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27 000 Errors in the Tizen Operating System


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PVS-Studio team regularly checks different open projects and publishes articles on the results of these checks. This time, Andrey Karpov (CTO) accomplished the checking of some projects that are part of the Tizen operating system and has detected about 900 errors. The article is devoted to the review of many of these errors and will be useful both for beginners and experienced developers.

The types of errors that will be discussed in the article:

  • CWE-14: Compiler Removal of Code to Clear Buffers
  • CWE-131: Incorrect Calculation of Buffer Size
  • CWE-134 Use of Externally-Controlled Format String
  • CWE-393 Return of Wrong Status Code
  • CWE-457: Use of Uninitialized Variable
  • CWE-476: NULL Pointer Dereference
  • CWE-562: Return of Stack Variable Address
  • CWE-563: Assignment to Variable without Use ('Unused Variable')
  • CWE-570: Expression is Always False
  • CWE-571: Expression is Always True
  • CWE-690: Unchecked Return Value to NULL Pointer Dereference
  • CWE-697: Insufficient Comparison
  • CWE-762: Mismatched Memory Management Routines
  • CWE-770: Allocation of Resources Without Limits or Throttling
  • CWE-787: Out-of-bounds Write
  • CWE-805: Buffer Access with Incorrect Length Value

It is impossible to describe all the 900 errors, that is why most of them will be provided in a list. However, if you wish, you can examine each of the found defects, using the information provided about the location of the error.

According to the results, there is a prediction in the article, that the PVS-Studio analyzer can identify about 27000 errors in this project. This article demonstrates that during the development of the large projects, static analysis is not just a useful, but an absolutely necessary part of the development process. Get some coffee and cookies, as there is a programmer thriller waiting for us.

Link to the article: https://www.viva64.com/en/b/0519/

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      The most essential part in product development was the picture quality technology. “We adopted the same processor used in the best-quality TVs for gamers who spare no expense to play a game smoothly with incredible picture quality,” Lee said. Combined with 4K resolution, the huge display features the best gaming specifications with a 165Hz refresh rate and 1ms response time (GtG). In fact, it is the first 55-inch gaming screen that supports a 165Hz refresh rate.
       

       

       
      Hyun Mook Choi, who designed Flex Move Screen, highlighted the purpose of product development saying, “Most gamers like multitasking, so they keep changing where to place the main monitor on their desk and adjust the screen size and ratio based on what to play.” Flex Move Screen allows users to choose a perfect screen size between 55- and 27-inches, as well as the screen ratio between 16:9, 21:9 and 32:9. In addition, it also helps users find the most comfortable posture by adjusting its screen position within a large, 55-inch screen.
       

       

       
      Ark Dial, the exclusive controller for the Odyssey Ark, was designed for gamers who continuously adjust settings to save time and find shortcuts. Users can easily change the screen layout and setting with Ark Dial as well as quickly and simply control Multi View. “The internal test shows that Ark Dial drastically reduces the setting time from about one minute to five seconds,” said Kim. “For the Ark Dial test, we even rented acquaintances’ luxury vehicles and tested how smoothly it rotates and response time of the jog dial.”
       
      In addition, the Odyssey Ark introduces overwhelmingly immersive sound with Dolby Atmos based on a 60W 2.2.2 channel and Sound Dome Tech. Choi got insight from reviews involving professional gamers, T1. “Contrary to our thoughts that all gamers would like to play a game wearing a headset, they prefer to use speakers. This clearly shows that a perfect sound direction and lifelike gaming sound effects are particularly important.” said Choi. “That is why the Odyssey Ark offers multi-channel speakers and additional woofer.”
       
       
      Continuous Studies and Testing To Create Totally New Product Concept

       

       
      Inventing a new product means continuous testing, experiments and studies. Moreover, strengthening the large screen’s usability on the desk was a daunting task. They adopted 1000R curvature to optimize the near-field viewing angle of the 55-inch display. A thin plate for the bottom part helps gamers efficiently use space even with the large screen.
       
      Kim explored more than 500 videos on gaming room decorating and game-related documentaries to learn how gamers decorate and organize their space. “To develop an unprecedented 55-inch 1000R curved gaming screen, I watched videos that carry gamers’ daily life and analyzed their lifestyle,” he said.
       
      Then, they created product mockups by using a form board and viewed the screens with projectors to find the perfect screen size and curvature as well as to realize the ambition of vertical Cockpit Mode.
       
      Lee conducted a two-week review involving heavy gamers in the U.S. and studied every detail of gamers’ needs regarding features and interfaces. “During the four-day business trip I had to deal with real-time issues and responses day and night. But it was such a meaningful time that I even forgot how tired I was!” Lee said.
       
      Any new feature requires significant time and effort as many people from different departments work together to verify UX, GUI, compatibility with conventional features and quality control. “I think it is the first project in which so many people from different departments joined together for a single product,” said Choi. “It is incredible that every single person actively participated in the project.”
       
       
      Odyssey Ark Is Finally Here. So, What’s Next?

       
      The Odyssey Ark surprised the world with its best-in-class gaming screen. But when asked about the next plan, every expert uniformly said, “This is only the beginning.” Lee said, “The ark is in the early stages. We will continue to update the product by reflecting gamers’ preferences.” Kim added, “I would like to overcome physical limits and create a better screen.” Choi shared his ambition saying, “We will do everything possible to allow users to seamlessly immerse themselves in any game with the Ark.” Going forward, the Odyssey Ark will continue to open new possibilities for gamers.
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