Mercurial > hg > truffle
annotate src/share/vm/oops/method.hpp @ 8827:42e370795a39
8010818: NPG: Remove metaspace memory pools
Reviewed-by: mgerdin, stefank
author | ehelin |
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date | Wed, 27 Mar 2013 10:55:37 +0100 |
parents | 56c364daccc3 |
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0 | 1 /* |
7956 | 2 * Copyright (c) 1997, 2013, 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 #ifndef SHARE_VM_OOPS_METHODOOP_HPP |
26 #define SHARE_VM_OOPS_METHODOOP_HPP | |
27 | |
28 #include "classfile/vmSymbols.hpp" | |
29 #include "code/compressedStream.hpp" | |
30 #include "compiler/oopMap.hpp" | |
31 #include "interpreter/invocationCounter.hpp" | |
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32 #include "oops/annotations.hpp" |
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33 #include "oops/constantPool.hpp" |
1972 | 34 #include "oops/instanceKlass.hpp" |
35 #include "oops/oop.hpp" | |
36 #include "oops/typeArrayOop.hpp" | |
37 #include "utilities/accessFlags.hpp" | |
38 #include "utilities/growableArray.hpp" | |
39 | |
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40 // A Method* represents a Java method. |
0 | 41 // |
42 // Memory layout (each line represents a word). Note that most applications load thousands of methods, | |
43 // so keeping the size of this structure small has a big impact on footprint. | |
44 // | |
45 // We put all oops and method_size first for better gc cache locality. | |
46 // | |
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47 // The actual bytecodes are inlined after the end of the Method struct. |
0 | 48 // |
49 // There are bits in the access_flags telling whether inlined tables are present. | |
50 // Note that accessing the line number and local variable tables is not performance critical at all. | |
51 // Accessing the checked exceptions table is used by reflection, so we put that last to make access | |
52 // to it fast. | |
53 // | |
54 // The line number table is compressed and inlined following the byte codes. It is found as the first | |
55 // byte following the byte codes. The checked exceptions table and the local variable table are inlined | |
56 // after the line number table, and indexed from the end of the method. We do not compress the checked | |
57 // exceptions table since the average length is less than 2, and do not bother to compress the local | |
58 // variable table either since it is mostly absent. | |
59 // | |
60 // Note that native_function and signature_handler has to be at fixed offsets (required by the interpreter) | |
61 // | |
62 // |------------------------------------------------------| | |
63 // | header | | |
64 // | klass | | |
65 // |------------------------------------------------------| | |
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66 // | ConstMethod* (oop) | |
0 | 67 // |------------------------------------------------------| |
68 // | methodData (oop) | | |
69 // | interp_invocation_count | | |
70 // |------------------------------------------------------| | |
71 // | access_flags | | |
72 // | vtable_index | | |
73 // |------------------------------------------------------| | |
74 // | result_index (C++ interpreter only) | | |
75 // |------------------------------------------------------| | |
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76 // | method_size | intrinsic_id| flags | |
0 | 77 // |------------------------------------------------------| |
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78 // | throwout_count | num_breakpoints | |
0 | 79 // |------------------------------------------------------| |
80 // | invocation_counter | | |
81 // | backedge_counter | | |
82 // |------------------------------------------------------| | |
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83 // | prev_time (tiered only, 64 bit wide) | |
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84 // | | |
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85 // |------------------------------------------------------| |
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86 // | rate (tiered) | |
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87 // |------------------------------------------------------| |
0 | 88 // | code (pointer) | |
89 // | i2i (pointer) | | |
90 // | adapter (pointer) | | |
91 // | from_compiled_entry (pointer) | | |
92 // | from_interpreted_entry (pointer) | | |
93 // |------------------------------------------------------| | |
94 // | native_function (present only if native) | | |
95 // | signature_handler (present only if native) | | |
96 // |------------------------------------------------------| | |
97 | |
98 | |
99 class CheckedExceptionElement; | |
100 class LocalVariableTableElement; | |
101 class AdapterHandlerEntry; | |
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102 class MethodData; |
6934 | 103 class ConstMethod; |
8031 | 104 class InlineTableSizes; |
7956 | 105 class KlassSizeStats; |
0 | 106 |
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107 class Method : public Metadata { |
0 | 108 friend class VMStructs; |
109 private: | |
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110 ConstMethod* _constMethod; // Method read-only data. |
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111 MethodData* _method_data; |
1783 | 112 int _interpreter_invocation_count; // Count of times invoked (reused as prev_event_count in tiered) |
0 | 113 AccessFlags _access_flags; // Access flags |
114 int _vtable_index; // vtable index of this method (see VtableIndexFlag) | |
115 // note: can have vtables with >2**16 elements (because of inheritance) | |
116 #ifdef CC_INTERP | |
117 int _result_index; // C++ interpreter needs for converting results to/from stack | |
118 #endif | |
119 u2 _method_size; // size of this object | |
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120 u1 _intrinsic_id; // vmSymbols::intrinsic_id (0 == _none) |
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121 u1 _jfr_towrite : 1, // Flags |
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122 _force_inline : 1, |
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123 _hidden : 1, |
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124 _dont_inline : 1, |
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125 : 4; |
0 | 126 u2 _interpreter_throwout_count; // Count of times method was exited via exception while interpreting |
127 u2 _number_of_breakpoints; // fullspeed debugging support | |
128 InvocationCounter _invocation_counter; // Incremented before each activation of the method - used to trigger frequency-based optimizations | |
129 InvocationCounter _backedge_counter; // Incremented before each backedge taken - used to trigger frequencey-based optimizations | |
1783 | 130 |
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131 #ifdef TIERED |
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132 float _rate; // Events (invocation and backedge counter increments) per millisecond |
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133 jlong _prev_time; // Previous time the rate was acquired |
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134 #endif |
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135 |
0 | 136 #ifndef PRODUCT |
137 int _compiled_invocation_count; // Number of nmethod invocations so far (for perf. debugging) | |
138 #endif | |
139 // Entry point for calling both from and to the interpreter. | |
140 address _i2i_entry; // All-args-on-stack calling convention | |
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141 // Adapter blob (i2c/c2i) for this Method*. Set once when method is linked. |
0 | 142 AdapterHandlerEntry* _adapter; |
143 // Entry point for calling from compiled code, to compiled code if it exists | |
144 // or else the interpreter. | |
145 volatile address _from_compiled_entry; // Cache of: _code ? _code->entry_point() : _adapter->c2i_entry() | |
146 // The entry point for calling both from and to compiled code is | |
147 // "_code->entry_point()". Because of tiered compilation and de-opt, this | |
148 // field can come and go. It can transition from NULL to not-null at any | |
149 // time (whenever a compile completes). It can transition from not-null to | |
150 // NULL only at safepoints (because of a de-opt). | |
151 nmethod* volatile _code; // Points to the corresponding piece of native code | |
152 volatile address _from_interpreted_entry; // Cache of _code ? _adapter->i2c_entry() : _i2i_entry | |
153 | |
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154 // Constructor |
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155 Method(ConstMethod* xconst, AccessFlags access_flags, int size); |
0 | 156 public: |
6934 | 157 |
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158 static Method* allocate(ClassLoaderData* loader_data, |
6934 | 159 int byte_code_size, |
160 AccessFlags access_flags, | |
8031 | 161 InlineTableSizes* sizes, |
6934 | 162 ConstMethod::MethodType method_type, |
163 TRAPS); | |
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164 |
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165 // CDS and vtbl checking can create an empty Method to get vtbl pointer. |
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166 Method(){} |
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167 |
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168 // The Method vtable is restored by this call when the Method is in the |
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169 // shared archive. See patch_klass_vtables() in metaspaceShared.cpp for |
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170 // all the gory details. SA, dtrace and pstack helpers distinguish metadata |
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171 // by their vtable. |
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172 void restore_vtable() { guarantee(is_method(), "vtable restored by this call"); } |
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173 bool is_method() const volatile { return true; } |
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174 |
0 | 175 // accessors for instance variables |
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176 |
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177 ConstMethod* constMethod() const { return _constMethod; } |
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178 void set_constMethod(ConstMethod* xconst) { _constMethod = xconst; } |
0 | 179 |
180 | |
181 static address make_adapters(methodHandle mh, TRAPS); | |
182 volatile address from_compiled_entry() const { return (address)OrderAccess::load_ptr_acquire(&_from_compiled_entry); } | |
183 volatile address from_interpreted_entry() const{ return (address)OrderAccess::load_ptr_acquire(&_from_interpreted_entry); } | |
184 | |
185 // access flag | |
186 AccessFlags access_flags() const { return _access_flags; } | |
187 void set_access_flags(AccessFlags flags) { _access_flags = flags; } | |
188 | |
189 // name | |
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190 Symbol* name() const { return constants()->symbol_at(name_index()); } |
0 | 191 int name_index() const { return constMethod()->name_index(); } |
192 void set_name_index(int index) { constMethod()->set_name_index(index); } | |
193 | |
194 // signature | |
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195 Symbol* signature() const { return constants()->symbol_at(signature_index()); } |
0 | 196 int signature_index() const { return constMethod()->signature_index(); } |
197 void set_signature_index(int index) { constMethod()->set_signature_index(index); } | |
198 | |
199 // generics support | |
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200 Symbol* generic_signature() const { int idx = generic_signature_index(); return ((idx != 0) ? constants()->symbol_at(idx) : (Symbol*)NULL); } |
0 | 201 int generic_signature_index() const { return constMethod()->generic_signature_index(); } |
202 void set_generic_signature_index(int index) { constMethod()->set_generic_signature_index(index); } | |
203 | |
204 // annotations support | |
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205 AnnotationArray* annotations() const { |
8031 | 206 return constMethod()->method_annotations(); |
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207 } |
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208 AnnotationArray* parameter_annotations() const { |
8031 | 209 return constMethod()->parameter_annotations(); |
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210 } |
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211 AnnotationArray* annotation_default() const { |
8031 | 212 return constMethod()->default_annotations(); |
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213 } |
8031 | 214 AnnotationArray* type_annotations() const { |
215 return constMethod()->type_annotations(); | |
216 } | |
0 | 217 |
218 #ifdef CC_INTERP | |
219 void set_result_index(BasicType type); | |
220 int result_index() { return _result_index; } | |
221 #endif | |
222 | |
223 // Helper routine: get klass name + "." + method name + signature as | |
224 // C string, for the purpose of providing more useful NoSuchMethodErrors | |
225 // and fatal error handling. The string is allocated in resource | |
226 // area if a buffer is not provided by the caller. | |
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227 char* name_and_sig_as_C_string() const; |
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228 char* name_and_sig_as_C_string(char* buf, int size) const; |
0 | 229 |
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230 // Static routine in the situations we don't have a Method* |
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231 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature); |
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232 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size); |
0 | 233 |
2142 | 234 Bytecodes::Code java_code_at(int bci) const { |
235 return Bytecodes::java_code_at(this, bcp_from(bci)); | |
236 } | |
237 Bytecodes::Code code_at(int bci) const { | |
238 return Bytecodes::code_at(this, bcp_from(bci)); | |
239 } | |
240 | |
0 | 241 // JVMTI breakpoints |
2142 | 242 Bytecodes::Code orig_bytecode_at(int bci) const; |
0 | 243 void set_orig_bytecode_at(int bci, Bytecodes::Code code); |
244 void set_breakpoint(int bci); | |
245 void clear_breakpoint(int bci); | |
246 void clear_all_breakpoints(); | |
247 // Tracking number of breakpoints, for fullspeed debugging. | |
248 // Only mutated by VM thread. | |
249 u2 number_of_breakpoints() const { return _number_of_breakpoints; } | |
250 void incr_number_of_breakpoints() { ++_number_of_breakpoints; } | |
251 void decr_number_of_breakpoints() { --_number_of_breakpoints; } | |
252 // Initialization only | |
253 void clear_number_of_breakpoints() { _number_of_breakpoints = 0; } | |
254 | |
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255 // index into InstanceKlass methods() array |
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256 // note: also used by jfr |
0 | 257 u2 method_idnum() const { return constMethod()->method_idnum(); } |
258 void set_method_idnum(u2 idnum) { constMethod()->set_method_idnum(idnum); } | |
259 | |
260 // code size | |
261 int code_size() const { return constMethod()->code_size(); } | |
262 | |
263 // method size | |
264 int method_size() const { return _method_size; } | |
265 void set_method_size(int size) { | |
266 assert(0 <= size && size < (1 << 16), "invalid method size"); | |
267 _method_size = size; | |
268 } | |
269 | |
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270 // constant pool for Klass* holding this method |
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271 ConstantPool* constants() const { return constMethod()->constants(); } |
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272 void set_constants(ConstantPool* c) { constMethod()->set_constants(c); } |
0 | 273 |
274 // max stack | |
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275 // return original max stack size for method verification |
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276 int verifier_max_stack() const { return constMethod()->max_stack(); } |
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277 int max_stack() const { return constMethod()->max_stack() + extra_stack_entries(); } |
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278 void set_max_stack(int size) { constMethod()->set_max_stack(size); } |
0 | 279 |
280 // max locals | |
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281 int max_locals() const { return constMethod()->max_locals(); } |
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282 void set_max_locals(int size) { constMethod()->set_max_locals(size); } |
1783 | 283 |
284 int highest_comp_level() const; | |
285 void set_highest_comp_level(int level); | |
286 int highest_osr_comp_level() const; | |
287 void set_highest_osr_comp_level(int level); | |
0 | 288 |
289 // Count of times method was exited via exception while interpreting | |
290 void interpreter_throwout_increment() { | |
291 if (_interpreter_throwout_count < 65534) { | |
292 _interpreter_throwout_count++; | |
293 } | |
294 } | |
295 | |
296 int interpreter_throwout_count() const { return _interpreter_throwout_count; } | |
297 void set_interpreter_throwout_count(int count) { _interpreter_throwout_count = count; } | |
298 | |
299 // size of parameters | |
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300 int size_of_parameters() const { return constMethod()->size_of_parameters(); } |
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301 void set_size_of_parameters(int size) { constMethod()->set_size_of_parameters(size); } |
0 | 302 |
303 bool has_stackmap_table() const { | |
304 return constMethod()->has_stackmap_table(); | |
305 } | |
306 | |
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307 Array<u1>* stackmap_data() const { |
0 | 308 return constMethod()->stackmap_data(); |
309 } | |
310 | |
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311 void set_stackmap_data(Array<u1>* sd) { |
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312 constMethod()->set_stackmap_data(sd); |
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313 } |
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314 |
0 | 315 // exception handler table |
316 bool has_exception_handler() const | |
317 { return constMethod()->has_exception_handler(); } | |
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318 int exception_table_length() const |
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319 { return constMethod()->exception_table_length(); } |
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320 ExceptionTableElement* exception_table_start() const |
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321 { return constMethod()->exception_table_start(); } |
0 | 322 |
323 // Finds the first entry point bci of an exception handler for an | |
324 // exception of klass ex_klass thrown at throw_bci. A value of NULL | |
325 // for ex_klass indicates that the exception klass is not known; in | |
326 // this case it matches any constraint class. Returns -1 if the | |
327 // exception cannot be handled in this method. The handler | |
328 // constraint classes are loaded if necessary. Note that this may | |
329 // throw an exception if loading of the constraint classes causes | |
330 // an IllegalAccessError (bugid 4307310) or an OutOfMemoryError. | |
331 // If an exception is thrown, returns the bci of the | |
332 // exception handler which caused the exception to be thrown, which | |
333 // is needed for proper retries. See, for example, | |
334 // InterpreterRuntime::exception_handler_for_exception. | |
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335 static int fast_exception_handler_bci_for(methodHandle mh, KlassHandle ex_klass, int throw_bci, TRAPS); |
0 | 336 |
337 // method data access | |
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338 MethodData* method_data() const { |
0 | 339 return _method_data; |
340 } | |
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341 void set_method_data(MethodData* data) { |
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342 _method_data = data; |
0 | 343 } |
344 | |
345 // invocation counter | |
1783 | 346 InvocationCounter* invocation_counter() { return &_invocation_counter; } |
347 InvocationCounter* backedge_counter() { return &_backedge_counter; } | |
348 | |
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349 #ifdef TIERED |
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350 // We are reusing interpreter_invocation_count as a holder for the previous event count! |
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351 // We can do that since interpreter_invocation_count is not used in tiered. |
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352 int prev_event_count() const { return _interpreter_invocation_count; } |
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353 void set_prev_event_count(int count) { _interpreter_invocation_count = count; } |
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354 jlong prev_time() const { return _prev_time; } |
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355 void set_prev_time(jlong time) { _prev_time = time; } |
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356 float rate() const { return _rate; } |
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357 void set_rate(float rate) { _rate = rate; } |
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358 #endif |
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359 |
1783 | 360 int invocation_count(); |
361 int backedge_count(); | |
362 | |
363 bool was_executed_more_than(int n); | |
364 bool was_never_executed() { return !was_executed_more_than(0); } | |
0 | 365 |
366 static void build_interpreter_method_data(methodHandle method, TRAPS); | |
367 | |
1783 | 368 int interpreter_invocation_count() { |
369 if (TieredCompilation) return invocation_count(); | |
370 else return _interpreter_invocation_count; | |
371 } | |
0 | 372 void set_interpreter_invocation_count(int count) { _interpreter_invocation_count = count; } |
1783 | 373 int increment_interpreter_invocation_count() { |
374 if (TieredCompilation) ShouldNotReachHere(); | |
375 return ++_interpreter_invocation_count; | |
376 } | |
0 | 377 |
378 #ifndef PRODUCT | |
1783 | 379 int compiled_invocation_count() const { return _compiled_invocation_count; } |
0 | 380 void set_compiled_invocation_count(int count) { _compiled_invocation_count = count; } |
381 #endif // not PRODUCT | |
382 | |
605 | 383 // Clear (non-shared space) pointers which could not be relevant |
0 | 384 // if this (shared) method were mapped into another JVM. |
385 void remove_unshareable_info(); | |
386 | |
387 // nmethod/verified compiler entry | |
388 address verified_code_entry(); | |
389 bool check_code() const; // Not inline to avoid circular ref | |
390 nmethod* volatile code() const { assert( check_code(), "" ); return (nmethod *)OrderAccess::load_ptr_acquire(&_code); } | |
391 void clear_code(); // Clear out any compiled code | |
1202 | 392 static void set_code(methodHandle mh, nmethod* code); |
0 | 393 void set_adapter_entry(AdapterHandlerEntry* adapter) { _adapter = adapter; } |
394 address get_i2c_entry(); | |
395 address get_c2i_entry(); | |
396 address get_c2i_unverified_entry(); | |
397 AdapterHandlerEntry* adapter() { return _adapter; } | |
398 // setup entry points | |
399 void link_method(methodHandle method, TRAPS); | |
400 // clear entry points. Used by sharing code | |
401 void unlink_method(); | |
402 | |
403 // vtable index | |
404 enum VtableIndexFlag { | |
405 // Valid vtable indexes are non-negative (>= 0). | |
406 // These few negative values are used as sentinels. | |
710 | 407 highest_unused_vtable_index_value = -5, |
0 | 408 invalid_vtable_index = -4, // distinct from any valid vtable index |
409 garbage_vtable_index = -3, // not yet linked; no vtable layout yet | |
410 nonvirtual_vtable_index = -2 // there is no need for vtable dispatch | |
411 // 6330203 Note: Do not use -1, which was overloaded with many meanings. | |
412 }; | |
413 DEBUG_ONLY(bool valid_vtable_index() const { return _vtable_index >= nonvirtual_vtable_index; }) | |
414 int vtable_index() const { assert(valid_vtable_index(), ""); | |
415 return _vtable_index; } | |
416 void set_vtable_index(int index) { _vtable_index = index; } | |
417 | |
418 // interpreter entry | |
419 address interpreter_entry() const { return _i2i_entry; } | |
420 // Only used when first initialize so we can set _i2i_entry and _from_interpreted_entry | |
421 void set_interpreter_entry(address entry) { _i2i_entry = entry; _from_interpreted_entry = entry; } | |
422 | |
423 // native function (used for native methods only) | |
424 enum { | |
425 native_bind_event_is_interesting = true | |
426 }; | |
427 address native_function() const { return *(native_function_addr()); } | |
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428 address critical_native_function(); |
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429 |
0 | 430 // Must specify a real function (not NULL). |
431 // Use clear_native_function() to unregister. | |
432 void set_native_function(address function, bool post_event_flag); | |
433 bool has_native_function() const; | |
434 void clear_native_function(); | |
435 | |
436 // signature handler (used for native methods only) | |
437 address signature_handler() const { return *(signature_handler_addr()); } | |
438 void set_signature_handler(address handler); | |
439 | |
440 // Interpreter oopmap support | |
441 void mask_for(int bci, InterpreterOopMap* mask); | |
442 | |
443 #ifndef PRODUCT | |
444 // operations on invocation counter | |
1783 | 445 void print_invocation_count(); |
0 | 446 #endif |
447 | |
448 // byte codes | |
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449 void set_code(address code) { return constMethod()->set_code(code); } |
0 | 450 address code_base() const { return constMethod()->code_base(); } |
451 bool contains(address bcp) const { return constMethod()->contains(bcp); } | |
452 | |
453 // prints byte codes | |
454 void print_codes() const { print_codes_on(tty); } | |
455 void print_codes_on(outputStream* st) const PRODUCT_RETURN; | |
456 void print_codes_on(int from, int to, outputStream* st) const PRODUCT_RETURN; | |
457 | |
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458 // method parameters |
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459 bool has_method_parameters() const |
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460 { return constMethod()->has_method_parameters(); } |
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461 int method_parameters_length() const |
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462 { return constMethod()->method_parameters_length(); } |
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463 MethodParametersElement* method_parameters_start() const |
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464 { return constMethod()->method_parameters_start(); } |
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465 |
0 | 466 // checked exceptions |
467 int checked_exceptions_length() const | |
468 { return constMethod()->checked_exceptions_length(); } | |
469 CheckedExceptionElement* checked_exceptions_start() const | |
470 { return constMethod()->checked_exceptions_start(); } | |
471 | |
472 // localvariable table | |
473 bool has_localvariable_table() const | |
474 { return constMethod()->has_localvariable_table(); } | |
475 int localvariable_table_length() const | |
476 { return constMethod()->localvariable_table_length(); } | |
477 LocalVariableTableElement* localvariable_table_start() const | |
478 { return constMethod()->localvariable_table_start(); } | |
479 | |
480 bool has_linenumber_table() const | |
481 { return constMethod()->has_linenumber_table(); } | |
482 u_char* compressed_linenumber_table() const | |
483 { return constMethod()->compressed_linenumber_table(); } | |
484 | |
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485 // method holder (the Klass* holding this method) |
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486 InstanceKlass* method_holder() const { return constants()->pool_holder(); } |
0 | 487 |
488 void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments) | |
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489 Symbol* klass_name() const; // returns the name of the method holder |
0 | 490 BasicType result_type() const; // type of the method result |
491 int result_type_index() const; // type index of the method result | |
492 bool is_returning_oop() const { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); } | |
493 bool is_returning_fp() const { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); } | |
494 | |
495 // Checked exceptions thrown by this method (resolved to mirrors) | |
496 objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); } | |
497 | |
498 // Access flags | |
499 bool is_public() const { return access_flags().is_public(); } | |
500 bool is_private() const { return access_flags().is_private(); } | |
501 bool is_protected() const { return access_flags().is_protected(); } | |
502 bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); } | |
503 bool is_static() const { return access_flags().is_static(); } | |
504 bool is_final() const { return access_flags().is_final(); } | |
505 bool is_synchronized() const { return access_flags().is_synchronized();} | |
506 bool is_native() const { return access_flags().is_native(); } | |
507 bool is_abstract() const { return access_flags().is_abstract(); } | |
508 bool is_strict() const { return access_flags().is_strict(); } | |
509 bool is_synthetic() const { return access_flags().is_synthetic(); } | |
510 | |
511 // returns true if contains only return operation | |
512 bool is_empty_method() const; | |
513 | |
514 // returns true if this is a vanilla constructor | |
515 bool is_vanilla_constructor() const; | |
516 | |
517 // checks method and its method holder | |
518 bool is_final_method() const; | |
519 bool is_strict_method() const; | |
520 | |
521 // true if method needs no dynamic dispatch (final and/or no vtable entry) | |
522 bool can_be_statically_bound() const; | |
523 | |
524 // returns true if the method has any backward branches. | |
525 bool has_loops() { | |
526 return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag(); | |
527 }; | |
528 | |
529 bool compute_has_loops_flag(); | |
530 | |
531 bool has_jsrs() { | |
532 return access_flags().has_jsrs(); | |
533 }; | |
534 void set_has_jsrs() { | |
535 _access_flags.set_has_jsrs(); | |
536 } | |
537 | |
538 // returns true if the method has any monitors. | |
539 bool has_monitors() const { return is_synchronized() || access_flags().has_monitor_bytecodes(); } | |
540 bool has_monitor_bytecodes() const { return access_flags().has_monitor_bytecodes(); } | |
541 | |
542 void set_has_monitor_bytecodes() { _access_flags.set_has_monitor_bytecodes(); } | |
543 | |
544 // monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes | |
545 // propererly nest in the method. It might return false, even though they actually nest properly, since the info. | |
546 // has not been computed yet. | |
547 bool guaranteed_monitor_matching() const { return access_flags().is_monitor_matching(); } | |
548 void set_guaranteed_monitor_matching() { _access_flags.set_monitor_matching(); } | |
549 | |
550 // returns true if the method is an accessor function (setter/getter). | |
551 bool is_accessor() const; | |
552 | |
553 // returns true if the method is an initializer (<init> or <clinit>). | |
554 bool is_initializer() const; | |
555 | |
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556 // returns true if the method is static OR if the classfile version < 51 |
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557 bool has_valid_initializer_flags() const; |
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558 |
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559 // returns true if the method name is <clinit> and the method has |
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560 // valid static initializer flags. |
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561 bool is_static_initializer() const; |
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562 |
0 | 563 // compiled code support |
564 // NOTE: code() is inherently racy as deopt can be clearing code | |
565 // simultaneously. Use with caution. | |
566 bool has_compiled_code() const { return code() != NULL; } | |
567 | |
568 // sizing | |
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569 static int header_size() { return sizeof(Method)/HeapWordSize; } |
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570 static int size(bool is_native); |
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571 int size() const { return method_size(); } |
7956 | 572 #if INCLUDE_SERVICES |
573 void collect_statistics(KlassSizeStats *sz) const; | |
574 #endif | |
0 | 575 |
576 // interpreter support | |
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577 static ByteSize const_offset() { return byte_offset_of(Method, _constMethod ); } |
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578 static ByteSize access_flags_offset() { return byte_offset_of(Method, _access_flags ); } |
0 | 579 #ifdef CC_INTERP |
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580 static ByteSize result_index_offset() { return byte_offset_of(Method, _result_index ); } |
0 | 581 #endif /* CC_INTERP */ |
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582 static ByteSize from_compiled_offset() { return byte_offset_of(Method, _from_compiled_entry); } |
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583 static ByteSize code_offset() { return byte_offset_of(Method, _code); } |
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584 static ByteSize invocation_counter_offset() { return byte_offset_of(Method, _invocation_counter); } |
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585 static ByteSize backedge_counter_offset() { return byte_offset_of(Method, _backedge_counter); } |
0 | 586 static ByteSize method_data_offset() { |
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587 return byte_offset_of(Method, _method_data); |
0 | 588 } |
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589 static ByteSize interpreter_invocation_counter_offset() { return byte_offset_of(Method, _interpreter_invocation_count); } |
0 | 590 #ifndef PRODUCT |
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591 static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(Method, _compiled_invocation_count); } |
0 | 592 #endif // not PRODUCT |
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593 static ByteSize native_function_offset() { return in_ByteSize(sizeof(Method)); } |
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594 static ByteSize from_interpreted_offset() { return byte_offset_of(Method, _from_interpreted_entry ); } |
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595 static ByteSize interpreter_entry_offset() { return byte_offset_of(Method, _i2i_entry ); } |
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596 static ByteSize signature_handler_offset() { return in_ByteSize(sizeof(Method) + wordSize); } |
0 | 597 |
598 // for code generation | |
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599 static int method_data_offset_in_bytes() { return offset_of(Method, _method_data); } |
0 | 600 static int interpreter_invocation_counter_offset_in_bytes() |
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601 { return offset_of(Method, _interpreter_invocation_count); } |
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602 static int intrinsic_id_offset_in_bytes() { return offset_of(Method, _intrinsic_id); } |
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603 static int intrinsic_id_size_in_bytes() { return sizeof(u1); } |
0 | 604 |
605 // Static methods that are used to implement member methods where an exposed this pointer | |
606 // is needed due to possible GCs | |
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607 static objArrayHandle resolved_checked_exceptions_impl(Method* this_oop, TRAPS); |
0 | 608 |
609 // Returns the byte code index from the byte code pointer | |
610 int bci_from(address bcp) const; | |
611 address bcp_from(int bci) const; | |
612 int validate_bci_from_bcx(intptr_t bcx) const; | |
613 | |
614 // Returns the line number for a bci if debugging information for the method is prowided, | |
615 // -1 is returned otherwise. | |
616 int line_number_from_bci(int bci) const; | |
617 | |
618 // Reflection support | |
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619 bool is_overridden_in(Klass* k) const; |
0 | 620 |
710 | 621 // JSR 292 support |
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622 bool is_method_handle_intrinsic() const; // MethodHandles::is_signature_polymorphic_intrinsic(intrinsic_id) |
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623 bool is_compiled_lambda_form() const; // intrinsic_id() == vmIntrinsics::_compiledLambdaForm |
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624 bool has_member_arg() const; // intrinsic_id() == vmIntrinsics::_linkToSpecial, etc. |
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625 static methodHandle make_method_handle_intrinsic(vmIntrinsics::ID iid, // _invokeBasic, _linkToVirtual |
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626 Symbol* signature, //anything at all |
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627 TRAPS); |
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628 static Klass* check_non_bcp_klass(Klass* klass); |
710 | 629 // these operate only on invoke methods: |
630 // presize interpreter frames for extra interpreter stack entries, if needed | |
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631 // method handles want to be able to push a few extra values (e.g., a bound receiver), and |
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632 // invokedynamic sometimes needs to push a bootstrap method, call site, and arglist, |
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633 // all without checking for a stack overflow |
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634 static int extra_stack_entries() { return EnableInvokeDynamic ? 2 : 0; } |
710 | 635 static int extra_stack_words(); // = extra_stack_entries() * Interpreter::stackElementSize() |
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636 |
0 | 637 // RedefineClasses() support: |
638 bool is_old() const { return access_flags().is_old(); } | |
639 void set_is_old() { _access_flags.set_is_old(); } | |
640 bool is_obsolete() const { return access_flags().is_obsolete(); } | |
641 void set_is_obsolete() { _access_flags.set_is_obsolete(); } | |
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642 bool on_stack() const { return access_flags().on_stack(); } |
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643 void set_on_stack(const bool value); |
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644 |
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645 // see the definition in Method*.cpp for the gory details |
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646 bool should_not_be_cached() const; |
0 | 647 |
648 // JVMTI Native method prefixing support: | |
649 bool is_prefixed_native() const { return access_flags().is_prefixed_native(); } | |
650 void set_is_prefixed_native() { _access_flags.set_is_prefixed_native(); } | |
651 | |
652 // Rewriting support | |
653 static methodHandle clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length, | |
654 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS); | |
655 | |
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656 // jmethodID handling |
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657 // Because the useful life-span of a jmethodID cannot be determined, |
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658 // once created they are never reclaimed. The methods to which they refer, |
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659 // however, can be GC'ed away if the class is unloaded or if the method is |
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660 // made obsolete or deleted -- in these cases, the jmethodID |
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661 // refers to NULL (as is the case for any weak reference). |
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662 static jmethodID make_jmethod_id(ClassLoaderData* loader_data, Method* mh); |
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663 static void destroy_jmethod_id(ClassLoaderData* loader_data, jmethodID mid); |
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664 |
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665 // Use resolve_jmethod_id() in situations where the caller is expected |
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666 // to provide a valid jmethodID; the only sanity checks are in asserts; |
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667 // result guaranteed not to be NULL. |
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668 inline static Method* resolve_jmethod_id(jmethodID mid) { |
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669 assert(mid != NULL, "JNI method id should not be null"); |
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670 return *((Method**)mid); |
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671 } |
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672 |
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673 // Use checked_resolve_jmethod_id() in situations where the caller |
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674 // should provide a valid jmethodID, but might not. NULL is returned |
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675 // when the jmethodID does not refer to a valid method. |
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676 static Method* checked_resolve_jmethod_id(jmethodID mid); |
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677 |
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678 static void change_method_associated_with_jmethod_id(jmethodID old_jmid_ptr, Method* new_method); |
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679 static bool is_method_id(jmethodID mid); |
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680 |
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681 // Clear methods |
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682 static void clear_jmethod_ids(ClassLoaderData* loader_data); |
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683 static void print_jmethod_ids(ClassLoaderData* loader_data, outputStream* out) PRODUCT_RETURN; |
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684 |
0 | 685 // Get this method's jmethodID -- allocate if it doesn't exist |
686 jmethodID jmethod_id() { methodHandle this_h(this); | |
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687 return InstanceKlass::get_jmethod_id(method_holder(), this_h); } |
0 | 688 |
689 // Lookup the jmethodID for this method. Return NULL if not found. | |
690 // NOTE that this function can be called from a signal handler | |
691 // (see AsyncGetCallTrace support for Forte Analyzer) and this | |
692 // needs to be async-safe. No allocation should be done and | |
693 // so handles are not used to avoid deadlock. | |
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694 jmethodID find_jmethod_id_or_null() { return method_holder()->jmethod_id_or_null(this); } |
0 | 695 |
696 // JNI static invoke cached itable index accessors | |
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697 int cached_itable_index() { return method_holder()->cached_itable_index(method_idnum()); } |
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698 void set_cached_itable_index(int index) { method_holder()->set_cached_itable_index(method_idnum(), index); } |
0 | 699 |
700 // Support for inlining of intrinsic methods | |
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701 vmIntrinsics::ID intrinsic_id() const { return (vmIntrinsics::ID) _intrinsic_id; } |
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702 void set_intrinsic_id(vmIntrinsics::ID id) { _intrinsic_id = (u1) id; } |
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703 |
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704 // Helper routines for intrinsic_id() and vmIntrinsics::method(). |
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705 void init_intrinsic_id(); // updates from _none if a match |
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706 static vmSymbols::SID klass_id_for_intrinsics(Klass* holder); |
0 | 707 |
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708 bool jfr_towrite() { return _jfr_towrite; } |
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709 void set_jfr_towrite(bool towrite) { _jfr_towrite = towrite; } |
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710 |
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711 bool force_inline() { return _force_inline; } |
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712 void set_force_inline(bool x) { _force_inline = x; } |
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713 bool dont_inline() { return _dont_inline; } |
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714 void set_dont_inline(bool x) { _dont_inline = x; } |
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715 bool is_hidden() { return _hidden; } |
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716 void set_hidden(bool x) { _hidden = x; } |
6934 | 717 ConstMethod::MethodType method_type() const { |
718 return _constMethod->method_type(); | |
719 } | |
720 bool is_overpass() const { return method_type() == ConstMethod::OVERPASS; } | |
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721 |
0 | 722 // On-stack replacement support |
1783 | 723 bool has_osr_nmethod(int level, bool match_level) { |
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724 return method_holder()->lookup_osr_nmethod(this, InvocationEntryBci, level, match_level) != NULL; |
1783 | 725 } |
726 | |
727 nmethod* lookup_osr_nmethod_for(int bci, int level, bool match_level) { | |
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728 return method_holder()->lookup_osr_nmethod(this, bci, level, match_level); |
1783 | 729 } |
0 | 730 |
731 // Inline cache support | |
732 void cleanup_inline_caches(); | |
733 | |
734 // Find if klass for method is loaded | |
735 bool is_klass_loaded_by_klass_index(int klass_index) const; | |
736 bool is_klass_loaded(int refinfo_index, bool must_be_resolved = false) const; | |
737 | |
738 // Indicates whether compilation failed earlier for this method, or | |
739 // whether it is not compilable for another reason like having a | |
740 // breakpoint set in it. | |
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741 bool is_not_compilable(int comp_level = CompLevel_any) const; |
7998 | 742 void set_not_compilable(int comp_level = CompLevel_all, bool report = true, const char* reason = NULL); |
1783 | 743 void set_not_compilable_quietly(int comp_level = CompLevel_all) { |
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744 set_not_compilable(comp_level, false); |
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745 } |
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746 bool is_not_osr_compilable(int comp_level = CompLevel_any) const; |
7998 | 747 void set_not_osr_compilable(int comp_level = CompLevel_all, bool report = true, const char* reason = NULL); |
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748 void set_not_osr_compilable_quietly(int comp_level = CompLevel_all) { |
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749 set_not_osr_compilable(comp_level, false); |
1783 | 750 } |
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751 |
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752 private: |
7998 | 753 void print_made_not_compilable(int comp_level, bool is_osr, bool report, const char* reason); |
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754 |
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755 public: |
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756 bool is_not_c1_compilable() const { return access_flags().is_not_c1_compilable(); } |
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757 void set_not_c1_compilable() { _access_flags.set_not_c1_compilable(); } |
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758 bool is_not_c2_compilable() const { return access_flags().is_not_c2_compilable(); } |
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759 void set_not_c2_compilable() { _access_flags.set_not_c2_compilable(); } |
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760 |
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761 bool is_not_c1_osr_compilable() const { return is_not_c1_compilable(); } // don't waste an accessFlags bit |
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762 void set_not_c1_osr_compilable() { set_not_c1_compilable(); } // don't waste an accessFlags bit |
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763 bool is_not_c2_osr_compilable() const { return access_flags().is_not_c2_osr_compilable(); } |
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764 void set_not_c2_osr_compilable() { _access_flags.set_not_c2_osr_compilable(); } |
0 | 765 |
766 // Background compilation support | |
1783 | 767 bool queued_for_compilation() const { return access_flags().queued_for_compilation(); } |
768 void set_queued_for_compilation() { _access_flags.set_queued_for_compilation(); } | |
769 void clear_queued_for_compilation() { _access_flags.clear_queued_for_compilation(); } | |
0 | 770 |
771 // Resolve all classes in signature, return 'true' if successful | |
772 static bool load_signature_classes(methodHandle m, TRAPS); | |
773 | |
774 // Return if true if not all classes references in signature, including return type, has been loaded | |
775 static bool has_unloaded_classes_in_signature(methodHandle m, TRAPS); | |
776 | |
777 // Printing | |
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778 void print_short_name(outputStream* st = tty); // prints as klassname::methodname; Exposed so field engineers can debug VM |
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779 #if INCLUDE_JVMTI |
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780 void print_name(outputStream* st = tty); // prints as "virtual void foo(int)"; exposed for TraceRedefineClasses |
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781 #else |
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782 void print_name(outputStream* st = tty) PRODUCT_RETURN; // prints as "virtual void foo(int)" |
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783 #endif |
0 | 784 |
785 // Helper routine used for method sorting | |
8031 | 786 static void sort_methods(Array<Method*>* methods, bool idempotent = false); |
0 | 787 |
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788 // Deallocation function for redefine classes or if an error occurs |
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789 void deallocate_contents(ClassLoaderData* loader_data); |
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790 |
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791 // Printing |
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792 #ifndef PRODUCT |
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793 void print_on(outputStream* st) const; |
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794 #endif |
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795 void print_value_on(outputStream* st) const; |
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796 |
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797 const char* internal_name() const { return "{method}"; } |
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798 |
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799 // Check for valid method pointer |
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800 bool is_valid_method() const; |
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801 |
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802 // Verify |
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803 void verify() { verify_on(tty); } |
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804 void verify_on(outputStream* st); |
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805 |
0 | 806 private: |
807 | |
808 // Inlined elements | |
809 address* native_function_addr() const { assert(is_native(), "must be native"); return (address*) (this+1); } | |
810 address* signature_handler_addr() const { return native_function_addr() + 1; } | |
811 }; | |
812 | |
813 | |
814 // Utility class for compressing line number tables | |
815 | |
816 class CompressedLineNumberWriteStream: public CompressedWriteStream { | |
817 private: | |
818 int _bci; | |
819 int _line; | |
820 public: | |
821 // Constructor | |
822 CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {} | |
823 CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {} | |
824 | |
825 // Write (bci, line number) pair to stream | |
826 void write_pair_regular(int bci_delta, int line_delta); | |
827 | |
828 inline void write_pair_inline(int bci, int line) { | |
829 int bci_delta = bci - _bci; | |
830 int line_delta = line - _line; | |
831 _bci = bci; | |
832 _line = line; | |
833 // Skip (0,0) deltas - they do not add information and conflict with terminator. | |
834 if (bci_delta == 0 && line_delta == 0) return; | |
835 // Check if bci is 5-bit and line number 3-bit unsigned. | |
836 if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) { | |
837 // Compress into single byte. | |
838 jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta; | |
839 // Check that value doesn't match escape character. | |
840 if (value != 0xFF) { | |
841 write_byte(value); | |
842 return; | |
843 } | |
844 } | |
845 write_pair_regular(bci_delta, line_delta); | |
846 } | |
847 | |
848 // Windows AMD64 + Apr 2005 PSDK with /O2 generates bad code for write_pair. | |
849 // Disabling optimization doesn't work for methods in header files | |
850 // so we force it to call through the non-optimized version in the .cpp. | |
851 // It's gross, but it's the only way we can ensure that all callers are | |
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852 // fixed. _MSC_VER is defined by the windows compiler |
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853 #if defined(_M_AMD64) && _MSC_VER >= 1400 |
0 | 854 void write_pair(int bci, int line); |
855 #else | |
856 void write_pair(int bci, int line) { write_pair_inline(bci, line); } | |
857 #endif | |
858 | |
859 // Write end-of-stream marker | |
860 void write_terminator() { write_byte(0); } | |
861 }; | |
862 | |
863 | |
864 // Utility class for decompressing line number tables | |
865 | |
866 class CompressedLineNumberReadStream: public CompressedReadStream { | |
867 private: | |
868 int _bci; | |
869 int _line; | |
870 public: | |
871 // Constructor | |
872 CompressedLineNumberReadStream(u_char* buffer); | |
873 // Read (bci, line number) pair from stream. Returns false at end-of-stream. | |
874 bool read_pair(); | |
875 // Accessing bci and line number (after calling read_pair) | |
876 int bci() const { return _bci; } | |
877 int line() const { return _line; } | |
878 }; | |
879 | |
880 | |
881 /// Fast Breakpoints. | |
882 | |
883 // If this structure gets more complicated (because bpts get numerous), | |
884 // move it into its own header. | |
885 | |
886 // There is presently no provision for concurrent access | |
887 // to breakpoint lists, which is only OK for JVMTI because | |
888 // breakpoints are written only at safepoints, and are read | |
889 // concurrently only outside of safepoints. | |
890 | |
6197 | 891 class BreakpointInfo : public CHeapObj<mtClass> { |
0 | 892 friend class VMStructs; |
893 private: | |
894 Bytecodes::Code _orig_bytecode; | |
895 int _bci; | |
896 u2 _name_index; // of method | |
897 u2 _signature_index; // of method | |
898 BreakpointInfo* _next; // simple storage allocation | |
899 | |
900 public: | |
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901 BreakpointInfo(Method* m, int bci); |
0 | 902 |
903 // accessors | |
904 Bytecodes::Code orig_bytecode() { return _orig_bytecode; } | |
905 void set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; } | |
906 int bci() { return _bci; } | |
907 | |
908 BreakpointInfo* next() const { return _next; } | |
909 void set_next(BreakpointInfo* n) { _next = n; } | |
910 | |
911 // helps for searchers | |
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912 bool match(const Method* m, int bci) { |
0 | 913 return bci == _bci && match(m); |
914 } | |
915 | |
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916 bool match(const Method* m) { |
0 | 917 return _name_index == m->name_index() && |
918 _signature_index == m->signature_index(); | |
919 } | |
920 | |
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921 void set(Method* method); |
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922 void clear(Method* method); |
0 | 923 }; |
1972 | 924 |
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925 // Utility class for access exception handlers |
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926 class ExceptionTable : public StackObj { |
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927 private: |
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928 ExceptionTableElement* _table; |
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929 u2 _length; |
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930 |
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931 public: |
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932 ExceptionTable(Method* m) { |
6213
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933 if (m->has_exception_handler()) { |
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934 _table = m->exception_table_start(); |
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935 _length = m->exception_table_length(); |
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936 } else { |
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937 _table = NULL; |
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938 _length = 0; |
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939 } |
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940 } |
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941 |
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942 int length() const { |
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943 return _length; |
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944 } |
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945 |
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946 u2 start_pc(int idx) const { |
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947 assert(idx < _length, "out of bounds"); |
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948 return _table[idx].start_pc; |
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949 } |
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950 |
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951 void set_start_pc(int idx, u2 value) { |
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952 assert(idx < _length, "out of bounds"); |
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953 _table[idx].start_pc = value; |
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954 } |
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955 |
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956 u2 end_pc(int idx) const { |
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957 assert(idx < _length, "out of bounds"); |
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958 return _table[idx].end_pc; |
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959 } |
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960 |
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961 void set_end_pc(int idx, u2 value) { |
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962 assert(idx < _length, "out of bounds"); |
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963 _table[idx].end_pc = value; |
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964 } |
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965 |
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966 u2 handler_pc(int idx) const { |
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967 assert(idx < _length, "out of bounds"); |
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968 return _table[idx].handler_pc; |
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969 } |
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970 |
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971 void set_handler_pc(int idx, u2 value) { |
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972 assert(idx < _length, "out of bounds"); |
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973 _table[idx].handler_pc = value; |
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974 } |
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975 |
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976 u2 catch_type_index(int idx) const { |
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977 assert(idx < _length, "out of bounds"); |
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978 return _table[idx].catch_type_index; |
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979 } |
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980 |
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981 void set_catch_type_index(int idx, u2 value) { |
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982 assert(idx < _length, "out of bounds"); |
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983 _table[idx].catch_type_index = value; |
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984 } |
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985 }; |
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986 |
1972 | 987 #endif // SHARE_VM_OOPS_METHODOOP_HPP |