Package org.objectweb.asm.tree.analysis
Provides a framework for static code analysis based on the asm.tree package.
Basic usage:
ClassReader classReader = new ClassReader(bytecode); ClassNode classNode = new ClassNode(); classReader.accept(classNode, ClassReader.SKIP_DEBUG); for (MethodNode method : classNode.methods) { if (method.instructions.size() > 0) { Analyzer analyzer = new Analyzer(new BasicInterpreter()); analyzer.analyze(classNode.name, method); Frame[] frames = analyzer.getFrames(); // Elements of the frames array now contains info for each instruction // from the analyzed method. BasicInterpreter creates BasicValue, that // is using simplified type system that distinguishes the UNINITIALZED, // INT, FLOAT, LONG, DOUBLE, REFERENCE and RETURNADDRESS types. ... } }
- Since:
- ASM 1.4.3
-
Interface Summary Interface Description Value An immutable symbolic value for the semantic interpretation of bytecode. -
Class Summary Class Description Analyzer<V extends Value> A semantic bytecode analyzer.BasicInterpreter AnInterpreter
forBasicValue
values.BasicValue AValue
that is represented with its type in a seven types type system.BasicVerifier An extendedBasicInterpreter
that checks that bytecode instructions are correctly used.Frame<V extends Value> A symbolic execution stack frame.Interpreter<V extends Value> A semantic bytecode interpreter.SimpleVerifier An extendedBasicVerifier
that performs more precise verifications.SourceInterpreter AnInterpreter
forSourceValue
values.SourceValue AValue
which keeps track of the bytecode instructions that can produce it. -
Exception Summary Exception Description AnalyzerException An exception thrown if a problem occurs during the analysis of a method.