On 5/22/14, Julian Seward wrote: > > That soname looks ok, then. But from the log you posted > later, it is clear that there is no malloc intercepting happening. > > For malloc intercepting to work, the files vgpreload_core-arm-linux.so > and vgpreload_memcheck-amd64-linux.so need to be loaded into the process. > > Comparing your log with a run with a glibc based system, I see this > > Reading syms from [..]/vgpreload_core-amd64-linux.so > Reading syms from [..]/vgpreload_memcheck-amd64-linux.so > > which is missing in your log. > > Does uCLibc implement LD_PRELOAD? I think that is how Valgrind causes > those two objects to be loaded into the process. > > J > That may be a clue!
Actually Valgrind sets LD_PRELOAD env variable to correct string, pointing to existing /usr/lib/valgrind/vgpreload_core-arm-linux.so and /usr/lib/valgrind/vgpreload_memcheck-arm-linux.so, but uClibc may have been configured without LD_PRELOAD. I've found this in blog entry from NeoSkye: http://drivingtux.blogspot.com/2013/10/getting-valgrind-memcheck-to-work-with.html He wrote: "It turns out that valgrind actually sets the LD_PRELOAD environment variable early in execution, before loading the executable that is to be analyzed. This should instruct the runtime link loader to load the libraries in LD_PRELOAD, which are the vgpreload ones. Unfortunately, if your uclibc is configured without LD_PRELOAD (like ours was), the loader will ignore LD_PRELOAD and valgrind won't know that the vgpreload libraries were never loaded and malloc was not replaced. tl;dr uclibc must be configured with LD_PRELOAD in order for valgrind's memcheck to work. " Will try to do that. ------------------------------------------------------------------------------ "Accelerate Dev Cycles with Automated Cross-Browser Testing - For FREE Instantly run your Selenium tests across 300+ browser/OS combos. Get unparalleled scalability from the best Selenium testing platform available Simple to use. Nothing to install. Get started now for free." http://p.sf.net/sfu/SauceLabs _______________________________________________ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
