blob: c657052e05f003c44c0d0687d257c47146ddb8da (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
// Test that mmap (without MAP_FIXED) always returns valid application addresses.
// RUN: %clangxx_msan -O0 %s -o %t && %run %t
// RUN: %clangxx_msan -O0 -fsanitize-memory-track-origins %s -o %t && %run %t
#include <assert.h>
#include <errno.h>
#include <stdint.h>
#include <sys/mman.h>
#include <stdio.h>
bool AddrIsApp(void *p) {
uintptr_t addr = (uintptr_t)p;
#if defined(__FreeBSD__) && defined(__x86_64__)
return addr < 0x010000000000ULL || addr >= 0x600000000000ULL;
#elif defined(__x86_64__)
return addr >= 0x600000000000ULL;
#elif defined(__mips64)
return addr >= 0x00e000000000ULL;
#endif
}
int main() {
// Large enough to quickly exhaust the entire address space.
#if defined(__mips64)
const size_t kMapSize = 0x100000000ULL;
#else
const size_t kMapSize = 0x1000000000ULL;
#endif
int success_count = 0;
while (true) {
void *p = mmap(0, kMapSize, PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
printf("%p\n", p);
if (p == MAP_FAILED) {
assert(errno == ENOMEM);
break;
}
assert(AddrIsApp(p));
success_count++;
}
printf("successful mappings: %d\n", success_count);
assert(success_count > 5);
}
|
