/* * Copyright 1999-2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.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; 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(); MethodLivenessResult liveness_at_bci(int bci, bool raw = false); // 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 bool is_method_handle_invoke(); 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); };