Mercurial > hg > truffle
annotate src/share/vm/ci/ciMethod.hpp @ 2142:8012aa3ccede
4926272: methodOopDesc::method_from_bcp is unsafe
Reviewed-by: coleenp, jrose, kvn, dcubed
| author | never |
|---|---|
| date | Thu, 13 Jan 2011 22:15:41 -0800 |
| parents | 5ddfcf4b079e |
| children | 2a23b1b5a0a8 |
| rev | line source |
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| 0 | 1 /* |
| 2142 | 2 * Copyright (c) 1999, 2011, 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_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 | |
| 0 | 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 methodOop in the HotSpot virtual | |
| 46 // machine. | |
| 47 class ciMethod : public ciObject { | |
| 48 friend class CompileBroker; | |
| 49 CI_PACKAGE_ACCESS | |
| 50 friend class ciEnv; | |
| 51 friend class ciExceptionHandlerStream; | |
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52 friend class ciBytecodeStream; |
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53 friend class ciMethodHandle; |
| 0 | 54 |
| 55 private: | |
| 56 // General method information. | |
| 57 ciFlags _flags; | |
| 58 ciSymbol* _name; | |
| 59 ciInstanceKlass* _holder; | |
| 60 ciSignature* _signature; | |
| 61 ciMethodData* _method_data; | |
| 62 ciMethodBlocks* _method_blocks; | |
| 63 | |
| 64 // Code attributes. | |
| 65 int _code_size; | |
| 66 int _max_stack; | |
| 67 int _max_locals; | |
| 68 vmIntrinsics::ID _intrinsic_id; | |
| 69 int _handler_count; | |
| 70 int _interpreter_invocation_count; | |
| 71 int _interpreter_throwout_count; | |
| 72 | |
| 73 bool _uses_monitors; | |
| 74 bool _balanced_monitors; | |
| 1783 | 75 bool _is_c1_compilable; |
| 76 bool _is_c2_compilable; | |
| 0 | 77 bool _can_be_statically_bound; |
| 78 | |
| 79 // Lazy fields, filled in on demand | |
| 80 address _code; | |
| 81 ciExceptionHandler** _exception_handlers; | |
| 82 | |
| 83 // Optional liveness analyzer. | |
| 84 MethodLiveness* _liveness; | |
| 1692 | 85 #if defined(COMPILER2) || defined(SHARK) |
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86 ciTypeFlow* _flow; |
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87 BCEscapeAnalyzer* _bcea; |
| 0 | 88 #endif |
| 89 | |
| 90 ciMethod(methodHandle h_m); | |
| 91 ciMethod(ciInstanceKlass* holder, ciSymbol* name, ciSymbol* signature); | |
| 92 | |
| 93 methodOop get_methodOop() const { | |
| 94 methodOop m = (methodOop)get_oop(); | |
| 95 assert(m != NULL, "illegal use of unloaded method"); | |
| 96 return m; | |
| 97 } | |
| 98 | |
| 99 oop loader() const { return _holder->loader(); } | |
| 100 | |
| 101 const char* type_string() { return "ciMethod"; } | |
| 102 | |
| 103 void print_impl(outputStream* st); | |
| 104 | |
| 105 void load_code(); | |
| 106 | |
| 107 void check_is_loaded() const { assert(is_loaded(), "not loaded"); } | |
| 108 | |
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109 bool ensure_method_data(methodHandle h_m); |
| 0 | 110 |
| 111 void code_at_put(int bci, Bytecodes::Code code) { | |
| 112 Bytecodes::check(code); | |
| 113 assert(0 <= bci && bci < code_size(), "valid bci"); | |
| 114 address bcp = _code + bci; | |
| 115 *bcp = code; | |
| 116 } | |
| 117 | |
| 118 public: | |
| 119 // Basic method information. | |
| 120 ciFlags flags() const { check_is_loaded(); return _flags; } | |
| 121 ciSymbol* name() const { return _name; } | |
| 122 ciInstanceKlass* holder() const { return _holder; } | |
| 123 ciMethodData* method_data(); | |
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124 ciMethodData* method_data_or_null(); |
| 0 | 125 |
| 126 // Signature information. | |
| 127 ciSignature* signature() const { return _signature; } | |
| 128 ciType* return_type() const { return _signature->return_type(); } | |
| 129 int arg_size_no_receiver() const { return _signature->size(); } | |
| 130 int arg_size() const { return _signature->size() + (_flags.is_static() ? 0 : 1); } | |
| 131 | |
| 132 // Method code and related information. | |
| 133 address code() { if (_code == NULL) load_code(); return _code; } | |
| 134 int code_size() const { check_is_loaded(); return _code_size; } | |
| 135 int max_stack() const { check_is_loaded(); return _max_stack; } | |
| 136 int max_locals() const { check_is_loaded(); return _max_locals; } | |
| 137 vmIntrinsics::ID intrinsic_id() const { check_is_loaded(); return _intrinsic_id; } | |
| 138 bool has_exception_handlers() const { check_is_loaded(); return _handler_count > 0; } | |
| 139 int exception_table_length() const { check_is_loaded(); return _handler_count; } | |
| 140 int interpreter_invocation_count() const { check_is_loaded(); return _interpreter_invocation_count; } | |
| 141 int interpreter_throwout_count() const { check_is_loaded(); return _interpreter_throwout_count; } | |
| 142 | |
| 1783 | 143 int comp_level(); |
| 144 | |
| 0 | 145 Bytecodes::Code java_code_at_bci(int bci) { |
| 146 address bcp = code() + bci; | |
| 2142 | 147 return Bytecodes::java_code_at(NULL, bcp); |
| 0 | 148 } |
| 149 BCEscapeAnalyzer *get_bcea(); | |
| 150 ciMethodBlocks *get_method_blocks(); | |
| 151 | |
| 152 bool has_linenumber_table() const; // length unknown until decompression | |
| 153 u_char* compressed_linenumber_table() const; // not preserved by gc | |
| 154 | |
| 155 int line_number_from_bci(int bci) const; | |
| 156 | |
| 157 // Runtime information. | |
| 158 int vtable_index(); | |
| 1692 | 159 #ifdef SHARK |
| 160 int itable_index(); | |
| 161 #endif // SHARK | |
| 0 | 162 address native_entry(); |
| 163 address interpreter_entry(); | |
| 164 | |
| 165 // Analysis and profiling. | |
| 166 // | |
| 167 // Usage note: liveness_at_bci and init_vars should be wrapped in ResourceMarks. | |
| 168 bool uses_monitors() const { return _uses_monitors; } // this one should go away, it has a misleading name | |
| 169 bool has_monitor_bytecodes() const { return _uses_monitors; } | |
| 170 bool has_balanced_monitors(); | |
| 171 | |
| 991 | 172 // Returns a bitmap indicating which locals are required to be |
| 173 // maintained as live for deopt. raw_liveness_at_bci is always the | |
| 174 // direct output of the liveness computation while liveness_at_bci | |
| 175 // may mark all locals as live to improve support for debugging Java | |
| 176 // code by maintaining the state of as many locals as possible. | |
| 177 MethodLivenessResult raw_liveness_at_bci(int bci); | |
| 0 | 178 MethodLivenessResult liveness_at_bci(int bci); |
| 179 | |
| 180 // Get the interpreters viewpoint on oop liveness. MethodLiveness is | |
| 181 // conservative in the sense that it may consider locals to be live which | |
| 182 // cannot be live, like in the case where a local could contain an oop or | |
| 183 // a primitive along different paths. In that case the local must be | |
| 184 // dead when those paths merge. Since the interpreter's viewpoint is | |
| 185 // used when gc'ing an interpreter frame we need to use its viewpoint | |
| 186 // during OSR when loading the locals. | |
| 187 | |
| 188 BitMap live_local_oops_at_bci(int bci); | |
| 189 | |
| 190 #ifdef COMPILER1 | |
| 191 const BitMap bci_block_start(); | |
| 192 #endif | |
| 193 | |
| 194 ciTypeFlow* get_flow_analysis(); | |
| 195 ciTypeFlow* get_osr_flow_analysis(int osr_bci); // alternate entry point | |
| 196 ciCallProfile call_profile_at_bci(int bci); | |
| 197 int interpreter_call_site_count(int bci); | |
| 198 | |
| 199 // Given a certain calling environment, find the monomorphic target | |
| 200 // for the call. Return NULL if the call is not monomorphic in | |
| 201 // its calling environment. | |
| 202 ciMethod* find_monomorphic_target(ciInstanceKlass* caller, | |
| 203 ciInstanceKlass* callee_holder, | |
| 204 ciInstanceKlass* actual_receiver); | |
| 205 | |
| 206 // Given a known receiver klass, find the target for the call. | |
| 207 // Return NULL if the call has no target or is abstract. | |
| 208 ciMethod* resolve_invoke(ciKlass* caller, ciKlass* exact_receiver); | |
| 209 | |
| 210 // Find the proper vtable index to invoke this method. | |
| 211 int resolve_vtable_index(ciKlass* caller, ciKlass* receiver); | |
| 212 | |
| 213 // Compilation directives | |
| 214 bool will_link(ciKlass* accessing_klass, | |
| 215 ciKlass* declared_method_holder, | |
| 216 Bytecodes::Code bc); | |
| 217 bool should_exclude(); | |
| 218 bool should_inline(); | |
| 219 bool should_not_inline(); | |
| 220 bool should_print_assembly(); | |
| 221 bool break_at_execute(); | |
| 222 bool has_option(const char *option); | |
| 223 bool can_be_compiled(); | |
| 224 bool can_be_osr_compiled(int entry_bci); | |
| 225 void set_not_compilable(); | |
| 226 bool has_compiled_code(); | |
| 1783 | 227 int instructions_size(int comp_level = CompLevel_any); |
| 0 | 228 void log_nmethod_identity(xmlStream* log); |
| 229 bool is_not_reached(int bci); | |
| 230 bool was_executed_more_than(int times); | |
| 231 bool has_unloaded_classes_in_signature(); | |
| 232 bool is_klass_loaded(int refinfo_index, bool must_be_resolved) const; | |
| 233 bool check_call(int refinfo_index, bool is_static) const; | |
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234 bool ensure_method_data(); // make sure it exists in the VM also |
| 0 | 235 int scale_count(int count, float prof_factor = 1.); // make MDO count commensurate with IIC |
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236 |
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237 // JSR 292 support |
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238 bool is_method_handle_invoke() const; |
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239 bool is_method_handle_adapter() const; |
| 710 | 240 ciInstance* method_handle_type(); |
| 0 | 241 |
| 242 // What kind of ciObject is this? | |
| 243 bool is_method() { return true; } | |
| 244 | |
| 245 // Java access flags | |
| 246 bool is_public () const { return flags().is_public(); } | |
| 247 bool is_private () const { return flags().is_private(); } | |
| 248 bool is_protected () const { return flags().is_protected(); } | |
| 249 bool is_static () const { return flags().is_static(); } | |
| 250 bool is_final () const { return flags().is_final(); } | |
| 251 bool is_synchronized() const { return flags().is_synchronized(); } | |
| 252 bool is_native () const { return flags().is_native(); } | |
| 253 bool is_interface () const { return flags().is_interface(); } | |
| 254 bool is_abstract () const { return flags().is_abstract(); } | |
| 255 bool is_strict () const { return flags().is_strict(); } | |
| 256 | |
| 257 // Other flags | |
| 258 bool is_empty_method() const; | |
| 259 bool is_vanilla_constructor() const; | |
| 260 bool is_final_method() const { return is_final() || holder()->is_final(); } | |
| 261 bool has_loops () const; | |
| 262 bool has_jsrs () const; | |
| 263 bool is_accessor () const; | |
| 264 bool is_initializer () const; | |
| 265 bool can_be_statically_bound() const { return _can_be_statically_bound; } | |
| 266 | |
| 267 // Print the bytecodes of this method. | |
| 268 void print_codes_on(outputStream* st); | |
| 269 void print_codes() { | |
| 270 print_codes_on(tty); | |
| 271 } | |
| 272 void print_codes_on(int from, int to, outputStream* st); | |
| 273 | |
| 274 // Print the name of this method in various incarnations. | |
| 275 void print_name(outputStream* st = tty); | |
| 276 void print_short_name(outputStream* st = tty); | |
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277 |
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278 methodOop get_method_handle_target() { |
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279 klassOop receiver_limit_oop = NULL; |
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280 int flags = 0; |
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281 return MethodHandles::decode_method(get_oop(), receiver_limit_oop, flags); |
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282 } |
| 0 | 283 }; |
| 1972 | 284 |
| 285 #endif // SHARE_VM_CI_CIMETHOD_HPP |