[llvm-branch-commits] [clang] [compiler-rt] [TySan] A Type Sanitizer (Runtime Library) (PR #76261)

[Florian Hahn via llvm-branch-commits]

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@@ -0,0 +1,344 @@
+//===-- tysan.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 TypeSanitizer.
+//
+// TypeSanitizer runtime.
+//===----------------------------------------------------------------------===//
+
+#include "sanitizer_common/sanitizer_atomic.h"
+#include "sanitizer_common/sanitizer_common.h"
+#include "sanitizer_common/sanitizer_flag_parser.h"
+#include "sanitizer_common/sanitizer_flags.h"
+#include "sanitizer_common/sanitizer_libc.h"
+#include "sanitizer_common/sanitizer_report_decorator.h"
+#include "sanitizer_common/sanitizer_stacktrace.h"
+#include "sanitizer_common/sanitizer_symbolizer.h"
+
+#include "tysan/tysan.h"
+
+using namespace __sanitizer;
+using namespace __tysan;
+
+extern "C" SANITIZER_INTERFACE_ATTRIBUTE void
+tysan_set_type_unknown(const void *addr, uptr size) {
+  if (tysan_inited)
+    internal_memset(shadow_for(addr), 0, size * sizeof(uptr));
+}
+
+extern "C" SANITIZER_INTERFACE_ATTRIBUTE void
+tysan_copy_types(const void *daddr, const void *saddr, uptr size) {
+  if (tysan_inited)
+    internal_memmove(shadow_for(daddr), shadow_for(saddr), size * sizeof(uptr));
+}
+
+static const char *getDisplayName(const char *Name) {
+  if (Name[0] == '\0')
+    return "<anonymous type>";
+
+  // Clang generates tags for C++ types that demangle as typeinfo. Remove the
+  // prefix from the generated string.
+  const char TIPrefix[] = "typeinfo name for ";
+
+  const char *DName = Symbolizer::GetOrInit()->Demangle(Name);
+  if (!internal_strncmp(DName, TIPrefix, sizeof(TIPrefix) - 1))
+    DName += sizeof(TIPrefix) - 1;
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fhahn wrote:

Updated, thanks

https://github.com/llvm/llvm-project/pull/76261