Out of curiosity, I looked at JAR files in all RPMs in Fedora rawhide
(the development version of Fedora that will turn into Fedora 21) and
counted the number of RPM packages which had Java classes referencing
individual methods in sun.misc.Unsafe. The attached table is sorted by
decreasing package count, and grouped by method name and descriptor.
These numbers do not include references through reflection, for obvious
reasons.
Java programming practices are sometimes at odds with distribution
packaging, and due to licensing bias, the Fedora repository might not be
representative of the general Java ecosystem. However, the statistics
cover 1177 Java source RPMs containing 550829 classes in 570477
versions, so it's quite a bit of code, despite the fairly low number of
references to sun.misc.Unsafe.
--
Florian Weimer / Red Hat Product Security Team
name | descriptor
| count
----------------------+------------------------------------------------------------+-------
objectFieldOffset | (Ljava/lang/reflect/Field;)J
| 17
arrayBaseOffset | (Ljava/lang/Class;)I
| 14
putObject | (Ljava/lang/Object;JLjava/lang/Object;)V
| 12
arrayIndexScale | (Ljava/lang/Class;)I
| 11
getLong | (Ljava/lang/Object;J)J
| 11
compareAndSwapInt | (Ljava/lang/Object;JII)Z
| 9
compareAndSwapLong | (Ljava/lang/Object;JJJ)Z
| 9
getUnsafe | ()Lsun/misc/Unsafe;
| 9
compareAndSwapObject |
(Ljava/lang/Object;JLjava/lang/Object;Ljava/lang/Object;)Z | 8
getObject | (Ljava/lang/Object;J)Ljava/lang/Object;
| 8
getInt | (Ljava/lang/Object;J)I
| 7
putInt | (Ljava/lang/Object;JI)V
| 6
putLong | (Ljava/lang/Object;JJ)V
| 6
getObjectVolatile | (Ljava/lang/Object;J)Ljava/lang/Object;
| 5
putBoolean | (Ljava/lang/Object;JZ)V
| 5
putByte | (Ljava/lang/Object;JB)V
| 5
putChar | (Ljava/lang/Object;JC)V
| 5
putDouble | (Ljava/lang/Object;JD)V
| 5
putFloat | (Ljava/lang/Object;JF)V
| 5
putObjectVolatile | (Ljava/lang/Object;JLjava/lang/Object;)V
| 5
putOrderedObject | (Ljava/lang/Object;JLjava/lang/Object;)V
| 5
putShort | (Ljava/lang/Object;JS)V
| 5
getBoolean | (Ljava/lang/Object;J)Z
| 4
getByte | (Ljava/lang/Object;J)B
| 4
getChar | (Ljava/lang/Object;J)C
| 4
getDouble | (Ljava/lang/Object;J)D
| 4
getFloat | (Ljava/lang/Object;J)F
| 4
getInt | (J)I
| 4
getLong | (J)J
| 4
getShort | (J)S
| 4
getShort | (Ljava/lang/Object;J)S
| 4
park | (ZJ)V
| 4
putInt | (JI)V
| 4
putLong | (JJ)V
| 4
putShort | (JS)V
| 4
throwException | (Ljava/lang/Throwable;)V
| 4
unpark | (Ljava/lang/Object;)V
| 4
copyMemory | (JJJ)V
| 3
copyMemory | (Ljava/lang/Object;JLjava/lang/Object;JJ)V
| 3
getByte | (J)B
| 3
putByte | (JB)V
| 3
putOrderedInt | (Ljava/lang/Object;JI)V
| 3
allocateInstance | (Ljava/lang/Class;)Ljava/lang/Object;
| 2
defineClass | (Ljava/lang/String;[BII)Ljava/lang/Class;
| 2
getDouble | (J)D
| 2
getFloat | (J)F
| 2
putDouble | (JD)V
| 2
putFloat | (JF)V
| 2
addressSize | ()I
| 1
getLong | (Ljava/lang/Object;I)J
| 1
monitorEnter | (Ljava/lang/Object;)V
| 1
monitorExit | (Ljava/lang/Object;)V
| 1
setMemory | (JJB)V
| 1
(53 rows)
