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 "interpreter/interpreter.hpp"
  28 #include "jvmci/jvmciExceptions.hpp"
  29 #include "jvmci/jvmciJavaClasses.hpp"
  30 #include "memory/allocation.hpp"
  31 #include "runtime/arguments.hpp"
  32 #include "runtime/deoptimization.hpp"
  33 
  34 class MetadataHandleBlock;
  35 class JVMCIRuntime;
  36 
  37 struct _jmetadata;
  38 typedef struct _jmetadata *jmetadata;
  39 
  40 class JVMCI : public AllStatic {
  41   friend class JVMCIRuntime;
  42   friend class JVMCIEnv;
  43 
  44  private:
  45   // Handles to objects in the HotSpot heap.
  46   static JNIHandleBlock* _object_handles;
  47 
  48   // Handles to Metadata objects.
  49   static MetadataHandleBlock* _metadata_handles;
  50 
  51   // Access to the HotSpotJVMCIRuntime used by the CompileBroker.
  52   static JVMCIRuntime* _compiler_runtime;
  53 
  54   // Access to the HotSpotJVMCIRuntime used by Java code running on the
  55   // HotSpot heap. It will be the same as _compiler_runtime if
  56   // UseJVMCINativeLibrary is false
  57   static JVMCIRuntime* _java_runtime;
  58 
  59  public:
  60   enum CodeInstallResult {
  61      ok,
  62      dependencies_failed,
  63      dependencies_invalid,
  64      cache_full,
  65      code_too_large
  66   };
  67 
  68   static void do_unloading(BoolObjectClosure* is_alive, bool unloading_occurred);
  69 
  70   static void metadata_do(void f(Metadata*));
  71 
  72   static void oops_do(OopClosure* f);
  73 
  74   static void shutdown();
  75 
  76   static bool shutdown_called();
  77 
  78   /**
  79    * Lets JVMCI modify the compilation level currently selected for a method by
  80    * the VM compilation policy.
  81    *
  82    * @param method the method being scheduled for compilation
  83    * @param is_osr specifies if the compilation is an OSR compilation
  84    * @param level the compilation level currently selected by the VM compilation policy
  85    * @param thread the current thread
  86    * @return the compilation level to use for the compilation
  87    */
  88   static CompLevel adjust_comp_level(methodHandle method, bool is_osr, CompLevel level, JavaThread* thread);
  89 
  90   static bool is_compiler_initialized();
  91 
  92   /**
  93    * Determines if the VM is sufficiently booted to initialize JVMCI.
  94    */
  95   static bool can_initialize_JVMCI();
  96 
  97   static void initialize_globals();
  98 
  99   static void initialize_compiler(TRAPS);
 100   // JVMCIRuntime::call_getCompiler(CHECK);
 101 
 102   static jobject make_global(Handle obj);
 103   static bool is_global_handle(jobject handle);
 104 
 105   static jmetadata allocate_handle(const methodHandle& handle);
 106   static jmetadata allocate_handle(const constantPoolHandle& handle);
 107 
 108   static void release_handle(jmetadata handle);
 109 
 110   static JVMCIRuntime* compiler_runtime() { return _compiler_runtime; }
 111   static JVMCIRuntime* java_runtime()     { return _java_runtime; }
 112 };
 113 
 114 #endif // SHARE_JVMCI_JVMCI_HPP