1// RUN: %clang_tsan -fno-sanitize=thread -shared -fPIC -O1 -DBUILD_SO=1 %s -o \
2// RUN: %t.so && \
3// RUN: %clang_tsan -O1 %s %t.so -o %t && %run %t 2>&1 | FileCheck %s
4// RUN: llvm-objdump -t %t | FileCheck %s --check-prefix=CHECK-DUMP
5// CHECK-DUMP: {{[.]preinit_array.*__local_tsan_preinit}}
6
7// SANITIZER_CAN_USE_PREINIT_ARRAY is undefined on android.
8// UNSUPPORTED: android
9
10// Test checks if __tsan_init is called from .preinit_array.
11// Without initialization from .preinit_array, __tsan_init will be called from
12// constructors of the binary which are called after constructors of shared
13// library.
14
15#include <stdio.h>
16
17#if BUILD_SO
18
19// "volatile" is needed to avoid compiler optimize-out constructors.
20volatile int counter = 0;
21volatile int lib_constructor_call = 0;
22volatile int tsan_init_call = 0;
23
24__attribute__ ((constructor))
25void LibConstructor() {
26 lib_constructor_call = ++counter;
27};
28
29#else // BUILD_SO
30
31extern int counter;
32extern int lib_constructor_call;
33extern int tsan_init_call;
34
35volatile int bin_constructor_call = 0;
36
37__attribute__ ((constructor))
38void BinConstructor() {
39 bin_constructor_call = ++counter;
40};
41
42namespace __tsan {
43
44void OnInitialize() {
45 tsan_init_call = ++counter;
46}
47
48}
49
50int main() {
51 // CHECK: TSAN_INIT 1
52 // CHECK: LIB_CONSTRUCTOR 2
53 // CHECK: BIN_CONSTRUCTOR 3
54 printf("TSAN_INIT %d\n", tsan_init_call);
55 printf("LIB_CONSTRUCTOR %d\n", lib_constructor_call);
56 printf("BIN_CONSTRUCTOR %d\n", bin_constructor_call);
57 return 0;
58}
59
60#endif // BUILD_SO
61