jboolean rvmLoadNativeLibrary(Env* env, const char* path, ClassLoader* classLoader) {
DynamicLib** nativeLibs = NULL;
if (!classLoader || classLoader->parent == NULL) {
// This is the bootstrap classloader
nativeLibs = &bootNativeLibs;
} else if (classLoader->parent->parent == NULL && classLoader->object.clazz->classLoader == NULL) {
// This is the system classloader
nativeLibs = &mainNativeLibs;
} else {
// Unknown classloader
rvmThrowUnsatisfiedLinkError(env, "Unknown classloader");
return FALSE;
}
char* errorMsg = NULL;
DynamicLib* lib = rvmOpenDynamicLib(env, path, &errorMsg);
if (!lib) {
if (!rvmExceptionOccurred(env)) {
rvmThrowUnsatisfiedLinkError(env, errorMsg);
}
return FALSE;
}
obtainNativeLibsLock();
if (rvmHasDynamicLib(env, lib, *nativeLibs)) {
// The lib is already in nativeLibs
rvmCloseDynamicLib(env, lib);
releaseNativeLibsLock();
return TRUE;
}
jint (*JNI_OnLoad)(JavaVM*, void*) = rvmFindDynamicLibSymbol(env, lib, "JNI_OnLoad", FALSE);
if (JNI_OnLoad) {
// TODO: Check that JNI_OnLoad returns a supported JNI version?
JNI_OnLoad(&env->vm->javaVM, NULL);
if (rvmExceptionOccurred(env)) {
releaseNativeLibsLock();
return FALSE;
}
}
rvmAddDynamicLib(env, lib, nativeLibs);
releaseNativeLibsLock();
return TRUE;
}
void* rvmResolveNativeMethodImpl(Env* env, NativeMethod* method, const char* shortMangledName, const char* longMangledName, ClassLoader* classLoader, void** ptr) {
void* f = method->nativeImpl;
if (!f) {
DynamicLib* nativeLibs = NULL;
if (!classLoader || classLoader->parent == NULL) {
// This is the bootstrap classloader
nativeLibs = bootNativeLibs;
} else if (classLoader->parent->parent == NULL && classLoader->object.clazz->classLoader == NULL) {
// This is the system classloader
nativeLibs = mainNativeLibs;
} else {
// Unknown classloader
rvmThrowUnsatisfiedLinkError(env, "Unknown classloader");
return NULL;
}
obtainNativeLibsLock();
TRACEF("Searching for native method using short name: %s", shortMangledName);
f = rvmFindDynamicLibSymbol(env, nativeLibs, shortMangledName, TRUE);
if (f) {
TRACEF("Found native method using short name: %s", shortMangledName);
} else if (strcmp(shortMangledName, longMangledName)) {
TRACEF("Searching for native method using long name: %s", longMangledName);
f = rvmFindDynamicLibSymbol(env, nativeLibs, longMangledName, TRUE);
if (f) {
TRACEF("Found native method using long name: %s", longMangledName);
}
}
method->nativeImpl = f;
releaseNativeLibsLock();
}
if (!f) {
char* className = rvmToBinaryClassName(env, method->method.clazz->name);
if (className) {
rvmThrowNewf(env, java_lang_UnsatisfiedLinkError, "%s.%s%s", className, method->method.name, method->method.desc);
}
return NULL;
}
// TODO: Remember ptr to allow it to be reset when the JNI RegisterNatives/UnregisterNatives functions are called
*ptr = f;
return f;
}
void _bcThrowUnsatisfiedLinkError(Env* env, char* msg) {
ENTER;
rvmThrowUnsatisfiedLinkError(env, msg);
LEAVEV;
}
