| /* |
| * 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. |
| * |
| */ |
| |
| #include "incls/_precompiled.incl" |
| #include "incls/_ciEnv.cpp.incl" |
| |
| // ciEnv |
| // |
| // This class is the top level broker for requests from the compiler |
| // to the VM. |
| |
| ciObject* ciEnv::_null_object_instance; |
| ciMethodKlass* ciEnv::_method_klass_instance; |
| ciSymbolKlass* ciEnv::_symbol_klass_instance; |
| ciKlassKlass* ciEnv::_klass_klass_instance; |
| ciInstanceKlassKlass* ciEnv::_instance_klass_klass_instance; |
| ciTypeArrayKlassKlass* ciEnv::_type_array_klass_klass_instance; |
| ciObjArrayKlassKlass* ciEnv::_obj_array_klass_klass_instance; |
| |
| ciInstanceKlass* ciEnv::_ArrayStoreException; |
| ciInstanceKlass* ciEnv::_Class; |
| ciInstanceKlass* ciEnv::_ClassCastException; |
| ciInstanceKlass* ciEnv::_Object; |
| ciInstanceKlass* ciEnv::_Throwable; |
| ciInstanceKlass* ciEnv::_Thread; |
| ciInstanceKlass* ciEnv::_OutOfMemoryError; |
| ciInstanceKlass* ciEnv::_String; |
| |
| ciSymbol* ciEnv::_unloaded_cisymbol = NULL; |
| ciInstanceKlass* ciEnv::_unloaded_ciinstance_klass = NULL; |
| ciObjArrayKlass* ciEnv::_unloaded_ciobjarrayklass = NULL; |
| |
| jobject ciEnv::_ArrayIndexOutOfBoundsException_handle = NULL; |
| jobject ciEnv::_ArrayStoreException_handle = NULL; |
| jobject ciEnv::_ClassCastException_handle = NULL; |
| |
| #ifndef PRODUCT |
| static bool firstEnv = true; |
| #endif /* PRODUCT */ |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::ciEnv |
| ciEnv::ciEnv(CompileTask* task, int system_dictionary_modification_counter) { |
| VM_ENTRY_MARK; |
| |
| // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc. |
| thread->set_env(this); |
| assert(ciEnv::current() == this, "sanity"); |
| |
| _oop_recorder = NULL; |
| _debug_info = NULL; |
| _dependencies = NULL; |
| _failure_reason = NULL; |
| _compilable = MethodCompilable; |
| _break_at_compile = false; |
| _compiler_data = NULL; |
| #ifndef PRODUCT |
| assert(!firstEnv, "not initialized properly"); |
| #endif /* !PRODUCT */ |
| |
| _system_dictionary_modification_counter = system_dictionary_modification_counter; |
| _num_inlined_bytecodes = 0; |
| assert(task == NULL || thread->task() == task, "sanity"); |
| _task = task; |
| _log = NULL; |
| |
| // Temporary buffer for creating symbols and such. |
| _name_buffer = NULL; |
| _name_buffer_len = 0; |
| |
| _arena = &_ciEnv_arena; |
| _factory = new (_arena) ciObjectFactory(_arena, 128); |
| |
| // Preload commonly referenced system ciObjects. |
| |
| // During VM initialization, these instances have not yet been created. |
| // Assertions ensure that these instances are not accessed before |
| // their initialization. |
| |
| assert(Universe::is_fully_initialized(), "should be complete"); |
| |
| oop o = Universe::null_ptr_exception_instance(); |
| assert(o != NULL, "should have been initialized"); |
| _NullPointerException_instance = get_object(o)->as_instance(); |
| o = Universe::arithmetic_exception_instance(); |
| assert(o != NULL, "should have been initialized"); |
| _ArithmeticException_instance = get_object(o)->as_instance(); |
| |
| _ArrayIndexOutOfBoundsException_instance = NULL; |
| _ArrayStoreException_instance = NULL; |
| _ClassCastException_instance = NULL; |
| } |
| |
| ciEnv::ciEnv(Arena* arena) { |
| ASSERT_IN_VM; |
| |
| // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc. |
| CompilerThread* current_thread = CompilerThread::current(); |
| assert(current_thread->env() == NULL, "must be"); |
| current_thread->set_env(this); |
| assert(ciEnv::current() == this, "sanity"); |
| |
| _oop_recorder = NULL; |
| _debug_info = NULL; |
| _dependencies = NULL; |
| _failure_reason = NULL; |
| _compilable = MethodCompilable_never; |
| _break_at_compile = false; |
| _compiler_data = NULL; |
| #ifndef PRODUCT |
| assert(firstEnv, "must be first"); |
| firstEnv = false; |
| #endif /* !PRODUCT */ |
| |
| _system_dictionary_modification_counter = 0; |
| _num_inlined_bytecodes = 0; |
| _task = NULL; |
| _log = NULL; |
| |
| // Temporary buffer for creating symbols and such. |
| _name_buffer = NULL; |
| _name_buffer_len = 0; |
| |
| _arena = arena; |
| _factory = new (_arena) ciObjectFactory(_arena, 128); |
| |
| // Preload commonly referenced system ciObjects. |
| |
| // During VM initialization, these instances have not yet been created. |
| // Assertions ensure that these instances are not accessed before |
| // their initialization. |
| |
| assert(Universe::is_fully_initialized(), "must be"); |
| |
| oop o = Universe::null_ptr_exception_instance(); |
| assert(o != NULL, "should have been initialized"); |
| _NullPointerException_instance = get_object(o)->as_instance(); |
| o = Universe::arithmetic_exception_instance(); |
| assert(o != NULL, "should have been initialized"); |
| _ArithmeticException_instance = get_object(o)->as_instance(); |
| |
| _ArrayIndexOutOfBoundsException_instance = NULL; |
| _ArrayStoreException_instance = NULL; |
| _ClassCastException_instance = NULL; |
| } |
| |
| ciEnv::~ciEnv() { |
| CompilerThread* current_thread = CompilerThread::current(); |
| current_thread->set_env(NULL); |
| } |
| |
| // ------------------------------------------------------------------ |
| // helper for lazy exception creation |
| ciInstance* ciEnv::get_or_create_exception(jobject& handle, symbolHandle name) { |
| VM_ENTRY_MARK; |
| if (handle == NULL) { |
| // Cf. universe.cpp, creation of Universe::_null_ptr_exception_instance. |
| klassOop k = SystemDictionary::find(name, Handle(), Handle(), THREAD); |
| jobject objh = NULL; |
| if (!HAS_PENDING_EXCEPTION && k != NULL) { |
| oop obj = instanceKlass::cast(k)->allocate_permanent_instance(THREAD); |
| if (!HAS_PENDING_EXCEPTION) |
| objh = JNIHandles::make_global(obj); |
| } |
| if (HAS_PENDING_EXCEPTION) { |
| CLEAR_PENDING_EXCEPTION; |
| } else { |
| handle = objh; |
| } |
| } |
| oop obj = JNIHandles::resolve(handle); |
| return obj == NULL? NULL: get_object(obj)->as_instance(); |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::ArrayIndexOutOfBoundsException_instance, etc. |
| ciInstance* ciEnv::ArrayIndexOutOfBoundsException_instance() { |
| if (_ArrayIndexOutOfBoundsException_instance == NULL) { |
| _ArrayIndexOutOfBoundsException_instance |
| = get_or_create_exception(_ArrayIndexOutOfBoundsException_handle, |
| vmSymbolHandles::java_lang_ArrayIndexOutOfBoundsException()); |
| } |
| return _ArrayIndexOutOfBoundsException_instance; |
| } |
| ciInstance* ciEnv::ArrayStoreException_instance() { |
| if (_ArrayStoreException_instance == NULL) { |
| _ArrayStoreException_instance |
| = get_or_create_exception(_ArrayStoreException_handle, |
| vmSymbolHandles::java_lang_ArrayStoreException()); |
| } |
| return _ArrayStoreException_instance; |
| } |
| ciInstance* ciEnv::ClassCastException_instance() { |
| if (_ClassCastException_instance == NULL) { |
| _ClassCastException_instance |
| = get_or_create_exception(_ClassCastException_handle, |
| vmSymbolHandles::java_lang_ClassCastException()); |
| } |
| return _ClassCastException_instance; |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::get_method_from_handle |
| ciMethod* ciEnv::get_method_from_handle(jobject method) { |
| VM_ENTRY_MARK; |
| return get_object(JNIHandles::resolve(method))->as_method(); |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::make_array |
| ciArray* ciEnv::make_array(GrowableArray<ciObject*>* objects) { |
| VM_ENTRY_MARK; |
| int length = objects->length(); |
| objArrayOop a = oopFactory::new_system_objArray(length, THREAD); |
| if (HAS_PENDING_EXCEPTION) { |
| CLEAR_PENDING_EXCEPTION; |
| record_out_of_memory_failure(); |
| return NULL; |
| } |
| for (int i = 0; i < length; i++) { |
| a->obj_at_put(i, objects->at(i)->get_oop()); |
| } |
| assert(a->is_perm(), ""); |
| return get_object(a)->as_array(); |
| } |
| |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::array_element_offset_in_bytes |
| int ciEnv::array_element_offset_in_bytes(ciArray* a_h, ciObject* o_h) { |
| VM_ENTRY_MARK; |
| objArrayOop a = (objArrayOop)a_h->get_oop(); |
| assert(a->is_objArray(), ""); |
| int length = a->length(); |
| oop o = o_h->get_oop(); |
| for (int i = 0; i < length; i++) { |
| if (a->obj_at(i) == o) return i; |
| } |
| return -1; |
| } |
| |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::check_klass_accessiblity |
| // |
| // Note: the logic of this method should mirror the logic of |
| // constantPoolOopDesc::verify_constant_pool_resolve. |
| bool ciEnv::check_klass_accessibility(ciKlass* accessing_klass, |
| klassOop resolved_klass) { |
| if (accessing_klass == NULL || !accessing_klass->is_loaded()) { |
| return true; |
| } |
| if (accessing_klass->is_obj_array()) { |
| accessing_klass = accessing_klass->as_obj_array_klass()->base_element_klass(); |
| } |
| if (!accessing_klass->is_instance_klass()) { |
| return true; |
| } |
| |
| if (resolved_klass->klass_part()->oop_is_objArray()) { |
| // Find the element klass, if this is an array. |
| resolved_klass = objArrayKlass::cast(resolved_klass)->bottom_klass(); |
| } |
| if (resolved_klass->klass_part()->oop_is_instance()) { |
| return Reflection::verify_class_access(accessing_klass->get_klassOop(), |
| resolved_klass, |
| true); |
| } |
| return true; |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::get_klass_by_name_impl |
| ciKlass* ciEnv::get_klass_by_name_impl(ciKlass* accessing_klass, |
| ciSymbol* name, |
| bool require_local) { |
| ASSERT_IN_VM; |
| EXCEPTION_CONTEXT; |
| |
| // Now we need to check the SystemDictionary |
| symbolHandle sym(THREAD, name->get_symbolOop()); |
| if (sym->byte_at(0) == 'L' && |
| sym->byte_at(sym->utf8_length()-1) == ';') { |
| // This is a name from a signature. Strip off the trimmings. |
| sym = oopFactory::new_symbol_handle(sym->as_utf8()+1, |
| sym->utf8_length()-2, |
| KILL_COMPILE_ON_FATAL_(_unloaded_ciinstance_klass)); |
| name = get_object(sym())->as_symbol(); |
| } |
| |
| // Check for prior unloaded klass. The SystemDictionary's answers |
| // can vary over time but the compiler needs consistency. |
| ciKlass* unloaded_klass = check_get_unloaded_klass(accessing_klass, name); |
| if (unloaded_klass != NULL) { |
| if (require_local) return NULL; |
| return unloaded_klass; |
| } |
| |
| Handle loader(THREAD, (oop)NULL); |
| Handle domain(THREAD, (oop)NULL); |
| if (accessing_klass != NULL) { |
| loader = Handle(THREAD, accessing_klass->loader()); |
| domain = Handle(THREAD, accessing_klass->protection_domain()); |
| } |
| |
| // setup up the proper type to return on OOM |
| ciKlass* fail_type; |
| if (sym->byte_at(0) == '[') { |
| fail_type = _unloaded_ciobjarrayklass; |
| } else { |
| fail_type = _unloaded_ciinstance_klass; |
| } |
| klassOop found_klass; |
| if (!require_local) { |
| found_klass = |
| SystemDictionary::find_constrained_instance_or_array_klass(sym, loader, |
| KILL_COMPILE_ON_FATAL_(fail_type)); |
| } else { |
| found_klass = |
| SystemDictionary::find_instance_or_array_klass(sym, loader, domain, |
| KILL_COMPILE_ON_FATAL_(fail_type)); |
| } |
| |
| if (found_klass != NULL) { |
| // Found it. Build a CI handle. |
| return get_object(found_klass)->as_klass(); |
| } |
| |
| // If we fail to find an array klass, look again for its element type. |
| // The element type may be available either locally or via constraints. |
| // In either case, if we can find the element type in the system dictionary, |
| // we must build an array type around it. The CI requires array klasses |
| // to be loaded if their element klasses are loaded, except when memory |
| // is exhausted. |
| if (sym->byte_at(0) == '[' && |
| (sym->byte_at(1) == '[' || sym->byte_at(1) == 'L')) { |
| // We have an unloaded array. |
| // Build it on the fly if the element class exists. |
| symbolOop elem_sym = oopFactory::new_symbol(sym->as_utf8()+1, |
| sym->utf8_length()-1, |
| KILL_COMPILE_ON_FATAL_(fail_type)); |
| // Get element ciKlass recursively. |
| ciKlass* elem_klass = |
| get_klass_by_name_impl(accessing_klass, |
| get_object(elem_sym)->as_symbol(), |
| require_local); |
| if (elem_klass != NULL && elem_klass->is_loaded()) { |
| // Now make an array for it |
| return ciObjArrayKlass::make_impl(elem_klass); |
| } |
| } |
| |
| if (require_local) return NULL; |
| // Not yet loaded into the VM, or not governed by loader constraints. |
| // Make a CI representative for it. |
| return get_unloaded_klass(accessing_klass, name); |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::get_klass_by_name |
| ciKlass* ciEnv::get_klass_by_name(ciKlass* accessing_klass, |
| ciSymbol* klass_name, |
| bool require_local) { |
| GUARDED_VM_ENTRY(return get_klass_by_name_impl(accessing_klass, |
| klass_name, |
| require_local);) |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::get_klass_by_index_impl |
| // |
| // Implementation of get_klass_by_index. |
| ciKlass* ciEnv::get_klass_by_index_impl(ciInstanceKlass* accessor, |
| int index, |
| bool& is_accessible) { |
| assert(accessor->get_instanceKlass()->is_linked(), "must be linked before accessing constant pool"); |
| EXCEPTION_CONTEXT; |
| constantPoolHandle cpool(THREAD, accessor->get_instanceKlass()->constants()); |
| KlassHandle klass (THREAD, constantPoolOopDesc::klass_at_if_loaded(cpool, index)); |
| symbolHandle klass_name; |
| if (klass.is_null()) { |
| // The klass has not been inserted into the constant pool. |
| // Try to look it up by name. |
| { |
| // We have to lock the cpool to keep the oop from being resolved |
| // while we are accessing it. |
| ObjectLocker ol(cpool, THREAD); |
| |
| constantTag tag = cpool->tag_at(index); |
| if (tag.is_klass()) { |
| // The klass has been inserted into the constant pool |
| // very recently. |
| klass = KlassHandle(THREAD, cpool->resolved_klass_at(index)); |
| } else if (tag.is_symbol()) { |
| klass_name = symbolHandle(THREAD, cpool->symbol_at(index)); |
| } else { |
| assert(cpool->tag_at(index).is_unresolved_klass(), "wrong tag"); |
| klass_name = symbolHandle(THREAD, cpool->unresolved_klass_at(index)); |
| } |
| } |
| } |
| |
| if (klass.is_null()) { |
| // Not found in constant pool. Use the name to do the lookup. |
| ciKlass* k = get_klass_by_name_impl(accessor, |
| get_object(klass_name())->as_symbol(), |
| false); |
| // Calculate accessibility the hard way. |
| if (!k->is_loaded()) { |
| is_accessible = false; |
| } else if (k->loader() != accessor->loader() && |
| get_klass_by_name_impl(accessor, k->name(), true) == NULL) { |
| // Loaded only remotely. Not linked yet. |
| is_accessible = false; |
| } else { |
| // Linked locally, and we must also check public/private, etc. |
| is_accessible = check_klass_accessibility(accessor, k->get_klassOop()); |
| } |
| return k; |
| } |
| |
| // Check for prior unloaded klass. The SystemDictionary's answers |
| // can vary over time but the compiler needs consistency. |
| ciSymbol* name = get_object(klass()->klass_part()->name())->as_symbol(); |
| ciKlass* unloaded_klass = check_get_unloaded_klass(accessor, name); |
| if (unloaded_klass != NULL) { |
| is_accessible = false; |
| return unloaded_klass; |
| } |
| |
| // It is known to be accessible, since it was found in the constant pool. |
| is_accessible = true; |
| return get_object(klass())->as_klass(); |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::get_klass_by_index |
| // |
| // Get a klass from the constant pool. |
| ciKlass* ciEnv::get_klass_by_index(ciInstanceKlass* accessor, |
| int index, |
| bool& is_accessible) { |
| GUARDED_VM_ENTRY(return get_klass_by_index_impl(accessor, index, is_accessible);) |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::get_constant_by_index_impl |
| // |
| // Implementation of get_constant_by_index(). |
| ciConstant ciEnv::get_constant_by_index_impl(ciInstanceKlass* accessor, |
| int index) { |
| EXCEPTION_CONTEXT; |
| instanceKlass* ik_accessor = accessor->get_instanceKlass(); |
| assert(ik_accessor->is_linked(), "must be linked before accessing constant pool"); |
| constantPoolOop cpool = ik_accessor->constants(); |
| constantTag tag = cpool->tag_at(index); |
| if (tag.is_int()) { |
| return ciConstant(T_INT, (jint)cpool->int_at(index)); |
| } else if (tag.is_long()) { |
| return ciConstant((jlong)cpool->long_at(index)); |
| } else if (tag.is_float()) { |
| return ciConstant((jfloat)cpool->float_at(index)); |
| } else if (tag.is_double()) { |
| return ciConstant((jdouble)cpool->double_at(index)); |
| } else if (tag.is_string() || tag.is_unresolved_string()) { |
| oop string = cpool->string_at(index, THREAD); |
| if (HAS_PENDING_EXCEPTION) { |
| CLEAR_PENDING_EXCEPTION; |
| record_out_of_memory_failure(); |
| return ciConstant(); |
| } |
| ciObject* constant = get_object(string); |
| assert (constant->is_instance(), "must be an instance, or not? "); |
| return ciConstant(T_OBJECT, constant); |
| } else if (tag.is_klass() || tag.is_unresolved_klass()) { |
| // 4881222: allow ldc to take a class type |
| bool ignore; |
| ciKlass* klass = get_klass_by_index_impl(accessor, index, ignore); |
| if (HAS_PENDING_EXCEPTION) { |
| CLEAR_PENDING_EXCEPTION; |
| record_out_of_memory_failure(); |
| return ciConstant(); |
| } |
| assert (klass->is_instance_klass() || klass->is_array_klass(), |
| "must be an instance or array klass "); |
| return ciConstant(T_OBJECT, klass); |
| } else { |
| ShouldNotReachHere(); |
| return ciConstant(); |
| } |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::is_unresolved_string_impl |
| // |
| // Implementation of is_unresolved_string(). |
| bool ciEnv::is_unresolved_string_impl(instanceKlass* accessor, int index) const { |
| EXCEPTION_CONTEXT; |
| assert(accessor->is_linked(), "must be linked before accessing constant pool"); |
| constantPoolOop cpool = accessor->constants(); |
| constantTag tag = cpool->tag_at(index); |
| return tag.is_unresolved_string(); |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::is_unresolved_klass_impl |
| // |
| // Implementation of is_unresolved_klass(). |
| bool ciEnv::is_unresolved_klass_impl(instanceKlass* accessor, int index) const { |
| EXCEPTION_CONTEXT; |
| assert(accessor->is_linked(), "must be linked before accessing constant pool"); |
| constantPoolOop cpool = accessor->constants(); |
| constantTag tag = cpool->tag_at(index); |
| return tag.is_unresolved_klass(); |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::get_constant_by_index |
| // |
| // Pull a constant out of the constant pool. How appropriate. |
| // |
| // Implementation note: this query is currently in no way cached. |
| ciConstant ciEnv::get_constant_by_index(ciInstanceKlass* accessor, |
| int index) { |
| GUARDED_VM_ENTRY(return get_constant_by_index_impl(accessor, index); ) |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::is_unresolved_string |
| // |
| // Check constant pool |
| // |
| // Implementation note: this query is currently in no way cached. |
| bool ciEnv::is_unresolved_string(ciInstanceKlass* accessor, |
| int index) const { |
| GUARDED_VM_ENTRY(return is_unresolved_string_impl(accessor->get_instanceKlass(), index); ) |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::is_unresolved_klass |
| // |
| // Check constant pool |
| // |
| // Implementation note: this query is currently in no way cached. |
| bool ciEnv::is_unresolved_klass(ciInstanceKlass* accessor, |
| int index) const { |
| GUARDED_VM_ENTRY(return is_unresolved_klass_impl(accessor->get_instanceKlass(), index); ) |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::get_field_by_index_impl |
| // |
| // Implementation of get_field_by_index. |
| // |
| // Implementation note: the results of field lookups are cached |
| // in the accessor klass. |
| ciField* ciEnv::get_field_by_index_impl(ciInstanceKlass* accessor, |
| int index) { |
| ciConstantPoolCache* cache = accessor->field_cache(); |
| if (cache == NULL) { |
| ciField* field = new (arena()) ciField(accessor, index); |
| return field; |
| } else { |
| ciField* field = (ciField*)cache->get(index); |
| if (field == NULL) { |
| field = new (arena()) ciField(accessor, index); |
| cache->insert(index, field); |
| } |
| return field; |
| } |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::get_field_by_index |
| // |
| // Get a field by index from a klass's constant pool. |
| ciField* ciEnv::get_field_by_index(ciInstanceKlass* accessor, |
| int index) { |
| GUARDED_VM_ENTRY(return get_field_by_index_impl(accessor, index);) |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::lookup_method |
| // |
| // Perform an appropriate method lookup based on accessor, holder, |
| // name, signature, and bytecode. |
| methodOop ciEnv::lookup_method(instanceKlass* accessor, |
| instanceKlass* holder, |
| symbolOop name, |
| symbolOop sig, |
| Bytecodes::Code bc) { |
| EXCEPTION_CONTEXT; |
| KlassHandle h_accessor(THREAD, accessor); |
| KlassHandle h_holder(THREAD, holder); |
| symbolHandle h_name(THREAD, name); |
| symbolHandle h_sig(THREAD, sig); |
| LinkResolver::check_klass_accessability(h_accessor, h_holder, KILL_COMPILE_ON_FATAL_(NULL)); |
| methodHandle dest_method; |
| switch (bc) { |
| case Bytecodes::_invokestatic: |
| dest_method = |
| LinkResolver::resolve_static_call_or_null(h_holder, h_name, h_sig, h_accessor); |
| break; |
| case Bytecodes::_invokespecial: |
| dest_method = |
| LinkResolver::resolve_special_call_or_null(h_holder, h_name, h_sig, h_accessor); |
| break; |
| case Bytecodes::_invokeinterface: |
| dest_method = |
| LinkResolver::linktime_resolve_interface_method_or_null(h_holder, h_name, h_sig, |
| h_accessor, true); |
| break; |
| case Bytecodes::_invokevirtual: |
| dest_method = |
| LinkResolver::linktime_resolve_virtual_method_or_null(h_holder, h_name, h_sig, |
| h_accessor, true); |
| break; |
| default: ShouldNotReachHere(); |
| } |
| |
| return dest_method(); |
| } |
| |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::get_method_by_index_impl |
| ciMethod* ciEnv::get_method_by_index_impl(ciInstanceKlass* accessor, |
| int index, Bytecodes::Code bc) { |
| // Get the method's declared holder. |
| |
| assert(accessor->get_instanceKlass()->is_linked(), "must be linked before accessing constant pool"); |
| constantPoolHandle cpool = accessor->get_instanceKlass()->constants(); |
| int holder_index = cpool->klass_ref_index_at(index); |
| bool holder_is_accessible; |
| ciKlass* holder = get_klass_by_index_impl(accessor, holder_index, holder_is_accessible); |
| ciInstanceKlass* declared_holder = get_instance_klass_for_declared_method_holder(holder); |
| |
| // Get the method's name and signature. |
| int nt_index = cpool->name_and_type_ref_index_at(index); |
| int sig_index = cpool->signature_ref_index_at(nt_index); |
| symbolOop name_sym = cpool->name_ref_at(index); |
| symbolOop sig_sym = cpool->symbol_at(sig_index); |
| |
| if (holder_is_accessible) { // Our declared holder is loaded. |
| instanceKlass* lookup = declared_holder->get_instanceKlass(); |
| methodOop m = lookup_method(accessor->get_instanceKlass(), lookup, name_sym, sig_sym, bc); |
| if (m != NULL) { |
| // We found the method. |
| return get_object(m)->as_method(); |
| } |
| } |
| |
| // Either the declared holder was not loaded, or the method could |
| // not be found. Create a dummy ciMethod to represent the failed |
| // lookup. |
| |
| return get_unloaded_method(declared_holder, |
| get_object(name_sym)->as_symbol(), |
| get_object(sig_sym)->as_symbol()); |
| } |
| |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::get_instance_klass_for_declared_method_holder |
| ciInstanceKlass* ciEnv::get_instance_klass_for_declared_method_holder(ciKlass* method_holder) { |
| // For the case of <array>.clone(), the method holder can be a ciArrayKlass |
| // instead of a ciInstanceKlass. For that case simply pretend that the |
| // declared holder is Object.clone since that's where the call will bottom out. |
| // A more correct fix would trickle out through many interfaces in CI, |
| // requiring ciInstanceKlass* to become ciKlass* and many more places would |
| // require checks to make sure the expected type was found. Given that this |
| // only occurs for clone() the more extensive fix seems like overkill so |
| // instead we simply smear the array type into Object. |
| if (method_holder->is_instance_klass()) { |
| return method_holder->as_instance_klass(); |
| } else if (method_holder->is_array_klass()) { |
| return current()->Object_klass(); |
| } else { |
| ShouldNotReachHere(); |
| } |
| return NULL; |
| } |
| |
| |
| |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::get_method_by_index |
| ciMethod* ciEnv::get_method_by_index(ciInstanceKlass* accessor, |
| int index, Bytecodes::Code bc) { |
| GUARDED_VM_ENTRY(return get_method_by_index_impl(accessor, index, bc);) |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::name_buffer |
| char *ciEnv::name_buffer(int req_len) { |
| if (_name_buffer_len < req_len) { |
| if (_name_buffer == NULL) { |
| _name_buffer = (char*)arena()->Amalloc(sizeof(char)*req_len); |
| _name_buffer_len = req_len; |
| } else { |
| _name_buffer = |
| (char*)arena()->Arealloc(_name_buffer, _name_buffer_len, req_len); |
| _name_buffer_len = req_len; |
| } |
| } |
| return _name_buffer; |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::is_in_vm |
| bool ciEnv::is_in_vm() { |
| return JavaThread::current()->thread_state() == _thread_in_vm; |
| } |
| |
| bool ciEnv::system_dictionary_modification_counter_changed() { |
| return _system_dictionary_modification_counter != SystemDictionary::number_of_modifications(); |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::check_for_system_dictionary_modification |
| // Check for changes to the system dictionary during compilation |
| // class loads, evolution, breakpoints |
| void ciEnv::check_for_system_dictionary_modification(ciMethod* target) { |
| if (failing()) return; // no need for further checks |
| |
| // Dependencies must be checked when the system dictionary changes. |
| // If logging is enabled all violated dependences will be recorded in |
| // the log. In debug mode check dependencies even if the system |
| // dictionary hasn't changed to verify that no invalid dependencies |
| // were inserted. Any violated dependences in this case are dumped to |
| // the tty. |
| |
| bool counter_changed = system_dictionary_modification_counter_changed(); |
| bool test_deps = counter_changed; |
| DEBUG_ONLY(test_deps = true); |
| if (!test_deps) return; |
| |
| bool print_failures = false; |
| DEBUG_ONLY(print_failures = !counter_changed); |
| |
| bool keep_going = (print_failures || xtty != NULL); |
| |
| int violated = 0; |
| |
| for (Dependencies::DepStream deps(dependencies()); deps.next(); ) { |
| klassOop witness = deps.check_dependency(); |
| if (witness != NULL) { |
| ++violated; |
| if (print_failures) deps.print_dependency(witness, /*verbose=*/ true); |
| // If there's no log and we're not sanity-checking, we're done. |
| if (!keep_going) break; |
| } |
| } |
| |
| if (violated != 0) { |
| assert(counter_changed, "failed dependencies, but counter didn't change"); |
| record_failure("concurrent class loading"); |
| } |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::register_method |
| void ciEnv::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, |
| bool has_unsafe_access) { |
| VM_ENTRY_MARK; |
| nmethod* nm = NULL; |
| { |
| // To prevent compile queue updates. |
| MutexLocker locker(MethodCompileQueue_lock, THREAD); |
| |
| // Prevent SystemDictionary::add_to_hierarchy from running |
| // and invalidating our dependencies until we install this method. |
| MutexLocker ml(Compile_lock); |
| |
| if (log() != NULL) { |
| // Log the dependencies which this compilation declares. |
| dependencies()->log_all_dependencies(); |
| } |
| |
| // Encode the dependencies now, so we can check them right away. |
| dependencies()->encode_content_bytes(); |
| |
| // Check for {class loads, evolution, breakpoints} during compilation |
| check_for_system_dictionary_modification(target); |
| |
| methodHandle method(THREAD, target->get_methodOop()); |
| |
| if (failing()) { |
| // While not a true deoptimization, it is a preemptive decompile. |
| methodDataOop mdo = method()->method_data(); |
| if (mdo != NULL) { |
| mdo->inc_decompile_count(); |
| } |
| |
| // All buffers in the CodeBuffer are allocated in the CodeCache. |
| // If the code buffer is created on each compile attempt |
| // as in C2, then it must be freed. |
| code_buffer->free_blob(); |
| return; |
| } |
| |
| assert(offsets->value(CodeOffsets::Deopt) != -1, "must have deopt entry"); |
| assert(offsets->value(CodeOffsets::Exceptions) != -1, "must have exception entry"); |
| |
| nm = nmethod::new_nmethod(method, |
| compile_id(), |
| entry_bci, |
| offsets, |
| orig_pc_offset, |
| debug_info(), dependencies(), code_buffer, |
| frame_words, oop_map_set, |
| handler_table, inc_table, |
| compiler, comp_level); |
| |
| // Free codeBlobs |
| code_buffer->free_blob(); |
| |
| // stress test 6243940 by immediately making the method |
| // non-entrant behind the system's back. This has serious |
| // side effects on the code cache and is not meant for |
| // general stress testing |
| if (nm != NULL && StressNonEntrant) { |
| MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); |
| NativeJump::patch_verified_entry(nm->entry_point(), nm->verified_entry_point(), |
| SharedRuntime::get_handle_wrong_method_stub()); |
| } |
| |
| if (nm == NULL) { |
| // The CodeCache is full. Print out warning and disable compilation. |
| record_failure("code cache is full"); |
| UseInterpreter = true; |
| if (UseCompiler || AlwaysCompileLoopMethods ) { |
| #ifndef PRODUCT |
| warning("CodeCache is full. Compiler has been disabled"); |
| if (CompileTheWorld || ExitOnFullCodeCache) { |
| before_exit(JavaThread::current()); |
| exit_globals(); // will delete tty |
| vm_direct_exit(CompileTheWorld ? 0 : 1); |
| } |
| #endif |
| UseCompiler = false; |
| AlwaysCompileLoopMethods = false; |
| } |
| } else { |
| NOT_PRODUCT(nm->set_has_debug_info(has_debug_info); ) |
| nm->set_has_unsafe_access(has_unsafe_access); |
| |
| // Record successful registration. |
| // (Put nm into the task handle *before* publishing to the Java heap.) |
| if (task() != NULL) task()->set_code(nm); |
| |
| if (entry_bci == InvocationEntryBci) { |
| #ifdef TIERED |
| // If there is an old version we're done with it |
| nmethod* old = method->code(); |
| if (TraceMethodReplacement && old != NULL) { |
| ResourceMark rm; |
| char *method_name = method->name_and_sig_as_C_string(); |
| tty->print_cr("Replacing method %s", method_name); |
| } |
| if (old != NULL ) { |
| old->make_not_entrant(); |
| } |
| #endif // TIERED |
| if (TraceNMethodInstalls ) { |
| ResourceMark rm; |
| char *method_name = method->name_and_sig_as_C_string(); |
| ttyLocker ttyl; |
| tty->print_cr("Installing method (%d) %s ", |
| comp_level, |
| method_name); |
| } |
| // Allow the code to be executed |
| method->set_code(method, nm); |
| } else { |
| if (TraceNMethodInstalls ) { |
| ResourceMark rm; |
| char *method_name = method->name_and_sig_as_C_string(); |
| ttyLocker ttyl; |
| tty->print_cr("Installing osr method (%d) %s @ %d", |
| comp_level, |
| method_name, |
| entry_bci); |
| } |
| instanceKlass::cast(method->method_holder())->add_osr_nmethod(nm); |
| |
| } |
| } |
| } |
| // JVMTI -- compiled method notification (must be done outside lock) |
| if (nm != NULL) { |
| nm->post_compiled_method_load_event(); |
| } |
| |
| } |
| |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::find_system_klass |
| ciKlass* ciEnv::find_system_klass(ciSymbol* klass_name) { |
| VM_ENTRY_MARK; |
| return get_klass_by_name_impl(NULL, klass_name, false); |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::comp_level |
| int ciEnv::comp_level() { |
| if (task() == NULL) return CompLevel_full_optimization; |
| return task()->comp_level(); |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::compile_id |
| uint ciEnv::compile_id() { |
| if (task() == NULL) return 0; |
| return task()->compile_id(); |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::notice_inlined_method() |
| void ciEnv::notice_inlined_method(ciMethod* method) { |
| _num_inlined_bytecodes += method->code_size(); |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::num_inlined_bytecodes() |
| int ciEnv::num_inlined_bytecodes() const { |
| return _num_inlined_bytecodes; |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::record_failure() |
| void ciEnv::record_failure(const char* reason) { |
| if (log() != NULL) { |
| log()->elem("failure reason='%s'", reason); |
| } |
| if (_failure_reason == NULL) { |
| // Record the first failure reason. |
| _failure_reason = reason; |
| } |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::record_method_not_compilable() |
| void ciEnv::record_method_not_compilable(const char* reason, bool all_tiers) { |
| int new_compilable = |
| all_tiers ? MethodCompilable_never : MethodCompilable_not_at_tier ; |
| |
| // Only note transitions to a worse state |
| if (new_compilable > _compilable) { |
| if (log() != NULL) { |
| if (all_tiers) { |
| log()->elem("method_not_compilable"); |
| } else { |
| log()->elem("method_not_compilable_at_tier"); |
| } |
| } |
| _compilable = new_compilable; |
| |
| // Reset failure reason; this one is more important. |
| _failure_reason = NULL; |
| record_failure(reason); |
| } |
| } |
| |
| // ------------------------------------------------------------------ |
| // ciEnv::record_out_of_memory_failure() |
| void ciEnv::record_out_of_memory_failure() { |
| // If memory is low, we stop compiling methods. |
| record_method_not_compilable("out of memory"); |
| } |
