aoqi@0: /*
aoqi@0:  * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@0: #include "precompiled.hpp"
aoqi@0: #include "ci/ciConstant.hpp"
aoqi@0: #include "ci/ciEnv.hpp"
aoqi@0: #include "ci/ciField.hpp"
aoqi@0: #include "ci/ciInstance.hpp"
aoqi@0: #include "ci/ciInstanceKlass.hpp"
aoqi@0: #include "ci/ciMethod.hpp"
aoqi@0: #include "ci/ciNullObject.hpp"
aoqi@0: #include "ci/ciReplay.hpp"
aoqi@0: #include "ci/ciUtilities.hpp"
aoqi@0: #include "classfile/systemDictionary.hpp"
aoqi@0: #include "classfile/vmSymbols.hpp"
aoqi@0: #include "code/scopeDesc.hpp"
aoqi@0: #include "compiler/compileBroker.hpp"
aoqi@0: #include "compiler/compileLog.hpp"
aoqi@0: #include "compiler/compilerOracle.hpp"
aoqi@0: #include "gc_interface/collectedHeap.inline.hpp"
aoqi@0: #include "interpreter/linkResolver.hpp"
aoqi@0: #include "memory/allocation.inline.hpp"
aoqi@0: #include "memory/oopFactory.hpp"
aoqi@0: #include "memory/universe.inline.hpp"
aoqi@0: #include "oops/methodData.hpp"
aoqi@0: #include "oops/objArrayKlass.hpp"
aoqi@0: #include "oops/oop.inline.hpp"
aoqi@0: #include "oops/oop.inline2.hpp"
aoqi@0: #include "prims/jvmtiExport.hpp"
aoqi@0: #include "runtime/init.hpp"
aoqi@0: #include "runtime/reflection.hpp"
aoqi@0: #include "runtime/sharedRuntime.hpp"
goetz@6911: #include "runtime/thread.inline.hpp"
aoqi@0: #include "utilities/dtrace.hpp"
aoqi@0: #include "utilities/macros.hpp"
aoqi@0: #ifdef COMPILER1
aoqi@0: #include "c1/c1_Runtime1.hpp"
aoqi@0: #endif
aoqi@0: #ifdef COMPILER2
aoqi@0: #include "opto/runtime.hpp"
aoqi@0: #endif
aoqi@0: 
aoqi@0: // ciEnv
aoqi@0: //
aoqi@0: // This class is the top level broker for requests from the compiler
aoqi@0: // to the VM.
aoqi@0: 
aoqi@0: ciObject*              ciEnv::_null_object_instance;
aoqi@0: 
aoqi@0: #define WK_KLASS_DEFN(name, ignore_s, ignore_o) ciInstanceKlass* ciEnv::_##name = NULL;
aoqi@0: WK_KLASSES_DO(WK_KLASS_DEFN)
aoqi@0: #undef WK_KLASS_DEFN
aoqi@0: 
aoqi@0: ciSymbol*        ciEnv::_unloaded_cisymbol = NULL;
aoqi@0: ciInstanceKlass* ciEnv::_unloaded_ciinstance_klass = NULL;
aoqi@0: ciObjArrayKlass* ciEnv::_unloaded_ciobjarrayklass = NULL;
aoqi@0: 
aoqi@0: jobject ciEnv::_ArrayIndexOutOfBoundsException_handle = NULL;
aoqi@0: jobject ciEnv::_ArrayStoreException_handle = NULL;
aoqi@0: jobject ciEnv::_ClassCastException_handle = NULL;
aoqi@0: 
aoqi@0: #ifndef PRODUCT
aoqi@0: static bool firstEnv = true;
aoqi@0: #endif /* PRODUCT */
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // ciEnv::ciEnv
zgu@7074: ciEnv::ciEnv(CompileTask* task, int system_dictionary_modification_counter)
zgu@7074:   : _ciEnv_arena(mtCompiler) {
aoqi@0:   VM_ENTRY_MARK;
aoqi@0: 
aoqi@0:   // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
aoqi@0:   thread->set_env(this);
aoqi@0:   assert(ciEnv::current() == this, "sanity");
aoqi@0: 
aoqi@0:   _oop_recorder = NULL;
aoqi@0:   _debug_info = NULL;
aoqi@0:   _dependencies = NULL;
aoqi@0:   _failure_reason = NULL;
aoqi@0:   _compilable = MethodCompilable;
aoqi@0:   _break_at_compile = false;
aoqi@0:   _compiler_data = NULL;
aoqi@0: #ifndef PRODUCT
aoqi@0:   assert(!firstEnv, "not initialized properly");
aoqi@0: #endif /* !PRODUCT */
aoqi@0: 
aoqi@0:   _system_dictionary_modification_counter = system_dictionary_modification_counter;
aoqi@0:   _num_inlined_bytecodes = 0;
aoqi@0:   assert(task == NULL || thread->task() == task, "sanity");
aoqi@0:   _task = task;
aoqi@0:   _log = NULL;
aoqi@0: 
aoqi@0:   // Temporary buffer for creating symbols and such.
aoqi@0:   _name_buffer = NULL;
aoqi@0:   _name_buffer_len = 0;
aoqi@0: 
aoqi@0:   _arena   = &_ciEnv_arena;
aoqi@0:   _factory = new (_arena) ciObjectFactory(_arena, 128);
aoqi@0: 
aoqi@0:   // Preload commonly referenced system ciObjects.
aoqi@0: 
aoqi@0:   // During VM initialization, these instances have not yet been created.
aoqi@0:   // Assertions ensure that these instances are not accessed before
aoqi@0:   // their initialization.
aoqi@0: 
aoqi@0:   assert(Universe::is_fully_initialized(), "should be complete");
aoqi@0: 
aoqi@0:   oop o = Universe::null_ptr_exception_instance();
aoqi@0:   assert(o != NULL, "should have been initialized");
aoqi@0:   _NullPointerException_instance = get_object(o)->as_instance();
aoqi@0:   o = Universe::arithmetic_exception_instance();
aoqi@0:   assert(o != NULL, "should have been initialized");
aoqi@0:   _ArithmeticException_instance = get_object(o)->as_instance();
aoqi@0: 
aoqi@0:   _ArrayIndexOutOfBoundsException_instance = NULL;
aoqi@0:   _ArrayStoreException_instance = NULL;
aoqi@0:   _ClassCastException_instance = NULL;
aoqi@0:   _the_null_string = NULL;
aoqi@0:   _the_min_jint_string = NULL;
aoqi@0: }
aoqi@0: 
zgu@7074: ciEnv::ciEnv(Arena* arena) : _ciEnv_arena(mtCompiler) {
aoqi@0:   ASSERT_IN_VM;
aoqi@0: 
aoqi@0:   // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
aoqi@0:   CompilerThread* current_thread = CompilerThread::current();
aoqi@0:   assert(current_thread->env() == NULL, "must be");
aoqi@0:   current_thread->set_env(this);
aoqi@0:   assert(ciEnv::current() == this, "sanity");
aoqi@0: 
aoqi@0:   _oop_recorder = NULL;
aoqi@0:   _debug_info = NULL;
aoqi@0:   _dependencies = NULL;
aoqi@0:   _failure_reason = NULL;
aoqi@0:   _compilable = MethodCompilable_never;
aoqi@0:   _break_at_compile = false;
aoqi@0:   _compiler_data = NULL;
aoqi@0: #ifndef PRODUCT
aoqi@0:   assert(firstEnv, "must be first");
aoqi@0:   firstEnv = false;
aoqi@0: #endif /* !PRODUCT */
aoqi@0: 
aoqi@0:   _system_dictionary_modification_counter = 0;
aoqi@0:   _num_inlined_bytecodes = 0;
aoqi@0:   _task = NULL;
aoqi@0:   _log = NULL;
aoqi@0: 
aoqi@0:   // Temporary buffer for creating symbols and such.
aoqi@0:   _name_buffer = NULL;
aoqi@0:   _name_buffer_len = 0;
aoqi@0: 
aoqi@0:   _arena   = arena;
aoqi@0:   _factory = new (_arena) ciObjectFactory(_arena, 128);
aoqi@0: 
aoqi@0:   // Preload commonly referenced system ciObjects.
aoqi@0: 
aoqi@0:   // During VM initialization, these instances have not yet been created.
aoqi@0:   // Assertions ensure that these instances are not accessed before
aoqi@0:   // their initialization.
aoqi@0: 
aoqi@0:   assert(Universe::is_fully_initialized(), "must be");
aoqi@0: 
aoqi@0:   _NullPointerException_instance = NULL;
aoqi@0:   _ArithmeticException_instance = NULL;
aoqi@0:   _ArrayIndexOutOfBoundsException_instance = NULL;
aoqi@0:   _ArrayStoreException_instance = NULL;
aoqi@0:   _ClassCastException_instance = NULL;
aoqi@0:   _the_null_string = NULL;
aoqi@0:   _the_min_jint_string = NULL;
aoqi@0: }
aoqi@0: 
aoqi@0: ciEnv::~ciEnv() {
aoqi@0:   CompilerThread* current_thread = CompilerThread::current();
aoqi@0:   _factory->remove_symbols();
aoqi@0:   // Need safepoint to clear the env on the thread.  RedefineClasses might
aoqi@0:   // be reading it.
aoqi@0:   GUARDED_VM_ENTRY(current_thread->set_env(NULL);)
aoqi@0: }
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // Cache Jvmti state
aoqi@0: void ciEnv::cache_jvmti_state() {
aoqi@0:   VM_ENTRY_MARK;
aoqi@0:   // Get Jvmti capabilities under lock to get consistant values.
aoqi@0:   MutexLocker mu(JvmtiThreadState_lock);
aoqi@0:   _jvmti_can_hotswap_or_post_breakpoint = JvmtiExport::can_hotswap_or_post_breakpoint();
aoqi@0:   _jvmti_can_access_local_variables     = JvmtiExport::can_access_local_variables();
aoqi@0:   _jvmti_can_post_on_exceptions         = JvmtiExport::can_post_on_exceptions();
aoqi@0: }
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // Cache DTrace flags
aoqi@0: void ciEnv::cache_dtrace_flags() {
aoqi@0:   // Need lock?
aoqi@0:   _dtrace_extended_probes = ExtendedDTraceProbes;
aoqi@0:   if (_dtrace_extended_probes) {
aoqi@0:     _dtrace_monitor_probes  = true;
aoqi@0:     _dtrace_method_probes   = true;
aoqi@0:     _dtrace_alloc_probes    = true;
aoqi@0:   } else {
aoqi@0:     _dtrace_monitor_probes  = DTraceMonitorProbes;
aoqi@0:     _dtrace_method_probes   = DTraceMethodProbes;
aoqi@0:     _dtrace_alloc_probes    = DTraceAllocProbes;
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // helper for lazy exception creation
aoqi@0: ciInstance* ciEnv::get_or_create_exception(jobject& handle, Symbol* name) {
aoqi@0:   VM_ENTRY_MARK;
aoqi@0:   if (handle == NULL) {
aoqi@0:     // Cf. universe.cpp, creation of Universe::_null_ptr_exception_instance.
aoqi@0:     Klass* k = SystemDictionary::find(name, Handle(), Handle(), THREAD);
aoqi@0:     jobject objh = NULL;
aoqi@0:     if (!HAS_PENDING_EXCEPTION && k != NULL) {
aoqi@0:       oop obj = InstanceKlass::cast(k)->allocate_instance(THREAD);
aoqi@0:       if (!HAS_PENDING_EXCEPTION)
aoqi@0:         objh = JNIHandles::make_global(obj);
aoqi@0:     }
aoqi@0:     if (HAS_PENDING_EXCEPTION) {
aoqi@0:       CLEAR_PENDING_EXCEPTION;
aoqi@0:     } else {
aoqi@0:       handle = objh;
aoqi@0:     }
aoqi@0:   }
aoqi@0:   oop obj = JNIHandles::resolve(handle);
aoqi@0:   return obj == NULL? NULL: get_object(obj)->as_instance();
aoqi@0: }
aoqi@0: 
aoqi@0: ciInstance* ciEnv::ArrayIndexOutOfBoundsException_instance() {
aoqi@0:   if (_ArrayIndexOutOfBoundsException_instance == NULL) {
aoqi@0:     _ArrayIndexOutOfBoundsException_instance
aoqi@0:           = get_or_create_exception(_ArrayIndexOutOfBoundsException_handle,
aoqi@0:           vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
aoqi@0:   }
aoqi@0:   return _ArrayIndexOutOfBoundsException_instance;
aoqi@0: }
aoqi@0: ciInstance* ciEnv::ArrayStoreException_instance() {
aoqi@0:   if (_ArrayStoreException_instance == NULL) {
aoqi@0:     _ArrayStoreException_instance
aoqi@0:           = get_or_create_exception(_ArrayStoreException_handle,
aoqi@0:           vmSymbols::java_lang_ArrayStoreException());
aoqi@0:   }
aoqi@0:   return _ArrayStoreException_instance;
aoqi@0: }
aoqi@0: ciInstance* ciEnv::ClassCastException_instance() {
aoqi@0:   if (_ClassCastException_instance == NULL) {
aoqi@0:     _ClassCastException_instance
aoqi@0:           = get_or_create_exception(_ClassCastException_handle,
aoqi@0:           vmSymbols::java_lang_ClassCastException());
aoqi@0:   }
aoqi@0:   return _ClassCastException_instance;
aoqi@0: }
aoqi@0: 
aoqi@0: ciInstance* ciEnv::the_null_string() {
aoqi@0:   if (_the_null_string == NULL) {
aoqi@0:     VM_ENTRY_MARK;
aoqi@0:     _the_null_string = get_object(Universe::the_null_string())->as_instance();
aoqi@0:   }
aoqi@0:   return _the_null_string;
aoqi@0: }
aoqi@0: 
aoqi@0: ciInstance* ciEnv::the_min_jint_string() {
aoqi@0:   if (_the_min_jint_string == NULL) {
aoqi@0:     VM_ENTRY_MARK;
aoqi@0:     _the_min_jint_string = get_object(Universe::the_min_jint_string())->as_instance();
aoqi@0:   }
aoqi@0:   return _the_min_jint_string;
aoqi@0: }
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // ciEnv::get_method_from_handle
aoqi@0: ciMethod* ciEnv::get_method_from_handle(Method* method) {
aoqi@0:   VM_ENTRY_MARK;
aoqi@0:   return get_metadata(method)->as_method();
aoqi@0: }
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // ciEnv::array_element_offset_in_bytes
aoqi@0: int ciEnv::array_element_offset_in_bytes(ciArray* a_h, ciObject* o_h) {
aoqi@0:   VM_ENTRY_MARK;
aoqi@0:   objArrayOop a = (objArrayOop)a_h->get_oop();
aoqi@0:   assert(a->is_objArray(), "");
aoqi@0:   int length = a->length();
aoqi@0:   oop o = o_h->get_oop();
aoqi@0:   for (int i = 0; i < length; i++) {
aoqi@0:     if (a->obj_at(i) == o)  return i;
aoqi@0:   }
aoqi@0:   return -1;
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // ciEnv::check_klass_accessiblity
aoqi@0: //
aoqi@0: // Note: the logic of this method should mirror the logic of
aoqi@0: // ConstantPool::verify_constant_pool_resolve.
aoqi@0: bool ciEnv::check_klass_accessibility(ciKlass* accessing_klass,
aoqi@0:                                       Klass* resolved_klass) {
aoqi@0:   if (accessing_klass == NULL || !accessing_klass->is_loaded()) {
aoqi@0:     return true;
aoqi@0:   }
aoqi@0:   if (accessing_klass->is_obj_array_klass()) {
aoqi@0:     accessing_klass = accessing_klass->as_obj_array_klass()->base_element_klass();
aoqi@0:   }
aoqi@0:   if (!accessing_klass->is_instance_klass()) {
aoqi@0:     return true;
aoqi@0:   }
aoqi@0: 
aoqi@0:   if (resolved_klass->oop_is_objArray()) {
aoqi@0:     // Find the element klass, if this is an array.
aoqi@0:     resolved_klass = ObjArrayKlass::cast(resolved_klass)->bottom_klass();
aoqi@0:   }
aoqi@0:   if (resolved_klass->oop_is_instance()) {
aoqi@0:     return Reflection::verify_class_access(accessing_klass->get_Klass(),
aoqi@0:                                            resolved_klass,
aoqi@0:                                            true);
aoqi@0:   }
aoqi@0:   return true;
aoqi@0: }
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // ciEnv::get_klass_by_name_impl
aoqi@0: ciKlass* ciEnv::get_klass_by_name_impl(ciKlass* accessing_klass,
aoqi@0:                                        constantPoolHandle cpool,
aoqi@0:                                        ciSymbol* name,
aoqi@0:                                        bool require_local) {
aoqi@0:   ASSERT_IN_VM;
aoqi@0:   EXCEPTION_CONTEXT;
aoqi@0: 
aoqi@0:   // Now we need to check the SystemDictionary
aoqi@0:   Symbol* sym = name->get_symbol();
aoqi@0:   if (sym->byte_at(0) == 'L' &&
aoqi@0:     sym->byte_at(sym->utf8_length()-1) == ';') {
aoqi@0:     // This is a name from a signature.  Strip off the trimmings.
aoqi@0:     // Call recursive to keep scope of strippedsym.
aoqi@0:     TempNewSymbol strippedsym = SymbolTable::new_symbol(sym->as_utf8()+1,
aoqi@0:                     sym->utf8_length()-2,
aoqi@0:                     KILL_COMPILE_ON_FATAL_(_unloaded_ciinstance_klass));
aoqi@0:     ciSymbol* strippedname = get_symbol(strippedsym);
aoqi@0:     return get_klass_by_name_impl(accessing_klass, cpool, strippedname, require_local);
aoqi@0:   }
aoqi@0: 
aoqi@0:   // Check for prior unloaded klass.  The SystemDictionary's answers
aoqi@0:   // can vary over time but the compiler needs consistency.
aoqi@0:   ciKlass* unloaded_klass = check_get_unloaded_klass(accessing_klass, name);
aoqi@0:   if (unloaded_klass != NULL) {
aoqi@0:     if (require_local)  return NULL;
aoqi@0:     return unloaded_klass;
aoqi@0:   }
aoqi@0: 
aoqi@0:   Handle loader(THREAD, (oop)NULL);
aoqi@0:   Handle domain(THREAD, (oop)NULL);
aoqi@0:   if (accessing_klass != NULL) {
aoqi@0:     loader = Handle(THREAD, accessing_klass->loader());
aoqi@0:     domain = Handle(THREAD, accessing_klass->protection_domain());
aoqi@0:   }
aoqi@0: 
aoqi@0:   // setup up the proper type to return on OOM
aoqi@0:   ciKlass* fail_type;
aoqi@0:   if (sym->byte_at(0) == '[') {
aoqi@0:     fail_type = _unloaded_ciobjarrayklass;
aoqi@0:   } else {
aoqi@0:     fail_type = _unloaded_ciinstance_klass;
aoqi@0:   }
aoqi@0:   KlassHandle found_klass;
aoqi@0:   {
aoqi@0:     ttyUnlocker ttyul;  // release tty lock to avoid ordering problems
aoqi@0:     MutexLocker ml(Compile_lock);
aoqi@0:     Klass* kls;
aoqi@0:     if (!require_local) {
aoqi@0:       kls = SystemDictionary::find_constrained_instance_or_array_klass(sym, loader,
aoqi@0:                                                                        KILL_COMPILE_ON_FATAL_(fail_type));
aoqi@0:     } else {
aoqi@0:       kls = SystemDictionary::find_instance_or_array_klass(sym, loader, domain,
aoqi@0:                                                            KILL_COMPILE_ON_FATAL_(fail_type));
aoqi@0:     }
aoqi@0:     found_klass = KlassHandle(THREAD, kls);
aoqi@0:   }
aoqi@0: 
aoqi@0:   // If we fail to find an array klass, look again for its element type.
aoqi@0:   // The element type may be available either locally or via constraints.
aoqi@0:   // In either case, if we can find the element type in the system dictionary,
aoqi@0:   // we must build an array type around it.  The CI requires array klasses
aoqi@0:   // to be loaded if their element klasses are loaded, except when memory
aoqi@0:   // is exhausted.
aoqi@0:   if (sym->byte_at(0) == '[' &&
aoqi@0:       (sym->byte_at(1) == '[' || sym->byte_at(1) == 'L')) {
aoqi@0:     // We have an unloaded array.
aoqi@0:     // Build it on the fly if the element class exists.
aoqi@0:     TempNewSymbol elem_sym = SymbolTable::new_symbol(sym->as_utf8()+1,
aoqi@0:                                                  sym->utf8_length()-1,
aoqi@0:                                                  KILL_COMPILE_ON_FATAL_(fail_type));
aoqi@0: 
aoqi@0:     // Get element ciKlass recursively.
aoqi@0:     ciKlass* elem_klass =
aoqi@0:       get_klass_by_name_impl(accessing_klass,
aoqi@0:                              cpool,
aoqi@0:                              get_symbol(elem_sym),
aoqi@0:                              require_local);
aoqi@0:     if (elem_klass != NULL && elem_klass->is_loaded()) {
aoqi@0:       // Now make an array for it
aoqi@0:       return ciObjArrayKlass::make_impl(elem_klass);
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   if (found_klass() == NULL && !cpool.is_null() && cpool->has_preresolution()) {
aoqi@0:     // Look inside the constant pool for pre-resolved class entries.
aoqi@0:     for (int i = cpool->length() - 1; i >= 1; i--) {
aoqi@0:       if (cpool->tag_at(i).is_klass()) {
aoqi@0:         Klass* kls = cpool->resolved_klass_at(i);
aoqi@0:         if (kls->name() == sym) {
aoqi@0:           found_klass = KlassHandle(THREAD, kls);
aoqi@0:           break;
aoqi@0:         }
aoqi@0:       }
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   if (found_klass() != NULL) {
aoqi@0:     // Found it.  Build a CI handle.
aoqi@0:     return get_klass(found_klass());
aoqi@0:   }
aoqi@0: 
aoqi@0:   if (require_local)  return NULL;
aoqi@0: 
aoqi@0:   // Not yet loaded into the VM, or not governed by loader constraints.
aoqi@0:   // Make a CI representative for it.
aoqi@0:   return get_unloaded_klass(accessing_klass, name);
aoqi@0: }
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // ciEnv::get_klass_by_name
aoqi@0: ciKlass* ciEnv::get_klass_by_name(ciKlass* accessing_klass,
aoqi@0:                                   ciSymbol* klass_name,
aoqi@0:                                   bool require_local) {
aoqi@0:   GUARDED_VM_ENTRY(return get_klass_by_name_impl(accessing_klass,
aoqi@0:                                                  constantPoolHandle(),
aoqi@0:                                                  klass_name,
aoqi@0:                                                  require_local);)
aoqi@0: }
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // ciEnv::get_klass_by_index_impl
aoqi@0: //
aoqi@0: // Implementation of get_klass_by_index.
aoqi@0: ciKlass* ciEnv::get_klass_by_index_impl(constantPoolHandle cpool,
aoqi@0:                                         int index,
aoqi@0:                                         bool& is_accessible,
aoqi@0:                                         ciInstanceKlass* accessor) {
aoqi@0:   EXCEPTION_CONTEXT;
aoqi@0:   KlassHandle klass; // = NULL;
aoqi@0:   Symbol* klass_name = NULL;
aoqi@0: 
aoqi@0:   if (cpool->tag_at(index).is_symbol()) {
aoqi@0:     klass_name = cpool->symbol_at(index);
aoqi@0:   } else {
aoqi@0:     // Check if it's resolved if it's not a symbol constant pool entry.
aoqi@0:     klass = KlassHandle(THREAD, ConstantPool::klass_at_if_loaded(cpool, index));
aoqi@0: 
aoqi@0:   if (klass.is_null()) {
aoqi@0:     // The klass has not been inserted into the constant pool.
aoqi@0:     // Try to look it up by name.
aoqi@0:     {
aoqi@0:       // We have to lock the cpool to keep the oop from being resolved
aoqi@0:       // while we are accessing it.
aoqi@0:         MonitorLockerEx ml(cpool->lock());
aoqi@0:       constantTag tag = cpool->tag_at(index);
aoqi@0:       if (tag.is_klass()) {
aoqi@0:         // The klass has been inserted into the constant pool
aoqi@0:         // very recently.
aoqi@0:         klass = KlassHandle(THREAD, cpool->resolved_klass_at(index));
aoqi@0:       } else {
aoqi@0:         assert(cpool->tag_at(index).is_unresolved_klass(), "wrong tag");
aoqi@0:         klass_name = cpool->unresolved_klass_at(index);
aoqi@0:       }
aoqi@0:     }
aoqi@0:   }
aoqi@0:   }
aoqi@0: 
aoqi@0:   if (klass.is_null()) {
aoqi@0:     // Not found in constant pool.  Use the name to do the lookup.
aoqi@0:     ciKlass* k = get_klass_by_name_impl(accessor,
aoqi@0:                                         cpool,
aoqi@0:                                         get_symbol(klass_name),
aoqi@0:                                         false);
aoqi@0:     // Calculate accessibility the hard way.
aoqi@0:     if (!k->is_loaded()) {
aoqi@0:       is_accessible = false;
aoqi@0:     } else if (k->loader() != accessor->loader() &&
aoqi@0:                get_klass_by_name_impl(accessor, cpool, k->name(), true) == NULL) {
aoqi@0:       // Loaded only remotely.  Not linked yet.
aoqi@0:       is_accessible = false;
aoqi@0:     } else {
aoqi@0:       // Linked locally, and we must also check public/private, etc.
aoqi@0:       is_accessible = check_klass_accessibility(accessor, k->get_Klass());
aoqi@0:     }
aoqi@0:     return k;
aoqi@0:   }
aoqi@0: 
aoqi@0:   // Check for prior unloaded klass.  The SystemDictionary's answers
aoqi@0:   // can vary over time but the compiler needs consistency.
aoqi@0:   ciSymbol* name = get_symbol(klass()->name());
aoqi@0:   ciKlass* unloaded_klass = check_get_unloaded_klass(accessor, name);
aoqi@0:   if (unloaded_klass != NULL) {
aoqi@0:     is_accessible = false;
aoqi@0:     return unloaded_klass;
aoqi@0:   }
aoqi@0: 
aoqi@0:   // It is known to be accessible, since it was found in the constant pool.
aoqi@0:   is_accessible = true;
aoqi@0:   return get_klass(klass());
aoqi@0: }
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // ciEnv::get_klass_by_index
aoqi@0: //
aoqi@0: // Get a klass from the constant pool.
aoqi@0: ciKlass* ciEnv::get_klass_by_index(constantPoolHandle cpool,
aoqi@0:                                    int index,
aoqi@0:                                    bool& is_accessible,
aoqi@0:                                    ciInstanceKlass* accessor) {
aoqi@0:   GUARDED_VM_ENTRY(return get_klass_by_index_impl(cpool, index, is_accessible, accessor);)
aoqi@0: }
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // ciEnv::get_constant_by_index_impl
aoqi@0: //
aoqi@0: // Implementation of get_constant_by_index().
aoqi@0: ciConstant ciEnv::get_constant_by_index_impl(constantPoolHandle cpool,
aoqi@0:                                              int pool_index, int cache_index,
aoqi@0:                                              ciInstanceKlass* accessor) {
aoqi@0:   bool ignore_will_link;
aoqi@0:   EXCEPTION_CONTEXT;
aoqi@0:   int index = pool_index;
aoqi@0:   if (cache_index >= 0) {
aoqi@0:     assert(index < 0, "only one kind of index at a time");
aoqi@0:     oop obj = cpool->resolved_references()->obj_at(cache_index);
aoqi@0:     if (obj != NULL) {
aoqi@0:       ciObject* ciobj = get_object(obj);
vlivanov@7288:       if (ciobj->is_array()) {
vlivanov@7288:         return ciConstant(T_ARRAY, ciobj);
vlivanov@7288:       } else {
vlivanov@7288:         assert(ciobj->is_instance(), "should be an instance");
vlivanov@7288:         return ciConstant(T_OBJECT, ciobj);
vlivanov@7288:       }
aoqi@0:     }
aoqi@0:     index = cpool->object_to_cp_index(cache_index);
aoqi@0:   }
aoqi@0:   constantTag tag = cpool->tag_at(index);
aoqi@0:   if (tag.is_int()) {
aoqi@0:     return ciConstant(T_INT, (jint)cpool->int_at(index));
aoqi@0:   } else if (tag.is_long()) {
aoqi@0:     return ciConstant((jlong)cpool->long_at(index));
aoqi@0:   } else if (tag.is_float()) {
aoqi@0:     return ciConstant((jfloat)cpool->float_at(index));
aoqi@0:   } else if (tag.is_double()) {
aoqi@0:     return ciConstant((jdouble)cpool->double_at(index));
aoqi@0:   } else if (tag.is_string()) {
aoqi@0:     oop string = NULL;
aoqi@0:     assert(cache_index >= 0, "should have a cache index");
aoqi@0:     if (cpool->is_pseudo_string_at(index)) {
aoqi@0:       string = cpool->pseudo_string_at(index, cache_index);
aoqi@0:     } else {
aoqi@0:       string = cpool->string_at(index, cache_index, THREAD);
aoqi@0:       if (HAS_PENDING_EXCEPTION) {
aoqi@0:         CLEAR_PENDING_EXCEPTION;
aoqi@0:         record_out_of_memory_failure();
aoqi@0:         return ciConstant();
aoqi@0:       }
aoqi@0:     }
aoqi@0:     ciObject* constant = get_object(string);
vlivanov@7288:     if (constant->is_array()) {
vlivanov@7288:       return ciConstant(T_ARRAY, constant);
vlivanov@7288:     } else {
vlivanov@7288:       assert (constant->is_instance(), "must be an instance, or not? ");
vlivanov@7288:       return ciConstant(T_OBJECT, constant);
vlivanov@7288:     }
aoqi@0:   } else if (tag.is_klass() || tag.is_unresolved_klass()) {
aoqi@0:     // 4881222: allow ldc to take a class type
aoqi@0:     ciKlass* klass = get_klass_by_index_impl(cpool, index, ignore_will_link, accessor);
aoqi@0:     if (HAS_PENDING_EXCEPTION) {
aoqi@0:       CLEAR_PENDING_EXCEPTION;
aoqi@0:       record_out_of_memory_failure();
aoqi@0:       return ciConstant();
aoqi@0:     }
aoqi@0:     assert (klass->is_instance_klass() || klass->is_array_klass(),
aoqi@0:             "must be an instance or array klass ");
aoqi@0:     return ciConstant(T_OBJECT, klass->java_mirror());
aoqi@0:   } else if (tag.is_method_type()) {
aoqi@0:     // must execute Java code to link this CP entry into cache[i].f1
aoqi@0:     ciSymbol* signature = get_symbol(cpool->method_type_signature_at(index));
aoqi@0:     ciObject* ciobj = get_unloaded_method_type_constant(signature);
aoqi@0:     return ciConstant(T_OBJECT, ciobj);
aoqi@0:   } else if (tag.is_method_handle()) {
aoqi@0:     // must execute Java code to link this CP entry into cache[i].f1
aoqi@0:     int ref_kind        = cpool->method_handle_ref_kind_at(index);
aoqi@0:     int callee_index    = cpool->method_handle_klass_index_at(index);
aoqi@0:     ciKlass* callee     = get_klass_by_index_impl(cpool, callee_index, ignore_will_link, accessor);
aoqi@0:     ciSymbol* name      = get_symbol(cpool->method_handle_name_ref_at(index));
aoqi@0:     ciSymbol* signature = get_symbol(cpool->method_handle_signature_ref_at(index));
aoqi@0:     ciObject* ciobj     = get_unloaded_method_handle_constant(callee, name, signature, ref_kind);
aoqi@0:     return ciConstant(T_OBJECT, ciobj);
aoqi@0:   } else {
aoqi@0:     ShouldNotReachHere();
aoqi@0:     return ciConstant();
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // ciEnv::get_constant_by_index
aoqi@0: //
aoqi@0: // Pull a constant out of the constant pool.  How appropriate.
aoqi@0: //
aoqi@0: // Implementation note: this query is currently in no way cached.
aoqi@0: ciConstant ciEnv::get_constant_by_index(constantPoolHandle cpool,
aoqi@0:                                         int pool_index, int cache_index,
aoqi@0:                                         ciInstanceKlass* accessor) {
aoqi@0:   GUARDED_VM_ENTRY(return get_constant_by_index_impl(cpool, pool_index, cache_index, accessor);)
aoqi@0: }
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // ciEnv::get_field_by_index_impl
aoqi@0: //
aoqi@0: // Implementation of get_field_by_index.
aoqi@0: //
aoqi@0: // Implementation note: the results of field lookups are cached
aoqi@0: // in the accessor klass.
aoqi@0: ciField* ciEnv::get_field_by_index_impl(ciInstanceKlass* accessor,
aoqi@0:                                         int index) {
aoqi@0:   ciConstantPoolCache* cache = accessor->field_cache();
aoqi@0:   if (cache == NULL) {
aoqi@0:     ciField* field = new (arena()) ciField(accessor, index);
aoqi@0:     return field;
aoqi@0:   } else {
aoqi@0:     ciField* field = (ciField*)cache->get(index);
aoqi@0:     if (field == NULL) {
aoqi@0:       field = new (arena()) ciField(accessor, index);
aoqi@0:       cache->insert(index, field);
aoqi@0:     }
aoqi@0:     return field;
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // ciEnv::get_field_by_index
aoqi@0: //
aoqi@0: // Get a field by index from a klass's constant pool.
aoqi@0: ciField* ciEnv::get_field_by_index(ciInstanceKlass* accessor,
aoqi@0:                                    int index) {
aoqi@0:   GUARDED_VM_ENTRY(return get_field_by_index_impl(accessor, index);)
aoqi@0: }
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // ciEnv::lookup_method
aoqi@0: //
aoqi@0: // Perform an appropriate method lookup based on accessor, holder,
aoqi@0: // name, signature, and bytecode.
aoqi@0: Method* ciEnv::lookup_method(InstanceKlass*  accessor,
aoqi@0:                                InstanceKlass*  holder,
aoqi@0:                                Symbol*       name,
aoqi@0:                                Symbol*       sig,
aoqi@0:                                Bytecodes::Code bc) {
aoqi@0:   EXCEPTION_CONTEXT;
aoqi@0:   KlassHandle h_accessor(THREAD, accessor);
aoqi@0:   KlassHandle h_holder(THREAD, holder);
aoqi@0:   LinkResolver::check_klass_accessability(h_accessor, h_holder, KILL_COMPILE_ON_FATAL_(NULL));
aoqi@0:   methodHandle dest_method;
aoqi@0:   switch (bc) {
aoqi@0:   case Bytecodes::_invokestatic:
aoqi@0:     dest_method =
aoqi@0:       LinkResolver::resolve_static_call_or_null(h_holder, name, sig, h_accessor);
aoqi@0:     break;
aoqi@0:   case Bytecodes::_invokespecial:
aoqi@0:     dest_method =
aoqi@0:       LinkResolver::resolve_special_call_or_null(h_holder, name, sig, h_accessor);
aoqi@0:     break;
aoqi@0:   case Bytecodes::_invokeinterface:
aoqi@0:     dest_method =
aoqi@0:       LinkResolver::linktime_resolve_interface_method_or_null(h_holder, name, sig,
aoqi@0:                                                               h_accessor, true);
aoqi@0:     break;
aoqi@0:   case Bytecodes::_invokevirtual:
aoqi@0:     dest_method =
aoqi@0:       LinkResolver::linktime_resolve_virtual_method_or_null(h_holder, name, sig,
aoqi@0:                                                             h_accessor, true);
aoqi@0:     break;
aoqi@0:   default: ShouldNotReachHere();
aoqi@0:   }
aoqi@0: 
aoqi@0:   return dest_method();
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // ciEnv::get_method_by_index_impl
aoqi@0: ciMethod* ciEnv::get_method_by_index_impl(constantPoolHandle cpool,
aoqi@0:                                           int index, Bytecodes::Code bc,
aoqi@0:                                           ciInstanceKlass* accessor) {
aoqi@0:   if (bc == Bytecodes::_invokedynamic) {
aoqi@0:     ConstantPoolCacheEntry* cpce = cpool->invokedynamic_cp_cache_entry_at(index);
aoqi@0:     bool is_resolved = !cpce->is_f1_null();
aoqi@0:     // FIXME: code generation could allow for null (unlinked) call site
aoqi@0:     // The call site could be made patchable as follows:
aoqi@0:     // Load the appendix argument from the constant pool.
aoqi@0:     // Test the appendix argument and jump to a known deopt routine if it is null.
aoqi@0:     // Jump through a patchable call site, which is initially a deopt routine.
aoqi@0:     // Patch the call site to the nmethod entry point of the static compiled lambda form.
aoqi@0:     // As with other two-component call sites, both values must be independently verified.
aoqi@0: 
aoqi@0:     if (is_resolved) {
aoqi@0:       // Get the invoker Method* from the constant pool.
aoqi@0:       // (The appendix argument, if any, will be noted in the method's signature.)
aoqi@0:       Method* adapter = cpce->f1_as_method();
aoqi@0:       return get_method(adapter);
aoqi@0:     }
aoqi@0: 
aoqi@0:     // Fake a method that is equivalent to a declared method.
aoqi@0:     ciInstanceKlass* holder    = get_instance_klass(SystemDictionary::MethodHandle_klass());
aoqi@0:     ciSymbol*        name      = ciSymbol::invokeBasic_name();
aoqi@0:     ciSymbol*        signature = get_symbol(cpool->signature_ref_at(index));
aoqi@0:     return get_unloaded_method(holder, name, signature, accessor);
aoqi@0:   } else {
aoqi@0:     const int holder_index = cpool->klass_ref_index_at(index);
aoqi@0:     bool holder_is_accessible;
aoqi@0:     ciKlass* holder = get_klass_by_index_impl(cpool, holder_index, holder_is_accessible, accessor);
aoqi@0:     ciInstanceKlass* declared_holder = get_instance_klass_for_declared_method_holder(holder);
aoqi@0: 
aoqi@0:     // Get the method's name and signature.
aoqi@0:     Symbol* name_sym = cpool->name_ref_at(index);
aoqi@0:     Symbol* sig_sym  = cpool->signature_ref_at(index);
aoqi@0: 
aoqi@0:     if (cpool->has_preresolution()
aoqi@0:         || (holder == ciEnv::MethodHandle_klass() &&
aoqi@0:             MethodHandles::is_signature_polymorphic_name(holder->get_Klass(), name_sym))) {
aoqi@0:       // Short-circuit lookups for JSR 292-related call sites.
aoqi@0:       // That is, do not rely only on name-based lookups, because they may fail
aoqi@0:       // if the names are not resolvable in the boot class loader (7056328).
aoqi@0:       switch (bc) {
aoqi@0:       case Bytecodes::_invokevirtual:
aoqi@0:       case Bytecodes::_invokeinterface:
aoqi@0:       case Bytecodes::_invokespecial:
aoqi@0:       case Bytecodes::_invokestatic:
aoqi@0:         {
aoqi@0:           Method* m = ConstantPool::method_at_if_loaded(cpool, index);
aoqi@0:           if (m != NULL) {
aoqi@0:             return get_method(m);
aoqi@0:           }
aoqi@0:         }
aoqi@0:         break;
aoqi@0:       }
aoqi@0:     }
aoqi@0: 
aoqi@0:     if (holder_is_accessible) {  // Our declared holder is loaded.
aoqi@0:       InstanceKlass* lookup = declared_holder->get_instanceKlass();
aoqi@0:       Method* m = lookup_method(accessor->get_instanceKlass(), lookup, name_sym, sig_sym, bc);
aoqi@0:       if (m != NULL &&
aoqi@0:           (bc == Bytecodes::_invokestatic
aoqi@0:            ?  m->method_holder()->is_not_initialized()
aoqi@0:            : !m->method_holder()->is_loaded())) {
aoqi@0:         m = NULL;
aoqi@0:       }
aoqi@0: #ifdef ASSERT
aoqi@0:       if (m != NULL && ReplayCompiles && !ciReplay::is_loaded(m)) {
aoqi@0:         m = NULL;
aoqi@0:       }
aoqi@0: #endif
aoqi@0:       if (m != NULL) {
aoqi@0:         // We found the method.
aoqi@0:         return get_method(m);
aoqi@0:       }
aoqi@0:     }
aoqi@0: 
aoqi@0:     // Either the declared holder was not loaded, or the method could
aoqi@0:     // not be found.  Create a dummy ciMethod to represent the failed
aoqi@0:     // lookup.
aoqi@0:     ciSymbol* name      = get_symbol(name_sym);
aoqi@0:     ciSymbol* signature = get_symbol(sig_sym);
aoqi@0:     return get_unloaded_method(declared_holder, name, signature, accessor);
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // ciEnv::get_instance_klass_for_declared_method_holder
aoqi@0: ciInstanceKlass* ciEnv::get_instance_klass_for_declared_method_holder(ciKlass* method_holder) {
aoqi@0:   // For the case of <array>.clone(), the method holder can be a ciArrayKlass
aoqi@0:   // instead of a ciInstanceKlass.  For that case simply pretend that the
aoqi@0:   // declared holder is Object.clone since that's where the call will bottom out.
aoqi@0:   // A more correct fix would trickle out through many interfaces in CI,
aoqi@0:   // requiring ciInstanceKlass* to become ciKlass* and many more places would
aoqi@0:   // require checks to make sure the expected type was found.  Given that this
aoqi@0:   // only occurs for clone() the more extensive fix seems like overkill so
aoqi@0:   // instead we simply smear the array type into Object.
aoqi@0:   guarantee(method_holder != NULL, "no method holder");
aoqi@0:   if (method_holder->is_instance_klass()) {
aoqi@0:     return method_holder->as_instance_klass();
aoqi@0:   } else if (method_holder->is_array_klass()) {
aoqi@0:     return current()->Object_klass();
aoqi@0:   } else {
aoqi@0:     ShouldNotReachHere();
aoqi@0:   }
aoqi@0:   return NULL;
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // ciEnv::get_method_by_index
aoqi@0: ciMethod* ciEnv::get_method_by_index(constantPoolHandle cpool,
aoqi@0:                                      int index, Bytecodes::Code bc,
aoqi@0:                                      ciInstanceKlass* accessor) {
aoqi@0:   GUARDED_VM_ENTRY(return get_method_by_index_impl(cpool, index, bc, accessor);)
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // ciEnv::name_buffer
aoqi@0: char *ciEnv::name_buffer(int req_len) {
aoqi@0:   if (_name_buffer_len < req_len) {
aoqi@0:     if (_name_buffer == NULL) {
aoqi@0:       _name_buffer = (char*)arena()->Amalloc(sizeof(char)*req_len);
aoqi@0:       _name_buffer_len = req_len;
aoqi@0:     } else {
aoqi@0:       _name_buffer =
aoqi@0:         (char*)arena()->Arealloc(_name_buffer, _name_buffer_len, req_len);
aoqi@0:       _name_buffer_len = req_len;
aoqi@0:     }
aoqi@0:   }
aoqi@0:   return _name_buffer;
aoqi@0: }
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // ciEnv::is_in_vm
aoqi@0: bool ciEnv::is_in_vm() {
aoqi@0:   return JavaThread::current()->thread_state() == _thread_in_vm;
aoqi@0: }
aoqi@0: 
aoqi@0: bool ciEnv::system_dictionary_modification_counter_changed() {
aoqi@0:   return _system_dictionary_modification_counter != SystemDictionary::number_of_modifications();
aoqi@0: }
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // ciEnv::validate_compile_task_dependencies
aoqi@0: //
aoqi@0: // Check for changes during compilation (e.g. class loads, evolution,
aoqi@0: // breakpoints, call site invalidation).
aoqi@0: void ciEnv::validate_compile_task_dependencies(ciMethod* target) {
aoqi@0:   if (failing())  return;  // no need for further checks
aoqi@0: 
aoqi@0:   // First, check non-klass dependencies as we might return early and
aoqi@0:   // not check klass dependencies if the system dictionary
aoqi@0:   // modification counter hasn't changed (see below).
aoqi@0:   for (Dependencies::DepStream deps(dependencies()); deps.next(); ) {
aoqi@0:     if (deps.is_klass_type())  continue;  // skip klass dependencies
aoqi@0:     Klass* witness = deps.check_dependency();
aoqi@0:     if (witness != NULL) {
aoqi@0:       record_failure("invalid non-klass dependency");
aoqi@0:       return;
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   // Klass dependencies must be checked when the system dictionary
aoqi@0:   // changes.  If logging is enabled all violated dependences will be
aoqi@0:   // recorded in the log.  In debug mode check dependencies even if
aoqi@0:   // the system dictionary hasn't changed to verify that no invalid
aoqi@0:   // dependencies were inserted.  Any violated dependences in this
aoqi@0:   // case are dumped to the tty.
aoqi@0:   bool counter_changed = system_dictionary_modification_counter_changed();
aoqi@0: 
aoqi@0:   bool verify_deps = trueInDebug;
aoqi@0:   if (!counter_changed && !verify_deps)  return;
aoqi@0: 
aoqi@0:   int klass_violations = 0;
aoqi@0:   for (Dependencies::DepStream deps(dependencies()); deps.next(); ) {
aoqi@0:     if (!deps.is_klass_type())  continue;  // skip non-klass dependencies
aoqi@0:     Klass* witness = deps.check_dependency();
aoqi@0:     if (witness != NULL) {
aoqi@0:       klass_violations++;
aoqi@0:       if (!counter_changed) {
aoqi@0:         // Dependence failed but counter didn't change.  Log a message
aoqi@0:         // describing what failed and allow the assert at the end to
aoqi@0:         // trigger.
aoqi@0:         deps.print_dependency(witness);
aoqi@0:       } else if (xtty == NULL) {
aoqi@0:         // If we're not logging then a single violation is sufficient,
aoqi@0:         // otherwise we want to log all the dependences which were
aoqi@0:         // violated.
aoqi@0:         break;
aoqi@0:       }
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   if (klass_violations != 0) {
aoqi@0: #ifdef ASSERT
aoqi@0:     if (!counter_changed && !PrintCompilation) {
aoqi@0:       // Print out the compile task that failed
aoqi@0:       _task->print_line();
aoqi@0:     }
aoqi@0: #endif
aoqi@0:     assert(counter_changed, "failed dependencies, but counter didn't change");
aoqi@0:     record_failure("concurrent class loading");
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // ciEnv::register_method
aoqi@0: void ciEnv::register_method(ciMethod* target,
aoqi@0:                             int entry_bci,
aoqi@0:                             CodeOffsets* offsets,
aoqi@0:                             int orig_pc_offset,
aoqi@0:                             CodeBuffer* code_buffer,
aoqi@0:                             int frame_words,
aoqi@0:                             OopMapSet* oop_map_set,
aoqi@0:                             ExceptionHandlerTable* handler_table,
aoqi@0:                             ImplicitExceptionTable* inc_table,
aoqi@0:                             AbstractCompiler* compiler,
aoqi@0:                             int comp_level,
aoqi@0:                             bool has_unsafe_access,
aoqi@0:                             bool has_wide_vectors,
aoqi@0:                             RTMState  rtm_state) {
aoqi@0:   VM_ENTRY_MARK;
aoqi@0:   nmethod* nm = NULL;
aoqi@0:   {
aoqi@0:     // To prevent compile queue updates.
aoqi@0:     MutexLocker locker(MethodCompileQueue_lock, THREAD);
aoqi@0: 
aoqi@0:     // Prevent SystemDictionary::add_to_hierarchy from running
aoqi@0:     // and invalidating our dependencies until we install this method.
aoqi@0:     // No safepoints are allowed. Otherwise, class redefinition can occur in between.
aoqi@0:     MutexLocker ml(Compile_lock);
aoqi@0:     No_Safepoint_Verifier nsv;
aoqi@0: 
aoqi@0:     // Change in Jvmti state may invalidate compilation.
aoqi@0:     if (!failing() &&
aoqi@0:         ( (!jvmti_can_hotswap_or_post_breakpoint() &&
aoqi@0:            JvmtiExport::can_hotswap_or_post_breakpoint()) ||
aoqi@0:           (!jvmti_can_access_local_variables() &&
aoqi@0:            JvmtiExport::can_access_local_variables()) ||
aoqi@0:           (!jvmti_can_post_on_exceptions() &&
aoqi@0:            JvmtiExport::can_post_on_exceptions()) )) {
aoqi@0:       record_failure("Jvmti state change invalidated dependencies");
aoqi@0:     }
aoqi@0: 
aoqi@0:     // Change in DTrace flags may invalidate compilation.
aoqi@0:     if (!failing() &&
aoqi@0:         ( (!dtrace_extended_probes() && ExtendedDTraceProbes) ||
aoqi@0:           (!dtrace_method_probes() && DTraceMethodProbes) ||
aoqi@0:           (!dtrace_alloc_probes() && DTraceAllocProbes) )) {
aoqi@0:       record_failure("DTrace flags change invalidated dependencies");
aoqi@0:     }
aoqi@0: 
aoqi@0:     if (!failing()) {
aoqi@0:       if (log() != NULL) {
aoqi@0:         // Log the dependencies which this compilation declares.
aoqi@0:         dependencies()->log_all_dependencies();
aoqi@0:       }
aoqi@0: 
aoqi@0:       // Encode the dependencies now, so we can check them right away.
aoqi@0:       dependencies()->encode_content_bytes();
aoqi@0: 
aoqi@0:       // Check for {class loads, evolution, breakpoints, ...} during compilation
aoqi@0:       validate_compile_task_dependencies(target);
aoqi@0:     }
aoqi@0: 
aoqi@0:     methodHandle method(THREAD, target->get_Method());
aoqi@0: 
aoqi@0: #if INCLUDE_RTM_OPT
aoqi@0:     if (!failing() && (rtm_state != NoRTM) &&
aoqi@0:         (method()->method_data() != NULL) &&
aoqi@0:         (method()->method_data()->rtm_state() != rtm_state)) {
aoqi@0:       // Preemptive decompile if rtm state was changed.
aoqi@0:       record_failure("RTM state change invalidated rtm code");
aoqi@0:     }
aoqi@0: #endif
aoqi@0: 
aoqi@0:     if (failing()) {
aoqi@0:       // While not a true deoptimization, it is a preemptive decompile.
aoqi@0:       MethodData* mdo = method()->method_data();
aoqi@0:       if (mdo != NULL) {
aoqi@0:         mdo->inc_decompile_count();
aoqi@0:       }
aoqi@0: 
aoqi@0:       // All buffers in the CodeBuffer are allocated in the CodeCache.
aoqi@0:       // If the code buffer is created on each compile attempt
aoqi@0:       // as in C2, then it must be freed.
aoqi@0:       code_buffer->free_blob();
aoqi@0:       return;
aoqi@0:     }
aoqi@0: 
aoqi@0:     assert(offsets->value(CodeOffsets::Deopt) != -1, "must have deopt entry");
aoqi@0:     assert(offsets->value(CodeOffsets::Exceptions) != -1, "must have exception entry");
aoqi@0: 
aoqi@0:     nm =  nmethod::new_nmethod(method,
aoqi@0:                                compile_id(),
aoqi@0:                                entry_bci,
aoqi@0:                                offsets,
aoqi@0:                                orig_pc_offset,
aoqi@0:                                debug_info(), dependencies(), code_buffer,
aoqi@0:                                frame_words, oop_map_set,
aoqi@0:                                handler_table, inc_table,
aoqi@0:                                compiler, comp_level);
aoqi@0:     // Free codeBlobs
aoqi@0:     code_buffer->free_blob();
aoqi@0: 
aoqi@0:     if (nm != NULL) {
aoqi@0:       nm->set_has_unsafe_access(has_unsafe_access);
aoqi@0:       nm->set_has_wide_vectors(has_wide_vectors);
aoqi@0: #if INCLUDE_RTM_OPT
aoqi@0:       nm->set_rtm_state(rtm_state);
aoqi@0: #endif
aoqi@0: 
aoqi@0:       // Record successful registration.
aoqi@0:       // (Put nm into the task handle *before* publishing to the Java heap.)
aoqi@0:       if (task() != NULL) {
aoqi@0:         task()->set_code(nm);
aoqi@0:       }
aoqi@0: 
aoqi@0:       if (entry_bci == InvocationEntryBci) {
aoqi@0:         if (TieredCompilation) {
aoqi@0:           // If there is an old version we're done with it
aoqi@0:           nmethod* old = method->code();
aoqi@0:           if (TraceMethodReplacement && old != NULL) {
aoqi@0:             ResourceMark rm;
aoqi@0:             char *method_name = method->name_and_sig_as_C_string();
aoqi@0:             tty->print_cr("Replacing method %s", method_name);
aoqi@0:           }
aoqi@0:           if (old != NULL) {
aoqi@0:             old->make_not_entrant();
aoqi@0:           }
aoqi@0:         }
aoqi@0:         if (TraceNMethodInstalls) {
aoqi@0:           ResourceMark rm;
aoqi@0:           char *method_name = method->name_and_sig_as_C_string();
aoqi@0:           ttyLocker ttyl;
aoqi@0:           tty->print_cr("Installing method (%d) %s ",
aoqi@0:                         comp_level,
aoqi@0:                         method_name);
aoqi@0:         }
aoqi@0:         // Allow the code to be executed
aoqi@0:         method->set_code(method, nm);
aoqi@0:       } else {
aoqi@0:         if (TraceNMethodInstalls) {
aoqi@0:           ResourceMark rm;
aoqi@0:           char *method_name = method->name_and_sig_as_C_string();
aoqi@0:           ttyLocker ttyl;
aoqi@0:           tty->print_cr("Installing osr method (%d) %s @ %d",
aoqi@0:                         comp_level,
aoqi@0:                         method_name,
aoqi@0:                         entry_bci);
aoqi@0:         }
aoqi@0:         method->method_holder()->add_osr_nmethod(nm);
aoqi@0:       }
aoqi@0:     }
aoqi@0:   }  // safepoints are allowed again
aoqi@0: 
aoqi@0:   if (nm != NULL) {
aoqi@0:     // JVMTI -- compiled method notification (must be done outside lock)
aoqi@0:     nm->post_compiled_method_load_event();
aoqi@0:   } else {
aoqi@0:     // The CodeCache is full. Print out warning and disable compilation.
aoqi@0:     record_failure("code cache is full");
aoqi@0:     CompileBroker::handle_full_code_cache();
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // ciEnv::find_system_klass
aoqi@0: ciKlass* ciEnv::find_system_klass(ciSymbol* klass_name) {
aoqi@0:   VM_ENTRY_MARK;
aoqi@0:   return get_klass_by_name_impl(NULL, constantPoolHandle(), klass_name, false);
aoqi@0: }
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // ciEnv::comp_level
aoqi@0: int ciEnv::comp_level() {
aoqi@0:   if (task() == NULL)  return CompLevel_highest_tier;
aoqi@0:   return task()->comp_level();
aoqi@0: }
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // ciEnv::compile_id
aoqi@0: uint ciEnv::compile_id() {
aoqi@0:   if (task() == NULL)  return 0;
aoqi@0:   return task()->compile_id();
aoqi@0: }
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // ciEnv::notice_inlined_method()
aoqi@0: void ciEnv::notice_inlined_method(ciMethod* method) {
aoqi@0:   _num_inlined_bytecodes += method->code_size_for_inlining();
aoqi@0: }
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // ciEnv::num_inlined_bytecodes()
aoqi@0: int ciEnv::num_inlined_bytecodes() const {
aoqi@0:   return _num_inlined_bytecodes;
aoqi@0: }
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // ciEnv::record_failure()
aoqi@0: void ciEnv::record_failure(const char* reason) {
aoqi@0:   if (_failure_reason == NULL) {
aoqi@0:     // Record the first failure reason.
aoqi@0:     _failure_reason = reason;
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // ciEnv::record_method_not_compilable()
aoqi@0: void ciEnv::record_method_not_compilable(const char* reason, bool all_tiers) {
aoqi@0:   int new_compilable =
aoqi@0:     all_tiers ? MethodCompilable_never : MethodCompilable_not_at_tier ;
aoqi@0: 
aoqi@0:   // Only note transitions to a worse state
aoqi@0:   if (new_compilable > _compilable) {
aoqi@0:     if (log() != NULL) {
aoqi@0:       if (all_tiers) {
aoqi@0:         log()->elem("method_not_compilable");
aoqi@0:       } else {
aoqi@0:         log()->elem("method_not_compilable_at_tier level='%d'",
aoqi@0:                     current()->task()->comp_level());
aoqi@0:       }
aoqi@0:     }
aoqi@0:     _compilable = new_compilable;
aoqi@0: 
aoqi@0:     // Reset failure reason; this one is more important.
aoqi@0:     _failure_reason = NULL;
aoqi@0:     record_failure(reason);
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // ciEnv::record_out_of_memory_failure()
aoqi@0: void ciEnv::record_out_of_memory_failure() {
aoqi@0:   // If memory is low, we stop compiling methods.
aoqi@0:   record_method_not_compilable("out of memory");
aoqi@0: }
aoqi@0: 
aoqi@0: ciInstance* ciEnv::unloaded_ciinstance() {
aoqi@0:   GUARDED_VM_ENTRY(return _factory->get_unloaded_object_constant();)
aoqi@0: }
aoqi@0: 
aoqi@0: // ------------------------------------------------------------------
aoqi@0: // ciEnv::dump_replay_data*
aoqi@0: 
aoqi@0: // Don't change thread state and acquire any locks.
aoqi@0: // Safe to call from VM error reporter.
aoqi@0: 
aoqi@0: void ciEnv::dump_compile_data(outputStream* out) {
aoqi@0:   CompileTask* task = this->task();
aoqi@0:   Method* method = task->method();
aoqi@0:   int entry_bci = task->osr_bci();
aoqi@0:   int comp_level = task->comp_level();
aoqi@0:   out->print("compile %s %s %s %d %d",
aoqi@0:                 method->klass_name()->as_quoted_ascii(),
aoqi@0:                 method->name()->as_quoted_ascii(),
aoqi@0:                 method->signature()->as_quoted_ascii(),
aoqi@0:                 entry_bci, comp_level);
aoqi@0:   if (compiler_data() != NULL) {
aoqi@0:     if (is_c2_compile(comp_level)) { // C2 or Shark
aoqi@0: #ifdef COMPILER2
aoqi@0:       // Dump C2 inlining data.
aoqi@0:       ((Compile*)compiler_data())->dump_inline_data(out);
aoqi@0: #endif
aoqi@0:     } else if (is_c1_compile(comp_level)) { // C1
aoqi@0: #ifdef COMPILER1
aoqi@0:       // Dump C1 inlining data.
aoqi@0:       ((Compilation*)compiler_data())->dump_inline_data(out);
aoqi@0: #endif
aoqi@0:     }
aoqi@0:   }
aoqi@0:   out->cr();
aoqi@0: }
aoqi@0: 
aoqi@0: void ciEnv::dump_replay_data_unsafe(outputStream* out) {
aoqi@0:   ResourceMark rm;
aoqi@0: #if INCLUDE_JVMTI
aoqi@0:   out->print_cr("JvmtiExport can_access_local_variables %d",     _jvmti_can_access_local_variables);
aoqi@0:   out->print_cr("JvmtiExport can_hotswap_or_post_breakpoint %d", _jvmti_can_hotswap_or_post_breakpoint);
aoqi@0:   out->print_cr("JvmtiExport can_post_on_exceptions %d",         _jvmti_can_post_on_exceptions);
aoqi@0: #endif // INCLUDE_JVMTI
aoqi@0: 
aoqi@0:   GrowableArray<ciMetadata*>* objects = _factory->get_ci_metadata();
aoqi@0:   out->print_cr("# %d ciObject found", objects->length());
aoqi@0:   for (int i = 0; i < objects->length(); i++) {
aoqi@0:     objects->at(i)->dump_replay_data(out);
aoqi@0:   }
aoqi@0:   dump_compile_data(out);
aoqi@0:   out->flush();
aoqi@0: }
aoqi@0: 
aoqi@0: void ciEnv::dump_replay_data(outputStream* out) {
aoqi@0:   GUARDED_VM_ENTRY(
aoqi@0:     MutexLocker ml(Compile_lock);
aoqi@0:     dump_replay_data_unsafe(out);
aoqi@0:   )
aoqi@0: }
aoqi@0: 
aoqi@0: void ciEnv::dump_replay_data(int compile_id) {
aoqi@0:   static char buffer[O_BUFLEN];
aoqi@0:   int ret = jio_snprintf(buffer, O_BUFLEN, "replay_pid%p_compid%d.log", os::current_process_id(), compile_id);
aoqi@0:   if (ret > 0) {
aoqi@0:     int fd = open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
aoqi@0:     if (fd != -1) {
aoqi@0:       FILE* replay_data_file = os::open(fd, "w");
aoqi@0:       if (replay_data_file != NULL) {
aoqi@0:         fileStream replay_data_stream(replay_data_file, /*need_close=*/true);
aoqi@0:         dump_replay_data(&replay_data_stream);
aoqi@0:         tty->print_cr("# Compiler replay data is saved as: %s", buffer);
aoqi@0:       } else {
aoqi@0:         tty->print_cr("# Can't open file to dump replay data.");
aoqi@0:       }
aoqi@0:     }
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: void ciEnv::dump_inline_data(int compile_id) {
aoqi@0:   static char buffer[O_BUFLEN];
aoqi@0:   int ret = jio_snprintf(buffer, O_BUFLEN, "inline_pid%p_compid%d.log", os::current_process_id(), compile_id);
aoqi@0:   if (ret > 0) {
aoqi@0:     int fd = open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
aoqi@0:     if (fd != -1) {
aoqi@0:       FILE* inline_data_file = os::open(fd, "w");
aoqi@0:       if (inline_data_file != NULL) {
aoqi@0:         fileStream replay_data_stream(inline_data_file, /*need_close=*/true);
aoqi@0:         GUARDED_VM_ENTRY(
aoqi@0:           MutexLocker ml(Compile_lock);
aoqi@0:           dump_compile_data(&replay_data_stream);
aoqi@0:         )
aoqi@0:         replay_data_stream.flush();
aoqi@0:         tty->print("# Compiler inline data is saved as: ");
aoqi@0:         tty->print_cr("%s", buffer);
aoqi@0:       } else {
aoqi@0:         tty->print_cr("# Can't open file to dump inline data.");
aoqi@0:       }
aoqi@0:     }
aoqi@0:   }
aoqi@0: }