Mercurial > hg > truffle
annotate src/share/vm/oops/method.hpp @ 6862:8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
Summary: Change the type of various task num fields, parameters etc to unsigned and rename them to be more consistent with the other collectors. Code changes were also reviewed by Vitaly Davidovich.
Reviewed-by: johnc
Contributed-by: Kaushik Srenevasan <kaushik@twitter.com>
author | johnc |
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date | Sat, 06 Oct 2012 01:17:44 -0700 |
parents | 9191895df19d |
children | 4735d2c84362 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #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/constMethod.hpp" |
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34 #include "oops/constantPool.hpp" |
1972 | 35 #include "oops/instanceKlass.hpp" |
36 #include "oops/oop.hpp" | |
37 #include "oops/typeArrayOop.hpp" | |
38 #include "utilities/accessFlags.hpp" | |
39 #include "utilities/growableArray.hpp" | |
40 | |
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41 // A Method* represents a Java method. |
0 | 42 // |
43 // Memory layout (each line represents a word). Note that most applications load thousands of methods, | |
44 // so keeping the size of this structure small has a big impact on footprint. | |
45 // | |
46 // We put all oops and method_size first for better gc cache locality. | |
47 // | |
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48 // The actual bytecodes are inlined after the end of the Method struct. |
0 | 49 // |
50 // There are bits in the access_flags telling whether inlined tables are present. | |
51 // Note that accessing the line number and local variable tables is not performance critical at all. | |
52 // Accessing the checked exceptions table is used by reflection, so we put that last to make access | |
53 // to it fast. | |
54 // | |
55 // The line number table is compressed and inlined following the byte codes. It is found as the first | |
56 // byte following the byte codes. The checked exceptions table and the local variable table are inlined | |
57 // after the line number table, and indexed from the end of the method. We do not compress the checked | |
58 // exceptions table since the average length is less than 2, and do not bother to compress the local | |
59 // variable table either since it is mostly absent. | |
60 // | |
61 // Note that native_function and signature_handler has to be at fixed offsets (required by the interpreter) | |
62 // | |
63 // |------------------------------------------------------| | |
64 // | header | | |
65 // | klass | | |
66 // |------------------------------------------------------| | |
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67 // | ConstMethod* (oop) | |
0 | 68 // |------------------------------------------------------| |
69 // | methodData (oop) | | |
70 // | interp_invocation_count | | |
71 // |------------------------------------------------------| | |
72 // | access_flags | | |
73 // | vtable_index | | |
74 // |------------------------------------------------------| | |
75 // | result_index (C++ interpreter only) | | |
76 // |------------------------------------------------------| | |
77 // | method_size | max_stack | | |
78 // | max_locals | size_of_parameters | | |
79 // |------------------------------------------------------| | |
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80 // |intrinsic_id| flags | throwout_count | |
0 | 81 // |------------------------------------------------------| |
1783 | 82 // | num_breakpoints | (unused) | |
0 | 83 // |------------------------------------------------------| |
84 // | invocation_counter | | |
85 // | backedge_counter | | |
86 // |------------------------------------------------------| | |
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87 // | prev_time (tiered only, 64 bit wide) | |
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88 // | | |
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89 // |------------------------------------------------------| |
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90 // | rate (tiered) | |
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91 // |------------------------------------------------------| |
0 | 92 // | code (pointer) | |
93 // | i2i (pointer) | | |
94 // | adapter (pointer) | | |
95 // | from_compiled_entry (pointer) | | |
96 // | from_interpreted_entry (pointer) | | |
97 // |------------------------------------------------------| | |
98 // | native_function (present only if native) | | |
99 // | signature_handler (present only if native) | | |
100 // |------------------------------------------------------| | |
101 | |
102 | |
103 class CheckedExceptionElement; | |
104 class LocalVariableTableElement; | |
105 class AdapterHandlerEntry; | |
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106 class MethodData; |
0 | 107 |
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108 class Method : public Metadata { |
0 | 109 friend class VMStructs; |
110 private: | |
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111 ConstMethod* _constMethod; // Method read-only data. |
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112 MethodData* _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 | |
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145 // Adapter blob (i2c/c2i) for this Method*. Set once when method is linked. |
0 | 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 | |
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158 // Constructor |
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159 Method(ConstMethod* xconst, AccessFlags access_flags, int size); |
0 | 160 public: |
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161 static Method* allocate(ClassLoaderData* loader_data, |
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162 int byte_code_size, |
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163 AccessFlags access_flags, |
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164 int compressed_line_number_size, |
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165 int localvariable_table_length, |
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166 int exception_table_length, |
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167 int checked_exceptions_length, |
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168 TRAPS); |
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169 |
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170 Method() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); } |
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171 |
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172 // The Method vtable is restored by this call when the Method is in the |
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173 // shared archive. See patch_klass_vtables() in metaspaceShared.cpp for |
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174 // all the gory details. SA, dtrace and pstack helpers distinguish metadata |
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175 // by their vtable. |
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176 void restore_vtable() { guarantee(is_method(), "vtable restored by this call"); } |
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177 bool is_method() const volatile { return true; } |
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178 |
0 | 179 // accessors for instance variables |
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180 |
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181 ConstMethod* constMethod() const { return _constMethod; } |
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182 void set_constMethod(ConstMethod* xconst) { _constMethod = xconst; } |
0 | 183 |
184 | |
185 static address make_adapters(methodHandle mh, TRAPS); | |
186 volatile address from_compiled_entry() const { return (address)OrderAccess::load_ptr_acquire(&_from_compiled_entry); } | |
187 volatile address from_interpreted_entry() const{ return (address)OrderAccess::load_ptr_acquire(&_from_interpreted_entry); } | |
188 | |
189 // access flag | |
190 AccessFlags access_flags() const { return _access_flags; } | |
191 void set_access_flags(AccessFlags flags) { _access_flags = flags; } | |
192 | |
193 // name | |
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194 Symbol* name() const { return constants()->symbol_at(name_index()); } |
0 | 195 int name_index() const { return constMethod()->name_index(); } |
196 void set_name_index(int index) { constMethod()->set_name_index(index); } | |
197 | |
198 // signature | |
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199 Symbol* signature() const { return constants()->symbol_at(signature_index()); } |
0 | 200 int signature_index() const { return constMethod()->signature_index(); } |
201 void set_signature_index(int index) { constMethod()->set_signature_index(index); } | |
202 | |
203 // generics support | |
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204 Symbol* generic_signature() const { int idx = generic_signature_index(); return ((idx != 0) ? constants()->symbol_at(idx) : (Symbol*)NULL); } |
0 | 205 int generic_signature_index() const { return constMethod()->generic_signature_index(); } |
206 void set_generic_signature_index(int index) { constMethod()->set_generic_signature_index(index); } | |
207 | |
208 // annotations support | |
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209 AnnotationArray* annotations() const { |
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210 InstanceKlass* ik = InstanceKlass::cast(method_holder()); |
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211 if (ik->annotations() == NULL) { |
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212 return NULL; |
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213 } |
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214 return ik->annotations()->get_method_annotations_of(method_idnum()); |
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215 } |
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216 AnnotationArray* parameter_annotations() const { |
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217 InstanceKlass* ik = InstanceKlass::cast(method_holder()); |
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218 if (ik->annotations() == NULL) { |
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219 return NULL; |
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220 } |
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221 return ik->annotations()->get_method_parameter_annotations_of(method_idnum()); |
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222 } |
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223 AnnotationArray* annotation_default() const { |
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224 InstanceKlass* ik = InstanceKlass::cast(method_holder()); |
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225 if (ik->annotations() == NULL) { |
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226 return NULL; |
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227 } |
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228 return ik->annotations()->get_method_default_annotations_of(method_idnum()); |
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229 } |
0 | 230 |
231 #ifdef CC_INTERP | |
232 void set_result_index(BasicType type); | |
233 int result_index() { return _result_index; } | |
234 #endif | |
235 | |
236 // Helper routine: get klass name + "." + method name + signature as | |
237 // C string, for the purpose of providing more useful NoSuchMethodErrors | |
238 // and fatal error handling. The string is allocated in resource | |
239 // area if a buffer is not provided by the caller. | |
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240 char* name_and_sig_as_C_string() const; |
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241 char* name_and_sig_as_C_string(char* buf, int size) const; |
0 | 242 |
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243 // Static routine in the situations we don't have a Method* |
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244 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature); |
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245 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size); |
0 | 246 |
2142 | 247 Bytecodes::Code java_code_at(int bci) const { |
248 return Bytecodes::java_code_at(this, bcp_from(bci)); | |
249 } | |
250 Bytecodes::Code code_at(int bci) const { | |
251 return Bytecodes::code_at(this, bcp_from(bci)); | |
252 } | |
253 | |
0 | 254 // JVMTI breakpoints |
2142 | 255 Bytecodes::Code orig_bytecode_at(int bci) const; |
0 | 256 void set_orig_bytecode_at(int bci, Bytecodes::Code code); |
257 void set_breakpoint(int bci); | |
258 void clear_breakpoint(int bci); | |
259 void clear_all_breakpoints(); | |
260 // Tracking number of breakpoints, for fullspeed debugging. | |
261 // Only mutated by VM thread. | |
262 u2 number_of_breakpoints() const { return _number_of_breakpoints; } | |
263 void incr_number_of_breakpoints() { ++_number_of_breakpoints; } | |
264 void decr_number_of_breakpoints() { --_number_of_breakpoints; } | |
265 // Initialization only | |
266 void clear_number_of_breakpoints() { _number_of_breakpoints = 0; } | |
267 | |
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268 // index into InstanceKlass methods() array |
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269 // note: also used by jfr |
0 | 270 u2 method_idnum() const { return constMethod()->method_idnum(); } |
271 void set_method_idnum(u2 idnum) { constMethod()->set_method_idnum(idnum); } | |
272 | |
273 // code size | |
274 int code_size() const { return constMethod()->code_size(); } | |
275 | |
276 // method size | |
277 int method_size() const { return _method_size; } | |
278 void set_method_size(int size) { | |
279 assert(0 <= size && size < (1 << 16), "invalid method size"); | |
280 _method_size = size; | |
281 } | |
282 | |
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283 // constant pool for Klass* holding this method |
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284 ConstantPool* constants() const { return constMethod()->constants(); } |
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285 void set_constants(ConstantPool* c) { constMethod()->set_constants(c); } |
0 | 286 |
287 // max stack | |
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288 // return original max stack size for method verification |
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289 int verifier_max_stack() const { return _max_stack; } |
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290 int max_stack() const { return _max_stack + extra_stack_entries(); } |
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291 void set_max_stack(int size) { _max_stack = size; } |
0 | 292 |
293 // max locals | |
294 int max_locals() const { return _max_locals; } | |
295 void set_max_locals(int size) { _max_locals = size; } | |
1783 | 296 |
297 int highest_comp_level() const; | |
298 void set_highest_comp_level(int level); | |
299 int highest_osr_comp_level() const; | |
300 void set_highest_osr_comp_level(int level); | |
0 | 301 |
302 // Count of times method was exited via exception while interpreting | |
303 void interpreter_throwout_increment() { | |
304 if (_interpreter_throwout_count < 65534) { | |
305 _interpreter_throwout_count++; | |
306 } | |
307 } | |
308 | |
309 int interpreter_throwout_count() const { return _interpreter_throwout_count; } | |
310 void set_interpreter_throwout_count(int count) { _interpreter_throwout_count = count; } | |
311 | |
312 // size of parameters | |
313 int size_of_parameters() const { return _size_of_parameters; } | |
314 | |
315 bool has_stackmap_table() const { | |
316 return constMethod()->has_stackmap_table(); | |
317 } | |
318 | |
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319 Array<u1>* stackmap_data() const { |
0 | 320 return constMethod()->stackmap_data(); |
321 } | |
322 | |
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323 void set_stackmap_data(Array<u1>* sd) { |
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324 constMethod()->set_stackmap_data(sd); |
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325 } |
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326 |
0 | 327 // exception handler table |
328 bool has_exception_handler() const | |
329 { return constMethod()->has_exception_handler(); } | |
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330 int exception_table_length() const |
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331 { return constMethod()->exception_table_length(); } |
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332 ExceptionTableElement* exception_table_start() const |
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333 { return constMethod()->exception_table_start(); } |
0 | 334 |
335 // Finds the first entry point bci of an exception handler for an | |
336 // exception of klass ex_klass thrown at throw_bci. A value of NULL | |
337 // for ex_klass indicates that the exception klass is not known; in | |
338 // this case it matches any constraint class. Returns -1 if the | |
339 // exception cannot be handled in this method. The handler | |
340 // constraint classes are loaded if necessary. Note that this may | |
341 // throw an exception if loading of the constraint classes causes | |
342 // an IllegalAccessError (bugid 4307310) or an OutOfMemoryError. | |
343 // If an exception is thrown, returns the bci of the | |
344 // exception handler which caused the exception to be thrown, which | |
345 // is needed for proper retries. See, for example, | |
346 // InterpreterRuntime::exception_handler_for_exception. | |
347 int fast_exception_handler_bci_for(KlassHandle ex_klass, int throw_bci, TRAPS); | |
348 | |
349 // method data access | |
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350 MethodData* method_data() const { |
0 | 351 return _method_data; |
352 } | |
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353 void set_method_data(MethodData* data) { |
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354 _method_data = data; |
0 | 355 } |
356 | |
357 // invocation counter | |
1783 | 358 InvocationCounter* invocation_counter() { return &_invocation_counter; } |
359 InvocationCounter* backedge_counter() { return &_backedge_counter; } | |
360 | |
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361 #ifdef TIERED |
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362 // We are reusing interpreter_invocation_count as a holder for the previous event count! |
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363 // We can do that since interpreter_invocation_count is not used in tiered. |
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364 int prev_event_count() const { return _interpreter_invocation_count; } |
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365 void set_prev_event_count(int count) { _interpreter_invocation_count = count; } |
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366 jlong prev_time() const { return _prev_time; } |
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367 void set_prev_time(jlong time) { _prev_time = time; } |
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368 float rate() const { return _rate; } |
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369 void set_rate(float rate) { _rate = rate; } |
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370 #endif |
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371 |
1783 | 372 int invocation_count(); |
373 int backedge_count(); | |
374 | |
375 bool was_executed_more_than(int n); | |
376 bool was_never_executed() { return !was_executed_more_than(0); } | |
0 | 377 |
378 static void build_interpreter_method_data(methodHandle method, TRAPS); | |
379 | |
1783 | 380 int interpreter_invocation_count() { |
381 if (TieredCompilation) return invocation_count(); | |
382 else return _interpreter_invocation_count; | |
383 } | |
0 | 384 void set_interpreter_invocation_count(int count) { _interpreter_invocation_count = count; } |
1783 | 385 int increment_interpreter_invocation_count() { |
386 if (TieredCompilation) ShouldNotReachHere(); | |
387 return ++_interpreter_invocation_count; | |
388 } | |
0 | 389 |
390 #ifndef PRODUCT | |
1783 | 391 int compiled_invocation_count() const { return _compiled_invocation_count; } |
0 | 392 void set_compiled_invocation_count(int count) { _compiled_invocation_count = count; } |
393 #endif // not PRODUCT | |
394 | |
605 | 395 // Clear (non-shared space) pointers which could not be relevant |
0 | 396 // if this (shared) method were mapped into another JVM. |
397 void remove_unshareable_info(); | |
398 | |
399 // nmethod/verified compiler entry | |
400 address verified_code_entry(); | |
401 bool check_code() const; // Not inline to avoid circular ref | |
402 nmethod* volatile code() const { assert( check_code(), "" ); return (nmethod *)OrderAccess::load_ptr_acquire(&_code); } | |
403 void clear_code(); // Clear out any compiled code | |
1202 | 404 static void set_code(methodHandle mh, nmethod* code); |
0 | 405 void set_adapter_entry(AdapterHandlerEntry* adapter) { _adapter = adapter; } |
406 address get_i2c_entry(); | |
407 address get_c2i_entry(); | |
408 address get_c2i_unverified_entry(); | |
409 AdapterHandlerEntry* adapter() { return _adapter; } | |
410 // setup entry points | |
411 void link_method(methodHandle method, TRAPS); | |
412 // clear entry points. Used by sharing code | |
413 void unlink_method(); | |
414 | |
415 // vtable index | |
416 enum VtableIndexFlag { | |
417 // Valid vtable indexes are non-negative (>= 0). | |
418 // These few negative values are used as sentinels. | |
710 | 419 highest_unused_vtable_index_value = -5, |
0 | 420 invalid_vtable_index = -4, // distinct from any valid vtable index |
421 garbage_vtable_index = -3, // not yet linked; no vtable layout yet | |
422 nonvirtual_vtable_index = -2 // there is no need for vtable dispatch | |
423 // 6330203 Note: Do not use -1, which was overloaded with many meanings. | |
424 }; | |
425 DEBUG_ONLY(bool valid_vtable_index() const { return _vtable_index >= nonvirtual_vtable_index; }) | |
426 int vtable_index() const { assert(valid_vtable_index(), ""); | |
427 return _vtable_index; } | |
428 void set_vtable_index(int index) { _vtable_index = index; } | |
429 | |
430 // interpreter entry | |
431 address interpreter_entry() const { return _i2i_entry; } | |
432 // Only used when first initialize so we can set _i2i_entry and _from_interpreted_entry | |
433 void set_interpreter_entry(address entry) { _i2i_entry = entry; _from_interpreted_entry = entry; } | |
434 int interpreter_kind(void) { | |
435 return constMethod()->interpreter_kind(); | |
436 } | |
437 void set_interpreter_kind(); | |
438 void set_interpreter_kind(int kind) { | |
439 constMethod()->set_interpreter_kind(kind); | |
440 } | |
441 | |
442 // native function (used for native methods only) | |
443 enum { | |
444 native_bind_event_is_interesting = true | |
445 }; | |
446 address native_function() const { return *(native_function_addr()); } | |
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447 address critical_native_function(); |
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448 |
0 | 449 // Must specify a real function (not NULL). |
450 // Use clear_native_function() to unregister. | |
451 void set_native_function(address function, bool post_event_flag); | |
452 bool has_native_function() const; | |
453 void clear_native_function(); | |
454 | |
455 // signature handler (used for native methods only) | |
456 address signature_handler() const { return *(signature_handler_addr()); } | |
457 void set_signature_handler(address handler); | |
458 | |
459 // Interpreter oopmap support | |
460 void mask_for(int bci, InterpreterOopMap* mask); | |
461 | |
462 #ifndef PRODUCT | |
463 // operations on invocation counter | |
1783 | 464 void print_invocation_count(); |
0 | 465 #endif |
466 | |
467 // byte codes | |
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468 void set_code(address code) { return constMethod()->set_code(code); } |
0 | 469 address code_base() const { return constMethod()->code_base(); } |
470 bool contains(address bcp) const { return constMethod()->contains(bcp); } | |
471 | |
472 // prints byte codes | |
473 void print_codes() const { print_codes_on(tty); } | |
474 void print_codes_on(outputStream* st) const PRODUCT_RETURN; | |
475 void print_codes_on(int from, int to, outputStream* st) const PRODUCT_RETURN; | |
476 | |
477 // checked exceptions | |
478 int checked_exceptions_length() const | |
479 { return constMethod()->checked_exceptions_length(); } | |
480 CheckedExceptionElement* checked_exceptions_start() const | |
481 { return constMethod()->checked_exceptions_start(); } | |
482 | |
483 // localvariable table | |
484 bool has_localvariable_table() const | |
485 { return constMethod()->has_localvariable_table(); } | |
486 int localvariable_table_length() const | |
487 { return constMethod()->localvariable_table_length(); } | |
488 LocalVariableTableElement* localvariable_table_start() const | |
489 { return constMethod()->localvariable_table_start(); } | |
490 | |
491 bool has_linenumber_table() const | |
492 { return constMethod()->has_linenumber_table(); } | |
493 u_char* compressed_linenumber_table() const | |
494 { return constMethod()->compressed_linenumber_table(); } | |
495 | |
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496 // method holder (the Klass* holding this method) |
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497 Klass* method_holder() const { return constants()->pool_holder(); } |
0 | 498 |
499 void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments) | |
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500 Symbol* klass_name() const; // returns the name of the method holder |
0 | 501 BasicType result_type() const; // type of the method result |
502 int result_type_index() const; // type index of the method result | |
503 bool is_returning_oop() const { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); } | |
504 bool is_returning_fp() const { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); } | |
505 | |
506 // Checked exceptions thrown by this method (resolved to mirrors) | |
507 objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); } | |
508 | |
509 // Access flags | |
510 bool is_public() const { return access_flags().is_public(); } | |
511 bool is_private() const { return access_flags().is_private(); } | |
512 bool is_protected() const { return access_flags().is_protected(); } | |
513 bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); } | |
514 bool is_static() const { return access_flags().is_static(); } | |
515 bool is_final() const { return access_flags().is_final(); } | |
516 bool is_synchronized() const { return access_flags().is_synchronized();} | |
517 bool is_native() const { return access_flags().is_native(); } | |
518 bool is_abstract() const { return access_flags().is_abstract(); } | |
519 bool is_strict() const { return access_flags().is_strict(); } | |
520 bool is_synthetic() const { return access_flags().is_synthetic(); } | |
521 | |
522 // returns true if contains only return operation | |
523 bool is_empty_method() const; | |
524 | |
525 // returns true if this is a vanilla constructor | |
526 bool is_vanilla_constructor() const; | |
527 | |
528 // checks method and its method holder | |
529 bool is_final_method() const; | |
530 bool is_strict_method() const; | |
531 | |
532 // true if method needs no dynamic dispatch (final and/or no vtable entry) | |
533 bool can_be_statically_bound() const; | |
534 | |
535 // returns true if the method has any backward branches. | |
536 bool has_loops() { | |
537 return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag(); | |
538 }; | |
539 | |
540 bool compute_has_loops_flag(); | |
541 | |
542 bool has_jsrs() { | |
543 return access_flags().has_jsrs(); | |
544 }; | |
545 void set_has_jsrs() { | |
546 _access_flags.set_has_jsrs(); | |
547 } | |
548 | |
549 // returns true if the method has any monitors. | |
550 bool has_monitors() const { return is_synchronized() || access_flags().has_monitor_bytecodes(); } | |
551 bool has_monitor_bytecodes() const { return access_flags().has_monitor_bytecodes(); } | |
552 | |
553 void set_has_monitor_bytecodes() { _access_flags.set_has_monitor_bytecodes(); } | |
554 | |
555 // monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes | |
556 // propererly nest in the method. It might return false, even though they actually nest properly, since the info. | |
557 // has not been computed yet. | |
558 bool guaranteed_monitor_matching() const { return access_flags().is_monitor_matching(); } | |
559 void set_guaranteed_monitor_matching() { _access_flags.set_monitor_matching(); } | |
560 | |
561 // returns true if the method is an accessor function (setter/getter). | |
562 bool is_accessor() const; | |
563 | |
564 // returns true if the method is an initializer (<init> or <clinit>). | |
565 bool is_initializer() const; | |
566 | |
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567 // returns true if the method is static OR if the classfile version < 51 |
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568 bool has_valid_initializer_flags() const; |
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569 |
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570 // returns true if the method name is <clinit> and the method has |
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571 // valid static initializer flags. |
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572 bool is_static_initializer() const; |
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573 |
0 | 574 // compiled code support |
575 // NOTE: code() is inherently racy as deopt can be clearing code | |
576 // simultaneously. Use with caution. | |
577 bool has_compiled_code() const { return code() != NULL; } | |
578 | |
579 // sizing | |
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580 static int header_size() { return sizeof(Method)/HeapWordSize; } |
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581 static int size(bool is_native); |
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582 int size() const { return method_size(); } |
0 | 583 |
584 // interpreter support | |
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585 static ByteSize const_offset() { return byte_offset_of(Method, _constMethod ); } |
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586 static ByteSize access_flags_offset() { return byte_offset_of(Method, _access_flags ); } |
0 | 587 #ifdef CC_INTERP |
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588 static ByteSize result_index_offset() { return byte_offset_of(Method, _result_index ); } |
0 | 589 #endif /* CC_INTERP */ |
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590 static ByteSize size_of_locals_offset() { return byte_offset_of(Method, _max_locals ); } |
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591 static ByteSize size_of_parameters_offset() { return byte_offset_of(Method, _size_of_parameters); } |
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592 static ByteSize from_compiled_offset() { return byte_offset_of(Method, _from_compiled_entry); } |
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593 static ByteSize code_offset() { return byte_offset_of(Method, _code); } |
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594 static ByteSize invocation_counter_offset() { return byte_offset_of(Method, _invocation_counter); } |
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595 static ByteSize backedge_counter_offset() { return byte_offset_of(Method, _backedge_counter); } |
0 | 596 static ByteSize method_data_offset() { |
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597 return byte_offset_of(Method, _method_data); |
0 | 598 } |
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599 static ByteSize interpreter_invocation_counter_offset() { return byte_offset_of(Method, _interpreter_invocation_count); } |
0 | 600 #ifndef PRODUCT |
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601 static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(Method, _compiled_invocation_count); } |
0 | 602 #endif // not PRODUCT |
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603 static ByteSize native_function_offset() { return in_ByteSize(sizeof(Method)); } |
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604 static ByteSize from_interpreted_offset() { return byte_offset_of(Method, _from_interpreted_entry ); } |
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605 static ByteSize interpreter_entry_offset() { return byte_offset_of(Method, _i2i_entry ); } |
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606 static ByteSize signature_handler_offset() { return in_ByteSize(sizeof(Method) + wordSize); } |
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607 static ByteSize max_stack_offset() { return byte_offset_of(Method, _max_stack ); } |
0 | 608 |
609 // for code generation | |
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610 static int method_data_offset_in_bytes() { return offset_of(Method, _method_data); } |
0 | 611 static int interpreter_invocation_counter_offset_in_bytes() |
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612 { return offset_of(Method, _interpreter_invocation_count); } |
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613 static int intrinsic_id_offset_in_bytes() { return offset_of(Method, _intrinsic_id); } |
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614 static int intrinsic_id_size_in_bytes() { return sizeof(u1); } |
0 | 615 |
616 // Static methods that are used to implement member methods where an exposed this pointer | |
617 // is needed due to possible GCs | |
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618 static objArrayHandle resolved_checked_exceptions_impl(Method* this_oop, TRAPS); |
0 | 619 |
620 // Returns the byte code index from the byte code pointer | |
621 int bci_from(address bcp) const; | |
622 address bcp_from(int bci) const; | |
623 int validate_bci_from_bcx(intptr_t bcx) const; | |
624 | |
625 // Returns the line number for a bci if debugging information for the method is prowided, | |
626 // -1 is returned otherwise. | |
627 int line_number_from_bci(int bci) const; | |
628 | |
629 // Reflection support | |
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630 bool is_overridden_in(Klass* k) const; |
0 | 631 |
710 | 632 // JSR 292 support |
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633 bool is_method_handle_intrinsic() const; // MethodHandles::is_signature_polymorphic_intrinsic(intrinsic_id) |
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634 bool is_compiled_lambda_form() const; // intrinsic_id() == vmIntrinsics::_compiledLambdaForm |
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635 bool has_member_arg() const; // intrinsic_id() == vmIntrinsics::_linkToSpecial, etc. |
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636 static methodHandle make_method_handle_intrinsic(vmIntrinsics::ID iid, // _invokeBasic, _linkToVirtual |
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637 Symbol* signature, //anything at all |
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638 TRAPS); |
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639 static Klass* check_non_bcp_klass(Klass* klass); |
710 | 640 // these operate only on invoke methods: |
641 // presize interpreter frames for extra interpreter stack entries, if needed | |
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642 // method handles want to be able to push a few extra values (e.g., a bound receiver), and |
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643 // invokedynamic sometimes needs to push a bootstrap method, call site, and arglist, |
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644 // all without checking for a stack overflow |
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645 static int extra_stack_entries() { return EnableInvokeDynamic ? 2 : 0; } |
710 | 646 static int extra_stack_words(); // = extra_stack_entries() * Interpreter::stackElementSize() |
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647 |
0 | 648 // RedefineClasses() support: |
649 bool is_old() const { return access_flags().is_old(); } | |
650 void set_is_old() { _access_flags.set_is_old(); } | |
651 bool is_obsolete() const { return access_flags().is_obsolete(); } | |
652 void set_is_obsolete() { _access_flags.set_is_obsolete(); } | |
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653 bool on_stack() const { return access_flags().on_stack(); } |
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654 void set_on_stack(const bool value); |
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655 |
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656 // see the definition in Method*.cpp for the gory details |
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657 bool should_not_be_cached() const; |
0 | 658 |
659 // JVMTI Native method prefixing support: | |
660 bool is_prefixed_native() const { return access_flags().is_prefixed_native(); } | |
661 void set_is_prefixed_native() { _access_flags.set_is_prefixed_native(); } | |
662 | |
663 // Rewriting support | |
664 static methodHandle clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length, | |
665 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS); | |
666 | |
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667 // jmethodID handling |
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668 // Because the useful life-span of a jmethodID cannot be determined, |
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669 // once created they are never reclaimed. The methods to which they refer, |
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670 // however, can be GC'ed away if the class is unloaded or if the method is |
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671 // made obsolete or deleted -- in these cases, the jmethodID |
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672 // refers to NULL (as is the case for any weak reference). |
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673 static jmethodID make_jmethod_id(ClassLoaderData* loader_data, Method* mh); |
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674 static void destroy_jmethod_id(ClassLoaderData* loader_data, jmethodID mid); |
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675 |
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676 // Use resolve_jmethod_id() in situations where the caller is expected |
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677 // to provide a valid jmethodID; the only sanity checks are in asserts; |
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678 // result guaranteed not to be NULL. |
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679 inline static Method* resolve_jmethod_id(jmethodID mid) { |
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680 assert(mid != NULL, "JNI method id should not be null"); |
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681 return *((Method**)mid); |
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682 } |
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683 |
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684 // Use checked_resolve_jmethod_id() in situations where the caller |
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685 // should provide a valid jmethodID, but might not. NULL is returned |
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686 // when the jmethodID does not refer to a valid method. |
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687 static Method* checked_resolve_jmethod_id(jmethodID mid); |
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688 |
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689 static void change_method_associated_with_jmethod_id(jmethodID old_jmid_ptr, Method* new_method); |
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690 static bool is_method_id(jmethodID mid); |
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691 |
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692 // Clear methods |
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693 static void clear_jmethod_ids(ClassLoaderData* loader_data); |
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694 static void print_jmethod_ids(ClassLoaderData* loader_data, outputStream* out) PRODUCT_RETURN; |
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695 |
0 | 696 // Get this method's jmethodID -- allocate if it doesn't exist |
697 jmethodID jmethod_id() { methodHandle this_h(this); | |
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698 return InstanceKlass::get_jmethod_id(InstanceKlass::cast(method_holder()), this_h); } |
0 | 699 |
700 // Lookup the jmethodID for this method. Return NULL if not found. | |
701 // NOTE that this function can be called from a signal handler | |
702 // (see AsyncGetCallTrace support for Forte Analyzer) and this | |
703 // needs to be async-safe. No allocation should be done and | |
704 // so handles are not used to avoid deadlock. | |
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705 jmethodID find_jmethod_id_or_null() { return InstanceKlass::cast(method_holder())->jmethod_id_or_null(this); } |
0 | 706 |
707 // JNI static invoke cached itable index accessors | |
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708 int cached_itable_index() { return InstanceKlass::cast(method_holder())->cached_itable_index(method_idnum()); } |
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709 void set_cached_itable_index(int index) { InstanceKlass::cast(method_holder())->set_cached_itable_index(method_idnum(), index); } |
0 | 710 |
711 // Support for inlining of intrinsic methods | |
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712 vmIntrinsics::ID intrinsic_id() const { return (vmIntrinsics::ID) _intrinsic_id; } |
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713 void set_intrinsic_id(vmIntrinsics::ID id) { _intrinsic_id = (u1) id; } |
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714 |
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715 // Helper routines for intrinsic_id() and vmIntrinsics::method(). |
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716 void init_intrinsic_id(); // updates from _none if a match |
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717 static vmSymbols::SID klass_id_for_intrinsics(Klass* holder); |
0 | 718 |
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719 bool jfr_towrite() { return _jfr_towrite; } |
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720 void set_jfr_towrite(bool towrite) { _jfr_towrite = towrite; } |
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721 |
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722 bool force_inline() { return _force_inline; } |
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723 void set_force_inline(bool x) { _force_inline = x; } |
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724 bool dont_inline() { return _dont_inline; } |
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725 void set_dont_inline(bool x) { _dont_inline = x; } |
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726 bool is_hidden() { return _hidden; } |
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727 void set_hidden(bool x) { _hidden = x; } |
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728 |
0 | 729 // On-stack replacement support |
1783 | 730 bool has_osr_nmethod(int level, bool match_level) { |
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731 return InstanceKlass::cast(method_holder())->lookup_osr_nmethod(this, InvocationEntryBci, level, match_level) != NULL; |
1783 | 732 } |
733 | |
734 nmethod* lookup_osr_nmethod_for(int bci, int level, bool match_level) { | |
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735 return InstanceKlass::cast(method_holder())->lookup_osr_nmethod(this, bci, level, match_level); |
1783 | 736 } |
0 | 737 |
738 // Inline cache support | |
739 void cleanup_inline_caches(); | |
740 | |
741 // Find if klass for method is loaded | |
742 bool is_klass_loaded_by_klass_index(int klass_index) const; | |
743 bool is_klass_loaded(int refinfo_index, bool must_be_resolved = false) const; | |
744 | |
745 // Indicates whether compilation failed earlier for this method, or | |
746 // whether it is not compilable for another reason like having a | |
747 // breakpoint set in it. | |
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748 bool is_not_compilable(int comp_level = CompLevel_any) const; |
1783 | 749 void set_not_compilable(int comp_level = CompLevel_all, bool report = true); |
750 void set_not_compilable_quietly(int comp_level = CompLevel_all) { | |
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751 set_not_compilable(comp_level, false); |
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752 } |
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753 bool is_not_osr_compilable(int comp_level = CompLevel_any) const; |
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754 void set_not_osr_compilable(int comp_level = CompLevel_all, bool report = true); |
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755 void set_not_osr_compilable_quietly(int comp_level = CompLevel_all) { |
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756 set_not_osr_compilable(comp_level, false); |
1783 | 757 } |
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758 |
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759 private: |
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760 void print_made_not_compilable(int comp_level, bool is_osr, bool report); |
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761 |
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762 public: |
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763 bool is_not_c1_compilable() const { return access_flags().is_not_c1_compilable(); } |
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764 void set_not_c1_compilable() { _access_flags.set_not_c1_compilable(); } |
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765 bool is_not_c2_compilable() const { return access_flags().is_not_c2_compilable(); } |
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766 void set_not_c2_compilable() { _access_flags.set_not_c2_compilable(); } |
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767 |
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768 bool is_not_c1_osr_compilable() const { return is_not_c1_compilable(); } // don't waste an accessFlags bit |
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769 void set_not_c1_osr_compilable() { set_not_c1_compilable(); } // don't waste an accessFlags bit |
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770 bool is_not_c2_osr_compilable() const { return access_flags().is_not_c2_osr_compilable(); } |
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771 void set_not_c2_osr_compilable() { _access_flags.set_not_c2_osr_compilable(); } |
0 | 772 |
773 // Background compilation support | |
1783 | 774 bool queued_for_compilation() const { return access_flags().queued_for_compilation(); } |
775 void set_queued_for_compilation() { _access_flags.set_queued_for_compilation(); } | |
776 void clear_queued_for_compilation() { _access_flags.clear_queued_for_compilation(); } | |
0 | 777 |
778 // Resolve all classes in signature, return 'true' if successful | |
779 static bool load_signature_classes(methodHandle m, TRAPS); | |
780 | |
781 // Return if true if not all classes references in signature, including return type, has been loaded | |
782 static bool has_unloaded_classes_in_signature(methodHandle m, TRAPS); | |
783 | |
784 // Printing | |
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785 void print_short_name(outputStream* st = tty) /*PRODUCT_RETURN*/; // prints as klassname::methodname; Exposed so field engineers can debug VM |
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786 void print_name(outputStream* st = tty) PRODUCT_RETURN; // prints as "virtual void foo(int)" |
0 | 787 |
788 // Helper routine used for method sorting | |
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789 static void sort_methods(Array<Method*>* methods, |
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790 Array<AnnotationArray*>* methods_annotations, |
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791 Array<AnnotationArray*>* methods_parameter_annotations, |
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792 Array<AnnotationArray*>* methods_default_annotations, |
0 | 793 bool idempotent = false); |
794 | |
795 // size of parameters | |
796 void set_size_of_parameters(int size) { _size_of_parameters = size; } | |
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797 |
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798 // Deallocation function for redefine classes or if an error occurs |
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799 void deallocate_contents(ClassLoaderData* loader_data); |
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800 |
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801 // Printing |
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802 #ifndef PRODUCT |
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803 void print_on(outputStream* st) const; |
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804 #endif |
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805 void print_value_on(outputStream* st) const; |
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806 |
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807 const char* internal_name() const { return "{method}"; } |
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808 |
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809 // Verify |
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810 void verify() { verify_on(tty); } |
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811 void verify_on(outputStream* st); |
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812 |
0 | 813 private: |
814 | |
815 // Inlined elements | |
816 address* native_function_addr() const { assert(is_native(), "must be native"); return (address*) (this+1); } | |
817 address* signature_handler_addr() const { return native_function_addr() + 1; } | |
818 }; | |
819 | |
820 | |
821 // Utility class for compressing line number tables | |
822 | |
823 class CompressedLineNumberWriteStream: public CompressedWriteStream { | |
824 private: | |
825 int _bci; | |
826 int _line; | |
827 public: | |
828 // Constructor | |
829 CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {} | |
830 CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {} | |
831 | |
832 // Write (bci, line number) pair to stream | |
833 void write_pair_regular(int bci_delta, int line_delta); | |
834 | |
835 inline void write_pair_inline(int bci, int line) { | |
836 int bci_delta = bci - _bci; | |
837 int line_delta = line - _line; | |
838 _bci = bci; | |
839 _line = line; | |
840 // Skip (0,0) deltas - they do not add information and conflict with terminator. | |
841 if (bci_delta == 0 && line_delta == 0) return; | |
842 // Check if bci is 5-bit and line number 3-bit unsigned. | |
843 if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) { | |
844 // Compress into single byte. | |
845 jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta; | |
846 // Check that value doesn't match escape character. | |
847 if (value != 0xFF) { | |
848 write_byte(value); | |
849 return; | |
850 } | |
851 } | |
852 write_pair_regular(bci_delta, line_delta); | |
853 } | |
854 | |
855 // Windows AMD64 + Apr 2005 PSDK with /O2 generates bad code for write_pair. | |
856 // Disabling optimization doesn't work for methods in header files | |
857 // so we force it to call through the non-optimized version in the .cpp. | |
858 // It's gross, but it's the only way we can ensure that all callers are | |
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859 // fixed. _MSC_VER is defined by the windows compiler |
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860 #if defined(_M_AMD64) && _MSC_VER >= 1400 |
0 | 861 void write_pair(int bci, int line); |
862 #else | |
863 void write_pair(int bci, int line) { write_pair_inline(bci, line); } | |
864 #endif | |
865 | |
866 // Write end-of-stream marker | |
867 void write_terminator() { write_byte(0); } | |
868 }; | |
869 | |
870 | |
871 // Utility class for decompressing line number tables | |
872 | |
873 class CompressedLineNumberReadStream: public CompressedReadStream { | |
874 private: | |
875 int _bci; | |
876 int _line; | |
877 public: | |
878 // Constructor | |
879 CompressedLineNumberReadStream(u_char* buffer); | |
880 // Read (bci, line number) pair from stream. Returns false at end-of-stream. | |
881 bool read_pair(); | |
882 // Accessing bci and line number (after calling read_pair) | |
883 int bci() const { return _bci; } | |
884 int line() const { return _line; } | |
885 }; | |
886 | |
887 | |
888 /// Fast Breakpoints. | |
889 | |
890 // If this structure gets more complicated (because bpts get numerous), | |
891 // move it into its own header. | |
892 | |
893 // There is presently no provision for concurrent access | |
894 // to breakpoint lists, which is only OK for JVMTI because | |
895 // breakpoints are written only at safepoints, and are read | |
896 // concurrently only outside of safepoints. | |
897 | |
6197 | 898 class BreakpointInfo : public CHeapObj<mtClass> { |
0 | 899 friend class VMStructs; |
900 private: | |
901 Bytecodes::Code _orig_bytecode; | |
902 int _bci; | |
903 u2 _name_index; // of method | |
904 u2 _signature_index; // of method | |
905 BreakpointInfo* _next; // simple storage allocation | |
906 | |
907 public: | |
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908 BreakpointInfo(Method* m, int bci); |
0 | 909 |
910 // accessors | |
911 Bytecodes::Code orig_bytecode() { return _orig_bytecode; } | |
912 void set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; } | |
913 int bci() { return _bci; } | |
914 | |
915 BreakpointInfo* next() const { return _next; } | |
916 void set_next(BreakpointInfo* n) { _next = n; } | |
917 | |
918 // helps for searchers | |
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919 bool match(const Method* m, int bci) { |
0 | 920 return bci == _bci && match(m); |
921 } | |
922 | |
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923 bool match(const Method* m) { |
0 | 924 return _name_index == m->name_index() && |
925 _signature_index == m->signature_index(); | |
926 } | |
927 | |
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928 void set(Method* method); |
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929 void clear(Method* method); |
0 | 930 }; |
1972 | 931 |
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932 // Utility class for access exception handlers |
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933 class ExceptionTable : public StackObj { |
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934 private: |
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935 ExceptionTableElement* _table; |
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936 u2 _length; |
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937 |
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938 public: |
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939 ExceptionTable(Method* m) { |
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940 if (m->has_exception_handler()) { |
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941 _table = m->exception_table_start(); |
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942 _length = m->exception_table_length(); |
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943 } else { |
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944 _table = NULL; |
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945 _length = 0; |
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946 } |
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947 } |
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948 |
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949 int length() const { |
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950 return _length; |
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951 } |
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952 |
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953 u2 start_pc(int idx) const { |
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954 assert(idx < _length, "out of bounds"); |
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955 return _table[idx].start_pc; |
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956 } |
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957 |
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958 void set_start_pc(int idx, u2 value) { |
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959 assert(idx < _length, "out of bounds"); |
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960 _table[idx].start_pc = value; |
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961 } |
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962 |
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963 u2 end_pc(int idx) const { |
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964 assert(idx < _length, "out of bounds"); |
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965 return _table[idx].end_pc; |
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966 } |
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967 |
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968 void set_end_pc(int idx, u2 value) { |
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969 assert(idx < _length, "out of bounds"); |
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970 _table[idx].end_pc = value; |
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971 } |
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972 |
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973 u2 handler_pc(int idx) const { |
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974 assert(idx < _length, "out of bounds"); |
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975 return _table[idx].handler_pc; |
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976 } |
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977 |
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978 void set_handler_pc(int idx, u2 value) { |
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979 assert(idx < _length, "out of bounds"); |
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980 _table[idx].handler_pc = value; |
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981 } |
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982 |
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983 u2 catch_type_index(int idx) const { |
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984 assert(idx < _length, "out of bounds"); |
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985 return _table[idx].catch_type_index; |
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986 } |
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987 |
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988 void set_catch_type_index(int idx, u2 value) { |
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989 assert(idx < _length, "out of bounds"); |
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990 _table[idx].catch_type_index = value; |
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991 } |
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992 }; |
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993 |
1972 | 994 #endif // SHARE_VM_OOPS_METHODOOP_HPP |