access-violation | 易学教程

Exception thrown: read access violation. dynamicArray was 0x1118235. occurred

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问题 #include "pch.h" #include <iostream> #include <string> using namespace std; int **dynamicArray ; int ROWS, COLUMNS; //--------------------------------- int input_matrix(int ROWS, int COLUMNS) { //--------------------------------------- //memory allocated for elements of rows. int **dynamicArray = new int *[ROWS]; //memory allocated for elements of each column. for (int i = 0; i < ROWS; i++) dynamicArray[i] = new int [COLUMNS]; //free the allocated memory for (int i = 0; i < ROWS; i++) delete[

Accessing outside the memory allocated by the program. (Accessing other app's memory)

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问题 Is there a way to access (read or free) memory chunks that are outside the memory that is allocated for the program without getting access violation exceptions. Well what I actually would like to understand apart from this, is how a memory cleaner (system garbage collector) works. I've always wanted to write such a program. (The language isn't an issue) Thanks in advance :) 回答1: The simple answer (less I'm mistaken), no. Generally it's not a good idea for 2 reasons. First is because it causes

VC++ 6.0 access violation when run in debugger

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I am trying to add enhancements to a 4 year old VC++ 6.0 program. The debug build runs from the command line but not in the debugger: it crashes with an access violation inside printf(). If I skip the printf, then it crashes in malloc() (called from within fopen()) and I can't skip over that. This means I cannot run in the debugger and have to rely on the old printf statements to see what's going on. This obviously makes it a lot harder. Any idea why printf() and malloc() would fail when running under the VC++ debugger? I am no good at this low level stuff! Here is the call stack after the

What to do when AccessViolationException in .NET 4 app defies MSDN documented behavior?

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问题 I have a .NET 4 Application written as a Windows Service, that includes unmanaged components, and is printing an AccessViolationException to my log4net logs, but is not crashing the application. Everything about this issue sounds impossible. Below is what I think is happening, and I am wondering what my next steps as the developer should be? This issue is NOT happening in a parallel replay environment with the same data feed as Production. The memory corruption issue manifests as an

VC++ 6.0 access violation when run in debugger

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问题 I am trying to add enhancements to a 4 year old VC++ 6.0 program. The debug build runs from the command line but not in the debugger: it crashes with an access violation inside printf(). If I skip the printf, then it crashes in malloc() (called from within fopen()) and I can't skip over that. This means I cannot run in the debugger and have to rely on the old printf statements to see what's going on. This obviously makes it a lot harder. Any idea why printf() and malloc() would fail when

log4cpp crashing while loading properties file

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问题 I am implementing log4cpp im my project. See my Logger class implemented in the project. It is crashing in function doConfigure(initfile) defined in PropertyConfiguratorImpl.cpp file. More specifically in function call to _properties.load(in) call in Propertices.cpp file of the log4cpp: void Properties::load(std::istream& in)//_Chcount=0 in the expression value { clear(); std::string fullLine, command; std::string leftSide, rightSide; char line[256]; std::string::size_type length; while (in

need explanation on why does EXCEPTION_ACCESS_VIOLATION occur

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问题 Hi I know that this error which I'm going to show can't be fixed through code. I just want to know why and how is it caused and I also know its due to JVM trying to access address space of another program. A fatal error has been detected by the Java Runtime Environment: EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x6dcd422a, pid=4024, tid=3900 JRE version: 6.0_14-b08 Java VM: Java HotSpot(TM) Server VM (14.0-b16 mixed mode windows-x86 ) Problematic frame: V [jvm.dll+0x17422a] An error

c - Access violation when reading array

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I am trying to read an array of data and receiving an access violation. I can read the data from the array within the function that the array was allocated using: AllCurrentData[newLineCount].data[tabCount] = malloc(length + 1); strcpy( AllCurrentData[newLineCount].data[tabCount], buffer ); printf("%s", AllCurrentData[newLineCount].data[tabCount]); But can't read it outside of the function. This is where I get the access violation, looks like it is trying to read a null location. How can I access the data in the array AllCurrentData in a different function? thanks! Extra info: typedef struct

C++ Access violation reading why?

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问题 I'm developing the application, which will get mails from servers via pop/imap protocols using C++/Winsock. Cause, the code is large to paste here , I give you the link on pastebin: http://pastebin.com/uCKcTQsj It doesn't have any compiler errors, so it can be copmpiled well. I'm getting different result of its work, sometimes all working ok, but often I get the result: Unhandled exception at 0x773f15de (ntdll.dll) in alex.exe: 0xC0000005: Access violation reading location 0x00648000. Why do

How to test handling of AccessViolationException

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问题 I need to write a test which verifies that my code can handle an AccessViolationException (or any other WIN32 Corrupted State Exception - CSE), which occours in an unsafe context, typically by calling a 3rd party lib. This should all be done using C# on .net 4.0. I found this related question How to handle AccessViolationException and this related article http://dotnetslackers.com/articles/net/All-about-Corrupted-State-Exceptions-in-NET4.aspx, which explains how to catch these CSE's and their