1 // Test to make sure basic initialization order errors are caught.
2
3 // RUN: %clangxx_asan -m64 -O0 %s %p/Helpers/initialization-bug-extra2.cc -o %t
4 // RUN: ASAN_OPTIONS=check_initialization_order=true %t 2>&1 \
5 // RUN: | %symbolize | FileCheck %s
6 // RUN: %clangxx_asan -m32 -O0 %s %p/Helpers/initialization-bug-extra2.cc -o %t
7 // RUN: ASAN_OPTIONS=check_initialization_order=true %t 2>&1 \
8 // RUN: | %symbolize | FileCheck %s
9
10 // Do not test with optimization -- the error may be optimized away.
11
12 #include <cstdio>
13
14 // The structure of the test is:
15 // "x", "y", "z" are dynamically initialized globals.
16 // Value of "x" depends on "y", value of "y" depends on "z".
17 // "x" and "z" are defined in this TU, "y" is defined in another one.
18 // Thus we shoud stably report initialization order fiasco independently of
19 // the translation unit order.
20
initZ()21 int initZ() {
22 return 5;
23 }
24 int z = initZ();
25
26 // 'y' is a dynamically initialized global residing in a different TU. This
27 // dynamic initializer will read the value of 'y' before main starts. The
28 // result is undefined behavior, which should be caught by initialization order
29 // checking.
30 extern int y;
initX()31 int __attribute__((noinline)) initX() {
32 return y + 1;
33 // CHECK: {{AddressSanitizer: initialization-order-fiasco}}
34 // CHECK: {{READ of size .* at 0x.* thread T0}}
35 // CHECK: {{0x.* is located 0 bytes inside of global variable .*(y|z).*}}
36 }
37
38 // This initializer begins our initialization order problems.
39 static int x = initX();
40
main()41 int main() {
42 // ASan should have caused an exit before main runs.
43 printf("PASS\n");
44 // CHECK-NOT: PASS
45 return 0;
46 }
47