removed in 8u152 patch

Jvmti GetLoadedClasses collects classes from classloaders
in java8 while java7 collects it from SystemDictionary. Dcevm7/8
holds only new classes in Dictionary while classloader holds
all versions including old one. Therefore dcevm8 must return
only new version in jvmti getLoadedClasses.

Flag is used to specify set of packages to be deoptimized after class redefinition.
By default all classes are redefined that leads to performance drop.

Patch for jdk7u85 is applicable on jdk7u111 as well. Dcevm for
jdk7u85 is binary compatible up to jdk7u99. The binary compatibility
for newer java7 versions is broken therefore dcevm for jdk7u111 is
necessarry. Same for jdk8u102 and higher.

Patch for jdk7u85 is applicable on jdk7u111 as well. Dcevm for jdk7u85
is binary compatible up to jdk7u99. The binary compatibility for newer
java7 versions is broken therefore dcevm for jdk7u111 is necessarry.

Patch for jdk7u85 is applicable on jdk7u111 as well. Dcevm for jdk7u85
is binary compatible up to jdk7u99. The binary compatibility for newer
java7 versions is broken therefore dcevm for jdk7u111 is necessarry.

Seems like f1 is still sometimes uses (in field scenario?) even though we zero bytecode, so it should be re-resolved.

fixes #94

should be compatible with 7u91 too

should be compatible with 7u91 too

closes #81

Clear constant pool cache entries which are related to
invokehandle/invokedynamic and ones which are unresolved
(have both bytecodes set to 0).

There are two cases when such entries could be non-empty
(have data in f1/f2):
  1. invokedynamic/invokehandle-related entries in which f2 was
     set during constant pool cache initialization.
  2. put/get into static field when class having the field
     is not initialized yet.

Previously, we didn't clear such entries as clearing f2 in
first case results in crash. However, if we don't clear f1
in the second case, we will not be able to initialize class
for the second time (to re-create all enum constants, for
example) as non-empty f2 will cause assertion to fail.

The current implementation uses free bit in constant pool cache
entry to mark all entries with resolved indices (case #1).
The clearing code preserves f2 for all such entries.