1 /* 2 * Copyright (c) 1998, 2016, 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 _JAVA_H_ 27 #define _JAVA_H_ 28 29 #include <stdio.h> 30 #include <stdlib.h> 31 #include <string.h> 32 #include <limits.h> 33 34 #include <jni.h> 35 #include <jvm.h> 36 37 /* 38 * Get system specific defines. 39 */ 40 #include "emessages.h" 41 #include "java_md.h" 42 #include "jli_util.h" 43 #include "manifest_info.h" 44 #include "wildcard.h" 45 #include "splashscreen.h" 46 47 # define KB (1024UL) 48 # define MB (1024UL * KB) 49 # define GB (1024UL * MB) 50 51 #define CURRENT_DATA_MODEL (CHAR_BIT * sizeof(void*)) 52 53 /* 54 * The following environment variable is used to influence the behavior 55 * of the jre exec'd through the SelectVersion routine. The command line 56 * options which specify the version are not passed to the exec'd version, 57 * because that jre may be an older version which wouldn't recognize them. 58 * This environment variable is known to this (and later) version and serves 59 * to suppress the version selection code. This is not only for efficiency, 60 * but also for correctness, since any command line options have been 61 * removed which would cause any value found in the manifest to be used. 62 * This would be incorrect because the command line options are defined 63 * to take precedence. 64 * 65 * The value associated with this environment variable is the MainClass 66 * name from within the executable jar file (if any). This is strictly a 67 * performance enhancement to avoid re-reading the jar file manifest. 68 * 69 */ 70 #define ENV_ENTRY "_JAVA_VERSION_SET" 71 72 #define SPLASH_FILE_ENV_ENTRY "_JAVA_SPLASH_FILE" 73 #define SPLASH_JAR_ENV_ENTRY "_JAVA_SPLASH_JAR" 74 75 /* 76 * Pointers to the needed JNI invocation API, initialized by LoadJavaVM. 77 */ 78 typedef jint (JNICALL *CreateJavaVM_t)(JavaVM **pvm, void **env, void *args); 79 typedef jint (JNICALL *GetDefaultJavaVMInitArgs_t)(void *args); 80 typedef jint (JNICALL *GetCreatedJavaVMs_t)(JavaVM **vmBuf, jsize bufLen, jsize *nVMs); 81 82 typedef struct { 83 CreateJavaVM_t CreateJavaVM; 84 GetDefaultJavaVMInitArgs_t GetDefaultJavaVMInitArgs; 85 GetCreatedJavaVMs_t GetCreatedJavaVMs; 86 } InvocationFunctions; 87 88 int 89 JLI_Launch(int argc, char ** argv, /* main argc, argc */ 90 int jargc, const char** jargv, /* java args */ 91 int appclassc, const char** appclassv, /* app classpath */ 92 const char* fullversion, /* full version defined */ 93 const char* dotversion, /* dot version defined */ 94 const char* pname, /* program name */ 95 const char* lname, /* launcher name */ 96 jboolean javaargs, /* JAVA_ARGS */ 97 jboolean cpwildcard, /* classpath wildcard */ 98 jboolean javaw, /* windows-only javaw */ 99 jint ergo_class /* ergnomics policy */ 100 ); 101 102 /* 103 * Prototypes for launcher functions in the system specific java_md.c. 104 */ 105 106 jboolean 107 LoadJavaVM(const char *jvmpath, InvocationFunctions *ifn); 108 109 void 110 GetXUsagePath(char *buf, jint bufsize); 111 112 jboolean 113 GetApplicationHome(char *buf, jint bufsize); 114 115 #define GetArch() GetArchPath(CURRENT_DATA_MODEL) 116 117 /* 118 * Different platforms will implement this, here 119 * pargc is a pointer to the original argc, 120 * pargv is a pointer to the original argv, 121 * jrepath is an accessible path to the jre as determined by the call 122 * so_jrepath is the length of the buffer jrepath 123 * jvmpath is an accessible path to the jvm as determined by the call 124 * so_jvmpath is the length of the buffer jvmpath 125 */ 126 void CreateExecutionEnvironment(int *argc, char ***argv, 127 char *jrepath, jint so_jrepath, 128 char *jvmpath, jint so_jvmpath, 129 char *jvmcfg, jint so_jvmcfg); 130 131 /* Reports an error message to stderr or a window as appropriate. */ 132 void JLI_ReportErrorMessage(const char * message, ...); 133 134 /* Reports a system error message to stderr or a window */ 135 void JLI_ReportErrorMessageSys(const char * message, ...); 136 137 /* Reports an error message only to stderr. */ 138 void JLI_ReportMessage(const char * message, ...); 139 140 /* 141 * Reports an exception which terminates the vm to stderr or a window 142 * as appropriate. 143 */ 144 void JLI_ReportExceptionDescription(JNIEnv * env); 145 void PrintMachineDependentOptions(); 146 147 /* 148 * Block current thread and continue execution in new thread 149 */ 150 int ContinueInNewThread0(int (JNICALL *continuation)(void *), 151 jlong stack_size, void * args); 152 153 /* sun.java.launcher.* platform properties. */ 154 void SetJavaLauncherPlatformProps(void); 155 void SetJavaCommandLineProp(char* what, int argc, char** argv); 156 void SetJavaLauncherProp(void); 157 158 /* 159 * Functions defined in java.c and used in java_md.c. 160 */ 161 jint ReadKnownVMs(const char *jvmcfg, jboolean speculative); 162 char *CheckJvmType(int *argc, char ***argv, jboolean speculative); 163 void AddOption(char *str, void *info); 164 jboolean IsWhiteSpaceOption(const char* name); 165 166 enum ergo_policy { 167 DEFAULT_POLICY = 0, 168 NEVER_SERVER_CLASS, 169 ALWAYS_SERVER_CLASS 170 }; 171 172 const char* GetProgramName(); 173 const char* GetFullVersion(); 174 jboolean IsJavaArgs(); 175 jboolean IsJavaw(); 176 jint GetErgoPolicy(); 177 178 jboolean ServerClassMachine(); 179 180 int ContinueInNewThread(InvocationFunctions* ifn, jlong threadStackSize, 181 int argc, char** argv, 182 int mode, char *what, int ret); 183 184 int JVMInit(InvocationFunctions* ifn, jlong threadStackSize, 185 int argc, char** argv, 186 int mode, char *what, int ret); 187 188 /* 189 * Initialize platform specific settings 190 */ 191 void InitLauncher(jboolean javaw); 192 193 /* 194 * For MacOSX and Windows/Unix compatibility we require these 195 * entry points, some of them may be stubbed out on Windows/Unixes. 196 */ 197 void PostJVMInit(JNIEnv *env, jclass mainClass, JavaVM *vm); 198 void ShowSplashScreen(); 199 void RegisterThread(); 200 /* 201 * this method performs additional platform specific processing and 202 * should return JNI_TRUE to indicate the argument has been consumed, 203 * otherwise returns JNI_FALSE to allow the calling logic to further 204 * process the option. 205 */ 206 jboolean ProcessPlatformOption(const char *arg); 207 208 /* 209 * This allows for finding classes from the VM's bootstrap class loader directly, 210 * FindClass uses the application class loader internally, this will cause 211 * unnecessary searching of the classpath for the required classes. 212 * 213 */ 214 typedef jclass (JNICALL FindClassFromBootLoader_t(JNIEnv *env, 215 const char *name)); 216 jclass FindBootStrapClass(JNIEnv *env, const char *classname); 217 218 jobjectArray CreateApplicationArgs(JNIEnv *env, char **strv, int argc); 219 jobjectArray NewPlatformStringArray(JNIEnv *env, char **strv, int strc); 220 jclass GetLauncherHelperClass(JNIEnv *env); 221 222 int JNICALL JavaMain(void * args); /* entry point */ 223 224 enum LaunchMode { // cf. sun.launcher.LauncherHelper 225 LM_UNKNOWN = 0, 226 LM_CLASS, 227 LM_JAR, 228 LM_MODULE 229 }; 230 231 static const char *launchModeNames[] 232 = { "Unknown", "Main class", "JAR file", "Module" }; 233 234 typedef struct { 235 int argc; 236 char **argv; 237 int mode; 238 char *what; 239 InvocationFunctions ifn; 240 } JavaMainArgs; 241 242 #define NULL_CHECK_RETURN_VALUE(NCRV_check_pointer, NCRV_return_value) \ 243 do { \ 244 if ((NCRV_check_pointer) == NULL) { \ 245 JLI_ReportErrorMessage(JNI_ERROR); \ 246 return NCRV_return_value; \ 247 } \ 248 } while (JNI_FALSE) 249 250 #define NULL_CHECK0(NC0_check_pointer) \ 251 NULL_CHECK_RETURN_VALUE(NC0_check_pointer, 0) 252 253 #define NULL_CHECK(NC_check_pointer) \ 254 NULL_CHECK_RETURN_VALUE(NC_check_pointer, ) 255 256 #define CHECK_EXCEPTION_RETURN() \ 257 do { \ 258 if ((*env)->ExceptionOccurred(env)) { \ 259 return; \ 260 } \ 261 } while (JNI_FALSE) 262 263 #endif /* _JAVA_H_ */