CODEWITHSUNDEEP
javajava-bytecode-asm
LohithRaj
LohithRaj

Reputation: 21

How do I add this code to a method using ASM?

How can I insert this code into a method in a Java class file using the ASM library?

long MEGABYTE = 1024L * 1024L;            
Runtime runtime = Runtime.getRuntime();

runtime.gc();

long memory = runtime.totalMemory() - runtime.freeMemory();            
double memoryUsage=(double)memory/MEGABYTE;

Upvotes: 2

Views: 1872

Answers (1)

Rafael Winterhalter
Rafael Winterhalter

Reputation: 43972

The ASM package knows a utility called the ASMifier. This utility can be used to translate a compiled class into instructions for ASM to create this code. You could implement the code, use the ASMifier to read it and copy the created instructions into a new ASM ClassWriter that appends the required method to a byte stream it receives from an ASM ClassReader.

If this does not make sense to you: Read the ASM documentation. It is a great document and you will be able to understand how to do this with the above guidance after you read it.

Upvotes: 6

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