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-INIT-ORDER-EXE 4 // RUN: %env_asan_opts=check_initialization_order=true not %run %t-INIT-ORDER-EXE 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,win32 10 11 // The test is expected to fail on OS X Yosemite and older 12 // UNSUPPORTED: osx-no-ld64-live_support 13 14 #include <cstdio> 15 16 // The structure of the test is: 17 // "x", "y", "z" are dynamically initialized globals. 18 // Value of "x" depends on "y", value of "y" depends on "z". 19 // "x" and "z" are defined in this TU, "y" is defined in another one. 20 // Thus we shoud stably report initialization order fiasco independently of 21 // the translation unit order. 22 23 int initZ() { 24 return 5; 25 } 26 int z = initZ(); 27 28 // 'y' is a dynamically initialized global residing in a different TU. This 29 // dynamic initializer will read the value of 'y' before main starts. The 30 // result is undefined behavior, which should be caught by initialization order 31 // checking. 32 extern int y; 33 int __attribute__((noinline)) initX() { 34 return y + 1; 35 // CHECK: {{AddressSanitizer: initialization-order-fiasco}} 36 // CHECK: {{READ of size .* at 0x.* thread T0}} 37 // CHECK: {{0x.* is located 0 bytes inside of global variable .*(y|z).*}} 38 // CHECK: registered at: 39 // CHECK: 0x{{.*}} in __asan_register_globals 40 } 41 42 // This initializer begins our initialization order problems. 43 static int x = initX(); 44 45 int main() { 46 // ASan should have caused an exit before main runs. 47 printf("PASS\n"); 48 // CHECK-NOT: PASS 49 return 0; 50 } 51
