Mercurial > hg > truffle
annotate src/share/vm/oops/method.hpp @ 19579:3df56ce39922
Merge.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Tue, 24 Feb 2015 12:33:32 +0100 |
parents | 52b4284cb496 |
children | 7848fc12602b |
rev | line source |
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0 | 1 /* |
7956 | 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_OOPS_METHODOOP_HPP |
26 #define SHARE_VM_OOPS_METHODOOP_HPP | |
27 | |
28 #include "classfile/vmSymbols.hpp" | |
29 #include "code/compressedStream.hpp" | |
30 #include "compiler/oopMap.hpp" | |
31 #include "interpreter/invocationCounter.hpp" | |
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32 #include "oops/annotations.hpp" |
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33 #include "oops/constantPool.hpp" |
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34 #include "oops/methodCounters.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) | | |
10233 | 70 // | methodCounters | |
0 | 71 // |------------------------------------------------------| |
72 // | access_flags | | |
73 // | vtable_index | | |
74 // |------------------------------------------------------| | |
75 // | result_index (C++ interpreter only) | | |
76 // |------------------------------------------------------| | |
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77 // | method_size | intrinsic_id| flags | |
0 | 78 // |------------------------------------------------------| |
79 // | code (pointer) | | |
80 // | i2i (pointer) | | |
81 // | adapter (pointer) | | |
82 // | from_compiled_entry (pointer) | | |
83 // | from_interpreted_entry (pointer) | | |
84 // |------------------------------------------------------| | |
85 // | native_function (present only if native) | | |
86 // | signature_handler (present only if native) | | |
87 // |------------------------------------------------------| | |
88 | |
89 | |
90 class CheckedExceptionElement; | |
91 class LocalVariableTableElement; | |
92 class AdapterHandlerEntry; | |
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93 class MethodData; |
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94 class MethodCounters; |
6934 | 95 class ConstMethod; |
8031 | 96 class InlineTableSizes; |
7956 | 97 class KlassSizeStats; |
0 | 98 |
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99 class Method : public Metadata { |
0 | 100 friend class VMStructs; |
101 private: | |
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102 ConstMethod* _constMethod; // Method read-only data. |
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103 MethodData* _method_data; |
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104 MethodCounters* _method_counters; |
0 | 105 AccessFlags _access_flags; // Access flags |
106 int _vtable_index; // vtable index of this method (see VtableIndexFlag) | |
107 // note: can have vtables with >2**16 elements (because of inheritance) | |
108 #ifdef CC_INTERP | |
109 int _result_index; // C++ interpreter needs for converting results to/from stack | |
110 #endif | |
111 u2 _method_size; // size of this object | |
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112 u1 _intrinsic_id; // vmSymbols::intrinsic_id (0 == _none) |
14909 | 113 |
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114 // Flags |
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115 enum Flags { |
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116 _jfr_towrite = 1 << 0, |
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117 _caller_sensitive = 1 << 1, |
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118 _force_inline = 1 << 2, |
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119 _dont_inline = 1 << 3, |
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120 _hidden = 1 << 4 |
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121 }; |
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122 u1 _flags; |
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123 |
0 | 124 #ifndef PRODUCT |
125 int _compiled_invocation_count; // Number of nmethod invocations so far (for perf. debugging) | |
126 #endif | |
127 // Entry point for calling both from and to the interpreter. | |
128 address _i2i_entry; // All-args-on-stack calling convention | |
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129 // Adapter blob (i2c/c2i) for this Method*. Set once when method is linked. |
0 | 130 AdapterHandlerEntry* _adapter; |
131 // Entry point for calling from compiled code, to compiled code if it exists | |
132 // or else the interpreter. | |
133 volatile address _from_compiled_entry; // Cache of: _code ? _code->entry_point() : _adapter->c2i_entry() | |
134 // The entry point for calling both from and to compiled code is | |
135 // "_code->entry_point()". Because of tiered compilation and de-opt, this | |
136 // field can come and go. It can transition from NULL to not-null at any | |
137 // time (whenever a compile completes). It can transition from not-null to | |
138 // NULL only at safepoints (because of a de-opt). | |
139 nmethod* volatile _code; // Points to the corresponding piece of native code | |
140 volatile address _from_interpreted_entry; // Cache of _code ? _adapter->i2c_entry() : _i2i_entry | |
141 | |
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142 // Constructor |
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143 Method(ConstMethod* xconst, AccessFlags access_flags, int size); |
0 | 144 public: |
6934 | 145 |
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146 static Method* allocate(ClassLoaderData* loader_data, |
6934 | 147 int byte_code_size, |
148 AccessFlags access_flags, | |
8031 | 149 InlineTableSizes* sizes, |
6934 | 150 ConstMethod::MethodType method_type, |
151 TRAPS); | |
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152 |
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153 // CDS and vtbl checking can create an empty Method to get vtbl pointer. |
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154 Method(){} |
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155 |
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156 // The Method vtable is restored by this call when the Method is in the |
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157 // shared archive. See patch_klass_vtables() in metaspaceShared.cpp for |
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158 // all the gory details. SA, dtrace and pstack helpers distinguish metadata |
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159 // by their vtable. |
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160 void restore_vtable() { guarantee(is_method(), "vtable restored by this call"); } |
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161 bool is_method() const volatile { return true; } |
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162 |
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163 void restore_unshareable_info(TRAPS); |
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164 |
0 | 165 // accessors for instance variables |
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166 |
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167 ConstMethod* constMethod() const { return _constMethod; } |
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168 void set_constMethod(ConstMethod* xconst) { _constMethod = xconst; } |
0 | 169 |
170 | |
171 static address make_adapters(methodHandle mh, TRAPS); | |
172 volatile address from_compiled_entry() const { return (address)OrderAccess::load_ptr_acquire(&_from_compiled_entry); } | |
173 volatile address from_interpreted_entry() const{ return (address)OrderAccess::load_ptr_acquire(&_from_interpreted_entry); } | |
174 | |
175 // access flag | |
176 AccessFlags access_flags() const { return _access_flags; } | |
177 void set_access_flags(AccessFlags flags) { _access_flags = flags; } | |
178 | |
179 // name | |
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180 Symbol* name() const { return constants()->symbol_at(name_index()); } |
0 | 181 int name_index() const { return constMethod()->name_index(); } |
182 void set_name_index(int index) { constMethod()->set_name_index(index); } | |
183 | |
184 // signature | |
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185 Symbol* signature() const { return constants()->symbol_at(signature_index()); } |
0 | 186 int signature_index() const { return constMethod()->signature_index(); } |
187 void set_signature_index(int index) { constMethod()->set_signature_index(index); } | |
188 | |
189 // generics support | |
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190 Symbol* generic_signature() const { int idx = generic_signature_index(); return ((idx != 0) ? constants()->symbol_at(idx) : (Symbol*)NULL); } |
0 | 191 int generic_signature_index() const { return constMethod()->generic_signature_index(); } |
192 void set_generic_signature_index(int index) { constMethod()->set_generic_signature_index(index); } | |
193 | |
194 // annotations support | |
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195 AnnotationArray* annotations() const { |
8031 | 196 return constMethod()->method_annotations(); |
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197 } |
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198 AnnotationArray* parameter_annotations() const { |
8031 | 199 return constMethod()->parameter_annotations(); |
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200 } |
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201 AnnotationArray* annotation_default() const { |
8031 | 202 return constMethod()->default_annotations(); |
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203 } |
8031 | 204 AnnotationArray* type_annotations() const { |
205 return constMethod()->type_annotations(); | |
206 } | |
0 | 207 |
208 #ifdef CC_INTERP | |
209 void set_result_index(BasicType type); | |
210 int result_index() { return _result_index; } | |
211 #endif | |
212 | |
213 // Helper routine: get klass name + "." + method name + signature as | |
214 // C string, for the purpose of providing more useful NoSuchMethodErrors | |
215 // and fatal error handling. The string is allocated in resource | |
216 // area if a buffer is not provided by the caller. | |
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217 char* name_and_sig_as_C_string() const; |
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218 char* name_and_sig_as_C_string(char* buf, int size) const; |
0 | 219 |
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220 // Static routine in the situations we don't have a Method* |
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221 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature); |
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222 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size); |
0 | 223 |
2142 | 224 Bytecodes::Code java_code_at(int bci) const { |
225 return Bytecodes::java_code_at(this, bcp_from(bci)); | |
226 } | |
227 Bytecodes::Code code_at(int bci) const { | |
228 return Bytecodes::code_at(this, bcp_from(bci)); | |
229 } | |
230 | |
0 | 231 // JVMTI breakpoints |
2142 | 232 Bytecodes::Code orig_bytecode_at(int bci) const; |
0 | 233 void set_orig_bytecode_at(int bci, Bytecodes::Code code); |
234 void set_breakpoint(int bci); | |
235 void clear_breakpoint(int bci); | |
236 void clear_all_breakpoints(); | |
237 // Tracking number of breakpoints, for fullspeed debugging. | |
238 // Only mutated by VM thread. | |
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239 u2 number_of_breakpoints() const { |
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240 if (method_counters() == NULL) { |
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241 return 0; |
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242 } else { |
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243 return method_counters()->number_of_breakpoints(); |
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244 } |
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245 } |
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246 void incr_number_of_breakpoints(TRAPS) { |
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247 MethodCounters* mcs = get_method_counters(CHECK); |
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248 if (mcs != NULL) { |
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249 mcs->incr_number_of_breakpoints(); |
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250 } |
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251 } |
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252 void decr_number_of_breakpoints(TRAPS) { |
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253 MethodCounters* mcs = get_method_counters(CHECK); |
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254 if (mcs != NULL) { |
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255 mcs->decr_number_of_breakpoints(); |
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256 } |
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257 } |
0 | 258 // Initialization only |
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259 void clear_number_of_breakpoints() { |
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260 if (method_counters() != NULL) { |
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261 method_counters()->clear_number_of_breakpoints(); |
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262 } |
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263 } |
0 | 264 |
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265 // index into InstanceKlass methods() array |
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266 // note: also used by jfr |
0 | 267 u2 method_idnum() const { return constMethod()->method_idnum(); } |
268 void set_method_idnum(u2 idnum) { constMethod()->set_method_idnum(idnum); } | |
269 | |
270 // code size | |
271 int code_size() const { return constMethod()->code_size(); } | |
272 | |
273 // method size | |
274 int method_size() const { return _method_size; } | |
275 void set_method_size(int size) { | |
276 assert(0 <= size && size < (1 << 16), "invalid method size"); | |
277 _method_size = size; | |
278 } | |
279 | |
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280 // constant pool for Klass* holding this method |
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281 ConstantPool* constants() const { return constMethod()->constants(); } |
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282 void set_constants(ConstantPool* c) { constMethod()->set_constants(c); } |
0 | 283 |
284 // max stack | |
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285 // return original max stack size for method verification |
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286 int verifier_max_stack() const { return constMethod()->max_stack(); } |
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287 int max_stack() const { return constMethod()->max_stack() + extra_stack_entries(); } |
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288 void set_max_stack(int size) { constMethod()->set_max_stack(size); } |
0 | 289 |
290 // max locals | |
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291 int max_locals() const { return constMethod()->max_locals(); } |
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292 void set_max_locals(int size) { constMethod()->set_max_locals(size); } |
1783 | 293 |
294 int highest_comp_level() const; | |
295 void set_highest_comp_level(int level); | |
296 int highest_osr_comp_level() const; | |
297 void set_highest_osr_comp_level(int level); | |
0 | 298 |
299 // Count of times method was exited via exception while interpreting | |
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300 void interpreter_throwout_increment(TRAPS) { |
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301 MethodCounters* mcs = get_method_counters(CHECK); |
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302 if (mcs != NULL) { |
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303 mcs->interpreter_throwout_increment(); |
0 | 304 } |
305 } | |
306 | |
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307 int interpreter_throwout_count() const { |
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308 if (method_counters() == NULL) { |
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309 return 0; |
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310 } else { |
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311 return method_counters()->interpreter_throwout_count(); |
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312 } |
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313 } |
0 | 314 |
315 // size of parameters | |
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316 int size_of_parameters() const { return constMethod()->size_of_parameters(); } |
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317 void set_size_of_parameters(int size) { constMethod()->set_size_of_parameters(size); } |
0 | 318 |
319 bool has_stackmap_table() const { | |
320 return constMethod()->has_stackmap_table(); | |
321 } | |
322 | |
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323 Array<u1>* stackmap_data() const { |
0 | 324 return constMethod()->stackmap_data(); |
325 } | |
326 | |
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327 void set_stackmap_data(Array<u1>* sd) { |
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328 constMethod()->set_stackmap_data(sd); |
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329 } |
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330 |
0 | 331 // exception handler table |
332 bool has_exception_handler() const | |
333 { return constMethod()->has_exception_handler(); } | |
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334 int exception_table_length() const |
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335 { return constMethod()->exception_table_length(); } |
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336 ExceptionTableElement* exception_table_start() const |
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337 { return constMethod()->exception_table_start(); } |
0 | 338 |
339 // Finds the first entry point bci of an exception handler for an | |
340 // exception of klass ex_klass thrown at throw_bci. A value of NULL | |
341 // for ex_klass indicates that the exception klass is not known; in | |
342 // this case it matches any constraint class. Returns -1 if the | |
343 // exception cannot be handled in this method. The handler | |
344 // constraint classes are loaded if necessary. Note that this may | |
345 // throw an exception if loading of the constraint classes causes | |
346 // an IllegalAccessError (bugid 4307310) or an OutOfMemoryError. | |
347 // If an exception is thrown, returns the bci of the | |
348 // exception handler which caused the exception to be thrown, which | |
349 // is needed for proper retries. See, for example, | |
350 // InterpreterRuntime::exception_handler_for_exception. | |
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351 static int fast_exception_handler_bci_for(methodHandle mh, KlassHandle ex_klass, int throw_bci, TRAPS); |
0 | 352 |
353 // method data access | |
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354 MethodData* method_data() const { |
0 | 355 return _method_data; |
356 } | |
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357 |
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358 void set_method_data(MethodData* data) { |
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359 // The store into method must be released. On platforms without |
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360 // total store order (TSO) the reference may become visible before |
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361 // the initialization of data otherwise. |
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362 OrderAccess::release_store_ptr((volatile void *)&_method_data, data); |
0 | 363 } |
364 | |
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365 MethodCounters* method_counters() const { |
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366 return _method_counters; |
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367 } |
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368 |
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369 void set_method_counters(MethodCounters* counters) { |
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370 // The store into method must be released. On platforms without |
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371 // total store order (TSO) the reference may become visible before |
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372 // the initialization of data otherwise. |
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373 OrderAccess::release_store_ptr((volatile void *)&_method_counters, counters); |
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374 } |
1783 | 375 |
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376 #ifdef TIERED |
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377 // We are reusing interpreter_invocation_count as a holder for the previous event count! |
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378 // We can do that since interpreter_invocation_count is not used in tiered. |
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379 int prev_event_count() const { |
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380 if (method_counters() == NULL) { |
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381 return 0; |
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382 } else { |
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383 return method_counters()->interpreter_invocation_count(); |
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384 } |
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385 } |
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386 void set_prev_event_count(int count, TRAPS) { |
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387 MethodCounters* mcs = get_method_counters(CHECK); |
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388 if (mcs != NULL) { |
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389 mcs->set_interpreter_invocation_count(count); |
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390 } |
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391 } |
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392 jlong prev_time() const { |
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393 return method_counters() == NULL ? 0 : method_counters()->prev_time(); |
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394 } |
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395 void set_prev_time(jlong time, TRAPS) { |
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396 MethodCounters* mcs = get_method_counters(CHECK); |
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397 if (mcs != NULL) { |
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398 mcs->set_prev_time(time); |
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399 } |
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400 } |
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401 float rate() const { |
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402 return method_counters() == NULL ? 0 : method_counters()->rate(); |
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403 } |
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404 void set_rate(float rate, TRAPS) { |
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405 MethodCounters* mcs = get_method_counters(CHECK); |
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406 if (mcs != NULL) { |
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407 mcs->set_rate(rate); |
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408 } |
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409 } |
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410 #endif |
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411 |
1783 | 412 int invocation_count(); |
413 int backedge_count(); | |
414 | |
415 bool was_executed_more_than(int n); | |
416 bool was_never_executed() { return !was_executed_more_than(0); } | |
0 | 417 |
418 static void build_interpreter_method_data(methodHandle method, TRAPS); | |
419 | |
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420 static MethodCounters* build_method_counters(Method* m, TRAPS); |
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421 |
1783 | 422 int interpreter_invocation_count() { |
423 if (TieredCompilation) return invocation_count(); | |
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424 else return (method_counters() == NULL) ? 0 : |
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425 method_counters()->interpreter_invocation_count(); |
1783 | 426 } |
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427 int increment_interpreter_invocation_count(TRAPS) { |
1783 | 428 if (TieredCompilation) ShouldNotReachHere(); |
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429 MethodCounters* mcs = get_method_counters(CHECK_0); |
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430 return (mcs == NULL) ? 0 : mcs->increment_interpreter_invocation_count(); |
1783 | 431 } |
0 | 432 |
433 #ifndef PRODUCT | |
1783 | 434 int compiled_invocation_count() const { return _compiled_invocation_count; } |
0 | 435 void set_compiled_invocation_count(int count) { _compiled_invocation_count = count; } |
436 #endif // not PRODUCT | |
437 | |
605 | 438 // Clear (non-shared space) pointers which could not be relevant |
0 | 439 // if this (shared) method were mapped into another JVM. |
440 void remove_unshareable_info(); | |
441 | |
442 // nmethod/verified compiler entry | |
443 address verified_code_entry(); | |
444 bool check_code() const; // Not inline to avoid circular ref | |
445 nmethod* volatile code() const { assert( check_code(), "" ); return (nmethod *)OrderAccess::load_ptr_acquire(&_code); } | |
446 void clear_code(); // Clear out any compiled code | |
1202 | 447 static void set_code(methodHandle mh, nmethod* code); |
0 | 448 void set_adapter_entry(AdapterHandlerEntry* adapter) { _adapter = adapter; } |
449 address get_i2c_entry(); | |
450 address get_c2i_entry(); | |
451 address get_c2i_unverified_entry(); | |
452 AdapterHandlerEntry* adapter() { return _adapter; } | |
453 // setup entry points | |
454 void link_method(methodHandle method, TRAPS); | |
455 // clear entry points. Used by sharing code | |
456 void unlink_method(); | |
457 | |
458 // vtable index | |
459 enum VtableIndexFlag { | |
460 // Valid vtable indexes are non-negative (>= 0). | |
461 // These few negative values are used as sentinels. | |
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462 itable_index_max = -10, // first itable index, growing downward |
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463 pending_itable_index = -9, // itable index will be assigned |
0 | 464 invalid_vtable_index = -4, // distinct from any valid vtable index |
465 garbage_vtable_index = -3, // not yet linked; no vtable layout yet | |
466 nonvirtual_vtable_index = -2 // there is no need for vtable dispatch | |
467 // 6330203 Note: Do not use -1, which was overloaded with many meanings. | |
468 }; | |
469 DEBUG_ONLY(bool valid_vtable_index() const { return _vtable_index >= nonvirtual_vtable_index; }) | |
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470 bool has_vtable_index() const { return _vtable_index >= 0; } |
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471 int vtable_index() const { return _vtable_index; } |
0 | 472 void set_vtable_index(int index) { _vtable_index = index; } |
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473 DEBUG_ONLY(bool valid_itable_index() const { return _vtable_index <= pending_itable_index; }) |
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474 bool has_itable_index() const { return _vtable_index <= itable_index_max; } |
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475 int itable_index() const { assert(valid_itable_index(), ""); |
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476 return itable_index_max - _vtable_index; } |
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477 void set_itable_index(int index) { _vtable_index = itable_index_max - index; assert(valid_itable_index(), ""); } |
0 | 478 |
479 // interpreter entry | |
480 address interpreter_entry() const { return _i2i_entry; } | |
481 // Only used when first initialize so we can set _i2i_entry and _from_interpreted_entry | |
482 void set_interpreter_entry(address entry) { _i2i_entry = entry; _from_interpreted_entry = entry; } | |
483 | |
484 // native function (used for native methods only) | |
485 enum { | |
486 native_bind_event_is_interesting = true | |
487 }; | |
488 address native_function() const { return *(native_function_addr()); } | |
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489 address critical_native_function(); |
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490 |
0 | 491 // Must specify a real function (not NULL). |
492 // Use clear_native_function() to unregister. | |
493 void set_native_function(address function, bool post_event_flag); | |
494 bool has_native_function() const; | |
495 void clear_native_function(); | |
496 | |
497 // signature handler (used for native methods only) | |
498 address signature_handler() const { return *(signature_handler_addr()); } | |
499 void set_signature_handler(address handler); | |
500 | |
501 // Interpreter oopmap support | |
502 void mask_for(int bci, InterpreterOopMap* mask); | |
503 | |
504 #ifndef PRODUCT | |
505 // operations on invocation counter | |
1783 | 506 void print_invocation_count(); |
0 | 507 #endif |
508 | |
509 // byte codes | |
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510 void set_code(address code) { return constMethod()->set_code(code); } |
0 | 511 address code_base() const { return constMethod()->code_base(); } |
512 bool contains(address bcp) const { return constMethod()->contains(bcp); } | |
513 | |
514 // prints byte codes | |
515 void print_codes() const { print_codes_on(tty); } | |
516 void print_codes_on(outputStream* st) const PRODUCT_RETURN; | |
517 void print_codes_on(int from, int to, outputStream* st) const PRODUCT_RETURN; | |
518 | |
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519 // method parameters |
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520 bool has_method_parameters() const |
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521 { return constMethod()->has_method_parameters(); } |
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522 int method_parameters_length() const |
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523 { return constMethod()->method_parameters_length(); } |
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524 MethodParametersElement* method_parameters_start() const |
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525 { return constMethod()->method_parameters_start(); } |
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526 |
0 | 527 // checked exceptions |
528 int checked_exceptions_length() const | |
529 { return constMethod()->checked_exceptions_length(); } | |
530 CheckedExceptionElement* checked_exceptions_start() const | |
531 { return constMethod()->checked_exceptions_start(); } | |
532 | |
533 // localvariable table | |
534 bool has_localvariable_table() const | |
535 { return constMethod()->has_localvariable_table(); } | |
536 int localvariable_table_length() const | |
537 { return constMethod()->localvariable_table_length(); } | |
538 LocalVariableTableElement* localvariable_table_start() const | |
539 { return constMethod()->localvariable_table_start(); } | |
540 | |
541 bool has_linenumber_table() const | |
542 { return constMethod()->has_linenumber_table(); } | |
543 u_char* compressed_linenumber_table() const | |
544 { return constMethod()->compressed_linenumber_table(); } | |
545 | |
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546 // method holder (the Klass* holding this method) |
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547 InstanceKlass* method_holder() const { return constants()->pool_holder(); } |
0 | 548 |
549 void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments) | |
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550 Symbol* klass_name() const; // returns the name of the method holder |
0 | 551 BasicType result_type() const; // type of the method result |
552 int result_type_index() const; // type index of the method result | |
553 bool is_returning_oop() const { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); } | |
554 bool is_returning_fp() const { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); } | |
555 | |
556 // Checked exceptions thrown by this method (resolved to mirrors) | |
557 objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); } | |
558 | |
559 // Access flags | |
560 bool is_public() const { return access_flags().is_public(); } | |
561 bool is_private() const { return access_flags().is_private(); } | |
562 bool is_protected() const { return access_flags().is_protected(); } | |
563 bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); } | |
564 bool is_static() const { return access_flags().is_static(); } | |
565 bool is_final() const { return access_flags().is_final(); } | |
566 bool is_synchronized() const { return access_flags().is_synchronized();} | |
567 bool is_native() const { return access_flags().is_native(); } | |
568 bool is_abstract() const { return access_flags().is_abstract(); } | |
569 bool is_strict() const { return access_flags().is_strict(); } | |
570 bool is_synthetic() const { return access_flags().is_synthetic(); } | |
571 | |
572 // returns true if contains only return operation | |
573 bool is_empty_method() const; | |
574 | |
575 // returns true if this is a vanilla constructor | |
576 bool is_vanilla_constructor() const; | |
577 | |
578 // checks method and its method holder | |
579 bool is_final_method() const; | |
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580 bool is_final_method(AccessFlags class_access_flags) const; |
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581 bool is_default_method() const; |
0 | 582 |
583 // true if method needs no dynamic dispatch (final and/or no vtable entry) | |
584 bool can_be_statically_bound() const; | |
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585 bool can_be_statically_bound(AccessFlags class_access_flags) const; |
0 | 586 |
587 // returns true if the method has any backward branches. | |
588 bool has_loops() { | |
589 return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag(); | |
590 }; | |
591 | |
592 bool compute_has_loops_flag(); | |
593 | |
594 bool has_jsrs() { | |
595 return access_flags().has_jsrs(); | |
596 }; | |
597 void set_has_jsrs() { | |
598 _access_flags.set_has_jsrs(); | |
599 } | |
600 | |
601 // returns true if the method has any monitors. | |
602 bool has_monitors() const { return is_synchronized() || access_flags().has_monitor_bytecodes(); } | |
603 bool has_monitor_bytecodes() const { return access_flags().has_monitor_bytecodes(); } | |
604 | |
605 void set_has_monitor_bytecodes() { _access_flags.set_has_monitor_bytecodes(); } | |
606 | |
607 // monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes | |
608 // propererly nest in the method. It might return false, even though they actually nest properly, since the info. | |
609 // has not been computed yet. | |
610 bool guaranteed_monitor_matching() const { return access_flags().is_monitor_matching(); } | |
611 void set_guaranteed_monitor_matching() { _access_flags.set_monitor_matching(); } | |
612 | |
613 // returns true if the method is an accessor function (setter/getter). | |
614 bool is_accessor() const; | |
615 | |
616 // returns true if the method is an initializer (<init> or <clinit>). | |
617 bool is_initializer() const; | |
618 | |
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619 // returns true if the method is static OR if the classfile version < 51 |
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620 bool has_valid_initializer_flags() const; |
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621 |
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622 // returns true if the method name is <clinit> and the method has |
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623 // valid static initializer flags. |
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624 bool is_static_initializer() const; |
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625 |
0 | 626 // compiled code support |
627 // NOTE: code() is inherently racy as deopt can be clearing code | |
628 // simultaneously. Use with caution. | |
629 bool has_compiled_code() const { return code() != NULL; } | |
630 | |
631 // sizing | |
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632 static int header_size() { return sizeof(Method)/HeapWordSize; } |
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633 static int size(bool is_native); |
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634 int size() const { return method_size(); } |
7956 | 635 #if INCLUDE_SERVICES |
636 void collect_statistics(KlassSizeStats *sz) const; | |
637 #endif | |
0 | 638 |
639 // interpreter support | |
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640 static ByteSize const_offset() { return byte_offset_of(Method, _constMethod ); } |
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641 static ByteSize access_flags_offset() { return byte_offset_of(Method, _access_flags ); } |
0 | 642 #ifdef CC_INTERP |
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643 static ByteSize result_index_offset() { return byte_offset_of(Method, _result_index ); } |
0 | 644 #endif /* CC_INTERP */ |
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645 static ByteSize from_compiled_offset() { return byte_offset_of(Method, _from_compiled_entry); } |
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646 static ByteSize code_offset() { return byte_offset_of(Method, _code); } |
0 | 647 static ByteSize method_data_offset() { |
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648 return byte_offset_of(Method, _method_data); |
0 | 649 } |
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650 static ByteSize method_counters_offset() { |
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651 return byte_offset_of(Method, _method_counters); |
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652 } |
0 | 653 #ifndef PRODUCT |
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654 static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(Method, _compiled_invocation_count); } |
0 | 655 #endif // not PRODUCT |
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656 static ByteSize native_function_offset() { return in_ByteSize(sizeof(Method)); } |
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657 static ByteSize from_interpreted_offset() { return byte_offset_of(Method, _from_interpreted_entry ); } |
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658 static ByteSize interpreter_entry_offset() { return byte_offset_of(Method, _i2i_entry ); } |
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659 static ByteSize signature_handler_offset() { return in_ByteSize(sizeof(Method) + wordSize); } |
0 | 660 |
661 // for code generation | |
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662 static int method_data_offset_in_bytes() { return offset_of(Method, _method_data); } |
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663 static int intrinsic_id_offset_in_bytes() { return offset_of(Method, _intrinsic_id); } |
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664 static int intrinsic_id_size_in_bytes() { return sizeof(u1); } |
0 | 665 |
666 // Static methods that are used to implement member methods where an exposed this pointer | |
667 // is needed due to possible GCs | |
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668 static objArrayHandle resolved_checked_exceptions_impl(Method* this_oop, TRAPS); |
0 | 669 |
670 // Returns the byte code index from the byte code pointer | |
671 int bci_from(address bcp) const; | |
672 address bcp_from(int bci) const; | |
673 int validate_bci_from_bcx(intptr_t bcx) const; | |
674 | |
675 // Returns the line number for a bci if debugging information for the method is prowided, | |
676 // -1 is returned otherwise. | |
677 int line_number_from_bci(int bci) const; | |
678 | |
679 // Reflection support | |
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680 bool is_overridden_in(Klass* k) const; |
0 | 681 |
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682 // Stack walking support |
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683 bool is_ignored_by_security_stack_walk() const; |
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684 |
710 | 685 // JSR 292 support |
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686 bool is_method_handle_intrinsic() const; // MethodHandles::is_signature_polymorphic_intrinsic(intrinsic_id) |
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687 bool is_compiled_lambda_form() const; // intrinsic_id() == vmIntrinsics::_compiledLambdaForm |
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688 bool has_member_arg() const; // intrinsic_id() == vmIntrinsics::_linkToSpecial, etc. |
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689 static methodHandle make_method_handle_intrinsic(vmIntrinsics::ID iid, // _invokeBasic, _linkToVirtual |
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690 Symbol* signature, //anything at all |
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691 TRAPS); |
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692 static Klass* check_non_bcp_klass(Klass* klass); |
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693 |
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694 // How many extra stack entries for invokedynamic when it's enabled |
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695 static const int extra_stack_entries_for_jsr292 = 1; |
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696 |
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697 // this operates only on invoke methods: |
710 | 698 // presize interpreter frames for extra interpreter stack entries, if needed |
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699 // Account for the extra appendix argument for invokehandle/invokedynamic |
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700 static int extra_stack_entries() { return EnableInvokeDynamic ? extra_stack_entries_for_jsr292 : 0; } |
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701 static int extra_stack_words(); // = extra_stack_entries() * Interpreter::stackElementSize |
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702 |
0 | 703 // RedefineClasses() support: |
704 bool is_old() const { return access_flags().is_old(); } | |
705 void set_is_old() { _access_flags.set_is_old(); } | |
706 bool is_obsolete() const { return access_flags().is_obsolete(); } | |
707 void set_is_obsolete() { _access_flags.set_is_obsolete(); } | |
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708 bool on_stack() const { return access_flags().on_stack(); } |
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709 void set_on_stack(const bool value); |
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710 |
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711 // see the definition in Method*.cpp for the gory details |
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712 bool should_not_be_cached() const; |
0 | 713 |
714 // JVMTI Native method prefixing support: | |
715 bool is_prefixed_native() const { return access_flags().is_prefixed_native(); } | |
716 void set_is_prefixed_native() { _access_flags.set_is_prefixed_native(); } | |
717 | |
718 // Rewriting support | |
719 static methodHandle clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length, | |
720 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS); | |
721 | |
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722 // jmethodID handling |
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723 // Because the useful life-span of a jmethodID cannot be determined, |
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724 // once created they are never reclaimed. The methods to which they refer, |
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725 // however, can be GC'ed away if the class is unloaded or if the method is |
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726 // made obsolete or deleted -- in these cases, the jmethodID |
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727 // refers to NULL (as is the case for any weak reference). |
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728 static jmethodID make_jmethod_id(ClassLoaderData* loader_data, Method* mh); |
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729 static void destroy_jmethod_id(ClassLoaderData* loader_data, jmethodID mid); |
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730 |
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731 // Use resolve_jmethod_id() in situations where the caller is expected |
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732 // to provide a valid jmethodID; the only sanity checks are in asserts; |
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733 // result guaranteed not to be NULL. |
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734 inline static Method* resolve_jmethod_id(jmethodID mid) { |
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735 assert(mid != NULL, "JNI method id should not be null"); |
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736 return *((Method**)mid); |
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737 } |
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738 |
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739 // Use checked_resolve_jmethod_id() in situations where the caller |
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740 // should provide a valid jmethodID, but might not. NULL is returned |
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741 // when the jmethodID does not refer to a valid method. |
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742 static Method* checked_resolve_jmethod_id(jmethodID mid); |
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743 |
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744 static void change_method_associated_with_jmethod_id(jmethodID old_jmid_ptr, Method* new_method); |
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745 static bool is_method_id(jmethodID mid); |
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746 |
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747 // Clear methods |
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748 static void clear_jmethod_ids(ClassLoaderData* loader_data); |
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749 static void print_jmethod_ids(ClassLoaderData* loader_data, outputStream* out) PRODUCT_RETURN; |
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750 |
0 | 751 // Get this method's jmethodID -- allocate if it doesn't exist |
752 jmethodID jmethod_id() { methodHandle this_h(this); | |
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753 return InstanceKlass::get_jmethod_id(method_holder(), this_h); } |
0 | 754 |
755 // Lookup the jmethodID for this method. Return NULL if not found. | |
756 // NOTE that this function can be called from a signal handler | |
757 // (see AsyncGetCallTrace support for Forte Analyzer) and this | |
758 // needs to be async-safe. No allocation should be done and | |
759 // so handles are not used to avoid deadlock. | |
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760 jmethodID find_jmethod_id_or_null() { return method_holder()->jmethod_id_or_null(this); } |
0 | 761 |
762 // Support for inlining of intrinsic methods | |
856
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763 vmIntrinsics::ID intrinsic_id() const { return (vmIntrinsics::ID) _intrinsic_id; } |
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764 void set_intrinsic_id(vmIntrinsics::ID id) { _intrinsic_id = (u1) id; } |
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765 |
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766 // Helper routines for intrinsic_id() and vmIntrinsics::method(). |
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767 void init_intrinsic_id(); // updates from _none if a match |
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768 static vmSymbols::SID klass_id_for_intrinsics(Klass* holder); |
0 | 769 |
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770 bool jfr_towrite() { |
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771 return (_flags & _jfr_towrite) != 0; |
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772 } |
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773 void set_jfr_towrite(bool x) { |
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774 _flags = x ? (_flags | _jfr_towrite) : (_flags & ~_jfr_towrite); |
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775 } |
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776 |
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777 bool caller_sensitive() { |
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778 return (_flags & _caller_sensitive) != 0; |
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779 } |
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780 void set_caller_sensitive(bool x) { |
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781 _flags = x ? (_flags | _caller_sensitive) : (_flags & ~_caller_sensitive); |
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782 } |
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783 |
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784 bool force_inline() { |
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785 return (_flags & _force_inline) != 0; |
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786 } |
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787 void set_force_inline(bool x) { |
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788 _flags = x ? (_flags | _force_inline) : (_flags & ~_force_inline); |
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789 } |
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790 |
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791 bool dont_inline() { |
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792 return (_flags & _dont_inline) != 0; |
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793 } |
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794 void set_dont_inline(bool x) { |
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795 _flags = x ? (_flags | _dont_inline) : (_flags & ~_dont_inline); |
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796 } |
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797 |
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798 bool is_hidden() { |
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799 return (_flags & _hidden) != 0; |
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800 } |
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801 void set_hidden(bool x) { |
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802 _flags = x ? (_flags | _hidden) : (_flags & ~_hidden); |
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803 } |
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804 |
6934 | 805 ConstMethod::MethodType method_type() const { |
806 return _constMethod->method_type(); | |
807 } | |
808 bool is_overpass() const { return method_type() == ConstMethod::OVERPASS; } | |
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809 |
0 | 810 // On-stack replacement support |
1783 | 811 bool has_osr_nmethod(int level, bool match_level) { |
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812 return method_holder()->lookup_osr_nmethod(this, InvocationEntryBci, level, match_level) != NULL; |
1783 | 813 } |
814 | |
815 nmethod* lookup_osr_nmethod_for(int bci, int level, bool match_level) { | |
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816 return method_holder()->lookup_osr_nmethod(this, bci, level, match_level); |
1783 | 817 } |
0 | 818 |
819 // Inline cache support | |
820 void cleanup_inline_caches(); | |
821 | |
822 // Find if klass for method is loaded | |
823 bool is_klass_loaded_by_klass_index(int klass_index) const; | |
824 bool is_klass_loaded(int refinfo_index, bool must_be_resolved = false) const; | |
825 | |
826 // Indicates whether compilation failed earlier for this method, or | |
827 // whether it is not compilable for another reason like having a | |
828 // breakpoint set in it. | |
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829 bool is_not_compilable(int comp_level = CompLevel_any) const; |
7998 | 830 void set_not_compilable(int comp_level = CompLevel_all, bool report = true, const char* reason = NULL); |
1783 | 831 void set_not_compilable_quietly(int comp_level = CompLevel_all) { |
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832 set_not_compilable(comp_level, false); |
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833 } |
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834 bool is_not_osr_compilable(int comp_level = CompLevel_any) const; |
7998 | 835 void set_not_osr_compilable(int comp_level = CompLevel_all, bool report = true, const char* reason = NULL); |
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836 void set_not_osr_compilable_quietly(int comp_level = CompLevel_all) { |
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837 set_not_osr_compilable(comp_level, false); |
1783 | 838 } |
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839 bool is_always_compilable() const; |
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840 |
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841 private: |
7998 | 842 void print_made_not_compilable(int comp_level, bool is_osr, bool report, const char* reason); |
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843 |
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844 public: |
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845 MethodCounters* get_method_counters(TRAPS) { |
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846 if (_method_counters == NULL) { |
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847 build_method_counters(this, CHECK_AND_CLEAR_NULL); |
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848 } |
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849 return _method_counters; |
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850 } |
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851 |
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852 bool is_not_c1_compilable() const { return access_flags().is_not_c1_compilable(); } |
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853 void set_not_c1_compilable() { _access_flags.set_not_c1_compilable(); } |
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854 void clear_not_c1_compilable() { _access_flags.clear_not_c1_compilable(); } |
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855 bool is_not_c2_compilable() const { return access_flags().is_not_c2_compilable(); } |
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856 void set_not_c2_compilable() { _access_flags.set_not_c2_compilable(); } |
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857 void clear_not_c2_compilable() { _access_flags.clear_not_c2_compilable(); } |
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858 |
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859 bool is_not_c1_osr_compilable() const { return is_not_c1_compilable(); } // don't waste an accessFlags bit |
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860 void set_not_c1_osr_compilable() { set_not_c1_compilable(); } // don't waste an accessFlags bit |
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861 void clear_not_c1_osr_compilable() { clear_not_c1_compilable(); } // don't waste an accessFlags bit |
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862 bool is_not_c2_osr_compilable() const { return access_flags().is_not_c2_osr_compilable(); } |
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863 void set_not_c2_osr_compilable() { _access_flags.set_not_c2_osr_compilable(); } |
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864 void clear_not_c2_osr_compilable() { _access_flags.clear_not_c2_osr_compilable(); } |
0 | 865 |
866 // Background compilation support | |
1783 | 867 bool queued_for_compilation() const { return access_flags().queued_for_compilation(); } |
868 void set_queued_for_compilation() { _access_flags.set_queued_for_compilation(); } | |
869 void clear_queued_for_compilation() { _access_flags.clear_queued_for_compilation(); } | |
0 | 870 |
871 // Resolve all classes in signature, return 'true' if successful | |
872 static bool load_signature_classes(methodHandle m, TRAPS); | |
873 | |
874 // Return if true if not all classes references in signature, including return type, has been loaded | |
875 static bool has_unloaded_classes_in_signature(methodHandle m, TRAPS); | |
876 | |
877 // Printing | |
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878 void print_short_name(outputStream* st = tty); // prints as klassname::methodname; Exposed so field engineers can debug VM |
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879 #if INCLUDE_JVMTI |
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880 void print_name(outputStream* st = tty); // prints as "virtual void foo(int)"; exposed for TraceRedefineClasses |
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881 #else |
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882 void print_name(outputStream* st = tty) PRODUCT_RETURN; // prints as "virtual void foo(int)" |
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883 #endif |
0 | 884 |
885 // Helper routine used for method sorting | |
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886 static void sort_methods(Array<Method*>* methods, bool idempotent = false, bool set_idnums = true); |
0 | 887 |
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888 // Deallocation function for redefine classes or if an error occurs |
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889 void deallocate_contents(ClassLoaderData* loader_data); |
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890 |
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891 // Printing |
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892 #ifndef PRODUCT |
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893 void print_on(outputStream* st) const; |
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894 #endif |
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895 void print_value_on(outputStream* st) const; |
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896 |
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897 const char* internal_name() const { return "{method}"; } |
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898 |
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899 // Check for valid method pointer |
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900 static bool has_method_vptr(const void* ptr); |
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901 bool is_valid_method() const; |
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902 |
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903 // Verify |
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904 void verify() { verify_on(tty); } |
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905 void verify_on(outputStream* st); |
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906 |
0 | 907 private: |
908 | |
909 // Inlined elements | |
910 address* native_function_addr() const { assert(is_native(), "must be native"); return (address*) (this+1); } | |
911 address* signature_handler_addr() const { return native_function_addr() + 1; } | |
912 }; | |
913 | |
914 | |
915 // Utility class for compressing line number tables | |
916 | |
917 class CompressedLineNumberWriteStream: public CompressedWriteStream { | |
918 private: | |
919 int _bci; | |
920 int _line; | |
921 public: | |
922 // Constructor | |
923 CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {} | |
924 CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {} | |
925 | |
926 // Write (bci, line number) pair to stream | |
927 void write_pair_regular(int bci_delta, int line_delta); | |
928 | |
929 inline void write_pair_inline(int bci, int line) { | |
930 int bci_delta = bci - _bci; | |
931 int line_delta = line - _line; | |
932 _bci = bci; | |
933 _line = line; | |
934 // Skip (0,0) deltas - they do not add information and conflict with terminator. | |
935 if (bci_delta == 0 && line_delta == 0) return; | |
936 // Check if bci is 5-bit and line number 3-bit unsigned. | |
937 if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) { | |
938 // Compress into single byte. | |
939 jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta; | |
940 // Check that value doesn't match escape character. | |
941 if (value != 0xFF) { | |
942 write_byte(value); | |
943 return; | |
944 } | |
945 } | |
946 write_pair_regular(bci_delta, line_delta); | |
947 } | |
948 | |
949 // Windows AMD64 + Apr 2005 PSDK with /O2 generates bad code for write_pair. | |
950 // Disabling optimization doesn't work for methods in header files | |
951 // so we force it to call through the non-optimized version in the .cpp. | |
952 // It's gross, but it's the only way we can ensure that all callers are | |
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953 // fixed. _MSC_VER is defined by the windows compiler |
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954 #if defined(_M_AMD64) && _MSC_VER >= 1400 |
0 | 955 void write_pair(int bci, int line); |
956 #else | |
957 void write_pair(int bci, int line) { write_pair_inline(bci, line); } | |
958 #endif | |
959 | |
960 // Write end-of-stream marker | |
961 void write_terminator() { write_byte(0); } | |
962 }; | |
963 | |
964 | |
965 // Utility class for decompressing line number tables | |
966 | |
967 class CompressedLineNumberReadStream: public CompressedReadStream { | |
968 private: | |
969 int _bci; | |
970 int _line; | |
971 public: | |
972 // Constructor | |
973 CompressedLineNumberReadStream(u_char* buffer); | |
974 // Read (bci, line number) pair from stream. Returns false at end-of-stream. | |
975 bool read_pair(); | |
976 // Accessing bci and line number (after calling read_pair) | |
977 int bci() const { return _bci; } | |
978 int line() const { return _line; } | |
979 }; | |
980 | |
981 | |
982 /// Fast Breakpoints. | |
983 | |
984 // If this structure gets more complicated (because bpts get numerous), | |
985 // move it into its own header. | |
986 | |
987 // There is presently no provision for concurrent access | |
988 // to breakpoint lists, which is only OK for JVMTI because | |
989 // breakpoints are written only at safepoints, and are read | |
990 // concurrently only outside of safepoints. | |
991 | |
6197 | 992 class BreakpointInfo : public CHeapObj<mtClass> { |
0 | 993 friend class VMStructs; |
994 private: | |
995 Bytecodes::Code _orig_bytecode; | |
996 int _bci; | |
997 u2 _name_index; // of method | |
998 u2 _signature_index; // of method | |
999 BreakpointInfo* _next; // simple storage allocation | |
1000 | |
1001 public: | |
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1002 BreakpointInfo(Method* m, int bci); |
0 | 1003 |
1004 // accessors | |
1005 Bytecodes::Code orig_bytecode() { return _orig_bytecode; } | |
1006 void set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; } | |
1007 int bci() { return _bci; } | |
1008 | |
1009 BreakpointInfo* next() const { return _next; } | |
1010 void set_next(BreakpointInfo* n) { _next = n; } | |
1011 | |
1012 // helps for searchers | |
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1013 bool match(const Method* m, int bci) { |
0 | 1014 return bci == _bci && match(m); |
1015 } | |
1016 | |
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1017 bool match(const Method* m) { |
0 | 1018 return _name_index == m->name_index() && |
1019 _signature_index == m->signature_index(); | |
1020 } | |
1021 | |
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1022 void set(Method* method); |
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1023 void clear(Method* method); |
0 | 1024 }; |
1972 | 1025 |
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1026 // Utility class for access exception handlers |
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1027 class ExceptionTable : public StackObj { |
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1028 private: |
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1029 ExceptionTableElement* _table; |
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1030 u2 _length; |
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1031 |
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1032 public: |
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1033 ExceptionTable(const Method* m) { |
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1034 if (m->has_exception_handler()) { |
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1035 _table = m->exception_table_start(); |
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1036 _length = m->exception_table_length(); |
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1037 } else { |
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1038 _table = NULL; |
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1039 _length = 0; |
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1040 } |
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1041 } |
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1042 |
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1043 int length() const { |
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1044 return _length; |
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1045 } |
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1046 |
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1047 u2 start_pc(int idx) const { |
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1048 assert(idx < _length, "out of bounds"); |
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1049 return _table[idx].start_pc; |
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1050 } |
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1051 |
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1052 void set_start_pc(int idx, u2 value) { |
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1053 assert(idx < _length, "out of bounds"); |
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1054 _table[idx].start_pc = value; |
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1055 } |
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1056 |
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1057 u2 end_pc(int idx) const { |
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1058 assert(idx < _length, "out of bounds"); |
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1059 return _table[idx].end_pc; |
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1060 } |
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1061 |
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1062 void set_end_pc(int idx, u2 value) { |
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1063 assert(idx < _length, "out of bounds"); |
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1064 _table[idx].end_pc = value; |
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1065 } |
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1066 |
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1067 u2 handler_pc(int idx) const { |
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1068 assert(idx < _length, "out of bounds"); |
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1069 return _table[idx].handler_pc; |
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1070 } |
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1071 |
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1072 void set_handler_pc(int idx, u2 value) { |
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1073 assert(idx < _length, "out of bounds"); |
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1074 _table[idx].handler_pc = value; |
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1075 } |
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1076 |
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1077 u2 catch_type_index(int idx) const { |
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1078 assert(idx < _length, "out of bounds"); |
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1079 return _table[idx].catch_type_index; |
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1080 } |
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1081 |
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1082 void set_catch_type_index(int idx, u2 value) { |
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1083 assert(idx < _length, "out of bounds"); |
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1084 _table[idx].catch_type_index = value; |
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1085 } |
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1086 }; |
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1087 |
1972 | 1088 #endif // SHARE_VM_OOPS_METHODOOP_HPP |