how to use valgrind to find memory leaks

Original article: http://blog.yam.com/ddy1280/article/3064451 Recently, we found that memory leaks exists in the program used by YACC Lex.It took some time to complete the division and finally found the problem in YACC Lex.Mtrace is a good tool to help me catch these problems. Mtrace is a function provided by gnu c/C ++ (Linux platform ).Using a ticket with GCC-g in addition to metadata, you can easily

Message Queuing (MessageQueue).A message is removed from the MessageQueue once per loop. The corresponding message handler function is then recalled.Suppose, I mean, if there's a message in the loop body that's not processed (in the message queue), then handler will always be there. The reference count of the handler external class (typically activity) is not 0, so the external class cannot be garbage collected.This is why very many people encounter activity OnDestroy methods that have not been

!_heap_alloc_dbg_impl+0x000001f6102CFB2F msvcr90d!_nh_malloc_dbg_impl+0x0000001f102CFADC msvcr90d!_nh_malloc_dbg+0x0000002c102db25b msvcr90d!malloc+0x0000001b102bd691 Msvcr90d!operator new+0x00000011102bd71f Msvcr90d!operator new[]+0x0000000f4113d8 test2! allocatememory+0x0000002841145C test2!wmain+0x0000002c411a08 test2!__tmaincrtstartup+0x000001a841184f test2!wmaincrtstartup+0x0000000f 7c816fd7 kernel32! baseprocessstart+0x00000023 Article translations and excerpts from: http://www.codeproje

Original source: http://www.cnblogs.com/lidabo/p/5514100.html Recently, I heard that pthread_create will cause memory leaks, it is incredible, so the POSIX (NPTL) thread creation and destruction are analyzed. Analysis results: if used incorrectly, it does cause a memory leak. root cause : Pthread_create The thread created by default is detached. Prevention: Eit

, press the ALT key (Lion) to appear always open with, then open the whole process, right-click, and then press ALT until you open it.Resources:Go Tool pprofHttps://github.com/hyper-carrot/go_command_tutorial/blob/master/0.12.mdPprof Use of GoHttp://www.cnblogs.com/yjf512/archive/2012/12/27/2835331.htmlProfiling Go ProgramsHttps://blog.golang.org/profiling-go-programsMemory leak or consumption analysisKey codeFM, ERR: = OS. OpenFile ("./tmp/mem.out",

Recently, I heard that pthread_create will cause memory leaks, it is incredible, so the POSIX (NPTL) thread creation and destruction are analyzed.Analysis results: If used incorrectly, it does cause a memory leak. Root cause: Pthread_create The thread created by default is detached. Prevention: either create a detached thread, or the thread thread start_routine b

This is a creation in Article, where the information may have evolved or changed. Go provides the PPROF package for code performance monitoring in two locations with packages: Net/http/pprof Runtime/pprof In fact, net/http/pprof only use the RUNTIME/PPROF package to encapsulate a bit, and exposed on the HTTP port. Performance monitoring of Web servers using Net/http/pprof If your go program is a Web server that starts with an HTTP pac

In our code, there are times when you add a reference to a data object in a control. For example, use the Tag property of the tree node to save the object so that it can be easily accessed in the interface operation. Because the data is not referenced elsewhere, we expect the garbage collection mechanism to reclaim the appropriate memory when the control is destroyed. But when the software runs for a while,

In iOS 5.0 and later versions, the ARC mechanism is added. However, memory leakage may still exist due to the complicated mutual reference relationship. Therefore, it is important to understand the principles.This article describes how to use Instruments to find memory leaks

Recently, in an s60 3rd project, I debugged a memory leak error, but I still cannot find the problem. I thought that I had encountered a hooklogger tool to detect memory leaks, So I downloaded it. After trying it out, it worked quite well and soon found the location where the error occurred. The following describes how

Label:Original address: Http://www.cnblogs.com/Lawson/archive/2011/01/23/1942692.html Very early to see the knowledge of Windbg+sos, has not studied carefully, perhaps because his system is not enough complex, and no online real-world view of the rights, has not learned this knowledge, in recent days carefully found this information, I also wrote a possible high CPU high memory test Web page , found that really good, even if a novice, you can also

I have seen windbg + SOS knowledge for a long time and have never studied it carefully. Maybe the system I have built is not complex enough and I have no permission to view it in the real online environment, I have never learned this knowledge. I have carefully searched for this information in recent days and wrote a test web page that may result in high CPU and high memory, even if you have a chance, you can use