This document provides steps for debugging Redis modules written in C. It instructs the user to download and build Redis from source, import the project into Eclipse, add their module code to the Redis project directory, configure debugging to load the module, and set breakpoints in the module's C code. When the Redis server is run under the debugger, it can then stop at breakpoints to inspect the module's execution.

1. Redis Module
Debugging
Diego Pacheco

2. @diego_pacheco
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3. Redis Module
❏ Runs inside Redis
❏ Low Latency
❏ Access to Redis Commands
❏ Fast -> C language
❏ Use Cases:
❏ Extend Redis
❏ New Capabilities

4. How to Debug?

5. Steps
❏ Download Redis 4.X
❏ make && make test
❏ Import on eclipse via Makefile
❏ Add the module inside Redis project
❏ Execute “server” program
❏ Configure debug with --loadmodule
❏ Goto .so file add a breakpoint in C code.
❏ Have Fun :D

6. Get Redis 4.x
wget http://download.redis.io/releases/redis-4.0.1.tar.gz
tar -xzvf redis-4.0.1.tar.gz
rm -rf redis-4.0.1.tar.gz
cd redis-4.0.1/
make
make test

7. Import on Eclipse cpp

8. Add Module code on Redis project
1. Create a folder inside redis project called “modules”
2. Add the modules code to that folder, like:
a. Module C code - i,e: date.c
b. Redis Modules API -> redismodule.h
c. Make Script -> Makefile
d. Build Script -> build.sh
3. When you run ./build.sh
a. We will compile date -> date.o
b. We will compile the module -> redis_date_module.so

9. Configure to Debug Redis

10. Configure to Debug Redis

11. Add a breakpoint on C code

12. Run The Debug

13. Call the Command on redis-cli
redis-cli dp.date

14. Debug on guys :D

15. Redis Module
Debugging
Diego Pacheco