Attachment 17063 Details for Bug 82518 – First attempt to launch Eclipse with JNI on Windows

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[patch] First attempt to launch Eclipse with JNI on Windows

(text/plain), 5.11 KB, created by Ed Burnette

on 2005-01-10 17:21:21 EST

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Creator: Ed Burnette

Created: 2005-01-10 17:21:21 EST

Size: 5.11 KB

patch

obsolete

>Index: eclipseWin.c
>===================================================================
>RCS file: /home/eclipse/platform-launcher/library/win32/eclipseWin.c,v
>retrieving revision 1.20
>diff -u -r1.20 eclipseWin.c
>--- eclipseWin.c	10 Dec 2004 17:28:53 -0000	1.20
>+++ eclipseWin.c	10 Jan 2005 22:10:11 -0000
>@@ -25,9 +25,17 @@
> /* Global Variables */
> _TCHAR   dirSeparator  = _T('\\');
> _TCHAR   pathSeparator = _T(';');
>+#define JNI_INVOKE 1
>+#ifdef JNI_INVOKE
>+#include <jni.h>       /* java native interface */
>+_TCHAR*  consoleVM     = _T("jni.dll");
>+_TCHAR*  defaultVM     = _T("jni.dll");
>+_TCHAR*  shippedVMDir  = _T("jre\\bin\\client\\");
>+#else
> _TCHAR*  consoleVM     = _T("java.exe");
> _TCHAR*  defaultVM     = _T("javaw.exe");
> _TCHAR*  shippedVMDir  = _T("jre\\bin\\");
>+#endif
> 
> /* Define the window system arguments for the Java VM. */
> static _TCHAR*  argVM[] = { NULL };
>@@ -162,6 +170,48 @@
> 	return argVM;
> }
> 
>+#ifdef JNI_INVOKE
>+static jstring newJavaString(JNIEnv *env, char *s)
>+{    
>+	int len;
>+	jclass cls;
>+	jmethodID mid;
>+	jbyteArray ary;
>+	jstring str = 0;
>+	
>+	if (s == NULL)
>+		return 0;
>+	len = strlen(s);
>+	ary = (*env)->NewByteArray(env, len);
>+	if (ary != 0)
>+	{
>+		(*env)->SetByteArrayRegion(env, ary, 0, len, (jbyte *)s);
>+		if (!(*env)->ExceptionOccurred(env)) {
>+			cls = (*env)->FindClass(env, "java/lang/String");
>+			mid = (*env)->GetMethodID(env, cls, "<init>",  "([B)V");
>+		    str = (*env)->NewObject(env, cls, mid, ary);
>+		}
>+		(*env)->DeleteLocalRef(env, ary);
>+	} 
>+	return str;
>+}
>+
>+static jobjectArray newJavaStringArray(JNIEnv *env, char **argv, int argc)
>+{
>+    jarray cls;
>+    jarray ary;
>+    int i;
>+
>+    cls = (*env)->FindClass(env, "java/lang/String");
>+    ary = (*env)->NewObjectArray(env, argc, cls, 0);
>+    for (i = 0; i < argc; i++) {
>+		jstring str = newJavaString(env, *argv++);
>+		(*env)->SetObjectArrayElement(env, ary, i, str);
>+		(*env)->DeleteLocalRef(env, str);
>+    }
>+    return ary;
>+}
>+#endif
> 
> /* Start the Java VM
>  *
>@@ -170,6 +220,90 @@
>  */
> int startJavaVM( _TCHAR* args[] )
> {
>+#ifdef JNI_INVOKE
>+	HINSTANCE jvmLibrary; // Library handle
>+	//displayMessage(_T("jni invoke\n"));
>+	jvmLibrary = LoadLibrary(args[0]);
>+	/* If the child library (JVM) would not start */
>+	if (jvmLibrary == 0)
>+	{
>+		/* Return the error number. */
>+		displayMessage(_T("child lib would not start\n"));
>+		jvmExitCode = errno;
>+		jvmLibrary  = 0;
>+	}
>+	else
>+	{
>+		/* Get the function addresses */
>+		jint (JNICALL *createJavaVM)(JavaVM **pvm, JNIEnv **env, void *args);
>+		jint (JNICALL *getDefaultJavaVMInitArgs)(void *args);
>+	    createJavaVM = (void *)GetProcAddress(jvmLibrary, "JNI_CreateJavaVM");
>+	    getDefaultJavaVMInitArgs = (void *)GetProcAddress(jvmLibrary, "JNI_GetDefaultJavaVMInitArgs");
>+	    if (createJavaVM == 0 || getDefaultJavaVMInitArgs == 0)
>+		{
>+			/* Return the error number. */
>+			displayMessage(_T("createJavaVM or getDefaultJavaVMInitArgs address not found\n"));
>+			jvmExitCode = errno;
>+			jvmLibrary  = 0;
>+		}
>+		else
>+		{
>+			JavaVM *jvm;       /* denotes a Java VM */
>+			JNIEnv *env;       /* pointer to native method interface */
>+			// documented here: http://java.sun.com/j2se/1.4.2/docs/guide/jni/jni-12.html#JNI_CreateJavaVM
>+			JavaVMInitArgs  vm_args = {0};
>+			JavaVMOption options[4];
>+			options[0].optionString = "-Djava.class.path=startup.jar";
>+			vm_args.version = JNI_VERSION_1_4;
>+			vm_args.options = options;
>+			vm_args.nOptions = 1;
>+			vm_args.ignoreUnrecognized = JNI_TRUE;
>+			
>+			/* load and initialize a Java VM, return a JNI interface pointer in env */
>+			//displayMessage(_T("about to create vm\n"));
>+			(*createJavaVM)(&jvm, &env, &vm_args);
>+			if (jvm == NULL)
>+			{
>+				displayMessage(_T("createJavaVM failed\n"));
>+				jvmExitCode = errno;
>+				jvmLibrary  = 0;
>+			}
>+			else
>+			{
>+				/* invoke the Main.test method using the JNI */
>+				//displayMessage(_T("about to FindClass\n"));
>+				jclass cls = (*env)->FindClass(env, "org/eclipse/core/launcher/Main");
>+				if (cls == NULL)
>+				{
>+					displayMessage(_T("FindClass failed\n"));
>+					jvmExitCode = errno;
>+					jvmLibrary  = 0;
>+				}
>+				else
>+				{
>+					//displayMessage(_T("about to GetStaticMethodID\n"));
>+					jmethodID mid = (*env)->GetStaticMethodID(env, cls, "main", "([Ljava/lang/String;)V");
>+					if (mid == NULL)
>+					{
>+						displayMessage(_T("GetStaticMethodID failed\n"));
>+						jvmExitCode = errno;
>+						jvmLibrary  = 0;
>+					}
>+					else
>+					{
>+						//displayMessage(_T("about to call main\n"));
>+						(*env)->CallStaticVoidMethod(env, cls, mid,
>+							newJavaStringArray(env, NULL, 0));
>+						// shouldn't get here, but just in case...
>+						displayMessage(_T("main complete, destroying vm\n"));
>+						/* We are done. */
>+						(*jvm)->DestroyJavaVM(jvm);
>+					}
>+				}
>+			}
>+		}
>+	}
>+#else
>     MSG   msg;
> 	int   index, length;
> 	_TCHAR *commandLine, *ch, *space;
>@@ -244,6 +378,7 @@
>         KillTimer( topWindow, jvmExitTimerId );
> 	}
> 
>+#endif
> 	/* Return the exit code from the JVM. */
> 	return jvmExitCode;
> }

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Attachments on bug 82518: 17063 | 17091