ydb-oss sync: add clang16-rt/ to additionalPathsToCopy

1 files changed, 115 insertions, 0 deletions

diff --git a/contrib/libs/clang16-rt/lib/dfsan/dfsan_platform.h b/contrib/libs/clang16-rt/lib/dfsan/dfsan_platform.h
new file mode 100644
index 0000000000..b849b4b528
--- /dev/null
+++ b/contrib/libs/clang16-rt/lib/dfsan/dfsan_platform.h
@@ -0,0 +1,115 @@
+//===-- dfsan_platform.h ----------------------------------------*- C++ -*-===//
+//
+// 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 DataFlowSanitizer.
+//
+// Platform specific information for DFSan.
+//===----------------------------------------------------------------------===//
+
+#ifndef DFSAN_PLATFORM_H
+#define DFSAN_PLATFORM_H
+
+#include "sanitizer_common/sanitizer_common.h"
+#include "sanitizer_common/sanitizer_platform.h"
+
+namespace __dfsan {
+
+using __sanitizer::uptr;
+
+// TODO: The memory mapping code to setup a 1:1 shadow is based on msan.
+// Consider refactoring these into a shared implementation.
+
+struct MappingDesc {
+  uptr start;
+  uptr end;
+  enum Type { INVALID, APP, SHADOW, ORIGIN } type;
+  const char *name;
+};
+
+#if SANITIZER_LINUX && SANITIZER_WORDSIZE == 64
+
+#  if defined(__aarch64__)
+// The mapping assumes 48-bit VMA. AArch64 maps:
+// - 0x0000000000000-0x0100000000000: 39/42/48-bits program own segments
+// - 0x0a00000000000-0x0b00000000000: 48-bits PIE program segments
+//   Ideally, this would extend to 0x0c00000000000 (2^45 bytes - the
+//   maximum ASLR region for 48-bit VMA) but it is too hard to fit in
+//   the larger app/shadow/origin regions.
+// - 0x0e00000000000-0x1000000000000: 48-bits libraries segments
+const MappingDesc kMemoryLayout[] = {
+    {0X0000000000000, 0X0100000000000, MappingDesc::APP, "app-10-13"},
+    {0X0100000000000, 0X0200000000000, MappingDesc::SHADOW, "shadow-14"},
+    {0X0200000000000, 0X0300000000000, MappingDesc::INVALID, "invalid"},
+    {0X0300000000000, 0X0400000000000, MappingDesc::ORIGIN, "origin-14"},
+    {0X0400000000000, 0X0600000000000, MappingDesc::SHADOW, "shadow-15"},
+    {0X0600000000000, 0X0800000000000, MappingDesc::ORIGIN, "origin-15"},
+    {0X0800000000000, 0X0A00000000000, MappingDesc::INVALID, "invalid"},
+    {0X0A00000000000, 0X0B00000000000, MappingDesc::APP, "app-14"},
+    {0X0B00000000000, 0X0C00000000000, MappingDesc::SHADOW, "shadow-10-13"},
+    {0X0C00000000000, 0X0D00000000000, MappingDesc::INVALID, "invalid"},
+    {0X0D00000000000, 0X0E00000000000, MappingDesc::ORIGIN, "origin-10-13"},
+    {0X0E00000000000, 0X1000000000000, MappingDesc::APP, "app-15"},
+};
+#    define MEM_TO_SHADOW(mem) ((uptr)mem ^ 0xB00000000000ULL)
+#    define SHADOW_TO_ORIGIN(shadow) (((uptr)(shadow)) + 0x200000000000ULL)
+
+#  else
+// All of the following configurations are supported.
+// ASLR disabled: main executable and DSOs at 0x555550000000
+// PIE and ASLR: main executable and DSOs at 0x7f0000000000
+// non-PIE: main executable below 0x100000000, DSOs at 0x7f0000000000
+// Heap at 0x700000000000.
+const MappingDesc kMemoryLayout[] = {
+    {0x000000000000ULL, 0x010000000000ULL, MappingDesc::APP, "app-1"},
+    {0x010000000000ULL, 0x100000000000ULL, MappingDesc::SHADOW, "shadow-2"},
+    {0x100000000000ULL, 0x110000000000ULL, MappingDesc::INVALID, "invalid"},
+    {0x110000000000ULL, 0x200000000000ULL, MappingDesc::ORIGIN, "origin-2"},
+    {0x200000000000ULL, 0x300000000000ULL, MappingDesc::SHADOW, "shadow-3"},
+    {0x300000000000ULL, 0x400000000000ULL, MappingDesc::ORIGIN, "origin-3"},
+    {0x400000000000ULL, 0x500000000000ULL, MappingDesc::INVALID, "invalid"},
+    {0x500000000000ULL, 0x510000000000ULL, MappingDesc::SHADOW, "shadow-1"},
+    {0x510000000000ULL, 0x600000000000ULL, MappingDesc::APP, "app-2"},
+    {0x600000000000ULL, 0x610000000000ULL, MappingDesc::ORIGIN, "origin-1"},
+    {0x610000000000ULL, 0x700000000000ULL, MappingDesc::INVALID, "invalid"},
+    {0x700000000000ULL, 0x800000000000ULL, MappingDesc::APP, "app-3"}};
+#    define MEM_TO_SHADOW(mem) (((uptr)(mem)) ^ 0x500000000000ULL)
+#    define SHADOW_TO_ORIGIN(mem) (((uptr)(mem)) + 0x100000000000ULL)
+#  endif
+
+#else
+#  error "Unsupported platform"
+#endif
+
+const uptr kMemoryLayoutSize = sizeof(kMemoryLayout) / sizeof(kMemoryLayout[0]);
+
+#define MEM_TO_ORIGIN(mem) (SHADOW_TO_ORIGIN(MEM_TO_SHADOW((mem))))
+
+#ifndef __clang__
+__attribute__((optimize("unroll-loops")))
+#endif
+inline bool
+addr_is_type(uptr addr, MappingDesc::Type mapping_type) {
+// It is critical for performance that this loop is unrolled (because then it is
+// simplified into just a few constant comparisons).
+#ifdef __clang__
+#  pragma unroll
+#endif
+  for (unsigned i = 0; i < kMemoryLayoutSize; ++i)
+    if (kMemoryLayout[i].type == mapping_type &&
+        addr >= kMemoryLayout[i].start && addr < kMemoryLayout[i].end)
+      return true;
+  return false;
+}
+
+#define MEM_IS_APP(mem) addr_is_type((uptr)(mem), MappingDesc::APP)
+#define MEM_IS_SHADOW(mem) addr_is_type((uptr)(mem), MappingDesc::SHADOW)
+#define MEM_IS_ORIGIN(mem) addr_is_type((uptr)(mem), MappingDesc::ORIGIN)
+
+}  // namespace __dfsan
+
+#endif