1 files changed, 4 insertions, 77 deletions
diff --git a/compiler-rt/lib/scudo/standalone/bytemap.h b/compiler-rt/lib/scudo/standalone/bytemap.h
index a03a0c471062..e0d54f4e5971 100644
--- a/compiler-rt/lib/scudo/standalone/bytemap.h
+++ b/compiler-rt/lib/scudo/standalone/bytemap.h
@@ -17,12 +17,10 @@ namespace scudo {
 
 template <uptr Size> class FlatByteMap {
 public:
-  void initLinkerInitialized() {
-    Map = reinterpret_cast<u8 *>(map(nullptr, Size, "scudo:bytemap"));
-  }
-  void init() { initLinkerInitialized(); }
+  void initLinkerInitialized() {}
+  void init() { memset(Map, 0, sizeof(Map)); }
 
-  void unmapTestOnly() { unmap(reinterpret_cast<void *>(Map), Size); }
+  void unmapTestOnly() {}
 
   void set(uptr Index, u8 Value) {
     DCHECK_LT(Index, Size);
@@ -38,78 +36,7 @@ public:
   void enable() {}
 
 private:
-  u8 *Map;
-};
-
-template <uptr Level1Size, uptr Level2Size> class TwoLevelByteMap {
-public:
-  void initLinkerInitialized() {
-    Level1Map = reinterpret_cast<atomic_uptr *>(
-        map(nullptr, sizeof(atomic_uptr) * Level1Size, "scudo:bytemap"));
-  }
-  void init() {
-    Mutex.init();
-    initLinkerInitialized();
-  }
-
-  void reset() {
-    for (uptr I = 0; I < Level1Size; I++) {
-      u8 *P = get(I);
-      if (!P)
-        continue;
-      unmap(P, Level2Size);
-    }
-    memset(Level1Map, 0, sizeof(atomic_uptr) * Level1Size);
-  }
-
-  void unmapTestOnly() {
-    reset();
-    unmap(reinterpret_cast<void *>(Level1Map),
-          sizeof(atomic_uptr) * Level1Size);
-  }
-
-  uptr size() const { return Level1Size * Level2Size; }
-
-  void set(uptr Index, u8 Value) {
-    DCHECK_LT(Index, Level1Size * Level2Size);
-    u8 *Level2Map = getOrCreate(Index / Level2Size);
-    DCHECK_EQ(0U, Level2Map[Index % Level2Size]);
-    Level2Map[Index % Level2Size] = Value;
-  }
-
-  u8 operator[](uptr Index) const {
-    DCHECK_LT(Index, Level1Size * Level2Size);
-    u8 *Level2Map = get(Index / Level2Size);
-    if (!Level2Map)
-      return 0;
-    return Level2Map[Index % Level2Size];
-  }
-
-  void disable() { Mutex.lock(); }
-  void enable() { Mutex.unlock(); }
-
-private:
-  u8 *get(uptr Index) const {
-    DCHECK_LT(Index, Level1Size);
-    return reinterpret_cast<u8 *>(
-        atomic_load(&Level1Map[Index], memory_order_acquire));
-  }
-
-  u8 *getOrCreate(uptr Index) {
-    u8 *Res = get(Index);
-    if (!Res) {
-      ScopedLock L(Mutex);
-      if (!(Res = get(Index))) {
-        Res = reinterpret_cast<u8 *>(map(nullptr, Level2Size, "scudo:bytemap"));
-        atomic_store(&Level1Map[Index], reinterpret_cast<uptr>(Res),
-                     memory_order_release);
-      }
-    }
-    return Res;
-  }
-
-  atomic_uptr *Level1Map;
-  HybridMutex Mutex;
+  u8 Map[Size];
 };
 
 } // namespace scudo