Core · Module 5 · Lesson 10 of 12
Building, Debugging, and Testing C Projects
Turn several C source files into a repeatable build, investigate failures with a debugger, and verify ownership and error paths with focused tests.
By the end you can
- Separate declarations, implementations, tests, and build configuration
- Compile with useful warnings and debug symbols
- Use a debugger to inspect a failing call and its stack
- Combine unit tests, sanitizers, and failure-path tests
Builds on Memory-Mapped I/O with mmap and msync.
01 · A question first
A program that worked as one file now has a header, three source files, and a test. When a test crashes only after the fifth call, manually repeating compiler commands is not enough. How do you make the build repeatable and find the first invalid memory operation?
Make a guess before you read on.
02 · The idea
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What's inside
- Start with the problem
- Separate the project
- Compile deliberately
- Debug the first failure
- Make failures readable
- Test boundaries, not implementation details
- A practical debugging loop
- Test the contract
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