| org.objectweb.asm.tree.analysis.Interpreter
All known Subclasses: org.objectweb.asm.tree.analysis.SourceInterpreter, org.objectweb.asm.tree.analysis.BasicInterpreter,
| Interpreter | | public interface Interpreter (Code) | | A semantic bytecode interpreter. More precisely, this interpreter only
manages the computation of values from other values: it does not manage the
transfer of values to or from the stack, and to or from the local variables.
This separation allows a generic bytecode
Analyzer to work with
various semantic interpreters, without needing to duplicate the code to
simulate the transfer of values.
author:
Eric Bruneton |
| Method Summary | |
| Value | binaryOperation(AbstractInsnNode insn, Value value1, Value value2)
Interprets a bytecode instruction with two arguments. | | Value | copyOperation(AbstractInsnNode insn, Value value)
Interprets a bytecode instruction that moves a value on the stack or to
or from local variables. | | Value | merge(Value v, Value w)
Merges two values. | | Value | naryOperation(AbstractInsnNode insn, List values)
Interprets a bytecode instruction with a variable number of arguments.
This method is called for the following opcodes:
INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC, INVOKEINTERFACE,
MULTIANEWARRAY
Parameters:
insn - the bytecode instruction to be interpreted.
Parameters:
values - the arguments of the instruction to be interpreted. | | Value | newOperation(AbstractInsnNode insn)
Interprets a bytecode instruction without arguments. | | Value | newValue(Type type)
Creates a new value that represents the given type.
Called for method parameters (including this),
exception handler variable and with null type
for variables reserved by long and double types.
Parameters:
type - a primitive or reference type, or null torepresent an uninitialized value. | | Value | ternaryOperation(AbstractInsnNode insn, Value value1, Value value2, Value value3)
Interprets a bytecode instruction with three arguments. | | Value | unaryOperation(AbstractInsnNode insn, Value value)
Interprets a bytecode instruction with a single argument. |
| binaryOperation | | Value binaryOperation(AbstractInsnNode insn, Value value1, Value value2) throws AnalyzerException(Code) | | Interprets a bytecode instruction with two arguments. This method is
called for the following opcodes:
IALOAD, LALOAD, FALOAD, DALOAD, AALOAD, BALOAD, CALOAD, SALOAD, IADD,
LADD, FADD, DADD, ISUB, LSUB, FSUB, DSUB, IMUL, LMUL, FMUL, DMUL, IDIV,
LDIV, FDIV, DDIV, IREM, LREM, FREM, DREM, ISHL, LSHL, ISHR, LSHR, IUSHR,
LUSHR, IAND, LAND, IOR, LOR, IXOR, LXOR, LCMP, FCMPL, FCMPG, DCMPL,
DCMPG, IF_ICMPEQ, IF_ICMPNE, IF_ICMPLT, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE,
IF_ACMPEQ, IF_ACMPNE, PUTFIELD
Parameters:
insn - the bytecode instruction to be interpreted.
Parameters:
value1 - the first argument of the instruction to be interpreted.
Parameters:
value2 - the second argument of the instruction to be interpreted. the result of the interpretation of the given instruction.
throws:
AnalyzerException - if an error occured during the interpretation. |
| copyOperation | | Value copyOperation(AbstractInsnNode insn, Value value) throws AnalyzerException(Code) | | Interprets a bytecode instruction that moves a value on the stack or to
or from local variables. This method is called for the following opcodes:
ILOAD, LLOAD, FLOAD, DLOAD, ALOAD, ISTORE, LSTORE, FSTORE, DSTORE,
ASTORE, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, SWAP
Parameters:
insn - the bytecode instruction to be interpreted.
Parameters:
value - the value that must be moved by the instruction. the result of the interpretation of the given instruction. Thereturned value must be equal to the given value.
throws:
AnalyzerException - if an error occured during the interpretation. |
| merge | | Value merge(Value v, Value w)(Code) | | Merges two values. The merge operation must return a value that
represents both values (for instance, if the two values are two types,
the merged value must be a common super type of the two types. If the two
values are integer intervals, the merged value must be an interval that
contains the previous ones. Likewise for other types of values).
Parameters:
v - a value.
Parameters:
w - another value. the merged value. If the merged value is equal to v,this method must return v. |
| naryOperation | | Value naryOperation(AbstractInsnNode insn, List values) throws AnalyzerException(Code) | | Interprets a bytecode instruction with a variable number of arguments.
This method is called for the following opcodes:
INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC, INVOKEINTERFACE,
MULTIANEWARRAY
Parameters:
insn - the bytecode instruction to be interpreted.
Parameters:
values - the arguments of the instruction to be interpreted. the result of the interpretation of the given instruction.
throws:
AnalyzerException - if an error occured during the interpretation. |
| newOperation | | Value newOperation(AbstractInsnNode insn) throws AnalyzerException(Code) | | Interprets a bytecode instruction without arguments. This method is
called for the following opcodes:
ACONST_NULL, ICONST_M1, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4,
ICONST_5, LCONST_0, LCONST_1, FCONST_0, FCONST_1, FCONST_2, DCONST_0,
DCONST_1, BIPUSH, SIPUSH, LDC, JSR, GETSTATIC, NEW
Parameters:
insn - the bytecode instruction to be interpreted. the result of the interpretation of the given instruction.
throws:
AnalyzerException - if an error occured during the interpretation. |
| newValue | | Value newValue(Type type)(Code) | | Creates a new value that represents the given type.
Called for method parameters (including this),
exception handler variable and with null type
for variables reserved by long and double types.
Parameters:
type - a primitive or reference type, or null torepresent an uninitialized value. a value that represents the given type. The size of the returnedvalue must be equal to the size of the given type. |
| ternaryOperation | | Value ternaryOperation(AbstractInsnNode insn, Value value1, Value value2, Value value3) throws AnalyzerException(Code) | | Interprets a bytecode instruction with three arguments. This method is
called for the following opcodes:
IASTORE, LASTORE, FASTORE, DASTORE, AASTORE, BASTORE, CASTORE, SASTORE
Parameters:
insn - the bytecode instruction to be interpreted.
Parameters:
value1 - the first argument of the instruction to be interpreted.
Parameters:
value2 - the second argument of the instruction to be interpreted.
Parameters:
value3 - the third argument of the instruction to be interpreted. the result of the interpretation of the given instruction.
throws:
AnalyzerException - if an error occured during the interpretation. |
| unaryOperation | | Value unaryOperation(AbstractInsnNode insn, Value value) throws AnalyzerException(Code) | | Interprets a bytecode instruction with a single argument. This method is
called for the following opcodes:
INEG, LNEG, FNEG, DNEG, IINC, I2L, I2F, I2D, L2I, L2F, L2D, F2I, F2L,
F2D, D2I, D2L, D2F, I2B, I2C, I2S, IFEQ, IFNE, IFLT, IFGE, IFGT, IFLE,
TABLESWITCH, LOOKUPSWITCH, IRETURN, LRETURN, FRETURN, DRETURN, ARETURN,
PUTSTATIC, GETFIELD, NEWARRAY, ANEWARRAY, ARRAYLENGTH, ATHROW, CHECKCAST,
INSTANCEOF, MONITORENTER, MONITOREXIT, IFNULL, IFNONNULL
Parameters:
insn - the bytecode instruction to be interpreted.
Parameters:
value - the argument of the instruction to be interpreted. the result of the interpretation of the given instruction.
throws:
AnalyzerException - if an error occured during the interpretation. |
|
|