#bugs_in_c

Barotrauma
▻https://hownot2code.com/2022/03/31/barotrauma

BUG OF THE MONTH | Unnecessary actions V3107 Identical expression ‘power’ to the left and to the right of compound assignment. RelayComponent.cs 150 The programmer is trying to add MaxPower, power and the difference between currPowerConsumption and power. The expanded version of the expression will look as follows: There’s no need to subtract the power variable from itself. The simplified code will look like … Continue reading Barotrauma

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Unity
▻https://hownot2code.com/2022/04/26/unity-2

BUG OF THE MONTH | Assignment to Variable without Use V3008 The ‘rect.y’ variable is assigned values twice successively. Perhaps this is a mistake. Check lines: 370, 366. ShaderVariantCollectionInspector.cs 370 The analyzer reports that the same variable — rect.y — is assigned a value twice and the code does not use the variable between the assignments. If we … Continue reading Unity

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Bitwarden
▻https://hownot2code.com/2022/05/25/bitwarden

BUG OF THE MONTH | Erroneous postfix PVS-Studio warning: V3159 Modified value of the ‘retriedCount’ operand is not used after the postfix increment operation. FreshdeskController.cs 167 Look at the incrementation of the retriedCount variable. Weird — the postfix notation is used here. The current value of the variable is returned first, and only then this value is increased. Maybe … Continue reading Bitwarden

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Ogre3D
▻https://hownot2code.com/2022/03/29/ogre3d

BUG OF THE MONTH | Incorrect Calculation V1064 The ‘1’ operand of integer division is less than the ‘100000’ one. The result will always be zero. OgreAutoParamDataSource.cpp 1094 Here the dummy vector should store floating point numbers. In this case, the constructor receives 4 arguments of the float type. However, there are integer values to the left and right of … Continue reading Ogre3D

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Blend2D
▻https://hownot2code.com/2022/04/29/blend2d

BUG OF THE MONTH | An always-false expression V547 Expression ‘h == 0’ is always false. jpegcodec.cpp 252 In this code fragment, the result of the blMemReadU16uBE function call is assigned to the h variable. Then if the h == 0 check is true, we exit from the function’s body. During initialization impl->delayedHeight, the h variable has non-zero value. Thus, impl->delayedHeight is false.

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DuckStation
▻https://hownot2code.com/2022/05/27/duckstation

BUG OF THE MONTH | Free of Pointer not at Start of Buffer V726 An attempt to free memory containing the ‘wbuf’ array by using the ‘free’ function. This is incorrect as ‘wbuf’ was created on stack. log.cpp 216 Here the analyzer detected code with an error. In this code fragment, we see an attempt to … Continue reading DuckStation

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How to Use Mass Suppression in PVS-Studio for C#?
▻https://hownot2code.com/2021/11/03/how-to-use-mass-suppression-in-pvs-studio-for-c-2

Have you just run the analyzer and now you have no idea what to do with all this abundance of warnings? 📜 Nothing to worry about – we made a special mechanism that can help you deal with them 💪🏻 In this #Video, you’ll learn about the inner workings of mass warnings suppression mechanism in … Continue reading How to Use Mass Suppression in PVS-Studio for C#?

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Unity projects analysis: the solution file has two projects named “UnityEngine.UI”
▻https://hownot2code.com/2021/10/18/unity-projects-analysis-the-solution-file-has-two-projects-named-unitye

While PVS-Studio analyses a Unity project, one may stumble upon such an error: Error was encountered while trying to open solution file ‘…’: The solution file has two projects named “UnityEngine.UI”. This note discusses the reasons for this error and how to eliminate it. Reasons PVS-Studio uses some third-party libraries, including Roslyn and MSBuild to … Continue reading Unity projects analysis: the solution file has two projects named “UnityEngine.UI”

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CWE #top 25 2021. What is it, what is it for and how is it useful for static analysis?
▻https://hownot2code.com/2021/09/30/cwe-top-25-2021-what-is-it-what-is-it-for-and-how-is-it-useful-for-stat

For the first time PVS-Studio provided support for the CWE classification in the 6.21 release. It took place on January 15, 2018. Years have passed since then and we would like to tell you about the improvements related to the support of this classification in the latest analyzer version. We position the PVS-Studio analyzer as … Continue reading CWE Top 25 2021. What is it, what is it for and how is it useful for static analysis?

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#peachpie
▻https://hownot2code.com/2021/09/01/peachpie

data == null && throw NullReferenceException The V3080 warning: Possible null dereference. Consider inspecting ‘data’. PhpStream.cs 1382 The value of the data variable is checked in the loop. If the variable equals null and its Length property has a positive value, then the loop exit occurs. Clearly, it’s impossible. Moreover, we have an exception when accessing the Length variable that has the null value. Here, the access … Continue reading PeachPie

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#BitTorrent
https://hownot2code.com/2021/08/02/bittorrent

Using memset to clear memory Warning V597 The compiler could delete the ‘memset’ function call, which is used to flush ‘ui’ object. The memset_s() function should be used to erase the private data. makemeta-ui.c:53 The most frequent mistake is to use the memset function to clear memory. In short, the compiler has every right to delete memset calls if … Continue reading BitTorrent

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Zero, one, two, Freddy’s coming for you
▻https://hownot2code.com/2020/04/03/zero-one-two-freddys-coming-for-you

This post continues the series of articles, which can well be called “horrors for developers”. This time it will also touch upon a typical pattern of typos related to the usage of numbers 0, 1, 2. The language you’re writing in doesn’t really matter: it can be C, C++, C#, or #java. If you’re using … Continue reading Zero, one, two, Freddy’s coming for you

#Tips_and_tricks #ADAPTIVE_Communication_Environment_ACE_ #Asterisk #audacity #Bugs_in_C#_projects #C# #C++ #C++bugs #CMake #Coin3D #Godot_Engine #ITK #Java_bugs #libreoffice #Open_CASCADE_Technology #OpenCOLLADA #OpenCV #PDFium #programming #Quake-III-Arena #ReactOS #Trans-Proteomic_Pipeline #Visualization_Toolkit_VTK_ #xnu_kernel
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How to shoot yourself in the foot in C and C++. #haiku OS Cookbook
▻https://hownot2code.com/2019/07/26/how-to-shoot-yourself-in-the-foot-in-c-and-c-haiku-os-cookbook

This story goes back to 2015, when Haiku OS and PVS-Studio static analyzer developers decided to join forces and improve this OS code quality. At first it was more like an experiment, as there was no Linux analyzer at that time and the team had to work only with the compiled executable analyzer file. The … Continue reading How to shoot yourself in the foot in C and C++. Haiku OS Cookbook

#Bugs_in_C/C++_projects #cpp #opensource
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