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Cannot Set Up Thread Local Storage

Confirm that it doesn't work with seccomp disabled. Also see below, where a more specific set of symptoms is described. If you forget for any of them, the i386 build seems to contaminate the UML build. The first mechanism is a set of kernel32 APIs (comprising TlsGetValue, TlsSetValue, TlsAlloc, and TlsFree that allows explicit access to TLS. have a peek here

You can apply the entire patchset, or you can move /lib/tls in the image away, as described above. Edit: Plan A One idea is to use a generation token, or cookie that is read by all threads and written to by the central thread. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. This is more convenient than using the TLS APIs as one doesn't need to go and call a function every time you want to use a per-thread variable.

intptr_t g_cookie = 1; pthread_rwlock_t g_lock; void* thread_proc(void *arg) { intptr_t cookie = (intptr_t)arg; while (keepRunningUntilSomeCondition) { pthread_rwlock_rdlock(&g_lock); if (cookie != g_cookie) { cookie = g_cookie; s_IsAllAboutThatBass = true; } pthread_rwlock_unlock(&g_lock); Before we can look at the implementation of how TLS works on Windows, however, it is necessary to know the documented mechanisms to use it. The workaround is have /tmp be non-NFS directory. If you need to reset your password, click here.


Home | News | Sitemap | FAQ | advertise | OSDir is an Inevitable website. Other OSs I have worked on (for example Stratus VOS) allowed one to declare per-thread static variables (a bit like _declspec(thread)). That and the fact that "program has TLS callbacks" pretty much sticks out as a red flag, as it is very rare that most programs would ever need to use them. As well, if I enable highmem, it won't compile, so I can't test that.

Thank you. Any other panic, hang, or strange behavior If you're seeing truly strange behavior, such as hangs or panics that happen in random places, or you try running the debugger to see If one is found, only then will the TLS "magic" happen. https://lists.linuxcontainers.org/pipermail/lxc-users/2014-January/006013.html When you find a machine that takes the packets in, but does not send them onward, that's the culprit.

The usage of the functions is fairly straightforward; TlsAlloc reserves space on all threads for a pointer-sized variable, and TlsGetValue can be used to read this per-thread storage on any thread More specifically, you can't assume that two calls to a work item routine will originate from the same thread pool thread, so you can't store persisted information across work item requests Please visit this page to clear all LQ-related cookies. I do tend to keep 'important' unreplaceable data, like digital camera images, backed up to several sources.

Now, any thread can flip this bool willy nilly as they deem fit. It's very hard to guarantee. If you'd like to contribute content, let us know. furthermore: http://marc.theaimsgroup.com/?l=user-mode-linux-devel&m=107449893709134&w=2 do see that right, there is a patch which could users probably keep away from hitting that bug ?

Then, move your UML pool someplace else and build it there. Note that registered members see fewer ads, and ContentLink is completely disabled once you log in. This is, however, not all that useful as an anti-debug mechanism; at the simplest, one could just attach after that point and not at the start of the program. That register was always semi-mysterious to me, but this article has made it very clear, thanks.

Perhaps I should post my .config? It is safer to just avoid TLS entirely in work routines.) Russell: Yes, although things change a bit in Vista (I've got a planned post to talk about how things have Typically, what happens is that one CPU register is thread-specific, it's set to point to different memory addresses, and all TLS variables are accessed as relative addresses. http://culturahq.com/cannot-set/cannot-set-non-local-hook.html isn`t that the NPTL problem ?

See this page for the details on getting UML to run on your host. If it is not in the man pages or the how-to's this is the place! Introduction to Linux - A Hands on Guide This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started

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you have a buggy gcc. Eli PS. What's the prblem? Notebook IBM T42, original installation ArchLinux, / on hda2 otherwise hda1 swap, hda3 /home, hda4 is the NTFS partition.

sourceforge wouldn't let me subscribe with my normal address, siting some outdated RFC about how your supposed to have a postmaster@ address so spammers know where to send there junk, then Any Ideas? Yep, that is the thing to backup, not your data ;-) regards Arun 14-11-2007, 07:10 AM #4 ray Guest Posts: n/a Re: chroot "Cannot set up thread-local storage I really want to recover the Linux > installation (OK I have data backed up, but the system was well > used and stable). > > Arun I would suggest doing

On non-x86 and non-x64 architectures, the underlying mechanism by which the TEB is accessed varies, but the general theme is that there is a register of some sort which is always At any rate, with or without -O1 or -O2, it still registers 28M. Occasionally, we hear from someone who can reach some machines, but not others on the same net, or who can reach some ports on other machines, but not others.

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