On Wed, 2019-03-20 at 00:01 +0100, Yuri D'Elia wrote: > On Tue, Mar 19 2019, Philippe Waroquiers wrote: > > > ==19253== by 0x580A524B: ??? (in > > > /usr/lib/x86_64-linux-gnu/valgrind/memcheck-amd64-linux) > > > ==19253== by 0x580A71EF: ??? (in > > > /usr/lib/x86_64-linux-gnu/valgrind/memcheck-amd64-linux) > > > ==19253== by 0x580F5D80: ??? (in > > > /usr/lib/x86_64-linux-gnu/valgrind/memcheck-amd64-linux) > > > > A 'classically' installed valgrind will give file and linenr in the host > > backtrace/ > > I don't have valgrind debugging symbols currently installed. > > > The easiest is to increase the constants significantly (e.g. * 10) > > and recompile/retest. If after that it works, then it would be nice to > > understand why your application needs so much temporary space. > > (and maybe have an idea of really how much your app needs). > > Could this buffer be made tunable in the future? > I so far always used a pre-compiled version of valgrind. I do not think that this would be particularly difficult, but up to now, the preferred approach was always to just have a big enough fixed size, and increase it when an unexpected set of instructions implies a bigger size.
Note that compiling valgrind from source is quite easy, in particular if you use a release: there is almost no dependencies. Starting from the git repository is only slightly more complex (you need auto tools etc). So, I recommend compiling from sources for a case like this. > > > If that does not solve the problem, then I guess a small reproducer will > > help to investigate ... > > This is not something I wrote, although there's a double-free I wanted > to investigate. It's also not a small program, linking with quite a few > large libraries. > > But it's all fully OSS. I could provide the binaries or a VM with the > executable pre-loaded if somebody is interested in having a look. Easiest thing to try initially is to recompile with a bigger size. Philippe _______________________________________________ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
