Mercurial > hg > truffle
annotate src/share/vm/oops/method.cpp @ 20470:bc4ce33c0985
8049529: LogCompilation: annotate make_not_compilable with compilation level
Reviewed-by: roland, iveresov
| author | vlivanov |
|---|---|
| date | Mon, 14 Jul 2014 03:27:21 -0700 |
| parents | 631667807de7 |
| children | 966205f0e717 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
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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" | |
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52 #include "runtime/orderAccess.inline.hpp" |
| 1972 | 53 #include "runtime/relocator.hpp" |
| 54 #include "runtime/sharedRuntime.hpp" | |
| 55 #include "runtime/signature.hpp" | |
| 3779 | 56 #include "utilities/quickSort.hpp" |
| 1972 | 57 #include "utilities/xmlstream.hpp" |
| 0 | 58 |
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59 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
| 0 | 60 |
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61 // Implementation of Method |
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62 |
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63 Method* Method::allocate(ClassLoaderData* loader_data, |
| 6934 | 64 int byte_code_size, |
| 65 AccessFlags access_flags, | |
| 8031 | 66 InlineTableSizes* sizes, |
| 6934 | 67 ConstMethod::MethodType method_type, |
| 68 TRAPS) { | |
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69 assert(!access_flags.is_native() || byte_code_size == 0, |
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70 "native methods should not contain byte codes"); |
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71 ConstMethod* cm = ConstMethod::allocate(loader_data, |
| 6934 | 72 byte_code_size, |
| 8031 | 73 sizes, |
| 6934 | 74 method_type, |
| 75 CHECK_NULL); | |
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76 |
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77 int size = Method::size(access_flags.is_native()); |
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78 |
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79 return new (loader_data, size, false, MetaspaceObj::MethodType, THREAD) Method(cm, access_flags, size); |
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80 } |
| 0 | 81 |
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82 Method::Method(ConstMethod* xconst, AccessFlags access_flags, int size) { |
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83 No_Safepoint_Verifier no_safepoint; |
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84 set_constMethod(xconst); |
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85 set_access_flags(access_flags); |
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86 set_method_size(size); |
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87 #ifdef CC_INTERP |
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88 set_result_index(T_VOID); |
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89 #endif |
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90 set_intrinsic_id(vmIntrinsics::_none); |
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91 set_jfr_towrite(false); |
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92 set_force_inline(false); |
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93 set_hidden(false); |
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94 set_dont_inline(false); |
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95 set_method_data(NULL); |
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96 set_method_counters(NULL); |
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97 set_vtable_index(Method::garbage_vtable_index); |
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98 |
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99 // Fix and bury in Method* |
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100 set_interpreter_entry(NULL); // sets i2i entry and from_int |
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101 set_adapter_entry(NULL); |
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102 clear_code(); // from_c/from_i get set to c2i/i2i |
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103 |
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104 if (access_flags.is_native()) { |
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105 clear_native_function(); |
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106 set_signature_handler(NULL); |
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107 } |
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108 |
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109 NOT_PRODUCT(set_compiled_invocation_count(0);) |
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110 } |
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111 |
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112 // Release Method*. The nmethod will be gone when we get here because |
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113 // we've walked the code cache. |
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114 void Method::deallocate_contents(ClassLoaderData* loader_data) { |
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115 MetadataFactory::free_metadata(loader_data, constMethod()); |
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116 set_constMethod(NULL); |
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117 MetadataFactory::free_metadata(loader_data, method_data()); |
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118 set_method_data(NULL); |
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119 MetadataFactory::free_metadata(loader_data, method_counters()); |
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120 set_method_counters(NULL); |
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121 // The nmethod will be gone when we get here. |
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122 if (code() != NULL) _code = NULL; |
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123 } |
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124 |
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125 address Method::get_i2c_entry() { |
| 0 | 126 assert(_adapter != NULL, "must have"); |
| 127 return _adapter->get_i2c_entry(); | |
| 128 } | |
| 129 | |
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130 address Method::get_c2i_entry() { |
| 0 | 131 assert(_adapter != NULL, "must have"); |
| 132 return _adapter->get_c2i_entry(); | |
| 133 } | |
| 134 | |
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135 address Method::get_c2i_unverified_entry() { |
| 0 | 136 assert(_adapter != NULL, "must have"); |
| 137 return _adapter->get_c2i_unverified_entry(); | |
| 138 } | |
| 139 | |
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140 char* Method::name_and_sig_as_C_string() const { |
| 6983 | 141 return name_and_sig_as_C_string(constants()->pool_holder(), name(), signature()); |
| 0 | 142 } |
| 143 | |
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144 char* Method::name_and_sig_as_C_string(char* buf, int size) const { |
| 6983 | 145 return name_and_sig_as_C_string(constants()->pool_holder(), name(), signature(), buf, size); |
| 0 | 146 } |
| 147 | |
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148 char* Method::name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature) { |
| 0 | 149 const char* klass_name = klass->external_name(); |
| 150 int klass_name_len = (int)strlen(klass_name); | |
| 151 int method_name_len = method_name->utf8_length(); | |
| 152 int len = klass_name_len + 1 + method_name_len + signature->utf8_length(); | |
| 153 char* dest = NEW_RESOURCE_ARRAY(char, len + 1); | |
| 154 strcpy(dest, klass_name); | |
| 155 dest[klass_name_len] = '.'; | |
| 156 strcpy(&dest[klass_name_len + 1], method_name->as_C_string()); | |
| 157 strcpy(&dest[klass_name_len + 1 + method_name_len], signature->as_C_string()); | |
| 158 dest[len] = 0; | |
| 159 return dest; | |
| 160 } | |
| 161 | |
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162 char* Method::name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size) { |
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163 Symbol* klass_name = klass->name(); |
| 0 | 164 klass_name->as_klass_external_name(buf, size); |
| 165 int len = (int)strlen(buf); | |
| 166 | |
| 167 if (len < size - 1) { | |
| 168 buf[len++] = '.'; | |
| 169 | |
| 170 method_name->as_C_string(&(buf[len]), size - len); | |
| 171 len = (int)strlen(buf); | |
| 172 | |
| 173 signature->as_C_string(&(buf[len]), size - len); | |
| 174 } | |
| 175 | |
| 176 return buf; | |
| 177 } | |
| 178 | |
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179 int Method::fast_exception_handler_bci_for(methodHandle mh, KlassHandle ex_klass, int throw_bci, TRAPS) { |
| 0 | 180 // exception table holds quadruple entries of the form (beg_bci, end_bci, handler_bci, klass_index) |
| 181 // access exception table | |
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182 ExceptionTable table(mh()); |
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183 int length = table.length(); |
| 0 | 184 // iterate through all entries sequentially |
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185 constantPoolHandle pool(THREAD, mh->constants()); |
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186 for (int i = 0; i < length; i ++) { |
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187 //reacquire the table in case a GC happened |
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188 ExceptionTable table(mh()); |
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189 int beg_bci = table.start_pc(i); |
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190 int end_bci = table.end_pc(i); |
| 0 | 191 assert(beg_bci <= end_bci, "inconsistent exception table"); |
| 192 if (beg_bci <= throw_bci && throw_bci < end_bci) { | |
| 193 // exception handler bci range covers throw_bci => investigate further | |
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194 int handler_bci = table.handler_pc(i); |
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195 int klass_index = table.catch_type_index(i); |
| 0 | 196 if (klass_index == 0) { |
| 197 return handler_bci; | |
| 198 } else if (ex_klass.is_null()) { | |
| 199 return handler_bci; | |
| 200 } else { | |
| 201 // we know the exception class => get the constraint class | |
| 202 // this may require loading of the constraint class; if verification | |
| 203 // fails or some other exception occurs, return handler_bci | |
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204 Klass* k = pool->klass_at(klass_index, CHECK_(handler_bci)); |
| 0 | 205 KlassHandle klass = KlassHandle(THREAD, k); |
| 206 assert(klass.not_null(), "klass not loaded"); | |
| 207 if (ex_klass->is_subtype_of(klass())) { | |
| 208 return handler_bci; | |
| 209 } | |
| 210 } | |
| 211 } | |
| 212 } | |
| 213 | |
| 214 return -1; | |
| 215 } | |
| 216 | |
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217 void Method::mask_for(int bci, InterpreterOopMap* mask) { |
| 0 | 218 |
| 219 Thread* myThread = Thread::current(); | |
| 220 methodHandle h_this(myThread, this); | |
| 221 #ifdef ASSERT | |
| 222 bool has_capability = myThread->is_VM_thread() || | |
| 223 myThread->is_ConcurrentGC_thread() || | |
| 224 myThread->is_GC_task_thread(); | |
| 225 | |
| 226 if (!has_capability) { | |
| 227 if (!VerifyStack && !VerifyLastFrame) { | |
| 228 // verify stack calls this outside VM thread | |
| 229 warning("oopmap should only be accessed by the " | |
| 230 "VM, GC task or CMS threads (or during debugging)"); | |
| 231 InterpreterOopMap local_mask; | |
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232 method_holder()->mask_for(h_this, bci, &local_mask); |
| 0 | 233 local_mask.print(); |
| 234 } | |
| 235 } | |
| 236 #endif | |
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237 method_holder()->mask_for(h_this, bci, mask); |
| 0 | 238 return; |
| 239 } | |
| 240 | |
| 241 | |
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242 int Method::bci_from(address bcp) const { |
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243 #ifdef ASSERT |
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244 { ResourceMark rm; |
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245 assert(is_native() && bcp == code_base() || contains(bcp) || is_error_reported(), |
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246 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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247 } |
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248 #endif |
| 0 | 249 return bcp - code_base(); |
| 250 } | |
| 251 | |
| 252 | |
| 253 // Return (int)bcx if it appears to be a valid BCI. | |
| 254 // Return bci_from((address)bcx) if it appears to be a valid BCP. | |
| 255 // Return -1 otherwise. | |
| 256 // Used by profiling code, when invalid data is a possibility. | |
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257 // The caller is responsible for validating the Method* itself. |
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258 int Method::validate_bci_from_bcx(intptr_t bcx) const { |
| 0 | 259 // keep bci as -1 if not a valid bci |
| 260 int bci = -1; | |
| 261 if (bcx == 0 || (address)bcx == code_base()) { | |
| 262 // code_size() may return 0 and we allow 0 here | |
| 263 // the method may be native | |
| 264 bci = 0; | |
| 265 } else if (frame::is_bci(bcx)) { | |
| 266 if (bcx < code_size()) { | |
| 267 bci = (int)bcx; | |
| 268 } | |
| 269 } else if (contains((address)bcx)) { | |
| 270 bci = (address)bcx - code_base(); | |
| 271 } | |
| 272 // Assert that if we have dodged any asserts, bci is negative. | |
| 273 assert(bci == -1 || bci == bci_from(bcp_from(bci)), "sane bci if >=0"); | |
| 274 return bci; | |
| 275 } | |
| 276 | |
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277 address Method::bcp_from(int bci) const { |
| 17780 | 278 assert((is_native() && bci == 0) || (!is_native() && 0 <= bci && bci < code_size()), err_msg("illegal bci: %d", bci)); |
| 0 | 279 address bcp = code_base() + bci; |
| 280 assert(is_native() && bcp == code_base() || contains(bcp), "bcp doesn't belong to this method"); | |
| 281 return bcp; | |
| 282 } | |
| 283 | |
| 284 | |
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285 int Method::size(bool is_native) { |
| 0 | 286 // If native, then include pointers for native_function and signature_handler |
| 287 int extra_bytes = (is_native) ? 2*sizeof(address*) : 0; | |
| 288 int extra_words = align_size_up(extra_bytes, BytesPerWord) / BytesPerWord; | |
| 289 return align_object_size(header_size() + extra_words); | |
| 290 } | |
| 291 | |
| 292 | |
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293 Symbol* Method::klass_name() const { |
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294 Klass* k = method_holder(); |
| 0 | 295 assert(k->is_klass(), "must be klass"); |
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296 InstanceKlass* ik = (InstanceKlass*) k; |
| 0 | 297 return ik->name(); |
| 298 } | |
| 299 | |
| 300 | |
| 301 // Attempt to return method oop to original state. Clear any pointers | |
| 302 // (to objects outside the shared spaces). We won't be able to predict | |
| 303 // where they should point in a new JVM. Further initialize some | |
| 304 // entries now in order allow them to be write protected later. | |
| 305 | |
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306 void Method::remove_unshareable_info() { |
| 0 | 307 unlink_method(); |
| 308 } | |
| 309 | |
| 310 | |
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311 bool Method::was_executed_more_than(int n) { |
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312 // Invocation counter is reset when the Method* is compiled. |
| 0 | 313 // If the method has compiled code we therefore assume it has |
| 314 // be excuted more than n times. | |
| 315 if (is_accessor() || is_empty_method() || (code() != NULL)) { | |
| 316 // interpreter doesn't bump invocation counter of trivial methods | |
| 317 // compiler does not bump invocation counter of compiled methods | |
| 318 return true; | |
| 1783 | 319 } |
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320 else if ((method_counters() != NULL && |
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321 method_counters()->invocation_counter()->carry()) || |
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322 (method_data() != NULL && |
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323 method_data()->invocation_counter()->carry())) { |
| 0 | 324 // The carry bit is set when the counter overflows and causes |
| 325 // a compilation to occur. We don't know how many times | |
| 326 // the counter has been reset, so we simply assume it has | |
| 327 // been executed more than n times. | |
| 328 return true; | |
| 329 } else { | |
| 330 return invocation_count() > n; | |
| 331 } | |
| 332 } | |
| 333 | |
| 334 #ifndef PRODUCT | |
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335 void Method::print_invocation_count() { |
| 0 | 336 if (is_static()) tty->print("static "); |
| 337 if (is_final()) tty->print("final "); | |
| 338 if (is_synchronized()) tty->print("synchronized "); | |
| 339 if (is_native()) tty->print("native "); | |
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340 method_holder()->name()->print_symbol_on(tty); |
| 0 | 341 tty->print("."); |
| 342 name()->print_symbol_on(tty); | |
| 343 signature()->print_symbol_on(tty); | |
| 344 | |
| 345 if (WizardMode) { | |
| 346 // dump the size of the byte codes | |
| 347 tty->print(" {%d}", code_size()); | |
| 348 } | |
| 349 tty->cr(); | |
| 350 | |
| 351 tty->print_cr (" interpreter_invocation_count: %8d ", interpreter_invocation_count()); | |
| 352 tty->print_cr (" invocation_counter: %8d ", invocation_count()); | |
| 353 tty->print_cr (" backedge_counter: %8d ", backedge_count()); | |
| 354 if (CountCompiledCalls) { | |
| 355 tty->print_cr (" compiled_invocation_count: %8d ", compiled_invocation_count()); | |
| 356 } | |
| 357 | |
| 358 } | |
| 359 #endif | |
| 360 | |
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361 // Build a MethodData* object to hold information about this method |
| 0 | 362 // collected in the interpreter. |
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363 void Method::build_interpreter_method_data(methodHandle method, TRAPS) { |
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364 // Do not profile method if current thread holds the pending list lock, |
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365 // which avoids deadlock for acquiring the MethodData_lock. |
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366 if (InstanceRefKlass::owns_pending_list_lock((JavaThread*)THREAD)) { |
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367 return; |
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368 } |
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369 |
| 0 | 370 // Grab a lock here to prevent multiple |
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371 // MethodData*s from being created. |
| 0 | 372 MutexLocker ml(MethodData_lock, THREAD); |
| 373 if (method->method_data() == NULL) { | |
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374 ClassLoaderData* loader_data = method->method_holder()->class_loader_data(); |
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375 MethodData* method_data = MethodData::allocate(loader_data, method, CHECK); |
| 0 | 376 method->set_method_data(method_data); |
| 377 if (PrintMethodData && (Verbose || WizardMode)) { | |
| 378 ResourceMark rm(THREAD); | |
| 379 tty->print("build_interpreter_method_data for "); | |
| 380 method->print_name(tty); | |
| 381 tty->cr(); | |
| 382 // At the end of the run, the MDO, full of data, will be dumped. | |
| 383 } | |
| 384 } | |
| 385 } | |
| 386 | |
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387 MethodCounters* Method::build_method_counters(Method* m, TRAPS) { |
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388 methodHandle mh(m); |
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389 ClassLoaderData* loader_data = mh->method_holder()->class_loader_data(); |
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390 MethodCounters* counters = MethodCounters::allocate(loader_data, CHECK_NULL); |
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391 if (mh->method_counters() == NULL) { |
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392 mh->set_method_counters(counters); |
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393 } else { |
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394 MetadataFactory::free_metadata(loader_data, counters); |
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395 } |
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396 return mh->method_counters(); |
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397 } |
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398 |
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399 void Method::cleanup_inline_caches() { |
| 0 | 400 // The current system doesn't use inline caches in the interpreter |
| 401 // => nothing to do (keep this method around for future use) | |
| 402 } | |
| 403 | |
| 404 | |
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405 int Method::extra_stack_words() { |
| 710 | 406 // not an inline function, to avoid a header dependency on Interpreter |
| 1506 | 407 return extra_stack_entries() * Interpreter::stackElementSize; |
| 710 | 408 } |
| 409 | |
| 410 | |
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411 void Method::compute_size_of_parameters(Thread *thread) { |
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412 ArgumentSizeComputer asc(signature()); |
| 0 | 413 set_size_of_parameters(asc.size() + (is_static() ? 0 : 1)); |
| 414 } | |
| 415 | |
| 416 #ifdef CC_INTERP | |
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417 void Method::set_result_index(BasicType type) { |
| 0 | 418 _result_index = Interpreter::BasicType_as_index(type); |
| 419 } | |
| 420 #endif | |
| 421 | |
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422 BasicType Method::result_type() const { |
| 0 | 423 ResultTypeFinder rtf(signature()); |
| 424 return rtf.type(); | |
| 425 } | |
| 426 | |
| 427 | |
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428 bool Method::is_empty_method() const { |
| 0 | 429 return code_size() == 1 |
| 430 && *code_base() == Bytecodes::_return; | |
| 431 } | |
| 432 | |
| 433 | |
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434 bool Method::is_vanilla_constructor() const { |
| 0 | 435 // Returns true if this method is a vanilla constructor, i.e. an "<init>" "()V" method |
| 436 // which only calls the superclass vanilla constructor and possibly does stores of | |
| 437 // zero constants to local fields: | |
| 438 // | |
| 439 // aload_0 | |
| 440 // invokespecial | |
| 441 // indexbyte1 | |
| 442 // indexbyte2 | |
| 443 // | |
| 444 // followed by an (optional) sequence of: | |
| 445 // | |
| 446 // aload_0 | |
| 447 // aconst_null / iconst_0 / fconst_0 / dconst_0 | |
| 448 // putfield | |
| 449 // indexbyte1 | |
| 450 // indexbyte2 | |
| 451 // | |
| 452 // followed by: | |
| 453 // | |
| 454 // return | |
| 455 | |
| 456 assert(name() == vmSymbols::object_initializer_name(), "Should only be called for default constructors"); | |
| 457 assert(signature() == vmSymbols::void_method_signature(), "Should only be called for default constructors"); | |
| 458 int size = code_size(); | |
| 459 // Check if size match | |
| 460 if (size == 0 || size % 5 != 0) return false; | |
| 461 address cb = code_base(); | |
| 462 int last = size - 1; | |
| 463 if (cb[0] != Bytecodes::_aload_0 || cb[1] != Bytecodes::_invokespecial || cb[last] != Bytecodes::_return) { | |
| 464 // Does not call superclass default constructor | |
| 465 return false; | |
| 466 } | |
| 467 // Check optional sequence | |
| 468 for (int i = 4; i < last; i += 5) { | |
| 469 if (cb[i] != Bytecodes::_aload_0) return false; | |
| 470 if (!Bytecodes::is_zero_const(Bytecodes::cast(cb[i+1]))) return false; | |
| 471 if (cb[i+2] != Bytecodes::_putfield) return false; | |
| 472 } | |
| 473 return true; | |
| 474 } | |
| 475 | |
| 476 | |
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477 bool Method::compute_has_loops_flag() { |
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478 BytecodeStream bcs(this); |
| 0 | 479 Bytecodes::Code bc; |
| 480 | |
| 481 while ((bc = bcs.next()) >= 0) { | |
| 482 switch( bc ) { | |
| 483 case Bytecodes::_ifeq: | |
| 484 case Bytecodes::_ifnull: | |
| 485 case Bytecodes::_iflt: | |
| 486 case Bytecodes::_ifle: | |
| 487 case Bytecodes::_ifne: | |
| 488 case Bytecodes::_ifnonnull: | |
| 489 case Bytecodes::_ifgt: | |
| 490 case Bytecodes::_ifge: | |
| 491 case Bytecodes::_if_icmpeq: | |
| 492 case Bytecodes::_if_icmpne: | |
| 493 case Bytecodes::_if_icmplt: | |
| 494 case Bytecodes::_if_icmpgt: | |
| 495 case Bytecodes::_if_icmple: | |
| 496 case Bytecodes::_if_icmpge: | |
| 497 case Bytecodes::_if_acmpeq: | |
| 498 case Bytecodes::_if_acmpne: | |
| 499 case Bytecodes::_goto: | |
| 500 case Bytecodes::_jsr: | |
| 501 if( bcs.dest() < bcs.next_bci() ) _access_flags.set_has_loops(); | |
| 502 break; | |
| 503 | |
| 504 case Bytecodes::_goto_w: | |
| 505 case Bytecodes::_jsr_w: | |
| 506 if( bcs.dest_w() < bcs.next_bci() ) _access_flags.set_has_loops(); | |
| 507 break; | |
| 508 } | |
| 509 } | |
| 510 _access_flags.set_loops_flag_init(); | |
| 511 return _access_flags.has_loops(); | |
| 512 } | |
| 513 | |
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514 bool Method::is_final_method(AccessFlags class_access_flags) const { |
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515 // or "does_not_require_vtable_entry" |
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516 // default method or overpass can occur, is not final (reuses vtable entry) |
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517 // private methods get vtable entries for backward class compatibility. |
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518 if (is_overpass() || is_default_method()) return false; |
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519 return is_final() || class_access_flags.is_final(); |
| 0 | 520 } |
| 521 | |
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522 bool Method::is_final_method() const { |
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523 return is_final_method(method_holder()->access_flags()); |
| 0 | 524 } |
| 525 | |
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526 bool Method::is_default_method() const { |
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527 if (method_holder() != NULL && |
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528 method_holder()->is_interface() && |
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529 !is_abstract()) { |
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530 return true; |
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531 } else { |
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532 return false; |
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533 } |
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534 } |
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535 |
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536 bool Method::can_be_statically_bound(AccessFlags class_access_flags) const { |
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537 if (is_final_method(class_access_flags)) return true; |
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538 #ifdef ASSERT |
|
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539 ResourceMark rm; |
|
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540 bool is_nonv = (vtable_index() == nonvirtual_vtable_index); |
|
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541 if (class_access_flags.is_interface()) { |
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542 assert(is_nonv == is_static(), err_msg("is_nonv=%s", name_and_sig_as_C_string())); |
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543 } |
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544 #endif |
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545 assert(valid_vtable_index() || valid_itable_index(), "method must be linked before we ask this question"); |
| 0 | 546 return vtable_index() == nonvirtual_vtable_index; |
| 547 } | |
| 548 | |
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549 bool Method::can_be_statically_bound() const { |
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550 return can_be_statically_bound(method_holder()->access_flags()); |
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551 } |
| 0 | 552 |
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553 bool Method::is_accessor() const { |
| 0 | 554 if (code_size() != 5) return false; |
| 555 if (size_of_parameters() != 1) return false; | |
| 2142 | 556 if (java_code_at(0) != Bytecodes::_aload_0 ) return false; |
| 557 if (java_code_at(1) != Bytecodes::_getfield) return false; | |
| 558 if (java_code_at(4) != Bytecodes::_areturn && | |
| 559 java_code_at(4) != Bytecodes::_ireturn ) return false; | |
| 0 | 560 return true; |
| 561 } | |
| 562 | |
| 563 | |
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564 bool Method::is_initializer() const { |
|
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565 return name() == vmSymbols::object_initializer_name() || is_static_initializer(); |
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566 } |
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567 |
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568 bool Method::has_valid_initializer_flags() const { |
|
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569 return (is_static() || |
|
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570 method_holder()->major_version() < 51); |
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571 } |
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572 |
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573 bool Method::is_static_initializer() const { |
|
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574 // For classfiles version 51 or greater, ensure that the clinit method is |
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575 // static. Non-static methods with the name "<clinit>" are not static |
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576 // initializers. (older classfiles exempted for backward compatibility) |
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577 return name() == vmSymbols::class_initializer_name() && |
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578 has_valid_initializer_flags(); |
| 0 | 579 } |
| 580 | |
| 581 | |
|
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582 objArrayHandle Method::resolved_checked_exceptions_impl(Method* this_oop, TRAPS) { |
| 0 | 583 int length = this_oop->checked_exceptions_length(); |
| 584 if (length == 0) { // common case | |
| 585 return objArrayHandle(THREAD, Universe::the_empty_class_klass_array()); | |
| 586 } else { | |
| 587 methodHandle h_this(THREAD, this_oop); | |
| 1142 | 588 objArrayOop m_oop = oopFactory::new_objArray(SystemDictionary::Class_klass(), length, CHECK_(objArrayHandle())); |
| 0 | 589 objArrayHandle mirrors (THREAD, m_oop); |
| 590 for (int i = 0; i < length; i++) { | |
| 591 CheckedExceptionElement* table = h_this->checked_exceptions_start(); // recompute on each iteration, not gc safe | |
|
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592 Klass* k = h_this->constants()->klass_at(table[i].class_cp_index, CHECK_(objArrayHandle())); |
| 6983 | 593 assert(k->is_subclass_of(SystemDictionary::Throwable_klass()), "invalid exception class"); |
| 594 mirrors->obj_at_put(i, k->java_mirror()); | |
| 0 | 595 } |
| 596 return mirrors; | |
| 597 } | |
| 598 }; | |
| 599 | |
| 600 | |
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601 int Method::line_number_from_bci(int bci) const { |
| 0 | 602 if (bci == SynchronizationEntryBCI) bci = 0; |
| 603 assert(bci == 0 || 0 <= bci && bci < code_size(), "illegal bci"); | |
| 604 int best_bci = 0; | |
| 605 int best_line = -1; | |
| 606 | |
| 607 if (has_linenumber_table()) { | |
| 608 // The line numbers are a short array of 2-tuples [start_pc, line_number]. | |
| 609 // Not necessarily sorted and not necessarily one-to-one. | |
| 610 CompressedLineNumberReadStream stream(compressed_linenumber_table()); | |
| 611 while (stream.read_pair()) { | |
| 612 if (stream.bci() == bci) { | |
| 613 // perfect match | |
| 614 return stream.line(); | |
| 615 } else { | |
| 616 // update best_bci/line | |
| 617 if (stream.bci() < bci && stream.bci() >= best_bci) { | |
| 618 best_bci = stream.bci(); | |
| 619 best_line = stream.line(); | |
| 620 } | |
| 621 } | |
| 622 } | |
| 623 } | |
| 624 return best_line; | |
| 625 } | |
| 626 | |
| 627 | |
|
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628 bool Method::is_klass_loaded_by_klass_index(int klass_index) const { |
|
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629 if( constants()->tag_at(klass_index).is_unresolved_klass() ) { |
| 0 | 630 Thread *thread = Thread::current(); |
|
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631 Symbol* klass_name = constants()->klass_name_at(klass_index); |
|
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632 Handle loader(thread, method_holder()->class_loader()); |
| 6983 | 633 Handle prot (thread, method_holder()->protection_domain()); |
| 0 | 634 return SystemDictionary::find(klass_name, loader, prot, thread) != NULL; |
| 635 } else { | |
| 636 return true; | |
| 637 } | |
| 638 } | |
| 639 | |
| 640 | |
|
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641 bool Method::is_klass_loaded(int refinfo_index, bool must_be_resolved) const { |
|
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642 int klass_index = constants()->klass_ref_index_at(refinfo_index); |
| 0 | 643 if (must_be_resolved) { |
| 644 // Make sure klass is resolved in constantpool. | |
| 645 if (constants()->tag_at(klass_index).is_unresolved_klass()) return false; | |
| 646 } | |
| 647 return is_klass_loaded_by_klass_index(klass_index); | |
| 648 } | |
| 649 | |
| 650 | |
|
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651 void Method::set_native_function(address function, bool post_event_flag) { |
| 0 | 652 assert(function != NULL, "use clear_native_function to unregister natives"); |
|
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653 assert(!is_method_handle_intrinsic() || function == SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), ""); |
| 0 | 654 address* native_function = native_function_addr(); |
| 655 | |
| 656 // We can see racers trying to place the same native function into place. Once | |
| 657 // is plenty. | |
| 658 address current = *native_function; | |
| 659 if (current == function) return; | |
| 660 if (post_event_flag && JvmtiExport::should_post_native_method_bind() && | |
| 661 function != NULL) { | |
| 662 // native_method_throw_unsatisfied_link_error_entry() should only | |
| 663 // be passed when post_event_flag is false. | |
| 664 assert(function != | |
| 665 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
| 666 "post_event_flag mis-match"); | |
| 667 | |
| 668 // post the bind event, and possible change the bind function | |
| 669 JvmtiExport::post_native_method_bind(this, &function); | |
| 670 } | |
| 671 *native_function = function; | |
| 672 // This function can be called more than once. We must make sure that we always | |
| 673 // use the latest registered method -> check if a stub already has been generated. | |
| 674 // If so, we have to make it not_entrant. | |
| 675 nmethod* nm = code(); // Put it into local variable to guard against concurrent updates | |
| 676 if (nm != NULL) { | |
| 677 nm->make_not_entrant(); | |
| 678 } | |
| 679 } | |
| 680 | |
| 681 | |
|
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682 bool Method::has_native_function() const { |
|
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683 if (is_method_handle_intrinsic()) |
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|
684 return false; // special-cased in SharedRuntime::generate_native_wrapper |
| 0 | 685 address func = native_function(); |
| 686 return (func != NULL && func != SharedRuntime::native_method_throw_unsatisfied_link_error_entry()); | |
| 687 } | |
| 688 | |
| 689 | |
|
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690 void Method::clear_native_function() { |
|
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|
691 // Note: is_method_handle_intrinsic() is allowed here. |
| 0 | 692 set_native_function( |
| 693 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
| 694 !native_bind_event_is_interesting); | |
| 695 clear_code(); | |
| 696 } | |
| 697 | |
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698 address Method::critical_native_function() { |
|
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699 methodHandle mh(this); |
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700 return NativeLookup::lookup_critical_entry(mh); |
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|
701 } |
|
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702 |
| 0 | 703 |
|
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704 void Method::set_signature_handler(address handler) { |
| 0 | 705 address* signature_handler = signature_handler_addr(); |
| 706 *signature_handler = handler; | |
| 707 } | |
| 708 | |
| 709 | |
| 7998 | 710 void Method::print_made_not_compilable(int comp_level, bool is_osr, bool report, const char* reason) { |
|
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|
711 if (PrintCompilation && report) { |
|
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|
712 ttyLocker ttyl; |
|
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|
713 tty->print("made not %scompilable on ", is_osr ? "OSR " : ""); |
|
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714 if (comp_level == CompLevel_all) { |
|
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|
715 tty->print("all levels "); |
|
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716 } else { |
|
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717 tty->print("levels "); |
|
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|
718 for (int i = (int)CompLevel_none; i <= comp_level; i++) { |
|
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719 tty->print("%d ", i); |
|
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720 } |
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721 } |
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722 this->print_short_name(tty); |
|
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723 int size = this->code_size(); |
| 7998 | 724 if (size > 0) { |
|
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725 tty->print(" (%d bytes)", size); |
| 7998 | 726 } |
| 727 if (reason != NULL) { | |
| 728 tty->print(" %s", reason); | |
| 729 } | |
|
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730 tty->cr(); |
|
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731 } |
| 0 | 732 if ((TraceDeoptimization || LogCompilation) && (xtty != NULL)) { |
| 733 ttyLocker ttyl; | |
|
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|
734 xtty->begin_elem("make_not_compilable thread='" UINTX_FORMAT "' osr='%d' level='%d'", |
|
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|
735 os::current_thread_id(), is_osr, comp_level); |
| 7998 | 736 if (reason != NULL) { |
| 737 xtty->print(" reason=\'%s\'", reason); | |
| 738 } | |
|
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739 xtty->method(this); |
| 0 | 740 xtty->stamp(); |
| 741 xtty->end_elem(); | |
| 742 } | |
|
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743 } |
|
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744 |
|
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745 bool Method::is_always_compilable() const { |
|
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746 // Generated adapters must be compiled |
|
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747 if (is_method_handle_intrinsic() && is_synthetic()) { |
|
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748 assert(!is_not_c1_compilable(), "sanity check"); |
|
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749 assert(!is_not_c2_compilable(), "sanity check"); |
|
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750 return true; |
|
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751 } |
|
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752 |
|
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753 return false; |
|
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754 } |
|
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|
755 |
|
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756 bool Method::is_not_compilable(int comp_level) const { |
|
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757 if (number_of_breakpoints() > 0) |
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758 return true; |
|
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759 if (is_always_compilable()) |
|
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|
760 return false; |
|
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761 if (comp_level == CompLevel_any) |
|
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762 return is_not_c1_compilable() || is_not_c2_compilable(); |
|
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763 if (is_c1_compile(comp_level)) |
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764 return is_not_c1_compilable(); |
|
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765 if (is_c2_compile(comp_level)) |
|
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766 return is_not_c2_compilable(); |
|
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767 return false; |
|
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|
768 } |
|
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|
769 |
|
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|
770 // call this when compiler finds that this method is not compilable |
| 7998 | 771 void Method::set_not_compilable(int comp_level, bool report, const char* reason) { |
|
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772 if (is_always_compilable()) { |
|
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773 // Don't mark a method which should be always compilable |
|
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774 return; |
|
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775 } |
| 7998 | 776 print_made_not_compilable(comp_level, /*is_osr*/ false, report, reason); |
| 1783 | 777 if (comp_level == CompLevel_all) { |
| 778 set_not_c1_compilable(); | |
| 779 set_not_c2_compilable(); | |
| 780 } else { | |
|
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781 if (is_c1_compile(comp_level)) |
| 1783 | 782 set_not_c1_compilable(); |
|
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|
783 if (is_c2_compile(comp_level)) |
|
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|
784 set_not_c2_compilable(); |
|
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785 } |
|
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|
786 CompilationPolicy::policy()->disable_compilation(this); |
| 12073 | 787 assert(!CompilationPolicy::can_be_compiled(this, comp_level), "sanity check"); |
|
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788 } |
|
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|
789 |
|
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|
790 bool Method::is_not_osr_compilable(int comp_level) const { |
|
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791 if (is_not_compilable(comp_level)) |
|
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|
792 return true; |
|
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|
793 if (comp_level == CompLevel_any) |
|
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|
794 return is_not_c1_osr_compilable() || is_not_c2_osr_compilable(); |
|
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|
795 if (is_c1_compile(comp_level)) |
|
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|
796 return is_not_c1_osr_compilable(); |
|
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797 if (is_c2_compile(comp_level)) |
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798 return is_not_c2_osr_compilable(); |
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|
799 return false; |
|
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|
800 } |
|
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801 |
| 7998 | 802 void Method::set_not_osr_compilable(int comp_level, bool report, const char* reason) { |
| 803 print_made_not_compilable(comp_level, /*is_osr*/ true, report, reason); | |
|
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804 if (comp_level == CompLevel_all) { |
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|
805 set_not_c1_osr_compilable(); |
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806 set_not_c2_osr_compilable(); |
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807 } else { |
|
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|
808 if (is_c1_compile(comp_level)) |
|
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|
809 set_not_c1_osr_compilable(); |
|
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|
810 if (is_c2_compile(comp_level)) |
|
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|
811 set_not_c2_osr_compilable(); |
| 0 | 812 } |
| 1783 | 813 CompilationPolicy::policy()->disable_compilation(this); |
| 12073 | 814 assert(!CompilationPolicy::can_be_osr_compiled(this, comp_level), "sanity check"); |
| 0 | 815 } |
| 816 | |
| 817 // Revert to using the interpreter and clear out the nmethod | |
|
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818 void Method::clear_code() { |
| 0 | 819 |
| 820 // this may be NULL if c2i adapters have not been made yet | |
| 821 // Only should happen at allocate time. | |
| 822 if (_adapter == NULL) { | |
| 823 _from_compiled_entry = NULL; | |
| 824 } else { | |
| 825 _from_compiled_entry = _adapter->get_c2i_entry(); | |
| 826 } | |
| 827 OrderAccess::storestore(); | |
| 828 _from_interpreted_entry = _i2i_entry; | |
| 829 OrderAccess::storestore(); | |
| 830 _code = NULL; | |
| 831 } | |
| 832 | |
| 833 // Called by class data sharing to remove any entry points (which are not shared) | |
|
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834 void Method::unlink_method() { |
| 0 | 835 _code = NULL; |
| 836 _i2i_entry = NULL; | |
| 837 _from_interpreted_entry = NULL; | |
| 838 if (is_native()) { | |
| 839 *native_function_addr() = NULL; | |
| 840 set_signature_handler(NULL); | |
| 841 } | |
| 842 NOT_PRODUCT(set_compiled_invocation_count(0);) | |
| 843 _adapter = NULL; | |
| 844 _from_compiled_entry = NULL; | |
|
8751
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|
845 |
|
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846 // In case of DumpSharedSpaces, _method_data should always be NULL. |
|
1fc4d4768b90
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|
847 // |
|
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|
848 // During runtime (!DumpSharedSpaces), when we are cleaning a |
|
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|
849 // shared class that failed to load, this->link_method() may |
|
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850 // have already been called (before an exception happened), so |
|
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851 // this->_method_data may not be NULL. |
|
1fc4d4768b90
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852 assert(!DumpSharedSpaces || _method_data == NULL, "unexpected method data?"); |
|
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|
853 |
| 0 | 854 set_method_data(NULL); |
|
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|
855 set_method_counters(NULL); |
| 0 | 856 } |
| 857 | |
| 858 // Called when the method_holder is getting linked. Setup entrypoints so the method | |
| 859 // is ready to be called from interpreter, compiler, and vtables. | |
|
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860 void Method::link_method(methodHandle h_method, TRAPS) { |
| 3748 | 861 // If the code cache is full, we may reenter this function for the |
| 862 // leftover methods that weren't linked. | |
| 863 if (_i2i_entry != NULL) return; | |
| 864 | |
| 0 | 865 assert(_adapter == NULL, "init'd to NULL" ); |
| 866 assert( _code == NULL, "nothing compiled yet" ); | |
| 867 | |
| 868 // Setup interpreter entrypoint | |
| 869 assert(this == h_method(), "wrong h_method()" ); | |
| 870 address entry = Interpreter::entry_for_method(h_method); | |
| 871 assert(entry != NULL, "interpreter entry must be non-null"); | |
| 872 // Sets both _i2i_entry and _from_interpreted_entry | |
| 873 set_interpreter_entry(entry); | |
|
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|
874 |
|
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|
875 // Don't overwrite already registered native entries. |
|
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|
876 if (is_native() && !has_native_function()) { |
| 0 | 877 set_native_function( |
| 878 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
| 879 !native_bind_event_is_interesting); | |
| 880 } | |
| 881 | |
| 882 // Setup compiler entrypoint. This is made eagerly, so we do not need | |
| 883 // special handling of vtables. An alternative is to make adapters more | |
| 884 // lazily by calling make_adapter() from from_compiled_entry() for the | |
| 885 // normal calls. For vtable calls life gets more complicated. When a | |
| 886 // call-site goes mega-morphic we need adapters in all methods which can be | |
| 887 // called from the vtable. We need adapters on such methods that get loaded | |
| 888 // later. Ditto for mega-morphic itable calls. If this proves to be a | |
| 889 // problem we'll make these lazily later. | |
|
3749
9dd6c4ba364f
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|
890 (void) make_adapters(h_method, CHECK); |
| 0 | 891 |
| 892 // ONLY USE the h_method now as make_adapter may have blocked | |
| 893 | |
| 894 } | |
| 895 | |
|
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896 address Method::make_adapters(methodHandle mh, TRAPS) { |
| 0 | 897 // Adapters for compiled code are made eagerly here. They are fairly |
| 898 // small (generally < 100 bytes) and quick to make (and cached and shared) | |
| 899 // so making them eagerly shouldn't be too expensive. | |
| 900 AdapterHandlerEntry* adapter = AdapterHandlerLibrary::get_adapter(mh); | |
| 901 if (adapter == NULL ) { | |
|
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|
902 THROW_MSG_NULL(vmSymbols::java_lang_VirtualMachineError(), "out of space in CodeCache for adapters"); |
| 0 | 903 } |
| 904 | |
| 905 mh->set_adapter_entry(adapter); | |
| 906 mh->_from_compiled_entry = adapter->get_c2i_entry(); | |
| 907 return adapter->get_c2i_entry(); | |
| 908 } | |
| 909 | |
|
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910 void Method::restore_unshareable_info(TRAPS) { |
|
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911 // Since restore_unshareable_info can be called more than once for a method, don't |
|
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|
912 // redo any work. If this field is restored, there is nothing to do. |
|
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913 if (_from_compiled_entry == NULL) { |
|
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914 // restore method's vtable by calling a virtual function |
|
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|
915 restore_vtable(); |
|
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916 |
|
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|
917 methodHandle mh(THREAD, this); |
|
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|
918 link_method(mh, CHECK); |
|
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919 } |
|
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920 } |
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921 |
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922 |
| 0 | 923 // The verified_code_entry() must be called when a invoke is resolved |
| 924 // on this method. | |
| 925 | |
| 926 // It returns the compiled code entry point, after asserting not null. | |
| 927 // This function is called after potential safepoints so that nmethod | |
| 928 // or adapter that it points to is still live and valid. | |
| 929 // This function must not hit a safepoint! | |
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930 address Method::verified_code_entry() { |
| 0 | 931 debug_only(No_Safepoint_Verifier nsv;) |
| 932 assert(_from_compiled_entry != NULL, "must be set"); | |
| 933 return _from_compiled_entry; | |
| 934 } | |
| 935 | |
| 936 // Check that if an nmethod ref exists, it has a backlink to this or no backlink at all | |
| 937 // (could be racing a deopt). | |
| 938 // Not inline to avoid circular ref. | |
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939 bool Method::check_code() const { |
| 0 | 940 // cached in a register or local. There's a race on the value of the field. |
| 941 nmethod *code = (nmethod *)OrderAccess::load_ptr_acquire(&_code); | |
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942 return code == NULL || (code->method() == NULL) || (code->method() == (Method*)this && !code->is_osr_method()); |
| 0 | 943 } |
| 944 | |
| 945 // Install compiled code. Instantly it can execute. | |
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946 void Method::set_code(methodHandle mh, nmethod *code) { |
| 0 | 947 assert( code, "use clear_code to remove code" ); |
| 948 assert( mh->check_code(), "" ); | |
| 949 | |
| 950 guarantee(mh->adapter() != NULL, "Adapter blob must already exist!"); | |
| 951 | |
| 952 // These writes must happen in this order, because the interpreter will | |
| 953 // directly jump to from_interpreted_entry which jumps to an i2c adapter | |
| 954 // which jumps to _from_compiled_entry. | |
| 955 mh->_code = code; // Assign before allowing compiled code to exec | |
| 956 | |
| 957 int comp_level = code->comp_level(); | |
| 958 // In theory there could be a race here. In practice it is unlikely | |
| 959 // and not worth worrying about. | |
| 1783 | 960 if (comp_level > mh->highest_comp_level()) { |
| 961 mh->set_highest_comp_level(comp_level); | |
| 0 | 962 } |
| 963 | |
| 964 OrderAccess::storestore(); | |
| 1692 | 965 #ifdef SHARK |
|
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966 mh->_from_interpreted_entry = code->insts_begin(); |
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967 #else //!SHARK |
| 0 | 968 mh->_from_compiled_entry = code->verified_entry_point(); |
| 969 OrderAccess::storestore(); | |
| 970 // Instantly compiled code can execute. | |
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971 if (!mh->is_method_handle_intrinsic()) |
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972 mh->_from_interpreted_entry = mh->get_i2c_entry(); |
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973 #endif //!SHARK |
| 0 | 974 } |
| 975 | |
| 976 | |
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977 bool Method::is_overridden_in(Klass* k) const { |
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978 InstanceKlass* ik = InstanceKlass::cast(k); |
| 0 | 979 |
| 980 if (ik->is_interface()) return false; | |
| 981 | |
| 982 // If method is an interface, we skip it - except if it | |
| 983 // is a miranda method | |
|
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984 if (method_holder()->is_interface()) { |
| 0 | 985 // Check that method is not a miranda method |
| 986 if (ik->lookup_method(name(), signature()) == NULL) { | |
| 987 // No implementation exist - so miranda method | |
| 988 return false; | |
| 989 } | |
| 990 return true; | |
| 991 } | |
| 992 | |
| 993 assert(ik->is_subclass_of(method_holder()), "should be subklass"); | |
| 994 assert(ik->vtable() != NULL, "vtable should exist"); | |
|
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995 if (!has_vtable_index()) { |
| 0 | 996 return false; |
| 997 } else { | |
|
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998 Method* vt_m = ik->method_at_vtable(vtable_index()); |
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999 return vt_m != this; |
| 0 | 1000 } |
| 1001 } | |
| 1002 | |
| 1003 | |
|
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1004 // give advice about whether this Method* should be cached or not |
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1005 bool Method::should_not_be_cached() const { |
|
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1006 if (is_old()) { |
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1007 // This method has been redefined. It is either EMCP or obsolete |
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1008 // and we don't want to cache it because that would pin the method |
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1009 // down and prevent it from being collectible if and when it |
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1010 // finishes executing. |
|
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1011 return true; |
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1012 } |
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1013 |
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1014 // caching this method should be just fine |
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1015 return false; |
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1016 } |
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1017 |
|
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1018 |
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1019 /** |
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1020 * Returns true if this is one of the specially treated methods for |
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1021 * security related stack walks (like Reflection.getCallerClass). |
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1022 */ |
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1023 bool Method::is_ignored_by_security_stack_walk() const { |
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1024 const bool use_new_reflection = JDK_Version::is_gte_jdk14x_version() && UseNewReflection; |
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1025 |
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1026 if (intrinsic_id() == vmIntrinsics::_invoke) { |
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1027 // This is Method.invoke() -- ignore it |
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1028 return true; |
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1029 } |
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1030 if (use_new_reflection && |
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1031 method_holder()->is_subclass_of(SystemDictionary::reflect_MethodAccessorImpl_klass())) { |
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1032 // This is an auxilary frame -- ignore it |
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1033 return true; |
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1034 } |
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1035 if (is_method_handle_intrinsic() || is_compiled_lambda_form()) { |
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1036 // This is an internal adapter frame for method handles -- ignore it |
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1037 return true; |
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1038 } |
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1039 return false; |
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1040 } |
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1041 |
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1042 |
| 710 | 1043 // Constant pool structure for invoke methods: |
| 1044 enum { | |
|
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1045 _imcp_invoke_name = 1, // utf8: 'invokeExact', etc. |
|
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1046 _imcp_invoke_signature, // utf8: (variable Symbol*) |
| 710 | 1047 _imcp_limit |
| 1048 }; | |
| 1049 | |
|
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1050 // Test if this method is an MH adapter frame generated by Java code. |
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1051 // Cf. java/lang/invoke/InvokerBytecodeGenerator |
|
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1052 bool Method::is_compiled_lambda_form() const { |
|
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1053 return intrinsic_id() == vmIntrinsics::_compiledLambdaForm; |
| 710 | 1054 } |
| 1055 | |
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1056 // Test if this method is an internal MH primitive method. |
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1057 bool Method::is_method_handle_intrinsic() const { |
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1058 vmIntrinsics::ID iid = intrinsic_id(); |
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1059 return (MethodHandles::is_signature_polymorphic(iid) && |
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1060 MethodHandles::is_signature_polymorphic_intrinsic(iid)); |
|
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1061 } |
|
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1062 |
|
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1063 bool Method::has_member_arg() const { |
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1064 vmIntrinsics::ID iid = intrinsic_id(); |
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1065 return (MethodHandles::is_signature_polymorphic(iid) && |
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1066 MethodHandles::has_member_arg(iid)); |
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1067 } |
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1068 |
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1069 // Make an instance of a signature-polymorphic internal MH primitive. |
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1070 methodHandle Method::make_method_handle_intrinsic(vmIntrinsics::ID iid, |
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1071 Symbol* signature, |
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1072 TRAPS) { |
|
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1073 ResourceMark rm; |
| 710 | 1074 methodHandle empty; |
| 1075 | |
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1076 KlassHandle holder = SystemDictionary::MethodHandle_klass(); |
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1077 Symbol* name = MethodHandles::signature_polymorphic_intrinsic_name(iid); |
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1078 assert(iid == MethodHandles::signature_polymorphic_name_id(name), ""); |
| 710 | 1079 if (TraceMethodHandles) { |
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1080 tty->print_cr("make_method_handle_intrinsic MH.%s%s", name->as_C_string(), signature->as_C_string()); |
| 710 | 1081 } |
| 1082 | |
|
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1083 // invariant: cp->symbol_at_put is preceded by a refcount increment (more usually a lookup) |
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1084 name->increment_refcount(); |
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1085 signature->increment_refcount(); |
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1086 |
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1087 int cp_length = _imcp_limit; |
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1088 ClassLoaderData* loader_data = holder->class_loader_data(); |
| 710 | 1089 constantPoolHandle cp; |
| 1090 { | |
|
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1091 ConstantPool* cp_oop = ConstantPool::allocate(loader_data, cp_length, CHECK_(empty)); |
| 710 | 1092 cp = constantPoolHandle(THREAD, cp_oop); |
| 1093 } | |
|
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1094 cp->set_pool_holder(InstanceKlass::cast(holder())); |
|
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1095 cp->symbol_at_put(_imcp_invoke_name, name); |
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1096 cp->symbol_at_put(_imcp_invoke_signature, signature); |
|
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1097 cp->set_has_preresolution(); |
| 710 | 1098 |
|
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1099 // decide on access bits: public or not? |
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1100 int flags_bits = (JVM_ACC_NATIVE | JVM_ACC_SYNTHETIC | JVM_ACC_FINAL); |
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1101 bool must_be_static = MethodHandles::is_signature_polymorphic_static(iid); |
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1102 if (must_be_static) flags_bits |= JVM_ACC_STATIC; |
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1103 assert((flags_bits & JVM_ACC_PUBLIC) == 0, "do not expose these methods"); |
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1104 |
| 710 | 1105 methodHandle m; |
| 1106 { | |
| 8031 | 1107 InlineTableSizes sizes; |
|
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1108 Method* m_oop = Method::allocate(loader_data, 0, |
| 8031 | 1109 accessFlags_from(flags_bits), &sizes, |
|
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1110 ConstMethod::NORMAL, CHECK_(empty)); |
| 710 | 1111 m = methodHandle(THREAD, m_oop); |
| 1112 } | |
| 1113 m->set_constants(cp()); | |
| 1114 m->set_name_index(_imcp_invoke_name); | |
| 1115 m->set_signature_index(_imcp_invoke_signature); | |
|
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1116 assert(MethodHandles::is_signature_polymorphic_name(m->name()), ""); |
|
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1117 assert(m->signature() == signature, ""); |
| 710 | 1118 #ifdef CC_INTERP |
|
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1119 ResultTypeFinder rtf(signature); |
| 710 | 1120 m->set_result_index(rtf.type()); |
| 1121 #endif | |
| 1122 m->compute_size_of_parameters(THREAD); | |
|
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1123 m->init_intrinsic_id(); |
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1124 assert(m->is_method_handle_intrinsic(), ""); |
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1125 #ifdef ASSERT |
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1126 if (!MethodHandles::is_signature_polymorphic(m->intrinsic_id())) m->print(); |
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1127 assert(MethodHandles::is_signature_polymorphic(m->intrinsic_id()), "must be an invoker"); |
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1128 assert(m->intrinsic_id() == iid, "correctly predicted iid"); |
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1129 #endif //ASSERT |
| 710 | 1130 |
| 1131 // Finally, set up its entry points. | |
| 1132 assert(m->can_be_statically_bound(), ""); | |
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1133 m->set_vtable_index(Method::nonvirtual_vtable_index); |
| 710 | 1134 m->link_method(m, CHECK_(empty)); |
| 1135 | |
|
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1136 if (TraceMethodHandles && (Verbose || WizardMode)) |
| 710 | 1137 m->print_on(tty); |
| 1138 | |
| 1139 return m; | |
| 1140 } | |
| 1141 | |
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1142 Klass* Method::check_non_bcp_klass(Klass* klass) { |
| 6983 | 1143 if (klass != NULL && klass->class_loader() != NULL) { |
| 1144 if (klass->oop_is_objArray()) | |
|
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1145 klass = ObjArrayKlass::cast(klass)->bottom_klass(); |
|
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1146 return klass; |
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1147 } |
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1148 return NULL; |
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1149 } |
| 710 | 1150 |
|
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1151 |
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1152 methodHandle Method::clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length, |
| 0 | 1153 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS) { |
| 1154 // Code below does not work for native methods - they should never get rewritten anyway | |
| 1155 assert(!m->is_native(), "cannot rewrite native methods"); | |
|
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1156 // Allocate new Method* |
| 0 | 1157 AccessFlags flags = m->access_flags(); |
| 8031 | 1158 |
| 1159 ConstMethod* cm = m->constMethod(); | |
| 1160 int checked_exceptions_len = cm->checked_exceptions_length(); | |
| 1161 int localvariable_len = cm->localvariable_table_length(); | |
| 1162 int exception_table_len = cm->exception_table_length(); | |
| 1163 int method_parameters_len = cm->method_parameters_length(); | |
| 1164 int method_annotations_len = cm->method_annotations_length(); | |
| 1165 int parameter_annotations_len = cm->parameter_annotations_length(); | |
| 1166 int type_annotations_len = cm->type_annotations_length(); | |
| 1167 int default_annotations_len = cm->default_annotations_length(); | |
| 1168 | |
| 1169 InlineTableSizes sizes( | |
| 1170 localvariable_len, | |
| 1171 new_compressed_linenumber_size, | |
| 1172 exception_table_len, | |
| 1173 checked_exceptions_len, | |
| 1174 method_parameters_len, | |
| 1175 cm->generic_signature_index(), | |
| 1176 method_annotations_len, | |
| 1177 parameter_annotations_len, | |
| 1178 type_annotations_len, | |
| 1179 default_annotations_len, | |
| 1180 0); | |
|
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1181 |
| 6934 | 1182 ClassLoaderData* loader_data = m->method_holder()->class_loader_data(); |
|
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1183 Method* newm_oop = Method::allocate(loader_data, |
| 6934 | 1184 new_code_length, |
| 1185 flags, | |
| 8031 | 1186 &sizes, |
| 6934 | 1187 m->method_type(), |
| 1188 CHECK_(methodHandle())); | |
| 0 | 1189 methodHandle newm (THREAD, newm_oop); |
| 1190 int new_method_size = newm->method_size(); | |
|
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1191 |
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1192 // Create a shallow copy of Method part, but be careful to preserve the new ConstMethod* |
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1193 ConstMethod* newcm = newm->constMethod(); |
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1194 int new_const_method_size = newm->constMethod()->size(); |
|
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1195 |
|
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1196 memcpy(newm(), m(), sizeof(Method)); |
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1197 |
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1198 // Create shallow copy of ConstMethod. |
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1199 memcpy(newcm, m->constMethod(), sizeof(ConstMethod)); |
|
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|
1200 |
| 0 | 1201 // Reset correct method/const method, method size, and parameter info |
| 1202 newm->set_constMethod(newcm); | |
| 1203 newm->constMethod()->set_code_size(new_code_length); | |
| 1204 newm->constMethod()->set_constMethod_size(new_const_method_size); | |
| 1205 newm->set_method_size(new_method_size); | |
| 1206 assert(newm->code_size() == new_code_length, "check"); | |
|
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1207 assert(newm->method_parameters_length() == method_parameters_len, "check"); |
| 0 | 1208 assert(newm->checked_exceptions_length() == checked_exceptions_len, "check"); |
|
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1209 assert(newm->exception_table_length() == exception_table_len, "check"); |
| 0 | 1210 assert(newm->localvariable_table_length() == localvariable_len, "check"); |
| 1211 // Copy new byte codes | |
| 1212 memcpy(newm->code_base(), new_code, new_code_length); | |
| 1213 // Copy line number table | |
| 1214 if (new_compressed_linenumber_size > 0) { | |
| 1215 memcpy(newm->compressed_linenumber_table(), | |
| 1216 new_compressed_linenumber_table, | |
| 1217 new_compressed_linenumber_size); | |
| 1218 } | |
|
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1219 // Copy method_parameters |
|
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|
1220 if (method_parameters_len > 0) { |
|
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|
1221 memcpy(newm->method_parameters_start(), |
|
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|
1222 m->method_parameters_start(), |
|
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|
1223 method_parameters_len * sizeof(MethodParametersElement)); |
|
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|
1224 } |
| 0 | 1225 // Copy checked_exceptions |
| 1226 if (checked_exceptions_len > 0) { | |
| 1227 memcpy(newm->checked_exceptions_start(), | |
| 1228 m->checked_exceptions_start(), | |
| 1229 checked_exceptions_len * sizeof(CheckedExceptionElement)); | |
| 1230 } | |
|
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|
1231 // Copy exception table |
|
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|
1232 if (exception_table_len > 0) { |
|
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|
1233 memcpy(newm->exception_table_start(), |
|
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|
1234 m->exception_table_start(), |
|
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|
1235 exception_table_len * sizeof(ExceptionTableElement)); |
|
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|
1236 } |
| 0 | 1237 // Copy local variable number table |
| 1238 if (localvariable_len > 0) { | |
| 1239 memcpy(newm->localvariable_table_start(), | |
| 1240 m->localvariable_table_start(), | |
| 1241 localvariable_len * sizeof(LocalVariableTableElement)); | |
| 1242 } | |
|
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1243 // Copy stackmap table |
|
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|
1244 if (m->has_stackmap_table()) { |
|
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|
1245 int code_attribute_length = m->stackmap_data()->length(); |
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1246 Array<u1>* stackmap_data = |
|
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1247 MetadataFactory::new_array<u1>(loader_data, code_attribute_length, 0, CHECK_NULL); |
|
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1248 memcpy((void*)stackmap_data->adr_at(0), |
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1249 (void*)m->stackmap_data()->adr_at(0), code_attribute_length); |
|
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1250 newm->set_stackmap_data(stackmap_data); |
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1251 } |
|
518
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|
1252 |
|
8837
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8009531: Crash when redefining class with annotated method
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|
1253 // copy annotations over to new method |
|
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|
1254 newcm->copy_annotations_from(cm); |
| 0 | 1255 return newm; |
| 1256 } | |
| 1257 | |
|
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1258 vmSymbols::SID Method::klass_id_for_intrinsics(Klass* holder) { |
| 0 | 1259 // if loader is not the default loader (i.e., != NULL), we can't know the intrinsics |
| 1260 // because we are not loading from core libraries | |
| 6894 | 1261 // exception: the AES intrinsics come from lib/ext/sunjce_provider.jar |
| 1262 // which does not use the class default class loader so we check for its loader here | |
|
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|
1263 InstanceKlass* ik = InstanceKlass::cast(holder); |
|
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1264 if ((ik->class_loader() != NULL) && !SystemDictionary::is_ext_class_loader(ik->class_loader())) { |
|
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|
1265 return vmSymbols::NO_SID; // regardless of name, no intrinsics here |
| 6894 | 1266 } |
| 0 | 1267 |
| 1268 // see if the klass name is well-known: | |
|
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1269 Symbol* klass_name = ik->name(); |
|
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|
1270 return vmSymbols::find_sid(klass_name); |
|
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|
1271 } |
|
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|
1272 |
|
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1273 void Method::init_intrinsic_id() { |
|
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|
1274 assert(_intrinsic_id == vmIntrinsics::_none, "do this just once"); |
|
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|
1275 const uintptr_t max_id_uint = right_n_bits((int)(sizeof(_intrinsic_id) * BitsPerByte)); |
|
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|
1276 assert((uintptr_t)vmIntrinsics::ID_LIMIT <= max_id_uint, "else fix size"); |
|
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|
1277 assert(intrinsic_id_size_in_bytes() == sizeof(_intrinsic_id), ""); |
|
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1278 |
|
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1279 // the klass name is well-known: |
|
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|
1280 vmSymbols::SID klass_id = klass_id_for_intrinsics(method_holder()); |
|
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|
1281 assert(klass_id != vmSymbols::NO_SID, "caller responsibility"); |
| 0 | 1282 |
| 1283 // ditto for method and signature: | |
| 1284 vmSymbols::SID name_id = vmSymbols::find_sid(name()); | |
|
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1285 if (klass_id != vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_MethodHandle) |
|
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1286 && name_id == vmSymbols::NO_SID) |
|
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1287 return; |
| 0 | 1288 vmSymbols::SID sig_id = vmSymbols::find_sid(signature()); |
|
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|
1289 if (klass_id != vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_MethodHandle) |
|
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1290 && sig_id == vmSymbols::NO_SID) return; |
| 0 | 1291 jshort flags = access_flags().as_short(); |
| 1292 | |
|
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1293 vmIntrinsics::ID id = vmIntrinsics::find_id(klass_id, name_id, sig_id, flags); |
|
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1294 if (id != vmIntrinsics::_none) { |
|
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1295 set_intrinsic_id(id); |
|
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1296 return; |
|
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|
1297 } |
|
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1298 |
| 0 | 1299 // A few slightly irregular cases: |
| 1300 switch (klass_id) { | |
| 1301 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_StrictMath): | |
| 1302 // Second chance: check in regular Math. | |
| 1303 switch (name_id) { | |
| 1304 case vmSymbols::VM_SYMBOL_ENUM_NAME(min_name): | |
| 1305 case vmSymbols::VM_SYMBOL_ENUM_NAME(max_name): | |
| 1306 case vmSymbols::VM_SYMBOL_ENUM_NAME(sqrt_name): | |
| 1307 // pretend it is the corresponding method in the non-strict class: | |
| 1308 klass_id = vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_Math); | |
|
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1309 id = vmIntrinsics::find_id(klass_id, name_id, sig_id, flags); |
| 0 | 1310 break; |
| 1311 } | |
|
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1312 break; |
|
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|
1313 |
|
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1314 // Signature-polymorphic methods: MethodHandle.invoke*, InvokeDynamic.*. |
|
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1315 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_MethodHandle): |
|
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1316 if (!is_native()) break; |
|
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1317 id = MethodHandles::signature_polymorphic_name_id(method_holder(), name()); |
|
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1318 if (is_static() != MethodHandles::is_signature_polymorphic_static(id)) |
|
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1319 id = vmIntrinsics::_none; |
|
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1320 break; |
| 0 | 1321 } |
| 1322 | |
|
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1323 if (id != vmIntrinsics::_none) { |
|
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1324 // Set up its iid. It is an alias method. |
|
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1325 set_intrinsic_id(id); |
|
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1326 return; |
|
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|
1327 } |
| 0 | 1328 } |
| 1329 | |
|
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1330 // These two methods are static since a GC may move the Method |
|
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1331 bool Method::load_signature_classes(methodHandle m, TRAPS) { |
|
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1332 if (THREAD->is_Compiler_thread()) { |
|
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1333 // There is nothing useful this routine can do from within the Compile thread. |
|
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1334 // Hopefully, the signature contains only well-known classes. |
|
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1335 // We could scan for this and return true/false, but the caller won't care. |
|
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1336 return false; |
|
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|
1337 } |
| 0 | 1338 bool sig_is_loaded = true; |
|
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1339 Handle class_loader(THREAD, m->method_holder()->class_loader()); |
|
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1340 Handle protection_domain(THREAD, m->method_holder()->protection_domain()); |
|
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1341 ResourceMark rm(THREAD); |
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1342 Symbol* signature = m->signature(); |
| 0 | 1343 for(SignatureStream ss(signature); !ss.is_done(); ss.next()) { |
| 1344 if (ss.is_object()) { | |
|
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1345 Symbol* sym = ss.as_symbol(CHECK_(false)); |
|
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1346 Symbol* name = sym; |
|
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1347 Klass* klass = SystemDictionary::resolve_or_null(name, class_loader, |
| 0 | 1348 protection_domain, THREAD); |
|
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1349 // We are loading classes eagerly. If a ClassNotFoundException or |
|
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1350 // a LinkageError was generated, be sure to ignore it. |
| 0 | 1351 if (HAS_PENDING_EXCEPTION) { |
| 1142 | 1352 if (PENDING_EXCEPTION->is_a(SystemDictionary::ClassNotFoundException_klass()) || |
| 1353 PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) { | |
| 0 | 1354 CLEAR_PENDING_EXCEPTION; |
| 1355 } else { | |
| 1356 return false; | |
| 1357 } | |
| 1358 } | |
| 1359 if( klass == NULL) { sig_is_loaded = false; } | |
| 1360 } | |
| 1361 } | |
| 1362 return sig_is_loaded; | |
| 1363 } | |
| 1364 | |
|
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1365 bool Method::has_unloaded_classes_in_signature(methodHandle m, TRAPS) { |
|
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1366 Handle class_loader(THREAD, m->method_holder()->class_loader()); |
|
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1367 Handle protection_domain(THREAD, m->method_holder()->protection_domain()); |
|
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1368 ResourceMark rm(THREAD); |
|
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1369 Symbol* signature = m->signature(); |
| 0 | 1370 for(SignatureStream ss(signature); !ss.is_done(); ss.next()) { |
| 1371 if (ss.type() == T_OBJECT) { | |
|
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1372 Symbol* name = ss.as_symbol_or_null(); |
|
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1373 if (name == NULL) return true; |
|
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1374 Klass* klass = SystemDictionary::find(name, class_loader, protection_domain, THREAD); |
| 0 | 1375 if (klass == NULL) return true; |
| 1376 } | |
| 1377 } | |
| 1378 return false; | |
| 1379 } | |
| 1380 | |
| 1381 // Exposed so field engineers can debug VM | |
|
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1382 void Method::print_short_name(outputStream* st) { |
| 0 | 1383 ResourceMark rm; |
| 1384 #ifdef PRODUCT | |
|
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1385 st->print(" %s::", method_holder()->external_name()); |
| 0 | 1386 #else |
|
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1387 st->print(" %s::", method_holder()->internal_name()); |
| 0 | 1388 #endif |
| 1389 name()->print_symbol_on(st); | |
| 1390 if (WizardMode) signature()->print_symbol_on(st); | |
|
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1391 else if (MethodHandles::is_signature_polymorphic(intrinsic_id())) |
|
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1392 MethodHandles::print_as_basic_type_signature_on(st, signature(), true); |
| 0 | 1393 } |
| 1394 | |
| 3779 | 1395 // Comparer for sorting an object array containing |
|
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1396 // Method*s. |
|
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1397 static int method_comparator(Method* a, Method* b) { |
|
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1398 return a->name()->fast_compare(b->name()); |
|
3929
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|
1399 } |
| 0 | 1400 |
| 1401 // This is only done during class loading, so it is OK to assume method_idnum matches the methods() array | |
|
12823
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1402 // default_methods also uses this without the ordering for fast find_method |
|
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|
1403 void Method::sort_methods(Array<Method*>* methods, bool idempotent, bool set_idnums) { |
| 0 | 1404 int length = methods->length(); |
| 1405 if (length > 1) { | |
| 3779 | 1406 { |
| 1407 No_Safepoint_Verifier nsv; | |
|
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1408 QuickSort::sort<Method*>(methods->data(), length, method_comparator, idempotent); |
| 0 | 1409 } |
| 1410 // Reset method ordering | |
|
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1411 if (set_idnums) { |
|
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1412 for (int i = 0; i < length; i++) { |
|
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|
1413 Method* m = methods->at(i); |
|
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|
1414 m->set_method_idnum(i); |
|
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1415 } |
| 0 | 1416 } |
| 1417 } | |
| 1418 } | |
| 1419 | |
| 1420 //----------------------------------------------------------------------------------- | |
|
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1421 // Non-product code unless JVM/TI needs it |
| 0 | 1422 |
|
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1423 #if !defined(PRODUCT) || INCLUDE_JVMTI |
| 0 | 1424 class SignatureTypePrinter : public SignatureTypeNames { |
| 1425 private: | |
| 1426 outputStream* _st; | |
| 1427 bool _use_separator; | |
| 1428 | |
| 1429 void type_name(const char* name) { | |
| 1430 if (_use_separator) _st->print(", "); | |
|
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1431 _st->print("%s", name); |
| 0 | 1432 _use_separator = true; |
| 1433 } | |
| 1434 | |
| 1435 public: | |
|
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1436 SignatureTypePrinter(Symbol* signature, outputStream* st) : SignatureTypeNames(signature) { |
| 0 | 1437 _st = st; |
| 1438 _use_separator = false; | |
| 1439 } | |
| 1440 | |
| 1441 void print_parameters() { _use_separator = false; iterate_parameters(); } | |
| 1442 void print_returntype() { _use_separator = false; iterate_returntype(); } | |
| 1443 }; | |
| 1444 | |
| 1445 | |
|
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1446 void Method::print_name(outputStream* st) { |
| 0 | 1447 Thread *thread = Thread::current(); |
| 1448 ResourceMark rm(thread); | |
| 1449 SignatureTypePrinter sig(signature(), st); | |
| 1450 st->print("%s ", is_static() ? "static" : "virtual"); | |
| 1451 sig.print_returntype(); | |
|
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1452 st->print(" %s.", method_holder()->internal_name()); |
| 0 | 1453 name()->print_symbol_on(st); |
| 1454 st->print("("); | |
| 1455 sig.print_parameters(); | |
| 1456 st->print(")"); | |
| 1457 } | |
|
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1458 #endif // !PRODUCT || INCLUDE_JVMTI |
| 0 | 1459 |
| 1460 | |
|
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|
1461 //----------------------------------------------------------------------------------- |
|
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1462 // Non-product code |
|
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1463 |
|
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|
1464 #ifndef PRODUCT |
|
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1465 void Method::print_codes_on(outputStream* st) const { |
| 0 | 1466 print_codes_on(0, code_size(), st); |
| 1467 } | |
| 1468 | |
|
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1469 void Method::print_codes_on(int from, int to, outputStream* st) const { |
| 0 | 1470 Thread *thread = Thread::current(); |
| 1471 ResourceMark rm(thread); | |
|
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1472 methodHandle mh (thread, (Method*)this); |
| 0 | 1473 BytecodeStream s(mh); |
| 1474 s.set_interval(from, to); | |
| 1475 BytecodeTracer::set_closure(BytecodeTracer::std_closure()); | |
| 1476 while (s.next() >= 0) BytecodeTracer::trace(mh, s.bcp(), st); | |
| 1477 } | |
| 1478 #endif // not PRODUCT | |
| 1479 | |
| 1480 | |
| 1481 // Simple compression of line number tables. We use a regular compressed stream, except that we compress deltas | |
| 1482 // between (bci,line) pairs since they are smaller. If (bci delta, line delta) fits in (5-bit unsigned, 3-bit unsigned) | |
| 1483 // we save it as one byte, otherwise we write a 0xFF escape character and use regular compression. 0x0 is used | |
| 1484 // as end-of-stream terminator. | |
| 1485 | |
| 1486 void CompressedLineNumberWriteStream::write_pair_regular(int bci_delta, int line_delta) { | |
| 1487 // bci and line number does not compress into single byte. | |
| 1488 // Write out escape character and use regular compression for bci and line number. | |
| 1489 write_byte((jubyte)0xFF); | |
| 1490 write_signed_int(bci_delta); | |
| 1491 write_signed_int(line_delta); | |
| 1492 } | |
| 1493 | |
|
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1494 // See comment in method.hpp which explains why this exists. |
|
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1495 #if defined(_M_AMD64) && _MSC_VER >= 1400 |
| 0 | 1496 #pragma optimize("", off) |
| 1497 void CompressedLineNumberWriteStream::write_pair(int bci, int line) { | |
| 1498 write_pair_inline(bci, line); | |
| 1499 } | |
| 1500 #pragma optimize("", on) | |
| 1501 #endif | |
| 1502 | |
| 1503 CompressedLineNumberReadStream::CompressedLineNumberReadStream(u_char* buffer) : CompressedReadStream(buffer) { | |
| 1504 _bci = 0; | |
| 1505 _line = 0; | |
| 1506 }; | |
| 1507 | |
| 1508 | |
| 1509 bool CompressedLineNumberReadStream::read_pair() { | |
| 1510 jubyte next = read_byte(); | |
| 1511 // Check for terminator | |
| 1512 if (next == 0) return false; | |
| 1513 if (next == 0xFF) { | |
| 1514 // Escape character, regular compression used | |
| 1515 _bci += read_signed_int(); | |
| 1516 _line += read_signed_int(); | |
| 1517 } else { | |
| 1518 // Single byte compression used | |
| 1519 _bci += next >> 3; | |
| 1520 _line += next & 0x7; | |
| 1521 } | |
| 1522 return true; | |
| 1523 } | |
| 1524 | |
| 1525 | |
|
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1526 Bytecodes::Code Method::orig_bytecode_at(int bci) const { |
|
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1527 BreakpointInfo* bp = method_holder()->breakpoints(); |
| 0 | 1528 for (; bp != NULL; bp = bp->next()) { |
| 1529 if (bp->match(this, bci)) { | |
| 1530 return bp->orig_bytecode(); | |
| 1531 } | |
| 1532 } | |
|
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1533 { |
|
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1534 ResourceMark rm; |
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1535 fatal(err_msg("no original bytecode found in %s at bci %d", name_and_sig_as_C_string(), bci)); |
|
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1536 } |
| 0 | 1537 return Bytecodes::_shouldnotreachhere; |
| 1538 } | |
| 1539 | |
|
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1540 void Method::set_orig_bytecode_at(int bci, Bytecodes::Code code) { |
| 0 | 1541 assert(code != Bytecodes::_breakpoint, "cannot patch breakpoints this way"); |
|
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1542 BreakpointInfo* bp = method_holder()->breakpoints(); |
| 0 | 1543 for (; bp != NULL; bp = bp->next()) { |
| 1544 if (bp->match(this, bci)) { | |
| 1545 bp->set_orig_bytecode(code); | |
| 1546 // and continue, in case there is more than one | |
| 1547 } | |
| 1548 } | |
| 1549 } | |
| 1550 | |
|
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1551 void Method::set_breakpoint(int bci) { |
|
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1552 InstanceKlass* ik = method_holder(); |
| 0 | 1553 BreakpointInfo *bp = new BreakpointInfo(this, bci); |
| 1554 bp->set_next(ik->breakpoints()); | |
| 1555 ik->set_breakpoints(bp); | |
| 1556 // do this last: | |
| 1557 bp->set(this); | |
| 1558 } | |
| 1559 | |
|
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1560 static void clear_matches(Method* m, int bci) { |
|
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1561 InstanceKlass* ik = m->method_holder(); |
| 0 | 1562 BreakpointInfo* prev_bp = NULL; |
| 1563 BreakpointInfo* next_bp; | |
| 1564 for (BreakpointInfo* bp = ik->breakpoints(); bp != NULL; bp = next_bp) { | |
| 1565 next_bp = bp->next(); | |
| 1566 // bci value of -1 is used to delete all breakpoints in method m (ex: clear_all_breakpoint). | |
| 1567 if (bci >= 0 ? bp->match(m, bci) : bp->match(m)) { | |
| 1568 // do this first: | |
| 1569 bp->clear(m); | |
| 1570 // unhook it | |
| 1571 if (prev_bp != NULL) | |
| 1572 prev_bp->set_next(next_bp); | |
| 1573 else | |
| 1574 ik->set_breakpoints(next_bp); | |
| 1575 delete bp; | |
| 1576 // When class is redefined JVMTI sets breakpoint in all versions of EMCP methods | |
| 1577 // at same location. So we have multiple matching (method_index and bci) | |
| 1578 // BreakpointInfo nodes in BreakpointInfo list. We should just delete one | |
| 1579 // breakpoint for clear_breakpoint request and keep all other method versions | |
| 1580 // BreakpointInfo for future clear_breakpoint request. | |
| 1581 // bcivalue of -1 is used to clear all breakpoints (see clear_all_breakpoints) | |
| 1582 // which is being called when class is unloaded. We delete all the Breakpoint | |
| 1583 // information for all versions of method. We may not correctly restore the original | |
| 1584 // bytecode in all method versions, but that is ok. Because the class is being unloaded | |
| 1585 // so these methods won't be used anymore. | |
| 1586 if (bci >= 0) { | |
| 1587 break; | |
| 1588 } | |
| 1589 } else { | |
| 1590 // This one is a keeper. | |
| 1591 prev_bp = bp; | |
| 1592 } | |
| 1593 } | |
| 1594 } | |
| 1595 | |
|
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1596 void Method::clear_breakpoint(int bci) { |
| 0 | 1597 assert(bci >= 0, ""); |
| 1598 clear_matches(this, bci); | |
| 1599 } | |
| 1600 | |
|
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1601 void Method::clear_all_breakpoints() { |
| 0 | 1602 clear_matches(this, -1); |
| 1603 } | |
| 1604 | |
| 1605 | |
|
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1606 int Method::invocation_count() { |
|
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1607 MethodCounters *mcs = method_counters(); |
| 1783 | 1608 if (TieredCompilation) { |
|
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1609 MethodData* const mdo = method_data(); |
|
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1610 if (((mcs != NULL) ? mcs->invocation_counter()->carry() : false) || |
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1611 ((mdo != NULL) ? mdo->invocation_counter()->carry() : false)) { |
| 1783 | 1612 return InvocationCounter::count_limit; |
| 1613 } else { | |
|
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1614 return ((mcs != NULL) ? mcs->invocation_counter()->count() : 0) + |
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1615 ((mdo != NULL) ? mdo->invocation_counter()->count() : 0); |
| 1783 | 1616 } |
| 1617 } else { | |
|
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1618 return (mcs == NULL) ? 0 : mcs->invocation_counter()->count(); |
| 1783 | 1619 } |
| 1620 } | |
| 1621 | |
|
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1622 int Method::backedge_count() { |
|
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1623 MethodCounters *mcs = method_counters(); |
| 1783 | 1624 if (TieredCompilation) { |
|
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1625 MethodData* const mdo = method_data(); |
|
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1626 if (((mcs != NULL) ? mcs->backedge_counter()->carry() : false) || |
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1627 ((mdo != NULL) ? mdo->backedge_counter()->carry() : false)) { |
| 1783 | 1628 return InvocationCounter::count_limit; |
| 1629 } else { | |
|
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1630 return ((mcs != NULL) ? mcs->backedge_counter()->count() : 0) + |
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1631 ((mdo != NULL) ? mdo->backedge_counter()->count() : 0); |
| 1783 | 1632 } |
| 1633 } else { | |
|
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1634 return (mcs == NULL) ? 0 : mcs->backedge_counter()->count(); |
| 1783 | 1635 } |
| 1636 } | |
| 1637 | |
|
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1638 int Method::highest_comp_level() const { |
|
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1639 const MethodCounters* mcs = method_counters(); |
|
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1640 if (mcs != NULL) { |
|
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1641 return mcs->highest_comp_level(); |
| 1783 | 1642 } else { |
| 1643 return CompLevel_none; | |
| 1644 } | |
| 1645 } | |
| 1646 | |
|
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1647 int Method::highest_osr_comp_level() const { |
|
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1648 const MethodCounters* mcs = method_counters(); |
|
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1649 if (mcs != NULL) { |
|
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1650 return mcs->highest_osr_comp_level(); |
| 1783 | 1651 } else { |
| 1652 return CompLevel_none; | |
| 1653 } | |
| 1654 } | |
| 1655 | |
|
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1656 void Method::set_highest_comp_level(int level) { |
|
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1657 MethodCounters* mcs = method_counters(); |
|
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1658 if (mcs != NULL) { |
|
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1659 mcs->set_highest_comp_level(level); |
| 1783 | 1660 } |
| 1661 } | |
| 1662 | |
|
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1663 void Method::set_highest_osr_comp_level(int level) { |
|
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1664 MethodCounters* mcs = method_counters(); |
|
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1665 if (mcs != NULL) { |
|
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1666 mcs->set_highest_osr_comp_level(level); |
| 1783 | 1667 } |
| 1668 } | |
| 1669 | |
|
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1670 BreakpointInfo::BreakpointInfo(Method* m, int bci) { |
| 0 | 1671 _bci = bci; |
| 1672 _name_index = m->name_index(); | |
| 1673 _signature_index = m->signature_index(); | |
| 1674 _orig_bytecode = (Bytecodes::Code) *m->bcp_from(_bci); | |
| 1675 if (_orig_bytecode == Bytecodes::_breakpoint) | |
| 1676 _orig_bytecode = m->orig_bytecode_at(_bci); | |
| 1677 _next = NULL; | |
| 1678 } | |
| 1679 | |
|
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1680 void BreakpointInfo::set(Method* method) { |
| 0 | 1681 #ifdef ASSERT |
| 1682 { | |
| 1683 Bytecodes::Code code = (Bytecodes::Code) *method->bcp_from(_bci); | |
| 1684 if (code == Bytecodes::_breakpoint) | |
| 1685 code = method->orig_bytecode_at(_bci); | |
| 1686 assert(orig_bytecode() == code, "original bytecode must be the same"); | |
| 1687 } | |
| 1688 #endif | |
|
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1689 Thread *thread = Thread::current(); |
| 0 | 1690 *method->bcp_from(_bci) = Bytecodes::_breakpoint; |
|
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1691 method->incr_number_of_breakpoints(thread); |
| 0 | 1692 SystemDictionary::notice_modification(); |
| 1693 { | |
| 1694 // Deoptimize all dependents on this method | |
| 1695 HandleMark hm(thread); | |
| 1696 methodHandle mh(thread, method); | |
| 1697 Universe::flush_dependents_on_method(mh); | |
| 1698 } | |
| 1699 } | |
| 1700 | |
|
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1701 void BreakpointInfo::clear(Method* method) { |
| 0 | 1702 *method->bcp_from(_bci) = orig_bytecode(); |
| 1703 assert(method->number_of_breakpoints() > 0, "must not go negative"); | |
|
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1704 method->decr_number_of_breakpoints(Thread::current()); |
| 0 | 1705 } |
|
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1706 |
|
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1707 // jmethodID handling |
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1708 |
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1709 // This is a block allocating object, sort of like JNIHandleBlock, only a |
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1710 // lot simpler. There aren't many of these, they aren't long, they are rarely |
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1711 // deleted and so we can do some suboptimal things. |
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1712 // It's allocated on the CHeap because once we allocate a jmethodID, we can |
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1713 // never get rid of it. |
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1714 // It would be nice to be able to parameterize the number of methods for |
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1715 // the null_class_loader but then we'd have to turn this and ClassLoaderData |
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1716 // into templates. |
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1717 |
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1718 // I feel like this brain dead class should exist somewhere in the STL |
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1719 |
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1720 class JNIMethodBlock : public CHeapObj<mtClass> { |
|
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1721 enum { number_of_methods = 8 }; |
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1722 |
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1723 Method* _methods[number_of_methods]; |
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1724 int _top; |
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1725 JNIMethodBlock* _next; |
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1726 public: |
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1727 static Method* const _free_method; |
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1728 |
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1729 JNIMethodBlock() : _next(NULL), _top(0) { |
|
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1730 for (int i = 0; i< number_of_methods; i++) _methods[i] = _free_method; |
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1731 } |
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1732 |
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1733 Method** add_method(Method* m) { |
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1734 if (_top < number_of_methods) { |
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1735 // top points to the next free entry. |
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1736 int i = _top; |
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1737 _methods[i] = m; |
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1738 _top++; |
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1739 return &_methods[i]; |
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1740 } else if (_top == number_of_methods) { |
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1741 // if the next free entry ran off the block see if there's a free entry |
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1742 for (int i = 0; i< number_of_methods; i++) { |
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1743 if (_methods[i] == _free_method) { |
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1744 _methods[i] = m; |
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1745 return &_methods[i]; |
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1746 } |
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1747 } |
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1748 // Only check each block once for frees. They're very unlikely. |
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1749 // Increment top past the end of the block. |
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1750 _top++; |
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1751 } |
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1752 // need to allocate a next block. |
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1753 if (_next == NULL) { |
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1754 _next = new JNIMethodBlock(); |
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1755 } |
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1756 return _next->add_method(m); |
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1757 } |
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1758 |
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1759 bool contains(Method** m) { |
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1760 for (JNIMethodBlock* b = this; b != NULL; b = b->_next) { |
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1761 for (int i = 0; i< number_of_methods; i++) { |
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1762 if (&(b->_methods[i]) == m) { |
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1763 return true; |
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1764 } |
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1765 } |
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1766 } |
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1767 return false; // not found |
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1768 } |
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1769 |
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1770 // Doesn't really destroy it, just marks it as free so it can be reused. |
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1771 void destroy_method(Method** m) { |
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1772 #ifdef ASSERT |
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1773 assert(contains(m), "should be a methodID"); |
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1774 #endif // ASSERT |
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1775 *m = _free_method; |
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1776 } |
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1777 |
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1778 // During class unloading the methods are cleared, which is different |
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1779 // than freed. |
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1780 void clear_all_methods() { |
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1781 for (JNIMethodBlock* b = this; b != NULL; b = b->_next) { |
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1782 for (int i = 0; i< number_of_methods; i++) { |
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1783 _methods[i] = NULL; |
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1784 } |
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1785 } |
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1786 } |
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1787 #ifndef PRODUCT |
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1788 int count_methods() { |
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1789 // count all allocated methods |
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1790 int count = 0; |
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1791 for (JNIMethodBlock* b = this; b != NULL; b = b->_next) { |
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1792 for (int i = 0; i< number_of_methods; i++) { |
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1793 if (_methods[i] != _free_method) count++; |
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1794 } |
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1795 } |
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1796 return count; |
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1797 } |
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1798 #endif // PRODUCT |
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1799 }; |
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1800 |
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1801 // Something that can't be mistaken for an address or a markOop |
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1802 Method* const JNIMethodBlock::_free_method = (Method*)55; |
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1803 |
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1804 // Add a method id to the jmethod_ids |
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1805 jmethodID Method::make_jmethod_id(ClassLoaderData* loader_data, Method* m) { |
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1806 ClassLoaderData* cld = loader_data; |
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1807 |
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1808 if (!SafepointSynchronize::is_at_safepoint()) { |
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1809 // Have to add jmethod_ids() to class loader data thread-safely. |
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1810 // Also have to add the method to the list safely, which the cld lock |
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1811 // protects as well. |
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1812 MutexLockerEx ml(cld->metaspace_lock(), Mutex::_no_safepoint_check_flag); |
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1813 if (cld->jmethod_ids() == NULL) { |
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1814 cld->set_jmethod_ids(new JNIMethodBlock()); |
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1815 } |
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1816 // jmethodID is a pointer to Method* |
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1817 return (jmethodID)cld->jmethod_ids()->add_method(m); |
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1818 } else { |
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1819 // At safepoint, we are single threaded and can set this. |
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1820 if (cld->jmethod_ids() == NULL) { |
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1821 cld->set_jmethod_ids(new JNIMethodBlock()); |
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1822 } |
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1823 // jmethodID is a pointer to Method* |
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1824 return (jmethodID)cld->jmethod_ids()->add_method(m); |
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1825 } |
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1826 } |
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1827 |
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1828 // Mark a jmethodID as free. This is called when there is a data race in |
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1829 // InstanceKlass while creating the jmethodID cache. |
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1830 void Method::destroy_jmethod_id(ClassLoaderData* loader_data, jmethodID m) { |
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1831 ClassLoaderData* cld = loader_data; |
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1832 Method** ptr = (Method**)m; |
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1833 assert(cld->jmethod_ids() != NULL, "should have method handles"); |
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1834 cld->jmethod_ids()->destroy_method(ptr); |
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1835 } |
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1836 |
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1837 void Method::change_method_associated_with_jmethod_id(jmethodID jmid, Method* new_method) { |
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1838 // Can't assert the method_holder is the same because the new method has the |
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1839 // scratch method holder. |
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1840 assert(resolve_jmethod_id(jmid)->method_holder()->class_loader() |
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1841 == new_method->method_holder()->class_loader(), |
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1842 "changing to a different class loader"); |
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1843 // Just change the method in place, jmethodID pointer doesn't change. |
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1844 *((Method**)jmid) = new_method; |
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1845 } |
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1846 |
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1847 bool Method::is_method_id(jmethodID mid) { |
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1848 Method* m = resolve_jmethod_id(mid); |
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1849 assert(m != NULL, "should be called with non-null method"); |
|
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1850 InstanceKlass* ik = m->method_holder(); |
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1851 ClassLoaderData* cld = ik->class_loader_data(); |
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1852 if (cld->jmethod_ids() == NULL) return false; |
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1853 return (cld->jmethod_ids()->contains((Method**)mid)); |
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1854 } |
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1855 |
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1856 Method* Method::checked_resolve_jmethod_id(jmethodID mid) { |
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1857 if (mid == NULL) return NULL; |
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1858 Method* o = resolve_jmethod_id(mid); |
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1859 if (o == NULL || o == JNIMethodBlock::_free_method || !((Metadata*)o)->is_method()) { |
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1860 return NULL; |
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1861 } |
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1862 return o; |
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1863 }; |
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1864 |
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1865 void Method::set_on_stack(const bool value) { |
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1866 // Set both the method itself and its constant pool. The constant pool |
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1867 // on stack means some method referring to it is also on the stack. |
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1868 _access_flags.set_on_stack(value); |
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1869 constants()->set_on_stack(value); |
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1870 if (value) MetadataOnStackMark::record(this); |
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1871 } |
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1872 |
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1873 // Called when the class loader is unloaded to make all methods weak. |
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1874 void Method::clear_jmethod_ids(ClassLoaderData* loader_data) { |
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1875 loader_data->jmethod_ids()->clear_all_methods(); |
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1876 } |
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1877 |
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1878 bool Method::has_method_vptr(const void* ptr) { |
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1879 Method m; |
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1880 // This assumes that the vtbl pointer is the first word of a C++ object. |
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1881 // This assumption is also in universe.cpp patch_klass_vtble |
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1882 void* vtbl2 = dereference_vptr((const void*)&m); |
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1883 void* this_vtbl = dereference_vptr(ptr); |
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1884 return vtbl2 == this_vtbl; |
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1885 } |
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1886 |
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1887 // Check that this pointer is valid by checking that the vtbl pointer matches |
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1888 bool Method::is_valid_method() const { |
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1889 if (this == NULL) { |
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1890 return false; |
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1891 } else if (!is_metaspace_object()) { |
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1892 return false; |
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1893 } else { |
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1894 return has_method_vptr((const void*)this); |
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1895 } |
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1896 } |
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1897 |
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1898 #ifndef PRODUCT |
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1899 void Method::print_jmethod_ids(ClassLoaderData* loader_data, outputStream* out) { |
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1900 out->print_cr("jni_method_id count = %d", loader_data->jmethod_ids()->count_methods()); |
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1901 } |
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1902 #endif // PRODUCT |
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1903 |
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1904 |
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1905 // Printing |
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1906 |
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1907 #ifndef PRODUCT |
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1908 |
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1909 void Method::print_on(outputStream* st) const { |
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1910 ResourceMark rm; |
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1911 assert(is_method(), "must be method"); |
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1912 st->print_cr("%s", internal_name()); |
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1913 // get the effect of PrintOopAddress, always, for methods: |
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1914 st->print_cr(" - this oop: "INTPTR_FORMAT, (intptr_t)this); |
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1915 st->print (" - method holder: "); method_holder()->print_value_on(st); st->cr(); |
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1916 st->print (" - constants: "INTPTR_FORMAT" ", (address)constants()); |
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1917 constants()->print_value_on(st); st->cr(); |
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1918 st->print (" - access: 0x%x ", access_flags().as_int()); access_flags().print_on(st); st->cr(); |
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1919 st->print (" - name: "); name()->print_value_on(st); st->cr(); |
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1920 st->print (" - signature: "); signature()->print_value_on(st); st->cr(); |
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1921 st->print_cr(" - max stack: %d", max_stack()); |
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1922 st->print_cr(" - max locals: %d", max_locals()); |
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1923 st->print_cr(" - size of params: %d", size_of_parameters()); |
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1924 st->print_cr(" - method size: %d", method_size()); |
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1925 if (intrinsic_id() != vmIntrinsics::_none) |
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1926 st->print_cr(" - intrinsic id: %d %s", intrinsic_id(), vmIntrinsics::name_at(intrinsic_id())); |
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1927 if (highest_comp_level() != CompLevel_none) |
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1928 st->print_cr(" - highest level: %d", highest_comp_level()); |
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1929 st->print_cr(" - vtable index: %d", _vtable_index); |
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1930 st->print_cr(" - i2i entry: " INTPTR_FORMAT, interpreter_entry()); |
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1931 st->print( " - adapters: "); |
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1932 AdapterHandlerEntry* a = ((Method*)this)->adapter(); |
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1933 if (a == NULL) |
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1934 st->print_cr(INTPTR_FORMAT, a); |
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1935 else |
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1936 a->print_adapter_on(st); |
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1937 st->print_cr(" - compiled entry " INTPTR_FORMAT, from_compiled_entry()); |
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1938 st->print_cr(" - code size: %d", code_size()); |
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1939 if (code_size() != 0) { |
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1940 st->print_cr(" - code start: " INTPTR_FORMAT, code_base()); |
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1941 st->print_cr(" - code end (excl): " INTPTR_FORMAT, code_base() + code_size()); |
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1942 } |
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1943 if (method_data() != NULL) { |
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1944 st->print_cr(" - method data: " INTPTR_FORMAT, (address)method_data()); |
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1945 } |
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1946 st->print_cr(" - checked ex length: %d", checked_exceptions_length()); |
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1947 if (checked_exceptions_length() > 0) { |
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1948 CheckedExceptionElement* table = checked_exceptions_start(); |
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1949 st->print_cr(" - checked ex start: " INTPTR_FORMAT, table); |
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1950 if (Verbose) { |
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1951 for (int i = 0; i < checked_exceptions_length(); i++) { |
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1952 st->print_cr(" - throws %s", constants()->printable_name_at(table[i].class_cp_index)); |
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1953 } |
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1954 } |
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1955 } |
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1956 if (has_linenumber_table()) { |
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1957 u_char* table = compressed_linenumber_table(); |
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1958 st->print_cr(" - linenumber start: " INTPTR_FORMAT, table); |
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1959 if (Verbose) { |
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1960 CompressedLineNumberReadStream stream(table); |
|
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1961 while (stream.read_pair()) { |
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1962 st->print_cr(" - line %d: %d", stream.line(), stream.bci()); |
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1963 } |
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1964 } |
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1965 } |
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1966 st->print_cr(" - localvar length: %d", localvariable_table_length()); |
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1967 if (localvariable_table_length() > 0) { |
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1968 LocalVariableTableElement* table = localvariable_table_start(); |
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1969 st->print_cr(" - localvar start: " INTPTR_FORMAT, table); |
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1970 if (Verbose) { |
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1971 for (int i = 0; i < localvariable_table_length(); i++) { |
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1972 int bci = table[i].start_bci; |
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1973 int len = table[i].length; |
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1974 const char* name = constants()->printable_name_at(table[i].name_cp_index); |
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1975 const char* desc = constants()->printable_name_at(table[i].descriptor_cp_index); |
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1976 int slot = table[i].slot; |
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1977 st->print_cr(" - %s %s bci=%d len=%d slot=%d", desc, name, bci, len, slot); |
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1978 } |
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1979 } |
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1980 } |
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1981 if (code() != NULL) { |
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1982 st->print (" - compiled code: "); |
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1983 code()->print_value_on(st); |
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1984 } |
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1985 if (is_native()) { |
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1986 st->print_cr(" - native function: " INTPTR_FORMAT, native_function()); |
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1987 st->print_cr(" - signature handler: " INTPTR_FORMAT, signature_handler()); |
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1988 } |
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1989 } |
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1990 |
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1991 #endif //PRODUCT |
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1992 |
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1993 void Method::print_value_on(outputStream* st) const { |
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1994 assert(is_method(), "must be method"); |
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1995 st->print("%s", internal_name()); |
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1996 print_address_on(st); |
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1997 st->print(" "); |
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1998 name()->print_value_on(st); |
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1999 st->print(" "); |
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2000 signature()->print_value_on(st); |
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2001 st->print(" in "); |
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2002 method_holder()->print_value_on(st); |
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2003 if (WizardMode) st->print("#%d", _vtable_index); |
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2004 if (WizardMode) st->print("[%d,%d]", size_of_parameters(), max_locals()); |
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2005 if (WizardMode && code() != NULL) st->print(" ((nmethod*)%p)", code()); |
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2006 } |
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2007 |
| 7956 | 2008 #if INCLUDE_SERVICES |
| 2009 // Size Statistics | |
| 2010 void Method::collect_statistics(KlassSizeStats *sz) const { | |
| 2011 int mysize = sz->count(this); | |
| 2012 sz->_method_bytes += mysize; | |
| 2013 sz->_method_all_bytes += mysize; | |
| 2014 sz->_rw_bytes += mysize; | |
| 2015 | |
| 2016 if (constMethod()) { | |
| 2017 constMethod()->collect_statistics(sz); | |
| 2018 } | |
| 2019 if (method_data()) { | |
| 2020 method_data()->collect_statistics(sz); | |
| 2021 } | |
| 2022 } | |
| 2023 #endif // INCLUDE_SERVICES | |
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2024 |
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2025 // Verification |
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2026 |
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2027 void Method::verify_on(outputStream* st) { |
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2028 guarantee(is_method(), "object must be method"); |
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2029 guarantee(constants()->is_constantPool(), "should be constant pool"); |
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2030 guarantee(constMethod()->is_constMethod(), "should be ConstMethod*"); |
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2031 MethodData* md = method_data(); |
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2032 guarantee(md == NULL || |
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2033 md->is_methodData(), "should be method data"); |
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2034 } |