Avoid polymorphic dispatch over JNI

When linked statically on GraalVM, JNI symbols declared in the
overloaded form cannot be resolved. Luckily, all of `Native`'s
callsites are in `Pointer` or itself, and all `native` methods
of `Native` are non-public.

This PR adjusts the JNA C API to avoid using overloaded `read`,
`write`, or `getDirectByteBuffer`. Callsites are amended in
`Pointer` accordingly.

Signed-off-by: Sam Gammon <[email protected]>
Signed-off-by: Dario Valdespino <[email protected]>

Author: sgammon

common.xml

@@ -27,7 +27,7 @@
     <property name="jni.revision" value="2"/>
     <property name="jni.build" value="0"/> <!--${build.number}-->
     <property name="jni.version" value="${jni.major}.${jni.minor}.${jni.revision}"/>
-    <property name="jni.md5" value="eea709d4f4531903eb04ab51ff3840ce"/>
+    <property name="jni.md5" value="2758dad3ef270c95b39b70ca30de3941"/>
     <property name="spec.title" value="Java Native Access (JNA)"/>
     <property name="spec.vendor" value="${vendor}"/>
     <property name="spec.version" value="${jna.major}"/>

native/dispatch.c

@@ -2334,10 +2334,10 @@ Java_com_sun_jna_Native_findSymbol(JNIEnv *env, jclass UNUSED(cls),
 
 /*
  * Class:     com_sun_jna_Native
- * Method:    write
+ * Method:    writeBytes
  * Signature: (Lcom/sun/jna/Pointer;JJ[BII)V
  */
-JNIEXPORT void JNICALL Java_com_sun_jna_Native_write__Lcom_sun_jna_Pointer_2JJ_3BII
+JNIEXPORT void JNICALL Java_com_sun_jna_Native_writeBytes
 (JNIEnv *env, jclass UNUSED(cls), jobject UNUSED(pointer), jlong addr, jlong offset, jbyteArray arr, jint off, jint n)
 {
   PSTART();
@@ -2347,21 +2347,21 @@ JNIEXPORT void JNICALL Java_com_sun_jna_Native_write__Lcom_sun_jna_Pointer_2JJ_3
 
 /*
  * Class:     com_sun_jna_Native
- * Method:    write
+ * Method:    writeChars
  * Signature: (Lcom/sun/jna/Pointer;JJ[CII)V
  */
-JNIEXPORT void JNICALL Java_com_sun_jna_Native_write__Lcom_sun_jna_Pointer_2JJ_3CII
+JNIEXPORT void JNICALL Java_com_sun_jna_Native_writeChars
 (JNIEnv *env, jclass UNUSED(cls), jobject UNUSED(pointer), jlong addr, jlong offset, jcharArray arr, jint off, jint n)
 {
   getChars(env, (wchar_t*)L2A(addr + offset), arr, off, n);
 }
 
 /*
  * Class:     com_sun_jna_Native
- * Method:    write
+ * Method:    writeDoubles
  * Signature: (Lcom/sun/jna/Pointer;JJ[DII)V
  */
-JNIEXPORT void JNICALL Java_com_sun_jna_Native_write__Lcom_sun_jna_Pointer_2JJ_3DII
+JNIEXPORT void JNICALL Java_com_sun_jna_Native_writeDoubles
 (JNIEnv *env, jclass UNUSED(cls), jobject UNUSED(pointer), jlong addr, jlong offset, jdoubleArray arr, jint off, jint n)
 {
   PSTART();
@@ -2371,10 +2371,10 @@ JNIEXPORT void JNICALL Java_com_sun_jna_Native_write__Lcom_sun_jna_Pointer_2JJ_3
 
 /*
  * Class:     com_sun_jna_Native
- * Method:    write
+ * Method:    writeFloats
  * Signature: (Lcom/sun/jna/Pointer;JJ[FII)V
  */
-JNIEXPORT void JNICALL Java_com_sun_jna_Native_write__Lcom_sun_jna_Pointer_2JJ_3FII
+JNIEXPORT void JNICALL Java_com_sun_jna_Native_writeFloats
 (JNIEnv *env, jclass UNUSED(cls), jobject UNUSED(pointer), jlong addr, jlong offset, jfloatArray arr, jint off, jint n)
 {
   PSTART();
@@ -2384,10 +2384,10 @@ JNIEXPORT void JNICALL Java_com_sun_jna_Native_write__Lcom_sun_jna_Pointer_2JJ_3
 
 /*
  * Class:     com_sun_jna_Native
- * Method:    write
+ * Method:    writeInts
  * Signature: (Lcom/sun/jna/Pointer;JJ[III)V
  */
-JNIEXPORT void JNICALL Java_com_sun_jna_Native_write__Lcom_sun_jna_Pointer_2JJ_3III
+JNIEXPORT void JNICALL Java_com_sun_jna_Native_writeInts
 (JNIEnv *env, jclass UNUSED(cls), jobject UNUSED(pointer), jlong addr, jlong offset, jintArray arr, jint off, jint n)
 {
   PSTART();
@@ -2397,10 +2397,10 @@ JNIEXPORT void JNICALL Java_com_sun_jna_Native_write__Lcom_sun_jna_Pointer_2JJ_3
 
 /*
  * Class:     com_sun_jna_Native
- * Method:    write
+ * Method:    writeLongs
  * Signature: (Lcom/sun/jna/Pointer;JJ[JII)V
  */
-JNIEXPORT void JNICALL Java_com_sun_jna_Native_write__Lcom_sun_jna_Pointer_2JJ_3JII
+JNIEXPORT void JNICALL Java_com_sun_jna_Native_writeLongs
 (JNIEnv *env, jclass UNUSED(cls), jobject UNUSED(pointer), jlong addr, jlong offset, jlongArray arr, jint off, jint n)
 {
   PSTART();
@@ -2410,10 +2410,10 @@ JNIEXPORT void JNICALL Java_com_sun_jna_Native_write__Lcom_sun_jna_Pointer_2JJ_3
 
 /*
  * Class:     com_sun_jna_Native
- * Method:    write
+ * Method:    writeShorts
  * Signature: (Lcom/sun/jna/Pointer;JJ[SII)V
  */
-JNIEXPORT void JNICALL Java_com_sun_jna_Native_write__Lcom_sun_jna_Pointer_2JJ_3SII
+JNIEXPORT void JNICALL Java_com_sun_jna_Native_writeShorts
 (JNIEnv *env, jclass UNUSED(cls), jobject UNUSED(pointer), jlong addr, jlong offset, jshortArray arr, jint off, jint n)
 {
   PSTART();
@@ -2445,10 +2445,10 @@ JNIEXPORT jlong JNICALL Java_com_sun_jna_Native_indexOf
 
 /*
  * Class:     com_sun_jna_Native
- * Method:    read
+ * Method:    readBytes
  * Signature: (Lcom/sun/jna/Pointer;JJ[BII)V
  */
-JNIEXPORT void JNICALL Java_com_sun_jna_Native_read__Lcom_sun_jna_Pointer_2JJ_3BII
+JNIEXPORT void JNICALL Java_com_sun_jna_Native_readBytes
 (JNIEnv *env, jclass UNUSED(cls), jobject UNUSED(pointer), jlong addr, jlong offset, jbyteArray arr, jint off, jint n)
 {
   PSTART();
@@ -2458,21 +2458,21 @@ JNIEXPORT void JNICALL Java_com_sun_jna_Native_read__Lcom_sun_jna_Pointer_2JJ_3B
 
 /*
  * Class:     com_sun_jna_Native
- * Method:    read
+ * Method:    readChars
  * Signature: (Lcom/sun/jna/Pointer;JJ[CII)V
  */
-JNIEXPORT void JNICALL Java_com_sun_jna_Native_read__Lcom_sun_jna_Pointer_2JJ_3CII
+JNIEXPORT void JNICALL Java_com_sun_jna_Native_readChars
     (JNIEnv *env, jclass UNUSED(cls), jobject UNUSED(pointer), jlong addr, jlong offset, jcharArray arr, jint off, jint n)
 {
   setChars(env, (wchar_t*)L2A(addr + offset), arr, off, n);
 }
 
 /*
  * Class:     com_sun_jna_Native
- * Method:    read
+ * Method:    readDoubles
  * Signature: (Lcom/sun/jna/Pointer;JJ[DII)V
  */
-JNIEXPORT void JNICALL Java_com_sun_jna_Native_read__Lcom_sun_jna_Pointer_2JJ_3DII
+JNIEXPORT void JNICALL Java_com_sun_jna_Native_readDoubles
     (JNIEnv *env, jclass UNUSED(cls), jobject UNUSED(pointer), jlong addr, jlong offset, jdoubleArray arr, jint off, jint n)
 {
   PSTART();
@@ -2482,10 +2482,10 @@ JNIEXPORT void JNICALL Java_com_sun_jna_Native_read__Lcom_sun_jna_Pointer_2JJ_3D
 
 /*
  * Class:     com_sun_jna_Native
- * Method:    read
+ * Method:    readFloats
  * Signature: (Lcom/sun/jna/Pointer;JJ[FII)V
  */
-JNIEXPORT void JNICALL Java_com_sun_jna_Native_read__Lcom_sun_jna_Pointer_2JJ_3FII
+JNIEXPORT void JNICALL Java_com_sun_jna_Native_readFloats
     (JNIEnv *env, jclass UNUSED(cls), jobject UNUSED(pointer), jlong addr, jlong offset, jfloatArray arr, jint off, jint n)
 {
   PSTART();
@@ -2495,10 +2495,10 @@ JNIEXPORT void JNICALL Java_com_sun_jna_Native_read__Lcom_sun_jna_Pointer_2JJ_3F
 
 /*
  * Class:     com_sun_jna_Native
- * Method:    read
+ * Method:    readInts
  * Signature: (Lcom/sun/jna/Pointer;JJ[III)V
  */
-JNIEXPORT void JNICALL Java_com_sun_jna_Native_read__Lcom_sun_jna_Pointer_2JJ_3III
+JNIEXPORT void JNICALL Java_com_sun_jna_Native_readInts
     (JNIEnv *env, jclass UNUSED(cls), jobject UNUSED(pointer), jlong addr, jlong offset, jintArray arr, jint off, jint n)
 {
   PSTART();
@@ -2508,10 +2508,10 @@ JNIEXPORT void JNICALL Java_com_sun_jna_Native_read__Lcom_sun_jna_Pointer_2JJ_3I
 
 /*
  * Class:     com_sun_jna_Native
- * Method:    read
+ * Method:    readLongs
  * Signature: (Lcom/sun/jna/Pointer;JJ[JII)V
  */
-JNIEXPORT void JNICALL Java_com_sun_jna_Native_read__Lcom_sun_jna_Pointer_2JJ_3JII
+JNIEXPORT void JNICALL Java_com_sun_jna_Native_readLongs
     (JNIEnv *env, jclass UNUSED(cls), jobject UNUSED(pointer), jlong addr, jlong offset, jlongArray arr, jint off, jint n)
 {
   PSTART();
@@ -2521,10 +2521,10 @@ JNIEXPORT void JNICALL Java_com_sun_jna_Native_read__Lcom_sun_jna_Pointer_2JJ_3J
 
 /*
  * Class:     com_sun_jna_Native
- * Method:    read
+ * Method:    readShorts
  * Signature: (Lcom/sun/jna/Pointer;JJ[SII)V
  */
-JNIEXPORT void JNICALL Java_com_sun_jna_Native_read__Lcom_sun_jna_Pointer_2JJ_3SII
+JNIEXPORT void JNICALL Java_com_sun_jna_Native_readShorts
     (JNIEnv *env, jclass UNUSED(cls), jobject UNUSED(pointer), jlong addr, jlong offset, jshortArray arr, jint off, jint n)
 {
   PSTART();
@@ -2576,7 +2576,7 @@ JNIEXPORT jlong JNICALL Java_com_sun_jna_Native__1getPointer
  * Method:    getDirectByteBuffer
  * Signature: (Lcom/sun/jna/Pointer;JJJ)Ljava/nio/ByteBuffer;
  */
-JNIEXPORT jobject JNICALL Java_com_sun_jna_Native_getDirectByteBuffer__Lcom_sun_jna_Pointer_2JJJ
+JNIEXPORT jobject JNICALL Java_com_sun_jna_Native_getDirectByteBuffer
     (JNIEnv *env, jclass UNUSED(cls), jobject UNUSED(pointer), jlong addr, jlong offset, jlong length)
 {
 #ifdef NO_NIO_BUFFERS

src/com/sun/jna/Native.java

@@ -2229,33 +2229,33 @@ static long open(String name) {
      */
     static native long indexOf(Pointer pointer, long baseaddr, long offset, byte value);
 
-    static native void read(Pointer pointer, long baseaddr, long offset, byte[] buf, int index, int length);
+    static native void readBytes(Pointer pointer, long baseaddr, long offset, byte[] buf, int index, int length);
 
-    static native void read(Pointer pointer, long baseaddr, long offset, short[] buf, int index, int length);
+    static native void readShorts(Pointer pointer, long baseaddr, long offset, short[] buf, int index, int length);
 
-    static native void read(Pointer pointer, long baseaddr, long offset, char[] buf, int index, int length);
+    static native void readChars(Pointer pointer, long baseaddr, long offset, char[] buf, int index, int length);
 
-    static native void read(Pointer pointer, long baseaddr, long offset, int[] buf, int index, int length);
+    static native void readInts(Pointer pointer, long baseaddr, long offset, int[] buf, int index, int length);
 
-    static native void read(Pointer pointer, long baseaddr, long offset, long[] buf, int index, int length);
+    static native void readLongs(Pointer pointer, long baseaddr, long offset, long[] buf, int index, int length);
 
-    static native void read(Pointer pointer, long baseaddr, long offset, float[] buf, int index, int length);
+    static native void readFloats(Pointer pointer, long baseaddr, long offset, float[] buf, int index, int length);
 
-    static native void read(Pointer pointer, long baseaddr, long offset, double[] buf, int index, int length);
+    static native void readDoubles(Pointer pointer, long baseaddr, long offset, double[] buf, int index, int length);
 
-    static native void write(Pointer pointer, long baseaddr, long offset, byte[] buf, int index, int length);
+    static native void writeBytes(Pointer pointer, long baseaddr, long offset, byte[] buf, int index, int length);
 
-    static native void write(Pointer pointer, long baseaddr, long offset, short[] buf, int index, int length);
+    static native void writeShorts(Pointer pointer, long baseaddr, long offset, short[] buf, int index, int length);
 
-    static native void write(Pointer pointer, long baseaddr, long offset, char[] buf, int index, int length);
+    static native void writeChars(Pointer pointer, long baseaddr, long offset, char[] buf, int index, int length);
 
-    static native void write(Pointer pointer, long baseaddr, long offset, int[] buf, int index, int length);
+    static native void writeInts(Pointer pointer, long baseaddr, long offset, int[] buf, int index, int length);
 
-    static native void write(Pointer pointer, long baseaddr, long offset, long[] buf, int index, int length);
+    static native void writeLongs(Pointer pointer, long baseaddr, long offset, long[] buf, int index, int length);
 
-    static native void write(Pointer pointer, long baseaddr, long offset, float[] buf, int index, int length);
+    static native void writeFloats(Pointer pointer, long baseaddr, long offset, float[] buf, int index, int length);
 
-    static native void write(Pointer pointer, long baseaddr, long offset, double[] buf, int index, int length);
+    static native void writeDoubles(Pointer pointer, long baseaddr, long offset, double[] buf, int index, int length);
 
     static native byte getByte(Pointer pointer, long baseaddr, long offset);
 

src/com/sun/jna/Pointer.java

@@ -137,7 +137,7 @@ public long indexOf(long offset, byte value) {
      * @param length number of elements from native pointer that must be copied
      */
     public void read(long offset, byte[] buf, int index, int length) {
-        Native.read(this, this.peer, offset, buf, index, length);
+        Native.readBytes(this, this.peer, offset, buf, index, length);
     }
 
     /**
@@ -150,7 +150,7 @@ public void read(long offset, byte[] buf, int index, int length) {
      * @param length number of elements from native pointer that must be copied
      */
     public void read(long offset, short[] buf, int index, int length) {
-        Native.read(this, this.peer, offset, buf, index, length);
+        Native.readShorts(this, this.peer, offset, buf, index, length);
     }
 
     /**
@@ -163,7 +163,7 @@ public void read(long offset, short[] buf, int index, int length) {
      * @param length number of elements from native pointer that must be copied
      */
     public void read(long offset, char[] buf, int index, int length) {
-        Native.read(this, this.peer, offset, buf, index, length);
+        Native.readChars(this, this.peer, offset, buf, index, length);
     }
 
     /**
@@ -176,7 +176,7 @@ public void read(long offset, char[] buf, int index, int length) {
      * @param length number of elements from native pointer that must be copied
      */
     public void read(long offset, int[] buf, int index, int length) {
-        Native.read(this, this.peer, offset, buf, index, length);
+        Native.readInts(this, this.peer, offset, buf, index, length);
     }
 
     /**
@@ -189,7 +189,7 @@ public void read(long offset, int[] buf, int index, int length) {
      * @param length number of elements from native pointer that must be copied
      */
     public void read(long offset, long[] buf, int index, int length) {
-        Native.read(this, this.peer, offset, buf, index, length);
+        Native.readLongs(this, this.peer, offset, buf, index, length);
     }
 
     /**
@@ -202,7 +202,7 @@ public void read(long offset, long[] buf, int index, int length) {
      * @param length number of elements from native pointer that must be copied
      */
     public void read(long offset, float[] buf, int index, int length) {
-        Native.read(this, this.peer, offset, buf, index, length);
+        Native.readFloats(this, this.peer, offset, buf, index, length);
     }
 
     /**
@@ -215,7 +215,7 @@ public void read(long offset, float[] buf, int index, int length) {
      * @param length number of elements from native pointer that must be copied
      */
     public void read(long offset, double[] buf, int index, int length) {
-        Native.read(this, this.peer, offset, buf, index, length);
+        Native.readDoubles(this, this.peer, offset, buf, index, length);
     }
 
     /**
@@ -254,7 +254,7 @@ public void read(long offset, Pointer[] buf, int index, int length) {
      *               copied
      */
     public void write(long offset, byte[] buf, int index, int length) {
-        Native.write(this, this.peer, offset, buf, index, length);
+        Native.writeBytes(this, this.peer, offset, buf, index, length);
     }
 
     /**
@@ -268,7 +268,7 @@ public void write(long offset, byte[] buf, int index, int length) {
      *               copied
      */
     public void write(long offset, short[] buf, int index, int length) {
-        Native.write(this, this.peer, offset, buf, index, length);
+        Native.writeShorts(this, this.peer, offset, buf, index, length);
     }
 
     /**
@@ -282,7 +282,7 @@ public void write(long offset, short[] buf, int index, int length) {
      *               copied
      */
     public void write(long offset, char[] buf, int index, int length) {
-        Native.write(this, this.peer, offset, buf, index, length);
+        Native.writeChars(this, this.peer, offset, buf, index, length);
     }
 
     /**
@@ -296,7 +296,7 @@ public void write(long offset, char[] buf, int index, int length) {
      *               copied
      */
     public void write(long offset, int[] buf, int index, int length) {
-        Native.write(this, this.peer, offset, buf, index, length);
+        Native.writeInts(this, this.peer, offset, buf, index, length);
     }
 
     /**
@@ -310,7 +310,7 @@ public void write(long offset, int[] buf, int index, int length) {
      *               copied
      */
     public void write(long offset, long[] buf, int index, int length) {
-        Native.write(this, this.peer, offset, buf, index, length);
+        Native.writeLongs(this, this.peer, offset, buf, index, length);
     }
 
     /**
@@ -324,7 +324,7 @@ public void write(long offset, long[] buf, int index, int length) {
      *               copied
      */
     public void write(long offset, float[] buf, int index, int length) {
-        Native.write(this, this.peer, offset, buf, index, length);
+        Native.writeFloats(this, this.peer, offset, buf, index, length);
     }
 
     /**
@@ -338,7 +338,7 @@ public void write(long offset, float[] buf, int index, int length) {
      *               copied
      */
     public void write(long offset, double[] buf, int index, int length) {
-        Native.write(this, this.peer, offset, buf, index, length);
+        Native.writeDoubles(this, this.peer, offset, buf, index, length);
     }
 
     /** Write the given array of Pointer to native memory.