1 /* 2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. 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 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_CI_CIMETHOD_HPP 26 #define SHARE_VM_CI_CIMETHOD_HPP 27 28 #include "ci/ciFlags.hpp" 29 #include "ci/ciInstanceKlass.hpp" 30 #include "ci/ciObject.hpp" 31 #include "ci/ciSignature.hpp" 32 #include "compiler/methodLiveness.hpp" 33 #include "prims/methodHandles.hpp" 34 #include "utilities/bitMap.hpp" 35 36 class ciMethodBlocks; 37 class MethodLiveness; 38 class BitMap; 39 class Arena; 40 class BCEscapeAnalyzer; 41 42 43 // ciMethod 44 // 45 // This class represents a Method* in the HotSpot virtual 46 // machine. 47 class ciMethod : public ciMetadata { 48 friend class CompileBroker; 49 CI_PACKAGE_ACCESS 50 friend class ciEnv; 51 friend class ciExceptionHandlerStream; 52 friend class ciBytecodeStream; 53 friend class ciMethodHandle; 54 friend class ciReplay; 55 56 private: 57 // General method information. 58 ciFlags _flags; 59 ciSymbol* _name; 60 ciInstanceKlass* _holder; 61 ciSignature* _signature; 62 ciMethodData* _method_data; 63 ciMethodBlocks* _method_blocks; 64 65 // Code attributes. 66 int _code_size; 67 int _max_stack; 68 int _max_locals; 69 vmIntrinsics::ID _intrinsic_id; 70 int _handler_count; 71 int _nmethod_age; 72 int _interpreter_invocation_count; 73 int _interpreter_throwout_count; 74 int _instructions_size; 75 int _size_of_parameters; 76 77 bool _uses_monitors; 78 bool _balanced_monitors; 79 bool _is_c1_compilable; 80 bool _is_c2_compilable; 81 bool _can_be_statically_bound; 82 83 // Lazy fields, filled in on demand 84 address _code; 85 ciExceptionHandler** _exception_handlers; 86 87 // Optional liveness analyzer. 88 MethodLiveness* _liveness; 89 #if defined(COMPILER2) || defined(SHARK) 90 ciTypeFlow* _flow; 91 BCEscapeAnalyzer* _bcea; 92 #endif 93 94 ciMethod(methodHandle h_m); 95 ciMethod(ciInstanceKlass* holder, ciSymbol* name, ciSymbol* signature, ciInstanceKlass* accessor); 96 97 Method* get_Method() const { 98 Method* m = (Method*)_metadata; 99 assert(m != NULL, "illegal use of unloaded method"); 100 return m; 101 } 102 103 oop loader() const { return _holder->loader(); } 104 105 const char* type_string() { return "ciMethod"; } 106 107 void print_impl(outputStream* st); 108 109 void load_code(); 110 111 void check_is_loaded() const { assert(is_loaded(), "not loaded"); } 112 113 bool ensure_method_data(methodHandle h_m); 114 115 void code_at_put(int bci, Bytecodes::Code code) { 116 Bytecodes::check(code); 117 assert(0 <= bci && bci < code_size(), "valid bci"); 118 address bcp = _code + bci; 119 *bcp = code; 120 } 121 122 // Check bytecode and profile data collected are compatible 123 void assert_virtual_call_type_ok(int bci); 124 void assert_call_type_ok(int bci); 125 126 public: 127 // Basic method information. 128 ciFlags flags() const { check_is_loaded(); return _flags; } 129 ciSymbol* name() const { return _name; } 130 ciInstanceKlass* holder() const { return _holder; } 131 ciMethodData* method_data(); 132 ciMethodData* method_data_or_null(); 133 134 // Signature information. 135 ciSignature* signature() const { return _signature; } 136 ciType* return_type() const { return _signature->return_type(); } 137 int arg_size_no_receiver() const { return _signature->size(); } 138 // Can only be used on loaded ciMethods 139 int arg_size() const { 140 check_is_loaded(); 141 return _signature->size() + (_flags.is_static() ? 0 : 1); 142 } 143 // Report the number of elements on stack when invoking this method. 144 // This is different than the regular arg_size because invokedynamic 145 // has an implicit receiver. 146 int invoke_arg_size(Bytecodes::Code code) const { 147 if (is_loaded()) { 148 return arg_size(); 149 } else { 150 int arg_size = _signature->size(); 151 // Add a receiver argument, maybe: 152 if (code != Bytecodes::_invokestatic && 153 code != Bytecodes::_invokedynamic) { 154 arg_size++; 155 } 156 return arg_size; 157 } 158 } 159 160 161 // Method code and related information. 162 address code() { if (_code == NULL) load_code(); return _code; } 163 int code_size() const { check_is_loaded(); return _code_size; } 164 int max_stack() const { check_is_loaded(); return _max_stack; } 165 int max_locals() const { check_is_loaded(); return _max_locals; } 166 vmIntrinsics::ID intrinsic_id() const { check_is_loaded(); return _intrinsic_id; } 167 bool has_exception_handlers() const { check_is_loaded(); return _handler_count > 0; } 168 int exception_table_length() const { check_is_loaded(); return _handler_count; } 169 int interpreter_invocation_count() const { check_is_loaded(); return _interpreter_invocation_count; } 170 int interpreter_throwout_count() const { check_is_loaded(); return _interpreter_throwout_count; } 171 int size_of_parameters() const { check_is_loaded(); return _size_of_parameters; } 172 int nmethod_age() const { check_is_loaded(); return _nmethod_age; } 173 174 // Should the method be compiled with an age counter? 175 bool profile_aging() const; 176 177 // Code size for inlining decisions. 178 int code_size_for_inlining(); 179 180 bool caller_sensitive() { return get_Method()->caller_sensitive(); } 181 bool force_inline() { return get_Method()->force_inline(); } 182 bool dont_inline() { return get_Method()->dont_inline(); } 183 184 int comp_level(); 185 int highest_osr_comp_level(); 186 187 Bytecodes::Code java_code_at_bci(int bci) { 188 address bcp = code() + bci; 189 return Bytecodes::java_code_at(NULL, bcp); 190 } 191 Bytecodes::Code raw_code_at_bci(int bci) { 192 address bcp = code() + bci; 193 return Bytecodes::code_at(NULL, bcp); 194 } 195 BCEscapeAnalyzer *get_bcea(); 196 ciMethodBlocks *get_method_blocks(); 197 198 bool has_linenumber_table() const; // length unknown until decompression 199 u_char* compressed_linenumber_table() const; // not preserved by gc 200 201 int line_number_from_bci(int bci) const; 202 203 // Runtime information. 204 int vtable_index(); 205 #ifdef SHARK 206 int itable_index(); 207 #endif // SHARK 208 address native_entry(); 209 address interpreter_entry(); 210 211 // Analysis and profiling. 212 // 213 // Usage note: liveness_at_bci and init_vars should be wrapped in ResourceMarks. 214 bool has_monitor_bytecodes() const { return _uses_monitors; } 215 bool has_balanced_monitors(); 216 217 // Returns a bitmap indicating which locals are required to be 218 // maintained as live for deopt. raw_liveness_at_bci is always the 219 // direct output of the liveness computation while liveness_at_bci 220 // may mark all locals as live to improve support for debugging Java 221 // code by maintaining the state of as many locals as possible. 222 MethodLivenessResult raw_liveness_at_bci(int bci); 223 MethodLivenessResult liveness_at_bci(int bci); 224 225 // Get the interpreters viewpoint on oop liveness. MethodLiveness is 226 // conservative in the sense that it may consider locals to be live which 227 // cannot be live, like in the case where a local could contain an oop or 228 // a primitive along different paths. In that case the local must be 229 // dead when those paths merge. Since the interpreter's viewpoint is 230 // used when gc'ing an interpreter frame we need to use its viewpoint 231 // during OSR when loading the locals. 232 233 BitMap live_local_oops_at_bci(int bci); 234 235 #ifdef COMPILER1 236 const BitMap bci_block_start(); 237 #endif 238 239 ciTypeFlow* get_flow_analysis(); 240 ciTypeFlow* get_osr_flow_analysis(int osr_bci); // alternate entry point 241 ciCallProfile call_profile_at_bci(int bci); 242 int interpreter_call_site_count(int bci); 243 244 // Does type profiling provide any useful information at this point? 245 bool argument_profiled_type(int bci, int i, ciKlass*& type, bool& maybe_null); 246 bool parameter_profiled_type(int i, ciKlass*& type, bool& maybe_null); 247 bool return_profiled_type(int bci, ciKlass*& type, bool& maybe_null); 248 249 ciField* get_field_at_bci( int bci, bool &will_link); 250 ciMethod* get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature); 251 // Given a certain calling environment, find the monomorphic target 252 // for the call. Return NULL if the call is not monomorphic in 253 // its calling environment. 254 ciMethod* find_monomorphic_target(ciInstanceKlass* caller, 255 ciInstanceKlass* callee_holder, 256 ciInstanceKlass* actual_receiver); 257 258 // Given a known receiver klass, find the target for the call. 259 // Return NULL if the call has no target or is abstract. 260 ciMethod* resolve_invoke(ciKlass* caller, ciKlass* exact_receiver); 261 262 // Find the proper vtable index to invoke this method. 263 int resolve_vtable_index(ciKlass* caller, ciKlass* receiver); 264 265 // Compilation directives 266 bool should_exclude(); 267 bool should_inline(); 268 bool should_not_inline(); 269 bool should_print_assembly(); 270 bool break_at_execute(); 271 bool has_option(const char *option); 272 bool can_be_compiled(); 273 bool can_be_osr_compiled(int entry_bci); 274 void set_not_compilable(const char* reason = NULL); 275 bool has_compiled_code(); 276 void log_nmethod_identity(xmlStream* log); 277 bool is_not_reached(int bci); 278 bool was_executed_more_than(int times); 279 bool has_unloaded_classes_in_signature(); 280 bool is_klass_loaded(int refinfo_index, bool must_be_resolved) const; 281 bool check_call(int refinfo_index, bool is_static) const; 282 bool ensure_method_data(); // make sure it exists in the VM also 283 MethodCounters* ensure_method_counters(); 284 int instructions_size(); 285 int scale_count(int count, float prof_factor = 1.); // make MDO count commensurate with IIC 286 287 // Stack walking support 288 bool is_ignored_by_security_stack_walk() const; 289 290 // JSR 292 support 291 bool is_method_handle_intrinsic() const; 292 bool is_compiled_lambda_form() const; 293 bool has_member_arg() const; 294 295 // What kind of ciObject is this? 296 bool is_method() const { return true; } 297 298 // Java access flags 299 bool is_public () const { return flags().is_public(); } 300 bool is_private () const { return flags().is_private(); } 301 bool is_protected () const { return flags().is_protected(); } 302 bool is_static () const { return flags().is_static(); } 303 bool is_final () const { return flags().is_final(); } 304 bool is_synchronized() const { return flags().is_synchronized(); } 305 bool is_native () const { return flags().is_native(); } 306 bool is_interface () const { return flags().is_interface(); } 307 bool is_abstract () const { return flags().is_abstract(); } 308 bool is_strict () const { return flags().is_strict(); } 309 310 // Other flags 311 bool is_empty_method() const; 312 bool is_vanilla_constructor() const; 313 bool is_final_method() const { return is_final() || holder()->is_final(); } 314 bool has_loops () const; 315 bool has_jsrs () const; 316 bool is_accessor () const; 317 bool is_initializer () const; 318 bool can_be_statically_bound() const { return _can_be_statically_bound; } 319 bool is_boxing_method() const; 320 bool is_unboxing_method() const; 321 322 // Replay data methods 323 void dump_name_as_ascii(outputStream* st); 324 void dump_replay_data(outputStream* st); 325 326 // Print the bytecodes of this method. 327 void print_codes_on(outputStream* st); 328 void print_codes() { 329 print_codes_on(tty); 330 } 331 void print_codes_on(int from, int to, outputStream* st); 332 333 // Print the name of this method in various incarnations. 334 void print_name(outputStream* st = tty); 335 void print_short_name(outputStream* st = tty); 336 }; 337 338 #endif // SHARE_VM_CI_CIMETHOD_HPP