Mercurial > hg > truffle
annotate src/share/vm/oops/method.cpp @ 6989:2afd99933ae6
Remove Klass::cast from graalEnv
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Mon, 19 Nov 2012 15:42:58 +0100 |
parents | 2cb439954abf |
children | 679e6584c177 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/systemDictionary.hpp" | |
27 #include "code/debugInfoRec.hpp" | |
28 #include "gc_interface/collectedHeap.inline.hpp" | |
29 #include "interpreter/bytecodeStream.hpp" | |
30 #include "interpreter/bytecodeTracer.hpp" | |
31 #include "interpreter/bytecodes.hpp" | |
32 #include "interpreter/interpreter.hpp" | |
33 #include "interpreter/oopMapCache.hpp" | |
34 #include "memory/gcLocker.hpp" | |
35 #include "memory/generation.hpp" | |
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36 #include "memory/metadataFactory.hpp" |
1972 | 37 #include "memory/oopFactory.hpp" |
6934 | 38 #include "oops/constMethod.hpp" |
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39 #include "oops/methodData.hpp" |
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40 #include "oops/method.hpp" |
1972 | 41 #include "oops/oop.inline.hpp" |
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42 #include "oops/symbol.hpp" |
1972 | 43 #include "prims/jvmtiExport.hpp" |
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44 #include "prims/jvmtiRedefineClasses.hpp" |
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45 #include "prims/methodHandles.hpp" |
1972 | 46 #include "prims/nativeLookup.hpp" |
47 #include "runtime/arguments.hpp" | |
48 #include "runtime/compilationPolicy.hpp" | |
49 #include "runtime/frame.inline.hpp" | |
50 #include "runtime/handles.inline.hpp" | |
51 #include "runtime/relocator.hpp" | |
52 #include "runtime/sharedRuntime.hpp" | |
53 #include "runtime/signature.hpp" | |
3779 | 54 #include "utilities/quickSort.hpp" |
1972 | 55 #include "utilities/xmlstream.hpp" |
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56 #ifdef GRAAL |
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57 #include "graal/graalJavaAccess.hpp" |
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58 #endif |
0 | 59 |
60 | |
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61 // Implementation of Method |
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62 |
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63 Method* Method::allocate(ClassLoaderData* loader_data, |
6934 | 64 int byte_code_size, |
65 AccessFlags access_flags, | |
66 int compressed_line_number_size, | |
67 int localvariable_table_length, | |
68 int exception_table_length, | |
69 int checked_exceptions_length, | |
70 ConstMethod::MethodType method_type, | |
71 TRAPS) { | |
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72 assert(!access_flags.is_native() || byte_code_size == 0, |
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73 "native methods should not contain byte codes"); |
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74 ConstMethod* cm = ConstMethod::allocate(loader_data, |
6934 | 75 byte_code_size, |
76 compressed_line_number_size, | |
77 localvariable_table_length, | |
78 exception_table_length, | |
79 checked_exceptions_length, | |
80 method_type, | |
81 CHECK_NULL); | |
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82 |
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83 int size = Method::size(access_flags.is_native()); |
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84 |
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85 return new (loader_data, size, false, THREAD) Method(cm, access_flags, size); |
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86 } |
0 | 87 |
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88 Method::Method(ConstMethod* xconst, |
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89 AccessFlags access_flags, int size) { |
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90 No_Safepoint_Verifier no_safepoint; |
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91 set_constMethod(xconst); |
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92 set_access_flags(access_flags); |
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93 set_method_size(size); |
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94 set_name_index(0); |
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95 set_signature_index(0); |
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96 #ifdef CC_INTERP |
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97 set_result_index(T_VOID); |
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98 #endif |
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99 set_constants(NULL); |
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100 set_max_stack(0); |
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101 set_max_locals(0); |
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102 set_intrinsic_id(vmIntrinsics::_none); |
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103 set_jfr_towrite(false); |
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104 set_method_data(NULL); |
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105 set_interpreter_throwout_count(0); |
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106 set_vtable_index(Method::garbage_vtable_index); |
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107 |
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108 // Fix and bury in Method* |
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109 set_interpreter_entry(NULL); // sets i2i entry and from_int |
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110 set_adapter_entry(NULL); |
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111 clear_code(); // from_c/from_i get set to c2i/i2i |
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112 |
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113 if (access_flags.is_native()) { |
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114 clear_native_function(); |
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115 set_signature_handler(NULL); |
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116 } |
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117 |
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118 NOT_PRODUCT(set_compiled_invocation_count(0);) |
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119 set_interpreter_invocation_count(0); |
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120 invocation_counter()->init(); |
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121 backedge_counter()->init(); |
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122 clear_number_of_breakpoints(); |
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123 |
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124 #ifdef TIERED |
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125 set_rate(0); |
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126 set_prev_event_count(0); |
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127 set_prev_time(0); |
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128 #endif |
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129 } |
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130 |
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131 // Release Method*. The nmethod will be gone when we get here because |
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132 // we've walked the code cache. |
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133 void Method::deallocate_contents(ClassLoaderData* loader_data) { |
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134 MetadataFactory::free_metadata(loader_data, constMethod()); |
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135 set_constMethod(NULL); |
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136 MetadataFactory::free_metadata(loader_data, method_data()); |
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137 set_method_data(NULL); |
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138 // The nmethod will be gone when we get here. |
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139 if (code() != NULL) _code = NULL; |
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140 } |
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141 |
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142 address Method::get_i2c_entry() { |
0 | 143 assert(_adapter != NULL, "must have"); |
144 return _adapter->get_i2c_entry(); | |
145 } | |
146 | |
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147 address Method::get_c2i_entry() { |
0 | 148 assert(_adapter != NULL, "must have"); |
149 return _adapter->get_c2i_entry(); | |
150 } | |
151 | |
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152 address Method::get_c2i_unverified_entry() { |
0 | 153 assert(_adapter != NULL, "must have"); |
154 return _adapter->get_c2i_unverified_entry(); | |
155 } | |
156 | |
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157 char* Method::name_and_sig_as_C_string() const { |
6983 | 158 return name_and_sig_as_C_string(constants()->pool_holder(), name(), signature()); |
0 | 159 } |
160 | |
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161 char* Method::name_and_sig_as_C_string(char* buf, int size) const { |
6983 | 162 return name_and_sig_as_C_string(constants()->pool_holder(), name(), signature(), buf, size); |
0 | 163 } |
164 | |
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165 char* Method::name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature) { |
0 | 166 const char* klass_name = klass->external_name(); |
167 int klass_name_len = (int)strlen(klass_name); | |
168 int method_name_len = method_name->utf8_length(); | |
169 int len = klass_name_len + 1 + method_name_len + signature->utf8_length(); | |
170 char* dest = NEW_RESOURCE_ARRAY(char, len + 1); | |
171 strcpy(dest, klass_name); | |
172 dest[klass_name_len] = '.'; | |
173 strcpy(&dest[klass_name_len + 1], method_name->as_C_string()); | |
174 strcpy(&dest[klass_name_len + 1 + method_name_len], signature->as_C_string()); | |
175 dest[len] = 0; | |
176 return dest; | |
177 } | |
178 | |
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179 char* Method::name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size) { |
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180 Symbol* klass_name = klass->name(); |
0 | 181 klass_name->as_klass_external_name(buf, size); |
182 int len = (int)strlen(buf); | |
183 | |
184 if (len < size - 1) { | |
185 buf[len++] = '.'; | |
186 | |
187 method_name->as_C_string(&(buf[len]), size - len); | |
188 len = (int)strlen(buf); | |
189 | |
190 signature->as_C_string(&(buf[len]), size - len); | |
191 } | |
192 | |
193 return buf; | |
194 } | |
195 | |
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196 int Method::fast_exception_handler_bci_for(KlassHandle ex_klass, int throw_bci, TRAPS) { |
0 | 197 // exception table holds quadruple entries of the form (beg_bci, end_bci, handler_bci, klass_index) |
198 // access exception table | |
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199 ExceptionTable table(this); |
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200 int length = table.length(); |
0 | 201 // iterate through all entries sequentially |
202 constantPoolHandle pool(THREAD, constants()); | |
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203 for (int i = 0; i < length; i ++) { |
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204 //reacquire the table in case a GC happened |
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205 ExceptionTable table(this); |
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206 int beg_bci = table.start_pc(i); |
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207 int end_bci = table.end_pc(i); |
0 | 208 assert(beg_bci <= end_bci, "inconsistent exception table"); |
209 if (beg_bci <= throw_bci && throw_bci < end_bci) { | |
210 // exception handler bci range covers throw_bci => investigate further | |
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211 int handler_bci = table.handler_pc(i); |
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212 int klass_index = table.catch_type_index(i); |
0 | 213 if (klass_index == 0) { |
214 return handler_bci; | |
215 } else if (ex_klass.is_null()) { | |
216 return handler_bci; | |
217 } else { | |
218 // we know the exception class => get the constraint class | |
219 // this may require loading of the constraint class; if verification | |
220 // fails or some other exception occurs, return handler_bci | |
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221 Klass* k = pool->klass_at(klass_index, CHECK_(handler_bci)); |
0 | 222 KlassHandle klass = KlassHandle(THREAD, k); |
223 assert(klass.not_null(), "klass not loaded"); | |
224 if (ex_klass->is_subtype_of(klass())) { | |
225 return handler_bci; | |
226 } | |
227 } | |
228 } | |
229 } | |
230 | |
231 return -1; | |
232 } | |
233 | |
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234 void Method::mask_for(int bci, InterpreterOopMap* mask) { |
0 | 235 |
236 Thread* myThread = Thread::current(); | |
237 methodHandle h_this(myThread, this); | |
238 #ifdef ASSERT | |
239 bool has_capability = myThread->is_VM_thread() || | |
240 myThread->is_ConcurrentGC_thread() || | |
241 myThread->is_GC_task_thread(); | |
242 | |
243 if (!has_capability) { | |
244 if (!VerifyStack && !VerifyLastFrame) { | |
245 // verify stack calls this outside VM thread | |
246 warning("oopmap should only be accessed by the " | |
247 "VM, GC task or CMS threads (or during debugging)"); | |
248 InterpreterOopMap local_mask; | |
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249 method_holder()->mask_for(h_this, bci, &local_mask); |
0 | 250 local_mask.print(); |
251 } | |
252 } | |
253 #endif | |
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254 method_holder()->mask_for(h_this, bci, mask); |
0 | 255 return; |
256 } | |
257 | |
258 | |
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259 int Method::bci_from(address bcp) const { |
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260 #ifdef ASSERT |
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261 { ResourceMark rm; |
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262 assert(is_native() && bcp == code_base() || contains(bcp) || is_error_reported(), |
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263 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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264 } |
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265 #endif |
0 | 266 return bcp - code_base(); |
267 } | |
268 | |
269 | |
270 // Return (int)bcx if it appears to be a valid BCI. | |
271 // Return bci_from((address)bcx) if it appears to be a valid BCP. | |
272 // Return -1 otherwise. | |
273 // Used by profiling code, when invalid data is a possibility. | |
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274 // The caller is responsible for validating the Method* itself. |
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275 int Method::validate_bci_from_bcx(intptr_t bcx) const { |
0 | 276 // keep bci as -1 if not a valid bci |
277 int bci = -1; | |
278 if (bcx == 0 || (address)bcx == code_base()) { | |
279 // code_size() may return 0 and we allow 0 here | |
280 // the method may be native | |
281 bci = 0; | |
282 } else if (frame::is_bci(bcx)) { | |
283 if (bcx < code_size()) { | |
284 bci = (int)bcx; | |
285 } | |
286 } else if (contains((address)bcx)) { | |
287 bci = (address)bcx - code_base(); | |
288 } | |
289 // Assert that if we have dodged any asserts, bci is negative. | |
290 assert(bci == -1 || bci == bci_from(bcp_from(bci)), "sane bci if >=0"); | |
291 return bci; | |
292 } | |
293 | |
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294 address Method::bcp_from(int bci) const { |
0 | 295 assert((is_native() && bci == 0) || (!is_native() && 0 <= bci && bci < code_size()), "illegal bci"); |
296 address bcp = code_base() + bci; | |
297 assert(is_native() && bcp == code_base() || contains(bcp), "bcp doesn't belong to this method"); | |
298 return bcp; | |
299 } | |
300 | |
301 | |
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302 int Method::size(bool is_native) { |
0 | 303 // If native, then include pointers for native_function and signature_handler |
304 int extra_bytes = (is_native) ? 2*sizeof(address*) : 0; | |
305 int extra_words = align_size_up(extra_bytes, BytesPerWord) / BytesPerWord; | |
306 return align_object_size(header_size() + extra_words); | |
307 } | |
308 | |
309 | |
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310 Symbol* Method::klass_name() const { |
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311 Klass* k = method_holder(); |
0 | 312 assert(k->is_klass(), "must be klass"); |
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313 InstanceKlass* ik = (InstanceKlass*) k; |
0 | 314 return ik->name(); |
315 } | |
316 | |
317 | |
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318 void Method::set_interpreter_kind() { |
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319 int kind = Interpreter::method_kind(this); |
0 | 320 assert(kind != Interpreter::invalid, |
321 "interpreter entry must be valid"); | |
322 set_interpreter_kind(kind); | |
323 } | |
324 | |
325 | |
326 // Attempt to return method oop to original state. Clear any pointers | |
327 // (to objects outside the shared spaces). We won't be able to predict | |
328 // where they should point in a new JVM. Further initialize some | |
329 // entries now in order allow them to be write protected later. | |
330 | |
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331 void Method::remove_unshareable_info() { |
0 | 332 unlink_method(); |
333 set_interpreter_kind(); | |
334 } | |
335 | |
336 | |
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337 bool Method::was_executed_more_than(int n) { |
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338 // Invocation counter is reset when the Method* is compiled. |
0 | 339 // If the method has compiled code we therefore assume it has |
340 // be excuted more than n times. | |
341 if (is_accessor() || is_empty_method() || (code() != NULL)) { | |
342 // interpreter doesn't bump invocation counter of trivial methods | |
343 // compiler does not bump invocation counter of compiled methods | |
344 return true; | |
1783 | 345 } |
346 else if (_invocation_counter.carry() || (method_data() != NULL && method_data()->invocation_counter()->carry())) { | |
0 | 347 // The carry bit is set when the counter overflows and causes |
348 // a compilation to occur. We don't know how many times | |
349 // the counter has been reset, so we simply assume it has | |
350 // been executed more than n times. | |
351 return true; | |
352 } else { | |
353 return invocation_count() > n; | |
354 } | |
355 } | |
356 | |
357 #ifndef PRODUCT | |
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358 void Method::print_invocation_count() { |
0 | 359 if (is_static()) tty->print("static "); |
360 if (is_final()) tty->print("final "); | |
361 if (is_synchronized()) tty->print("synchronized "); | |
362 if (is_native()) tty->print("native "); | |
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363 method_holder()->name()->print_symbol_on(tty); |
0 | 364 tty->print("."); |
365 name()->print_symbol_on(tty); | |
366 signature()->print_symbol_on(tty); | |
367 | |
368 if (WizardMode) { | |
369 // dump the size of the byte codes | |
370 tty->print(" {%d}", code_size()); | |
371 } | |
372 tty->cr(); | |
373 | |
374 tty->print_cr (" interpreter_invocation_count: %8d ", interpreter_invocation_count()); | |
375 tty->print_cr (" invocation_counter: %8d ", invocation_count()); | |
376 tty->print_cr (" backedge_counter: %8d ", backedge_count()); | |
377 if (CountCompiledCalls) { | |
378 tty->print_cr (" compiled_invocation_count: %8d ", compiled_invocation_count()); | |
379 } | |
380 | |
381 } | |
382 #endif | |
383 | |
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384 // Build a MethodData* object to hold information about this method |
0 | 385 // collected in the interpreter. |
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386 void Method::build_interpreter_method_data(methodHandle method, TRAPS) { |
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387 // Do not profile method if current thread holds the pending list lock, |
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388 // which avoids deadlock for acquiring the MethodData_lock. |
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389 if (InstanceRefKlass::owns_pending_list_lock((JavaThread*)THREAD)) { |
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390 return; |
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391 } |
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392 |
0 | 393 // Grab a lock here to prevent multiple |
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394 // MethodData*s from being created. |
0 | 395 MutexLocker ml(MethodData_lock, THREAD); |
396 if (method->method_data() == NULL) { | |
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397 ClassLoaderData* loader_data = method->method_holder()->class_loader_data(); |
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398 MethodData* method_data = MethodData::allocate(loader_data, method, CHECK); |
0 | 399 method->set_method_data(method_data); |
400 if (PrintMethodData && (Verbose || WizardMode)) { | |
401 ResourceMark rm(THREAD); | |
402 tty->print("build_interpreter_method_data for "); | |
403 method->print_name(tty); | |
404 tty->cr(); | |
405 // At the end of the run, the MDO, full of data, will be dumped. | |
406 } | |
407 } | |
408 } | |
409 | |
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410 void Method::cleanup_inline_caches() { |
0 | 411 // The current system doesn't use inline caches in the interpreter |
412 // => nothing to do (keep this method around for future use) | |
413 } | |
414 | |
415 | |
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416 int Method::extra_stack_words() { |
710 | 417 // not an inline function, to avoid a header dependency on Interpreter |
1506 | 418 return extra_stack_entries() * Interpreter::stackElementSize; |
710 | 419 } |
420 | |
421 | |
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422 void Method::compute_size_of_parameters(Thread *thread) { |
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423 ArgumentSizeComputer asc(signature()); |
0 | 424 set_size_of_parameters(asc.size() + (is_static() ? 0 : 1)); |
425 } | |
426 | |
427 #ifdef CC_INTERP | |
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428 void Method::set_result_index(BasicType type) { |
0 | 429 _result_index = Interpreter::BasicType_as_index(type); |
430 } | |
431 #endif | |
432 | |
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433 BasicType Method::result_type() const { |
0 | 434 ResultTypeFinder rtf(signature()); |
435 return rtf.type(); | |
436 } | |
437 | |
438 | |
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439 bool Method::is_empty_method() const { |
0 | 440 return code_size() == 1 |
441 && *code_base() == Bytecodes::_return; | |
442 } | |
443 | |
444 | |
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445 bool Method::is_vanilla_constructor() const { |
0 | 446 // Returns true if this method is a vanilla constructor, i.e. an "<init>" "()V" method |
447 // which only calls the superclass vanilla constructor and possibly does stores of | |
448 // zero constants to local fields: | |
449 // | |
450 // aload_0 | |
451 // invokespecial | |
452 // indexbyte1 | |
453 // indexbyte2 | |
454 // | |
455 // followed by an (optional) sequence of: | |
456 // | |
457 // aload_0 | |
458 // aconst_null / iconst_0 / fconst_0 / dconst_0 | |
459 // putfield | |
460 // indexbyte1 | |
461 // indexbyte2 | |
462 // | |
463 // followed by: | |
464 // | |
465 // return | |
466 | |
467 assert(name() == vmSymbols::object_initializer_name(), "Should only be called for default constructors"); | |
468 assert(signature() == vmSymbols::void_method_signature(), "Should only be called for default constructors"); | |
469 int size = code_size(); | |
470 // Check if size match | |
471 if (size == 0 || size % 5 != 0) return false; | |
472 address cb = code_base(); | |
473 int last = size - 1; | |
474 if (cb[0] != Bytecodes::_aload_0 || cb[1] != Bytecodes::_invokespecial || cb[last] != Bytecodes::_return) { | |
475 // Does not call superclass default constructor | |
476 return false; | |
477 } | |
478 // Check optional sequence | |
479 for (int i = 4; i < last; i += 5) { | |
480 if (cb[i] != Bytecodes::_aload_0) return false; | |
481 if (!Bytecodes::is_zero_const(Bytecodes::cast(cb[i+1]))) return false; | |
482 if (cb[i+2] != Bytecodes::_putfield) return false; | |
483 } | |
484 return true; | |
485 } | |
486 | |
487 | |
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488 bool Method::compute_has_loops_flag() { |
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489 BytecodeStream bcs(this); |
0 | 490 Bytecodes::Code bc; |
491 | |
492 while ((bc = bcs.next()) >= 0) { | |
493 switch( bc ) { | |
494 case Bytecodes::_ifeq: | |
495 case Bytecodes::_ifnull: | |
496 case Bytecodes::_iflt: | |
497 case Bytecodes::_ifle: | |
498 case Bytecodes::_ifne: | |
499 case Bytecodes::_ifnonnull: | |
500 case Bytecodes::_ifgt: | |
501 case Bytecodes::_ifge: | |
502 case Bytecodes::_if_icmpeq: | |
503 case Bytecodes::_if_icmpne: | |
504 case Bytecodes::_if_icmplt: | |
505 case Bytecodes::_if_icmpgt: | |
506 case Bytecodes::_if_icmple: | |
507 case Bytecodes::_if_icmpge: | |
508 case Bytecodes::_if_acmpeq: | |
509 case Bytecodes::_if_acmpne: | |
510 case Bytecodes::_goto: | |
511 case Bytecodes::_jsr: | |
512 if( bcs.dest() < bcs.next_bci() ) _access_flags.set_has_loops(); | |
513 break; | |
514 | |
515 case Bytecodes::_goto_w: | |
516 case Bytecodes::_jsr_w: | |
517 if( bcs.dest_w() < bcs.next_bci() ) _access_flags.set_has_loops(); | |
518 break; | |
519 } | |
520 } | |
521 _access_flags.set_loops_flag_init(); | |
522 return _access_flags.has_loops(); | |
523 } | |
524 | |
525 | |
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526 bool Method::is_final_method() const { |
0 | 527 // %%% Should return true for private methods also, |
528 // since there is no way to override them. | |
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529 return is_final() || method_holder()->is_final(); |
0 | 530 } |
531 | |
532 | |
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533 bool Method::is_strict_method() const { |
0 | 534 return is_strict(); |
535 } | |
536 | |
537 | |
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538 bool Method::can_be_statically_bound() const { |
0 | 539 if (is_final_method()) return true; |
540 return vtable_index() == nonvirtual_vtable_index; | |
541 } | |
542 | |
543 | |
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544 bool Method::is_accessor() const { |
0 | 545 if (code_size() != 5) return false; |
546 if (size_of_parameters() != 1) return false; | |
2142 | 547 if (java_code_at(0) != Bytecodes::_aload_0 ) return false; |
548 if (java_code_at(1) != Bytecodes::_getfield) return false; | |
549 if (java_code_at(4) != Bytecodes::_areturn && | |
550 java_code_at(4) != Bytecodes::_ireturn ) return false; | |
0 | 551 return true; |
552 } | |
553 | |
554 | |
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555 bool Method::is_initializer() const { |
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556 return name() == vmSymbols::object_initializer_name() || is_static_initializer(); |
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557 } |
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558 |
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559 bool Method::has_valid_initializer_flags() const { |
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560 return (is_static() || |
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561 method_holder()->major_version() < 51); |
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562 } |
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563 |
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564 bool Method::is_static_initializer() const { |
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565 // For classfiles version 51 or greater, ensure that the clinit method is |
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566 // static. Non-static methods with the name "<clinit>" are not static |
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567 // initializers. (older classfiles exempted for backward compatibility) |
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568 return name() == vmSymbols::class_initializer_name() && |
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569 has_valid_initializer_flags(); |
0 | 570 } |
571 | |
572 | |
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573 objArrayHandle Method::resolved_checked_exceptions_impl(Method* this_oop, TRAPS) { |
0 | 574 int length = this_oop->checked_exceptions_length(); |
575 if (length == 0) { // common case | |
576 return objArrayHandle(THREAD, Universe::the_empty_class_klass_array()); | |
577 } else { | |
578 methodHandle h_this(THREAD, this_oop); | |
1142 | 579 objArrayOop m_oop = oopFactory::new_objArray(SystemDictionary::Class_klass(), length, CHECK_(objArrayHandle())); |
0 | 580 objArrayHandle mirrors (THREAD, m_oop); |
581 for (int i = 0; i < length; i++) { | |
582 CheckedExceptionElement* table = h_this->checked_exceptions_start(); // recompute on each iteration, not gc safe | |
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583 Klass* k = h_this->constants()->klass_at(table[i].class_cp_index, CHECK_(objArrayHandle())); |
6983 | 584 assert(k->is_subclass_of(SystemDictionary::Throwable_klass()), "invalid exception class"); |
585 mirrors->obj_at_put(i, k->java_mirror()); | |
0 | 586 } |
587 return mirrors; | |
588 } | |
589 }; | |
590 | |
591 | |
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592 int Method::line_number_from_bci(int bci) const { |
0 | 593 if (bci == SynchronizationEntryBCI) bci = 0; |
594 assert(bci == 0 || 0 <= bci && bci < code_size(), "illegal bci"); | |
595 int best_bci = 0; | |
596 int best_line = -1; | |
597 | |
598 if (has_linenumber_table()) { | |
599 // The line numbers are a short array of 2-tuples [start_pc, line_number]. | |
600 // Not necessarily sorted and not necessarily one-to-one. | |
601 CompressedLineNumberReadStream stream(compressed_linenumber_table()); | |
602 while (stream.read_pair()) { | |
603 if (stream.bci() == bci) { | |
604 // perfect match | |
605 return stream.line(); | |
606 } else { | |
607 // update best_bci/line | |
608 if (stream.bci() < bci && stream.bci() >= best_bci) { | |
609 best_bci = stream.bci(); | |
610 best_line = stream.line(); | |
611 } | |
612 } | |
613 } | |
614 } | |
615 return best_line; | |
616 } | |
617 | |
618 | |
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619 bool Method::is_klass_loaded_by_klass_index(int klass_index) const { |
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620 if( constants()->tag_at(klass_index).is_unresolved_klass() ) { |
0 | 621 Thread *thread = Thread::current(); |
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622 Symbol* klass_name = constants()->klass_name_at(klass_index); |
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623 Handle loader(thread, method_holder()->class_loader()); |
6983 | 624 Handle prot (thread, method_holder()->protection_domain()); |
0 | 625 return SystemDictionary::find(klass_name, loader, prot, thread) != NULL; |
626 } else { | |
627 return true; | |
628 } | |
629 } | |
630 | |
631 | |
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632 bool Method::is_klass_loaded(int refinfo_index, bool must_be_resolved) const { |
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633 int klass_index = constants()->klass_ref_index_at(refinfo_index); |
0 | 634 if (must_be_resolved) { |
635 // Make sure klass is resolved in constantpool. | |
636 if (constants()->tag_at(klass_index).is_unresolved_klass()) return false; | |
637 } | |
638 return is_klass_loaded_by_klass_index(klass_index); | |
639 } | |
640 | |
641 | |
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642 void Method::set_native_function(address function, bool post_event_flag) { |
0 | 643 assert(function != NULL, "use clear_native_function to unregister natives"); |
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644 assert(!is_method_handle_intrinsic() || function == SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), ""); |
0 | 645 address* native_function = native_function_addr(); |
646 | |
647 // We can see racers trying to place the same native function into place. Once | |
648 // is plenty. | |
649 address current = *native_function; | |
650 if (current == function) return; | |
651 if (post_event_flag && JvmtiExport::should_post_native_method_bind() && | |
652 function != NULL) { | |
653 // native_method_throw_unsatisfied_link_error_entry() should only | |
654 // be passed when post_event_flag is false. | |
655 assert(function != | |
656 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
657 "post_event_flag mis-match"); | |
658 | |
659 // post the bind event, and possible change the bind function | |
660 JvmtiExport::post_native_method_bind(this, &function); | |
661 } | |
662 *native_function = function; | |
663 // This function can be called more than once. We must make sure that we always | |
664 // use the latest registered method -> check if a stub already has been generated. | |
665 // If so, we have to make it not_entrant. | |
666 nmethod* nm = code(); // Put it into local variable to guard against concurrent updates | |
667 if (nm != NULL) { | |
668 nm->make_not_entrant(); | |
669 } | |
670 } | |
671 | |
672 | |
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673 bool Method::has_native_function() const { |
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674 if (is_method_handle_intrinsic()) |
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675 return false; // special-cased in SharedRuntime::generate_native_wrapper |
0 | 676 address func = native_function(); |
677 return (func != NULL && func != SharedRuntime::native_method_throw_unsatisfied_link_error_entry()); | |
678 } | |
679 | |
680 | |
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681 void Method::clear_native_function() { |
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682 // Note: is_method_handle_intrinsic() is allowed here. |
0 | 683 set_native_function( |
684 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
685 !native_bind_event_is_interesting); | |
686 clear_code(); | |
687 } | |
688 | |
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689 address Method::critical_native_function() { |
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690 methodHandle mh(this); |
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691 return NativeLookup::lookup_critical_entry(mh); |
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692 } |
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693 |
0 | 694 |
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695 void Method::set_signature_handler(address handler) { |
0 | 696 address* signature_handler = signature_handler_addr(); |
697 *signature_handler = handler; | |
698 } | |
699 | |
700 | |
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701 void Method::print_made_not_compilable(int comp_level, bool is_osr, bool report) { |
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702 if (PrintCompilation && report) { |
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703 ttyLocker ttyl; |
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704 tty->print("made not %scompilable on ", is_osr ? "OSR " : ""); |
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705 if (comp_level == CompLevel_all) { |
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706 tty->print("all levels "); |
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707 } else { |
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708 tty->print("levels "); |
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709 for (int i = (int)CompLevel_none; i <= comp_level; i++) { |
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710 tty->print("%d ", i); |
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711 } |
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712 } |
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713 this->print_short_name(tty); |
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714 int size = this->code_size(); |
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715 if (size > 0) |
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716 tty->print(" (%d bytes)", size); |
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717 tty->cr(); |
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718 } |
0 | 719 if ((TraceDeoptimization || LogCompilation) && (xtty != NULL)) { |
720 ttyLocker ttyl; | |
6843 | 721 xtty->begin_elem("make_not_%scompilable thread='" UINTX_FORMAT "'", |
722 is_osr ? "osr_" : "", os::current_thread_id()); | |
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723 xtty->method(this); |
0 | 724 xtty->stamp(); |
725 xtty->end_elem(); | |
726 } | |
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727 } |
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728 |
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729 bool Method::is_not_compilable(int comp_level) const { |
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730 if (number_of_breakpoints() > 0) |
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731 return true; |
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732 if (is_method_handle_intrinsic()) |
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733 return !is_synthetic(); // the generated adapters must be compiled |
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734 if (comp_level == CompLevel_any) |
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735 return is_not_c1_compilable() || is_not_c2_compilable(); |
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736 if (is_c1_compile(comp_level)) |
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737 return is_not_c1_compilable(); |
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738 if (is_c2_compile(comp_level)) |
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739 return is_not_c2_compilable(); |
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740 return false; |
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741 } |
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742 |
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743 // call this when compiler finds that this method is not compilable |
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744 void Method::set_not_compilable(int comp_level, bool report) { |
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745 print_made_not_compilable(comp_level, /*is_osr*/ false, report); |
1783 | 746 if (comp_level == CompLevel_all) { |
747 set_not_c1_compilable(); | |
748 set_not_c2_compilable(); | |
749 } else { | |
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750 if (is_c1_compile(comp_level)) |
1783 | 751 set_not_c1_compilable(); |
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752 if (is_c2_compile(comp_level)) |
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753 set_not_c2_compilable(); |
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754 } |
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755 CompilationPolicy::policy()->disable_compilation(this); |
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756 } |
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757 |
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758 bool Method::is_not_osr_compilable(int comp_level) const { |
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759 if (is_not_compilable(comp_level)) |
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760 return true; |
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761 if (comp_level == CompLevel_any) |
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762 return is_not_c1_osr_compilable() || is_not_c2_osr_compilable(); |
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763 if (is_c1_compile(comp_level)) |
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764 return is_not_c1_osr_compilable(); |
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765 if (is_c2_compile(comp_level)) |
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766 return is_not_c2_osr_compilable(); |
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767 return false; |
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768 } |
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769 |
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770 void Method::set_not_osr_compilable(int comp_level, bool report) { |
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771 print_made_not_compilable(comp_level, /*is_osr*/ true, report); |
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772 if (comp_level == CompLevel_all) { |
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773 set_not_c1_osr_compilable(); |
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774 set_not_c2_osr_compilable(); |
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775 } else { |
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776 if (is_c1_compile(comp_level)) |
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777 set_not_c1_osr_compilable(); |
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778 if (is_c2_compile(comp_level)) |
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779 set_not_c2_osr_compilable(); |
0 | 780 } |
1783 | 781 CompilationPolicy::policy()->disable_compilation(this); |
0 | 782 } |
783 | |
784 // Revert to using the interpreter and clear out the nmethod | |
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785 void Method::clear_code() { |
0 | 786 |
787 // this may be NULL if c2i adapters have not been made yet | |
788 // Only should happen at allocate time. | |
789 if (_adapter == NULL) { | |
790 _from_compiled_entry = NULL; | |
791 } else { | |
792 _from_compiled_entry = _adapter->get_c2i_entry(); | |
793 } | |
794 OrderAccess::storestore(); | |
795 _from_interpreted_entry = _i2i_entry; | |
796 OrderAccess::storestore(); | |
797 _code = NULL; | |
798 } | |
799 | |
800 // Called by class data sharing to remove any entry points (which are not shared) | |
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801 void Method::unlink_method() { |
0 | 802 _code = NULL; |
803 _i2i_entry = NULL; | |
804 _from_interpreted_entry = NULL; | |
805 if (is_native()) { | |
806 *native_function_addr() = NULL; | |
807 set_signature_handler(NULL); | |
808 } | |
809 NOT_PRODUCT(set_compiled_invocation_count(0);) | |
810 invocation_counter()->reset(); | |
811 backedge_counter()->reset(); | |
812 _adapter = NULL; | |
813 _from_compiled_entry = NULL; | |
814 assert(_method_data == NULL, "unexpected method data?"); | |
815 set_method_data(NULL); | |
816 set_interpreter_throwout_count(0); | |
817 set_interpreter_invocation_count(0); | |
818 } | |
819 | |
820 // Called when the method_holder is getting linked. Setup entrypoints so the method | |
821 // is ready to be called from interpreter, compiler, and vtables. | |
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822 void Method::link_method(methodHandle h_method, TRAPS) { |
3404 | 823 // If the code cache is full, we may reenter this function for the |
824 // leftover methods that weren't linked. | |
825 if (_i2i_entry != NULL) return; | |
826 | |
0 | 827 assert(_adapter == NULL, "init'd to NULL" ); |
828 assert( _code == NULL, "nothing compiled yet" ); | |
829 | |
830 // Setup interpreter entrypoint | |
831 assert(this == h_method(), "wrong h_method()" ); | |
832 address entry = Interpreter::entry_for_method(h_method); | |
833 assert(entry != NULL, "interpreter entry must be non-null"); | |
834 // Sets both _i2i_entry and _from_interpreted_entry | |
835 set_interpreter_entry(entry); | |
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836 if (is_native() && !is_method_handle_intrinsic()) { |
0 | 837 set_native_function( |
838 SharedRuntime::native_method_throw_unsatisfied_link_error_entry(), | |
839 !native_bind_event_is_interesting); | |
840 } | |
841 | |
842 // Setup compiler entrypoint. This is made eagerly, so we do not need | |
843 // special handling of vtables. An alternative is to make adapters more | |
844 // lazily by calling make_adapter() from from_compiled_entry() for the | |
845 // normal calls. For vtable calls life gets more complicated. When a | |
846 // call-site goes mega-morphic we need adapters in all methods which can be | |
847 // called from the vtable. We need adapters on such methods that get loaded | |
848 // later. Ditto for mega-morphic itable calls. If this proves to be a | |
849 // problem we'll make these lazily later. | |
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850 (void) make_adapters(h_method, CHECK); |
0 | 851 |
852 // ONLY USE the h_method now as make_adapter may have blocked | |
853 | |
854 } | |
855 | |
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856 address Method::make_adapters(methodHandle mh, TRAPS) { |
0 | 857 // Adapters for compiled code are made eagerly here. They are fairly |
858 // small (generally < 100 bytes) and quick to make (and cached and shared) | |
859 // so making them eagerly shouldn't be too expensive. | |
860 AdapterHandlerEntry* adapter = AdapterHandlerLibrary::get_adapter(mh); | |
861 if (adapter == NULL ) { | |
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862 THROW_MSG_NULL(vmSymbols::java_lang_VirtualMachineError(), "out of space in CodeCache for adapters"); |
0 | 863 } |
864 | |
865 mh->set_adapter_entry(adapter); | |
866 mh->_from_compiled_entry = adapter->get_c2i_entry(); | |
867 return adapter->get_c2i_entry(); | |
868 } | |
869 | |
870 // The verified_code_entry() must be called when a invoke is resolved | |
871 // on this method. | |
872 | |
873 // It returns the compiled code entry point, after asserting not null. | |
874 // This function is called after potential safepoints so that nmethod | |
875 // or adapter that it points to is still live and valid. | |
876 // This function must not hit a safepoint! | |
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877 address Method::verified_code_entry() { |
0 | 878 debug_only(No_Safepoint_Verifier nsv;) |
1202 | 879 nmethod *code = (nmethod *)OrderAccess::load_ptr_acquire(&_code); |
880 if (code == NULL && UseCodeCacheFlushing) { | |
881 nmethod *saved_code = CodeCache::find_and_remove_saved_code(this); | |
882 if (saved_code != NULL) { | |
883 methodHandle method(this); | |
884 assert( ! saved_code->is_osr_method(), "should not get here for osr" ); | |
885 set_code( method, saved_code ); | |
886 } | |
887 } | |
888 | |
0 | 889 assert(_from_compiled_entry != NULL, "must be set"); |
890 return _from_compiled_entry; | |
891 } | |
892 | |
893 // Check that if an nmethod ref exists, it has a backlink to this or no backlink at all | |
894 // (could be racing a deopt). | |
895 // Not inline to avoid circular ref. | |
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896 bool Method::check_code() const { |
0 | 897 // cached in a register or local. There's a race on the value of the field. |
898 nmethod *code = (nmethod *)OrderAccess::load_ptr_acquire(&_code); | |
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899 return code == NULL || (code->method() == NULL) || (code->method() == (Method*)this && !code->is_osr_method()); |
0 | 900 } |
901 | |
902 // Install compiled code. Instantly it can execute. | |
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903 void Method::set_code(methodHandle mh, nmethod *code) { |
0 | 904 assert( code, "use clear_code to remove code" ); |
905 assert( mh->check_code(), "" ); | |
906 | |
907 guarantee(mh->adapter() != NULL, "Adapter blob must already exist!"); | |
908 | |
909 // These writes must happen in this order, because the interpreter will | |
910 // directly jump to from_interpreted_entry which jumps to an i2c adapter | |
911 // which jumps to _from_compiled_entry. | |
912 mh->_code = code; // Assign before allowing compiled code to exec | |
913 | |
914 int comp_level = code->comp_level(); | |
915 // In theory there could be a race here. In practice it is unlikely | |
916 // and not worth worrying about. | |
1783 | 917 if (comp_level > mh->highest_comp_level()) { |
918 mh->set_highest_comp_level(comp_level); | |
0 | 919 } |
920 | |
921 OrderAccess::storestore(); | |
1692 | 922 #ifdef SHARK |
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923 mh->_from_interpreted_entry = code->insts_begin(); |
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924 #else //!SHARK |
0 | 925 mh->_from_compiled_entry = code->verified_entry_point(); |
926 OrderAccess::storestore(); | |
927 // Instantly compiled code can execute. | |
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928 if (!mh->is_method_handle_intrinsic()) |
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929 mh->_from_interpreted_entry = mh->get_i2c_entry(); |
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930 #endif //!SHARK |
0 | 931 } |
932 | |
933 | |
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934 bool Method::is_overridden_in(Klass* k) const { |
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935 InstanceKlass* ik = InstanceKlass::cast(k); |
0 | 936 |
937 if (ik->is_interface()) return false; | |
938 | |
939 // If method is an interface, we skip it - except if it | |
940 // is a miranda method | |
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941 if (method_holder()->is_interface()) { |
0 | 942 // Check that method is not a miranda method |
943 if (ik->lookup_method(name(), signature()) == NULL) { | |
944 // No implementation exist - so miranda method | |
945 return false; | |
946 } | |
947 return true; | |
948 } | |
949 | |
950 assert(ik->is_subclass_of(method_holder()), "should be subklass"); | |
951 assert(ik->vtable() != NULL, "vtable should exist"); | |
952 if (vtable_index() == nonvirtual_vtable_index) { | |
953 return false; | |
954 } else { | |
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955 Method* vt_m = ik->method_at_vtable(vtable_index()); |
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956 return vt_m != this; |
0 | 957 } |
958 } | |
959 | |
960 | |
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961 // give advice about whether this Method* should be cached or not |
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962 bool Method::should_not_be_cached() const { |
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963 if (is_old()) { |
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964 // This method has been redefined. It is either EMCP or obsolete |
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965 // and we don't want to cache it because that would pin the method |
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966 // down and prevent it from being collectible if and when it |
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967 // finishes executing. |
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968 return true; |
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969 } |
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970 |
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971 // caching this method should be just fine |
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972 return false; |
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973 } |
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974 |
710 | 975 // Constant pool structure for invoke methods: |
976 enum { | |
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977 _imcp_invoke_name = 1, // utf8: 'invokeExact', etc. |
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978 _imcp_invoke_signature, // utf8: (variable Symbol*) |
710 | 979 _imcp_limit |
980 }; | |
981 | |
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982 // Test if this method is an MH adapter frame generated by Java code. |
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983 // Cf. java/lang/invoke/InvokerBytecodeGenerator |
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984 bool Method::is_compiled_lambda_form() const { |
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985 return intrinsic_id() == vmIntrinsics::_compiledLambdaForm; |
710 | 986 } |
987 | |
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988 // Test if this method is an internal MH primitive method. |
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989 bool Method::is_method_handle_intrinsic() const { |
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990 vmIntrinsics::ID iid = intrinsic_id(); |
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991 return (MethodHandles::is_signature_polymorphic(iid) && |
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992 MethodHandles::is_signature_polymorphic_intrinsic(iid)); |
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993 } |
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994 |
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995 bool Method::has_member_arg() const { |
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996 vmIntrinsics::ID iid = intrinsic_id(); |
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997 return (MethodHandles::is_signature_polymorphic(iid) && |
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998 MethodHandles::has_member_arg(iid)); |
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999 } |
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1000 |
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1001 // Make an instance of a signature-polymorphic internal MH primitive. |
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1002 methodHandle Method::make_method_handle_intrinsic(vmIntrinsics::ID iid, |
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1003 Symbol* signature, |
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1004 TRAPS) { |
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1005 ResourceMark rm; |
710 | 1006 methodHandle empty; |
1007 | |
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1008 KlassHandle holder = SystemDictionary::MethodHandle_klass(); |
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1009 Symbol* name = MethodHandles::signature_polymorphic_intrinsic_name(iid); |
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1010 assert(iid == MethodHandles::signature_polymorphic_name_id(name), ""); |
710 | 1011 if (TraceMethodHandles) { |
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1012 tty->print_cr("make_method_handle_intrinsic MH.%s%s", name->as_C_string(), signature->as_C_string()); |
710 | 1013 } |
1014 | |
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1015 // invariant: cp->symbol_at_put is preceded by a refcount increment (more usually a lookup) |
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1016 name->increment_refcount(); |
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1017 signature->increment_refcount(); |
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1018 |
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1019 int cp_length = _imcp_limit; |
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1020 ClassLoaderData* loader_data = holder->class_loader_data(); |
710 | 1021 constantPoolHandle cp; |
1022 { | |
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1023 ConstantPool* cp_oop = ConstantPool::allocate(loader_data, cp_length, CHECK_(empty)); |
710 | 1024 cp = constantPoolHandle(THREAD, cp_oop); |
1025 } | |
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1026 cp->set_pool_holder(InstanceKlass::cast(holder())); |
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1027 cp->symbol_at_put(_imcp_invoke_name, name); |
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1028 cp->symbol_at_put(_imcp_invoke_signature, signature); |
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1029 cp->set_preresolution(); |
710 | 1030 |
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1031 // decide on access bits: public or not? |
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1032 int flags_bits = (JVM_ACC_NATIVE | JVM_ACC_SYNTHETIC | JVM_ACC_FINAL); |
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1033 bool must_be_static = MethodHandles::is_signature_polymorphic_static(iid); |
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1034 if (must_be_static) flags_bits |= JVM_ACC_STATIC; |
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1035 assert((flags_bits & JVM_ACC_PUBLIC) == 0, "do not expose these methods"); |
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1036 |
710 | 1037 methodHandle m; |
1038 { | |
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1039 Method* m_oop = Method::allocate(loader_data, 0, accessFlags_from(flags_bits), |
6934 | 1040 0, 0, 0, 0, ConstMethod::NORMAL, CHECK_(empty)); |
710 | 1041 m = methodHandle(THREAD, m_oop); |
1042 } | |
1043 m->set_constants(cp()); | |
1044 m->set_name_index(_imcp_invoke_name); | |
1045 m->set_signature_index(_imcp_invoke_signature); | |
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1046 assert(MethodHandles::is_signature_polymorphic_name(m->name()), ""); |
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1047 assert(m->signature() == signature, ""); |
710 | 1048 #ifdef CC_INTERP |
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1049 ResultTypeFinder rtf(signature); |
710 | 1050 m->set_result_index(rtf.type()); |
1051 #endif | |
1052 m->compute_size_of_parameters(THREAD); | |
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1053 m->init_intrinsic_id(); |
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1054 assert(m->is_method_handle_intrinsic(), ""); |
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1055 #ifdef ASSERT |
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1056 if (!MethodHandles::is_signature_polymorphic(m->intrinsic_id())) m->print(); |
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1057 assert(MethodHandles::is_signature_polymorphic(m->intrinsic_id()), "must be an invoker"); |
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1058 assert(m->intrinsic_id() == iid, "correctly predicted iid"); |
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1059 #endif //ASSERT |
710 | 1060 |
1061 // Finally, set up its entry points. | |
1062 assert(m->can_be_statically_bound(), ""); | |
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1063 m->set_vtable_index(Method::nonvirtual_vtable_index); |
710 | 1064 m->link_method(m, CHECK_(empty)); |
1065 | |
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1066 if (TraceMethodHandles && (Verbose || WizardMode)) |
710 | 1067 m->print_on(tty); |
1068 | |
1069 return m; | |
1070 } | |
1071 | |
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1072 Klass* Method::check_non_bcp_klass(Klass* klass) { |
6983 | 1073 if (klass != NULL && klass->class_loader() != NULL) { |
1074 if (klass->oop_is_objArray()) | |
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1075 klass = ObjArrayKlass::cast(klass)->bottom_klass(); |
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1076 return klass; |
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1077 } |
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1078 return NULL; |
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1079 } |
710 | 1080 |
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1081 |
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1082 methodHandle Method::clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length, |
0 | 1083 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS) { |
1084 // Code below does not work for native methods - they should never get rewritten anyway | |
1085 assert(!m->is_native(), "cannot rewrite native methods"); | |
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1086 // Allocate new Method* |
0 | 1087 AccessFlags flags = m->access_flags(); |
1088 int checked_exceptions_len = m->checked_exceptions_length(); | |
1089 int localvariable_len = m->localvariable_table_length(); | |
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1090 int exception_table_len = m->exception_table_length(); |
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1091 |
6934 | 1092 ClassLoaderData* loader_data = m->method_holder()->class_loader_data(); |
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1093 Method* newm_oop = Method::allocate(loader_data, |
6934 | 1094 new_code_length, |
1095 flags, | |
1096 new_compressed_linenumber_size, | |
1097 localvariable_len, | |
1098 exception_table_len, | |
1099 checked_exceptions_len, | |
1100 m->method_type(), | |
1101 CHECK_(methodHandle())); | |
0 | 1102 methodHandle newm (THREAD, newm_oop); |
1103 int new_method_size = newm->method_size(); | |
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1104 |
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1105 // Create a shallow copy of Method part, but be careful to preserve the new ConstMethod* |
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1106 ConstMethod* newcm = newm->constMethod(); |
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1107 int new_const_method_size = newm->constMethod()->size(); |
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1108 |
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1109 memcpy(newm(), m(), sizeof(Method)); |
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1110 |
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1111 // Create shallow copy of ConstMethod. |
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1112 memcpy(newcm, m->constMethod(), sizeof(ConstMethod)); |
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1113 |
0 | 1114 // Reset correct method/const method, method size, and parameter info |
1115 newm->set_constMethod(newcm); | |
1116 newm->constMethod()->set_code_size(new_code_length); | |
1117 newm->constMethod()->set_constMethod_size(new_const_method_size); | |
1118 newm->set_method_size(new_method_size); | |
1119 assert(newm->code_size() == new_code_length, "check"); | |
1120 assert(newm->checked_exceptions_length() == checked_exceptions_len, "check"); | |
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1121 assert(newm->exception_table_length() == exception_table_len, "check"); |
0 | 1122 assert(newm->localvariable_table_length() == localvariable_len, "check"); |
1123 // Copy new byte codes | |
1124 memcpy(newm->code_base(), new_code, new_code_length); | |
1125 // Copy line number table | |
1126 if (new_compressed_linenumber_size > 0) { | |
1127 memcpy(newm->compressed_linenumber_table(), | |
1128 new_compressed_linenumber_table, | |
1129 new_compressed_linenumber_size); | |
1130 } | |
1131 // Copy checked_exceptions | |
1132 if (checked_exceptions_len > 0) { | |
1133 memcpy(newm->checked_exceptions_start(), | |
1134 m->checked_exceptions_start(), | |
1135 checked_exceptions_len * sizeof(CheckedExceptionElement)); | |
1136 } | |
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1137 // Copy exception table |
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1138 if (exception_table_len > 0) { |
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1139 memcpy(newm->exception_table_start(), |
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1140 m->exception_table_start(), |
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1141 exception_table_len * sizeof(ExceptionTableElement)); |
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1142 } |
0 | 1143 // Copy local variable number table |
1144 if (localvariable_len > 0) { | |
1145 memcpy(newm->localvariable_table_start(), | |
1146 m->localvariable_table_start(), | |
1147 localvariable_len * sizeof(LocalVariableTableElement)); | |
1148 } | |
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1149 // Copy stackmap table |
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1150 if (m->has_stackmap_table()) { |
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1151 int code_attribute_length = m->stackmap_data()->length(); |
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1152 Array<u1>* stackmap_data = |
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1153 MetadataFactory::new_array<u1>(loader_data, code_attribute_length, 0, CHECK_NULL); |
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1154 memcpy((void*)stackmap_data->adr_at(0), |
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1155 (void*)m->stackmap_data()->adr_at(0), code_attribute_length); |
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1156 newm->set_stackmap_data(stackmap_data); |
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1157 } |
518
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1158 |
0 | 1159 return newm; |
1160 } | |
1161 | |
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1162 vmSymbols::SID Method::klass_id_for_intrinsics(Klass* holder) { |
0 | 1163 // if loader is not the default loader (i.e., != NULL), we can't know the intrinsics |
1164 // because we are not loading from core libraries | |
6894 | 1165 // exception: the AES intrinsics come from lib/ext/sunjce_provider.jar |
1166 // which does not use the class default class loader so we check for its loader here | |
1167 if ((InstanceKlass::cast(holder)->class_loader() != NULL) && | |
1168 InstanceKlass::cast(holder)->class_loader()->klass()->name() != vmSymbols::sun_misc_Launcher_ExtClassLoader()) { | |
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1169 return vmSymbols::NO_SID; // regardless of name, no intrinsics here |
6894 | 1170 } |
0 | 1171 |
1172 // see if the klass name is well-known: | |
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1173 Symbol* klass_name = InstanceKlass::cast(holder)->name(); |
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1174 return vmSymbols::find_sid(klass_name); |
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1175 } |
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1176 |
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1177 void Method::init_intrinsic_id() { |
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1178 assert(_intrinsic_id == vmIntrinsics::_none, "do this just once"); |
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1179 const uintptr_t max_id_uint = right_n_bits((int)(sizeof(_intrinsic_id) * BitsPerByte)); |
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1180 assert((uintptr_t)vmIntrinsics::ID_LIMIT <= max_id_uint, "else fix size"); |
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1181 assert(intrinsic_id_size_in_bytes() == sizeof(_intrinsic_id), ""); |
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1182 |
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1183 // the klass name is well-known: |
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1184 vmSymbols::SID klass_id = klass_id_for_intrinsics(method_holder()); |
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1185 assert(klass_id != vmSymbols::NO_SID, "caller responsibility"); |
0 | 1186 |
1187 // ditto for method and signature: | |
1188 vmSymbols::SID name_id = vmSymbols::find_sid(name()); | |
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1189 if (klass_id != vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_MethodHandle) |
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1190 && name_id == vmSymbols::NO_SID) |
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1191 return; |
0 | 1192 vmSymbols::SID sig_id = vmSymbols::find_sid(signature()); |
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1193 if (klass_id != vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_MethodHandle) |
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1194 && sig_id == vmSymbols::NO_SID) return; |
0 | 1195 jshort flags = access_flags().as_short(); |
1196 | |
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1197 vmIntrinsics::ID id = vmIntrinsics::find_id(klass_id, name_id, sig_id, flags); |
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1198 if (id != vmIntrinsics::_none) { |
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1199 set_intrinsic_id(id); |
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1200 return; |
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1201 } |
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1202 |
0 | 1203 // A few slightly irregular cases: |
1204 switch (klass_id) { | |
1205 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_StrictMath): | |
1206 // Second chance: check in regular Math. | |
1207 switch (name_id) { | |
1208 case vmSymbols::VM_SYMBOL_ENUM_NAME(min_name): | |
1209 case vmSymbols::VM_SYMBOL_ENUM_NAME(max_name): | |
1210 case vmSymbols::VM_SYMBOL_ENUM_NAME(sqrt_name): | |
1211 // pretend it is the corresponding method in the non-strict class: | |
1212 klass_id = vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_Math); | |
856
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1213 id = vmIntrinsics::find_id(klass_id, name_id, sig_id, flags); |
0 | 1214 break; |
1215 } | |
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1216 break; |
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1217 |
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1218 // Signature-polymorphic methods: MethodHandle.invoke*, InvokeDynamic.*. |
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1219 case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_MethodHandle): |
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1220 if (!is_native()) break; |
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1221 id = MethodHandles::signature_polymorphic_name_id(method_holder(), name()); |
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1222 if (is_static() != MethodHandles::is_signature_polymorphic_static(id)) |
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1223 id = vmIntrinsics::_none; |
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1224 break; |
0 | 1225 } |
1226 | |
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1227 if (id != vmIntrinsics::_none) { |
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1228 // Set up its iid. It is an alias method. |
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1229 set_intrinsic_id(id); |
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1230 return; |
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1231 } |
0 | 1232 } |
1233 | |
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1234 // These two methods are static since a GC may move the Method |
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1235 bool Method::load_signature_classes(methodHandle m, TRAPS) { |
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1236 if (THREAD->is_Compiler_thread()) { |
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1237 // There is nothing useful this routine can do from within the Compile thread. |
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1238 // Hopefully, the signature contains only well-known classes. |
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1239 // We could scan for this and return true/false, but the caller won't care. |
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1240 return false; |
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1241 } |
0 | 1242 bool sig_is_loaded = true; |
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1243 Handle class_loader(THREAD, m->method_holder()->class_loader()); |
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1244 Handle protection_domain(THREAD, m->method_holder()->protection_domain()); |
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1245 ResourceMark rm(THREAD); |
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1246 Symbol* signature = m->signature(); |
0 | 1247 for(SignatureStream ss(signature); !ss.is_done(); ss.next()) { |
1248 if (ss.is_object()) { | |
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1249 Symbol* sym = ss.as_symbol(CHECK_(false)); |
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1250 Symbol* name = sym; |
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1251 Klass* klass = SystemDictionary::resolve_or_null(name, class_loader, |
0 | 1252 protection_domain, THREAD); |
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1253 // We are loading classes eagerly. If a ClassNotFoundException or |
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1254 // a LinkageError was generated, be sure to ignore it. |
0 | 1255 if (HAS_PENDING_EXCEPTION) { |
1142 | 1256 if (PENDING_EXCEPTION->is_a(SystemDictionary::ClassNotFoundException_klass()) || |
1257 PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) { | |
0 | 1258 CLEAR_PENDING_EXCEPTION; |
1259 } else { | |
1260 return false; | |
1261 } | |
1262 } | |
1263 if( klass == NULL) { sig_is_loaded = false; } | |
1264 } | |
1265 } | |
1266 return sig_is_loaded; | |
1267 } | |
1268 | |
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1269 bool Method::has_unloaded_classes_in_signature(methodHandle m, TRAPS) { |
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1270 Handle class_loader(THREAD, m->method_holder()->class_loader()); |
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1271 Handle protection_domain(THREAD, m->method_holder()->protection_domain()); |
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1272 ResourceMark rm(THREAD); |
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1273 Symbol* signature = m->signature(); |
0 | 1274 for(SignatureStream ss(signature); !ss.is_done(); ss.next()) { |
1275 if (ss.type() == T_OBJECT) { | |
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1276 Symbol* name = ss.as_symbol_or_null(); |
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1277 if (name == NULL) return true; |
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1278 Klass* klass = SystemDictionary::find(name, class_loader, protection_domain, THREAD); |
0 | 1279 if (klass == NULL) return true; |
1280 } | |
1281 } | |
1282 return false; | |
1283 } | |
1284 | |
1285 // Exposed so field engineers can debug VM | |
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1286 void Method::print_short_name(outputStream* st) { |
0 | 1287 ResourceMark rm; |
1288 #ifdef PRODUCT | |
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1289 st->print(" %s::", method_holder()->external_name()); |
0 | 1290 #else |
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1291 st->print(" %s::", method_holder()->internal_name()); |
0 | 1292 #endif |
1293 name()->print_symbol_on(st); | |
1294 if (WizardMode) signature()->print_symbol_on(st); | |
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1295 else if (MethodHandles::is_signature_polymorphic(intrinsic_id())) |
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1296 MethodHandles::print_as_basic_type_signature_on(st, signature(), true); |
0 | 1297 } |
1298 | |
1299 // This is only done during class loading, so it is OK to assume method_idnum matches the methods() array | |
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1300 static void reorder_based_on_method_index(Array<Method*>* methods, |
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1301 Array<AnnotationArray*>* annotations, |
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1302 GrowableArray<AnnotationArray*>* temp_array) { |
0 | 1303 if (annotations == NULL) { |
1304 return; | |
1305 } | |
1306 | |
1307 int length = methods->length(); | |
1308 int i; | |
1309 // Copy to temp array | |
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1310 temp_array->clear(); |
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1311 for (i = 0; i < length; i++) { |
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1312 temp_array->append(annotations->at(i)); |
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1313 } |
0 | 1314 |
1315 // Copy back using old method indices | |
1316 for (i = 0; i < length; i++) { | |
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1317 Method* m = methods->at(i); |
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1318 annotations->at_put(i, temp_array->at(m->method_idnum())); |
0 | 1319 } |
1320 } | |
1321 | |
3779 | 1322 // Comparer for sorting an object array containing |
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1323 // Method*s. |
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1324 static int method_comparator(Method* a, Method* b) { |
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1325 return a->name()->fast_compare(b->name()); |
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1326 } |
0 | 1327 |
1328 // This is only done during class loading, so it is OK to assume method_idnum matches the methods() array | |
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1329 void Method::sort_methods(Array<Method*>* methods, |
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1330 Array<AnnotationArray*>* methods_annotations, |
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1331 Array<AnnotationArray*>* methods_parameter_annotations, |
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1332 Array<AnnotationArray*>* methods_default_annotations, |
0 | 1333 bool idempotent) { |
1334 int length = methods->length(); | |
1335 if (length > 1) { | |
1336 bool do_annotations = false; | |
1337 if (methods_annotations != NULL || | |
1338 methods_parameter_annotations != NULL || | |
1339 methods_default_annotations != NULL) { | |
1340 do_annotations = true; | |
1341 } | |
1342 if (do_annotations) { | |
1343 // Remember current method ordering so we can reorder annotations | |
1344 for (int i = 0; i < length; i++) { | |
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1345 Method* m = methods->at(i); |
0 | 1346 m->set_method_idnum(i); |
1347 } | |
1348 } | |
3779 | 1349 { |
1350 No_Safepoint_Verifier nsv; | |
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1351 QuickSort::sort<Method*>(methods->data(), length, method_comparator, idempotent); |
0 | 1352 } |
1353 | |
1354 // Sort annotations if necessary | |
1355 assert(methods_annotations == NULL || methods_annotations->length() == methods->length(), ""); | |
1356 assert(methods_parameter_annotations == NULL || methods_parameter_annotations->length() == methods->length(), ""); | |
1357 assert(methods_default_annotations == NULL || methods_default_annotations->length() == methods->length(), ""); | |
1358 if (do_annotations) { | |
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1359 ResourceMark rm; |
0 | 1360 // Allocate temporary storage |
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1361 GrowableArray<AnnotationArray*>* temp_array = new GrowableArray<AnnotationArray*>(length); |
0 | 1362 reorder_based_on_method_index(methods, methods_annotations, temp_array); |
1363 reorder_based_on_method_index(methods, methods_parameter_annotations, temp_array); | |
1364 reorder_based_on_method_index(methods, methods_default_annotations, temp_array); | |
1365 } | |
1366 | |
1367 // Reset method ordering | |
1368 for (int i = 0; i < length; i++) { | |
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1369 Method* m = methods->at(i); |
0 | 1370 m->set_method_idnum(i); |
1371 } | |
1372 } | |
1373 } | |
1374 | |
1375 | |
1376 //----------------------------------------------------------------------------------- | |
1377 // Non-product code | |
1378 | |
1379 #ifndef PRODUCT | |
1380 class SignatureTypePrinter : public SignatureTypeNames { | |
1381 private: | |
1382 outputStream* _st; | |
1383 bool _use_separator; | |
1384 | |
1385 void type_name(const char* name) { | |
1386 if (_use_separator) _st->print(", "); | |
1387 _st->print(name); | |
1388 _use_separator = true; | |
1389 } | |
1390 | |
1391 public: | |
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1392 SignatureTypePrinter(Symbol* signature, outputStream* st) : SignatureTypeNames(signature) { |
0 | 1393 _st = st; |
1394 _use_separator = false; | |
1395 } | |
1396 | |
1397 void print_parameters() { _use_separator = false; iterate_parameters(); } | |
1398 void print_returntype() { _use_separator = false; iterate_returntype(); } | |
1399 }; | |
1400 | |
1401 | |
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1402 void Method::print_name(outputStream* st) { |
0 | 1403 Thread *thread = Thread::current(); |
1404 ResourceMark rm(thread); | |
1405 SignatureTypePrinter sig(signature(), st); | |
1406 st->print("%s ", is_static() ? "static" : "virtual"); | |
1407 sig.print_returntype(); | |
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1408 st->print(" %s.", method_holder()->internal_name()); |
0 | 1409 name()->print_symbol_on(st); |
1410 st->print("("); | |
1411 sig.print_parameters(); | |
1412 st->print(")"); | |
1413 } | |
1414 | |
1415 | |
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1416 void Method::print_codes_on(outputStream* st) const { |
0 | 1417 print_codes_on(0, code_size(), st); |
1418 } | |
1419 | |
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1420 void Method::print_codes_on(int from, int to, outputStream* st) const { |
0 | 1421 Thread *thread = Thread::current(); |
1422 ResourceMark rm(thread); | |
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1423 methodHandle mh (thread, (Method*)this); |
0 | 1424 BytecodeStream s(mh); |
1425 s.set_interval(from, to); | |
1426 BytecodeTracer::set_closure(BytecodeTracer::std_closure()); | |
1427 while (s.next() >= 0) BytecodeTracer::trace(mh, s.bcp(), st); | |
1428 } | |
1429 #endif // not PRODUCT | |
1430 | |
1431 | |
1432 // Simple compression of line number tables. We use a regular compressed stream, except that we compress deltas | |
1433 // between (bci,line) pairs since they are smaller. If (bci delta, line delta) fits in (5-bit unsigned, 3-bit unsigned) | |
1434 // we save it as one byte, otherwise we write a 0xFF escape character and use regular compression. 0x0 is used | |
1435 // as end-of-stream terminator. | |
1436 | |
1437 void CompressedLineNumberWriteStream::write_pair_regular(int bci_delta, int line_delta) { | |
1438 // bci and line number does not compress into single byte. | |
1439 // Write out escape character and use regular compression for bci and line number. | |
1440 write_byte((jubyte)0xFF); | |
1441 write_signed_int(bci_delta); | |
1442 write_signed_int(line_delta); | |
1443 } | |
1444 | |
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1445 // See comment in method.hpp which explains why this exists. |
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1446 #if defined(_M_AMD64) && _MSC_VER >= 1400 |
0 | 1447 #pragma optimize("", off) |
1448 void CompressedLineNumberWriteStream::write_pair(int bci, int line) { | |
1449 write_pair_inline(bci, line); | |
1450 } | |
1451 #pragma optimize("", on) | |
1452 #endif | |
1453 | |
1454 CompressedLineNumberReadStream::CompressedLineNumberReadStream(u_char* buffer) : CompressedReadStream(buffer) { | |
1455 _bci = 0; | |
1456 _line = 0; | |
1457 }; | |
1458 | |
1459 | |
1460 bool CompressedLineNumberReadStream::read_pair() { | |
1461 jubyte next = read_byte(); | |
1462 // Check for terminator | |
1463 if (next == 0) return false; | |
1464 if (next == 0xFF) { | |
1465 // Escape character, regular compression used | |
1466 _bci += read_signed_int(); | |
1467 _line += read_signed_int(); | |
1468 } else { | |
1469 // Single byte compression used | |
1470 _bci += next >> 3; | |
1471 _line += next & 0x7; | |
1472 } | |
1473 return true; | |
1474 } | |
1475 | |
1476 | |
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1477 Bytecodes::Code Method::orig_bytecode_at(int bci) const { |
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1478 BreakpointInfo* bp = method_holder()->breakpoints(); |
0 | 1479 for (; bp != NULL; bp = bp->next()) { |
1480 if (bp->match(this, bci)) { | |
1481 return bp->orig_bytecode(); | |
1482 } | |
1483 } | |
1484 ShouldNotReachHere(); | |
1485 return Bytecodes::_shouldnotreachhere; | |
1486 } | |
1487 | |
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1488 void Method::set_orig_bytecode_at(int bci, Bytecodes::Code code) { |
0 | 1489 assert(code != Bytecodes::_breakpoint, "cannot patch breakpoints this way"); |
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1490 BreakpointInfo* bp = method_holder()->breakpoints(); |
0 | 1491 for (; bp != NULL; bp = bp->next()) { |
1492 if (bp->match(this, bci)) { | |
1493 bp->set_orig_bytecode(code); | |
1494 // and continue, in case there is more than one | |
1495 } | |
1496 } | |
1497 } | |
1498 | |
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1499 void Method::set_breakpoint(int bci) { |
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1500 InstanceKlass* ik = method_holder(); |
0 | 1501 BreakpointInfo *bp = new BreakpointInfo(this, bci); |
1502 bp->set_next(ik->breakpoints()); | |
1503 ik->set_breakpoints(bp); | |
1504 // do this last: | |
1505 bp->set(this); | |
1506 } | |
1507 | |
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1508 static void clear_matches(Method* m, int bci) { |
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1509 InstanceKlass* ik = m->method_holder(); |
0 | 1510 BreakpointInfo* prev_bp = NULL; |
1511 BreakpointInfo* next_bp; | |
1512 for (BreakpointInfo* bp = ik->breakpoints(); bp != NULL; bp = next_bp) { | |
1513 next_bp = bp->next(); | |
1514 // bci value of -1 is used to delete all breakpoints in method m (ex: clear_all_breakpoint). | |
1515 if (bci >= 0 ? bp->match(m, bci) : bp->match(m)) { | |
1516 // do this first: | |
1517 bp->clear(m); | |
1518 // unhook it | |
1519 if (prev_bp != NULL) | |
1520 prev_bp->set_next(next_bp); | |
1521 else | |
1522 ik->set_breakpoints(next_bp); | |
1523 delete bp; | |
1524 // When class is redefined JVMTI sets breakpoint in all versions of EMCP methods | |
1525 // at same location. So we have multiple matching (method_index and bci) | |
1526 // BreakpointInfo nodes in BreakpointInfo list. We should just delete one | |
1527 // breakpoint for clear_breakpoint request and keep all other method versions | |
1528 // BreakpointInfo for future clear_breakpoint request. | |
1529 // bcivalue of -1 is used to clear all breakpoints (see clear_all_breakpoints) | |
1530 // which is being called when class is unloaded. We delete all the Breakpoint | |
1531 // information for all versions of method. We may not correctly restore the original | |
1532 // bytecode in all method versions, but that is ok. Because the class is being unloaded | |
1533 // so these methods won't be used anymore. | |
1534 if (bci >= 0) { | |
1535 break; | |
1536 } | |
1537 } else { | |
1538 // This one is a keeper. | |
1539 prev_bp = bp; | |
1540 } | |
1541 } | |
1542 } | |
1543 | |
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1544 void Method::clear_breakpoint(int bci) { |
0 | 1545 assert(bci >= 0, ""); |
1546 clear_matches(this, bci); | |
1547 } | |
1548 | |
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1549 void Method::clear_all_breakpoints() { |
0 | 1550 clear_matches(this, -1); |
1551 } | |
1552 | |
1553 | |
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1554 int Method::invocation_count() { |
1783 | 1555 if (TieredCompilation) { |
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1556 MethodData* const mdo = method_data(); |
1783 | 1557 if (invocation_counter()->carry() || ((mdo != NULL) ? mdo->invocation_counter()->carry() : false)) { |
1558 return InvocationCounter::count_limit; | |
1559 } else { | |
1560 return invocation_counter()->count() + ((mdo != NULL) ? mdo->invocation_counter()->count() : 0); | |
1561 } | |
1562 } else { | |
1563 return invocation_counter()->count(); | |
1564 } | |
1565 } | |
1566 | |
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1567 int Method::backedge_count() { |
1783 | 1568 if (TieredCompilation) { |
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1569 MethodData* const mdo = method_data(); |
1783 | 1570 if (backedge_counter()->carry() || ((mdo != NULL) ? mdo->backedge_counter()->carry() : false)) { |
1571 return InvocationCounter::count_limit; | |
1572 } else { | |
1573 return backedge_counter()->count() + ((mdo != NULL) ? mdo->backedge_counter()->count() : 0); | |
1574 } | |
1575 } else { | |
1576 return backedge_counter()->count(); | |
1577 } | |
1578 } | |
1579 | |
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1580 int Method::highest_comp_level() const { |
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1581 MethodData* mdo = method_data(); |
1783 | 1582 if (mdo != NULL) { |
1583 return mdo->highest_comp_level(); | |
1584 } else { | |
1585 return CompLevel_none; | |
1586 } | |
1587 } | |
1588 | |
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1589 int Method::highest_osr_comp_level() const { |
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1590 MethodData* mdo = method_data(); |
1783 | 1591 if (mdo != NULL) { |
1592 return mdo->highest_osr_comp_level(); | |
1593 } else { | |
1594 return CompLevel_none; | |
1595 } | |
1596 } | |
1597 | |
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1598 void Method::set_highest_comp_level(int level) { |
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1599 MethodData* mdo = method_data(); |
1783 | 1600 if (mdo != NULL) { |
1601 mdo->set_highest_comp_level(level); | |
1602 } | |
1603 } | |
1604 | |
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1605 void Method::set_highest_osr_comp_level(int level) { |
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1606 MethodData* mdo = method_data(); |
1783 | 1607 if (mdo != NULL) { |
1608 mdo->set_highest_osr_comp_level(level); | |
1609 } | |
1610 } | |
1611 | |
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1612 BreakpointInfo::BreakpointInfo(Method* m, int bci) { |
0 | 1613 _bci = bci; |
1614 _name_index = m->name_index(); | |
1615 _signature_index = m->signature_index(); | |
1616 _orig_bytecode = (Bytecodes::Code) *m->bcp_from(_bci); | |
1617 if (_orig_bytecode == Bytecodes::_breakpoint) | |
1618 _orig_bytecode = m->orig_bytecode_at(_bci); | |
1619 _next = NULL; | |
1620 } | |
1621 | |
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1622 void BreakpointInfo::set(Method* method) { |
0 | 1623 #ifdef ASSERT |
1624 { | |
1625 Bytecodes::Code code = (Bytecodes::Code) *method->bcp_from(_bci); | |
1626 if (code == Bytecodes::_breakpoint) | |
1627 code = method->orig_bytecode_at(_bci); | |
1628 assert(orig_bytecode() == code, "original bytecode must be the same"); | |
1629 } | |
1630 #endif | |
1631 *method->bcp_from(_bci) = Bytecodes::_breakpoint; | |
1632 method->incr_number_of_breakpoints(); | |
1633 SystemDictionary::notice_modification(); | |
1634 { | |
1635 // Deoptimize all dependents on this method | |
1636 Thread *thread = Thread::current(); | |
1637 HandleMark hm(thread); | |
1638 methodHandle mh(thread, method); | |
1639 Universe::flush_dependents_on_method(mh); | |
1640 } | |
1641 } | |
1642 | |
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1643 void BreakpointInfo::clear(Method* method) { |
0 | 1644 *method->bcp_from(_bci) = orig_bytecode(); |
1645 assert(method->number_of_breakpoints() > 0, "must not go negative"); | |
1646 method->decr_number_of_breakpoints(); | |
1647 } | |
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1648 |
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1649 // jmethodID handling |
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1650 |
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1651 // This is a block allocating object, sort of like JNIHandleBlock, only a |
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1652 // lot simpler. There aren't many of these, they aren't long, they are rarely |
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1653 // deleted and so we can do some suboptimal things. |
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1654 // It's allocated on the CHeap because once we allocate a jmethodID, we can |
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1655 // never get rid of it. |
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1656 // It would be nice to be able to parameterize the number of methods for |
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1657 // the null_class_loader but then we'd have to turn this and ClassLoaderData |
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1658 // into templates. |
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1659 |
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1660 // I feel like this brain dead class should exist somewhere in the STL |
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1661 |
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1662 class JNIMethodBlock : public CHeapObj<mtClass> { |
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1663 enum { number_of_methods = 8 }; |
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1664 |
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1665 Method* _methods[number_of_methods]; |
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1666 int _top; |
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1667 JNIMethodBlock* _next; |
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1668 public: |
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1669 static Method* const _free_method; |
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1670 |
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1671 JNIMethodBlock() : _next(NULL), _top(0) { |
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1672 for (int i = 0; i< number_of_methods; i++) _methods[i] = _free_method; |
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1673 } |
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1674 |
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1675 Method** add_method(Method* m) { |
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1676 if (_top < number_of_methods) { |
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1677 // top points to the next free entry. |
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1678 int i = _top; |
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1679 _methods[i] = m; |
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1680 _top++; |
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1681 return &_methods[i]; |
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1682 } else if (_top == number_of_methods) { |
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1683 // if the next free entry ran off the block see if there's a free entry |
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1684 for (int i = 0; i< number_of_methods; i++) { |
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1685 if (_methods[i] == _free_method) { |
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1686 _methods[i] = m; |
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1687 return &_methods[i]; |
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1688 } |
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1689 } |
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1690 // Only check each block once for frees. They're very unlikely. |
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1691 // Increment top past the end of the block. |
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1692 _top++; |
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1693 } |
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1694 // need to allocate a next block. |
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1695 if (_next == NULL) { |
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1696 _next = new JNIMethodBlock(); |
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1697 } |
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1698 return _next->add_method(m); |
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1699 } |
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1700 |
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1701 bool contains(Method** m) { |
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1702 for (JNIMethodBlock* b = this; b != NULL; b = b->_next) { |
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1703 for (int i = 0; i< number_of_methods; i++) { |
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1704 if (&(b->_methods[i]) == m) { |
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1705 return true; |
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1706 } |
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1707 } |
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1708 } |
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1709 return false; // not found |
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1710 } |
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1711 |
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1712 // Doesn't really destroy it, just marks it as free so it can be reused. |
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1713 void destroy_method(Method** m) { |
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1714 #ifdef ASSERT |
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1715 assert(contains(m), "should be a methodID"); |
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1716 #endif // ASSERT |
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1717 *m = _free_method; |
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1718 } |
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1719 |
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1720 // During class unloading the methods are cleared, which is different |
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1721 // than freed. |
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1722 void clear_all_methods() { |
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1723 for (JNIMethodBlock* b = this; b != NULL; b = b->_next) { |
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1724 for (int i = 0; i< number_of_methods; i++) { |
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1725 _methods[i] = NULL; |
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1726 } |
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1727 } |
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1728 } |
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1729 #ifndef PRODUCT |
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1730 int count_methods() { |
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1731 // count all allocated methods |
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1732 int count = 0; |
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1733 for (JNIMethodBlock* b = this; b != NULL; b = b->_next) { |
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1734 for (int i = 0; i< number_of_methods; i++) { |
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1735 if (_methods[i] != _free_method) count++; |
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1736 } |
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1737 } |
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1738 return count; |
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1739 } |
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1740 #endif // PRODUCT |
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1741 }; |
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1742 |
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1743 // Something that can't be mistaken for an address or a markOop |
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1744 Method* const JNIMethodBlock::_free_method = (Method*)55; |
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1745 |
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1746 // Add a method id to the jmethod_ids |
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1747 jmethodID Method::make_jmethod_id(ClassLoaderData* loader_data, Method* m) { |
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1748 ClassLoaderData* cld = loader_data; |
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1749 |
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1750 if (!SafepointSynchronize::is_at_safepoint()) { |
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1751 // Have to add jmethod_ids() to class loader data thread-safely. |
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1752 // Also have to add the method to the list safely, which the cld lock |
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1753 // protects as well. |
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1754 MutexLockerEx ml(cld->metaspace_lock(), Mutex::_no_safepoint_check_flag); |
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1755 if (cld->jmethod_ids() == NULL) { |
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1756 cld->set_jmethod_ids(new JNIMethodBlock()); |
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1757 } |
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1758 // jmethodID is a pointer to Method* |
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1759 return (jmethodID)cld->jmethod_ids()->add_method(m); |
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1760 } else { |
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1761 // At safepoint, we are single threaded and can set this. |
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1762 if (cld->jmethod_ids() == NULL) { |
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1763 cld->set_jmethod_ids(new JNIMethodBlock()); |
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1764 } |
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1765 // jmethodID is a pointer to Method* |
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1766 return (jmethodID)cld->jmethod_ids()->add_method(m); |
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1767 } |
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1768 } |
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1769 |
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1770 // Mark a jmethodID as free. This is called when there is a data race in |
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1771 // InstanceKlass while creating the jmethodID cache. |
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1772 void Method::destroy_jmethod_id(ClassLoaderData* loader_data, jmethodID m) { |
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1773 ClassLoaderData* cld = loader_data; |
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1774 Method** ptr = (Method**)m; |
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1775 assert(cld->jmethod_ids() != NULL, "should have method handles"); |
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1776 cld->jmethod_ids()->destroy_method(ptr); |
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1777 } |
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1778 |
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1779 void Method::change_method_associated_with_jmethod_id(jmethodID jmid, Method* new_method) { |
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1780 // Can't assert the method_holder is the same because the new method has the |
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1781 // scratch method holder. |
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1782 assert(resolve_jmethod_id(jmid)->method_holder()->class_loader() |
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1783 == new_method->method_holder()->class_loader(), |
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1784 "changing to a different class loader"); |
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1785 // Just change the method in place, jmethodID pointer doesn't change. |
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1786 *((Method**)jmid) = new_method; |
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1787 } |
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1788 |
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1789 bool Method::is_method_id(jmethodID mid) { |
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1790 Method* m = resolve_jmethod_id(mid); |
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1791 assert(m != NULL, "should be called with non-null method"); |
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1792 InstanceKlass* ik = m->method_holder(); |
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1793 ClassLoaderData* cld = ik->class_loader_data(); |
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1794 if (cld->jmethod_ids() == NULL) return false; |
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1795 return (cld->jmethod_ids()->contains((Method**)mid)); |
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1796 } |
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1797 |
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1798 Method* Method::checked_resolve_jmethod_id(jmethodID mid) { |
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1799 if (mid == NULL) return NULL; |
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1800 Method* o = resolve_jmethod_id(mid); |
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1801 if (o == NULL || o == JNIMethodBlock::_free_method || !((Metadata*)o)->is_method()) { |
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1802 return NULL; |
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1803 } |
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1804 return o; |
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1805 }; |
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1806 |
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1807 void Method::set_on_stack(const bool value) { |
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1808 // Set both the method itself and its constant pool. The constant pool |
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1809 // on stack means some method referring to it is also on the stack. |
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1810 _access_flags.set_on_stack(value); |
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1811 constants()->set_on_stack(value); |
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1812 if (value) MetadataOnStackMark::record(this); |
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1813 } |
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1814 |
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1815 // Called when the class loader is unloaded to make all methods weak. |
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1816 void Method::clear_jmethod_ids(ClassLoaderData* loader_data) { |
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1817 loader_data->jmethod_ids()->clear_all_methods(); |
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1818 } |
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1819 |
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1820 #ifndef PRODUCT |
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1821 void Method::print_jmethod_ids(ClassLoaderData* loader_data, outputStream* out) { |
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1822 out->print_cr("jni_method_id count = %d", loader_data->jmethod_ids()->count_methods()); |
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1823 } |
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1824 #endif // PRODUCT |
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1825 |
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1826 |
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1827 // Printing |
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1828 |
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1829 #ifndef PRODUCT |
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1830 |
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1831 void Method::print_on(outputStream* st) const { |
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1832 ResourceMark rm; |
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1833 assert(is_method(), "must be method"); |
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1834 st->print_cr(internal_name()); |
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1835 // get the effect of PrintOopAddress, always, for methods: |
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1836 st->print_cr(" - this oop: "INTPTR_FORMAT, (intptr_t)this); |
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1837 st->print (" - method holder: "); method_holder()->print_value_on(st); st->cr(); |
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1838 st->print (" - constants: "INTPTR_FORMAT" ", (address)constants()); |
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1839 constants()->print_value_on(st); st->cr(); |
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1840 st->print (" - access: 0x%x ", access_flags().as_int()); access_flags().print_on(st); st->cr(); |
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1841 st->print (" - name: "); name()->print_value_on(st); st->cr(); |
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1842 st->print (" - signature: "); signature()->print_value_on(st); st->cr(); |
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1843 st->print_cr(" - max stack: %d", max_stack()); |
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1844 st->print_cr(" - max locals: %d", max_locals()); |
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1845 st->print_cr(" - size of params: %d", size_of_parameters()); |
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1846 st->print_cr(" - method size: %d", method_size()); |
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1847 if (intrinsic_id() != vmIntrinsics::_none) |
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1848 st->print_cr(" - intrinsic id: %d %s", intrinsic_id(), vmIntrinsics::name_at(intrinsic_id())); |
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1849 if (highest_comp_level() != CompLevel_none) |
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1850 st->print_cr(" - highest level: %d", highest_comp_level()); |
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1851 st->print_cr(" - vtable index: %d", _vtable_index); |
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1852 st->print_cr(" - i2i entry: " INTPTR_FORMAT, interpreter_entry()); |
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1853 st->print( " - adapters: "); |
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1854 AdapterHandlerEntry* a = ((Method*)this)->adapter(); |
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1855 if (a == NULL) |
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1856 st->print_cr(INTPTR_FORMAT, a); |
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1857 else |
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1858 a->print_adapter_on(st); |
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1859 st->print_cr(" - compiled entry " INTPTR_FORMAT, from_compiled_entry()); |
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1860 st->print_cr(" - code size: %d", code_size()); |
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1861 if (code_size() != 0) { |
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1862 st->print_cr(" - code start: " INTPTR_FORMAT, code_base()); |
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1863 st->print_cr(" - code end (excl): " INTPTR_FORMAT, code_base() + code_size()); |
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1864 } |
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1865 if (method_data() != NULL) { |
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1866 st->print_cr(" - method data: " INTPTR_FORMAT, (address)method_data()); |
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1867 } |
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1868 st->print_cr(" - checked ex length: %d", checked_exceptions_length()); |
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1869 if (checked_exceptions_length() > 0) { |
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1870 CheckedExceptionElement* table = checked_exceptions_start(); |
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1871 st->print_cr(" - checked ex start: " INTPTR_FORMAT, table); |
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1872 if (Verbose) { |
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1873 for (int i = 0; i < checked_exceptions_length(); i++) { |
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1874 st->print_cr(" - throws %s", constants()->printable_name_at(table[i].class_cp_index)); |
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1875 } |
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1876 } |
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1877 } |
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1878 if (has_linenumber_table()) { |
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1879 u_char* table = compressed_linenumber_table(); |
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1880 st->print_cr(" - linenumber start: " INTPTR_FORMAT, table); |
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1881 if (Verbose) { |
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1882 CompressedLineNumberReadStream stream(table); |
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1883 while (stream.read_pair()) { |
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1884 st->print_cr(" - line %d: %d", stream.line(), stream.bci()); |
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1885 } |
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1886 } |
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1887 } |
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1888 st->print_cr(" - localvar length: %d", localvariable_table_length()); |
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1889 if (localvariable_table_length() > 0) { |
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1890 LocalVariableTableElement* table = localvariable_table_start(); |
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1891 st->print_cr(" - localvar start: " INTPTR_FORMAT, table); |
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1892 if (Verbose) { |
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1893 for (int i = 0; i < localvariable_table_length(); i++) { |
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1894 int bci = table[i].start_bci; |
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1895 int len = table[i].length; |
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1896 const char* name = constants()->printable_name_at(table[i].name_cp_index); |
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1897 const char* desc = constants()->printable_name_at(table[i].descriptor_cp_index); |
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1898 int slot = table[i].slot; |
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1899 st->print_cr(" - %s %s bci=%d len=%d slot=%d", desc, name, bci, len, slot); |
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1900 } |
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1901 } |
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1902 } |
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1903 if (code() != NULL) { |
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1904 st->print (" - compiled code: "); |
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1905 code()->print_value_on(st); |
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1906 } |
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1907 if (is_native()) { |
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1908 st->print_cr(" - native function: " INTPTR_FORMAT, native_function()); |
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1909 st->print_cr(" - signature handler: " INTPTR_FORMAT, signature_handler()); |
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1910 } |
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1911 } |
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1912 |
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1913 #endif //PRODUCT |
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1914 |
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1915 void Method::print_value_on(outputStream* st) const { |
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1916 assert(is_method(), "must be method"); |
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1917 st->print_cr(internal_name()); |
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1918 print_address_on(st); |
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1919 st->print(" "); |
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1920 name()->print_value_on(st); |
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1921 st->print(" "); |
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1922 signature()->print_value_on(st); |
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1923 st->print(" in "); |
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1924 method_holder()->print_value_on(st); |
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1925 if (WizardMode) st->print("[%d,%d]", size_of_parameters(), max_locals()); |
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1926 if (WizardMode && code() != NULL) st->print(" ((nmethod*)%p)", code()); |
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1927 } |
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1928 |
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1929 |
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1930 // Verification |
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1931 |
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1932 void Method::verify_on(outputStream* st) { |
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1933 guarantee(is_method(), "object must be method"); |
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1934 guarantee(is_metadata(), "should be metadata"); |
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1935 guarantee(constants()->is_constantPool(), "should be constant pool"); |
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1936 guarantee(constants()->is_metadata(), "should be metadata"); |
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1937 guarantee(constMethod()->is_constMethod(), "should be ConstMethod*"); |
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1938 guarantee(constMethod()->is_metadata(), "should be metadata"); |
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1939 MethodData* md = method_data(); |
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1940 guarantee(md == NULL || |
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1941 md->is_metadata(), "should be in permspace"); |
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1942 guarantee(md == NULL || |
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1943 md->is_methodData(), "should be method data"); |
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1944 } |