1 /*
   2  * Copyright (c) 2017, 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 #ifndef SHARE_JVMCI_JVMCI_HPP
  25 #define SHARE_JVMCI_JVMCI_HPP
  26 
  27 #include "compiler/compilerDefinitions.hpp"
  28 #include "utilities/exceptions.hpp"
  29 
  30 class BoolObjectClosure;
  31 class constantPoolHandle;
  32 class JavaThread;
  33 class JVMCIEnv;
  34 class JVMCIRuntime;
  35 class Metadata;
  36 class MetadataHandleBlock;
  37 class OopClosure;
  38 class OopStorage;
  39 
  40 struct _jmetadata;
  41 typedef struct _jmetadata *jmetadata;
  42 
  43 class JVMCI : public AllStatic {
  44   friend class JVMCIRuntime;
  45   friend class JVMCIEnv;
  46 
  47  private:
  48   // Handles to objects in the HotSpot heap.
  49   static OopStorage* _object_handles;
  50 
  51   static OopStorage* object_handles();
  52 
  53   // Handles to Metadata objects.
  54   static MetadataHandleBlock* _metadata_handles;
  55 
  56   // Access to the HotSpotJVMCIRuntime used by the CompileBroker.
  57   static JVMCIRuntime* _compiler_runtime;
  58 
  59   // Access to the HotSpotJVMCIRuntime used by Java code running on the
  60   // HotSpot heap. It will be the same as _compiler_runtime if
  61   // UseJVMCINativeLibrary is false
  62   static JVMCIRuntime* _java_runtime;
  63 
  64  public:
  65   enum CodeInstallResult {
  66      ok,
  67      dependencies_failed,
  68      dependencies_invalid,
  69      cache_full,
  70      code_too_large
  71   };
  72 
  73   static void do_unloading(bool unloading_occurred);
  74 
  75   static void metadata_do(void f(Metadata*));
  76 
  77   static void oops_do(OopClosure* f);
  78 
  79   static void shutdown();
  80 
  81   static bool shutdown_called();
  82 
  83   static bool is_compiler_initialized();
  84 
  85   /**
  86    * Determines if the VM is sufficiently booted to initialize JVMCI.
  87    */
  88   static bool can_initialize_JVMCI();
  89 
  90   static void initialize_globals();
  91 
  92   static void initialize_compiler(TRAPS);
  93 
  94   static jobject make_global(const Handle& obj);
  95   static void destroy_global(jobject handle);
  96   static bool is_global_handle(jobject handle);
  97 
  98   static jmetadata allocate_handle(const methodHandle& handle);
  99   static jmetadata allocate_handle(const constantPoolHandle& handle);
 100 
 101   static void release_handle(jmetadata handle);
 102 
 103   static JVMCIRuntime* compiler_runtime() { return _compiler_runtime; }
 104   static JVMCIRuntime* java_runtime()     { return _java_runtime; }
 105 };
 106 
 107 #endif // SHARE_JVMCI_JVMCI_HPP