| /* |
| * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| class ciMethodBlocks; |
| class MethodLiveness; |
| class BitMap; |
| class Arena; |
| class BCEscapeAnalyzer; |
| |
| |
| // ciMethod |
| // |
| // This class represents a methodOop in the HotSpot virtual |
| // machine. |
| class ciMethod : public ciObject { |
| friend class CompileBroker; |
| CI_PACKAGE_ACCESS |
| friend class ciEnv; |
| friend class ciExceptionHandlerStream; |
| friend class ciBytecodeStream; |
| friend class ciMethodHandle; |
| |
| private: |
| // General method information. |
| ciFlags _flags; |
| ciSymbol* _name; |
| ciInstanceKlass* _holder; |
| ciSignature* _signature; |
| ciMethodData* _method_data; |
| BCEscapeAnalyzer* _bcea; |
| ciMethodBlocks* _method_blocks; |
| |
| // Code attributes. |
| int _code_size; |
| int _max_stack; |
| int _max_locals; |
| vmIntrinsics::ID _intrinsic_id; |
| int _handler_count; |
| int _interpreter_invocation_count; |
| int _interpreter_throwout_count; |
| |
| bool _uses_monitors; |
| bool _balanced_monitors; |
| bool _is_compilable; |
| bool _can_be_statically_bound; |
| |
| // Lazy fields, filled in on demand |
| address _code; |
| ciExceptionHandler** _exception_handlers; |
| |
| // Optional liveness analyzer. |
| MethodLiveness* _liveness; |
| #ifdef COMPILER2 |
| ciTypeFlow* _flow; |
| #endif |
| |
| ciMethod(methodHandle h_m); |
| ciMethod(ciInstanceKlass* holder, ciSymbol* name, ciSymbol* signature); |
| |
| methodOop get_methodOop() const { |
| methodOop m = (methodOop)get_oop(); |
| assert(m != NULL, "illegal use of unloaded method"); |
| return m; |
| } |
| |
| oop loader() const { return _holder->loader(); } |
| |
| const char* type_string() { return "ciMethod"; } |
| |
| void print_impl(outputStream* st); |
| |
| void load_code(); |
| |
| void check_is_loaded() const { assert(is_loaded(), "not loaded"); } |
| |
| void build_method_data(methodHandle h_m); |
| |
| void code_at_put(int bci, Bytecodes::Code code) { |
| Bytecodes::check(code); |
| assert(0 <= bci && bci < code_size(), "valid bci"); |
| address bcp = _code + bci; |
| *bcp = code; |
| } |
| |
| public: |
| // Basic method information. |
| ciFlags flags() const { check_is_loaded(); return _flags; } |
| ciSymbol* name() const { return _name; } |
| ciInstanceKlass* holder() const { return _holder; } |
| ciMethodData* method_data(); |
| |
| // Signature information. |
| ciSignature* signature() const { return _signature; } |
| ciType* return_type() const { return _signature->return_type(); } |
| int arg_size_no_receiver() const { return _signature->size(); } |
| int arg_size() const { return _signature->size() + (_flags.is_static() ? 0 : 1); } |
| |
| // Method code and related information. |
| address code() { if (_code == NULL) load_code(); return _code; } |
| int code_size() const { check_is_loaded(); return _code_size; } |
| int max_stack() const { check_is_loaded(); return _max_stack; } |
| int max_locals() const { check_is_loaded(); return _max_locals; } |
| vmIntrinsics::ID intrinsic_id() const { check_is_loaded(); return _intrinsic_id; } |
| bool has_exception_handlers() const { check_is_loaded(); return _handler_count > 0; } |
| int exception_table_length() const { check_is_loaded(); return _handler_count; } |
| int interpreter_invocation_count() const { check_is_loaded(); return _interpreter_invocation_count; } |
| int interpreter_throwout_count() const { check_is_loaded(); return _interpreter_throwout_count; } |
| |
| Bytecodes::Code java_code_at_bci(int bci) { |
| address bcp = code() + bci; |
| return Bytecodes::java_code_at(bcp); |
| } |
| BCEscapeAnalyzer *get_bcea(); |
| ciMethodBlocks *get_method_blocks(); |
| |
| bool has_linenumber_table() const; // length unknown until decompression |
| u_char* compressed_linenumber_table() const; // not preserved by gc |
| |
| int line_number_from_bci(int bci) const; |
| |
| // Runtime information. |
| int vtable_index(); |
| address native_entry(); |
| address interpreter_entry(); |
| |
| // Analysis and profiling. |
| // |
| // Usage note: liveness_at_bci and init_vars should be wrapped in ResourceMarks. |
| bool uses_monitors() const { return _uses_monitors; } // this one should go away, it has a misleading name |
| bool has_monitor_bytecodes() const { return _uses_monitors; } |
| bool has_balanced_monitors(); |
| |
| // Returns a bitmap indicating which locals are required to be |
| // maintained as live for deopt. raw_liveness_at_bci is always the |
| // direct output of the liveness computation while liveness_at_bci |
| // may mark all locals as live to improve support for debugging Java |
| // code by maintaining the state of as many locals as possible. |
| MethodLivenessResult raw_liveness_at_bci(int bci); |
| MethodLivenessResult liveness_at_bci(int bci); |
| |
| // Get the interpreters viewpoint on oop liveness. MethodLiveness is |
| // conservative in the sense that it may consider locals to be live which |
| // cannot be live, like in the case where a local could contain an oop or |
| // a primitive along different paths. In that case the local must be |
| // dead when those paths merge. Since the interpreter's viewpoint is |
| // used when gc'ing an interpreter frame we need to use its viewpoint |
| // during OSR when loading the locals. |
| |
| BitMap live_local_oops_at_bci(int bci); |
| |
| #ifdef COMPILER1 |
| const BitMap bci_block_start(); |
| #endif |
| |
| ciTypeFlow* get_flow_analysis(); |
| ciTypeFlow* get_osr_flow_analysis(int osr_bci); // alternate entry point |
| ciCallProfile call_profile_at_bci(int bci); |
| int interpreter_call_site_count(int bci); |
| |
| // Given a certain calling environment, find the monomorphic target |
| // for the call. Return NULL if the call is not monomorphic in |
| // its calling environment. |
| ciMethod* find_monomorphic_target(ciInstanceKlass* caller, |
| ciInstanceKlass* callee_holder, |
| ciInstanceKlass* actual_receiver); |
| |
| // Given a known receiver klass, find the target for the call. |
| // Return NULL if the call has no target or is abstract. |
| ciMethod* resolve_invoke(ciKlass* caller, ciKlass* exact_receiver); |
| |
| // Find the proper vtable index to invoke this method. |
| int resolve_vtable_index(ciKlass* caller, ciKlass* receiver); |
| |
| // Compilation directives |
| bool will_link(ciKlass* accessing_klass, |
| ciKlass* declared_method_holder, |
| Bytecodes::Code bc); |
| bool should_exclude(); |
| bool should_inline(); |
| bool should_not_inline(); |
| bool should_print_assembly(); |
| bool break_at_execute(); |
| bool has_option(const char *option); |
| bool can_be_compiled(); |
| bool can_be_osr_compiled(int entry_bci); |
| void set_not_compilable(); |
| bool has_compiled_code(); |
| int instructions_size(); |
| void log_nmethod_identity(xmlStream* log); |
| bool is_not_reached(int bci); |
| bool was_executed_more_than(int times); |
| bool has_unloaded_classes_in_signature(); |
| bool is_klass_loaded(int refinfo_index, bool must_be_resolved) const; |
| bool check_call(int refinfo_index, bool is_static) const; |
| void build_method_data(); // make sure it exists in the VM also |
| int scale_count(int count, float prof_factor = 1.); // make MDO count commensurate with IIC |
| |
| // JSR 292 support |
| bool is_method_handle_invoke() const; |
| bool is_method_handle_adapter() const; |
| ciInstance* method_handle_type(); |
| |
| // What kind of ciObject is this? |
| bool is_method() { return true; } |
| |
| // Java access flags |
| bool is_public () const { return flags().is_public(); } |
| bool is_private () const { return flags().is_private(); } |
| bool is_protected () const { return flags().is_protected(); } |
| bool is_static () const { return flags().is_static(); } |
| bool is_final () const { return flags().is_final(); } |
| bool is_synchronized() const { return flags().is_synchronized(); } |
| bool is_native () const { return flags().is_native(); } |
| bool is_interface () const { return flags().is_interface(); } |
| bool is_abstract () const { return flags().is_abstract(); } |
| bool is_strict () const { return flags().is_strict(); } |
| |
| // Other flags |
| bool is_empty_method() const; |
| bool is_vanilla_constructor() const; |
| bool is_final_method() const { return is_final() || holder()->is_final(); } |
| bool has_loops () const; |
| bool has_jsrs () const; |
| bool is_accessor () const; |
| bool is_initializer () const; |
| bool can_be_statically_bound() const { return _can_be_statically_bound; } |
| |
| // Print the bytecodes of this method. |
| void print_codes_on(outputStream* st); |
| void print_codes() { |
| print_codes_on(tty); |
| } |
| void print_codes_on(int from, int to, outputStream* st); |
| |
| // Print the name of this method in various incarnations. |
| void print_name(outputStream* st = tty); |
| void print_short_name(outputStream* st = tty); |
| |
| methodOop get_method_handle_target() { |
| klassOop receiver_limit_oop = NULL; |
| int flags = 0; |
| return MethodHandles::decode_method(get_oop(), receiver_limit_oop, flags); |
| } |
| }; |
