diff -r fd16c54261b3 -r 489c9b5090e2 hotspot/src/share/vm/ci/ciEnv.hpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/hotspot/src/share/vm/ci/ciEnv.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,359 @@ +/* + * 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 CompileTask; + +// ciEnv +// +// This class is the top level broker for requests from the compiler +// to the VM. +class ciEnv : StackObj { + CI_PACKAGE_ACCESS_TO + + friend class CompileBroker; + friend class Dependencies; // for get_object, during logging + +private: + Arena* _arena; // Alias for _ciEnv_arena except in init_shared_objects() + Arena _ciEnv_arena; + int _system_dictionary_modification_counter; + ciObjectFactory* _factory; + OopRecorder* _oop_recorder; + DebugInformationRecorder* _debug_info; + Dependencies* _dependencies; + const char* _failure_reason; + int _compilable; + bool _break_at_compile; + int _num_inlined_bytecodes; + CompileTask* _task; // faster access to CompilerThread::task + CompileLog* _log; // faster access to CompilerThread::log + void* _compiler_data; // compiler-specific stuff, if any + + char* _name_buffer; + int _name_buffer_len; + + // Distinguished instances of certain ciObjects.. + static ciObject* _null_object_instance; + static ciMethodKlass* _method_klass_instance; + static ciSymbolKlass* _symbol_klass_instance; + static ciKlassKlass* _klass_klass_instance; + static ciInstanceKlassKlass* _instance_klass_klass_instance; + static ciTypeArrayKlassKlass* _type_array_klass_klass_instance; + static ciObjArrayKlassKlass* _obj_array_klass_klass_instance; + + static ciInstanceKlass* _ArrayStoreException; + static ciInstanceKlass* _Class; + static ciInstanceKlass* _ClassCastException; + static ciInstanceKlass* _Object; + static ciInstanceKlass* _Throwable; + static ciInstanceKlass* _Thread; + static ciInstanceKlass* _OutOfMemoryError; + static ciInstanceKlass* _String; + + static ciSymbol* _unloaded_cisymbol; + static ciInstanceKlass* _unloaded_ciinstance_klass; + static ciObjArrayKlass* _unloaded_ciobjarrayklass; + + static jobject _ArrayIndexOutOfBoundsException_handle; + static jobject _ArrayStoreException_handle; + static jobject _ClassCastException_handle; + + ciInstance* _NullPointerException_instance; + ciInstance* _ArithmeticException_instance; + ciInstance* _ArrayIndexOutOfBoundsException_instance; + ciInstance* _ArrayStoreException_instance; + ciInstance* _ClassCastException_instance; + + // Look up a klass by name from a particular class loader (the accessor's). + // If require_local, result must be defined in that class loader, or NULL. + // If !require_local, a result from remote class loader may be reported, + // if sufficient class loader constraints exist such that initiating + // a class loading request from the given loader is bound to return + // the class defined in the remote loader (or throw an error). + // + // Return an unloaded klass if !require_local and no class at all is found. + // + // The CI treats a klass as loaded if it is consistently defined in + // another loader, even if it hasn't yet been loaded in all loaders + // that could potentially see it via delegation. + ciKlass* get_klass_by_name(ciKlass* accessing_klass, + ciSymbol* klass_name, + bool require_local); + + // Constant pool access. + ciKlass* get_klass_by_index(ciInstanceKlass* loading_klass, + int klass_index, + bool& is_accessible); + ciConstant get_constant_by_index(ciInstanceKlass* loading_klass, + int constant_index); + bool is_unresolved_string(ciInstanceKlass* loading_klass, + int constant_index) const; + bool is_unresolved_klass(ciInstanceKlass* loading_klass, + int constant_index) const; + ciField* get_field_by_index(ciInstanceKlass* loading_klass, + int field_index); + ciMethod* get_method_by_index(ciInstanceKlass* loading_klass, + int method_index, Bytecodes::Code bc); + + // Implementation methods for loading and constant pool access. + ciKlass* get_klass_by_name_impl(ciKlass* accessing_klass, + ciSymbol* klass_name, + bool require_local); + ciKlass* get_klass_by_index_impl(ciInstanceKlass* loading_klass, + int klass_index, + bool& is_accessible); + ciConstant get_constant_by_index_impl(ciInstanceKlass* loading_klass, + int constant_index); + bool is_unresolved_string_impl (instanceKlass* loading_klass, + int constant_index) const; + bool is_unresolved_klass_impl (instanceKlass* loading_klass, + int constant_index) const; + ciField* get_field_by_index_impl(ciInstanceKlass* loading_klass, + int field_index); + ciMethod* get_method_by_index_impl(ciInstanceKlass* loading_klass, + int method_index, Bytecodes::Code bc); + + // Helper methods + bool check_klass_accessibility(ciKlass* accessing_klass, + klassOop resolved_klassOop); + methodOop lookup_method(instanceKlass* accessor, + instanceKlass* holder, + symbolOop name, + symbolOop sig, + Bytecodes::Code bc); + + // Get a ciObject from the object factory. Ensures uniqueness + // of ciObjects. + ciObject* get_object(oop o) { + if (o == NULL) { + return _null_object_instance; + } else { + return _factory->get(o); + } + } + + ciMethod* get_method_from_handle(jobject method); + + ciInstance* get_or_create_exception(jobject& handle, symbolHandle name); + + // Get a ciMethod representing either an unfound method or + // a method with an unloaded holder. Ensures uniqueness of + // the result. + ciMethod* get_unloaded_method(ciInstanceKlass* holder, + ciSymbol* name, + ciSymbol* signature) { + return _factory->get_unloaded_method(holder, name, signature); + } + + // Get a ciKlass representing an unloaded klass. + // Ensures uniqueness of the result. + ciKlass* get_unloaded_klass(ciKlass* accessing_klass, + ciSymbol* name) { + return _factory->get_unloaded_klass(accessing_klass, name, true); + } + + // See if we already have an unloaded klass for the given name + // or return NULL if not. + ciKlass *check_get_unloaded_klass(ciKlass* accessing_klass, ciSymbol* name) { + return _factory->get_unloaded_klass(accessing_klass, name, false); + } + + // Get a ciReturnAddress corresponding to the given bci. + // Ensures uniqueness of the result. + ciReturnAddress* get_return_address(int bci) { + return _factory->get_return_address(bci); + } + + // Get a ciMethodData representing the methodData for a method + // with none. + ciMethodData* get_empty_methodData() { + return _factory->get_empty_methodData(); + } + + // General utility : get a buffer of some required length. + // Used in symbol creation. + char* name_buffer(int req_len); + + // Is this thread currently in the VM state? + static bool is_in_vm(); + + // Helper routine for determining the validity of a compilation + // with respect to concurrent class loading. + void check_for_system_dictionary_modification(ciMethod* target); + +public: + enum { + MethodCompilable, + MethodCompilable_not_at_tier, + MethodCompilable_never + }; + + ciEnv(CompileTask* task, int system_dictionary_modification_counter); + // Used only during initialization of the ci + ciEnv(Arena* arena); + ~ciEnv(); + + OopRecorder* oop_recorder() { return _oop_recorder; } + void set_oop_recorder(OopRecorder* r) { _oop_recorder = r; } + + DebugInformationRecorder* debug_info() { return _debug_info; } + void set_debug_info(DebugInformationRecorder* i) { _debug_info = i; } + + Dependencies* dependencies() { return _dependencies; } + void set_dependencies(Dependencies* d) { _dependencies = d; } + + // This is true if the compilation is not going to produce code. + // (It is reasonable to retry failed compilations.) + bool failing() { return _failure_reason != NULL; } + + // Reason this compilation is failing, such as "too many basic blocks". + const char* failure_reason() { return _failure_reason; } + + // Return state of appropriate compilability + int compilable() { return _compilable; } + + bool break_at_compile() { return _break_at_compile; } + void set_break_at_compile(bool z) { _break_at_compile = z; } + + // The compiler task which has created this env. + // May be useful to find out compile_id, comp_level, etc. + CompileTask* task() { return _task; } + // Handy forwards to the task: + int comp_level(); // task()->comp_level() + uint compile_id(); // task()->compile_id() + + // Register the result of a compilation. + void register_method(ciMethod* target, + int entry_bci, + CodeOffsets* offsets, + int orig_pc_offset, + CodeBuffer* code_buffer, + int frame_words, + OopMapSet* oop_map_set, + ExceptionHandlerTable* handler_table, + ImplicitExceptionTable* inc_table, + AbstractCompiler* compiler, + int comp_level, + bool has_debug_info = true, + bool has_unsafe_access = false); + + + // Access to certain well known ciObjects. + ciInstanceKlass* ArrayStoreException_klass() { + return _ArrayStoreException; + } + ciInstanceKlass* Class_klass() { + return _Class; + } + ciInstanceKlass* ClassCastException_klass() { + return _ClassCastException; + } + ciInstanceKlass* Object_klass() { + return _Object; + } + ciInstanceKlass* Throwable_klass() { + return _Throwable; + } + ciInstanceKlass* Thread_klass() { + return _Thread; + } + ciInstanceKlass* OutOfMemoryError_klass() { + return _OutOfMemoryError; + } + ciInstanceKlass* String_klass() { + return _String; + } + ciInstance* NullPointerException_instance() { + assert(_NullPointerException_instance != NULL, "initialization problem"); + return _NullPointerException_instance; + } + ciInstance* ArithmeticException_instance() { + assert(_ArithmeticException_instance != NULL, "initialization problem"); + return _ArithmeticException_instance; + } + + // Lazy constructors: + ciInstance* ArrayIndexOutOfBoundsException_instance(); + ciInstance* ArrayStoreException_instance(); + ciInstance* ClassCastException_instance(); + + static ciSymbol* unloaded_cisymbol() { + return _unloaded_cisymbol; + } + static ciObjArrayKlass* unloaded_ciobjarrayklass() { + return _unloaded_ciobjarrayklass; + } + static ciInstanceKlass* unloaded_ciinstance_klass() { + return _unloaded_ciinstance_klass; + } + + ciKlass* find_system_klass(ciSymbol* klass_name); + // Note: To find a class from its name string, use ciSymbol::make, + // but consider adding to vmSymbols.hpp instead. + + // Use this to make a holder for non-perm compile time constants. + // The resulting array is guaranteed to satisfy "has_encoding". + ciArray* make_array(GrowableArray* objects); + + // converts the ciKlass* representing the holder of a method into a + // ciInstanceKlass*. This is needed since the holder of a method in + // the bytecodes could be an array type. Basically this converts + // array types into java/lang/Object and other types stay as they are. + static ciInstanceKlass* get_instance_klass_for_declared_method_holder(ciKlass* klass); + + // Return the machine-level offset of o, which must be an element of a. + // This may be used to form constant-loading expressions in lieu of simpler encodings. + int array_element_offset_in_bytes(ciArray* a, ciObject* o); + + // Access to the compile-lifetime allocation arena. + Arena* arena() { return _arena; } + + // What is the current compilation environment? + static ciEnv* current() { return CompilerThread::current()->env(); } + + // Overload with current thread argument + static ciEnv* current(CompilerThread *thread) { return thread->env(); } + + // Per-compiler data. (Used by C2 to publish the Compile* pointer.) + void* compiler_data() { return _compiler_data; } + void set_compiler_data(void* x) { _compiler_data = x; } + + // Notice that a method has been inlined in the current compile; + // used only for statistics. + void notice_inlined_method(ciMethod* method); + + // Total number of bytecodes in inlined methods in this compile + int num_inlined_bytecodes() const; + + // Output stream for logging compilation info. + CompileLog* log() { return _log; } + void set_log(CompileLog* log) { _log = log; } + + // Check for changes to the system dictionary during compilation + bool system_dictionary_modification_counter_changed(); + + void record_failure(const char* reason); + void record_method_not_compilable(const char* reason, bool all_tiers = true); + void record_out_of_memory_failure(); +};