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Copy pathinit.c
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427 lines (350 loc) · 12.9 KB
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#include "rJava.h"
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
/* global variables */
JavaVM *jvm;
/* this will be set when Java tries to exit() but we carry on */
int java_is_dead = 0;
/* cached, global objects */
jclass javaStringClass;
jclass javaObjectClass;
jclass javaClassClass;
jclass javaFieldClass;
/* cached, global method IDs */
jmethodID mid_forName;
jmethodID mid_getName;
jmethodID mid_getSuperclass;
jmethodID mid_getType;
jmethodID mid_getField;
/* internal classes and methods */
jclass rj_RJavaTools_Class = (jclass)0;
jmethodID mid_rj_getSimpleClassNames = (jmethodID)0 ;
jmethodID mid_RJavaTools_getFieldTypeName = (jmethodID)0 ;
jclass rj_RJavaImport_Class = (jclass)0;
jmethodID mid_RJavaImport_getKnownClasses = (jmethodID)0 ;
jmethodID mid_RJavaImport_lookup = (jmethodID)0 ;
jmethodID mid_RJavaImport_exists = (jmethodID)0 ;
int rJava_initialized = 0;
static int jvm_opts=0;
static char **jvm_optv=0;
#ifdef JNI_VERSION_1_2
static JavaVMOption *vm_options;
static JavaVMInitArgs vm_args;
#else
#error "Java/JNI 1.2 or higher is required!"
#endif
#define H_OUT 1
#define H_EXIT 2
#ifdef Win32
/* the hooks are reportedly causing problems on Windows, so disable them by default */
static int default_hooks = 0;
#else
static int default_hooks = H_OUT|H_EXIT;
#endif
static int JNICALL vfprintf_hook(FILE *f, const char *fmt, va_list ap) {
#ifdef Win32
/* on Windows f doesn't refer to neither stderr nor stdout,
so we have no way of finding out the target, so we assume stderr */
REvprintf(fmt, ap);
return 0;
#else
if (f==stderr) {
REvprintf(fmt, ap);
return 0;
} else if (f==stdout) {
Rvprintf(fmt, ap);
return 0;
}
return vfprintf(f, fmt, ap);
#endif
}
static void JNICALL exit_hook(int status) {
/* REprintf("\nJava requested System.exit(%d), trying to raise R error - this may crash if Java is in a bad state.\n", status); */
java_is_dead = 1;
Rf_error("Java called System.exit(%d) requesting R to quit - trying to recover", status);
/* FIXME: we could do something smart here such as running a call-back
into R ... jump into R event loop ... at any rate we cannot return,
but we don't want to kill R ... */
exit(status);
}
/* in reality WIN64 implies WIN32 but to make sure ... */
#if defined(_WIN64) || defined(_WIN32)
#include <io.h>
#include <fcntl.h>
#endif
static int initJVM(const char *user_classpath, int opts, char **optv, int hooks) {
int total_num_properties, propNum = 0;
jint res;
char *classpath;
if(!user_classpath)
/* use the CLASSPATH environment variable as default */
user_classpath = getenv("CLASSPATH");
if(!user_classpath) user_classpath = "";
vm_args.version = JNI_VERSION_1_2;
if(JNI_GetDefaultJavaVMInitArgs(&vm_args) != JNI_OK) {
error("JNI 1.2 or higher is required");
return -1;
}
/* leave room for class.path, and optional jni args */
total_num_properties = 6 + opts;
vm_options = (JavaVMOption *) calloc(total_num_properties, sizeof(JavaVMOption));
vm_args.version = JNI_VERSION_1_2; /* should we do that or keep the default? */
vm_args.options = vm_options;
vm_args.ignoreUnrecognized = JNI_TRUE;
classpath = (char*) calloc(24 + strlen(user_classpath), sizeof(char));
sprintf(classpath, "-Djava.class.path=%s", user_classpath);
vm_options[propNum++].optionString = classpath;
/* print JNI-related messages */
/* vm_options[propNum++].optionString = "-verbose:class,jni"; */
if (optv) {
int i=0;
while (i<opts) {
if (optv[i]) vm_options[propNum++].optionString = optv[i];
i++;
}
}
if (hooks&H_OUT) {
vm_options[propNum].optionString = "vfprintf";
vm_options[propNum++].extraInfo = vfprintf_hook;
}
if (hooks&H_EXIT) {
vm_options[propNum].optionString = "exit";
vm_options[propNum++].extraInfo = exit_hook;
}
vm_args.nOptions = propNum;
/* Create the Java VM */
res = JNI_CreateJavaVM(&jvm,(void **)&eenv, &vm_args);
if (res != 0)
error("Cannot create Java virtual machine (%d)", res);
if (!eenv)
error("Cannot obtain JVM environemnt");
#if defined(_WIN64) || defined(_WIN32)
_setmode(0, _O_TEXT);
#endif
return 0;
}
#ifdef THREADS
#include <pthread.h>
#ifdef XXDARWIN
#include <Carbon/Carbon.h>
#include <CoreFoundation/CoreFoundation.h>
#include <CoreFoundation/CFRunLoop.h>
#endif
pthread_t initJVMpt;
pthread_mutex_t initMutex = PTHREAD_MUTEX_INITIALIZER;
int thInitResult = 0;
int initAWT = 0;
static void *initJVMthread(void *classpath)
{
int ws;
jclass c;
JNIEnv *lenv;
thInitResult=initJVM((char*)classpath, jvm_opts, jvm_optv, default_hooks);
if (thInitResult) return 0;
init_rJava();
lenv = eenv; /* we make a local copy before unlocking just in case
someone messes with it before we can use it */
_dbg(rjprintf("initJVMthread: unlocking\n"));
pthread_mutex_unlock(&initMutex);
if (initAWT) {
_dbg(rjprintf("initJVMthread: get AWT class\n"));
/* we are still on the same thread, so we can safely use eenv */
c = (*lenv)->FindClass(lenv, "java/awt/Frame");
}
_dbg(rjprintf("initJVMthread: returning from the init thread.\n"));
return 0;
}
#endif
/* initialize internal structures/variables of rJava.
The JVM initialization was performed before (but may have failed)
*/
HIDE void init_rJava(void) {
jclass c;
JNIEnv *env = getJNIEnv();
if (!env) return; /* initJVMfailed, so we cannot proceed */
/* get global classes. we make the references explicitely global (although unloading of String/Object is more than unlikely) */
c=(*env)->FindClass(env, "java/lang/String");
if (!c) error("unable to find the basic String class");
javaStringClass=(*env)->NewGlobalRef(env, c);
if (!javaStringClass) error("unable to create a global reference to the basic String class");
(*env)->DeleteLocalRef(env, c);
c=(*env)->FindClass(env, "java/lang/Object");
if (!c) error("unable to find the basic Object class");
javaObjectClass=(*env)->NewGlobalRef(env, c);
if (!javaObjectClass) error("unable to create a global reference to the basic Object class");
(*env)->DeleteLocalRef(env, c);
c = (*env)->FindClass(env, "java/lang/Class");
if (!c) error("unable to find the basic Class class");
javaClassClass=(*env)->NewGlobalRef(env, c);
if (!javaClassClass) error("unable to create a global reference to the basic Class class");
(*env)->DeleteLocalRef(env, c);
c = (*env)->FindClass(env, "java/lang/reflect/Field");
if (!c) error("unable to find the basic Field class");
javaFieldClass=(*env)->NewGlobalRef(env, c);
if (!javaFieldClass) error("unable to create a global reference to the basic Class class");
(*env)->DeleteLocalRef(env, c);
mid_forName = (*env)->GetStaticMethodID(env, javaClassClass, "forName", "(Ljava/lang/String;ZLjava/lang/ClassLoader;)Ljava/lang/Class;");
if (!mid_forName) error("cannot obtain Class.forName method ID");
mid_getName = (*env)->GetMethodID(env, javaClassClass, "getName", "()Ljava/lang/String;");
if (!mid_getName) error("cannot obtain Class.getName method ID");
mid_getSuperclass =(*env)->GetMethodID(env, javaClassClass, "getSuperclass", "()Ljava/lang/Class;");
if (!mid_getSuperclass) error("cannot obtain Class.getSuperclass method ID");
mid_getField = (*env)->GetMethodID(env, javaClassClass, "getField",
"(Ljava/lang/String;)Ljava/lang/reflect/Field;");
if (!mid_getField) error("cannot obtain Class.getField method ID");
mid_getType = (*env)->GetMethodID(env, javaFieldClass, "getType",
"()Ljava/lang/Class;");
if (!mid_getType) error("cannot obtain Field.getType method ID");
rJava_initialized = 1;
}
/** RinitJVM(classpath)
initializes JVM with the specified class path */
REP SEXP RinitJVM(SEXP par)
{
const char *c=0;
SEXP e=CADR(par);
int r=0;
JavaVM *jvms[32];
jsize vms=0;
jvm_opts=0;
jvm_optv=0;
if (TYPEOF(e)==STRSXP && LENGTH(e)>0)
c=CHAR(STRING_ELT(e,0));
e = CADDR(par);
if (TYPEOF(e)==STRSXP && LENGTH(e)>0) {
int len = LENGTH(e), add_xrs = 1, joi = 0;
jvm_optv = (char**)malloc(sizeof(char*) * (len + 3));
if (!jvm_optv) Rf_error("Cannot allocate options buffer - out of memory");
#ifdef USE_HEADLESS_INIT
/* prepend headless so the user can still override it */
jvm_optv[jvm_opts++] = "-Djava.awt.headless=true";
#endif
while (joi < len) {
jvm_optv[jvm_opts] = strdup(CHAR(STRING_ELT(e, joi++)));
#ifdef HAVE_XRS
/* check if Xrs is already used */
if (!strcmp(jvm_optv[jvm_opts], "-Xrs"))
add_xrs = 0;
#endif
jvm_opts++;
}
#ifdef HAVE_XRS
if (add_xrs)
jvm_optv[jvm_opts++] = "-Xrs";
#endif
} else {
#ifdef USE_HEADLESS_INIT
jvm_optv = (char**)malloc(sizeof(char*) * 3);
if (!jvm_optv) Rf_error("Cannot allocate options buffer - out of memory");
jvm_optv[jvm_opts++] = "-Djava.awt.headless=true";
#endif
#ifdef HAVE_XRS
if (!jvm_optv) jvm_optv = (char**)malloc(sizeof(char*) * 2);
if (!jvm_optv) Rf_error("Cannot allocate options buffer - out of memory");
jvm_optv[jvm_opts++] = "-Xrs";
#endif
}
if (jvm_opts)
jvm_optv[jvm_opts] = 0;
r=JNI_GetCreatedJavaVMs(jvms, 32, &vms);
if (r) {
Rf_error("JNI_GetCreatedJavaVMs returned %d\n", r);
} else {
if (vms>0) {
int i=0;
_dbg(rjprintf("RinitJVM: Total %d JVMs found. Trying to attach the current thread.\n", (int)vms));
while (i<vms) {
if (jvms[i]) {
if (!(*jvms[i])->AttachCurrentThread(jvms[i], (void**)&eenv, NULL)) {
_dbg(rjprintf("RinitJVM: Attached to existing JVM #%d.\n", i+1));
break;
}
}
i++;
}
if (i==vms) Rf_error("Failed to attach to any existing JVM.");
else {
jvm = jvms[i];
init_rJava();
}
PROTECT(e=allocVector(INTSXP,1));
INTEGER(e)[0]=(i==vms)?-2:1;
UNPROTECT(1);
return e;
}
}
#ifdef THREADS
if (getenv("R_GUI_APP_VERSION") || getenv("RJAVA_INIT_AWT"))
initAWT=1;
_dbg(rjprintf("RinitJVM(threads): launching thread\n"));
pthread_mutex_lock(&initMutex);
pthread_create(&initJVMpt, 0, initJVMthread, c);
_dbg(rjprintf("RinitJVM(threads): waiting for mutex\n"));
pthread_mutex_lock(&initMutex);
pthread_mutex_unlock(&initMutex);
/* pthread_join(initJVMpt, 0); */
_dbg(rjprintf("RinitJVM(threads): attach\n"));
/* since JVM was initialized by another thread, we need to attach ourselves */
(*jvm)->AttachCurrentThread(jvm, (void**)&eenv, NULL);
_dbg(rjprintf("RinitJVM(threads): done.\n"));
r = thInitResult;
#else
profStart();
r=initJVM(c, jvm_opts, jvm_optv, default_hooks);
init_rJava();
_prof(profReport("init_rJava:"));
_dbg(rjprintf("RinitJVM(non-threaded): initJVM returned %d\n", r));
#endif
if (jvm_optv) free(jvm_optv);
jvm_opts=0;
PROTECT(e=allocVector(INTSXP,1));
INTEGER(e)[0]=r;
UNPROTECT(1);
return e;
}
REP void doneJVM() {
(*jvm)->DestroyJavaVM(jvm);
jvm = 0;
eenv = 0;
}
/**
* Initializes the cached values of classes and methods used internally
* These classes and methods are the ones that are in rJava (RJavaTools, ...)
* not java standard classes (Object, Class)
*/
REPC SEXP initRJavaTools(){
JNIEnv *env=getJNIEnv();
jclass c;
/* classes */
/* RJavaTools class */
c= findClass( env, "RJavaTools" ) ;
if (!c) error("unable to find the RJavaTools class");
rj_RJavaTools_Class=(*env)->NewGlobalRef(env, c);
if (!rj_RJavaTools_Class) error("unable to create a global reference to the RJavaTools class");
(*env)->DeleteLocalRef(env, c);
/* RJavaImport */
c= findClass( env, "RJavaImport" ) ;
if (!c) error("unable to find the RJavaImport class");
rj_RJavaImport_Class=(*env)->NewGlobalRef(env, c);
if (!rj_RJavaImport_Class) error("unable to create a global reference to the RJavaImport class");
(*env)->DeleteLocalRef(env, c);
/* methods */
mid_RJavaTools_getFieldTypeName = (*env)->GetStaticMethodID(env, rj_RJavaTools_Class,
"getFieldTypeName", "(Ljava/lang/Class;Ljava/lang/String;)Ljava/lang/String;");
if (!mid_RJavaTools_getFieldTypeName) error("cannot obtain RJavaTools.getFieldTypeName method ID");
mid_rj_getSimpleClassNames = (*env)->GetStaticMethodID(env, rj_RJavaTools_Class,
"getSimpleClassNames", "(Ljava/lang/Object;Z)[Ljava/lang/String;");
if (!mid_rj_getSimpleClassNames) error("cannot obtain RJavaTools.getDimpleClassNames method ID");
mid_RJavaImport_getKnownClasses = (*env)->GetMethodID(env, rj_RJavaImport_Class,
"getKnownClasses", "()[Ljava/lang/String;");
if (!mid_RJavaImport_getKnownClasses) error("cannot obtain RJavaImport.getKnownClasses method ID");
mid_RJavaImport_lookup = (*env)->GetMethodID(env, rj_RJavaImport_Class,
"lookup", "(Ljava/lang/String;)Ljava/lang/Class;");
if( !mid_RJavaImport_lookup) error("cannot obtain RJavaImport.lookup method ID");
mid_RJavaImport_exists = (*env)->GetMethodID(env, rj_RJavaImport_Class,
"exists", "(Ljava/lang/String;)Z");
if( ! mid_RJavaImport_exists ) error("cannot obtain RJavaImport.exists method ID");
// maybe add RJavaArrayTools, ...
return R_NilValue;
}
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