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 // Access to the HotSpotJVMCIRuntime used by the CompileBroker. 49 static JVMCIRuntime* _compiler_runtime; 50 51 // True when at least one JVMCIRuntime::initialize_HotSpotJVMCIRuntime() 52 // execution has completed successfully. 53 static volatile bool _is_initialized; 54 55 // Handle created when loading the JVMCI shared library with os::dll_load. 56 // Must hold JVMCI_lock when initializing. 57 static void* _shared_library_handle; 58 59 // Argument to os::dll_load when loading JVMCI shared library 60 static char* _shared_library_path; 61 62 // Records whether JVMCI::shutdown has been called. 63 static volatile bool _in_shutdown; 64 65 // Access to the HotSpot heap based JVMCIRuntime 66 static JVMCIRuntime* _java_runtime; 67 68 public: 69 enum CodeInstallResult { 70 ok, 71 dependencies_failed, 72 dependencies_invalid, 73 cache_full, 74 code_too_large 75 }; 76 77 // Gets the handle to the loaded JVMCI shared library, loading it 78 // first if not yet loaded and `load` is true. The path from 79 // which the library is loaded is returned in `path`. If 80 // `load` is true then JVMCI_lock must be locked. 81 static void* get_shared_library(char*& path, bool load); 82 83 static void do_unloading(bool unloading_occurred); 84 85 static void metadata_do(void f(Metadata*)); 86 87 static void oops_do(OopClosure* f); 88 89 static void shutdown(); 90 91 // Returns whether JVMCI::shutdown has been called. 92 static bool in_shutdown(); 93 94 static bool is_compiler_initialized(); 95 96 /** 97 * Determines if the VM is sufficiently booted to initialize JVMCI. 98 */ 99 static bool can_initialize_JVMCI(); 100 101 static void initialize_globals(); 102 103 static void initialize_compiler(TRAPS); 104 105 static JVMCIRuntime* compiler_runtime() { return _compiler_runtime; } 106 // Gets the single runtime for JVMCI on the Java heap. This is the only 107 // JVMCI runtime available when !UseJVMCINativeLibrary. 108 static JVMCIRuntime* java_runtime() { return _java_runtime; } 109 }; 110 111 #endif // SHARE_JVMCI_JVMCI_HPP --- EOF ---