src/java.base/share/native/libjava/Class.c
changeset 47216 71c04702a3d5
parent 37363 329dba26ffd2
child 50735 2f2af62dfac7
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/share/native/libjava/Class.c	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,185 @@
+/*
+ * Copyright (c) 1994, 2014, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*-
+ *      Implementation of class Class
+ *
+ *      former threadruntime.c, Sun Sep 22 12:09:39 1991
+ */
+
+#include <string.h>
+#include <stdlib.h>
+
+#include "jni.h"
+#include "jni_util.h"
+#include "jvm.h"
+#include "java_lang_Class.h"
+
+/* defined in libverify.so/verify.dll (src file common/check_format.c) */
+extern jboolean VerifyClassname(char *utf_name, jboolean arrayAllowed);
+extern jboolean VerifyFixClassname(char *utf_name);
+
+#define OBJ "Ljava/lang/Object;"
+#define CLS "Ljava/lang/Class;"
+#define CPL "Ljdk/internal/reflect/ConstantPool;"
+#define STR "Ljava/lang/String;"
+#define FLD "Ljava/lang/reflect/Field;"
+#define MHD "Ljava/lang/reflect/Method;"
+#define CTR "Ljava/lang/reflect/Constructor;"
+#define PD  "Ljava/security/ProtectionDomain;"
+#define BA  "[B"
+
+static JNINativeMethod methods[] = {
+    {"getName0",         "()" STR,          (void *)&JVM_GetClassName},
+    {"getSuperclass",    "()" CLS,          NULL},
+    {"getInterfaces0",   "()[" CLS,         (void *)&JVM_GetClassInterfaces},
+    {"isInterface",      "()Z",             (void *)&JVM_IsInterface},
+    {"getSigners",       "()[" OBJ,         (void *)&JVM_GetClassSigners},
+    {"setSigners",       "([" OBJ ")V",     (void *)&JVM_SetClassSigners},
+    {"isArray",          "()Z",             (void *)&JVM_IsArrayClass},
+    {"isPrimitive",      "()Z",             (void *)&JVM_IsPrimitiveClass},
+    {"getModifiers",     "()I",             (void *)&JVM_GetClassModifiers},
+    {"getDeclaredFields0","(Z)[" FLD,       (void *)&JVM_GetClassDeclaredFields},
+    {"getDeclaredMethods0","(Z)[" MHD,      (void *)&JVM_GetClassDeclaredMethods},
+    {"getDeclaredConstructors0","(Z)[" CTR, (void *)&JVM_GetClassDeclaredConstructors},
+    {"getProtectionDomain0", "()" PD,       (void *)&JVM_GetProtectionDomain},
+    {"getDeclaredClasses0",  "()[" CLS,      (void *)&JVM_GetDeclaredClasses},
+    {"getDeclaringClass0",   "()" CLS,      (void *)&JVM_GetDeclaringClass},
+    {"getSimpleBinaryName0", "()" STR,      (void *)&JVM_GetSimpleBinaryName},
+    {"getGenericSignature0", "()" STR,      (void *)&JVM_GetClassSignature},
+    {"getRawAnnotations",      "()" BA,        (void *)&JVM_GetClassAnnotations},
+    {"getConstantPool",     "()" CPL,       (void *)&JVM_GetClassConstantPool},
+    {"desiredAssertionStatus0","("CLS")Z",(void *)&JVM_DesiredAssertionStatus},
+    {"getEnclosingMethod0", "()[" OBJ,      (void *)&JVM_GetEnclosingMethodInfo},
+    {"getRawTypeAnnotations", "()" BA,      (void *)&JVM_GetClassTypeAnnotations},
+};
+
+#undef OBJ
+#undef CLS
+#undef STR
+#undef FLD
+#undef MHD
+#undef CTR
+#undef PD
+
+JNIEXPORT void JNICALL
+Java_java_lang_Class_registerNatives(JNIEnv *env, jclass cls)
+{
+    methods[1].fnPtr = (void *)(*env)->GetSuperclass;
+    (*env)->RegisterNatives(env, cls, methods,
+                            sizeof(methods)/sizeof(JNINativeMethod));
+}
+
+JNIEXPORT jclass JNICALL
+Java_java_lang_Class_forName0(JNIEnv *env, jclass this, jstring classname,
+                              jboolean initialize, jobject loader, jclass caller)
+{
+    char *clname;
+    jclass cls = 0;
+    char buf[128];
+    jsize len;
+    jsize unicode_len;
+
+    if (classname == NULL) {
+        JNU_ThrowNullPointerException(env, 0);
+        return 0;
+    }
+
+    len = (*env)->GetStringUTFLength(env, classname);
+    unicode_len = (*env)->GetStringLength(env, classname);
+    if (len >= (jsize)sizeof(buf)) {
+        clname = malloc(len + 1);
+        if (clname == NULL) {
+            JNU_ThrowOutOfMemoryError(env, NULL);
+            return NULL;
+        }
+    } else {
+        clname = buf;
+    }
+    (*env)->GetStringUTFRegion(env, classname, 0, unicode_len, clname);
+
+    if (VerifyFixClassname(clname) == JNI_TRUE) {
+        /* slashes present in clname, use name b4 translation for exception */
+        (*env)->GetStringUTFRegion(env, classname, 0, unicode_len, clname);
+        JNU_ThrowClassNotFoundException(env, clname);
+        goto done;
+    }
+
+    if (!VerifyClassname(clname, JNI_TRUE)) {  /* expects slashed name */
+        JNU_ThrowClassNotFoundException(env, clname);
+        goto done;
+    }
+
+    cls = JVM_FindClassFromCaller(env, clname, initialize, loader, caller);
+
+ done:
+    if (clname != buf) {
+        free(clname);
+    }
+    return cls;
+}
+
+JNIEXPORT jboolean JNICALL
+Java_java_lang_Class_isInstance(JNIEnv *env, jobject cls, jobject obj)
+{
+    if (obj == NULL) {
+        return JNI_FALSE;
+    }
+    return (*env)->IsInstanceOf(env, obj, (jclass)cls);
+}
+
+JNIEXPORT jboolean JNICALL
+Java_java_lang_Class_isAssignableFrom(JNIEnv *env, jobject cls, jobject cls2)
+{
+    if (cls2 == NULL) {
+        JNU_ThrowNullPointerException(env, 0);
+        return JNI_FALSE;
+    }
+    return (*env)->IsAssignableFrom(env, cls2, cls);
+}
+
+JNIEXPORT jclass JNICALL
+Java_java_lang_Class_getPrimitiveClass(JNIEnv *env,
+                                       jclass cls,
+                                       jstring name)
+{
+    const char *utfName;
+    jclass result;
+
+    if (name == NULL) {
+        JNU_ThrowNullPointerException(env, 0);
+        return NULL;
+    }
+
+    utfName = (*env)->GetStringUTFChars(env, name, 0);
+    if (utfName == 0)
+        return NULL;
+
+    result = JVM_FindPrimitiveClass(env, utfName);
+
+    (*env)->ReleaseStringUTFChars(env, name, utfName);
+
+    return result;
+}