Package org.objectweb.asm.tree.analysis
Class BasicVerifier
- java.lang.Object
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- org.objectweb.asm.tree.analysis.Interpreter<BasicValue>
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- org.objectweb.asm.tree.analysis.BasicInterpreter
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- org.objectweb.asm.tree.analysis.BasicVerifier
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- All Implemented Interfaces:
Opcodes
- Direct Known Subclasses:
SimpleVerifier
public class BasicVerifier extends BasicInterpreter
An extendedBasicInterpreter
that checks that bytecode instructions are correctly used.- Author:
- Eric Bruneton, Bing Ran
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Field Summary
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Fields inherited from class org.objectweb.asm.tree.analysis.Interpreter
api
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Fields inherited from interface org.objectweb.asm.Opcodes
AALOAD, AASTORE, ACC_ABSTRACT, ACC_ANNOTATION, ACC_BRIDGE, ACC_DEPRECATED, ACC_ENUM, ACC_FINAL, ACC_INTERFACE, ACC_MANDATED, 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, ASM4, ASM5, 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, H_GETFIELD, H_GETSTATIC, H_INVOKEINTERFACE, H_INVOKESPECIAL, H_INVOKESTATIC, H_INVOKEVIRTUAL, H_NEWINVOKESPECIAL, H_PUTFIELD, H_PUTSTATIC, 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, 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, V1_8
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Constructor Summary
Constructors Modifier Constructor Description BasicVerifier()
protected
BasicVerifier(int api)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description BasicValue
binaryOperation(AbstractInsnNode insn, BasicValue value1, BasicValue value2)
Interprets a bytecode instruction with two arguments.BasicValue
copyOperation(AbstractInsnNode insn, BasicValue value)
Interprets a bytecode instruction that moves a value on the stack or to or from local variables.protected BasicValue
getElementValue(BasicValue objectArrayValue)
protected boolean
isArrayValue(BasicValue value)
protected boolean
isSubTypeOf(BasicValue value, BasicValue expected)
BasicValue
naryOperation(AbstractInsnNode insn, java.util.List<? extends BasicValue> values)
Interprets a bytecode instruction with a variable number of arguments.void
returnOperation(AbstractInsnNode insn, BasicValue value, BasicValue expected)
Interprets a bytecode return instruction.BasicValue
ternaryOperation(AbstractInsnNode insn, BasicValue value1, BasicValue value2, BasicValue value3)
Interprets a bytecode instruction with three arguments.BasicValue
unaryOperation(AbstractInsnNode insn, BasicValue value)
Interprets a bytecode instruction with a single argument.-
Methods inherited from class org.objectweb.asm.tree.analysis.BasicInterpreter
merge, newOperation, newValue
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Method Detail
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copyOperation
public BasicValue copyOperation(AbstractInsnNode insn, BasicValue value) throws AnalyzerException
Description copied from class:Interpreter
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- Overrides:
copyOperation
in classBasicInterpreter
- Parameters:
insn
- the bytecode instruction to be interpreted.value
- the value that must be moved by the instruction.- Returns:
- the result of the interpretation of the given instruction. The returned value must be equal to the given value.
- Throws:
AnalyzerException
- if an error occured during the interpretation.
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unaryOperation
public BasicValue unaryOperation(AbstractInsnNode insn, BasicValue value) throws AnalyzerException
Description copied from class:Interpreter
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- Overrides:
unaryOperation
in classBasicInterpreter
- Parameters:
insn
- the bytecode instruction to be interpreted.value
- the argument of the instruction to be interpreted.- Returns:
- the result of the interpretation of the given instruction.
- Throws:
AnalyzerException
- if an error occured during the interpretation.
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binaryOperation
public BasicValue binaryOperation(AbstractInsnNode insn, BasicValue value1, BasicValue value2) throws AnalyzerException
Description copied from class:Interpreter
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- Overrides:
binaryOperation
in classBasicInterpreter
- Parameters:
insn
- the bytecode instruction to be interpreted.value1
- the first argument of the instruction to be interpreted.value2
- the second argument of the instruction to be interpreted.- Returns:
- the result of the interpretation of the given instruction.
- Throws:
AnalyzerException
- if an error occured during the interpretation.
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ternaryOperation
public BasicValue ternaryOperation(AbstractInsnNode insn, BasicValue value1, BasicValue value2, BasicValue value3) throws AnalyzerException
Description copied from class:Interpreter
Interprets a bytecode instruction with three arguments. This method is called for the following opcodes: IASTORE, LASTORE, FASTORE, DASTORE, AASTORE, BASTORE, CASTORE, SASTORE- Overrides:
ternaryOperation
in classBasicInterpreter
- Parameters:
insn
- the bytecode instruction to be interpreted.value1
- the first argument of the instruction to be interpreted.value2
- the second argument of the instruction to be interpreted.value3
- the third argument of the instruction to be interpreted.- Returns:
- the result of the interpretation of the given instruction.
- Throws:
AnalyzerException
- if an error occured during the interpretation.
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naryOperation
public BasicValue naryOperation(AbstractInsnNode insn, java.util.List<? extends BasicValue> values) throws AnalyzerException
Description copied from class:Interpreter
Interprets a bytecode instruction with a variable number of arguments. This method is called for the following opcodes: INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC, INVOKEINTERFACE, MULTIANEWARRAY and INVOKEDYNAMIC- Overrides:
naryOperation
in classBasicInterpreter
- Parameters:
insn
- the bytecode instruction to be interpreted.values
- the arguments of the instruction to be interpreted.- Returns:
- the result of the interpretation of the given instruction.
- Throws:
AnalyzerException
- if an error occured during the interpretation.
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returnOperation
public void returnOperation(AbstractInsnNode insn, BasicValue value, BasicValue expected) throws AnalyzerException
Description copied from class:Interpreter
Interprets a bytecode return instruction. This method is called for the following opcodes: IRETURN, LRETURN, FRETURN, DRETURN, ARETURN- Overrides:
returnOperation
in classBasicInterpreter
- Parameters:
insn
- the bytecode instruction to be interpreted.value
- the argument of the instruction to be interpreted.expected
- the expected return type of the analyzed method.- Throws:
AnalyzerException
- if an error occured during the interpretation.
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isArrayValue
protected boolean isArrayValue(BasicValue value)
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getElementValue
protected BasicValue getElementValue(BasicValue objectArrayValue) throws AnalyzerException
- Throws:
AnalyzerException
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isSubTypeOf
protected boolean isSubTypeOf(BasicValue value, BasicValue expected)
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