Mercurial > hg > graal-jvmci-8
annotate src/share/vm/oops/method.cpp @ 23614:32b682649973 jdk8u75-b04
8132051: Better byte behavior
Reviewed-by: coleenp, roland
author | kevinw |
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date | Fri, 15 Jan 2016 22:33:15 +0000 |
parents | bf41eee321e5 |
children | cc78c97abff8 |
rev | line source |
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0 | 1 /* |
23614 | 2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
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26 #include "classfile/metadataOnStackMark.hpp" |
1972 | 27 #include "classfile/systemDictionary.hpp" |
28 #include "code/debugInfoRec.hpp" | |
29 #include "gc_interface/collectedHeap.inline.hpp" | |
30 #include "interpreter/bytecodeStream.hpp" | |
31 #include "interpreter/bytecodeTracer.hpp" | |
32 #include "interpreter/bytecodes.hpp" | |
33 #include "interpreter/interpreter.hpp" | |
34 #include "interpreter/oopMapCache.hpp" | |
35 #include "memory/gcLocker.hpp" | |
36 #include "memory/generation.hpp" | |
7956 | 37 #include "memory/heapInspection.hpp" |
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38 #include "memory/metadataFactory.hpp" |
1972 | 39 #include "memory/oopFactory.hpp" |
6934 | 40 #include "oops/constMethod.hpp" |
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41 #include "oops/methodData.hpp" |
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42 #include "oops/method.hpp" |
1972 | 43 #include "oops/oop.inline.hpp" |
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44 #include "oops/symbol.hpp" |
1972 | 45 #include "prims/jvmtiExport.hpp" |
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46 #include "prims/methodHandles.hpp" |
1972 | 47 #include "prims/nativeLookup.hpp" |
48 #include "runtime/arguments.hpp" | |
49 #include "runtime/compilationPolicy.hpp" | |
50 #include "runtime/frame.inline.hpp" | |
51 #include "runtime/handles.inline.hpp" | |
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52 #include "runtime/orderAccess.inline.hpp" |
1972 | 53 #include "runtime/relocator.hpp" |
54 #include "runtime/sharedRuntime.hpp" | |
55 #include "runtime/signature.hpp" | |
3779 | 56 #include "utilities/quickSort.hpp" |
1972 | 57 #include "utilities/xmlstream.hpp" |
0 | 58 |
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59 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
0 | 60 |
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61 // Implementation of Method |
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62 |
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63 Method* Method::allocate(ClassLoaderData* loader_data, |
6934 | 64 int byte_code_size, |
65 AccessFlags access_flags, | |
8031 | 66 InlineTableSizes* sizes, |
6934 | 67 ConstMethod::MethodType method_type, |
68 TRAPS) { | |
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69 assert(!access_flags.is_native() || byte_code_size == 0, |
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70 "native methods should not contain byte codes"); |
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71 ConstMethod* cm = ConstMethod::allocate(loader_data, |
6934 | 72 byte_code_size, |
8031 | 73 sizes, |
6934 | 74 method_type, |
75 CHECK_NULL); | |
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76 |
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77 int size = Method::size(access_flags.is_native()); |
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78 |
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79 return new (loader_data, size, false, MetaspaceObj::MethodType, THREAD) Method(cm, access_flags, size); |
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80 } |
0 | 81 |
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82 Method::Method(ConstMethod* xconst, AccessFlags access_flags, int size) { |
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83 No_Safepoint_Verifier no_safepoint; |
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84 set_constMethod(xconst); |
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85 set_access_flags(access_flags); |
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86 set_method_size(size); |
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87 #ifdef CC_INTERP |
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88 set_result_index(T_VOID); |
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89 #endif |
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90 set_intrinsic_id(vmIntrinsics::_none); |
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91 set_jfr_towrite(false); |
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92 set_force_inline(false); |
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93 set_hidden(false); |
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94 set_dont_inline(false); |
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95 set_has_injected_profile(false); |
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96 set_method_data(NULL); |
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97 clear_method_counters(); |
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98 set_vtable_index(Method::garbage_vtable_index); |
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99 |
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100 // Fix and bury in Method* |
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101 set_interpreter_entry(NULL); // sets i2i entry and from_int |
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102 set_adapter_entry(NULL); |
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103 clear_code(); // from_c/from_i get set to c2i/i2i |
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104 |
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105 if (access_flags.is_native()) { |
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106 clear_native_function(); |
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107 set_signature_handler(NULL); |
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108 } |
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109 |
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110 NOT_PRODUCT(set_compiled_invocation_count(0);) |
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111 } |
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112 |
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113 // Release Method*. The nmethod will be gone when we get here because |
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114 // we've walked the code cache. |
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115 void Method::deallocate_contents(ClassLoaderData* loader_data) { |
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116 MetadataFactory::free_metadata(loader_data, constMethod()); |
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117 set_constMethod(NULL); |
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118 MetadataFactory::free_metadata(loader_data, method_data()); |
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119 set_method_data(NULL); |
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120 MetadataFactory::free_metadata(loader_data, method_counters()); |
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121 clear_method_counters(); |
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122 // The nmethod will be gone when we get here. |
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123 if (code() != NULL) _code = NULL; |
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124 } |
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125 |
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126 address Method::get_i2c_entry() { |
0 | 127 assert(_adapter != NULL, "must have"); |
128 return _adapter->get_i2c_entry(); | |
129 } | |
130 | |
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131 address Method::get_c2i_entry() { |
0 | 132 assert(_adapter != NULL, "must have"); |
133 return _adapter->get_c2i_entry(); | |
134 } | |
135 | |
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136 address Method::get_c2i_unverified_entry() { |
0 | 137 assert(_adapter != NULL, "must have"); |
138 return _adapter->get_c2i_unverified_entry(); | |
139 } | |
140 | |
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141 char* Method::name_and_sig_as_C_string() const { |
6983 | 142 return name_and_sig_as_C_string(constants()->pool_holder(), name(), signature()); |
0 | 143 } |
144 | |
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145 char* Method::name_and_sig_as_C_string(char* buf, int size) const { |
6983 | 146 return name_and_sig_as_C_string(constants()->pool_holder(), name(), signature(), buf, size); |
0 | 147 } |
148 | |
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149 char* Method::name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature) { |
0 | 150 const char* klass_name = klass->external_name(); |
151 int klass_name_len = (int)strlen(klass_name); | |
152 int method_name_len = method_name->utf8_length(); | |
153 int len = klass_name_len + 1 + method_name_len + signature->utf8_length(); | |
154 char* dest = NEW_RESOURCE_ARRAY(char, len + 1); | |
155 strcpy(dest, klass_name); | |
156 dest[klass_name_len] = '.'; | |
157 strcpy(&dest[klass_name_len + 1], method_name->as_C_string()); | |
158 strcpy(&dest[klass_name_len + 1 + method_name_len], signature->as_C_string()); | |
159 dest[len] = 0; | |
160 return dest; | |
161 } | |
162 | |
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163 char* Method::name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size) { |
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164 Symbol* klass_name = klass->name(); |
0 | 165 klass_name->as_klass_external_name(buf, size); |
166 int len = (int)strlen(buf); | |
167 | |
168 if (len < size - 1) { | |
169 buf[len++] = '.'; | |
170 | |
171 method_name->as_C_string(&(buf[len]), size - len); | |
172 len = (int)strlen(buf); | |
173 | |
174 signature->as_C_string(&(buf[len]), size - len); | |
175 } | |
176 | |
177 return buf; | |
178 } | |
179 | |
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180 int Method::fast_exception_handler_bci_for(methodHandle mh, KlassHandle ex_klass, int throw_bci, TRAPS) { |
0 | 181 // exception table holds quadruple entries of the form (beg_bci, end_bci, handler_bci, klass_index) |
182 // access exception table | |
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183 ExceptionTable table(mh()); |
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184 int length = table.length(); |
0 | 185 // iterate through all entries sequentially |
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186 constantPoolHandle pool(THREAD, mh->constants()); |
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187 for (int i = 0; i < length; i ++) { |
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188 //reacquire the table in case a GC happened |
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189 ExceptionTable table(mh()); |
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190 int beg_bci = table.start_pc(i); |
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191 int end_bci = table.end_pc(i); |
0 | 192 assert(beg_bci <= end_bci, "inconsistent exception table"); |
193 if (beg_bci <= throw_bci && throw_bci < end_bci) { | |
194 // exception handler bci range covers throw_bci => investigate further | |
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195 int handler_bci = table.handler_pc(i); |
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196 int klass_index = table.catch_type_index(i); |
0 | 197 if (klass_index == 0) { |
198 return handler_bci; | |
199 } else if (ex_klass.is_null()) { | |
200 return handler_bci; | |
201 } else { | |
202 // we know the exception class => get the constraint class | |
203 // this may require loading of the constraint class; if verification | |
204 // fails or some other exception occurs, return handler_bci | |
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205 Klass* k = pool->klass_at(klass_index, CHECK_(handler_bci)); |
0 | 206 KlassHandle klass = KlassHandle(THREAD, k); |
207 assert(klass.not_null(), "klass not loaded"); | |
208 if (ex_klass->is_subtype_of(klass())) { | |
209 return handler_bci; | |
210 } | |
211 } | |
212 } | |
213 } | |
214 | |
215 return -1; | |
216 } | |
217 | |
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218 void Method::mask_for(int bci, InterpreterOopMap* mask) { |
0 | 219 |
220 Thread* myThread = Thread::current(); | |
221 methodHandle h_this(myThread, this); | |
222 #ifdef ASSERT | |
223 bool has_capability = myThread->is_VM_thread() || | |
224 myThread->is_ConcurrentGC_thread() || | |
225 myThread->is_GC_task_thread(); | |
226 | |
227 if (!has_capability) { | |
228 if (!VerifyStack && !VerifyLastFrame) { | |
229 // verify stack calls this outside VM thread | |
230 warning("oopmap should only be accessed by the " | |
231 "VM, GC task or CMS threads (or during debugging)"); | |
232 InterpreterOopMap local_mask; | |
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233 method_holder()->mask_for(h_this, bci, &local_mask); |
0 | 234 local_mask.print(); |
235 } | |
236 } | |
237 #endif | |
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238 method_holder()->mask_for(h_this, bci, mask); |
0 | 239 return; |
240 } | |
241 | |
242 | |
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243 int Method::bci_from(address bcp) const { |
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244 #ifdef ASSERT |
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245 { ResourceMark rm; |
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246 assert(is_native() && bcp == code_base() || contains(bcp) || is_error_reported(), |
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247 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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248 } |
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249 #endif |
0 | 250 return bcp - code_base(); |
251 } | |
252 | |
253 | |
254 // Return (int)bcx if it appears to be a valid BCI. | |
255 // Return bci_from((address)bcx) if it appears to be a valid BCP. | |
256 // Return -1 otherwise. | |
257 // Used by profiling code, when invalid data is a possibility. | |
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258 // The caller is responsible for validating the Method* itself. |
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259 int Method::validate_bci_from_bcx(intptr_t bcx) const { |
0 | 260 // keep bci as -1 if not a valid bci |
261 int bci = -1; | |
262 if (bcx == 0 || (address)bcx == code_base()) { | |
263 // code_size() may return 0 and we allow 0 here | |
264 // the method may be native | |
265 bci = 0; | |
266 } else if (frame::is_bci(bcx)) { | |
267 if (bcx < code_size()) { | |
268 bci = (int)bcx; | |
269 } | |
270 } else if (contains((address)bcx)) { | |
271 bci = (address)bcx - code_base(); | |
272 } | |
273 // Assert that if we have dodged any asserts, bci is negative. | |
274 assert(bci == -1 || bci == bci_from(bcp_from(bci)), "sane bci if >=0"); | |
275 return bci; | |
276 } | |
277 | |
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278 address Method::bcp_from(int bci) const { |
17780 | 279 assert((is_native() && bci == 0) || (!is_native() && 0 <= bci && bci < code_size()), err_msg("illegal bci: %d", bci)); |
0 | 280 address bcp = code_base() + bci; |
281 assert(is_native() && bcp == code_base() || contains(bcp), "bcp doesn't belong to this method"); | |
282 return bcp; | |
283 } | |
284 | |
285 | |
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286 int Method::size(bool is_native) { |
0 | 287 // If native, then include pointers for native_function and signature_handler |
288 int extra_bytes = (is_native) ? 2*sizeof(address*) : 0; | |
289 int extra_words = align_size_up(extra_bytes, BytesPerWord) / BytesPerWord; | |
290 return align_object_size(header_size() + extra_words); | |
291 } | |
292 | |
293 | |
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294 Symbol* Method::klass_name() const { |
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295 Klass* k = method_holder(); |
0 | 296 assert(k->is_klass(), "must be klass"); |
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297 InstanceKlass* ik = (InstanceKlass*) k; |
0 | 298 return ik->name(); |
299 } | |
300 | |
301 | |
302 // Attempt to return method oop to original state. Clear any pointers | |
303 // (to objects outside the shared spaces). We won't be able to predict | |
304 // where they should point in a new JVM. Further initialize some | |
305 // entries now in order allow them to be write protected later. | |
306 | |
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307 void Method::remove_unshareable_info() { |
0 | 308 unlink_method(); |
309 } | |
310 | |
311 | |
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312 bool Method::was_executed_more_than(int n) { |
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313 // Invocation counter is reset when the Method* is compiled. |
0 | 314 // If the method has compiled code we therefore assume it has |
315 // be excuted more than n times. | |
316 if (is_accessor() || is_empty_method() || (code() != NULL)) { | |
317 // interpreter doesn't bump invocation counter of trivial methods | |
318 // compiler does not bump invocation counter of compiled methods | |
319 return true; | |
1783 | 320 } |
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321 else if ((method_counters() != NULL && |
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322 method_counters()->invocation_counter()->carry()) || |
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323 (method_data() != NULL && |
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324 method_data()->invocation_counter()->carry())) { |
0 | 325 // The carry bit is set when the counter overflows and causes |
326 // a compilation to occur. We don't know how many times | |
327 // the counter has been reset, so we simply assume it has | |
328 // been executed more than n times. | |
329 return true; | |
330 } else { | |
331 return invocation_count() > n; | |
332 } | |
333 } | |
334 | |
335 #ifndef PRODUCT | |
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336 void Method::print_invocation_count() { |
0 | 337 if (is_static()) tty->print("static "); |
338 if (is_final()) tty->print("final "); | |
339 if (is_synchronized()) tty->print("synchronized "); | |
340 if (is_native()) tty->print("native "); | |
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341 method_holder()->name()->print_symbol_on(tty); |
0 | 342 tty->print("."); |
343 name()->print_symbol_on(tty); | |
344 signature()->print_symbol_on(tty); | |
345 | |
346 if (WizardMode) { | |
347 // dump the size of the byte codes | |
348 tty->print(" {%d}", code_size()); | |
349 } | |
350 tty->cr(); | |
351 | |
352 tty->print_cr (" interpreter_invocation_count: %8d ", interpreter_invocation_count()); | |
353 tty->print_cr (" invocation_counter: %8d ", invocation_count()); | |
354 tty->print_cr (" backedge_counter: %8d ", backedge_count()); | |
355 if (CountCompiledCalls) { | |
356 tty->print_cr (" compiled_invocation_count: %8d ", compiled_invocation_count()); | |
357 } | |
358 | |
359 } | |
360 #endif | |
361 | |
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362 // Build a MethodData* object to hold information about this method |
0 | 363 // collected in the interpreter. |
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364 void Method::build_interpreter_method_data(methodHandle method, TRAPS) { |
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365 // Do not profile method if current thread holds the pending list lock, |
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366 // which avoids deadlock for acquiring the MethodData_lock. |
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367 if (InstanceRefKlass::owns_pending_list_lock((JavaThread*)THREAD)) { |
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368 return; |
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369 } |
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370 |
0 | 371 // Grab a lock here to prevent multiple |
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372 // MethodData*s from being created. |
0 | 373 MutexLocker ml(MethodData_lock, THREAD); |
374 if (method->method_data() == NULL) { | |
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375 ClassLoaderData* loader_data = method->method_holder()->class_loader_data(); |
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376 MethodData* method_data = MethodData::allocate(loader_data, method, CHECK); |
0 | 377 method->set_method_data(method_data); |
378 if (PrintMethodData && (Verbose || WizardMode)) { | |
379 ResourceMark rm(THREAD); | |
380 tty->print("build_interpreter_method_data for "); | |
381 method->print_name(tty); | |
382 tty->cr(); | |
383 // At the end of the run, the MDO, full of data, will be dumped. | |
384 } | |
385 } | |
386 } | |
387 | |
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388 MethodCounters* Method::build_method_counters(Method* m, TRAPS) { |
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389 methodHandle mh(m); |
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390 ClassLoaderData* loader_data = mh->method_holder()->class_loader_data(); |
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391 MethodCounters* counters = MethodCounters::allocate(loader_data, CHECK_NULL); |
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392 if (!mh->init_method_counters(counters)) { |
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393 MetadataFactory::free_metadata(loader_data, counters); |
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394 } |
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395 return mh->method_counters(); |
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396 } |
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397 |
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398 void Method::cleanup_inline_caches() { |
0 | 399 // The current system doesn't use inline caches in the interpreter |
400 // => nothing to do (keep this method around for future use) | |
401 } | |
402 | |
403 | |
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404 int Method::extra_stack_words() { |
710 | 405 // not an inline function, to avoid a header dependency on Interpreter |
1506 | 406 return extra_stack_entries() * Interpreter::stackElementSize; |
710 | 407 } |
408 | |
409 | |
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410 void Method::compute_size_of_parameters(Thread *thread) { |
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411 ArgumentSizeComputer asc(signature()); |
0 | 412 set_size_of_parameters(asc.size() + (is_static() ? 0 : 1)); |
413 } | |
414 | |
415 #ifdef CC_INTERP | |
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416 void Method::set_result_index(BasicType type) { |
0 | 417 _result_index = Interpreter::BasicType_as_index(type); |
418 } | |
419 #endif | |
420 | |
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421 BasicType Method::result_type() const { |
0 | 422 ResultTypeFinder rtf(signature()); |
423 return rtf.type(); | |
424 } | |
425 | |
426 | |
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427 bool Method::is_empty_method() const { |
0 | 428 return code_size() == 1 |
429 && *code_base() == Bytecodes::_return; | |
430 } | |
431 | |
432 | |
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433 bool Method::is_vanilla_constructor() const { |
0 | 434 // Returns true if this method is a vanilla constructor, i.e. an "<init>" "()V" method |
435 // which only calls the superclass vanilla constructor and possibly does stores of | |
436 // zero constants to local fields: | |
437 // | |
438 // aload_0 | |
439 // invokespecial | |
440 // indexbyte1 | |
441 // indexbyte2 | |
442 // | |
443 // followed by an (optional) sequence of: | |
444 // | |
445 // aload_0 | |
446 // aconst_null / iconst_0 / fconst_0 / dconst_0 | |
447 // putfield | |
448 // indexbyte1 | |
449 // indexbyte2 | |
450 // | |
451 // followed by: | |
452 // | |
453 // return | |
454 | |
455 assert(name() == vmSymbols::object_initializer_name(), "Should only be called for default constructors"); | |
456 assert(signature() == vmSymbols::void_method_signature(), "Should only be called for default constructors"); | |
457 int size = code_size(); | |
458 // Check if size match | |
459 if (size == 0 || size % 5 != 0) return false; | |
460 address cb = code_base(); | |
461 int last = size - 1; | |
462 if (cb[0] != Bytecodes::_aload_0 || cb[1] != Bytecodes::_invokespecial || cb[last] != Bytecodes::_return) { | |
463 // Does not call superclass default constructor | |
464 return false; | |
465 } | |
466 // Check optional sequence | |
467 for (int i = 4; i < last; i += 5) { | |
468 if (cb[i] != Bytecodes::_aload_0) return false; | |
469 if (!Bytecodes::is_zero_const(Bytecodes::cast(cb[i+1]))) return false; | |
470 if (cb[i+2] != Bytecodes::_putfield) return false; | |
471 } | |
472 return true; | |
473 } | |
474 | |
475 | |
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476 bool Method::compute_has_loops_flag() { |
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477 BytecodeStream bcs(this); |
0 | 478 Bytecodes::Code bc; |
479 | |
480 while ((bc = bcs.next()) >= 0) { | |
481 switch( bc ) { | |
482 case Bytecodes::_ifeq: | |
483 case Bytecodes::_ifnull: | |
484 case Bytecodes::_iflt: | |
485 case Bytecodes::_ifle: | |
486 case Bytecodes::_ifne: | |
487 case Bytecodes::_ifnonnull: | |
488 case Bytecodes::_ifgt: | |
489 case Bytecodes::_ifge: | |
490 case Bytecodes::_if_icmpeq: | |
491 case Bytecodes::_if_icmpne: | |
492 case Bytecodes::_if_icmplt: | |
493 case Bytecodes::_if_icmpgt: | |
494 case Bytecodes::_if_icmple: | |
495 case Bytecodes::_if_icmpge: | |
496 case Bytecodes::_if_acmpeq: | |
497 case Bytecodes::_if_acmpne: | |
498 case Bytecodes::_goto: | |
499 case Bytecodes::_jsr: | |
500 if( bcs.dest() < bcs.next_bci() ) _access_flags.set_has_loops(); | |
501 break; | |
502 | |
503 case Bytecodes::_goto_w: | |
504 case Bytecodes::_jsr_w: | |
505 if( bcs.dest_w() < bcs.next_bci() ) _access_flags.set_has_loops(); | |
506 break; | |
507 } | |
508 } | |
509 _access_flags.set_loops_flag_init(); | |
510 return _access_flags.has_loops(); | |
511 } | |
512 | |
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513 bool Method::is_final_method(AccessFlags class_access_flags) const { |
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514 // or "does_not_require_vtable_entry" |
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515 // default method or overpass can occur, is not final (reuses vtable entry) |
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516 // private methods get vtable entries for backward class compatibility. |
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517 if (is_overpass() || is_default_method()) return false; |
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518 return is_final() || class_access_flags.is_final(); |
0 | 519 } |
520 | |
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521 bool Method::is_final_method() const { |
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522 return is_final_method(method_holder()->access_flags()); |
0 | 523 } |
524 | |
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525 bool Method::is_default_method() const { |
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526 if (method_holder() != NULL && |
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527 method_holder()->is_interface() && |
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528 !is_abstract()) { |
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529 return true; |
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530 } else { |
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531 return false; |
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532 } |
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533 } |
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534 |
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535 bool Method::can_be_statically_bound(AccessFlags class_access_flags) const { |
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536 if (is_final_method(class_access_flags)) return true; |
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537 #ifdef ASSERT |
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538 ResourceMark rm; |
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539 bool is_nonv = (vtable_index() == nonvirtual_vtable_index); |
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540 if (class_access_flags.is_interface()) { |
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541 assert(is_nonv == is_static(), err_msg("is_nonv=%s", name_and_sig_as_C_string())); |
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542 } |
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543 #endif |
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544 assert(valid_vtable_index() || valid_itable_index(), "method must be linked before we ask this question"); |
0 | 545 return vtable_index() == nonvirtual_vtable_index; |
546 } | |
547 | |
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548 bool Method::can_be_statically_bound() const { |
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549 return can_be_statically_bound(method_holder()->access_flags()); |
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550 } |
0 | 551 |
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552 bool Method::is_accessor() const { |
0 | 553 if (code_size() != 5) return false; |
554 if (size_of_parameters() != 1) return false; | |
2142 | 555 if (java_code_at(0) != Bytecodes::_aload_0 ) return false; |
556 if (java_code_at(1) != Bytecodes::_getfield) return false; | |
557 if (java_code_at(4) != Bytecodes::_areturn && | |
558 java_code_at(4) != Bytecodes::_ireturn ) return false; | |
0 | 559 return true; |
560 } | |
561 | |
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562 bool Method::is_constant_getter() const { |
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563 int last_index = code_size() - 1; |
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564 // Check if the first 1-3 bytecodes are a constant push |
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565 // and the last bytecode is a return. |
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566 return (2 <= code_size() && code_size() <= 4 && |
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567 Bytecodes::is_const(java_code_at(0)) && |
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568 Bytecodes::length_for(java_code_at(0)) == last_index && |
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569 Bytecodes::is_return(java_code_at(last_index))); |
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570 } |
0 | 571 |
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572 bool Method::is_initializer() const { |
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573 return name() == vmSymbols::object_initializer_name() || is_static_initializer(); |
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574 } |
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575 |
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576 bool Method::has_valid_initializer_flags() const { |
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577 return (is_static() || |
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578 method_holder()->major_version() < 51); |
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579 } |
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580 |
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581 bool Method::is_static_initializer() const { |
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582 // For classfiles version 51 or greater, ensure that the clinit method is |
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583 // static. Non-static methods with the name "<clinit>" are not static |
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584 // initializers. (older classfiles exempted for backward compatibility) |
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585 return name() == vmSymbols::class_initializer_name() && |
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586 has_valid_initializer_flags(); |
0 | 587 } |
588 | |
589 | |
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590 objArrayHandle Method::resolved_checked_exceptions_impl(Method* this_oop, TRAPS) { |
0 | 591 int length = this_oop->checked_exceptions_length(); |
592 if (length == 0) { // common case | |
593 return objArrayHandle(THREAD, Universe::the_empty_class_klass_array()); | |
594 } else { | |
595 methodHandle h_this(THREAD, this_oop); | |
1142 | 596 objArrayOop m_oop = oopFactory::new_objArray(SystemDictionary::Class_klass(), length, CHECK_(objArrayHandle())); |
0 | 597 objArrayHandle mirrors (THREAD, m_oop); |
598 for (int i = 0; i < length; i++) { | |
599 CheckedExceptionElement* table = h_this->checked_exceptions_start(); // recompute on each iteration, not gc safe | |
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600 Klass* k = h_this->constants()->klass_at(table[i].class_cp_index, CHECK_(objArrayHandle())); |
6983 | 601 assert(k->is_subclass_of(SystemDictionary::Throwable_klass()), "invalid exception class"); |
602 mirrors->obj_at_put(i, k->java_mirror()); | |
0 | 603 } |
604 return mirrors; | |
605 } | |
606 }; | |
607 | |
608 | |
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609 int Method::line_number_from_bci(int bci) const { |
0 | 610 if (bci == SynchronizationEntryBCI) bci = 0; |
611 assert(bci == 0 || 0 <= bci && bci < code_size(), "illegal bci"); | |
612 int best_bci = 0; | |
613 int best_line = -1; | |
614 | |
615 if (has_linenumber_table()) { | |
616 // The line numbers are a short array of 2-tuples [start_pc, line_number]. | |
617 // Not necessarily sorted and not necessarily one-to-one. | |
618 CompressedLineNumberReadStream stream(compressed_linenumber_table()); | |
619 while (stream.read_pair()) { | |
620 if (stream.bci() == bci) { | |
621 // perfect match | |
622 return stream.line(); | |
623 } else { | |
624 // update best_bci/line | |
625 if (stream.bci() < bci && stream.bci() >= best_bci) { | |
626 best_bci = stream.bci(); | |
627 best_line = stream.line(); | |
628 } | |
629 } | |
630 } | |
631 } | |
632 return best_line; | |
633 } | |
634 | |
635 | |
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636 bool Method::is_klass_loaded_by_klass_index(int klass_index) const { |
6123
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637 if( constants()->tag_at(klass_index).is_unresolved_klass() ) { |
0 | 638 Thread *thread = Thread::current(); |
6123
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639 Symbol* klass_name = constants()->klass_name_at(klass_index); |
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640 Handle loader(thread, method_holder()->class_loader()); |
6983 | 641 Handle prot (thread, method_holder()->protection_domain()); |
0 | 642 return SystemDictionary::find(klass_name, loader, prot, thread) != NULL; |
643 } else { | |
644 return true; | |
645 } | |
646 } | |
647 | |
648 | |
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649 bool Method::is_klass_loaded(int refinfo_index, bool must_be_resolved) const { |
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650 int klass_index = constants()->klass_ref_index_at(refinfo_index); |
0 | 651 if (must_be_resolved) { |
652 // Make sure klass is resolved in constantpool. | |
653 if (constants()->tag_at(klass_index).is_unresolved_klass()) return false; | |
654 } | |
655 return is_klass_loaded_by_klass_index(klass_index); | |
656 } | |
657 | |
658 | |
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659 void Method::set_native_function(address function, bool post_event_flag) { |
0 | 660 assert(function != NULL, "use clear_native_function to unregister natives"); |
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661 assert(!is_method_handle_intrinsic() || function == SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), ""); |
0 | 662 address* native_function = native_function_addr(); |
663 | |
664 // We can see racers trying to place the same native function into place. Once | |
665 // is plenty. | |
666 address current = *native_function; | |
667 if (current == function) return; | |
668 if (post_event_flag && JvmtiExport::should_post_native_method_bind() && | |
669 function != NULL) { | |
670 // native_method_throw_unsatisfied_link_error_entry() should only | |
671 // be passed when post_event_flag is false. | |
672 assert(function != | |
673 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
674 "post_event_flag mis-match"); | |
675 | |
676 // post the bind event, and possible change the bind function | |
677 JvmtiExport::post_native_method_bind(this, &function); | |
678 } | |
679 *native_function = function; | |
680 // This function can be called more than once. We must make sure that we always | |
681 // use the latest registered method -> check if a stub already has been generated. | |
682 // If so, we have to make it not_entrant. | |
683 nmethod* nm = code(); // Put it into local variable to guard against concurrent updates | |
684 if (nm != NULL) { | |
685 nm->make_not_entrant(); | |
686 } | |
687 } | |
688 | |
689 | |
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690 bool Method::has_native_function() const { |
6267
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7187290: nightly failures after JSR 292 lazy method handle update
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691 if (is_method_handle_intrinsic()) |
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692 return false; // special-cased in SharedRuntime::generate_native_wrapper |
0 | 693 address func = native_function(); |
694 return (func != NULL && func != SharedRuntime::native_method_throw_unsatisfied_link_error_entry()); | |
695 } | |
696 | |
697 | |
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698 void Method::clear_native_function() { |
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699 // Note: is_method_handle_intrinsic() is allowed here. |
0 | 700 set_native_function( |
701 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
702 !native_bind_event_is_interesting); | |
703 clear_code(); | |
704 } | |
705 | |
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706 address Method::critical_native_function() { |
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0382d2b469b2
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707 methodHandle mh(this); |
0382d2b469b2
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708 return NativeLookup::lookup_critical_entry(mh); |
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|
709 } |
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710 |
0 | 711 |
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712 void Method::set_signature_handler(address handler) { |
0 | 713 address* signature_handler = signature_handler_addr(); |
714 *signature_handler = handler; | |
715 } | |
716 | |
717 | |
7998 | 718 void Method::print_made_not_compilable(int comp_level, bool is_osr, bool report, const char* reason) { |
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6923043: failed nightly tests which use -XX:+PrintCompilation -Xcomp -XX:CompileOnly
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|
719 if (PrintCompilation && report) { |
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6614597: Performance variability in jvm2008 xml.validation
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|
720 ttyLocker ttyl; |
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7200001: failed C1 OSR compile doesn't get recompiled with C2
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|
721 tty->print("made not %scompilable on ", is_osr ? "OSR " : ""); |
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|
722 if (comp_level == CompLevel_all) { |
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7200001: failed C1 OSR compile doesn't get recompiled with C2
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|
723 tty->print("all levels "); |
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724 } else { |
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|
725 tty->print("levels "); |
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726 for (int i = (int)CompLevel_none; i <= comp_level; i++) { |
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727 tty->print("%d ", i); |
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|
728 } |
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|
729 } |
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730 this->print_short_name(tty); |
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731 int size = this->code_size(); |
7998 | 732 if (size > 0) { |
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733 tty->print(" (%d bytes)", size); |
7998 | 734 } |
735 if (reason != NULL) { | |
736 tty->print(" %s", reason); | |
737 } | |
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738 tty->cr(); |
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739 } |
0 | 740 if ((TraceDeoptimization || LogCompilation) && (xtty != NULL)) { |
741 ttyLocker ttyl; | |
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742 xtty->begin_elem("make_not_compilable thread='" UINTX_FORMAT "' osr='%d' level='%d'", |
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743 os::current_thread_id(), is_osr, comp_level); |
7998 | 744 if (reason != NULL) { |
745 xtty->print(" reason=\'%s\'", reason); | |
746 } | |
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747 xtty->method(this); |
0 | 748 xtty->stamp(); |
749 xtty->end_elem(); | |
750 } | |
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751 } |
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752 |
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753 bool Method::is_always_compilable() const { |
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|
754 // Generated adapters must be compiled |
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755 if (is_method_handle_intrinsic() && is_synthetic()) { |
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|
756 assert(!is_not_c1_compilable(), "sanity check"); |
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|
757 assert(!is_not_c2_compilable(), "sanity check"); |
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758 return true; |
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759 } |
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760 |
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761 return false; |
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762 } |
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763 |
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764 bool Method::is_not_compilable(int comp_level) const { |
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765 if (number_of_breakpoints() > 0) |
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766 return true; |
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767 if (is_always_compilable()) |
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768 return false; |
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769 if (comp_level == CompLevel_any) |
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770 return is_not_c1_compilable() || is_not_c2_compilable(); |
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771 if (is_c1_compile(comp_level)) |
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772 return is_not_c1_compilable(); |
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773 if (is_c2_compile(comp_level)) |
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774 return is_not_c2_compilable(); |
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775 return false; |
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776 } |
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777 |
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778 // call this when compiler finds that this method is not compilable |
7998 | 779 void Method::set_not_compilable(int comp_level, bool report, const char* reason) { |
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780 if (is_always_compilable()) { |
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781 // Don't mark a method which should be always compilable |
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782 return; |
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783 } |
7998 | 784 print_made_not_compilable(comp_level, /*is_osr*/ false, report, reason); |
1783 | 785 if (comp_level == CompLevel_all) { |
786 set_not_c1_compilable(); | |
787 set_not_c2_compilable(); | |
788 } else { | |
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789 if (is_c1_compile(comp_level)) |
1783 | 790 set_not_c1_compilable(); |
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791 if (is_c2_compile(comp_level)) |
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792 set_not_c2_compilable(); |
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793 } |
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794 CompilationPolicy::policy()->disable_compilation(this); |
12073 | 795 assert(!CompilationPolicy::can_be_compiled(this, comp_level), "sanity check"); |
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796 } |
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797 |
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798 bool Method::is_not_osr_compilable(int comp_level) const { |
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799 if (is_not_compilable(comp_level)) |
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800 return true; |
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801 if (comp_level == CompLevel_any) |
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802 return is_not_c1_osr_compilable() || is_not_c2_osr_compilable(); |
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803 if (is_c1_compile(comp_level)) |
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804 return is_not_c1_osr_compilable(); |
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805 if (is_c2_compile(comp_level)) |
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806 return is_not_c2_osr_compilable(); |
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807 return false; |
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808 } |
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809 |
7998 | 810 void Method::set_not_osr_compilable(int comp_level, bool report, const char* reason) { |
811 print_made_not_compilable(comp_level, /*is_osr*/ true, report, reason); | |
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812 if (comp_level == CompLevel_all) { |
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813 set_not_c1_osr_compilable(); |
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814 set_not_c2_osr_compilable(); |
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815 } else { |
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816 if (is_c1_compile(comp_level)) |
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817 set_not_c1_osr_compilable(); |
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818 if (is_c2_compile(comp_level)) |
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819 set_not_c2_osr_compilable(); |
0 | 820 } |
1783 | 821 CompilationPolicy::policy()->disable_compilation(this); |
12073 | 822 assert(!CompilationPolicy::can_be_osr_compiled(this, comp_level), "sanity check"); |
0 | 823 } |
824 | |
825 // Revert to using the interpreter and clear out the nmethod | |
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826 void Method::clear_code() { |
0 | 827 |
828 // this may be NULL if c2i adapters have not been made yet | |
829 // Only should happen at allocate time. | |
830 if (_adapter == NULL) { | |
831 _from_compiled_entry = NULL; | |
832 } else { | |
833 _from_compiled_entry = _adapter->get_c2i_entry(); | |
834 } | |
835 OrderAccess::storestore(); | |
836 _from_interpreted_entry = _i2i_entry; | |
837 OrderAccess::storestore(); | |
838 _code = NULL; | |
839 } | |
840 | |
841 // Called by class data sharing to remove any entry points (which are not shared) | |
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842 void Method::unlink_method() { |
0 | 843 _code = NULL; |
844 _i2i_entry = NULL; | |
845 _from_interpreted_entry = NULL; | |
846 if (is_native()) { | |
847 *native_function_addr() = NULL; | |
848 set_signature_handler(NULL); | |
849 } | |
850 NOT_PRODUCT(set_compiled_invocation_count(0);) | |
851 _adapter = NULL; | |
852 _from_compiled_entry = NULL; | |
8751
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853 |
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854 // In case of DumpSharedSpaces, _method_data should always be NULL. |
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855 // |
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856 // During runtime (!DumpSharedSpaces), when we are cleaning a |
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857 // shared class that failed to load, this->link_method() may |
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858 // have already been called (before an exception happened), so |
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859 // this->_method_data may not be NULL. |
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860 assert(!DumpSharedSpaces || _method_data == NULL, "unexpected method data?"); |
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861 |
0 | 862 set_method_data(NULL); |
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863 clear_method_counters(); |
0 | 864 } |
865 | |
866 // Called when the method_holder is getting linked. Setup entrypoints so the method | |
867 // is ready to be called from interpreter, compiler, and vtables. | |
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868 void Method::link_method(methodHandle h_method, TRAPS) { |
3748 | 869 // If the code cache is full, we may reenter this function for the |
870 // leftover methods that weren't linked. | |
871 if (_i2i_entry != NULL) return; | |
872 | |
0 | 873 assert(_adapter == NULL, "init'd to NULL" ); |
874 assert( _code == NULL, "nothing compiled yet" ); | |
875 | |
876 // Setup interpreter entrypoint | |
877 assert(this == h_method(), "wrong h_method()" ); | |
878 address entry = Interpreter::entry_for_method(h_method); | |
879 assert(entry != NULL, "interpreter entry must be non-null"); | |
880 // Sets both _i2i_entry and _from_interpreted_entry | |
881 set_interpreter_entry(entry); | |
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882 |
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883 // Don't overwrite already registered native entries. |
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884 if (is_native() && !has_native_function()) { |
0 | 885 set_native_function( |
886 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
887 !native_bind_event_is_interesting); | |
888 } | |
889 | |
890 // Setup compiler entrypoint. This is made eagerly, so we do not need | |
891 // special handling of vtables. An alternative is to make adapters more | |
892 // lazily by calling make_adapter() from from_compiled_entry() for the | |
893 // normal calls. For vtable calls life gets more complicated. When a | |
894 // call-site goes mega-morphic we need adapters in all methods which can be | |
895 // called from the vtable. We need adapters on such methods that get loaded | |
896 // later. Ditto for mega-morphic itable calls. If this proves to be a | |
897 // problem we'll make these lazily later. | |
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898 (void) make_adapters(h_method, CHECK); |
0 | 899 |
900 // ONLY USE the h_method now as make_adapter may have blocked | |
901 | |
902 } | |
903 | |
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904 address Method::make_adapters(methodHandle mh, TRAPS) { |
0 | 905 // Adapters for compiled code are made eagerly here. They are fairly |
906 // small (generally < 100 bytes) and quick to make (and cached and shared) | |
907 // so making them eagerly shouldn't be too expensive. | |
908 AdapterHandlerEntry* adapter = AdapterHandlerLibrary::get_adapter(mh); | |
909 if (adapter == NULL ) { | |
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910 THROW_MSG_NULL(vmSymbols::java_lang_VirtualMachineError(), "out of space in CodeCache for adapters"); |
0 | 911 } |
912 | |
913 mh->set_adapter_entry(adapter); | |
914 mh->_from_compiled_entry = adapter->get_c2i_entry(); | |
915 return adapter->get_c2i_entry(); | |
916 } | |
917 | |
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918 void Method::restore_unshareable_info(TRAPS) { |
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919 // Since restore_unshareable_info can be called more than once for a method, don't |
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920 // redo any work. If this field is restored, there is nothing to do. |
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921 if (_from_compiled_entry == NULL) { |
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922 // restore method's vtable by calling a virtual function |
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923 restore_vtable(); |
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924 |
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925 methodHandle mh(THREAD, this); |
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926 link_method(mh, CHECK); |
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927 } |
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928 } |
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929 |
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930 |
0 | 931 // The verified_code_entry() must be called when a invoke is resolved |
932 // on this method. | |
933 | |
934 // It returns the compiled code entry point, after asserting not null. | |
935 // This function is called after potential safepoints so that nmethod | |
936 // or adapter that it points to is still live and valid. | |
937 // This function must not hit a safepoint! | |
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938 address Method::verified_code_entry() { |
0 | 939 debug_only(No_Safepoint_Verifier nsv;) |
940 assert(_from_compiled_entry != NULL, "must be set"); | |
941 return _from_compiled_entry; | |
942 } | |
943 | |
944 // Check that if an nmethod ref exists, it has a backlink to this or no backlink at all | |
945 // (could be racing a deopt). | |
946 // Not inline to avoid circular ref. | |
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947 bool Method::check_code() const { |
0 | 948 // cached in a register or local. There's a race on the value of the field. |
949 nmethod *code = (nmethod *)OrderAccess::load_ptr_acquire(&_code); | |
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950 return code == NULL || (code->method() == NULL) || (code->method() == (Method*)this && !code->is_osr_method()); |
0 | 951 } |
952 | |
953 // Install compiled code. Instantly it can execute. | |
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954 void Method::set_code(methodHandle mh, nmethod *code) { |
0 | 955 assert( code, "use clear_code to remove code" ); |
956 assert( mh->check_code(), "" ); | |
957 | |
958 guarantee(mh->adapter() != NULL, "Adapter blob must already exist!"); | |
959 | |
960 // These writes must happen in this order, because the interpreter will | |
961 // directly jump to from_interpreted_entry which jumps to an i2c adapter | |
962 // which jumps to _from_compiled_entry. | |
963 mh->_code = code; // Assign before allowing compiled code to exec | |
964 | |
965 int comp_level = code->comp_level(); | |
966 // In theory there could be a race here. In practice it is unlikely | |
967 // and not worth worrying about. | |
1783 | 968 if (comp_level > mh->highest_comp_level()) { |
969 mh->set_highest_comp_level(comp_level); | |
0 | 970 } |
971 | |
972 OrderAccess::storestore(); | |
1692 | 973 #ifdef SHARK |
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974 mh->_from_interpreted_entry = code->insts_begin(); |
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975 #else //!SHARK |
0 | 976 mh->_from_compiled_entry = code->verified_entry_point(); |
977 OrderAccess::storestore(); | |
978 // Instantly compiled code can execute. | |
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979 if (!mh->is_method_handle_intrinsic()) |
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980 mh->_from_interpreted_entry = mh->get_i2c_entry(); |
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981 #endif //!SHARK |
0 | 982 } |
983 | |
984 | |
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985 bool Method::is_overridden_in(Klass* k) const { |
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986 InstanceKlass* ik = InstanceKlass::cast(k); |
0 | 987 |
988 if (ik->is_interface()) return false; | |
989 | |
990 // If method is an interface, we skip it - except if it | |
991 // is a miranda method | |
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992 if (method_holder()->is_interface()) { |
0 | 993 // Check that method is not a miranda method |
994 if (ik->lookup_method(name(), signature()) == NULL) { | |
995 // No implementation exist - so miranda method | |
996 return false; | |
997 } | |
998 return true; | |
999 } | |
1000 | |
1001 assert(ik->is_subclass_of(method_holder()), "should be subklass"); | |
1002 assert(ik->vtable() != NULL, "vtable should exist"); | |
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1003 if (!has_vtable_index()) { |
0 | 1004 return false; |
1005 } else { | |
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1006 Method* vt_m = ik->method_at_vtable(vtable_index()); |
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1007 return vt_m != this; |
0 | 1008 } |
1009 } | |
1010 | |
1011 | |
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1012 // give advice about whether this Method* should be cached or not |
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1013 bool Method::should_not_be_cached() const { |
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1014 if (is_old()) { |
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1015 // This method has been redefined. It is either EMCP or obsolete |
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1016 // and we don't want to cache it because that would pin the method |
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1017 // down and prevent it from being collectible if and when it |
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1018 // finishes executing. |
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1019 return true; |
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1020 } |
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1021 |
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1022 // caching this method should be just fine |
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1023 return false; |
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1024 } |
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1025 |
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1026 |
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1027 /** |
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1028 * Returns true if this is one of the specially treated methods for |
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1029 * security related stack walks (like Reflection.getCallerClass). |
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1030 */ |
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1031 bool Method::is_ignored_by_security_stack_walk() const { |
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1032 const bool use_new_reflection = JDK_Version::is_gte_jdk14x_version() && UseNewReflection; |
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1033 |
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1034 if (intrinsic_id() == vmIntrinsics::_invoke) { |
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1035 // This is Method.invoke() -- ignore it |
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1036 return true; |
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1037 } |
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1038 if (use_new_reflection && |
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1039 method_holder()->is_subclass_of(SystemDictionary::reflect_MethodAccessorImpl_klass())) { |
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1040 // This is an auxilary frame -- ignore it |
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1041 return true; |
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1042 } |
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1043 if (is_method_handle_intrinsic() || is_compiled_lambda_form()) { |
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1044 // This is an internal adapter frame for method handles -- ignore it |
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1045 return true; |
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1046 } |
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1047 return false; |
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1048 } |
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1049 |
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1050 |
710 | 1051 // Constant pool structure for invoke methods: |
1052 enum { | |
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1053 _imcp_invoke_name = 1, // utf8: 'invokeExact', etc. |
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1054 _imcp_invoke_signature, // utf8: (variable Symbol*) |
710 | 1055 _imcp_limit |
1056 }; | |
1057 | |
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1058 // Test if this method is an MH adapter frame generated by Java code. |
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1059 // Cf. java/lang/invoke/InvokerBytecodeGenerator |
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1060 bool Method::is_compiled_lambda_form() const { |
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1061 return intrinsic_id() == vmIntrinsics::_compiledLambdaForm; |
710 | 1062 } |
1063 | |
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1064 // Test if this method is an internal MH primitive method. |
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1065 bool Method::is_method_handle_intrinsic() const { |
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1066 vmIntrinsics::ID iid = intrinsic_id(); |
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1067 return (MethodHandles::is_signature_polymorphic(iid) && |
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1068 MethodHandles::is_signature_polymorphic_intrinsic(iid)); |
1152
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1069 } |
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1070 |
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1071 bool Method::has_member_arg() const { |
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1072 vmIntrinsics::ID iid = intrinsic_id(); |
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1073 return (MethodHandles::is_signature_polymorphic(iid) && |
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1074 MethodHandles::has_member_arg(iid)); |
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1075 } |
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1076 |
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1077 // Make an instance of a signature-polymorphic internal MH primitive. |
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1078 methodHandle Method::make_method_handle_intrinsic(vmIntrinsics::ID iid, |
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1079 Symbol* signature, |
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1080 TRAPS) { |
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1081 ResourceMark rm; |
710 | 1082 methodHandle empty; |
1083 | |
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1084 KlassHandle holder = SystemDictionary::MethodHandle_klass(); |
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1085 Symbol* name = MethodHandles::signature_polymorphic_intrinsic_name(iid); |
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1086 assert(iid == MethodHandles::signature_polymorphic_name_id(name), ""); |
710 | 1087 if (TraceMethodHandles) { |
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1088 tty->print_cr("make_method_handle_intrinsic MH.%s%s", name->as_C_string(), signature->as_C_string()); |
710 | 1089 } |
1090 | |
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1091 // invariant: cp->symbol_at_put is preceded by a refcount increment (more usually a lookup) |
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1092 name->increment_refcount(); |
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1093 signature->increment_refcount(); |
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1094 |
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1095 int cp_length = _imcp_limit; |
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1096 ClassLoaderData* loader_data = holder->class_loader_data(); |
710 | 1097 constantPoolHandle cp; |
1098 { | |
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1099 ConstantPool* cp_oop = ConstantPool::allocate(loader_data, cp_length, CHECK_(empty)); |
710 | 1100 cp = constantPoolHandle(THREAD, cp_oop); |
1101 } | |
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1102 cp->set_pool_holder(InstanceKlass::cast(holder())); |
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1103 cp->symbol_at_put(_imcp_invoke_name, name); |
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1104 cp->symbol_at_put(_imcp_invoke_signature, signature); |
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1105 cp->set_has_preresolution(); |
710 | 1106 |
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1107 // decide on access bits: public or not? |
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1108 int flags_bits = (JVM_ACC_NATIVE | JVM_ACC_SYNTHETIC | JVM_ACC_FINAL); |
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1109 bool must_be_static = MethodHandles::is_signature_polymorphic_static(iid); |
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1110 if (must_be_static) flags_bits |= JVM_ACC_STATIC; |
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1111 assert((flags_bits & JVM_ACC_PUBLIC) == 0, "do not expose these methods"); |
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1112 |
710 | 1113 methodHandle m; |
1114 { | |
8031 | 1115 InlineTableSizes sizes; |
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1116 Method* m_oop = Method::allocate(loader_data, 0, |
8031 | 1117 accessFlags_from(flags_bits), &sizes, |
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1118 ConstMethod::NORMAL, CHECK_(empty)); |
710 | 1119 m = methodHandle(THREAD, m_oop); |
1120 } | |
1121 m->set_constants(cp()); | |
1122 m->set_name_index(_imcp_invoke_name); | |
1123 m->set_signature_index(_imcp_invoke_signature); | |
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1124 assert(MethodHandles::is_signature_polymorphic_name(m->name()), ""); |
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1125 assert(m->signature() == signature, ""); |
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1126 ResultTypeFinder rtf(signature); |
23614 | 1127 m->constMethod()->set_result_type(rtf.type()); |
710 | 1128 m->compute_size_of_parameters(THREAD); |
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1129 m->init_intrinsic_id(); |
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1130 assert(m->is_method_handle_intrinsic(), ""); |
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1131 #ifdef ASSERT |
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1132 if (!MethodHandles::is_signature_polymorphic(m->intrinsic_id())) m->print(); |
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1133 assert(MethodHandles::is_signature_polymorphic(m->intrinsic_id()), "must be an invoker"); |
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1134 assert(m->intrinsic_id() == iid, "correctly predicted iid"); |
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1135 #endif //ASSERT |
710 | 1136 |
1137 // Finally, set up its entry points. | |
1138 assert(m->can_be_statically_bound(), ""); | |
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1139 m->set_vtable_index(Method::nonvirtual_vtable_index); |
710 | 1140 m->link_method(m, CHECK_(empty)); |
1141 | |
1039
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|
1142 if (TraceMethodHandles && (Verbose || WizardMode)) |
710 | 1143 m->print_on(tty); |
1144 | |
1145 return m; | |
1146 } | |
1147 | |
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1148 Klass* Method::check_non_bcp_klass(Klass* klass) { |
6983 | 1149 if (klass != NULL && klass->class_loader() != NULL) { |
1150 if (klass->oop_is_objArray()) | |
6831
d8ce2825b193
8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
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|
1151 klass = ObjArrayKlass::cast(klass)->bottom_klass(); |
3785
ddd894528dbc
7056328: JSR 292 invocation sometimes fails in adapters for types not on boot class path
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|
1152 return klass; |
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|
1153 } |
ddd894528dbc
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|
1154 return NULL; |
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|
1155 } |
710 | 1156 |
48
d8b3ef7ee3e5
6599425: 4/3 OopMapCache::lookup() can cause later crash or assert() failure
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diff
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|
1157 |
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1158 methodHandle Method::clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length, |
0 | 1159 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS) { |
1160 // Code below does not work for native methods - they should never get rewritten anyway | |
1161 assert(!m->is_native(), "cannot rewrite native methods"); | |
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1162 // Allocate new Method* |
0 | 1163 AccessFlags flags = m->access_flags(); |
8031 | 1164 |
1165 ConstMethod* cm = m->constMethod(); | |
1166 int checked_exceptions_len = cm->checked_exceptions_length(); | |
1167 int localvariable_len = cm->localvariable_table_length(); | |
1168 int exception_table_len = cm->exception_table_length(); | |
1169 int method_parameters_len = cm->method_parameters_length(); | |
1170 int method_annotations_len = cm->method_annotations_length(); | |
1171 int parameter_annotations_len = cm->parameter_annotations_length(); | |
1172 int type_annotations_len = cm->type_annotations_length(); | |
1173 int default_annotations_len = cm->default_annotations_length(); | |
1174 | |
1175 InlineTableSizes sizes( | |
1176 localvariable_len, | |
1177 new_compressed_linenumber_size, | |
1178 exception_table_len, | |
1179 checked_exceptions_len, | |
1180 method_parameters_len, | |
1181 cm->generic_signature_index(), | |
1182 method_annotations_len, | |
1183 parameter_annotations_len, | |
1184 type_annotations_len, | |
1185 default_annotations_len, | |
1186 0); | |
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1187 |
6934 | 1188 ClassLoaderData* loader_data = m->method_holder()->class_loader_data(); |
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1189 Method* newm_oop = Method::allocate(loader_data, |
6934 | 1190 new_code_length, |
1191 flags, | |
8031 | 1192 &sizes, |
6934 | 1193 m->method_type(), |
1194 CHECK_(methodHandle())); | |
0 | 1195 methodHandle newm (THREAD, newm_oop); |
1196 int new_method_size = newm->method_size(); | |
518
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|
1197 |
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1198 // Create a shallow copy of Method part, but be careful to preserve the new ConstMethod* |
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1199 ConstMethod* newcm = newm->constMethod(); |
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1200 int new_const_method_size = newm->constMethod()->size(); |
2226
c5a923563727
6912621: iCMS: Error: assert(_markBitMap.isMarked(addr + 1),"Missing Printezis bit?")
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|
1201 |
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1202 memcpy(newm(), m(), sizeof(Method)); |
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1203 |
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1204 // Create shallow copy of ConstMethod. |
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|
1205 memcpy(newcm, m->constMethod(), sizeof(ConstMethod)); |
2226
c5a923563727
6912621: iCMS: Error: assert(_markBitMap.isMarked(addr + 1),"Missing Printezis bit?")
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|
1206 |
0 | 1207 // Reset correct method/const method, method size, and parameter info |
1208 newm->set_constMethod(newcm); | |
1209 newm->constMethod()->set_code_size(new_code_length); | |
1210 newm->constMethod()->set_constMethod_size(new_const_method_size); | |
1211 newm->set_method_size(new_method_size); | |
1212 assert(newm->code_size() == new_code_length, "check"); | |
11159
16511b7e3d35
8019632: Method parameters are not copied in clone_with_new_data
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diff
changeset
|
1213 assert(newm->method_parameters_length() == method_parameters_len, "check"); |
0 | 1214 assert(newm->checked_exceptions_length() == checked_exceptions_len, "check"); |
6216
161ae369407d
7181632: nsk classLoad001_14 failure and CompileTheWorld crash after 7178145.
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6213
diff
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|
1215 assert(newm->exception_table_length() == exception_table_len, "check"); |
0 | 1216 assert(newm->localvariable_table_length() == localvariable_len, "check"); |
1217 // Copy new byte codes | |
1218 memcpy(newm->code_base(), new_code, new_code_length); | |
1219 // Copy line number table | |
1220 if (new_compressed_linenumber_size > 0) { | |
1221 memcpy(newm->compressed_linenumber_table(), | |
1222 new_compressed_linenumber_table, | |
1223 new_compressed_linenumber_size); | |
1224 } | |
11159
16511b7e3d35
8019632: Method parameters are not copied in clone_with_new_data
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|
1225 // Copy method_parameters |
16511b7e3d35
8019632: Method parameters are not copied in clone_with_new_data
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diff
changeset
|
1226 if (method_parameters_len > 0) { |
16511b7e3d35
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diff
changeset
|
1227 memcpy(newm->method_parameters_start(), |
16511b7e3d35
8019632: Method parameters are not copied in clone_with_new_data
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diff
changeset
|
1228 m->method_parameters_start(), |
16511b7e3d35
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11034
diff
changeset
|
1229 method_parameters_len * sizeof(MethodParametersElement)); |
16511b7e3d35
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emc
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|
1230 } |
0 | 1231 // Copy checked_exceptions |
1232 if (checked_exceptions_len > 0) { | |
1233 memcpy(newm->checked_exceptions_start(), | |
1234 m->checked_exceptions_start(), | |
1235 checked_exceptions_len * sizeof(CheckedExceptionElement)); | |
1236 } | |
6216
161ae369407d
7181632: nsk classLoad001_14 failure and CompileTheWorld crash after 7178145.
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diff
changeset
|
1237 // Copy exception table |
161ae369407d
7181632: nsk classLoad001_14 failure and CompileTheWorld crash after 7178145.
jiangli
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6213
diff
changeset
|
1238 if (exception_table_len > 0) { |
161ae369407d
7181632: nsk classLoad001_14 failure and CompileTheWorld crash after 7178145.
jiangli
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diff
changeset
|
1239 memcpy(newm->exception_table_start(), |
161ae369407d
7181632: nsk classLoad001_14 failure and CompileTheWorld crash after 7178145.
jiangli
parents:
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diff
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|
1240 m->exception_table_start(), |
161ae369407d
7181632: nsk classLoad001_14 failure and CompileTheWorld crash after 7178145.
jiangli
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changeset
|
1241 exception_table_len * sizeof(ExceptionTableElement)); |
161ae369407d
7181632: nsk classLoad001_14 failure and CompileTheWorld crash after 7178145.
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6213
diff
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|
1242 } |
0 | 1243 // Copy local variable number table |
1244 if (localvariable_len > 0) { | |
1245 memcpy(newm->localvariable_table_start(), | |
1246 m->localvariable_table_start(), | |
1247 localvariable_len * sizeof(LocalVariableTableElement)); | |
1248 } | |
6725
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|
1249 // Copy stackmap table |
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1250 if (m->has_stackmap_table()) { |
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1251 int code_attribute_length = m->stackmap_data()->length(); |
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|
1252 Array<u1>* stackmap_data = |
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|
1253 MetadataFactory::new_array<u1>(loader_data, code_attribute_length, 0, CHECK_NULL); |
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|
1254 memcpy((void*)stackmap_data->adr_at(0), |
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|
1255 (void*)m->stackmap_data()->adr_at(0), code_attribute_length); |
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|
1256 newm->set_stackmap_data(stackmap_data); |
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1257 } |
518
0af8b0718fc9
6692899: CMS: many vm.parallel_class_loading tests fail with assert "missing Printezis mark"
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196
diff
changeset
|
1258 |
8837
0c3ee6f1fa23
8009531: Crash when redefining class with annotated method
coleenp
parents:
8751
diff
changeset
|
1259 // copy annotations over to new method |
0c3ee6f1fa23
8009531: Crash when redefining class with annotated method
coleenp
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8751
diff
changeset
|
1260 newcm->copy_annotations_from(cm); |
0 | 1261 return newm; |
1262 } | |
1263 | |
6725
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|
1264 vmSymbols::SID Method::klass_id_for_intrinsics(Klass* holder) { |
0 | 1265 // if loader is not the default loader (i.e., != NULL), we can't know the intrinsics |
1266 // because we are not loading from core libraries | |
6894 | 1267 // exception: the AES intrinsics come from lib/ext/sunjce_provider.jar |
1268 // which does not use the class default class loader so we check for its loader here | |
8866
16885e702c88
7198429: need checked categorization of caller-sensitive methods in the JDK
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8751
diff
changeset
|
1269 InstanceKlass* ik = InstanceKlass::cast(holder); |
16885e702c88
7198429: need checked categorization of caller-sensitive methods in the JDK
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diff
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|
1270 if ((ik->class_loader() != NULL) && !SystemDictionary::is_ext_class_loader(ik->class_loader())) { |
856
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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|
1271 return vmSymbols::NO_SID; // regardless of name, no intrinsics here |
6894 | 1272 } |
0 | 1273 |
1274 // see if the klass name is well-known: | |
8866
16885e702c88
7198429: need checked categorization of caller-sensitive methods in the JDK
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parents:
8751
diff
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|
1275 Symbol* klass_name = ik->name(); |
856
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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diff
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|
1276 return vmSymbols::find_sid(klass_name); |
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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diff
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|
1277 } |
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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diff
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|
1278 |
6725
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|
1279 void Method::init_intrinsic_id() { |
856
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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changeset
|
1280 assert(_intrinsic_id == vmIntrinsics::_none, "do this just once"); |
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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diff
changeset
|
1281 const uintptr_t max_id_uint = right_n_bits((int)(sizeof(_intrinsic_id) * BitsPerByte)); |
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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diff
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|
1282 assert((uintptr_t)vmIntrinsics::ID_LIMIT <= max_id_uint, "else fix size"); |
1793
d257356e35f0
6939224: MethodHandle.invokeGeneric needs to perform the correct set of conversions
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1783
diff
changeset
|
1283 assert(intrinsic_id_size_in_bytes() == sizeof(_intrinsic_id), ""); |
856
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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parents:
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diff
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|
1284 |
75596850f863
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diff
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|
1285 // the klass name is well-known: |
75596850f863
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diff
changeset
|
1286 vmSymbols::SID klass_id = klass_id_for_intrinsics(method_holder()); |
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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|
1287 assert(klass_id != vmSymbols::NO_SID, "caller responsibility"); |
0 | 1288 |
1289 // ditto for method and signature: | |
1290 vmSymbols::SID name_id = vmSymbols::find_sid(name()); | |
6266
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7023639: JSR 292 method handle invocation needs a fast path for compiled code
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|
1291 if (klass_id != vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_MethodHandle) |
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7023639: JSR 292 method handle invocation needs a fast path for compiled code
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|
1292 && name_id == vmSymbols::NO_SID) |
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7023639: JSR 292 method handle invocation needs a fast path for compiled code
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|
1293 return; |
0 | 1294 vmSymbols::SID sig_id = vmSymbols::find_sid(signature()); |
2357
8033953d67ff
7012648: move JSR 292 to package java.lang.invoke and adjust names
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2356
diff
changeset
|
1295 if (klass_id != vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_MethodHandle) |
1793
d257356e35f0
6939224: MethodHandle.invokeGeneric needs to perform the correct set of conversions
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diff
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|
1296 && sig_id == vmSymbols::NO_SID) return; |
0 | 1297 jshort flags = access_flags().as_short(); |
1298 | |
856
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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changeset
|
1299 vmIntrinsics::ID id = vmIntrinsics::find_id(klass_id, name_id, sig_id, flags); |
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6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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diff
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|
1300 if (id != vmIntrinsics::_none) { |
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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diff
changeset
|
1301 set_intrinsic_id(id); |
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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diff
changeset
|
1302 return; |
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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diff
changeset
|
1303 } |
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diff
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|
1304 |
0 | 1305 // A few slightly irregular cases: |
1306 switch (klass_id) { | |
1307 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_StrictMath): | |
1308 // Second chance: check in regular Math. | |
1309 switch (name_id) { | |
1310 case vmSymbols::VM_SYMBOL_ENUM_NAME(min_name): | |
1311 case vmSymbols::VM_SYMBOL_ENUM_NAME(max_name): | |
1312 case vmSymbols::VM_SYMBOL_ENUM_NAME(sqrt_name): | |
1313 // pretend it is the corresponding method in the non-strict class: | |
1314 klass_id = vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_Math); | |
856
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changeset
|
1315 id = vmIntrinsics::find_id(klass_id, name_id, sig_id, flags); |
0 | 1316 break; |
1317 } | |
1507
cd5dbf694d45
6939134: JSR 292 adjustments to method handle invocation
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1506
diff
changeset
|
1318 break; |
cd5dbf694d45
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1506
diff
changeset
|
1319 |
cd5dbf694d45
6939134: JSR 292 adjustments to method handle invocation
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diff
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|
1320 // Signature-polymorphic methods: MethodHandle.invoke*, InvokeDynamic.*. |
2357
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7012648: move JSR 292 to package java.lang.invoke and adjust names
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2356
diff
changeset
|
1321 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_MethodHandle): |
6266
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7023639: JSR 292 method handle invocation needs a fast path for compiled code
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|
1322 if (!is_native()) break; |
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|
1323 id = MethodHandles::signature_polymorphic_name_id(method_holder(), name()); |
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|
1324 if (is_static() != MethodHandles::is_signature_polymorphic_static(id)) |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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6216
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|
1325 id = vmIntrinsics::_none; |
1507
cd5dbf694d45
6939134: JSR 292 adjustments to method handle invocation
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1506
diff
changeset
|
1326 break; |
0 | 1327 } |
1328 | |
856
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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diff
changeset
|
1329 if (id != vmIntrinsics::_none) { |
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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726
diff
changeset
|
1330 // Set up its iid. It is an alias method. |
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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diff
changeset
|
1331 set_intrinsic_id(id); |
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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diff
changeset
|
1332 return; |
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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diff
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|
1333 } |
0 | 1334 } |
1335 | |
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1336 // These two methods are static since a GC may move the Method |
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1337 bool Method::load_signature_classes(methodHandle m, TRAPS) { |
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1338 if (THREAD->is_Compiler_thread()) { |
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1339 // There is nothing useful this routine can do from within the Compile thread. |
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1340 // Hopefully, the signature contains only well-known classes. |
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1341 // We could scan for this and return true/false, but the caller won't care. |
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1342 return false; |
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1343 } |
0 | 1344 bool sig_is_loaded = true; |
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1345 Handle class_loader(THREAD, m->method_holder()->class_loader()); |
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1346 Handle protection_domain(THREAD, m->method_holder()->protection_domain()); |
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1347 ResourceMark rm(THREAD); |
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1348 Symbol* signature = m->signature(); |
0 | 1349 for(SignatureStream ss(signature); !ss.is_done(); ss.next()) { |
1350 if (ss.is_object()) { | |
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1351 Symbol* sym = ss.as_symbol(CHECK_(false)); |
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1352 Symbol* name = sym; |
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1353 Klass* klass = SystemDictionary::resolve_or_null(name, class_loader, |
0 | 1354 protection_domain, THREAD); |
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1355 // We are loading classes eagerly. If a ClassNotFoundException or |
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1356 // a LinkageError was generated, be sure to ignore it. |
0 | 1357 if (HAS_PENDING_EXCEPTION) { |
1142 | 1358 if (PENDING_EXCEPTION->is_a(SystemDictionary::ClassNotFoundException_klass()) || |
1359 PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) { | |
0 | 1360 CLEAR_PENDING_EXCEPTION; |
1361 } else { | |
1362 return false; | |
1363 } | |
1364 } | |
1365 if( klass == NULL) { sig_is_loaded = false; } | |
1366 } | |
1367 } | |
1368 return sig_is_loaded; | |
1369 } | |
1370 | |
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1371 bool Method::has_unloaded_classes_in_signature(methodHandle m, TRAPS) { |
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1372 Handle class_loader(THREAD, m->method_holder()->class_loader()); |
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1373 Handle protection_domain(THREAD, m->method_holder()->protection_domain()); |
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1374 ResourceMark rm(THREAD); |
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1375 Symbol* signature = m->signature(); |
0 | 1376 for(SignatureStream ss(signature); !ss.is_done(); ss.next()) { |
1377 if (ss.type() == T_OBJECT) { | |
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1378 Symbol* name = ss.as_symbol_or_null(); |
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1379 if (name == NULL) return true; |
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1380 Klass* klass = SystemDictionary::find(name, class_loader, protection_domain, THREAD); |
0 | 1381 if (klass == NULL) return true; |
1382 } | |
1383 } | |
1384 return false; | |
1385 } | |
1386 | |
1387 // Exposed so field engineers can debug VM | |
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1388 void Method::print_short_name(outputStream* st) { |
0 | 1389 ResourceMark rm; |
1390 #ifdef PRODUCT | |
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1391 st->print(" %s::", method_holder()->external_name()); |
0 | 1392 #else |
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1393 st->print(" %s::", method_holder()->internal_name()); |
0 | 1394 #endif |
1395 name()->print_symbol_on(st); | |
1396 if (WizardMode) signature()->print_symbol_on(st); | |
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1397 else if (MethodHandles::is_signature_polymorphic(intrinsic_id())) |
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1398 MethodHandles::print_as_basic_type_signature_on(st, signature(), true); |
0 | 1399 } |
1400 | |
3779 | 1401 // Comparer for sorting an object array containing |
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1402 // Method*s. |
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1403 static int method_comparator(Method* a, Method* b) { |
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1404 return a->name()->fast_compare(b->name()); |
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1405 } |
0 | 1406 |
1407 // This is only done during class loading, so it is OK to assume method_idnum matches the methods() array | |
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1408 // default_methods also uses this without the ordering for fast find_method |
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1409 void Method::sort_methods(Array<Method*>* methods, bool idempotent, bool set_idnums) { |
0 | 1410 int length = methods->length(); |
1411 if (length > 1) { | |
3779 | 1412 { |
1413 No_Safepoint_Verifier nsv; | |
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1414 QuickSort::sort<Method*>(methods->data(), length, method_comparator, idempotent); |
0 | 1415 } |
1416 // Reset method ordering | |
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1417 if (set_idnums) { |
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1418 for (int i = 0; i < length; i++) { |
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1419 Method* m = methods->at(i); |
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1420 m->set_method_idnum(i); |
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1421 m->set_orig_method_idnum(i); |
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1422 } |
0 | 1423 } |
1424 } | |
1425 } | |
1426 | |
1427 //----------------------------------------------------------------------------------- | |
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1428 // Non-product code unless JVM/TI needs it |
0 | 1429 |
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1430 #if !defined(PRODUCT) || INCLUDE_JVMTI |
0 | 1431 class SignatureTypePrinter : public SignatureTypeNames { |
1432 private: | |
1433 outputStream* _st; | |
1434 bool _use_separator; | |
1435 | |
1436 void type_name(const char* name) { | |
1437 if (_use_separator) _st->print(", "); | |
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1438 _st->print("%s", name); |
0 | 1439 _use_separator = true; |
1440 } | |
1441 | |
1442 public: | |
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1443 SignatureTypePrinter(Symbol* signature, outputStream* st) : SignatureTypeNames(signature) { |
0 | 1444 _st = st; |
1445 _use_separator = false; | |
1446 } | |
1447 | |
1448 void print_parameters() { _use_separator = false; iterate_parameters(); } | |
1449 void print_returntype() { _use_separator = false; iterate_returntype(); } | |
1450 }; | |
1451 | |
1452 | |
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1453 void Method::print_name(outputStream* st) { |
0 | 1454 Thread *thread = Thread::current(); |
1455 ResourceMark rm(thread); | |
1456 SignatureTypePrinter sig(signature(), st); | |
1457 st->print("%s ", is_static() ? "static" : "virtual"); | |
1458 sig.print_returntype(); | |
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1459 st->print(" %s.", method_holder()->internal_name()); |
0 | 1460 name()->print_symbol_on(st); |
1461 st->print("("); | |
1462 sig.print_parameters(); | |
1463 st->print(")"); | |
1464 } | |
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1465 #endif // !PRODUCT || INCLUDE_JVMTI |
0 | 1466 |
1467 | |
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1468 //----------------------------------------------------------------------------------- |
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1469 // Non-product code |
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1470 |
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1471 #ifndef PRODUCT |
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1472 void Method::print_codes_on(outputStream* st) const { |
0 | 1473 print_codes_on(0, code_size(), st); |
1474 } | |
1475 | |
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1476 void Method::print_codes_on(int from, int to, outputStream* st) const { |
0 | 1477 Thread *thread = Thread::current(); |
1478 ResourceMark rm(thread); | |
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1479 methodHandle mh (thread, (Method*)this); |
0 | 1480 BytecodeStream s(mh); |
1481 s.set_interval(from, to); | |
1482 BytecodeTracer::set_closure(BytecodeTracer::std_closure()); | |
1483 while (s.next() >= 0) BytecodeTracer::trace(mh, s.bcp(), st); | |
1484 } | |
1485 #endif // not PRODUCT | |
1486 | |
1487 | |
1488 // Simple compression of line number tables. We use a regular compressed stream, except that we compress deltas | |
1489 // between (bci,line) pairs since they are smaller. If (bci delta, line delta) fits in (5-bit unsigned, 3-bit unsigned) | |
1490 // we save it as one byte, otherwise we write a 0xFF escape character and use regular compression. 0x0 is used | |
1491 // as end-of-stream terminator. | |
1492 | |
1493 void CompressedLineNumberWriteStream::write_pair_regular(int bci_delta, int line_delta) { | |
1494 // bci and line number does not compress into single byte. | |
1495 // Write out escape character and use regular compression for bci and line number. | |
1496 write_byte((jubyte)0xFF); | |
1497 write_signed_int(bci_delta); | |
1498 write_signed_int(line_delta); | |
1499 } | |
1500 | |
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1501 // See comment in method.hpp which explains why this exists. |
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1502 #if defined(_M_AMD64) && _MSC_VER >= 1400 |
0 | 1503 #pragma optimize("", off) |
1504 void CompressedLineNumberWriteStream::write_pair(int bci, int line) { | |
1505 write_pair_inline(bci, line); | |
1506 } | |
1507 #pragma optimize("", on) | |
1508 #endif | |
1509 | |
1510 CompressedLineNumberReadStream::CompressedLineNumberReadStream(u_char* buffer) : CompressedReadStream(buffer) { | |
1511 _bci = 0; | |
1512 _line = 0; | |
1513 }; | |
1514 | |
1515 | |
1516 bool CompressedLineNumberReadStream::read_pair() { | |
1517 jubyte next = read_byte(); | |
1518 // Check for terminator | |
1519 if (next == 0) return false; | |
1520 if (next == 0xFF) { | |
1521 // Escape character, regular compression used | |
1522 _bci += read_signed_int(); | |
1523 _line += read_signed_int(); | |
1524 } else { | |
1525 // Single byte compression used | |
1526 _bci += next >> 3; | |
1527 _line += next & 0x7; | |
1528 } | |
1529 return true; | |
1530 } | |
1531 | |
1532 | |
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1533 Bytecodes::Code Method::orig_bytecode_at(int bci) const { |
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1534 BreakpointInfo* bp = method_holder()->breakpoints(); |
0 | 1535 for (; bp != NULL; bp = bp->next()) { |
1536 if (bp->match(this, bci)) { | |
1537 return bp->orig_bytecode(); | |
1538 } | |
1539 } | |
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1540 { |
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1541 ResourceMark rm; |
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1542 fatal(err_msg("no original bytecode found in %s at bci %d", name_and_sig_as_C_string(), bci)); |
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1543 } |
0 | 1544 return Bytecodes::_shouldnotreachhere; |
1545 } | |
1546 | |
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1547 void Method::set_orig_bytecode_at(int bci, Bytecodes::Code code) { |
0 | 1548 assert(code != Bytecodes::_breakpoint, "cannot patch breakpoints this way"); |
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1549 BreakpointInfo* bp = method_holder()->breakpoints(); |
0 | 1550 for (; bp != NULL; bp = bp->next()) { |
1551 if (bp->match(this, bci)) { | |
1552 bp->set_orig_bytecode(code); | |
1553 // and continue, in case there is more than one | |
1554 } | |
1555 } | |
1556 } | |
1557 | |
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1558 void Method::set_breakpoint(int bci) { |
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1559 InstanceKlass* ik = method_holder(); |
0 | 1560 BreakpointInfo *bp = new BreakpointInfo(this, bci); |
1561 bp->set_next(ik->breakpoints()); | |
1562 ik->set_breakpoints(bp); | |
1563 // do this last: | |
1564 bp->set(this); | |
1565 } | |
1566 | |
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1567 static void clear_matches(Method* m, int bci) { |
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1568 InstanceKlass* ik = m->method_holder(); |
0 | 1569 BreakpointInfo* prev_bp = NULL; |
1570 BreakpointInfo* next_bp; | |
1571 for (BreakpointInfo* bp = ik->breakpoints(); bp != NULL; bp = next_bp) { | |
1572 next_bp = bp->next(); | |
1573 // bci value of -1 is used to delete all breakpoints in method m (ex: clear_all_breakpoint). | |
1574 if (bci >= 0 ? bp->match(m, bci) : bp->match(m)) { | |
1575 // do this first: | |
1576 bp->clear(m); | |
1577 // unhook it | |
1578 if (prev_bp != NULL) | |
1579 prev_bp->set_next(next_bp); | |
1580 else | |
1581 ik->set_breakpoints(next_bp); | |
1582 delete bp; | |
1583 // When class is redefined JVMTI sets breakpoint in all versions of EMCP methods | |
1584 // at same location. So we have multiple matching (method_index and bci) | |
1585 // BreakpointInfo nodes in BreakpointInfo list. We should just delete one | |
1586 // breakpoint for clear_breakpoint request and keep all other method versions | |
1587 // BreakpointInfo for future clear_breakpoint request. | |
1588 // bcivalue of -1 is used to clear all breakpoints (see clear_all_breakpoints) | |
1589 // which is being called when class is unloaded. We delete all the Breakpoint | |
1590 // information for all versions of method. We may not correctly restore the original | |
1591 // bytecode in all method versions, but that is ok. Because the class is being unloaded | |
1592 // so these methods won't be used anymore. | |
1593 if (bci >= 0) { | |
1594 break; | |
1595 } | |
1596 } else { | |
1597 // This one is a keeper. | |
1598 prev_bp = bp; | |
1599 } | |
1600 } | |
1601 } | |
1602 | |
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1603 void Method::clear_breakpoint(int bci) { |
0 | 1604 assert(bci >= 0, ""); |
1605 clear_matches(this, bci); | |
1606 } | |
1607 | |
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1608 void Method::clear_all_breakpoints() { |
0 | 1609 clear_matches(this, -1); |
1610 } | |
1611 | |
1612 | |
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1613 int Method::invocation_count() { |
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1614 MethodCounters *mcs = method_counters(); |
1783 | 1615 if (TieredCompilation) { |
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1616 MethodData* const mdo = method_data(); |
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1617 if (((mcs != NULL) ? mcs->invocation_counter()->carry() : false) || |
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1618 ((mdo != NULL) ? mdo->invocation_counter()->carry() : false)) { |
1783 | 1619 return InvocationCounter::count_limit; |
1620 } else { | |
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1621 return ((mcs != NULL) ? mcs->invocation_counter()->count() : 0) + |
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1622 ((mdo != NULL) ? mdo->invocation_counter()->count() : 0); |
1783 | 1623 } |
1624 } else { | |
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1625 return (mcs == NULL) ? 0 : mcs->invocation_counter()->count(); |
1783 | 1626 } |
1627 } | |
1628 | |
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1629 int Method::backedge_count() { |
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1630 MethodCounters *mcs = method_counters(); |
1783 | 1631 if (TieredCompilation) { |
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1632 MethodData* const mdo = method_data(); |
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1633 if (((mcs != NULL) ? mcs->backedge_counter()->carry() : false) || |
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1634 ((mdo != NULL) ? mdo->backedge_counter()->carry() : false)) { |
1783 | 1635 return InvocationCounter::count_limit; |
1636 } else { | |
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1637 return ((mcs != NULL) ? mcs->backedge_counter()->count() : 0) + |
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1638 ((mdo != NULL) ? mdo->backedge_counter()->count() : 0); |
1783 | 1639 } |
1640 } else { | |
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1641 return (mcs == NULL) ? 0 : mcs->backedge_counter()->count(); |
1783 | 1642 } |
1643 } | |
1644 | |
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1645 int Method::highest_comp_level() const { |
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1646 const MethodCounters* mcs = method_counters(); |
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1647 if (mcs != NULL) { |
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1648 return mcs->highest_comp_level(); |
1783 | 1649 } else { |
1650 return CompLevel_none; | |
1651 } | |
1652 } | |
1653 | |
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1654 int Method::highest_osr_comp_level() const { |
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1655 const MethodCounters* mcs = method_counters(); |
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1656 if (mcs != NULL) { |
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1657 return mcs->highest_osr_comp_level(); |
1783 | 1658 } else { |
1659 return CompLevel_none; | |
1660 } | |
1661 } | |
1662 | |
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1663 void Method::set_highest_comp_level(int level) { |
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1664 MethodCounters* mcs = method_counters(); |
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1665 if (mcs != NULL) { |
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1666 mcs->set_highest_comp_level(level); |
1783 | 1667 } |
1668 } | |
1669 | |
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1670 void Method::set_highest_osr_comp_level(int level) { |
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1671 MethodCounters* mcs = method_counters(); |
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1672 if (mcs != NULL) { |
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1673 mcs->set_highest_osr_comp_level(level); |
1783 | 1674 } |
1675 } | |
1676 | |
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1677 BreakpointInfo::BreakpointInfo(Method* m, int bci) { |
0 | 1678 _bci = bci; |
1679 _name_index = m->name_index(); | |
1680 _signature_index = m->signature_index(); | |
1681 _orig_bytecode = (Bytecodes::Code) *m->bcp_from(_bci); | |
1682 if (_orig_bytecode == Bytecodes::_breakpoint) | |
1683 _orig_bytecode = m->orig_bytecode_at(_bci); | |
1684 _next = NULL; | |
1685 } | |
1686 | |
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1687 void BreakpointInfo::set(Method* method) { |
0 | 1688 #ifdef ASSERT |
1689 { | |
1690 Bytecodes::Code code = (Bytecodes::Code) *method->bcp_from(_bci); | |
1691 if (code == Bytecodes::_breakpoint) | |
1692 code = method->orig_bytecode_at(_bci); | |
1693 assert(orig_bytecode() == code, "original bytecode must be the same"); | |
1694 } | |
1695 #endif | |
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1696 Thread *thread = Thread::current(); |
0 | 1697 *method->bcp_from(_bci) = Bytecodes::_breakpoint; |
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1698 method->incr_number_of_breakpoints(thread); |
0 | 1699 SystemDictionary::notice_modification(); |
1700 { | |
1701 // Deoptimize all dependents on this method | |
1702 HandleMark hm(thread); | |
1703 methodHandle mh(thread, method); | |
1704 Universe::flush_dependents_on_method(mh); | |
1705 } | |
1706 } | |
1707 | |
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1708 void BreakpointInfo::clear(Method* method) { |
0 | 1709 *method->bcp_from(_bci) = orig_bytecode(); |
1710 assert(method->number_of_breakpoints() > 0, "must not go negative"); | |
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1711 method->decr_number_of_breakpoints(Thread::current()); |
0 | 1712 } |
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1713 |
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1714 // jmethodID handling |
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1715 |
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1716 // This is a block allocating object, sort of like JNIHandleBlock, only a |
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1717 // lot simpler. There aren't many of these, they aren't long, they are rarely |
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1718 // deleted and so we can do some suboptimal things. |
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1719 // It's allocated on the CHeap because once we allocate a jmethodID, we can |
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1720 // never get rid of it. |
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1721 // It would be nice to be able to parameterize the number of methods for |
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1722 // the null_class_loader but then we'd have to turn this and ClassLoaderData |
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1723 // into templates. |
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1724 |
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1725 // I feel like this brain dead class should exist somewhere in the STL |
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1726 |
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1727 class JNIMethodBlock : public CHeapObj<mtClass> { |
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1728 enum { number_of_methods = 8 }; |
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1729 |
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1730 Method* _methods[number_of_methods]; |
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1731 int _top; |
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1732 JNIMethodBlock* _next; |
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1733 public: |
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1734 static Method* const _free_method; |
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1735 |
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1736 JNIMethodBlock() : _next(NULL), _top(0) { |
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1737 for (int i = 0; i< number_of_methods; i++) _methods[i] = _free_method; |
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1738 } |
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1739 |
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1740 Method** add_method(Method* m) { |
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1741 if (_top < number_of_methods) { |
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1742 // top points to the next free entry. |
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1743 int i = _top; |
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1744 _methods[i] = m; |
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1745 _top++; |
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1746 return &_methods[i]; |
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1747 } else if (_top == number_of_methods) { |
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1748 // if the next free entry ran off the block see if there's a free entry |
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1749 for (int i = 0; i< number_of_methods; i++) { |
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1750 if (_methods[i] == _free_method) { |
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1751 _methods[i] = m; |
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1752 return &_methods[i]; |
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1753 } |
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1754 } |
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1755 // Only check each block once for frees. They're very unlikely. |
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1756 // Increment top past the end of the block. |
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1757 _top++; |
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1758 } |
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1759 // need to allocate a next block. |
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1760 if (_next == NULL) { |
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1761 _next = new JNIMethodBlock(); |
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1762 } |
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1763 return _next->add_method(m); |
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1764 } |
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1765 |
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1766 bool contains(Method** m) { |
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1767 for (JNIMethodBlock* b = this; b != NULL; b = b->_next) { |
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1768 for (int i = 0; i< number_of_methods; i++) { |
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1769 if (&(b->_methods[i]) == m) { |
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1770 return true; |
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1771 } |
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1772 } |
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1773 } |
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1774 return false; // not found |
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1775 } |
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1776 |
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1777 // Doesn't really destroy it, just marks it as free so it can be reused. |
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1778 void destroy_method(Method** m) { |
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1779 #ifdef ASSERT |
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1780 assert(contains(m), "should be a methodID"); |
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1781 #endif // ASSERT |
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1782 *m = _free_method; |
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1783 } |
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1784 |
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1785 // During class unloading the methods are cleared, which is different |
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1786 // than freed. |
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1787 void clear_all_methods() { |
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1788 for (JNIMethodBlock* b = this; b != NULL; b = b->_next) { |
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1789 for (int i = 0; i< number_of_methods; i++) { |
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1790 _methods[i] = NULL; |
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1791 } |
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1792 } |
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1793 } |
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1794 #ifndef PRODUCT |
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1795 int count_methods() { |
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1796 // count all allocated methods |
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1797 int count = 0; |
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1798 for (JNIMethodBlock* b = this; b != NULL; b = b->_next) { |
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1799 for (int i = 0; i< number_of_methods; i++) { |
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1800 if (_methods[i] != _free_method) count++; |
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1801 } |
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1802 } |
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1803 return count; |
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1804 } |
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1805 #endif // PRODUCT |
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1806 }; |
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1807 |
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1808 // Something that can't be mistaken for an address or a markOop |
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1809 Method* const JNIMethodBlock::_free_method = (Method*)55; |
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1810 |
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1811 // Add a method id to the jmethod_ids |
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1812 jmethodID Method::make_jmethod_id(ClassLoaderData* loader_data, Method* m) { |
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1813 ClassLoaderData* cld = loader_data; |
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1814 |
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1815 if (!SafepointSynchronize::is_at_safepoint()) { |
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1816 // Have to add jmethod_ids() to class loader data thread-safely. |
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1817 // Also have to add the method to the list safely, which the cld lock |
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1818 // protects as well. |
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1819 MutexLockerEx ml(cld->metaspace_lock(), Mutex::_no_safepoint_check_flag); |
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1820 if (cld->jmethod_ids() == NULL) { |
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1821 cld->set_jmethod_ids(new JNIMethodBlock()); |
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1822 } |
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1823 // jmethodID is a pointer to Method* |
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1824 return (jmethodID)cld->jmethod_ids()->add_method(m); |
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1825 } else { |
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1826 // At safepoint, we are single threaded and can set this. |
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1827 if (cld->jmethod_ids() == NULL) { |
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1828 cld->set_jmethod_ids(new JNIMethodBlock()); |
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1829 } |
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1830 // jmethodID is a pointer to Method* |
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1831 return (jmethodID)cld->jmethod_ids()->add_method(m); |
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1832 } |
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1833 } |
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1834 |
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1835 // Mark a jmethodID as free. This is called when there is a data race in |
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1836 // InstanceKlass while creating the jmethodID cache. |
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1837 void Method::destroy_jmethod_id(ClassLoaderData* loader_data, jmethodID m) { |
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1838 ClassLoaderData* cld = loader_data; |
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1839 Method** ptr = (Method**)m; |
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1840 assert(cld->jmethod_ids() != NULL, "should have method handles"); |
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1841 cld->jmethod_ids()->destroy_method(ptr); |
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1842 } |
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1843 |
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1844 void Method::change_method_associated_with_jmethod_id(jmethodID jmid, Method* new_method) { |
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1845 // Can't assert the method_holder is the same because the new method has the |
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1846 // scratch method holder. |
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1847 assert(resolve_jmethod_id(jmid)->method_holder()->class_loader() |
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1848 == new_method->method_holder()->class_loader(), |
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1849 "changing to a different class loader"); |
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1850 // Just change the method in place, jmethodID pointer doesn't change. |
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1851 *((Method**)jmid) = new_method; |
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1852 } |
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1853 |
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1854 bool Method::is_method_id(jmethodID mid) { |
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1855 Method* m = resolve_jmethod_id(mid); |
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1856 assert(m != NULL, "should be called with non-null method"); |
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1857 InstanceKlass* ik = m->method_holder(); |
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1858 ClassLoaderData* cld = ik->class_loader_data(); |
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1859 if (cld->jmethod_ids() == NULL) return false; |
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1860 return (cld->jmethod_ids()->contains((Method**)mid)); |
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1861 } |
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1862 |
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1863 Method* Method::checked_resolve_jmethod_id(jmethodID mid) { |
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1864 if (mid == NULL) return NULL; |
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1865 Method* o = resolve_jmethod_id(mid); |
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1866 if (o == NULL || o == JNIMethodBlock::_free_method || !((Metadata*)o)->is_method()) { |
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1867 return NULL; |
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1868 } |
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1869 return o; |
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1870 }; |
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1871 |
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1872 void Method::set_on_stack(const bool value) { |
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1873 // Set both the method itself and its constant pool. The constant pool |
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1874 // on stack means some method referring to it is also on the stack. |
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1875 constants()->set_on_stack(value); |
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1876 |
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1877 bool succeeded = _access_flags.set_on_stack(value); |
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1878 if (value && succeeded) { |
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1879 MetadataOnStackMark::record(this, Thread::current()); |
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1880 } |
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1881 } |
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1882 |
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1883 // Called when the class loader is unloaded to make all methods weak. |
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1884 void Method::clear_jmethod_ids(ClassLoaderData* loader_data) { |
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1885 loader_data->jmethod_ids()->clear_all_methods(); |
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1886 } |
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1887 |
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1888 bool Method::has_method_vptr(const void* ptr) { |
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1889 Method m; |
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1890 // This assumes that the vtbl pointer is the first word of a C++ object. |
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1891 // This assumption is also in universe.cpp patch_klass_vtble |
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1892 void* vtbl2 = dereference_vptr((const void*)&m); |
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1893 void* this_vtbl = dereference_vptr(ptr); |
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1894 return vtbl2 == this_vtbl; |
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1895 } |
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1896 |
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1897 // Check that this pointer is valid by checking that the vtbl pointer matches |
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1898 bool Method::is_valid_method() const { |
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1899 if (this == NULL) { |
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1900 return false; |
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1901 } else if (!is_metaspace_object()) { |
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1902 return false; |
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1903 } else { |
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1904 return has_method_vptr((const void*)this); |
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1905 } |
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1906 } |
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1907 |
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1908 #ifndef PRODUCT |
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1909 void Method::print_jmethod_ids(ClassLoaderData* loader_data, outputStream* out) { |
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1910 out->print_cr("jni_method_id count = %d", loader_data->jmethod_ids()->count_methods()); |
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1911 } |
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1912 #endif // PRODUCT |
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1913 |
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1914 |
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1915 // Printing |
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1916 |
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1917 #ifndef PRODUCT |
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1918 |
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1919 void Method::print_on(outputStream* st) const { |
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1920 ResourceMark rm; |
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1921 assert(is_method(), "must be method"); |
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1922 st->print_cr("%s", internal_name()); |
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1923 // get the effect of PrintOopAddress, always, for methods: |
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1924 st->print_cr(" - this oop: "INTPTR_FORMAT, (intptr_t)this); |
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1925 st->print (" - method holder: "); method_holder()->print_value_on(st); st->cr(); |
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1926 st->print (" - constants: "INTPTR_FORMAT" ", (address)constants()); |
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1927 constants()->print_value_on(st); st->cr(); |
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1928 st->print (" - access: 0x%x ", access_flags().as_int()); access_flags().print_on(st); st->cr(); |
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1929 st->print (" - name: "); name()->print_value_on(st); st->cr(); |
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1930 st->print (" - signature: "); signature()->print_value_on(st); st->cr(); |
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1931 st->print_cr(" - max stack: %d", max_stack()); |
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1932 st->print_cr(" - max locals: %d", max_locals()); |
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1933 st->print_cr(" - size of params: %d", size_of_parameters()); |
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1934 st->print_cr(" - method size: %d", method_size()); |
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1935 if (intrinsic_id() != vmIntrinsics::_none) |
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1936 st->print_cr(" - intrinsic id: %d %s", intrinsic_id(), vmIntrinsics::name_at(intrinsic_id())); |
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1937 if (highest_comp_level() != CompLevel_none) |
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1938 st->print_cr(" - highest level: %d", highest_comp_level()); |
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1939 st->print_cr(" - vtable index: %d", _vtable_index); |
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1940 st->print_cr(" - i2i entry: " INTPTR_FORMAT, interpreter_entry()); |
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1941 st->print( " - adapters: "); |
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1942 AdapterHandlerEntry* a = ((Method*)this)->adapter(); |
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1943 if (a == NULL) |
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1944 st->print_cr(INTPTR_FORMAT, a); |
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1945 else |
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1946 a->print_adapter_on(st); |
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1947 st->print_cr(" - compiled entry " INTPTR_FORMAT, from_compiled_entry()); |
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1948 st->print_cr(" - code size: %d", code_size()); |
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1949 if (code_size() != 0) { |
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1950 st->print_cr(" - code start: " INTPTR_FORMAT, code_base()); |
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1951 st->print_cr(" - code end (excl): " INTPTR_FORMAT, code_base() + code_size()); |
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1952 } |
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1953 if (method_data() != NULL) { |
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1954 st->print_cr(" - method data: " INTPTR_FORMAT, (address)method_data()); |
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1955 } |
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1956 st->print_cr(" - checked ex length: %d", checked_exceptions_length()); |
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1957 if (checked_exceptions_length() > 0) { |
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1958 CheckedExceptionElement* table = checked_exceptions_start(); |
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1959 st->print_cr(" - checked ex start: " INTPTR_FORMAT, table); |
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1960 if (Verbose) { |
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1961 for (int i = 0; i < checked_exceptions_length(); i++) { |
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1962 st->print_cr(" - throws %s", constants()->printable_name_at(table[i].class_cp_index)); |
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1963 } |
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1964 } |
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1965 } |
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1966 if (has_linenumber_table()) { |
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1967 u_char* table = compressed_linenumber_table(); |
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1968 st->print_cr(" - linenumber start: " INTPTR_FORMAT, table); |
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1969 if (Verbose) { |
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1970 CompressedLineNumberReadStream stream(table); |
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1971 while (stream.read_pair()) { |
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1972 st->print_cr(" - line %d: %d", stream.line(), stream.bci()); |
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1973 } |
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1974 } |
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1975 } |
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1976 st->print_cr(" - localvar length: %d", localvariable_table_length()); |
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1977 if (localvariable_table_length() > 0) { |
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1978 LocalVariableTableElement* table = localvariable_table_start(); |
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1979 st->print_cr(" - localvar start: " INTPTR_FORMAT, table); |
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1980 if (Verbose) { |
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1981 for (int i = 0; i < localvariable_table_length(); i++) { |
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1982 int bci = table[i].start_bci; |
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1983 int len = table[i].length; |
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1984 const char* name = constants()->printable_name_at(table[i].name_cp_index); |
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1985 const char* desc = constants()->printable_name_at(table[i].descriptor_cp_index); |
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1986 int slot = table[i].slot; |
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1987 st->print_cr(" - %s %s bci=%d len=%d slot=%d", desc, name, bci, len, slot); |
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1988 } |
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1989 } |
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1990 } |
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1991 if (code() != NULL) { |
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1992 st->print (" - compiled code: "); |
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1993 code()->print_value_on(st); |
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1994 } |
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1995 if (is_native()) { |
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1996 st->print_cr(" - native function: " INTPTR_FORMAT, native_function()); |
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1997 st->print_cr(" - signature handler: " INTPTR_FORMAT, signature_handler()); |
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1998 } |
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1999 } |
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2000 |
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2001 #endif //PRODUCT |
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2002 |
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2003 void Method::print_value_on(outputStream* st) const { |
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2004 assert(is_method(), "must be method"); |
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2005 st->print("%s", internal_name()); |
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2006 print_address_on(st); |
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2007 st->print(" "); |
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2008 name()->print_value_on(st); |
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2009 st->print(" "); |
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2010 signature()->print_value_on(st); |
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2011 st->print(" in "); |
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2012 method_holder()->print_value_on(st); |
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2013 if (WizardMode) st->print("#%d", _vtable_index); |
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2014 if (WizardMode) st->print("[%d,%d]", size_of_parameters(), max_locals()); |
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2015 if (WizardMode && code() != NULL) st->print(" ((nmethod*)%p)", code()); |
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2016 } |
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2017 |
7956 | 2018 #if INCLUDE_SERVICES |
2019 // Size Statistics | |
2020 void Method::collect_statistics(KlassSizeStats *sz) const { | |
2021 int mysize = sz->count(this); | |
2022 sz->_method_bytes += mysize; | |
2023 sz->_method_all_bytes += mysize; | |
2024 sz->_rw_bytes += mysize; | |
2025 | |
2026 if (constMethod()) { | |
2027 constMethod()->collect_statistics(sz); | |
2028 } | |
2029 if (method_data()) { | |
2030 method_data()->collect_statistics(sz); | |
2031 } | |
2032 } | |
2033 #endif // INCLUDE_SERVICES | |
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2034 |
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2035 // Verification |
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2036 |
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2037 void Method::verify_on(outputStream* st) { |
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2038 guarantee(is_method(), "object must be method"); |
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2039 guarantee(constants()->is_constantPool(), "should be constant pool"); |
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2040 guarantee(constMethod()->is_constMethod(), "should be ConstMethod*"); |
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2041 MethodData* md = method_data(); |
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2042 guarantee(md == NULL || |
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2043 md->is_methodData(), "should be method data"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6267
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2044 } |