1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/ci/ciMethod.hpp Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,246 @@
1.4 +/*
1.5 + * Copyright 1999-2007 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.24 + * have any questions.
1.25 + *
1.26 + */
1.27 +
1.28 +class ciMethodBlocks;
1.29 +class MethodLiveness;
1.30 +class BitMap;
1.31 +class Arena;
1.32 +class BCEscapeAnalyzer;
1.33 +
1.34 +
1.35 +// ciMethod
1.36 +//
1.37 +// This class represents a methodOop in the HotSpot virtual
1.38 +// machine.
1.39 +class ciMethod : public ciObject {
1.40 + friend class CompileBroker;
1.41 + CI_PACKAGE_ACCESS
1.42 + friend class ciEnv;
1.43 + friend class ciExceptionHandlerStream;
1.44 +
1.45 + private:
1.46 + // General method information.
1.47 + ciFlags _flags;
1.48 + ciSymbol* _name;
1.49 + ciInstanceKlass* _holder;
1.50 + ciSignature* _signature;
1.51 + ciMethodData* _method_data;
1.52 + BCEscapeAnalyzer* _bcea;
1.53 + ciMethodBlocks* _method_blocks;
1.54 +
1.55 + // Code attributes.
1.56 + int _code_size;
1.57 + int _max_stack;
1.58 + int _max_locals;
1.59 + vmIntrinsics::ID _intrinsic_id;
1.60 + int _handler_count;
1.61 + int _interpreter_invocation_count;
1.62 + int _interpreter_throwout_count;
1.63 +
1.64 + bool _uses_monitors;
1.65 + bool _balanced_monitors;
1.66 + bool _is_compilable;
1.67 + bool _can_be_statically_bound;
1.68 +
1.69 + // Lazy fields, filled in on demand
1.70 + address _code;
1.71 + ciExceptionHandler** _exception_handlers;
1.72 +
1.73 + // Optional liveness analyzer.
1.74 + MethodLiveness* _liveness;
1.75 +#ifdef COMPILER2
1.76 + ciTypeFlow* _flow;
1.77 +#endif
1.78 +
1.79 + ciMethod(methodHandle h_m);
1.80 + ciMethod(ciInstanceKlass* holder, ciSymbol* name, ciSymbol* signature);
1.81 +
1.82 + methodOop get_methodOop() const {
1.83 + methodOop m = (methodOop)get_oop();
1.84 + assert(m != NULL, "illegal use of unloaded method");
1.85 + return m;
1.86 + }
1.87 +
1.88 + oop loader() const { return _holder->loader(); }
1.89 +
1.90 + const char* type_string() { return "ciMethod"; }
1.91 +
1.92 + void print_impl(outputStream* st);
1.93 +
1.94 + void load_code();
1.95 +
1.96 + void check_is_loaded() const { assert(is_loaded(), "not loaded"); }
1.97 +
1.98 + void build_method_data(methodHandle h_m);
1.99 +
1.100 + void code_at_put(int bci, Bytecodes::Code code) {
1.101 + Bytecodes::check(code);
1.102 + assert(0 <= bci && bci < code_size(), "valid bci");
1.103 + address bcp = _code + bci;
1.104 + *bcp = code;
1.105 + }
1.106 +
1.107 + public:
1.108 + // Basic method information.
1.109 + ciFlags flags() const { check_is_loaded(); return _flags; }
1.110 + ciSymbol* name() const { return _name; }
1.111 + ciInstanceKlass* holder() const { return _holder; }
1.112 + ciMethodData* method_data();
1.113 +
1.114 + // Signature information.
1.115 + ciSignature* signature() const { return _signature; }
1.116 + ciType* return_type() const { return _signature->return_type(); }
1.117 + int arg_size_no_receiver() const { return _signature->size(); }
1.118 + int arg_size() const { return _signature->size() + (_flags.is_static() ? 0 : 1); }
1.119 +
1.120 + // Method code and related information.
1.121 + address code() { if (_code == NULL) load_code(); return _code; }
1.122 + int code_size() const { check_is_loaded(); return _code_size; }
1.123 + int max_stack() const { check_is_loaded(); return _max_stack; }
1.124 + int max_locals() const { check_is_loaded(); return _max_locals; }
1.125 + vmIntrinsics::ID intrinsic_id() const { check_is_loaded(); return _intrinsic_id; }
1.126 + bool has_exception_handlers() const { check_is_loaded(); return _handler_count > 0; }
1.127 + int exception_table_length() const { check_is_loaded(); return _handler_count; }
1.128 + int interpreter_invocation_count() const { check_is_loaded(); return _interpreter_invocation_count; }
1.129 + int interpreter_throwout_count() const { check_is_loaded(); return _interpreter_throwout_count; }
1.130 +
1.131 + Bytecodes::Code java_code_at_bci(int bci) {
1.132 + address bcp = code() + bci;
1.133 + return Bytecodes::java_code_at(bcp);
1.134 + }
1.135 + BCEscapeAnalyzer *get_bcea();
1.136 + ciMethodBlocks *get_method_blocks();
1.137 +
1.138 + bool has_linenumber_table() const; // length unknown until decompression
1.139 + u_char* compressed_linenumber_table() const; // not preserved by gc
1.140 +
1.141 + int line_number_from_bci(int bci) const;
1.142 +
1.143 + // Runtime information.
1.144 + int vtable_index();
1.145 + address native_entry();
1.146 + address interpreter_entry();
1.147 +
1.148 + // Analysis and profiling.
1.149 + //
1.150 + // Usage note: liveness_at_bci and init_vars should be wrapped in ResourceMarks.
1.151 + bool uses_monitors() const { return _uses_monitors; } // this one should go away, it has a misleading name
1.152 + bool has_monitor_bytecodes() const { return _uses_monitors; }
1.153 + bool has_balanced_monitors();
1.154 +
1.155 + MethodLivenessResult liveness_at_bci(int bci);
1.156 +
1.157 + // Get the interpreters viewpoint on oop liveness. MethodLiveness is
1.158 + // conservative in the sense that it may consider locals to be live which
1.159 + // cannot be live, like in the case where a local could contain an oop or
1.160 + // a primitive along different paths. In that case the local must be
1.161 + // dead when those paths merge. Since the interpreter's viewpoint is
1.162 + // used when gc'ing an interpreter frame we need to use its viewpoint
1.163 + // during OSR when loading the locals.
1.164 +
1.165 + BitMap live_local_oops_at_bci(int bci);
1.166 +
1.167 +#ifdef COMPILER1
1.168 + const BitMap bci_block_start();
1.169 +#endif
1.170 +
1.171 + ciTypeFlow* get_flow_analysis();
1.172 + ciTypeFlow* get_osr_flow_analysis(int osr_bci); // alternate entry point
1.173 + ciCallProfile call_profile_at_bci(int bci);
1.174 + int interpreter_call_site_count(int bci);
1.175 +
1.176 + // Given a certain calling environment, find the monomorphic target
1.177 + // for the call. Return NULL if the call is not monomorphic in
1.178 + // its calling environment.
1.179 + ciMethod* find_monomorphic_target(ciInstanceKlass* caller,
1.180 + ciInstanceKlass* callee_holder,
1.181 + ciInstanceKlass* actual_receiver);
1.182 +
1.183 + // Given a known receiver klass, find the target for the call.
1.184 + // Return NULL if the call has no target or is abstract.
1.185 + ciMethod* resolve_invoke(ciKlass* caller, ciKlass* exact_receiver);
1.186 +
1.187 + // Find the proper vtable index to invoke this method.
1.188 + int resolve_vtable_index(ciKlass* caller, ciKlass* receiver);
1.189 +
1.190 + // Compilation directives
1.191 + bool will_link(ciKlass* accessing_klass,
1.192 + ciKlass* declared_method_holder,
1.193 + Bytecodes::Code bc);
1.194 + bool should_exclude();
1.195 + bool should_inline();
1.196 + bool should_not_inline();
1.197 + bool should_print_assembly();
1.198 + bool break_at_execute();
1.199 + bool has_option(const char *option);
1.200 + bool can_be_compiled();
1.201 + bool can_be_osr_compiled(int entry_bci);
1.202 + void set_not_compilable();
1.203 + bool has_compiled_code();
1.204 + int instructions_size();
1.205 + void log_nmethod_identity(xmlStream* log);
1.206 + bool is_not_reached(int bci);
1.207 + bool was_executed_more_than(int times);
1.208 + bool has_unloaded_classes_in_signature();
1.209 + bool is_klass_loaded(int refinfo_index, bool must_be_resolved) const;
1.210 + bool check_call(int refinfo_index, bool is_static) const;
1.211 + void build_method_data(); // make sure it exists in the VM also
1.212 + int scale_count(int count, float prof_factor = 1.); // make MDO count commensurate with IIC
1.213 +
1.214 + // What kind of ciObject is this?
1.215 + bool is_method() { return true; }
1.216 +
1.217 + // Java access flags
1.218 + bool is_public () const { return flags().is_public(); }
1.219 + bool is_private () const { return flags().is_private(); }
1.220 + bool is_protected () const { return flags().is_protected(); }
1.221 + bool is_static () const { return flags().is_static(); }
1.222 + bool is_final () const { return flags().is_final(); }
1.223 + bool is_synchronized() const { return flags().is_synchronized(); }
1.224 + bool is_native () const { return flags().is_native(); }
1.225 + bool is_interface () const { return flags().is_interface(); }
1.226 + bool is_abstract () const { return flags().is_abstract(); }
1.227 + bool is_strict () const { return flags().is_strict(); }
1.228 +
1.229 + // Other flags
1.230 + bool is_empty_method() const;
1.231 + bool is_vanilla_constructor() const;
1.232 + bool is_final_method() const { return is_final() || holder()->is_final(); }
1.233 + bool has_loops () const;
1.234 + bool has_jsrs () const;
1.235 + bool is_accessor () const;
1.236 + bool is_initializer () const;
1.237 + bool can_be_statically_bound() const { return _can_be_statically_bound; }
1.238 +
1.239 + // Print the bytecodes of this method.
1.240 + void print_codes_on(outputStream* st);
1.241 + void print_codes() {
1.242 + print_codes_on(tty);
1.243 + }
1.244 + void print_codes_on(int from, int to, outputStream* st);
1.245 +
1.246 + // Print the name of this method in various incarnations.
1.247 + void print_name(outputStream* st = tty);
1.248 + void print_short_name(outputStream* st = tty);
1.249 +};
