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Topic: Memory debugger

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Valgrind

	Encyclopedia: Memory debugger
		Memory leaks are often thought of as failures to release unused memory by a computer program.
		Purify is a memory debugger program used by software developers to detect memory access errors in programs, especially those written in C or C++.
		Insure++ is a memory debugger computer program, used by software developers to detect various errors in programs written in C and C++.
	www.nationmaster.com /encyclopedia/Memory-debugger (729 words)

	NOVELL: NetWare 5 Memory Debugging Features (NetWare Cool Solutions) (Site not responding. Last check: 2007-10-07)
		Buffer overrun and freed memory access detection is accomplished by aligning the end of each allocated memory buffer with the end of a page boundary and positioning a guard page after the allocated memory.
		Memory allocation debugging is enabled for a single NLM basis when the NLM is loaded.
		Using the debug feature increases the amount of memory used for memory allocations substantially, but this is somewhat offset by the fact that the debug feature is on a per NLM basis and is not system wide.
	www.novell.com /coolsolutions/netware/features/a_memdbug_nw.html (706 words)

	Etnus - TotalView - Memory (Site not responding. Last check: 2007-10-07)
		TotalView’s memory debugger is flexible, letting you filter out information you don't want, focusing on the types of errors that interest you most.
		Explore the state of any memory block, find where it is allocated or deallocated, or even tag a block with the pointer queries feature.Tagging tells TotalView to raise an event when the tagged block is freed or reallocated.
		Memory block painting – A handy way to ensure your program does not access uninitialized areas of memory, painting is used most often to detect problems on deallocation.
	www.etnus.com /TotalView/Memory.html (1483 words)

	Linux Development Tools: Tools - Debugging (Site not responding. Last check: 2007-10-07)
		Debauch is a memory allocation debugger for C which has been modified from memleak from the XFree86 project.
		The debug memory allocation or dmalloc library is a drop-in replacement for the system's native memory management routines.
		GVD, the GNU Visual Debugger, is an extensible graphical debugger licensed under the GNU General Public License and written in Ada using GNAT and the GtkAda graphical toolkit.
	www.hotfeet.ch /~gemi/LDT/tools_deb.html (3986 words)

	How and Why to buy a Runtime Debugger
		A typical symptom of such debuggers is that a pointer can "hop" from one memory block into another without being detected as an error, as shown in Figure 1.
		Other runtime debuggers are able to detect exactly which line of source code actually caused the memory to leak, and are thus much easier to use to solve this type of problem.
		Some runtime debuggers support a "test coverage" tool which is used to analyze the amount of your source code that has actually been tested.
	www.parasoft.com /jsp/products/article.jsp?articleId=290&product=Insure (1785 words)

	OpenVMS Debugger Manual (Site not responding. Last check: 2007-10-07)
		The debugger also displays source lines automatically when it suspends execution at a breakpoint or watchpoint or after a STEP command, or when a tracepoint is triggered (see Section 2.3).
		In screen mode, if the debugger cannot locate source lines for the routine in which execution is currently paused, it tries to display source lines in the next routine down on the call stack for which source lines are available.
		The debugger checks that the value assigned, which can be a language expression, is consistent with the data type and dimensional constraints of the variable.
	pupgg.princeton.edu /cdrom12/html/ssb71/4538/4538p003.htm (3906 words)

	Chapter 11 - The Source Code Debugger
		For the debugger to be able to process all of these tasks, a table is created establishing a link between the source code and the object code generated by the compiler.
		Since the debugger can halt a program only in-between two commands but not actually in the middle of a command, the debugging command in these cases does not become effective until the command has been concluded.
		Memory windows are used to view the content of RAM memory.
	www.berkhan.de /basic/manual_7/manual_e/data/chap11.htm (3723 words)

	Finding Memory Leaks Using JDeveloper's Debugger
		Memory leaks in Java applications can sometimes be tricky to detect and diagnose.
		This tip describes a specific memory leak I encountered in JDeveloper's own code prior to the 10g preview release, and how JDeveloper's debugger came to my aid to find those stray references.
		With the remote debugger running, I paused execution while Oracle SCM was the active version control system.
	www.oracle.com /technology/products/jdev/tips/duff/debugger_memoryleaks3.html (787 words)

	Memory Leak Detection in C++ \| Linux Journal
		As with most memory allocation debuggers, the standard allocation functions are replaced with new ones that perform various checks as memory is used.
		YAMD (yet another memory debugger) is another package for trapping the boundaries of allocated blocks of memory.
		Valgrind can detect uninitialized memory, memory leaks, passing of uninitialized or unaddressable memory, some misuse of POSIX threads and mismatched use of malloc/free and new/delete actions.
	www.linuxjournal.com /article.php?sid=6556 (2237 words)

	JX Application Framework: Memory Management and Leak Detection
		Since C++ does not have garbage collection, one is required to release every piece of dynamically allocated memory as soon as one is finished with it.
		Each block of memory that was not deallocated will be reported, along with the source file name and line number where it was allocated.
		With this information, all you have to do is figure out where each block of memory ought to be deallocated.
	www.newplanetsoftware.com /jx/memory_manager.php (246 words)

	EPI - JEENI FAQs about Problems Running
		You are using version 2.50 of the debugger on a program built with version 2.50 (or earlier) of the compilation tools.
		Whenever a requested memory transfer began on an address that was a multiple of 4 and the requested number of bytes was also a multiple of 4, the transfer would use only 32-bit operations.
		The LDM reads memory in a burst that has a different timing than the standard LDR instruction that is used to read a single word.
	www.epitools.com /support/jeeni_running.php (2281 words)

	Valgrind Home
		With the tools that come with Valgrind, you can automatically detect many memory management and threading bugs, avoiding hours of frustrating bug-hunting, making your programs more stable.
		You can also perform detailed profiling, to speed up and reduce memory use of your programs.
		The Valgrind distribution currently includes three tools: a memory error detectors, a cache (time) profiler and a heap (space) profiler.
	valgrind.org (127 words)

	Breakpoints do not work as expected
		In these cases, the debugger may associate the debug information for a source file with the wrong copy of its binary code in memory, and the breakpoint subsequently fails.
		What can happen is that the debugger will load the symbolic information for the DLL specified to it at run time (with the /L command line option for CodeView for Windows, or in the "Additional DLLs" field in the IDE debugger), but Windows has actually loaded a different copy of the DLL itself into memory.
		Because there is no way to force the debugger to load a specific DLL (as opposed to loading symbolic information for one with the /L switch), it is a good idea to keep only one version of a DLL at a time in your path, current directory, and Windows directory.
	support.microsoft.com /kb/121556/en-us (2087 words)

	JProbe Memory Debugger - Reduce memory consumption
		We have added a wealth of new features to JProbe Memory Debugger 5.0, all with an eye to reducing the amount of time you spend looking for memory leaks.
		Memory performance investigators can now set a threshold on a class to automatically notify them if the number of instances is excessive.
		JProbe Memory Debugger is also available as part of the JProbe Suite.
	hallogram.com /jprobemembug (457 words)

	Bitmap Memory Debugger
		Bitmap Memory Debugger is a tool used to help windows developers debug code by showing memory in a 2d graphical manner.
		The application is picked by window name and the process ID is reacquired on each refresh, so stopping and restarting the debugged application does not cause BMD to lose which application is being debugged (as long as it's window title remains consistent).
		Bitmap Memory Debugger is free to use for educational, non-commercial or non profit purposes.
	www.theycamefromhollywood.com /bmd (1910 words)

	JTAG Debugging with Caches Enabled
		If this location is in the data cache and has not yet been written out to actual memory, the debugger will get the wrong data when it reads the actual memory location for the variable.
		Similarly, the way that is most frequently used to set a software breakpoint is to modify the memory at the code location where the breakpoint is to be set.
		So it is the responsibility of the host-side debugger to ensure the consistency between the caches and actual memory.
	www.ddci.com /art_10150.shtml (820 words)

	Nicholas Nethercote: Software (Site not responding. Last check: 2007-10-07)
		My main contribution has been the design and implementation of its modular architecture, which generalised Valgrind from a memory debugger into a framework for building tools such as memory debuggers.
		For each memory access, it shows whether it reads, writes or modifies memory, and the data address and data size involved.
		If a pointer is used to access memory outside of its assigned block, a warning is given.
	www.cs.utexas.edu /~njn/software.html (717 words)

	C programming memory management / allocation debugger (Site not responding. Last check: 2007-10-07)
		These files create a memory management debugger that map the standard C memory allocation and free routines (malloc(), calloc(), realloc(), free()) to equivalent routines that do additional error checking and bookkeeping.
		It is useful only for debugging purposes, and intercepts only the main memory allocation routines in C. It is not thread safe, and is not particularly efficient.
		There is some overlap between the capabilities of efence and this debugger, but in general they address different problems.
	www.cirl.uoregon.edu /clements/memoryManager.html (272 words)

	Denali Software, Inc.
		The Denali Memory Modeler will be integrated with the Cadence Affirma SimVision environment, which is the graphical user interface to the Cadence logic simulators.
		Memory modeling and verification tools and their integration with popular system design and verification tools are important needs that Denali is serving," noted EDA analyst, Rita Glover of EDA Today, L.C. (Phoenix, AZ).
		SOMA uniquely and completely captures the functionality and timing of the memory flow and is used by leading memory developers worldwide.
	www.denali.com /news_pr052699.html (777 words)

	Memory (Site not responding. Last check: 2007-10-07)
		Often, a good memory is seen as something that comes naturally and a bad memory as something that cannot be changed.
		The Scripture Memory Connection Dedicated to the support and encouragement of Christians who wish to memorize portions of the Bible.
		At In Loving Memory, you can submit the information of someone you have lost, and have a free memorial plaque created in their memory.
	memory.sitesbest.com (864 words)

	Bugslayer, MSJ, June 1998
		If you use the memory window to look at one of your link list nodes and the next pointer is shown as 0x12345678, it will be displayed in byte format as 0x78 0x56 0x34 0x12.
		The default format for the Memory window shows everything in byte format, which gets a little tedious when you're looking for values that are multiple bytes because you have to do all the Endian conversions in your head.
		After a little work in the debugger and looking at your cheat file, you will become about 70 percent accurate at guessing if a value on the stack is an address or data.
	www.microsoft.com /msj/0698/bugslayer0698.aspx (4891 words)

	FAQ document 18 (Site not responding. Last check: 2007-10-07)
		A: There is an environment variable, DPMIMEM, that effects the amount of memory the debugger takes.
		A: The debugger uses the _cursor_, not the execution arrow, as the starting point for its search for the symbol.
		It is VCPI compiliant and will work with any memory managers that provide VCPI support, as long as they are set up to provide EMS.
	community.borland.com /article/0,1410,18120,0.html (909 words)

	Tool Report: JProbe
		JProbe Memory Debugger also helps you improving application performance by identifying which objects are holding references to other objects in the heap, and calculating the size of memory leaks.
		Additionally, while working with JProbe Memory Debugger in real-time, you can be alerted if object counts exceed a user-definable threshold at the end of a use case.
		Once we end the use case in JProbe Memory Debugger, a snapshot of the session data is captured.
	www.javaperformancetuning.com /tools/jprobe/index.shtml (4091 words)

	Visual C++ debugger reports memory leaks after a ROSE application exits. (Site not responding. Last check: 2007-10-07)
		Visual C++ debugger reports memory leaks after a ROSE application exits.
		I get a lot of memory leak warnings when finishing a debugging session of ROSE applications.
		What you are noticing is the normal memory allocation for schemas, index tables and other system "housekeeping" things.
	www.steptools.com /support/kb/articles/0041.htm (144 words)

	VitoPlantamura.com ..:: web archives ::.. (Site not responding. Last check: 2007-10-07)
		This simple driver (compared to the debugger driver itself), when started, hooks and patches some DirectDraw API entry points in order to be notified about the current video display mode and the start in kernel protected memory of the display framebuffer.
		As a proof of what stated above, you can see the debugger response when entering a wrong syntaxed command: the debugger tries to compile the command "evalf complex_macro (s)", but the compiler is unable to understand the meaning of the "s" symbol.
		A "breakpoint on memory access" was set on the address of the PCR structure in virtual memory.
	www.vitoplantamura.com /index.aspx?page=bugchecker (1408 words)

	LWN: Valgrind memory debugger 1.0.0
		This will give you some assurance that your code is free of a broad class of memory management errors.
		Memory leaks involving lost pointers to malloced blocks.
		Valgrind is an outstanding tool, and very worthy of mention since many projects need a good memory debugger.
	lwn.net /Articles/6105 (477 words)

	TurboDebug-SOCMEMORY (Site not responding. Last check: 2007-10-07)
		The TurboDebug-SOC/Memory., an embedded memory BIST debugger, is a member SynTest's TurboDebug product family for Design for Debug/Diagnosis (DFD) that offers tools and systems for debugging Systems-on-Chips (SOCs) and system boards.
		Each BISTed memory is connected to the boundary scan Test Access Port (TAP) through the TAP controller.
		When a fault is detected, the memory BIST controller automatically shifts out the error pattern for debugging or diagnosis, before it resumes operation.
	www.syntest.com /TurboDebug-SOCMEMORY.htm (314 words)

	[No title] (Site not responding. Last check: 2007-10-07)
		Besides executing \f2command\f1, memdb starts the.BR gcmonitor (1) and a web-browser that automatically connects to the running gcmonitor (by default, the web-browser is set to netscape).
		To communicate between the programs an the gcmonitor, the Memory Debugger creates a monitor file (gcXXXX.mon) for every process.
		Since the communication between the program and the gcmonitor takes place using shared memory, it is recommended to put the monitor files in a local disk.
	www.ictp.trieste.it /~manuals/SUNWSPRO/man/man1/memdb.1 (458 words)

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