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#pragma once
#include "defaults.h"
extern "C" { // sanitizers API
#if defined(_asan_enabled_) || defined(_lsan_enabled_)
void __lsan_ignore_object(const void* p);
#endif
#if defined(_asan_enabled_)
void __sanitizer_start_switch_fiber(void** fake_stack_save, const void* bottom, size_t size);
void __sanitizer_finish_switch_fiber(void* fake_stack_save, const void** old_bottom, size_t* old_size);
#endif
#if defined(_msan_enabled_)
void __msan_unpoison(const volatile void* a, size_t size);
void __msan_poison(const volatile void* a, size_t size);
void __msan_check_mem_is_initialized(const volatile void* x, size_t size);
#endif
#if defined(_tsan_enabled_)
void __tsan_acquire(void* a);
void __tsan_release(void* a);
void* __tsan_get_current_fiber(void);
void __tsan_destroy_fiber(void* fiber);
void __tsan_switch_to_fiber(void* fiber, unsigned flags);
#endif
} // sanitizers API
namespace NSan {
class TFiberContext {
public:
TFiberContext() noexcept;
TFiberContext(const void* stack, size_t len, const char* contName) noexcept;
~TFiberContext() noexcept {
if (!IsMainFiber_) {
#if defined(_asan_enabled_)
if (Token_) {
// destroy saved FakeStack
void* activeFakeStack = nullptr;
const void* activeStack = nullptr;
size_t activeStackSize = 0;
__sanitizer_start_switch_fiber(&activeFakeStack, (char*)Stack_, Len_);
__sanitizer_finish_switch_fiber(Token_, &activeStack, &activeStackSize);
__sanitizer_start_switch_fiber(nullptr, activeStack, activeStackSize);
__sanitizer_finish_switch_fiber(activeFakeStack, nullptr, nullptr);
}
#endif
#if defined(_tsan_enabled_)
__tsan_destroy_fiber(CurrentTSanFiberContext_);
#endif
}
}
Y_FORCE_INLINE void BeforeSwitch(TFiberContext* old) noexcept {
#if defined(_asan_enabled_)
__sanitizer_start_switch_fiber(old ? &old->Token_ : nullptr, (char*)Stack_, Len_);
#else
(void)old;
#endif
#if defined(_tsan_enabled_)
__tsan_switch_to_fiber(CurrentTSanFiberContext_, /*flags =*/0);
#endif
}
void AfterSwitch() noexcept {
#if defined(_asan_enabled_)
__sanitizer_finish_switch_fiber(Token_, nullptr, nullptr);
#endif
}
private:
void* Token_;
const void* Stack_;
size_t Len_;
const bool IsMainFiber_;
#if defined(_tsan_enabled_)
void* const CurrentTSanFiberContext_;
#endif
};
// Returns plain if no sanitizer enabled or sanitized otherwise
// Ment to be used in test code for constants (timeouts, etc)
template <typename T>
inline constexpr static T PlainOrUnderSanitizer(T plain, T sanitized) noexcept {
#if defined(_tsan_enabled_) || defined(_msan_enabled_) || defined(_asan_enabled_)
Y_UNUSED(plain);
return sanitized;
#else
Y_UNUSED(sanitized);
return plain;
#endif
}
// Determines if asan present
inline constexpr static bool ASanIsOn() noexcept {
#if defined(_asan_enabled_)
return true;
#else
return false;
#endif
}
// Determines if tsan present
inline constexpr static bool TSanIsOn() noexcept {
#if defined(_tsan_enabled_)
return true;
#else
return false;
#endif
}
// Determines if msan present
inline constexpr static bool MSanIsOn() noexcept {
#if defined(_msan_enabled_)
return true;
#else
return false;
#endif
}
// Make memory region fully initialized (without changing its contents).
inline static void Unpoison(const volatile void* a, size_t size) noexcept {
#if defined(_msan_enabled_)
__msan_unpoison(a, size);
#else
Y_UNUSED(a);
Y_UNUSED(size);
#endif
}
// Make memory region fully uninitialized (without changing its contents).
// This is a legacy interface that does not update origin information. Use __msan_allocated_memory() instead.
inline static void Poison(const volatile void* a, size_t size) noexcept {
#if defined(_msan_enabled_)
__msan_poison(a, size);
#else
Y_UNUSED(a);
Y_UNUSED(size);
#endif
}
// Checks that memory range is fully initialized, and reports an error if it is not.
inline static void CheckMemIsInitialized(const volatile void* a, size_t size) noexcept {
#if defined(_msan_enabled_)
__msan_check_mem_is_initialized(a, size);
#else
Y_UNUSED(a);
Y_UNUSED(size);
#endif
}
inline static void MarkAsIntentionallyLeaked(const void* ptr) noexcept {
#if defined(_asan_enabled_) || defined(_lsan_enabled_)
__lsan_ignore_object(ptr);
#else
Y_UNUSED(ptr);
#endif
}
#if defined(_tsan_enabled_)
// defined in .cpp to avoid exposing problematic C-linkage version of AnnotateBenignRaceSized(...)
void AnnotateBenignRaceSized(const char* file, int line,
const volatile void* address,
size_t size,
const char* description) noexcept;
#else
inline static void AnnotateBenignRaceSized(const char* file, int line,
const volatile void* address,
size_t size,
const char* description) noexcept {
Y_UNUSED(file);
Y_UNUSED(line);
Y_UNUSED(address);
Y_UNUSED(size);
Y_UNUSED(description);
}
#endif
inline static void Acquire(void* a) {
#if defined(_tsan_enabled_)
__tsan_acquire(a);
#else
Y_UNUSED(a);
#endif
}
inline static void Release(void* a) {
#if defined(_tsan_enabled_)
__tsan_release(a);
#else
Y_UNUSED(a);
#endif
}
} // namespace NSan
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