Re: [Valgrind-users] [Valgrind-developers] tilegx ?
- Original Message - > No sign of any tilegx user or developer activity since something like > one year. > No reply received for question in > https://sourceforge.net/p/valgrind/mailman/message/35566192/ > > Is there any tilegx user or developer still active ? > Should we consider this platform as dead ? > > Philippe Hi Perhaps related to this, the parent company of Tilera, EZchip, was acquired by Mellanox about a year ago: http://www.mellanox.com/page/press_release_item?id=1681 A+ Paul -- Developer Access Program for Intel Xeon Phi Processors Access to Intel Xeon Phi processor-based developer platforms. With one year of Intel Parallel Studio XE. Training and support from Colfax. Order your platform today. http://sdm.link/xeonphi ___ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
Re: [Valgrind-users] Many false positives "Mismatched free() / delete / delete []"
- Original Message -
> On jeudi 22 décembre 2016 06:46:44 CET David Chapman wrote:
> > If this is new valgrind behavior, I wouldn't discount a bug in its
> > code
>
> It certainly looks like one :)
>
> > but the developers (not me) would need to know what the QVBoxLayout
> > constructor is doing. If it's inlined, the call stack might point
> > fingers at the calling function rather than the true offender.
>
> It is not inline, and my call stack is from a non-optimized debug
> build
> anyway.
>
> > Does the QVBoxLayout constructor allocate any memory inside?
>
> Yes but not with new[].
>
> QVBoxLayout::QVBoxLayout(QWidget *parent)
> : QBoxLayout(TopToBottom, parent)
> {
> }
>
> QBoxLayout::QBoxLayout(Direction dir, QWidget *parent)
> : QLayout(*new QBoxLayoutPrivate, 0, parent)
> {
> d->dir = dir;
> }
It doesn't much look like it, but there could be calls to new [] in the
QBoxLayoutPrivate ctor, or its parent classes.
Do you know if global new/delete are replaced, or if there are any class
overloads?
A+
Paul
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Re: [Valgrind-users] Insight as to why Valgrind shows memory leak for LAPACKE_dgbsv
- Original Message - > This is the first time I've ever used Intel's MKL LAPACKE and > Valgrind. Unfortunately, I get an error with something I have little > to no experience with. I could use some advice on how to cure a > potential memory leak. I'm using Intel's MKL library, so I highly > assume this issue is my fault, but I'm not exactly sure what to look > for or how to debug the issue. Hi I'm not familiar with LAPACKE. Looking at your Valgrind traces, thay say that you have possible leaks. The most likely cause is that LAPACKE is using a memory manager. I don't know if you need to use LAPACKE_malloc and LAPACKE_free, or whether you need to call some finalization function to free the LAPACKE memory pool. Source code can be instrumented for memory pools (see http://valgrind.org/docs/manual/mc-manual.html#mc-manual.mempools) but I doubt that will be feasible with LAPACKE. A+ Paul -- Transform Data into Opportunity. Accelerate data analysis in your applications with Intel Data Analytics Acceleration Library. Click to learn more. http://pubads.g.doubleclick.net/gampad/clk?id=278785351=/4140 ___ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
Re: [Valgrind-users] Multi threading
- Original Message - > Hi, > > I am running valgrind in order to get a call graph, I am running top > and I keep seeing only one thread 100% cpu working for valgrind. > > Does valgrind have any parameters that I can set for him, so it will > use all my machine cores (16 for example) ? Hi In short, Valgrind serializes threads to run on one core. This questions comes up fairly regularly on this list. Check the archives, there was a recent post with a link to a presentation on what has been done and what would be required to have multithreading in Valgrind. A+ Paul -- Transform Data into Opportunity. Accelerate data analysis in your applications with Intel Data Analytics Acceleration Library. Click to learn more. http://pubads.g.doubleclick.net/gampad/clk?id=278785231=/4140 ___ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
Re: [Valgrind-users] Multi-threading
- Original Message - > Can you give me the link and save me the drilling effort, please ? > > > One more thing, let's assume I continue using this way the valgrind > to create my call graphs. Does a huge memory dedicated for this > purpose, in my case 32gb ram may cause other issues due to the > mentioned serialization process he does ? > > Dor Hi Here is the search page for the archives: https://sourceforge.net/p/valgrind/mailman/search If you search for "multi thread" then you should find a few discussions like "multi threaded valgrind: a first (hacked) prototype for discussions" and "mtV : improve Valgrind to run multiple threads in parallel" The discussion that I was referring to is on the valgrind-developers mailing list, with the subject "Using lock in tool" A+ Paul -- Transform Data into Opportunity. Accelerate data analysis in your applications with Intel Data Analytics Acceleration Library. Click to learn more. http://pubads.g.doubleclick.net/gampad/clk?id=278785231=/4140 ___ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
Re: [Valgrind-users] valgrind it doesn't work with Qt Creator in OS X
- Original Message - > Hi Guys... I'm trying to run valgrind inside Qt Creator as I can make > in Linux but it doesn't work. I have sent an email to the Qt Creator > list and they sent me here to ask... my mail was this: > > > > Valgrinf it doesn’t work on OS X El Capitan: > Hi guys… I’m trying to run Valgrind inside Qt Creator in OS X El > Capitan. I have the last Qt version and when I run the Valgrind > (using Valgrind Memory Analizer or Valgrinf Function Profile) > valgrind remain unfunctional and my progrmam never start… > > > what am i suppose to do ? any idea ?? regards Hi Freddy Does it work outside of Qt Creator? I would recommend that you try to get it running in a console first, and then proceed to Qt Creator. Regards Paul -- Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=272487151=/4140 ___ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
Re: [Valgrind-users] Mismatched free/delete with GCC 4.8.3 std::string
- Original Message - Hi, I've recently switched over to Valgrind 3.10.1 and I'm now see vast numbers of 'mismatched free/delete' type messages all coming from std::string shipped with GCC 4.8.3. I really don't believe what Valgrind is saying but I'd like to be certain. Firstly, has anyone else seen this behaviour recently and secondly what criteria does Valgrind use to determine if a mismatch occurred? Is it possible to print out more information from Valgrind about its decision process? Hi David Could you post an extract of the results? Just to eliminate a few things. The string instance isn't itself newed? I.e, you aren't doing something like std::string* ps = new std::string; ... free(ps); I guess you would have seen this before. You aren't overloading any operator new or delete or using placement new? You're using the default allocator std::allocatorchar? Regards Paul -- ___ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
Re: [Valgrind-users] why valgrind hit __static_initialization_and_destruction_0(int, int)
- Original Message - Hi All, Can anyone tell me why valgrind hit “__static_initialization_and_destruction_0(int, int) ? My guess is that you have one of the forms of static (file static, class static or function static). How to resolved I ? Normally objects that were statically constructed get destroyed in reverse order upon program termination. My guess is that you are allocating something in your constructor that is not deleted in the destructor. A+ Paul -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
Re: [Valgrind-users] Who's doing valgrind on Solaris?
- Original Message - Skip Montanaro skip at pobox.com writes: Who is doing the Solaris port? There is some work-in-progress. Check http://bitbucket.org/setupji/valgrind-solaris Hi Here's the associated thesis https://www.google.com/url?sa=trct=jq=esrc=ssource=webcd=4cad=rjaved=0CE4QFjADurl=https%3A%2F%2Fdip.felk.cvut.cz%2Fbrowse%2Fpdfcache%2Fpavlupe1_2012dipl.pdfei=EN3CUa-yF9Oy4AP-4YGwBwusg=AFQjCNFrhP9odrMtVhtWhpi1ZnRfH5w7Xwsig2=dOdgBgmpoEGyd_GE9XS8JAbvm=bv.48175248,d.dmg A+ Paul -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
Re: [Valgrind-users] Basic Doubt
- Original Message - Hi , Apologies if it is silly question as i am a beginner. Is it possible to use the memcheck tool for code rather than executable ( binary) ? Hi No, Valgrind is strictly runtime. Google for static analysis tools. A+ Paul -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
Re: [Valgrind-users] Fwd: Basic Doubt
- Original Message - Hi , Is it only useful for standalone application? Does it support any other OS than Linux? Hi It's best with an application compiled with debug information. Other OSes - Mac OS X, Free BSD and Solaris that I've used with varying degrees of success. A+ Paul -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
Re: [Valgrind-users] multiple cores being used?
- Original Message - Hi all - I've been using valgrind for a long time. I just upgraded to 3.81, and I see my %CPU in top at close to 1000. I think I've only ever seen 100 or less before. One difference is that this time I used --enable-tls. Does this actually allow threads to work concurrently? Hi Usually when I see excessive loads like that, the cause is swapping rather than a normal user load. Are you well within your RAM+swap limits? A+ Paul -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
Re: [Valgrind-users] Visualizing memory traces using valgrind
- Original Message - Slow down / pause is something that's planned. Rewind is difficult since this would require actually logging the trace data (currently it's transient), which would take up a huge amount of space - though this may be useful for short-lived programs. Hi Is it possible to turn logging on and off (either internally or externally)? Would it be possible to detect patterns of activity (e.g. from loops) and store only the X most common patterns? A+ Paul -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
Re: [Valgrind-users] Problems with callgrind (UNCLASSIFIED)
- Original Message - Classification: UNCLASSIFIED Caveats: NONE When I execute the following command... valgrind --tool=callgrind program arguments I receive the following: valgrind: filed to start tool 'callgrind' for platform 'x86-linux': No such file or directory What could be causing this? Hi You are probably running on an amd64 platform (with amd64 Valgrind) but trying to test an x86 application (32bit). You can probably build/install x86 Valgrind, though that might bring in a lot of dependencies. Alternatively, try to build your app under test as 64bit. A+ Paul -- Own the Future-Intelreg; Level Up Game Demo Contest 2013 Rise to greatness in Intel's independent game demo contest. Compete for recognition, cash, and the chance to get your game on Steam. $5K grand prize plus 10 genre and skill prizes. Submit your demo by 6/6/13. http://p.sf.net/sfu/intel_levelupd2d ___ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
Re: [Valgrind-users] Floating point DATA CORRUPTION with 80bit long long double!! (Re: floating point print error in ada)
- Original Message - [snip] I'll start with a few general comments. I've been working on engineering software for most of my career, and with very few exceptions, double precision is perfectly adequate (and the fastest). The real world (at least, the Intel/AMD part of it) is somewhat complicated by there being two floating point coprocessors, the venerable x87 and SSE. By default, 32bit compiles use x87 and 64bit compiles use SSE. SSE is fairly straightforward: if you use doubles, all calculations are done at 64bit precision. x87 uses 80bit for internal calculations and converts the final result to 64bit. GCC does have an option, -ffloat-store, that inhibits this behaviour (and decent performance!). But there is more. You can compile in mixed x87/sse (though I've found this to be somewhat error prone if you also play with the floating point control and status flags). Lastly, if you do compile with sse on 32bit, by default you will link with the x87 based libm part of the standard C library. Again, GCC has an option to link with an sse version of libm, -msselibm. What is the upshot of all this? If you compile on both 32bit and 64bit platforms without changing the default options, you will get different results. Now, let Valgrind enter the picture. All calculations are done at 64bit, so there should be little or no change on 64bit platforms using sse. However, 32bit platforms using x87 will probably change to give the same results obtained with 64bit and sse. Uh. The impact here is DATA CORRUPTION, caused by doing calculations to be meant using 80bit datatypes being done with 64bit datatypes and the remaining bits filled with garbage. If this can't be solved or is not going to be solved then valgrind should ABORT instead of causing a silent corruption of data. Is this really true? I would expect that Valgrind does all calculations at 64bit double precision and converts. This will result in truncation and/or under/overflow. My feeling is that unless the usually small numerical differences change your control flow, then just ignore the differences. The aim of testing with Valgrind isn't to validate numerical results, it is to validate memory use or performance or threading. A+ Paul -- Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester Wave(TM): Endpoint Security, Q1 2013 and remains a good choice in the endpoint security space. For insight on selecting the right partner to tackle endpoint security challenges, access the full report. http://p.sf.net/sfu/symantec-dev2dev ___ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
Re: [Valgrind-users] Floating point DATA CORRUPTION with 80bit long long double!! (Re: floating point print error in ada)
- Original Message - Unfortunately the assessment that there are only small changes or unimportant differences is plain wrong. In complex calculations (i.e. no one line hello sin() world demo apps) which rely on the wider datatypes the lack of precision will cause major malfunctions and render the applications defunct. There are enough examples for this kind of problems (and enough complains about valgrind in the NIH lists). Hi There are two issues here. Emulation of long double and exact emulation of x87 double. Adding the first of those to Valgrind seems reasonable to me, but I would be most put out if Valgrind were made much slower by adding exact x87 emulation. Other than the 2 cases that you cite, can you name any other major uses of long double? As a somewhat non-scientific measure, I used google to search for 'double C++ -long double' and it had about 13 million hits [that's a search for double and C++ exclusing long double]. I then searched for 'long double C++' and had about 300 thousand hits. I for one do not accept your assertion that most scientific and engineering software is written using long double precision. And to be a bit more precise 64bit double has 53bits of precision, or about 1.1e-16 ULP 80bit floating point has 64bits, or about 5.4e-20 ULP I've run many thousands of electronic circuit simulations (hardly a demo app; there is a small amount of code using long double) under Valgrind and my observation is that over 90% have no detectable difference, around 10% have insignificant differences and a handful have major differences. A+ Paul -- Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester Wave(TM): Endpoint Security, Q1 2013 and remains a good choice in the endpoint security space. For insight on selecting the right partner to tackle endpoint security challenges, access the full report. http://p.sf.net/sfu/symantec-dev2dev ___ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
Re: [Valgrind-users] Valgrind suppression
- Original Message - When I use --gen-suppression and --suppression both at the same time my application fails to start. Individually these flags works fine. Hi Does Valgrind generate any output? If so, could you post that. A+ Paul -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb ___ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
Re: [Valgrind-users] stack trace line numbers truncated due to verbose argument types
- Original Message -
Hello,
However, I really want the line number of my function that the error
is occurring in, but I can't find it.
$ valgrind --tool=memcheck --trace-children=yes ./myApp
(myApp top secret output omitted)
[snip]
Unfortunately, on that last line starting with by 0x7EED1D, the
line
appears to be truncated before the line number in the file is
specified.
Is there a way to increase the buffer or whatever so that this line
is
not truncated?
Hi
Usually when there is a limit, there's a way to change the limit. I think that
it's here
static void printIpDesc(UInt n, Addr ip, void* uu_opaque)
{
#define BUF_LEN 4096
static UChar buf[BUF_LEN];
in
coregrind/m_stacktrace.c
Download the Valgrind source, modify BUF_LEN to something larger, build
Valgrind and see if it works.
A+
Paul
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Re: [Valgrind-users] Errors in strncasecmp
- Original Message - On Sunday, June 03, 2012, Paul Floyd wrote: I'll try adding it and confirm either tonight or tomorrow. Please do. Hi Just done the test, and the problem is fixed. A+ Paul -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
Re: [Valgrind-users] Massif: some --ignore-fn options are not respected
- Original Message - Dear Valgrind community, I am currently trying to use massif on a huge programming project, and I want to isolate some allocations that aren't significant. I use the --ignore-fn option like this: valgrind --tool=massif --ignore-fn=SDL_CreateRGBSurface --ignore-fn='CCircletechString::DebugUpdateL()' --ignore-fn='CSDLUtil::CreateFontTextureBuffer(MShineFont,unsigned int,unsigned int)' (etc etc etc) ./a.out Hi Have you tried using the mangled C++ name? Normally I use nm to find the mangled names. with and without -C. A+ Paul -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
Re: [Valgrind-users] Can more than 1 Valgrind tool be run at once?
- Original Message - I have a good amount of Linux and programming experience (~10 years) but am new to the valgrind tool. Thus far I really like the information and capabilities, impressive. I'm profiling a multi-component embedded system on Ubuntu. The components are in multiple languages (c++, java, javascript tied in using lein and cmake), thus I chose Valgrind (also using perf and YourKit to qualify the valgrind results). I am wondering, will Valgrind work properly if I run it with more than 1 tool when executed? For example: valgrind --tool=callgrind --callgrind-out-file=calls.data --tool=massif --massif-output-file=heap.data ./program.out I get the feeling that since each tool is fairly taxing on the system the answer is going to be a resounding no - just wanted to ask. Also was wondering if anyone has used the iogrind tool for Valgrind on a multi-threaded application with any success. Hi [reply to the list this time] I run a functional test suite using memcheck over the weekend on an 8 core machine with 6 in parallel. As long as you don't drive the machine into swap then I don't think that there should be a problem. A+ Paul -- All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-novd2d ___ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
Re: [Valgrind-users] VG_N_SEGMENTS is too low error
Hi To fix this you will have to build your own Valgrind (if you haven't done so already). Grep for VG_N_SEGMENTS in the source, change it to something bigger and rebuild/reinstall. A+ Paul - Original Message - From: Luka Napotnik luka.napot...@gmail.com To: valgrind-users@lists.sourceforge.net Sent: Thursday, 7 July, 2011 09:28:53 GMT +01:00 Amsterdam / Berlin / Bern / Rome / Stockholm / Vienna Subject: [Valgrind-users] VG_N_SEGMENTS is too low error Hello. I'm running my program under valgrind (3.6.1) and after some time I get the following message and valgrind aborts: --30322:0:aspacem Valgrind: FATAL: VG_N_SEGMENTS is too low. --30322:0:aspacemIncrease it and rebuild. Exiting now. Now what could cause such an error? My program can create/destroy threads very quickly. I assume there's something strange with the stack? Any hints why valgrind would complain in such a way? Greets, Luka -- All of the data generated in your IT infrastructure is seriously valuable. Why? It contains a definitive record of application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-d2d-c2 ___ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users -- All of the data generated in your IT infrastructure is seriously valuable. Why? It contains a definitive record of application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-d2d-c2 ___ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
