Control: tags -1 upstream Control: forwarded -1 https://sourceware.org/bugzilla/show_bug.cgi?id=32156
On 2024-09-09 11:42:43 +0200, Bernhard Übelacker wrote: [...] > In Bookworm and Trixie [3] the function mcheck always returns -1, > because "IS_IN (libc)" seems to be true at compile time. > > Reading the upstream commit comment [4] it looks like mcheck should > just work when using libc_malloc_debug.so. > > And indeed following also prints 0 in Trixie: > LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libc_malloc_debug.so.0 ./mcheck-test [...] Thanks. I've just reported the bug upstream. In short: Returning -1 is incorrect as it can introduce an error, while not preloading libc_malloc_debug is not an error (this just means that one does not wish to check memory). Returning 0 would be OK, since when one does not check memory, mcheck() is never called too late (as its call should not have any consequence). -- Vincent Lefèvre <vinc...@vinc17.net> - Web: <https://www.vinc17.net/> 100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/> Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
