Heap Error Detected

JiangMarch 15, 20103 0 0 0 Heap is one of the most important memory structures used by almost every programs. Windows Heap Manager is at core of heap management. In this blog, I would like to focus on the heap monitoring feature provided by Windows Heap Manager critical error detected c0000374 c++ and some other useful tools in the context of detecting heap overrun. All the examples debugging heap corruption visual studio are based on 64-bit Windows 7 Operating System. The memory structures and layouts in 32-bit OS are similar to 64-bit ones, usually

Heap Corruption C++

it’s just the size difference (which is half of the 64-bit ones). Note: A major revamp has done to Windows Heap Manager in Windows Vista and continued in Windows 7. The purpose of those changes is to

Critical Error Detected C0000374 Visual Studio

improve Heap Manager’s performance, security and error resilience and monitoring. There are many great books and articles online about the details of latest Windows Heap Manager, such like [AWD07] and [WININT09]. Standard Heap Monitoring by Windows Heap Manager Windows Heap Manager provides some basic heap monitoring functionalities for every programs using heap. It performs limited heap validation in many heap operations. The normal heap block layout managed by Windows Heap Manager looks like this: Heap windbg heap corruption Block |Next Heap Block … Heap Header User Allocation Heap Header User Allocation 16 bytes Multiple of 16 bytes 16 bytes Multiple of 16 bytes As you can imagine, if the memory-write overruns the user allocated portion, then the next heap block’s header will be overwritten. Windows Heap Manager validates the heap header every time when a heap block is used or freed. If it finds the header has been damaged, then it announces a heap overrun has happened. Because of this detection mechanism used by Windows Heap Manager, it is not able to catch the overrun at the time it happens, but only detect it afterwards when the corrupted block is involved in some other operations. Another important aspect here is that the size of user allocation space is always a multiple of 16 bytes. This means, even if the size of memory requested by user is just 1 byte, the Windows Heap manager will still allocate 16 bytes for that request, in which 15 bytes are marked as unused. In this case, if the overrun happens within the unused user allocation, then obviously the next heap block’s header will not be damaged. Thus, the Windows Heap Manager is not able to detect this kind of overrun. Example 1: The following code request a 1 byte memory using malloc functi

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C# Heap Corruption

about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges gflags heap corruption Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each rtlplogheapfailure other. Join them; it only takes a minute: Sign up How to debug heap corruption errors? up vote 127 down vote favorite 83 I am debugging a (native) multi-threaded C++ application under VisualStudio2008. On seemingly random occasions, I get https://blogs.msdn.microsoft.com/jiangyue/2010/03/15/windows-heap-overrun-monitoring/ a "Windows has triggered a break point..." error with a note that this might be due to a corruption in the heap. These errors won't always crash the application right away, although it is likely to crash short after. The big problem with these errors is that they pop up only after the corruption has actually taken place, which makes them very hard to track and debug, especially on a multi-threaded application. What sort of things can http://stackoverflow.com/questions/1010106/how-to-debug-heap-corruption-errors cause these errors? How do I debug them? Tips, tools, methods, enlightments... are welcome. c++ windows debugging heap share|improve this question edited Jan 24 '13 at 20:21 Peter Mortensen 10.2k1369107 asked Jun 18 '09 at 0:01 Beef add a comment| 13 Answers 13 active oldest votes up vote 99 down vote accepted Application Verifier combined with Debugging Tools for Windows is an amazing setup. You can get both as a part of the Windows Driver Kit or the lighter Windows SDK. (Found out about Application Verifier when researching an earlier question about a heap corruption issue.) I've used BoundsChecker and Insure++ (mentioned in other answers) in the past too, although I was surprised how much functionality was in Application Verifier. Electric Fence (aka "efence"), dmalloc, valgrind, and so forth are all worth mentioning, but most of these are much easier to get running under *nix than Windows. Valgrind is ridiculously flexible: I've debugged large server software with many heap issues using it. When all else fails, you can provide your own global operator new/delete and malloc/calloc/realloc overloads -- how to do so will vary a bit depending on compiler and platform -- and this will be a bit of an investment -- but it may pay off over the long run. The desirable feature list should look familiar from dmalloc and electricfence, and the surprisingly excellent book Writing Solid Code: sen

here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss http://stackoverflow.com/questions/23471161/critical-error-detected-c0000374-c-dll-returns-pointer-off-allocated-memory the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping heap corruption each other. Join them; it only takes a minute: Sign up Critical error detected c0000374 - C++ dll returns pointer off allocated memory to C# up vote 5 down vote favorite I have a c++ dll which serving some functionality to my main c# application. Here i try to read a file, load it to memory and then critical error detected return some information such as the Pointer to loaded data and count of memory blocks to c#. The Dll reads file to memory successfully but on the return to the main application, program crashes due to Heap Corruption(Critical error detected c0000374). The code is quite simple and straightforward and I have done some similar things before with no problem, However i could not figure out what makes the problem here, I tried to allocate memory using "new, malloc and GlobalAlloc" but neither did help. Codes are as follow: C++ MyDll: typedef unsigned long U32; extern "C" __declspec(dllexport) int ReadFile(LPSTR Path, U32** DataPtr, U32* Count) { FILE *fp; U32 *Data; CString tempStr(Path); long fSize; if(!(fp = fopen(tempStr, "rb"))) { return 0; } // Obtain File Size; fseek(fp, 0, SEEK_END); fSize = ftell(fp); rewind(fp); Data = (U32 *)GlobalAlloc(0, fSize); if(Data == NULL) { fclose(fp); return -1; } // Copy file into the buffer. if(!(*Count = fread(Data, sizeof(U32), fSize / sizeof(U32), fp))) { fclose(fp); free(Data); return -2; } *DataPtr = (U32 *)Data; return 1;