Mercurial > hg > truffle
annotate src/share/vm/oops/method.cpp @ 8025:461a3adac4d1
Merge
| author | sspitsyn |
|---|---|
| date | Fri, 08 Feb 2013 09:14:06 -0800 |
| parents | d05ff4bf41b3 8d9fc28831cc |
| children | 927a311d00f9 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
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26 #include "classfile/metadataOnStackMark.hpp" |
| 1972 | 27 #include "classfile/systemDictionary.hpp" |
| 28 #include "code/debugInfoRec.hpp" | |
| 29 #include "gc_interface/collectedHeap.inline.hpp" | |
| 30 #include "interpreter/bytecodeStream.hpp" | |
| 31 #include "interpreter/bytecodeTracer.hpp" | |
| 32 #include "interpreter/bytecodes.hpp" | |
| 33 #include "interpreter/interpreter.hpp" | |
| 34 #include "interpreter/oopMapCache.hpp" | |
| 35 #include "memory/gcLocker.hpp" | |
| 36 #include "memory/generation.hpp" | |
| 7956 | 37 #include "memory/heapInspection.hpp" |
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38 #include "memory/metadataFactory.hpp" |
| 1972 | 39 #include "memory/oopFactory.hpp" |
| 6934 | 40 #include "oops/constMethod.hpp" |
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41 #include "oops/methodData.hpp" |
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42 #include "oops/method.hpp" |
| 1972 | 43 #include "oops/oop.inline.hpp" |
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44 #include "oops/symbol.hpp" |
| 1972 | 45 #include "prims/jvmtiExport.hpp" |
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46 #include "prims/methodHandles.hpp" |
| 1972 | 47 #include "prims/nativeLookup.hpp" |
| 48 #include "runtime/arguments.hpp" | |
| 49 #include "runtime/compilationPolicy.hpp" | |
| 50 #include "runtime/frame.inline.hpp" | |
| 51 #include "runtime/handles.inline.hpp" | |
| 52 #include "runtime/relocator.hpp" | |
| 53 #include "runtime/sharedRuntime.hpp" | |
| 54 #include "runtime/signature.hpp" | |
| 3779 | 55 #include "utilities/quickSort.hpp" |
| 1972 | 56 #include "utilities/xmlstream.hpp" |
| 0 | 57 |
| 58 | |
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59 // Implementation of Method |
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60 |
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61 Method* Method::allocate(ClassLoaderData* loader_data, |
| 6934 | 62 int byte_code_size, |
| 63 AccessFlags access_flags, | |
| 64 int compressed_line_number_size, | |
| 65 int localvariable_table_length, | |
| 66 int exception_table_length, | |
| 67 int checked_exceptions_length, | |
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68 int method_parameters_length, |
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69 u2 generic_signature_index, |
| 6934 | 70 ConstMethod::MethodType method_type, |
| 71 TRAPS) { | |
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72 assert(!access_flags.is_native() || byte_code_size == 0, |
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73 "native methods should not contain byte codes"); |
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74 ConstMethod* cm = ConstMethod::allocate(loader_data, |
| 6934 | 75 byte_code_size, |
| 76 compressed_line_number_size, | |
| 77 localvariable_table_length, | |
| 78 exception_table_length, | |
| 79 checked_exceptions_length, | |
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80 method_parameters_length, |
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81 generic_signature_index, |
| 6934 | 82 method_type, |
| 83 CHECK_NULL); | |
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84 |
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85 int size = Method::size(access_flags.is_native()); |
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86 |
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87 return new (loader_data, size, false, THREAD) Method(cm, access_flags, size); |
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88 } |
| 0 | 89 |
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90 Method::Method(ConstMethod* xconst, |
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91 AccessFlags access_flags, int size) { |
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92 No_Safepoint_Verifier no_safepoint; |
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93 set_constMethod(xconst); |
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94 set_access_flags(access_flags); |
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95 set_method_size(size); |
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96 set_name_index(0); |
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97 set_signature_index(0); |
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98 #ifdef CC_INTERP |
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99 set_result_index(T_VOID); |
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100 #endif |
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101 set_constants(NULL); |
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102 set_max_stack(0); |
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103 set_max_locals(0); |
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104 set_intrinsic_id(vmIntrinsics::_none); |
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105 set_jfr_towrite(false); |
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106 set_method_data(NULL); |
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107 set_interpreter_throwout_count(0); |
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108 set_vtable_index(Method::garbage_vtable_index); |
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109 |
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110 // Fix and bury in Method* |
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111 set_interpreter_entry(NULL); // sets i2i entry and from_int |
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112 set_adapter_entry(NULL); |
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113 clear_code(); // from_c/from_i get set to c2i/i2i |
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114 |
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115 if (access_flags.is_native()) { |
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116 clear_native_function(); |
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117 set_signature_handler(NULL); |
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118 } |
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119 |
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120 NOT_PRODUCT(set_compiled_invocation_count(0);) |
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121 set_interpreter_invocation_count(0); |
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122 invocation_counter()->init(); |
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123 backedge_counter()->init(); |
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124 clear_number_of_breakpoints(); |
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125 |
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126 #ifdef TIERED |
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127 set_rate(0); |
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128 set_prev_event_count(0); |
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129 set_prev_time(0); |
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130 #endif |
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131 } |
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132 |
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133 // Release Method*. The nmethod will be gone when we get here because |
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134 // we've walked the code cache. |
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135 void Method::deallocate_contents(ClassLoaderData* loader_data) { |
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136 MetadataFactory::free_metadata(loader_data, constMethod()); |
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137 set_constMethod(NULL); |
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138 MetadataFactory::free_metadata(loader_data, method_data()); |
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139 set_method_data(NULL); |
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140 // The nmethod will be gone when we get here. |
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141 if (code() != NULL) _code = NULL; |
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142 } |
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143 |
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144 address Method::get_i2c_entry() { |
| 0 | 145 assert(_adapter != NULL, "must have"); |
| 146 return _adapter->get_i2c_entry(); | |
| 147 } | |
| 148 | |
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149 address Method::get_c2i_entry() { |
| 0 | 150 assert(_adapter != NULL, "must have"); |
| 151 return _adapter->get_c2i_entry(); | |
| 152 } | |
| 153 | |
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154 address Method::get_c2i_unverified_entry() { |
| 0 | 155 assert(_adapter != NULL, "must have"); |
| 156 return _adapter->get_c2i_unverified_entry(); | |
| 157 } | |
| 158 | |
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159 char* Method::name_and_sig_as_C_string() const { |
| 6983 | 160 return name_and_sig_as_C_string(constants()->pool_holder(), name(), signature()); |
| 0 | 161 } |
| 162 | |
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163 char* Method::name_and_sig_as_C_string(char* buf, int size) const { |
| 6983 | 164 return name_and_sig_as_C_string(constants()->pool_holder(), name(), signature(), buf, size); |
| 0 | 165 } |
| 166 | |
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167 char* Method::name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature) { |
| 0 | 168 const char* klass_name = klass->external_name(); |
| 169 int klass_name_len = (int)strlen(klass_name); | |
| 170 int method_name_len = method_name->utf8_length(); | |
| 171 int len = klass_name_len + 1 + method_name_len + signature->utf8_length(); | |
| 172 char* dest = NEW_RESOURCE_ARRAY(char, len + 1); | |
| 173 strcpy(dest, klass_name); | |
| 174 dest[klass_name_len] = '.'; | |
| 175 strcpy(&dest[klass_name_len + 1], method_name->as_C_string()); | |
| 176 strcpy(&dest[klass_name_len + 1 + method_name_len], signature->as_C_string()); | |
| 177 dest[len] = 0; | |
| 178 return dest; | |
| 179 } | |
| 180 | |
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181 char* Method::name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size) { |
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182 Symbol* klass_name = klass->name(); |
| 0 | 183 klass_name->as_klass_external_name(buf, size); |
| 184 int len = (int)strlen(buf); | |
| 185 | |
| 186 if (len < size - 1) { | |
| 187 buf[len++] = '.'; | |
| 188 | |
| 189 method_name->as_C_string(&(buf[len]), size - len); | |
| 190 len = (int)strlen(buf); | |
| 191 | |
| 192 signature->as_C_string(&(buf[len]), size - len); | |
| 193 } | |
| 194 | |
| 195 return buf; | |
| 196 } | |
| 197 | |
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198 int Method::fast_exception_handler_bci_for(methodHandle mh, KlassHandle ex_klass, int throw_bci, TRAPS) { |
| 0 | 199 // exception table holds quadruple entries of the form (beg_bci, end_bci, handler_bci, klass_index) |
| 200 // access exception table | |
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201 ExceptionTable table(mh()); |
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202 int length = table.length(); |
| 0 | 203 // iterate through all entries sequentially |
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204 constantPoolHandle pool(THREAD, mh->constants()); |
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205 for (int i = 0; i < length; i ++) { |
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206 //reacquire the table in case a GC happened |
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207 ExceptionTable table(mh()); |
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208 int beg_bci = table.start_pc(i); |
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209 int end_bci = table.end_pc(i); |
| 0 | 210 assert(beg_bci <= end_bci, "inconsistent exception table"); |
| 211 if (beg_bci <= throw_bci && throw_bci < end_bci) { | |
| 212 // exception handler bci range covers throw_bci => investigate further | |
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213 int handler_bci = table.handler_pc(i); |
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214 int klass_index = table.catch_type_index(i); |
| 0 | 215 if (klass_index == 0) { |
| 216 return handler_bci; | |
| 217 } else if (ex_klass.is_null()) { | |
| 218 return handler_bci; | |
| 219 } else { | |
| 220 // we know the exception class => get the constraint class | |
| 221 // this may require loading of the constraint class; if verification | |
| 222 // fails or some other exception occurs, return handler_bci | |
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223 Klass* k = pool->klass_at(klass_index, CHECK_(handler_bci)); |
| 0 | 224 KlassHandle klass = KlassHandle(THREAD, k); |
| 225 assert(klass.not_null(), "klass not loaded"); | |
| 226 if (ex_klass->is_subtype_of(klass())) { | |
| 227 return handler_bci; | |
| 228 } | |
| 229 } | |
| 230 } | |
| 231 } | |
| 232 | |
| 233 return -1; | |
| 234 } | |
| 235 | |
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236 void Method::mask_for(int bci, InterpreterOopMap* mask) { |
| 0 | 237 |
| 238 Thread* myThread = Thread::current(); | |
| 239 methodHandle h_this(myThread, this); | |
| 240 #ifdef ASSERT | |
| 241 bool has_capability = myThread->is_VM_thread() || | |
| 242 myThread->is_ConcurrentGC_thread() || | |
| 243 myThread->is_GC_task_thread(); | |
| 244 | |
| 245 if (!has_capability) { | |
| 246 if (!VerifyStack && !VerifyLastFrame) { | |
| 247 // verify stack calls this outside VM thread | |
| 248 warning("oopmap should only be accessed by the " | |
| 249 "VM, GC task or CMS threads (or during debugging)"); | |
| 250 InterpreterOopMap local_mask; | |
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251 method_holder()->mask_for(h_this, bci, &local_mask); |
| 0 | 252 local_mask.print(); |
| 253 } | |
| 254 } | |
| 255 #endif | |
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256 method_holder()->mask_for(h_this, bci, mask); |
| 0 | 257 return; |
| 258 } | |
| 259 | |
| 260 | |
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261 int Method::bci_from(address bcp) const { |
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262 #ifdef ASSERT |
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263 { ResourceMark rm; |
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264 assert(is_native() && bcp == code_base() || contains(bcp) || is_error_reported(), |
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265 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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266 } |
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267 #endif |
| 0 | 268 return bcp - code_base(); |
| 269 } | |
| 270 | |
| 271 | |
| 272 // Return (int)bcx if it appears to be a valid BCI. | |
| 273 // Return bci_from((address)bcx) if it appears to be a valid BCP. | |
| 274 // Return -1 otherwise. | |
| 275 // Used by profiling code, when invalid data is a possibility. | |
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276 // The caller is responsible for validating the Method* itself. |
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277 int Method::validate_bci_from_bcx(intptr_t bcx) const { |
| 0 | 278 // keep bci as -1 if not a valid bci |
| 279 int bci = -1; | |
| 280 if (bcx == 0 || (address)bcx == code_base()) { | |
| 281 // code_size() may return 0 and we allow 0 here | |
| 282 // the method may be native | |
| 283 bci = 0; | |
| 284 } else if (frame::is_bci(bcx)) { | |
| 285 if (bcx < code_size()) { | |
| 286 bci = (int)bcx; | |
| 287 } | |
| 288 } else if (contains((address)bcx)) { | |
| 289 bci = (address)bcx - code_base(); | |
| 290 } | |
| 291 // Assert that if we have dodged any asserts, bci is negative. | |
| 292 assert(bci == -1 || bci == bci_from(bcp_from(bci)), "sane bci if >=0"); | |
| 293 return bci; | |
| 294 } | |
| 295 | |
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296 address Method::bcp_from(int bci) const { |
| 0 | 297 assert((is_native() && bci == 0) || (!is_native() && 0 <= bci && bci < code_size()), "illegal bci"); |
| 298 address bcp = code_base() + bci; | |
| 299 assert(is_native() && bcp == code_base() || contains(bcp), "bcp doesn't belong to this method"); | |
| 300 return bcp; | |
| 301 } | |
| 302 | |
| 303 | |
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304 int Method::size(bool is_native) { |
| 0 | 305 // If native, then include pointers for native_function and signature_handler |
| 306 int extra_bytes = (is_native) ? 2*sizeof(address*) : 0; | |
| 307 int extra_words = align_size_up(extra_bytes, BytesPerWord) / BytesPerWord; | |
| 308 return align_object_size(header_size() + extra_words); | |
| 309 } | |
| 310 | |
| 311 | |
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312 Symbol* Method::klass_name() const { |
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313 Klass* k = method_holder(); |
| 0 | 314 assert(k->is_klass(), "must be klass"); |
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315 InstanceKlass* ik = (InstanceKlass*) k; |
| 0 | 316 return ik->name(); |
| 317 } | |
| 318 | |
| 319 | |
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320 void Method::set_interpreter_kind() { |
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321 int kind = Interpreter::method_kind(this); |
| 0 | 322 assert(kind != Interpreter::invalid, |
| 323 "interpreter entry must be valid"); | |
| 324 set_interpreter_kind(kind); | |
| 325 } | |
| 326 | |
| 327 | |
| 328 // Attempt to return method oop to original state. Clear any pointers | |
| 329 // (to objects outside the shared spaces). We won't be able to predict | |
| 330 // where they should point in a new JVM. Further initialize some | |
| 331 // entries now in order allow them to be write protected later. | |
| 332 | |
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333 void Method::remove_unshareable_info() { |
| 0 | 334 unlink_method(); |
| 335 set_interpreter_kind(); | |
| 336 } | |
| 337 | |
| 338 | |
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339 bool Method::was_executed_more_than(int n) { |
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340 // Invocation counter is reset when the Method* is compiled. |
| 0 | 341 // If the method has compiled code we therefore assume it has |
| 342 // be excuted more than n times. | |
| 343 if (is_accessor() || is_empty_method() || (code() != NULL)) { | |
| 344 // interpreter doesn't bump invocation counter of trivial methods | |
| 345 // compiler does not bump invocation counter of compiled methods | |
| 346 return true; | |
| 1783 | 347 } |
| 348 else if (_invocation_counter.carry() || (method_data() != NULL && method_data()->invocation_counter()->carry())) { | |
| 0 | 349 // The carry bit is set when the counter overflows and causes |
| 350 // a compilation to occur. We don't know how many times | |
| 351 // the counter has been reset, so we simply assume it has | |
| 352 // been executed more than n times. | |
| 353 return true; | |
| 354 } else { | |
| 355 return invocation_count() > n; | |
| 356 } | |
| 357 } | |
| 358 | |
| 359 #ifndef PRODUCT | |
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360 void Method::print_invocation_count() { |
| 0 | 361 if (is_static()) tty->print("static "); |
| 362 if (is_final()) tty->print("final "); | |
| 363 if (is_synchronized()) tty->print("synchronized "); | |
| 364 if (is_native()) tty->print("native "); | |
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365 method_holder()->name()->print_symbol_on(tty); |
| 0 | 366 tty->print("."); |
| 367 name()->print_symbol_on(tty); | |
| 368 signature()->print_symbol_on(tty); | |
| 369 | |
| 370 if (WizardMode) { | |
| 371 // dump the size of the byte codes | |
| 372 tty->print(" {%d}", code_size()); | |
| 373 } | |
| 374 tty->cr(); | |
| 375 | |
| 376 tty->print_cr (" interpreter_invocation_count: %8d ", interpreter_invocation_count()); | |
| 377 tty->print_cr (" invocation_counter: %8d ", invocation_count()); | |
| 378 tty->print_cr (" backedge_counter: %8d ", backedge_count()); | |
| 379 if (CountCompiledCalls) { | |
| 380 tty->print_cr (" compiled_invocation_count: %8d ", compiled_invocation_count()); | |
| 381 } | |
| 382 | |
| 383 } | |
| 384 #endif | |
| 385 | |
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386 // Build a MethodData* object to hold information about this method |
| 0 | 387 // collected in the interpreter. |
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388 void Method::build_interpreter_method_data(methodHandle method, TRAPS) { |
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389 // Do not profile method if current thread holds the pending list lock, |
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390 // which avoids deadlock for acquiring the MethodData_lock. |
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391 if (InstanceRefKlass::owns_pending_list_lock((JavaThread*)THREAD)) { |
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392 return; |
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393 } |
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394 |
| 0 | 395 // Grab a lock here to prevent multiple |
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396 // MethodData*s from being created. |
| 0 | 397 MutexLocker ml(MethodData_lock, THREAD); |
| 398 if (method->method_data() == NULL) { | |
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399 ClassLoaderData* loader_data = method->method_holder()->class_loader_data(); |
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400 MethodData* method_data = MethodData::allocate(loader_data, method, CHECK); |
| 0 | 401 method->set_method_data(method_data); |
| 402 if (PrintMethodData && (Verbose || WizardMode)) { | |
| 403 ResourceMark rm(THREAD); | |
| 404 tty->print("build_interpreter_method_data for "); | |
| 405 method->print_name(tty); | |
| 406 tty->cr(); | |
| 407 // At the end of the run, the MDO, full of data, will be dumped. | |
| 408 } | |
| 409 } | |
| 410 } | |
| 411 | |
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412 void Method::cleanup_inline_caches() { |
| 0 | 413 // The current system doesn't use inline caches in the interpreter |
| 414 // => nothing to do (keep this method around for future use) | |
| 415 } | |
| 416 | |
| 417 | |
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418 int Method::extra_stack_words() { |
| 710 | 419 // not an inline function, to avoid a header dependency on Interpreter |
| 1506 | 420 return extra_stack_entries() * Interpreter::stackElementSize; |
| 710 | 421 } |
| 422 | |
| 423 | |
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424 void Method::compute_size_of_parameters(Thread *thread) { |
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425 ArgumentSizeComputer asc(signature()); |
| 0 | 426 set_size_of_parameters(asc.size() + (is_static() ? 0 : 1)); |
| 427 } | |
| 428 | |
| 429 #ifdef CC_INTERP | |
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430 void Method::set_result_index(BasicType type) { |
| 0 | 431 _result_index = Interpreter::BasicType_as_index(type); |
| 432 } | |
| 433 #endif | |
| 434 | |
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435 BasicType Method::result_type() const { |
| 0 | 436 ResultTypeFinder rtf(signature()); |
| 437 return rtf.type(); | |
| 438 } | |
| 439 | |
| 440 | |
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441 bool Method::is_empty_method() const { |
| 0 | 442 return code_size() == 1 |
| 443 && *code_base() == Bytecodes::_return; | |
| 444 } | |
| 445 | |
| 446 | |
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447 bool Method::is_vanilla_constructor() const { |
| 0 | 448 // Returns true if this method is a vanilla constructor, i.e. an "<init>" "()V" method |
| 449 // which only calls the superclass vanilla constructor and possibly does stores of | |
| 450 // zero constants to local fields: | |
| 451 // | |
| 452 // aload_0 | |
| 453 // invokespecial | |
| 454 // indexbyte1 | |
| 455 // indexbyte2 | |
| 456 // | |
| 457 // followed by an (optional) sequence of: | |
| 458 // | |
| 459 // aload_0 | |
| 460 // aconst_null / iconst_0 / fconst_0 / dconst_0 | |
| 461 // putfield | |
| 462 // indexbyte1 | |
| 463 // indexbyte2 | |
| 464 // | |
| 465 // followed by: | |
| 466 // | |
| 467 // return | |
| 468 | |
| 469 assert(name() == vmSymbols::object_initializer_name(), "Should only be called for default constructors"); | |
| 470 assert(signature() == vmSymbols::void_method_signature(), "Should only be called for default constructors"); | |
| 471 int size = code_size(); | |
| 472 // Check if size match | |
| 473 if (size == 0 || size % 5 != 0) return false; | |
| 474 address cb = code_base(); | |
| 475 int last = size - 1; | |
| 476 if (cb[0] != Bytecodes::_aload_0 || cb[1] != Bytecodes::_invokespecial || cb[last] != Bytecodes::_return) { | |
| 477 // Does not call superclass default constructor | |
| 478 return false; | |
| 479 } | |
| 480 // Check optional sequence | |
| 481 for (int i = 4; i < last; i += 5) { | |
| 482 if (cb[i] != Bytecodes::_aload_0) return false; | |
| 483 if (!Bytecodes::is_zero_const(Bytecodes::cast(cb[i+1]))) return false; | |
| 484 if (cb[i+2] != Bytecodes::_putfield) return false; | |
| 485 } | |
| 486 return true; | |
| 487 } | |
| 488 | |
| 489 | |
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490 bool Method::compute_has_loops_flag() { |
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491 BytecodeStream bcs(this); |
| 0 | 492 Bytecodes::Code bc; |
| 493 | |
| 494 while ((bc = bcs.next()) >= 0) { | |
| 495 switch( bc ) { | |
| 496 case Bytecodes::_ifeq: | |
| 497 case Bytecodes::_ifnull: | |
| 498 case Bytecodes::_iflt: | |
| 499 case Bytecodes::_ifle: | |
| 500 case Bytecodes::_ifne: | |
| 501 case Bytecodes::_ifnonnull: | |
| 502 case Bytecodes::_ifgt: | |
| 503 case Bytecodes::_ifge: | |
| 504 case Bytecodes::_if_icmpeq: | |
| 505 case Bytecodes::_if_icmpne: | |
| 506 case Bytecodes::_if_icmplt: | |
| 507 case Bytecodes::_if_icmpgt: | |
| 508 case Bytecodes::_if_icmple: | |
| 509 case Bytecodes::_if_icmpge: | |
| 510 case Bytecodes::_if_acmpeq: | |
| 511 case Bytecodes::_if_acmpne: | |
| 512 case Bytecodes::_goto: | |
| 513 case Bytecodes::_jsr: | |
| 514 if( bcs.dest() < bcs.next_bci() ) _access_flags.set_has_loops(); | |
| 515 break; | |
| 516 | |
| 517 case Bytecodes::_goto_w: | |
| 518 case Bytecodes::_jsr_w: | |
| 519 if( bcs.dest_w() < bcs.next_bci() ) _access_flags.set_has_loops(); | |
| 520 break; | |
| 521 } | |
| 522 } | |
| 523 _access_flags.set_loops_flag_init(); | |
| 524 return _access_flags.has_loops(); | |
| 525 } | |
| 526 | |
| 527 | |
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528 bool Method::is_final_method() const { |
| 0 | 529 // %%% Should return true for private methods also, |
| 530 // since there is no way to override them. | |
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531 return is_final() || method_holder()->is_final(); |
| 0 | 532 } |
| 533 | |
| 534 | |
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535 bool Method::is_strict_method() const { |
| 0 | 536 return is_strict(); |
| 537 } | |
| 538 | |
| 539 | |
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540 bool Method::can_be_statically_bound() const { |
| 0 | 541 if (is_final_method()) return true; |
| 542 return vtable_index() == nonvirtual_vtable_index; | |
| 543 } | |
| 544 | |
| 545 | |
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546 bool Method::is_accessor() const { |
| 0 | 547 if (code_size() != 5) return false; |
| 548 if (size_of_parameters() != 1) return false; | |
| 2142 | 549 if (java_code_at(0) != Bytecodes::_aload_0 ) return false; |
| 550 if (java_code_at(1) != Bytecodes::_getfield) return false; | |
| 551 if (java_code_at(4) != Bytecodes::_areturn && | |
| 552 java_code_at(4) != Bytecodes::_ireturn ) return false; | |
| 0 | 553 return true; |
| 554 } | |
| 555 | |
| 556 | |
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557 bool Method::is_initializer() const { |
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558 return name() == vmSymbols::object_initializer_name() || is_static_initializer(); |
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559 } |
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560 |
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561 bool Method::has_valid_initializer_flags() const { |
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562 return (is_static() || |
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563 method_holder()->major_version() < 51); |
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564 } |
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565 |
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566 bool Method::is_static_initializer() const { |
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567 // For classfiles version 51 or greater, ensure that the clinit method is |
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568 // static. Non-static methods with the name "<clinit>" are not static |
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569 // initializers. (older classfiles exempted for backward compatibility) |
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570 return name() == vmSymbols::class_initializer_name() && |
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571 has_valid_initializer_flags(); |
| 0 | 572 } |
| 573 | |
| 574 | |
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575 objArrayHandle Method::resolved_checked_exceptions_impl(Method* this_oop, TRAPS) { |
| 0 | 576 int length = this_oop->checked_exceptions_length(); |
| 577 if (length == 0) { // common case | |
| 578 return objArrayHandle(THREAD, Universe::the_empty_class_klass_array()); | |
| 579 } else { | |
| 580 methodHandle h_this(THREAD, this_oop); | |
| 1142 | 581 objArrayOop m_oop = oopFactory::new_objArray(SystemDictionary::Class_klass(), length, CHECK_(objArrayHandle())); |
| 0 | 582 objArrayHandle mirrors (THREAD, m_oop); |
| 583 for (int i = 0; i < length; i++) { | |
| 584 CheckedExceptionElement* table = h_this->checked_exceptions_start(); // recompute on each iteration, not gc safe | |
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585 Klass* k = h_this->constants()->klass_at(table[i].class_cp_index, CHECK_(objArrayHandle())); |
| 6983 | 586 assert(k->is_subclass_of(SystemDictionary::Throwable_klass()), "invalid exception class"); |
| 587 mirrors->obj_at_put(i, k->java_mirror()); | |
| 0 | 588 } |
| 589 return mirrors; | |
| 590 } | |
| 591 }; | |
| 592 | |
| 593 | |
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594 int Method::line_number_from_bci(int bci) const { |
| 0 | 595 if (bci == SynchronizationEntryBCI) bci = 0; |
| 596 assert(bci == 0 || 0 <= bci && bci < code_size(), "illegal bci"); | |
| 597 int best_bci = 0; | |
| 598 int best_line = -1; | |
| 599 | |
| 600 if (has_linenumber_table()) { | |
| 601 // The line numbers are a short array of 2-tuples [start_pc, line_number]. | |
| 602 // Not necessarily sorted and not necessarily one-to-one. | |
| 603 CompressedLineNumberReadStream stream(compressed_linenumber_table()); | |
| 604 while (stream.read_pair()) { | |
| 605 if (stream.bci() == bci) { | |
| 606 // perfect match | |
| 607 return stream.line(); | |
| 608 } else { | |
| 609 // update best_bci/line | |
| 610 if (stream.bci() < bci && stream.bci() >= best_bci) { | |
| 611 best_bci = stream.bci(); | |
| 612 best_line = stream.line(); | |
| 613 } | |
| 614 } | |
| 615 } | |
| 616 } | |
| 617 return best_line; | |
| 618 } | |
| 619 | |
| 620 | |
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621 bool Method::is_klass_loaded_by_klass_index(int klass_index) const { |
|
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622 if( constants()->tag_at(klass_index).is_unresolved_klass() ) { |
| 0 | 623 Thread *thread = Thread::current(); |
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624 Symbol* klass_name = constants()->klass_name_at(klass_index); |
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625 Handle loader(thread, method_holder()->class_loader()); |
| 6983 | 626 Handle prot (thread, method_holder()->protection_domain()); |
| 0 | 627 return SystemDictionary::find(klass_name, loader, prot, thread) != NULL; |
| 628 } else { | |
| 629 return true; | |
| 630 } | |
| 631 } | |
| 632 | |
| 633 | |
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634 bool Method::is_klass_loaded(int refinfo_index, bool must_be_resolved) const { |
|
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635 int klass_index = constants()->klass_ref_index_at(refinfo_index); |
| 0 | 636 if (must_be_resolved) { |
| 637 // Make sure klass is resolved in constantpool. | |
| 638 if (constants()->tag_at(klass_index).is_unresolved_klass()) return false; | |
| 639 } | |
| 640 return is_klass_loaded_by_klass_index(klass_index); | |
| 641 } | |
| 642 | |
| 643 | |
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644 void Method::set_native_function(address function, bool post_event_flag) { |
| 0 | 645 assert(function != NULL, "use clear_native_function to unregister natives"); |
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646 assert(!is_method_handle_intrinsic() || function == SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), ""); |
| 0 | 647 address* native_function = native_function_addr(); |
| 648 | |
| 649 // We can see racers trying to place the same native function into place. Once | |
| 650 // is plenty. | |
| 651 address current = *native_function; | |
| 652 if (current == function) return; | |
| 653 if (post_event_flag && JvmtiExport::should_post_native_method_bind() && | |
| 654 function != NULL) { | |
| 655 // native_method_throw_unsatisfied_link_error_entry() should only | |
| 656 // be passed when post_event_flag is false. | |
| 657 assert(function != | |
| 658 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
| 659 "post_event_flag mis-match"); | |
| 660 | |
| 661 // post the bind event, and possible change the bind function | |
| 662 JvmtiExport::post_native_method_bind(this, &function); | |
| 663 } | |
| 664 *native_function = function; | |
| 665 // This function can be called more than once. We must make sure that we always | |
| 666 // use the latest registered method -> check if a stub already has been generated. | |
| 667 // If so, we have to make it not_entrant. | |
| 668 nmethod* nm = code(); // Put it into local variable to guard against concurrent updates | |
| 669 if (nm != NULL) { | |
| 670 nm->make_not_entrant(); | |
| 671 } | |
| 672 } | |
| 673 | |
| 674 | |
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675 bool Method::has_native_function() const { |
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676 if (is_method_handle_intrinsic()) |
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677 return false; // special-cased in SharedRuntime::generate_native_wrapper |
| 0 | 678 address func = native_function(); |
| 679 return (func != NULL && func != SharedRuntime::native_method_throw_unsatisfied_link_error_entry()); | |
| 680 } | |
| 681 | |
| 682 | |
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683 void Method::clear_native_function() { |
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684 // Note: is_method_handle_intrinsic() is allowed here. |
| 0 | 685 set_native_function( |
| 686 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
| 687 !native_bind_event_is_interesting); | |
| 688 clear_code(); | |
| 689 } | |
| 690 | |
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691 address Method::critical_native_function() { |
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692 methodHandle mh(this); |
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693 return NativeLookup::lookup_critical_entry(mh); |
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694 } |
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695 |
| 0 | 696 |
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697 void Method::set_signature_handler(address handler) { |
| 0 | 698 address* signature_handler = signature_handler_addr(); |
| 699 *signature_handler = handler; | |
| 700 } | |
| 701 | |
| 702 | |
| 7998 | 703 void Method::print_made_not_compilable(int comp_level, bool is_osr, bool report, const char* reason) { |
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704 if (PrintCompilation && report) { |
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705 ttyLocker ttyl; |
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706 tty->print("made not %scompilable on ", is_osr ? "OSR " : ""); |
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707 if (comp_level == CompLevel_all) { |
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708 tty->print("all levels "); |
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709 } else { |
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710 tty->print("levels "); |
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711 for (int i = (int)CompLevel_none; i <= comp_level; i++) { |
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712 tty->print("%d ", i); |
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713 } |
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714 } |
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715 this->print_short_name(tty); |
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716 int size = this->code_size(); |
| 7998 | 717 if (size > 0) { |
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718 tty->print(" (%d bytes)", size); |
| 7998 | 719 } |
| 720 if (reason != NULL) { | |
| 721 tty->print(" %s", reason); | |
| 722 } | |
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723 tty->cr(); |
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724 } |
| 0 | 725 if ((TraceDeoptimization || LogCompilation) && (xtty != NULL)) { |
| 726 ttyLocker ttyl; | |
| 6843 | 727 xtty->begin_elem("make_not_%scompilable thread='" UINTX_FORMAT "'", |
| 728 is_osr ? "osr_" : "", os::current_thread_id()); | |
| 7998 | 729 if (reason != NULL) { |
| 730 xtty->print(" reason=\'%s\'", reason); | |
| 731 } | |
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732 xtty->method(this); |
| 0 | 733 xtty->stamp(); |
| 734 xtty->end_elem(); | |
| 735 } | |
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736 } |
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737 |
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738 bool Method::is_not_compilable(int comp_level) const { |
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739 if (number_of_breakpoints() > 0) |
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740 return true; |
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741 if (is_method_handle_intrinsic()) |
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742 return !is_synthetic(); // the generated adapters must be compiled |
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743 if (comp_level == CompLevel_any) |
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744 return is_not_c1_compilable() || is_not_c2_compilable(); |
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745 if (is_c1_compile(comp_level)) |
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746 return is_not_c1_compilable(); |
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747 if (is_c2_compile(comp_level)) |
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748 return is_not_c2_compilable(); |
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749 return false; |
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750 } |
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751 |
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752 // call this when compiler finds that this method is not compilable |
| 7998 | 753 void Method::set_not_compilable(int comp_level, bool report, const char* reason) { |
| 754 print_made_not_compilable(comp_level, /*is_osr*/ false, report, reason); | |
| 1783 | 755 if (comp_level == CompLevel_all) { |
| 756 set_not_c1_compilable(); | |
| 757 set_not_c2_compilable(); | |
| 758 } else { | |
|
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759 if (is_c1_compile(comp_level)) |
| 1783 | 760 set_not_c1_compilable(); |
|
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761 if (is_c2_compile(comp_level)) |
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762 set_not_c2_compilable(); |
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763 } |
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764 CompilationPolicy::policy()->disable_compilation(this); |
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765 } |
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766 |
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767 bool Method::is_not_osr_compilable(int comp_level) const { |
|
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768 if (is_not_compilable(comp_level)) |
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769 return true; |
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770 if (comp_level == CompLevel_any) |
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771 return is_not_c1_osr_compilable() || is_not_c2_osr_compilable(); |
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772 if (is_c1_compile(comp_level)) |
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773 return is_not_c1_osr_compilable(); |
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774 if (is_c2_compile(comp_level)) |
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775 return is_not_c2_osr_compilable(); |
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776 return false; |
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777 } |
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778 |
| 7998 | 779 void Method::set_not_osr_compilable(int comp_level, bool report, const char* reason) { |
| 780 print_made_not_compilable(comp_level, /*is_osr*/ true, report, reason); | |
|
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781 if (comp_level == CompLevel_all) { |
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782 set_not_c1_osr_compilable(); |
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783 set_not_c2_osr_compilable(); |
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784 } else { |
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785 if (is_c1_compile(comp_level)) |
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786 set_not_c1_osr_compilable(); |
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787 if (is_c2_compile(comp_level)) |
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788 set_not_c2_osr_compilable(); |
| 0 | 789 } |
| 1783 | 790 CompilationPolicy::policy()->disable_compilation(this); |
| 0 | 791 } |
| 792 | |
| 793 // Revert to using the interpreter and clear out the nmethod | |
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794 void Method::clear_code() { |
| 0 | 795 |
| 796 // this may be NULL if c2i adapters have not been made yet | |
| 797 // Only should happen at allocate time. | |
| 798 if (_adapter == NULL) { | |
| 799 _from_compiled_entry = NULL; | |
| 800 } else { | |
| 801 _from_compiled_entry = _adapter->get_c2i_entry(); | |
| 802 } | |
| 803 OrderAccess::storestore(); | |
| 804 _from_interpreted_entry = _i2i_entry; | |
| 805 OrderAccess::storestore(); | |
| 806 _code = NULL; | |
| 807 } | |
| 808 | |
| 809 // Called by class data sharing to remove any entry points (which are not shared) | |
|
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810 void Method::unlink_method() { |
| 0 | 811 _code = NULL; |
| 812 _i2i_entry = NULL; | |
| 813 _from_interpreted_entry = NULL; | |
| 814 if (is_native()) { | |
| 815 *native_function_addr() = NULL; | |
| 816 set_signature_handler(NULL); | |
| 817 } | |
| 818 NOT_PRODUCT(set_compiled_invocation_count(0);) | |
| 819 invocation_counter()->reset(); | |
| 820 backedge_counter()->reset(); | |
| 821 _adapter = NULL; | |
| 822 _from_compiled_entry = NULL; | |
| 823 assert(_method_data == NULL, "unexpected method data?"); | |
| 824 set_method_data(NULL); | |
| 825 set_interpreter_throwout_count(0); | |
| 826 set_interpreter_invocation_count(0); | |
| 827 } | |
| 828 | |
| 829 // Called when the method_holder is getting linked. Setup entrypoints so the method | |
| 830 // is ready to be called from interpreter, compiler, and vtables. | |
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831 void Method::link_method(methodHandle h_method, TRAPS) { |
| 3748 | 832 // If the code cache is full, we may reenter this function for the |
| 833 // leftover methods that weren't linked. | |
| 834 if (_i2i_entry != NULL) return; | |
| 835 | |
| 0 | 836 assert(_adapter == NULL, "init'd to NULL" ); |
| 837 assert( _code == NULL, "nothing compiled yet" ); | |
| 838 | |
| 839 // Setup interpreter entrypoint | |
| 840 assert(this == h_method(), "wrong h_method()" ); | |
| 841 address entry = Interpreter::entry_for_method(h_method); | |
| 842 assert(entry != NULL, "interpreter entry must be non-null"); | |
| 843 // Sets both _i2i_entry and _from_interpreted_entry | |
| 844 set_interpreter_entry(entry); | |
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845 if (is_native() && !is_method_handle_intrinsic()) { |
| 0 | 846 set_native_function( |
| 847 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
| 848 !native_bind_event_is_interesting); | |
| 849 } | |
| 850 | |
| 851 // Setup compiler entrypoint. This is made eagerly, so we do not need | |
| 852 // special handling of vtables. An alternative is to make adapters more | |
| 853 // lazily by calling make_adapter() from from_compiled_entry() for the | |
| 854 // normal calls. For vtable calls life gets more complicated. When a | |
| 855 // call-site goes mega-morphic we need adapters in all methods which can be | |
| 856 // called from the vtable. We need adapters on such methods that get loaded | |
| 857 // later. Ditto for mega-morphic itable calls. If this proves to be a | |
| 858 // problem we'll make these lazily later. | |
|
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859 (void) make_adapters(h_method, CHECK); |
| 0 | 860 |
| 861 // ONLY USE the h_method now as make_adapter may have blocked | |
| 862 | |
| 863 } | |
| 864 | |
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865 address Method::make_adapters(methodHandle mh, TRAPS) { |
| 0 | 866 // Adapters for compiled code are made eagerly here. They are fairly |
| 867 // small (generally < 100 bytes) and quick to make (and cached and shared) | |
| 868 // so making them eagerly shouldn't be too expensive. | |
| 869 AdapterHandlerEntry* adapter = AdapterHandlerLibrary::get_adapter(mh); | |
| 870 if (adapter == NULL ) { | |
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871 THROW_MSG_NULL(vmSymbols::java_lang_VirtualMachineError(), "out of space in CodeCache for adapters"); |
| 0 | 872 } |
| 873 | |
| 874 mh->set_adapter_entry(adapter); | |
| 875 mh->_from_compiled_entry = adapter->get_c2i_entry(); | |
| 876 return adapter->get_c2i_entry(); | |
| 877 } | |
| 878 | |
| 879 // The verified_code_entry() must be called when a invoke is resolved | |
| 880 // on this method. | |
| 881 | |
| 882 // It returns the compiled code entry point, after asserting not null. | |
| 883 // This function is called after potential safepoints so that nmethod | |
| 884 // or adapter that it points to is still live and valid. | |
| 885 // This function must not hit a safepoint! | |
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886 address Method::verified_code_entry() { |
| 0 | 887 debug_only(No_Safepoint_Verifier nsv;) |
| 1202 | 888 nmethod *code = (nmethod *)OrderAccess::load_ptr_acquire(&_code); |
| 889 if (code == NULL && UseCodeCacheFlushing) { | |
| 890 nmethod *saved_code = CodeCache::find_and_remove_saved_code(this); | |
| 891 if (saved_code != NULL) { | |
| 892 methodHandle method(this); | |
| 893 assert( ! saved_code->is_osr_method(), "should not get here for osr" ); | |
| 894 set_code( method, saved_code ); | |
| 895 } | |
| 896 } | |
| 897 | |
| 0 | 898 assert(_from_compiled_entry != NULL, "must be set"); |
| 899 return _from_compiled_entry; | |
| 900 } | |
| 901 | |
| 902 // Check that if an nmethod ref exists, it has a backlink to this or no backlink at all | |
| 903 // (could be racing a deopt). | |
| 904 // Not inline to avoid circular ref. | |
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905 bool Method::check_code() const { |
| 0 | 906 // cached in a register or local. There's a race on the value of the field. |
| 907 nmethod *code = (nmethod *)OrderAccess::load_ptr_acquire(&_code); | |
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908 return code == NULL || (code->method() == NULL) || (code->method() == (Method*)this && !code->is_osr_method()); |
| 0 | 909 } |
| 910 | |
| 911 // Install compiled code. Instantly it can execute. | |
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912 void Method::set_code(methodHandle mh, nmethod *code) { |
| 0 | 913 assert( code, "use clear_code to remove code" ); |
| 914 assert( mh->check_code(), "" ); | |
| 915 | |
| 916 guarantee(mh->adapter() != NULL, "Adapter blob must already exist!"); | |
| 917 | |
| 918 // These writes must happen in this order, because the interpreter will | |
| 919 // directly jump to from_interpreted_entry which jumps to an i2c adapter | |
| 920 // which jumps to _from_compiled_entry. | |
| 921 mh->_code = code; // Assign before allowing compiled code to exec | |
| 922 | |
| 923 int comp_level = code->comp_level(); | |
| 924 // In theory there could be a race here. In practice it is unlikely | |
| 925 // and not worth worrying about. | |
| 1783 | 926 if (comp_level > mh->highest_comp_level()) { |
| 927 mh->set_highest_comp_level(comp_level); | |
| 0 | 928 } |
| 929 | |
| 930 OrderAccess::storestore(); | |
| 1692 | 931 #ifdef SHARK |
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932 mh->_from_interpreted_entry = code->insts_begin(); |
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933 #else //!SHARK |
| 0 | 934 mh->_from_compiled_entry = code->verified_entry_point(); |
| 935 OrderAccess::storestore(); | |
| 936 // Instantly compiled code can execute. | |
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937 if (!mh->is_method_handle_intrinsic()) |
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938 mh->_from_interpreted_entry = mh->get_i2c_entry(); |
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939 #endif //!SHARK |
| 0 | 940 } |
| 941 | |
| 942 | |
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943 bool Method::is_overridden_in(Klass* k) const { |
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944 InstanceKlass* ik = InstanceKlass::cast(k); |
| 0 | 945 |
| 946 if (ik->is_interface()) return false; | |
| 947 | |
| 948 // If method is an interface, we skip it - except if it | |
| 949 // is a miranda method | |
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950 if (method_holder()->is_interface()) { |
| 0 | 951 // Check that method is not a miranda method |
| 952 if (ik->lookup_method(name(), signature()) == NULL) { | |
| 953 // No implementation exist - so miranda method | |
| 954 return false; | |
| 955 } | |
| 956 return true; | |
| 957 } | |
| 958 | |
| 959 assert(ik->is_subclass_of(method_holder()), "should be subklass"); | |
| 960 assert(ik->vtable() != NULL, "vtable should exist"); | |
| 961 if (vtable_index() == nonvirtual_vtable_index) { | |
| 962 return false; | |
| 963 } else { | |
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964 Method* vt_m = ik->method_at_vtable(vtable_index()); |
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965 return vt_m != this; |
| 0 | 966 } |
| 967 } | |
| 968 | |
| 969 | |
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970 // give advice about whether this Method* should be cached or not |
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971 bool Method::should_not_be_cached() const { |
|
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972 if (is_old()) { |
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973 // This method has been redefined. It is either EMCP or obsolete |
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974 // and we don't want to cache it because that would pin the method |
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975 // down and prevent it from being collectible if and when it |
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976 // finishes executing. |
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977 return true; |
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978 } |
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979 |
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980 // caching this method should be just fine |
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981 return false; |
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982 } |
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983 |
| 710 | 984 // Constant pool structure for invoke methods: |
| 985 enum { | |
|
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986 _imcp_invoke_name = 1, // utf8: 'invokeExact', etc. |
|
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987 _imcp_invoke_signature, // utf8: (variable Symbol*) |
| 710 | 988 _imcp_limit |
| 989 }; | |
| 990 | |
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991 // Test if this method is an MH adapter frame generated by Java code. |
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992 // Cf. java/lang/invoke/InvokerBytecodeGenerator |
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993 bool Method::is_compiled_lambda_form() const { |
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994 return intrinsic_id() == vmIntrinsics::_compiledLambdaForm; |
| 710 | 995 } |
| 996 | |
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997 // Test if this method is an internal MH primitive method. |
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998 bool Method::is_method_handle_intrinsic() const { |
|
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999 vmIntrinsics::ID iid = intrinsic_id(); |
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1000 return (MethodHandles::is_signature_polymorphic(iid) && |
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1001 MethodHandles::is_signature_polymorphic_intrinsic(iid)); |
|
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1002 } |
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1003 |
|
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1004 bool Method::has_member_arg() const { |
|
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1005 vmIntrinsics::ID iid = intrinsic_id(); |
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1006 return (MethodHandles::is_signature_polymorphic(iid) && |
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1007 MethodHandles::has_member_arg(iid)); |
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1008 } |
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1009 |
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1010 // Make an instance of a signature-polymorphic internal MH primitive. |
|
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1011 methodHandle Method::make_method_handle_intrinsic(vmIntrinsics::ID iid, |
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1012 Symbol* signature, |
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1013 TRAPS) { |
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1014 ResourceMark rm; |
| 710 | 1015 methodHandle empty; |
| 1016 | |
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1017 KlassHandle holder = SystemDictionary::MethodHandle_klass(); |
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1018 Symbol* name = MethodHandles::signature_polymorphic_intrinsic_name(iid); |
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1019 assert(iid == MethodHandles::signature_polymorphic_name_id(name), ""); |
| 710 | 1020 if (TraceMethodHandles) { |
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1021 tty->print_cr("make_method_handle_intrinsic MH.%s%s", name->as_C_string(), signature->as_C_string()); |
| 710 | 1022 } |
| 1023 | |
|
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1024 // invariant: cp->symbol_at_put is preceded by a refcount increment (more usually a lookup) |
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1025 name->increment_refcount(); |
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1026 signature->increment_refcount(); |
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1027 |
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1028 int cp_length = _imcp_limit; |
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1029 ClassLoaderData* loader_data = holder->class_loader_data(); |
| 710 | 1030 constantPoolHandle cp; |
| 1031 { | |
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1032 ConstantPool* cp_oop = ConstantPool::allocate(loader_data, cp_length, CHECK_(empty)); |
| 710 | 1033 cp = constantPoolHandle(THREAD, cp_oop); |
| 1034 } | |
|
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1035 cp->set_pool_holder(InstanceKlass::cast(holder())); |
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1036 cp->symbol_at_put(_imcp_invoke_name, name); |
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1037 cp->symbol_at_put(_imcp_invoke_signature, signature); |
|
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1038 cp->set_has_preresolution(); |
| 710 | 1039 |
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1040 // decide on access bits: public or not? |
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1041 int flags_bits = (JVM_ACC_NATIVE | JVM_ACC_SYNTHETIC | JVM_ACC_FINAL); |
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1042 bool must_be_static = MethodHandles::is_signature_polymorphic_static(iid); |
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1043 if (must_be_static) flags_bits |= JVM_ACC_STATIC; |
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1044 assert((flags_bits & JVM_ACC_PUBLIC) == 0, "do not expose these methods"); |
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1045 |
| 710 | 1046 methodHandle m; |
| 1047 { | |
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1048 Method* m_oop = Method::allocate(loader_data, 0, |
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1049 accessFlags_from(flags_bits), |
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1050 0, 0, 0, 0, 0, 0, |
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1051 ConstMethod::NORMAL, CHECK_(empty)); |
| 710 | 1052 m = methodHandle(THREAD, m_oop); |
| 1053 } | |
| 1054 m->set_constants(cp()); | |
| 1055 m->set_name_index(_imcp_invoke_name); | |
| 1056 m->set_signature_index(_imcp_invoke_signature); | |
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1057 assert(MethodHandles::is_signature_polymorphic_name(m->name()), ""); |
|
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1058 assert(m->signature() == signature, ""); |
| 710 | 1059 #ifdef CC_INTERP |
|
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1060 ResultTypeFinder rtf(signature); |
| 710 | 1061 m->set_result_index(rtf.type()); |
| 1062 #endif | |
| 1063 m->compute_size_of_parameters(THREAD); | |
|
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1064 m->init_intrinsic_id(); |
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1065 assert(m->is_method_handle_intrinsic(), ""); |
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1066 #ifdef ASSERT |
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1067 if (!MethodHandles::is_signature_polymorphic(m->intrinsic_id())) m->print(); |
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1068 assert(MethodHandles::is_signature_polymorphic(m->intrinsic_id()), "must be an invoker"); |
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1069 assert(m->intrinsic_id() == iid, "correctly predicted iid"); |
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1070 #endif //ASSERT |
| 710 | 1071 |
| 1072 // Finally, set up its entry points. | |
| 1073 assert(m->can_be_statically_bound(), ""); | |
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1074 m->set_vtable_index(Method::nonvirtual_vtable_index); |
| 710 | 1075 m->link_method(m, CHECK_(empty)); |
| 1076 | |
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1077 if (TraceMethodHandles && (Verbose || WizardMode)) |
| 710 | 1078 m->print_on(tty); |
| 1079 | |
| 1080 return m; | |
| 1081 } | |
| 1082 | |
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1083 Klass* Method::check_non_bcp_klass(Klass* klass) { |
| 6983 | 1084 if (klass != NULL && klass->class_loader() != NULL) { |
| 1085 if (klass->oop_is_objArray()) | |
|
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1086 klass = ObjArrayKlass::cast(klass)->bottom_klass(); |
|
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1087 return klass; |
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1088 } |
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1089 return NULL; |
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1090 } |
| 710 | 1091 |
|
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1092 |
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1093 methodHandle Method::clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length, |
| 0 | 1094 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS) { |
| 1095 // Code below does not work for native methods - they should never get rewritten anyway | |
| 1096 assert(!m->is_native(), "cannot rewrite native methods"); | |
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1097 // Allocate new Method* |
| 0 | 1098 AccessFlags flags = m->access_flags(); |
|
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1099 u2 generic_signature_index = m->generic_signature_index(); |
| 0 | 1100 int checked_exceptions_len = m->checked_exceptions_length(); |
| 1101 int localvariable_len = m->localvariable_table_length(); | |
|
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1102 int exception_table_len = m->exception_table_length(); |
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1103 int method_parameters_len = m->method_parameters_length(); |
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1104 |
| 6934 | 1105 ClassLoaderData* loader_data = m->method_holder()->class_loader_data(); |
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1106 Method* newm_oop = Method::allocate(loader_data, |
| 6934 | 1107 new_code_length, |
| 1108 flags, | |
| 1109 new_compressed_linenumber_size, | |
| 1110 localvariable_len, | |
| 1111 exception_table_len, | |
| 1112 checked_exceptions_len, | |
|
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1113 method_parameters_len, |
|
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1114 generic_signature_index, |
| 6934 | 1115 m->method_type(), |
| 1116 CHECK_(methodHandle())); | |
| 0 | 1117 methodHandle newm (THREAD, newm_oop); |
| 1118 int new_method_size = newm->method_size(); | |
|
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1119 |
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1120 // Create a shallow copy of Method part, but be careful to preserve the new ConstMethod* |
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1121 ConstMethod* newcm = newm->constMethod(); |
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1122 int new_const_method_size = newm->constMethod()->size(); |
|
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1123 |
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1124 memcpy(newm(), m(), sizeof(Method)); |
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1125 |
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1126 // Create shallow copy of ConstMethod. |
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1127 memcpy(newcm, m->constMethod(), sizeof(ConstMethod)); |
|
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1128 |
| 0 | 1129 // Reset correct method/const method, method size, and parameter info |
| 1130 newm->set_constMethod(newcm); | |
| 1131 newm->constMethod()->set_code_size(new_code_length); | |
| 1132 newm->constMethod()->set_constMethod_size(new_const_method_size); | |
| 1133 newm->set_method_size(new_method_size); | |
| 1134 assert(newm->code_size() == new_code_length, "check"); | |
| 1135 assert(newm->checked_exceptions_length() == checked_exceptions_len, "check"); | |
|
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1136 assert(newm->exception_table_length() == exception_table_len, "check"); |
| 0 | 1137 assert(newm->localvariable_table_length() == localvariable_len, "check"); |
| 1138 // Copy new byte codes | |
| 1139 memcpy(newm->code_base(), new_code, new_code_length); | |
| 1140 // Copy line number table | |
| 1141 if (new_compressed_linenumber_size > 0) { | |
| 1142 memcpy(newm->compressed_linenumber_table(), | |
| 1143 new_compressed_linenumber_table, | |
| 1144 new_compressed_linenumber_size); | |
| 1145 } | |
| 1146 // Copy checked_exceptions | |
| 1147 if (checked_exceptions_len > 0) { | |
| 1148 memcpy(newm->checked_exceptions_start(), | |
| 1149 m->checked_exceptions_start(), | |
| 1150 checked_exceptions_len * sizeof(CheckedExceptionElement)); | |
| 1151 } | |
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1152 // Copy exception table |
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1153 if (exception_table_len > 0) { |
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1154 memcpy(newm->exception_table_start(), |
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1155 m->exception_table_start(), |
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1156 exception_table_len * sizeof(ExceptionTableElement)); |
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1157 } |
| 0 | 1158 // Copy local variable number table |
| 1159 if (localvariable_len > 0) { | |
| 1160 memcpy(newm->localvariable_table_start(), | |
| 1161 m->localvariable_table_start(), | |
| 1162 localvariable_len * sizeof(LocalVariableTableElement)); | |
| 1163 } | |
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1164 // Copy stackmap table |
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1165 if (m->has_stackmap_table()) { |
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1166 int code_attribute_length = m->stackmap_data()->length(); |
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1167 Array<u1>* stackmap_data = |
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1168 MetadataFactory::new_array<u1>(loader_data, code_attribute_length, 0, CHECK_NULL); |
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1169 memcpy((void*)stackmap_data->adr_at(0), |
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1170 (void*)m->stackmap_data()->adr_at(0), code_attribute_length); |
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1171 newm->set_stackmap_data(stackmap_data); |
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1172 } |
|
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1173 |
| 0 | 1174 return newm; |
| 1175 } | |
| 1176 | |
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1177 vmSymbols::SID Method::klass_id_for_intrinsics(Klass* holder) { |
| 0 | 1178 // if loader is not the default loader (i.e., != NULL), we can't know the intrinsics |
| 1179 // because we are not loading from core libraries | |
| 6894 | 1180 // exception: the AES intrinsics come from lib/ext/sunjce_provider.jar |
| 1181 // which does not use the class default class loader so we check for its loader here | |
| 1182 if ((InstanceKlass::cast(holder)->class_loader() != NULL) && | |
| 1183 InstanceKlass::cast(holder)->class_loader()->klass()->name() != vmSymbols::sun_misc_Launcher_ExtClassLoader()) { | |
|
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1184 return vmSymbols::NO_SID; // regardless of name, no intrinsics here |
| 6894 | 1185 } |
| 0 | 1186 |
| 1187 // see if the klass name is well-known: | |
|
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1188 Symbol* klass_name = InstanceKlass::cast(holder)->name(); |
|
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1189 return vmSymbols::find_sid(klass_name); |
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1190 } |
|
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1191 |
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1192 void Method::init_intrinsic_id() { |
|
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1193 assert(_intrinsic_id == vmIntrinsics::_none, "do this just once"); |
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1194 const uintptr_t max_id_uint = right_n_bits((int)(sizeof(_intrinsic_id) * BitsPerByte)); |
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1195 assert((uintptr_t)vmIntrinsics::ID_LIMIT <= max_id_uint, "else fix size"); |
|
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1196 assert(intrinsic_id_size_in_bytes() == sizeof(_intrinsic_id), ""); |
|
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1197 |
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1198 // the klass name is well-known: |
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1199 vmSymbols::SID klass_id = klass_id_for_intrinsics(method_holder()); |
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1200 assert(klass_id != vmSymbols::NO_SID, "caller responsibility"); |
| 0 | 1201 |
| 1202 // ditto for method and signature: | |
| 1203 vmSymbols::SID name_id = vmSymbols::find_sid(name()); | |
|
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1204 if (klass_id != vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_MethodHandle) |
|
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1205 && name_id == vmSymbols::NO_SID) |
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1206 return; |
| 0 | 1207 vmSymbols::SID sig_id = vmSymbols::find_sid(signature()); |
|
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1208 if (klass_id != vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_MethodHandle) |
|
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1209 && sig_id == vmSymbols::NO_SID) return; |
| 0 | 1210 jshort flags = access_flags().as_short(); |
| 1211 | |
|
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1212 vmIntrinsics::ID id = vmIntrinsics::find_id(klass_id, name_id, sig_id, flags); |
|
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1213 if (id != vmIntrinsics::_none) { |
|
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1214 set_intrinsic_id(id); |
|
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1215 return; |
|
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|
1216 } |
|
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1217 |
| 0 | 1218 // A few slightly irregular cases: |
| 1219 switch (klass_id) { | |
| 1220 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_StrictMath): | |
| 1221 // Second chance: check in regular Math. | |
| 1222 switch (name_id) { | |
| 1223 case vmSymbols::VM_SYMBOL_ENUM_NAME(min_name): | |
| 1224 case vmSymbols::VM_SYMBOL_ENUM_NAME(max_name): | |
| 1225 case vmSymbols::VM_SYMBOL_ENUM_NAME(sqrt_name): | |
| 1226 // pretend it is the corresponding method in the non-strict class: | |
| 1227 klass_id = vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_Math); | |
|
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1228 id = vmIntrinsics::find_id(klass_id, name_id, sig_id, flags); |
| 0 | 1229 break; |
| 1230 } | |
|
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|
1231 break; |
|
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|
1232 |
|
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1233 // Signature-polymorphic methods: MethodHandle.invoke*, InvokeDynamic.*. |
|
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1234 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_MethodHandle): |
|
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1235 if (!is_native()) break; |
|
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1236 id = MethodHandles::signature_polymorphic_name_id(method_holder(), name()); |
|
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1237 if (is_static() != MethodHandles::is_signature_polymorphic_static(id)) |
|
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1238 id = vmIntrinsics::_none; |
|
1507
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|
1239 break; |
| 0 | 1240 } |
| 1241 | |
|
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1242 if (id != vmIntrinsics::_none) { |
|
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1243 // Set up its iid. It is an alias method. |
|
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1244 set_intrinsic_id(id); |
|
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|
1245 return; |
|
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|
1246 } |
| 0 | 1247 } |
| 1248 | |
|
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1249 // These two methods are static since a GC may move the Method |
|
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1250 bool Method::load_signature_classes(methodHandle m, TRAPS) { |
|
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1251 if (THREAD->is_Compiler_thread()) { |
|
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1252 // There is nothing useful this routine can do from within the Compile thread. |
|
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1253 // Hopefully, the signature contains only well-known classes. |
|
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1254 // We could scan for this and return true/false, but the caller won't care. |
|
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|
1255 return false; |
|
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|
1256 } |
| 0 | 1257 bool sig_is_loaded = true; |
|
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|
1258 Handle class_loader(THREAD, m->method_holder()->class_loader()); |
|
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|
1259 Handle protection_domain(THREAD, m->method_holder()->protection_domain()); |
|
2177
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|
1260 ResourceMark rm(THREAD); |
|
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|
1261 Symbol* signature = m->signature(); |
| 0 | 1262 for(SignatureStream ss(signature); !ss.is_done(); ss.next()) { |
| 1263 if (ss.is_object()) { | |
|
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|
1264 Symbol* sym = ss.as_symbol(CHECK_(false)); |
|
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|
1265 Symbol* name = sym; |
|
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1266 Klass* klass = SystemDictionary::resolve_or_null(name, class_loader, |
| 0 | 1267 protection_domain, THREAD); |
|
104
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|
1268 // We are loading classes eagerly. If a ClassNotFoundException or |
|
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|
1269 // a LinkageError was generated, be sure to ignore it. |
| 0 | 1270 if (HAS_PENDING_EXCEPTION) { |
| 1142 | 1271 if (PENDING_EXCEPTION->is_a(SystemDictionary::ClassNotFoundException_klass()) || |
| 1272 PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) { | |
| 0 | 1273 CLEAR_PENDING_EXCEPTION; |
| 1274 } else { | |
| 1275 return false; | |
| 1276 } | |
| 1277 } | |
| 1278 if( klass == NULL) { sig_is_loaded = false; } | |
| 1279 } | |
| 1280 } | |
| 1281 return sig_is_loaded; | |
| 1282 } | |
| 1283 | |
|
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1284 bool Method::has_unloaded_classes_in_signature(methodHandle m, TRAPS) { |
|
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|
1285 Handle class_loader(THREAD, m->method_holder()->class_loader()); |
|
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|
1286 Handle protection_domain(THREAD, m->method_holder()->protection_domain()); |
|
2177
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|
1287 ResourceMark rm(THREAD); |
|
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|
1288 Symbol* signature = m->signature(); |
| 0 | 1289 for(SignatureStream ss(signature); !ss.is_done(); ss.next()) { |
| 1290 if (ss.type() == T_OBJECT) { | |
|
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|
1291 Symbol* name = ss.as_symbol_or_null(); |
|
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|
1292 if (name == NULL) return true; |
|
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1293 Klass* klass = SystemDictionary::find(name, class_loader, protection_domain, THREAD); |
| 0 | 1294 if (klass == NULL) return true; |
| 1295 } | |
| 1296 } | |
| 1297 return false; | |
| 1298 } | |
| 1299 | |
| 1300 // Exposed so field engineers can debug VM | |
|
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1301 void Method::print_short_name(outputStream* st) { |
| 0 | 1302 ResourceMark rm; |
| 1303 #ifdef PRODUCT | |
|
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1304 st->print(" %s::", method_holder()->external_name()); |
| 0 | 1305 #else |
|
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1306 st->print(" %s::", method_holder()->internal_name()); |
| 0 | 1307 #endif |
| 1308 name()->print_symbol_on(st); | |
| 1309 if (WizardMode) signature()->print_symbol_on(st); | |
|
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|
1310 else if (MethodHandles::is_signature_polymorphic(intrinsic_id())) |
|
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|
1311 MethodHandles::print_as_basic_type_signature_on(st, signature(), true); |
| 0 | 1312 } |
| 1313 | |
| 1314 // This is only done during class loading, so it is OK to assume method_idnum matches the methods() array | |
|
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1315 static void reorder_based_on_method_index(Array<Method*>* methods, |
|
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1316 Array<AnnotationArray*>* annotations, |
|
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1317 GrowableArray<AnnotationArray*>* temp_array) { |
| 0 | 1318 if (annotations == NULL) { |
| 1319 return; | |
| 1320 } | |
| 1321 | |
| 1322 int length = methods->length(); | |
| 1323 int i; | |
| 1324 // Copy to temp array | |
|
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1325 temp_array->clear(); |
|
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1326 for (i = 0; i < length; i++) { |
|
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1327 temp_array->append(annotations->at(i)); |
|
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|
1328 } |
| 0 | 1329 |
| 1330 // Copy back using old method indices | |
| 1331 for (i = 0; i < length; i++) { | |
|
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1332 Method* m = methods->at(i); |
|
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1333 annotations->at_put(i, temp_array->at(m->method_idnum())); |
| 0 | 1334 } |
| 1335 } | |
| 1336 | |
| 3779 | 1337 // Comparer for sorting an object array containing |
|
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1338 // Method*s. |
|
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1339 static int method_comparator(Method* a, Method* b) { |
|
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1340 return a->name()->fast_compare(b->name()); |
|
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|
1341 } |
| 0 | 1342 |
| 1343 // This is only done during class loading, so it is OK to assume method_idnum matches the methods() array | |
|
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1344 void Method::sort_methods(Array<Method*>* methods, |
|
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1345 Array<AnnotationArray*>* methods_annotations, |
|
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1346 Array<AnnotationArray*>* methods_parameter_annotations, |
|
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1347 Array<AnnotationArray*>* methods_default_annotations, |
|
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|
1348 Array<AnnotationArray*>* methods_type_annotations, |
| 0 | 1349 bool idempotent) { |
| 1350 int length = methods->length(); | |
| 1351 if (length > 1) { | |
| 1352 bool do_annotations = false; | |
| 1353 if (methods_annotations != NULL || | |
| 1354 methods_parameter_annotations != NULL || | |
|
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1355 methods_default_annotations != NULL || |
|
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|
1356 methods_type_annotations != NULL) { |
| 0 | 1357 do_annotations = true; |
| 1358 } | |
| 1359 if (do_annotations) { | |
| 1360 // Remember current method ordering so we can reorder annotations | |
| 1361 for (int i = 0; i < length; i++) { | |
|
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1362 Method* m = methods->at(i); |
| 0 | 1363 m->set_method_idnum(i); |
| 1364 } | |
| 1365 } | |
| 3779 | 1366 { |
| 1367 No_Safepoint_Verifier nsv; | |
|
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1368 QuickSort::sort<Method*>(methods->data(), length, method_comparator, idempotent); |
| 0 | 1369 } |
| 1370 | |
| 1371 // Sort annotations if necessary | |
| 1372 assert(methods_annotations == NULL || methods_annotations->length() == methods->length(), ""); | |
| 1373 assert(methods_parameter_annotations == NULL || methods_parameter_annotations->length() == methods->length(), ""); | |
| 1374 assert(methods_default_annotations == NULL || methods_default_annotations->length() == methods->length(), ""); | |
|
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|
1375 assert(methods_type_annotations == NULL || methods_type_annotations->length() == methods->length(), ""); |
| 0 | 1376 if (do_annotations) { |
|
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|
1377 ResourceMark rm; |
| 0 | 1378 // Allocate temporary storage |
|
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1379 GrowableArray<AnnotationArray*>* temp_array = new GrowableArray<AnnotationArray*>(length); |
| 0 | 1380 reorder_based_on_method_index(methods, methods_annotations, temp_array); |
| 1381 reorder_based_on_method_index(methods, methods_parameter_annotations, temp_array); | |
| 1382 reorder_based_on_method_index(methods, methods_default_annotations, temp_array); | |
|
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1383 reorder_based_on_method_index(methods, methods_type_annotations, temp_array); |
| 0 | 1384 } |
| 1385 | |
| 1386 // Reset method ordering | |
| 1387 for (int i = 0; i < length; i++) { | |
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1388 Method* m = methods->at(i); |
| 0 | 1389 m->set_method_idnum(i); |
| 1390 } | |
| 1391 } | |
| 1392 } | |
| 1393 | |
| 1394 | |
| 1395 //----------------------------------------------------------------------------------- | |
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1396 // Non-product code unless JVM/TI needs it |
| 0 | 1397 |
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1398 #if !defined(PRODUCT) || INCLUDE_JVMTI |
| 0 | 1399 class SignatureTypePrinter : public SignatureTypeNames { |
| 1400 private: | |
| 1401 outputStream* _st; | |
| 1402 bool _use_separator; | |
| 1403 | |
| 1404 void type_name(const char* name) { | |
| 1405 if (_use_separator) _st->print(", "); | |
| 1406 _st->print(name); | |
| 1407 _use_separator = true; | |
| 1408 } | |
| 1409 | |
| 1410 public: | |
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1411 SignatureTypePrinter(Symbol* signature, outputStream* st) : SignatureTypeNames(signature) { |
| 0 | 1412 _st = st; |
| 1413 _use_separator = false; | |
| 1414 } | |
| 1415 | |
| 1416 void print_parameters() { _use_separator = false; iterate_parameters(); } | |
| 1417 void print_returntype() { _use_separator = false; iterate_returntype(); } | |
| 1418 }; | |
| 1419 | |
| 1420 | |
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1421 void Method::print_name(outputStream* st) { |
| 0 | 1422 Thread *thread = Thread::current(); |
| 1423 ResourceMark rm(thread); | |
| 1424 SignatureTypePrinter sig(signature(), st); | |
| 1425 st->print("%s ", is_static() ? "static" : "virtual"); | |
| 1426 sig.print_returntype(); | |
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1427 st->print(" %s.", method_holder()->internal_name()); |
| 0 | 1428 name()->print_symbol_on(st); |
| 1429 st->print("("); | |
| 1430 sig.print_parameters(); | |
| 1431 st->print(")"); | |
| 1432 } | |
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1433 #endif // !PRODUCT || INCLUDE_JVMTI |
| 0 | 1434 |
| 1435 | |
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1436 //----------------------------------------------------------------------------------- |
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1437 // Non-product code |
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1438 |
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1439 #ifndef PRODUCT |
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1440 void Method::print_codes_on(outputStream* st) const { |
| 0 | 1441 print_codes_on(0, code_size(), st); |
| 1442 } | |
| 1443 | |
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1444 void Method::print_codes_on(int from, int to, outputStream* st) const { |
| 0 | 1445 Thread *thread = Thread::current(); |
| 1446 ResourceMark rm(thread); | |
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1447 methodHandle mh (thread, (Method*)this); |
| 0 | 1448 BytecodeStream s(mh); |
| 1449 s.set_interval(from, to); | |
| 1450 BytecodeTracer::set_closure(BytecodeTracer::std_closure()); | |
| 1451 while (s.next() >= 0) BytecodeTracer::trace(mh, s.bcp(), st); | |
| 1452 } | |
| 1453 #endif // not PRODUCT | |
| 1454 | |
| 1455 | |
| 1456 // Simple compression of line number tables. We use a regular compressed stream, except that we compress deltas | |
| 1457 // between (bci,line) pairs since they are smaller. If (bci delta, line delta) fits in (5-bit unsigned, 3-bit unsigned) | |
| 1458 // we save it as one byte, otherwise we write a 0xFF escape character and use regular compression. 0x0 is used | |
| 1459 // as end-of-stream terminator. | |
| 1460 | |
| 1461 void CompressedLineNumberWriteStream::write_pair_regular(int bci_delta, int line_delta) { | |
| 1462 // bci and line number does not compress into single byte. | |
| 1463 // Write out escape character and use regular compression for bci and line number. | |
| 1464 write_byte((jubyte)0xFF); | |
| 1465 write_signed_int(bci_delta); | |
| 1466 write_signed_int(line_delta); | |
| 1467 } | |
| 1468 | |
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1469 // See comment in method.hpp which explains why this exists. |
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1470 #if defined(_M_AMD64) && _MSC_VER >= 1400 |
| 0 | 1471 #pragma optimize("", off) |
| 1472 void CompressedLineNumberWriteStream::write_pair(int bci, int line) { | |
| 1473 write_pair_inline(bci, line); | |
| 1474 } | |
| 1475 #pragma optimize("", on) | |
| 1476 #endif | |
| 1477 | |
| 1478 CompressedLineNumberReadStream::CompressedLineNumberReadStream(u_char* buffer) : CompressedReadStream(buffer) { | |
| 1479 _bci = 0; | |
| 1480 _line = 0; | |
| 1481 }; | |
| 1482 | |
| 1483 | |
| 1484 bool CompressedLineNumberReadStream::read_pair() { | |
| 1485 jubyte next = read_byte(); | |
| 1486 // Check for terminator | |
| 1487 if (next == 0) return false; | |
| 1488 if (next == 0xFF) { | |
| 1489 // Escape character, regular compression used | |
| 1490 _bci += read_signed_int(); | |
| 1491 _line += read_signed_int(); | |
| 1492 } else { | |
| 1493 // Single byte compression used | |
| 1494 _bci += next >> 3; | |
| 1495 _line += next & 0x7; | |
| 1496 } | |
| 1497 return true; | |
| 1498 } | |
| 1499 | |
| 1500 | |
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1501 Bytecodes::Code Method::orig_bytecode_at(int bci) const { |
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1502 BreakpointInfo* bp = method_holder()->breakpoints(); |
| 0 | 1503 for (; bp != NULL; bp = bp->next()) { |
| 1504 if (bp->match(this, bci)) { | |
| 1505 return bp->orig_bytecode(); | |
| 1506 } | |
| 1507 } | |
| 1508 ShouldNotReachHere(); | |
| 1509 return Bytecodes::_shouldnotreachhere; | |
| 1510 } | |
| 1511 | |
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1512 void Method::set_orig_bytecode_at(int bci, Bytecodes::Code code) { |
| 0 | 1513 assert(code != Bytecodes::_breakpoint, "cannot patch breakpoints this way"); |
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1514 BreakpointInfo* bp = method_holder()->breakpoints(); |
| 0 | 1515 for (; bp != NULL; bp = bp->next()) { |
| 1516 if (bp->match(this, bci)) { | |
| 1517 bp->set_orig_bytecode(code); | |
| 1518 // and continue, in case there is more than one | |
| 1519 } | |
| 1520 } | |
| 1521 } | |
| 1522 | |
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1523 void Method::set_breakpoint(int bci) { |
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1524 InstanceKlass* ik = method_holder(); |
| 0 | 1525 BreakpointInfo *bp = new BreakpointInfo(this, bci); |
| 1526 bp->set_next(ik->breakpoints()); | |
| 1527 ik->set_breakpoints(bp); | |
| 1528 // do this last: | |
| 1529 bp->set(this); | |
| 1530 } | |
| 1531 | |
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1532 static void clear_matches(Method* m, int bci) { |
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1533 InstanceKlass* ik = m->method_holder(); |
| 0 | 1534 BreakpointInfo* prev_bp = NULL; |
| 1535 BreakpointInfo* next_bp; | |
| 1536 for (BreakpointInfo* bp = ik->breakpoints(); bp != NULL; bp = next_bp) { | |
| 1537 next_bp = bp->next(); | |
| 1538 // bci value of -1 is used to delete all breakpoints in method m (ex: clear_all_breakpoint). | |
| 1539 if (bci >= 0 ? bp->match(m, bci) : bp->match(m)) { | |
| 1540 // do this first: | |
| 1541 bp->clear(m); | |
| 1542 // unhook it | |
| 1543 if (prev_bp != NULL) | |
| 1544 prev_bp->set_next(next_bp); | |
| 1545 else | |
| 1546 ik->set_breakpoints(next_bp); | |
| 1547 delete bp; | |
| 1548 // When class is redefined JVMTI sets breakpoint in all versions of EMCP methods | |
| 1549 // at same location. So we have multiple matching (method_index and bci) | |
| 1550 // BreakpointInfo nodes in BreakpointInfo list. We should just delete one | |
| 1551 // breakpoint for clear_breakpoint request and keep all other method versions | |
| 1552 // BreakpointInfo for future clear_breakpoint request. | |
| 1553 // bcivalue of -1 is used to clear all breakpoints (see clear_all_breakpoints) | |
| 1554 // which is being called when class is unloaded. We delete all the Breakpoint | |
| 1555 // information for all versions of method. We may not correctly restore the original | |
| 1556 // bytecode in all method versions, but that is ok. Because the class is being unloaded | |
| 1557 // so these methods won't be used anymore. | |
| 1558 if (bci >= 0) { | |
| 1559 break; | |
| 1560 } | |
| 1561 } else { | |
| 1562 // This one is a keeper. | |
| 1563 prev_bp = bp; | |
| 1564 } | |
| 1565 } | |
| 1566 } | |
| 1567 | |
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1568 void Method::clear_breakpoint(int bci) { |
| 0 | 1569 assert(bci >= 0, ""); |
| 1570 clear_matches(this, bci); | |
| 1571 } | |
| 1572 | |
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1573 void Method::clear_all_breakpoints() { |
| 0 | 1574 clear_matches(this, -1); |
| 1575 } | |
| 1576 | |
| 1577 | |
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1578 int Method::invocation_count() { |
| 1783 | 1579 if (TieredCompilation) { |
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1580 MethodData* const mdo = method_data(); |
| 1783 | 1581 if (invocation_counter()->carry() || ((mdo != NULL) ? mdo->invocation_counter()->carry() : false)) { |
| 1582 return InvocationCounter::count_limit; | |
| 1583 } else { | |
| 1584 return invocation_counter()->count() + ((mdo != NULL) ? mdo->invocation_counter()->count() : 0); | |
| 1585 } | |
| 1586 } else { | |
| 1587 return invocation_counter()->count(); | |
| 1588 } | |
| 1589 } | |
| 1590 | |
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1591 int Method::backedge_count() { |
| 1783 | 1592 if (TieredCompilation) { |
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1593 MethodData* const mdo = method_data(); |
| 1783 | 1594 if (backedge_counter()->carry() || ((mdo != NULL) ? mdo->backedge_counter()->carry() : false)) { |
| 1595 return InvocationCounter::count_limit; | |
| 1596 } else { | |
| 1597 return backedge_counter()->count() + ((mdo != NULL) ? mdo->backedge_counter()->count() : 0); | |
| 1598 } | |
| 1599 } else { | |
| 1600 return backedge_counter()->count(); | |
| 1601 } | |
| 1602 } | |
| 1603 | |
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1604 int Method::highest_comp_level() const { |
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1605 MethodData* mdo = method_data(); |
| 1783 | 1606 if (mdo != NULL) { |
| 1607 return mdo->highest_comp_level(); | |
| 1608 } else { | |
| 1609 return CompLevel_none; | |
| 1610 } | |
| 1611 } | |
| 1612 | |
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1613 int Method::highest_osr_comp_level() const { |
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1614 MethodData* mdo = method_data(); |
| 1783 | 1615 if (mdo != NULL) { |
| 1616 return mdo->highest_osr_comp_level(); | |
| 1617 } else { | |
| 1618 return CompLevel_none; | |
| 1619 } | |
| 1620 } | |
| 1621 | |
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1622 void Method::set_highest_comp_level(int level) { |
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1623 MethodData* mdo = method_data(); |
| 1783 | 1624 if (mdo != NULL) { |
| 1625 mdo->set_highest_comp_level(level); | |
| 1626 } | |
| 1627 } | |
| 1628 | |
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1629 void Method::set_highest_osr_comp_level(int level) { |
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1630 MethodData* mdo = method_data(); |
| 1783 | 1631 if (mdo != NULL) { |
| 1632 mdo->set_highest_osr_comp_level(level); | |
| 1633 } | |
| 1634 } | |
| 1635 | |
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1636 BreakpointInfo::BreakpointInfo(Method* m, int bci) { |
| 0 | 1637 _bci = bci; |
| 1638 _name_index = m->name_index(); | |
| 1639 _signature_index = m->signature_index(); | |
| 1640 _orig_bytecode = (Bytecodes::Code) *m->bcp_from(_bci); | |
| 1641 if (_orig_bytecode == Bytecodes::_breakpoint) | |
| 1642 _orig_bytecode = m->orig_bytecode_at(_bci); | |
| 1643 _next = NULL; | |
| 1644 } | |
| 1645 | |
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1646 void BreakpointInfo::set(Method* method) { |
| 0 | 1647 #ifdef ASSERT |
| 1648 { | |
| 1649 Bytecodes::Code code = (Bytecodes::Code) *method->bcp_from(_bci); | |
| 1650 if (code == Bytecodes::_breakpoint) | |
| 1651 code = method->orig_bytecode_at(_bci); | |
| 1652 assert(orig_bytecode() == code, "original bytecode must be the same"); | |
| 1653 } | |
| 1654 #endif | |
| 1655 *method->bcp_from(_bci) = Bytecodes::_breakpoint; | |
| 1656 method->incr_number_of_breakpoints(); | |
| 1657 SystemDictionary::notice_modification(); | |
| 1658 { | |
| 1659 // Deoptimize all dependents on this method | |
| 1660 Thread *thread = Thread::current(); | |
| 1661 HandleMark hm(thread); | |
| 1662 methodHandle mh(thread, method); | |
| 1663 Universe::flush_dependents_on_method(mh); | |
| 1664 } | |
| 1665 } | |
| 1666 | |
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1667 void BreakpointInfo::clear(Method* method) { |
| 0 | 1668 *method->bcp_from(_bci) = orig_bytecode(); |
| 1669 assert(method->number_of_breakpoints() > 0, "must not go negative"); | |
| 1670 method->decr_number_of_breakpoints(); | |
| 1671 } | |
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1672 |
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1673 // jmethodID handling |
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1674 |
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1675 // This is a block allocating object, sort of like JNIHandleBlock, only a |
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1676 // lot simpler. There aren't many of these, they aren't long, they are rarely |
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1677 // deleted and so we can do some suboptimal things. |
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1678 // It's allocated on the CHeap because once we allocate a jmethodID, we can |
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1679 // never get rid of it. |
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1680 // It would be nice to be able to parameterize the number of methods for |
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1681 // the null_class_loader but then we'd have to turn this and ClassLoaderData |
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1682 // into templates. |
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1683 |
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1684 // I feel like this brain dead class should exist somewhere in the STL |
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1685 |
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1686 class JNIMethodBlock : public CHeapObj<mtClass> { |
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1687 enum { number_of_methods = 8 }; |
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1688 |
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1689 Method* _methods[number_of_methods]; |
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1690 int _top; |
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1691 JNIMethodBlock* _next; |
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1692 public: |
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1693 static Method* const _free_method; |
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1694 |
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1695 JNIMethodBlock() : _next(NULL), _top(0) { |
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1696 for (int i = 0; i< number_of_methods; i++) _methods[i] = _free_method; |
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1697 } |
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1698 |
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1699 Method** add_method(Method* m) { |
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1700 if (_top < number_of_methods) { |
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1701 // top points to the next free entry. |
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1702 int i = _top; |
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1703 _methods[i] = m; |
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1704 _top++; |
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1705 return &_methods[i]; |
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1706 } else if (_top == number_of_methods) { |
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1707 // if the next free entry ran off the block see if there's a free entry |
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1708 for (int i = 0; i< number_of_methods; i++) { |
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1709 if (_methods[i] == _free_method) { |
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1710 _methods[i] = m; |
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1711 return &_methods[i]; |
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1712 } |
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1713 } |
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1714 // Only check each block once for frees. They're very unlikely. |
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1715 // Increment top past the end of the block. |
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1716 _top++; |
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1717 } |
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1718 // need to allocate a next block. |
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1719 if (_next == NULL) { |
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1720 _next = new JNIMethodBlock(); |
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1721 } |
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1722 return _next->add_method(m); |
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1723 } |
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1724 |
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1725 bool contains(Method** m) { |
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1726 for (JNIMethodBlock* b = this; b != NULL; b = b->_next) { |
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1727 for (int i = 0; i< number_of_methods; i++) { |
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1728 if (&(b->_methods[i]) == m) { |
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1729 return true; |
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1730 } |
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1731 } |
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1732 } |
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1733 return false; // not found |
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1734 } |
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1735 |
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1736 // Doesn't really destroy it, just marks it as free so it can be reused. |
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1737 void destroy_method(Method** m) { |
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1738 #ifdef ASSERT |
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1739 assert(contains(m), "should be a methodID"); |
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1740 #endif // ASSERT |
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1741 *m = _free_method; |
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1742 } |
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1743 |
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1744 // During class unloading the methods are cleared, which is different |
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1745 // than freed. |
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1746 void clear_all_methods() { |
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1747 for (JNIMethodBlock* b = this; b != NULL; b = b->_next) { |
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1748 for (int i = 0; i< number_of_methods; i++) { |
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1749 _methods[i] = NULL; |
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1750 } |
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1751 } |
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1752 } |
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1753 #ifndef PRODUCT |
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1754 int count_methods() { |
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1755 // count all allocated methods |
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1756 int count = 0; |
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1757 for (JNIMethodBlock* b = this; b != NULL; b = b->_next) { |
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1758 for (int i = 0; i< number_of_methods; i++) { |
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1759 if (_methods[i] != _free_method) count++; |
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1760 } |
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1761 } |
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1762 return count; |
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1763 } |
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1764 #endif // PRODUCT |
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1765 }; |
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1766 |
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1767 // Something that can't be mistaken for an address or a markOop |
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1768 Method* const JNIMethodBlock::_free_method = (Method*)55; |
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1769 |
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1770 // Add a method id to the jmethod_ids |
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1771 jmethodID Method::make_jmethod_id(ClassLoaderData* loader_data, Method* m) { |
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1772 ClassLoaderData* cld = loader_data; |
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1773 |
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1774 if (!SafepointSynchronize::is_at_safepoint()) { |
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1775 // Have to add jmethod_ids() to class loader data thread-safely. |
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1776 // Also have to add the method to the list safely, which the cld lock |
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1777 // protects as well. |
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1778 MutexLockerEx ml(cld->metaspace_lock(), Mutex::_no_safepoint_check_flag); |
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1779 if (cld->jmethod_ids() == NULL) { |
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1780 cld->set_jmethod_ids(new JNIMethodBlock()); |
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1781 } |
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1782 // jmethodID is a pointer to Method* |
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1783 return (jmethodID)cld->jmethod_ids()->add_method(m); |
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1784 } else { |
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1785 // At safepoint, we are single threaded and can set this. |
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1786 if (cld->jmethod_ids() == NULL) { |
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1787 cld->set_jmethod_ids(new JNIMethodBlock()); |
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1788 } |
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1789 // jmethodID is a pointer to Method* |
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1790 return (jmethodID)cld->jmethod_ids()->add_method(m); |
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1791 } |
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1792 } |
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1793 |
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1794 // Mark a jmethodID as free. This is called when there is a data race in |
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1795 // InstanceKlass while creating the jmethodID cache. |
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1796 void Method::destroy_jmethod_id(ClassLoaderData* loader_data, jmethodID m) { |
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1797 ClassLoaderData* cld = loader_data; |
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1798 Method** ptr = (Method**)m; |
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1799 assert(cld->jmethod_ids() != NULL, "should have method handles"); |
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1800 cld->jmethod_ids()->destroy_method(ptr); |
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1801 } |
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1802 |
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1803 void Method::change_method_associated_with_jmethod_id(jmethodID jmid, Method* new_method) { |
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1804 // Can't assert the method_holder is the same because the new method has the |
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1805 // scratch method holder. |
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1806 assert(resolve_jmethod_id(jmid)->method_holder()->class_loader() |
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1807 == new_method->method_holder()->class_loader(), |
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1808 "changing to a different class loader"); |
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1809 // Just change the method in place, jmethodID pointer doesn't change. |
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1810 *((Method**)jmid) = new_method; |
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1811 } |
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1812 |
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1813 bool Method::is_method_id(jmethodID mid) { |
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1814 Method* m = resolve_jmethod_id(mid); |
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1815 assert(m != NULL, "should be called with non-null method"); |
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1816 InstanceKlass* ik = m->method_holder(); |
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1817 ClassLoaderData* cld = ik->class_loader_data(); |
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1818 if (cld->jmethod_ids() == NULL) return false; |
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1819 return (cld->jmethod_ids()->contains((Method**)mid)); |
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1820 } |
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1821 |
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1822 Method* Method::checked_resolve_jmethod_id(jmethodID mid) { |
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1823 if (mid == NULL) return NULL; |
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1824 Method* o = resolve_jmethod_id(mid); |
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1825 if (o == NULL || o == JNIMethodBlock::_free_method || !((Metadata*)o)->is_method()) { |
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1826 return NULL; |
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1827 } |
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1828 return o; |
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1829 }; |
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1830 |
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1831 void Method::set_on_stack(const bool value) { |
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1832 // Set both the method itself and its constant pool. The constant pool |
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1833 // on stack means some method referring to it is also on the stack. |
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1834 _access_flags.set_on_stack(value); |
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1835 constants()->set_on_stack(value); |
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1836 if (value) MetadataOnStackMark::record(this); |
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1837 } |
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1838 |
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1839 // Called when the class loader is unloaded to make all methods weak. |
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1840 void Method::clear_jmethod_ids(ClassLoaderData* loader_data) { |
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1841 loader_data->jmethod_ids()->clear_all_methods(); |
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1842 } |
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1843 |
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1844 |
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1845 // Check that this pointer is valid by checking that the vtbl pointer matches |
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1846 bool Method::is_valid_method() const { |
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1847 if (this == NULL) { |
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1848 return false; |
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1849 } else if (!is_metaspace_object()) { |
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1850 return false; |
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1851 } else { |
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1852 Method m; |
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1853 // This assumes that the vtbl pointer is the first word of a C++ object. |
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1854 // This assumption is also in universe.cpp patch_klass_vtble |
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1855 void* vtbl2 = dereference_vptr((void*)&m); |
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1856 void* this_vtbl = dereference_vptr((void*)this); |
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1857 return vtbl2 == this_vtbl; |
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1858 } |
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1859 } |
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1860 |
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1861 #ifndef PRODUCT |
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1862 void Method::print_jmethod_ids(ClassLoaderData* loader_data, outputStream* out) { |
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1863 out->print_cr("jni_method_id count = %d", loader_data->jmethod_ids()->count_methods()); |
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1864 } |
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1865 #endif // PRODUCT |
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1866 |
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1867 |
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1868 // Printing |
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1869 |
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1870 #ifndef PRODUCT |
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1871 |
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1872 void Method::print_on(outputStream* st) const { |
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1873 ResourceMark rm; |
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1874 assert(is_method(), "must be method"); |
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1875 st->print_cr(internal_name()); |
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1876 // get the effect of PrintOopAddress, always, for methods: |
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1877 st->print_cr(" - this oop: "INTPTR_FORMAT, (intptr_t)this); |
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1878 st->print (" - method holder: "); method_holder()->print_value_on(st); st->cr(); |
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1879 st->print (" - constants: "INTPTR_FORMAT" ", (address)constants()); |
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1880 constants()->print_value_on(st); st->cr(); |
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1881 st->print (" - access: 0x%x ", access_flags().as_int()); access_flags().print_on(st); st->cr(); |
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1882 st->print (" - name: "); name()->print_value_on(st); st->cr(); |
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1883 st->print (" - signature: "); signature()->print_value_on(st); st->cr(); |
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1884 st->print_cr(" - max stack: %d", max_stack()); |
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1885 st->print_cr(" - max locals: %d", max_locals()); |
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1886 st->print_cr(" - size of params: %d", size_of_parameters()); |
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1887 st->print_cr(" - method size: %d", method_size()); |
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1888 if (intrinsic_id() != vmIntrinsics::_none) |
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1889 st->print_cr(" - intrinsic id: %d %s", intrinsic_id(), vmIntrinsics::name_at(intrinsic_id())); |
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1890 if (highest_comp_level() != CompLevel_none) |
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1891 st->print_cr(" - highest level: %d", highest_comp_level()); |
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1892 st->print_cr(" - vtable index: %d", _vtable_index); |
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1893 st->print_cr(" - i2i entry: " INTPTR_FORMAT, interpreter_entry()); |
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1894 st->print( " - adapters: "); |
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1895 AdapterHandlerEntry* a = ((Method*)this)->adapter(); |
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1896 if (a == NULL) |
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1897 st->print_cr(INTPTR_FORMAT, a); |
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1898 else |
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1899 a->print_adapter_on(st); |
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1900 st->print_cr(" - compiled entry " INTPTR_FORMAT, from_compiled_entry()); |
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1901 st->print_cr(" - code size: %d", code_size()); |
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1902 if (code_size() != 0) { |
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1903 st->print_cr(" - code start: " INTPTR_FORMAT, code_base()); |
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1904 st->print_cr(" - code end (excl): " INTPTR_FORMAT, code_base() + code_size()); |
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1905 } |
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1906 if (method_data() != NULL) { |
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1907 st->print_cr(" - method data: " INTPTR_FORMAT, (address)method_data()); |
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1908 } |
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1909 st->print_cr(" - checked ex length: %d", checked_exceptions_length()); |
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1910 if (checked_exceptions_length() > 0) { |
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1911 CheckedExceptionElement* table = checked_exceptions_start(); |
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1912 st->print_cr(" - checked ex start: " INTPTR_FORMAT, table); |
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1913 if (Verbose) { |
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1914 for (int i = 0; i < checked_exceptions_length(); i++) { |
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1915 st->print_cr(" - throws %s", constants()->printable_name_at(table[i].class_cp_index)); |
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1916 } |
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1917 } |
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1918 } |
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1919 if (has_linenumber_table()) { |
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1920 u_char* table = compressed_linenumber_table(); |
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1921 st->print_cr(" - linenumber start: " INTPTR_FORMAT, table); |
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1922 if (Verbose) { |
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1923 CompressedLineNumberReadStream stream(table); |
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1924 while (stream.read_pair()) { |
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1925 st->print_cr(" - line %d: %d", stream.line(), stream.bci()); |
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1926 } |
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1927 } |
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1928 } |
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1929 st->print_cr(" - localvar length: %d", localvariable_table_length()); |
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1930 if (localvariable_table_length() > 0) { |
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1931 LocalVariableTableElement* table = localvariable_table_start(); |
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1932 st->print_cr(" - localvar start: " INTPTR_FORMAT, table); |
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1933 if (Verbose) { |
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1934 for (int i = 0; i < localvariable_table_length(); i++) { |
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1935 int bci = table[i].start_bci; |
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1936 int len = table[i].length; |
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1937 const char* name = constants()->printable_name_at(table[i].name_cp_index); |
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1938 const char* desc = constants()->printable_name_at(table[i].descriptor_cp_index); |
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1939 int slot = table[i].slot; |
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1940 st->print_cr(" - %s %s bci=%d len=%d slot=%d", desc, name, bci, len, slot); |
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1941 } |
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1942 } |
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1943 } |
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1944 if (code() != NULL) { |
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1945 st->print (" - compiled code: "); |
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1946 code()->print_value_on(st); |
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1947 } |
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1948 if (is_native()) { |
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1949 st->print_cr(" - native function: " INTPTR_FORMAT, native_function()); |
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1950 st->print_cr(" - signature handler: " INTPTR_FORMAT, signature_handler()); |
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1951 } |
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1952 } |
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1953 |
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1954 #endif //PRODUCT |
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1955 |
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1956 void Method::print_value_on(outputStream* st) const { |
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1957 assert(is_method(), "must be method"); |
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1958 st->print_cr(internal_name()); |
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1959 print_address_on(st); |
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1960 st->print(" "); |
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1961 name()->print_value_on(st); |
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1962 st->print(" "); |
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1963 signature()->print_value_on(st); |
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1964 st->print(" in "); |
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1965 method_holder()->print_value_on(st); |
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1966 if (WizardMode) st->print("[%d,%d]", size_of_parameters(), max_locals()); |
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1967 if (WizardMode && code() != NULL) st->print(" ((nmethod*)%p)", code()); |
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1968 } |
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1969 |
| 7956 | 1970 #if INCLUDE_SERVICES |
| 1971 // Size Statistics | |
| 1972 void Method::collect_statistics(KlassSizeStats *sz) const { | |
| 1973 int mysize = sz->count(this); | |
| 1974 sz->_method_bytes += mysize; | |
| 1975 sz->_method_all_bytes += mysize; | |
| 1976 sz->_rw_bytes += mysize; | |
| 1977 | |
| 1978 if (constMethod()) { | |
| 1979 constMethod()->collect_statistics(sz); | |
| 1980 } | |
| 1981 if (method_data()) { | |
| 1982 method_data()->collect_statistics(sz); | |
| 1983 } | |
| 1984 } | |
| 1985 #endif // INCLUDE_SERVICES | |
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1986 |
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1987 // Verification |
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1988 |
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1989 void Method::verify_on(outputStream* st) { |
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1990 guarantee(is_method(), "object must be method"); |
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1991 guarantee(is_metadata(), "should be metadata"); |
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1992 guarantee(constants()->is_constantPool(), "should be constant pool"); |
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1993 guarantee(constants()->is_metadata(), "should be metadata"); |
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1994 guarantee(constMethod()->is_constMethod(), "should be ConstMethod*"); |
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1995 guarantee(constMethod()->is_metadata(), "should be metadata"); |
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1996 MethodData* md = method_data(); |
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1997 guarantee(md == NULL || |
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1998 md->is_metadata(), "should be metadata"); |
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1999 guarantee(md == NULL || |
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2000 md->is_methodData(), "should be method data"); |
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2001 } |