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1 // Test to make sure basic initialization order errors are caught.
2 
3 // RUN: %clangxx_asan -O0 %s %p/Helpers/initialization-bug-extra2.cc -o %t
4 // RUN: env ASAN_OPTIONS=check_initialization_order=true not %run %t 2>&1 | FileCheck %s
5 
6 // Do not test with optimization -- the error may be optimized away.
7 
8 // FIXME: https://code.google.com/p/address-sanitizer/issues/detail?id=186
9 // XFAIL: darwin
10 
11 #include <cstdio>
12 
13 // The structure of the test is:
14 // "x", "y", "z" are dynamically initialized globals.
15 // Value of "x" depends on "y", value of "y" depends on "z".
16 // "x" and "z" are defined in this TU, "y" is defined in another one.
17 // Thus we shoud stably report initialization order fiasco independently of
18 // the translation unit order.
19 
initZ()20 int initZ() {
21   return 5;
22 }
23 int z = initZ();
24 
25 // 'y' is a dynamically initialized global residing in a different TU.  This
26 // dynamic initializer will read the value of 'y' before main starts.  The
27 // result is undefined behavior, which should be caught by initialization order
28 // checking.
29 extern int y;
initX()30 int __attribute__((noinline)) initX() {
31   return y + 1;
32   // CHECK: {{AddressSanitizer: initialization-order-fiasco}}
33   // CHECK: {{READ of size .* at 0x.* thread T0}}
34   // CHECK: {{0x.* is located 0 bytes inside of global variable .*(y|z).*}}
35 }
36 
37 // This initializer begins our initialization order problems.
38 static int x = initX();
39 
main()40 int main() {
41   // ASan should have caused an exit before main runs.
42   printf("PASS\n");
43   // CHECK-NOT: PASS
44   return 0;
45 }
46