On Thu, Oct 07, 2010 at 12:21:57PM +0200, WAROQUIERS Philippe wrote: > > At work, we encountered 'not enough memory' crashes of our big > application > under valgrind due to the way the superblocks are managed (see bug > http://bugs.kde.org/show_bug.cgi?id=250101 > (there is a proposed patch to solve this bug) > > However, in your case, not being able to even allocate about 20 Mb > ((14.3Mb + 4.2 Mb) looks really strange : > > >==10577== > >==10577== Valgrind's memory management: out of memory: > >==10577== newSuperblock's request for 4194304 bytes failed. > >==10577== 14356480 bytes have already been allocated. > >==10577== Valgrind cannot continue. Sorry. > > > So, it is unclear what is happening. Maybe the best is to enable > the debug traces of valgrind to have more details. > If still not clear, strace of valgrind might give even more details > about the system calls leading to the above failure. > > Philippe >
Should've though strace myself. The problem is
execve("/usr/lib/valgrind/memcheck-amd64-linux", ["/usr/bin/valgrind.bin"], [/*
39 vars */]) = 0
open("/proc/self/maps", O_RDONLY) = 3
read(3, "38000000-381f5000 r-xp 00000000 "..., 100000) = 549
read(3, "", 99451) = 0
close(3) = 0
mmap(0x402001000, 4194304, PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, 0, 0) = -1 EPERM (Operation not permitted)
getpid() = 27233
This is probably due to grsecurity kernel but I am not sure why, it has worked
before on a 32 bit system.
Aki Tuomi
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