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annotate src/share/vm/oops/method.hpp @ 17362:03eef43d364f
mx: fix {,scala}dacapo paths and parsing issues on windows
author | Bernhard Urban <bernhard.urban@jku.at> |
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date | Tue, 07 Oct 2014 02:56:42 -0700 |
parents | 4ca6dc0799b6 |
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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 | |
14909 | 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 // | |
14909 | 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 // |------------------------------------------------------| | |
14909 | 67 // | ConstMethod* (oop) | |
0 | 68 // |------------------------------------------------------| |
14909 | 69 // | methodData (oop) | |
70 // | methodCounters | | |
0 | 71 // |------------------------------------------------------| |
72 // | access_flags | | |
73 // | vtable_index | | |
74 // |------------------------------------------------------| | |
75 // | result_index (C++ interpreter only) | | |
76 // |------------------------------------------------------| | |
14909 | 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 |
0 | 163 // accessors for instance variables |
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164 |
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165 ConstMethod* constMethod() const { return _constMethod; } |
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166 void set_constMethod(ConstMethod* xconst) { _constMethod = xconst; } |
0 | 167 |
168 | |
169 static address make_adapters(methodHandle mh, TRAPS); | |
170 volatile address from_compiled_entry() const { return (address)OrderAccess::load_ptr_acquire(&_from_compiled_entry); } | |
171 volatile address from_interpreted_entry() const{ return (address)OrderAccess::load_ptr_acquire(&_from_interpreted_entry); } | |
172 | |
173 // access flag | |
174 AccessFlags access_flags() const { return _access_flags; } | |
175 void set_access_flags(AccessFlags flags) { _access_flags = flags; } | |
176 | |
177 // name | |
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178 Symbol* name() const { return constants()->symbol_at(name_index()); } |
0 | 179 int name_index() const { return constMethod()->name_index(); } |
180 void set_name_index(int index) { constMethod()->set_name_index(index); } | |
181 | |
182 // signature | |
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183 Symbol* signature() const { return constants()->symbol_at(signature_index()); } |
0 | 184 int signature_index() const { return constMethod()->signature_index(); } |
185 void set_signature_index(int index) { constMethod()->set_signature_index(index); } | |
186 | |
187 // generics support | |
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188 Symbol* generic_signature() const { int idx = generic_signature_index(); return ((idx != 0) ? constants()->symbol_at(idx) : (Symbol*)NULL); } |
0 | 189 int generic_signature_index() const { return constMethod()->generic_signature_index(); } |
190 void set_generic_signature_index(int index) { constMethod()->set_generic_signature_index(index); } | |
191 | |
192 // annotations support | |
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193 AnnotationArray* annotations() const { |
8031 | 194 return constMethod()->method_annotations(); |
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195 } |
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196 AnnotationArray* parameter_annotations() const { |
8031 | 197 return constMethod()->parameter_annotations(); |
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198 } |
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199 AnnotationArray* annotation_default() const { |
8031 | 200 return constMethod()->default_annotations(); |
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201 } |
8031 | 202 AnnotationArray* type_annotations() const { |
203 return constMethod()->type_annotations(); | |
204 } | |
0 | 205 |
206 #ifdef CC_INTERP | |
207 void set_result_index(BasicType type); | |
208 int result_index() { return _result_index; } | |
209 #endif | |
210 | |
211 // Helper routine: get klass name + "." + method name + signature as | |
212 // C string, for the purpose of providing more useful NoSuchMethodErrors | |
213 // and fatal error handling. The string is allocated in resource | |
214 // area if a buffer is not provided by the caller. | |
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215 char* name_and_sig_as_C_string() const; |
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216 char* name_and_sig_as_C_string(char* buf, int size) const; |
0 | 217 |
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218 // Static routine in the situations we don't have a Method* |
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219 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature); |
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220 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size); |
0 | 221 |
2142 | 222 Bytecodes::Code java_code_at(int bci) const { |
223 return Bytecodes::java_code_at(this, bcp_from(bci)); | |
224 } | |
225 Bytecodes::Code code_at(int bci) const { | |
226 return Bytecodes::code_at(this, bcp_from(bci)); | |
227 } | |
228 | |
0 | 229 // JVMTI breakpoints |
2142 | 230 Bytecodes::Code orig_bytecode_at(int bci) const; |
0 | 231 void set_orig_bytecode_at(int bci, Bytecodes::Code code); |
232 void set_breakpoint(int bci); | |
233 void clear_breakpoint(int bci); | |
234 void clear_all_breakpoints(); | |
235 // Tracking number of breakpoints, for fullspeed debugging. | |
236 // Only mutated by VM thread. | |
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237 u2 number_of_breakpoints() const { |
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238 if (method_counters() == NULL) { |
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239 return 0; |
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240 } else { |
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241 return method_counters()->number_of_breakpoints(); |
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242 } |
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243 } |
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244 void incr_number_of_breakpoints(TRAPS) { |
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245 MethodCounters* mcs = get_method_counters(CHECK); |
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246 if (mcs != NULL) { |
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247 mcs->incr_number_of_breakpoints(); |
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248 } |
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249 } |
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250 void decr_number_of_breakpoints(TRAPS) { |
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251 MethodCounters* mcs = get_method_counters(CHECK); |
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252 if (mcs != NULL) { |
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253 mcs->decr_number_of_breakpoints(); |
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254 } |
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255 } |
0 | 256 // Initialization only |
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257 void clear_number_of_breakpoints() { |
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258 if (method_counters() != NULL) { |
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259 method_counters()->clear_number_of_breakpoints(); |
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260 } |
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261 } |
0 | 262 |
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263 // index into InstanceKlass methods() array |
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264 // note: also used by jfr |
0 | 265 u2 method_idnum() const { return constMethod()->method_idnum(); } |
266 void set_method_idnum(u2 idnum) { constMethod()->set_method_idnum(idnum); } | |
267 | |
268 // code size | |
269 int code_size() const { return constMethod()->code_size(); } | |
270 | |
271 // method size | |
272 int method_size() const { return _method_size; } | |
273 void set_method_size(int size) { | |
274 assert(0 <= size && size < (1 << 16), "invalid method size"); | |
275 _method_size = size; | |
276 } | |
277 | |
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278 // constant pool for Klass* holding this method |
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279 ConstantPool* constants() const { return constMethod()->constants(); } |
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280 void set_constants(ConstantPool* c) { constMethod()->set_constants(c); } |
0 | 281 |
282 // max stack | |
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283 // return original max stack size for method verification |
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284 int verifier_max_stack() const { return constMethod()->max_stack(); } |
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285 int max_stack() const { return constMethod()->max_stack() + extra_stack_entries(); } |
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286 void set_max_stack(int size) { constMethod()->set_max_stack(size); } |
0 | 287 |
288 // max locals | |
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289 int max_locals() const { return constMethod()->max_locals(); } |
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290 void set_max_locals(int size) { constMethod()->set_max_locals(size); } |
1783 | 291 |
292 int highest_comp_level() const; | |
293 void set_highest_comp_level(int level); | |
294 int highest_osr_comp_level() const; | |
295 void set_highest_osr_comp_level(int level); | |
0 | 296 |
297 // Count of times method was exited via exception while interpreting | |
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298 void interpreter_throwout_increment(TRAPS) { |
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299 MethodCounters* mcs = get_method_counters(CHECK); |
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300 if (mcs != NULL) { |
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301 mcs->interpreter_throwout_increment(); |
0 | 302 } |
303 } | |
304 | |
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305 int interpreter_throwout_count() const { |
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306 if (method_counters() == NULL) { |
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307 return 0; |
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308 } else { |
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309 return method_counters()->interpreter_throwout_count(); |
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310 } |
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311 } |
0 | 312 |
313 // size of parameters | |
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314 int size_of_parameters() const { return constMethod()->size_of_parameters(); } |
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315 void set_size_of_parameters(int size) { constMethod()->set_size_of_parameters(size); } |
0 | 316 |
317 bool has_stackmap_table() const { | |
318 return constMethod()->has_stackmap_table(); | |
319 } | |
320 | |
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321 Array<u1>* stackmap_data() const { |
0 | 322 return constMethod()->stackmap_data(); |
323 } | |
324 | |
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325 void set_stackmap_data(Array<u1>* sd) { |
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326 constMethod()->set_stackmap_data(sd); |
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327 } |
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328 |
0 | 329 // exception handler table |
330 bool has_exception_handler() const | |
331 { return constMethod()->has_exception_handler(); } | |
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332 int exception_table_length() const |
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333 { return constMethod()->exception_table_length(); } |
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334 ExceptionTableElement* exception_table_start() const |
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335 { return constMethod()->exception_table_start(); } |
0 | 336 |
337 // Finds the first entry point bci of an exception handler for an | |
338 // exception of klass ex_klass thrown at throw_bci. A value of NULL | |
339 // for ex_klass indicates that the exception klass is not known; in | |
340 // this case it matches any constraint class. Returns -1 if the | |
341 // exception cannot be handled in this method. The handler | |
342 // constraint classes are loaded if necessary. Note that this may | |
343 // throw an exception if loading of the constraint classes causes | |
344 // an IllegalAccessError (bugid 4307310) or an OutOfMemoryError. | |
345 // If an exception is thrown, returns the bci of the | |
346 // exception handler which caused the exception to be thrown, which | |
347 // is needed for proper retries. See, for example, | |
348 // InterpreterRuntime::exception_handler_for_exception. | |
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349 static int fast_exception_handler_bci_for(methodHandle mh, KlassHandle ex_klass, int throw_bci, TRAPS); |
0 | 350 |
351 // method data access | |
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352 MethodData* method_data() const { |
0 | 353 return _method_data; |
354 } | |
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355 |
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356 void set_method_data(MethodData* data) { |
14909 | 357 _method_data = data; |
0 | 358 } |
359 | |
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360 MethodCounters* method_counters() const { |
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361 return _method_counters; |
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362 } |
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363 |
14909 | 364 |
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365 void set_method_counters(MethodCounters* counters) { |
14909 | 366 _method_counters = counters; |
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367 } |
1783 | 368 |
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369 #ifdef TIERED |
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370 // We are reusing interpreter_invocation_count as a holder for the previous event count! |
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371 // We can do that since interpreter_invocation_count is not used in tiered. |
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372 int prev_event_count() const { |
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373 if (method_counters() == NULL) { |
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374 return 0; |
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375 } else { |
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376 return method_counters()->interpreter_invocation_count(); |
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377 } |
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378 } |
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379 void set_prev_event_count(int count, TRAPS) { |
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380 MethodCounters* mcs = get_method_counters(CHECK); |
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381 if (mcs != NULL) { |
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382 mcs->set_interpreter_invocation_count(count); |
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383 } |
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384 } |
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385 jlong prev_time() const { |
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386 return method_counters() == NULL ? 0 : method_counters()->prev_time(); |
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387 } |
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388 void set_prev_time(jlong time, TRAPS) { |
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389 MethodCounters* mcs = get_method_counters(CHECK); |
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390 if (mcs != NULL) { |
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391 mcs->set_prev_time(time); |
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392 } |
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393 } |
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394 float rate() const { |
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395 return method_counters() == NULL ? 0 : method_counters()->rate(); |
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396 } |
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397 void set_rate(float rate, TRAPS) { |
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398 MethodCounters* mcs = get_method_counters(CHECK); |
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399 if (mcs != NULL) { |
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400 mcs->set_rate(rate); |
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401 } |
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402 } |
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403 #endif |
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404 |
1783 | 405 int invocation_count(); |
406 int backedge_count(); | |
407 | |
408 bool was_executed_more_than(int n); | |
409 bool was_never_executed() { return !was_executed_more_than(0); } | |
0 | 410 |
411 static void build_interpreter_method_data(methodHandle method, TRAPS); | |
412 | |
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413 static MethodCounters* build_method_counters(Method* m, TRAPS); |
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414 |
1783 | 415 int interpreter_invocation_count() { |
416 if (TieredCompilation) return invocation_count(); | |
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417 else return (method_counters() == NULL) ? 0 : |
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418 method_counters()->interpreter_invocation_count(); |
1783 | 419 } |
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420 int increment_interpreter_invocation_count(TRAPS) { |
1783 | 421 if (TieredCompilation) ShouldNotReachHere(); |
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422 MethodCounters* mcs = get_method_counters(CHECK_0); |
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423 return (mcs == NULL) ? 0 : mcs->increment_interpreter_invocation_count(); |
1783 | 424 } |
0 | 425 |
426 #ifndef PRODUCT | |
1783 | 427 int compiled_invocation_count() const { return _compiled_invocation_count; } |
0 | 428 void set_compiled_invocation_count(int count) { _compiled_invocation_count = count; } |
429 #endif // not PRODUCT | |
430 | |
605 | 431 // Clear (non-shared space) pointers which could not be relevant |
0 | 432 // if this (shared) method were mapped into another JVM. |
433 void remove_unshareable_info(); | |
434 | |
435 // nmethod/verified compiler entry | |
436 address verified_code_entry(); | |
437 bool check_code() const; // Not inline to avoid circular ref | |
438 nmethod* volatile code() const { assert( check_code(), "" ); return (nmethod *)OrderAccess::load_ptr_acquire(&_code); } | |
439 void clear_code(); // Clear out any compiled code | |
1202 | 440 static void set_code(methodHandle mh, nmethod* code); |
0 | 441 void set_adapter_entry(AdapterHandlerEntry* adapter) { _adapter = adapter; } |
442 address get_i2c_entry(); | |
443 address get_c2i_entry(); | |
444 address get_c2i_unverified_entry(); | |
445 AdapterHandlerEntry* adapter() { return _adapter; } | |
446 // setup entry points | |
447 void link_method(methodHandle method, TRAPS); | |
448 // clear entry points. Used by sharing code | |
449 void unlink_method(); | |
450 | |
451 // vtable index | |
452 enum VtableIndexFlag { | |
453 // Valid vtable indexes are non-negative (>= 0). | |
454 // These few negative values are used as sentinels. | |
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455 itable_index_max = -10, // first itable index, growing downward |
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456 pending_itable_index = -9, // itable index will be assigned |
0 | 457 invalid_vtable_index = -4, // distinct from any valid vtable index |
458 garbage_vtable_index = -3, // not yet linked; no vtable layout yet | |
459 nonvirtual_vtable_index = -2 // there is no need for vtable dispatch | |
460 // 6330203 Note: Do not use -1, which was overloaded with many meanings. | |
461 }; | |
462 DEBUG_ONLY(bool valid_vtable_index() const { return _vtable_index >= nonvirtual_vtable_index; }) | |
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463 bool has_vtable_index() const { return _vtable_index >= 0; } |
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464 int vtable_index() const { return _vtable_index; } |
0 | 465 void set_vtable_index(int index) { _vtable_index = index; } |
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466 DEBUG_ONLY(bool valid_itable_index() const { return _vtable_index <= pending_itable_index; }) |
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467 bool has_itable_index() const { return _vtable_index <= itable_index_max; } |
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468 int itable_index() const { assert(valid_itable_index(), ""); |
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469 return itable_index_max - _vtable_index; } |
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470 void set_itable_index(int index) { _vtable_index = itable_index_max - index; assert(valid_itable_index(), ""); } |
0 | 471 |
472 // interpreter entry | |
473 address interpreter_entry() const { return _i2i_entry; } | |
474 // Only used when first initialize so we can set _i2i_entry and _from_interpreted_entry | |
475 void set_interpreter_entry(address entry) { _i2i_entry = entry; _from_interpreted_entry = entry; } | |
476 | |
477 // native function (used for native methods only) | |
478 enum { | |
479 native_bind_event_is_interesting = true | |
480 }; | |
481 address native_function() const { return *(native_function_addr()); } | |
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482 address critical_native_function(); |
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483 |
0 | 484 // Must specify a real function (not NULL). |
485 // Use clear_native_function() to unregister. | |
486 void set_native_function(address function, bool post_event_flag); | |
487 bool has_native_function() const; | |
488 void clear_native_function(); | |
489 | |
490 // signature handler (used for native methods only) | |
491 address signature_handler() const { return *(signature_handler_addr()); } | |
492 void set_signature_handler(address handler); | |
493 | |
494 // Interpreter oopmap support | |
495 void mask_for(int bci, InterpreterOopMap* mask); | |
496 | |
497 #ifndef PRODUCT | |
498 // operations on invocation counter | |
1783 | 499 void print_invocation_count(); |
0 | 500 #endif |
501 | |
502 // byte codes | |
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503 void set_code(address code) { return constMethod()->set_code(code); } |
0 | 504 address code_base() const { return constMethod()->code_base(); } |
505 bool contains(address bcp) const { return constMethod()->contains(bcp); } | |
506 | |
507 // prints byte codes | |
508 void print_codes() const { print_codes_on(tty); } | |
509 void print_codes_on(outputStream* st) const PRODUCT_RETURN; | |
510 void print_codes_on(int from, int to, outputStream* st) const PRODUCT_RETURN; | |
511 | |
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512 // method parameters |
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513 bool has_method_parameters() const |
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514 { return constMethod()->has_method_parameters(); } |
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515 int method_parameters_length() const |
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516 { return constMethod()->method_parameters_length(); } |
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517 MethodParametersElement* method_parameters_start() const |
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518 { return constMethod()->method_parameters_start(); } |
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519 |
0 | 520 // checked exceptions |
521 int checked_exceptions_length() const | |
522 { return constMethod()->checked_exceptions_length(); } | |
523 CheckedExceptionElement* checked_exceptions_start() const | |
524 { return constMethod()->checked_exceptions_start(); } | |
525 | |
526 // localvariable table | |
527 bool has_localvariable_table() const | |
528 { return constMethod()->has_localvariable_table(); } | |
529 int localvariable_table_length() const | |
530 { return constMethod()->localvariable_table_length(); } | |
531 LocalVariableTableElement* localvariable_table_start() const | |
532 { return constMethod()->localvariable_table_start(); } | |
533 | |
534 bool has_linenumber_table() const | |
535 { return constMethod()->has_linenumber_table(); } | |
536 u_char* compressed_linenumber_table() const | |
537 { return constMethod()->compressed_linenumber_table(); } | |
538 | |
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539 // method holder (the Klass* holding this method) |
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540 InstanceKlass* method_holder() const { return constants()->pool_holder(); } |
0 | 541 |
542 void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments) | |
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543 Symbol* klass_name() const; // returns the name of the method holder |
0 | 544 BasicType result_type() const; // type of the method result |
545 int result_type_index() const; // type index of the method result | |
546 bool is_returning_oop() const { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); } | |
547 bool is_returning_fp() const { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); } | |
548 | |
549 // Checked exceptions thrown by this method (resolved to mirrors) | |
550 objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); } | |
551 | |
552 // Access flags | |
553 bool is_public() const { return access_flags().is_public(); } | |
554 bool is_private() const { return access_flags().is_private(); } | |
555 bool is_protected() const { return access_flags().is_protected(); } | |
556 bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); } | |
557 bool is_static() const { return access_flags().is_static(); } | |
558 bool is_final() const { return access_flags().is_final(); } | |
559 bool is_synchronized() const { return access_flags().is_synchronized();} | |
560 bool is_native() const { return access_flags().is_native(); } | |
561 bool is_abstract() const { return access_flags().is_abstract(); } | |
562 bool is_strict() const { return access_flags().is_strict(); } | |
563 bool is_synthetic() const { return access_flags().is_synthetic(); } | |
564 | |
565 // returns true if contains only return operation | |
566 bool is_empty_method() const; | |
567 | |
568 // returns true if this is a vanilla constructor | |
569 bool is_vanilla_constructor() const; | |
570 | |
571 // checks method and its method holder | |
572 bool is_final_method() const; | |
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573 bool is_final_method(AccessFlags class_access_flags) const; |
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574 bool is_default_method() const; |
0 | 575 |
576 // true if method needs no dynamic dispatch (final and/or no vtable entry) | |
577 bool can_be_statically_bound() const; | |
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578 bool can_be_statically_bound(AccessFlags class_access_flags) const; |
0 | 579 |
580 // returns true if the method has any backward branches. | |
581 bool has_loops() { | |
582 return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag(); | |
583 }; | |
584 | |
585 bool compute_has_loops_flag(); | |
586 | |
587 bool has_jsrs() { | |
588 return access_flags().has_jsrs(); | |
589 }; | |
590 void set_has_jsrs() { | |
591 _access_flags.set_has_jsrs(); | |
592 } | |
593 | |
594 // returns true if the method has any monitors. | |
595 bool has_monitors() const { return is_synchronized() || access_flags().has_monitor_bytecodes(); } | |
596 bool has_monitor_bytecodes() const { return access_flags().has_monitor_bytecodes(); } | |
597 | |
598 void set_has_monitor_bytecodes() { _access_flags.set_has_monitor_bytecodes(); } | |
599 | |
600 // monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes | |
601 // propererly nest in the method. It might return false, even though they actually nest properly, since the info. | |
602 // has not been computed yet. | |
603 bool guaranteed_monitor_matching() const { return access_flags().is_monitor_matching(); } | |
604 void set_guaranteed_monitor_matching() { _access_flags.set_monitor_matching(); } | |
605 | |
606 // returns true if the method is an accessor function (setter/getter). | |
607 bool is_accessor() const; | |
608 | |
609 // returns true if the method is an initializer (<init> or <clinit>). | |
610 bool is_initializer() const; | |
611 | |
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612 // returns true if the method is static OR if the classfile version < 51 |
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613 bool has_valid_initializer_flags() const; |
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614 |
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615 // returns true if the method name is <clinit> and the method has |
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616 // valid static initializer flags. |
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617 bool is_static_initializer() const; |
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618 |
0 | 619 // compiled code support |
620 // NOTE: code() is inherently racy as deopt can be clearing code | |
621 // simultaneously. Use with caution. | |
622 bool has_compiled_code() const { return code() != NULL; } | |
623 | |
624 // sizing | |
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625 static int header_size() { return sizeof(Method)/HeapWordSize; } |
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626 static int size(bool is_native); |
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627 int size() const { return method_size(); } |
7956 | 628 #if INCLUDE_SERVICES |
629 void collect_statistics(KlassSizeStats *sz) const; | |
630 #endif | |
0 | 631 |
632 // interpreter support | |
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633 static ByteSize const_offset() { return byte_offset_of(Method, _constMethod ); } |
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634 static ByteSize access_flags_offset() { return byte_offset_of(Method, _access_flags ); } |
0 | 635 #ifdef CC_INTERP |
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636 static ByteSize result_index_offset() { return byte_offset_of(Method, _result_index ); } |
0 | 637 #endif /* CC_INTERP */ |
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638 static ByteSize from_compiled_offset() { return byte_offset_of(Method, _from_compiled_entry); } |
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639 static ByteSize code_offset() { return byte_offset_of(Method, _code); } |
0 | 640 static ByteSize method_data_offset() { |
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641 return byte_offset_of(Method, _method_data); |
0 | 642 } |
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643 static ByteSize method_counters_offset() { |
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644 return byte_offset_of(Method, _method_counters); |
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645 } |
0 | 646 #ifndef PRODUCT |
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647 static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(Method, _compiled_invocation_count); } |
0 | 648 #endif // not PRODUCT |
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649 static ByteSize native_function_offset() { return in_ByteSize(sizeof(Method)); } |
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650 static ByteSize from_interpreted_offset() { return byte_offset_of(Method, _from_interpreted_entry ); } |
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651 static ByteSize interpreter_entry_offset() { return byte_offset_of(Method, _i2i_entry ); } |
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652 static ByteSize signature_handler_offset() { return in_ByteSize(sizeof(Method) + wordSize); } |
0 | 653 |
654 // for code generation | |
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655 static int method_data_offset_in_bytes() { return offset_of(Method, _method_data); } |
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656 static int intrinsic_id_offset_in_bytes() { return offset_of(Method, _intrinsic_id); } |
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657 static int intrinsic_id_size_in_bytes() { return sizeof(u1); } |
0 | 658 |
659 // Static methods that are used to implement member methods where an exposed this pointer | |
660 // is needed due to possible GCs | |
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661 static objArrayHandle resolved_checked_exceptions_impl(Method* this_oop, TRAPS); |
0 | 662 |
663 // Returns the byte code index from the byte code pointer | |
664 int bci_from(address bcp) const; | |
665 address bcp_from(int bci) const; | |
666 int validate_bci_from_bcx(intptr_t bcx) const; | |
667 | |
668 // Returns the line number for a bci if debugging information for the method is prowided, | |
669 // -1 is returned otherwise. | |
670 int line_number_from_bci(int bci) const; | |
671 | |
672 // Reflection support | |
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673 bool is_overridden_in(Klass* k) const; |
0 | 674 |
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675 // Stack walking support |
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676 bool is_ignored_by_security_stack_walk() const; |
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677 |
710 | 678 // JSR 292 support |
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679 bool is_method_handle_intrinsic() const; // MethodHandles::is_signature_polymorphic_intrinsic(intrinsic_id) |
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680 bool is_compiled_lambda_form() const; // intrinsic_id() == vmIntrinsics::_compiledLambdaForm |
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681 bool has_member_arg() const; // intrinsic_id() == vmIntrinsics::_linkToSpecial, etc. |
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682 static methodHandle make_method_handle_intrinsic(vmIntrinsics::ID iid, // _invokeBasic, _linkToVirtual |
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683 Symbol* signature, //anything at all |
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684 TRAPS); |
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685 static Klass* check_non_bcp_klass(Klass* klass); |
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686 |
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687 // How many extra stack entries for invokedynamic when it's enabled |
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688 static const int extra_stack_entries_for_jsr292 = 1; |
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689 |
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690 // this operates only on invoke methods: |
710 | 691 // presize interpreter frames for extra interpreter stack entries, if needed |
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692 // Account for the extra appendix argument for invokehandle/invokedynamic |
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693 static int extra_stack_entries() { return EnableInvokeDynamic ? extra_stack_entries_for_jsr292 : 0; } |
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694 static int extra_stack_words(); // = extra_stack_entries() * Interpreter::stackElementSize |
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695 |
0 | 696 // RedefineClasses() support: |
697 bool is_old() const { return access_flags().is_old(); } | |
698 void set_is_old() { _access_flags.set_is_old(); } | |
699 bool is_obsolete() const { return access_flags().is_obsolete(); } | |
700 void set_is_obsolete() { _access_flags.set_is_obsolete(); } | |
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701 bool on_stack() const { return access_flags().on_stack(); } |
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702 void set_on_stack(const bool value); |
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703 |
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704 // see the definition in Method*.cpp for the gory details |
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705 bool should_not_be_cached() const; |
0 | 706 |
707 // JVMTI Native method prefixing support: | |
708 bool is_prefixed_native() const { return access_flags().is_prefixed_native(); } | |
709 void set_is_prefixed_native() { _access_flags.set_is_prefixed_native(); } | |
710 | |
711 // Rewriting support | |
712 static methodHandle clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length, | |
713 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS); | |
714 | |
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715 // jmethodID handling |
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716 // Because the useful life-span of a jmethodID cannot be determined, |
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717 // once created they are never reclaimed. The methods to which they refer, |
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718 // however, can be GC'ed away if the class is unloaded or if the method is |
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|
719 // made obsolete or deleted -- in these cases, the jmethodID |
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|
720 // refers to NULL (as is the case for any weak reference). |
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|
721 static jmethodID make_jmethod_id(ClassLoaderData* loader_data, Method* mh); |
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|
722 static void destroy_jmethod_id(ClassLoaderData* loader_data, jmethodID mid); |
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|
723 |
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|
724 // Use resolve_jmethod_id() in situations where the caller is expected |
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725 // to provide a valid jmethodID; the only sanity checks are in asserts; |
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|
726 // result guaranteed not to be NULL. |
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diff
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|
727 inline static Method* resolve_jmethod_id(jmethodID mid) { |
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728 assert(mid != NULL, "JNI method id should not be null"); |
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729 return *((Method**)mid); |
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730 } |
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|
731 |
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732 // Use checked_resolve_jmethod_id() in situations where the caller |
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|
733 // should provide a valid jmethodID, but might not. NULL is returned |
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734 // when the jmethodID does not refer to a valid method. |
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735 static Method* checked_resolve_jmethod_id(jmethodID mid); |
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736 |
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737 static void change_method_associated_with_jmethod_id(jmethodID old_jmid_ptr, Method* new_method); |
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738 static bool is_method_id(jmethodID mid); |
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739 |
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740 // Clear methods |
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|
741 static void clear_jmethod_ids(ClassLoaderData* loader_data); |
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742 static void print_jmethod_ids(ClassLoaderData* loader_data, outputStream* out) PRODUCT_RETURN; |
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743 |
0 | 744 // Get this method's jmethodID -- allocate if it doesn't exist |
745 jmethodID jmethod_id() { methodHandle this_h(this); | |
6940
18fb7da42534
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746 return InstanceKlass::get_jmethod_id(method_holder(), this_h); } |
0 | 747 |
748 // Lookup the jmethodID for this method. Return NULL if not found. | |
749 // NOTE that this function can be called from a signal handler | |
750 // (see AsyncGetCallTrace support for Forte Analyzer) and this | |
751 // needs to be async-safe. No allocation should be done and | |
752 // so handles are not used to avoid deadlock. | |
6940
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753 jmethodID find_jmethod_id_or_null() { return method_holder()->jmethod_id_or_null(this); } |
0 | 754 |
755 // Support for inlining of intrinsic methods | |
856
75596850f863
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756 vmIntrinsics::ID intrinsic_id() const { return (vmIntrinsics::ID) _intrinsic_id; } |
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757 void set_intrinsic_id(vmIntrinsics::ID id) { _intrinsic_id = (u1) id; } |
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758 |
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759 // Helper routines for intrinsic_id() and vmIntrinsics::method(). |
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760 void init_intrinsic_id(); // updates from _none if a match |
6725
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761 static vmSymbols::SID klass_id_for_intrinsics(Klass* holder); |
0 | 762 |
14727
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763 bool jfr_towrite() { |
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764 return (_flags & _jfr_towrite) != 0; |
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765 } |
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766 void set_jfr_towrite(bool x) { |
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767 _flags = x ? (_flags | _jfr_towrite) : (_flags & ~_jfr_towrite); |
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768 } |
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769 |
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770 bool caller_sensitive() { |
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771 return (_flags & _caller_sensitive) != 0; |
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772 } |
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773 void set_caller_sensitive(bool x) { |
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774 _flags = x ? (_flags | _caller_sensitive) : (_flags & ~_caller_sensitive); |
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Backport of 8504393de66b from jdk9
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|
775 } |
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776 |
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777 bool force_inline() { |
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778 return (_flags & _force_inline) != 0; |
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779 } |
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780 void set_force_inline(bool x) { |
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781 _flags = x ? (_flags | _force_inline) : (_flags & ~_force_inline); |
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782 } |
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|
783 |
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|
784 bool dont_inline() { |
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785 return (_flags & _dont_inline) != 0; |
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786 } |
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|
787 void set_dont_inline(bool x) { |
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Backport of 8504393de66b from jdk9
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788 _flags = x ? (_flags | _dont_inline) : (_flags & ~_dont_inline); |
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789 } |
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Backport of 8504393de66b from jdk9
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|
790 |
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|
791 bool is_hidden() { |
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792 return (_flags & _hidden) != 0; |
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793 } |
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794 void set_hidden(bool x) { |
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795 _flags = x ? (_flags | _hidden) : (_flags & ~_hidden); |
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|
796 } |
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797 |
6934 | 798 ConstMethod::MethodType method_type() const { |
799 return _constMethod->method_type(); | |
800 } | |
801 bool is_overpass() const { return method_type() == ConstMethod::OVERPASS; } | |
6222
6d8f36bcef55
6711908: JVM needs direct access to some annotations
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|
802 |
0 | 803 // On-stack replacement support |
1783 | 804 bool has_osr_nmethod(int level, bool match_level) { |
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805 return method_holder()->lookup_osr_nmethod(this, InvocationEntryBci, level, match_level) != NULL; |
1783 | 806 } |
807 | |
808 nmethod* lookup_osr_nmethod_for(int bci, int level, bool match_level) { | |
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|
809 return method_holder()->lookup_osr_nmethod(this, bci, level, match_level); |
1783 | 810 } |
0 | 811 |
812 // Inline cache support | |
813 void cleanup_inline_caches(); | |
814 | |
815 // Find if klass for method is loaded | |
816 bool is_klass_loaded_by_klass_index(int klass_index) const; | |
817 bool is_klass_loaded(int refinfo_index, bool must_be_resolved = false) const; | |
818 | |
819 // Indicates whether compilation failed earlier for this method, or | |
820 // whether it is not compilable for another reason like having a | |
821 // breakpoint set in it. | |
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|
822 bool is_not_compilable(int comp_level = CompLevel_any) const; |
7998 | 823 void set_not_compilable(int comp_level = CompLevel_all, bool report = true, const char* reason = NULL); |
1783 | 824 void set_not_compilable_quietly(int comp_level = CompLevel_all) { |
1208
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diff
changeset
|
825 set_not_compilable(comp_level, false); |
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|
826 } |
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|
827 bool is_not_osr_compilable(int comp_level = CompLevel_any) const; |
7998 | 828 void set_not_osr_compilable(int comp_level = CompLevel_all, bool report = true, const char* reason = NULL); |
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|
829 void set_not_osr_compilable_quietly(int comp_level = CompLevel_all) { |
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830 set_not_osr_compilable(comp_level, false); |
1783 | 831 } |
12170
8947af8a9cec
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832 bool is_always_compilable() const; |
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833 |
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834 private: |
7998 | 835 void print_made_not_compilable(int comp_level, bool is_osr, bool report, const char* reason); |
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836 |
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837 public: |
10105
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838 MethodCounters* get_method_counters(TRAPS) { |
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|
839 if (_method_counters == NULL) { |
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840 build_method_counters(this, CHECK_AND_CLEAR_NULL); |
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841 } |
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|
842 return _method_counters; |
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843 } |
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844 |
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845 bool is_not_c1_compilable() const { return access_flags().is_not_c1_compilable(); } |
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846 void set_not_c1_compilable() { _access_flags.set_not_c1_compilable(); } |
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847 void clear_not_c1_compilable() { _access_flags.clear_not_c1_compilable(); } |
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848 bool is_not_c2_compilable() const { return access_flags().is_not_c2_compilable(); } |
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849 void set_not_c2_compilable() { _access_flags.set_not_c2_compilable(); } |
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850 void clear_not_c2_compilable() { _access_flags.clear_not_c2_compilable(); } |
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851 |
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852 bool is_not_c1_osr_compilable() const { return is_not_c1_compilable(); } // don't waste an accessFlags bit |
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853 void set_not_c1_osr_compilable() { set_not_c1_compilable(); } // don't waste an accessFlags bit |
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854 void clear_not_c1_osr_compilable() { clear_not_c1_compilable(); } // don't waste an accessFlags bit |
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855 bool is_not_c2_osr_compilable() const { return access_flags().is_not_c2_osr_compilable(); } |
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856 void set_not_c2_osr_compilable() { _access_flags.set_not_c2_osr_compilable(); } |
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857 void clear_not_c2_osr_compilable() { _access_flags.clear_not_c2_osr_compilable(); } |
0 | 858 |
859 // Background compilation support | |
1783 | 860 bool queued_for_compilation() const { return access_flags().queued_for_compilation(); } |
861 void set_queued_for_compilation() { _access_flags.set_queued_for_compilation(); } | |
862 void clear_queued_for_compilation() { _access_flags.clear_queued_for_compilation(); } | |
0 | 863 |
864 // Resolve all classes in signature, return 'true' if successful | |
865 static bool load_signature_classes(methodHandle m, TRAPS); | |
866 | |
867 // Return if true if not all classes references in signature, including return type, has been loaded | |
868 static bool has_unloaded_classes_in_signature(methodHandle m, TRAPS); | |
869 | |
870 // Printing | |
8021
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871 void print_short_name(outputStream* st = tty); // prints as klassname::methodname; Exposed so field engineers can debug VM |
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872 #if INCLUDE_JVMTI |
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873 void print_name(outputStream* st = tty); // prints as "virtual void foo(int)"; exposed for TraceRedefineClasses |
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874 #else |
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875 void print_name(outputStream* st = tty) PRODUCT_RETURN; // prints as "virtual void foo(int)" |
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876 #endif |
0 | 877 |
878 // Helper routine used for method sorting | |
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879 static void sort_methods(Array<Method*>* methods, bool idempotent = false, bool set_idnums = true); |
0 | 880 |
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881 // Deallocation function for redefine classes or if an error occurs |
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882 void deallocate_contents(ClassLoaderData* loader_data); |
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883 |
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884 // Printing |
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885 #ifndef PRODUCT |
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886 void print_on(outputStream* st) const; |
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887 #endif |
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888 void print_value_on(outputStream* st) const; |
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889 |
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890 const char* internal_name() const { return "{method}"; } |
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891 |
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892 // Check for valid method pointer |
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893 bool is_valid_method() const; |
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894 |
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895 // Verify |
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896 void verify() { verify_on(tty); } |
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897 void verify_on(outputStream* st); |
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898 |
0 | 899 private: |
900 | |
901 // Inlined elements | |
902 address* native_function_addr() const { assert(is_native(), "must be native"); return (address*) (this+1); } | |
903 address* signature_handler_addr() const { return native_function_addr() + 1; } | |
904 }; | |
905 | |
906 | |
907 // Utility class for compressing line number tables | |
908 | |
909 class CompressedLineNumberWriteStream: public CompressedWriteStream { | |
910 private: | |
911 int _bci; | |
912 int _line; | |
913 public: | |
914 // Constructor | |
915 CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {} | |
916 CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {} | |
917 | |
918 // Write (bci, line number) pair to stream | |
919 void write_pair_regular(int bci_delta, int line_delta); | |
920 | |
921 inline void write_pair_inline(int bci, int line) { | |
922 int bci_delta = bci - _bci; | |
923 int line_delta = line - _line; | |
924 _bci = bci; | |
925 _line = line; | |
926 // Skip (0,0) deltas - they do not add information and conflict with terminator. | |
927 if (bci_delta == 0 && line_delta == 0) return; | |
928 // Check if bci is 5-bit and line number 3-bit unsigned. | |
929 if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) { | |
930 // Compress into single byte. | |
931 jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta; | |
932 // Check that value doesn't match escape character. | |
933 if (value != 0xFF) { | |
934 write_byte(value); | |
935 return; | |
936 } | |
937 } | |
938 write_pair_regular(bci_delta, line_delta); | |
939 } | |
940 | |
941 // Windows AMD64 + Apr 2005 PSDK with /O2 generates bad code for write_pair. | |
942 // Disabling optimization doesn't work for methods in header files | |
943 // so we force it to call through the non-optimized version in the .cpp. | |
944 // It's gross, but it's the only way we can ensure that all callers are | |
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945 // fixed. _MSC_VER is defined by the windows compiler |
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946 #if defined(_M_AMD64) && _MSC_VER >= 1400 |
0 | 947 void write_pair(int bci, int line); |
948 #else | |
949 void write_pair(int bci, int line) { write_pair_inline(bci, line); } | |
950 #endif | |
951 | |
952 // Write end-of-stream marker | |
953 void write_terminator() { write_byte(0); } | |
954 }; | |
955 | |
956 | |
957 // Utility class for decompressing line number tables | |
958 | |
959 class CompressedLineNumberReadStream: public CompressedReadStream { | |
960 private: | |
961 int _bci; | |
962 int _line; | |
963 public: | |
964 // Constructor | |
965 CompressedLineNumberReadStream(u_char* buffer); | |
966 // Read (bci, line number) pair from stream. Returns false at end-of-stream. | |
967 bool read_pair(); | |
968 // Accessing bci and line number (after calling read_pair) | |
969 int bci() const { return _bci; } | |
970 int line() const { return _line; } | |
971 }; | |
972 | |
973 | |
974 /// Fast Breakpoints. | |
975 | |
976 // If this structure gets more complicated (because bpts get numerous), | |
977 // move it into its own header. | |
978 | |
979 // There is presently no provision for concurrent access | |
980 // to breakpoint lists, which is only OK for JVMTI because | |
981 // breakpoints are written only at safepoints, and are read | |
982 // concurrently only outside of safepoints. | |
983 | |
6197 | 984 class BreakpointInfo : public CHeapObj<mtClass> { |
0 | 985 friend class VMStructs; |
986 private: | |
987 Bytecodes::Code _orig_bytecode; | |
988 int _bci; | |
989 u2 _name_index; // of method | |
990 u2 _signature_index; // of method | |
991 BreakpointInfo* _next; // simple storage allocation | |
992 | |
993 public: | |
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994 BreakpointInfo(Method* m, int bci); |
0 | 995 |
996 // accessors | |
997 Bytecodes::Code orig_bytecode() { return _orig_bytecode; } | |
998 void set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; } | |
999 int bci() { return _bci; } | |
1000 | |
1001 BreakpointInfo* next() const { return _next; } | |
1002 void set_next(BreakpointInfo* n) { _next = n; } | |
1003 | |
1004 // helps for searchers | |
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1005 bool match(const Method* m, int bci) { |
0 | 1006 return bci == _bci && match(m); |
1007 } | |
1008 | |
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1009 bool match(const Method* m) { |
0 | 1010 return _name_index == m->name_index() && |
1011 _signature_index == m->signature_index(); | |
1012 } | |
1013 | |
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1014 void set(Method* method); |
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1015 void clear(Method* method); |
0 | 1016 }; |
1972 | 1017 |
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1018 // Utility class for access exception handlers |
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1019 class ExceptionTable : public StackObj { |
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1020 private: |
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1021 ExceptionTableElement* _table; |
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1022 u2 _length; |
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1023 |
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1024 public: |
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1025 ExceptionTable(const Method* m) { |
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1026 if (m->has_exception_handler()) { |
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1027 _table = m->exception_table_start(); |
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1028 _length = m->exception_table_length(); |
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1029 } else { |
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1030 _table = NULL; |
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1031 _length = 0; |
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1032 } |
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1033 } |
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1034 |
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1035 int length() const { |
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1036 return _length; |
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1037 } |
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1038 |
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1039 u2 start_pc(int idx) const { |
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1040 assert(idx < _length, "out of bounds"); |
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1041 return _table[idx].start_pc; |
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1042 } |
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1043 |
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1044 void set_start_pc(int idx, u2 value) { |
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1045 assert(idx < _length, "out of bounds"); |
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1046 _table[idx].start_pc = value; |
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1047 } |
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1048 |
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1049 u2 end_pc(int idx) const { |
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1050 assert(idx < _length, "out of bounds"); |
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1051 return _table[idx].end_pc; |
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1052 } |
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1053 |
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1054 void set_end_pc(int idx, u2 value) { |
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1055 assert(idx < _length, "out of bounds"); |
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1056 _table[idx].end_pc = value; |
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1057 } |
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1058 |
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1059 u2 handler_pc(int idx) const { |
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1060 assert(idx < _length, "out of bounds"); |
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1061 return _table[idx].handler_pc; |
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1062 } |
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1063 |
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1064 void set_handler_pc(int idx, u2 value) { |
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1065 assert(idx < _length, "out of bounds"); |
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1066 _table[idx].handler_pc = value; |
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1067 } |
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1068 |
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1069 u2 catch_type_index(int idx) const { |
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1070 assert(idx < _length, "out of bounds"); |
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1071 return _table[idx].catch_type_index; |
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1072 } |
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1073 |
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1074 void set_catch_type_index(int idx, u2 value) { |
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1075 assert(idx < _length, "out of bounds"); |
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1076 _table[idx].catch_type_index = value; |
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1077 } |
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1078 }; |
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1079 |
1972 | 1080 #endif // SHARE_VM_OOPS_METHODOOP_HPP |