Mercurial > hg > truffle
annotate src/share/vm/oops/methodOop.hpp @ 6271:93c71eb28866
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Reviewed-by: kvn, jrose
author | twisti |
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date | Tue, 07 Aug 2012 14:32:08 -0700 |
parents | 1d7922586cf6 |
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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 #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" | |
32 #include "oops/constMethodOop.hpp" | |
33 #include "oops/constantPoolOop.hpp" | |
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 | |
0 | 40 // A methodOop represents a Java method. |
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 // | |
47 // The actual bytecodes are inlined after the end of the methodOopDesc struct. | |
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 // |------------------------------------------------------| | |
66 // | constMethodOop (oop) | | |
67 // |------------------------------------------------------| | |
68 // | methodData (oop) | | |
69 // | interp_invocation_count | | |
70 // |------------------------------------------------------| | |
71 // | access_flags | | |
72 // | vtable_index | | |
73 // |------------------------------------------------------| | |
74 // | result_index (C++ interpreter only) | | |
75 // |------------------------------------------------------| | |
76 // | method_size | max_stack | | |
77 // | max_locals | size_of_parameters | | |
78 // |------------------------------------------------------| | |
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79 // |intrinsic_id| flags | throwout_count | |
0 | 80 // |------------------------------------------------------| |
1783 | 81 // | num_breakpoints | (unused) | |
0 | 82 // |------------------------------------------------------| |
83 // | invocation_counter | | |
84 // | backedge_counter | | |
85 // |------------------------------------------------------| | |
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86 // | prev_time (tiered only, 64 bit wide) | |
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87 // | | |
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88 // |------------------------------------------------------| |
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89 // | rate (tiered) | |
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90 // |------------------------------------------------------| |
0 | 91 // | code (pointer) | |
92 // | i2i (pointer) | | |
93 // | adapter (pointer) | | |
94 // | from_compiled_entry (pointer) | | |
95 // | from_interpreted_entry (pointer) | | |
96 // |------------------------------------------------------| | |
97 // | native_function (present only if native) | | |
98 // | signature_handler (present only if native) | | |
99 // |------------------------------------------------------| | |
100 | |
101 | |
102 class CheckedExceptionElement; | |
103 class LocalVariableTableElement; | |
104 class AdapterHandlerEntry; | |
105 class methodDataOopDesc; | |
106 | |
107 class methodOopDesc : public oopDesc { | |
108 friend class methodKlass; | |
109 friend class VMStructs; | |
110 private: | |
111 constMethodOop _constMethod; // Method read-only data. | |
112 methodDataOop _method_data; | |
1783 | 113 int _interpreter_invocation_count; // Count of times invoked (reused as prev_event_count in tiered) |
0 | 114 AccessFlags _access_flags; // Access flags |
115 int _vtable_index; // vtable index of this method (see VtableIndexFlag) | |
116 // note: can have vtables with >2**16 elements (because of inheritance) | |
117 #ifdef CC_INTERP | |
118 int _result_index; // C++ interpreter needs for converting results to/from stack | |
119 #endif | |
120 u2 _method_size; // size of this object | |
121 u2 _max_stack; // Maximum number of entries on the expression stack | |
122 u2 _max_locals; // Number of local variables used by this method | |
123 u2 _size_of_parameters; // size of the parameter block (receiver + arguments) in words | |
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124 u1 _intrinsic_id; // vmSymbols::intrinsic_id (0 == _none) |
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125 u1 _jfr_towrite : 1, // Flags |
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126 _force_inline : 1, |
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127 _hidden : 1, |
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128 _dont_inline : 1, |
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129 : 4; |
0 | 130 u2 _interpreter_throwout_count; // Count of times method was exited via exception while interpreting |
131 u2 _number_of_breakpoints; // fullspeed debugging support | |
132 InvocationCounter _invocation_counter; // Incremented before each activation of the method - used to trigger frequency-based optimizations | |
133 InvocationCounter _backedge_counter; // Incremented before each backedge taken - used to trigger frequencey-based optimizations | |
1783 | 134 |
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135 #ifdef TIERED |
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136 jlong _prev_time; // Previous time the rate was acquired |
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137 float _rate; // Events (invocation and backedge counter increments) per millisecond |
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138 #endif |
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139 |
0 | 140 #ifndef PRODUCT |
141 int _compiled_invocation_count; // Number of nmethod invocations so far (for perf. debugging) | |
142 #endif | |
143 // Entry point for calling both from and to the interpreter. | |
144 address _i2i_entry; // All-args-on-stack calling convention | |
145 // Adapter blob (i2c/c2i) for this methodOop. Set once when method is linked. | |
146 AdapterHandlerEntry* _adapter; | |
147 // Entry point for calling from compiled code, to compiled code if it exists | |
148 // or else the interpreter. | |
149 volatile address _from_compiled_entry; // Cache of: _code ? _code->entry_point() : _adapter->c2i_entry() | |
150 // The entry point for calling both from and to compiled code is | |
151 // "_code->entry_point()". Because of tiered compilation and de-opt, this | |
152 // field can come and go. It can transition from NULL to not-null at any | |
153 // time (whenever a compile completes). It can transition from not-null to | |
154 // NULL only at safepoints (because of a de-opt). | |
155 nmethod* volatile _code; // Points to the corresponding piece of native code | |
156 volatile address _from_interpreted_entry; // Cache of _code ? _adapter->i2c_entry() : _i2i_entry | |
157 | |
158 public: | |
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159 |
0 | 160 // accessors for instance variables |
161 constMethodOop constMethod() const { return _constMethod; } | |
162 void set_constMethod(constMethodOop xconst) { oop_store_without_check((oop*)&_constMethod, (oop)xconst); } | |
163 | |
164 | |
165 static address make_adapters(methodHandle mh, TRAPS); | |
166 volatile address from_compiled_entry() const { return (address)OrderAccess::load_ptr_acquire(&_from_compiled_entry); } | |
167 volatile address from_interpreted_entry() const{ return (address)OrderAccess::load_ptr_acquire(&_from_interpreted_entry); } | |
168 | |
169 // access flag | |
170 AccessFlags access_flags() const { return _access_flags; } | |
171 void set_access_flags(AccessFlags flags) { _access_flags = flags; } | |
172 | |
173 // name | |
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174 Symbol* name() const { return constants()->symbol_at(name_index()); } |
0 | 175 int name_index() const { return constMethod()->name_index(); } |
176 void set_name_index(int index) { constMethod()->set_name_index(index); } | |
177 | |
178 // signature | |
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179 Symbol* signature() const { return constants()->symbol_at(signature_index()); } |
0 | 180 int signature_index() const { return constMethod()->signature_index(); } |
181 void set_signature_index(int index) { constMethod()->set_signature_index(index); } | |
182 | |
183 // generics support | |
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184 Symbol* generic_signature() const { int idx = generic_signature_index(); return ((idx != 0) ? constants()->symbol_at(idx) : (Symbol*)NULL); } |
0 | 185 int generic_signature_index() const { return constMethod()->generic_signature_index(); } |
186 void set_generic_signature_index(int index) { constMethod()->set_generic_signature_index(index); } | |
187 | |
188 // annotations support | |
189 typeArrayOop annotations() const { return instanceKlass::cast(method_holder())->get_method_annotations_of(method_idnum()); } | |
190 typeArrayOop parameter_annotations() const { return instanceKlass::cast(method_holder())->get_method_parameter_annotations_of(method_idnum()); } | |
191 typeArrayOop annotation_default() const { return instanceKlass::cast(method_holder())->get_method_default_annotations_of(method_idnum()); } | |
192 | |
193 #ifdef CC_INTERP | |
194 void set_result_index(BasicType type); | |
195 int result_index() { return _result_index; } | |
196 #endif | |
197 | |
198 // Helper routine: get klass name + "." + method name + signature as | |
199 // C string, for the purpose of providing more useful NoSuchMethodErrors | |
200 // and fatal error handling. The string is allocated in resource | |
201 // area if a buffer is not provided by the caller. | |
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202 char* name_and_sig_as_C_string() const; |
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203 char* name_and_sig_as_C_string(char* buf, int size) const; |
0 | 204 |
205 // Static routine in the situations we don't have a methodOop | |
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206 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature); |
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207 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size); |
0 | 208 |
2142 | 209 Bytecodes::Code java_code_at(int bci) const { |
210 return Bytecodes::java_code_at(this, bcp_from(bci)); | |
211 } | |
212 Bytecodes::Code code_at(int bci) const { | |
213 return Bytecodes::code_at(this, bcp_from(bci)); | |
214 } | |
215 | |
0 | 216 // JVMTI breakpoints |
2142 | 217 Bytecodes::Code orig_bytecode_at(int bci) const; |
0 | 218 void set_orig_bytecode_at(int bci, Bytecodes::Code code); |
219 void set_breakpoint(int bci); | |
220 void clear_breakpoint(int bci); | |
221 void clear_all_breakpoints(); | |
222 // Tracking number of breakpoints, for fullspeed debugging. | |
223 // Only mutated by VM thread. | |
224 u2 number_of_breakpoints() const { return _number_of_breakpoints; } | |
225 void incr_number_of_breakpoints() { ++_number_of_breakpoints; } | |
226 void decr_number_of_breakpoints() { --_number_of_breakpoints; } | |
227 // Initialization only | |
228 void clear_number_of_breakpoints() { _number_of_breakpoints = 0; } | |
229 | |
230 // index into instanceKlass methods() array | |
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231 // note: also used by jfr |
0 | 232 u2 method_idnum() const { return constMethod()->method_idnum(); } |
233 void set_method_idnum(u2 idnum) { constMethod()->set_method_idnum(idnum); } | |
234 | |
235 // code size | |
236 int code_size() const { return constMethod()->code_size(); } | |
237 | |
238 // method size | |
239 int method_size() const { return _method_size; } | |
240 void set_method_size(int size) { | |
241 assert(0 <= size && size < (1 << 16), "invalid method size"); | |
242 _method_size = size; | |
243 } | |
244 | |
245 // constant pool for klassOop holding this method | |
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246 constantPoolOop constants() const { return constMethod()->constants(); } |
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247 void set_constants(constantPoolOop c) { constMethod()->set_constants(c); } |
0 | 248 |
249 // max stack | |
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250 // return original max stack size for method verification |
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251 int verifier_max_stack() const { return _max_stack; } |
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252 int max_stack() const { return _max_stack + extra_stack_entries(); } |
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253 void set_max_stack(int size) { _max_stack = size; } |
0 | 254 |
255 // max locals | |
256 int max_locals() const { return _max_locals; } | |
257 void set_max_locals(int size) { _max_locals = size; } | |
1783 | 258 |
259 int highest_comp_level() const; | |
260 void set_highest_comp_level(int level); | |
261 int highest_osr_comp_level() const; | |
262 void set_highest_osr_comp_level(int level); | |
0 | 263 |
264 // Count of times method was exited via exception while interpreting | |
265 void interpreter_throwout_increment() { | |
266 if (_interpreter_throwout_count < 65534) { | |
267 _interpreter_throwout_count++; | |
268 } | |
269 } | |
270 | |
271 int interpreter_throwout_count() const { return _interpreter_throwout_count; } | |
272 void set_interpreter_throwout_count(int count) { _interpreter_throwout_count = count; } | |
273 | |
274 // size of parameters | |
275 int size_of_parameters() const { return _size_of_parameters; } | |
276 | |
277 bool has_stackmap_table() const { | |
278 return constMethod()->has_stackmap_table(); | |
279 } | |
280 | |
281 typeArrayOop stackmap_data() const { | |
282 return constMethod()->stackmap_data(); | |
283 } | |
284 | |
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285 void set_stackmap_data(typeArrayOop sd) { |
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286 constMethod()->set_stackmap_data(sd); |
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287 } |
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288 |
0 | 289 // exception handler table |
290 bool has_exception_handler() const | |
291 { return constMethod()->has_exception_handler(); } | |
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292 int exception_table_length() const |
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293 { return constMethod()->exception_table_length(); } |
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294 ExceptionTableElement* exception_table_start() const |
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295 { return constMethod()->exception_table_start(); } |
0 | 296 |
297 // Finds the first entry point bci of an exception handler for an | |
298 // exception of klass ex_klass thrown at throw_bci. A value of NULL | |
299 // for ex_klass indicates that the exception klass is not known; in | |
300 // this case it matches any constraint class. Returns -1 if the | |
301 // exception cannot be handled in this method. The handler | |
302 // constraint classes are loaded if necessary. Note that this may | |
303 // throw an exception if loading of the constraint classes causes | |
304 // an IllegalAccessError (bugid 4307310) or an OutOfMemoryError. | |
305 // If an exception is thrown, returns the bci of the | |
306 // exception handler which caused the exception to be thrown, which | |
307 // is needed for proper retries. See, for example, | |
308 // InterpreterRuntime::exception_handler_for_exception. | |
309 int fast_exception_handler_bci_for(KlassHandle ex_klass, int throw_bci, TRAPS); | |
310 | |
311 // method data access | |
312 methodDataOop method_data() const { | |
313 return _method_data; | |
314 } | |
315 void set_method_data(methodDataOop data) { | |
316 oop_store_without_check((oop*)&_method_data, (oop)data); | |
317 } | |
318 | |
319 // invocation counter | |
1783 | 320 InvocationCounter* invocation_counter() { return &_invocation_counter; } |
321 InvocationCounter* backedge_counter() { return &_backedge_counter; } | |
322 | |
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323 #ifdef TIERED |
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324 // We are reusing interpreter_invocation_count as a holder for the previous event count! |
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325 // We can do that since interpreter_invocation_count is not used in tiered. |
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326 int prev_event_count() const { return _interpreter_invocation_count; } |
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327 void set_prev_event_count(int count) { _interpreter_invocation_count = count; } |
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328 jlong prev_time() const { return _prev_time; } |
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329 void set_prev_time(jlong time) { _prev_time = time; } |
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330 float rate() const { return _rate; } |
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331 void set_rate(float rate) { _rate = rate; } |
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332 #endif |
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333 |
1783 | 334 int invocation_count(); |
335 int backedge_count(); | |
336 | |
337 bool was_executed_more_than(int n); | |
338 bool was_never_executed() { return !was_executed_more_than(0); } | |
0 | 339 |
340 static void build_interpreter_method_data(methodHandle method, TRAPS); | |
341 | |
1783 | 342 int interpreter_invocation_count() { |
343 if (TieredCompilation) return invocation_count(); | |
344 else return _interpreter_invocation_count; | |
345 } | |
0 | 346 void set_interpreter_invocation_count(int count) { _interpreter_invocation_count = count; } |
1783 | 347 int increment_interpreter_invocation_count() { |
348 if (TieredCompilation) ShouldNotReachHere(); | |
349 return ++_interpreter_invocation_count; | |
350 } | |
0 | 351 |
352 #ifndef PRODUCT | |
1783 | 353 int compiled_invocation_count() const { return _compiled_invocation_count; } |
0 | 354 void set_compiled_invocation_count(int count) { _compiled_invocation_count = count; } |
355 #endif // not PRODUCT | |
356 | |
605 | 357 // Clear (non-shared space) pointers which could not be relevant |
0 | 358 // if this (shared) method were mapped into another JVM. |
359 void remove_unshareable_info(); | |
360 | |
361 // nmethod/verified compiler entry | |
362 address verified_code_entry(); | |
363 bool check_code() const; // Not inline to avoid circular ref | |
364 nmethod* volatile code() const { assert( check_code(), "" ); return (nmethod *)OrderAccess::load_ptr_acquire(&_code); } | |
365 void clear_code(); // Clear out any compiled code | |
1202 | 366 static void set_code(methodHandle mh, nmethod* code); |
0 | 367 void set_adapter_entry(AdapterHandlerEntry* adapter) { _adapter = adapter; } |
368 address get_i2c_entry(); | |
369 address get_c2i_entry(); | |
370 address get_c2i_unverified_entry(); | |
371 AdapterHandlerEntry* adapter() { return _adapter; } | |
372 // setup entry points | |
373 void link_method(methodHandle method, TRAPS); | |
374 // clear entry points. Used by sharing code | |
375 void unlink_method(); | |
376 | |
377 // vtable index | |
378 enum VtableIndexFlag { | |
379 // Valid vtable indexes are non-negative (>= 0). | |
380 // These few negative values are used as sentinels. | |
710 | 381 highest_unused_vtable_index_value = -5, |
0 | 382 invalid_vtable_index = -4, // distinct from any valid vtable index |
383 garbage_vtable_index = -3, // not yet linked; no vtable layout yet | |
384 nonvirtual_vtable_index = -2 // there is no need for vtable dispatch | |
385 // 6330203 Note: Do not use -1, which was overloaded with many meanings. | |
386 }; | |
387 DEBUG_ONLY(bool valid_vtable_index() const { return _vtable_index >= nonvirtual_vtable_index; }) | |
388 int vtable_index() const { assert(valid_vtable_index(), ""); | |
389 return _vtable_index; } | |
390 void set_vtable_index(int index) { _vtable_index = index; } | |
391 | |
392 // interpreter entry | |
393 address interpreter_entry() const { return _i2i_entry; } | |
394 // Only used when first initialize so we can set _i2i_entry and _from_interpreted_entry | |
395 void set_interpreter_entry(address entry) { _i2i_entry = entry; _from_interpreted_entry = entry; } | |
396 int interpreter_kind(void) { | |
397 return constMethod()->interpreter_kind(); | |
398 } | |
399 void set_interpreter_kind(); | |
400 void set_interpreter_kind(int kind) { | |
401 constMethod()->set_interpreter_kind(kind); | |
402 } | |
403 | |
404 // native function (used for native methods only) | |
405 enum { | |
406 native_bind_event_is_interesting = true | |
407 }; | |
408 address native_function() const { return *(native_function_addr()); } | |
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409 address critical_native_function(); |
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410 |
0 | 411 // Must specify a real function (not NULL). |
412 // Use clear_native_function() to unregister. | |
413 void set_native_function(address function, bool post_event_flag); | |
414 bool has_native_function() const; | |
415 void clear_native_function(); | |
416 | |
417 // signature handler (used for native methods only) | |
418 address signature_handler() const { return *(signature_handler_addr()); } | |
419 void set_signature_handler(address handler); | |
420 | |
421 // Interpreter oopmap support | |
422 void mask_for(int bci, InterpreterOopMap* mask); | |
423 | |
424 #ifndef PRODUCT | |
425 // operations on invocation counter | |
1783 | 426 void print_invocation_count(); |
0 | 427 #endif |
428 | |
429 // byte codes | |
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430 void set_code(address code) { return constMethod()->set_code(code); } |
0 | 431 address code_base() const { return constMethod()->code_base(); } |
432 bool contains(address bcp) const { return constMethod()->contains(bcp); } | |
433 | |
434 // prints byte codes | |
435 void print_codes() const { print_codes_on(tty); } | |
436 void print_codes_on(outputStream* st) const PRODUCT_RETURN; | |
437 void print_codes_on(int from, int to, outputStream* st) const PRODUCT_RETURN; | |
438 | |
439 // checked exceptions | |
440 int checked_exceptions_length() const | |
441 { return constMethod()->checked_exceptions_length(); } | |
442 CheckedExceptionElement* checked_exceptions_start() const | |
443 { return constMethod()->checked_exceptions_start(); } | |
444 | |
445 // localvariable table | |
446 bool has_localvariable_table() const | |
447 { return constMethod()->has_localvariable_table(); } | |
448 int localvariable_table_length() const | |
449 { return constMethod()->localvariable_table_length(); } | |
450 LocalVariableTableElement* localvariable_table_start() const | |
451 { return constMethod()->localvariable_table_start(); } | |
452 | |
453 bool has_linenumber_table() const | |
454 { return constMethod()->has_linenumber_table(); } | |
455 u_char* compressed_linenumber_table() const | |
456 { return constMethod()->compressed_linenumber_table(); } | |
457 | |
458 // method holder (the klassOop holding this method) | |
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459 klassOop method_holder() const { return constants()->pool_holder(); } |
0 | 460 |
461 void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments) | |
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462 Symbol* klass_name() const; // returns the name of the method holder |
0 | 463 BasicType result_type() const; // type of the method result |
464 int result_type_index() const; // type index of the method result | |
465 bool is_returning_oop() const { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); } | |
466 bool is_returning_fp() const { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); } | |
467 | |
468 // Checked exceptions thrown by this method (resolved to mirrors) | |
469 objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); } | |
470 | |
471 // Access flags | |
472 bool is_public() const { return access_flags().is_public(); } | |
473 bool is_private() const { return access_flags().is_private(); } | |
474 bool is_protected() const { return access_flags().is_protected(); } | |
475 bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); } | |
476 bool is_static() const { return access_flags().is_static(); } | |
477 bool is_final() const { return access_flags().is_final(); } | |
478 bool is_synchronized() const { return access_flags().is_synchronized();} | |
479 bool is_native() const { return access_flags().is_native(); } | |
480 bool is_abstract() const { return access_flags().is_abstract(); } | |
481 bool is_strict() const { return access_flags().is_strict(); } | |
482 bool is_synthetic() const { return access_flags().is_synthetic(); } | |
483 | |
484 // returns true if contains only return operation | |
485 bool is_empty_method() const; | |
486 | |
487 // returns true if this is a vanilla constructor | |
488 bool is_vanilla_constructor() const; | |
489 | |
490 // checks method and its method holder | |
491 bool is_final_method() const; | |
492 bool is_strict_method() const; | |
493 | |
494 // true if method needs no dynamic dispatch (final and/or no vtable entry) | |
495 bool can_be_statically_bound() const; | |
496 | |
497 // returns true if the method has any backward branches. | |
498 bool has_loops() { | |
499 return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag(); | |
500 }; | |
501 | |
502 bool compute_has_loops_flag(); | |
503 | |
504 bool has_jsrs() { | |
505 return access_flags().has_jsrs(); | |
506 }; | |
507 void set_has_jsrs() { | |
508 _access_flags.set_has_jsrs(); | |
509 } | |
510 | |
511 // returns true if the method has any monitors. | |
512 bool has_monitors() const { return is_synchronized() || access_flags().has_monitor_bytecodes(); } | |
513 bool has_monitor_bytecodes() const { return access_flags().has_monitor_bytecodes(); } | |
514 | |
515 void set_has_monitor_bytecodes() { _access_flags.set_has_monitor_bytecodes(); } | |
516 | |
517 // monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes | |
518 // propererly nest in the method. It might return false, even though they actually nest properly, since the info. | |
519 // has not been computed yet. | |
520 bool guaranteed_monitor_matching() const { return access_flags().is_monitor_matching(); } | |
521 void set_guaranteed_monitor_matching() { _access_flags.set_monitor_matching(); } | |
522 | |
523 // returns true if the method is an accessor function (setter/getter). | |
524 bool is_accessor() const; | |
525 | |
526 // returns true if the method is an initializer (<init> or <clinit>). | |
527 bool is_initializer() const; | |
528 | |
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529 // returns true if the method is static OR if the classfile version < 51 |
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530 bool has_valid_initializer_flags() const; |
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531 |
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532 // returns true if the method name is <clinit> and the method has |
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533 // valid static initializer flags. |
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534 bool is_static_initializer() const; |
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535 |
0 | 536 // compiled code support |
537 // NOTE: code() is inherently racy as deopt can be clearing code | |
538 // simultaneously. Use with caution. | |
539 bool has_compiled_code() const { return code() != NULL; } | |
540 | |
541 // sizing | |
542 static int object_size(bool is_native); | |
543 static int header_size() { return sizeof(methodOopDesc)/HeapWordSize; } | |
544 int object_size() const { return method_size(); } | |
545 | |
546 bool object_is_parsable() const { return method_size() > 0; } | |
547 | |
548 // interpreter support | |
549 static ByteSize const_offset() { return byte_offset_of(methodOopDesc, _constMethod ); } | |
550 static ByteSize access_flags_offset() { return byte_offset_of(methodOopDesc, _access_flags ); } | |
551 #ifdef CC_INTERP | |
552 static ByteSize result_index_offset() { return byte_offset_of(methodOopDesc, _result_index ); } | |
553 #endif /* CC_INTERP */ | |
554 static ByteSize size_of_locals_offset() { return byte_offset_of(methodOopDesc, _max_locals ); } | |
555 static ByteSize size_of_parameters_offset() { return byte_offset_of(methodOopDesc, _size_of_parameters); } | |
556 static ByteSize from_compiled_offset() { return byte_offset_of(methodOopDesc, _from_compiled_entry); } | |
557 static ByteSize code_offset() { return byte_offset_of(methodOopDesc, _code); } | |
558 static ByteSize invocation_counter_offset() { return byte_offset_of(methodOopDesc, _invocation_counter); } | |
559 static ByteSize backedge_counter_offset() { return byte_offset_of(methodOopDesc, _backedge_counter); } | |
560 static ByteSize method_data_offset() { | |
561 return byte_offset_of(methodOopDesc, _method_data); | |
562 } | |
563 static ByteSize interpreter_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _interpreter_invocation_count); } | |
564 #ifndef PRODUCT | |
565 static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _compiled_invocation_count); } | |
566 #endif // not PRODUCT | |
567 static ByteSize native_function_offset() { return in_ByteSize(sizeof(methodOopDesc)); } | |
568 static ByteSize from_interpreted_offset() { return byte_offset_of(methodOopDesc, _from_interpreted_entry ); } | |
569 static ByteSize interpreter_entry_offset() { return byte_offset_of(methodOopDesc, _i2i_entry ); } | |
570 static ByteSize signature_handler_offset() { return in_ByteSize(sizeof(methodOopDesc) + wordSize); } | |
571 static ByteSize max_stack_offset() { return byte_offset_of(methodOopDesc, _max_stack ); } | |
572 | |
573 // for code generation | |
574 static int method_data_offset_in_bytes() { return offset_of(methodOopDesc, _method_data); } | |
575 static int interpreter_invocation_counter_offset_in_bytes() | |
576 { return offset_of(methodOopDesc, _interpreter_invocation_count); } | |
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577 static int intrinsic_id_offset_in_bytes() { return offset_of(methodOopDesc, _intrinsic_id); } |
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578 static int intrinsic_id_size_in_bytes() { return sizeof(u1); } |
0 | 579 |
580 // Static methods that are used to implement member methods where an exposed this pointer | |
581 // is needed due to possible GCs | |
582 static objArrayHandle resolved_checked_exceptions_impl(methodOop this_oop, TRAPS); | |
583 | |
584 // Returns the byte code index from the byte code pointer | |
585 int bci_from(address bcp) const; | |
586 address bcp_from(int bci) const; | |
587 int validate_bci_from_bcx(intptr_t bcx) const; | |
588 | |
589 // Returns the line number for a bci if debugging information for the method is prowided, | |
590 // -1 is returned otherwise. | |
591 int line_number_from_bci(int bci) const; | |
592 | |
593 // Reflection support | |
594 bool is_overridden_in(klassOop k) const; | |
595 | |
710 | 596 // JSR 292 support |
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597 bool is_method_handle_intrinsic() const; // MethodHandles::is_signature_polymorphic_intrinsic(intrinsic_id) |
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598 bool is_compiled_lambda_form() const; // intrinsic_id() == vmIntrinsics::_compiledLambdaForm |
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599 bool has_member_arg() const; // intrinsic_id() == vmIntrinsics::_linkToSpecial, etc. |
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600 static methodHandle make_method_handle_intrinsic(vmIntrinsics::ID iid, // _invokeBasic, _linkToVirtual |
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601 Symbol* signature, //anything at all |
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602 TRAPS); |
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603 static klassOop check_non_bcp_klass(klassOop klass); |
710 | 604 // these operate only on invoke methods: |
605 // presize interpreter frames for extra interpreter stack entries, if needed | |
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606 // method handles want to be able to push a few extra values (e.g., a bound receiver), and |
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607 // invokedynamic sometimes needs to push a bootstrap method, call site, and arglist, |
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608 // all without checking for a stack overflow |
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609 static int extra_stack_entries() { return EnableInvokeDynamic ? 2 : 0; } |
710 | 610 static int extra_stack_words(); // = extra_stack_entries() * Interpreter::stackElementSize() |
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611 |
0 | 612 // RedefineClasses() support: |
613 bool is_old() const { return access_flags().is_old(); } | |
614 void set_is_old() { _access_flags.set_is_old(); } | |
615 bool is_obsolete() const { return access_flags().is_obsolete(); } | |
616 void set_is_obsolete() { _access_flags.set_is_obsolete(); } | |
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617 // see the definition in methodOop.cpp for the gory details |
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618 bool should_not_be_cached() const; |
0 | 619 |
620 // JVMTI Native method prefixing support: | |
621 bool is_prefixed_native() const { return access_flags().is_prefixed_native(); } | |
622 void set_is_prefixed_native() { _access_flags.set_is_prefixed_native(); } | |
623 | |
624 // Rewriting support | |
625 static methodHandle clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length, | |
626 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS); | |
627 | |
628 // Get this method's jmethodID -- allocate if it doesn't exist | |
629 jmethodID jmethod_id() { methodHandle this_h(this); | |
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630 return instanceKlass::get_jmethod_id(method_holder(), this_h); } |
0 | 631 |
632 // Lookup the jmethodID for this method. Return NULL if not found. | |
633 // NOTE that this function can be called from a signal handler | |
634 // (see AsyncGetCallTrace support for Forte Analyzer) and this | |
635 // needs to be async-safe. No allocation should be done and | |
636 // so handles are not used to avoid deadlock. | |
637 jmethodID find_jmethod_id_or_null() { return instanceKlass::cast(method_holder())->jmethod_id_or_null(this); } | |
638 | |
639 // JNI static invoke cached itable index accessors | |
640 int cached_itable_index() { return instanceKlass::cast(method_holder())->cached_itable_index(method_idnum()); } | |
641 void set_cached_itable_index(int index) { instanceKlass::cast(method_holder())->set_cached_itable_index(method_idnum(), index); } | |
642 | |
643 // Support for inlining of intrinsic methods | |
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644 vmIntrinsics::ID intrinsic_id() const { return (vmIntrinsics::ID) _intrinsic_id; } |
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645 void set_intrinsic_id(vmIntrinsics::ID id) { _intrinsic_id = (u1) id; } |
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646 |
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647 // Helper routines for intrinsic_id() and vmIntrinsics::method(). |
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648 void init_intrinsic_id(); // updates from _none if a match |
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649 static vmSymbols::SID klass_id_for_intrinsics(klassOop holder); |
0 | 650 |
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651 bool jfr_towrite() { return _jfr_towrite; } |
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652 void set_jfr_towrite(bool towrite) { _jfr_towrite = towrite; } |
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653 |
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654 bool force_inline() { return _force_inline; } |
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655 void set_force_inline(bool x) { _force_inline = x; } |
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656 bool dont_inline() { return _dont_inline; } |
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657 void set_dont_inline(bool x) { _dont_inline = x; } |
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658 bool is_hidden() { return _hidden; } |
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659 void set_hidden(bool x) { _hidden = x; } |
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660 |
0 | 661 // On-stack replacement support |
1783 | 662 bool has_osr_nmethod(int level, bool match_level) { |
663 return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, InvocationEntryBci, level, match_level) != NULL; | |
664 } | |
665 | |
666 nmethod* lookup_osr_nmethod_for(int bci, int level, bool match_level) { | |
667 return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, bci, level, match_level); | |
668 } | |
0 | 669 |
670 // Inline cache support | |
671 void cleanup_inline_caches(); | |
672 | |
673 // Find if klass for method is loaded | |
674 bool is_klass_loaded_by_klass_index(int klass_index) const; | |
675 bool is_klass_loaded(int refinfo_index, bool must_be_resolved = false) const; | |
676 | |
677 // Indicates whether compilation failed earlier for this method, or | |
678 // whether it is not compilable for another reason like having a | |
679 // breakpoint set in it. | |
1783 | 680 bool is_not_compilable(int comp_level = CompLevel_any) const; |
681 void set_not_compilable(int comp_level = CompLevel_all, bool report = true); | |
682 void set_not_compilable_quietly(int comp_level = CompLevel_all) { | |
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683 set_not_compilable(comp_level, false); |
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684 } |
1783 | 685 bool is_not_osr_compilable(int comp_level = CompLevel_any) const { |
686 return is_not_compilable(comp_level) || access_flags().is_not_osr_compilable(); | |
687 } | |
688 void set_not_osr_compilable() { _access_flags.set_not_osr_compilable(); } | |
689 bool is_not_c1_compilable() const { return access_flags().is_not_c1_compilable(); } | |
690 void set_not_c1_compilable() { _access_flags.set_not_c1_compilable(); } | |
691 bool is_not_c2_compilable() const { return access_flags().is_not_c2_compilable(); } | |
692 void set_not_c2_compilable() { _access_flags.set_not_c2_compilable(); } | |
0 | 693 |
694 // Background compilation support | |
1783 | 695 bool queued_for_compilation() const { return access_flags().queued_for_compilation(); } |
696 void set_queued_for_compilation() { _access_flags.set_queued_for_compilation(); } | |
697 void clear_queued_for_compilation() { _access_flags.clear_queued_for_compilation(); } | |
0 | 698 |
699 // Resolve all classes in signature, return 'true' if successful | |
700 static bool load_signature_classes(methodHandle m, TRAPS); | |
701 | |
702 // Return if true if not all classes references in signature, including return type, has been loaded | |
703 static bool has_unloaded_classes_in_signature(methodHandle m, TRAPS); | |
704 | |
705 // Printing | |
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706 void print_short_name(outputStream* st = tty) /*PRODUCT_RETURN*/; // prints as klassname::methodname; Exposed so field engineers can debug VM |
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707 void print_name(outputStream* st = tty) PRODUCT_RETURN; // prints as "virtual void foo(int)" |
0 | 708 |
709 // Helper routine used for method sorting | |
710 static void sort_methods(objArrayOop methods, | |
711 objArrayOop methods_annotations, | |
712 objArrayOop methods_parameter_annotations, | |
713 objArrayOop methods_default_annotations, | |
714 bool idempotent = false); | |
715 | |
716 // size of parameters | |
717 void set_size_of_parameters(int size) { _size_of_parameters = size; } | |
718 private: | |
719 | |
720 // Inlined elements | |
721 address* native_function_addr() const { assert(is_native(), "must be native"); return (address*) (this+1); } | |
722 address* signature_handler_addr() const { return native_function_addr() + 1; } | |
723 | |
724 // Garbage collection support | |
725 oop* adr_constMethod() const { return (oop*)&_constMethod; } | |
726 oop* adr_method_data() const { return (oop*)&_method_data; } | |
727 }; | |
728 | |
729 | |
730 // Utility class for compressing line number tables | |
731 | |
732 class CompressedLineNumberWriteStream: public CompressedWriteStream { | |
733 private: | |
734 int _bci; | |
735 int _line; | |
736 public: | |
737 // Constructor | |
738 CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {} | |
739 CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {} | |
740 | |
741 // Write (bci, line number) pair to stream | |
742 void write_pair_regular(int bci_delta, int line_delta); | |
743 | |
744 inline void write_pair_inline(int bci, int line) { | |
745 int bci_delta = bci - _bci; | |
746 int line_delta = line - _line; | |
747 _bci = bci; | |
748 _line = line; | |
749 // Skip (0,0) deltas - they do not add information and conflict with terminator. | |
750 if (bci_delta == 0 && line_delta == 0) return; | |
751 // Check if bci is 5-bit and line number 3-bit unsigned. | |
752 if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) { | |
753 // Compress into single byte. | |
754 jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta; | |
755 // Check that value doesn't match escape character. | |
756 if (value != 0xFF) { | |
757 write_byte(value); | |
758 return; | |
759 } | |
760 } | |
761 write_pair_regular(bci_delta, line_delta); | |
762 } | |
763 | |
764 // Windows AMD64 + Apr 2005 PSDK with /O2 generates bad code for write_pair. | |
765 // Disabling optimization doesn't work for methods in header files | |
766 // so we force it to call through the non-optimized version in the .cpp. | |
767 // It's gross, but it's the only way we can ensure that all callers are | |
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768 // fixed. _MSC_VER is defined by the windows compiler |
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769 #if defined(_M_AMD64) && _MSC_VER >= 1400 |
0 | 770 void write_pair(int bci, int line); |
771 #else | |
772 void write_pair(int bci, int line) { write_pair_inline(bci, line); } | |
773 #endif | |
774 | |
775 // Write end-of-stream marker | |
776 void write_terminator() { write_byte(0); } | |
777 }; | |
778 | |
779 | |
780 // Utility class for decompressing line number tables | |
781 | |
782 class CompressedLineNumberReadStream: public CompressedReadStream { | |
783 private: | |
784 int _bci; | |
785 int _line; | |
786 public: | |
787 // Constructor | |
788 CompressedLineNumberReadStream(u_char* buffer); | |
789 // Read (bci, line number) pair from stream. Returns false at end-of-stream. | |
790 bool read_pair(); | |
791 // Accessing bci and line number (after calling read_pair) | |
792 int bci() const { return _bci; } | |
793 int line() const { return _line; } | |
794 }; | |
795 | |
796 | |
797 /// Fast Breakpoints. | |
798 | |
799 // If this structure gets more complicated (because bpts get numerous), | |
800 // move it into its own header. | |
801 | |
802 // There is presently no provision for concurrent access | |
803 // to breakpoint lists, which is only OK for JVMTI because | |
804 // breakpoints are written only at safepoints, and are read | |
805 // concurrently only outside of safepoints. | |
806 | |
6197 | 807 class BreakpointInfo : public CHeapObj<mtClass> { |
0 | 808 friend class VMStructs; |
809 private: | |
810 Bytecodes::Code _orig_bytecode; | |
811 int _bci; | |
812 u2 _name_index; // of method | |
813 u2 _signature_index; // of method | |
814 BreakpointInfo* _next; // simple storage allocation | |
815 | |
816 public: | |
817 BreakpointInfo(methodOop m, int bci); | |
818 | |
819 // accessors | |
820 Bytecodes::Code orig_bytecode() { return _orig_bytecode; } | |
821 void set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; } | |
822 int bci() { return _bci; } | |
823 | |
824 BreakpointInfo* next() const { return _next; } | |
825 void set_next(BreakpointInfo* n) { _next = n; } | |
826 | |
827 // helps for searchers | |
2142 | 828 bool match(const methodOopDesc* m, int bci) { |
0 | 829 return bci == _bci && match(m); |
830 } | |
831 | |
2142 | 832 bool match(const methodOopDesc* m) { |
0 | 833 return _name_index == m->name_index() && |
834 _signature_index == m->signature_index(); | |
835 } | |
836 | |
837 void set(methodOop method); | |
838 void clear(methodOop method); | |
839 }; | |
1972 | 840 |
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841 // Utility class for access exception handlers |
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842 class ExceptionTable : public StackObj { |
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843 private: |
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844 ExceptionTableElement* _table; |
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845 u2 _length; |
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846 |
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847 public: |
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848 ExceptionTable(methodOop m) { |
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849 if (m->has_exception_handler()) { |
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850 _table = m->exception_table_start(); |
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851 _length = m->exception_table_length(); |
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852 } else { |
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853 _table = NULL; |
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854 _length = 0; |
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855 } |
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856 } |
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857 |
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858 int length() const { |
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859 return _length; |
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860 } |
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861 |
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862 u2 start_pc(int idx) const { |
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863 assert(idx < _length, "out of bounds"); |
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864 return _table[idx].start_pc; |
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865 } |
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866 |
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867 void set_start_pc(int idx, u2 value) { |
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868 assert(idx < _length, "out of bounds"); |
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869 _table[idx].start_pc = value; |
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870 } |
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871 |
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872 u2 end_pc(int idx) const { |
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873 assert(idx < _length, "out of bounds"); |
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874 return _table[idx].end_pc; |
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875 } |
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876 |
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877 void set_end_pc(int idx, u2 value) { |
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878 assert(idx < _length, "out of bounds"); |
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879 _table[idx].end_pc = value; |
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880 } |
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881 |
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882 u2 handler_pc(int idx) const { |
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883 assert(idx < _length, "out of bounds"); |
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884 return _table[idx].handler_pc; |
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885 } |
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886 |
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887 void set_handler_pc(int idx, u2 value) { |
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888 assert(idx < _length, "out of bounds"); |
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889 _table[idx].handler_pc = value; |
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890 } |
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891 |
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892 u2 catch_type_index(int idx) const { |
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893 assert(idx < _length, "out of bounds"); |
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894 return _table[idx].catch_type_index; |
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895 } |
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896 |
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897 void set_catch_type_index(int idx, u2 value) { |
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898 assert(idx < _length, "out of bounds"); |
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899 _table[idx].catch_type_index = value; |
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900 } |
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901 }; |
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902 |
1972 | 903 #endif // SHARE_VM_OOPS_METHODOOP_HPP |