Analyzer lj-c-memory-leak-fgraph

# Name

lj-c-memory-leak-fgraph - Lua-Land Memory Leak Flame Graphs

This analyzer detects memory leaks in C-land code within LuaJIT-based applications such as OpenResty, Kong. It monitors memory allocation and deallocation patterns over a sampling period followed by a silence period, identifying memory chunks that are allocated but never freed. The analyzer generates flame graphs showing the call stacks where leaked memory was allocated, helping pinpoint the source of memory leaks in native code called from Lua or in the Lua runtime itself.

# Resource Category

Memory.

# Application Type & Technical Stack

• OpenResty
• Kong
• APISIX

# Command Line Syntax

The analyzer can be invoked directly on the command-line via the orxray utility from the openresty-xray-cli software package.

Alternatively, the analyzer can also be invoked manually or automatically on the web console UI of OpenResty XRay (like on the Advanced web page).

# PID is the target process PID.
orxray analyzer run lj-c-memory-leak-fgraph -p PID

# trace a shell command directly
orxray analyzer run lj-c-memory-leak-fgraph -c SHELL_CMD

# PGID is the process group ID or any process's PID within the target process
# group.
orxray analyzer run lj-c-memory-leak-fgraph -p -PGID

# trace any processes started from the specified executable path.
orxray analyzer run lj-c-memory-leak-fgraph --exe /path/to/exe/file

# Tracing Multiple Processes

Supported.

# Output Formats

• Flame Graphs

# Author

The OpenResty Inc. Team.

# Copyright

Copyright (C) by OpenResty Inc. All rights reserved.