com.tc.object.bytecode.rwsync
Class SimpleLockMethodStrategy

java.lang.Object
  com.tc.object.bytecode.rwsync.LockingMethodStrategy
      com.tc.object.bytecode.rwsync.SimpleLockMethodStrategy

All Implemented Interfaces:

Opcodes, MethodStrategy

public class SimpleLockMethodStrategy
extends LockingMethodStrategy

Instrument a method by renaming it and then calling it inside a wrapper method that takes a ReadLock or WriteLock.

MethodStrategy instances are kept in statically initialized tables and reused, so implementations should not contain any mutable state.

Nested Class Summary

Nested classes/interfaces inherited from class com.tc.object.bytecode.rwsync.LockingMethodStrategy

LockingMethodStrategy.LockType

Field Summary

Fields inherited from class com.tc.object.bytecode.rwsync.LockingMethodStrategy

lockField, lockTypeDesc, lockTypeName, THIS$0

Fields inherited from interface com.tc.asm.Opcodes

AALOAD, AASTORE, ACC_ABSTRACT, ACC_ANNOTATION, ACC_BRIDGE, ACC_DEPRECATED, ACC_ENUM, ACC_FINAL, ACC_INTERFACE, ACC_NATIVE, ACC_PRIVATE, ACC_PROTECTED, ACC_PUBLIC, ACC_STATIC, ACC_STRICT, ACC_SUPER, ACC_SYNCHRONIZED, ACC_SYNTHETIC, ACC_TRANSIENT, ACC_VARARGS, ACC_VOLATILE, ACONST_NULL, ALOAD, ANEWARRAY, ARETURN, ARRAYLENGTH, ASTORE, ATHROW, BALOAD, BASTORE, BIPUSH, CALOAD, CASTORE, CHECKCAST, D2F, D2I, D2L, DADD, DALOAD, DASTORE, DCMPG, DCMPL, DCONST_0, DCONST_1, DDIV, DLOAD, DMUL, DNEG, DOUBLE, DREM, DRETURN, DSTORE, DSUB, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, F_APPEND, F_CHOP, F_FULL, F_NEW, F_SAME, F_SAME1, F2D, F2I, F2L, FADD, FALOAD, FASTORE, FCMPG, FCMPL, FCONST_0, FCONST_1, FCONST_2, FDIV, FLOAD, FLOAT, FMUL, FNEG, FREM, FRETURN, FSTORE, FSUB, GETFIELD, GETSTATIC, GOTO, I2B, I2C, I2D, I2F, I2L, I2S, IADD, IALOAD, IAND, IASTORE, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5, ICONST_M1, IDIV, IF_ACMPEQ, IF_ACMPNE, IF_ICMPEQ, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ICMPLT, IF_ICMPNE, IFEQ, IFGE, IFGT, IFLE, IFLT, IFNE, IFNONNULL, IFNULL, IINC, ILOAD, IMUL, INEG, INSTANCEOF, INTEGER, INVOKEDYNAMIC, INVOKEDYNAMIC_OWNER, INVOKEINTERFACE, INVOKESPECIAL, INVOKESTATIC, INVOKEVIRTUAL, IOR, IREM, IRETURN, ISHL, ISHR, ISTORE, ISUB, IUSHR, IXOR, JSR, L2D, L2F, L2I, LADD, LALOAD, LAND, LASTORE, LCMP, LCONST_0, LCONST_1, LDC, LDIV, LLOAD, LMUL, LNEG, LONG, LOOKUPSWITCH, LOR, LREM, LRETURN, LSHL, LSHR, LSTORE, LSUB, LUSHR, LXOR, MONITORENTER, MONITOREXIT, MULTIANEWARRAY, NEW, NEWARRAY, NOP, NULL, POP, POP2, PUTFIELD, PUTSTATIC, RET, RETURN, SALOAD, SASTORE, SIPUSH, SWAP, T_BOOLEAN, T_BYTE, T_CHAR, T_DOUBLE, T_FLOAT, T_INT, T_LONG, T_SHORT, TABLESWITCH, TOP, UNINITIALIZED_THIS, V1_1, V1_2, V1_3, V1_4, V1_5, V1_6, V1_7

Constructor Summary

SimpleLockMethodStrategy(LockingMethodStrategy.LockType lockType)

Method Summary

MethodVisitor

visitMethod(ClassVisitor cv, java.lang.String ownerType, java.lang.String outerType, java.lang.String outerDesc, int access, java.lang.String name, java.lang.String desc, java.lang.String signature, java.lang.String[] exceptions) Instrument a method, possibly creating other methods in the process.

Methods inherited from class com.tc.object.bytecode.rwsync.LockingMethodStrategy

callRenamedMethod, getWrappedAttributes, getWrappedName

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SimpleLockMethodStrategy

public SimpleLockMethodStrategy(LockingMethodStrategy.LockType lockType)

Parameters:

lockField - the name of the field that is the lock. If the method owner is an inner class, the read lock field is assumed to belong to the outer class.

Method Detail

visitMethod

public MethodVisitor visitMethod(ClassVisitor cv,
                                 java.lang.String ownerType,
                                 java.lang.String outerType,
                                 java.lang.String outerDesc,
                                 int access,
                                 java.lang.String name,
                                 java.lang.String desc,
                                 java.lang.String signature,
                                 java.lang.String[] exceptions)

Description copied from interface: MethodStrategy

Instrument a method, possibly creating other methods in the process. A do-nothing implementation might look like:

   visitMethod(...) {
     return cv.visitMethod(access, name, desc, signature, exceptions);
   }
 

This would delegate the visitMethod() call to the next class adapter in the chain, returning a method visitor which could then be visited with the method's contents.

Parameters:

cv - a way of calling the next class adapter in the chain. Do not pass in the samed ClassVisitor that is invoking the method strategy, or you'll recurse endlessly! Note that cv.visitMethod may be called more than once during a single call to this method, and must return a distinct MethodVisitor instance for each call.

ownerType - the internal type name of the class that contains the method, e.g., "org/xyz/Foo$Bar"

outerType - null if ownerType is a top-level type, or else the internal type name of its outer class e.g. "org/xyz/Foo"

outerDesc - null if ownerType is a top-level type, or else the type descriptor of its outer class, e.g. "Lorg/xyz/Foo;"

Returns:

a method visitor which can be called with the contents of the original method. Implementations must not return null, but may return a visitor that ignores all calls.