hotspot/agent/src/share/classes/sun/jvm/hotspot/interpreter/BytecodeWithCPIndex.java
6939203: JSR 292 needs method handle constants
Summary: Add new CP types CONSTANT_MethodHandle, CONSTANT_MethodType; extend 'ldc' bytecode.
Reviewed-by: twisti, never
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package sun.jvm.hotspot.interpreter;
import sun.jvm.hotspot.oops.*;
import sun.jvm.hotspot.runtime.*;
// any bytecode with constant pool index
public abstract class BytecodeWithCPIndex extends Bytecode {
BytecodeWithCPIndex(Method method, int bci) {
super(method, bci);
}
// the constant pool index for this bytecode
public int index() { return 0xFFFF & javaShortAt(1); }
public int getSecondaryIndex() {
throw new IllegalArgumentException("must be invokedynamic");
}
protected int indexForFieldOrMethod() {
ConstantPoolCache cpCache = method().getConstants().getCache();
// get ConstantPool index from ConstantPoolCacheIndex at given bci
int cpCacheIndex = index();
if (cpCache == null) {
return cpCacheIndex;
} else if (code() == Bytecodes._invokedynamic) {
int secondaryIndex = getSecondaryIndex();
return cpCache.getMainEntryAt(secondaryIndex).getConstantPoolIndex();
} else {
// change byte-ordering and go via cache
return cpCache.getEntryAt((int) (0xFFFF & VM.getVM().getBytes().swapShort((short) cpCacheIndex))).getConstantPoolIndex();
}
}
}