gecko-dev/js/jsd/java/jsd_jvm.c

350 lines
9.7 KiB
C

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Sun Microsystems, Inc.
* Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*
* Copyright (c) 1997 Sun Microsystems, Inc. All Rights Reserved.
*
* Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
* modify and redistribute this software in source and binary code form,
* provided that i) this copyright notice and license appear on all copies of
* the software; and ii) Licensee does not utilize the software in a manner
* which is disparaging to Sun.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
* IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
* NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
* LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
* OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
* LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
* INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
* CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
* OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* This software is not designed or intended for use in on-line control of
* aircraft, air traffic, aircraft navigation or aircraft communications; or in
* the design, construction, operation or maintenance of any nuclear
* facility. Licensee represents and warrants that it will not use or
* redistribute the Software for such purposes.
*/
/*
* Code to start a Java VM (*some* code from the JRE)
*/
#include "jsdj.h"
/***************************************************************************/
#ifdef JSD_STANDALONE_JAVA_VM
#include "jre.h"
static char* more_classpath[] =
{
{"..\\..\\jsdj\\dist\\classes"},
{"..\\..\\jsdj\\dist\\classes\\ifc11.jar"},
/*
* {"..\\..\\..\\jsdj\\dist\\classes"},
* {"..\\..\\..\\jsdj\\dist\\classes\\ifc12.jar"},
*/
/*
* {"..\\..\\samples\\jslogger"},
* {"classes"},
* {"ifc12.jar"},
* {"jsd10.jar"},
* {"jsdeb15.jar"}
*/
};
#define MORE_CLASSPATH_COUNT (sizeof(more_classpath)/sizeof(more_classpath[0]))
/*
* static char main_class[] = "callnative";
* static char main_class[] = "simpleIFC";
* static char* params[] = {"16 Dec 1997"};
* #define PARAM_COUNT (sizeof(params)/sizeof(params[0]))
*/
/*
* static char main_class[] = "netscape/jslogger/JSLogger";
* static char main_class[] = "LaunchJSDebugger";
*/
static char main_class[] = "com/netscape/jsdebugging/ifcui/launcher/local/LaunchJSDebugger";
static char* params[] = {NULL};
#define PARAM_COUNT 0
/* Globals */
static char **props; /* User-defined properties */
static int numProps, maxProps; /* Current, max number of properties */
static void *handle;
static JavaVM *jvm;
static JNIEnv *env;
/* Check for null value and return */
#define NULL_CHECK(e) if ((e) == 0) return 0
/*
* Adds a user-defined system property definition.
*/
void AddProperty(char *def)
{
if (numProps >= maxProps) {
if (props == 0) {
maxProps = 4;
props = JRE_Malloc(maxProps * sizeof(char **));
} else {
char **tmp;
maxProps *= 2;
tmp = JRE_Malloc(maxProps * sizeof(char **));
memcpy(tmp, props, numProps * sizeof(char **));
free(props);
props = tmp;
}
}
props[numProps++] = def;
}
/*
* Deletes a property definition by name.
*/
void DeleteProperty(const char *name)
{
int i;
for (i = 0; i < numProps; ) {
char *def = props[i];
char *c = strchr(def, '=');
int n;
if (c != 0) {
n = c - def;
} else {
n = strlen(def);
}
if (strncmp(name, def, n) == 0) {
if (i < --numProps) {
memmove(&props[i], &props[i+1], (numProps-i) * sizeof(char **));
}
} else {
i++;
}
}
}
/*
* Creates an array of Java string objects from the specified array of C
* strings. Returns 0 if the array could not be created.
*/
jarray NewStringArray(JNIEnv *env, char **cpp, int count)
{
jclass cls;
jarray ary;
int i;
NULL_CHECK(cls = (*env)->FindClass(env, "java/lang/String"));
NULL_CHECK(ary = (*env)->NewObjectArray(env, count, cls, 0));
for (i = 0; i < count; i++) {
jstring str = (*env)->NewStringUTF(env, *cpp++);
NULL_CHECK(str);
(*env)->SetObjectArrayElement(env, ary, i, str);
(*env)->DeleteLocalRef(env, str);
}
return ary;
}
/***************************************************************************/
static JNIEnv*
_CreateJavaVM(void)
{
JNIEnv* env = NULL;
JDK1_1InitArgs vmargs;
JRESettings set;
printf("Starting Java...\n");
if(JRE_GetCurrentSettings(&set) != 0)
{
if(JRE_GetDefaultSettings(&set) != 0)
{
fprintf(stderr, "Could not locate Java runtime\n");
return NULL;
}
}
/* Load runtime library */
handle = JRE_LoadLibrary(set.runtimeLib);
if (handle == 0) {
fprintf(stderr, "Could not load runtime library: %s\n",
set.runtimeLib);
return NULL;
}
/* Add pre-defined system properties */
if (set.javaHome != 0) {
char *def = JRE_Malloc(strlen(set.javaHome) + 16);
sprintf(def, "java.home=%s", set.javaHome);
AddProperty(def);
}
if (set.compiler != 0) {
char *def = JRE_Malloc(strlen(set.compiler) + 16);
sprintf(def, "java.compiler=%s", set.compiler);
AddProperty(def);
}
/*
* The following is used to specify that we require at least
* JNI version 1.1. Currently, this field is not checked but
* will be starting with JDK/JRE 1.2. The value returned after
* calling JNI_GetDefaultJavaVMInitArgs() is the actual JNI version
* supported, and is always higher that the requested version.
*/
vmargs.version = 0x00010001;
if (JRE_GetDefaultJavaVMInitArgs(handle, &vmargs) != 0) {
fprintf(stderr, "Could not initialize Java VM\n");
return NULL;
}
/* Tack on our classpath */
if(MORE_CLASSPATH_COUNT)
{
int i;
int size = strlen(set.classPath) + 1;
char sep[2];
sep[0] = PATH_SEPARATOR;
sep[1] = 0;
for(i = 0; i < MORE_CLASSPATH_COUNT; i++)
size += strlen(more_classpath[i]) + 1;
vmargs.classpath = malloc(size);
if(vmargs.classpath == 0)
{
fprintf(stderr, "malloc error\n");
return NULL;
}
strcpy(vmargs.classpath, set.classPath);
for(i = 0; i < MORE_CLASSPATH_COUNT; i++)
{
strcat(vmargs.classpath, sep);
strcat(vmargs.classpath, more_classpath[i]);
}
}
else
{
vmargs.classpath = set.classPath;
}
/*
* fprintf(stderr, "classpath: %s\n", vmargs.classpath);
*/
/* Set user-defined system properties for Java VM */
if (props != 0) {
if (numProps == maxProps) {
char **tmp = JRE_Malloc((numProps + 1) * sizeof(char **));
memcpy(tmp, props, numProps * sizeof(char **));
free(props);
props = tmp;
}
props[numProps] = 0;
vmargs.properties = props;
}
/* verbose? */
/*
* vmargs.verbose = JNI_TRUE;
*/
/* Load and initialize Java VM */
if (JRE_CreateJavaVM(handle, &jvm, &env, &vmargs) != 0) {
fprintf(stderr, "Could not create Java VM\n");
return NULL;
}
/* Free properties */
if (props != 0) {
free(props);
}
return env;
}
static JSBool
_StartDebuggerFE(JNIEnv* env)
{
jclass clazz;
jmethodID mid;
jarray args;
/* Find class */
clazz = (*env)->FindClass(env, main_class);
if (clazz == 0) {
fprintf(stderr, "Class not found: %s\n", main_class);
return JS_FALSE;
}
/* Find main method of class */
mid = (*env)->GetStaticMethodID(env, clazz, "main",
"([Ljava/lang/String;)V");
if (mid == 0) {
fprintf(stderr, "In class %s: public static void main(String args[])"
" is not defined\n");
return JS_FALSE;
}
/* Invoke main method */
args = NewStringArray(env, params, PARAM_COUNT);
if (args == 0) {
JRE_FatalError(env, "Couldn't build argument list for main\n");
}
(*env)->CallStaticVoidMethod(env, clazz, mid, args);
if ((*env)->ExceptionOccurred(env)) {
(*env)->ExceptionDescribe(env);
}
return JS_TRUE;
}
JNIEnv*
jsdj_CreateJavaVMAndStartDebugger(JSDJContext* jsdjc)
{
JNIEnv* env = NULL;
env = _CreateJavaVM();
if( ! env )
return NULL;
jsdj_SetJNIEnvForCurrentThread(jsdjc, env);
if( ! jsdj_RegisterNatives(jsdjc) )
return NULL;
if( ! _StartDebuggerFE(env) )
return NULL;
return env;
}
#endif /* JSD_STANDALONE_JAVA_VM */
/***************************************************************************/