Wed, 06 Jan 2010 22:21:39 -0800
Merge
duke@435 | 1 | /* |
xdono@1014 | 2 | * Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
duke@435 | 21 | * have any questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
duke@435 | 25 | // A methodOop represents a Java method. |
duke@435 | 26 | // |
duke@435 | 27 | // Memory layout (each line represents a word). Note that most applications load thousands of methods, |
duke@435 | 28 | // so keeping the size of this structure small has a big impact on footprint. |
duke@435 | 29 | // |
duke@435 | 30 | // We put all oops and method_size first for better gc cache locality. |
duke@435 | 31 | // |
duke@435 | 32 | // The actual bytecodes are inlined after the end of the methodOopDesc struct. |
duke@435 | 33 | // |
duke@435 | 34 | // There are bits in the access_flags telling whether inlined tables are present. |
duke@435 | 35 | // Note that accessing the line number and local variable tables is not performance critical at all. |
duke@435 | 36 | // Accessing the checked exceptions table is used by reflection, so we put that last to make access |
duke@435 | 37 | // to it fast. |
duke@435 | 38 | // |
duke@435 | 39 | // The line number table is compressed and inlined following the byte codes. It is found as the first |
duke@435 | 40 | // byte following the byte codes. The checked exceptions table and the local variable table are inlined |
duke@435 | 41 | // after the line number table, and indexed from the end of the method. We do not compress the checked |
duke@435 | 42 | // exceptions table since the average length is less than 2, and do not bother to compress the local |
duke@435 | 43 | // variable table either since it is mostly absent. |
duke@435 | 44 | // |
duke@435 | 45 | // Note that native_function and signature_handler has to be at fixed offsets (required by the interpreter) |
duke@435 | 46 | // |
duke@435 | 47 | // |------------------------------------------------------| |
duke@435 | 48 | // | header | |
duke@435 | 49 | // | klass | |
duke@435 | 50 | // |------------------------------------------------------| |
duke@435 | 51 | // | constMethodOop (oop) | |
duke@435 | 52 | // | constants (oop) | |
duke@435 | 53 | // |------------------------------------------------------| |
duke@435 | 54 | // | methodData (oop) | |
duke@435 | 55 | // | interp_invocation_count | |
duke@435 | 56 | // |------------------------------------------------------| |
duke@435 | 57 | // | access_flags | |
duke@435 | 58 | // | vtable_index | |
duke@435 | 59 | // |------------------------------------------------------| |
duke@435 | 60 | // | result_index (C++ interpreter only) | |
duke@435 | 61 | // |------------------------------------------------------| |
duke@435 | 62 | // | method_size | max_stack | |
duke@435 | 63 | // | max_locals | size_of_parameters | |
duke@435 | 64 | // |------------------------------------------------------| |
duke@435 | 65 | // | intrinsic_id, highest_tier | (unused) | |
duke@435 | 66 | // |------------------------------------------------------| |
duke@435 | 67 | // | throwout_count | num_breakpoints | |
duke@435 | 68 | // |------------------------------------------------------| |
duke@435 | 69 | // | invocation_counter | |
duke@435 | 70 | // | backedge_counter | |
duke@435 | 71 | // |------------------------------------------------------| |
duke@435 | 72 | // | code (pointer) | |
duke@435 | 73 | // | i2i (pointer) | |
duke@435 | 74 | // | adapter (pointer) | |
duke@435 | 75 | // | from_compiled_entry (pointer) | |
duke@435 | 76 | // | from_interpreted_entry (pointer) | |
duke@435 | 77 | // |------------------------------------------------------| |
duke@435 | 78 | // | native_function (present only if native) | |
duke@435 | 79 | // | signature_handler (present only if native) | |
duke@435 | 80 | // |------------------------------------------------------| |
duke@435 | 81 | |
duke@435 | 82 | |
duke@435 | 83 | class CheckedExceptionElement; |
duke@435 | 84 | class LocalVariableTableElement; |
duke@435 | 85 | class AdapterHandlerEntry; |
duke@435 | 86 | |
duke@435 | 87 | class methodDataOopDesc; |
duke@435 | 88 | |
duke@435 | 89 | class methodOopDesc : public oopDesc { |
duke@435 | 90 | friend class methodKlass; |
duke@435 | 91 | friend class VMStructs; |
duke@435 | 92 | private: |
duke@435 | 93 | constMethodOop _constMethod; // Method read-only data. |
duke@435 | 94 | constantPoolOop _constants; // Constant pool |
duke@435 | 95 | methodDataOop _method_data; |
duke@435 | 96 | int _interpreter_invocation_count; // Count of times invoked |
duke@435 | 97 | AccessFlags _access_flags; // Access flags |
duke@435 | 98 | int _vtable_index; // vtable index of this method (see VtableIndexFlag) |
duke@435 | 99 | // note: can have vtables with >2**16 elements (because of inheritance) |
duke@435 | 100 | #ifdef CC_INTERP |
duke@435 | 101 | int _result_index; // C++ interpreter needs for converting results to/from stack |
duke@435 | 102 | #endif |
duke@435 | 103 | u2 _method_size; // size of this object |
duke@435 | 104 | u2 _max_stack; // Maximum number of entries on the expression stack |
duke@435 | 105 | u2 _max_locals; // Number of local variables used by this method |
duke@435 | 106 | u2 _size_of_parameters; // size of the parameter block (receiver + arguments) in words |
jrose@1291 | 107 | u1 _intrinsic_id; // vmSymbols::intrinsic_id (0 == _none) |
duke@435 | 108 | u1 _highest_tier_compile; // Highest compile level this method has ever seen. |
duke@435 | 109 | u2 _interpreter_throwout_count; // Count of times method was exited via exception while interpreting |
duke@435 | 110 | u2 _number_of_breakpoints; // fullspeed debugging support |
duke@435 | 111 | InvocationCounter _invocation_counter; // Incremented before each activation of the method - used to trigger frequency-based optimizations |
duke@435 | 112 | InvocationCounter _backedge_counter; // Incremented before each backedge taken - used to trigger frequencey-based optimizations |
duke@435 | 113 | #ifndef PRODUCT |
duke@435 | 114 | int _compiled_invocation_count; // Number of nmethod invocations so far (for perf. debugging) |
duke@435 | 115 | #endif |
duke@435 | 116 | // Entry point for calling both from and to the interpreter. |
duke@435 | 117 | address _i2i_entry; // All-args-on-stack calling convention |
duke@435 | 118 | // Adapter blob (i2c/c2i) for this methodOop. Set once when method is linked. |
duke@435 | 119 | AdapterHandlerEntry* _adapter; |
duke@435 | 120 | // Entry point for calling from compiled code, to compiled code if it exists |
duke@435 | 121 | // or else the interpreter. |
duke@435 | 122 | volatile address _from_compiled_entry; // Cache of: _code ? _code->entry_point() : _adapter->c2i_entry() |
duke@435 | 123 | // The entry point for calling both from and to compiled code is |
duke@435 | 124 | // "_code->entry_point()". Because of tiered compilation and de-opt, this |
duke@435 | 125 | // field can come and go. It can transition from NULL to not-null at any |
duke@435 | 126 | // time (whenever a compile completes). It can transition from not-null to |
duke@435 | 127 | // NULL only at safepoints (because of a de-opt). |
duke@435 | 128 | nmethod* volatile _code; // Points to the corresponding piece of native code |
duke@435 | 129 | volatile address _from_interpreted_entry; // Cache of _code ? _adapter->i2c_entry() : _i2i_entry |
duke@435 | 130 | |
duke@435 | 131 | public: |
jmasa@953 | 132 | |
jmasa@953 | 133 | static const bool IsUnsafeConc = false; |
jmasa@953 | 134 | static const bool IsSafeConc = true; |
jmasa@953 | 135 | |
duke@435 | 136 | // accessors for instance variables |
duke@435 | 137 | constMethodOop constMethod() const { return _constMethod; } |
duke@435 | 138 | void set_constMethod(constMethodOop xconst) { oop_store_without_check((oop*)&_constMethod, (oop)xconst); } |
duke@435 | 139 | |
duke@435 | 140 | |
duke@435 | 141 | static address make_adapters(methodHandle mh, TRAPS); |
duke@435 | 142 | volatile address from_compiled_entry() const { return (address)OrderAccess::load_ptr_acquire(&_from_compiled_entry); } |
duke@435 | 143 | volatile address from_interpreted_entry() const{ return (address)OrderAccess::load_ptr_acquire(&_from_interpreted_entry); } |
duke@435 | 144 | |
duke@435 | 145 | // access flag |
duke@435 | 146 | AccessFlags access_flags() const { return _access_flags; } |
duke@435 | 147 | void set_access_flags(AccessFlags flags) { _access_flags = flags; } |
duke@435 | 148 | |
duke@435 | 149 | // name |
duke@435 | 150 | symbolOop name() const { return _constants->symbol_at(name_index()); } |
duke@435 | 151 | int name_index() const { return constMethod()->name_index(); } |
duke@435 | 152 | void set_name_index(int index) { constMethod()->set_name_index(index); } |
duke@435 | 153 | |
duke@435 | 154 | // signature |
duke@435 | 155 | symbolOop signature() const { return _constants->symbol_at(signature_index()); } |
duke@435 | 156 | int signature_index() const { return constMethod()->signature_index(); } |
duke@435 | 157 | void set_signature_index(int index) { constMethod()->set_signature_index(index); } |
duke@435 | 158 | |
duke@435 | 159 | // generics support |
duke@435 | 160 | symbolOop generic_signature() const { int idx = generic_signature_index(); return ((idx != 0) ? _constants->symbol_at(idx) : (symbolOop)NULL); } |
duke@435 | 161 | int generic_signature_index() const { return constMethod()->generic_signature_index(); } |
duke@435 | 162 | void set_generic_signature_index(int index) { constMethod()->set_generic_signature_index(index); } |
duke@435 | 163 | |
duke@435 | 164 | // annotations support |
duke@435 | 165 | typeArrayOop annotations() const { return instanceKlass::cast(method_holder())->get_method_annotations_of(method_idnum()); } |
duke@435 | 166 | typeArrayOop parameter_annotations() const { return instanceKlass::cast(method_holder())->get_method_parameter_annotations_of(method_idnum()); } |
duke@435 | 167 | typeArrayOop annotation_default() const { return instanceKlass::cast(method_holder())->get_method_default_annotations_of(method_idnum()); } |
duke@435 | 168 | |
duke@435 | 169 | #ifdef CC_INTERP |
duke@435 | 170 | void set_result_index(BasicType type); |
duke@435 | 171 | int result_index() { return _result_index; } |
duke@435 | 172 | #endif |
duke@435 | 173 | |
duke@435 | 174 | // Helper routine: get klass name + "." + method name + signature as |
duke@435 | 175 | // C string, for the purpose of providing more useful NoSuchMethodErrors |
duke@435 | 176 | // and fatal error handling. The string is allocated in resource |
duke@435 | 177 | // area if a buffer is not provided by the caller. |
duke@435 | 178 | char* name_and_sig_as_C_string(); |
duke@435 | 179 | char* name_and_sig_as_C_string(char* buf, int size); |
duke@435 | 180 | |
duke@435 | 181 | // Static routine in the situations we don't have a methodOop |
duke@435 | 182 | static char* name_and_sig_as_C_string(Klass* klass, symbolOop method_name, symbolOop signature); |
duke@435 | 183 | static char* name_and_sig_as_C_string(Klass* klass, symbolOop method_name, symbolOop signature, char* buf, int size); |
duke@435 | 184 | |
duke@435 | 185 | // JVMTI breakpoints |
duke@435 | 186 | Bytecodes::Code orig_bytecode_at(int bci); |
duke@435 | 187 | void set_orig_bytecode_at(int bci, Bytecodes::Code code); |
duke@435 | 188 | void set_breakpoint(int bci); |
duke@435 | 189 | void clear_breakpoint(int bci); |
duke@435 | 190 | void clear_all_breakpoints(); |
duke@435 | 191 | // Tracking number of breakpoints, for fullspeed debugging. |
duke@435 | 192 | // Only mutated by VM thread. |
duke@435 | 193 | u2 number_of_breakpoints() const { return _number_of_breakpoints; } |
duke@435 | 194 | void incr_number_of_breakpoints() { ++_number_of_breakpoints; } |
duke@435 | 195 | void decr_number_of_breakpoints() { --_number_of_breakpoints; } |
duke@435 | 196 | // Initialization only |
duke@435 | 197 | void clear_number_of_breakpoints() { _number_of_breakpoints = 0; } |
duke@435 | 198 | |
duke@435 | 199 | // index into instanceKlass methods() array |
duke@435 | 200 | u2 method_idnum() const { return constMethod()->method_idnum(); } |
duke@435 | 201 | void set_method_idnum(u2 idnum) { constMethod()->set_method_idnum(idnum); } |
duke@435 | 202 | |
duke@435 | 203 | // code size |
duke@435 | 204 | int code_size() const { return constMethod()->code_size(); } |
duke@435 | 205 | |
duke@435 | 206 | // method size |
duke@435 | 207 | int method_size() const { return _method_size; } |
duke@435 | 208 | void set_method_size(int size) { |
duke@435 | 209 | assert(0 <= size && size < (1 << 16), "invalid method size"); |
duke@435 | 210 | _method_size = size; |
duke@435 | 211 | } |
duke@435 | 212 | |
duke@435 | 213 | // constant pool for klassOop holding this method |
duke@435 | 214 | constantPoolOop constants() const { return _constants; } |
duke@435 | 215 | void set_constants(constantPoolOop c) { oop_store_without_check((oop*)&_constants, c); } |
duke@435 | 216 | |
duke@435 | 217 | // max stack |
duke@435 | 218 | int max_stack() const { return _max_stack; } |
duke@435 | 219 | void set_max_stack(int size) { _max_stack = size; } |
duke@435 | 220 | |
duke@435 | 221 | // max locals |
duke@435 | 222 | int max_locals() const { return _max_locals; } |
duke@435 | 223 | void set_max_locals(int size) { _max_locals = size; } |
duke@435 | 224 | int highest_tier_compile() { return _highest_tier_compile;} |
duke@435 | 225 | void set_highest_tier_compile(int level) { _highest_tier_compile = level;} |
duke@435 | 226 | |
duke@435 | 227 | // Count of times method was exited via exception while interpreting |
duke@435 | 228 | void interpreter_throwout_increment() { |
duke@435 | 229 | if (_interpreter_throwout_count < 65534) { |
duke@435 | 230 | _interpreter_throwout_count++; |
duke@435 | 231 | } |
duke@435 | 232 | } |
duke@435 | 233 | |
duke@435 | 234 | int interpreter_throwout_count() const { return _interpreter_throwout_count; } |
duke@435 | 235 | void set_interpreter_throwout_count(int count) { _interpreter_throwout_count = count; } |
duke@435 | 236 | |
duke@435 | 237 | // size of parameters |
duke@435 | 238 | int size_of_parameters() const { return _size_of_parameters; } |
duke@435 | 239 | |
duke@435 | 240 | bool has_stackmap_table() const { |
duke@435 | 241 | return constMethod()->has_stackmap_table(); |
duke@435 | 242 | } |
duke@435 | 243 | |
duke@435 | 244 | typeArrayOop stackmap_data() const { |
duke@435 | 245 | return constMethod()->stackmap_data(); |
duke@435 | 246 | } |
duke@435 | 247 | |
duke@435 | 248 | // exception handler table |
duke@435 | 249 | typeArrayOop exception_table() const |
duke@435 | 250 | { return constMethod()->exception_table(); } |
duke@435 | 251 | void set_exception_table(typeArrayOop e) |
duke@435 | 252 | { constMethod()->set_exception_table(e); } |
duke@435 | 253 | bool has_exception_handler() const |
duke@435 | 254 | { return constMethod()->has_exception_handler(); } |
duke@435 | 255 | |
duke@435 | 256 | // Finds the first entry point bci of an exception handler for an |
duke@435 | 257 | // exception of klass ex_klass thrown at throw_bci. A value of NULL |
duke@435 | 258 | // for ex_klass indicates that the exception klass is not known; in |
duke@435 | 259 | // this case it matches any constraint class. Returns -1 if the |
duke@435 | 260 | // exception cannot be handled in this method. The handler |
duke@435 | 261 | // constraint classes are loaded if necessary. Note that this may |
duke@435 | 262 | // throw an exception if loading of the constraint classes causes |
duke@435 | 263 | // an IllegalAccessError (bugid 4307310) or an OutOfMemoryError. |
duke@435 | 264 | // If an exception is thrown, returns the bci of the |
duke@435 | 265 | // exception handler which caused the exception to be thrown, which |
duke@435 | 266 | // is needed for proper retries. See, for example, |
duke@435 | 267 | // InterpreterRuntime::exception_handler_for_exception. |
duke@435 | 268 | int fast_exception_handler_bci_for(KlassHandle ex_klass, int throw_bci, TRAPS); |
duke@435 | 269 | |
duke@435 | 270 | // method data access |
duke@435 | 271 | methodDataOop method_data() const { |
duke@435 | 272 | return _method_data; |
duke@435 | 273 | } |
duke@435 | 274 | void set_method_data(methodDataOop data) { |
duke@435 | 275 | oop_store_without_check((oop*)&_method_data, (oop)data); |
duke@435 | 276 | } |
duke@435 | 277 | |
duke@435 | 278 | // invocation counter |
duke@435 | 279 | InvocationCounter* invocation_counter() { return &_invocation_counter; } |
duke@435 | 280 | InvocationCounter* backedge_counter() { return &_backedge_counter; } |
duke@435 | 281 | int invocation_count() const { return _invocation_counter.count(); } |
duke@435 | 282 | int backedge_count() const { return _backedge_counter.count(); } |
duke@435 | 283 | bool was_executed_more_than(int n) const; |
duke@435 | 284 | bool was_never_executed() const { return !was_executed_more_than(0); } |
duke@435 | 285 | |
duke@435 | 286 | static void build_interpreter_method_data(methodHandle method, TRAPS); |
duke@435 | 287 | |
duke@435 | 288 | int interpreter_invocation_count() const { return _interpreter_invocation_count; } |
duke@435 | 289 | void set_interpreter_invocation_count(int count) { _interpreter_invocation_count = count; } |
duke@435 | 290 | int increment_interpreter_invocation_count() { return ++_interpreter_invocation_count; } |
duke@435 | 291 | |
duke@435 | 292 | #ifndef PRODUCT |
duke@435 | 293 | int compiled_invocation_count() const { return _compiled_invocation_count; } |
duke@435 | 294 | void set_compiled_invocation_count(int count) { _compiled_invocation_count = count; } |
duke@435 | 295 | #endif // not PRODUCT |
duke@435 | 296 | |
twisti@1040 | 297 | // Clear (non-shared space) pointers which could not be relevant |
duke@435 | 298 | // if this (shared) method were mapped into another JVM. |
duke@435 | 299 | void remove_unshareable_info(); |
duke@435 | 300 | |
duke@435 | 301 | // nmethod/verified compiler entry |
duke@435 | 302 | address verified_code_entry(); |
duke@435 | 303 | bool check_code() const; // Not inline to avoid circular ref |
duke@435 | 304 | nmethod* volatile code() const { assert( check_code(), "" ); return (nmethod *)OrderAccess::load_ptr_acquire(&_code); } |
duke@435 | 305 | void clear_code(); // Clear out any compiled code |
duke@435 | 306 | void set_code(methodHandle mh, nmethod* code); |
duke@435 | 307 | void set_adapter_entry(AdapterHandlerEntry* adapter) { _adapter = adapter; } |
duke@435 | 308 | address get_i2c_entry(); |
duke@435 | 309 | address get_c2i_entry(); |
duke@435 | 310 | address get_c2i_unverified_entry(); |
duke@435 | 311 | AdapterHandlerEntry* adapter() { return _adapter; } |
duke@435 | 312 | // setup entry points |
duke@435 | 313 | void link_method(methodHandle method, TRAPS); |
duke@435 | 314 | // clear entry points. Used by sharing code |
duke@435 | 315 | void unlink_method(); |
duke@435 | 316 | |
duke@435 | 317 | // vtable index |
duke@435 | 318 | enum VtableIndexFlag { |
duke@435 | 319 | // Valid vtable indexes are non-negative (>= 0). |
duke@435 | 320 | // These few negative values are used as sentinels. |
jrose@1145 | 321 | highest_unused_vtable_index_value = -5, |
duke@435 | 322 | invalid_vtable_index = -4, // distinct from any valid vtable index |
duke@435 | 323 | garbage_vtable_index = -3, // not yet linked; no vtable layout yet |
duke@435 | 324 | nonvirtual_vtable_index = -2 // there is no need for vtable dispatch |
duke@435 | 325 | // 6330203 Note: Do not use -1, which was overloaded with many meanings. |
duke@435 | 326 | }; |
duke@435 | 327 | DEBUG_ONLY(bool valid_vtable_index() const { return _vtable_index >= nonvirtual_vtable_index; }) |
duke@435 | 328 | int vtable_index() const { assert(valid_vtable_index(), ""); |
duke@435 | 329 | return _vtable_index; } |
duke@435 | 330 | void set_vtable_index(int index) { _vtable_index = index; } |
duke@435 | 331 | |
duke@435 | 332 | // interpreter entry |
duke@435 | 333 | address interpreter_entry() const { return _i2i_entry; } |
duke@435 | 334 | // Only used when first initialize so we can set _i2i_entry and _from_interpreted_entry |
duke@435 | 335 | void set_interpreter_entry(address entry) { _i2i_entry = entry; _from_interpreted_entry = entry; } |
duke@435 | 336 | int interpreter_kind(void) { |
duke@435 | 337 | return constMethod()->interpreter_kind(); |
duke@435 | 338 | } |
duke@435 | 339 | void set_interpreter_kind(); |
duke@435 | 340 | void set_interpreter_kind(int kind) { |
duke@435 | 341 | constMethod()->set_interpreter_kind(kind); |
duke@435 | 342 | } |
duke@435 | 343 | |
duke@435 | 344 | // native function (used for native methods only) |
duke@435 | 345 | enum { |
duke@435 | 346 | native_bind_event_is_interesting = true |
duke@435 | 347 | }; |
duke@435 | 348 | address native_function() const { return *(native_function_addr()); } |
duke@435 | 349 | // Must specify a real function (not NULL). |
duke@435 | 350 | // Use clear_native_function() to unregister. |
duke@435 | 351 | void set_native_function(address function, bool post_event_flag); |
duke@435 | 352 | bool has_native_function() const; |
duke@435 | 353 | void clear_native_function(); |
duke@435 | 354 | |
duke@435 | 355 | // signature handler (used for native methods only) |
duke@435 | 356 | address signature_handler() const { return *(signature_handler_addr()); } |
duke@435 | 357 | void set_signature_handler(address handler); |
duke@435 | 358 | |
duke@435 | 359 | // Interpreter oopmap support |
duke@435 | 360 | void mask_for(int bci, InterpreterOopMap* mask); |
duke@435 | 361 | |
duke@435 | 362 | #ifndef PRODUCT |
duke@435 | 363 | // operations on invocation counter |
duke@435 | 364 | void print_invocation_count() const; |
duke@435 | 365 | #endif |
duke@435 | 366 | |
duke@435 | 367 | // byte codes |
twisti@1573 | 368 | void set_code(address code) { return constMethod()->set_code(code); } |
duke@435 | 369 | address code_base() const { return constMethod()->code_base(); } |
duke@435 | 370 | bool contains(address bcp) const { return constMethod()->contains(bcp); } |
duke@435 | 371 | |
duke@435 | 372 | // prints byte codes |
duke@435 | 373 | void print_codes() const { print_codes_on(tty); } |
duke@435 | 374 | void print_codes_on(outputStream* st) const PRODUCT_RETURN; |
duke@435 | 375 | void print_codes_on(int from, int to, outputStream* st) const PRODUCT_RETURN; |
duke@435 | 376 | |
duke@435 | 377 | // checked exceptions |
duke@435 | 378 | int checked_exceptions_length() const |
duke@435 | 379 | { return constMethod()->checked_exceptions_length(); } |
duke@435 | 380 | CheckedExceptionElement* checked_exceptions_start() const |
duke@435 | 381 | { return constMethod()->checked_exceptions_start(); } |
duke@435 | 382 | |
duke@435 | 383 | // localvariable table |
duke@435 | 384 | bool has_localvariable_table() const |
duke@435 | 385 | { return constMethod()->has_localvariable_table(); } |
duke@435 | 386 | int localvariable_table_length() const |
duke@435 | 387 | { return constMethod()->localvariable_table_length(); } |
duke@435 | 388 | LocalVariableTableElement* localvariable_table_start() const |
duke@435 | 389 | { return constMethod()->localvariable_table_start(); } |
duke@435 | 390 | |
duke@435 | 391 | bool has_linenumber_table() const |
duke@435 | 392 | { return constMethod()->has_linenumber_table(); } |
duke@435 | 393 | u_char* compressed_linenumber_table() const |
duke@435 | 394 | { return constMethod()->compressed_linenumber_table(); } |
duke@435 | 395 | |
duke@435 | 396 | // method holder (the klassOop holding this method) |
duke@435 | 397 | klassOop method_holder() const { return _constants->pool_holder(); } |
duke@435 | 398 | |
duke@435 | 399 | void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments) |
duke@435 | 400 | symbolOop klass_name() const; // returns the name of the method holder |
duke@435 | 401 | BasicType result_type() const; // type of the method result |
duke@435 | 402 | int result_type_index() const; // type index of the method result |
duke@435 | 403 | bool is_returning_oop() const { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); } |
duke@435 | 404 | bool is_returning_fp() const { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); } |
duke@435 | 405 | |
duke@435 | 406 | // Checked exceptions thrown by this method (resolved to mirrors) |
duke@435 | 407 | objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); } |
duke@435 | 408 | |
duke@435 | 409 | // Access flags |
duke@435 | 410 | bool is_public() const { return access_flags().is_public(); } |
duke@435 | 411 | bool is_private() const { return access_flags().is_private(); } |
duke@435 | 412 | bool is_protected() const { return access_flags().is_protected(); } |
duke@435 | 413 | bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); } |
duke@435 | 414 | bool is_static() const { return access_flags().is_static(); } |
duke@435 | 415 | bool is_final() const { return access_flags().is_final(); } |
duke@435 | 416 | bool is_synchronized() const { return access_flags().is_synchronized();} |
duke@435 | 417 | bool is_native() const { return access_flags().is_native(); } |
duke@435 | 418 | bool is_abstract() const { return access_flags().is_abstract(); } |
duke@435 | 419 | bool is_strict() const { return access_flags().is_strict(); } |
duke@435 | 420 | bool is_synthetic() const { return access_flags().is_synthetic(); } |
duke@435 | 421 | |
duke@435 | 422 | // returns true if contains only return operation |
duke@435 | 423 | bool is_empty_method() const; |
duke@435 | 424 | |
duke@435 | 425 | // returns true if this is a vanilla constructor |
duke@435 | 426 | bool is_vanilla_constructor() const; |
duke@435 | 427 | |
duke@435 | 428 | // checks method and its method holder |
duke@435 | 429 | bool is_final_method() const; |
duke@435 | 430 | bool is_strict_method() const; |
duke@435 | 431 | |
duke@435 | 432 | // true if method needs no dynamic dispatch (final and/or no vtable entry) |
duke@435 | 433 | bool can_be_statically_bound() const; |
duke@435 | 434 | |
duke@435 | 435 | // returns true if the method has any backward branches. |
duke@435 | 436 | bool has_loops() { |
duke@435 | 437 | return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag(); |
duke@435 | 438 | }; |
duke@435 | 439 | |
duke@435 | 440 | bool compute_has_loops_flag(); |
duke@435 | 441 | |
duke@435 | 442 | bool has_jsrs() { |
duke@435 | 443 | return access_flags().has_jsrs(); |
duke@435 | 444 | }; |
duke@435 | 445 | void set_has_jsrs() { |
duke@435 | 446 | _access_flags.set_has_jsrs(); |
duke@435 | 447 | } |
duke@435 | 448 | |
duke@435 | 449 | // returns true if the method has any monitors. |
duke@435 | 450 | bool has_monitors() const { return is_synchronized() || access_flags().has_monitor_bytecodes(); } |
duke@435 | 451 | bool has_monitor_bytecodes() const { return access_flags().has_monitor_bytecodes(); } |
duke@435 | 452 | |
duke@435 | 453 | void set_has_monitor_bytecodes() { _access_flags.set_has_monitor_bytecodes(); } |
duke@435 | 454 | |
duke@435 | 455 | // monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes |
duke@435 | 456 | // propererly nest in the method. It might return false, even though they actually nest properly, since the info. |
duke@435 | 457 | // has not been computed yet. |
duke@435 | 458 | bool guaranteed_monitor_matching() const { return access_flags().is_monitor_matching(); } |
duke@435 | 459 | void set_guaranteed_monitor_matching() { _access_flags.set_monitor_matching(); } |
duke@435 | 460 | |
duke@435 | 461 | // returns true if the method is an accessor function (setter/getter). |
duke@435 | 462 | bool is_accessor() const; |
duke@435 | 463 | |
duke@435 | 464 | // returns true if the method is an initializer (<init> or <clinit>). |
duke@435 | 465 | bool is_initializer() const; |
duke@435 | 466 | |
duke@435 | 467 | // compiled code support |
duke@435 | 468 | // NOTE: code() is inherently racy as deopt can be clearing code |
duke@435 | 469 | // simultaneously. Use with caution. |
duke@435 | 470 | bool has_compiled_code() const { return code() != NULL; } |
duke@435 | 471 | |
duke@435 | 472 | // sizing |
duke@435 | 473 | static int object_size(bool is_native); |
duke@435 | 474 | static int header_size() { return sizeof(methodOopDesc)/HeapWordSize; } |
duke@435 | 475 | int object_size() const { return method_size(); } |
duke@435 | 476 | |
duke@435 | 477 | bool object_is_parsable() const { return method_size() > 0; } |
duke@435 | 478 | |
duke@435 | 479 | // interpreter support |
duke@435 | 480 | static ByteSize const_offset() { return byte_offset_of(methodOopDesc, _constMethod ); } |
duke@435 | 481 | static ByteSize constants_offset() { return byte_offset_of(methodOopDesc, _constants ); } |
duke@435 | 482 | static ByteSize access_flags_offset() { return byte_offset_of(methodOopDesc, _access_flags ); } |
duke@435 | 483 | #ifdef CC_INTERP |
duke@435 | 484 | static ByteSize result_index_offset() { return byte_offset_of(methodOopDesc, _result_index ); } |
duke@435 | 485 | #endif /* CC_INTERP */ |
duke@435 | 486 | static ByteSize size_of_locals_offset() { return byte_offset_of(methodOopDesc, _max_locals ); } |
duke@435 | 487 | static ByteSize size_of_parameters_offset() { return byte_offset_of(methodOopDesc, _size_of_parameters); } |
duke@435 | 488 | static ByteSize from_compiled_offset() { return byte_offset_of(methodOopDesc, _from_compiled_entry); } |
duke@435 | 489 | static ByteSize code_offset() { return byte_offset_of(methodOopDesc, _code); } |
duke@435 | 490 | static ByteSize invocation_counter_offset() { return byte_offset_of(methodOopDesc, _invocation_counter); } |
duke@435 | 491 | static ByteSize backedge_counter_offset() { return byte_offset_of(methodOopDesc, _backedge_counter); } |
duke@435 | 492 | static ByteSize method_data_offset() { |
duke@435 | 493 | return byte_offset_of(methodOopDesc, _method_data); |
duke@435 | 494 | } |
duke@435 | 495 | static ByteSize interpreter_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _interpreter_invocation_count); } |
duke@435 | 496 | #ifndef PRODUCT |
duke@435 | 497 | static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _compiled_invocation_count); } |
duke@435 | 498 | #endif // not PRODUCT |
duke@435 | 499 | static ByteSize native_function_offset() { return in_ByteSize(sizeof(methodOopDesc)); } |
duke@435 | 500 | static ByteSize from_interpreted_offset() { return byte_offset_of(methodOopDesc, _from_interpreted_entry ); } |
duke@435 | 501 | static ByteSize interpreter_entry_offset() { return byte_offset_of(methodOopDesc, _i2i_entry ); } |
duke@435 | 502 | static ByteSize signature_handler_offset() { return in_ByteSize(sizeof(methodOopDesc) + wordSize); } |
duke@435 | 503 | static ByteSize max_stack_offset() { return byte_offset_of(methodOopDesc, _max_stack ); } |
duke@435 | 504 | |
duke@435 | 505 | // for code generation |
duke@435 | 506 | static int method_data_offset_in_bytes() { return offset_of(methodOopDesc, _method_data); } |
duke@435 | 507 | static int interpreter_invocation_counter_offset_in_bytes() |
duke@435 | 508 | { return offset_of(methodOopDesc, _interpreter_invocation_count); } |
duke@435 | 509 | |
duke@435 | 510 | // Static methods that are used to implement member methods where an exposed this pointer |
duke@435 | 511 | // is needed due to possible GCs |
duke@435 | 512 | static objArrayHandle resolved_checked_exceptions_impl(methodOop this_oop, TRAPS); |
duke@435 | 513 | |
duke@435 | 514 | // Returns the byte code index from the byte code pointer |
duke@435 | 515 | int bci_from(address bcp) const; |
duke@435 | 516 | address bcp_from(int bci) const; |
duke@435 | 517 | int validate_bci_from_bcx(intptr_t bcx) const; |
duke@435 | 518 | |
duke@435 | 519 | // Returns the line number for a bci if debugging information for the method is prowided, |
duke@435 | 520 | // -1 is returned otherwise. |
duke@435 | 521 | int line_number_from_bci(int bci) const; |
duke@435 | 522 | |
duke@435 | 523 | // Reflection support |
duke@435 | 524 | bool is_overridden_in(klassOop k) const; |
duke@435 | 525 | |
jrose@1145 | 526 | // JSR 292 support |
jrose@1145 | 527 | bool is_method_handle_invoke() const { return access_flags().is_method_handle_invoke(); } |
jrose@1145 | 528 | static methodHandle make_invoke_method(KlassHandle holder, |
jrose@1145 | 529 | symbolHandle signature, |
jrose@1145 | 530 | Handle method_type, |
jrose@1145 | 531 | TRAPS); |
jrose@1145 | 532 | // these operate only on invoke methods: |
jrose@1145 | 533 | oop method_handle_type() const; |
jrose@1145 | 534 | static jint* method_type_offsets_chain(); // series of pointer-offsets, terminated by -1 |
jrose@1145 | 535 | // presize interpreter frames for extra interpreter stack entries, if needed |
jrose@1161 | 536 | // method handles want to be able to push a few extra values (e.g., a bound receiver), and |
jrose@1161 | 537 | // invokedynamic sometimes needs to push a bootstrap method, call site, and arglist, |
jrose@1161 | 538 | // all without checking for a stack overflow |
jrose@1161 | 539 | static int extra_stack_entries() { return (EnableMethodHandles ? (int)MethodHandlePushLimit : 0) + (EnableInvokeDynamic ? 3 : 0); } |
jrose@1145 | 540 | static int extra_stack_words(); // = extra_stack_entries() * Interpreter::stackElementSize() |
duke@435 | 541 | // RedefineClasses() support: |
duke@435 | 542 | bool is_old() const { return access_flags().is_old(); } |
duke@435 | 543 | void set_is_old() { _access_flags.set_is_old(); } |
duke@435 | 544 | bool is_obsolete() const { return access_flags().is_obsolete(); } |
duke@435 | 545 | void set_is_obsolete() { _access_flags.set_is_obsolete(); } |
dcubed@483 | 546 | // see the definition in methodOop.cpp for the gory details |
dcubed@483 | 547 | bool should_not_be_cached() const; |
duke@435 | 548 | |
duke@435 | 549 | // JVMTI Native method prefixing support: |
duke@435 | 550 | bool is_prefixed_native() const { return access_flags().is_prefixed_native(); } |
duke@435 | 551 | void set_is_prefixed_native() { _access_flags.set_is_prefixed_native(); } |
duke@435 | 552 | |
duke@435 | 553 | // Rewriting support |
duke@435 | 554 | static methodHandle clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length, |
duke@435 | 555 | u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS); |
duke@435 | 556 | |
duke@435 | 557 | // Get this method's jmethodID -- allocate if it doesn't exist |
duke@435 | 558 | jmethodID jmethod_id() { methodHandle this_h(this); |
dcubed@1412 | 559 | return instanceKlass::get_jmethod_id(method_holder(), this_h); } |
duke@435 | 560 | |
duke@435 | 561 | // Lookup the jmethodID for this method. Return NULL if not found. |
duke@435 | 562 | // NOTE that this function can be called from a signal handler |
duke@435 | 563 | // (see AsyncGetCallTrace support for Forte Analyzer) and this |
duke@435 | 564 | // needs to be async-safe. No allocation should be done and |
duke@435 | 565 | // so handles are not used to avoid deadlock. |
duke@435 | 566 | jmethodID find_jmethod_id_or_null() { return instanceKlass::cast(method_holder())->jmethod_id_or_null(this); } |
duke@435 | 567 | |
duke@435 | 568 | // JNI static invoke cached itable index accessors |
duke@435 | 569 | int cached_itable_index() { return instanceKlass::cast(method_holder())->cached_itable_index(method_idnum()); } |
duke@435 | 570 | void set_cached_itable_index(int index) { instanceKlass::cast(method_holder())->set_cached_itable_index(method_idnum(), index); } |
duke@435 | 571 | |
duke@435 | 572 | // Support for inlining of intrinsic methods |
jrose@1291 | 573 | vmIntrinsics::ID intrinsic_id() const { return (vmIntrinsics::ID) _intrinsic_id; } |
jrose@1291 | 574 | void set_intrinsic_id(vmIntrinsics::ID id) { _intrinsic_id = (u1) id; } |
jrose@1291 | 575 | |
jrose@1291 | 576 | // Helper routines for intrinsic_id() and vmIntrinsics::method(). |
jrose@1291 | 577 | void init_intrinsic_id(); // updates from _none if a match |
jrose@1291 | 578 | static vmSymbols::SID klass_id_for_intrinsics(klassOop holder); |
duke@435 | 579 | |
duke@435 | 580 | // On-stack replacement support |
duke@435 | 581 | bool has_osr_nmethod() { return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, InvocationEntryBci) != NULL; } |
duke@435 | 582 | nmethod* lookup_osr_nmethod_for(int bci) { return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, bci); } |
duke@435 | 583 | |
duke@435 | 584 | // Inline cache support |
duke@435 | 585 | void cleanup_inline_caches(); |
duke@435 | 586 | |
duke@435 | 587 | // Find if klass for method is loaded |
duke@435 | 588 | bool is_klass_loaded_by_klass_index(int klass_index) const; |
duke@435 | 589 | bool is_klass_loaded(int refinfo_index, bool must_be_resolved = false) const; |
duke@435 | 590 | |
duke@435 | 591 | // Indicates whether compilation failed earlier for this method, or |
duke@435 | 592 | // whether it is not compilable for another reason like having a |
duke@435 | 593 | // breakpoint set in it. |
duke@435 | 594 | bool is_not_compilable(int comp_level = CompLevel_highest_tier) const; |
duke@435 | 595 | void set_not_compilable(int comp_level = CompLevel_highest_tier); |
duke@435 | 596 | |
duke@435 | 597 | bool is_not_osr_compilable() const { return is_not_compilable() || access_flags().is_not_osr_compilable(); } |
duke@435 | 598 | void set_not_osr_compilable() { _access_flags.set_not_osr_compilable(); } |
duke@435 | 599 | |
duke@435 | 600 | bool is_not_tier1_compilable() const { return access_flags().is_not_tier1_compilable(); } |
duke@435 | 601 | void set_not_tier1_compilable() { _access_flags.set_not_tier1_compilable(); } |
duke@435 | 602 | |
duke@435 | 603 | // Background compilation support |
duke@435 | 604 | bool queued_for_compilation() const { return access_flags().queued_for_compilation(); } |
duke@435 | 605 | void set_queued_for_compilation() { _access_flags.set_queued_for_compilation(); } |
duke@435 | 606 | void clear_queued_for_compilation() { _access_flags.clear_queued_for_compilation(); } |
duke@435 | 607 | |
duke@435 | 608 | static methodOop method_from_bcp(address bcp); |
duke@435 | 609 | |
duke@435 | 610 | // Resolve all classes in signature, return 'true' if successful |
duke@435 | 611 | static bool load_signature_classes(methodHandle m, TRAPS); |
duke@435 | 612 | |
duke@435 | 613 | // Return if true if not all classes references in signature, including return type, has been loaded |
duke@435 | 614 | static bool has_unloaded_classes_in_signature(methodHandle m, TRAPS); |
duke@435 | 615 | |
duke@435 | 616 | // Printing |
duke@435 | 617 | void print_short_name(outputStream* st) /*PRODUCT_RETURN*/; // prints as klassname::methodname; Exposed so field engineers can debug VM |
duke@435 | 618 | void print_name(outputStream* st) PRODUCT_RETURN; // prints as "virtual void foo(int)" |
duke@435 | 619 | |
duke@435 | 620 | // Helper routine used for method sorting |
duke@435 | 621 | static void sort_methods(objArrayOop methods, |
duke@435 | 622 | objArrayOop methods_annotations, |
duke@435 | 623 | objArrayOop methods_parameter_annotations, |
duke@435 | 624 | objArrayOop methods_default_annotations, |
duke@435 | 625 | bool idempotent = false); |
duke@435 | 626 | |
duke@435 | 627 | // size of parameters |
duke@435 | 628 | void set_size_of_parameters(int size) { _size_of_parameters = size; } |
duke@435 | 629 | private: |
duke@435 | 630 | |
duke@435 | 631 | // Inlined elements |
duke@435 | 632 | address* native_function_addr() const { assert(is_native(), "must be native"); return (address*) (this+1); } |
duke@435 | 633 | address* signature_handler_addr() const { return native_function_addr() + 1; } |
duke@435 | 634 | |
duke@435 | 635 | // Garbage collection support |
duke@435 | 636 | oop* adr_constMethod() const { return (oop*)&_constMethod; } |
duke@435 | 637 | oop* adr_constants() const { return (oop*)&_constants; } |
duke@435 | 638 | oop* adr_method_data() const { return (oop*)&_method_data; } |
duke@435 | 639 | }; |
duke@435 | 640 | |
duke@435 | 641 | |
duke@435 | 642 | // Utility class for compressing line number tables |
duke@435 | 643 | |
duke@435 | 644 | class CompressedLineNumberWriteStream: public CompressedWriteStream { |
duke@435 | 645 | private: |
duke@435 | 646 | int _bci; |
duke@435 | 647 | int _line; |
duke@435 | 648 | public: |
duke@435 | 649 | // Constructor |
duke@435 | 650 | CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {} |
duke@435 | 651 | CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {} |
duke@435 | 652 | |
duke@435 | 653 | // Write (bci, line number) pair to stream |
duke@435 | 654 | void write_pair_regular(int bci_delta, int line_delta); |
duke@435 | 655 | |
duke@435 | 656 | inline void write_pair_inline(int bci, int line) { |
duke@435 | 657 | int bci_delta = bci - _bci; |
duke@435 | 658 | int line_delta = line - _line; |
duke@435 | 659 | _bci = bci; |
duke@435 | 660 | _line = line; |
duke@435 | 661 | // Skip (0,0) deltas - they do not add information and conflict with terminator. |
duke@435 | 662 | if (bci_delta == 0 && line_delta == 0) return; |
duke@435 | 663 | // Check if bci is 5-bit and line number 3-bit unsigned. |
duke@435 | 664 | if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) { |
duke@435 | 665 | // Compress into single byte. |
duke@435 | 666 | jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta; |
duke@435 | 667 | // Check that value doesn't match escape character. |
duke@435 | 668 | if (value != 0xFF) { |
duke@435 | 669 | write_byte(value); |
duke@435 | 670 | return; |
duke@435 | 671 | } |
duke@435 | 672 | } |
duke@435 | 673 | write_pair_regular(bci_delta, line_delta); |
duke@435 | 674 | } |
duke@435 | 675 | |
duke@435 | 676 | // Windows AMD64 + Apr 2005 PSDK with /O2 generates bad code for write_pair. |
duke@435 | 677 | // Disabling optimization doesn't work for methods in header files |
duke@435 | 678 | // so we force it to call through the non-optimized version in the .cpp. |
duke@435 | 679 | // It's gross, but it's the only way we can ensure that all callers are |
duke@435 | 680 | // fixed. MSC_VER is defined in build/windows/makefiles/compile.make. |
duke@435 | 681 | #if defined(_M_AMD64) && MSC_VER >= 1400 |
duke@435 | 682 | void write_pair(int bci, int line); |
duke@435 | 683 | #else |
duke@435 | 684 | void write_pair(int bci, int line) { write_pair_inline(bci, line); } |
duke@435 | 685 | #endif |
duke@435 | 686 | |
duke@435 | 687 | // Write end-of-stream marker |
duke@435 | 688 | void write_terminator() { write_byte(0); } |
duke@435 | 689 | }; |
duke@435 | 690 | |
duke@435 | 691 | |
duke@435 | 692 | // Utility class for decompressing line number tables |
duke@435 | 693 | |
duke@435 | 694 | class CompressedLineNumberReadStream: public CompressedReadStream { |
duke@435 | 695 | private: |
duke@435 | 696 | int _bci; |
duke@435 | 697 | int _line; |
duke@435 | 698 | public: |
duke@435 | 699 | // Constructor |
duke@435 | 700 | CompressedLineNumberReadStream(u_char* buffer); |
duke@435 | 701 | // Read (bci, line number) pair from stream. Returns false at end-of-stream. |
duke@435 | 702 | bool read_pair(); |
duke@435 | 703 | // Accessing bci and line number (after calling read_pair) |
duke@435 | 704 | int bci() const { return _bci; } |
duke@435 | 705 | int line() const { return _line; } |
duke@435 | 706 | }; |
duke@435 | 707 | |
duke@435 | 708 | |
duke@435 | 709 | /// Fast Breakpoints. |
duke@435 | 710 | |
duke@435 | 711 | // If this structure gets more complicated (because bpts get numerous), |
duke@435 | 712 | // move it into its own header. |
duke@435 | 713 | |
duke@435 | 714 | // There is presently no provision for concurrent access |
duke@435 | 715 | // to breakpoint lists, which is only OK for JVMTI because |
duke@435 | 716 | // breakpoints are written only at safepoints, and are read |
duke@435 | 717 | // concurrently only outside of safepoints. |
duke@435 | 718 | |
duke@435 | 719 | class BreakpointInfo : public CHeapObj { |
duke@435 | 720 | friend class VMStructs; |
duke@435 | 721 | private: |
duke@435 | 722 | Bytecodes::Code _orig_bytecode; |
duke@435 | 723 | int _bci; |
duke@435 | 724 | u2 _name_index; // of method |
duke@435 | 725 | u2 _signature_index; // of method |
duke@435 | 726 | BreakpointInfo* _next; // simple storage allocation |
duke@435 | 727 | |
duke@435 | 728 | public: |
duke@435 | 729 | BreakpointInfo(methodOop m, int bci); |
duke@435 | 730 | |
duke@435 | 731 | // accessors |
duke@435 | 732 | Bytecodes::Code orig_bytecode() { return _orig_bytecode; } |
duke@435 | 733 | void set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; } |
duke@435 | 734 | int bci() { return _bci; } |
duke@435 | 735 | |
duke@435 | 736 | BreakpointInfo* next() const { return _next; } |
duke@435 | 737 | void set_next(BreakpointInfo* n) { _next = n; } |
duke@435 | 738 | |
duke@435 | 739 | // helps for searchers |
duke@435 | 740 | bool match(methodOop m, int bci) { |
duke@435 | 741 | return bci == _bci && match(m); |
duke@435 | 742 | } |
duke@435 | 743 | |
duke@435 | 744 | bool match(methodOop m) { |
duke@435 | 745 | return _name_index == m->name_index() && |
duke@435 | 746 | _signature_index == m->signature_index(); |
duke@435 | 747 | } |
duke@435 | 748 | |
duke@435 | 749 | void set(methodOop method); |
duke@435 | 750 | void clear(methodOop method); |
duke@435 | 751 | }; |