Mercurial > hg > truffle
annotate src/share/vm/oops/method.cpp @ 21097:391f94d4d23f
Move MatchProcessor and HotSpotVMConfigPorcessor to their own projects
author | Gilles Duboscq <gilles.m.duboscq@oracle.com> |
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date | Thu, 23 Apr 2015 14:48:52 +0200 |
parents | 7848fc12602b |
children | be896a1983c0 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
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26 #include "classfile/metadataOnStackMark.hpp" |
1972 | 27 #include "classfile/systemDictionary.hpp" |
28 #include "code/debugInfoRec.hpp" | |
29 #include "gc_interface/collectedHeap.inline.hpp" | |
30 #include "interpreter/bytecodeStream.hpp" | |
31 #include "interpreter/bytecodeTracer.hpp" | |
32 #include "interpreter/bytecodes.hpp" | |
33 #include "interpreter/interpreter.hpp" | |
34 #include "interpreter/oopMapCache.hpp" | |
35 #include "memory/gcLocker.hpp" | |
36 #include "memory/generation.hpp" | |
7956 | 37 #include "memory/heapInspection.hpp" |
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38 #include "memory/metadataFactory.hpp" |
1972 | 39 #include "memory/oopFactory.hpp" |
6934 | 40 #include "oops/constMethod.hpp" |
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41 #include "oops/methodData.hpp" |
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42 #include "oops/method.hpp" |
1972 | 43 #include "oops/oop.inline.hpp" |
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44 #include "oops/symbol.hpp" |
1972 | 45 #include "prims/jvmtiExport.hpp" |
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46 #include "prims/methodHandles.hpp" |
1972 | 47 #include "prims/nativeLookup.hpp" |
48 #include "runtime/arguments.hpp" | |
49 #include "runtime/compilationPolicy.hpp" | |
50 #include "runtime/frame.inline.hpp" | |
51 #include "runtime/handles.inline.hpp" | |
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52 #include "runtime/orderAccess.inline.hpp" |
1972 | 53 #include "runtime/relocator.hpp" |
54 #include "runtime/sharedRuntime.hpp" | |
55 #include "runtime/signature.hpp" | |
3779 | 56 #include "utilities/quickSort.hpp" |
1972 | 57 #include "utilities/xmlstream.hpp" |
0 | 58 |
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59 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
0 | 60 |
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61 // Implementation of Method |
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62 |
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63 Method* Method::allocate(ClassLoaderData* loader_data, |
6934 | 64 int byte_code_size, |
65 AccessFlags access_flags, | |
8031 | 66 InlineTableSizes* sizes, |
6934 | 67 ConstMethod::MethodType method_type, |
68 TRAPS) { | |
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69 assert(!access_flags.is_native() || byte_code_size == 0, |
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70 "native methods should not contain byte codes"); |
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71 ConstMethod* cm = ConstMethod::allocate(loader_data, |
6934 | 72 byte_code_size, |
8031 | 73 sizes, |
6934 | 74 method_type, |
75 CHECK_NULL); | |
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76 |
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77 int size = Method::size(access_flags.is_native()); |
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78 |
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79 return new (loader_data, size, false, MetaspaceObj::MethodType, THREAD) Method(cm, access_flags, size); |
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80 } |
0 | 81 |
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82 Method::Method(ConstMethod* xconst, AccessFlags access_flags, int size) { |
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83 No_Safepoint_Verifier no_safepoint; |
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84 set_constMethod(xconst); |
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85 set_access_flags(access_flags); |
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86 set_method_size(size); |
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87 #ifdef CC_INTERP |
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88 set_result_index(T_VOID); |
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89 #endif |
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90 set_intrinsic_id(vmIntrinsics::_none); |
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91 set_jfr_towrite(false); |
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92 set_force_inline(false); |
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93 set_hidden(false); |
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94 set_dont_inline(false); |
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95 set_method_data(NULL); |
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96 clear_method_counters(); |
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97 set_vtable_index(Method::garbage_vtable_index); |
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98 |
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99 // Fix and bury in Method* |
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100 set_interpreter_entry(NULL); // sets i2i entry and from_int |
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101 set_adapter_entry(NULL); |
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102 clear_code(); // from_c/from_i get set to c2i/i2i |
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103 |
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104 if (access_flags.is_native()) { |
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105 clear_native_function(); |
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106 set_signature_handler(NULL); |
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107 } |
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108 |
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109 NOT_PRODUCT(set_compiled_invocation_count(0);) |
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110 } |
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111 |
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112 // Release Method*. The nmethod will be gone when we get here because |
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113 // we've walked the code cache. |
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114 void Method::deallocate_contents(ClassLoaderData* loader_data) { |
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115 MetadataFactory::free_metadata(loader_data, constMethod()); |
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116 set_constMethod(NULL); |
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117 MetadataFactory::free_metadata(loader_data, method_data()); |
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118 set_method_data(NULL); |
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119 MetadataFactory::free_metadata(loader_data, method_counters()); |
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120 clear_method_counters(); |
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121 // The nmethod will be gone when we get here. |
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122 if (code() != NULL) _code = NULL; |
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123 } |
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124 |
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125 address Method::get_i2c_entry() { |
0 | 126 assert(_adapter != NULL, "must have"); |
127 return _adapter->get_i2c_entry(); | |
128 } | |
129 | |
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130 address Method::get_c2i_entry() { |
0 | 131 assert(_adapter != NULL, "must have"); |
132 return _adapter->get_c2i_entry(); | |
133 } | |
134 | |
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135 address Method::get_c2i_unverified_entry() { |
0 | 136 assert(_adapter != NULL, "must have"); |
137 return _adapter->get_c2i_unverified_entry(); | |
138 } | |
139 | |
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140 char* Method::name_and_sig_as_C_string() const { |
6983 | 141 return name_and_sig_as_C_string(constants()->pool_holder(), name(), signature()); |
0 | 142 } |
143 | |
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144 char* Method::name_and_sig_as_C_string(char* buf, int size) const { |
6983 | 145 return name_and_sig_as_C_string(constants()->pool_holder(), name(), signature(), buf, size); |
0 | 146 } |
147 | |
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148 char* Method::name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature) { |
0 | 149 const char* klass_name = klass->external_name(); |
150 int klass_name_len = (int)strlen(klass_name); | |
151 int method_name_len = method_name->utf8_length(); | |
152 int len = klass_name_len + 1 + method_name_len + signature->utf8_length(); | |
153 char* dest = NEW_RESOURCE_ARRAY(char, len + 1); | |
154 strcpy(dest, klass_name); | |
155 dest[klass_name_len] = '.'; | |
156 strcpy(&dest[klass_name_len + 1], method_name->as_C_string()); | |
157 strcpy(&dest[klass_name_len + 1 + method_name_len], signature->as_C_string()); | |
158 dest[len] = 0; | |
159 return dest; | |
160 } | |
161 | |
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162 char* Method::name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size) { |
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163 Symbol* klass_name = klass->name(); |
0 | 164 klass_name->as_klass_external_name(buf, size); |
165 int len = (int)strlen(buf); | |
166 | |
167 if (len < size - 1) { | |
168 buf[len++] = '.'; | |
169 | |
170 method_name->as_C_string(&(buf[len]), size - len); | |
171 len = (int)strlen(buf); | |
172 | |
173 signature->as_C_string(&(buf[len]), size - len); | |
174 } | |
175 | |
176 return buf; | |
177 } | |
178 | |
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179 int Method::fast_exception_handler_bci_for(methodHandle mh, KlassHandle ex_klass, int throw_bci, TRAPS) { |
0 | 180 // exception table holds quadruple entries of the form (beg_bci, end_bci, handler_bci, klass_index) |
181 // access exception table | |
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182 ExceptionTable table(mh()); |
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183 int length = table.length(); |
0 | 184 // iterate through all entries sequentially |
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185 constantPoolHandle pool(THREAD, mh->constants()); |
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186 for (int i = 0; i < length; i ++) { |
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187 //reacquire the table in case a GC happened |
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188 ExceptionTable table(mh()); |
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189 int beg_bci = table.start_pc(i); |
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190 int end_bci = table.end_pc(i); |
0 | 191 assert(beg_bci <= end_bci, "inconsistent exception table"); |
192 if (beg_bci <= throw_bci && throw_bci < end_bci) { | |
193 // exception handler bci range covers throw_bci => investigate further | |
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194 int handler_bci = table.handler_pc(i); |
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195 int klass_index = table.catch_type_index(i); |
0 | 196 if (klass_index == 0) { |
197 return handler_bci; | |
198 } else if (ex_klass.is_null()) { | |
199 return handler_bci; | |
200 } else { | |
201 // we know the exception class => get the constraint class | |
202 // this may require loading of the constraint class; if verification | |
203 // fails or some other exception occurs, return handler_bci | |
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204 Klass* k = pool->klass_at(klass_index, CHECK_(handler_bci)); |
0 | 205 KlassHandle klass = KlassHandle(THREAD, k); |
206 assert(klass.not_null(), "klass not loaded"); | |
207 if (ex_klass->is_subtype_of(klass())) { | |
208 return handler_bci; | |
209 } | |
210 } | |
211 } | |
212 } | |
213 | |
214 return -1; | |
215 } | |
216 | |
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217 void Method::mask_for(int bci, InterpreterOopMap* mask) { |
0 | 218 |
219 Thread* myThread = Thread::current(); | |
220 methodHandle h_this(myThread, this); | |
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221 #if defined(ASSERT) && !defined(GRAAL) |
0 | 222 bool has_capability = myThread->is_VM_thread() || |
223 myThread->is_ConcurrentGC_thread() || | |
224 myThread->is_GC_task_thread(); | |
225 | |
226 if (!has_capability) { | |
227 if (!VerifyStack && !VerifyLastFrame) { | |
228 // verify stack calls this outside VM thread | |
229 warning("oopmap should only be accessed by the " | |
230 "VM, GC task or CMS threads (or during debugging)"); | |
231 InterpreterOopMap local_mask; | |
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232 method_holder()->mask_for(h_this, bci, &local_mask); |
0 | 233 local_mask.print(); |
234 } | |
235 } | |
236 #endif | |
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237 method_holder()->mask_for(h_this, bci, mask); |
0 | 238 return; |
239 } | |
240 | |
241 | |
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242 int Method::bci_from(address bcp) const { |
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243 #ifdef ASSERT |
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244 { ResourceMark rm; |
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245 assert(is_native() && bcp == code_base() || contains(bcp) || is_error_reported(), |
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246 err_msg("bcp doesn't belong to this method: bcp: " INTPTR_FORMAT ", method: %s", bcp, name_and_sig_as_C_string())); |
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247 } |
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248 #endif |
0 | 249 return bcp - code_base(); |
250 } | |
251 | |
252 | |
253 // Return (int)bcx if it appears to be a valid BCI. | |
254 // Return bci_from((address)bcx) if it appears to be a valid BCP. | |
255 // Return -1 otherwise. | |
256 // Used by profiling code, when invalid data is a possibility. | |
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257 // The caller is responsible for validating the Method* itself. |
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258 int Method::validate_bci_from_bcx(intptr_t bcx) const { |
0 | 259 // keep bci as -1 if not a valid bci |
260 int bci = -1; | |
261 if (bcx == 0 || (address)bcx == code_base()) { | |
262 // code_size() may return 0 and we allow 0 here | |
263 // the method may be native | |
264 bci = 0; | |
265 } else if (frame::is_bci(bcx)) { | |
266 if (bcx < code_size()) { | |
267 bci = (int)bcx; | |
268 } | |
269 } else if (contains((address)bcx)) { | |
270 bci = (address)bcx - code_base(); | |
271 } | |
272 // Assert that if we have dodged any asserts, bci is negative. | |
273 assert(bci == -1 || bci == bci_from(bcp_from(bci)), "sane bci if >=0"); | |
274 return bci; | |
275 } | |
276 | |
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277 address Method::bcp_from(int bci) const { |
17780 | 278 assert((is_native() && bci == 0) || (!is_native() && 0 <= bci && bci < code_size()), err_msg("illegal bci: %d", bci)); |
0 | 279 address bcp = code_base() + bci; |
280 assert(is_native() && bcp == code_base() || contains(bcp), "bcp doesn't belong to this method"); | |
281 return bcp; | |
282 } | |
283 | |
284 | |
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285 int Method::size(bool is_native) { |
0 | 286 // If native, then include pointers for native_function and signature_handler |
287 int extra_bytes = (is_native) ? 2*sizeof(address*) : 0; | |
288 int extra_words = align_size_up(extra_bytes, BytesPerWord) / BytesPerWord; | |
289 return align_object_size(header_size() + extra_words); | |
290 } | |
291 | |
292 | |
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293 Symbol* Method::klass_name() const { |
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294 Klass* k = method_holder(); |
0 | 295 assert(k->is_klass(), "must be klass"); |
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296 InstanceKlass* ik = (InstanceKlass*) k; |
0 | 297 return ik->name(); |
298 } | |
299 | |
300 | |
301 // Attempt to return method oop to original state. Clear any pointers | |
302 // (to objects outside the shared spaces). We won't be able to predict | |
303 // where they should point in a new JVM. Further initialize some | |
304 // entries now in order allow them to be write protected later. | |
305 | |
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306 void Method::remove_unshareable_info() { |
0 | 307 unlink_method(); |
308 } | |
309 | |
310 | |
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311 bool Method::was_executed_more_than(int n) { |
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312 // Invocation counter is reset when the Method* is compiled. |
0 | 313 // If the method has compiled code we therefore assume it has |
314 // be excuted more than n times. | |
315 if (is_accessor() || is_empty_method() || (code() != NULL)) { | |
316 // interpreter doesn't bump invocation counter of trivial methods | |
317 // compiler does not bump invocation counter of compiled methods | |
318 return true; | |
1783 | 319 } |
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320 else if ((method_counters() != NULL && |
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321 method_counters()->invocation_counter()->carry()) || |
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322 (method_data() != NULL && |
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323 method_data()->invocation_counter()->carry())) { |
0 | 324 // The carry bit is set when the counter overflows and causes |
325 // a compilation to occur. We don't know how many times | |
326 // the counter has been reset, so we simply assume it has | |
327 // been executed more than n times. | |
328 return true; | |
329 } else { | |
330 return invocation_count() > n; | |
331 } | |
332 } | |
333 | |
334 #ifndef PRODUCT | |
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335 void Method::print_invocation_count() { |
0 | 336 if (is_static()) tty->print("static "); |
337 if (is_final()) tty->print("final "); | |
338 if (is_synchronized()) tty->print("synchronized "); | |
339 if (is_native()) tty->print("native "); | |
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340 method_holder()->name()->print_symbol_on(tty); |
0 | 341 tty->print("."); |
342 name()->print_symbol_on(tty); | |
343 signature()->print_symbol_on(tty); | |
344 | |
345 if (WizardMode) { | |
346 // dump the size of the byte codes | |
347 tty->print(" {%d}", code_size()); | |
348 } | |
349 tty->cr(); | |
350 | |
351 tty->print_cr (" interpreter_invocation_count: %8d ", interpreter_invocation_count()); | |
352 tty->print_cr (" invocation_counter: %8d ", invocation_count()); | |
353 tty->print_cr (" backedge_counter: %8d ", backedge_count()); | |
354 if (CountCompiledCalls) { | |
355 tty->print_cr (" compiled_invocation_count: %8d ", compiled_invocation_count()); | |
356 } | |
357 | |
358 } | |
359 #endif | |
360 | |
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361 // Build a MethodData* object to hold information about this method |
0 | 362 // collected in the interpreter. |
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363 void Method::build_interpreter_method_data(methodHandle method, TRAPS) { |
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364 // Do not profile method if current thread holds the pending list lock, |
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365 // which avoids deadlock for acquiring the MethodData_lock. |
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366 if (InstanceRefKlass::owns_pending_list_lock((JavaThread*)THREAD)) { |
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367 return; |
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368 } |
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369 |
0 | 370 // Grab a lock here to prevent multiple |
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371 // MethodData*s from being created. |
0 | 372 MutexLocker ml(MethodData_lock, THREAD); |
373 if (method->method_data() == NULL) { | |
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374 ClassLoaderData* loader_data = method->method_holder()->class_loader_data(); |
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375 MethodData* method_data = MethodData::allocate(loader_data, method, CHECK); |
0 | 376 method->set_method_data(method_data); |
377 if (PrintMethodData && (Verbose || WizardMode)) { | |
378 ResourceMark rm(THREAD); | |
379 tty->print("build_interpreter_method_data for "); | |
380 method->print_name(tty); | |
381 tty->cr(); | |
382 // At the end of the run, the MDO, full of data, will be dumped. | |
383 } | |
384 } | |
385 } | |
386 | |
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387 MethodCounters* Method::build_method_counters(Method* m, TRAPS) { |
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388 methodHandle mh(m); |
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389 ClassLoaderData* loader_data = mh->method_holder()->class_loader_data(); |
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390 MethodCounters* counters = MethodCounters::allocate(loader_data, CHECK_NULL); |
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391 if (!mh->init_method_counters(counters)) { |
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392 MetadataFactory::free_metadata(loader_data, counters); |
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393 } |
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394 return mh->method_counters(); |
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395 } |
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396 |
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397 void Method::cleanup_inline_caches() { |
0 | 398 // The current system doesn't use inline caches in the interpreter |
399 // => nothing to do (keep this method around for future use) | |
400 } | |
401 | |
402 | |
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403 int Method::extra_stack_words() { |
710 | 404 // not an inline function, to avoid a header dependency on Interpreter |
1506 | 405 return extra_stack_entries() * Interpreter::stackElementSize; |
710 | 406 } |
407 | |
408 | |
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409 void Method::compute_size_of_parameters(Thread *thread) { |
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410 ArgumentSizeComputer asc(signature()); |
0 | 411 set_size_of_parameters(asc.size() + (is_static() ? 0 : 1)); |
412 } | |
413 | |
414 #ifdef CC_INTERP | |
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415 void Method::set_result_index(BasicType type) { |
0 | 416 _result_index = Interpreter::BasicType_as_index(type); |
417 } | |
418 #endif | |
419 | |
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420 BasicType Method::result_type() const { |
0 | 421 ResultTypeFinder rtf(signature()); |
422 return rtf.type(); | |
423 } | |
424 | |
425 | |
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426 bool Method::is_empty_method() const { |
0 | 427 return code_size() == 1 |
428 && *code_base() == Bytecodes::_return; | |
429 } | |
430 | |
431 | |
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432 bool Method::is_vanilla_constructor() const { |
0 | 433 // Returns true if this method is a vanilla constructor, i.e. an "<init>" "()V" method |
434 // which only calls the superclass vanilla constructor and possibly does stores of | |
435 // zero constants to local fields: | |
436 // | |
437 // aload_0 | |
438 // invokespecial | |
439 // indexbyte1 | |
440 // indexbyte2 | |
441 // | |
442 // followed by an (optional) sequence of: | |
443 // | |
444 // aload_0 | |
445 // aconst_null / iconst_0 / fconst_0 / dconst_0 | |
446 // putfield | |
447 // indexbyte1 | |
448 // indexbyte2 | |
449 // | |
450 // followed by: | |
451 // | |
452 // return | |
453 | |
454 assert(name() == vmSymbols::object_initializer_name(), "Should only be called for default constructors"); | |
455 assert(signature() == vmSymbols::void_method_signature(), "Should only be called for default constructors"); | |
456 int size = code_size(); | |
457 // Check if size match | |
458 if (size == 0 || size % 5 != 0) return false; | |
459 address cb = code_base(); | |
460 int last = size - 1; | |
461 if (cb[0] != Bytecodes::_aload_0 || cb[1] != Bytecodes::_invokespecial || cb[last] != Bytecodes::_return) { | |
462 // Does not call superclass default constructor | |
463 return false; | |
464 } | |
465 // Check optional sequence | |
466 for (int i = 4; i < last; i += 5) { | |
467 if (cb[i] != Bytecodes::_aload_0) return false; | |
468 if (!Bytecodes::is_zero_const(Bytecodes::cast(cb[i+1]))) return false; | |
469 if (cb[i+2] != Bytecodes::_putfield) return false; | |
470 } | |
471 return true; | |
472 } | |
473 | |
474 | |
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475 bool Method::compute_has_loops_flag() { |
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476 BytecodeStream bcs(this); |
0 | 477 Bytecodes::Code bc; |
478 | |
479 while ((bc = bcs.next()) >= 0) { | |
480 switch( bc ) { | |
481 case Bytecodes::_ifeq: | |
482 case Bytecodes::_ifnull: | |
483 case Bytecodes::_iflt: | |
484 case Bytecodes::_ifle: | |
485 case Bytecodes::_ifne: | |
486 case Bytecodes::_ifnonnull: | |
487 case Bytecodes::_ifgt: | |
488 case Bytecodes::_ifge: | |
489 case Bytecodes::_if_icmpeq: | |
490 case Bytecodes::_if_icmpne: | |
491 case Bytecodes::_if_icmplt: | |
492 case Bytecodes::_if_icmpgt: | |
493 case Bytecodes::_if_icmple: | |
494 case Bytecodes::_if_icmpge: | |
495 case Bytecodes::_if_acmpeq: | |
496 case Bytecodes::_if_acmpne: | |
497 case Bytecodes::_goto: | |
498 case Bytecodes::_jsr: | |
499 if( bcs.dest() < bcs.next_bci() ) _access_flags.set_has_loops(); | |
500 break; | |
501 | |
502 case Bytecodes::_goto_w: | |
503 case Bytecodes::_jsr_w: | |
504 if( bcs.dest_w() < bcs.next_bci() ) _access_flags.set_has_loops(); | |
505 break; | |
506 } | |
507 } | |
508 _access_flags.set_loops_flag_init(); | |
509 return _access_flags.has_loops(); | |
510 } | |
511 | |
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512 bool Method::is_final_method(AccessFlags class_access_flags) const { |
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513 // or "does_not_require_vtable_entry" |
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514 // default method or overpass can occur, is not final (reuses vtable entry) |
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515 // private methods get vtable entries for backward class compatibility. |
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516 if (is_overpass() || is_default_method()) return false; |
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517 return is_final() || class_access_flags.is_final(); |
0 | 518 } |
519 | |
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520 bool Method::is_final_method() const { |
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521 return is_final_method(method_holder()->access_flags()); |
0 | 522 } |
523 | |
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524 bool Method::is_default_method() const { |
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525 if (method_holder() != NULL && |
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526 method_holder()->is_interface() && |
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527 !is_abstract()) { |
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528 return true; |
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529 } else { |
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530 return false; |
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531 } |
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532 } |
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533 |
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534 bool Method::can_be_statically_bound(AccessFlags class_access_flags) const { |
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535 if (is_final_method(class_access_flags)) return true; |
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536 #ifdef ASSERT |
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537 ResourceMark rm; |
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538 bool is_nonv = (vtable_index() == nonvirtual_vtable_index); |
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539 if (class_access_flags.is_interface()) { |
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540 assert(is_nonv == is_static(), err_msg("is_nonv=%s", name_and_sig_as_C_string())); |
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541 } |
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542 #endif |
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543 assert(valid_vtable_index() || valid_itable_index(), "method must be linked before we ask this question"); |
0 | 544 return vtable_index() == nonvirtual_vtable_index; |
545 } | |
546 | |
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547 bool Method::can_be_statically_bound() const { |
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548 return can_be_statically_bound(method_holder()->access_flags()); |
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549 } |
0 | 550 |
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551 bool Method::is_accessor() const { |
0 | 552 if (code_size() != 5) return false; |
553 if (size_of_parameters() != 1) return false; | |
2142 | 554 if (java_code_at(0) != Bytecodes::_aload_0 ) return false; |
555 if (java_code_at(1) != Bytecodes::_getfield) return false; | |
556 if (java_code_at(4) != Bytecodes::_areturn && | |
557 java_code_at(4) != Bytecodes::_ireturn ) return false; | |
0 | 558 return true; |
559 } | |
560 | |
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561 bool Method::is_constant_getter() const { |
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562 int last_index = code_size() - 1; |
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563 // Check if the first 1-3 bytecodes are a constant push |
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564 // and the last bytecode is a return. |
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565 return (2 <= code_size() && code_size() <= 4 && |
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566 Bytecodes::is_const(java_code_at(0)) && |
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567 Bytecodes::length_for(java_code_at(0)) == last_index && |
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568 Bytecodes::is_return(java_code_at(last_index))); |
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569 } |
0 | 570 |
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571 bool Method::is_initializer() const { |
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572 return name() == vmSymbols::object_initializer_name() || is_static_initializer(); |
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573 } |
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574 |
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575 bool Method::has_valid_initializer_flags() const { |
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576 return (is_static() || |
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577 method_holder()->major_version() < 51); |
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578 } |
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579 |
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580 bool Method::is_static_initializer() const { |
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581 // For classfiles version 51 or greater, ensure that the clinit method is |
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582 // static. Non-static methods with the name "<clinit>" are not static |
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583 // initializers. (older classfiles exempted for backward compatibility) |
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584 return name() == vmSymbols::class_initializer_name() && |
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585 has_valid_initializer_flags(); |
0 | 586 } |
587 | |
588 | |
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589 objArrayHandle Method::resolved_checked_exceptions_impl(Method* this_oop, TRAPS) { |
0 | 590 int length = this_oop->checked_exceptions_length(); |
591 if (length == 0) { // common case | |
592 return objArrayHandle(THREAD, Universe::the_empty_class_klass_array()); | |
593 } else { | |
594 methodHandle h_this(THREAD, this_oop); | |
1142 | 595 objArrayOop m_oop = oopFactory::new_objArray(SystemDictionary::Class_klass(), length, CHECK_(objArrayHandle())); |
0 | 596 objArrayHandle mirrors (THREAD, m_oop); |
597 for (int i = 0; i < length; i++) { | |
598 CheckedExceptionElement* table = h_this->checked_exceptions_start(); // recompute on each iteration, not gc safe | |
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599 Klass* k = h_this->constants()->klass_at(table[i].class_cp_index, CHECK_(objArrayHandle())); |
6983 | 600 assert(k->is_subclass_of(SystemDictionary::Throwable_klass()), "invalid exception class"); |
601 mirrors->obj_at_put(i, k->java_mirror()); | |
0 | 602 } |
603 return mirrors; | |
604 } | |
605 }; | |
606 | |
607 | |
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608 int Method::line_number_from_bci(int bci) const { |
0 | 609 if (bci == SynchronizationEntryBCI) bci = 0; |
610 assert(bci == 0 || 0 <= bci && bci < code_size(), "illegal bci"); | |
611 int best_bci = 0; | |
612 int best_line = -1; | |
613 | |
614 if (has_linenumber_table()) { | |
615 // The line numbers are a short array of 2-tuples [start_pc, line_number]. | |
616 // Not necessarily sorted and not necessarily one-to-one. | |
617 CompressedLineNumberReadStream stream(compressed_linenumber_table()); | |
618 while (stream.read_pair()) { | |
619 if (stream.bci() == bci) { | |
620 // perfect match | |
621 return stream.line(); | |
622 } else { | |
623 // update best_bci/line | |
624 if (stream.bci() < bci && stream.bci() >= best_bci) { | |
625 best_bci = stream.bci(); | |
626 best_line = stream.line(); | |
627 } | |
628 } | |
629 } | |
630 } | |
631 return best_line; | |
632 } | |
633 | |
634 | |
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635 bool Method::is_klass_loaded_by_klass_index(int klass_index) const { |
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636 if( constants()->tag_at(klass_index).is_unresolved_klass() ) { |
0 | 637 Thread *thread = Thread::current(); |
6123
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638 Symbol* klass_name = constants()->klass_name_at(klass_index); |
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639 Handle loader(thread, method_holder()->class_loader()); |
6983 | 640 Handle prot (thread, method_holder()->protection_domain()); |
0 | 641 return SystemDictionary::find(klass_name, loader, prot, thread) != NULL; |
642 } else { | |
643 return true; | |
644 } | |
645 } | |
646 | |
647 | |
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648 bool Method::is_klass_loaded(int refinfo_index, bool must_be_resolved) const { |
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649 int klass_index = constants()->klass_ref_index_at(refinfo_index); |
0 | 650 if (must_be_resolved) { |
651 // Make sure klass is resolved in constantpool. | |
652 if (constants()->tag_at(klass_index).is_unresolved_klass()) return false; | |
653 } | |
654 return is_klass_loaded_by_klass_index(klass_index); | |
655 } | |
656 | |
657 | |
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658 void Method::set_native_function(address function, bool post_event_flag) { |
0 | 659 assert(function != NULL, "use clear_native_function to unregister natives"); |
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660 assert(!is_method_handle_intrinsic() || function == SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), ""); |
0 | 661 address* native_function = native_function_addr(); |
662 | |
663 // We can see racers trying to place the same native function into place. Once | |
664 // is plenty. | |
665 address current = *native_function; | |
666 if (current == function) return; | |
667 if (post_event_flag && JvmtiExport::should_post_native_method_bind() && | |
668 function != NULL) { | |
669 // native_method_throw_unsatisfied_link_error_entry() should only | |
670 // be passed when post_event_flag is false. | |
671 assert(function != | |
672 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
673 "post_event_flag mis-match"); | |
674 | |
675 // post the bind event, and possible change the bind function | |
676 JvmtiExport::post_native_method_bind(this, &function); | |
677 } | |
678 *native_function = function; | |
679 // This function can be called more than once. We must make sure that we always | |
680 // use the latest registered method -> check if a stub already has been generated. | |
681 // If so, we have to make it not_entrant. | |
682 nmethod* nm = code(); // Put it into local variable to guard against concurrent updates | |
683 if (nm != NULL) { | |
684 nm->make_not_entrant(); | |
685 } | |
686 } | |
687 | |
688 | |
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689 bool Method::has_native_function() const { |
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7187290: nightly failures after JSR 292 lazy method handle update
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690 if (is_method_handle_intrinsic()) |
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691 return false; // special-cased in SharedRuntime::generate_native_wrapper |
0 | 692 address func = native_function(); |
693 return (func != NULL && func != SharedRuntime::native_method_throw_unsatisfied_link_error_entry()); | |
694 } | |
695 | |
696 | |
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697 void Method::clear_native_function() { |
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698 // Note: is_method_handle_intrinsic() is allowed here. |
0 | 699 set_native_function( |
700 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
701 !native_bind_event_is_interesting); | |
702 clear_code(); | |
703 } | |
704 | |
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705 address Method::critical_native_function() { |
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0382d2b469b2
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706 methodHandle mh(this); |
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707 return NativeLookup::lookup_critical_entry(mh); |
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708 } |
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709 |
0 | 710 |
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711 void Method::set_signature_handler(address handler) { |
0 | 712 address* signature_handler = signature_handler_addr(); |
713 *signature_handler = handler; | |
714 } | |
715 | |
716 | |
7998 | 717 void Method::print_made_not_compilable(int comp_level, bool is_osr, bool report, const char* reason) { |
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718 if (PrintCompilation && report) { |
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719 ttyLocker ttyl; |
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720 tty->print("made not %scompilable on ", is_osr ? "OSR " : ""); |
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721 if (comp_level == CompLevel_all) { |
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722 tty->print("all levels "); |
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723 } else { |
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724 tty->print("levels "); |
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725 for (int i = (int)CompLevel_none; i <= comp_level; i++) { |
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726 tty->print("%d ", i); |
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727 } |
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728 } |
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729 this->print_short_name(tty); |
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730 int size = this->code_size(); |
7998 | 731 if (size > 0) { |
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732 tty->print(" (%d bytes)", size); |
7998 | 733 } |
734 if (reason != NULL) { | |
735 tty->print(" %s", reason); | |
736 } | |
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737 tty->cr(); |
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738 } |
0 | 739 if ((TraceDeoptimization || LogCompilation) && (xtty != NULL)) { |
740 ttyLocker ttyl; | |
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741 xtty->begin_elem("make_not_compilable thread='" UINTX_FORMAT "' osr='%d' level='%d'", |
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742 os::current_thread_id(), is_osr, comp_level); |
7998 | 743 if (reason != NULL) { |
744 xtty->print(" reason=\'%s\'", reason); | |
745 } | |
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746 xtty->method(this); |
0 | 747 xtty->stamp(); |
748 xtty->end_elem(); | |
749 } | |
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750 } |
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751 |
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752 bool Method::is_always_compilable() const { |
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753 // Generated adapters must be compiled |
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754 if (is_method_handle_intrinsic() && is_synthetic()) { |
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755 assert(!is_not_c1_compilable(), "sanity check"); |
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756 assert(!is_not_c2_compilable(), "sanity check"); |
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757 return true; |
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758 } |
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759 |
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760 return false; |
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761 } |
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762 |
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763 bool Method::is_not_compilable(int comp_level) const { |
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764 if (number_of_breakpoints() > 0) |
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765 return true; |
12170
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766 if (is_always_compilable()) |
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767 return false; |
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768 if (comp_level == CompLevel_any) |
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769 return is_not_c1_compilable() || is_not_c2_compilable(); |
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770 if (is_c1_compile(comp_level)) |
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771 return is_not_c1_compilable(); |
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772 if (is_c2_compile(comp_level)) |
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773 return is_not_c2_compilable(); |
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774 return false; |
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775 } |
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776 |
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777 // call this when compiler finds that this method is not compilable |
7998 | 778 void Method::set_not_compilable(int comp_level, bool report, const char* reason) { |
12170
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779 if (is_always_compilable()) { |
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780 // Don't mark a method which should be always compilable |
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781 return; |
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782 } |
7998 | 783 print_made_not_compilable(comp_level, /*is_osr*/ false, report, reason); |
1783 | 784 if (comp_level == CompLevel_all) { |
785 set_not_c1_compilable(); | |
786 set_not_c2_compilable(); | |
787 } else { | |
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788 if (is_c1_compile(comp_level)) |
1783 | 789 set_not_c1_compilable(); |
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790 if (is_c2_compile(comp_level)) |
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791 set_not_c2_compilable(); |
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792 } |
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793 CompilationPolicy::policy()->disable_compilation(this); |
12073 | 794 assert(!CompilationPolicy::can_be_compiled(this, comp_level), "sanity check"); |
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795 } |
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796 |
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797 bool Method::is_not_osr_compilable(int comp_level) const { |
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798 if (is_not_compilable(comp_level)) |
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799 return true; |
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800 if (comp_level == CompLevel_any) |
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801 return is_not_c1_osr_compilable() || is_not_c2_osr_compilable(); |
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802 if (is_c1_compile(comp_level)) |
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803 return is_not_c1_osr_compilable(); |
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804 if (is_c2_compile(comp_level)) |
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805 return is_not_c2_osr_compilable(); |
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806 return false; |
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807 } |
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808 |
7998 | 809 void Method::set_not_osr_compilable(int comp_level, bool report, const char* reason) { |
810 print_made_not_compilable(comp_level, /*is_osr*/ true, report, reason); | |
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811 if (comp_level == CompLevel_all) { |
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812 set_not_c1_osr_compilable(); |
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813 set_not_c2_osr_compilable(); |
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814 } else { |
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815 if (is_c1_compile(comp_level)) |
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816 set_not_c1_osr_compilable(); |
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817 if (is_c2_compile(comp_level)) |
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818 set_not_c2_osr_compilable(); |
0 | 819 } |
1783 | 820 CompilationPolicy::policy()->disable_compilation(this); |
12073 | 821 assert(!CompilationPolicy::can_be_osr_compiled(this, comp_level), "sanity check"); |
0 | 822 } |
823 | |
824 // Revert to using the interpreter and clear out the nmethod | |
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825 void Method::clear_code() { |
0 | 826 |
827 // this may be NULL if c2i adapters have not been made yet | |
828 // Only should happen at allocate time. | |
829 if (_adapter == NULL) { | |
830 _from_compiled_entry = NULL; | |
831 } else { | |
832 _from_compiled_entry = _adapter->get_c2i_entry(); | |
833 } | |
834 OrderAccess::storestore(); | |
835 _from_interpreted_entry = _i2i_entry; | |
836 OrderAccess::storestore(); | |
837 _code = NULL; | |
838 } | |
839 | |
840 // Called by class data sharing to remove any entry points (which are not shared) | |
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841 void Method::unlink_method() { |
0 | 842 _code = NULL; |
843 _i2i_entry = NULL; | |
844 _from_interpreted_entry = NULL; | |
845 if (is_native()) { | |
846 *native_function_addr() = NULL; | |
847 set_signature_handler(NULL); | |
848 } | |
849 NOT_PRODUCT(set_compiled_invocation_count(0);) | |
850 _adapter = NULL; | |
851 _from_compiled_entry = NULL; | |
8751
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852 |
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853 // In case of DumpSharedSpaces, _method_data should always be NULL. |
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854 // |
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855 // During runtime (!DumpSharedSpaces), when we are cleaning a |
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856 // shared class that failed to load, this->link_method() may |
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857 // have already been called (before an exception happened), so |
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858 // this->_method_data may not be NULL. |
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859 assert(!DumpSharedSpaces || _method_data == NULL, "unexpected method data?"); |
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860 |
0 | 861 set_method_data(NULL); |
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862 clear_method_counters(); |
0 | 863 } |
864 | |
865 // Called when the method_holder is getting linked. Setup entrypoints so the method | |
866 // is ready to be called from interpreter, compiler, and vtables. | |
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867 void Method::link_method(methodHandle h_method, TRAPS) { |
3404 | 868 // If the code cache is full, we may reenter this function for the |
869 // leftover methods that weren't linked. | |
870 if (_i2i_entry != NULL) return; | |
871 | |
0 | 872 assert(_adapter == NULL, "init'd to NULL" ); |
873 assert( _code == NULL, "nothing compiled yet" ); | |
874 | |
875 // Setup interpreter entrypoint | |
876 assert(this == h_method(), "wrong h_method()" ); | |
877 address entry = Interpreter::entry_for_method(h_method); | |
878 assert(entry != NULL, "interpreter entry must be non-null"); | |
879 // Sets both _i2i_entry and _from_interpreted_entry | |
880 set_interpreter_entry(entry); | |
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881 |
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882 // Don't overwrite already registered native entries. |
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883 if (is_native() && !has_native_function()) { |
0 | 884 set_native_function( |
885 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
886 !native_bind_event_is_interesting); | |
887 } | |
888 | |
889 // Setup compiler entrypoint. This is made eagerly, so we do not need | |
890 // special handling of vtables. An alternative is to make adapters more | |
891 // lazily by calling make_adapter() from from_compiled_entry() for the | |
892 // normal calls. For vtable calls life gets more complicated. When a | |
893 // call-site goes mega-morphic we need adapters in all methods which can be | |
894 // called from the vtable. We need adapters on such methods that get loaded | |
895 // later. Ditto for mega-morphic itable calls. If this proves to be a | |
896 // problem we'll make these lazily later. | |
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897 (void) make_adapters(h_method, CHECK); |
0 | 898 |
899 // ONLY USE the h_method now as make_adapter may have blocked | |
900 | |
901 } | |
902 | |
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903 address Method::make_adapters(methodHandle mh, TRAPS) { |
0 | 904 // Adapters for compiled code are made eagerly here. They are fairly |
905 // small (generally < 100 bytes) and quick to make (and cached and shared) | |
906 // so making them eagerly shouldn't be too expensive. | |
907 AdapterHandlerEntry* adapter = AdapterHandlerLibrary::get_adapter(mh); | |
908 if (adapter == NULL ) { | |
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909 THROW_MSG_NULL(vmSymbols::java_lang_VirtualMachineError(), "out of space in CodeCache for adapters"); |
0 | 910 } |
911 | |
912 mh->set_adapter_entry(adapter); | |
913 mh->_from_compiled_entry = adapter->get_c2i_entry(); | |
914 return adapter->get_c2i_entry(); | |
915 } | |
916 | |
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917 void Method::restore_unshareable_info(TRAPS) { |
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918 // Since restore_unshareable_info can be called more than once for a method, don't |
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919 // redo any work. If this field is restored, there is nothing to do. |
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920 if (_from_compiled_entry == NULL) { |
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921 // restore method's vtable by calling a virtual function |
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922 restore_vtable(); |
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923 |
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924 methodHandle mh(THREAD, this); |
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925 link_method(mh, CHECK); |
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926 } |
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927 } |
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928 |
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929 |
0 | 930 // The verified_code_entry() must be called when a invoke is resolved |
931 // on this method. | |
932 | |
933 // It returns the compiled code entry point, after asserting not null. | |
934 // This function is called after potential safepoints so that nmethod | |
935 // or adapter that it points to is still live and valid. | |
936 // This function must not hit a safepoint! | |
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937 address Method::verified_code_entry() { |
0 | 938 debug_only(No_Safepoint_Verifier nsv;) |
939 assert(_from_compiled_entry != NULL, "must be set"); | |
940 return _from_compiled_entry; | |
941 } | |
942 | |
943 // Check that if an nmethod ref exists, it has a backlink to this or no backlink at all | |
944 // (could be racing a deopt). | |
945 // Not inline to avoid circular ref. | |
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946 bool Method::check_code() const { |
0 | 947 // cached in a register or local. There's a race on the value of the field. |
948 nmethod *code = (nmethod *)OrderAccess::load_ptr_acquire(&_code); | |
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949 return code == NULL || (code->method() == NULL) || (code->method() == (Method*)this && !code->is_osr_method()); |
0 | 950 } |
951 | |
952 // Install compiled code. Instantly it can execute. | |
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953 void Method::set_code(methodHandle mh, nmethod *code) { |
0 | 954 assert( code, "use clear_code to remove code" ); |
955 assert( mh->check_code(), "" ); | |
956 | |
957 guarantee(mh->adapter() != NULL, "Adapter blob must already exist!"); | |
958 | |
959 // These writes must happen in this order, because the interpreter will | |
960 // directly jump to from_interpreted_entry which jumps to an i2c adapter | |
961 // which jumps to _from_compiled_entry. | |
962 mh->_code = code; // Assign before allowing compiled code to exec | |
963 | |
964 int comp_level = code->comp_level(); | |
965 // In theory there could be a race here. In practice it is unlikely | |
966 // and not worth worrying about. | |
1783 | 967 if (comp_level > mh->highest_comp_level()) { |
968 mh->set_highest_comp_level(comp_level); | |
0 | 969 } |
970 | |
971 OrderAccess::storestore(); | |
1692 | 972 #ifdef SHARK |
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973 mh->_from_interpreted_entry = code->insts_begin(); |
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974 #else //!SHARK |
0 | 975 mh->_from_compiled_entry = code->verified_entry_point(); |
976 OrderAccess::storestore(); | |
977 // Instantly compiled code can execute. | |
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978 if (!mh->is_method_handle_intrinsic()) |
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979 mh->_from_interpreted_entry = mh->get_i2c_entry(); |
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980 #endif //!SHARK |
0 | 981 } |
982 | |
983 | |
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984 bool Method::is_overridden_in(Klass* k) const { |
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985 InstanceKlass* ik = InstanceKlass::cast(k); |
0 | 986 |
987 if (ik->is_interface()) return false; | |
988 | |
989 // If method is an interface, we skip it - except if it | |
990 // is a miranda method | |
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991 if (method_holder()->is_interface()) { |
0 | 992 // Check that method is not a miranda method |
993 if (ik->lookup_method(name(), signature()) == NULL) { | |
994 // No implementation exist - so miranda method | |
995 return false; | |
996 } | |
997 return true; | |
998 } | |
999 | |
1000 assert(ik->is_subclass_of(method_holder()), "should be subklass"); | |
1001 assert(ik->vtable() != NULL, "vtable should exist"); | |
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1002 if (!has_vtable_index()) { |
0 | 1003 return false; |
1004 } else { | |
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1005 Method* vt_m = ik->method_at_vtable(vtable_index()); |
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1006 return vt_m != this; |
0 | 1007 } |
1008 } | |
1009 | |
1010 | |
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1011 // give advice about whether this Method* should be cached or not |
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1012 bool Method::should_not_be_cached() const { |
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1013 if (is_old()) { |
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1014 // This method has been redefined. It is either EMCP or obsolete |
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1015 // and we don't want to cache it because that would pin the method |
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1016 // down and prevent it from being collectible if and when it |
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1017 // finishes executing. |
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1018 return true; |
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1019 } |
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1020 |
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1021 // caching this method should be just fine |
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1022 return false; |
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1023 } |
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1024 |
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1025 |
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1026 /** |
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1027 * Returns true if this is one of the specially treated methods for |
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1028 * security related stack walks (like Reflection.getCallerClass). |
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1029 */ |
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1030 bool Method::is_ignored_by_security_stack_walk() const { |
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1031 const bool use_new_reflection = JDK_Version::is_gte_jdk14x_version() && UseNewReflection; |
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1032 |
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1033 if (intrinsic_id() == vmIntrinsics::_invoke) { |
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1034 // This is Method.invoke() -- ignore it |
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1035 return true; |
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1036 } |
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1037 if (use_new_reflection && |
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1038 method_holder()->is_subclass_of(SystemDictionary::reflect_MethodAccessorImpl_klass())) { |
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1039 // This is an auxilary frame -- ignore it |
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1040 return true; |
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1041 } |
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1042 if (is_method_handle_intrinsic() || is_compiled_lambda_form()) { |
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1043 // This is an internal adapter frame for method handles -- ignore it |
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1044 return true; |
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1045 } |
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1046 return false; |
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1047 } |
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1048 |
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1049 |
710 | 1050 // Constant pool structure for invoke methods: |
1051 enum { | |
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1052 _imcp_invoke_name = 1, // utf8: 'invokeExact', etc. |
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1053 _imcp_invoke_signature, // utf8: (variable Symbol*) |
710 | 1054 _imcp_limit |
1055 }; | |
1056 | |
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1057 // Test if this method is an MH adapter frame generated by Java code. |
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1058 // Cf. java/lang/invoke/InvokerBytecodeGenerator |
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1059 bool Method::is_compiled_lambda_form() const { |
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1060 return intrinsic_id() == vmIntrinsics::_compiledLambdaForm; |
710 | 1061 } |
1062 | |
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1063 // Test if this method is an internal MH primitive method. |
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1064 bool Method::is_method_handle_intrinsic() const { |
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1065 vmIntrinsics::ID iid = intrinsic_id(); |
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1066 return (MethodHandles::is_signature_polymorphic(iid) && |
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1067 MethodHandles::is_signature_polymorphic_intrinsic(iid)); |
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1068 } |
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1069 |
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1070 bool Method::has_member_arg() const { |
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1071 vmIntrinsics::ID iid = intrinsic_id(); |
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1072 return (MethodHandles::is_signature_polymorphic(iid) && |
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1073 MethodHandles::has_member_arg(iid)); |
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1074 } |
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1075 |
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1076 // Make an instance of a signature-polymorphic internal MH primitive. |
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1077 methodHandle Method::make_method_handle_intrinsic(vmIntrinsics::ID iid, |
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1078 Symbol* signature, |
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1079 TRAPS) { |
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1080 ResourceMark rm; |
710 | 1081 methodHandle empty; |
1082 | |
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1083 KlassHandle holder = SystemDictionary::MethodHandle_klass(); |
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1084 Symbol* name = MethodHandles::signature_polymorphic_intrinsic_name(iid); |
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1085 assert(iid == MethodHandles::signature_polymorphic_name_id(name), ""); |
710 | 1086 if (TraceMethodHandles) { |
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1087 tty->print_cr("make_method_handle_intrinsic MH.%s%s", name->as_C_string(), signature->as_C_string()); |
710 | 1088 } |
1089 | |
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1090 // invariant: cp->symbol_at_put is preceded by a refcount increment (more usually a lookup) |
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1091 name->increment_refcount(); |
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1092 signature->increment_refcount(); |
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1093 |
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1094 int cp_length = _imcp_limit; |
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1095 ClassLoaderData* loader_data = holder->class_loader_data(); |
710 | 1096 constantPoolHandle cp; |
1097 { | |
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1098 ConstantPool* cp_oop = ConstantPool::allocate(loader_data, cp_length, CHECK_(empty)); |
710 | 1099 cp = constantPoolHandle(THREAD, cp_oop); |
1100 } | |
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1101 cp->set_pool_holder(InstanceKlass::cast(holder())); |
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1102 cp->symbol_at_put(_imcp_invoke_name, name); |
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1103 cp->symbol_at_put(_imcp_invoke_signature, signature); |
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1104 cp->set_has_preresolution(); |
710 | 1105 |
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1106 // decide on access bits: public or not? |
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1107 int flags_bits = (JVM_ACC_NATIVE | JVM_ACC_SYNTHETIC | JVM_ACC_FINAL); |
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1108 bool must_be_static = MethodHandles::is_signature_polymorphic_static(iid); |
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1109 if (must_be_static) flags_bits |= JVM_ACC_STATIC; |
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1110 assert((flags_bits & JVM_ACC_PUBLIC) == 0, "do not expose these methods"); |
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1111 |
710 | 1112 methodHandle m; |
1113 { | |
8031 | 1114 InlineTableSizes sizes; |
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1115 Method* m_oop = Method::allocate(loader_data, 0, |
8031 | 1116 accessFlags_from(flags_bits), &sizes, |
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1117 ConstMethod::NORMAL, CHECK_(empty)); |
710 | 1118 m = methodHandle(THREAD, m_oop); |
1119 } | |
1120 m->set_constants(cp()); | |
1121 m->set_name_index(_imcp_invoke_name); | |
1122 m->set_signature_index(_imcp_invoke_signature); | |
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1123 assert(MethodHandles::is_signature_polymorphic_name(m->name()), ""); |
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1124 assert(m->signature() == signature, ""); |
710 | 1125 #ifdef CC_INTERP |
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1126 ResultTypeFinder rtf(signature); |
710 | 1127 m->set_result_index(rtf.type()); |
1128 #endif | |
1129 m->compute_size_of_parameters(THREAD); | |
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1130 m->init_intrinsic_id(); |
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1131 assert(m->is_method_handle_intrinsic(), ""); |
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1132 #ifdef ASSERT |
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1133 if (!MethodHandles::is_signature_polymorphic(m->intrinsic_id())) m->print(); |
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1134 assert(MethodHandles::is_signature_polymorphic(m->intrinsic_id()), "must be an invoker"); |
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1135 assert(m->intrinsic_id() == iid, "correctly predicted iid"); |
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1136 #endif //ASSERT |
710 | 1137 |
1138 // Finally, set up its entry points. | |
1139 assert(m->can_be_statically_bound(), ""); | |
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1140 m->set_vtable_index(Method::nonvirtual_vtable_index); |
710 | 1141 m->link_method(m, CHECK_(empty)); |
1142 | |
1039
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1143 if (TraceMethodHandles && (Verbose || WizardMode)) |
710 | 1144 m->print_on(tty); |
1145 | |
1146 return m; | |
1147 } | |
1148 | |
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1149 Klass* Method::check_non_bcp_klass(Klass* klass) { |
6983 | 1150 if (klass != NULL && klass->class_loader() != NULL) { |
1151 if (klass->oop_is_objArray()) | |
6831
d8ce2825b193
8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
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|
1152 klass = ObjArrayKlass::cast(klass)->bottom_klass(); |
3461
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7056328: JSR 292 invocation sometimes fails in adapters for types not on boot class path
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|
1153 return klass; |
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|
1154 } |
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|
1155 return NULL; |
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|
1156 } |
710 | 1157 |
48
d8b3ef7ee3e5
6599425: 4/3 OopMapCache::lookup() can cause later crash or assert() failure
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diff
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|
1158 |
6725
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1159 methodHandle Method::clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length, |
0 | 1160 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS) { |
1161 // Code below does not work for native methods - they should never get rewritten anyway | |
1162 assert(!m->is_native(), "cannot rewrite native methods"); | |
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1163 // Allocate new Method* |
0 | 1164 AccessFlags flags = m->access_flags(); |
8031 | 1165 |
1166 ConstMethod* cm = m->constMethod(); | |
1167 int checked_exceptions_len = cm->checked_exceptions_length(); | |
1168 int localvariable_len = cm->localvariable_table_length(); | |
1169 int exception_table_len = cm->exception_table_length(); | |
1170 int method_parameters_len = cm->method_parameters_length(); | |
1171 int method_annotations_len = cm->method_annotations_length(); | |
1172 int parameter_annotations_len = cm->parameter_annotations_length(); | |
1173 int type_annotations_len = cm->type_annotations_length(); | |
1174 int default_annotations_len = cm->default_annotations_length(); | |
1175 | |
1176 InlineTableSizes sizes( | |
1177 localvariable_len, | |
1178 new_compressed_linenumber_size, | |
1179 exception_table_len, | |
1180 checked_exceptions_len, | |
1181 method_parameters_len, | |
1182 cm->generic_signature_index(), | |
1183 method_annotations_len, | |
1184 parameter_annotations_len, | |
1185 type_annotations_len, | |
1186 default_annotations_len, | |
1187 0); | |
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1188 |
6934 | 1189 ClassLoaderData* loader_data = m->method_holder()->class_loader_data(); |
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1190 Method* newm_oop = Method::allocate(loader_data, |
6934 | 1191 new_code_length, |
1192 flags, | |
8031 | 1193 &sizes, |
6934 | 1194 m->method_type(), |
1195 CHECK_(methodHandle())); | |
0 | 1196 methodHandle newm (THREAD, newm_oop); |
1197 int new_method_size = newm->method_size(); | |
518
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1198 |
6725
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1199 // Create a shallow copy of Method part, but be careful to preserve the new ConstMethod* |
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1200 ConstMethod* newcm = newm->constMethod(); |
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1201 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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|
1202 |
6725
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1203 memcpy(newm(), m(), sizeof(Method)); |
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1204 |
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1205 // Create shallow copy of ConstMethod. |
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|
1206 memcpy(newcm, m->constMethod(), sizeof(ConstMethod)); |
2226
c5a923563727
6912621: iCMS: Error: assert(_markBitMap.isMarked(addr + 1),"Missing Printezis bit?")
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|
1207 |
0 | 1208 // Reset correct method/const method, method size, and parameter info |
1209 newm->set_constMethod(newcm); | |
1210 newm->constMethod()->set_code_size(new_code_length); | |
1211 newm->constMethod()->set_constMethod_size(new_const_method_size); | |
1212 newm->set_method_size(new_method_size); | |
1213 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
|
1214 assert(newm->method_parameters_length() == method_parameters_len, "check"); |
0 | 1215 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
changeset
|
1216 assert(newm->exception_table_length() == exception_table_len, "check"); |
0 | 1217 assert(newm->localvariable_table_length() == localvariable_len, "check"); |
1218 // Copy new byte codes | |
1219 memcpy(newm->code_base(), new_code, new_code_length); | |
1220 // Copy line number table | |
1221 if (new_compressed_linenumber_size > 0) { | |
1222 memcpy(newm->compressed_linenumber_table(), | |
1223 new_compressed_linenumber_table, | |
1224 new_compressed_linenumber_size); | |
1225 } | |
11159
16511b7e3d35
8019632: Method parameters are not copied in clone_with_new_data
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|
1226 // Copy method_parameters |
16511b7e3d35
8019632: Method parameters are not copied in clone_with_new_data
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11034
diff
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|
1227 if (method_parameters_len > 0) { |
16511b7e3d35
8019632: Method parameters are not copied in clone_with_new_data
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changeset
|
1228 memcpy(newm->method_parameters_start(), |
16511b7e3d35
8019632: Method parameters are not copied in clone_with_new_data
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diff
changeset
|
1229 m->method_parameters_start(), |
16511b7e3d35
8019632: Method parameters are not copied in clone_with_new_data
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11034
diff
changeset
|
1230 method_parameters_len * sizeof(MethodParametersElement)); |
16511b7e3d35
8019632: Method parameters are not copied in clone_with_new_data
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|
1231 } |
0 | 1232 // Copy checked_exceptions |
1233 if (checked_exceptions_len > 0) { | |
1234 memcpy(newm->checked_exceptions_start(), | |
1235 m->checked_exceptions_start(), | |
1236 checked_exceptions_len * sizeof(CheckedExceptionElement)); | |
1237 } | |
6216
161ae369407d
7181632: nsk classLoad001_14 failure and CompileTheWorld crash after 7178145.
jiangli
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6213
diff
changeset
|
1238 // Copy exception table |
161ae369407d
7181632: nsk classLoad001_14 failure and CompileTheWorld crash after 7178145.
jiangli
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6213
diff
changeset
|
1239 if (exception_table_len > 0) { |
161ae369407d
7181632: nsk classLoad001_14 failure and CompileTheWorld crash after 7178145.
jiangli
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diff
changeset
|
1240 memcpy(newm->exception_table_start(), |
161ae369407d
7181632: nsk classLoad001_14 failure and CompileTheWorld crash after 7178145.
jiangli
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changeset
|
1241 m->exception_table_start(), |
161ae369407d
7181632: nsk classLoad001_14 failure and CompileTheWorld crash after 7178145.
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changeset
|
1242 exception_table_len * sizeof(ExceptionTableElement)); |
161ae369407d
7181632: nsk classLoad001_14 failure and CompileTheWorld crash after 7178145.
jiangli
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6213
diff
changeset
|
1243 } |
0 | 1244 // Copy local variable number table |
1245 if (localvariable_len > 0) { | |
1246 memcpy(newm->localvariable_table_start(), | |
1247 m->localvariable_table_start(), | |
1248 localvariable_len * sizeof(LocalVariableTableElement)); | |
1249 } | |
6725
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|
1250 // Copy stackmap table |
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|
1251 if (m->has_stackmap_table()) { |
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|
1252 int code_attribute_length = m->stackmap_data()->length(); |
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|
1253 Array<u1>* stackmap_data = |
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6964458: Reimplement class meta-data storage to use native memory
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changeset
|
1254 MetadataFactory::new_array<u1>(loader_data, code_attribute_length, 0, CHECK_NULL); |
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|
1255 memcpy((void*)stackmap_data->adr_at(0), |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
1256 (void*)m->stackmap_data()->adr_at(0), code_attribute_length); |
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|
1257 newm->set_stackmap_data(stackmap_data); |
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1258 } |
518
0af8b0718fc9
6692899: CMS: many vm.parallel_class_loading tests fail with assert "missing Printezis mark"
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196
diff
changeset
|
1259 |
8837
0c3ee6f1fa23
8009531: Crash when redefining class with annotated method
coleenp
parents:
8751
diff
changeset
|
1260 // copy annotations over to new method |
0c3ee6f1fa23
8009531: Crash when redefining class with annotated method
coleenp
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8751
diff
changeset
|
1261 newcm->copy_annotations_from(cm); |
0 | 1262 return newm; |
1263 } | |
1264 | |
6725
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|
1265 vmSymbols::SID Method::klass_id_for_intrinsics(Klass* holder) { |
0 | 1266 // if loader is not the default loader (i.e., != NULL), we can't know the intrinsics |
1267 // because we are not loading from core libraries | |
6894 | 1268 // exception: the AES intrinsics come from lib/ext/sunjce_provider.jar |
1269 // 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
|
1270 InstanceKlass* ik = InstanceKlass::cast(holder); |
16885e702c88
7198429: need checked categorization of caller-sensitive methods in the JDK
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|
1271 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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|
1272 return vmSymbols::NO_SID; // regardless of name, no intrinsics here |
6894 | 1273 } |
0 | 1274 |
1275 // 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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8751
diff
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|
1276 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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|
1277 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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|
1278 } |
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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diff
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|
1279 |
6725
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|
1280 void Method::init_intrinsic_id() { |
856
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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diff
changeset
|
1281 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
|
1282 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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|
1283 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
|
1284 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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|
1285 |
75596850f863
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diff
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|
1286 // the klass name is well-known: |
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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diff
changeset
|
1287 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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changeset
|
1288 assert(klass_id != vmSymbols::NO_SID, "caller responsibility"); |
0 | 1289 |
1290 // ditto for method and signature: | |
1291 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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|
1292 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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|
1293 && 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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diff
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|
1294 return; |
0 | 1295 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
|
1296 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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|
1297 && sig_id == vmSymbols::NO_SID) return; |
0 | 1298 jshort flags = access_flags().as_short(); |
1299 | |
856
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6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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changeset
|
1300 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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|
1301 if (id != vmIntrinsics::_none) { |
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6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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diff
changeset
|
1302 set_intrinsic_id(id); |
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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diff
changeset
|
1303 return; |
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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diff
changeset
|
1304 } |
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|
1305 |
0 | 1306 // A few slightly irregular cases: |
1307 switch (klass_id) { | |
1308 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_StrictMath): | |
1309 // Second chance: check in regular Math. | |
1310 switch (name_id) { | |
1311 case vmSymbols::VM_SYMBOL_ENUM_NAME(min_name): | |
1312 case vmSymbols::VM_SYMBOL_ENUM_NAME(max_name): | |
1313 case vmSymbols::VM_SYMBOL_ENUM_NAME(sqrt_name): | |
1314 // pretend it is the corresponding method in the non-strict class: | |
1315 klass_id = vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_Math); | |
856
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diff
changeset
|
1316 id = vmIntrinsics::find_id(klass_id, name_id, sig_id, flags); |
0 | 1317 break; |
1318 } | |
1507
cd5dbf694d45
6939134: JSR 292 adjustments to method handle invocation
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1506
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changeset
|
1319 break; |
cd5dbf694d45
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1506
diff
changeset
|
1320 |
cd5dbf694d45
6939134: JSR 292 adjustments to method handle invocation
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diff
changeset
|
1321 // 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
|
1322 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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|
1323 if (!is_native()) break; |
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7023639: JSR 292 method handle invocation needs a fast path for compiled code
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|
1324 id = MethodHandles::signature_polymorphic_name_id(method_holder(), name()); |
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7023639: JSR 292 method handle invocation needs a fast path for compiled code
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|
1325 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
diff
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|
1326 id = vmIntrinsics::_none; |
1507
cd5dbf694d45
6939134: JSR 292 adjustments to method handle invocation
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1506
diff
changeset
|
1327 break; |
0 | 1328 } |
1329 | |
856
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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changeset
|
1330 if (id != vmIntrinsics::_none) { |
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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diff
changeset
|
1331 // 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
|
1332 set_intrinsic_id(id); |
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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diff
changeset
|
1333 return; |
75596850f863
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|
1334 } |
0 | 1335 } |
1336 | |
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1337 // These two methods are static since a GC may move the Method |
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1338 bool Method::load_signature_classes(methodHandle m, TRAPS) { |
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1339 if (!THREAD->can_call_java()) { |
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1340 // There is nothing useful this routine can do from within the Compile thread. |
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1341 // Hopefully, the signature contains only well-known classes. |
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1342 // We could scan for this and return true/false, but the caller won't care. |
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1343 return false; |
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1344 } |
0 | 1345 bool sig_is_loaded = true; |
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1346 Handle class_loader(THREAD, m->method_holder()->class_loader()); |
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1347 Handle protection_domain(THREAD, m->method_holder()->protection_domain()); |
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1348 ResourceMark rm(THREAD); |
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1349 Symbol* signature = m->signature(); |
0 | 1350 for(SignatureStream ss(signature); !ss.is_done(); ss.next()) { |
1351 if (ss.is_object()) { | |
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1352 Symbol* sym = ss.as_symbol(CHECK_(false)); |
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1353 Symbol* name = sym; |
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1354 Klass* klass = SystemDictionary::resolve_or_null(name, class_loader, |
0 | 1355 protection_domain, THREAD); |
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1356 // We are loading classes eagerly. If a ClassNotFoundException or |
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1357 // a LinkageError was generated, be sure to ignore it. |
0 | 1358 if (HAS_PENDING_EXCEPTION) { |
1142 | 1359 if (PENDING_EXCEPTION->is_a(SystemDictionary::ClassNotFoundException_klass()) || |
1360 PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) { | |
0 | 1361 CLEAR_PENDING_EXCEPTION; |
1362 } else { | |
1363 return false; | |
1364 } | |
1365 } | |
1366 if( klass == NULL) { sig_is_loaded = false; } | |
1367 } | |
1368 } | |
1369 return sig_is_loaded; | |
1370 } | |
1371 | |
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1372 bool Method::has_unloaded_classes_in_signature(methodHandle m, TRAPS) { |
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1373 Handle class_loader(THREAD, m->method_holder()->class_loader()); |
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1374 Handle protection_domain(THREAD, m->method_holder()->protection_domain()); |
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1375 ResourceMark rm(THREAD); |
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1376 Symbol* signature = m->signature(); |
0 | 1377 for(SignatureStream ss(signature); !ss.is_done(); ss.next()) { |
1378 if (ss.type() == T_OBJECT) { | |
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1379 Symbol* name = ss.as_symbol_or_null(); |
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1380 if (name == NULL) return true; |
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1381 Klass* klass = SystemDictionary::find(name, class_loader, protection_domain, THREAD); |
0 | 1382 if (klass == NULL) return true; |
1383 } | |
1384 } | |
1385 return false; | |
1386 } | |
1387 | |
1388 // Exposed so field engineers can debug VM | |
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1389 void Method::print_short_name(outputStream* st) { |
0 | 1390 ResourceMark rm; |
1391 #ifdef PRODUCT | |
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1392 st->print(" %s::", method_holder()->external_name()); |
0 | 1393 #else |
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1394 st->print(" %s::", method_holder()->internal_name()); |
0 | 1395 #endif |
1396 name()->print_symbol_on(st); | |
1397 if (WizardMode) signature()->print_symbol_on(st); | |
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1398 else if (MethodHandles::is_signature_polymorphic(intrinsic_id())) |
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1399 MethodHandles::print_as_basic_type_signature_on(st, signature(), true); |
0 | 1400 } |
1401 | |
3779 | 1402 // Comparer for sorting an object array containing |
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1403 // Method*s. |
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1404 static int method_comparator(Method* a, Method* b) { |
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1405 return a->name()->fast_compare(b->name()); |
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1406 } |
0 | 1407 |
1408 // This is only done during class loading, so it is OK to assume method_idnum matches the methods() array | |
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1409 // default_methods also uses this without the ordering for fast find_method |
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1410 void Method::sort_methods(Array<Method*>* methods, bool idempotent, bool set_idnums) { |
0 | 1411 int length = methods->length(); |
1412 if (length > 1) { | |
3779 | 1413 { |
1414 No_Safepoint_Verifier nsv; | |
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1415 QuickSort::sort<Method*>(methods->data(), length, method_comparator, idempotent); |
0 | 1416 } |
1417 // Reset method ordering | |
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1418 if (set_idnums) { |
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1419 for (int i = 0; i < length; i++) { |
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1420 Method* m = methods->at(i); |
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1421 m->set_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
diff
changeset
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2044 } |