Why deal with use-after-free crashes when you can just leak memory instead?

noCFRelease.m

//COMPILE:  clang -framework Foundation noCFRelease.m -undefined dynamic_lookup -dynamiclib -o noCFRelease.dylib
//USE:      DYLD_INSERT_LIBRARIES=/path/to/noCFRelease.dylib /path/to/foo.app/Contents/MacOS/foo


#include <CoreFoundation/CoreFoundation.h>

#define DYLD_INTERPOSE(_replacement,_replacee) \
__attribute__((used)) static struct{ const void* replacement; const void* replacee; } _interpose_##_replacee \
__attribute__ ((section ("__DATA,__interpose"))) = { (const void*)(unsigned long)&_replacement, (const void*)(unsigned long)&_replacee };

void noCFRelease (CFTypeRef cf) {
	//😴
}

DYLD_INTERPOSE(noCFRelease, CFRelease);