memory-leaks

问题 This leaks like mad, due to the way I use enumerators. Why? It leaks even more severely if I don't release the enumerator - I understand that much.. but I don't understand why this still leaks. #import <Foundation/Foundation.h> int main (int argc, const char * argv[]) { NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; // insert code here... NSLog(@"Hello, World!"); // Create an array and fill it with important data! I'll need to enumerate this. NSMutableArray *myArray = [

问题 I am working on a subgraph matching problem (match chemical functional groups within molecules). The original code was written by another student (under Visual C++, no MS specific libraries) and it ran fine on Windows . I then added new functions to the program but did not alter the algorithm for the subgraph matching, and the new program compiled fine under gcc4.2/Mac OS X. However I am running into strange problems during runtime! The objects & their members that are relevant here: Atom:

问题 I am having serious troubles with processing a big number of xml files using XmlDocument . The idea is to extract from about 5000 .xml docs (approx. 20 MB each) a certain data, which is saved in text format and then imported into MySQL DB. This task is supposed to be done every day. My problem is that after processing of each xml file, the system memory is not releasing it. So, all the documents are pilling up, until all the RAM is occupied and the application starts to run very slowly (once

问题 i am currently experiencing a problem were i get *** glibc detected *** ./efit: free(): invalid next size (fast): 0x00000000006127f0 *** with the usual memory map and backtrace information that comes with a glibc error. i am, however, unable to find the cause of this problem. it seems like (basically) my entire program is finished by the time this happens. one thing i read online is that this could be due to lack of deallocation. now, i have been running the program without deallocating a few

问题 i am currently experiencing a problem were i get *** glibc detected *** ./efit: free(): invalid next size (fast): 0x00000000006127f0 *** with the usual memory map and backtrace information that comes with a glibc error. i am, however, unable to find the cause of this problem. it seems like (basically) my entire program is finished by the time this happens. one thing i read online is that this could be due to lack of deallocation. now, i have been running the program without deallocating a few

问题 I've been trying to figure out why a JavaFX based application I am working on uses up so much memory. I noticed memory went up each time I opened a new tab in the application, and wasn't being GC after I had closed the tab. I would keep opening and closing tabs until eventually it ran out of memory and crashed. So I wrote and tried a very simple program and GUI. The code is below. What I found was that if I set the items in the TableView to null, cleared out the ArrayList, and instantiated a

问题 I'm checking for leaks in Instruments, and I've set to check every second, but no leaks are appearing. I'm sure there must be some in my app, is there anything which could stop these from appearing? Is there a good way I can create a leak so that I can test if leaks do show up in Instruments? Thanks! 回答1: You're only going to find leaks with a tool if an object is allocated but no longer referenced. Another type of "leak" is to hold a reference to something that you didn't intend to. This

问题 Which strings ought I to free in C on my own, using free() ¹? My state of knowledge: char a[256]; : no char *a = "abcdefg"; : no char *a = malloc(15L); : yes a string returned by getenv() : no strings returned by Windows functions²: ??? ¹ or LocalFree()/ GlobalFree() / VirtualFree() ² in particular by GetCommandLineW() 回答1: This will always be mentioned in the documentation for any API you use that returns strings (or other data larger than a single simple value such as an integer). Yes, this

问题 I've got a Glassfish v3 server running a few web applications (servlets, JSP, JDBC). I'd been noticing that if I let Glassfish run for a long time, it will consume all of the memory available (this is running on a server with 750 MB of memory). I figured that there must be a memory leak, so I ran the server while monitoring it with JProfiler and noticed that when I get a peak in traffic, my memory usage shoots up (as expected), but then quickly drops back down. I'm wondering if the issue is

问题 I'm working on tests to detect memory leaks for classes. I do this with the following pattern: Get initial memory in test setup (using GC.GetTotalMemory(true) ) Perform operations, such as instantiation of objects Dispose object (through useage block) Get memory in test tear down (using the same method again, all objects are out of scope and therefore should be garbage collected) Ideally, assert that the different between initial and end memory = 0 Using memory profiling tools in my tests, I