- /* Setup a stack for our signal handler.... */
- stack_t ss;
- ss.ss_sp = PageAlignAddressUpward(model_malloc(SIGSTACKSIZE + PAGESIZE - 1));
- ss.ss_size = SIGSTACKSIZE;
- ss.ss_flags = 0;
- sigaltstack(&ss, NULL);
-
- struct sigaction sa;
- sa.sa_flags = SA_SIGINFO | SA_NODEFER | SA_RESTART | SA_ONSTACK;
- sigemptyset(&sa.sa_mask);
- sa.sa_sigaction = HandlePF;
-#ifdef MAC
- if (sigaction(SIGBUS, &sa, NULL) == -1) {
- model_print("SIGACTION CANNOT BE INSTALLED\n");
- exit(EXIT_FAILURE);
- }
-#endif
- if (sigaction(SIGSEGV, &sa, NULL) == -1) {
- model_print("SIGACTION CANNOT BE INSTALLED\n");
- exit(EXIT_FAILURE);
- }
-
- initSnapShotRecord(numbackingpages, numsnapshots, nummemoryregions);
-
- // EVIL HACK: We need to make sure that calls into the HandlePF method don't cause dynamic links
- // The problem is that we end up protecting state in the dynamic linker...
- // Solution is to call our signal handler before we start protecting stuff...
-
- siginfo_t si;
- memset(&si, 0, sizeof(si));
- si.si_addr = ss.ss_sp;
- HandlePF(SIGSEGV, &si, NULL);
- snapshotrecord->lastBackingPage--; //remove the fake page we copied
-
- void *basemySpace = model_malloc((numheappages + 1) * PAGESIZE);
- void *pagealignedbase = PageAlignAddressUpward(basemySpace);
- user_snapshot_space = create_mspace_with_base(pagealignedbase, numheappages * PAGESIZE, 1);
- addMemoryRegionToSnapShot(pagealignedbase, numheappages);
-
- void *base_model_snapshot_space = model_malloc((numheappages + 1) * PAGESIZE);
- pagealignedbase = PageAlignAddressUpward(base_model_snapshot_space);
- model_snapshot_space = create_mspace_with_base(pagealignedbase, numheappages * PAGESIZE, 1);
- addMemoryRegionToSnapShot(pagealignedbase, numheappages);
-
- entryPoint();