Mercurial > hg > truffle
diff src/share/vm/ci/ciMethod.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
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children | e5b0439ef4ae |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/ci/ciMethod.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,246 @@ +/* + * Copyright 1999-2007 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); + + // 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 + + // 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); +};