301 @ForceInline
302 public void putAddress(Object o, long offset, long x) {
303 if (ADDRESS_SIZE == 4) {
304 putInt(o, offset, (int)x);
305 } else {
306 putLong(o, offset, x);
307 }
308 }
309
310 // These read VM internal data.
311
312 /**
313 * Fetches an uncompressed reference value from a given native variable
314 * ignoring the VM's compressed references mode.
315 *
316 * @param address a memory address locating the variable
317 * @return the value fetched from the indicated native variable
318 */
319 public native Object getUncompressedObject(long address);
320
321 /**
322 * Fetches the {@link java.lang.Class} Java mirror for the given native
323 * metaspace {@code Klass} pointer.
324 *
325 * @param metaspaceKlass a native metaspace {@code Klass} pointer
326 * @return the {@link java.lang.Class} Java mirror
327 */
328 public native Class<?> getJavaMirror(long metaspaceKlass);
329
330 /**
331 * Fetches a native metaspace {@code Klass} pointer for the given Java
332 * object.
333 *
334 * @param o Java heap object for which to fetch the class pointer
335 * @return a native metaspace {@code Klass} pointer
336 */
337 public native long getKlassPointer(Object o);
338
339 // These work on values in the C heap.
340
341 /**
342 * Fetches a value from a given memory address. If the address is zero, or
343 * does not point into a block obtained from {@link #allocateMemory}, the
344 * results are undefined.
345 *
346 * @see #allocateMemory
347 */
348 @ForceInline
349 public byte getByte(long address) {
350 return getByte(null, address);
351 }
352
353 /**
354 * Stores a value into a given memory address. If the address is zero, or
355 * does not point into a block obtained from {@link #allocateMemory}, the
356 * results are undefined.
357 *
358 * @see #getByte(long)
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301 @ForceInline
302 public void putAddress(Object o, long offset, long x) {
303 if (ADDRESS_SIZE == 4) {
304 putInt(o, offset, (int)x);
305 } else {
306 putLong(o, offset, x);
307 }
308 }
309
310 // These read VM internal data.
311
312 /**
313 * Fetches an uncompressed reference value from a given native variable
314 * ignoring the VM's compressed references mode.
315 *
316 * @param address a memory address locating the variable
317 * @return the value fetched from the indicated native variable
318 */
319 public native Object getUncompressedObject(long address);
320
321 // These work on values in the C heap.
322
323 /**
324 * Fetches a value from a given memory address. If the address is zero, or
325 * does not point into a block obtained from {@link #allocateMemory}, the
326 * results are undefined.
327 *
328 * @see #allocateMemory
329 */
330 @ForceInline
331 public byte getByte(long address) {
332 return getByte(null, address);
333 }
334
335 /**
336 * Stores a value into a given memory address. If the address is zero, or
337 * does not point into a block obtained from {@link #allocateMemory}, the
338 * results are undefined.
339 *
340 * @see #getByte(long)
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