Debugging a Stack Overflow
Sep 07, · stack overflow at line 6 and Tags: stack. Facebook. shawn13 September 7, at Specs: Windows XP. line 6 and on facebook how can i fix this so my facebook runs correctly: See More: stack overflow at line 6 and › What does stack overflow at line 1 mean? Sep 27, · what does stock overflows at line mean and how do I get rid of it Click here for important information about medaoen.com Win ALL How-tos Win 10 Win 8 Win 7 Win XP Win Vista Win 95/98 Win NT Win Me Win 20Win 20Win E-Home Office PC Games Con Games Drivers Linux Websites E-Photo Hardware Security Coding.
All programs have something called a call stack. When a program calls a function, an item is placed pushed on the stack.
When the function returns, it's removed popped. Program call stack sizes are strictly limited. If you put too many calls on the stack, it will overflow. A common way this can occur is if a recursive function a function that calls itself where there is a bad case or exit condition. The function will keep calling itself over and over, filling up the stack and causing what does stack overflow at line 864 mean overflow.
Are you using Internet Explorer? It's likely because that is where this most commonly occurs. As such, here are some troubleshooting steps to help to resolve this issue:. Click the Advanced tab, and then click Reset. Another potential cause, spyware. This is very common in an internet browser and this is a common way that an error would occur.
For instance, the error could be occuring because a spyware program has installed had a programming error which triggered the stack error loop described above. If the issue persists what does stack overflow at line 864 mean you boot the computer, check if the same happened in no add-ons mode. Start Internet Explorer in No Add-ons mode to test, here's how :. Before you disable a browser add-on, keep in mind that some WebPages, or Internet Explorer how to dig a well for sprinkler system, might not display properly if an add-on is disabled.
We recommend that you only disable an add-on if it repeatedly causes Internet Explorer to close. Click the Tools button, and then click Manage Add-ons. Under Show, click All add-ons. When you are finished, click Close. Open Internet Explorer. In the Show list, click Add-ons that have been used by Internet Explorer to display all add-ons.
Click the add-on you want to enable, and then click Enable. Repeat step 4 for every add-on you want to enable. When you are finished, click OK.
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I have the same question Fixer Upper. Hi Goldie, Here is a good blurb on the subject. Good hypothetical question you may or may not have asked, I'll tell you : All programs have something called a call stack. Ok, how do I fix it? As such, here are some troubleshooting steps to help to resolve this issue: 1. Reset Internet Explorer Settings 1. Close any Internet Explorer or Windows Explorer windows that are currently open.
Close Internet Explorer. This will restore the default settings for features including: Home page, search scopes, Browsing History, Form Data, Passwords, Appearance settings, Toolbars and Active X controls Your changes will take effect the next time you open Internet Explorer. Run full malware scan especially for spyware : Another potential cause, spyware. Permanently disable add-ons for IE7 and 8 : hat tip to Diana for laying this out so well--see above post and voted helpful How satisfied are you with this reply?
Thanks for your feedback, it helps us improve the site. Robert Aldwinckle on forums MVP. Try disabling scripting and see how your symptoms change. Stack overflow can be a symptom of a script error where a loop is out of control or recursion is being used incorrectly. Microsoft Edge. This site in other languages x.
May 20, · If you put too many calls on the stack, it will overflow. A common way this can occur is if a recursive function (a function that calls itself) where there is a bad case or exit condition. The function will keep calling itself over and over, filling up the stack and causing the overflow. Ok, how do I fix it? A stack overflow is an error that user-mode threads can encounter. There are three possible causes for this error: A thread uses the entire stack reserved for it. This is often caused by infinite recursion. A thread cannot extend the stack because the page file is maxed out, and therefore no additional pages can be committed to extend the stack. A stack overflow is an undesirable condition in which a particular computer program tries to use more memory space than the call stack has available. In programming, the call stack is a buffer that stores requests that need to be handled. The size of a call stack depends on various factors. It is usually defined at the start of a program.
A stack overflow is an error that user-mode threads can encounter. There are three possible causes for this error:. A thread cannot extend the stack because the page file is maxed out, and therefore no additional pages can be committed to extend the stack. A thread cannot extend the stack because the system is within the brief period used to extend the page file. When a function running on a thread allocates local variables, the variables are put on the thread's call stack.
The amount of stack space required by the function could be as large as the sum of the sizes of all the local variables. However, the compiler usually performs optimizations that reduce the stack space required by a function. For example, if two variables are in different scopes, the compiler can use the same stack memory for both of those variables. The compiler might also be able to eliminate some local variables entirely by optimizing calculations. The amount of optimization is influenced by compiler settings applied at build time.
This topic assumes general knowledge of concepts, such as threads, thread blocks, stack and heap. Here is an example of how to debug a stack overflow.
In this example, NTSD is running on the same computer as the target application and is redirecting its output to KD on the host computer. You can look up exception code 0xCFD in ntstatus. All of the status codes are listed in 2. You can also use the! To double-check that the stack overflowed, you can use the k Display Stack Backtrace command:.
Now you should investigate the stack usage of the target process. Now you need to investigate thread 2. The period at the left of this line indicates that this is the current thread. The easiest way to list it is using! However, this requires you to have the proper symbols. For maximum versatility, assume you have no symbols and use the dd Display Memory command to display the raw values at that location:.
To interpret this, you need to look up the definition of the TEB data structure. If you had complete symbols, you could use dt TEB to do this. But in this case, you will need to look at the ntpsapi. This file contains the following information:.
In this case, these addresses are 0x00A and 0xFC The stack grows downward in memory. You can calculate the stack size using the? Evaluate Expression command:. This shows that the stack size is 16 K. The maximum stack size is stored in the field DeallocationStack. After some calculation, you can determine that this field's offset is 0xE0C. This shows that the maximum stack size is K, which means more than adequate stack space is left. Furthermore, this process looks clean -- it is not in an infinite recursion or exceeding its stack space by using excessively large stack-based data structures.
Now break into KD and look at the overall system memory usage with the! First, look at nonpaged and paged pool usage. Both are well within limits, so these are not the cause of the problem. Next, look at the number of committed pages: out of This is very close to the limit.
Although this display does not show this number to be completely at the limit, you should keep in mind that while you are performing user-mode debugging, other processes are running on the system. Each time an NTSD command is executed, these other processes are also allocating and freeing memory. That means you do not know exactly what the memory state was like at the time the stack overflow occurred.
Given how close the committed page number is to the limit, it is reasonable to conclude that the page file was used up at some point and this caused the stack overflow. This is not an uncommon occurrence, and the target application cannot really be faulted for this. If it happens frequently, you may want to consider raising the initial stack commitment for the failing application.
It can also be useful to find out exactly how much stack space a certain function call is allocating. To do this, disassemble the first few instructions and look for the instruction sub esp number. This moves the stack pointer, effectively reserving number bytes for local data. Then use the u, ub, uu Unassemble command to look at the assembler code at that address. The r Registers command provides information on the current contents of the registers, such as esp.
Symbols provide labels to items stored in memory, and when available, can make examining code easier. For an overview of symbols, see Using Symbols. For information on setting the symbols path, see.
To create a stack overflow, we can use this code, which continues to call a subroutine until the stack is exhausted. When the code is compiled and ran under WinDbg, it will loop for some number of times and then throw a stack overflow exception. Use the! For more information about thread memory, see Thread Stack Size. We can also use the! Skip to main content. Contents Exit focus mode. There are three possible causes for this error: A thread uses the entire stack reserved for it.
This is often caused by infinite recursion. Debugging a stack overflow without symbols Here is an example of how to debug a stack overflow. Analyzing a Single Function Call It can also be useful to find out exactly how much stack space a certain function call is allocating. Here is an example. First use the k command to look at the stack. Debugging stack overflow when symbols are available Symbols provide labels to items stored in memory, and when available, can make examining code easier.
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