Hi! On Sun, Mar 28, 2021 at 2:54 PM Sergei Golubchik <[email protected]> wrote: > > Hi, Michael! > > On Mar 28, Michael Widenius wrote: > > revision-id: 0c37211c2a2 (mariadb-10.5.2-517-g0c37211c2a2) > > parent(s): 555c4470130 > > author: Michael Widenius <[email protected]> > > committer: Michael Widenius <[email protected]> > > timestamp: 2021-03-24 14:31:53 +0200 > > message: > > > > Fixed my_addr_resolve > > > > At least on openSUSE Leap 15.1 one should not use the dli_fbase offset > > provided by dladdr() for addresses in the main program. > > Without this patch the stack traces from sf_report_leaked_memory() > > are not usable. > > This is very strange. First, the whole purpose of this code is to use > dli_fbase offset for the main program. That's why it was added in the > first place. PIE binaries can be loaded at any address in memory and the > address you see with addr2line or nm or readelf is not the same address > you'll see in gdb or in a strack trace. We have to subtract the base > address first. > > But may be openSUSE is different? > So, I built on openSUSE Leap and the stack trace was perfectly usable > without your patch. I tried both `kill -ABRT` and an artificially > introduced memory leak. > > So I suspect there was some misunderstanding and the problem was > somewhere else (I cannot know what, of course, but just as an example - > the build was bad and recompilation fixed it).
This was checked extensively by both me and Vicentiu (both looking at the assembler and the examining the output). Without the patch I get constantly wrong stack traces for the main program. We also tried to find exactly how dli_fbase exactly should be used on the internet, but could not find any good documentation for it. The simple fact is that I am using this patch on my 10.6 tree and stack traces are good with it and has been for several months, so it is impossible that this is related to a bad binary or bad build but something that is required on my system Regards, Monty _______________________________________________ Mailing list: https://launchpad.net/~maria-developers Post to : [email protected] Unsubscribe : https://launchpad.net/~maria-developers More help : https://help.launchpad.net/ListHelp
