ztw33 / jmtrace

A tool for tracing shared memory access in a Java program packaged in a jar file.

jmtrace

A tool for tracing shared memory access in a Java program packaged in a jar file.

Requirements

• JDK 1.8 (>= 1.8.0_152)
• maven 3

Build

This project uses maven to package jar file. Run command below in this directory to generate agent jar file:

$ mvn clean package

The agent jar file is jmtrace-1.0-SNAPSHOT-jar-with-dependencies.jar under directory target.

Usage

$ java -javaagent:[path to jmtrace-1.0-SNAPSHOT-jar-with-dependencies.jar] -jar [path to target traced jar]

Every time accessing shared memory, jmtrace will output a log consisting of four parts:

R/W     ThreadID    Object_Identify_Code  Object/Class_Member(or index of array)

Example

$ java -javaagent:target/jmtrace-1.0-SNAPSHOT-jar-with-dependencies.jar -jar test.jar
W 1 0cc34f4d00000000 com.tiva.ISER.App.sc
R 1 300ffa5d00000000 com.tiva.ISER.App.az
W 2 1d56ce6a00000000 java.lang.String[0]
W 2 5197848c00000002 int[2]
R 3 5197848c00000003 int[3]