void singletonWarnDestroyInstanceLeak(
const TypeDescriptor& type,
const void* ptr) {
LOG(ERROR) << "Singleton of type " << type.name() << " has a "
<< "living reference at destroyInstances time; beware! Raw "
<< "pointer is " << ptr << ". It is very likely "
<< "that some other singleton is holding a shared_ptr to it. "
<< "This singleton will be leaked (even if a shared_ptr to it "
<< "is eventually released)."
<< "Make sure dependencies between these singletons are "
<< "properly defined.";
}
void singletonPrintDestructionStackTrace(const TypeDescriptor& type) {
std::string output = "Singleton " + type.name() + " was released.\n";
auto stack_trace_getter = SingletonVault::stackTraceGetter().load();
auto stack_trace = stack_trace_getter ? stack_trace_getter() : "";
if (stack_trace.empty()) {
output += "Failed to get release stack trace.";
} else {
output += "Release stack trace:\n";
output += stack_trace;
}
LOG(ERROR) << output;
}
[[noreturn]] void singletonWarnCreateBeforeRegistrationCompleteAndAbort(
const TypeDescriptor& type) {
auto stack_trace_getter = SingletonVault::stackTraceGetter().load();
auto stack_trace = stack_trace_getter ? stack_trace_getter() : "";
if (!stack_trace.empty()) {
stack_trace = "Stack trace:\n" + stack_trace;
}
LOG(FATAL) << "Singleton " << type.name() << " requested before "
<< "registrationComplete() call.\n"
<< "This usually means that either main() never called "
<< "folly::init, or singleton was requested before main() "
<< "(which is not allowed).\n"
<< stack_trace;
}
[[noreturn]] void singletonWarnCreateCircularDependencyAndAbort(
const TypeDescriptor& type) {
LOG(FATAL) << "circular singleton dependency: " << type.name();
}
[[noreturn]] void singletonWarnRegisterMockEarlyAndAbort(
const TypeDescriptor& type) {
LOG(FATAL) << "Registering mock before singleton was registered: "
<< type.name();
}
void singletonPrintDestructionStackTrace(const TypeDescriptor& type) {
auto trace = detail::getSingletonStackTrace();
LOG(ERROR) << "Singleton " << type.name() << " was released.\n"
<< "Stacktrace:\n" << (trace != "" ? trace : "(not available)");
}