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Add PANIC_KERNEL compile-time option #2

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Add PANIC_KERNEL compile-time option #2

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23 changes: 17 additions & 6 deletions zeromaps.c
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Original file line number Diff line number Diff line change
Expand Up @@ -9,12 +9,6 @@
void *thread(void *x) { open("x/blockme", 0); return 0; }

int main() {
pthread_t t;
pthread_create(&t, 0, thread, 0);
sleep(1);

puts("spawned thread");

FILE *mapsfile = fopen("/proc/self/maps", "r");

struct m { long start, end; };
Expand Down Expand Up @@ -72,5 +66,22 @@ void f() {
printf("BTW MY PID IS %d\n", getpid());

puts("start unmapping like crazy");

#ifdef PANIC_KERNEL
/* all forked processes share the same mapped memory */
while (fork() <= 0) { // maximize the effect
#endif

pthread_t t;
pthread_create(&t, 0, thread, 0);
sleep(1);

#ifndef PANIC_KERNEL
puts("spawned thread");
#endif

f();
#ifdef PANIC_KERNEL
}
#endif
}