JSTACK(1)

🌸 NAME 🌸

okay so bestie, this is jstack(1) — part of the JDK Commands crew 👑 — and it prints Java stack traces of Java threads for a specified Java process. That's the vibe. 💅

✨ SYNOPSIS ✨

🚨 Note: This command is experimental and unsupported.

jstack [options] pid

• options — this represents the jstack command-line options. See Options for the jstack Command below, bestie. 🫶
• pid — the process ID for which the stack trace is printed. The process must be a Java process. Need a list of Java processes running on a machine? Use either the ps command or, if the JVM processes are not running in a separate docker instance, the jps command. 💖

🦋 DESCRIPTION 🦋

jstack prints Java stack traces of Java threads for a specified Java process. For each Java frame, the full class name, method name, byte code index (BCI), and line number, when available, are printed. Iconic. ✨

C++ mangled names aren't demangled, ngl. To demangle C++ names, you can pipe the output of this command to c++filt. 💅

When the specified process is running on a 64-bit JVM, you might need to specify the -J-d64 option, for example:

jstack -J-d64 pid

⚠️ Note: This command is unsupported and might not be available in future releases of the JDK. In Windows Systems where the dbgeng.dll file isn't present, the Debugging Tools for Windows must be installed so that these tools work. The PATH environment variable needs to contain the location of the jvm.dll that is used by the target process, or the location from which the core dump file was produced. No cap, that part matters. 😭

🎀 OPTIONS FOR THE JSTACK COMMAND 🎀

• -l — the long listing option; it prints additional information about locks. Lock lore unlocked 🔐✨
• -h or -help — prints a help message. Slay, short and sweet. 💖

that's the whole jstack(1) moment, bestie — JDK 23, 2024, signing off with sparkles 🫶💋