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Melnytskyi Artem "A Little About the Bugs in the Code"

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The document discusses different types of bugs that can occur in code including memory access bugs, threading bugs, and undefined behavior bugs. Memory access bugs include buffer overflows, erroneous type casts, use-after-free errors, and memory leaks. Threading bugs involve issues with mutexes, deadlocks, data races, and race conditions during object construction and destruction. Undefined behavior bugs result from violations of initialization order, the one definition rule, lack of sequence points, and integer overflows.

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www.luxoft.com Artem Melnytskyi A Little About the Bugs in the Code
www.luxoft.com Coding Coffee Code review About me Code review Coding Coffee
www.luxoft.com It’s about • Bug classification • Memory access bugs • Threading bugs • Undefined behavior bug
www.luxoft.com Before the beginning… • Nothing here claims to be the truth in the last instance. • Yes, I know that on another compiler, and another platform (on which you were lucky enough to work) this may not be so.
www.luxoft.com Memory access bugs Buffer overflow Erroneous type cast Use-after- free Use-after- return Use-after- scope [De]allocation bugs Memory leaks Use of uninitialized memory Threadin g bugs Mutex Deadlock Data Races Race on a bitfield Race During Destructio n VPTR: constructio n order Race on VPTR Race on VPTR (cont) Atomicity violation Atomicity violation (cont) Other Undefined Behavior Init Order Fiasco ODR (one definition rule) Violation Lack of Sequence Point Integer Overflow Bug classification
www.luxoft.com
www.luxoft.com bug in GCC Memory access bugs
www.luxoft.com bug in GCC Memory access bugs
www.luxoft.com bug in GCC Memory access bugs
www.luxoft.com bug in GCC Memory access bugs
www.luxoft.com
www.luxoft.com Алло RAIIчка, ты сейчас упадешь! Memory access bugs
www.luxoft.com Memory access bugs
www.luxoft.com Memory access bugs
www.luxoft.com https://www.viva64.com/en/a/0079/ 100 Bugs in Open Source C/C++ projects
www.luxoft.com Memory access bugs
www.luxoft.com
www.luxoft.com Threading bugs
www.luxoft.com Threading bugs
www.luxoft.com Threading bugs
www.luxoft.com Continue...
www.luxoft.com
www.luxoft.com VPTR RACE
www.luxoft.com Other Undefined Behavior
www.luxoft.com THANK YOU!

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