how to debug memory leak

1 not-freed blocks==19044== Checked 64,184 bytes= =19044== ==19044== 1,024 bytes in 1 blocks is definitely lost in loss record 1 of 1==19044== at 0x4a0720a:malloc (vg_ replace_malloc.c:296) ==19044== by 0x4004d5:main (in/home/zhang/document/checker) ==19044== ==19044== LEAK SUMMARY:==1 9044== definitely lost:1,024 bytes in 1 blocks==19044== indirectly lost:0 bytes in 0 blocks==19044== possibly lost:0 bytes in 0 blocks==19044== still reachable:0 byte

-20,froyo2.3 2010-12-6, Gingerbread3.0 2011-2-22, Honeycomb4.0 2011-10-11 Ice Cream Sandwich* *Understanding the history of source code is very useful for us to analyze the Android codes.OK, start analyzing the code.First, look at the setbackgrounddrawable (drawable background) method source code inside a line to draw our attention: Public void setbackgrounddrawable (drawable background) { // ... Background.setcallback (this); // ... ...}So Sbackground maintains

allocate a lot of memory space, and the array will not be released in time.5, try to use the object pool technology to improve the system performance; long-life objects with short life-cycle objects are easy toWhen a memory leak is raised, such as when a large collection object has a business object with large data volumes, it can consider chunking for processin

in 10595msCheck/data/MISC/object should be able to see the heap-dump-tm1291081439-pid100.hprof:ls /data/misc/...heap-dump-tm1291081439-pid100.hprof... Open ShellexitThe ADB pull captured the case.adb pull /data/misc/heap-dump-tm1291081439-pid100.hprof Through hprof-Conv, the attack cases captured by zookeeper are converted into the format recognized by memory Analyzer:hprof-conv heap-dump-tm1291081439-pid100.hprof debug.hprof Start eclipse, sele

Three, memory monitoring tool DDMS--HeapNo matter how careful it is, it is impossible to avoid bad code altogether, and tools are needed to help us check if there is a memory leak in the code. The DDMS in Android tools comes with a very good memory monitoring tool heap (here I use the Eclipse ADT Plugin, and in the cas

Here's how to use instruments to find memory leaks in programs and use nszombieenabled settings without arc.This article assumes that you are already familiar with the OBJ-C memory management mechanism.Experimental development environment: XCode 4.5.21. Run DemoDownload a demo that implements a ready-to-go memory leak:

Original blog, reprint please indicate the sourceBlog.csdn.net/hello_hwc Welcome to my iOS SDK detailed columnBlog.csdn.net/column/manage.html?alias=huangwenchen-ios-sdk Foreword: The plan is July update instrument and debug related blog, but today just encountered a memory leak problem. The May data Persistence section still has three or so not updated, June foc

Android App Memory Leak tool (1) using the Memory Monitor tool ddms–> HeapOperation Steps After you start eclipse, switch to the DDMS perspective and make sure that the devices view, the heap view, are open, and that you do not open the direct window>showview> Link your phone to your computer via USB. The link needs to confirm that the phone is in "USB

Android App Memory Leak tool (1) Use Memory Monitor tool ddms–> HeapOperation Steps After you start eclipse, switch to the DDMS perspective and make sure that the devices view, the heap view, are open, and that you do not open the direct window>showview> Link your phone to your computer via USB and confirm that your phone is in "USB

embedded devices, and embedded devices are usually not highly configurable due to some well-known conditions, especially when memory is relatively limited. If we write code that has too much memory usage, it will inevitably make our device run slowly, or even crash. To enable Android apps to run safely and quickly, each Android application uses a proprietary Dalvik virtual machine instance that is hatched

) { Cursor.close (); } Break Default LOG.E (TAG, "onquerycomplete called with unknown token" + token); } } } Copy Code code as follows: @Override protected void OnStop () { Super.onstop (); Mlistadapter.changecursor (NULL); } is not to underestimate the Asyncqueryhandler, Google in the early version of there are some such code, not to mention that we do not pay attention to, in fact, many of the online use of Asyncqueryhandler examples have made this

1. What is a memory leak?Memory leak refers to the dynamic application of memory in the program after use, no release, resulting in this part of the memory is not reclaimed by the system, over time, may cause the program

Memory Overflow (OOM): a situation in which running memory is larger than available memory. For example, the application of an integer space, the result is stored only a long to store the data memory leak (memory

Common memory leak lookup methods see: http://hukai.me/android-performance-patterns/This article is an example of Google's release of the Android performance optimization paradigm, which provides a good demonstration of rendering, memory GC, and power consumption.Here I summarize the following, common memory leaks in A

What is the memory leak in the program? We have written many programs with the keyword Free (). For example, I am in this post about some of the important operations of the list (Important operations on a Linked list) to delete the entire list of this function, the code snippet is as follows:struct node * deletelist (struct node * head) { struct node * temp; while (Head! = NULL) { =

[Android] [Memory Leak] Inputmethodmanager memory leak phenomenon and its solutionphenomena : on the k_touch_v9 model of a particular model , an interface appears Inputmethodmanager hold a Activity, causes the Activity cannot be recycled . if the Activity be opened again , then the old ones will be released. , but the

Original: https://vld.codeplex.com/Visual Leak Detector is a memory leak detection tool dedicated to Visual C + +, which is free, open source, and highly robust.VLD is easy to use:1. After installing VLD, just tell Visual C + + where to find its header files and libraries. (: https://vld.codeplex.com)2. You can then use VLD by adding the following line of code to

. the only exception is stdafx. H (or any other precompiled header ). a precompiled header, such as stdafx. h, must always be the first header encoded in a source file, so VLD. h must be encoded ded after any precompiled headers.2. if your program contains one or more DLLs that you wowould also like to check for memory leaks, then also include VLD. h in at least one source file from each DLL to be removed ded in l