1 /*

     2  * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 #include "precompiled.hpp"

    25 #include "classfile/systemDictionary.hpp"

    26 #include "gc/shared/collectedHeap.hpp"

    27 #include "gc/shared/oopStorage.inline.hpp"

    28 #include "jvmci/jvmci.hpp"

    29 #include "jvmci/jvmci_globals.hpp"

    30 #include "jvmci/jvmciJavaClasses.hpp"

    31 #include "jvmci/jvmciRuntime.hpp"

    32 #include "jvmci/metadataHandleBlock.hpp"

    33 

    34 OopStorage* JVMCI::_object_handles = NULL;

    35 MetadataHandleBlock* JVMCI::_metadata_handles = NULL;

    36 JVMCIRuntime* JVMCI::_compiler_runtime = NULL;

    37 JVMCIRuntime* JVMCI::_java_runtime = NULL;

    38 

    39 bool JVMCI::can_initialize_JVMCI() {

    40   // Initializing JVMCI requires the module system to be initialized past phase 3.

    41   // The JVMCI API itself isn't available until phase 2 and ServiceLoader (which

    42   // JVMCI initialization requires) isn't usable until after phase 3. Testing

    43   // whether the system loader is initialized satisfies all these invariants.

    44   if (SystemDictionary::java_system_loader() == NULL) {

    45     return false;

    46   }

    47   assert(Universe::is_module_initialized(), "must be");

    48   return true;

    49 }

    50 

    51 void JVMCI::initialize_compiler(TRAPS) {

    52   if (JVMCILibDumpJNIConfig) {

    53     JNIJVMCI::initialize_ids(NULL);

    54     ShouldNotReachHere();

    55   }

    56 

    57   JVMCI::compiler_runtime()->call_getCompiler(CHECK);

    58 }

    59 

    60 void JVMCI::initialize_globals() {

    61   _object_handles = new OopStorage("JVMCI Global Oop Handles",

    62                                    JVMCIGlobalAlloc_lock,

    63                                    JVMCIGlobalActive_lock);

    64   _metadata_handles = MetadataHandleBlock::allocate_block();

    65   if (UseJVMCINativeLibrary) {

    66     // There are two runtimes.

    67     _compiler_runtime = new JVMCIRuntime();

    68     _java_runtime = new JVMCIRuntime();

    69   } else {

    70     // There is only a single runtime

    71     _java_runtime = _compiler_runtime = new JVMCIRuntime();

    72   }

    73 }

    74 

    75 OopStorage* JVMCI::object_handles() {

    76   assert(_object_handles != NULL, "Uninitialized");

    77   return _object_handles;

    78 }

    79 

    80 jobject JVMCI::make_global(const Handle& obj) {

    81   assert(!Universe::heap()->is_gc_active(), "can't extend the root set during GC");

    82   assert(oopDesc::is_oop(obj()), "not an oop");

    83   oop* ptr = object_handles()->allocate();

    84   jobject res = NULL;

    85   if (ptr != NULL) {

    86     assert(*ptr == NULL, "invariant");

    87     NativeAccess<>::oop_store(ptr, obj());

    88     res = reinterpret_cast<jobject>(ptr);

    89   } else {

    90     vm_exit_out_of_memory(sizeof(oop), OOM_MALLOC_ERROR,

    91                           "Cannot create JVMCI oop handle");

    92   }

    93   return res;

    94 }

    95 

    96 bool JVMCI::is_global_handle(jobject handle) {

    97   const oop* ptr = reinterpret_cast<oop*>(handle);

    98   return object_handles()->allocation_status(ptr) == OopStorage::ALLOCATED_ENTRY;

    99 }

   100 

   101 jmetadata JVMCI::allocate_handle(const methodHandle& handle) {

   102   assert(_metadata_handles != NULL, "uninitialized");

   103   MutexLocker ml(JVMCI_lock);

   104   return _metadata_handles->allocate_handle(handle);

   105 }

   106 

   107 jmetadata JVMCI::allocate_handle(const constantPoolHandle& handle) {

   108   assert(_metadata_handles != NULL, "uninitialized");

   109   MutexLocker ml(JVMCI_lock);

   110   return _metadata_handles->allocate_handle(handle);

   111 }

   112 

   113 void JVMCI::release_handle(jmetadata handle) {

   114   MutexLocker ml(JVMCI_lock);

   115   _metadata_handles->chain_free_list(handle);

   116 }

   117 

   118 void JVMCI::oops_do(OopClosure* f) {

   119   if (_object_handles != NULL) {

   120     _object_handles->oops_do(f);

   121   }

   122 }

   123 

   124 void JVMCI::metadata_do(void f(Metadata*)) {

   125   if (_metadata_handles != NULL) {

   126     _metadata_handles->metadata_do(f);

   127   }

   128 }

   129 

   130 void JVMCI::do_unloading(bool unloading_occurred) {

   131   if (_metadata_handles != NULL && unloading_occurred) {

   132     _metadata_handles->do_unloading();

   133   }

   134 }

   135 

   136 bool JVMCI::is_compiler_initialized() {

   137   return compiler_runtime()->is_HotSpotJVMCIRuntime_initialized();

   138 }

   139 

   140 void JVMCI::shutdown() {

   141   if (compiler_runtime() != NULL) {

   142     compiler_runtime()->shutdown();

   143   }

   144 }

   145 

   146 bool JVMCI::shutdown_called() {

   147   if (compiler_runtime() != NULL) {

   148     return compiler_runtime()->shutdown_called();

   149   }

   150   return false;

   151 }