Add clang20-rt into ydb sync config

commit_hash:a644e6487e802adc4b59a62ef53000053f586377

1 files changed, 48 insertions, 0 deletions

diff --git a/contrib/libs/clang20-rt/lib/memprof/memprof_mibmap.cpp b/contrib/libs/clang20-rt/lib/memprof/memprof_mibmap.cpp
new file mode 100644
index 00000000000..a49ed8bf4fd
--- /dev/null
+++ b/contrib/libs/clang20-rt/lib/memprof/memprof_mibmap.cpp
@@ -0,0 +1,48 @@
+//===-- memprof_mibmap.cpp -----------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of MemProfiler, a memory profiler.
+//
+//===----------------------------------------------------------------------===//
+
+#include "memprof_mibmap.h"
+#include "profile/MemProfData.inc"
+#include "sanitizer_common/sanitizer_allocator_internal.h"
+#include "sanitizer_common/sanitizer_mutex.h"
+
+namespace __memprof {
+using ::llvm::memprof::MemInfoBlock;
+
+void InsertOrMerge(const uptr Id, const MemInfoBlock &Block, MIBMapTy &Map) {
+  MIBMapTy::Handle h(&Map, static_cast<uptr>(Id), /*remove=*/false,
+                     /*create=*/true);
+  if (h.created()) {
+    LockedMemInfoBlock *lmib =
+        (LockedMemInfoBlock *)InternalAlloc(sizeof(LockedMemInfoBlock));
+    lmib->mutex.Init();
+    lmib->mib = Block;
+    *h = lmib;
+  } else {
+    LockedMemInfoBlock *lmib = *h;
+    SpinMutexLock lock(&lmib->mutex);
+    uintptr_t ShorterHistogram;
+    if (Block.AccessHistogramSize > lmib->mib.AccessHistogramSize)
+      ShorterHistogram = lmib->mib.AccessHistogram;
+    else
+      ShorterHistogram = Block.AccessHistogram;
+
+    lmib->mib.Merge(Block);
+    // The larger histogram is kept and the shorter histogram is discarded after
+    // adding the counters to the larger historam. Free only the shorter
+    // Histogram
+    if (Block.AccessHistogramSize > 0 || lmib->mib.AccessHistogramSize > 0)
+      InternalFree((void *)ShorterHistogram);
+  }
+}
+
+} // namespace __memprof