Mercurial > hg > truffle
annotate src/share/vm/oops/method.cpp @ 7666:31540ca73e81
Remove ControlFlowException in SimpleLanguage.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Fri, 01 Feb 2013 19:53:52 +0100 |
parents | 989155e2d07a |
children | 5fc51c1ecdeb |
rev | line source |
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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" |
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56 #ifdef GRAAL |
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57 #include "graal/graalJavaAccess.hpp" |
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58 #endif |
0 | 59 |
60 | |
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61 // Implementation of Method |
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62 |
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63 Method* Method::allocate(ClassLoaderData* loader_data, |
6934 | 64 int byte_code_size, |
65 AccessFlags access_flags, | |
66 int compressed_line_number_size, | |
67 int localvariable_table_length, | |
68 int exception_table_length, | |
69 int checked_exceptions_length, | |
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70 int method_parameters_length, |
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71 u2 generic_signature_index, |
6934 | 72 ConstMethod::MethodType method_type, |
73 TRAPS) { | |
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74 assert(!access_flags.is_native() || byte_code_size == 0, |
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75 "native methods should not contain byte codes"); |
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76 ConstMethod* cm = ConstMethod::allocate(loader_data, |
6934 | 77 byte_code_size, |
78 compressed_line_number_size, | |
79 localvariable_table_length, | |
80 exception_table_length, | |
81 checked_exceptions_length, | |
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82 method_parameters_length, |
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83 generic_signature_index, |
6934 | 84 method_type, |
85 CHECK_NULL); | |
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86 |
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87 int size = Method::size(access_flags.is_native()); |
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88 |
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89 return new (loader_data, size, false, THREAD) Method(cm, access_flags, size); |
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90 } |
0 | 91 |
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92 Method::Method(ConstMethod* xconst, |
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93 AccessFlags access_flags, int size) { |
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94 No_Safepoint_Verifier no_safepoint; |
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95 set_constMethod(xconst); |
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96 set_access_flags(access_flags); |
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97 set_method_size(size); |
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98 set_name_index(0); |
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99 set_signature_index(0); |
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100 #ifdef CC_INTERP |
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101 set_result_index(T_VOID); |
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102 #endif |
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103 set_constants(NULL); |
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104 set_max_stack(0); |
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105 set_max_locals(0); |
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106 set_intrinsic_id(vmIntrinsics::_none); |
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107 set_jfr_towrite(false); |
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108 set_method_data(NULL); |
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109 set_interpreter_throwout_count(0); |
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110 set_vtable_index(Method::garbage_vtable_index); |
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111 |
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112 // Fix and bury in Method* |
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113 set_interpreter_entry(NULL); // sets i2i entry and from_int |
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114 set_adapter_entry(NULL); |
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115 clear_code(); // from_c/from_i get set to c2i/i2i |
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116 |
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117 if (access_flags.is_native()) { |
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118 clear_native_function(); |
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119 set_signature_handler(NULL); |
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120 } |
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121 |
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122 NOT_PRODUCT(set_compiled_invocation_count(0);) |
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123 set_interpreter_invocation_count(0); |
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124 invocation_counter()->init(); |
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125 backedge_counter()->init(); |
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126 clear_number_of_breakpoints(); |
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127 |
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128 #ifdef GRAAL |
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129 set_graal_invocation_time(0L); |
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130 set_graal_priority(0); |
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131 #endif |
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132 |
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133 #ifdef TIERED |
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134 set_rate(0); |
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135 set_prev_event_count(0); |
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136 set_prev_time(0); |
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137 #endif |
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138 } |
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139 |
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140 // Release Method*. The nmethod will be gone when we get here because |
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141 // we've walked the code cache. |
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142 void Method::deallocate_contents(ClassLoaderData* loader_data) { |
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143 MetadataFactory::free_metadata(loader_data, constMethod()); |
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144 set_constMethod(NULL); |
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145 MetadataFactory::free_metadata(loader_data, method_data()); |
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146 set_method_data(NULL); |
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147 // The nmethod will be gone when we get here. |
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148 if (code() != NULL) _code = NULL; |
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149 } |
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150 |
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151 address Method::get_i2c_entry() { |
0 | 152 assert(_adapter != NULL, "must have"); |
153 return _adapter->get_i2c_entry(); | |
154 } | |
155 | |
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156 address Method::get_c2i_entry() { |
0 | 157 assert(_adapter != NULL, "must have"); |
158 return _adapter->get_c2i_entry(); | |
159 } | |
160 | |
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161 address Method::get_c2i_unverified_entry() { |
0 | 162 assert(_adapter != NULL, "must have"); |
163 return _adapter->get_c2i_unverified_entry(); | |
164 } | |
165 | |
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166 char* Method::name_and_sig_as_C_string() const { |
6983 | 167 return name_and_sig_as_C_string(constants()->pool_holder(), name(), signature()); |
0 | 168 } |
169 | |
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170 char* Method::name_and_sig_as_C_string(char* buf, int size) const { |
6983 | 171 return name_and_sig_as_C_string(constants()->pool_holder(), name(), signature(), buf, size); |
0 | 172 } |
173 | |
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174 char* Method::name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature) { |
0 | 175 const char* klass_name = klass->external_name(); |
176 int klass_name_len = (int)strlen(klass_name); | |
177 int method_name_len = method_name->utf8_length(); | |
178 int len = klass_name_len + 1 + method_name_len + signature->utf8_length(); | |
179 char* dest = NEW_RESOURCE_ARRAY(char, len + 1); | |
180 strcpy(dest, klass_name); | |
181 dest[klass_name_len] = '.'; | |
182 strcpy(&dest[klass_name_len + 1], method_name->as_C_string()); | |
183 strcpy(&dest[klass_name_len + 1 + method_name_len], signature->as_C_string()); | |
184 dest[len] = 0; | |
185 return dest; | |
186 } | |
187 | |
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188 char* Method::name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size) { |
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189 Symbol* klass_name = klass->name(); |
0 | 190 klass_name->as_klass_external_name(buf, size); |
191 int len = (int)strlen(buf); | |
192 | |
193 if (len < size - 1) { | |
194 buf[len++] = '.'; | |
195 | |
196 method_name->as_C_string(&(buf[len]), size - len); | |
197 len = (int)strlen(buf); | |
198 | |
199 signature->as_C_string(&(buf[len]), size - len); | |
200 } | |
201 | |
202 return buf; | |
203 } | |
204 | |
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205 int Method::fast_exception_handler_bci_for(methodHandle mh, KlassHandle ex_klass, int throw_bci, TRAPS) { |
0 | 206 // exception table holds quadruple entries of the form (beg_bci, end_bci, handler_bci, klass_index) |
207 // access exception table | |
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208 ExceptionTable table(mh()); |
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209 int length = table.length(); |
0 | 210 // iterate through all entries sequentially |
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211 constantPoolHandle pool(THREAD, mh->constants()); |
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212 for (int i = 0; i < length; i ++) { |
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213 //reacquire the table in case a GC happened |
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214 ExceptionTable table(mh()); |
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215 int beg_bci = table.start_pc(i); |
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216 int end_bci = table.end_pc(i); |
0 | 217 assert(beg_bci <= end_bci, "inconsistent exception table"); |
218 if (beg_bci <= throw_bci && throw_bci < end_bci) { | |
219 // exception handler bci range covers throw_bci => investigate further | |
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220 int handler_bci = table.handler_pc(i); |
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221 int klass_index = table.catch_type_index(i); |
0 | 222 if (klass_index == 0) { |
223 return handler_bci; | |
224 } else if (ex_klass.is_null()) { | |
225 return handler_bci; | |
226 } else { | |
227 // we know the exception class => get the constraint class | |
228 // this may require loading of the constraint class; if verification | |
229 // fails or some other exception occurs, return handler_bci | |
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230 Klass* k = pool->klass_at(klass_index, CHECK_(handler_bci)); |
0 | 231 KlassHandle klass = KlassHandle(THREAD, k); |
232 assert(klass.not_null(), "klass not loaded"); | |
233 if (ex_klass->is_subtype_of(klass())) { | |
234 return handler_bci; | |
235 } | |
236 } | |
237 } | |
238 } | |
239 | |
240 return -1; | |
241 } | |
242 | |
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243 void Method::mask_for(int bci, InterpreterOopMap* mask) { |
0 | 244 |
245 Thread* myThread = Thread::current(); | |
246 methodHandle h_this(myThread, this); | |
247 #ifdef ASSERT | |
248 bool has_capability = myThread->is_VM_thread() || | |
249 myThread->is_ConcurrentGC_thread() || | |
250 myThread->is_GC_task_thread(); | |
251 | |
252 if (!has_capability) { | |
253 if (!VerifyStack && !VerifyLastFrame) { | |
254 // verify stack calls this outside VM thread | |
255 warning("oopmap should only be accessed by the " | |
256 "VM, GC task or CMS threads (or during debugging)"); | |
257 InterpreterOopMap local_mask; | |
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258 method_holder()->mask_for(h_this, bci, &local_mask); |
0 | 259 local_mask.print(); |
260 } | |
261 } | |
262 #endif | |
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263 method_holder()->mask_for(h_this, bci, mask); |
0 | 264 return; |
265 } | |
266 | |
267 | |
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268 int Method::bci_from(address bcp) const { |
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269 #ifdef ASSERT |
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270 { ResourceMark rm; |
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271 assert(is_native() && bcp == code_base() || contains(bcp) || is_error_reported(), |
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272 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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273 } |
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274 #endif |
0 | 275 return bcp - code_base(); |
276 } | |
277 | |
278 | |
279 // Return (int)bcx if it appears to be a valid BCI. | |
280 // Return bci_from((address)bcx) if it appears to be a valid BCP. | |
281 // Return -1 otherwise. | |
282 // Used by profiling code, when invalid data is a possibility. | |
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283 // The caller is responsible for validating the Method* itself. |
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284 int Method::validate_bci_from_bcx(intptr_t bcx) const { |
0 | 285 // keep bci as -1 if not a valid bci |
286 int bci = -1; | |
287 if (bcx == 0 || (address)bcx == code_base()) { | |
288 // code_size() may return 0 and we allow 0 here | |
289 // the method may be native | |
290 bci = 0; | |
291 } else if (frame::is_bci(bcx)) { | |
292 if (bcx < code_size()) { | |
293 bci = (int)bcx; | |
294 } | |
295 } else if (contains((address)bcx)) { | |
296 bci = (address)bcx - code_base(); | |
297 } | |
298 // Assert that if we have dodged any asserts, bci is negative. | |
299 assert(bci == -1 || bci == bci_from(bcp_from(bci)), "sane bci if >=0"); | |
300 return bci; | |
301 } | |
302 | |
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303 address Method::bcp_from(int bci) const { |
0 | 304 assert((is_native() && bci == 0) || (!is_native() && 0 <= bci && bci < code_size()), "illegal bci"); |
305 address bcp = code_base() + bci; | |
306 assert(is_native() && bcp == code_base() || contains(bcp), "bcp doesn't belong to this method"); | |
307 return bcp; | |
308 } | |
309 | |
310 | |
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311 int Method::size(bool is_native) { |
0 | 312 // If native, then include pointers for native_function and signature_handler |
313 int extra_bytes = (is_native) ? 2*sizeof(address*) : 0; | |
314 int extra_words = align_size_up(extra_bytes, BytesPerWord) / BytesPerWord; | |
315 return align_object_size(header_size() + extra_words); | |
316 } | |
317 | |
318 | |
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319 Symbol* Method::klass_name() const { |
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320 Klass* k = method_holder(); |
0 | 321 assert(k->is_klass(), "must be klass"); |
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322 InstanceKlass* ik = (InstanceKlass*) k; |
0 | 323 return ik->name(); |
324 } | |
325 | |
326 | |
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327 void Method::set_interpreter_kind() { |
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328 int kind = Interpreter::method_kind(this); |
0 | 329 assert(kind != Interpreter::invalid, |
330 "interpreter entry must be valid"); | |
331 set_interpreter_kind(kind); | |
332 } | |
333 | |
334 | |
335 // Attempt to return method oop to original state. Clear any pointers | |
336 // (to objects outside the shared spaces). We won't be able to predict | |
337 // where they should point in a new JVM. Further initialize some | |
338 // entries now in order allow them to be write protected later. | |
339 | |
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340 void Method::remove_unshareable_info() { |
0 | 341 unlink_method(); |
342 set_interpreter_kind(); | |
343 } | |
344 | |
345 | |
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346 bool Method::was_executed_more_than(int n) { |
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347 // Invocation counter is reset when the Method* is compiled. |
0 | 348 // If the method has compiled code we therefore assume it has |
349 // be excuted more than n times. | |
350 if (is_accessor() || is_empty_method() || (code() != NULL)) { | |
351 // interpreter doesn't bump invocation counter of trivial methods | |
352 // compiler does not bump invocation counter of compiled methods | |
353 return true; | |
1783 | 354 } |
355 else if (_invocation_counter.carry() || (method_data() != NULL && method_data()->invocation_counter()->carry())) { | |
0 | 356 // The carry bit is set when the counter overflows and causes |
357 // a compilation to occur. We don't know how many times | |
358 // the counter has been reset, so we simply assume it has | |
359 // been executed more than n times. | |
360 return true; | |
361 } else { | |
362 return invocation_count() > n; | |
363 } | |
364 } | |
365 | |
366 #ifndef PRODUCT | |
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367 void Method::print_invocation_count() { |
0 | 368 if (is_static()) tty->print("static "); |
369 if (is_final()) tty->print("final "); | |
370 if (is_synchronized()) tty->print("synchronized "); | |
371 if (is_native()) tty->print("native "); | |
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372 method_holder()->name()->print_symbol_on(tty); |
0 | 373 tty->print("."); |
374 name()->print_symbol_on(tty); | |
375 signature()->print_symbol_on(tty); | |
376 | |
377 if (WizardMode) { | |
378 // dump the size of the byte codes | |
379 tty->print(" {%d}", code_size()); | |
380 } | |
381 tty->cr(); | |
382 | |
383 tty->print_cr (" interpreter_invocation_count: %8d ", interpreter_invocation_count()); | |
384 tty->print_cr (" invocation_counter: %8d ", invocation_count()); | |
385 tty->print_cr (" backedge_counter: %8d ", backedge_count()); | |
386 if (CountCompiledCalls) { | |
387 tty->print_cr (" compiled_invocation_count: %8d ", compiled_invocation_count()); | |
388 } | |
389 | |
390 } | |
391 #endif | |
392 | |
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393 // Build a MethodData* object to hold information about this method |
0 | 394 // collected in the interpreter. |
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395 void Method::build_interpreter_method_data(methodHandle method, TRAPS) { |
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396 // Do not profile method if current thread holds the pending list lock, |
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397 // which avoids deadlock for acquiring the MethodData_lock. |
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398 if (InstanceRefKlass::owns_pending_list_lock((JavaThread*)THREAD)) { |
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399 return; |
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400 } |
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401 |
0 | 402 // Grab a lock here to prevent multiple |
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403 // MethodData*s from being created. |
0 | 404 MutexLocker ml(MethodData_lock, THREAD); |
405 if (method->method_data() == NULL) { | |
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406 ClassLoaderData* loader_data = method->method_holder()->class_loader_data(); |
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407 MethodData* method_data = MethodData::allocate(loader_data, method, CHECK); |
0 | 408 method->set_method_data(method_data); |
409 if (PrintMethodData && (Verbose || WizardMode)) { | |
410 ResourceMark rm(THREAD); | |
411 tty->print("build_interpreter_method_data for "); | |
412 method->print_name(tty); | |
413 tty->cr(); | |
414 // At the end of the run, the MDO, full of data, will be dumped. | |
415 } | |
416 } | |
417 } | |
418 | |
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419 void Method::cleanup_inline_caches() { |
0 | 420 // The current system doesn't use inline caches in the interpreter |
421 // => nothing to do (keep this method around for future use) | |
422 } | |
423 | |
424 | |
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425 int Method::extra_stack_words() { |
710 | 426 // not an inline function, to avoid a header dependency on Interpreter |
1506 | 427 return extra_stack_entries() * Interpreter::stackElementSize; |
710 | 428 } |
429 | |
430 | |
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431 void Method::compute_size_of_parameters(Thread *thread) { |
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432 ArgumentSizeComputer asc(signature()); |
0 | 433 set_size_of_parameters(asc.size() + (is_static() ? 0 : 1)); |
434 } | |
435 | |
436 #ifdef CC_INTERP | |
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437 void Method::set_result_index(BasicType type) { |
0 | 438 _result_index = Interpreter::BasicType_as_index(type); |
439 } | |
440 #endif | |
441 | |
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442 BasicType Method::result_type() const { |
0 | 443 ResultTypeFinder rtf(signature()); |
444 return rtf.type(); | |
445 } | |
446 | |
447 | |
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448 bool Method::is_empty_method() const { |
0 | 449 return code_size() == 1 |
450 && *code_base() == Bytecodes::_return; | |
451 } | |
452 | |
453 | |
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454 bool Method::is_vanilla_constructor() const { |
0 | 455 // Returns true if this method is a vanilla constructor, i.e. an "<init>" "()V" method |
456 // which only calls the superclass vanilla constructor and possibly does stores of | |
457 // zero constants to local fields: | |
458 // | |
459 // aload_0 | |
460 // invokespecial | |
461 // indexbyte1 | |
462 // indexbyte2 | |
463 // | |
464 // followed by an (optional) sequence of: | |
465 // | |
466 // aload_0 | |
467 // aconst_null / iconst_0 / fconst_0 / dconst_0 | |
468 // putfield | |
469 // indexbyte1 | |
470 // indexbyte2 | |
471 // | |
472 // followed by: | |
473 // | |
474 // return | |
475 | |
476 assert(name() == vmSymbols::object_initializer_name(), "Should only be called for default constructors"); | |
477 assert(signature() == vmSymbols::void_method_signature(), "Should only be called for default constructors"); | |
478 int size = code_size(); | |
479 // Check if size match | |
480 if (size == 0 || size % 5 != 0) return false; | |
481 address cb = code_base(); | |
482 int last = size - 1; | |
483 if (cb[0] != Bytecodes::_aload_0 || cb[1] != Bytecodes::_invokespecial || cb[last] != Bytecodes::_return) { | |
484 // Does not call superclass default constructor | |
485 return false; | |
486 } | |
487 // Check optional sequence | |
488 for (int i = 4; i < last; i += 5) { | |
489 if (cb[i] != Bytecodes::_aload_0) return false; | |
490 if (!Bytecodes::is_zero_const(Bytecodes::cast(cb[i+1]))) return false; | |
491 if (cb[i+2] != Bytecodes::_putfield) return false; | |
492 } | |
493 return true; | |
494 } | |
495 | |
496 | |
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497 bool Method::compute_has_loops_flag() { |
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498 BytecodeStream bcs(this); |
0 | 499 Bytecodes::Code bc; |
500 | |
501 while ((bc = bcs.next()) >= 0) { | |
502 switch( bc ) { | |
503 case Bytecodes::_ifeq: | |
504 case Bytecodes::_ifnull: | |
505 case Bytecodes::_iflt: | |
506 case Bytecodes::_ifle: | |
507 case Bytecodes::_ifne: | |
508 case Bytecodes::_ifnonnull: | |
509 case Bytecodes::_ifgt: | |
510 case Bytecodes::_ifge: | |
511 case Bytecodes::_if_icmpeq: | |
512 case Bytecodes::_if_icmpne: | |
513 case Bytecodes::_if_icmplt: | |
514 case Bytecodes::_if_icmpgt: | |
515 case Bytecodes::_if_icmple: | |
516 case Bytecodes::_if_icmpge: | |
517 case Bytecodes::_if_acmpeq: | |
518 case Bytecodes::_if_acmpne: | |
519 case Bytecodes::_goto: | |
520 case Bytecodes::_jsr: | |
521 if( bcs.dest() < bcs.next_bci() ) _access_flags.set_has_loops(); | |
522 break; | |
523 | |
524 case Bytecodes::_goto_w: | |
525 case Bytecodes::_jsr_w: | |
526 if( bcs.dest_w() < bcs.next_bci() ) _access_flags.set_has_loops(); | |
527 break; | |
528 } | |
529 } | |
530 _access_flags.set_loops_flag_init(); | |
531 return _access_flags.has_loops(); | |
532 } | |
533 | |
534 | |
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535 bool Method::is_final_method() const { |
0 | 536 // %%% Should return true for private methods also, |
537 // since there is no way to override them. | |
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538 return is_final() || method_holder()->is_final(); |
0 | 539 } |
540 | |
541 | |
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542 bool Method::is_strict_method() const { |
0 | 543 return is_strict(); |
544 } | |
545 | |
546 | |
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547 bool Method::can_be_statically_bound() const { |
0 | 548 if (is_final_method()) return true; |
549 return vtable_index() == nonvirtual_vtable_index; | |
550 } | |
551 | |
552 | |
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553 bool Method::is_accessor() const { |
0 | 554 if (code_size() != 5) return false; |
555 if (size_of_parameters() != 1) return false; | |
2142 | 556 if (java_code_at(0) != Bytecodes::_aload_0 ) return false; |
557 if (java_code_at(1) != Bytecodes::_getfield) return false; | |
558 if (java_code_at(4) != Bytecodes::_areturn && | |
559 java_code_at(4) != Bytecodes::_ireturn ) return false; | |
0 | 560 return true; |
561 } | |
562 | |
563 | |
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564 bool Method::is_initializer() const { |
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565 return name() == vmSymbols::object_initializer_name() || is_static_initializer(); |
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566 } |
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567 |
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568 bool Method::has_valid_initializer_flags() const { |
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569 return (is_static() || |
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570 method_holder()->major_version() < 51); |
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571 } |
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572 |
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573 bool Method::is_static_initializer() const { |
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574 // For classfiles version 51 or greater, ensure that the clinit method is |
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575 // static. Non-static methods with the name "<clinit>" are not static |
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576 // initializers. (older classfiles exempted for backward compatibility) |
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577 return name() == vmSymbols::class_initializer_name() && |
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578 has_valid_initializer_flags(); |
0 | 579 } |
580 | |
581 | |
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582 objArrayHandle Method::resolved_checked_exceptions_impl(Method* this_oop, TRAPS) { |
0 | 583 int length = this_oop->checked_exceptions_length(); |
584 if (length == 0) { // common case | |
585 return objArrayHandle(THREAD, Universe::the_empty_class_klass_array()); | |
586 } else { | |
587 methodHandle h_this(THREAD, this_oop); | |
1142 | 588 objArrayOop m_oop = oopFactory::new_objArray(SystemDictionary::Class_klass(), length, CHECK_(objArrayHandle())); |
0 | 589 objArrayHandle mirrors (THREAD, m_oop); |
590 for (int i = 0; i < length; i++) { | |
591 CheckedExceptionElement* table = h_this->checked_exceptions_start(); // recompute on each iteration, not gc safe | |
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592 Klass* k = h_this->constants()->klass_at(table[i].class_cp_index, CHECK_(objArrayHandle())); |
6983 | 593 assert(k->is_subclass_of(SystemDictionary::Throwable_klass()), "invalid exception class"); |
594 mirrors->obj_at_put(i, k->java_mirror()); | |
0 | 595 } |
596 return mirrors; | |
597 } | |
598 }; | |
599 | |
600 | |
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601 int Method::line_number_from_bci(int bci) const { |
0 | 602 if (bci == SynchronizationEntryBCI) bci = 0; |
603 assert(bci == 0 || 0 <= bci && bci < code_size(), "illegal bci"); | |
604 int best_bci = 0; | |
605 int best_line = -1; | |
606 | |
607 if (has_linenumber_table()) { | |
608 // The line numbers are a short array of 2-tuples [start_pc, line_number]. | |
609 // Not necessarily sorted and not necessarily one-to-one. | |
610 CompressedLineNumberReadStream stream(compressed_linenumber_table()); | |
611 while (stream.read_pair()) { | |
612 if (stream.bci() == bci) { | |
613 // perfect match | |
614 return stream.line(); | |
615 } else { | |
616 // update best_bci/line | |
617 if (stream.bci() < bci && stream.bci() >= best_bci) { | |
618 best_bci = stream.bci(); | |
619 best_line = stream.line(); | |
620 } | |
621 } | |
622 } | |
623 } | |
624 return best_line; | |
625 } | |
626 | |
627 | |
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628 bool Method::is_klass_loaded_by_klass_index(int klass_index) const { |
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629 if( constants()->tag_at(klass_index).is_unresolved_klass() ) { |
0 | 630 Thread *thread = Thread::current(); |
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631 Symbol* klass_name = constants()->klass_name_at(klass_index); |
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632 Handle loader(thread, method_holder()->class_loader()); |
6983 | 633 Handle prot (thread, method_holder()->protection_domain()); |
0 | 634 return SystemDictionary::find(klass_name, loader, prot, thread) != NULL; |
635 } else { | |
636 return true; | |
637 } | |
638 } | |
639 | |
640 | |
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641 bool Method::is_klass_loaded(int refinfo_index, bool must_be_resolved) const { |
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642 int klass_index = constants()->klass_ref_index_at(refinfo_index); |
0 | 643 if (must_be_resolved) { |
644 // Make sure klass is resolved in constantpool. | |
645 if (constants()->tag_at(klass_index).is_unresolved_klass()) return false; | |
646 } | |
647 return is_klass_loaded_by_klass_index(klass_index); | |
648 } | |
649 | |
650 | |
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651 void Method::set_native_function(address function, bool post_event_flag) { |
0 | 652 assert(function != NULL, "use clear_native_function to unregister natives"); |
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653 assert(!is_method_handle_intrinsic() || function == SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), ""); |
0 | 654 address* native_function = native_function_addr(); |
655 | |
656 // We can see racers trying to place the same native function into place. Once | |
657 // is plenty. | |
658 address current = *native_function; | |
659 if (current == function) return; | |
660 if (post_event_flag && JvmtiExport::should_post_native_method_bind() && | |
661 function != NULL) { | |
662 // native_method_throw_unsatisfied_link_error_entry() should only | |
663 // be passed when post_event_flag is false. | |
664 assert(function != | |
665 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
666 "post_event_flag mis-match"); | |
667 | |
668 // post the bind event, and possible change the bind function | |
669 JvmtiExport::post_native_method_bind(this, &function); | |
670 } | |
671 *native_function = function; | |
672 // This function can be called more than once. We must make sure that we always | |
673 // use the latest registered method -> check if a stub already has been generated. | |
674 // If so, we have to make it not_entrant. | |
675 nmethod* nm = code(); // Put it into local variable to guard against concurrent updates | |
676 if (nm != NULL) { | |
677 nm->make_not_entrant(); | |
678 } | |
679 } | |
680 | |
681 | |
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682 bool Method::has_native_function() const { |
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683 if (is_method_handle_intrinsic()) |
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684 return false; // special-cased in SharedRuntime::generate_native_wrapper |
0 | 685 address func = native_function(); |
686 return (func != NULL && func != SharedRuntime::native_method_throw_unsatisfied_link_error_entry()); | |
687 } | |
688 | |
689 | |
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690 void Method::clear_native_function() { |
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691 // Note: is_method_handle_intrinsic() is allowed here. |
0 | 692 set_native_function( |
693 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
694 !native_bind_event_is_interesting); | |
695 clear_code(); | |
696 } | |
697 | |
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698 address Method::critical_native_function() { |
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699 methodHandle mh(this); |
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700 return NativeLookup::lookup_critical_entry(mh); |
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701 } |
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702 |
0 | 703 |
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704 void Method::set_signature_handler(address handler) { |
0 | 705 address* signature_handler = signature_handler_addr(); |
706 *signature_handler = handler; | |
707 } | |
708 | |
709 | |
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710 void Method::print_made_not_compilable(int comp_level, bool is_osr, bool report) { |
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711 if (PrintCompilation && report) { |
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712 ttyLocker ttyl; |
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713 tty->print("made not %scompilable on ", is_osr ? "OSR " : ""); |
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714 if (comp_level == CompLevel_all) { |
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715 tty->print("all levels "); |
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716 } else { |
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717 tty->print("levels "); |
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718 for (int i = (int)CompLevel_none; i <= comp_level; i++) { |
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719 tty->print("%d ", i); |
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720 } |
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721 } |
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722 this->print_short_name(tty); |
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723 int size = this->code_size(); |
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724 if (size > 0) |
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725 tty->print(" (%d bytes)", size); |
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726 tty->cr(); |
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727 } |
0 | 728 if ((TraceDeoptimization || LogCompilation) && (xtty != NULL)) { |
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729 ResourceMark rm; |
0 | 730 ttyLocker ttyl; |
6843 | 731 xtty->begin_elem("make_not_%scompilable thread='" UINTX_FORMAT "'", |
732 is_osr ? "osr_" : "", os::current_thread_id()); | |
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733 xtty->method(this); |
0 | 734 xtty->stamp(); |
735 xtty->end_elem(); | |
736 } | |
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737 } |
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738 |
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739 bool Method::is_not_compilable(int comp_level) const { |
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740 if (number_of_breakpoints() > 0) |
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741 return true; |
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742 if (is_method_handle_intrinsic()) |
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743 return !is_synthetic(); // the generated adapters must be compiled |
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744 if (comp_level == CompLevel_any) |
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745 return is_not_c1_compilable() || is_not_c2_compilable(); |
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746 if (is_c1_compile(comp_level)) |
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747 return is_not_c1_compilable(); |
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748 if (is_c2_compile(comp_level)) |
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749 return is_not_c2_compilable(); |
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750 return false; |
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751 } |
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752 |
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753 // call this when compiler finds that this method is not compilable |
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754 void Method::set_not_compilable(int comp_level, bool report) { |
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755 print_made_not_compilable(comp_level, /*is_osr*/ false, report); |
1783 | 756 if (comp_level == CompLevel_all) { |
757 set_not_c1_compilable(); | |
758 set_not_c2_compilable(); | |
759 } else { | |
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760 if (is_c1_compile(comp_level)) |
1783 | 761 set_not_c1_compilable(); |
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762 if (is_c2_compile(comp_level)) |
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763 set_not_c2_compilable(); |
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764 } |
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765 CompilationPolicy::policy()->disable_compilation(this); |
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766 } |
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767 |
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768 bool Method::is_not_osr_compilable(int comp_level) const { |
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769 if (is_not_compilable(comp_level)) |
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770 return true; |
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771 if (comp_level == CompLevel_any) |
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772 return is_not_c1_osr_compilable() || is_not_c2_osr_compilable(); |
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773 if (is_c1_compile(comp_level)) |
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774 return is_not_c1_osr_compilable(); |
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775 if (is_c2_compile(comp_level)) |
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776 return is_not_c2_osr_compilable(); |
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777 return false; |
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778 } |
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779 |
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780 void Method::set_not_osr_compilable(int comp_level, bool report) { |
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781 print_made_not_compilable(comp_level, /*is_osr*/ true, report); |
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782 if (comp_level == CompLevel_all) { |
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783 set_not_c1_osr_compilable(); |
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784 set_not_c2_osr_compilable(); |
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785 } else { |
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786 if (is_c1_compile(comp_level)) |
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787 set_not_c1_osr_compilable(); |
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788 if (is_c2_compile(comp_level)) |
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789 set_not_c2_osr_compilable(); |
0 | 790 } |
1783 | 791 CompilationPolicy::policy()->disable_compilation(this); |
0 | 792 } |
793 | |
794 // Revert to using the interpreter and clear out the nmethod | |
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795 void Method::clear_code() { |
0 | 796 |
797 // this may be NULL if c2i adapters have not been made yet | |
798 // Only should happen at allocate time. | |
799 if (_adapter == NULL) { | |
800 _from_compiled_entry = NULL; | |
801 } else { | |
802 _from_compiled_entry = _adapter->get_c2i_entry(); | |
803 } | |
804 OrderAccess::storestore(); | |
805 _from_interpreted_entry = _i2i_entry; | |
806 OrderAccess::storestore(); | |
807 _code = NULL; | |
808 } | |
809 | |
810 // Called by class data sharing to remove any entry points (which are not shared) | |
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811 void Method::unlink_method() { |
0 | 812 _code = NULL; |
813 _i2i_entry = NULL; | |
814 _from_interpreted_entry = NULL; | |
815 if (is_native()) { | |
816 *native_function_addr() = NULL; | |
817 set_signature_handler(NULL); | |
818 } | |
819 NOT_PRODUCT(set_compiled_invocation_count(0);) | |
820 invocation_counter()->reset(); | |
821 backedge_counter()->reset(); | |
822 _adapter = NULL; | |
823 _from_compiled_entry = NULL; | |
824 assert(_method_data == NULL, "unexpected method data?"); | |
825 set_method_data(NULL); | |
826 set_interpreter_throwout_count(0); | |
827 set_interpreter_invocation_count(0); | |
828 } | |
829 | |
830 // Called when the method_holder is getting linked. Setup entrypoints so the method | |
831 // is ready to be called from interpreter, compiler, and vtables. | |
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832 void Method::link_method(methodHandle h_method, TRAPS) { |
3404 | 833 // If the code cache is full, we may reenter this function for the |
834 // leftover methods that weren't linked. | |
835 if (_i2i_entry != NULL) return; | |
836 | |
0 | 837 assert(_adapter == NULL, "init'd to NULL" ); |
838 assert( _code == NULL, "nothing compiled yet" ); | |
839 | |
840 // Setup interpreter entrypoint | |
841 assert(this == h_method(), "wrong h_method()" ); | |
842 address entry = Interpreter::entry_for_method(h_method); | |
843 assert(entry != NULL, "interpreter entry must be non-null"); | |
844 // Sets both _i2i_entry and _from_interpreted_entry | |
845 set_interpreter_entry(entry); | |
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846 if (is_native() && !is_method_handle_intrinsic()) { |
0 | 847 set_native_function( |
848 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
849 !native_bind_event_is_interesting); | |
850 } | |
851 | |
852 // Setup compiler entrypoint. This is made eagerly, so we do not need | |
853 // special handling of vtables. An alternative is to make adapters more | |
854 // lazily by calling make_adapter() from from_compiled_entry() for the | |
855 // normal calls. For vtable calls life gets more complicated. When a | |
856 // call-site goes mega-morphic we need adapters in all methods which can be | |
857 // called from the vtable. We need adapters on such methods that get loaded | |
858 // later. Ditto for mega-morphic itable calls. If this proves to be a | |
859 // problem we'll make these lazily later. | |
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860 (void) make_adapters(h_method, CHECK); |
0 | 861 |
862 // ONLY USE the h_method now as make_adapter may have blocked | |
863 | |
864 } | |
865 | |
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866 address Method::make_adapters(methodHandle mh, TRAPS) { |
0 | 867 // Adapters for compiled code are made eagerly here. They are fairly |
868 // small (generally < 100 bytes) and quick to make (and cached and shared) | |
869 // so making them eagerly shouldn't be too expensive. | |
870 AdapterHandlerEntry* adapter = AdapterHandlerLibrary::get_adapter(mh); | |
871 if (adapter == NULL ) { | |
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872 THROW_MSG_NULL(vmSymbols::java_lang_VirtualMachineError(), "out of space in CodeCache for adapters"); |
0 | 873 } |
874 | |
875 mh->set_adapter_entry(adapter); | |
876 mh->_from_compiled_entry = adapter->get_c2i_entry(); | |
877 return adapter->get_c2i_entry(); | |
878 } | |
879 | |
880 // The verified_code_entry() must be called when a invoke is resolved | |
881 // on this method. | |
882 | |
883 // It returns the compiled code entry point, after asserting not null. | |
884 // This function is called after potential safepoints so that nmethod | |
885 // or adapter that it points to is still live and valid. | |
886 // This function must not hit a safepoint! | |
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887 address Method::verified_code_entry() { |
0 | 888 debug_only(No_Safepoint_Verifier nsv;) |
1202 | 889 nmethod *code = (nmethod *)OrderAccess::load_ptr_acquire(&_code); |
890 if (code == NULL && UseCodeCacheFlushing) { | |
891 nmethod *saved_code = CodeCache::find_and_remove_saved_code(this); | |
892 if (saved_code != NULL) { | |
893 methodHandle method(this); | |
894 assert( ! saved_code->is_osr_method(), "should not get here for osr" ); | |
895 set_code( method, saved_code ); | |
896 } | |
897 } | |
898 | |
0 | 899 assert(_from_compiled_entry != NULL, "must be set"); |
900 return _from_compiled_entry; | |
901 } | |
902 | |
903 // Check that if an nmethod ref exists, it has a backlink to this or no backlink at all | |
904 // (could be racing a deopt). | |
905 // Not inline to avoid circular ref. | |
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906 bool Method::check_code() const { |
0 | 907 // cached in a register or local. There's a race on the value of the field. |
908 nmethod *code = (nmethod *)OrderAccess::load_ptr_acquire(&_code); | |
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909 return code == NULL || (code->method() == NULL) || (code->method() == (Method*)this && !code->is_osr_method()); |
0 | 910 } |
911 | |
912 // Install compiled code. Instantly it can execute. | |
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913 void Method::set_code(methodHandle mh, nmethod *code) { |
0 | 914 assert( code, "use clear_code to remove code" ); |
915 assert( mh->check_code(), "" ); | |
916 | |
917 guarantee(mh->adapter() != NULL, "Adapter blob must already exist!"); | |
918 | |
919 // These writes must happen in this order, because the interpreter will | |
920 // directly jump to from_interpreted_entry which jumps to an i2c adapter | |
921 // which jumps to _from_compiled_entry. | |
922 mh->_code = code; // Assign before allowing compiled code to exec | |
923 | |
924 int comp_level = code->comp_level(); | |
925 // In theory there could be a race here. In practice it is unlikely | |
926 // and not worth worrying about. | |
1783 | 927 if (comp_level > mh->highest_comp_level()) { |
928 mh->set_highest_comp_level(comp_level); | |
0 | 929 } |
930 | |
931 OrderAccess::storestore(); | |
1692 | 932 #ifdef SHARK |
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933 mh->_from_interpreted_entry = code->insts_begin(); |
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934 #else //!SHARK |
0 | 935 mh->_from_compiled_entry = code->verified_entry_point(); |
936 OrderAccess::storestore(); | |
937 // Instantly compiled code can execute. | |
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938 if (!mh->is_method_handle_intrinsic()) |
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939 mh->_from_interpreted_entry = mh->get_i2c_entry(); |
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940 #endif //!SHARK |
0 | 941 } |
942 | |
943 | |
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944 bool Method::is_overridden_in(Klass* k) const { |
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945 InstanceKlass* ik = InstanceKlass::cast(k); |
0 | 946 |
947 if (ik->is_interface()) return false; | |
948 | |
949 // If method is an interface, we skip it - except if it | |
950 // is a miranda method | |
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951 if (method_holder()->is_interface()) { |
0 | 952 // Check that method is not a miranda method |
953 if (ik->lookup_method(name(), signature()) == NULL) { | |
954 // No implementation exist - so miranda method | |
955 return false; | |
956 } | |
957 return true; | |
958 } | |
959 | |
960 assert(ik->is_subclass_of(method_holder()), "should be subklass"); | |
961 assert(ik->vtable() != NULL, "vtable should exist"); | |
962 if (vtable_index() == nonvirtual_vtable_index) { | |
963 return false; | |
964 } else { | |
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965 Method* vt_m = ik->method_at_vtable(vtable_index()); |
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966 return vt_m != this; |
0 | 967 } |
968 } | |
969 | |
970 | |
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971 // give advice about whether this Method* should be cached or not |
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972 bool Method::should_not_be_cached() const { |
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973 if (is_old()) { |
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974 // This method has been redefined. It is either EMCP or obsolete |
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975 // and we don't want to cache it because that would pin the method |
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976 // down and prevent it from being collectible if and when it |
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977 // finishes executing. |
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978 return true; |
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979 } |
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980 |
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981 // caching this method should be just fine |
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982 return false; |
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983 } |
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984 |
710 | 985 // Constant pool structure for invoke methods: |
986 enum { | |
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987 _imcp_invoke_name = 1, // utf8: 'invokeExact', etc. |
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988 _imcp_invoke_signature, // utf8: (variable Symbol*) |
710 | 989 _imcp_limit |
990 }; | |
991 | |
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992 // Test if this method is an MH adapter frame generated by Java code. |
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993 // Cf. java/lang/invoke/InvokerBytecodeGenerator |
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994 bool Method::is_compiled_lambda_form() const { |
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995 return intrinsic_id() == vmIntrinsics::_compiledLambdaForm; |
710 | 996 } |
997 | |
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998 // Test if this method is an internal MH primitive method. |
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999 bool Method::is_method_handle_intrinsic() const { |
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1000 vmIntrinsics::ID iid = intrinsic_id(); |
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1001 return (MethodHandles::is_signature_polymorphic(iid) && |
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1002 MethodHandles::is_signature_polymorphic_intrinsic(iid)); |
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1003 } |
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1004 |
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1005 bool Method::has_member_arg() const { |
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1006 vmIntrinsics::ID iid = intrinsic_id(); |
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1007 return (MethodHandles::is_signature_polymorphic(iid) && |
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1008 MethodHandles::has_member_arg(iid)); |
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1009 } |
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1010 |
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1011 // Make an instance of a signature-polymorphic internal MH primitive. |
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1012 methodHandle Method::make_method_handle_intrinsic(vmIntrinsics::ID iid, |
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1013 Symbol* signature, |
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1014 TRAPS) { |
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1015 ResourceMark rm; |
710 | 1016 methodHandle empty; |
1017 | |
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1018 KlassHandle holder = SystemDictionary::MethodHandle_klass(); |
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1019 Symbol* name = MethodHandles::signature_polymorphic_intrinsic_name(iid); |
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1020 assert(iid == MethodHandles::signature_polymorphic_name_id(name), ""); |
710 | 1021 if (TraceMethodHandles) { |
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1022 tty->print_cr("make_method_handle_intrinsic MH.%s%s", name->as_C_string(), signature->as_C_string()); |
710 | 1023 } |
1024 | |
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1025 // invariant: cp->symbol_at_put is preceded by a refcount increment (more usually a lookup) |
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1026 name->increment_refcount(); |
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1027 signature->increment_refcount(); |
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1028 |
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1029 int cp_length = _imcp_limit; |
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1030 ClassLoaderData* loader_data = holder->class_loader_data(); |
710 | 1031 constantPoolHandle cp; |
1032 { | |
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1033 ConstantPool* cp_oop = ConstantPool::allocate(loader_data, cp_length, CHECK_(empty)); |
710 | 1034 cp = constantPoolHandle(THREAD, cp_oop); |
1035 } | |
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1036 cp->set_pool_holder(InstanceKlass::cast(holder())); |
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1037 cp->symbol_at_put(_imcp_invoke_name, name); |
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1038 cp->symbol_at_put(_imcp_invoke_signature, signature); |
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1039 cp->set_preresolution(); |
710 | 1040 |
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1041 // decide on access bits: public or not? |
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1042 int flags_bits = (JVM_ACC_NATIVE | JVM_ACC_SYNTHETIC | JVM_ACC_FINAL); |
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1043 bool must_be_static = MethodHandles::is_signature_polymorphic_static(iid); |
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1044 if (must_be_static) flags_bits |= JVM_ACC_STATIC; |
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1045 assert((flags_bits & JVM_ACC_PUBLIC) == 0, "do not expose these methods"); |
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1046 |
710 | 1047 methodHandle m; |
1048 { | |
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1049 Method* m_oop = Method::allocate(loader_data, 0, |
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1050 accessFlags_from(flags_bits), |
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1051 0, 0, 0, 0, 0, 0, |
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1052 ConstMethod::NORMAL, CHECK_(empty)); |
710 | 1053 m = methodHandle(THREAD, m_oop); |
1054 } | |
1055 m->set_constants(cp()); | |
1056 m->set_name_index(_imcp_invoke_name); | |
1057 m->set_signature_index(_imcp_invoke_signature); | |
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1058 assert(MethodHandles::is_signature_polymorphic_name(m->name()), ""); |
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1059 assert(m->signature() == signature, ""); |
710 | 1060 #ifdef CC_INTERP |
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1061 ResultTypeFinder rtf(signature); |
710 | 1062 m->set_result_index(rtf.type()); |
1063 #endif | |
1064 m->compute_size_of_parameters(THREAD); | |
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1065 m->init_intrinsic_id(); |
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1066 assert(m->is_method_handle_intrinsic(), ""); |
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1067 #ifdef ASSERT |
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1068 if (!MethodHandles::is_signature_polymorphic(m->intrinsic_id())) m->print(); |
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1069 assert(MethodHandles::is_signature_polymorphic(m->intrinsic_id()), "must be an invoker"); |
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1070 assert(m->intrinsic_id() == iid, "correctly predicted iid"); |
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1071 #endif //ASSERT |
710 | 1072 |
1073 // Finally, set up its entry points. | |
1074 assert(m->can_be_statically_bound(), ""); | |
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1075 m->set_vtable_index(Method::nonvirtual_vtable_index); |
710 | 1076 m->link_method(m, CHECK_(empty)); |
1077 | |
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1078 if (TraceMethodHandles && (Verbose || WizardMode)) |
710 | 1079 m->print_on(tty); |
1080 | |
1081 return m; | |
1082 } | |
1083 | |
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1084 Klass* Method::check_non_bcp_klass(Klass* klass) { |
6983 | 1085 if (klass != NULL && klass->class_loader() != NULL) { |
1086 if (klass->oop_is_objArray()) | |
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1087 klass = ObjArrayKlass::cast(klass)->bottom_klass(); |
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1088 return klass; |
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1089 } |
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1090 return NULL; |
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1091 } |
710 | 1092 |
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1093 |
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1094 methodHandle Method::clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length, |
0 | 1095 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS) { |
1096 // Code below does not work for native methods - they should never get rewritten anyway | |
1097 assert(!m->is_native(), "cannot rewrite native methods"); | |
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1098 // Allocate new Method* |
0 | 1099 AccessFlags flags = m->access_flags(); |
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1100 u2 generic_signature_index = m->generic_signature_index(); |
0 | 1101 int checked_exceptions_len = m->checked_exceptions_length(); |
1102 int localvariable_len = m->localvariable_table_length(); | |
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1103 int exception_table_len = m->exception_table_length(); |
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1104 int method_parameters_len = m->method_parameters_length(); |
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1105 |
6934 | 1106 ClassLoaderData* loader_data = m->method_holder()->class_loader_data(); |
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1107 Method* newm_oop = Method::allocate(loader_data, |
6934 | 1108 new_code_length, |
1109 flags, | |
1110 new_compressed_linenumber_size, | |
1111 localvariable_len, | |
1112 exception_table_len, | |
1113 checked_exceptions_len, | |
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1114 method_parameters_len, |
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1115 generic_signature_index, |
6934 | 1116 m->method_type(), |
1117 CHECK_(methodHandle())); | |
0 | 1118 methodHandle newm (THREAD, newm_oop); |
1119 int new_method_size = newm->method_size(); | |
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1120 |
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1121 // Create a shallow copy of Method part, but be careful to preserve the new ConstMethod* |
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1122 ConstMethod* newcm = newm->constMethod(); |
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1123 int new_const_method_size = newm->constMethod()->size(); |
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1124 |
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1125 memcpy(newm(), m(), sizeof(Method)); |
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1126 |
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1127 // Create shallow copy of ConstMethod. |
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1128 memcpy(newcm, m->constMethod(), sizeof(ConstMethod)); |
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1129 |
0 | 1130 // Reset correct method/const method, method size, and parameter info |
1131 newm->set_constMethod(newcm); | |
1132 newm->constMethod()->set_code_size(new_code_length); | |
1133 newm->constMethod()->set_constMethod_size(new_const_method_size); | |
1134 newm->set_method_size(new_method_size); | |
1135 assert(newm->code_size() == new_code_length, "check"); | |
1136 assert(newm->checked_exceptions_length() == checked_exceptions_len, "check"); | |
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1137 assert(newm->exception_table_length() == exception_table_len, "check"); |
0 | 1138 assert(newm->localvariable_table_length() == localvariable_len, "check"); |
1139 // Copy new byte codes | |
1140 memcpy(newm->code_base(), new_code, new_code_length); | |
1141 // Copy line number table | |
1142 if (new_compressed_linenumber_size > 0) { | |
1143 memcpy(newm->compressed_linenumber_table(), | |
1144 new_compressed_linenumber_table, | |
1145 new_compressed_linenumber_size); | |
1146 } | |
1147 // Copy checked_exceptions | |
1148 if (checked_exceptions_len > 0) { | |
1149 memcpy(newm->checked_exceptions_start(), | |
1150 m->checked_exceptions_start(), | |
1151 checked_exceptions_len * sizeof(CheckedExceptionElement)); | |
1152 } | |
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1153 // Copy exception table |
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1154 if (exception_table_len > 0) { |
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1155 memcpy(newm->exception_table_start(), |
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1156 m->exception_table_start(), |
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1157 exception_table_len * sizeof(ExceptionTableElement)); |
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1158 } |
0 | 1159 // Copy local variable number table |
1160 if (localvariable_len > 0) { | |
1161 memcpy(newm->localvariable_table_start(), | |
1162 m->localvariable_table_start(), | |
1163 localvariable_len * sizeof(LocalVariableTableElement)); | |
1164 } | |
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1165 // Copy stackmap table |
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1166 if (m->has_stackmap_table()) { |
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1167 int code_attribute_length = m->stackmap_data()->length(); |
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1168 Array<u1>* stackmap_data = |
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1169 MetadataFactory::new_array<u1>(loader_data, code_attribute_length, 0, CHECK_NULL); |
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1170 memcpy((void*)stackmap_data->adr_at(0), |
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1171 (void*)m->stackmap_data()->adr_at(0), code_attribute_length); |
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1172 newm->set_stackmap_data(stackmap_data); |
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1173 } |
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1174 |
0 | 1175 return newm; |
1176 } | |
1177 | |
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1178 vmSymbols::SID Method::klass_id_for_intrinsics(Klass* holder) { |
0 | 1179 // if loader is not the default loader (i.e., != NULL), we can't know the intrinsics |
1180 // because we are not loading from core libraries | |
6894 | 1181 // exception: the AES intrinsics come from lib/ext/sunjce_provider.jar |
1182 // which does not use the class default class loader so we check for its loader here | |
1183 if ((InstanceKlass::cast(holder)->class_loader() != NULL) && | |
1184 InstanceKlass::cast(holder)->class_loader()->klass()->name() != vmSymbols::sun_misc_Launcher_ExtClassLoader()) { | |
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1185 return vmSymbols::NO_SID; // regardless of name, no intrinsics here |
6894 | 1186 } |
0 | 1187 |
1188 // see if the klass name is well-known: | |
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1189 Symbol* klass_name = InstanceKlass::cast(holder)->name(); |
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1190 return vmSymbols::find_sid(klass_name); |
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1191 } |
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1192 |
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1193 void Method::init_intrinsic_id() { |
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1194 assert(_intrinsic_id == vmIntrinsics::_none, "do this just once"); |
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1195 const uintptr_t max_id_uint = right_n_bits((int)(sizeof(_intrinsic_id) * BitsPerByte)); |
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1196 assert((uintptr_t)vmIntrinsics::ID_LIMIT <= max_id_uint, "else fix size"); |
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1197 assert(intrinsic_id_size_in_bytes() == sizeof(_intrinsic_id), ""); |
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1198 |
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1199 // the klass name is well-known: |
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1200 vmSymbols::SID klass_id = klass_id_for_intrinsics(method_holder()); |
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1201 assert(klass_id != vmSymbols::NO_SID, "caller responsibility"); |
0 | 1202 |
1203 // ditto for method and signature: | |
1204 vmSymbols::SID name_id = vmSymbols::find_sid(name()); | |
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1205 if (klass_id != vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_MethodHandle) |
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1206 && name_id == vmSymbols::NO_SID) |
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1207 return; |
0 | 1208 vmSymbols::SID sig_id = vmSymbols::find_sid(signature()); |
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1209 if (klass_id != vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_MethodHandle) |
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1210 && sig_id == vmSymbols::NO_SID) return; |
0 | 1211 jshort flags = access_flags().as_short(); |
1212 | |
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1213 vmIntrinsics::ID id = vmIntrinsics::find_id(klass_id, name_id, sig_id, flags); |
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1214 if (id != vmIntrinsics::_none) { |
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1215 set_intrinsic_id(id); |
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1216 return; |
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1217 } |
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1218 |
0 | 1219 // A few slightly irregular cases: |
1220 switch (klass_id) { | |
1221 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_StrictMath): | |
1222 // Second chance: check in regular Math. | |
1223 switch (name_id) { | |
1224 case vmSymbols::VM_SYMBOL_ENUM_NAME(min_name): | |
1225 case vmSymbols::VM_SYMBOL_ENUM_NAME(max_name): | |
1226 case vmSymbols::VM_SYMBOL_ENUM_NAME(sqrt_name): | |
1227 // pretend it is the corresponding method in the non-strict class: | |
1228 klass_id = vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_Math); | |
856
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1229 id = vmIntrinsics::find_id(klass_id, name_id, sig_id, flags); |
0 | 1230 break; |
1231 } | |
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1232 break; |
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1233 |
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1234 // Signature-polymorphic methods: MethodHandle.invoke*, InvokeDynamic.*. |
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1235 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_MethodHandle): |
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1236 if (!is_native()) break; |
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1237 id = MethodHandles::signature_polymorphic_name_id(method_holder(), name()); |
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1238 if (is_static() != MethodHandles::is_signature_polymorphic_static(id)) |
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1239 id = vmIntrinsics::_none; |
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1240 break; |
0 | 1241 } |
1242 | |
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1243 if (id != vmIntrinsics::_none) { |
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1244 // Set up its iid. It is an alias method. |
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1245 set_intrinsic_id(id); |
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1246 return; |
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1247 } |
0 | 1248 } |
1249 | |
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1250 // These two methods are static since a GC may move the Method |
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1251 bool Method::load_signature_classes(methodHandle m, TRAPS) { |
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1252 if (THREAD->is_Compiler_thread()) { |
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1253 // There is nothing useful this routine can do from within the Compile thread. |
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1254 // Hopefully, the signature contains only well-known classes. |
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1255 // We could scan for this and return true/false, but the caller won't care. |
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1256 return false; |
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1257 } |
0 | 1258 bool sig_is_loaded = true; |
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1259 Handle class_loader(THREAD, m->method_holder()->class_loader()); |
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1260 Handle protection_domain(THREAD, m->method_holder()->protection_domain()); |
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1261 ResourceMark rm(THREAD); |
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1262 Symbol* signature = m->signature(); |
0 | 1263 for(SignatureStream ss(signature); !ss.is_done(); ss.next()) { |
1264 if (ss.is_object()) { | |
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1265 Symbol* sym = ss.as_symbol(CHECK_(false)); |
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1266 Symbol* name = sym; |
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1267 Klass* klass = SystemDictionary::resolve_or_null(name, class_loader, |
0 | 1268 protection_domain, THREAD); |
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1269 // We are loading classes eagerly. If a ClassNotFoundException or |
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1270 // a LinkageError was generated, be sure to ignore it. |
0 | 1271 if (HAS_PENDING_EXCEPTION) { |
1142 | 1272 if (PENDING_EXCEPTION->is_a(SystemDictionary::ClassNotFoundException_klass()) || |
1273 PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) { | |
0 | 1274 CLEAR_PENDING_EXCEPTION; |
1275 } else { | |
1276 return false; | |
1277 } | |
1278 } | |
1279 if( klass == NULL) { sig_is_loaded = false; } | |
1280 } | |
1281 } | |
1282 return sig_is_loaded; | |
1283 } | |
1284 | |
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1285 bool Method::has_unloaded_classes_in_signature(methodHandle m, TRAPS) { |
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1286 Handle class_loader(THREAD, m->method_holder()->class_loader()); |
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1287 Handle protection_domain(THREAD, m->method_holder()->protection_domain()); |
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1288 ResourceMark rm(THREAD); |
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1289 Symbol* signature = m->signature(); |
0 | 1290 for(SignatureStream ss(signature); !ss.is_done(); ss.next()) { |
1291 if (ss.type() == T_OBJECT) { | |
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1292 Symbol* name = ss.as_symbol_or_null(); |
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1293 if (name == NULL) return true; |
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1294 Klass* klass = SystemDictionary::find(name, class_loader, protection_domain, THREAD); |
0 | 1295 if (klass == NULL) return true; |
1296 } | |
1297 } | |
1298 return false; | |
1299 } | |
1300 | |
1301 // Exposed so field engineers can debug VM | |
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1302 void Method::print_short_name(outputStream* st) { |
0 | 1303 ResourceMark rm; |
1304 #ifdef PRODUCT | |
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1305 st->print(" %s::", method_holder()->external_name()); |
0 | 1306 #else |
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1307 st->print(" %s::", method_holder()->internal_name()); |
0 | 1308 #endif |
1309 name()->print_symbol_on(st); | |
1310 if (WizardMode) signature()->print_symbol_on(st); | |
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1311 else if (MethodHandles::is_signature_polymorphic(intrinsic_id())) |
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1312 MethodHandles::print_as_basic_type_signature_on(st, signature(), true); |
0 | 1313 } |
1314 | |
1315 // This is only done during class loading, so it is OK to assume method_idnum matches the methods() array | |
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1316 static void reorder_based_on_method_index(Array<Method*>* methods, |
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1317 Array<AnnotationArray*>* annotations, |
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1318 GrowableArray<AnnotationArray*>* temp_array) { |
0 | 1319 if (annotations == NULL) { |
1320 return; | |
1321 } | |
1322 | |
1323 int length = methods->length(); | |
1324 int i; | |
1325 // Copy to temp array | |
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1326 temp_array->clear(); |
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1327 for (i = 0; i < length; i++) { |
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1328 temp_array->append(annotations->at(i)); |
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1329 } |
0 | 1330 |
1331 // Copy back using old method indices | |
1332 for (i = 0; i < length; i++) { | |
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1333 Method* m = methods->at(i); |
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1334 annotations->at_put(i, temp_array->at(m->method_idnum())); |
0 | 1335 } |
1336 } | |
1337 | |
3779 | 1338 // Comparer for sorting an object array containing |
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1339 // Method*s. |
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1340 static int method_comparator(Method* a, Method* b) { |
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1341 return a->name()->fast_compare(b->name()); |
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1342 } |
0 | 1343 |
1344 // This is only done during class loading, so it is OK to assume method_idnum matches the methods() array | |
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1345 void Method::sort_methods(Array<Method*>* methods, |
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1346 Array<AnnotationArray*>* methods_annotations, |
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1347 Array<AnnotationArray*>* methods_parameter_annotations, |
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1348 Array<AnnotationArray*>* methods_default_annotations, |
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1349 Array<AnnotationArray*>* methods_type_annotations, |
0 | 1350 bool idempotent) { |
1351 int length = methods->length(); | |
1352 if (length > 1) { | |
1353 bool do_annotations = false; | |
1354 if (methods_annotations != NULL || | |
1355 methods_parameter_annotations != NULL || | |
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1356 methods_default_annotations != NULL || |
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1357 methods_type_annotations != NULL) { |
0 | 1358 do_annotations = true; |
1359 } | |
1360 if (do_annotations) { | |
1361 // Remember current method ordering so we can reorder annotations | |
1362 for (int i = 0; i < length; i++) { | |
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1363 Method* m = methods->at(i); |
0 | 1364 m->set_method_idnum(i); |
1365 } | |
1366 } | |
3779 | 1367 { |
1368 No_Safepoint_Verifier nsv; | |
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1369 QuickSort::sort<Method*>(methods->data(), length, method_comparator, idempotent); |
0 | 1370 } |
1371 | |
1372 // Sort annotations if necessary | |
1373 assert(methods_annotations == NULL || methods_annotations->length() == methods->length(), ""); | |
1374 assert(methods_parameter_annotations == NULL || methods_parameter_annotations->length() == methods->length(), ""); | |
1375 assert(methods_default_annotations == NULL || methods_default_annotations->length() == methods->length(), ""); | |
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1376 assert(methods_type_annotations == NULL || methods_type_annotations->length() == methods->length(), ""); |
0 | 1377 if (do_annotations) { |
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1378 ResourceMark rm; |
0 | 1379 // Allocate temporary storage |
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1380 GrowableArray<AnnotationArray*>* temp_array = new GrowableArray<AnnotationArray*>(length); |
0 | 1381 reorder_based_on_method_index(methods, methods_annotations, temp_array); |
1382 reorder_based_on_method_index(methods, methods_parameter_annotations, temp_array); | |
1383 reorder_based_on_method_index(methods, methods_default_annotations, temp_array); | |
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1384 reorder_based_on_method_index(methods, methods_type_annotations, temp_array); |
0 | 1385 } |
1386 | |
1387 // Reset method ordering | |
1388 for (int i = 0; i < length; i++) { | |
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1389 Method* m = methods->at(i); |
0 | 1390 m->set_method_idnum(i); |
1391 } | |
1392 } | |
1393 } | |
1394 | |
1395 | |
1396 //----------------------------------------------------------------------------------- | |
1397 // Non-product code | |
1398 | |
1399 #ifndef PRODUCT | |
1400 class SignatureTypePrinter : public SignatureTypeNames { | |
1401 private: | |
1402 outputStream* _st; | |
1403 bool _use_separator; | |
1404 | |
1405 void type_name(const char* name) { | |
1406 if (_use_separator) _st->print(", "); | |
1407 _st->print(name); | |
1408 _use_separator = true; | |
1409 } | |
1410 | |
1411 public: | |
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1412 SignatureTypePrinter(Symbol* signature, outputStream* st) : SignatureTypeNames(signature) { |
0 | 1413 _st = st; |
1414 _use_separator = false; | |
1415 } | |
1416 | |
1417 void print_parameters() { _use_separator = false; iterate_parameters(); } | |
1418 void print_returntype() { _use_separator = false; iterate_returntype(); } | |
1419 }; | |
1420 | |
1421 | |
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1422 void Method::print_name(outputStream* st) { |
0 | 1423 Thread *thread = Thread::current(); |
1424 ResourceMark rm(thread); | |
1425 SignatureTypePrinter sig(signature(), st); | |
1426 st->print("%s ", is_static() ? "static" : "virtual"); | |
1427 sig.print_returntype(); | |
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1428 st->print(" %s.", method_holder()->internal_name()); |
0 | 1429 name()->print_symbol_on(st); |
1430 st->print("("); | |
1431 sig.print_parameters(); | |
1432 st->print(")"); | |
1433 } | |
1434 | |
1435 | |
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1436 void Method::print_codes_on(outputStream* st) const { |
0 | 1437 print_codes_on(0, code_size(), st); |
1438 } | |
1439 | |
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1440 void Method::print_codes_on(int from, int to, outputStream* st) const { |
0 | 1441 Thread *thread = Thread::current(); |
1442 ResourceMark rm(thread); | |
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1443 methodHandle mh (thread, (Method*)this); |
0 | 1444 BytecodeStream s(mh); |
1445 s.set_interval(from, to); | |
1446 BytecodeTracer::set_closure(BytecodeTracer::std_closure()); | |
1447 while (s.next() >= 0) BytecodeTracer::trace(mh, s.bcp(), st); | |
1448 } | |
1449 #endif // not PRODUCT | |
1450 | |
1451 | |
1452 // Simple compression of line number tables. We use a regular compressed stream, except that we compress deltas | |
1453 // between (bci,line) pairs since they are smaller. If (bci delta, line delta) fits in (5-bit unsigned, 3-bit unsigned) | |
1454 // we save it as one byte, otherwise we write a 0xFF escape character and use regular compression. 0x0 is used | |
1455 // as end-of-stream terminator. | |
1456 | |
1457 void CompressedLineNumberWriteStream::write_pair_regular(int bci_delta, int line_delta) { | |
1458 // bci and line number does not compress into single byte. | |
1459 // Write out escape character and use regular compression for bci and line number. | |
1460 write_byte((jubyte)0xFF); | |
1461 write_signed_int(bci_delta); | |
1462 write_signed_int(line_delta); | |
1463 } | |
1464 | |
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1465 // See comment in method.hpp which explains why this exists. |
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1466 #if defined(_M_AMD64) && _MSC_VER >= 1400 |
0 | 1467 #pragma optimize("", off) |
1468 void CompressedLineNumberWriteStream::write_pair(int bci, int line) { | |
1469 write_pair_inline(bci, line); | |
1470 } | |
1471 #pragma optimize("", on) | |
1472 #endif | |
1473 | |
1474 CompressedLineNumberReadStream::CompressedLineNumberReadStream(u_char* buffer) : CompressedReadStream(buffer) { | |
1475 _bci = 0; | |
1476 _line = 0; | |
1477 }; | |
1478 | |
1479 | |
1480 bool CompressedLineNumberReadStream::read_pair() { | |
1481 jubyte next = read_byte(); | |
1482 // Check for terminator | |
1483 if (next == 0) return false; | |
1484 if (next == 0xFF) { | |
1485 // Escape character, regular compression used | |
1486 _bci += read_signed_int(); | |
1487 _line += read_signed_int(); | |
1488 } else { | |
1489 // Single byte compression used | |
1490 _bci += next >> 3; | |
1491 _line += next & 0x7; | |
1492 } | |
1493 return true; | |
1494 } | |
1495 | |
1496 | |
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1497 Bytecodes::Code Method::orig_bytecode_at(int bci) const { |
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1498 BreakpointInfo* bp = method_holder()->breakpoints(); |
0 | 1499 for (; bp != NULL; bp = bp->next()) { |
1500 if (bp->match(this, bci)) { | |
1501 return bp->orig_bytecode(); | |
1502 } | |
1503 } | |
1504 ShouldNotReachHere(); | |
1505 return Bytecodes::_shouldnotreachhere; | |
1506 } | |
1507 | |
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1508 void Method::set_orig_bytecode_at(int bci, Bytecodes::Code code) { |
0 | 1509 assert(code != Bytecodes::_breakpoint, "cannot patch breakpoints this way"); |
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1510 BreakpointInfo* bp = method_holder()->breakpoints(); |
0 | 1511 for (; bp != NULL; bp = bp->next()) { |
1512 if (bp->match(this, bci)) { | |
1513 bp->set_orig_bytecode(code); | |
1514 // and continue, in case there is more than one | |
1515 } | |
1516 } | |
1517 } | |
1518 | |
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1519 void Method::set_breakpoint(int bci) { |
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1520 InstanceKlass* ik = method_holder(); |
0 | 1521 BreakpointInfo *bp = new BreakpointInfo(this, bci); |
1522 bp->set_next(ik->breakpoints()); | |
1523 ik->set_breakpoints(bp); | |
1524 // do this last: | |
1525 bp->set(this); | |
1526 } | |
1527 | |
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1528 static void clear_matches(Method* m, int bci) { |
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1529 InstanceKlass* ik = m->method_holder(); |
0 | 1530 BreakpointInfo* prev_bp = NULL; |
1531 BreakpointInfo* next_bp; | |
1532 for (BreakpointInfo* bp = ik->breakpoints(); bp != NULL; bp = next_bp) { | |
1533 next_bp = bp->next(); | |
1534 // bci value of -1 is used to delete all breakpoints in method m (ex: clear_all_breakpoint). | |
1535 if (bci >= 0 ? bp->match(m, bci) : bp->match(m)) { | |
1536 // do this first: | |
1537 bp->clear(m); | |
1538 // unhook it | |
1539 if (prev_bp != NULL) | |
1540 prev_bp->set_next(next_bp); | |
1541 else | |
1542 ik->set_breakpoints(next_bp); | |
1543 delete bp; | |
1544 // When class is redefined JVMTI sets breakpoint in all versions of EMCP methods | |
1545 // at same location. So we have multiple matching (method_index and bci) | |
1546 // BreakpointInfo nodes in BreakpointInfo list. We should just delete one | |
1547 // breakpoint for clear_breakpoint request and keep all other method versions | |
1548 // BreakpointInfo for future clear_breakpoint request. | |
1549 // bcivalue of -1 is used to clear all breakpoints (see clear_all_breakpoints) | |
1550 // which is being called when class is unloaded. We delete all the Breakpoint | |
1551 // information for all versions of method. We may not correctly restore the original | |
1552 // bytecode in all method versions, but that is ok. Because the class is being unloaded | |
1553 // so these methods won't be used anymore. | |
1554 if (bci >= 0) { | |
1555 break; | |
1556 } | |
1557 } else { | |
1558 // This one is a keeper. | |
1559 prev_bp = bp; | |
1560 } | |
1561 } | |
1562 } | |
1563 | |
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1564 void Method::clear_breakpoint(int bci) { |
0 | 1565 assert(bci >= 0, ""); |
1566 clear_matches(this, bci); | |
1567 } | |
1568 | |
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1569 void Method::clear_all_breakpoints() { |
0 | 1570 clear_matches(this, -1); |
1571 } | |
1572 | |
1573 | |
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1574 int Method::invocation_count() { |
1783 | 1575 if (TieredCompilation) { |
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1576 MethodData* const mdo = method_data(); |
1783 | 1577 if (invocation_counter()->carry() || ((mdo != NULL) ? mdo->invocation_counter()->carry() : false)) { |
1578 return InvocationCounter::count_limit; | |
1579 } else { | |
1580 return invocation_counter()->count() + ((mdo != NULL) ? mdo->invocation_counter()->count() : 0); | |
1581 } | |
1582 } else { | |
1583 return invocation_counter()->count(); | |
1584 } | |
1585 } | |
1586 | |
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1587 int Method::backedge_count() { |
1783 | 1588 if (TieredCompilation) { |
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1589 MethodData* const mdo = method_data(); |
1783 | 1590 if (backedge_counter()->carry() || ((mdo != NULL) ? mdo->backedge_counter()->carry() : false)) { |
1591 return InvocationCounter::count_limit; | |
1592 } else { | |
1593 return backedge_counter()->count() + ((mdo != NULL) ? mdo->backedge_counter()->count() : 0); | |
1594 } | |
1595 } else { | |
1596 return backedge_counter()->count(); | |
1597 } | |
1598 } | |
1599 | |
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1600 int Method::highest_comp_level() const { |
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1601 MethodData* mdo = method_data(); |
1783 | 1602 if (mdo != NULL) { |
1603 return mdo->highest_comp_level(); | |
1604 } else { | |
1605 return CompLevel_none; | |
1606 } | |
1607 } | |
1608 | |
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1609 int Method::highest_osr_comp_level() const { |
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1610 MethodData* mdo = method_data(); |
1783 | 1611 if (mdo != NULL) { |
1612 return mdo->highest_osr_comp_level(); | |
1613 } else { | |
1614 return CompLevel_none; | |
1615 } | |
1616 } | |
1617 | |
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1618 void Method::set_highest_comp_level(int level) { |
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1619 MethodData* mdo = method_data(); |
1783 | 1620 if (mdo != NULL) { |
1621 mdo->set_highest_comp_level(level); | |
1622 } | |
1623 } | |
1624 | |
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1625 void Method::set_highest_osr_comp_level(int level) { |
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1626 MethodData* mdo = method_data(); |
1783 | 1627 if (mdo != NULL) { |
1628 mdo->set_highest_osr_comp_level(level); | |
1629 } | |
1630 } | |
1631 | |
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1632 BreakpointInfo::BreakpointInfo(Method* m, int bci) { |
0 | 1633 _bci = bci; |
1634 _name_index = m->name_index(); | |
1635 _signature_index = m->signature_index(); | |
1636 _orig_bytecode = (Bytecodes::Code) *m->bcp_from(_bci); | |
1637 if (_orig_bytecode == Bytecodes::_breakpoint) | |
1638 _orig_bytecode = m->orig_bytecode_at(_bci); | |
1639 _next = NULL; | |
1640 } | |
1641 | |
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1642 void BreakpointInfo::set(Method* method) { |
0 | 1643 #ifdef ASSERT |
1644 { | |
1645 Bytecodes::Code code = (Bytecodes::Code) *method->bcp_from(_bci); | |
1646 if (code == Bytecodes::_breakpoint) | |
1647 code = method->orig_bytecode_at(_bci); | |
1648 assert(orig_bytecode() == code, "original bytecode must be the same"); | |
1649 } | |
1650 #endif | |
1651 *method->bcp_from(_bci) = Bytecodes::_breakpoint; | |
1652 method->incr_number_of_breakpoints(); | |
1653 SystemDictionary::notice_modification(); | |
1654 { | |
1655 // Deoptimize all dependents on this method | |
1656 Thread *thread = Thread::current(); | |
1657 HandleMark hm(thread); | |
1658 methodHandle mh(thread, method); | |
1659 Universe::flush_dependents_on_method(mh); | |
1660 } | |
1661 } | |
1662 | |
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1663 void BreakpointInfo::clear(Method* method) { |
0 | 1664 *method->bcp_from(_bci) = orig_bytecode(); |
1665 assert(method->number_of_breakpoints() > 0, "must not go negative"); | |
1666 method->decr_number_of_breakpoints(); | |
1667 } | |
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1668 |
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1669 // jmethodID handling |
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1670 |
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1671 // This is a block allocating object, sort of like JNIHandleBlock, only a |
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1672 // lot simpler. There aren't many of these, they aren't long, they are rarely |
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1673 // deleted and so we can do some suboptimal things. |
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1674 // It's allocated on the CHeap because once we allocate a jmethodID, we can |
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1675 // never get rid of it. |
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1676 // It would be nice to be able to parameterize the number of methods for |
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1677 // the null_class_loader but then we'd have to turn this and ClassLoaderData |
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1678 // into templates. |
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1679 |
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1680 // I feel like this brain dead class should exist somewhere in the STL |
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1681 |
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1682 class JNIMethodBlock : public CHeapObj<mtClass> { |
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1683 enum { number_of_methods = 8 }; |
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1684 |
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1685 Method* _methods[number_of_methods]; |
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1686 int _top; |
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1687 JNIMethodBlock* _next; |
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1688 public: |
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1689 static Method* const _free_method; |
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1690 |
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1691 JNIMethodBlock() : _next(NULL), _top(0) { |
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1692 for (int i = 0; i< number_of_methods; i++) _methods[i] = _free_method; |
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1693 } |
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1694 |
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1695 Method** add_method(Method* m) { |
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1696 if (_top < number_of_methods) { |
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1697 // top points to the next free entry. |
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1698 int i = _top; |
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1699 _methods[i] = m; |
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1700 _top++; |
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1701 return &_methods[i]; |
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1702 } else if (_top == number_of_methods) { |
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1703 // if the next free entry ran off the block see if there's a free entry |
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1704 for (int i = 0; i< number_of_methods; i++) { |
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1705 if (_methods[i] == _free_method) { |
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1706 _methods[i] = m; |
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1707 return &_methods[i]; |
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1708 } |
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1709 } |
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1710 // Only check each block once for frees. They're very unlikely. |
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1711 // Increment top past the end of the block. |
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1712 _top++; |
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1713 } |
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1714 // need to allocate a next block. |
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1715 if (_next == NULL) { |
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1716 _next = new JNIMethodBlock(); |
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1717 } |
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1718 return _next->add_method(m); |
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1719 } |
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1720 |
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1721 bool contains(Method** m) { |
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1722 for (JNIMethodBlock* b = this; b != NULL; b = b->_next) { |
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1723 for (int i = 0; i< number_of_methods; i++) { |
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1724 if (&(b->_methods[i]) == m) { |
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1725 return true; |
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1726 } |
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1727 } |
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1728 } |
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1729 return false; // not found |
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1730 } |
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1731 |
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1732 // Doesn't really destroy it, just marks it as free so it can be reused. |
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1733 void destroy_method(Method** m) { |
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1734 #ifdef ASSERT |
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1735 assert(contains(m), "should be a methodID"); |
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1736 #endif // ASSERT |
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1737 *m = _free_method; |
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1738 } |
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1739 |
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1740 // During class unloading the methods are cleared, which is different |
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1741 // than freed. |
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1742 void clear_all_methods() { |
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1743 for (JNIMethodBlock* b = this; b != NULL; b = b->_next) { |
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1744 for (int i = 0; i< number_of_methods; i++) { |
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1745 _methods[i] = NULL; |
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1746 } |
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1747 } |
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1748 } |
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1749 #ifndef PRODUCT |
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1750 int count_methods() { |
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1751 // count all allocated methods |
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1752 int count = 0; |
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1753 for (JNIMethodBlock* b = this; b != NULL; b = b->_next) { |
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1754 for (int i = 0; i< number_of_methods; i++) { |
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1755 if (_methods[i] != _free_method) count++; |
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1756 } |
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1757 } |
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1758 return count; |
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1759 } |
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1760 #endif // PRODUCT |
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1761 }; |
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1762 |
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1763 // Something that can't be mistaken for an address or a markOop |
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1764 Method* const JNIMethodBlock::_free_method = (Method*)55; |
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1765 |
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1766 // Add a method id to the jmethod_ids |
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1767 jmethodID Method::make_jmethod_id(ClassLoaderData* loader_data, Method* m) { |
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1768 ClassLoaderData* cld = loader_data; |
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1769 |
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1770 if (!SafepointSynchronize::is_at_safepoint()) { |
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1771 // Have to add jmethod_ids() to class loader data thread-safely. |
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1772 // Also have to add the method to the list safely, which the cld lock |
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1773 // protects as well. |
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1774 MutexLockerEx ml(cld->metaspace_lock(), Mutex::_no_safepoint_check_flag); |
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1775 if (cld->jmethod_ids() == NULL) { |
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1776 cld->set_jmethod_ids(new JNIMethodBlock()); |
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1777 } |
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1778 // jmethodID is a pointer to Method* |
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1779 return (jmethodID)cld->jmethod_ids()->add_method(m); |
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1780 } else { |
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1781 // At safepoint, we are single threaded and can set this. |
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1782 if (cld->jmethod_ids() == NULL) { |
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1783 cld->set_jmethod_ids(new JNIMethodBlock()); |
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1784 } |
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1785 // jmethodID is a pointer to Method* |
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1786 return (jmethodID)cld->jmethod_ids()->add_method(m); |
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1787 } |
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1788 } |
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1789 |
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1790 // Mark a jmethodID as free. This is called when there is a data race in |
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1791 // InstanceKlass while creating the jmethodID cache. |
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1792 void Method::destroy_jmethod_id(ClassLoaderData* loader_data, jmethodID m) { |
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1793 ClassLoaderData* cld = loader_data; |
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1794 Method** ptr = (Method**)m; |
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1795 assert(cld->jmethod_ids() != NULL, "should have method handles"); |
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1796 cld->jmethod_ids()->destroy_method(ptr); |
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1797 } |
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1798 |
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1799 void Method::change_method_associated_with_jmethod_id(jmethodID jmid, Method* new_method) { |
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1800 // Can't assert the method_holder is the same because the new method has the |
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1801 // scratch method holder. |
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1802 assert(resolve_jmethod_id(jmid)->method_holder()->class_loader() |
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1803 == new_method->method_holder()->class_loader(), |
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1804 "changing to a different class loader"); |
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1805 // Just change the method in place, jmethodID pointer doesn't change. |
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1806 *((Method**)jmid) = new_method; |
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1807 } |
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1808 |
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1809 bool Method::is_method_id(jmethodID mid) { |
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1810 Method* m = resolve_jmethod_id(mid); |
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1811 assert(m != NULL, "should be called with non-null method"); |
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1812 InstanceKlass* ik = m->method_holder(); |
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1813 ClassLoaderData* cld = ik->class_loader_data(); |
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1814 if (cld->jmethod_ids() == NULL) return false; |
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1815 return (cld->jmethod_ids()->contains((Method**)mid)); |
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1816 } |
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1817 |
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1818 Method* Method::checked_resolve_jmethod_id(jmethodID mid) { |
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1819 if (mid == NULL) return NULL; |
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1820 Method* o = resolve_jmethod_id(mid); |
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1821 if (o == NULL || o == JNIMethodBlock::_free_method || !((Metadata*)o)->is_method()) { |
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1822 return NULL; |
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1823 } |
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1824 return o; |
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1825 }; |
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1826 |
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1827 void Method::set_on_stack(const bool value) { |
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1828 // Set both the method itself and its constant pool. The constant pool |
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1829 // on stack means some method referring to it is also on the stack. |
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1830 _access_flags.set_on_stack(value); |
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1831 constants()->set_on_stack(value); |
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1832 if (value) MetadataOnStackMark::record(this); |
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1833 } |
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1834 |
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1835 // Called when the class loader is unloaded to make all methods weak. |
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1836 void Method::clear_jmethod_ids(ClassLoaderData* loader_data) { |
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1837 loader_data->jmethod_ids()->clear_all_methods(); |
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1838 } |
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1839 |
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1840 |
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1841 // Check that this pointer is valid by checking that the vtbl pointer matches |
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1842 bool Method::is_valid_method() const { |
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1843 if (this == NULL) { |
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1844 return false; |
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1845 } else if (!is_metaspace_object()) { |
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1846 return false; |
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1847 } else { |
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1848 Method m; |
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1849 // This assumes that the vtbl pointer is the first word of a C++ object. |
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1850 // This assumption is also in universe.cpp patch_klass_vtble |
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1851 void* vtbl2 = dereference_vptr((void*)&m); |
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1852 void* this_vtbl = dereference_vptr((void*)this); |
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1853 return vtbl2 == this_vtbl; |
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1854 } |
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1855 } |
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1856 |
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1857 #ifndef PRODUCT |
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1858 void Method::print_jmethod_ids(ClassLoaderData* loader_data, outputStream* out) { |
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1859 out->print_cr("jni_method_id count = %d", loader_data->jmethod_ids()->count_methods()); |
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1860 } |
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1861 #endif // PRODUCT |
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1862 |
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1863 |
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1864 // Printing |
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1865 |
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1866 #ifndef PRODUCT |
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1867 |
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1868 void Method::print_on(outputStream* st) const { |
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1869 ResourceMark rm; |
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1870 assert(is_method(), "must be method"); |
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1871 st->print_cr(internal_name()); |
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1872 // get the effect of PrintOopAddress, always, for methods: |
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1873 st->print_cr(" - this oop: "INTPTR_FORMAT, (intptr_t)this); |
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1874 st->print (" - method holder: "); method_holder()->print_value_on(st); st->cr(); |
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1875 st->print (" - constants: "INTPTR_FORMAT" ", (address)constants()); |
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1876 constants()->print_value_on(st); st->cr(); |
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1877 st->print (" - access: 0x%x ", access_flags().as_int()); access_flags().print_on(st); st->cr(); |
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1878 st->print (" - name: "); name()->print_value_on(st); st->cr(); |
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1879 st->print (" - signature: "); signature()->print_value_on(st); st->cr(); |
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1880 st->print_cr(" - max stack: %d", max_stack()); |
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1881 st->print_cr(" - max locals: %d", max_locals()); |
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1882 st->print_cr(" - size of params: %d", size_of_parameters()); |
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1883 st->print_cr(" - method size: %d", method_size()); |
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1884 if (intrinsic_id() != vmIntrinsics::_none) |
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1885 st->print_cr(" - intrinsic id: %d %s", intrinsic_id(), vmIntrinsics::name_at(intrinsic_id())); |
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1886 if (highest_comp_level() != CompLevel_none) |
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1887 st->print_cr(" - highest level: %d", highest_comp_level()); |
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1888 st->print_cr(" - vtable index: %d", _vtable_index); |
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1889 st->print_cr(" - i2i entry: " INTPTR_FORMAT, interpreter_entry()); |
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1890 st->print( " - adapters: "); |
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1891 AdapterHandlerEntry* a = ((Method*)this)->adapter(); |
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1892 if (a == NULL) |
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1893 st->print_cr(INTPTR_FORMAT, a); |
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1894 else |
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1895 a->print_adapter_on(st); |
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1896 st->print_cr(" - compiled entry " INTPTR_FORMAT, from_compiled_entry()); |
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1897 st->print_cr(" - code size: %d", code_size()); |
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1898 if (code_size() != 0) { |
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1899 st->print_cr(" - code start: " INTPTR_FORMAT, code_base()); |
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1900 st->print_cr(" - code end (excl): " INTPTR_FORMAT, code_base() + code_size()); |
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1901 } |
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1902 if (method_data() != NULL) { |
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1903 st->print_cr(" - method data: " INTPTR_FORMAT, (address)method_data()); |
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1904 } |
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1905 st->print_cr(" - checked ex length: %d", checked_exceptions_length()); |
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1906 if (checked_exceptions_length() > 0) { |
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1907 CheckedExceptionElement* table = checked_exceptions_start(); |
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1908 st->print_cr(" - checked ex start: " INTPTR_FORMAT, table); |
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1909 if (Verbose) { |
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1910 for (int i = 0; i < checked_exceptions_length(); i++) { |
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1911 st->print_cr(" - throws %s", constants()->printable_name_at(table[i].class_cp_index)); |
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1912 } |
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1913 } |
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1914 } |
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1915 if (has_linenumber_table()) { |
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1916 u_char* table = compressed_linenumber_table(); |
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1917 st->print_cr(" - linenumber start: " INTPTR_FORMAT, table); |
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1918 if (Verbose) { |
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1919 CompressedLineNumberReadStream stream(table); |
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1920 while (stream.read_pair()) { |
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1921 st->print_cr(" - line %d: %d", stream.line(), stream.bci()); |
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1922 } |
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1923 } |
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1924 } |
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1925 st->print_cr(" - localvar length: %d", localvariable_table_length()); |
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1926 if (localvariable_table_length() > 0) { |
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1927 LocalVariableTableElement* table = localvariable_table_start(); |
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1928 st->print_cr(" - localvar start: " INTPTR_FORMAT, table); |
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1929 if (Verbose) { |
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1930 for (int i = 0; i < localvariable_table_length(); i++) { |
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1931 int bci = table[i].start_bci; |
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1932 int len = table[i].length; |
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1933 const char* name = constants()->printable_name_at(table[i].name_cp_index); |
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1934 const char* desc = constants()->printable_name_at(table[i].descriptor_cp_index); |
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1935 int slot = table[i].slot; |
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1936 st->print_cr(" - %s %s bci=%d len=%d slot=%d", desc, name, bci, len, slot); |
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1937 } |
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1938 } |
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1939 } |
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1940 if (code() != NULL) { |
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1941 st->print (" - compiled code: "); |
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1942 code()->print_value_on(st); |
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1943 } |
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1944 if (is_native()) { |
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1945 st->print_cr(" - native function: " INTPTR_FORMAT, native_function()); |
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1946 st->print_cr(" - signature handler: " INTPTR_FORMAT, signature_handler()); |
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1947 } |
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1948 } |
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1949 |
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1950 #endif //PRODUCT |
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1951 |
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1952 void Method::print_value_on(outputStream* st) const { |
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1953 assert(is_method(), "must be method"); |
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1954 st->print_cr(internal_name()); |
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1955 print_address_on(st); |
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1956 st->print(" "); |
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1957 name()->print_value_on(st); |
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1958 st->print(" "); |
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1959 signature()->print_value_on(st); |
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1960 st->print(" in "); |
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1961 method_holder()->print_value_on(st); |
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1962 if (WizardMode) st->print("[%d,%d]", size_of_parameters(), max_locals()); |
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1963 if (WizardMode && code() != NULL) st->print(" ((nmethod*)%p)", code()); |
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1964 } |
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1965 |
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1966 |
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1967 // Verification |
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1968 |
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1969 void Method::verify_on(outputStream* st) { |
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1970 guarantee(is_method(), "object must be method"); |
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1971 guarantee(is_metadata(), "should be metadata"); |
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1972 guarantee(constants()->is_constantPool(), "should be constant pool"); |
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1973 guarantee(constants()->is_metadata(), "should be metadata"); |
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1974 guarantee(constMethod()->is_constMethod(), "should be ConstMethod*"); |
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1975 guarantee(constMethod()->is_metadata(), "should be metadata"); |
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1976 MethodData* md = method_data(); |
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1977 guarantee(md == NULL || |
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1978 md->is_metadata(), "should be metadata"); |
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1979 guarantee(md == NULL || |
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1980 md->is_methodData(), "should be method data"); |
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1981 } |
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1982 |
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1983 #ifdef GRAAL |
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1984 void DebugScopedMethod::print_on(outputStream* st) { |
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1985 if (_method != NULL) { |
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1986 st->print("Method@%p", _method); |
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1987 char holder[O_BUFLEN]; |
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1988 char nameAndSig[O_BUFLEN]; |
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1989 _method->method_holder()->name()->as_C_string(holder, O_BUFLEN); |
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1990 _method->name_and_sig_as_C_string(nameAndSig, O_BUFLEN); |
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1991 st->print(" - %s::%s", holder, nameAndSig); |
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1992 } |
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1993 } |
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1994 #endif |