Mercurial > hg > truffle
annotate src/share/vm/oops/method.hpp @ 8021:8d9fc28831cc
7182152: Instrumentation hot swap test incorrect monitor count
Summary: Add/refine new tracing support using -XX:TraceRedefineClasses=16384.
Reviewed-by: coleenp, acorn, sspitsyn
| author | dcubed |
|---|---|
| date | Wed, 06 Feb 2013 14:31:37 -0800 |
| parents | 1eae78177059 |
| children | 461a3adac4d1 |
| rev | line source |
|---|---|
| 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" |
| 1972 | 34 #include "oops/instanceKlass.hpp" |
| 35 #include "oops/oop.hpp" | |
| 36 #include "oops/typeArrayOop.hpp" | |
| 37 #include "utilities/accessFlags.hpp" | |
| 38 #include "utilities/growableArray.hpp" | |
| 39 | |
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40 // A Method* represents a Java method. |
| 0 | 41 // |
| 42 // Memory layout (each line represents a word). Note that most applications load thousands of methods, | |
| 43 // so keeping the size of this structure small has a big impact on footprint. | |
| 44 // | |
| 45 // We put all oops and method_size first for better gc cache locality. | |
| 46 // | |
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47 // The actual bytecodes are inlined after the end of the Method struct. |
| 0 | 48 // |
| 49 // There are bits in the access_flags telling whether inlined tables are present. | |
| 50 // Note that accessing the line number and local variable tables is not performance critical at all. | |
| 51 // Accessing the checked exceptions table is used by reflection, so we put that last to make access | |
| 52 // to it fast. | |
| 53 // | |
| 54 // The line number table is compressed and inlined following the byte codes. It is found as the first | |
| 55 // byte following the byte codes. The checked exceptions table and the local variable table are inlined | |
| 56 // after the line number table, and indexed from the end of the method. We do not compress the checked | |
| 57 // exceptions table since the average length is less than 2, and do not bother to compress the local | |
| 58 // variable table either since it is mostly absent. | |
| 59 // | |
| 60 // Note that native_function and signature_handler has to be at fixed offsets (required by the interpreter) | |
| 61 // | |
| 62 // |------------------------------------------------------| | |
| 63 // | header | | |
| 64 // | klass | | |
| 65 // |------------------------------------------------------| | |
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66 // | ConstMethod* (oop) | |
| 0 | 67 // |------------------------------------------------------| |
| 68 // | methodData (oop) | | |
| 69 // | interp_invocation_count | | |
| 70 // |------------------------------------------------------| | |
| 71 // | access_flags | | |
| 72 // | vtable_index | | |
| 73 // |------------------------------------------------------| | |
| 74 // | result_index (C++ interpreter only) | | |
| 75 // |------------------------------------------------------| | |
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76 // | method_size | intrinsic_id| flags | |
| 0 | 77 // |------------------------------------------------------| |
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78 // | throwout_count | num_breakpoints | |
| 0 | 79 // |------------------------------------------------------| |
| 80 // | invocation_counter | | |
| 81 // | backedge_counter | | |
| 82 // |------------------------------------------------------| | |
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83 // | prev_time (tiered only, 64 bit wide) | |
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84 // | | |
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85 // |------------------------------------------------------| |
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86 // | rate (tiered) | |
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87 // |------------------------------------------------------| |
| 0 | 88 // | code (pointer) | |
| 89 // | i2i (pointer) | | |
| 90 // | adapter (pointer) | | |
| 91 // | from_compiled_entry (pointer) | | |
| 92 // | from_interpreted_entry (pointer) | | |
| 93 // |------------------------------------------------------| | |
| 94 // | native_function (present only if native) | | |
| 95 // | signature_handler (present only if native) | | |
| 96 // |------------------------------------------------------| | |
| 97 | |
| 98 | |
| 99 class CheckedExceptionElement; | |
| 100 class LocalVariableTableElement; | |
| 101 class AdapterHandlerEntry; | |
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102 class MethodData; |
| 6934 | 103 class ConstMethod; |
| 7956 | 104 class KlassSizeStats; |
| 0 | 105 |
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106 class Method : public Metadata { |
| 0 | 107 friend class VMStructs; |
| 108 private: | |
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109 ConstMethod* _constMethod; // Method read-only data. |
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110 MethodData* _method_data; |
| 1783 | 111 int _interpreter_invocation_count; // Count of times invoked (reused as prev_event_count in tiered) |
| 0 | 112 AccessFlags _access_flags; // Access flags |
| 113 int _vtable_index; // vtable index of this method (see VtableIndexFlag) | |
| 114 // note: can have vtables with >2**16 elements (because of inheritance) | |
| 115 #ifdef CC_INTERP | |
| 116 int _result_index; // C++ interpreter needs for converting results to/from stack | |
| 117 #endif | |
| 118 u2 _method_size; // size of this object | |
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119 u1 _intrinsic_id; // vmSymbols::intrinsic_id (0 == _none) |
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120 u1 _jfr_towrite : 1, // Flags |
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121 _force_inline : 1, |
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122 _hidden : 1, |
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123 _dont_inline : 1, |
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124 : 4; |
| 0 | 125 u2 _interpreter_throwout_count; // Count of times method was exited via exception while interpreting |
| 126 u2 _number_of_breakpoints; // fullspeed debugging support | |
| 127 InvocationCounter _invocation_counter; // Incremented before each activation of the method - used to trigger frequency-based optimizations | |
| 128 InvocationCounter _backedge_counter; // Incremented before each backedge taken - used to trigger frequencey-based optimizations | |
| 1783 | 129 |
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130 #ifdef TIERED |
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131 float _rate; // Events (invocation and backedge counter increments) per millisecond |
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132 jlong _prev_time; // Previous time the rate was acquired |
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133 #endif |
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134 |
| 0 | 135 #ifndef PRODUCT |
| 136 int _compiled_invocation_count; // Number of nmethod invocations so far (for perf. debugging) | |
| 137 #endif | |
| 138 // Entry point for calling both from and to the interpreter. | |
| 139 address _i2i_entry; // All-args-on-stack calling convention | |
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140 // Adapter blob (i2c/c2i) for this Method*. Set once when method is linked. |
| 0 | 141 AdapterHandlerEntry* _adapter; |
| 142 // Entry point for calling from compiled code, to compiled code if it exists | |
| 143 // or else the interpreter. | |
| 144 volatile address _from_compiled_entry; // Cache of: _code ? _code->entry_point() : _adapter->c2i_entry() | |
| 145 // The entry point for calling both from and to compiled code is | |
| 146 // "_code->entry_point()". Because of tiered compilation and de-opt, this | |
| 147 // field can come and go. It can transition from NULL to not-null at any | |
| 148 // time (whenever a compile completes). It can transition from not-null to | |
| 149 // NULL only at safepoints (because of a de-opt). | |
| 150 nmethod* volatile _code; // Points to the corresponding piece of native code | |
| 151 volatile address _from_interpreted_entry; // Cache of _code ? _adapter->i2c_entry() : _i2i_entry | |
| 152 | |
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153 // Constructor |
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154 Method(ConstMethod* xconst, AccessFlags access_flags, int size); |
| 0 | 155 public: |
| 6934 | 156 |
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157 static Method* allocate(ClassLoaderData* loader_data, |
| 6934 | 158 int byte_code_size, |
| 159 AccessFlags access_flags, | |
| 160 int compressed_line_number_size, | |
| 161 int localvariable_table_length, | |
| 162 int exception_table_length, | |
| 163 int checked_exceptions_length, | |
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164 int method_parameters_length, |
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165 u2 generic_signature_index, |
| 6934 | 166 ConstMethod::MethodType method_type, |
| 167 TRAPS); | |
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168 |
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169 // CDS and vtbl checking can create an empty Method to get vtbl pointer. |
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170 Method(){} |
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171 |
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172 // The Method vtable is restored by this call when the Method is in the |
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173 // shared archive. See patch_klass_vtables() in metaspaceShared.cpp for |
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174 // all the gory details. SA, dtrace and pstack helpers distinguish metadata |
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175 // by their vtable. |
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176 void restore_vtable() { guarantee(is_method(), "vtable restored by this call"); } |
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177 bool is_method() const volatile { return true; } |
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178 |
| 0 | 179 // accessors for instance variables |
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180 |
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181 ConstMethod* constMethod() const { return _constMethod; } |
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182 void set_constMethod(ConstMethod* xconst) { _constMethod = xconst; } |
| 0 | 183 |
| 184 | |
| 185 static address make_adapters(methodHandle mh, TRAPS); | |
| 186 volatile address from_compiled_entry() const { return (address)OrderAccess::load_ptr_acquire(&_from_compiled_entry); } | |
| 187 volatile address from_interpreted_entry() const{ return (address)OrderAccess::load_ptr_acquire(&_from_interpreted_entry); } | |
| 188 | |
| 189 // access flag | |
| 190 AccessFlags access_flags() const { return _access_flags; } | |
| 191 void set_access_flags(AccessFlags flags) { _access_flags = flags; } | |
| 192 | |
| 193 // name | |
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194 Symbol* name() const { return constants()->symbol_at(name_index()); } |
| 0 | 195 int name_index() const { return constMethod()->name_index(); } |
| 196 void set_name_index(int index) { constMethod()->set_name_index(index); } | |
| 197 | |
| 198 // signature | |
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199 Symbol* signature() const { return constants()->symbol_at(signature_index()); } |
| 0 | 200 int signature_index() const { return constMethod()->signature_index(); } |
| 201 void set_signature_index(int index) { constMethod()->set_signature_index(index); } | |
| 202 | |
| 203 // generics support | |
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204 Symbol* generic_signature() const { int idx = generic_signature_index(); return ((idx != 0) ? constants()->symbol_at(idx) : (Symbol*)NULL); } |
| 0 | 205 int generic_signature_index() const { return constMethod()->generic_signature_index(); } |
| 206 void set_generic_signature_index(int index) { constMethod()->set_generic_signature_index(index); } | |
| 207 | |
| 208 // annotations support | |
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209 AnnotationArray* annotations() const { |
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210 InstanceKlass* ik = method_holder(); |
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211 if (ik->annotations() == NULL) { |
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212 return NULL; |
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213 } |
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214 return ik->annotations()->get_method_annotations_of(method_idnum()); |
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215 } |
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216 AnnotationArray* parameter_annotations() const { |
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217 InstanceKlass* ik = method_holder(); |
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218 if (ik->annotations() == NULL) { |
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219 return NULL; |
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220 } |
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221 return ik->annotations()->get_method_parameter_annotations_of(method_idnum()); |
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222 } |
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223 AnnotationArray* annotation_default() const { |
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224 InstanceKlass* ik = method_holder(); |
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225 if (ik->annotations() == NULL) { |
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226 return NULL; |
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227 } |
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228 return ik->annotations()->get_method_default_annotations_of(method_idnum()); |
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229 } |
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230 AnnotationArray* type_annotations() const { |
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231 InstanceKlass* ik = method_holder(); |
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232 Annotations* type_annos = ik->type_annotations(); |
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233 if (type_annos == NULL) |
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234 return NULL; |
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235 return type_annos->get_method_annotations_of(method_idnum()); |
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236 } |
| 0 | 237 |
| 238 #ifdef CC_INTERP | |
| 239 void set_result_index(BasicType type); | |
| 240 int result_index() { return _result_index; } | |
| 241 #endif | |
| 242 | |
| 243 // Helper routine: get klass name + "." + method name + signature as | |
| 244 // C string, for the purpose of providing more useful NoSuchMethodErrors | |
| 245 // and fatal error handling. The string is allocated in resource | |
| 246 // area if a buffer is not provided by the caller. | |
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247 char* name_and_sig_as_C_string() const; |
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248 char* name_and_sig_as_C_string(char* buf, int size) const; |
| 0 | 249 |
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250 // Static routine in the situations we don't have a Method* |
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251 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature); |
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252 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size); |
| 0 | 253 |
| 2142 | 254 Bytecodes::Code java_code_at(int bci) const { |
| 255 return Bytecodes::java_code_at(this, bcp_from(bci)); | |
| 256 } | |
| 257 Bytecodes::Code code_at(int bci) const { | |
| 258 return Bytecodes::code_at(this, bcp_from(bci)); | |
| 259 } | |
| 260 | |
| 0 | 261 // JVMTI breakpoints |
| 2142 | 262 Bytecodes::Code orig_bytecode_at(int bci) const; |
| 0 | 263 void set_orig_bytecode_at(int bci, Bytecodes::Code code); |
| 264 void set_breakpoint(int bci); | |
| 265 void clear_breakpoint(int bci); | |
| 266 void clear_all_breakpoints(); | |
| 267 // Tracking number of breakpoints, for fullspeed debugging. | |
| 268 // Only mutated by VM thread. | |
| 269 u2 number_of_breakpoints() const { return _number_of_breakpoints; } | |
| 270 void incr_number_of_breakpoints() { ++_number_of_breakpoints; } | |
| 271 void decr_number_of_breakpoints() { --_number_of_breakpoints; } | |
| 272 // Initialization only | |
| 273 void clear_number_of_breakpoints() { _number_of_breakpoints = 0; } | |
| 274 | |
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275 // index into InstanceKlass methods() array |
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276 // note: also used by jfr |
| 0 | 277 u2 method_idnum() const { return constMethod()->method_idnum(); } |
| 278 void set_method_idnum(u2 idnum) { constMethod()->set_method_idnum(idnum); } | |
| 279 | |
| 280 // code size | |
| 281 int code_size() const { return constMethod()->code_size(); } | |
| 282 | |
| 283 // method size | |
| 284 int method_size() const { return _method_size; } | |
| 285 void set_method_size(int size) { | |
| 286 assert(0 <= size && size < (1 << 16), "invalid method size"); | |
| 287 _method_size = size; | |
| 288 } | |
| 289 | |
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290 // constant pool for Klass* holding this method |
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291 ConstantPool* constants() const { return constMethod()->constants(); } |
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292 void set_constants(ConstantPool* c) { constMethod()->set_constants(c); } |
| 0 | 293 |
| 294 // max stack | |
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295 // return original max stack size for method verification |
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296 int verifier_max_stack() const { return constMethod()->max_stack(); } |
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297 int max_stack() const { return constMethod()->max_stack() + extra_stack_entries(); } |
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298 void set_max_stack(int size) { constMethod()->set_max_stack(size); } |
| 0 | 299 |
| 300 // max locals | |
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301 int max_locals() const { return constMethod()->max_locals(); } |
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302 void set_max_locals(int size) { constMethod()->set_max_locals(size); } |
| 1783 | 303 |
| 304 int highest_comp_level() const; | |
| 305 void set_highest_comp_level(int level); | |
| 306 int highest_osr_comp_level() const; | |
| 307 void set_highest_osr_comp_level(int level); | |
| 0 | 308 |
| 309 // Count of times method was exited via exception while interpreting | |
| 310 void interpreter_throwout_increment() { | |
| 311 if (_interpreter_throwout_count < 65534) { | |
| 312 _interpreter_throwout_count++; | |
| 313 } | |
| 314 } | |
| 315 | |
| 316 int interpreter_throwout_count() const { return _interpreter_throwout_count; } | |
| 317 void set_interpreter_throwout_count(int count) { _interpreter_throwout_count = count; } | |
| 318 | |
| 319 // size of parameters | |
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320 int size_of_parameters() const { return constMethod()->size_of_parameters(); } |
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321 void set_size_of_parameters(int size) { constMethod()->set_size_of_parameters(size); } |
| 0 | 322 |
| 323 bool has_stackmap_table() const { | |
| 324 return constMethod()->has_stackmap_table(); | |
| 325 } | |
| 326 | |
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327 Array<u1>* stackmap_data() const { |
| 0 | 328 return constMethod()->stackmap_data(); |
| 329 } | |
| 330 | |
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331 void set_stackmap_data(Array<u1>* sd) { |
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332 constMethod()->set_stackmap_data(sd); |
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333 } |
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334 |
| 0 | 335 // exception handler table |
| 336 bool has_exception_handler() const | |
| 337 { return constMethod()->has_exception_handler(); } | |
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338 int exception_table_length() const |
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339 { return constMethod()->exception_table_length(); } |
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340 ExceptionTableElement* exception_table_start() const |
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341 { return constMethod()->exception_table_start(); } |
| 0 | 342 |
| 343 // Finds the first entry point bci of an exception handler for an | |
| 344 // exception of klass ex_klass thrown at throw_bci. A value of NULL | |
| 345 // for ex_klass indicates that the exception klass is not known; in | |
| 346 // this case it matches any constraint class. Returns -1 if the | |
| 347 // exception cannot be handled in this method. The handler | |
| 348 // constraint classes are loaded if necessary. Note that this may | |
| 349 // throw an exception if loading of the constraint classes causes | |
| 350 // an IllegalAccessError (bugid 4307310) or an OutOfMemoryError. | |
| 351 // If an exception is thrown, returns the bci of the | |
| 352 // exception handler which caused the exception to be thrown, which | |
| 353 // is needed for proper retries. See, for example, | |
| 354 // InterpreterRuntime::exception_handler_for_exception. | |
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355 static int fast_exception_handler_bci_for(methodHandle mh, KlassHandle ex_klass, int throw_bci, TRAPS); |
| 0 | 356 |
| 357 // method data access | |
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358 MethodData* method_data() const { |
| 0 | 359 return _method_data; |
| 360 } | |
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361 void set_method_data(MethodData* data) { |
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362 _method_data = data; |
| 0 | 363 } |
| 364 | |
| 365 // invocation counter | |
| 1783 | 366 InvocationCounter* invocation_counter() { return &_invocation_counter; } |
| 367 InvocationCounter* backedge_counter() { return &_backedge_counter; } | |
| 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 { return _interpreter_invocation_count; } |
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373 void set_prev_event_count(int count) { _interpreter_invocation_count = count; } |
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374 jlong prev_time() const { return _prev_time; } |
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375 void set_prev_time(jlong time) { _prev_time = time; } |
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376 float rate() const { return _rate; } |
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377 void set_rate(float rate) { _rate = rate; } |
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378 #endif |
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379 |
| 1783 | 380 int invocation_count(); |
| 381 int backedge_count(); | |
| 382 | |
| 383 bool was_executed_more_than(int n); | |
| 384 bool was_never_executed() { return !was_executed_more_than(0); } | |
| 0 | 385 |
| 386 static void build_interpreter_method_data(methodHandle method, TRAPS); | |
| 387 | |
| 1783 | 388 int interpreter_invocation_count() { |
| 389 if (TieredCompilation) return invocation_count(); | |
| 390 else return _interpreter_invocation_count; | |
| 391 } | |
| 0 | 392 void set_interpreter_invocation_count(int count) { _interpreter_invocation_count = count; } |
| 1783 | 393 int increment_interpreter_invocation_count() { |
| 394 if (TieredCompilation) ShouldNotReachHere(); | |
| 395 return ++_interpreter_invocation_count; | |
| 396 } | |
| 0 | 397 |
| 398 #ifndef PRODUCT | |
| 1783 | 399 int compiled_invocation_count() const { return _compiled_invocation_count; } |
| 0 | 400 void set_compiled_invocation_count(int count) { _compiled_invocation_count = count; } |
| 401 #endif // not PRODUCT | |
| 402 | |
| 605 | 403 // Clear (non-shared space) pointers which could not be relevant |
| 0 | 404 // if this (shared) method were mapped into another JVM. |
| 405 void remove_unshareable_info(); | |
| 406 | |
| 407 // nmethod/verified compiler entry | |
| 408 address verified_code_entry(); | |
| 409 bool check_code() const; // Not inline to avoid circular ref | |
| 410 nmethod* volatile code() const { assert( check_code(), "" ); return (nmethod *)OrderAccess::load_ptr_acquire(&_code); } | |
| 411 void clear_code(); // Clear out any compiled code | |
| 1202 | 412 static void set_code(methodHandle mh, nmethod* code); |
| 0 | 413 void set_adapter_entry(AdapterHandlerEntry* adapter) { _adapter = adapter; } |
| 414 address get_i2c_entry(); | |
| 415 address get_c2i_entry(); | |
| 416 address get_c2i_unverified_entry(); | |
| 417 AdapterHandlerEntry* adapter() { return _adapter; } | |
| 418 // setup entry points | |
| 419 void link_method(methodHandle method, TRAPS); | |
| 420 // clear entry points. Used by sharing code | |
| 421 void unlink_method(); | |
| 422 | |
| 423 // vtable index | |
| 424 enum VtableIndexFlag { | |
| 425 // Valid vtable indexes are non-negative (>= 0). | |
| 426 // These few negative values are used as sentinels. | |
| 710 | 427 highest_unused_vtable_index_value = -5, |
| 0 | 428 invalid_vtable_index = -4, // distinct from any valid vtable index |
| 429 garbage_vtable_index = -3, // not yet linked; no vtable layout yet | |
| 430 nonvirtual_vtable_index = -2 // there is no need for vtable dispatch | |
| 431 // 6330203 Note: Do not use -1, which was overloaded with many meanings. | |
| 432 }; | |
| 433 DEBUG_ONLY(bool valid_vtable_index() const { return _vtable_index >= nonvirtual_vtable_index; }) | |
| 434 int vtable_index() const { assert(valid_vtable_index(), ""); | |
| 435 return _vtable_index; } | |
| 436 void set_vtable_index(int index) { _vtable_index = index; } | |
| 437 | |
| 438 // interpreter entry | |
| 439 address interpreter_entry() const { return _i2i_entry; } | |
| 440 // Only used when first initialize so we can set _i2i_entry and _from_interpreted_entry | |
| 441 void set_interpreter_entry(address entry) { _i2i_entry = entry; _from_interpreted_entry = entry; } | |
| 442 int interpreter_kind(void) { | |
| 443 return constMethod()->interpreter_kind(); | |
| 444 } | |
| 445 void set_interpreter_kind(); | |
| 446 void set_interpreter_kind(int kind) { | |
| 447 constMethod()->set_interpreter_kind(kind); | |
| 448 } | |
| 449 | |
| 450 // native function (used for native methods only) | |
| 451 enum { | |
| 452 native_bind_event_is_interesting = true | |
| 453 }; | |
| 454 address native_function() const { return *(native_function_addr()); } | |
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455 address critical_native_function(); |
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456 |
| 0 | 457 // Must specify a real function (not NULL). |
| 458 // Use clear_native_function() to unregister. | |
| 459 void set_native_function(address function, bool post_event_flag); | |
| 460 bool has_native_function() const; | |
| 461 void clear_native_function(); | |
| 462 | |
| 463 // signature handler (used for native methods only) | |
| 464 address signature_handler() const { return *(signature_handler_addr()); } | |
| 465 void set_signature_handler(address handler); | |
| 466 | |
| 467 // Interpreter oopmap support | |
| 468 void mask_for(int bci, InterpreterOopMap* mask); | |
| 469 | |
| 470 #ifndef PRODUCT | |
| 471 // operations on invocation counter | |
| 1783 | 472 void print_invocation_count(); |
| 0 | 473 #endif |
| 474 | |
| 475 // byte codes | |
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476 void set_code(address code) { return constMethod()->set_code(code); } |
| 0 | 477 address code_base() const { return constMethod()->code_base(); } |
| 478 bool contains(address bcp) const { return constMethod()->contains(bcp); } | |
| 479 | |
| 480 // prints byte codes | |
| 481 void print_codes() const { print_codes_on(tty); } | |
| 482 void print_codes_on(outputStream* st) const PRODUCT_RETURN; | |
| 483 void print_codes_on(int from, int to, outputStream* st) const PRODUCT_RETURN; | |
| 484 | |
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485 // method parameters |
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486 int method_parameters_length() const |
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487 { return constMethod()->method_parameters_length(); } |
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488 MethodParametersElement* method_parameters_start() const |
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489 { return constMethod()->method_parameters_start(); } |
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490 |
| 0 | 491 // checked exceptions |
| 492 int checked_exceptions_length() const | |
| 493 { return constMethod()->checked_exceptions_length(); } | |
| 494 CheckedExceptionElement* checked_exceptions_start() const | |
| 495 { return constMethod()->checked_exceptions_start(); } | |
| 496 | |
| 497 // localvariable table | |
| 498 bool has_localvariable_table() const | |
| 499 { return constMethod()->has_localvariable_table(); } | |
| 500 int localvariable_table_length() const | |
| 501 { return constMethod()->localvariable_table_length(); } | |
| 502 LocalVariableTableElement* localvariable_table_start() const | |
| 503 { return constMethod()->localvariable_table_start(); } | |
| 504 | |
| 505 bool has_linenumber_table() const | |
| 506 { return constMethod()->has_linenumber_table(); } | |
| 507 u_char* compressed_linenumber_table() const | |
| 508 { return constMethod()->compressed_linenumber_table(); } | |
| 509 | |
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510 // method holder (the Klass* holding this method) |
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511 InstanceKlass* method_holder() const { return constants()->pool_holder(); } |
| 0 | 512 |
| 513 void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments) | |
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514 Symbol* klass_name() const; // returns the name of the method holder |
| 0 | 515 BasicType result_type() const; // type of the method result |
| 516 int result_type_index() const; // type index of the method result | |
| 517 bool is_returning_oop() const { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); } | |
| 518 bool is_returning_fp() const { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); } | |
| 519 | |
| 520 // Checked exceptions thrown by this method (resolved to mirrors) | |
| 521 objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); } | |
| 522 | |
| 523 // Access flags | |
| 524 bool is_public() const { return access_flags().is_public(); } | |
| 525 bool is_private() const { return access_flags().is_private(); } | |
| 526 bool is_protected() const { return access_flags().is_protected(); } | |
| 527 bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); } | |
| 528 bool is_static() const { return access_flags().is_static(); } | |
| 529 bool is_final() const { return access_flags().is_final(); } | |
| 530 bool is_synchronized() const { return access_flags().is_synchronized();} | |
| 531 bool is_native() const { return access_flags().is_native(); } | |
| 532 bool is_abstract() const { return access_flags().is_abstract(); } | |
| 533 bool is_strict() const { return access_flags().is_strict(); } | |
| 534 bool is_synthetic() const { return access_flags().is_synthetic(); } | |
| 535 | |
| 536 // returns true if contains only return operation | |
| 537 bool is_empty_method() const; | |
| 538 | |
| 539 // returns true if this is a vanilla constructor | |
| 540 bool is_vanilla_constructor() const; | |
| 541 | |
| 542 // checks method and its method holder | |
| 543 bool is_final_method() const; | |
| 544 bool is_strict_method() const; | |
| 545 | |
| 546 // true if method needs no dynamic dispatch (final and/or no vtable entry) | |
| 547 bool can_be_statically_bound() const; | |
| 548 | |
| 549 // returns true if the method has any backward branches. | |
| 550 bool has_loops() { | |
| 551 return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag(); | |
| 552 }; | |
| 553 | |
| 554 bool compute_has_loops_flag(); | |
| 555 | |
| 556 bool has_jsrs() { | |
| 557 return access_flags().has_jsrs(); | |
| 558 }; | |
| 559 void set_has_jsrs() { | |
| 560 _access_flags.set_has_jsrs(); | |
| 561 } | |
| 562 | |
| 563 // returns true if the method has any monitors. | |
| 564 bool has_monitors() const { return is_synchronized() || access_flags().has_monitor_bytecodes(); } | |
| 565 bool has_monitor_bytecodes() const { return access_flags().has_monitor_bytecodes(); } | |
| 566 | |
| 567 void set_has_monitor_bytecodes() { _access_flags.set_has_monitor_bytecodes(); } | |
| 568 | |
| 569 // monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes | |
| 570 // propererly nest in the method. It might return false, even though they actually nest properly, since the info. | |
| 571 // has not been computed yet. | |
| 572 bool guaranteed_monitor_matching() const { return access_flags().is_monitor_matching(); } | |
| 573 void set_guaranteed_monitor_matching() { _access_flags.set_monitor_matching(); } | |
| 574 | |
| 575 // returns true if the method is an accessor function (setter/getter). | |
| 576 bool is_accessor() const; | |
| 577 | |
| 578 // returns true if the method is an initializer (<init> or <clinit>). | |
| 579 bool is_initializer() const; | |
| 580 | |
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581 // returns true if the method is static OR if the classfile version < 51 |
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582 bool has_valid_initializer_flags() const; |
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583 |
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584 // returns true if the method name is <clinit> and the method has |
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585 // valid static initializer flags. |
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586 bool is_static_initializer() const; |
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587 |
| 0 | 588 // compiled code support |
| 589 // NOTE: code() is inherently racy as deopt can be clearing code | |
| 590 // simultaneously. Use with caution. | |
| 591 bool has_compiled_code() const { return code() != NULL; } | |
| 592 | |
| 593 // sizing | |
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594 static int header_size() { return sizeof(Method)/HeapWordSize; } |
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595 static int size(bool is_native); |
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596 int size() const { return method_size(); } |
| 7956 | 597 #if INCLUDE_SERVICES |
| 598 void collect_statistics(KlassSizeStats *sz) const; | |
| 599 #endif | |
| 0 | 600 |
| 601 // interpreter support | |
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602 static ByteSize const_offset() { return byte_offset_of(Method, _constMethod ); } |
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603 static ByteSize access_flags_offset() { return byte_offset_of(Method, _access_flags ); } |
| 0 | 604 #ifdef CC_INTERP |
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605 static ByteSize result_index_offset() { return byte_offset_of(Method, _result_index ); } |
| 0 | 606 #endif /* CC_INTERP */ |
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607 static ByteSize from_compiled_offset() { return byte_offset_of(Method, _from_compiled_entry); } |
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608 static ByteSize code_offset() { return byte_offset_of(Method, _code); } |
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609 static ByteSize invocation_counter_offset() { return byte_offset_of(Method, _invocation_counter); } |
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610 static ByteSize backedge_counter_offset() { return byte_offset_of(Method, _backedge_counter); } |
| 0 | 611 static ByteSize method_data_offset() { |
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612 return byte_offset_of(Method, _method_data); |
| 0 | 613 } |
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614 static ByteSize interpreter_invocation_counter_offset() { return byte_offset_of(Method, _interpreter_invocation_count); } |
| 0 | 615 #ifndef PRODUCT |
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616 static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(Method, _compiled_invocation_count); } |
| 0 | 617 #endif // not PRODUCT |
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618 static ByteSize native_function_offset() { return in_ByteSize(sizeof(Method)); } |
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619 static ByteSize from_interpreted_offset() { return byte_offset_of(Method, _from_interpreted_entry ); } |
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620 static ByteSize interpreter_entry_offset() { return byte_offset_of(Method, _i2i_entry ); } |
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621 static ByteSize signature_handler_offset() { return in_ByteSize(sizeof(Method) + wordSize); } |
| 0 | 622 |
| 623 // for code generation | |
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624 static int method_data_offset_in_bytes() { return offset_of(Method, _method_data); } |
| 0 | 625 static int interpreter_invocation_counter_offset_in_bytes() |
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626 { return offset_of(Method, _interpreter_invocation_count); } |
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627 static int intrinsic_id_offset_in_bytes() { return offset_of(Method, _intrinsic_id); } |
|
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628 static int intrinsic_id_size_in_bytes() { return sizeof(u1); } |
| 0 | 629 |
| 630 // Static methods that are used to implement member methods where an exposed this pointer | |
| 631 // is needed due to possible GCs | |
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632 static objArrayHandle resolved_checked_exceptions_impl(Method* this_oop, TRAPS); |
| 0 | 633 |
| 634 // Returns the byte code index from the byte code pointer | |
| 635 int bci_from(address bcp) const; | |
| 636 address bcp_from(int bci) const; | |
| 637 int validate_bci_from_bcx(intptr_t bcx) const; | |
| 638 | |
| 639 // Returns the line number for a bci if debugging information for the method is prowided, | |
| 640 // -1 is returned otherwise. | |
| 641 int line_number_from_bci(int bci) const; | |
| 642 | |
| 643 // Reflection support | |
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644 bool is_overridden_in(Klass* k) const; |
| 0 | 645 |
| 710 | 646 // JSR 292 support |
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647 bool is_method_handle_intrinsic() const; // MethodHandles::is_signature_polymorphic_intrinsic(intrinsic_id) |
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648 bool is_compiled_lambda_form() const; // intrinsic_id() == vmIntrinsics::_compiledLambdaForm |
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649 bool has_member_arg() const; // intrinsic_id() == vmIntrinsics::_linkToSpecial, etc. |
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650 static methodHandle make_method_handle_intrinsic(vmIntrinsics::ID iid, // _invokeBasic, _linkToVirtual |
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651 Symbol* signature, //anything at all |
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652 TRAPS); |
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653 static Klass* check_non_bcp_klass(Klass* klass); |
| 710 | 654 // these operate only on invoke methods: |
| 655 // presize interpreter frames for extra interpreter stack entries, if needed | |
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656 // method handles want to be able to push a few extra values (e.g., a bound receiver), and |
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657 // invokedynamic sometimes needs to push a bootstrap method, call site, and arglist, |
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658 // all without checking for a stack overflow |
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659 static int extra_stack_entries() { return EnableInvokeDynamic ? 2 : 0; } |
| 710 | 660 static int extra_stack_words(); // = extra_stack_entries() * Interpreter::stackElementSize() |
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661 |
| 0 | 662 // RedefineClasses() support: |
| 663 bool is_old() const { return access_flags().is_old(); } | |
| 664 void set_is_old() { _access_flags.set_is_old(); } | |
| 665 bool is_obsolete() const { return access_flags().is_obsolete(); } | |
| 666 void set_is_obsolete() { _access_flags.set_is_obsolete(); } | |
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667 bool on_stack() const { return access_flags().on_stack(); } |
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668 void set_on_stack(const bool value); |
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669 |
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670 // see the definition in Method*.cpp for the gory details |
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671 bool should_not_be_cached() const; |
| 0 | 672 |
| 673 // JVMTI Native method prefixing support: | |
| 674 bool is_prefixed_native() const { return access_flags().is_prefixed_native(); } | |
| 675 void set_is_prefixed_native() { _access_flags.set_is_prefixed_native(); } | |
| 676 | |
| 677 // Rewriting support | |
| 678 static methodHandle clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length, | |
| 679 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS); | |
| 680 | |
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681 // jmethodID handling |
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682 // Because the useful life-span of a jmethodID cannot be determined, |
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683 // once created they are never reclaimed. The methods to which they refer, |
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684 // however, can be GC'ed away if the class is unloaded or if the method is |
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685 // made obsolete or deleted -- in these cases, the jmethodID |
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686 // refers to NULL (as is the case for any weak reference). |
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687 static jmethodID make_jmethod_id(ClassLoaderData* loader_data, Method* mh); |
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688 static void destroy_jmethod_id(ClassLoaderData* loader_data, jmethodID mid); |
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689 |
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690 // Use resolve_jmethod_id() in situations where the caller is expected |
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691 // to provide a valid jmethodID; the only sanity checks are in asserts; |
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692 // result guaranteed not to be NULL. |
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693 inline static Method* resolve_jmethod_id(jmethodID mid) { |
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694 assert(mid != NULL, "JNI method id should not be null"); |
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695 return *((Method**)mid); |
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696 } |
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697 |
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698 // Use checked_resolve_jmethod_id() in situations where the caller |
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699 // should provide a valid jmethodID, but might not. NULL is returned |
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700 // when the jmethodID does not refer to a valid method. |
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701 static Method* checked_resolve_jmethod_id(jmethodID mid); |
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702 |
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703 static void change_method_associated_with_jmethod_id(jmethodID old_jmid_ptr, Method* new_method); |
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704 static bool is_method_id(jmethodID mid); |
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705 |
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706 // Clear methods |
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707 static void clear_jmethod_ids(ClassLoaderData* loader_data); |
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708 static void print_jmethod_ids(ClassLoaderData* loader_data, outputStream* out) PRODUCT_RETURN; |
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709 |
| 0 | 710 // Get this method's jmethodID -- allocate if it doesn't exist |
| 711 jmethodID jmethod_id() { methodHandle this_h(this); | |
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712 return InstanceKlass::get_jmethod_id(method_holder(), this_h); } |
| 0 | 713 |
| 714 // Lookup the jmethodID for this method. Return NULL if not found. | |
| 715 // NOTE that this function can be called from a signal handler | |
| 716 // (see AsyncGetCallTrace support for Forte Analyzer) and this | |
| 717 // needs to be async-safe. No allocation should be done and | |
| 718 // so handles are not used to avoid deadlock. | |
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719 jmethodID find_jmethod_id_or_null() { return method_holder()->jmethod_id_or_null(this); } |
| 0 | 720 |
| 721 // JNI static invoke cached itable index accessors | |
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722 int cached_itable_index() { return method_holder()->cached_itable_index(method_idnum()); } |
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723 void set_cached_itable_index(int index) { method_holder()->set_cached_itable_index(method_idnum(), index); } |
| 0 | 724 |
| 725 // Support for inlining of intrinsic methods | |
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726 vmIntrinsics::ID intrinsic_id() const { return (vmIntrinsics::ID) _intrinsic_id; } |
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727 void set_intrinsic_id(vmIntrinsics::ID id) { _intrinsic_id = (u1) id; } |
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728 |
|
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|
729 // Helper routines for intrinsic_id() and vmIntrinsics::method(). |
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730 void init_intrinsic_id(); // updates from _none if a match |
|
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731 static vmSymbols::SID klass_id_for_intrinsics(Klass* holder); |
| 0 | 732 |
|
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|
733 bool jfr_towrite() { return _jfr_towrite; } |
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734 void set_jfr_towrite(bool towrite) { _jfr_towrite = towrite; } |
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735 |
|
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736 bool force_inline() { return _force_inline; } |
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737 void set_force_inline(bool x) { _force_inline = x; } |
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738 bool dont_inline() { return _dont_inline; } |
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739 void set_dont_inline(bool x) { _dont_inline = x; } |
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740 bool is_hidden() { return _hidden; } |
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741 void set_hidden(bool x) { _hidden = x; } |
| 6934 | 742 ConstMethod::MethodType method_type() const { |
| 743 return _constMethod->method_type(); | |
| 744 } | |
| 745 bool is_overpass() const { return method_type() == ConstMethod::OVERPASS; } | |
|
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746 |
| 0 | 747 // On-stack replacement support |
| 1783 | 748 bool has_osr_nmethod(int level, bool match_level) { |
|
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749 return method_holder()->lookup_osr_nmethod(this, InvocationEntryBci, level, match_level) != NULL; |
| 1783 | 750 } |
| 751 | |
| 752 nmethod* lookup_osr_nmethod_for(int bci, int level, bool match_level) { | |
|
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753 return method_holder()->lookup_osr_nmethod(this, bci, level, match_level); |
| 1783 | 754 } |
| 0 | 755 |
| 756 // Inline cache support | |
| 757 void cleanup_inline_caches(); | |
| 758 | |
| 759 // Find if klass for method is loaded | |
| 760 bool is_klass_loaded_by_klass_index(int klass_index) const; | |
| 761 bool is_klass_loaded(int refinfo_index, bool must_be_resolved = false) const; | |
| 762 | |
| 763 // Indicates whether compilation failed earlier for this method, or | |
| 764 // whether it is not compilable for another reason like having a | |
| 765 // breakpoint set in it. | |
|
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766 bool is_not_compilable(int comp_level = CompLevel_any) const; |
| 1783 | 767 void set_not_compilable(int comp_level = CompLevel_all, bool report = true); |
| 768 void set_not_compilable_quietly(int comp_level = CompLevel_all) { | |
|
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769 set_not_compilable(comp_level, false); |
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|
770 } |
|
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|
771 bool is_not_osr_compilable(int comp_level = CompLevel_any) const; |
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772 void set_not_osr_compilable(int comp_level = CompLevel_all, bool report = true); |
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773 void set_not_osr_compilable_quietly(int comp_level = CompLevel_all) { |
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774 set_not_osr_compilable(comp_level, false); |
| 1783 | 775 } |
|
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|
776 |
|
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777 private: |
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|
778 void print_made_not_compilable(int comp_level, bool is_osr, bool report); |
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|
779 |
|
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780 public: |
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781 bool is_not_c1_compilable() const { return access_flags().is_not_c1_compilable(); } |
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782 void set_not_c1_compilable() { _access_flags.set_not_c1_compilable(); } |
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783 bool is_not_c2_compilable() const { return access_flags().is_not_c2_compilable(); } |
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784 void set_not_c2_compilable() { _access_flags.set_not_c2_compilable(); } |
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785 |
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|
786 bool is_not_c1_osr_compilable() const { return is_not_c1_compilable(); } // don't waste an accessFlags bit |
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787 void set_not_c1_osr_compilable() { set_not_c1_compilable(); } // don't waste an accessFlags bit |
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788 bool is_not_c2_osr_compilable() const { return access_flags().is_not_c2_osr_compilable(); } |
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789 void set_not_c2_osr_compilable() { _access_flags.set_not_c2_osr_compilable(); } |
| 0 | 790 |
| 791 // Background compilation support | |
| 1783 | 792 bool queued_for_compilation() const { return access_flags().queued_for_compilation(); } |
| 793 void set_queued_for_compilation() { _access_flags.set_queued_for_compilation(); } | |
| 794 void clear_queued_for_compilation() { _access_flags.clear_queued_for_compilation(); } | |
| 0 | 795 |
| 796 // Resolve all classes in signature, return 'true' if successful | |
| 797 static bool load_signature_classes(methodHandle m, TRAPS); | |
| 798 | |
| 799 // Return if true if not all classes references in signature, including return type, has been loaded | |
| 800 static bool has_unloaded_classes_in_signature(methodHandle m, TRAPS); | |
| 801 | |
| 802 // Printing | |
|
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803 void print_short_name(outputStream* st = tty); // prints as klassname::methodname; Exposed so field engineers can debug VM |
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|
804 #if INCLUDE_JVMTI |
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805 void print_name(outputStream* st = tty); // prints as "virtual void foo(int)"; exposed for TraceRedefineClasses |
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806 #else |
|
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807 void print_name(outputStream* st = tty) PRODUCT_RETURN; // prints as "virtual void foo(int)" |
|
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|
808 #endif |
| 0 | 809 |
| 810 // Helper routine used for method sorting | |
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811 static void sort_methods(Array<Method*>* methods, |
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812 Array<AnnotationArray*>* methods_annotations, |
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813 Array<AnnotationArray*>* methods_parameter_annotations, |
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814 Array<AnnotationArray*>* methods_default_annotations, |
|
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815 Array<AnnotationArray*>* methods_type_annotations, |
| 0 | 816 bool idempotent = false); |
| 817 | |
|
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818 // Deallocation function for redefine classes or if an error occurs |
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819 void deallocate_contents(ClassLoaderData* loader_data); |
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820 |
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821 // Printing |
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822 #ifndef PRODUCT |
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823 void print_on(outputStream* st) const; |
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824 #endif |
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825 void print_value_on(outputStream* st) const; |
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826 |
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827 const char* internal_name() const { return "{method}"; } |
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828 |
|
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829 // Check for valid method pointer |
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830 bool is_valid_method() const; |
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831 |
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832 // Verify |
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833 void verify() { verify_on(tty); } |
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834 void verify_on(outputStream* st); |
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835 |
| 0 | 836 private: |
| 837 | |
| 838 // Inlined elements | |
| 839 address* native_function_addr() const { assert(is_native(), "must be native"); return (address*) (this+1); } | |
| 840 address* signature_handler_addr() const { return native_function_addr() + 1; } | |
| 841 }; | |
| 842 | |
| 843 | |
| 844 // Utility class for compressing line number tables | |
| 845 | |
| 846 class CompressedLineNumberWriteStream: public CompressedWriteStream { | |
| 847 private: | |
| 848 int _bci; | |
| 849 int _line; | |
| 850 public: | |
| 851 // Constructor | |
| 852 CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {} | |
| 853 CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {} | |
| 854 | |
| 855 // Write (bci, line number) pair to stream | |
| 856 void write_pair_regular(int bci_delta, int line_delta); | |
| 857 | |
| 858 inline void write_pair_inline(int bci, int line) { | |
| 859 int bci_delta = bci - _bci; | |
| 860 int line_delta = line - _line; | |
| 861 _bci = bci; | |
| 862 _line = line; | |
| 863 // Skip (0,0) deltas - they do not add information and conflict with terminator. | |
| 864 if (bci_delta == 0 && line_delta == 0) return; | |
| 865 // Check if bci is 5-bit and line number 3-bit unsigned. | |
| 866 if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) { | |
| 867 // Compress into single byte. | |
| 868 jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta; | |
| 869 // Check that value doesn't match escape character. | |
| 870 if (value != 0xFF) { | |
| 871 write_byte(value); | |
| 872 return; | |
| 873 } | |
| 874 } | |
| 875 write_pair_regular(bci_delta, line_delta); | |
| 876 } | |
| 877 | |
| 878 // Windows AMD64 + Apr 2005 PSDK with /O2 generates bad code for write_pair. | |
| 879 // Disabling optimization doesn't work for methods in header files | |
| 880 // so we force it to call through the non-optimized version in the .cpp. | |
| 881 // It's gross, but it's the only way we can ensure that all callers are | |
|
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882 // fixed. _MSC_VER is defined by the windows compiler |
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883 #if defined(_M_AMD64) && _MSC_VER >= 1400 |
| 0 | 884 void write_pair(int bci, int line); |
| 885 #else | |
| 886 void write_pair(int bci, int line) { write_pair_inline(bci, line); } | |
| 887 #endif | |
| 888 | |
| 889 // Write end-of-stream marker | |
| 890 void write_terminator() { write_byte(0); } | |
| 891 }; | |
| 892 | |
| 893 | |
| 894 // Utility class for decompressing line number tables | |
| 895 | |
| 896 class CompressedLineNumberReadStream: public CompressedReadStream { | |
| 897 private: | |
| 898 int _bci; | |
| 899 int _line; | |
| 900 public: | |
| 901 // Constructor | |
| 902 CompressedLineNumberReadStream(u_char* buffer); | |
| 903 // Read (bci, line number) pair from stream. Returns false at end-of-stream. | |
| 904 bool read_pair(); | |
| 905 // Accessing bci and line number (after calling read_pair) | |
| 906 int bci() const { return _bci; } | |
| 907 int line() const { return _line; } | |
| 908 }; | |
| 909 | |
| 910 | |
| 911 /// Fast Breakpoints. | |
| 912 | |
| 913 // If this structure gets more complicated (because bpts get numerous), | |
| 914 // move it into its own header. | |
| 915 | |
| 916 // There is presently no provision for concurrent access | |
| 917 // to breakpoint lists, which is only OK for JVMTI because | |
| 918 // breakpoints are written only at safepoints, and are read | |
| 919 // concurrently only outside of safepoints. | |
| 920 | |
| 6197 | 921 class BreakpointInfo : public CHeapObj<mtClass> { |
| 0 | 922 friend class VMStructs; |
| 923 private: | |
| 924 Bytecodes::Code _orig_bytecode; | |
| 925 int _bci; | |
| 926 u2 _name_index; // of method | |
| 927 u2 _signature_index; // of method | |
| 928 BreakpointInfo* _next; // simple storage allocation | |
| 929 | |
| 930 public: | |
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931 BreakpointInfo(Method* m, int bci); |
| 0 | 932 |
| 933 // accessors | |
| 934 Bytecodes::Code orig_bytecode() { return _orig_bytecode; } | |
| 935 void set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; } | |
| 936 int bci() { return _bci; } | |
| 937 | |
| 938 BreakpointInfo* next() const { return _next; } | |
| 939 void set_next(BreakpointInfo* n) { _next = n; } | |
| 940 | |
| 941 // helps for searchers | |
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942 bool match(const Method* m, int bci) { |
| 0 | 943 return bci == _bci && match(m); |
| 944 } | |
| 945 | |
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946 bool match(const Method* m) { |
| 0 | 947 return _name_index == m->name_index() && |
| 948 _signature_index == m->signature_index(); | |
| 949 } | |
| 950 | |
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951 void set(Method* method); |
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952 void clear(Method* method); |
| 0 | 953 }; |
| 1972 | 954 |
|
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955 // Utility class for access exception handlers |
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956 class ExceptionTable : public StackObj { |
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957 private: |
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958 ExceptionTableElement* _table; |
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959 u2 _length; |
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960 |
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961 public: |
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962 ExceptionTable(Method* m) { |
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963 if (m->has_exception_handler()) { |
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964 _table = m->exception_table_start(); |
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965 _length = m->exception_table_length(); |
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966 } else { |
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967 _table = NULL; |
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968 _length = 0; |
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969 } |
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970 } |
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971 |
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972 int length() const { |
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973 return _length; |
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974 } |
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975 |
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976 u2 start_pc(int idx) const { |
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977 assert(idx < _length, "out of bounds"); |
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978 return _table[idx].start_pc; |
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979 } |
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980 |
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981 void set_start_pc(int idx, u2 value) { |
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982 assert(idx < _length, "out of bounds"); |
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983 _table[idx].start_pc = value; |
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984 } |
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985 |
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986 u2 end_pc(int idx) const { |
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987 assert(idx < _length, "out of bounds"); |
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988 return _table[idx].end_pc; |
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989 } |
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990 |
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991 void set_end_pc(int idx, u2 value) { |
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992 assert(idx < _length, "out of bounds"); |
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993 _table[idx].end_pc = value; |
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994 } |
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995 |
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996 u2 handler_pc(int idx) const { |
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997 assert(idx < _length, "out of bounds"); |
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998 return _table[idx].handler_pc; |
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999 } |
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1000 |
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1001 void set_handler_pc(int idx, u2 value) { |
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1002 assert(idx < _length, "out of bounds"); |
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1003 _table[idx].handler_pc = value; |
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1004 } |
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1005 |
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1006 u2 catch_type_index(int idx) const { |
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1007 assert(idx < _length, "out of bounds"); |
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1008 return _table[idx].catch_type_index; |
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1009 } |
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1010 |
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1011 void set_catch_type_index(int idx, u2 value) { |
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1012 assert(idx < _length, "out of bounds"); |
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1013 _table[idx].catch_type_index = value; |
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1014 } |
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1015 }; |
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1016 |
| 1972 | 1017 #endif // SHARE_VM_OOPS_METHODOOP_HPP |