Mercurial > hg > truffle
annotate src/share/vm/oops/method.hpp @ 7470:18c3c3fa291b
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author | dlong |
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date | Wed, 09 Jan 2013 21:18:52 -0500 |
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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" | |
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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; |
0 | 104 |
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105 class Method : public Metadata { |
0 | 106 friend class VMStructs; |
107 private: | |
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108 ConstMethod* _constMethod; // Method read-only data. |
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109 MethodData* _method_data; |
1783 | 110 int _interpreter_invocation_count; // Count of times invoked (reused as prev_event_count in tiered) |
0 | 111 AccessFlags _access_flags; // Access flags |
112 int _vtable_index; // vtable index of this method (see VtableIndexFlag) | |
113 // note: can have vtables with >2**16 elements (because of inheritance) | |
114 #ifdef CC_INTERP | |
115 int _result_index; // C++ interpreter needs for converting results to/from stack | |
116 #endif | |
117 u2 _method_size; // size of this object | |
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118 u1 _intrinsic_id; // vmSymbols::intrinsic_id (0 == _none) |
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119 u1 _jfr_towrite : 1, // Flags |
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120 _force_inline : 1, |
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121 _hidden : 1, |
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122 _dont_inline : 1, |
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123 : 4; |
0 | 124 u2 _interpreter_throwout_count; // Count of times method was exited via exception while interpreting |
125 u2 _number_of_breakpoints; // fullspeed debugging support | |
126 InvocationCounter _invocation_counter; // Incremented before each activation of the method - used to trigger frequency-based optimizations | |
127 InvocationCounter _backedge_counter; // Incremented before each backedge taken - used to trigger frequencey-based optimizations | |
1783 | 128 |
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129 #ifdef TIERED |
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130 jlong _prev_time; // Previous time the rate was acquired |
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131 float _rate; // Events (invocation and backedge counter increments) per millisecond |
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132 #endif |
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133 |
0 | 134 #ifndef PRODUCT |
135 int _compiled_invocation_count; // Number of nmethod invocations so far (for perf. debugging) | |
136 #endif | |
137 // Entry point for calling both from and to the interpreter. | |
138 address _i2i_entry; // All-args-on-stack calling convention | |
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139 // Adapter blob (i2c/c2i) for this Method*. Set once when method is linked. |
0 | 140 AdapterHandlerEntry* _adapter; |
141 // Entry point for calling from compiled code, to compiled code if it exists | |
142 // or else the interpreter. | |
143 volatile address _from_compiled_entry; // Cache of: _code ? _code->entry_point() : _adapter->c2i_entry() | |
144 // The entry point for calling both from and to compiled code is | |
145 // "_code->entry_point()". Because of tiered compilation and de-opt, this | |
146 // field can come and go. It can transition from NULL to not-null at any | |
147 // time (whenever a compile completes). It can transition from not-null to | |
148 // NULL only at safepoints (because of a de-opt). | |
149 nmethod* volatile _code; // Points to the corresponding piece of native code | |
150 volatile address _from_interpreted_entry; // Cache of _code ? _adapter->i2c_entry() : _i2i_entry | |
151 | |
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152 // Constructor |
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153 Method(ConstMethod* xconst, AccessFlags access_flags, int size); |
0 | 154 public: |
6934 | 155 |
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156 static Method* allocate(ClassLoaderData* loader_data, |
6934 | 157 int byte_code_size, |
158 AccessFlags access_flags, | |
159 int compressed_line_number_size, | |
160 int localvariable_table_length, | |
161 int exception_table_length, | |
162 int checked_exceptions_length, | |
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163 int method_parameters_length, |
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164 u2 generic_signature_index, |
6934 | 165 ConstMethod::MethodType method_type, |
166 TRAPS); | |
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167 |
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168 // CDS and vtbl checking can create an empty Method to get vtbl pointer. |
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169 Method(){} |
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170 |
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171 // The Method vtable is restored by this call when the Method is in the |
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172 // shared archive. See patch_klass_vtables() in metaspaceShared.cpp for |
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173 // all the gory details. SA, dtrace and pstack helpers distinguish metadata |
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174 // by their vtable. |
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175 void restore_vtable() { guarantee(is_method(), "vtable restored by this call"); } |
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176 bool is_method() const volatile { return true; } |
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177 |
0 | 178 // accessors for instance variables |
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179 |
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180 ConstMethod* constMethod() const { return _constMethod; } |
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181 void set_constMethod(ConstMethod* xconst) { _constMethod = xconst; } |
0 | 182 |
183 | |
184 static address make_adapters(methodHandle mh, TRAPS); | |
185 volatile address from_compiled_entry() const { return (address)OrderAccess::load_ptr_acquire(&_from_compiled_entry); } | |
186 volatile address from_interpreted_entry() const{ return (address)OrderAccess::load_ptr_acquire(&_from_interpreted_entry); } | |
187 | |
188 // access flag | |
189 AccessFlags access_flags() const { return _access_flags; } | |
190 void set_access_flags(AccessFlags flags) { _access_flags = flags; } | |
191 | |
192 // name | |
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193 Symbol* name() const { return constants()->symbol_at(name_index()); } |
0 | 194 int name_index() const { return constMethod()->name_index(); } |
195 void set_name_index(int index) { constMethod()->set_name_index(index); } | |
196 | |
197 // signature | |
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198 Symbol* signature() const { return constants()->symbol_at(signature_index()); } |
0 | 199 int signature_index() const { return constMethod()->signature_index(); } |
200 void set_signature_index(int index) { constMethod()->set_signature_index(index); } | |
201 | |
202 // generics support | |
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203 Symbol* generic_signature() const { int idx = generic_signature_index(); return ((idx != 0) ? constants()->symbol_at(idx) : (Symbol*)NULL); } |
0 | 204 int generic_signature_index() const { return constMethod()->generic_signature_index(); } |
205 void set_generic_signature_index(int index) { constMethod()->set_generic_signature_index(index); } | |
206 | |
207 // annotations support | |
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208 AnnotationArray* annotations() const { |
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209 InstanceKlass* ik = method_holder(); |
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210 if (ik->annotations() == NULL) { |
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211 return NULL; |
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212 } |
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213 return ik->annotations()->get_method_annotations_of(method_idnum()); |
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214 } |
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215 AnnotationArray* parameter_annotations() const { |
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216 InstanceKlass* ik = method_holder(); |
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217 if (ik->annotations() == NULL) { |
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218 return NULL; |
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219 } |
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220 return ik->annotations()->get_method_parameter_annotations_of(method_idnum()); |
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221 } |
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222 AnnotationArray* annotation_default() const { |
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223 InstanceKlass* ik = method_holder(); |
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224 if (ik->annotations() == NULL) { |
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225 return NULL; |
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226 } |
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227 return ik->annotations()->get_method_default_annotations_of(method_idnum()); |
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228 } |
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229 AnnotationArray* type_annotations() const { |
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230 InstanceKlass* ik = method_holder(); |
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231 Annotations* type_annos = ik->type_annotations(); |
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232 if (type_annos == NULL) |
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233 return NULL; |
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234 return type_annos->get_method_annotations_of(method_idnum()); |
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235 } |
0 | 236 |
237 #ifdef CC_INTERP | |
238 void set_result_index(BasicType type); | |
239 int result_index() { return _result_index; } | |
240 #endif | |
241 | |
242 // Helper routine: get klass name + "." + method name + signature as | |
243 // C string, for the purpose of providing more useful NoSuchMethodErrors | |
244 // and fatal error handling. The string is allocated in resource | |
245 // area if a buffer is not provided by the caller. | |
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246 char* name_and_sig_as_C_string() const; |
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247 char* name_and_sig_as_C_string(char* buf, int size) const; |
0 | 248 |
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249 // Static routine in the situations we don't have a Method* |
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250 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature); |
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251 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size); |
0 | 252 |
2142 | 253 Bytecodes::Code java_code_at(int bci) const { |
254 return Bytecodes::java_code_at(this, bcp_from(bci)); | |
255 } | |
256 Bytecodes::Code code_at(int bci) const { | |
257 return Bytecodes::code_at(this, bcp_from(bci)); | |
258 } | |
259 | |
0 | 260 // JVMTI breakpoints |
2142 | 261 Bytecodes::Code orig_bytecode_at(int bci) const; |
0 | 262 void set_orig_bytecode_at(int bci, Bytecodes::Code code); |
263 void set_breakpoint(int bci); | |
264 void clear_breakpoint(int bci); | |
265 void clear_all_breakpoints(); | |
266 // Tracking number of breakpoints, for fullspeed debugging. | |
267 // Only mutated by VM thread. | |
268 u2 number_of_breakpoints() const { return _number_of_breakpoints; } | |
269 void incr_number_of_breakpoints() { ++_number_of_breakpoints; } | |
270 void decr_number_of_breakpoints() { --_number_of_breakpoints; } | |
271 // Initialization only | |
272 void clear_number_of_breakpoints() { _number_of_breakpoints = 0; } | |
273 | |
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274 // index into InstanceKlass methods() array |
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275 // note: also used by jfr |
0 | 276 u2 method_idnum() const { return constMethod()->method_idnum(); } |
277 void set_method_idnum(u2 idnum) { constMethod()->set_method_idnum(idnum); } | |
278 | |
279 // code size | |
280 int code_size() const { return constMethod()->code_size(); } | |
281 | |
282 // method size | |
283 int method_size() const { return _method_size; } | |
284 void set_method_size(int size) { | |
285 assert(0 <= size && size < (1 << 16), "invalid method size"); | |
286 _method_size = size; | |
287 } | |
288 | |
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289 // constant pool for Klass* holding this method |
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290 ConstantPool* constants() const { return constMethod()->constants(); } |
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291 void set_constants(ConstantPool* c) { constMethod()->set_constants(c); } |
0 | 292 |
293 // max stack | |
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294 // return original max stack size for method verification |
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295 int verifier_max_stack() const { return constMethod()->max_stack(); } |
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296 int max_stack() const { return constMethod()->max_stack() + extra_stack_entries(); } |
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297 void set_max_stack(int size) { constMethod()->set_max_stack(size); } |
0 | 298 |
299 // max locals | |
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300 int max_locals() const { return constMethod()->max_locals(); } |
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301 void set_max_locals(int size) { constMethod()->set_max_locals(size); } |
1783 | 302 |
303 int highest_comp_level() const; | |
304 void set_highest_comp_level(int level); | |
305 int highest_osr_comp_level() const; | |
306 void set_highest_osr_comp_level(int level); | |
0 | 307 |
308 // Count of times method was exited via exception while interpreting | |
309 void interpreter_throwout_increment() { | |
310 if (_interpreter_throwout_count < 65534) { | |
311 _interpreter_throwout_count++; | |
312 } | |
313 } | |
314 | |
315 int interpreter_throwout_count() const { return _interpreter_throwout_count; } | |
316 void set_interpreter_throwout_count(int count) { _interpreter_throwout_count = count; } | |
317 | |
318 // size of parameters | |
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319 int size_of_parameters() const { return constMethod()->size_of_parameters(); } |
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320 void set_size_of_parameters(int size) { constMethod()->set_size_of_parameters(size); } |
0 | 321 |
322 bool has_stackmap_table() const { | |
323 return constMethod()->has_stackmap_table(); | |
324 } | |
325 | |
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326 Array<u1>* stackmap_data() const { |
0 | 327 return constMethod()->stackmap_data(); |
328 } | |
329 | |
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330 void set_stackmap_data(Array<u1>* sd) { |
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331 constMethod()->set_stackmap_data(sd); |
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332 } |
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333 |
0 | 334 // exception handler table |
335 bool has_exception_handler() const | |
336 { return constMethod()->has_exception_handler(); } | |
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337 int exception_table_length() const |
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338 { return constMethod()->exception_table_length(); } |
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339 ExceptionTableElement* exception_table_start() const |
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340 { return constMethod()->exception_table_start(); } |
0 | 341 |
342 // Finds the first entry point bci of an exception handler for an | |
343 // exception of klass ex_klass thrown at throw_bci. A value of NULL | |
344 // for ex_klass indicates that the exception klass is not known; in | |
345 // this case it matches any constraint class. Returns -1 if the | |
346 // exception cannot be handled in this method. The handler | |
347 // constraint classes are loaded if necessary. Note that this may | |
348 // throw an exception if loading of the constraint classes causes | |
349 // an IllegalAccessError (bugid 4307310) or an OutOfMemoryError. | |
350 // If an exception is thrown, returns the bci of the | |
351 // exception handler which caused the exception to be thrown, which | |
352 // is needed for proper retries. See, for example, | |
353 // InterpreterRuntime::exception_handler_for_exception. | |
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354 static int fast_exception_handler_bci_for(methodHandle mh, KlassHandle ex_klass, int throw_bci, TRAPS); |
0 | 355 |
356 // method data access | |
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357 MethodData* method_data() const { |
0 | 358 return _method_data; |
359 } | |
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360 void set_method_data(MethodData* data) { |
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361 _method_data = data; |
0 | 362 } |
363 | |
364 // invocation counter | |
1783 | 365 InvocationCounter* invocation_counter() { return &_invocation_counter; } |
366 InvocationCounter* backedge_counter() { return &_backedge_counter; } | |
367 | |
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368 #ifdef TIERED |
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369 // We are reusing interpreter_invocation_count as a holder for the previous event count! |
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370 // We can do that since interpreter_invocation_count is not used in tiered. |
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371 int prev_event_count() const { return _interpreter_invocation_count; } |
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372 void set_prev_event_count(int count) { _interpreter_invocation_count = count; } |
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373 jlong prev_time() const { return _prev_time; } |
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374 void set_prev_time(jlong time) { _prev_time = time; } |
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375 float rate() const { return _rate; } |
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376 void set_rate(float rate) { _rate = rate; } |
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377 #endif |
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378 |
1783 | 379 int invocation_count(); |
380 int backedge_count(); | |
381 | |
382 bool was_executed_more_than(int n); | |
383 bool was_never_executed() { return !was_executed_more_than(0); } | |
0 | 384 |
385 static void build_interpreter_method_data(methodHandle method, TRAPS); | |
386 | |
1783 | 387 int interpreter_invocation_count() { |
388 if (TieredCompilation) return invocation_count(); | |
389 else return _interpreter_invocation_count; | |
390 } | |
0 | 391 void set_interpreter_invocation_count(int count) { _interpreter_invocation_count = count; } |
1783 | 392 int increment_interpreter_invocation_count() { |
393 if (TieredCompilation) ShouldNotReachHere(); | |
394 return ++_interpreter_invocation_count; | |
395 } | |
0 | 396 |
397 #ifndef PRODUCT | |
1783 | 398 int compiled_invocation_count() const { return _compiled_invocation_count; } |
0 | 399 void set_compiled_invocation_count(int count) { _compiled_invocation_count = count; } |
400 #endif // not PRODUCT | |
401 | |
605 | 402 // Clear (non-shared space) pointers which could not be relevant |
0 | 403 // if this (shared) method were mapped into another JVM. |
404 void remove_unshareable_info(); | |
405 | |
406 // nmethod/verified compiler entry | |
407 address verified_code_entry(); | |
408 bool check_code() const; // Not inline to avoid circular ref | |
409 nmethod* volatile code() const { assert( check_code(), "" ); return (nmethod *)OrderAccess::load_ptr_acquire(&_code); } | |
410 void clear_code(); // Clear out any compiled code | |
1202 | 411 static void set_code(methodHandle mh, nmethod* code); |
0 | 412 void set_adapter_entry(AdapterHandlerEntry* adapter) { _adapter = adapter; } |
413 address get_i2c_entry(); | |
414 address get_c2i_entry(); | |
415 address get_c2i_unverified_entry(); | |
416 AdapterHandlerEntry* adapter() { return _adapter; } | |
417 // setup entry points | |
418 void link_method(methodHandle method, TRAPS); | |
419 // clear entry points. Used by sharing code | |
420 void unlink_method(); | |
421 | |
422 // vtable index | |
423 enum VtableIndexFlag { | |
424 // Valid vtable indexes are non-negative (>= 0). | |
425 // These few negative values are used as sentinels. | |
710 | 426 highest_unused_vtable_index_value = -5, |
0 | 427 invalid_vtable_index = -4, // distinct from any valid vtable index |
428 garbage_vtable_index = -3, // not yet linked; no vtable layout yet | |
429 nonvirtual_vtable_index = -2 // there is no need for vtable dispatch | |
430 // 6330203 Note: Do not use -1, which was overloaded with many meanings. | |
431 }; | |
432 DEBUG_ONLY(bool valid_vtable_index() const { return _vtable_index >= nonvirtual_vtable_index; }) | |
433 int vtable_index() const { assert(valid_vtable_index(), ""); | |
434 return _vtable_index; } | |
435 void set_vtable_index(int index) { _vtable_index = index; } | |
436 | |
437 // interpreter entry | |
438 address interpreter_entry() const { return _i2i_entry; } | |
439 // Only used when first initialize so we can set _i2i_entry and _from_interpreted_entry | |
440 void set_interpreter_entry(address entry) { _i2i_entry = entry; _from_interpreted_entry = entry; } | |
441 int interpreter_kind(void) { | |
442 return constMethod()->interpreter_kind(); | |
443 } | |
444 void set_interpreter_kind(); | |
445 void set_interpreter_kind(int kind) { | |
446 constMethod()->set_interpreter_kind(kind); | |
447 } | |
448 | |
449 // native function (used for native methods only) | |
450 enum { | |
451 native_bind_event_is_interesting = true | |
452 }; | |
453 address native_function() const { return *(native_function_addr()); } | |
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454 address critical_native_function(); |
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455 |
0 | 456 // Must specify a real function (not NULL). |
457 // Use clear_native_function() to unregister. | |
458 void set_native_function(address function, bool post_event_flag); | |
459 bool has_native_function() const; | |
460 void clear_native_function(); | |
461 | |
462 // signature handler (used for native methods only) | |
463 address signature_handler() const { return *(signature_handler_addr()); } | |
464 void set_signature_handler(address handler); | |
465 | |
466 // Interpreter oopmap support | |
467 void mask_for(int bci, InterpreterOopMap* mask); | |
468 | |
469 #ifndef PRODUCT | |
470 // operations on invocation counter | |
1783 | 471 void print_invocation_count(); |
0 | 472 #endif |
473 | |
474 // byte codes | |
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475 void set_code(address code) { return constMethod()->set_code(code); } |
0 | 476 address code_base() const { return constMethod()->code_base(); } |
477 bool contains(address bcp) const { return constMethod()->contains(bcp); } | |
478 | |
479 // prints byte codes | |
480 void print_codes() const { print_codes_on(tty); } | |
481 void print_codes_on(outputStream* st) const PRODUCT_RETURN; | |
482 void print_codes_on(int from, int to, outputStream* st) const PRODUCT_RETURN; | |
483 | |
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484 // method parameters |
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485 int method_parameters_length() const |
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486 { return constMethod()->method_parameters_length(); } |
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487 MethodParametersElement* method_parameters_start() const |
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488 { return constMethod()->method_parameters_start(); } |
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489 |
0 | 490 // checked exceptions |
491 int checked_exceptions_length() const | |
492 { return constMethod()->checked_exceptions_length(); } | |
493 CheckedExceptionElement* checked_exceptions_start() const | |
494 { return constMethod()->checked_exceptions_start(); } | |
495 | |
496 // localvariable table | |
497 bool has_localvariable_table() const | |
498 { return constMethod()->has_localvariable_table(); } | |
499 int localvariable_table_length() const | |
500 { return constMethod()->localvariable_table_length(); } | |
501 LocalVariableTableElement* localvariable_table_start() const | |
502 { return constMethod()->localvariable_table_start(); } | |
503 | |
504 bool has_linenumber_table() const | |
505 { return constMethod()->has_linenumber_table(); } | |
506 u_char* compressed_linenumber_table() const | |
507 { return constMethod()->compressed_linenumber_table(); } | |
508 | |
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509 // method holder (the Klass* holding this method) |
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510 InstanceKlass* method_holder() const { return constants()->pool_holder(); } |
0 | 511 |
512 void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments) | |
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513 Symbol* klass_name() const; // returns the name of the method holder |
0 | 514 BasicType result_type() const; // type of the method result |
515 int result_type_index() const; // type index of the method result | |
516 bool is_returning_oop() const { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); } | |
517 bool is_returning_fp() const { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); } | |
518 | |
519 // Checked exceptions thrown by this method (resolved to mirrors) | |
520 objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); } | |
521 | |
522 // Access flags | |
523 bool is_public() const { return access_flags().is_public(); } | |
524 bool is_private() const { return access_flags().is_private(); } | |
525 bool is_protected() const { return access_flags().is_protected(); } | |
526 bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); } | |
527 bool is_static() const { return access_flags().is_static(); } | |
528 bool is_final() const { return access_flags().is_final(); } | |
529 bool is_synchronized() const { return access_flags().is_synchronized();} | |
530 bool is_native() const { return access_flags().is_native(); } | |
531 bool is_abstract() const { return access_flags().is_abstract(); } | |
532 bool is_strict() const { return access_flags().is_strict(); } | |
533 bool is_synthetic() const { return access_flags().is_synthetic(); } | |
534 | |
535 // returns true if contains only return operation | |
536 bool is_empty_method() const; | |
537 | |
538 // returns true if this is a vanilla constructor | |
539 bool is_vanilla_constructor() const; | |
540 | |
541 // checks method and its method holder | |
542 bool is_final_method() const; | |
543 bool is_strict_method() const; | |
544 | |
545 // true if method needs no dynamic dispatch (final and/or no vtable entry) | |
546 bool can_be_statically_bound() const; | |
547 | |
548 // returns true if the method has any backward branches. | |
549 bool has_loops() { | |
550 return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag(); | |
551 }; | |
552 | |
553 bool compute_has_loops_flag(); | |
554 | |
555 bool has_jsrs() { | |
556 return access_flags().has_jsrs(); | |
557 }; | |
558 void set_has_jsrs() { | |
559 _access_flags.set_has_jsrs(); | |
560 } | |
561 | |
562 // returns true if the method has any monitors. | |
563 bool has_monitors() const { return is_synchronized() || access_flags().has_monitor_bytecodes(); } | |
564 bool has_monitor_bytecodes() const { return access_flags().has_monitor_bytecodes(); } | |
565 | |
566 void set_has_monitor_bytecodes() { _access_flags.set_has_monitor_bytecodes(); } | |
567 | |
568 // monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes | |
569 // propererly nest in the method. It might return false, even though they actually nest properly, since the info. | |
570 // has not been computed yet. | |
571 bool guaranteed_monitor_matching() const { return access_flags().is_monitor_matching(); } | |
572 void set_guaranteed_monitor_matching() { _access_flags.set_monitor_matching(); } | |
573 | |
574 // returns true if the method is an accessor function (setter/getter). | |
575 bool is_accessor() const; | |
576 | |
577 // returns true if the method is an initializer (<init> or <clinit>). | |
578 bool is_initializer() const; | |
579 | |
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580 // returns true if the method is static OR if the classfile version < 51 |
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581 bool has_valid_initializer_flags() const; |
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582 |
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583 // returns true if the method name is <clinit> and the method has |
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584 // valid static initializer flags. |
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585 bool is_static_initializer() const; |
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586 |
0 | 587 // compiled code support |
588 // NOTE: code() is inherently racy as deopt can be clearing code | |
589 // simultaneously. Use with caution. | |
590 bool has_compiled_code() const { return code() != NULL; } | |
591 | |
592 // sizing | |
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593 static int header_size() { return sizeof(Method)/HeapWordSize; } |
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594 static int size(bool is_native); |
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595 int size() const { return method_size(); } |
0 | 596 |
597 // interpreter support | |
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598 static ByteSize const_offset() { return byte_offset_of(Method, _constMethod ); } |
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599 static ByteSize access_flags_offset() { return byte_offset_of(Method, _access_flags ); } |
0 | 600 #ifdef CC_INTERP |
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601 static ByteSize result_index_offset() { return byte_offset_of(Method, _result_index ); } |
0 | 602 #endif /* CC_INTERP */ |
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603 static ByteSize from_compiled_offset() { return byte_offset_of(Method, _from_compiled_entry); } |
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604 static ByteSize code_offset() { return byte_offset_of(Method, _code); } |
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605 static ByteSize invocation_counter_offset() { return byte_offset_of(Method, _invocation_counter); } |
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606 static ByteSize backedge_counter_offset() { return byte_offset_of(Method, _backedge_counter); } |
0 | 607 static ByteSize method_data_offset() { |
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608 return byte_offset_of(Method, _method_data); |
0 | 609 } |
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610 static ByteSize interpreter_invocation_counter_offset() { return byte_offset_of(Method, _interpreter_invocation_count); } |
0 | 611 #ifndef PRODUCT |
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612 static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(Method, _compiled_invocation_count); } |
0 | 613 #endif // not PRODUCT |
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614 static ByteSize native_function_offset() { return in_ByteSize(sizeof(Method)); } |
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615 static ByteSize from_interpreted_offset() { return byte_offset_of(Method, _from_interpreted_entry ); } |
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616 static ByteSize interpreter_entry_offset() { return byte_offset_of(Method, _i2i_entry ); } |
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617 static ByteSize signature_handler_offset() { return in_ByteSize(sizeof(Method) + wordSize); } |
0 | 618 |
619 // for code generation | |
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620 static int method_data_offset_in_bytes() { return offset_of(Method, _method_data); } |
0 | 621 static int interpreter_invocation_counter_offset_in_bytes() |
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622 { return offset_of(Method, _interpreter_invocation_count); } |
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623 static int intrinsic_id_offset_in_bytes() { return offset_of(Method, _intrinsic_id); } |
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624 static int intrinsic_id_size_in_bytes() { return sizeof(u1); } |
0 | 625 |
626 // Static methods that are used to implement member methods where an exposed this pointer | |
627 // is needed due to possible GCs | |
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628 static objArrayHandle resolved_checked_exceptions_impl(Method* this_oop, TRAPS); |
0 | 629 |
630 // Returns the byte code index from the byte code pointer | |
631 int bci_from(address bcp) const; | |
632 address bcp_from(int bci) const; | |
633 int validate_bci_from_bcx(intptr_t bcx) const; | |
634 | |
635 // Returns the line number for a bci if debugging information for the method is prowided, | |
636 // -1 is returned otherwise. | |
637 int line_number_from_bci(int bci) const; | |
638 | |
639 // Reflection support | |
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640 bool is_overridden_in(Klass* k) const; |
0 | 641 |
710 | 642 // JSR 292 support |
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643 bool is_method_handle_intrinsic() const; // MethodHandles::is_signature_polymorphic_intrinsic(intrinsic_id) |
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644 bool is_compiled_lambda_form() const; // intrinsic_id() == vmIntrinsics::_compiledLambdaForm |
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645 bool has_member_arg() const; // intrinsic_id() == vmIntrinsics::_linkToSpecial, etc. |
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646 static methodHandle make_method_handle_intrinsic(vmIntrinsics::ID iid, // _invokeBasic, _linkToVirtual |
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647 Symbol* signature, //anything at all |
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648 TRAPS); |
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649 static Klass* check_non_bcp_klass(Klass* klass); |
710 | 650 // these operate only on invoke methods: |
651 // presize interpreter frames for extra interpreter stack entries, if needed | |
726
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652 // method handles want to be able to push a few extra values (e.g., a bound receiver), and |
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653 // invokedynamic sometimes needs to push a bootstrap method, call site, and arglist, |
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654 // all without checking for a stack overflow |
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655 static int extra_stack_entries() { return EnableInvokeDynamic ? 2 : 0; } |
710 | 656 static int extra_stack_words(); // = extra_stack_entries() * Interpreter::stackElementSize() |
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657 |
0 | 658 // RedefineClasses() support: |
659 bool is_old() const { return access_flags().is_old(); } | |
660 void set_is_old() { _access_flags.set_is_old(); } | |
661 bool is_obsolete() const { return access_flags().is_obsolete(); } | |
662 void set_is_obsolete() { _access_flags.set_is_obsolete(); } | |
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663 bool on_stack() const { return access_flags().on_stack(); } |
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664 void set_on_stack(const bool value); |
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665 |
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666 // see the definition in Method*.cpp for the gory details |
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667 bool should_not_be_cached() const; |
0 | 668 |
669 // JVMTI Native method prefixing support: | |
670 bool is_prefixed_native() const { return access_flags().is_prefixed_native(); } | |
671 void set_is_prefixed_native() { _access_flags.set_is_prefixed_native(); } | |
672 | |
673 // Rewriting support | |
674 static methodHandle clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length, | |
675 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS); | |
676 | |
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677 // jmethodID handling |
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678 // Because the useful life-span of a jmethodID cannot be determined, |
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679 // once created they are never reclaimed. The methods to which they refer, |
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680 // however, can be GC'ed away if the class is unloaded or if the method is |
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681 // made obsolete or deleted -- in these cases, the jmethodID |
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682 // refers to NULL (as is the case for any weak reference). |
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683 static jmethodID make_jmethod_id(ClassLoaderData* loader_data, Method* mh); |
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684 static void destroy_jmethod_id(ClassLoaderData* loader_data, jmethodID mid); |
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685 |
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686 // Use resolve_jmethod_id() in situations where the caller is expected |
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687 // to provide a valid jmethodID; the only sanity checks are in asserts; |
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688 // result guaranteed not to be NULL. |
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689 inline static Method* resolve_jmethod_id(jmethodID mid) { |
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690 assert(mid != NULL, "JNI method id should not be null"); |
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691 return *((Method**)mid); |
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692 } |
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693 |
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694 // Use checked_resolve_jmethod_id() in situations where the caller |
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695 // should provide a valid jmethodID, but might not. NULL is returned |
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696 // when the jmethodID does not refer to a valid method. |
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697 static Method* checked_resolve_jmethod_id(jmethodID mid); |
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698 |
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699 static void change_method_associated_with_jmethod_id(jmethodID old_jmid_ptr, Method* new_method); |
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700 static bool is_method_id(jmethodID mid); |
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701 |
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702 // Clear methods |
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703 static void clear_jmethod_ids(ClassLoaderData* loader_data); |
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704 static void print_jmethod_ids(ClassLoaderData* loader_data, outputStream* out) PRODUCT_RETURN; |
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705 |
0 | 706 // Get this method's jmethodID -- allocate if it doesn't exist |
707 jmethodID jmethod_id() { methodHandle this_h(this); | |
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708 return InstanceKlass::get_jmethod_id(method_holder(), this_h); } |
0 | 709 |
710 // Lookup the jmethodID for this method. Return NULL if not found. | |
711 // NOTE that this function can be called from a signal handler | |
712 // (see AsyncGetCallTrace support for Forte Analyzer) and this | |
713 // needs to be async-safe. No allocation should be done and | |
714 // so handles are not used to avoid deadlock. | |
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715 jmethodID find_jmethod_id_or_null() { return method_holder()->jmethod_id_or_null(this); } |
0 | 716 |
717 // JNI static invoke cached itable index accessors | |
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718 int cached_itable_index() { return method_holder()->cached_itable_index(method_idnum()); } |
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719 void set_cached_itable_index(int index) { method_holder()->set_cached_itable_index(method_idnum(), index); } |
0 | 720 |
721 // Support for inlining of intrinsic methods | |
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722 vmIntrinsics::ID intrinsic_id() const { return (vmIntrinsics::ID) _intrinsic_id; } |
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723 void set_intrinsic_id(vmIntrinsics::ID id) { _intrinsic_id = (u1) id; } |
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724 |
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725 // Helper routines for intrinsic_id() and vmIntrinsics::method(). |
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726 void init_intrinsic_id(); // updates from _none if a match |
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727 static vmSymbols::SID klass_id_for_intrinsics(Klass* holder); |
0 | 728 |
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729 bool jfr_towrite() { return _jfr_towrite; } |
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730 void set_jfr_towrite(bool towrite) { _jfr_towrite = towrite; } |
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731 |
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732 bool force_inline() { return _force_inline; } |
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733 void set_force_inline(bool x) { _force_inline = x; } |
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734 bool dont_inline() { return _dont_inline; } |
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735 void set_dont_inline(bool x) { _dont_inline = x; } |
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736 bool is_hidden() { return _hidden; } |
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737 void set_hidden(bool x) { _hidden = x; } |
6934 | 738 ConstMethod::MethodType method_type() const { |
739 return _constMethod->method_type(); | |
740 } | |
741 bool is_overpass() const { return method_type() == ConstMethod::OVERPASS; } | |
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742 |
0 | 743 // On-stack replacement support |
1783 | 744 bool has_osr_nmethod(int level, bool match_level) { |
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745 return method_holder()->lookup_osr_nmethod(this, InvocationEntryBci, level, match_level) != NULL; |
1783 | 746 } |
747 | |
748 nmethod* lookup_osr_nmethod_for(int bci, int level, bool match_level) { | |
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749 return method_holder()->lookup_osr_nmethod(this, bci, level, match_level); |
1783 | 750 } |
0 | 751 |
752 // Inline cache support | |
753 void cleanup_inline_caches(); | |
754 | |
755 // Find if klass for method is loaded | |
756 bool is_klass_loaded_by_klass_index(int klass_index) const; | |
757 bool is_klass_loaded(int refinfo_index, bool must_be_resolved = false) const; | |
758 | |
759 // Indicates whether compilation failed earlier for this method, or | |
760 // whether it is not compilable for another reason like having a | |
761 // breakpoint set in it. | |
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762 bool is_not_compilable(int comp_level = CompLevel_any) const; |
1783 | 763 void set_not_compilable(int comp_level = CompLevel_all, bool report = true); |
764 void set_not_compilable_quietly(int comp_level = CompLevel_all) { | |
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765 set_not_compilable(comp_level, false); |
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766 } |
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767 bool is_not_osr_compilable(int comp_level = CompLevel_any) const; |
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768 void set_not_osr_compilable(int comp_level = CompLevel_all, bool report = true); |
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769 void set_not_osr_compilable_quietly(int comp_level = CompLevel_all) { |
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770 set_not_osr_compilable(comp_level, false); |
1783 | 771 } |
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772 |
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773 private: |
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774 void print_made_not_compilable(int comp_level, bool is_osr, bool report); |
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775 |
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776 public: |
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777 bool is_not_c1_compilable() const { return access_flags().is_not_c1_compilable(); } |
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778 void set_not_c1_compilable() { _access_flags.set_not_c1_compilable(); } |
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779 bool is_not_c2_compilable() const { return access_flags().is_not_c2_compilable(); } |
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780 void set_not_c2_compilable() { _access_flags.set_not_c2_compilable(); } |
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781 |
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782 bool is_not_c1_osr_compilable() const { return is_not_c1_compilable(); } // don't waste an accessFlags bit |
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783 void set_not_c1_osr_compilable() { set_not_c1_compilable(); } // don't waste an accessFlags bit |
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784 bool is_not_c2_osr_compilable() const { return access_flags().is_not_c2_osr_compilable(); } |
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785 void set_not_c2_osr_compilable() { _access_flags.set_not_c2_osr_compilable(); } |
0 | 786 |
787 // Background compilation support | |
1783 | 788 bool queued_for_compilation() const { return access_flags().queued_for_compilation(); } |
789 void set_queued_for_compilation() { _access_flags.set_queued_for_compilation(); } | |
790 void clear_queued_for_compilation() { _access_flags.clear_queued_for_compilation(); } | |
0 | 791 |
792 // Resolve all classes in signature, return 'true' if successful | |
793 static bool load_signature_classes(methodHandle m, TRAPS); | |
794 | |
795 // Return if true if not all classes references in signature, including return type, has been loaded | |
796 static bool has_unloaded_classes_in_signature(methodHandle m, TRAPS); | |
797 | |
798 // Printing | |
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799 void print_short_name(outputStream* st = tty) /*PRODUCT_RETURN*/; // prints as klassname::methodname; Exposed so field engineers can debug VM |
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800 void print_name(outputStream* st = tty) PRODUCT_RETURN; // prints as "virtual void foo(int)" |
0 | 801 |
802 // Helper routine used for method sorting | |
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803 static void sort_methods(Array<Method*>* methods, |
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804 Array<AnnotationArray*>* methods_annotations, |
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805 Array<AnnotationArray*>* methods_parameter_annotations, |
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806 Array<AnnotationArray*>* methods_default_annotations, |
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807 Array<AnnotationArray*>* methods_type_annotations, |
0 | 808 bool idempotent = false); |
809 | |
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810 // Deallocation function for redefine classes or if an error occurs |
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811 void deallocate_contents(ClassLoaderData* loader_data); |
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812 |
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813 // Printing |
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814 #ifndef PRODUCT |
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815 void print_on(outputStream* st) const; |
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816 #endif |
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817 void print_value_on(outputStream* st) const; |
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818 |
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819 const char* internal_name() const { return "{method}"; } |
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820 |
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821 // Check for valid method pointer |
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822 bool is_valid_method() const; |
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823 |
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824 // Verify |
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825 void verify() { verify_on(tty); } |
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826 void verify_on(outputStream* st); |
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827 |
0 | 828 private: |
829 | |
830 // Inlined elements | |
831 address* native_function_addr() const { assert(is_native(), "must be native"); return (address*) (this+1); } | |
832 address* signature_handler_addr() const { return native_function_addr() + 1; } | |
833 }; | |
834 | |
835 | |
836 // Utility class for compressing line number tables | |
837 | |
838 class CompressedLineNumberWriteStream: public CompressedWriteStream { | |
839 private: | |
840 int _bci; | |
841 int _line; | |
842 public: | |
843 // Constructor | |
844 CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {} | |
845 CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {} | |
846 | |
847 // Write (bci, line number) pair to stream | |
848 void write_pair_regular(int bci_delta, int line_delta); | |
849 | |
850 inline void write_pair_inline(int bci, int line) { | |
851 int bci_delta = bci - _bci; | |
852 int line_delta = line - _line; | |
853 _bci = bci; | |
854 _line = line; | |
855 // Skip (0,0) deltas - they do not add information and conflict with terminator. | |
856 if (bci_delta == 0 && line_delta == 0) return; | |
857 // Check if bci is 5-bit and line number 3-bit unsigned. | |
858 if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) { | |
859 // Compress into single byte. | |
860 jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta; | |
861 // Check that value doesn't match escape character. | |
862 if (value != 0xFF) { | |
863 write_byte(value); | |
864 return; | |
865 } | |
866 } | |
867 write_pair_regular(bci_delta, line_delta); | |
868 } | |
869 | |
870 // Windows AMD64 + Apr 2005 PSDK with /O2 generates bad code for write_pair. | |
871 // Disabling optimization doesn't work for methods in header files | |
872 // so we force it to call through the non-optimized version in the .cpp. | |
873 // It's gross, but it's the only way we can ensure that all callers are | |
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874 // fixed. _MSC_VER is defined by the windows compiler |
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875 #if defined(_M_AMD64) && _MSC_VER >= 1400 |
0 | 876 void write_pair(int bci, int line); |
877 #else | |
878 void write_pair(int bci, int line) { write_pair_inline(bci, line); } | |
879 #endif | |
880 | |
881 // Write end-of-stream marker | |
882 void write_terminator() { write_byte(0); } | |
883 }; | |
884 | |
885 | |
886 // Utility class for decompressing line number tables | |
887 | |
888 class CompressedLineNumberReadStream: public CompressedReadStream { | |
889 private: | |
890 int _bci; | |
891 int _line; | |
892 public: | |
893 // Constructor | |
894 CompressedLineNumberReadStream(u_char* buffer); | |
895 // Read (bci, line number) pair from stream. Returns false at end-of-stream. | |
896 bool read_pair(); | |
897 // Accessing bci and line number (after calling read_pair) | |
898 int bci() const { return _bci; } | |
899 int line() const { return _line; } | |
900 }; | |
901 | |
902 | |
903 /// Fast Breakpoints. | |
904 | |
905 // If this structure gets more complicated (because bpts get numerous), | |
906 // move it into its own header. | |
907 | |
908 // There is presently no provision for concurrent access | |
909 // to breakpoint lists, which is only OK for JVMTI because | |
910 // breakpoints are written only at safepoints, and are read | |
911 // concurrently only outside of safepoints. | |
912 | |
6197 | 913 class BreakpointInfo : public CHeapObj<mtClass> { |
0 | 914 friend class VMStructs; |
915 private: | |
916 Bytecodes::Code _orig_bytecode; | |
917 int _bci; | |
918 u2 _name_index; // of method | |
919 u2 _signature_index; // of method | |
920 BreakpointInfo* _next; // simple storage allocation | |
921 | |
922 public: | |
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923 BreakpointInfo(Method* m, int bci); |
0 | 924 |
925 // accessors | |
926 Bytecodes::Code orig_bytecode() { return _orig_bytecode; } | |
927 void set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; } | |
928 int bci() { return _bci; } | |
929 | |
930 BreakpointInfo* next() const { return _next; } | |
931 void set_next(BreakpointInfo* n) { _next = n; } | |
932 | |
933 // helps for searchers | |
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934 bool match(const Method* m, int bci) { |
0 | 935 return bci == _bci && match(m); |
936 } | |
937 | |
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938 bool match(const Method* m) { |
0 | 939 return _name_index == m->name_index() && |
940 _signature_index == m->signature_index(); | |
941 } | |
942 | |
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943 void set(Method* method); |
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944 void clear(Method* method); |
0 | 945 }; |
1972 | 946 |
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947 // Utility class for access exception handlers |
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948 class ExceptionTable : public StackObj { |
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949 private: |
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950 ExceptionTableElement* _table; |
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951 u2 _length; |
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952 |
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953 public: |
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954 ExceptionTable(Method* m) { |
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955 if (m->has_exception_handler()) { |
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956 _table = m->exception_table_start(); |
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957 _length = m->exception_table_length(); |
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958 } else { |
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959 _table = NULL; |
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960 _length = 0; |
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961 } |
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962 } |
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963 |
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964 int length() const { |
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965 return _length; |
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966 } |
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967 |
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968 u2 start_pc(int idx) const { |
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969 assert(idx < _length, "out of bounds"); |
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970 return _table[idx].start_pc; |
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971 } |
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972 |
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973 void set_start_pc(int idx, u2 value) { |
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974 assert(idx < _length, "out of bounds"); |
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975 _table[idx].start_pc = value; |
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976 } |
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977 |
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978 u2 end_pc(int idx) const { |
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979 assert(idx < _length, "out of bounds"); |
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980 return _table[idx].end_pc; |
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981 } |
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982 |
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983 void set_end_pc(int idx, u2 value) { |
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984 assert(idx < _length, "out of bounds"); |
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985 _table[idx].end_pc = value; |
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986 } |
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987 |
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988 u2 handler_pc(int idx) const { |
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989 assert(idx < _length, "out of bounds"); |
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990 return _table[idx].handler_pc; |
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991 } |
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992 |
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993 void set_handler_pc(int idx, u2 value) { |
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994 assert(idx < _length, "out of bounds"); |
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995 _table[idx].handler_pc = value; |
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996 } |
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997 |
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998 u2 catch_type_index(int idx) const { |
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999 assert(idx < _length, "out of bounds"); |
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1000 return _table[idx].catch_type_index; |
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1001 } |
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1002 |
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1003 void set_catch_type_index(int idx, u2 value) { |
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1004 assert(idx < _length, "out of bounds"); |
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1005 _table[idx].catch_type_index = value; |
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1006 } |
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1007 }; |
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1008 |
1972 | 1009 #endif // SHARE_VM_OOPS_METHODOOP_HPP |