bytecode

问题 class CheckInventory(target: Target) : Command(target) { } When decompiling the above Kotlin code using the IntelliJ's " Show Kotlin bytecode " option, it keeps generating a statement above the super() call: class CheckInventory extends Command { public CheckInventory(Target target) { Intrinsic.checkParameterIsNotNull(target, "target"); super(target); //error, must be first call } } There are a few other issues, such as generating top-level classes with an access modifier for WhenMapping:

问题 I am new to java and currently doing a java project. This is the instruction on how to submit the project. Could anyone tell me how to do this in either intelliJ or eclipse? Please submit a Java Archive (jar file containing all java classes you have written). Your jar file should contain: a) Contain source code for all classes b) Contain executable (byte code) for all classes 回答1: This question has been already answered here multiple times. Since you also need to include the sources, you will

问题 I'm implementing a sandboxed JS environment that allows users to upload their JS code and trigger it based on a set of rules. I disabled Java access from Nashorn environment and only allow accessing some utility classes for a few operations such as HTTP requests, base64 encoding etc. Currently, I create ScriptEngine (Nashorn environment) for each JS code uploaded by users but in our environment we have many pre-defined JS code which are used by most of our users. Since creating ScriptEngine

问题 This question already has answers here : What is the point of invokeinterface? (2 answers) Closed 3 years ago . Is there any reason for making the instruction to invoke non-static non-constructor method into two distinct instruction instead of one unified instruction, like invokeinstance ? Does it has anything to do with some random internal JVM mechanism or it's yet another horrific legacy issue? I know we have invokespecial because invoking constructor needs name ckecking, marking one other

问题 In my mind, the Python interpreter is simulate what a CPU run binary code. And, processor will have a call stack when you invoke a function, Python as well. So, is there a corresponding between the Python stack frame and processor's call stack? Like when we invoke a function in Python interpreter, it made a new stack frame, and what happened to processor is it push esp , mov ebp, esp , and so on. 来源： https://stackoverflow.com/questions/55843979/whats-the-relationship-between-processors-call

问题 By stumbling on this so thread i decided to write similar test in PHP. My test code is this: // Slow version $t1 = microtime(true); for ($n = 0, $i = 0; $i < 20000000; $i++) { $n += 2 * ($i * $i); } $t2 = microtime(true); echo "n={$n}\n"; // Optimized version $t3 = microtime(true); for ($n = 0, $i = 0; $i < 20000000; $i++) { $n += $i * $i; } $n *= 2; $t4 = microtime(true); echo "n={$n}\n"; $speedup = round(100 * (($t2 - $t1) - ($t4 - $t3)) / ($t2 - $t1), 0); echo "speedup: {$speedup}%\n";

问题 Let's say I want to pretty print the bytecode of a method with the asm library. public int get777() { return 777; } through TraceClassVisitor will look as // access flags 0x1 public get777()I L0 LINENUMBER 21 L0 SIPUSH 777 IRETURN L1 LOCALVARIABLE this Lsomething/Point; L0 L1 0 MAXSTACK = 1 MAXLOCALS = 1 } Now, the thing is that I only care for SIPUSH 777 IRETURN being everything else largely irrelevant to me, so I want to wipe them out. I've thought of filtering the stuff I don't want by

问题 For an arbitrary code base in Java, I want to create a table (conceptually) of USES and USED-BY relations between symbols and types. A symbol table has the information I need. However, writing a front end seems like a huge task and threatens to turn my project into an even bigger sub-project. There's no reason for this, it seems to me ,because bytecode, the Java .class file necessarily contains within it such a symbol table for each class so that it can resolve types and references. My

问题 How can I construct a org.objectweb.asm.tree.analysis.Frame for each instruction in a method using only FrameNodes and LocalVariableNodes from the MethodNode ? Context While instrumenting some code I need all the locals and stack types for some of the original instructions. Currently I get this by doing: Analyzer analyzer = new Analyzer(new MyBasicInterpreter()); Frame[] frames = analyzer.analyze(ownerClass, methodNode); This gives me a Frame for each instruction in the methodNode . However,

问题 I have built a program, which takes in a provided ".class" file and parses it using the BCEL, I've learnt how to calculate the LCOM4 value now. Now I would like to know how to calculate the CBO(Coupling between object) value of the class file. I've scoured the whole web, trying to find a proper tutorial about it, but I've been unable so far (I've read the whole javadoc regarding the BCEL as well and there was a similar question on stackoverflow but it has been removed). So I would like some