Library import 16 (#2433)

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1 files changed, 8 insertions, 75 deletions

diff --git a/util/system/sanitizers.cpp b/util/system/sanitizers.cpp
index bb799a9e2e..3e710b39c7 100644
--- a/util/system/sanitizers.cpp
+++ b/util/system/sanitizers.cpp
@@ -1,42 +1,29 @@
 #include "sanitizers.h"
 #include "thread.h"
 
-#if defined(_asan_enabled_)
-extern "C" {
-    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
+using namespace NSan;
 
 #if defined(_tsan_enabled_)
     #if defined(__clang_major__) && (__clang_major__ >= 9)
-extern "C" {
-    void* __tsan_get_current_fiber(void);
+extern "C" { // sanitizers API
+
+        #if defined(_tsan_enabled_)
     void* __tsan_create_fiber(unsigned flags);
-    void __tsan_destroy_fiber(void* fiber);
-    void __tsan_switch_to_fiber(void* fiber, unsigned flags);
     void __tsan_set_fiber_name(void* fiber, const char* name);
-}
+        #endif
+
+} // sanitizers API
     #else
 namespace {
-    void* __tsan_get_current_fiber(void) {
-        return nullptr;
-    }
     void* __tsan_create_fiber(unsigned) {
         return nullptr;
     }
-    void __tsan_destroy_fiber(void*) {
-    }
-    void __tsan_switch_to_fiber(void*, unsigned) {
-    }
     void __tsan_set_fiber_name(void*, const char*) {
     }
 }
     #endif
 #endif
 
-using namespace NSan;
-
 TFiberContext::TFiberContext() noexcept
     : Token_(nullptr)
     , IsMainFiber_(true)
@@ -45,7 +32,7 @@ TFiberContext::TFiberContext() noexcept
 #endif
 {
     TCurrentThreadLimits sl;
-
+    (void)Token_;
     Stack_ = sl.StackBegin;
     Len_ = sl.StackLength;
 
@@ -70,60 +57,6 @@ TFiberContext::TFiberContext(const void* stack, size_t len, const char* contName
 #endif
 }
 
-TFiberContext::~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
-    }
-}
-
-void TFiberContext::BeforeFinish() noexcept {
-#if defined(_asan_enabled_)
-    __sanitizer_start_switch_fiber(nullptr, nullptr, 0);
-#else
-    (void)Token_;
-    (void)Stack_;
-    (void)Len_;
-#endif
-}
-
-void TFiberContext::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 TFiberContext::AfterSwitch() noexcept {
-#if defined(_asan_enabled_)
-    __sanitizer_finish_switch_fiber(Token_, nullptr, nullptr);
-#endif
-}
-
-void TFiberContext::AfterStart() noexcept {
-#if defined(_asan_enabled_)
-    __sanitizer_finish_switch_fiber(nullptr, nullptr, nullptr);
-#endif
-}
-
 #if defined(_tsan_enabled_)
 extern "C" {
     // This function should not be directly exposed in headers