--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/ci/ciEnv.cpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,1004 @@
+/*
+ * 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");
+}