Add README for threads-bugs and link in main README

README.md

@@ -36,7 +36,7 @@ Concurrency Chapters:
 * Locked Data Structures
 * [Condition Variables](threads-cv)
 * [Semaphores](threads-sema)
-* Concurrency Bugs
+* [Concurrency Bugs](threads-bugs)
 * Event-based Concurrency
 
 ## Persistence

threads-bugs/README.md

@@ -0,0 +1,12 @@
+
+# Common Concurrency Problems
+
+Code examples from the chapter about concurrency problems.
+Type `make` to build all examples.
+
+## Atomicity Failure
+
+- `atomicity.c`: Shows how uncareful check-then-use can crash code
+
+
+