360 lines
14 KiB
C++
360 lines
14 KiB
C++
/*
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* Copyright 1999-2007 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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class CompileTask;
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// ciEnv
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//
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// This class is the top level broker for requests from the compiler
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// to the VM.
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class ciEnv : StackObj {
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CI_PACKAGE_ACCESS_TO
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friend class CompileBroker;
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friend class Dependencies; // for get_object, during logging
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private:
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Arena* _arena; // Alias for _ciEnv_arena except in init_shared_objects()
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Arena _ciEnv_arena;
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int _system_dictionary_modification_counter;
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ciObjectFactory* _factory;
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OopRecorder* _oop_recorder;
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DebugInformationRecorder* _debug_info;
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Dependencies* _dependencies;
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const char* _failure_reason;
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int _compilable;
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bool _break_at_compile;
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int _num_inlined_bytecodes;
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CompileTask* _task; // faster access to CompilerThread::task
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CompileLog* _log; // faster access to CompilerThread::log
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void* _compiler_data; // compiler-specific stuff, if any
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char* _name_buffer;
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int _name_buffer_len;
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// Distinguished instances of certain ciObjects..
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static ciObject* _null_object_instance;
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static ciMethodKlass* _method_klass_instance;
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static ciSymbolKlass* _symbol_klass_instance;
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static ciKlassKlass* _klass_klass_instance;
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static ciInstanceKlassKlass* _instance_klass_klass_instance;
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static ciTypeArrayKlassKlass* _type_array_klass_klass_instance;
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static ciObjArrayKlassKlass* _obj_array_klass_klass_instance;
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static ciInstanceKlass* _ArrayStoreException;
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static ciInstanceKlass* _Class;
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static ciInstanceKlass* _ClassCastException;
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static ciInstanceKlass* _Object;
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static ciInstanceKlass* _Throwable;
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static ciInstanceKlass* _Thread;
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static ciInstanceKlass* _OutOfMemoryError;
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static ciInstanceKlass* _String;
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static ciSymbol* _unloaded_cisymbol;
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static ciInstanceKlass* _unloaded_ciinstance_klass;
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static ciObjArrayKlass* _unloaded_ciobjarrayklass;
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static jobject _ArrayIndexOutOfBoundsException_handle;
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static jobject _ArrayStoreException_handle;
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static jobject _ClassCastException_handle;
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ciInstance* _NullPointerException_instance;
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ciInstance* _ArithmeticException_instance;
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ciInstance* _ArrayIndexOutOfBoundsException_instance;
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ciInstance* _ArrayStoreException_instance;
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ciInstance* _ClassCastException_instance;
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// Look up a klass by name from a particular class loader (the accessor's).
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// If require_local, result must be defined in that class loader, or NULL.
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// If !require_local, a result from remote class loader may be reported,
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// if sufficient class loader constraints exist such that initiating
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// a class loading request from the given loader is bound to return
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// the class defined in the remote loader (or throw an error).
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//
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// Return an unloaded klass if !require_local and no class at all is found.
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//
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// The CI treats a klass as loaded if it is consistently defined in
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// another loader, even if it hasn't yet been loaded in all loaders
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// that could potentially see it via delegation.
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ciKlass* get_klass_by_name(ciKlass* accessing_klass,
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ciSymbol* klass_name,
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bool require_local);
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// Constant pool access.
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ciKlass* get_klass_by_index(ciInstanceKlass* loading_klass,
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int klass_index,
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bool& is_accessible);
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ciConstant get_constant_by_index(ciInstanceKlass* loading_klass,
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int constant_index);
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bool is_unresolved_string(ciInstanceKlass* loading_klass,
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int constant_index) const;
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bool is_unresolved_klass(ciInstanceKlass* loading_klass,
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int constant_index) const;
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ciField* get_field_by_index(ciInstanceKlass* loading_klass,
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int field_index);
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ciMethod* get_method_by_index(ciInstanceKlass* loading_klass,
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int method_index, Bytecodes::Code bc);
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// Implementation methods for loading and constant pool access.
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ciKlass* get_klass_by_name_impl(ciKlass* accessing_klass,
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ciSymbol* klass_name,
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bool require_local);
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ciKlass* get_klass_by_index_impl(ciInstanceKlass* loading_klass,
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int klass_index,
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bool& is_accessible);
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ciConstant get_constant_by_index_impl(ciInstanceKlass* loading_klass,
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int constant_index);
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bool is_unresolved_string_impl (instanceKlass* loading_klass,
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int constant_index) const;
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bool is_unresolved_klass_impl (instanceKlass* loading_klass,
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int constant_index) const;
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ciField* get_field_by_index_impl(ciInstanceKlass* loading_klass,
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int field_index);
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ciMethod* get_method_by_index_impl(ciInstanceKlass* loading_klass,
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int method_index, Bytecodes::Code bc);
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// Helper methods
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bool check_klass_accessibility(ciKlass* accessing_klass,
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klassOop resolved_klassOop);
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methodOop lookup_method(instanceKlass* accessor,
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instanceKlass* holder,
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symbolOop name,
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symbolOop sig,
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Bytecodes::Code bc);
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// Get a ciObject from the object factory. Ensures uniqueness
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// of ciObjects.
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ciObject* get_object(oop o) {
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if (o == NULL) {
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return _null_object_instance;
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} else {
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return _factory->get(o);
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}
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}
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ciMethod* get_method_from_handle(jobject method);
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ciInstance* get_or_create_exception(jobject& handle, symbolHandle name);
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// Get a ciMethod representing either an unfound method or
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// a method with an unloaded holder. Ensures uniqueness of
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// the result.
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ciMethod* get_unloaded_method(ciInstanceKlass* holder,
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ciSymbol* name,
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ciSymbol* signature) {
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return _factory->get_unloaded_method(holder, name, signature);
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}
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// Get a ciKlass representing an unloaded klass.
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// Ensures uniqueness of the result.
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ciKlass* get_unloaded_klass(ciKlass* accessing_klass,
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ciSymbol* name) {
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return _factory->get_unloaded_klass(accessing_klass, name, true);
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}
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// See if we already have an unloaded klass for the given name
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// or return NULL if not.
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ciKlass *check_get_unloaded_klass(ciKlass* accessing_klass, ciSymbol* name) {
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return _factory->get_unloaded_klass(accessing_klass, name, false);
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}
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// Get a ciReturnAddress corresponding to the given bci.
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// Ensures uniqueness of the result.
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ciReturnAddress* get_return_address(int bci) {
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return _factory->get_return_address(bci);
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}
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// Get a ciMethodData representing the methodData for a method
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// with none.
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ciMethodData* get_empty_methodData() {
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return _factory->get_empty_methodData();
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}
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// General utility : get a buffer of some required length.
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// Used in symbol creation.
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char* name_buffer(int req_len);
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// Is this thread currently in the VM state?
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static bool is_in_vm();
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// Helper routine for determining the validity of a compilation
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// with respect to concurrent class loading.
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void check_for_system_dictionary_modification(ciMethod* target);
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public:
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enum {
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MethodCompilable,
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MethodCompilable_not_at_tier,
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MethodCompilable_never
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};
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ciEnv(CompileTask* task, int system_dictionary_modification_counter);
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// Used only during initialization of the ci
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ciEnv(Arena* arena);
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~ciEnv();
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OopRecorder* oop_recorder() { return _oop_recorder; }
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void set_oop_recorder(OopRecorder* r) { _oop_recorder = r; }
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DebugInformationRecorder* debug_info() { return _debug_info; }
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void set_debug_info(DebugInformationRecorder* i) { _debug_info = i; }
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Dependencies* dependencies() { return _dependencies; }
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void set_dependencies(Dependencies* d) { _dependencies = d; }
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// This is true if the compilation is not going to produce code.
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// (It is reasonable to retry failed compilations.)
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bool failing() { return _failure_reason != NULL; }
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// Reason this compilation is failing, such as "too many basic blocks".
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const char* failure_reason() { return _failure_reason; }
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// Return state of appropriate compilability
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int compilable() { return _compilable; }
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bool break_at_compile() { return _break_at_compile; }
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void set_break_at_compile(bool z) { _break_at_compile = z; }
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// The compiler task which has created this env.
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// May be useful to find out compile_id, comp_level, etc.
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CompileTask* task() { return _task; }
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// Handy forwards to the task:
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int comp_level(); // task()->comp_level()
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uint compile_id(); // task()->compile_id()
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// Register the result of a compilation.
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void register_method(ciMethod* target,
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int entry_bci,
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CodeOffsets* offsets,
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int orig_pc_offset,
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CodeBuffer* code_buffer,
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int frame_words,
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OopMapSet* oop_map_set,
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ExceptionHandlerTable* handler_table,
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ImplicitExceptionTable* inc_table,
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AbstractCompiler* compiler,
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int comp_level,
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bool has_debug_info = true,
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bool has_unsafe_access = false);
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// Access to certain well known ciObjects.
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ciInstanceKlass* ArrayStoreException_klass() {
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return _ArrayStoreException;
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}
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ciInstanceKlass* Class_klass() {
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return _Class;
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}
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ciInstanceKlass* ClassCastException_klass() {
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return _ClassCastException;
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}
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ciInstanceKlass* Object_klass() {
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return _Object;
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}
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ciInstanceKlass* Throwable_klass() {
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return _Throwable;
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}
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ciInstanceKlass* Thread_klass() {
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return _Thread;
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}
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ciInstanceKlass* OutOfMemoryError_klass() {
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return _OutOfMemoryError;
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}
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ciInstanceKlass* String_klass() {
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return _String;
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}
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ciInstance* NullPointerException_instance() {
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assert(_NullPointerException_instance != NULL, "initialization problem");
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return _NullPointerException_instance;
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}
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ciInstance* ArithmeticException_instance() {
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assert(_ArithmeticException_instance != NULL, "initialization problem");
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return _ArithmeticException_instance;
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}
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// Lazy constructors:
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ciInstance* ArrayIndexOutOfBoundsException_instance();
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ciInstance* ArrayStoreException_instance();
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ciInstance* ClassCastException_instance();
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static ciSymbol* unloaded_cisymbol() {
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return _unloaded_cisymbol;
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}
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static ciObjArrayKlass* unloaded_ciobjarrayklass() {
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return _unloaded_ciobjarrayklass;
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}
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static ciInstanceKlass* unloaded_ciinstance_klass() {
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return _unloaded_ciinstance_klass;
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}
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ciKlass* find_system_klass(ciSymbol* klass_name);
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// Note: To find a class from its name string, use ciSymbol::make,
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// but consider adding to vmSymbols.hpp instead.
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// Use this to make a holder for non-perm compile time constants.
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// The resulting array is guaranteed to satisfy "has_encoding".
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ciArray* make_array(GrowableArray<ciObject*>* objects);
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// converts the ciKlass* representing the holder of a method into a
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// ciInstanceKlass*. This is needed since the holder of a method in
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// the bytecodes could be an array type. Basically this converts
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// array types into java/lang/Object and other types stay as they are.
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static ciInstanceKlass* get_instance_klass_for_declared_method_holder(ciKlass* klass);
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// Return the machine-level offset of o, which must be an element of a.
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// This may be used to form constant-loading expressions in lieu of simpler encodings.
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int array_element_offset_in_bytes(ciArray* a, ciObject* o);
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// Access to the compile-lifetime allocation arena.
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Arena* arena() { return _arena; }
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// What is the current compilation environment?
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static ciEnv* current() { return CompilerThread::current()->env(); }
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// Overload with current thread argument
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static ciEnv* current(CompilerThread *thread) { return thread->env(); }
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// Per-compiler data. (Used by C2 to publish the Compile* pointer.)
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void* compiler_data() { return _compiler_data; }
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void set_compiler_data(void* x) { _compiler_data = x; }
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// Notice that a method has been inlined in the current compile;
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// used only for statistics.
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void notice_inlined_method(ciMethod* method);
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// Total number of bytecodes in inlined methods in this compile
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int num_inlined_bytecodes() const;
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// Output stream for logging compilation info.
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CompileLog* log() { return _log; }
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void set_log(CompileLog* log) { _log = log; }
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// Check for changes to the system dictionary during compilation
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bool system_dictionary_modification_counter_changed();
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void record_failure(const char* reason);
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void record_method_not_compilable(const char* reason, bool all_tiers = true);
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void record_out_of_memory_failure();
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};
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