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| // RUN: %clang_tsan -fno-sanitize=thread -shared -fPIC -O1 -DBUILD_SO=1 %s -o \
// RUN: %t.so && \
// RUN: %clang_tsan -O1 %s %t.so -o %t && %run %t 2>&1 | FileCheck %s
// RUN: llvm-objdump -t %t | FileCheck %s --check-prefix=CHECK-DUMP
// CHECK-DUMP: {{[.]preinit_array.*__local_tsan_preinit}}
// SANITIZER_CAN_USE_PREINIT_ARRAY is undefined on android.
// UNSUPPORTED: android
// Test checks if __tsan_init is called from .preinit_array.
// Without initialization from .preinit_array, __tsan_init will be called from
// constructors of the binary which are called after constructors of shared
// library.
#include <stdio.h>
#if BUILD_SO
// "volatile" is needed to avoid compiler optimize-out constructors.
volatile int counter = 0;
volatile int lib_constructor_call = 0;
volatile int tsan_init_call = 0;
__attribute__ ((constructor))
void LibConstructor() {
lib_constructor_call = ++counter;
};
#else // BUILD_SO
extern int counter;
extern int lib_constructor_call;
extern int tsan_init_call;
volatile int bin_constructor_call = 0;
__attribute__ ((constructor))
void BinConstructor() {
bin_constructor_call = ++counter;
};
namespace __tsan {
void OnInitialize() {
tsan_init_call = ++counter;
}
}
int main() {
// CHECK: TSAN_INIT 1
// CHECK: LIB_CONSTRUCTOR 2
// CHECK: BIN_CONSTRUCTOR 3
printf("TSAN_INIT %d\n", tsan_init_call);
printf("LIB_CONSTRUCTOR %d\n", lib_constructor_call);
printf("BIN_CONSTRUCTOR %d\n", bin_constructor_call);
return 0;
}
#endif // BUILD_SO
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