Mercurial > hg > truffle
annotate src/share/vm/oops/method.cpp @ 7184:5505fbbae3d3
Merge
| author | cjplummer |
|---|---|
| date | Thu, 29 Nov 2012 13:55:49 -0800 |
| parents | 59c790074993 b2dbd323c668 |
| children | 291ffc492eb6 35431a769282 0c8717a92b2d |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "classfile/systemDictionary.hpp" | |
| 27 #include "code/debugInfoRec.hpp" | |
| 28 #include "gc_interface/collectedHeap.inline.hpp" | |
| 29 #include "interpreter/bytecodeStream.hpp" | |
| 30 #include "interpreter/bytecodeTracer.hpp" | |
| 31 #include "interpreter/bytecodes.hpp" | |
| 32 #include "interpreter/interpreter.hpp" | |
| 33 #include "interpreter/oopMapCache.hpp" | |
| 34 #include "memory/gcLocker.hpp" | |
| 35 #include "memory/generation.hpp" | |
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36 #include "memory/metadataFactory.hpp" |
| 1972 | 37 #include "memory/oopFactory.hpp" |
| 6934 | 38 #include "oops/constMethod.hpp" |
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39 #include "oops/methodData.hpp" |
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40 #include "oops/method.hpp" |
| 1972 | 41 #include "oops/oop.inline.hpp" |
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42 #include "oops/symbol.hpp" |
| 1972 | 43 #include "prims/jvmtiExport.hpp" |
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44 #include "prims/jvmtiRedefineClasses.hpp" |
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45 #include "prims/methodHandles.hpp" |
| 1972 | 46 #include "prims/nativeLookup.hpp" |
| 47 #include "runtime/arguments.hpp" | |
| 48 #include "runtime/compilationPolicy.hpp" | |
| 49 #include "runtime/frame.inline.hpp" | |
| 50 #include "runtime/handles.inline.hpp" | |
| 51 #include "runtime/relocator.hpp" | |
| 52 #include "runtime/sharedRuntime.hpp" | |
| 53 #include "runtime/signature.hpp" | |
| 3779 | 54 #include "utilities/quickSort.hpp" |
| 1972 | 55 #include "utilities/xmlstream.hpp" |
| 0 | 56 |
| 57 | |
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58 // Implementation of Method |
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59 |
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60 Method* Method::allocate(ClassLoaderData* loader_data, |
| 6934 | 61 int byte_code_size, |
| 62 AccessFlags access_flags, | |
| 63 int compressed_line_number_size, | |
| 64 int localvariable_table_length, | |
| 65 int exception_table_length, | |
| 66 int checked_exceptions_length, | |
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67 u2 generic_signature_index, |
| 6934 | 68 ConstMethod::MethodType method_type, |
| 69 TRAPS) { | |
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70 assert(!access_flags.is_native() || byte_code_size == 0, |
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71 "native methods should not contain byte codes"); |
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72 ConstMethod* cm = ConstMethod::allocate(loader_data, |
| 6934 | 73 byte_code_size, |
| 74 compressed_line_number_size, | |
| 75 localvariable_table_length, | |
| 76 exception_table_length, | |
| 77 checked_exceptions_length, | |
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78 generic_signature_index, |
| 6934 | 79 method_type, |
| 80 CHECK_NULL); | |
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81 |
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82 int size = Method::size(access_flags.is_native()); |
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83 |
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84 return new (loader_data, size, false, THREAD) Method(cm, access_flags, size); |
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85 } |
| 0 | 86 |
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87 Method::Method(ConstMethod* xconst, |
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88 AccessFlags access_flags, int size) { |
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89 No_Safepoint_Verifier no_safepoint; |
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90 set_constMethod(xconst); |
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91 set_access_flags(access_flags); |
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92 set_method_size(size); |
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93 set_name_index(0); |
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94 set_signature_index(0); |
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95 #ifdef CC_INTERP |
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96 set_result_index(T_VOID); |
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97 #endif |
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98 set_constants(NULL); |
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99 set_max_stack(0); |
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100 set_max_locals(0); |
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101 set_intrinsic_id(vmIntrinsics::_none); |
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102 set_jfr_towrite(false); |
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103 set_method_data(NULL); |
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104 set_interpreter_throwout_count(0); |
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105 set_vtable_index(Method::garbage_vtable_index); |
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106 |
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107 // Fix and bury in Method* |
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108 set_interpreter_entry(NULL); // sets i2i entry and from_int |
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109 set_adapter_entry(NULL); |
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110 clear_code(); // from_c/from_i get set to c2i/i2i |
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111 |
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112 if (access_flags.is_native()) { |
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113 clear_native_function(); |
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114 set_signature_handler(NULL); |
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115 } |
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116 |
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117 NOT_PRODUCT(set_compiled_invocation_count(0);) |
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118 set_interpreter_invocation_count(0); |
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119 invocation_counter()->init(); |
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120 backedge_counter()->init(); |
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121 clear_number_of_breakpoints(); |
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122 |
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123 #ifdef TIERED |
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124 set_rate(0); |
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125 set_prev_event_count(0); |
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126 set_prev_time(0); |
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127 #endif |
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128 } |
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129 |
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130 // Release Method*. The nmethod will be gone when we get here because |
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131 // we've walked the code cache. |
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132 void Method::deallocate_contents(ClassLoaderData* loader_data) { |
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133 MetadataFactory::free_metadata(loader_data, constMethod()); |
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134 set_constMethod(NULL); |
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135 MetadataFactory::free_metadata(loader_data, method_data()); |
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136 set_method_data(NULL); |
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137 // The nmethod will be gone when we get here. |
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138 if (code() != NULL) _code = NULL; |
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139 } |
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140 |
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141 address Method::get_i2c_entry() { |
| 0 | 142 assert(_adapter != NULL, "must have"); |
| 143 return _adapter->get_i2c_entry(); | |
| 144 } | |
| 145 | |
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146 address Method::get_c2i_entry() { |
| 0 | 147 assert(_adapter != NULL, "must have"); |
| 148 return _adapter->get_c2i_entry(); | |
| 149 } | |
| 150 | |
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151 address Method::get_c2i_unverified_entry() { |
| 0 | 152 assert(_adapter != NULL, "must have"); |
| 153 return _adapter->get_c2i_unverified_entry(); | |
| 154 } | |
| 155 | |
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156 char* Method::name_and_sig_as_C_string() const { |
| 6983 | 157 return name_and_sig_as_C_string(constants()->pool_holder(), name(), signature()); |
| 0 | 158 } |
| 159 | |
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160 char* Method::name_and_sig_as_C_string(char* buf, int size) const { |
| 6983 | 161 return name_and_sig_as_C_string(constants()->pool_holder(), name(), signature(), buf, size); |
| 0 | 162 } |
| 163 | |
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164 char* Method::name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature) { |
| 0 | 165 const char* klass_name = klass->external_name(); |
| 166 int klass_name_len = (int)strlen(klass_name); | |
| 167 int method_name_len = method_name->utf8_length(); | |
| 168 int len = klass_name_len + 1 + method_name_len + signature->utf8_length(); | |
| 169 char* dest = NEW_RESOURCE_ARRAY(char, len + 1); | |
| 170 strcpy(dest, klass_name); | |
| 171 dest[klass_name_len] = '.'; | |
| 172 strcpy(&dest[klass_name_len + 1], method_name->as_C_string()); | |
| 173 strcpy(&dest[klass_name_len + 1 + method_name_len], signature->as_C_string()); | |
| 174 dest[len] = 0; | |
| 175 return dest; | |
| 176 } | |
| 177 | |
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178 char* Method::name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size) { |
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179 Symbol* klass_name = klass->name(); |
| 0 | 180 klass_name->as_klass_external_name(buf, size); |
| 181 int len = (int)strlen(buf); | |
| 182 | |
| 183 if (len < size - 1) { | |
| 184 buf[len++] = '.'; | |
| 185 | |
| 186 method_name->as_C_string(&(buf[len]), size - len); | |
| 187 len = (int)strlen(buf); | |
| 188 | |
| 189 signature->as_C_string(&(buf[len]), size - len); | |
| 190 } | |
| 191 | |
| 192 return buf; | |
| 193 } | |
| 194 | |
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195 int Method::fast_exception_handler_bci_for(KlassHandle ex_klass, int throw_bci, TRAPS) { |
| 0 | 196 // exception table holds quadruple entries of the form (beg_bci, end_bci, handler_bci, klass_index) |
| 197 // access exception table | |
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198 ExceptionTable table(this); |
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199 int length = table.length(); |
| 0 | 200 // iterate through all entries sequentially |
| 201 constantPoolHandle pool(THREAD, constants()); | |
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202 for (int i = 0; i < length; i ++) { |
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203 //reacquire the table in case a GC happened |
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204 ExceptionTable table(this); |
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205 int beg_bci = table.start_pc(i); |
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206 int end_bci = table.end_pc(i); |
| 0 | 207 assert(beg_bci <= end_bci, "inconsistent exception table"); |
| 208 if (beg_bci <= throw_bci && throw_bci < end_bci) { | |
| 209 // exception handler bci range covers throw_bci => investigate further | |
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210 int handler_bci = table.handler_pc(i); |
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211 int klass_index = table.catch_type_index(i); |
| 0 | 212 if (klass_index == 0) { |
| 213 return handler_bci; | |
| 214 } else if (ex_klass.is_null()) { | |
| 215 return handler_bci; | |
| 216 } else { | |
| 217 // we know the exception class => get the constraint class | |
| 218 // this may require loading of the constraint class; if verification | |
| 219 // fails or some other exception occurs, return handler_bci | |
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220 Klass* k = pool->klass_at(klass_index, CHECK_(handler_bci)); |
| 0 | 221 KlassHandle klass = KlassHandle(THREAD, k); |
| 222 assert(klass.not_null(), "klass not loaded"); | |
| 223 if (ex_klass->is_subtype_of(klass())) { | |
| 224 return handler_bci; | |
| 225 } | |
| 226 } | |
| 227 } | |
| 228 } | |
| 229 | |
| 230 return -1; | |
| 231 } | |
| 232 | |
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233 void Method::mask_for(int bci, InterpreterOopMap* mask) { |
| 0 | 234 |
| 235 Thread* myThread = Thread::current(); | |
| 236 methodHandle h_this(myThread, this); | |
| 237 #ifdef ASSERT | |
| 238 bool has_capability = myThread->is_VM_thread() || | |
| 239 myThread->is_ConcurrentGC_thread() || | |
| 240 myThread->is_GC_task_thread(); | |
| 241 | |
| 242 if (!has_capability) { | |
| 243 if (!VerifyStack && !VerifyLastFrame) { | |
| 244 // verify stack calls this outside VM thread | |
| 245 warning("oopmap should only be accessed by the " | |
| 246 "VM, GC task or CMS threads (or during debugging)"); | |
| 247 InterpreterOopMap local_mask; | |
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248 method_holder()->mask_for(h_this, bci, &local_mask); |
| 0 | 249 local_mask.print(); |
| 250 } | |
| 251 } | |
| 252 #endif | |
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253 method_holder()->mask_for(h_this, bci, mask); |
| 0 | 254 return; |
| 255 } | |
| 256 | |
| 257 | |
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258 int Method::bci_from(address bcp) const { |
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259 #ifdef ASSERT |
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260 { ResourceMark rm; |
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261 assert(is_native() && bcp == code_base() || contains(bcp) || is_error_reported(), |
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262 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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263 } |
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264 #endif |
| 0 | 265 return bcp - code_base(); |
| 266 } | |
| 267 | |
| 268 | |
| 269 // Return (int)bcx if it appears to be a valid BCI. | |
| 270 // Return bci_from((address)bcx) if it appears to be a valid BCP. | |
| 271 // Return -1 otherwise. | |
| 272 // Used by profiling code, when invalid data is a possibility. | |
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273 // The caller is responsible for validating the Method* itself. |
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274 int Method::validate_bci_from_bcx(intptr_t bcx) const { |
| 0 | 275 // keep bci as -1 if not a valid bci |
| 276 int bci = -1; | |
| 277 if (bcx == 0 || (address)bcx == code_base()) { | |
| 278 // code_size() may return 0 and we allow 0 here | |
| 279 // the method may be native | |
| 280 bci = 0; | |
| 281 } else if (frame::is_bci(bcx)) { | |
| 282 if (bcx < code_size()) { | |
| 283 bci = (int)bcx; | |
| 284 } | |
| 285 } else if (contains((address)bcx)) { | |
| 286 bci = (address)bcx - code_base(); | |
| 287 } | |
| 288 // Assert that if we have dodged any asserts, bci is negative. | |
| 289 assert(bci == -1 || bci == bci_from(bcp_from(bci)), "sane bci if >=0"); | |
| 290 return bci; | |
| 291 } | |
| 292 | |
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293 address Method::bcp_from(int bci) const { |
| 0 | 294 assert((is_native() && bci == 0) || (!is_native() && 0 <= bci && bci < code_size()), "illegal bci"); |
| 295 address bcp = code_base() + bci; | |
| 296 assert(is_native() && bcp == code_base() || contains(bcp), "bcp doesn't belong to this method"); | |
| 297 return bcp; | |
| 298 } | |
| 299 | |
| 300 | |
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301 int Method::size(bool is_native) { |
| 0 | 302 // If native, then include pointers for native_function and signature_handler |
| 303 int extra_bytes = (is_native) ? 2*sizeof(address*) : 0; | |
| 304 int extra_words = align_size_up(extra_bytes, BytesPerWord) / BytesPerWord; | |
| 305 return align_object_size(header_size() + extra_words); | |
| 306 } | |
| 307 | |
| 308 | |
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309 Symbol* Method::klass_name() const { |
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310 Klass* k = method_holder(); |
| 0 | 311 assert(k->is_klass(), "must be klass"); |
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312 InstanceKlass* ik = (InstanceKlass*) k; |
| 0 | 313 return ik->name(); |
| 314 } | |
| 315 | |
| 316 | |
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317 void Method::set_interpreter_kind() { |
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318 int kind = Interpreter::method_kind(this); |
| 0 | 319 assert(kind != Interpreter::invalid, |
| 320 "interpreter entry must be valid"); | |
| 321 set_interpreter_kind(kind); | |
| 322 } | |
| 323 | |
| 324 | |
| 325 // Attempt to return method oop to original state. Clear any pointers | |
| 326 // (to objects outside the shared spaces). We won't be able to predict | |
| 327 // where they should point in a new JVM. Further initialize some | |
| 328 // entries now in order allow them to be write protected later. | |
| 329 | |
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330 void Method::remove_unshareable_info() { |
| 0 | 331 unlink_method(); |
| 332 set_interpreter_kind(); | |
| 333 } | |
| 334 | |
| 335 | |
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336 bool Method::was_executed_more_than(int n) { |
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337 // Invocation counter is reset when the Method* is compiled. |
| 0 | 338 // If the method has compiled code we therefore assume it has |
| 339 // be excuted more than n times. | |
| 340 if (is_accessor() || is_empty_method() || (code() != NULL)) { | |
| 341 // interpreter doesn't bump invocation counter of trivial methods | |
| 342 // compiler does not bump invocation counter of compiled methods | |
| 343 return true; | |
| 1783 | 344 } |
| 345 else if (_invocation_counter.carry() || (method_data() != NULL && method_data()->invocation_counter()->carry())) { | |
| 0 | 346 // The carry bit is set when the counter overflows and causes |
| 347 // a compilation to occur. We don't know how many times | |
| 348 // the counter has been reset, so we simply assume it has | |
| 349 // been executed more than n times. | |
| 350 return true; | |
| 351 } else { | |
| 352 return invocation_count() > n; | |
| 353 } | |
| 354 } | |
| 355 | |
| 356 #ifndef PRODUCT | |
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357 void Method::print_invocation_count() { |
| 0 | 358 if (is_static()) tty->print("static "); |
| 359 if (is_final()) tty->print("final "); | |
| 360 if (is_synchronized()) tty->print("synchronized "); | |
| 361 if (is_native()) tty->print("native "); | |
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362 method_holder()->name()->print_symbol_on(tty); |
| 0 | 363 tty->print("."); |
| 364 name()->print_symbol_on(tty); | |
| 365 signature()->print_symbol_on(tty); | |
| 366 | |
| 367 if (WizardMode) { | |
| 368 // dump the size of the byte codes | |
| 369 tty->print(" {%d}", code_size()); | |
| 370 } | |
| 371 tty->cr(); | |
| 372 | |
| 373 tty->print_cr (" interpreter_invocation_count: %8d ", interpreter_invocation_count()); | |
| 374 tty->print_cr (" invocation_counter: %8d ", invocation_count()); | |
| 375 tty->print_cr (" backedge_counter: %8d ", backedge_count()); | |
| 376 if (CountCompiledCalls) { | |
| 377 tty->print_cr (" compiled_invocation_count: %8d ", compiled_invocation_count()); | |
| 378 } | |
| 379 | |
| 380 } | |
| 381 #endif | |
| 382 | |
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383 // Build a MethodData* object to hold information about this method |
| 0 | 384 // collected in the interpreter. |
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385 void Method::build_interpreter_method_data(methodHandle method, TRAPS) { |
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386 // Do not profile method if current thread holds the pending list lock, |
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387 // which avoids deadlock for acquiring the MethodData_lock. |
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388 if (InstanceRefKlass::owns_pending_list_lock((JavaThread*)THREAD)) { |
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389 return; |
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390 } |
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391 |
| 0 | 392 // Grab a lock here to prevent multiple |
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393 // MethodData*s from being created. |
| 0 | 394 MutexLocker ml(MethodData_lock, THREAD); |
| 395 if (method->method_data() == NULL) { | |
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396 ClassLoaderData* loader_data = method->method_holder()->class_loader_data(); |
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397 MethodData* method_data = MethodData::allocate(loader_data, method, CHECK); |
| 0 | 398 method->set_method_data(method_data); |
| 399 if (PrintMethodData && (Verbose || WizardMode)) { | |
| 400 ResourceMark rm(THREAD); | |
| 401 tty->print("build_interpreter_method_data for "); | |
| 402 method->print_name(tty); | |
| 403 tty->cr(); | |
| 404 // At the end of the run, the MDO, full of data, will be dumped. | |
| 405 } | |
| 406 } | |
| 407 } | |
| 408 | |
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409 void Method::cleanup_inline_caches() { |
| 0 | 410 // The current system doesn't use inline caches in the interpreter |
| 411 // => nothing to do (keep this method around for future use) | |
| 412 } | |
| 413 | |
| 414 | |
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415 int Method::extra_stack_words() { |
| 710 | 416 // not an inline function, to avoid a header dependency on Interpreter |
| 1506 | 417 return extra_stack_entries() * Interpreter::stackElementSize; |
| 710 | 418 } |
| 419 | |
| 420 | |
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421 void Method::compute_size_of_parameters(Thread *thread) { |
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422 ArgumentSizeComputer asc(signature()); |
| 0 | 423 set_size_of_parameters(asc.size() + (is_static() ? 0 : 1)); |
| 424 } | |
| 425 | |
| 426 #ifdef CC_INTERP | |
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427 void Method::set_result_index(BasicType type) { |
| 0 | 428 _result_index = Interpreter::BasicType_as_index(type); |
| 429 } | |
| 430 #endif | |
| 431 | |
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432 BasicType Method::result_type() const { |
| 0 | 433 ResultTypeFinder rtf(signature()); |
| 434 return rtf.type(); | |
| 435 } | |
| 436 | |
| 437 | |
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438 bool Method::is_empty_method() const { |
| 0 | 439 return code_size() == 1 |
| 440 && *code_base() == Bytecodes::_return; | |
| 441 } | |
| 442 | |
| 443 | |
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444 bool Method::is_vanilla_constructor() const { |
| 0 | 445 // Returns true if this method is a vanilla constructor, i.e. an "<init>" "()V" method |
| 446 // which only calls the superclass vanilla constructor and possibly does stores of | |
| 447 // zero constants to local fields: | |
| 448 // | |
| 449 // aload_0 | |
| 450 // invokespecial | |
| 451 // indexbyte1 | |
| 452 // indexbyte2 | |
| 453 // | |
| 454 // followed by an (optional) sequence of: | |
| 455 // | |
| 456 // aload_0 | |
| 457 // aconst_null / iconst_0 / fconst_0 / dconst_0 | |
| 458 // putfield | |
| 459 // indexbyte1 | |
| 460 // indexbyte2 | |
| 461 // | |
| 462 // followed by: | |
| 463 // | |
| 464 // return | |
| 465 | |
| 466 assert(name() == vmSymbols::object_initializer_name(), "Should only be called for default constructors"); | |
| 467 assert(signature() == vmSymbols::void_method_signature(), "Should only be called for default constructors"); | |
| 468 int size = code_size(); | |
| 469 // Check if size match | |
| 470 if (size == 0 || size % 5 != 0) return false; | |
| 471 address cb = code_base(); | |
| 472 int last = size - 1; | |
| 473 if (cb[0] != Bytecodes::_aload_0 || cb[1] != Bytecodes::_invokespecial || cb[last] != Bytecodes::_return) { | |
| 474 // Does not call superclass default constructor | |
| 475 return false; | |
| 476 } | |
| 477 // Check optional sequence | |
| 478 for (int i = 4; i < last; i += 5) { | |
| 479 if (cb[i] != Bytecodes::_aload_0) return false; | |
| 480 if (!Bytecodes::is_zero_const(Bytecodes::cast(cb[i+1]))) return false; | |
| 481 if (cb[i+2] != Bytecodes::_putfield) return false; | |
| 482 } | |
| 483 return true; | |
| 484 } | |
| 485 | |
| 486 | |
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487 bool Method::compute_has_loops_flag() { |
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488 BytecodeStream bcs(this); |
| 0 | 489 Bytecodes::Code bc; |
| 490 | |
| 491 while ((bc = bcs.next()) >= 0) { | |
| 492 switch( bc ) { | |
| 493 case Bytecodes::_ifeq: | |
| 494 case Bytecodes::_ifnull: | |
| 495 case Bytecodes::_iflt: | |
| 496 case Bytecodes::_ifle: | |
| 497 case Bytecodes::_ifne: | |
| 498 case Bytecodes::_ifnonnull: | |
| 499 case Bytecodes::_ifgt: | |
| 500 case Bytecodes::_ifge: | |
| 501 case Bytecodes::_if_icmpeq: | |
| 502 case Bytecodes::_if_icmpne: | |
| 503 case Bytecodes::_if_icmplt: | |
| 504 case Bytecodes::_if_icmpgt: | |
| 505 case Bytecodes::_if_icmple: | |
| 506 case Bytecodes::_if_icmpge: | |
| 507 case Bytecodes::_if_acmpeq: | |
| 508 case Bytecodes::_if_acmpne: | |
| 509 case Bytecodes::_goto: | |
| 510 case Bytecodes::_jsr: | |
| 511 if( bcs.dest() < bcs.next_bci() ) _access_flags.set_has_loops(); | |
| 512 break; | |
| 513 | |
| 514 case Bytecodes::_goto_w: | |
| 515 case Bytecodes::_jsr_w: | |
| 516 if( bcs.dest_w() < bcs.next_bci() ) _access_flags.set_has_loops(); | |
| 517 break; | |
| 518 } | |
| 519 } | |
| 520 _access_flags.set_loops_flag_init(); | |
| 521 return _access_flags.has_loops(); | |
| 522 } | |
| 523 | |
| 524 | |
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525 bool Method::is_final_method() const { |
| 0 | 526 // %%% Should return true for private methods also, |
| 527 // since there is no way to override them. | |
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528 return is_final() || method_holder()->is_final(); |
| 0 | 529 } |
| 530 | |
| 531 | |
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532 bool Method::is_strict_method() const { |
| 0 | 533 return is_strict(); |
| 534 } | |
| 535 | |
| 536 | |
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537 bool Method::can_be_statically_bound() const { |
| 0 | 538 if (is_final_method()) return true; |
| 539 return vtable_index() == nonvirtual_vtable_index; | |
| 540 } | |
| 541 | |
| 542 | |
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543 bool Method::is_accessor() const { |
| 0 | 544 if (code_size() != 5) return false; |
| 545 if (size_of_parameters() != 1) return false; | |
| 2142 | 546 if (java_code_at(0) != Bytecodes::_aload_0 ) return false; |
| 547 if (java_code_at(1) != Bytecodes::_getfield) return false; | |
| 548 if (java_code_at(4) != Bytecodes::_areturn && | |
| 549 java_code_at(4) != Bytecodes::_ireturn ) return false; | |
| 0 | 550 return true; |
| 551 } | |
| 552 | |
| 553 | |
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554 bool Method::is_initializer() const { |
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555 return name() == vmSymbols::object_initializer_name() || is_static_initializer(); |
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556 } |
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557 |
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558 bool Method::has_valid_initializer_flags() const { |
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559 return (is_static() || |
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560 method_holder()->major_version() < 51); |
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561 } |
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562 |
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563 bool Method::is_static_initializer() const { |
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564 // For classfiles version 51 or greater, ensure that the clinit method is |
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565 // static. Non-static methods with the name "<clinit>" are not static |
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566 // initializers. (older classfiles exempted for backward compatibility) |
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567 return name() == vmSymbols::class_initializer_name() && |
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568 has_valid_initializer_flags(); |
| 0 | 569 } |
| 570 | |
| 571 | |
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572 objArrayHandle Method::resolved_checked_exceptions_impl(Method* this_oop, TRAPS) { |
| 0 | 573 int length = this_oop->checked_exceptions_length(); |
| 574 if (length == 0) { // common case | |
| 575 return objArrayHandle(THREAD, Universe::the_empty_class_klass_array()); | |
| 576 } else { | |
| 577 methodHandle h_this(THREAD, this_oop); | |
| 1142 | 578 objArrayOop m_oop = oopFactory::new_objArray(SystemDictionary::Class_klass(), length, CHECK_(objArrayHandle())); |
| 0 | 579 objArrayHandle mirrors (THREAD, m_oop); |
| 580 for (int i = 0; i < length; i++) { | |
| 581 CheckedExceptionElement* table = h_this->checked_exceptions_start(); // recompute on each iteration, not gc safe | |
|
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582 Klass* k = h_this->constants()->klass_at(table[i].class_cp_index, CHECK_(objArrayHandle())); |
| 6983 | 583 assert(k->is_subclass_of(SystemDictionary::Throwable_klass()), "invalid exception class"); |
| 584 mirrors->obj_at_put(i, k->java_mirror()); | |
| 0 | 585 } |
| 586 return mirrors; | |
| 587 } | |
| 588 }; | |
| 589 | |
| 590 | |
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591 int Method::line_number_from_bci(int bci) const { |
| 0 | 592 if (bci == SynchronizationEntryBCI) bci = 0; |
| 593 assert(bci == 0 || 0 <= bci && bci < code_size(), "illegal bci"); | |
| 594 int best_bci = 0; | |
| 595 int best_line = -1; | |
| 596 | |
| 597 if (has_linenumber_table()) { | |
| 598 // The line numbers are a short array of 2-tuples [start_pc, line_number]. | |
| 599 // Not necessarily sorted and not necessarily one-to-one. | |
| 600 CompressedLineNumberReadStream stream(compressed_linenumber_table()); | |
| 601 while (stream.read_pair()) { | |
| 602 if (stream.bci() == bci) { | |
| 603 // perfect match | |
| 604 return stream.line(); | |
| 605 } else { | |
| 606 // update best_bci/line | |
| 607 if (stream.bci() < bci && stream.bci() >= best_bci) { | |
| 608 best_bci = stream.bci(); | |
| 609 best_line = stream.line(); | |
| 610 } | |
| 611 } | |
| 612 } | |
| 613 } | |
| 614 return best_line; | |
| 615 } | |
| 616 | |
| 617 | |
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618 bool Method::is_klass_loaded_by_klass_index(int klass_index) const { |
|
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619 if( constants()->tag_at(klass_index).is_unresolved_klass() ) { |
| 0 | 620 Thread *thread = Thread::current(); |
|
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621 Symbol* klass_name = constants()->klass_name_at(klass_index); |
|
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622 Handle loader(thread, method_holder()->class_loader()); |
| 6983 | 623 Handle prot (thread, method_holder()->protection_domain()); |
| 0 | 624 return SystemDictionary::find(klass_name, loader, prot, thread) != NULL; |
| 625 } else { | |
| 626 return true; | |
| 627 } | |
| 628 } | |
| 629 | |
| 630 | |
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631 bool Method::is_klass_loaded(int refinfo_index, bool must_be_resolved) const { |
|
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632 int klass_index = constants()->klass_ref_index_at(refinfo_index); |
| 0 | 633 if (must_be_resolved) { |
| 634 // Make sure klass is resolved in constantpool. | |
| 635 if (constants()->tag_at(klass_index).is_unresolved_klass()) return false; | |
| 636 } | |
| 637 return is_klass_loaded_by_klass_index(klass_index); | |
| 638 } | |
| 639 | |
| 640 | |
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641 void Method::set_native_function(address function, bool post_event_flag) { |
| 0 | 642 assert(function != NULL, "use clear_native_function to unregister natives"); |
|
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643 assert(!is_method_handle_intrinsic() || function == SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), ""); |
| 0 | 644 address* native_function = native_function_addr(); |
| 645 | |
| 646 // We can see racers trying to place the same native function into place. Once | |
| 647 // is plenty. | |
| 648 address current = *native_function; | |
| 649 if (current == function) return; | |
| 650 if (post_event_flag && JvmtiExport::should_post_native_method_bind() && | |
| 651 function != NULL) { | |
| 652 // native_method_throw_unsatisfied_link_error_entry() should only | |
| 653 // be passed when post_event_flag is false. | |
| 654 assert(function != | |
| 655 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
| 656 "post_event_flag mis-match"); | |
| 657 | |
| 658 // post the bind event, and possible change the bind function | |
| 659 JvmtiExport::post_native_method_bind(this, &function); | |
| 660 } | |
| 661 *native_function = function; | |
| 662 // This function can be called more than once. We must make sure that we always | |
| 663 // use the latest registered method -> check if a stub already has been generated. | |
| 664 // If so, we have to make it not_entrant. | |
| 665 nmethod* nm = code(); // Put it into local variable to guard against concurrent updates | |
| 666 if (nm != NULL) { | |
| 667 nm->make_not_entrant(); | |
| 668 } | |
| 669 } | |
| 670 | |
| 671 | |
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672 bool Method::has_native_function() const { |
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673 if (is_method_handle_intrinsic()) |
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674 return false; // special-cased in SharedRuntime::generate_native_wrapper |
| 0 | 675 address func = native_function(); |
| 676 return (func != NULL && func != SharedRuntime::native_method_throw_unsatisfied_link_error_entry()); | |
| 677 } | |
| 678 | |
| 679 | |
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680 void Method::clear_native_function() { |
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681 // Note: is_method_handle_intrinsic() is allowed here. |
| 0 | 682 set_native_function( |
| 683 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
| 684 !native_bind_event_is_interesting); | |
| 685 clear_code(); | |
| 686 } | |
| 687 | |
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688 address Method::critical_native_function() { |
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689 methodHandle mh(this); |
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690 return NativeLookup::lookup_critical_entry(mh); |
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691 } |
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692 |
| 0 | 693 |
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694 void Method::set_signature_handler(address handler) { |
| 0 | 695 address* signature_handler = signature_handler_addr(); |
| 696 *signature_handler = handler; | |
| 697 } | |
| 698 | |
| 699 | |
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700 void Method::print_made_not_compilable(int comp_level, bool is_osr, bool report) { |
|
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701 if (PrintCompilation && report) { |
|
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702 ttyLocker ttyl; |
|
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703 tty->print("made not %scompilable on ", is_osr ? "OSR " : ""); |
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704 if (comp_level == CompLevel_all) { |
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705 tty->print("all levels "); |
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706 } else { |
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707 tty->print("levels "); |
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708 for (int i = (int)CompLevel_none; i <= comp_level; i++) { |
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709 tty->print("%d ", i); |
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710 } |
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711 } |
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712 this->print_short_name(tty); |
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713 int size = this->code_size(); |
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714 if (size > 0) |
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715 tty->print(" (%d bytes)", size); |
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716 tty->cr(); |
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717 } |
| 0 | 718 if ((TraceDeoptimization || LogCompilation) && (xtty != NULL)) { |
| 719 ttyLocker ttyl; | |
| 6843 | 720 xtty->begin_elem("make_not_%scompilable thread='" UINTX_FORMAT "'", |
| 721 is_osr ? "osr_" : "", os::current_thread_id()); | |
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722 xtty->method(this); |
| 0 | 723 xtty->stamp(); |
| 724 xtty->end_elem(); | |
| 725 } | |
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726 } |
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727 |
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728 bool Method::is_not_compilable(int comp_level) const { |
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729 if (number_of_breakpoints() > 0) |
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730 return true; |
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731 if (is_method_handle_intrinsic()) |
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732 return !is_synthetic(); // the generated adapters must be compiled |
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733 if (comp_level == CompLevel_any) |
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734 return is_not_c1_compilable() || is_not_c2_compilable(); |
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735 if (is_c1_compile(comp_level)) |
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736 return is_not_c1_compilable(); |
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737 if (is_c2_compile(comp_level)) |
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738 return is_not_c2_compilable(); |
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739 return false; |
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740 } |
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741 |
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742 // call this when compiler finds that this method is not compilable |
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743 void Method::set_not_compilable(int comp_level, bool report) { |
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744 print_made_not_compilable(comp_level, /*is_osr*/ false, report); |
| 1783 | 745 if (comp_level == CompLevel_all) { |
| 746 set_not_c1_compilable(); | |
| 747 set_not_c2_compilable(); | |
| 748 } else { | |
|
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749 if (is_c1_compile(comp_level)) |
| 1783 | 750 set_not_c1_compilable(); |
|
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751 if (is_c2_compile(comp_level)) |
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752 set_not_c2_compilable(); |
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753 } |
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754 CompilationPolicy::policy()->disable_compilation(this); |
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755 } |
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|
756 |
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757 bool Method::is_not_osr_compilable(int comp_level) const { |
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758 if (is_not_compilable(comp_level)) |
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759 return true; |
|
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760 if (comp_level == CompLevel_any) |
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761 return is_not_c1_osr_compilable() || is_not_c2_osr_compilable(); |
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762 if (is_c1_compile(comp_level)) |
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763 return is_not_c1_osr_compilable(); |
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764 if (is_c2_compile(comp_level)) |
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765 return is_not_c2_osr_compilable(); |
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766 return false; |
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767 } |
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768 |
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769 void Method::set_not_osr_compilable(int comp_level, bool report) { |
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770 print_made_not_compilable(comp_level, /*is_osr*/ true, report); |
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771 if (comp_level == CompLevel_all) { |
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772 set_not_c1_osr_compilable(); |
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773 set_not_c2_osr_compilable(); |
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774 } else { |
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775 if (is_c1_compile(comp_level)) |
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776 set_not_c1_osr_compilable(); |
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777 if (is_c2_compile(comp_level)) |
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778 set_not_c2_osr_compilable(); |
| 0 | 779 } |
| 1783 | 780 CompilationPolicy::policy()->disable_compilation(this); |
| 0 | 781 } |
| 782 | |
| 783 // Revert to using the interpreter and clear out the nmethod | |
|
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784 void Method::clear_code() { |
| 0 | 785 |
| 786 // this may be NULL if c2i adapters have not been made yet | |
| 787 // Only should happen at allocate time. | |
| 788 if (_adapter == NULL) { | |
| 789 _from_compiled_entry = NULL; | |
| 790 } else { | |
| 791 _from_compiled_entry = _adapter->get_c2i_entry(); | |
| 792 } | |
| 793 OrderAccess::storestore(); | |
| 794 _from_interpreted_entry = _i2i_entry; | |
| 795 OrderAccess::storestore(); | |
| 796 _code = NULL; | |
| 797 } | |
| 798 | |
| 799 // Called by class data sharing to remove any entry points (which are not shared) | |
|
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800 void Method::unlink_method() { |
| 0 | 801 _code = NULL; |
| 802 _i2i_entry = NULL; | |
| 803 _from_interpreted_entry = NULL; | |
| 804 if (is_native()) { | |
| 805 *native_function_addr() = NULL; | |
| 806 set_signature_handler(NULL); | |
| 807 } | |
| 808 NOT_PRODUCT(set_compiled_invocation_count(0);) | |
| 809 invocation_counter()->reset(); | |
| 810 backedge_counter()->reset(); | |
| 811 _adapter = NULL; | |
| 812 _from_compiled_entry = NULL; | |
| 813 assert(_method_data == NULL, "unexpected method data?"); | |
| 814 set_method_data(NULL); | |
| 815 set_interpreter_throwout_count(0); | |
| 816 set_interpreter_invocation_count(0); | |
| 817 } | |
| 818 | |
| 819 // Called when the method_holder is getting linked. Setup entrypoints so the method | |
| 820 // is ready to be called from interpreter, compiler, and vtables. | |
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821 void Method::link_method(methodHandle h_method, TRAPS) { |
| 3748 | 822 // If the code cache is full, we may reenter this function for the |
| 823 // leftover methods that weren't linked. | |
| 824 if (_i2i_entry != NULL) return; | |
| 825 | |
| 0 | 826 assert(_adapter == NULL, "init'd to NULL" ); |
| 827 assert( _code == NULL, "nothing compiled yet" ); | |
| 828 | |
| 829 // Setup interpreter entrypoint | |
| 830 assert(this == h_method(), "wrong h_method()" ); | |
| 831 address entry = Interpreter::entry_for_method(h_method); | |
| 832 assert(entry != NULL, "interpreter entry must be non-null"); | |
| 833 // Sets both _i2i_entry and _from_interpreted_entry | |
| 834 set_interpreter_entry(entry); | |
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835 if (is_native() && !is_method_handle_intrinsic()) { |
| 0 | 836 set_native_function( |
| 837 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
| 838 !native_bind_event_is_interesting); | |
| 839 } | |
| 840 | |
| 841 // Setup compiler entrypoint. This is made eagerly, so we do not need | |
| 842 // special handling of vtables. An alternative is to make adapters more | |
| 843 // lazily by calling make_adapter() from from_compiled_entry() for the | |
| 844 // normal calls. For vtable calls life gets more complicated. When a | |
| 845 // call-site goes mega-morphic we need adapters in all methods which can be | |
| 846 // called from the vtable. We need adapters on such methods that get loaded | |
| 847 // later. Ditto for mega-morphic itable calls. If this proves to be a | |
| 848 // problem we'll make these lazily later. | |
|
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849 (void) make_adapters(h_method, CHECK); |
| 0 | 850 |
| 851 // ONLY USE the h_method now as make_adapter may have blocked | |
| 852 | |
| 853 } | |
| 854 | |
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855 address Method::make_adapters(methodHandle mh, TRAPS) { |
| 0 | 856 // Adapters for compiled code are made eagerly here. They are fairly |
| 857 // small (generally < 100 bytes) and quick to make (and cached and shared) | |
| 858 // so making them eagerly shouldn't be too expensive. | |
| 859 AdapterHandlerEntry* adapter = AdapterHandlerLibrary::get_adapter(mh); | |
| 860 if (adapter == NULL ) { | |
|
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861 THROW_MSG_NULL(vmSymbols::java_lang_VirtualMachineError(), "out of space in CodeCache for adapters"); |
| 0 | 862 } |
| 863 | |
| 864 mh->set_adapter_entry(adapter); | |
| 865 mh->_from_compiled_entry = adapter->get_c2i_entry(); | |
| 866 return adapter->get_c2i_entry(); | |
| 867 } | |
| 868 | |
| 869 // The verified_code_entry() must be called when a invoke is resolved | |
| 870 // on this method. | |
| 871 | |
| 872 // It returns the compiled code entry point, after asserting not null. | |
| 873 // This function is called after potential safepoints so that nmethod | |
| 874 // or adapter that it points to is still live and valid. | |
| 875 // This function must not hit a safepoint! | |
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876 address Method::verified_code_entry() { |
| 0 | 877 debug_only(No_Safepoint_Verifier nsv;) |
| 1202 | 878 nmethod *code = (nmethod *)OrderAccess::load_ptr_acquire(&_code); |
| 879 if (code == NULL && UseCodeCacheFlushing) { | |
| 880 nmethod *saved_code = CodeCache::find_and_remove_saved_code(this); | |
| 881 if (saved_code != NULL) { | |
| 882 methodHandle method(this); | |
| 883 assert( ! saved_code->is_osr_method(), "should not get here for osr" ); | |
| 884 set_code( method, saved_code ); | |
| 885 } | |
| 886 } | |
| 887 | |
| 0 | 888 assert(_from_compiled_entry != NULL, "must be set"); |
| 889 return _from_compiled_entry; | |
| 890 } | |
| 891 | |
| 892 // Check that if an nmethod ref exists, it has a backlink to this or no backlink at all | |
| 893 // (could be racing a deopt). | |
| 894 // Not inline to avoid circular ref. | |
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895 bool Method::check_code() const { |
| 0 | 896 // cached in a register or local. There's a race on the value of the field. |
| 897 nmethod *code = (nmethod *)OrderAccess::load_ptr_acquire(&_code); | |
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898 return code == NULL || (code->method() == NULL) || (code->method() == (Method*)this && !code->is_osr_method()); |
| 0 | 899 } |
| 900 | |
| 901 // Install compiled code. Instantly it can execute. | |
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902 void Method::set_code(methodHandle mh, nmethod *code) { |
| 0 | 903 assert( code, "use clear_code to remove code" ); |
| 904 assert( mh->check_code(), "" ); | |
| 905 | |
| 906 guarantee(mh->adapter() != NULL, "Adapter blob must already exist!"); | |
| 907 | |
| 908 // These writes must happen in this order, because the interpreter will | |
| 909 // directly jump to from_interpreted_entry which jumps to an i2c adapter | |
| 910 // which jumps to _from_compiled_entry. | |
| 911 mh->_code = code; // Assign before allowing compiled code to exec | |
| 912 | |
| 913 int comp_level = code->comp_level(); | |
| 914 // In theory there could be a race here. In practice it is unlikely | |
| 915 // and not worth worrying about. | |
| 1783 | 916 if (comp_level > mh->highest_comp_level()) { |
| 917 mh->set_highest_comp_level(comp_level); | |
| 0 | 918 } |
| 919 | |
| 920 OrderAccess::storestore(); | |
| 1692 | 921 #ifdef SHARK |
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922 mh->_from_interpreted_entry = code->insts_begin(); |
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923 #else //!SHARK |
| 0 | 924 mh->_from_compiled_entry = code->verified_entry_point(); |
| 925 OrderAccess::storestore(); | |
| 926 // Instantly compiled code can execute. | |
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927 if (!mh->is_method_handle_intrinsic()) |
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928 mh->_from_interpreted_entry = mh->get_i2c_entry(); |
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929 #endif //!SHARK |
| 0 | 930 } |
| 931 | |
| 932 | |
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933 bool Method::is_overridden_in(Klass* k) const { |
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934 InstanceKlass* ik = InstanceKlass::cast(k); |
| 0 | 935 |
| 936 if (ik->is_interface()) return false; | |
| 937 | |
| 938 // If method is an interface, we skip it - except if it | |
| 939 // is a miranda method | |
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940 if (method_holder()->is_interface()) { |
| 0 | 941 // Check that method is not a miranda method |
| 942 if (ik->lookup_method(name(), signature()) == NULL) { | |
| 943 // No implementation exist - so miranda method | |
| 944 return false; | |
| 945 } | |
| 946 return true; | |
| 947 } | |
| 948 | |
| 949 assert(ik->is_subclass_of(method_holder()), "should be subklass"); | |
| 950 assert(ik->vtable() != NULL, "vtable should exist"); | |
| 951 if (vtable_index() == nonvirtual_vtable_index) { | |
| 952 return false; | |
| 953 } else { | |
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954 Method* vt_m = ik->method_at_vtable(vtable_index()); |
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955 return vt_m != this; |
| 0 | 956 } |
| 957 } | |
| 958 | |
| 959 | |
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960 // give advice about whether this Method* should be cached or not |
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961 bool Method::should_not_be_cached() const { |
|
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962 if (is_old()) { |
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963 // This method has been redefined. It is either EMCP or obsolete |
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964 // and we don't want to cache it because that would pin the method |
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965 // down and prevent it from being collectible if and when it |
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966 // finishes executing. |
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967 return true; |
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968 } |
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969 |
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970 // caching this method should be just fine |
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971 return false; |
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972 } |
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973 |
| 710 | 974 // Constant pool structure for invoke methods: |
| 975 enum { | |
|
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976 _imcp_invoke_name = 1, // utf8: 'invokeExact', etc. |
|
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977 _imcp_invoke_signature, // utf8: (variable Symbol*) |
| 710 | 978 _imcp_limit |
| 979 }; | |
| 980 | |
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981 // Test if this method is an MH adapter frame generated by Java code. |
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982 // Cf. java/lang/invoke/InvokerBytecodeGenerator |
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983 bool Method::is_compiled_lambda_form() const { |
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984 return intrinsic_id() == vmIntrinsics::_compiledLambdaForm; |
| 710 | 985 } |
| 986 | |
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987 // Test if this method is an internal MH primitive method. |
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988 bool Method::is_method_handle_intrinsic() const { |
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989 vmIntrinsics::ID iid = intrinsic_id(); |
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990 return (MethodHandles::is_signature_polymorphic(iid) && |
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991 MethodHandles::is_signature_polymorphic_intrinsic(iid)); |
|
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992 } |
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993 |
|
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994 bool Method::has_member_arg() const { |
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995 vmIntrinsics::ID iid = intrinsic_id(); |
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996 return (MethodHandles::is_signature_polymorphic(iid) && |
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997 MethodHandles::has_member_arg(iid)); |
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998 } |
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999 |
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1000 // Make an instance of a signature-polymorphic internal MH primitive. |
|
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1001 methodHandle Method::make_method_handle_intrinsic(vmIntrinsics::ID iid, |
|
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1002 Symbol* signature, |
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1003 TRAPS) { |
|
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1004 ResourceMark rm; |
| 710 | 1005 methodHandle empty; |
| 1006 | |
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1007 KlassHandle holder = SystemDictionary::MethodHandle_klass(); |
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1008 Symbol* name = MethodHandles::signature_polymorphic_intrinsic_name(iid); |
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1009 assert(iid == MethodHandles::signature_polymorphic_name_id(name), ""); |
| 710 | 1010 if (TraceMethodHandles) { |
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1011 tty->print_cr("make_method_handle_intrinsic MH.%s%s", name->as_C_string(), signature->as_C_string()); |
| 710 | 1012 } |
| 1013 | |
|
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1014 // invariant: cp->symbol_at_put is preceded by a refcount increment (more usually a lookup) |
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1015 name->increment_refcount(); |
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1016 signature->increment_refcount(); |
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1017 |
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1018 int cp_length = _imcp_limit; |
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1019 ClassLoaderData* loader_data = holder->class_loader_data(); |
| 710 | 1020 constantPoolHandle cp; |
| 1021 { | |
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1022 ConstantPool* cp_oop = ConstantPool::allocate(loader_data, cp_length, CHECK_(empty)); |
| 710 | 1023 cp = constantPoolHandle(THREAD, cp_oop); |
| 1024 } | |
|
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1025 cp->set_pool_holder(InstanceKlass::cast(holder())); |
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1026 cp->symbol_at_put(_imcp_invoke_name, name); |
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1027 cp->symbol_at_put(_imcp_invoke_signature, signature); |
|
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1028 cp->set_preresolution(); |
| 710 | 1029 |
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1030 // decide on access bits: public or not? |
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1031 int flags_bits = (JVM_ACC_NATIVE | JVM_ACC_SYNTHETIC | JVM_ACC_FINAL); |
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1032 bool must_be_static = MethodHandles::is_signature_polymorphic_static(iid); |
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1033 if (must_be_static) flags_bits |= JVM_ACC_STATIC; |
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1034 assert((flags_bits & JVM_ACC_PUBLIC) == 0, "do not expose these methods"); |
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1035 |
| 710 | 1036 methodHandle m; |
| 1037 { | |
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1038 Method* m_oop = Method::allocate(loader_data, 0, accessFlags_from(flags_bits), |
|
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1039 0, 0, 0, 0, 0, ConstMethod::NORMAL, CHECK_(empty)); |
| 710 | 1040 m = methodHandle(THREAD, m_oop); |
| 1041 } | |
| 1042 m->set_constants(cp()); | |
| 1043 m->set_name_index(_imcp_invoke_name); | |
| 1044 m->set_signature_index(_imcp_invoke_signature); | |
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1045 assert(MethodHandles::is_signature_polymorphic_name(m->name()), ""); |
|
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1046 assert(m->signature() == signature, ""); |
| 710 | 1047 #ifdef CC_INTERP |
|
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1048 ResultTypeFinder rtf(signature); |
| 710 | 1049 m->set_result_index(rtf.type()); |
| 1050 #endif | |
| 1051 m->compute_size_of_parameters(THREAD); | |
|
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1052 m->init_intrinsic_id(); |
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1053 assert(m->is_method_handle_intrinsic(), ""); |
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1054 #ifdef ASSERT |
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1055 if (!MethodHandles::is_signature_polymorphic(m->intrinsic_id())) m->print(); |
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1056 assert(MethodHandles::is_signature_polymorphic(m->intrinsic_id()), "must be an invoker"); |
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1057 assert(m->intrinsic_id() == iid, "correctly predicted iid"); |
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1058 #endif //ASSERT |
| 710 | 1059 |
| 1060 // Finally, set up its entry points. | |
| 1061 assert(m->can_be_statically_bound(), ""); | |
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1062 m->set_vtable_index(Method::nonvirtual_vtable_index); |
| 710 | 1063 m->link_method(m, CHECK_(empty)); |
| 1064 | |
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1065 if (TraceMethodHandles && (Verbose || WizardMode)) |
| 710 | 1066 m->print_on(tty); |
| 1067 | |
| 1068 return m; | |
| 1069 } | |
| 1070 | |
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1071 Klass* Method::check_non_bcp_klass(Klass* klass) { |
| 6983 | 1072 if (klass != NULL && klass->class_loader() != NULL) { |
| 1073 if (klass->oop_is_objArray()) | |
|
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1074 klass = ObjArrayKlass::cast(klass)->bottom_klass(); |
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1075 return klass; |
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1076 } |
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1077 return NULL; |
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1078 } |
| 710 | 1079 |
|
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1080 |
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1081 methodHandle Method::clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length, |
| 0 | 1082 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS) { |
| 1083 // Code below does not work for native methods - they should never get rewritten anyway | |
| 1084 assert(!m->is_native(), "cannot rewrite native methods"); | |
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1085 // Allocate new Method* |
| 0 | 1086 AccessFlags flags = m->access_flags(); |
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1087 u2 generic_signature_index = m->generic_signature_index(); |
| 0 | 1088 int checked_exceptions_len = m->checked_exceptions_length(); |
| 1089 int localvariable_len = m->localvariable_table_length(); | |
|
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1090 int exception_table_len = m->exception_table_length(); |
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1091 |
| 6934 | 1092 ClassLoaderData* loader_data = m->method_holder()->class_loader_data(); |
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1093 Method* newm_oop = Method::allocate(loader_data, |
| 6934 | 1094 new_code_length, |
| 1095 flags, | |
| 1096 new_compressed_linenumber_size, | |
| 1097 localvariable_len, | |
| 1098 exception_table_len, | |
| 1099 checked_exceptions_len, | |
|
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1100 generic_signature_index, |
| 6934 | 1101 m->method_type(), |
| 1102 CHECK_(methodHandle())); | |
| 0 | 1103 methodHandle newm (THREAD, newm_oop); |
| 1104 int new_method_size = newm->method_size(); | |
|
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1105 |
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1106 // Create a shallow copy of Method part, but be careful to preserve the new ConstMethod* |
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1107 ConstMethod* newcm = newm->constMethod(); |
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1108 int new_const_method_size = newm->constMethod()->size(); |
|
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1109 |
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1110 memcpy(newm(), m(), sizeof(Method)); |
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1111 |
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1112 // Create shallow copy of ConstMethod. |
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1113 memcpy(newcm, m->constMethod(), sizeof(ConstMethod)); |
|
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1114 |
| 0 | 1115 // Reset correct method/const method, method size, and parameter info |
| 1116 newm->set_constMethod(newcm); | |
| 1117 newm->constMethod()->set_code_size(new_code_length); | |
| 1118 newm->constMethod()->set_constMethod_size(new_const_method_size); | |
| 1119 newm->set_method_size(new_method_size); | |
| 1120 assert(newm->code_size() == new_code_length, "check"); | |
| 1121 assert(newm->checked_exceptions_length() == checked_exceptions_len, "check"); | |
|
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1122 assert(newm->exception_table_length() == exception_table_len, "check"); |
| 0 | 1123 assert(newm->localvariable_table_length() == localvariable_len, "check"); |
| 1124 // Copy new byte codes | |
| 1125 memcpy(newm->code_base(), new_code, new_code_length); | |
| 1126 // Copy line number table | |
| 1127 if (new_compressed_linenumber_size > 0) { | |
| 1128 memcpy(newm->compressed_linenumber_table(), | |
| 1129 new_compressed_linenumber_table, | |
| 1130 new_compressed_linenumber_size); | |
| 1131 } | |
| 1132 // Copy checked_exceptions | |
| 1133 if (checked_exceptions_len > 0) { | |
| 1134 memcpy(newm->checked_exceptions_start(), | |
| 1135 m->checked_exceptions_start(), | |
| 1136 checked_exceptions_len * sizeof(CheckedExceptionElement)); | |
| 1137 } | |
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1138 // Copy exception table |
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1139 if (exception_table_len > 0) { |
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1140 memcpy(newm->exception_table_start(), |
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1141 m->exception_table_start(), |
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1142 exception_table_len * sizeof(ExceptionTableElement)); |
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1143 } |
| 0 | 1144 // Copy local variable number table |
| 1145 if (localvariable_len > 0) { | |
| 1146 memcpy(newm->localvariable_table_start(), | |
| 1147 m->localvariable_table_start(), | |
| 1148 localvariable_len * sizeof(LocalVariableTableElement)); | |
| 1149 } | |
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1150 // Copy stackmap table |
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1151 if (m->has_stackmap_table()) { |
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1152 int code_attribute_length = m->stackmap_data()->length(); |
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1153 Array<u1>* stackmap_data = |
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1154 MetadataFactory::new_array<u1>(loader_data, code_attribute_length, 0, CHECK_NULL); |
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1155 memcpy((void*)stackmap_data->adr_at(0), |
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1156 (void*)m->stackmap_data()->adr_at(0), code_attribute_length); |
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1157 newm->set_stackmap_data(stackmap_data); |
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1158 } |
|
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1159 |
| 0 | 1160 return newm; |
| 1161 } | |
| 1162 | |
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1163 vmSymbols::SID Method::klass_id_for_intrinsics(Klass* holder) { |
| 0 | 1164 // if loader is not the default loader (i.e., != NULL), we can't know the intrinsics |
| 1165 // because we are not loading from core libraries | |
| 6894 | 1166 // exception: the AES intrinsics come from lib/ext/sunjce_provider.jar |
| 1167 // which does not use the class default class loader so we check for its loader here | |
| 1168 if ((InstanceKlass::cast(holder)->class_loader() != NULL) && | |
| 1169 InstanceKlass::cast(holder)->class_loader()->klass()->name() != vmSymbols::sun_misc_Launcher_ExtClassLoader()) { | |
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1170 return vmSymbols::NO_SID; // regardless of name, no intrinsics here |
| 6894 | 1171 } |
| 0 | 1172 |
| 1173 // see if the klass name is well-known: | |
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1174 Symbol* klass_name = InstanceKlass::cast(holder)->name(); |
|
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1175 return vmSymbols::find_sid(klass_name); |
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1176 } |
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1177 |
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1178 void Method::init_intrinsic_id() { |
|
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1179 assert(_intrinsic_id == vmIntrinsics::_none, "do this just once"); |
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1180 const uintptr_t max_id_uint = right_n_bits((int)(sizeof(_intrinsic_id) * BitsPerByte)); |
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1181 assert((uintptr_t)vmIntrinsics::ID_LIMIT <= max_id_uint, "else fix size"); |
|
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1182 assert(intrinsic_id_size_in_bytes() == sizeof(_intrinsic_id), ""); |
|
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1183 |
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1184 // the klass name is well-known: |
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1185 vmSymbols::SID klass_id = klass_id_for_intrinsics(method_holder()); |
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1186 assert(klass_id != vmSymbols::NO_SID, "caller responsibility"); |
| 0 | 1187 |
| 1188 // ditto for method and signature: | |
| 1189 vmSymbols::SID name_id = vmSymbols::find_sid(name()); | |
|
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1190 if (klass_id != vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_MethodHandle) |
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1191 && name_id == vmSymbols::NO_SID) |
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1192 return; |
| 0 | 1193 vmSymbols::SID sig_id = vmSymbols::find_sid(signature()); |
|
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1194 if (klass_id != vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_MethodHandle) |
|
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1195 && sig_id == vmSymbols::NO_SID) return; |
| 0 | 1196 jshort flags = access_flags().as_short(); |
| 1197 | |
|
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1198 vmIntrinsics::ID id = vmIntrinsics::find_id(klass_id, name_id, sig_id, flags); |
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1199 if (id != vmIntrinsics::_none) { |
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1200 set_intrinsic_id(id); |
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1201 return; |
|
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1202 } |
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1203 |
| 0 | 1204 // A few slightly irregular cases: |
| 1205 switch (klass_id) { | |
| 1206 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_StrictMath): | |
| 1207 // Second chance: check in regular Math. | |
| 1208 switch (name_id) { | |
| 1209 case vmSymbols::VM_SYMBOL_ENUM_NAME(min_name): | |
| 1210 case vmSymbols::VM_SYMBOL_ENUM_NAME(max_name): | |
| 1211 case vmSymbols::VM_SYMBOL_ENUM_NAME(sqrt_name): | |
| 1212 // pretend it is the corresponding method in the non-strict class: | |
| 1213 klass_id = vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_Math); | |
|
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1214 id = vmIntrinsics::find_id(klass_id, name_id, sig_id, flags); |
| 0 | 1215 break; |
| 1216 } | |
|
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|
1217 break; |
|
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1218 |
|
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1219 // Signature-polymorphic methods: MethodHandle.invoke*, InvokeDynamic.*. |
|
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1220 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_MethodHandle): |
|
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1221 if (!is_native()) break; |
|
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1222 id = MethodHandles::signature_polymorphic_name_id(method_holder(), name()); |
|
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1223 if (is_static() != MethodHandles::is_signature_polymorphic_static(id)) |
|
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1224 id = vmIntrinsics::_none; |
|
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1225 break; |
| 0 | 1226 } |
| 1227 | |
|
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1228 if (id != vmIntrinsics::_none) { |
|
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1229 // Set up its iid. It is an alias method. |
|
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1230 set_intrinsic_id(id); |
|
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1231 return; |
|
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|
1232 } |
| 0 | 1233 } |
| 1234 | |
|
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1235 // These two methods are static since a GC may move the Method |
|
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1236 bool Method::load_signature_classes(methodHandle m, TRAPS) { |
|
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1237 if (THREAD->is_Compiler_thread()) { |
|
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1238 // There is nothing useful this routine can do from within the Compile thread. |
|
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1239 // Hopefully, the signature contains only well-known classes. |
|
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1240 // We could scan for this and return true/false, but the caller won't care. |
|
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1241 return false; |
|
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1242 } |
| 0 | 1243 bool sig_is_loaded = true; |
|
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1244 Handle class_loader(THREAD, m->method_holder()->class_loader()); |
|
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1245 Handle protection_domain(THREAD, m->method_holder()->protection_domain()); |
|
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1246 ResourceMark rm(THREAD); |
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1247 Symbol* signature = m->signature(); |
| 0 | 1248 for(SignatureStream ss(signature); !ss.is_done(); ss.next()) { |
| 1249 if (ss.is_object()) { | |
|
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1250 Symbol* sym = ss.as_symbol(CHECK_(false)); |
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1251 Symbol* name = sym; |
|
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1252 Klass* klass = SystemDictionary::resolve_or_null(name, class_loader, |
| 0 | 1253 protection_domain, THREAD); |
|
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1254 // We are loading classes eagerly. If a ClassNotFoundException or |
|
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|
1255 // a LinkageError was generated, be sure to ignore it. |
| 0 | 1256 if (HAS_PENDING_EXCEPTION) { |
| 1142 | 1257 if (PENDING_EXCEPTION->is_a(SystemDictionary::ClassNotFoundException_klass()) || |
| 1258 PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) { | |
| 0 | 1259 CLEAR_PENDING_EXCEPTION; |
| 1260 } else { | |
| 1261 return false; | |
| 1262 } | |
| 1263 } | |
| 1264 if( klass == NULL) { sig_is_loaded = false; } | |
| 1265 } | |
| 1266 } | |
| 1267 return sig_is_loaded; | |
| 1268 } | |
| 1269 | |
|
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1270 bool Method::has_unloaded_classes_in_signature(methodHandle m, TRAPS) { |
|
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1271 Handle class_loader(THREAD, m->method_holder()->class_loader()); |
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1272 Handle protection_domain(THREAD, m->method_holder()->protection_domain()); |
|
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1273 ResourceMark rm(THREAD); |
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1274 Symbol* signature = m->signature(); |
| 0 | 1275 for(SignatureStream ss(signature); !ss.is_done(); ss.next()) { |
| 1276 if (ss.type() == T_OBJECT) { | |
|
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1277 Symbol* name = ss.as_symbol_or_null(); |
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1278 if (name == NULL) return true; |
|
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1279 Klass* klass = SystemDictionary::find(name, class_loader, protection_domain, THREAD); |
| 0 | 1280 if (klass == NULL) return true; |
| 1281 } | |
| 1282 } | |
| 1283 return false; | |
| 1284 } | |
| 1285 | |
| 1286 // Exposed so field engineers can debug VM | |
|
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1287 void Method::print_short_name(outputStream* st) { |
| 0 | 1288 ResourceMark rm; |
| 1289 #ifdef PRODUCT | |
|
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1290 st->print(" %s::", method_holder()->external_name()); |
| 0 | 1291 #else |
|
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1292 st->print(" %s::", method_holder()->internal_name()); |
| 0 | 1293 #endif |
| 1294 name()->print_symbol_on(st); | |
| 1295 if (WizardMode) signature()->print_symbol_on(st); | |
|
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1296 else if (MethodHandles::is_signature_polymorphic(intrinsic_id())) |
|
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1297 MethodHandles::print_as_basic_type_signature_on(st, signature(), true); |
| 0 | 1298 } |
| 1299 | |
| 1300 // This is only done during class loading, so it is OK to assume method_idnum matches the methods() array | |
|
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1301 static void reorder_based_on_method_index(Array<Method*>* methods, |
|
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1302 Array<AnnotationArray*>* annotations, |
|
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1303 GrowableArray<AnnotationArray*>* temp_array) { |
| 0 | 1304 if (annotations == NULL) { |
| 1305 return; | |
| 1306 } | |
| 1307 | |
| 1308 int length = methods->length(); | |
| 1309 int i; | |
| 1310 // Copy to temp array | |
|
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1311 temp_array->clear(); |
|
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1312 for (i = 0; i < length; i++) { |
|
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1313 temp_array->append(annotations->at(i)); |
|
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1314 } |
| 0 | 1315 |
| 1316 // Copy back using old method indices | |
| 1317 for (i = 0; i < length; i++) { | |
|
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1318 Method* m = methods->at(i); |
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1319 annotations->at_put(i, temp_array->at(m->method_idnum())); |
| 0 | 1320 } |
| 1321 } | |
| 1322 | |
| 3779 | 1323 // Comparer for sorting an object array containing |
|
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1324 // Method*s. |
|
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1325 static int method_comparator(Method* a, Method* b) { |
|
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1326 return a->name()->fast_compare(b->name()); |
|
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1327 } |
| 0 | 1328 |
| 1329 // This is only done during class loading, so it is OK to assume method_idnum matches the methods() array | |
|
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1330 void Method::sort_methods(Array<Method*>* methods, |
|
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1331 Array<AnnotationArray*>* methods_annotations, |
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1332 Array<AnnotationArray*>* methods_parameter_annotations, |
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1333 Array<AnnotationArray*>* methods_default_annotations, |
| 0 | 1334 bool idempotent) { |
| 1335 int length = methods->length(); | |
| 1336 if (length > 1) { | |
| 1337 bool do_annotations = false; | |
| 1338 if (methods_annotations != NULL || | |
| 1339 methods_parameter_annotations != NULL || | |
| 1340 methods_default_annotations != NULL) { | |
| 1341 do_annotations = true; | |
| 1342 } | |
| 1343 if (do_annotations) { | |
| 1344 // Remember current method ordering so we can reorder annotations | |
| 1345 for (int i = 0; i < length; i++) { | |
|
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1346 Method* m = methods->at(i); |
| 0 | 1347 m->set_method_idnum(i); |
| 1348 } | |
| 1349 } | |
| 3779 | 1350 { |
| 1351 No_Safepoint_Verifier nsv; | |
|
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1352 QuickSort::sort<Method*>(methods->data(), length, method_comparator, idempotent); |
| 0 | 1353 } |
| 1354 | |
| 1355 // Sort annotations if necessary | |
| 1356 assert(methods_annotations == NULL || methods_annotations->length() == methods->length(), ""); | |
| 1357 assert(methods_parameter_annotations == NULL || methods_parameter_annotations->length() == methods->length(), ""); | |
| 1358 assert(methods_default_annotations == NULL || methods_default_annotations->length() == methods->length(), ""); | |
| 1359 if (do_annotations) { | |
|
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1360 ResourceMark rm; |
| 0 | 1361 // Allocate temporary storage |
|
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1362 GrowableArray<AnnotationArray*>* temp_array = new GrowableArray<AnnotationArray*>(length); |
| 0 | 1363 reorder_based_on_method_index(methods, methods_annotations, temp_array); |
| 1364 reorder_based_on_method_index(methods, methods_parameter_annotations, temp_array); | |
| 1365 reorder_based_on_method_index(methods, methods_default_annotations, temp_array); | |
| 1366 } | |
| 1367 | |
| 1368 // Reset method ordering | |
| 1369 for (int i = 0; i < length; i++) { | |
|
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1370 Method* m = methods->at(i); |
| 0 | 1371 m->set_method_idnum(i); |
| 1372 } | |
| 1373 } | |
| 1374 } | |
| 1375 | |
| 1376 | |
| 1377 //----------------------------------------------------------------------------------- | |
| 1378 // Non-product code | |
| 1379 | |
| 1380 #ifndef PRODUCT | |
| 1381 class SignatureTypePrinter : public SignatureTypeNames { | |
| 1382 private: | |
| 1383 outputStream* _st; | |
| 1384 bool _use_separator; | |
| 1385 | |
| 1386 void type_name(const char* name) { | |
| 1387 if (_use_separator) _st->print(", "); | |
| 1388 _st->print(name); | |
| 1389 _use_separator = true; | |
| 1390 } | |
| 1391 | |
| 1392 public: | |
|
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1393 SignatureTypePrinter(Symbol* signature, outputStream* st) : SignatureTypeNames(signature) { |
| 0 | 1394 _st = st; |
| 1395 _use_separator = false; | |
| 1396 } | |
| 1397 | |
| 1398 void print_parameters() { _use_separator = false; iterate_parameters(); } | |
| 1399 void print_returntype() { _use_separator = false; iterate_returntype(); } | |
| 1400 }; | |
| 1401 | |
| 1402 | |
|
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1403 void Method::print_name(outputStream* st) { |
| 0 | 1404 Thread *thread = Thread::current(); |
| 1405 ResourceMark rm(thread); | |
| 1406 SignatureTypePrinter sig(signature(), st); | |
| 1407 st->print("%s ", is_static() ? "static" : "virtual"); | |
| 1408 sig.print_returntype(); | |
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1409 st->print(" %s.", method_holder()->internal_name()); |
| 0 | 1410 name()->print_symbol_on(st); |
| 1411 st->print("("); | |
| 1412 sig.print_parameters(); | |
| 1413 st->print(")"); | |
| 1414 } | |
| 1415 | |
| 1416 | |
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1417 void Method::print_codes_on(outputStream* st) const { |
| 0 | 1418 print_codes_on(0, code_size(), st); |
| 1419 } | |
| 1420 | |
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1421 void Method::print_codes_on(int from, int to, outputStream* st) const { |
| 0 | 1422 Thread *thread = Thread::current(); |
| 1423 ResourceMark rm(thread); | |
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1424 methodHandle mh (thread, (Method*)this); |
| 0 | 1425 BytecodeStream s(mh); |
| 1426 s.set_interval(from, to); | |
| 1427 BytecodeTracer::set_closure(BytecodeTracer::std_closure()); | |
| 1428 while (s.next() >= 0) BytecodeTracer::trace(mh, s.bcp(), st); | |
| 1429 } | |
| 1430 #endif // not PRODUCT | |
| 1431 | |
| 1432 | |
| 1433 // Simple compression of line number tables. We use a regular compressed stream, except that we compress deltas | |
| 1434 // between (bci,line) pairs since they are smaller. If (bci delta, line delta) fits in (5-bit unsigned, 3-bit unsigned) | |
| 1435 // we save it as one byte, otherwise we write a 0xFF escape character and use regular compression. 0x0 is used | |
| 1436 // as end-of-stream terminator. | |
| 1437 | |
| 1438 void CompressedLineNumberWriteStream::write_pair_regular(int bci_delta, int line_delta) { | |
| 1439 // bci and line number does not compress into single byte. | |
| 1440 // Write out escape character and use regular compression for bci and line number. | |
| 1441 write_byte((jubyte)0xFF); | |
| 1442 write_signed_int(bci_delta); | |
| 1443 write_signed_int(line_delta); | |
| 1444 } | |
| 1445 | |
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1446 // See comment in method.hpp which explains why this exists. |
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1447 #if defined(_M_AMD64) && _MSC_VER >= 1400 |
| 0 | 1448 #pragma optimize("", off) |
| 1449 void CompressedLineNumberWriteStream::write_pair(int bci, int line) { | |
| 1450 write_pair_inline(bci, line); | |
| 1451 } | |
| 1452 #pragma optimize("", on) | |
| 1453 #endif | |
| 1454 | |
| 1455 CompressedLineNumberReadStream::CompressedLineNumberReadStream(u_char* buffer) : CompressedReadStream(buffer) { | |
| 1456 _bci = 0; | |
| 1457 _line = 0; | |
| 1458 }; | |
| 1459 | |
| 1460 | |
| 1461 bool CompressedLineNumberReadStream::read_pair() { | |
| 1462 jubyte next = read_byte(); | |
| 1463 // Check for terminator | |
| 1464 if (next == 0) return false; | |
| 1465 if (next == 0xFF) { | |
| 1466 // Escape character, regular compression used | |
| 1467 _bci += read_signed_int(); | |
| 1468 _line += read_signed_int(); | |
| 1469 } else { | |
| 1470 // Single byte compression used | |
| 1471 _bci += next >> 3; | |
| 1472 _line += next & 0x7; | |
| 1473 } | |
| 1474 return true; | |
| 1475 } | |
| 1476 | |
| 1477 | |
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1478 Bytecodes::Code Method::orig_bytecode_at(int bci) const { |
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1479 BreakpointInfo* bp = method_holder()->breakpoints(); |
| 0 | 1480 for (; bp != NULL; bp = bp->next()) { |
| 1481 if (bp->match(this, bci)) { | |
| 1482 return bp->orig_bytecode(); | |
| 1483 } | |
| 1484 } | |
| 1485 ShouldNotReachHere(); | |
| 1486 return Bytecodes::_shouldnotreachhere; | |
| 1487 } | |
| 1488 | |
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1489 void Method::set_orig_bytecode_at(int bci, Bytecodes::Code code) { |
| 0 | 1490 assert(code != Bytecodes::_breakpoint, "cannot patch breakpoints this way"); |
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1491 BreakpointInfo* bp = method_holder()->breakpoints(); |
| 0 | 1492 for (; bp != NULL; bp = bp->next()) { |
| 1493 if (bp->match(this, bci)) { | |
| 1494 bp->set_orig_bytecode(code); | |
| 1495 // and continue, in case there is more than one | |
| 1496 } | |
| 1497 } | |
| 1498 } | |
| 1499 | |
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1500 void Method::set_breakpoint(int bci) { |
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1501 InstanceKlass* ik = method_holder(); |
| 0 | 1502 BreakpointInfo *bp = new BreakpointInfo(this, bci); |
| 1503 bp->set_next(ik->breakpoints()); | |
| 1504 ik->set_breakpoints(bp); | |
| 1505 // do this last: | |
| 1506 bp->set(this); | |
| 1507 } | |
| 1508 | |
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1509 static void clear_matches(Method* m, int bci) { |
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1510 InstanceKlass* ik = m->method_holder(); |
| 0 | 1511 BreakpointInfo* prev_bp = NULL; |
| 1512 BreakpointInfo* next_bp; | |
| 1513 for (BreakpointInfo* bp = ik->breakpoints(); bp != NULL; bp = next_bp) { | |
| 1514 next_bp = bp->next(); | |
| 1515 // bci value of -1 is used to delete all breakpoints in method m (ex: clear_all_breakpoint). | |
| 1516 if (bci >= 0 ? bp->match(m, bci) : bp->match(m)) { | |
| 1517 // do this first: | |
| 1518 bp->clear(m); | |
| 1519 // unhook it | |
| 1520 if (prev_bp != NULL) | |
| 1521 prev_bp->set_next(next_bp); | |
| 1522 else | |
| 1523 ik->set_breakpoints(next_bp); | |
| 1524 delete bp; | |
| 1525 // When class is redefined JVMTI sets breakpoint in all versions of EMCP methods | |
| 1526 // at same location. So we have multiple matching (method_index and bci) | |
| 1527 // BreakpointInfo nodes in BreakpointInfo list. We should just delete one | |
| 1528 // breakpoint for clear_breakpoint request and keep all other method versions | |
| 1529 // BreakpointInfo for future clear_breakpoint request. | |
| 1530 // bcivalue of -1 is used to clear all breakpoints (see clear_all_breakpoints) | |
| 1531 // which is being called when class is unloaded. We delete all the Breakpoint | |
| 1532 // information for all versions of method. We may not correctly restore the original | |
| 1533 // bytecode in all method versions, but that is ok. Because the class is being unloaded | |
| 1534 // so these methods won't be used anymore. | |
| 1535 if (bci >= 0) { | |
| 1536 break; | |
| 1537 } | |
| 1538 } else { | |
| 1539 // This one is a keeper. | |
| 1540 prev_bp = bp; | |
| 1541 } | |
| 1542 } | |
| 1543 } | |
| 1544 | |
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1545 void Method::clear_breakpoint(int bci) { |
| 0 | 1546 assert(bci >= 0, ""); |
| 1547 clear_matches(this, bci); | |
| 1548 } | |
| 1549 | |
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1550 void Method::clear_all_breakpoints() { |
| 0 | 1551 clear_matches(this, -1); |
| 1552 } | |
| 1553 | |
| 1554 | |
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1555 int Method::invocation_count() { |
| 1783 | 1556 if (TieredCompilation) { |
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1557 MethodData* const mdo = method_data(); |
| 1783 | 1558 if (invocation_counter()->carry() || ((mdo != NULL) ? mdo->invocation_counter()->carry() : false)) { |
| 1559 return InvocationCounter::count_limit; | |
| 1560 } else { | |
| 1561 return invocation_counter()->count() + ((mdo != NULL) ? mdo->invocation_counter()->count() : 0); | |
| 1562 } | |
| 1563 } else { | |
| 1564 return invocation_counter()->count(); | |
| 1565 } | |
| 1566 } | |
| 1567 | |
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1568 int Method::backedge_count() { |
| 1783 | 1569 if (TieredCompilation) { |
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1570 MethodData* const mdo = method_data(); |
| 1783 | 1571 if (backedge_counter()->carry() || ((mdo != NULL) ? mdo->backedge_counter()->carry() : false)) { |
| 1572 return InvocationCounter::count_limit; | |
| 1573 } else { | |
| 1574 return backedge_counter()->count() + ((mdo != NULL) ? mdo->backedge_counter()->count() : 0); | |
| 1575 } | |
| 1576 } else { | |
| 1577 return backedge_counter()->count(); | |
| 1578 } | |
| 1579 } | |
| 1580 | |
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1581 int Method::highest_comp_level() const { |
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1582 MethodData* mdo = method_data(); |
| 1783 | 1583 if (mdo != NULL) { |
| 1584 return mdo->highest_comp_level(); | |
| 1585 } else { | |
| 1586 return CompLevel_none; | |
| 1587 } | |
| 1588 } | |
| 1589 | |
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1590 int Method::highest_osr_comp_level() const { |
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1591 MethodData* mdo = method_data(); |
| 1783 | 1592 if (mdo != NULL) { |
| 1593 return mdo->highest_osr_comp_level(); | |
| 1594 } else { | |
| 1595 return CompLevel_none; | |
| 1596 } | |
| 1597 } | |
| 1598 | |
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1599 void Method::set_highest_comp_level(int level) { |
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1600 MethodData* mdo = method_data(); |
| 1783 | 1601 if (mdo != NULL) { |
| 1602 mdo->set_highest_comp_level(level); | |
| 1603 } | |
| 1604 } | |
| 1605 | |
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1606 void Method::set_highest_osr_comp_level(int level) { |
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1607 MethodData* mdo = method_data(); |
| 1783 | 1608 if (mdo != NULL) { |
| 1609 mdo->set_highest_osr_comp_level(level); | |
| 1610 } | |
| 1611 } | |
| 1612 | |
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1613 BreakpointInfo::BreakpointInfo(Method* m, int bci) { |
| 0 | 1614 _bci = bci; |
| 1615 _name_index = m->name_index(); | |
| 1616 _signature_index = m->signature_index(); | |
| 1617 _orig_bytecode = (Bytecodes::Code) *m->bcp_from(_bci); | |
| 1618 if (_orig_bytecode == Bytecodes::_breakpoint) | |
| 1619 _orig_bytecode = m->orig_bytecode_at(_bci); | |
| 1620 _next = NULL; | |
| 1621 } | |
| 1622 | |
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1623 void BreakpointInfo::set(Method* method) { |
| 0 | 1624 #ifdef ASSERT |
| 1625 { | |
| 1626 Bytecodes::Code code = (Bytecodes::Code) *method->bcp_from(_bci); | |
| 1627 if (code == Bytecodes::_breakpoint) | |
| 1628 code = method->orig_bytecode_at(_bci); | |
| 1629 assert(orig_bytecode() == code, "original bytecode must be the same"); | |
| 1630 } | |
| 1631 #endif | |
| 1632 *method->bcp_from(_bci) = Bytecodes::_breakpoint; | |
| 1633 method->incr_number_of_breakpoints(); | |
| 1634 SystemDictionary::notice_modification(); | |
| 1635 { | |
| 1636 // Deoptimize all dependents on this method | |
| 1637 Thread *thread = Thread::current(); | |
| 1638 HandleMark hm(thread); | |
| 1639 methodHandle mh(thread, method); | |
| 1640 Universe::flush_dependents_on_method(mh); | |
| 1641 } | |
| 1642 } | |
| 1643 | |
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1644 void BreakpointInfo::clear(Method* method) { |
| 0 | 1645 *method->bcp_from(_bci) = orig_bytecode(); |
| 1646 assert(method->number_of_breakpoints() > 0, "must not go negative"); | |
| 1647 method->decr_number_of_breakpoints(); | |
| 1648 } | |
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1649 |
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1650 // jmethodID handling |
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1651 |
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1652 // This is a block allocating object, sort of like JNIHandleBlock, only a |
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1653 // lot simpler. There aren't many of these, they aren't long, they are rarely |
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1654 // deleted and so we can do some suboptimal things. |
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1655 // It's allocated on the CHeap because once we allocate a jmethodID, we can |
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1656 // never get rid of it. |
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1657 // It would be nice to be able to parameterize the number of methods for |
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1658 // the null_class_loader but then we'd have to turn this and ClassLoaderData |
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1659 // into templates. |
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1660 |
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1661 // I feel like this brain dead class should exist somewhere in the STL |
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1662 |
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1663 class JNIMethodBlock : public CHeapObj<mtClass> { |
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1664 enum { number_of_methods = 8 }; |
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1665 |
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1666 Method* _methods[number_of_methods]; |
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1667 int _top; |
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1668 JNIMethodBlock* _next; |
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1669 public: |
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1670 static Method* const _free_method; |
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1671 |
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1672 JNIMethodBlock() : _next(NULL), _top(0) { |
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1673 for (int i = 0; i< number_of_methods; i++) _methods[i] = _free_method; |
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1674 } |
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1675 |
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1676 Method** add_method(Method* m) { |
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1677 if (_top < number_of_methods) { |
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1678 // top points to the next free entry. |
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1679 int i = _top; |
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1680 _methods[i] = m; |
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1681 _top++; |
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1682 return &_methods[i]; |
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1683 } else if (_top == number_of_methods) { |
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1684 // if the next free entry ran off the block see if there's a free entry |
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1685 for (int i = 0; i< number_of_methods; i++) { |
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1686 if (_methods[i] == _free_method) { |
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1687 _methods[i] = m; |
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1688 return &_methods[i]; |
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1689 } |
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1690 } |
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1691 // Only check each block once for frees. They're very unlikely. |
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1692 // Increment top past the end of the block. |
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1693 _top++; |
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1694 } |
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1695 // need to allocate a next block. |
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1696 if (_next == NULL) { |
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1697 _next = new JNIMethodBlock(); |
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1698 } |
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1699 return _next->add_method(m); |
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1700 } |
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1701 |
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1702 bool contains(Method** m) { |
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1703 for (JNIMethodBlock* b = this; b != NULL; b = b->_next) { |
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1704 for (int i = 0; i< number_of_methods; i++) { |
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1705 if (&(b->_methods[i]) == m) { |
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1706 return true; |
|
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1707 } |
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1708 } |
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1709 } |
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1710 return false; // not found |
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1711 } |
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1712 |
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1713 // Doesn't really destroy it, just marks it as free so it can be reused. |
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1714 void destroy_method(Method** m) { |
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1715 #ifdef ASSERT |
|
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1716 assert(contains(m), "should be a methodID"); |
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1717 #endif // ASSERT |
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1718 *m = _free_method; |
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1719 } |
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1720 |
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1721 // During class unloading the methods are cleared, which is different |
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1722 // than freed. |
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1723 void clear_all_methods() { |
|
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1724 for (JNIMethodBlock* b = this; b != NULL; b = b->_next) { |
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1725 for (int i = 0; i< number_of_methods; i++) { |
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1726 _methods[i] = NULL; |
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1727 } |
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1728 } |
|
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1729 } |
|
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1730 #ifndef PRODUCT |
|
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1731 int count_methods() { |
|
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1732 // count all allocated methods |
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1733 int count = 0; |
|
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1734 for (JNIMethodBlock* b = this; b != NULL; b = b->_next) { |
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1735 for (int i = 0; i< number_of_methods; i++) { |
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1736 if (_methods[i] != _free_method) count++; |
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1737 } |
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1738 } |
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1739 return count; |
|
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1740 } |
|
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1741 #endif // PRODUCT |
|
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1742 }; |
|
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1743 |
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1744 // Something that can't be mistaken for an address or a markOop |
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1745 Method* const JNIMethodBlock::_free_method = (Method*)55; |
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1746 |
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1747 // Add a method id to the jmethod_ids |
|
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1748 jmethodID Method::make_jmethod_id(ClassLoaderData* loader_data, Method* m) { |
|
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1749 ClassLoaderData* cld = loader_data; |
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1750 |
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1751 if (!SafepointSynchronize::is_at_safepoint()) { |
|
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1752 // Have to add jmethod_ids() to class loader data thread-safely. |
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1753 // Also have to add the method to the list safely, which the cld lock |
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1754 // protects as well. |
|
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1755 MutexLockerEx ml(cld->metaspace_lock(), Mutex::_no_safepoint_check_flag); |
|
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1756 if (cld->jmethod_ids() == NULL) { |
|
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1757 cld->set_jmethod_ids(new JNIMethodBlock()); |
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1758 } |
|
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1759 // jmethodID is a pointer to Method* |
|
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1760 return (jmethodID)cld->jmethod_ids()->add_method(m); |
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1761 } else { |
|
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1762 // At safepoint, we are single threaded and can set this. |
|
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1763 if (cld->jmethod_ids() == NULL) { |
|
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1764 cld->set_jmethod_ids(new JNIMethodBlock()); |
|
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1765 } |
|
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1766 // jmethodID is a pointer to Method* |
|
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1767 return (jmethodID)cld->jmethod_ids()->add_method(m); |
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1768 } |
|
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1769 } |
|
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1770 |
|
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1771 // Mark a jmethodID as free. This is called when there is a data race in |
|
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1772 // InstanceKlass while creating the jmethodID cache. |
|
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1773 void Method::destroy_jmethod_id(ClassLoaderData* loader_data, jmethodID m) { |
|
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1774 ClassLoaderData* cld = loader_data; |
|
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1775 Method** ptr = (Method**)m; |
|
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1776 assert(cld->jmethod_ids() != NULL, "should have method handles"); |
|
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1777 cld->jmethod_ids()->destroy_method(ptr); |
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1778 } |
|
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1779 |
|
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1780 void Method::change_method_associated_with_jmethod_id(jmethodID jmid, Method* new_method) { |
|
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1781 // Can't assert the method_holder is the same because the new method has the |
|
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1782 // scratch method holder. |
|
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1783 assert(resolve_jmethod_id(jmid)->method_holder()->class_loader() |
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1784 == new_method->method_holder()->class_loader(), |
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1785 "changing to a different class loader"); |
|
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1786 // Just change the method in place, jmethodID pointer doesn't change. |
|
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1787 *((Method**)jmid) = new_method; |
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1788 } |
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1789 |
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1790 bool Method::is_method_id(jmethodID mid) { |
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1791 Method* m = resolve_jmethod_id(mid); |
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1792 assert(m != NULL, "should be called with non-null method"); |
|
6940
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|
1793 InstanceKlass* ik = m->method_holder(); |
|
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1794 ClassLoaderData* cld = ik->class_loader_data(); |
|
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1795 if (cld->jmethod_ids() == NULL) return false; |
|
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1796 return (cld->jmethod_ids()->contains((Method**)mid)); |
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1797 } |
|
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1798 |
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1799 Method* Method::checked_resolve_jmethod_id(jmethodID mid) { |
|
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1800 if (mid == NULL) return NULL; |
|
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1801 Method* o = resolve_jmethod_id(mid); |
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1802 if (o == NULL || o == JNIMethodBlock::_free_method || !((Metadata*)o)->is_method()) { |
|
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1803 return NULL; |
|
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1804 } |
|
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1805 return o; |
|
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1806 }; |
|
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1807 |
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1808 void Method::set_on_stack(const bool value) { |
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1809 // Set both the method itself and its constant pool. The constant pool |
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1810 // on stack means some method referring to it is also on the stack. |
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1811 _access_flags.set_on_stack(value); |
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1812 constants()->set_on_stack(value); |
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1813 if (value) MetadataOnStackMark::record(this); |
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1814 } |
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1815 |
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1816 // Called when the class loader is unloaded to make all methods weak. |
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1817 void Method::clear_jmethod_ids(ClassLoaderData* loader_data) { |
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1818 loader_data->jmethod_ids()->clear_all_methods(); |
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1819 } |
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1820 |
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1821 |
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1822 // Check that this pointer is valid by checking that the vtbl pointer matches |
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1823 bool Method::is_valid_method() const { |
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1824 if (this == NULL) { |
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1825 return false; |
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1826 } else if (!is_metaspace_object()) { |
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1827 return false; |
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1828 } else { |
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1829 Method m; |
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1830 // This assumes that the vtbl pointer is the first word of a C++ object. |
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1831 // This assumption is also in universe.cpp patch_klass_vtble |
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1832 void* vtbl2 = dereference_vptr((void*)&m); |
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1833 void* this_vtbl = dereference_vptr((void*)this); |
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1834 return vtbl2 == this_vtbl; |
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1835 } |
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1836 } |
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1837 |
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1838 #ifndef PRODUCT |
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1839 void Method::print_jmethod_ids(ClassLoaderData* loader_data, outputStream* out) { |
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1840 out->print_cr("jni_method_id count = %d", loader_data->jmethod_ids()->count_methods()); |
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1841 } |
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1842 #endif // PRODUCT |
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1843 |
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1844 |
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1845 // Printing |
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1846 |
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1847 #ifndef PRODUCT |
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1848 |
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1849 void Method::print_on(outputStream* st) const { |
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1850 ResourceMark rm; |
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1851 assert(is_method(), "must be method"); |
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1852 st->print_cr(internal_name()); |
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1853 // get the effect of PrintOopAddress, always, for methods: |
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1854 st->print_cr(" - this oop: "INTPTR_FORMAT, (intptr_t)this); |
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1855 st->print (" - method holder: "); method_holder()->print_value_on(st); st->cr(); |
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1856 st->print (" - constants: "INTPTR_FORMAT" ", (address)constants()); |
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1857 constants()->print_value_on(st); st->cr(); |
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1858 st->print (" - access: 0x%x ", access_flags().as_int()); access_flags().print_on(st); st->cr(); |
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1859 st->print (" - name: "); name()->print_value_on(st); st->cr(); |
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1860 st->print (" - signature: "); signature()->print_value_on(st); st->cr(); |
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1861 st->print_cr(" - max stack: %d", max_stack()); |
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1862 st->print_cr(" - max locals: %d", max_locals()); |
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1863 st->print_cr(" - size of params: %d", size_of_parameters()); |
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1864 st->print_cr(" - method size: %d", method_size()); |
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1865 if (intrinsic_id() != vmIntrinsics::_none) |
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1866 st->print_cr(" - intrinsic id: %d %s", intrinsic_id(), vmIntrinsics::name_at(intrinsic_id())); |
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1867 if (highest_comp_level() != CompLevel_none) |
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1868 st->print_cr(" - highest level: %d", highest_comp_level()); |
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1869 st->print_cr(" - vtable index: %d", _vtable_index); |
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1870 st->print_cr(" - i2i entry: " INTPTR_FORMAT, interpreter_entry()); |
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1871 st->print( " - adapters: "); |
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1872 AdapterHandlerEntry* a = ((Method*)this)->adapter(); |
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1873 if (a == NULL) |
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1874 st->print_cr(INTPTR_FORMAT, a); |
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1875 else |
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1876 a->print_adapter_on(st); |
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1877 st->print_cr(" - compiled entry " INTPTR_FORMAT, from_compiled_entry()); |
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1878 st->print_cr(" - code size: %d", code_size()); |
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1879 if (code_size() != 0) { |
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1880 st->print_cr(" - code start: " INTPTR_FORMAT, code_base()); |
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1881 st->print_cr(" - code end (excl): " INTPTR_FORMAT, code_base() + code_size()); |
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1882 } |
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1883 if (method_data() != NULL) { |
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1884 st->print_cr(" - method data: " INTPTR_FORMAT, (address)method_data()); |
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1885 } |
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1886 st->print_cr(" - checked ex length: %d", checked_exceptions_length()); |
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1887 if (checked_exceptions_length() > 0) { |
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1888 CheckedExceptionElement* table = checked_exceptions_start(); |
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1889 st->print_cr(" - checked ex start: " INTPTR_FORMAT, table); |
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1890 if (Verbose) { |
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1891 for (int i = 0; i < checked_exceptions_length(); i++) { |
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1892 st->print_cr(" - throws %s", constants()->printable_name_at(table[i].class_cp_index)); |
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1893 } |
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1894 } |
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1895 } |
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1896 if (has_linenumber_table()) { |
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1897 u_char* table = compressed_linenumber_table(); |
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1898 st->print_cr(" - linenumber start: " INTPTR_FORMAT, table); |
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1899 if (Verbose) { |
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1900 CompressedLineNumberReadStream stream(table); |
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1901 while (stream.read_pair()) { |
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1902 st->print_cr(" - line %d: %d", stream.line(), stream.bci()); |
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1903 } |
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1904 } |
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1905 } |
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1906 st->print_cr(" - localvar length: %d", localvariable_table_length()); |
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1907 if (localvariable_table_length() > 0) { |
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1908 LocalVariableTableElement* table = localvariable_table_start(); |
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1909 st->print_cr(" - localvar start: " INTPTR_FORMAT, table); |
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1910 if (Verbose) { |
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1911 for (int i = 0; i < localvariable_table_length(); i++) { |
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1912 int bci = table[i].start_bci; |
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1913 int len = table[i].length; |
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1914 const char* name = constants()->printable_name_at(table[i].name_cp_index); |
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1915 const char* desc = constants()->printable_name_at(table[i].descriptor_cp_index); |
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1916 int slot = table[i].slot; |
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1917 st->print_cr(" - %s %s bci=%d len=%d slot=%d", desc, name, bci, len, slot); |
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1918 } |
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1919 } |
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1920 } |
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1921 if (code() != NULL) { |
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1922 st->print (" - compiled code: "); |
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1923 code()->print_value_on(st); |
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1924 } |
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1925 if (is_native()) { |
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1926 st->print_cr(" - native function: " INTPTR_FORMAT, native_function()); |
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1927 st->print_cr(" - signature handler: " INTPTR_FORMAT, signature_handler()); |
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1928 } |
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1929 } |
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1930 |
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1931 #endif //PRODUCT |
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1932 |
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1933 void Method::print_value_on(outputStream* st) const { |
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1934 assert(is_method(), "must be method"); |
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1935 st->print_cr(internal_name()); |
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1936 print_address_on(st); |
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1937 st->print(" "); |
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1938 name()->print_value_on(st); |
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1939 st->print(" "); |
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1940 signature()->print_value_on(st); |
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1941 st->print(" in "); |
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1942 method_holder()->print_value_on(st); |
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1943 if (WizardMode) st->print("[%d,%d]", size_of_parameters(), max_locals()); |
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1944 if (WizardMode && code() != NULL) st->print(" ((nmethod*)%p)", code()); |
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1945 } |
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1946 |
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1947 |
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1948 // Verification |
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1949 |
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1950 void Method::verify_on(outputStream* st) { |
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1951 guarantee(is_method(), "object must be method"); |
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1952 guarantee(is_metadata(), "should be metadata"); |
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1953 guarantee(constants()->is_constantPool(), "should be constant pool"); |
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1954 guarantee(constants()->is_metadata(), "should be metadata"); |
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1955 guarantee(constMethod()->is_constMethod(), "should be ConstMethod*"); |
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1956 guarantee(constMethod()->is_metadata(), "should be metadata"); |
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1957 MethodData* md = method_data(); |
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1958 guarantee(md == NULL || |
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1959 md->is_metadata(), "should be metadata"); |
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1960 guarantee(md == NULL || |
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1961 md->is_methodData(), "should be method data"); |
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1962 } |