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// RUN: %clangxx_tsan %s -shared -DSHARED_LIB \
// RUN: -o %t-lib-instrumented.dylib \
// RUN: -install_name @rpath/`basename %t-lib-instrumented.dylib`
// RUN: %clangxx_tsan %s -shared -DSHARED_LIB -fno-sanitize=thread \
// RUN: -o %t-lib-noninstrumented.dylib \
// RUN: -install_name @rpath/`basename %t-lib-noninstrumented.dylib`
// RUN: %clangxx_tsan %s -shared -DSHARED_LIB -fno-sanitize=thread -DUSE_TSAN_CALLBACKS \
// RUN: -o %t-lib-noninstrumented-callbacks.dylib \
// RUN: -install_name @rpath/`basename %t-lib-noninstrumented-callbacks.dylib`
// RUN: %clangxx_tsan %s %t-lib-instrumented.dylib -o %t-lib-instrumented
// RUN: %clangxx_tsan %s %t-lib-noninstrumented.dylib -o %t-lib-noninstrumented
// RUN: %clangxx_tsan %s %t-lib-noninstrumented-callbacks.dylib -o %t-lib-noninstrumented-callbacks
// RUN: %deflake %run %t-lib-instrumented 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK --check-prefix=TEST1
// RUN: %run %t-lib-noninstrumented 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK --check-prefix=TEST2
// RUN: %deflake %run %t-lib-noninstrumented-callbacks 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECK --check-prefix=TEST3
#include <thread>
#include <dlfcn.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
struct MyObject;
typedef MyObject *MyObjectRef;
extern "C" {
void InitializeLibrary();
MyObject *ObjectCreate();
long ObjectRead(MyObject *);
void ObjectWrite(MyObject *, long);
void ObjectWriteAnother(MyObject *, long);
}
#if defined(SHARED_LIB)
struct MyObject {
long _val;
long _another;
};
#if defined(USE_TSAN_CALLBACKS)
static void *tag;
void *(*callback_register_tag)(const char *object_type);
void *(*callback_assign_tag)(void *addr, void *tag);
void (*callback_read)(void *addr, void *caller_pc, void *tag);
void (*callback_write)(void *addr, void *caller_pc, void *tag);
#endif
void InitializeLibrary() {
#if defined(USE_TSAN_CALLBACKS)
callback_register_tag = (decltype(callback_register_tag))dlsym(RTLD_DEFAULT, "__tsan_external_register_tag");
callback_assign_tag = (decltype(callback_assign_tag))dlsym(RTLD_DEFAULT, "__tsan_external_assign_tag");
callback_read = (decltype(callback_read))dlsym(RTLD_DEFAULT, "__tsan_external_read");
callback_write = (decltype(callback_write))dlsym(RTLD_DEFAULT, "__tsan_external_write");
tag = callback_register_tag("MyLibrary::MyObject");
#endif
}
MyObject *ObjectCreate() {
MyObject *ref = (MyObject *)malloc(sizeof(MyObject));
#if defined(USE_TSAN_CALLBACKS)
callback_assign_tag(ref, tag);
#endif
return ref;
}
long ObjectRead(MyObject *ref) {
#if defined(USE_TSAN_CALLBACKS)
callback_read(ref, __builtin_return_address(0), tag);
#endif
return ref->_val;
}
void ObjectWrite(MyObject *ref, long val) {
#if defined(USE_TSAN_CALLBACKS)
callback_write(ref, __builtin_return_address(0), tag);
#endif
ref->_val = val;
}
void ObjectWriteAnother(MyObject *ref, long val) {
#if defined(USE_TSAN_CALLBACKS)
callback_write(ref, __builtin_return_address(0), tag);
#endif
ref->_another = val;
}
#else // defined(SHARED_LIB)
int main(int argc, char *argv[]) {
InitializeLibrary();
{
MyObjectRef ref = ObjectCreate();
std::thread t1([ref]{ ObjectRead(ref); });
std::thread t2([ref]{ ObjectRead(ref); });
t1.join();
t2.join();
}
// CHECK-NOT: WARNING: ThreadSanitizer
fprintf(stderr, "RR test done\n");
// CHECK: RR test done
{
MyObjectRef ref = ObjectCreate();
std::thread t1([ref]{ ObjectRead(ref); });
std::thread t2([ref]{ ObjectWrite(ref, 66); });
t1.join();
t2.join();
}
// TEST1: WARNING: ThreadSanitizer: data race
// TEST1: {{Write|Read}} of size 8 at
// TEST1: Previous {{write|read}} of size 8 at
// TEST1: Location is heap block of size 16 at
// TEST2-NOT: WARNING: ThreadSanitizer
// TEST3: WARNING: ThreadSanitizer: race on a library object
// TEST3: {{Mutating|read-only}} access of object MyLibrary::MyObject at
// TEST3: {{ObjectWrite|ObjectRead}}
// TEST3: Previous {{mutating|read-only}} access of object MyLibrary::MyObject at
// TEST3: {{ObjectWrite|ObjectRead}}
// TEST3: Location is MyLibrary::MyObject object of size 16 at
// TEST3: {{ObjectCreate}}
fprintf(stderr, "RW test done\n");
// CHECK: RW test done
{
MyObjectRef ref = ObjectCreate();
std::thread t1([ref]{ ObjectWrite(ref, 76); });
std::thread t2([ref]{ ObjectWriteAnother(ref, 77); });
t1.join();
t2.join();
}
// TEST1-NOT: WARNING: ThreadSanitizer: data race
// TEST2-NOT: WARNING: ThreadSanitizer
// TEST3: WARNING: ThreadSanitizer: race on a library object
// TEST3: Mutating access of object MyLibrary::MyObject at
// TEST3: {{ObjectWrite|ObjectWriteAnother}}
// TEST3: Previous mutating access of object MyLibrary::MyObject at
// TEST3: {{ObjectWrite|ObjectWriteAnother}}
// TEST3: Location is MyLibrary::MyObject object of size 16 at
// TEST3: {{ObjectCreate}}
fprintf(stderr, "WW test done\n");
// CHECK: WW test done
}
#endif // defined(SHARED_LIB)
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