How to set up environment to debug JDK source code (Especially G1 Garbage Collector)

Question

I want to understand the practical working of G1 garbage collector in JDK14 for that I want to set up a debugger in which I can understand the code step by step. I have configured the jdk14 code with following flags:

./configure --with-target-bits=64 --with-debug-level=slowdebug --disable-warnings-as-errors --with-native-debug-symbols=internal

and to compile:

make all

Further, I am trying to debug using gdb with the following command:

gdb --args /path/to/java helloWorld

gdb gives a segmentation fault.

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7ffff5cb1700 (LWP 272288)]

Thread 2 "java-slowdebug" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7ffff5cb1700 (LWP 272288)]
0x00007fffe100064d in ?? ()

Code for helloworld.java.

class helloworld{
    public static void main(String[] args) {
        System.out.println("hello world");
    }
}

But when running the program using /path/to/java helloworld, it works fine.

Please suggest the tools and procedure to set up the debugging environment for JDK14.

How to set up environment to debug JDK source code (Especially G1 Garbage Collector)

0 Answers0