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diff --git a/libsanitizer/asan/asan_init_version.h b/libsanitizer/asan/asan_init_version.h
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+//===-- asan_init_version.h -------------------------------------*- C++ -*-===//
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of AddressSanitizer, an address sanity checker.
+//
+// This header defines a versioned __asan_init function to be called at the
+// startup of the instrumented program.
+//===----------------------------------------------------------------------===//
+#ifndef ASAN_INIT_VERSION_H
+#define ASAN_INIT_VERSION_H
+
+extern "C" {
+ // Every time the ASan ABI changes we also change the version number in the
+ // __asan_init function name. Objects built with incompatible ASan ABI
+ // versions will not link with run-time.
+ // Changes between ABI versions:
+ // v1=>v2: added 'module_name' to __asan_global
+ // v2=>v3: stack frame description (created by the compiler)
+ // contains the function PC as the 3-rd field (see
+ // DescribeAddressIfStack).
+ // v3=>v4: added '__asan_global_source_location' to __asan_global.
+ #define __asan_init __asan_init_v4
+ #define __asan_init_name "__asan_init_v4"
+}
+
+#endif // ASAN_INIT_VERSION_H