Program crash, debug display stack overflow
c0000409 (Security check failure or stack buffer overrun)
A stack based buffer overflow was detected in this application. This overrun may allow malicious users to take control of this application.
EXCEPTION_RECORD: (.exr -1)ExceptionAddress: 08f276bd (nvoglv32!vk_optimusGetInstanceProcAddr+0x000c549d) ExceptionCode: c0000409 (Security check failure or stack buffer overrun) ExceptionFlags: 00000001NumberParameters: 1 Parameter[0]: 00000007EXCEPTION_RECORD: (.exr -1)ExceptionAddress: 08f276bd (nvoglv32!vk_optimusGetInstanceProcAddr+0x000c549d) ExceptionCode: c0000409 (Security check failure or stack buffer overrun) ExceptionFlags: 00000001NumberParameters: 1 Parameter[0]: 00000007Subcode: 0x7 FAST_FAIL_FATAL_APP_EXIT PROCESS_NAME: lec_teacher.exeERROR_CODE: (NTSTATUS) 0xc0000409 - <Unable to get error code text>EXCEPTION_CODE_STR: c0000409EXCEPTION_PARAMETER1: 00000007STACK_TEXT: WARNING: Stack unwind information not available. Following frames may be wrong.0813ec98 08ba784f 6e760038 00000000 00000000 nvoglv32!vk_optimusGetInstanceProcAddr+0xc549d0813ecec 08ba79b0 0c870048 0c870048 00000000 nvoglv32!DrvPresentBuffers+0x2971f0813ed34 08c830d8 0c870048 00000045 0c870048 nvoglv32!DrvPresentBuffers+0x298800813ed50 08c8853a 0000ffff 0c870048 0000005b nvoglv32!DrvPresentBuffers+0x104fa80813ed70 08c7739d 0c870048 00000045 0c870048 nvoglv32!DrvPresentBuffers+0x10a40a0813f030 08c77dbc 01870048 0813fba0 0813f200 nvoglv32!DrvPresentBuffers+0xf926d0813f1bc 081f85f2 0013f601 0c870048 0813f6a4 nvoglv32!DrvPresentBuffers+0xf9c8c0813f218 08b56073 00000001 00000001 00000001 nvoglv32+0xb85f20813f248 08c5b992 16eac138 0813f6a4 0c870048 nvoglv32!DrvValidateVersion+0x5e930813f688 0820ef6d 0c870048 0813f6a4 00000002 nvoglv32!DrvPresentBuffers+0xdd8620813fdfc 08930061 01000000 00000000 00000000 nvoglv32+0xcef6d0813fe3c 0830d1d2 00000000 00000000 00000140 nvoglv32+0x7f00610813fe64 088fe217 00000000 00000000 00000140 nvoglv32+0x1cd1d20813fea8 089ea0fb 0a3b1040 00000000 00000d44 nvoglv32+0x7be2170813fee0 089e9e2f 0a3b1040 08b5b100 08b5b100 nvoglv32+0x8aa0fb0813fef8 08b5b122 0a867540 07e40080 0813ff18 nvoglv32+0x8a9e2f0813ff08 75d26359 0a867540 75d26340 0813ff74 nvoglv32!DrvValidateVersion+0xaf420813ff18 778a7c24 0a867540 59857cfe 00000000 kernel32!BaseThreadInitThunk+0x190813ff74 778a7bf4 ffffffff 778c8ff3 00000000 ntdll!__RtlUserThreadStart+0x2f0813ff84 00000000 08b5b100 0a867540 00000000 ntdll!_RtlUserThreadStart+0x1b
Cause call stack overflow error
Stack overflow is an error that a user mode thread may encounter. There are three possible reasons for this error:
The thread uses the entire stack reserved for it. This is usually caused by infinite recursion.
The thread was unable to extend the stack because the pagefile has run out, so it cannot commit any other pages to extend the stack.
The thread cannot extend the stack because the system is in a short time to extend the pagefile.
Investigation process
1. ~ * shows the crashed thread. The. In front of the thread number indicates the current thread, # indicates the abnormal thread, and then switches to the crashed thread ~ 1s, switches to thread 1.
0:002> ~* 0 Id: 1658.c64 Suspend: 1 Teb: 00d5d000 Unfrozen "" Start: lec_teacher!WinMainCRTStartup (00367c52) Priority: 0 Priority class: 32 Affinity: ff# 1 Id: 1658.d44 Suspend: 0 Teb: 00d78000 Unfrozen Start: nvoglv32!DrvValidateVersion+0xaf20 (08b5b100) Priority: 0 Priority class: 32 Affinity: ff. 2 Id: 1658.213c Suspend: 1 Teb: 00d7b000 Unfrozen Start: nvoglv32!vk_optimusGetInstanceProcAddr+0xc6b3f (08f28d5f)0:002> ~1seax=00000001 ebx=00000000 ecx=00000007 edx=000001e3 esi=10e8b840 edi=00000007eip=08f276bd esp=0813e884 ebp=0813ec98 iopl=0 nv up ei pl nz na po nccs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000202nvoglv32!vk_optimusGetInstanceProcAddr+0xc549d:08f276bd cd29 int 29h
2. Check TEB (Thread Environment Block). If you already have a pdb, you can use it directly! teb. If you don't have a symbol table, you can display the memory for mapping dd 00d78000 L4
0:001> !tebTEB at 00d78000 ExceptionList: 0813ff64 StackBase: 08140000 StackLimit: 0812d000 SubSystemTib: 00000000 FiberData: 00001e00 ArbitraryUserPointer: 00000000 Self: 00d78000 EnvironmentPointer: 00000000 ClientId: 00001658 . 00000d44 RpcHandle: 00000000 Tls Storage: 355531b8 PEB Address: 00d5a000 LastErrorValue: 203 LastStatusValue: c0000100 Count Owned Locks: 0 HardErrorMode: 00:001> dd 00d78000 L400d78000 0813ff64 08140000 0812d000 00000000
3. To explain this, you need to find the definition of the TEB data structure and check the ntpsapi.h file in the Microsoft Windows SDK.
typedef struct _TEB { NT_TIB NtTib; PVOID EnvironmentPointer; CLIENT_ID ClientId; PVOID ActiveRpcHandle; PVOID ThreadLocalStoragePointer; PPEB ProcessEnvironmentBlock; ULONG LastErrorValue; ..... PVOID DeallocationStack; .....} TEB;typedef struct _NT_TIB { struct _EXCEPTION_REGISTRATION_RECORD *ExceptionList; PVOID StackBase; PVOID StackLimit; .....} NT_TIB;
This indicates that the second and third DWORD in the TEB structure point to the bottom and top of the stack, respectively. In this case, the addresses are 0x08140000 and 0x0812d000. (the stack grows down in memory.) You can use? To calculate the stack size .
0:001> ? 08140000 - 0812d000Evaluate expression: 77824 = 00013000
This indicates that the stack size is 76K. The maximum stack size is stored in the field DeallocationStack. After some calculation, you can determine that the offset of this field is 0xE0C. If there is a sign table, you can use dt teb to complete the above calculation, and you can directly find the offset.
The maximum stack size is 1048576 = 1M, so the maximum stack size is 1M, which means there is enough stack space left.
0:001> dd 00d78000+e0c L100d78e0c 080400000:001> ? 08140000 - 08040000Evaluate expression: 1048576 = 00100000
In addition, this process looks clean - by using a stack based data structure that is too large, it does not recurse infinitely or exceed its stack space.
4. Now go to KD and use !vm extension command to view the memory usage of the whole system: but you need to set permissions
0:002> .breakin Break instruction exception - code 80000003 (first chance)ntoskrnl!_DbgBreakPointWithStatus+4:80148f9c cc int 3kd> !vm *** Virtual Memory Usage *** Physical Memory: 16268 ( 65072 Kb) Page File: \??\C:\pagefile.sys Current: 147456Kb Free Space: 65988Kb Minimum: 98304Kb Maximum: 196608Kb Available Pages: 2299 ( 9196 Kb) ResAvail Pages: 4579 ( 18316 Kb) Locked IO Pages: 93 ( 372 Kb) Free System PTEs: 42754 ( 171016 Kb) Free NP PTEs: 5402 ( 21608 Kb) Free Special NP: 348 ( 1392 Kb) Modified Pages: 757 ( 3028 Kb) NonPagedPool Usage: 811 ( 3244 Kb) NonPagedPool Max: 6252 ( 25008 Kb) PagedPool 0 Usage: 1337 ( 5348 Kb) PagedPool 1 Usage: 893 ( 3572 Kb) PagedPool 2 Usage: 362 ( 1448 Kb) PagedPool Usage: 2592 ( 10368 Kb) PagedPool Maximum: 13312 ( 53248 Kb) Shared Commit: 3928 ( 15712 Kb) Special Pool: 1040 ( 4160 Kb) Shared Process: 3641 ( 14564 Kb) PagedPool Commit: 2592 ( 10368 Kb) Driver Commit: 887 ( 3548 Kb) Committed pages: 45882 ( 183528 Kb) Commit limit: 50570 ( 202280 Kb) Total Private: 33309 ( 133236 Kb) .....
First, look at the usage of non paging and paging pools. Both are within limits, so that's not the reason for the problem.
Next, look at the number of submitted pages: 183528 in 202280. It's very close to the limit. Although this display does not show that this number is completely at the limit, remember that other processes are running on the system while performing user mode debugging. Each time the NTSD command is executed, these other processes are also allocating and releasing memory. This means that you don't fully understand the state of memory when a stack overflow occurs. Given the proximity of the number of submitted pages to the limit, it is reasonable to conclude that the page file has been used up at some point, which can lead to a stack overflow.
It's not uncommon, and the target application doesn't really go wrong. If this happens frequently, you may want to consider increasing the initial stack commitment for failed applications. The probability is very small.
5. View the stack space size of the last application of the last function
The function starts by saving the base address and takes the esp as the ebp. The next instruction is the requested space required by the current local variable, sub esp, 10h. This means that the local variable takes up 16 bytes. Because the stack moves from the high address to the low address, it is sub.
The final application space is not big, 16 bytes
08f27608 55 push ebp08f27609 8bec mov ebp, esp08f2760b 83ec10 sub esp, 10h
Through the above, we can basically find out the cause of the call stack overflow error
There is also an incorrect call stack, we need to find the correct call stack to judge whether there is a problem
WARNING: Stack unwind information not available. Following frames may be wrong.
This warning indicates that the debugger is not sure if the frames in the call stack listed after this message are correct.
0:001> kb *** Stack trace for last set context - .thread/.cxr resets it # ChildEBP RetAddr Args to Child WARNING: Stack unwind information not available. Following frames may be wrong.00 0813ec98 08ba784f 6e760038 00000000 00000000 nvoglv32!vk_optimusGetInstanceProcAddr+0xc549d01 0813ecec 08ba79b0 0c870048 0c870048 00000000 nvoglv32!DrvPresentBuffers+0x2971f02 0813ed34 08c830d8 0c870048 00000045 0c870048 nvoglv32!DrvPresentBuffers+0x2988003 0813ed50 08c8853a 0000ffff 0c870048 0000005b nvoglv32!DrvPresentBuffers+0x104fa804 0813ed70 08c7739d 0c870048 00000045 0c870048 nvoglv32!DrvPresentBuffers+0x10a40a05 0813f030 08c77dbc 01870048 0813fba0 0813f200 nvoglv32!DrvPresentBuffers+0xf926d06 0813f1bc 081f85f2 0013f601 0c870048 0813f6a4 nvoglv32!DrvPresentBuffers+0xf9c8c07 0813f218 08b56073 00000001 00000001 00000001 nvoglv32+0xb85f208 0813f248 08c5b992 16eac138 0813f6a4 0c870048 nvoglv32!DrvValidateVersion+0x5e9309 0813f688 0820ef6d 0c870048 0813f6a4 00000002 nvoglv32!DrvPresentBuffers+0xdd8620a 0813fdfc 08930061 01000000 00000000 00000000 nvoglv32+0xcef6d0b 0813fe3c 0830d1d2 00000000 00000000 00000140 nvoglv32+0x7f00610c 0813fe64 088fe217 00000000 00000000 00000140 nvoglv32+0x1cd1d20d 0813fea8 089ea0fb 0a3b1040 00000000 00000d44 nvoglv32+0x7be2170e 0813fee0 089e9e2f 0a3b1040 08b5b100 08b5b100 nvoglv32+0x8aa0fb0f 0813fef8 08b5b122 0a867540 07e40080 0813ff18 nvoglv32+0x8a9e2f10 0813ff08 75d26359 0a867540 75d26340 0813ff74 nvoglv32!DrvValidateVersion+0xaf4211 0813ff18 778a7c24 0a867540 59857cfe 00000000 kernel32!BaseThreadInitThunk+0x1912 0813ff74 778a7bf4 ffffffff 778c8ff3 00000000 ntdll!__RtlUserThreadStart+0x2f13 0813ff84 00000000 08b5b100 0a867540 00000000 ntdll!_RtlUserThreadStart+0x1b
First, let's see why the call stack is not correct
Push the call stack manually. For more information about the call stack, please refer to another article https://blog.csdn.net/tuan8888888/article/details/113808589
By printing the memory of ebp, we know that the value of ebp + 1 is the function eip of the upper layer. So the upper function is 08ba784f
Just like the call stack derived automatically, in fact, the automatic push of the call stack is derived by finding each eip frame according to the ebp of the above stack. So it's right before stack 01.
2. Therefore, the call stack is deduced forward from frame 01, and it is found that the latest call stack is incorrect
Because the difference between the function start position 081ed2a0 and the eip = 08f276bd of the current exception is too far (0xD3 A41D), it must not be in the same function, and there is an exception jump.
Exception code analysis
I'm looking at a crash message. In line 08f276b0 of the code, call the function and return whether eax is equal to 0. If eax is equal to 0, soft interrupt (int 29h) will not be triggered. So the problem is that the 08f276b0 function does not return 0 correctly. The code should be an exception callback function. Exit directly.
The soft interrupt int 29h is generated by the method__ Generated by fastfail method, it indicates that the program ends on its own initiative.
Fastfail - the fast failure mechanism of windows system is a mechanism for "fast failure" request, which uses the minimum consumption to end the process, https://docs.microsoft.com/zh-cn/cpp/intrinsics/fastfail?view=msvc-160
In this paper, it is particularly emphasized that user mode fast fail requests appear as a second chance non continuous exception with exception code 0xC0000409. In user mode fast fail requests, as a "second chance non persistent exception", the exception code 0xC0000409 is the same as this one.
11: __fastfail(7);005D1093 B9 07 00 00 00 mov ecx,7 005D1098 CD 29 int 29h
Know the abnormal exit, but do not know the specific reason
Next, let's analyze what's in the esp
0:001> dd esp0813e884 08b5ac64 00000000 0c870048 6e7600380813e894 44542041 61682052 65622073 64206e650813e8a4 63657465 2e646574 6568540a 707061200813e8b4 6163696c 6e6f6974 73756d20 6c6320740813e8c4 2e65736f 450a0a0a 726f7272 646f63200813e8d4 37203a65 7028200a 353d6469 203032370813e8e4 3d646974 36393333 63656c20 6165745f0813e8f4 72656863 6578652e 62323320 0a2974690:001> dd0813e904 7369560a 68207469 3a707474 766e2f2f0813e914 61696469 7375632e 6c656874 6f632e700813e924 70612f6d 6e612f70 72657773 65642f730813e934 6c696174 695f612f 36332f64 662033330813e944 6d20726f 2065726f 6f666e69 74616d720813e954 2e6e6f69 00000000 00000000 000000000813e964 00000000 00000000 00000000 000000000813e974 00000000 00000000 00000000 00000000
Categorize values
Integers: most integers will be smaller values, which means that when displayed as DWORD, they will be mostly zero (for example, 0x00000270).
Pointers: most pointers to local addresses are near stack pointers (for example, fe4cca78).
Status code: usually begins with ac (c0000d6).
Strings: Unicode and ASCII strings can be recognized by the fact that each character has a range of 20-7f. The dc command will display characters on the right.
A miracle happened
What is displayed:
ATDRhasbeen detected.The At the same time, you can see that the content is error code: 7, and the process id and thread id are also correct, indicating that an error has indeed occurred at this time.
The strings that can be displayed on the stack are string arrays, as shown in the following figure
https://nvidia.custhelp.com/app/answers/detail/a_id/3633
Introduction of TDR
https://docs.microsoft.com/zh-cn/windows-hardware/drivers/display/timeout-detection-and-recovery
We can know from the above error that it is caused by the TDR exception, so the call stack is incorrect.
https://www.drivereasy.com/knowledge/a-tdr-has-been-detected-nvidia-opengl-driver-error-solved/
1. Update graphics driver
2. Increase TRD timeout
Posted by Moses at Feb 15, 2021 - 2:19 PM
FAQs
The simplest solution is to carefully inspect the stack trace and detect the repeating pattern of line numbers. These line numbers indicate the code that is being recursively called. Once you detect these lines, look for the terminating condition (base condition) for the recursive calls.
What is stack overflow error and how to fix? ›
A stack overflow is a type of buffer overflow error that occurs when a computer program tries to use more memory space in the call stack than has been allocated to that stack.
How to avoid stack overflow in C? ›
In order to prevent stack overflow bugs, you must have a base case where the function stops make new recursive calls. If there is no base case then the function calls will never stop and eventually a stack overflow will occur.
What is a stack overflow exception? ›
A StackOverflowException is thrown when the execution stack overflows because it contains too many nested method calls. For example, suppose you have an app as follows: C# Copy. using System; namespace temp { class Program { static void Main(string[] args) { Main(args); // Oops, this recursion won't stop. } } }
How do I debug stack smashing detected? ›
TL;DR:
- Enable debugging symbols.
- Rebuild the executable as non-PIE (not position independent) to make addresses reproducible: ...
- Enable core dump generation with: ...
- Identify the function where stack is corrupted.
- Find where stack canary is stored on stack.
- Add a gdb watchpoint and find out where the canary override happens.
What this means is that a certain data type used for storing a piece of data was not large enough to hold the data. For example, if you try to fit twelve cans of soup in a box designed to hold ten cans, two cans will "overflow" that space.
What is meant by an overflow error give an example? ›
In general, a data type overflow error is when the data type used to store data was not large enough to hold the data. Furthermore, some data types can only store numbers up to a certain size. An overflow error will be produced, for example, if a data type is a single byte and the data to be stored is greater than 256.
How do you explain overflow error? ›
In computing, an overflow error is an error that happens when a program receives a number, value or variable outside the scope of its ability to handle. This type of error is somewhat common in programming, especially when dealing with integers or other numerical types of variables.
How to clear stack overflow? ›
The owner of a question or answer can delete their own post by using the Delete link at the bottom of their post. An admin of the team can also perform this action on any user's posts. Clicking delete will offer a confirmation, which may contain additional warnings if the question has answers on it.
How to check overflow condition in stack? ›
Overflow condition: When stack is completely full (i.e. TOP= MaxSize -1 ) and we try to insert more element onto stack then this condition is called overflow condition and no further element could be inserted now until any element is deleted.
The most-common cause of stack overflow is excessively deep or infinite recursion, in which a function calls itself so many times that the space needed to store the variables and information associated with each call is more than can fit on the stack.
What is the limit of stack overflow? ›
Typically, the stack will overflow after between 6,000 and 7,000 steps.
Why is it called stack overflow? ›
Stack Overflow is a question-and-answer website that unites computer programmers worldwide. The site serves as a repository of information about computer programming. It's named after the software error that occurs when a program runs out of memory.
What is the difference between error and exception stack overflow? ›
An error is a mistake that is probably unrecoverable. An exception is an error that can often be handled, so the program can recover. The most common cause of stack overflow is recursion, which means a computer function called itself and is piling way too much stuff on the stack with no way to pop it back off.
What are the 4 steps to debugging? ›
Isolate the source of the bug. Identify the cause of the bug. Determine a fix for the bug. Apply the fix and test it.
Why is debugging so difficult? ›
Debugging : Easy or Difficult? Debugging itself is a very difficult process because of the involvement of humans. Another reason due to which it is considered as difficult because it consumes a large amount of time and resources too.
What type of error is the hardest to debug? ›
Logic errors can be some of the hardest to find, and identifying them often requires using the debugger to carry out careful line-by-line inspection of the code as it is running.
How do I run a Debug test? ›
To start debugging: In the Visual Studio editor, set a breakpoint in one or more test methods that you want to debug. Because test methods can run in any order, set breakpoints in all the test methods that you want to debug. In Test Explorer, select the test method(s) and then choose Debug on the right-click menu.
What is Debug stack trace? ›
Debugging an app often requires working with stack traces. A stack trace generates when your app crashes because of an error or an exception. You can also print a stack trace at any point in your app code using methods such as Thread.
How do you test and Debug your code? ›
Debugging means to run your code step by step in a debugging tool like Visual Studio, to find the exact point where you made a programming mistake. You then understand what corrections you need to make in your code and debugging tools often allow you to make temporary changes so you can continue running the program.
The creek overflows every spring. The water in the tub overflowed.
How can overflow be detected? ›
The rules for detecting overflow in a two's complement sum are simple: If the sum of two positive numbers yields a negative result, the sum has overflowed. If the sum of two negative numbers yields a positive result, the sum has overflowed.
What problems can overflow errors cause? ›
An integer overflow can cause the value to wrap and become negative, which violates the program's assumption and may lead to unexpected behavior (for example, 8-bit integer addition of 127 + 1 results in −128, a two's complement of 128).
What is an example of a round off error? ›
Rounding multiple times can cause error to accumulate. For example, if 9.945309 is rounded to two decimal places (9.95), then rounded again to one decimal place (10.0), the total error is 0.054691.
Which data type may produce an overflow error? ›
Correct Answer
A Linear Queue can produce an overflow error, even if its number of elements is less than its size.
What is overflow and underflow examples? ›
The value is too big for an int or double variable in Java, and there will be an overflow. As a second example, let's say we attempt to assign the value 10-1000 (which is very close to 0) to a variable of type double. This value is too small for a double variable in Java, and there will be an underflow.
Is overflow error a runtime error? ›
In VBA, Overflow (Error 6) is a run-time error that occurs when you specify a number to the variable that is out of the range of numbers which that data type can take. In simple words, this error occurs when you go out of the range for a variable's type.
Will overflow cause a runtime error? ›
Integer overflow itself may not cause run time error, but it can indirectly cause run time error, as in above example.
How to clear stack cache? ›
Just do stack clean --full to clear local cache completely for project. To clean global cache, you can just do rm -rf ~/. stack .
How to get unbanned from stack overflow? ›
Users who are banned are shown this advice for getting out:
The only way to end a question block is to positively contribute to the site... Begin by fixing your existing questions; do not just post the same question again.
Stack Overflow helps people find the answers they need, when they need them. We're best known for our public Q&A platform that over 100 million people visit every month to ask questions, learn, and share technical knowledge.
How to detect overflow in code? ›
Detecting Overflow and Underflow in C
If both numbers are positive and the sum is negative, that means there is an overflow, so we return -1 else; if both numbers are negative and the sum is positive, that also means there is an overflow, so we return -1 else, no overflow.
What is the difference between memory leak and stack overflow? ›
"Memory leak", in brief, refers to the scenario that memory is allocated but not released even if it is no longer needed. A stack overflow itself is NOT causing any unneeded memory to fail to be released.
What is top =- 1 in stack? ›
So top=-1 will initially mean that it is in a empty state and you can say no member is being added to the stack data structure.
What are the types of overflow? ›
hidden - The overflow is clipped, and the rest of the content will be invisible. scroll - The overflow is clipped, and a scrollbar is added to see the rest of the content. auto - Similar to scroll , but it adds scrollbars only when necessary.
How do I fix stack overflow on Windows 10? ›
How to Fix Overrun of a Stack-Based Buffer Issue
- Scan Your Computer for Virus or Malware.
- Run SFC And DISM Command.
- Clean Boot the Computer.
- Perform System Restore.
- Try Startup Repair.
- Back up Data and Reinstall Your Windows.
The effects of an overflow error can vary. It might make the program crash or it might just ignore the extra digit on the left and produce an unexpected result (in this case, 2 + 3 = 0!).
What is the default stack limit? ›
The default stack reservation size used by the linker is 1 MB. To specify a different default stack reservation size for all threads and fibers, use the STACKSIZE statement in the module definition (. def) file.
How do I fix maximum call stack size exceeded? ›
How to Fix Maximum Call Stack Size Exceeded Errors
- Open the Chrome DevTools and navigate to the "Sources" panel.
- Enable "Pause on exceptions" in the "Settings" panel.
- Reproduce the error in your code.
- The DevTools will pause execution at the line of code that caused the error, allowing you to identify and fix the issue.
The default Ingres stack size is 65536 bytes or 64 KB. In general the default Ingres stack_size of 65536 is too small.
Stackexchange is a network of question and answer sites that cover topics in dozens of different fields, while Stackoverflow is focused on programming questions. If you have a technical question related to software development or coding, then Stackoverflow would be the better choice.
How do recruiters use stack overflow? ›
Stack Overflow actually allows recruiters as long as they abide by the rules:
- Disclose the company you're recruiting for,
- Recruit for a specific role (no vague “I have a couple of opportunities”),
- Make sure the role is relevant to candidate's interests,
- Provide background info.
Stack Overflow is where developers and technologists go to gain and share knowledge. Stack Exchange is for non-technical questions and answers such as cooking, biology, and more.
How do you handle stack overflow exceptions? ›
StackOverflowException is thrown for execution stack overflow errors, typically in case of a very deep or unbounded recursion. So make sure your code doesn't have an infinite loop or infinite recursion. StackOverflowException uses the HRESULT COR_E_STACKOVERFLOW, which has the value 0x800703E9.
What are the different types of errors in a stack? ›
There are conventionally two error cases in a stack: Popping something off an empty stack, and pushing something on a full-stack. In our implementation each element has a pointer to the next element, eliminating the latter error type.
How to avoid overflow error in Java? ›
The best way to avoid integer overflow or underflow errors is by making sure that the variable used for storing integer values is allocated the right amount of memory. For Java, the following types are available for storing integers: Type byte: 8 bits for storing the range -127-128.
How to debug error in stored procedure? ›
To debug stored procedures
- In Solution Explorer, right-click the TradeDev project and select Add, then Stored Procedure. ...
- Paste the following code to the store procedure. ...
- Press F5 to build and deploy the project.
- In SQL Server Object Explorer, under the Local node, right-click TradeDev database and select New Query.
In the event of a stack overflow, for example, there is no more stack space to potentially use a “try-catch”. This is similar to the out of memory scenario, you simply do not have memory to handle the problem once detected.
How to debug error in SQL Server? ›
Debugging a SQL query
- Go to the line that is failing in your SQL query. ...
- Check the SQL syntax on the line that is failing in your SQL query.
- Check your query logic if the query uses joins, subqueries, or CTEs.
- If you get an error message that isn't specific to your SQL query, go to Troubleshooting error messages.
To debug a client script:
- Navigate to the form where the issue is encountered. ...
- Open your browser's Developer tools and navigate to the Console tab.
- Refresh the form.
- Review the console for JavaScript errors and use them to investigate scripts that are running on the form. ...
- Click the <table name>.
How to debug shell scripts
- When a script does not work properly, we need to determine the location of the problem. ...
- #!/bin/sh -x. ...
- $ sh -x script_name. ...
- echo $HOME # echo the HOME directory path. ...
- echo $HOME # echo the HOME directory path. ...
- + echo /home/user. ...
- # cat script.sh #!/bin/sh set -x echo "Your home is : $HOME" set +x.
You can use either RAISERROR or THROW (which I believe it was implemented in 2012). You don't need the variable or the count either. You could also end the procedure without an error by using RETURN. If you return a value different to 0, you can use it as an indicator of some error in the application code.
How do you know if overflow has occurred? ›
The rules for detecting overflow in a two's complement sum are simple: If the sum of two positive numbers yields a negative result, the sum has overflowed. If the sum of two negative numbers yields a positive result, the sum has overflowed.
How do you detect a long overflow? ›
To check for Long overflow, we need to check the Long. MAX_VALUE with the multiplied long result, Here, Long. MAX_VALUE is the maximum value of Long type in Java.
Which of the following causes a stack overflow error? ›
The most-common cause of stack overflow is excessively deep or infinite recursion, in which a function calls itself so many times that the space needed to store the variables and information associated with each call is more than can fit on the stack.
How do I resolve a question in stackoverflow? ›
Choose one answer that you believe is the best solution to your problem. To mark an answer as accepted, click on the check mark beside the answer to toggle it from greyed out to filled in. You may change which answer is accepted, or simply un-accept the answer, at any time.
What is the difference between exception and error stackoverflow? ›
Errors are mainly caused by the environment in which application is running. For example, OutOfMemoryError occurs when JVM runs out of memory or StackOverflowError occurs when stack overflows. Exceptions are mainly caused by the application itself.
How do I debug a SQL query? ›
Debugging options
- Start Debugging. To start debugging a SQL server stored procedure in SQL Server, press ALT + F5, or go to Debug -> Start Debugging, as shown in the figure below: ...
- Stepping Through Script. ...
- Run To Cursor. ...
- The Local Window. ...
- The Watch Window. ...
- The Call Stack. ...
- The Immediate Window. ...
- Breakpoints.
SQL Debugger is an advantageous feature of dbForge Studio for SQL Server allowing you to troubleshoot Transact-SQL scripts, stored procedures, triggers, and functions quickly and easily.
How do you debug a trigger? ›
One of the simplest ways to debug triggers is to use the DBMS_OUTPUT package to print messages, values, or errors to the standard output. You can use the PUT_LINE procedure to display a single line of text, or the PUT procedure to append text to a buffer.
