1 /*
   2  * Copyright (c) 2014, 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.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 #ifndef JAVAVIRTUALMACHINE_H
  27 #define JAVAVIRTUALMACHINE_H
  28 
  29 
  30 #include "jni.h"
  31 #include "Platform.h"
  32 
  33 struct JavaOptionItem {
  34     TString name;
  35     TString value;
  36     void* extraInfo;
  37 };
  38 
  39 class JavaOptions {
  40 private:
  41     std::list<JavaOptionItem> FItems;
  42     JavaVMOption* FOptions;
  43 
  44 public:
  45     JavaOptions();
  46     ~JavaOptions();
  47 
  48     void AppendValue(const TString Key, TString Value, void* Extra);
  49     void AppendValue(const TString Key, TString Value);
  50     void AppendValue(const TString Key);
  51     void AppendValues(OrderedMap<TString, TString> Values);
  52     void ReplaceValue(const TString Key, TString Value);
  53     std::list<TString> ToList();
  54     size_t GetCount();
  55 };
  56 
  57 // Private typedef for function pointer casting
  58 #define LAUNCH_FUNC "JLI_Launch"
  59 
  60 typedef int (JNICALL *JVM_CREATE)(int argc, char ** argv,
  61                                   int jargc, const char** jargv,
  62                                   int appclassc, const char** appclassv,
  63                                   const char* fullversion,
  64                                   const char* dotversion,
  65                                   const char* pname,
  66                                   const char* lname,
  67                                   jboolean javaargs,
  68                                   jboolean cpwildcard,
  69                                   jboolean javaw,
  70                                   jint ergo);
  71 
  72 class JavaLibrary : public Library {
  73     JVM_CREATE FCreateProc;
  74     JavaLibrary(const TString &FileName);
  75 public:
  76     JavaLibrary();
  77     bool JavaVMCreate(size_t argc, char *argv[]);
  78 };
  79 
  80 class JavaVirtualMachine {
  81 private:
  82     JavaLibrary javaLibrary;
  83 
  84     void configureLibrary();
  85     bool launchVM(JavaOptions& options, std::list<TString>& vmargs);
  86 public:
  87     JavaVirtualMachine();
  88     ~JavaVirtualMachine(void);
  89 
  90     bool StartJVM();
  91 };
  92 
  93 bool RunVM();
  94 
  95 #endif // JAVAVIRTUALMACHINE_H