From 3a1720af1d7f43edc5b214cde0be11bfb94d077e Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Wed, 23 Oct 2019 17:52:22 +0000
Subject: Vendor import of stripped compiler-rt trunk r375505, the last commit
 before the upstream Subversion repository was made read-only, and the LLVM
 project migrated to GitHub:

https://llvm.org/svn/llvm-project/compiler-rt/trunk@375505
---
 lib/asan/asan_globals_win.cpp | 61 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 lib/asan/asan_globals_win.cpp

(limited to 'lib/asan/asan_globals_win.cpp')

diff --git a/lib/asan/asan_globals_win.cpp b/lib/asan/asan_globals_win.cpp
new file mode 100644
index 000000000000..19af88ab12b4
--- /dev/null
+++ b/lib/asan/asan_globals_win.cpp
@@ -0,0 +1,61 @@
+//===-- asan_globals_win.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
+//
+//===----------------------------------------------------------------------===//
+//
+// Global registration code that is linked into every Windows DLL and EXE.
+//
+//===----------------------------------------------------------------------===//
+
+#include "asan_interface_internal.h"
+#if SANITIZER_WINDOWS
+
+namespace __asan {
+
+#pragma section(".ASAN$GA", read, write)
+#pragma section(".ASAN$GZ", read, write)
+extern "C" __declspec(allocate(".ASAN$GA"))
+    ALIGNED(sizeof(__asan_global)) __asan_global __asan_globals_start = {};
+extern "C" __declspec(allocate(".ASAN$GZ"))
+    ALIGNED(sizeof(__asan_global)) __asan_global __asan_globals_end = {};
+#pragma comment(linker, "/merge:.ASAN=.data")
+
+static void call_on_globals(void (*hook)(__asan_global *, uptr)) {
+  __asan_global *start = &__asan_globals_start + 1;
+  __asan_global *end = &__asan_globals_end;
+  uptr bytediff = (uptr)end - (uptr)start;
+  if (bytediff % sizeof(__asan_global) != 0) {
+#if defined(SANITIZER_DLL_THUNK) || defined(SANITIZER_DYNAMIC_RUNTIME_THUNK)
+    __debugbreak();
+#else
+    CHECK("corrupt asan global array");
+#endif
+  }
+  // We know end >= start because the linker sorts the portion after the dollar
+  // sign alphabetically.
+  uptr n = end - start;
+  hook(start, n);
+}
+
+static void register_dso_globals() {
+  call_on_globals(&__asan_register_globals);
+}
+
+static void unregister_dso_globals() {
+  call_on_globals(&__asan_unregister_globals);
+}
+
+// Register globals
+#pragma section(".CRT$XCU", long, read)
+#pragma section(".CRT$XTX", long, read)
+extern "C" __declspec(allocate(".CRT$XCU"))
+void (*const __asan_dso_reg_hook)() = &register_dso_globals;
+extern "C" __declspec(allocate(".CRT$XTX"))
+void (*const __asan_dso_unreg_hook)() = &unregister_dso_globals;
+
+} // namespace __asan
+
+#endif  // SANITIZER_WINDOWS
-- 
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