Change Details

XXX This is just a quick hack / demo. It would be nice to have debugging for mismatched malloc types between alloc/free. A simple way is to stash the mtp pointer alongside the malloc memory. This hacks redzone to do that, because it already stashes stuff alongside the malloc memory, has the pointer adjustments for doing so, stores a stack, etc. I am hoping for review of the general idea, and of doing it with redzone or not. Any better way? === Mismatched mtp in malloc/free causes malloc accounting bugs. Enhance redzone so that it stashes a context cookie (the mtp pointer) on alloc and checks it on free. This is a bit of a misuse of redzone(9), but the machinery is already available.

XXX This is just a quick hack / demo. It would be nice to have debugging for mismatched malloc types between alloc/free. A simple way is to stash the mtp pointer alongside the malloc memory. This hacks redzone to do that, because it already stashes stuff alongside the malloc memory, has the pointer adjustments for doing so, stores a stack, etc. I am hoping for review of the general idea, and of doing it with redzone or not. Any better way? --- Mismatched mtp in malloc/free causes malloc accounting bugs. Enhance redzone so that it stashes a context cookie (the mtp pointer) on alloc and checks it on free. This is a bit of a misuse of redzone(9), but the machinery is already available.

XXX This is just a quick hack / demo. It would be nice to have debugging for mismatched malloc types between alloc/free. A simple way is to stash the mtp pointer alongside the malloc memory. This hacks redzone to do that, because it already stashes stuff alongside the malloc memory, has the pointer adjustments for doing so, stores a stack, etc. I am hoping for review of the general idea, and of doing it with redzone or not. Any better way? ===--- Mismatched mtp in malloc/free causes malloc accounting bugs. Enhance redzone so that it stashes a context cookie (the mtp pointer) on alloc and checks it on free. This is a bit of a misuse of redzone(9), but the machinery is already available.