } |
| 0 | 1186 // Copy checked_exceptions |
| 1187 if (checked_exceptions_len > 0) { | |
| 1188 memcpy(newm->checked_exceptions_start(), | |
| 1189 m->checked_exceptions_start(), | |
| 1190 checked_exceptions_len * sizeof(CheckedExceptionElement)); | |
| 1191 } | |
|
6216
161ae369407d
7181632: nsk classLoad001_14 failure and CompileTheWorld crash after 7178145.
jiangli
parents:
6213
diff
changeset
|
1192 // Copy exception table |
|
161ae369407d
7181632: nsk classLoad001_14 failure and CompileTheWorld crash after 7178145.
jiangli
parents:
6213
diff
changeset
|
1193 if (exception_table_len > 0) { |
|
161ae369407d
7181632: nsk classLoad001_14 failure and CompileTheWorld crash after 7178145.
jiangli
parents:
6213
diff
changeset
|
1194 memcpy(newm->exception_table_start(), |
|
161ae369407d
7181632: nsk classLoad001_14 failure and CompileTheWorld crash after 7178145.
jiangli
parents:
6213
diff
changeset
|
1195 m->exception_table_start(), |
|
161ae369407d
7181632: nsk classLoad001_14 failure and CompileTheWorld crash after 7178145.
jiangli
parents:
6213
diff
changeset
|
1196 exception_table_len * sizeof(ExceptionTableElement)); |
|
161ae369407d
7181632: nsk classLoad001_14 failure and CompileTheWorld crash after 7178145.
jiangli
parents:
6213
diff
changeset
|
1197 } |
| 0 | 1198 // Copy local variable number table |
| 1199 if (localvariable_len > 0) { | |
| 1200 memcpy(newm->localvariable_table_start(), | |
| 1201 m->localvariable_table_start(), | |
| 1202 localvariable_len * sizeof(LocalVariableTableElement)); | |
| 1203 } | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6267
diff
changeset
|
1204 // Copy stackmap table |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6267
diff
changeset
|
1205 if (m->has_stackmap_table()) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6267
diff
changeset
|
1206 int code_attribute_length = m->stackmap_data()->length(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6267
diff
changeset
|
1207 Array<u1>* stackmap_data = |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6267
diff
changeset
|
1208 MetadataFactory::new_array<u1>(loader_data, code_attribute_length, 0, CHECK_NULL); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6267
diff
changeset
|
1209 memcpy((void*)stackmap_data->adr_at(0), |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6267
diff
changeset
|
1210 (void*)m->stackmap_data()->adr_at(0), code_attribute_length); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
1211 newm->set_stackmap_data(stackmap_data); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6267
diff
changeset
|
1212 } |
|
518
0af8b0718fc9
6692899: CMS: many vm.parallel_class_loading tests fail with assert "missing Printezis mark"
jmasa
parents:
196
diff
changeset
|
1213 |
|
8837
0c3ee6f1fa23
8009531: Crash when redefining class with annotated method
coleenp
parents:
8751
diff
changeset
|
1214 // copy annotations over to new method |
|
0c3ee6f1fa23
8009531: Crash when redefining class with annotated method
coleenp
parents:
8751
diff
changeset
|
1215 newcm->copy_annotations_from(cm); |
| 0 | 1216 return newm; |
| 1217 } | |
| 1218 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6267
diff
changeset
|
1219 vmSymbols::SID Method::klass_id_for_intrinsics(Klass* holder) { |
| 0 | 1220 // if loader is not the default loader (i.e., != NULL), we can't know the intrinsics |
| 1221 // because we are not loading from core libraries | |
| 6894 | 1222 // exception: the AES intrinsics come from lib/ext/sunjce_provider.jar |
| 1223 // which does not use the class default class loader so we check for its loader here | |
|
8866
16885e702c88
7198429: need checked categorization of caller-sensitive methods in the JDK
twisti
parents:
8751
diff
changeset
|
1224 InstanceKlass* ik = InstanceKlass::cast(holder); |
|
16885e702c88
7198429: need checked categorization of caller-sensitive methods in the JDK
twisti
parents:
8751
diff
changeset
|
1225 if ((ik->class_loader() != NULL) && !SystemDictionary::is_ext_class_loader(ik->class_loader())) { |
|
856
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
726
diff
changeset
|
1226 return vmSymbols::NO_SID; // regardless of name, no intrinsics here |
| 6894 | 1227 } |
| 0 | 1228 |
| 1229 // see if the klass name is well-known: | |
|
8866
16885e702c88
7198429: need checked categorization of caller-sensitive methods in the JDK
twisti
parents:
8751
diff
changeset
|
1230 Symbol* klass_name = ik->name(); |
|
856
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
726
diff
changeset
|
1231 return vmSymbols::find_sid(klass_name); |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
726
diff
changeset
|
1232 } |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
726
diff
changeset
|
1233 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6267
diff
changeset
|
1234 void Method::init_intrinsic_id() { |
|
856
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
726
diff
changeset
|
1235 assert(_intrinsic_id == vmIntrinsics::_none, "do this just once"); |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
726
diff
changeset
|
1236 const uintptr_t max_id_uint = right_n_bits((int)(sizeof(_intrinsic_id) * BitsPerByte)); |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
726
diff
changeset
|
1237 assert((uintptr_t)vmIntrinsics::ID_LIMIT <= max_id_uint, "else fix size"); |
|
1793
d257356e35f0
6939224: MethodHandle.invokeGeneric needs to perform the correct set of conversions
jrose
parents:
1783
diff
changeset
|
1238 assert(intrinsic_id_size_in_bytes() == sizeof(_intrinsic_id), ""); |
|
856
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
726
diff
changeset
|
1239 |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
726
diff
changeset
|
1240 // the klass name is well-known: |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
726
diff
changeset
|
1241 vmSymbols::SID klass_id = klass_id_for_intrinsics(method_holder()); |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
726
diff
changeset
|
1242 assert(klass_id != vmSymbols::NO_SID, "caller responsibility"); |
| 0 | 1243 |
| 1244 // ditto for method and signature: | |
| 1245 vmSymbols::SID name_id = vmSymbols::find_sid(name()); | |
|
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6216
diff
changeset
|
1246 if (klass_id != vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_MethodHandle) |
|
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6216
diff
changeset
|
1247 && name_id == vmSymbols::NO_SID) |
|
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6216
diff
changeset
|
1248 return; |
| 0 | 1249 vmSymbols::SID sig_id = vmSymbols::find_sid(signature()); |
|
2357
8033953d67ff
7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents:
2356
diff
changeset
|
1250 if (klass_id != vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_MethodHandle) |
|
1793
d257356e35f0
6939224: MethodHandle.invokeGeneric needs to perform the correct set of conversions
jrose
parents:
1783
diff
changeset
|
1251 && sig_id == vmSymbols::NO_SID) return; |
| 0 | 1252 jshort flags = access_flags().as_short(); |
| 1253 | |
|
856
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
726
diff
changeset
|
1254 vmIntrinsics::ID id = vmIntrinsics::find_id(klass_id, name_id, sig_id, flags); |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
726
diff
changeset
|
1255 if (id != vmIntrinsics::_none) { |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
726
diff
changeset
|
1256 set_intrinsic_id(id); |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
726
diff
changeset
|
1257 return; |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
726
diff
changeset
|
1258 } |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
726
diff
changeset
|
1259 |
| 0 | 1260 // A few slightly irregular cases: |
| 1261 switch (klass_id) { | |
| 1262 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_StrictMath): | |
| 1263 // Second chance: check in regular Math. | |
| 1264 switch (name_id) { | |
| 1265 case vmSymbols::VM_SYMBOL_ENUM_NAME(min_name): | |
| 1266 case vmSymbols::VM_SYMBOL_ENUM_NAME(max_name): | |
| 1267 case vmSymbols::VM_SYMBOL_ENUM_NAME(sqrt_name): | |
| 1268 // pretend it is the corresponding method in the non-strict class: | |
| 1269 klass_id = vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_Math); | |
|
856
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
726
diff
changeset
|
1270 id = vmIntrinsics::find_id(klass_id, name_id, sig_id, flags); |
| 0 | 1271 break; |
| 1272 } | |
|
1507
cd5dbf694d45
6939134: JSR 292 adjustments to method handle invocation
jrose
parents:
1506
diff
changeset
|
1273 break; |
|
cd5dbf694d45
6939134: JSR 292 adjustments to method handle invocation
jrose
parents:
1506
diff
changeset
|
1274 |
|
cd5dbf694d45
6939134: JSR 292 adjustments to method handle invocation
jrose
parents:
1506
diff
changeset
|
1275 // Signature-polymorphic methods: MethodHandle.invoke*, InvokeDynamic.*. |
|
2357
8033953d67ff
7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents:
2356
diff
changeset
|
1276 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_MethodHandle): |
|
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6216
diff
changeset
|
1277 if (!is_native()) break; |
|
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6216
diff
changeset
|
1278 id = MethodHandles::signature_polymorphic_name_id(method_holder(), name()); |
|
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6216
diff
changeset
|
1279 if (is_static() != MethodHandles::is_signature_polymorphic_static(id)) |
|
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6216
diff
changeset
|
1280 id = vmIntrinsics::_none; |
|
1507
cd5dbf694d45
6939134: JSR 292 adjustments to method handle invocation
jrose
parents:
1506
diff
changeset
|
1281 break; |
| 0 | 1282 } |
| 1283 | |
|
856
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
726
diff
changeset
|
1284 if (id != vmIntrinsics::_none) { |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
726
diff
changeset
|
1285 // Set up its iid. It is an alias method. |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
726
diff
changeset
|
1286 set_intrinsic_id(id); |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
726
diff
changeset
|
1287 return; |
|
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
726
diff
changeset
|
1288 } |
| 0 | 1289 } |
| 1290 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6267
diff
changeset
|
1291 // These two methods are static since a GC may move the Method |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6267
diff
changeset
|
1292 bool Method::load_signature_classes(methodHandle m, TRAPS) { |
|
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6216
diff
changeset
|
1293 if (THREAD->is_Compiler_thread()) { |
|
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6216
diff
changeset
|
1294 // There is nothing useful this routine can do from within the Compile thread. |
|
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6216
diff
changeset
|
1295 // Hopefully, the signature contains only well-known classes. |
|
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6216
diff
changeset
|
1296 // We could scan for this and return true/false, but the caller won't care. |
|
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6216
diff
changeset
|
1297 return false; |
|
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6216
diff
changeset
|
1298 } |
| 0 | 1299 bool sig_is_loaded = true; |
|
6940
18fb7da42534
8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
coleenp
parents:
6935
diff
changeset
|
1300 Handle class_loader(THREAD, m->method_holder()->class_loader()); |
|
18fb7da42534
8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
coleenp
parents:
6935
diff
changeset
|
1301 Handle protection_domain(THREAD, m->method_holder()->protection_domain()); |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1302 ResourceMark rm(THREAD); |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1303 Symbol* signature = m->signature(); |
| 0 | 1304 for(SignatureStream ss(signature); !ss.is_done(); ss.next()) { |
| 1305 if (ss.is_object()) { | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1306 Symbol* sym = ss.as_symbol(CHECK_(false)); |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1307 Symbol* name = sym; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6267
diff
changeset
|
1308 Klass* klass = SystemDictionary::resolve_or_null(name, class_loader, |
| 0 | 1309 protection_domain, THREAD); |
|
104
541929da62d2
6624474: Server compiler generates unexpected LinkageError
rasbold
parents:
48
diff
changeset
|
1310 // We are loading classes eagerly. If a ClassNotFoundException or |
|
541929da62d2
6624474: Server compiler generates unexpected LinkageError
rasbold
parents:
48
diff
changeset
|
1311 // a LinkageError was generated, be sure to ignore it. |
| 0 | 1312 if (HAS_PENDING_EXCEPTION) { |
| 1142 | 1313 if (PENDING_EXCEPTION->is_a(SystemDictionary::ClassNotFoundException_klass()) || |
| 1314 PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) { | |
| 0 | 1315 CLEAR_PENDING_EXCEPTION; |
| 1316 } else { | |
| 1317 return false; | |
| 1318 } | |
| 1319 } | |
| 1320 if( klass == NULL) { sig_is_loaded = false; } | |
| 1321 } | |
| 1322 } | |
| 1323 return sig_is_loaded; | |
| 1324 } | |
| 1325 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6267
diff
changeset
|
1326 bool Method::has_unloaded_classes_in_signature(methodHandle m, TRAPS) { |
|
6940
18fb7da42534
8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
coleenp
parents:
6935
diff
changeset
|
1327 Handle class_loader(THREAD, m->method_holder()->class_loader()); |
|
18fb7da42534
8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
coleenp
parents:
6935
diff
changeset
|
1328 Handle protection_domain(THREAD, m->method_holder()->protection_domain()); |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1329 ResourceMark rm(THREAD); |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1330 Symbol* signature = m->signature(); |
| 0 | 1331 for(SignatureStream ss(signature); !ss.is_done(); ss.next()) { |
| 1332 if (ss.type() == T_OBJECT) { | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1333 Symbol* name = ss.as_symbol_or_null(); |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
1334 if (name == NULL) return true; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6267
diff
changeset
|
1335 Klass* klass = SystemDictionary::find(name, class_loader, protection_domain, THREAD); |
| 0 | 1336 if (klass == NULL) return true; |
| 1337 } | |
| 1338 } | |
| 1339 return false; | |
| 1340 } | |
| 1341 | |
| 1342 // Exposed so field engineers can debug VM | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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1343 void Method::print_short_name(outputStream* st) { |
| 0 | 1344 ResourceMark rm; |
| 1345 #ifdef PRODUCT | |
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1346 st->print(" %s::", method_holder()->external_name()); |
| 0 | 1347 #else |
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1348 st->print(" %s::", method_holder()->internal_name()); |
| 0 | 1349 #endif |
| 1350 name()->print_symbol_on(st); | |
| 1351 if (WizardMode) signature()->print_symbol_on(st); | |
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1352 else if (MethodHandles::is_signature_polymorphic(intrinsic_id())) |
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1353 MethodHandles::print_as_basic_type_signature_on(st, signature(), true); |
| 0 | 1354 } |
| 1355 | |
| 3779 | 1356 // Comparer for sorting an object array containing |
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1357 // Method*s. |
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1358 static int method_comparator(Method* a, Method* b) { |
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1359 return a->name()->fast_compare(b->name()); |
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1360 } |
| 0 | 1361 |
| 1362 // This is only done during class loading, so it is OK to assume method_idnum matches the methods() array | |
| 8031 | 1363 void Method::sort_methods(Array<Method*>* methods, bool idempotent) { |
| 0 | 1364 int length = methods->length(); |
| 1365 if (length > 1) { | |
| 3779 | 1366 { |
| 1367 No_Safepoint_Verifier nsv; | |
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1368 QuickSort::sort<Method*>(methods->data(), length, method_comparator, idempotent); |
| 0 | 1369 } |
| 1370 // Reset method ordering | |
| 1371 for (int i = 0; i < length; i++) { | |
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1372 Method* m = methods->at(i); |
| 0 | 1373 m->set_method_idnum(i); |
| 1374 } | |
| 1375 } | |
| 1376 } | |
| 1377 | |
| 1378 | |
| 1379 //----------------------------------------------------------------------------------- | |
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1380 // Non-product code unless JVM/TI needs it |
| 0 | 1381 |
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1382 #if !defined(PRODUCT) || INCLUDE_JVMTI |
| 0 | 1383 class SignatureTypePrinter : public SignatureTypeNames { |
| 1384 private: | |
| 1385 outputStream* _st; | |
| 1386 bool _use_separator; | |
| 1387 | |
| 1388 void type_name(const char* name) { | |
| 1389 if (_use_separator) _st->print(", "); | |
| 1390 _st->print(name); | |
| 1391 _use_separator = true; | |
| 1392 } | |
| 1393 | |
| 1394 public: | |
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1395 SignatureTypePrinter(Symbol* signature, outputStream* st) : SignatureTypeNames(signature) { |
| 0 | 1396 _st = st; |
| 1397 _use_separator = false; | |
| 1398 } | |
| 1399 | |
| 1400 void print_parameters() { _use_separator = false; iterate_parameters(); } | |
| 1401 void print_returntype() { _use_separator = false; iterate_returntype(); } | |
| 1402 }; | |
| 1403 | |
| 1404 | |
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1405 void Method::print_name(outputStream* st) { |
| 0 | 1406 Thread *thread = Thread::current(); |
| 1407 ResourceMark rm(thread); | |
| 1408 SignatureTypePrinter sig(signature(), st); | |
| 1409 st->print("%s ", is_static() ? "static" : "virtual"); | |
| 1410 sig.print_returntype(); | |
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1411 st->print(" %s.", method_holder()->internal_name()); |
| 0 | 1412 name()->print_symbol_on(st); |
| 1413 st->print("("); | |
| 1414 sig.print_parameters(); | |
| 1415 st->print(")"); | |
| 1416 } | |
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1417 #endif // !PRODUCT || INCLUDE_JVMTI |
| 0 | 1418 |
| 1419 | |
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1420 //----------------------------------------------------------------------------------- |
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1421 // Non-product code |
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1422 |
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1423 #ifndef PRODUCT |
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1424 void Method::print_codes_on(outputStream* st) const { |
| 0 | 1425 print_codes_on(0, code_size(), st); |
| 1426 } | |
| 1427 | |
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1428 void Method::print_codes_on(int from, int to, outputStream* st) const { |
| 0 | 1429 Thread *thread = Thread::current(); |
| 1430 ResourceMark rm(thread); | |
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1431 methodHandle mh (thread, (Method*)this); |
| 0 | 1432 BytecodeStream s(mh); |
| 1433 s.set_interval(from, to); | |
| 1434 BytecodeTracer::set_closure(BytecodeTracer::std_closure()); | |
| 1435 while (s.next() >= 0) BytecodeTracer::trace(mh, s.bcp(), st); | |
| 1436 } | |
| 1437 #endif // not PRODUCT | |
| 1438 | |
| 1439 | |
| 1440 // Simple compression of line number tables. We use a regular compressed stream, except that we compress deltas | |
| 1441 // between (bci,line) pairs since they are smaller. If (bci delta, line delta) fits in (5-bit unsigned, 3-bit unsigned) | |
| 1442 // we save it as one byte, otherwise we write a 0xFF escape character and use regular compression. 0x0 is used | |
| 1443 // as end-of-stream terminator. | |
| 1444 | |
| 1445 void CompressedLineNumberWriteStream::write_pair_regular(int bci_delta, int line_delta) { | |
| 1446 // bci and line number does not compress into single byte. | |
| 1447 // Write out escape character and use regular compression for bci and line number. | |
| 1448 write_byte((jubyte)0xFF); | |
| 1449 write_signed_int(bci_delta); | |
| 1450 write_signed_int(line_delta); | |
| 1451 } | |
| 1452 | |
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1453 // See comment in method.hpp which explains why this exists. |
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1454 #if defined(_M_AMD64) && _MSC_VER >= 1400 |
| 0 | 1455 #pragma optimize("", off) |
| 1456 void CompressedLineNumberWriteStream::write_pair(int bci, int line) { | |
| 1457 write_pair_inline(bci, line); | |
| 1458 } | |
| 1459 #pragma optimize("", on) | |
| 1460 #endif | |
| 1461 | |
| 1462 CompressedLineNumberReadStream::CompressedLineNumberReadStream(u_char* buffer) : CompressedReadStream(buffer) { | |
| 1463 _bci = 0; | |
| 1464 _line = 0; | |
| 1465 }; | |
| 1466 | |
| 1467 | |
| 1468 bool CompressedLineNumberReadStream::read_pair() { | |
| 1469 jubyte next = read_byte(); | |
| 1470 // Check for terminator | |
| 1471 if (next == 0) return false; | |
| 1472 if (next == 0xFF) { | |
| 1473 // Escape character, regular compression used | |
| 1474 _bci += read_signed_int(); | |
| 1475 _line += read_signed_int(); | |
| 1476 } else { | |
| 1477 // Single byte compression used | |
| 1478 _bci += next >> 3; | |
| 1479 _line += next & 0x7; | |
| 1480 } | |
| 1481 return true; | |
| 1482 } | |
| 1483 | |
| 1484 | |
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1485 Bytecodes::Code Method::orig_bytecode_at(int bci) const { |
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1486 BreakpointInfo* bp = method_holder()->breakpoints(); |
| 0 | 1487 for (; bp != NULL; bp = bp->next()) { |
| 1488 if (bp->match(this, bci)) { | |
| 1489 return bp->orig_bytecode(); | |
| 1490 } | |
| 1491 } | |
| 1492 ShouldNotReachHere(); | |
| 1493 return Bytecodes::_shouldnotreachhere; | |
| 1494 } | |
| 1495 | |
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1496 void Method::set_orig_bytecode_at(int bci, Bytecodes::Code code) { |
| 0 | 1497 assert(code != Bytecodes::_breakpoint, "cannot patch breakpoints this way"); |
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1498 BreakpointInfo* bp = method_holder()->breakpoints(); |
| 0 | 1499 for (; bp != NULL; bp = bp->next()) { |
| 1500 if (bp->match(this, bci)) { | |
| 1501 bp->set_orig_bytecode(code); | |
| 1502 // and continue, in case there is more than one | |
| 1503 } | |
| 1504 } | |
| 1505 } | |
| 1506 | |
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1507 void Method::set_breakpoint(int bci) { |
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1508 InstanceKlass* ik = method_holder(); |
| 0 | 1509 BreakpointInfo *bp = new BreakpointInfo(this, bci); |
| 1510 bp->set_next(ik->breakpoints()); | |
| 1511 ik->set_breakpoints(bp); | |
| 1512 // do this last: | |
| 1513 bp->set(this); | |
| 1514 } | |
| 1515 | |
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1516 static void clear_matches(Method* m, int bci) { |
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1517 InstanceKlass* ik = m->method_holder(); |
| 0 | 1518 BreakpointInfo* prev_bp = NULL; |
| 1519 BreakpointInfo* next_bp; | |
| 1520 for (BreakpointInfo* bp = ik->breakpoints(); bp != NULL; bp = next_bp) { | |
| 1521 next_bp = bp->next(); | |
| 1522 // bci value of -1 is used to delete all breakpoints in method m (ex: clear_all_breakpoint). | |
| 1523 if (bci >= 0 ? bp->match(m, bci) : bp->match(m)) { | |
| 1524 // do this first: | |
| 1525 bp->clear(m); | |
| 1526 // unhook it | |
| 1527 if (prev_bp != NULL) | |
| 1528 prev_bp->set_next(next_bp); | |
| 1529 else | |
| 1530 ik->set_breakpoints(next_bp); | |
| 1531 delete bp; | |
| 1532 // When class is redefined JVMTI sets breakpoint in all versions of EMCP methods | |
| 1533 // at same location. So we have multiple matching (method_index and bci) | |
| 1534 // BreakpointInfo nodes in BreakpointInfo list. We should just delete one | |
| 1535 // breakpoint for clear_breakpoint request and keep all other method versions | |
| 1536 // BreakpointInfo for future clear_breakpoint request. | |
| 1537 // bcivalue of -1 is used to clear all breakpoints (see clear_all_breakpoints) | |
| 1538 // which is being called when class is unloaded. We delete all the Breakpoint | |
| 1539 // information for all versions of method. We may not correctly restore the original | |
| 1540 // bytecode in all method versions, but that is ok. Because the class is being unloaded | |
| 1541 // so these methods won't be used anymore. | |
| 1542 if (bci >= 0) { | |
| 1543 break; | |
| 1544 } | |
| 1545 } else { | |
| 1546 // This one is a keeper. | |
| 1547 prev_bp = bp; | |
| 1548 } | |
| 1549 } | |
| 1550 } | |
| 1551 | |
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1552 void Method::clear_breakpoint(int bci) { |
| 0 | 1553 assert(bci >= 0, ""); |
| 1554 clear_matches(this, bci); | |
| 1555 } | |
| 1556 | |
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1557 void Method::clear_all_breakpoints() { |
| 0 | 1558 clear_matches(this, -1); |
| 1559 } | |
| 1560 | |
| 1561 | |
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1562 int Method::invocation_count() { |
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1563 MethodCounters *mcs = method_counters(); |
| 1783 | 1564 if (TieredCompilation) { |
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1565 MethodData* const mdo = method_data(); |
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1566 if (((mcs != NULL) ? mcs->invocation_counter()->carry() : false) || |
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1567 ((mdo != NULL) ? mdo->invocation_counter()->carry() : false)) { |
| 1783 | 1568 return InvocationCounter::count_limit; |
| 1569 } else { | |
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1570 return ((mcs != NULL) ? mcs->invocation_counter()->count() : 0) + |
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1571 ((mdo != NULL) ? mdo->invocation_counter()->count() : 0); |
| 1783 | 1572 } |
| 1573 } else { | |
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1574 return (mcs == NULL) ? 0 : mcs->invocation_counter()->count(); |
| 1783 | 1575 } |
| 1576 } | |
| 1577 | |
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1578 int Method::backedge_count() { |
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1579 MethodCounters *mcs = method_counters(); |
| 1783 | 1580 if (TieredCompilation) { |
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1581 MethodData* const mdo = method_data(); |
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1582 if (((mcs != NULL) ? mcs->backedge_counter()->carry() : false) || |
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1583 ((mdo != NULL) ? mdo->backedge_counter()->carry() : false)) { |
| 1783 | 1584 return InvocationCounter::count_limit; |
| 1585 } else { | |
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1586 return ((mcs != NULL) ? mcs->backedge_counter()->count() : 0) + |
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1587 ((mdo != NULL) ? mdo->backedge_counter()->count() : 0); |
| 1783 | 1588 } |
| 1589 } else { | |
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1590 return (mcs == NULL) ? 0 : mcs->backedge_counter()->count(); |
| 1783 | 1591 } |
| 1592 } | |
| 1593 | |
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1594 int Method::highest_comp_level() const { |
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1595 const MethodData* mdo = method_data(); |
| 1783 | 1596 if (mdo != NULL) { |
| 1597 return mdo->highest_comp_level(); | |
| 1598 } else { | |
| 1599 return CompLevel_none; | |
| 1600 } | |
| 1601 } | |
| 1602 | |
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1603 int Method::highest_osr_comp_level() const { |
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1604 const MethodData* mdo = method_data(); |
| 1783 | 1605 if (mdo != NULL) { |
| 1606 return mdo->highest_osr_comp_level(); | |
| 1607 } else { | |
| 1608 return CompLevel_none; | |
| 1609 } | |
| 1610 } | |
| 1611 | |
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1612 void Method::set_highest_comp_level(int level) { |
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1613 MethodData* mdo = method_data(); |
| 1783 | 1614 if (mdo != NULL) { |
| 1615 mdo->set_highest_comp_level(level); | |
| 1616 } | |
| 1617 } | |
| 1618 | |
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1619 void Method::set_highest_osr_comp_level(int level) { |
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1620 MethodData* mdo = method_data(); |
| 1783 | 1621 if (mdo != NULL) { |
| 1622 mdo->set_highest_osr_comp_level(level); | |
| 1623 } | |
| 1624 } | |
| 1625 | |
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1626 BreakpointInfo::BreakpointInfo(Method* m, int bci) { |
| 0 | 1627 _bci = bci; |
| 1628 _name_index = m->name_index(); | |
| 1629 _signature_index = m->signature_index(); | |
| 1630 _orig_bytecode = (Bytecodes::Code) *m->bcp_from(_bci); | |
| 1631 if (_orig_bytecode == Bytecodes::_breakpoint) | |
| 1632 _orig_bytecode = m->orig_bytecode_at(_bci); | |
| 1633 _next = NULL; | |
| 1634 } | |
| 1635 | |
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1636 void BreakpointInfo::set(Method* method) { |
| 0 | 1637 #ifdef ASSERT |
| 1638 { | |
| 1639 Bytecodes::Code code = (Bytecodes::Code) *method->bcp_from(_bci); | |
| 1640 if (code == Bytecodes::_breakpoint) | |
| 1641 code = method->orig_bytecode_at(_bci); | |
| 1642 assert(orig_bytecode() == code, "original bytecode must be the same"); | |
| 1643 } | |
| 1644 #endif | |
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1645 Thread *thread = Thread::current(); |
| 0 | 1646 *method->bcp_from(_bci) = Bytecodes::_breakpoint; |
|
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1647 method->incr_number_of_breakpoints(thread); |
| 0 | 1648 SystemDictionary::notice_modification(); |
| 1649 { | |
| 1650 // Deoptimize all dependents on this method | |
| 1651 HandleMark hm(thread); | |
| 1652 methodHandle mh(thread, method); | |
| 1653 Universe::flush_dependents_on_method(mh); | |
| 1654 } | |
| 1655 } | |
| 1656 | |
|
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1657 void BreakpointInfo::clear(Method* method) { |
| 0 | 1658 *method->bcp_from(_bci) = orig_bytecode(); |
| 1659 assert(method->number_of_breakpoints() > 0, "must not go negative"); | |
|
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1660 method->decr_number_of_breakpoints(Thread::current()); |
| 0 | 1661 } |
|
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1662 |
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1663 // jmethodID handling |
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1664 |
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1665 // This is a block allocating object, sort of like JNIHandleBlock, only a |
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1666 // lot simpler. There aren't many of these, they aren't long, they are rarely |
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1667 // deleted and so we can do some suboptimal things. |
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1668 // It's allocated on the CHeap because once we allocate a jmethodID, we can |
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1669 // never get rid of it. |
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1670 // It would be nice to be able to parameterize the number of methods for |
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1671 // the null_class_loader but then we'd have to turn this and ClassLoaderData |
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1672 // into templates. |
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1673 |
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1674 // I feel like this brain dead class should exist somewhere in the STL |
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1675 |
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1676 class JNIMethodBlock : public CHeapObj<mtClass> { |
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1677 enum { number_of_methods = 8 }; |
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1678 |
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1679 Method* _methods[number_of_methods]; |
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1680 int _top; |
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1681 JNIMethodBlock* _next; |
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1682 public: |
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1683 static Method* const _free_method; |
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1684 |
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1685 JNIMethodBlock() : _next(NULL), _top(0) { |
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1686 for (int i = 0; i< number_of_methods; i++) _methods[i] = _free_method; |
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1687 } |
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1688 |
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1689 Method** add_method(Method* m) { |
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1690 if (_top < number_of_methods) { |
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1691 // top points to the next free entry. |
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1692 int i = _top; |
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1693 _methods[i] = m; |
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1694 _top++; |
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1695 return &_methods[i]; |
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1696 } else if (_top == number_of_methods) { |
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1697 // if the next free entry ran off the block see if there's a free entry |
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1698 for (int i = 0; i< number_of_methods; i++) { |
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1699 if (_methods[i] == _free_method) { |
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1700 _methods[i] = m; |
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1701 return &_methods[i]; |
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1702 } |
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1703 } |
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1704 // Only check each block once for frees. They're very unlikely. |
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1705 // Increment top past the end of the block. |
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1706 _top++; |
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1707 } |
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1708 // need to allocate a next block. |
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1709 if (_next == NULL) { |
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1710 _next = new JNIMethodBlock(); |
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1711 } |
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1712 return _next->add_method(m); |
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1713 } |
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1714 |
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1715 bool contains(Method** m) { |
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1716 for (JNIMethodBlock* b = this; b != NULL; b = b->_next) { |
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1717 for (int i = 0; i< number_of_methods; i++) { |
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1718 if (&(b->_methods[i]) == m) { |
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1719 return true; |
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1720 } |
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1721 } |
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1722 } |
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1723 return false; // not found |
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1724 } |
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1725 |
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1726 // Doesn't really destroy it, just marks it as free so it can be reused. |
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1727 void destroy_method(Method** m) { |
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1728 #ifdef ASSERT |
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1729 assert(contains(m), "should be a methodID"); |
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1730 #endif // ASSERT |
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1731 *m = _free_method; |
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1732 } |
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1733 |
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1734 // During class unloading the methods are cleared, which is different |
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1735 // than freed. |
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1736 void clear_all_methods() { |
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1737 for (JNIMethodBlock* b = this; b != NULL; b = b->_next) { |
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1738 for (int i = 0; i< number_of_methods; i++) { |
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1739 _methods[i] = NULL; |
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1740 } |
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1741 } |
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1742 } |
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1743 #ifndef PRODUCT |
|
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1744 int count_methods() { |
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1745 // count all allocated methods |
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1746 int count = 0; |
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1747 for (JNIMethodBlock* b = this; b != NULL; b = b->_next) { |
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1748 for (int i = 0; i< number_of_methods; i++) { |
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1749 if (_methods[i] != _free_method) count++; |
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1750 } |
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1751 } |
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1752 return count; |
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1753 } |
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1754 #endif // PRODUCT |
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1755 }; |
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1756 |
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1757 // Something that can't be mistaken for an address or a markOop |
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1758 Method* const JNIMethodBlock::_free_method = (Method*)55; |
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1759 |
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1760 // Add a method id to the jmethod_ids |
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1761 jmethodID Method::make_jmethod_id(ClassLoaderData* loader_data, Method* m) { |
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1762 ClassLoaderData* cld = loader_data; |
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1763 |
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1764 if (!SafepointSynchronize::is_at_safepoint()) { |
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1765 // Have to add jmethod_ids() to class loader data thread-safely. |
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1766 // Also have to add the method to the list safely, which the cld lock |
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1767 // protects as well. |
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1768 MutexLockerEx ml(cld->metaspace_lock(), Mutex::_no_safepoint_check_flag); |
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1769 if (cld->jmethod_ids() == NULL) { |
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1770 cld->set_jmethod_ids(new JNIMethodBlock()); |
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1771 } |
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1772 // jmethodID is a pointer to Method* |
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1773 return (jmethodID)cld->jmethod_ids()->add_method(m); |
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1774 } else { |
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1775 // At safepoint, we are single threaded and can set this. |
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1776 if (cld->jmethod_ids() == NULL) { |
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1777 cld->set_jmethod_ids(new JNIMethodBlock()); |
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1778 } |
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1779 // jmethodID is a pointer to Method* |
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1780 return (jmethodID)cld->jmethod_ids()->add_method(m); |
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1781 } |
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1782 } |
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1783 |
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1784 // Mark a jmethodID as free. This is called when there is a data race in |
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1785 // InstanceKlass while creating the jmethodID cache. |
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1786 void Method::destroy_jmethod_id(ClassLoaderData* loader_data, jmethodID m) { |
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1787 ClassLoaderData* cld = loader_data; |
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1788 Method** ptr = (Method**)m; |
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1789 assert(cld->jmethod_ids() != NULL, "should have method handles"); |
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1790 cld->jmethod_ids()->destroy_method(ptr); |
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1791 } |
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1792 |
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1793 void Method::change_method_associated_with_jmethod_id(jmethodID jmid, Method* new_method) { |
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1794 // Can't assert the method_holder is the same because the new method has the |
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1795 // scratch method holder. |
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1796 assert(resolve_jmethod_id(jmid)->method_holder()->class_loader() |
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1797 == new_method->method_holder()->class_loader(), |
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1798 "changing to a different class loader"); |
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1799 // Just change the method in place, jmethodID pointer doesn't change. |
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1800 *((Method**)jmid) = new_method; |
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1801 } |
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1802 |
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1803 bool Method::is_method_id(jmethodID mid) { |
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1804 Method* m = resolve_jmethod_id(mid); |
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1805 assert(m != NULL, "should be called with non-null method"); |
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1806 InstanceKlass* ik = m->method_holder(); |
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1807 ClassLoaderData* cld = ik->class_loader_data(); |
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1808 if (cld->jmethod_ids() == NULL) return false; |
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1809 return (cld->jmethod_ids()->contains((Method**)mid)); |
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1810 } |
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1811 |
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1812 Method* Method::checked_resolve_jmethod_id(jmethodID mid) { |
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1813 if (mid == NULL) return NULL; |
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1814 Method* o = resolve_jmethod_id(mid); |
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1815 if (o == NULL || o == JNIMethodBlock::_free_method || !((Metadata*)o)->is_method()) { |
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1816 return NULL; |
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1817 } |
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1818 return o; |
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1819 }; |
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1820 |
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1821 void Method::set_on_stack(const bool value) { |
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1822 // Set both the method itself and its constant pool. The constant pool |
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1823 // on stack means some method referring to it is also on the stack. |
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1824 _access_flags.set_on_stack(value); |
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1825 constants()->set_on_stack(value); |
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1826 if (value) MetadataOnStackMark::record(this); |
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1827 } |
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1828 |
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1829 // Called when the class loader is unloaded to make all methods weak. |
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1830 void Method::clear_jmethod_ids(ClassLoaderData* loader_data) { |
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1831 loader_data->jmethod_ids()->clear_all_methods(); |
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1832 } |
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1833 |
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1834 |
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1835 // Check that this pointer is valid by checking that the vtbl pointer matches |
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1836 bool Method::is_valid_method() const { |
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1837 if (this == NULL) { |
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1838 return false; |
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1839 } else if (!is_metaspace_object()) { |
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1840 return false; |
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1841 } else { |
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1842 Method m; |
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1843 // This assumes that the vtbl pointer is the first word of a C++ object. |
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1844 // This assumption is also in universe.cpp patch_klass_vtble |
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1845 void* vtbl2 = dereference_vptr((void*)&m); |
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1846 void* this_vtbl = dereference_vptr((void*)this); |
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1847 return vtbl2 == this_vtbl; |
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1848 } |
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1849 } |
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1850 |
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1851 #ifndef PRODUCT |
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1852 void Method::print_jmethod_ids(ClassLoaderData* loader_data, outputStream* out) { |
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1853 out->print_cr("jni_method_id count = %d", loader_data->jmethod_ids()->count_methods()); |
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1854 } |
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1855 #endif // PRODUCT |
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1856 |
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1857 |
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1858 // Printing |
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1859 |
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1860 #ifndef PRODUCT |
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1861 |
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1862 void Method::print_on(outputStream* st) const { |
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1863 ResourceMark rm; |
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1864 assert(is_method(), "must be method"); |
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1865 st->print_cr(internal_name()); |
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1866 // get the effect of PrintOopAddress, always, for methods: |
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1867 st->print_cr(" - this oop: "INTPTR_FORMAT, (intptr_t)this); |
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1868 st->print (" - method holder: "); method_holder()->print_value_on(st); st->cr(); |
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1869 st->print (" - constants: "INTPTR_FORMAT" ", (address)constants()); |
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1870 constants()->print_value_on(st); st->cr(); |
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1871 st->print (" - access: 0x%x ", access_flags().as_int()); access_flags().print_on(st); st->cr(); |
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1872 st->print (" - name: "); name()->print_value_on(st); st->cr(); |
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1873 st->print (" - signature: "); signature()->print_value_on(st); st->cr(); |
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1874 st->print_cr(" - max stack: %d", max_stack()); |
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1875 st->print_cr(" - max locals: %d", max_locals()); |
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1876 st->print_cr(" - size of params: %d", size_of_parameters()); |
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1877 st->print_cr(" - method size: %d", method_size()); |
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1878 if (intrinsic_id() != vmIntrinsics::_none) |
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1879 st->print_cr(" - intrinsic id: %d %s", intrinsic_id(), vmIntrinsics::name_at(intrinsic_id())); |
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1880 if (highest_comp_level() != CompLevel_none) |
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1881 st->print_cr(" - highest level: %d", highest_comp_level()); |
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1882 st->print_cr(" - vtable index: %d", _vtable_index); |
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1883 st->print_cr(" - i2i entry: " INTPTR_FORMAT, interpreter_entry()); |
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1884 st->print( " - adapters: "); |
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1885 AdapterHandlerEntry* a = ((Method*)this)->adapter(); |
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1886 if (a == NULL) |
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1887 st->print_cr(INTPTR_FORMAT, a); |
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1888 else |
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1889 a->print_adapter_on(st); |
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1890 st->print_cr(" - compiled entry " INTPTR_FORMAT, from_compiled_entry()); |
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1891 st->print_cr(" - code size: %d", code_size()); |
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1892 if (code_size() != 0) { |
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1893 st->print_cr(" - code start: " INTPTR_FORMAT, code_base()); |
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1894 st->print_cr(" - code end (excl): " INTPTR_FORMAT, code_base() + code_size()); |
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1895 } |
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1896 if (method_data() != NULL) { |
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1897 st->print_cr(" - method data: " INTPTR_FORMAT, (address)method_data()); |
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1898 } |
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1899 st->print_cr(" - checked ex length: %d", checked_exceptions_length()); |
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1900 if (checked_exceptions_length() > 0) { |
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1901 CheckedExceptionElement* table = checked_exceptions_start(); |
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1902 st->print_cr(" - checked ex start: " INTPTR_FORMAT, table); |
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1903 if (Verbose) { |
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1904 for (int i = 0; i < checked_exceptions_length(); i++) { |
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1905 st->print_cr(" - throws %s", constants()->printable_name_at(table[i].class_cp_index)); |
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1906 } |
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1907 } |
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1908 } |
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1909 if (has_linenumber_table()) { |
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1910 u_char* table = compressed_linenumber_table(); |
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1911 st->print_cr(" - linenumber start: " INTPTR_FORMAT, table); |
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1912 if (Verbose) { |
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1913 CompressedLineNumberReadStream stream(table); |
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1914 while (stream.read_pair()) { |
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1915 st->print_cr(" - line %d: %d", stream.line(), stream.bci()); |
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1916 } |
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1917 } |
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1918 } |
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1919 st->print_cr(" - localvar length: %d", localvariable_table_length()); |
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1920 if (localvariable_table_length() > 0) { |
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1921 LocalVariableTableElement* table = localvariable_table_start(); |
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1922 st->print_cr(" - localvar start: " INTPTR_FORMAT, table); |
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1923 if (Verbose) { |
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1924 for (int i = 0; i < localvariable_table_length(); i++) { |
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1925 int bci = table[i].start_bci; |
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1926 int len = table[i].length; |
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1927 const char* name = constants()->printable_name_at(table[i].name_cp_index); |
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1928 const char* desc = constants()->printable_name_at(table[i].descriptor_cp_index); |
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1929 int slot = table[i].slot; |
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1930 st->print_cr(" - %s %s bci=%d len=%d slot=%d", desc, name, bci, len, slot); |
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1931 } |
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1932 } |
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1933 } |
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1934 if (code() != NULL) { |
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1935 st->print (" - compiled code: "); |
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1936 code()->print_value_on(st); |
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1937 } |
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1938 if (is_native()) { |
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1939 st->print_cr(" - native function: " INTPTR_FORMAT, native_function()); |
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1940 st->print_cr(" - signature handler: " INTPTR_FORMAT, signature_handler()); |
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1941 } |
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1942 } |
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1943 |
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1944 #endif //PRODUCT |
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1945 |
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1946 void Method::print_value_on(outputStream* st) const { |
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1947 assert(is_method(), "must be method"); |
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1948 st->print_cr(internal_name()); |
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1949 print_address_on(st); |
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1950 st->print(" "); |
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1951 name()->print_value_on(st); |
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1952 st->print(" "); |
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1953 signature()->print_value_on(st); |
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1954 st->print(" in "); |
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1955 method_holder()->print_value_on(st); |
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1956 if (WizardMode) st->print("[%d,%d]", size_of_parameters(), max_locals()); |
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1957 if (WizardMode && code() != NULL) st->print(" ((nmethod*)%p)", code()); |
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1958 } |
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1959 |
| 7956 | 1960 #if INCLUDE_SERVICES |
| 1961 // Size Statistics | |
| 1962 void Method::collect_statistics(KlassSizeStats *sz) const { | |
| 1963 int mysize = sz->count(this); | |
| 1964 sz->_method_bytes += mysize; | |
| 1965 sz->_method_all_bytes += mysize; | |
| 1966 sz->_rw_bytes += mysize; | |
| 1967 | |
| 1968 if (constMethod()) { | |
| 1969 constMethod()->collect_statistics(sz); | |
| 1970 } | |
| 1971 if (method_data()) { | |
| 1972 method_data()->collect_statistics(sz); | |
| 1973 } | |
| 1974 } | |
| 1975 #endif // INCLUDE_SERVICES | |
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1976 |
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1977 // Verification |
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1978 |
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1979 void Method::verify_on(outputStream* st) { |
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1980 guarantee(is_method(), "object must be method"); |
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1981 guarantee(constants()->is_constantPool(), "should be constant pool"); |
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1982 guarantee(constMethod()->is_constMethod(), "should be ConstMethod*"); |
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1983 MethodData* md = method_data(); |
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1984 guarantee(md == NULL || |
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1985 md->is_methodData(), "should be method data"); |
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1986 } |