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r343123 | dmajor | 2018-09-26 12:28:39 -0400 (Wed, 26 Sep 2018) | 5 lines

[winasan] Pin the ASan DLL to prevent unloading

Differential Revision: https://reviews.llvm.org/D52505

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--- a/compiler-rt/lib/asan/asan_win.cc	(revision 343122)
+++ b/compiler-rt/lib/asan/asan_win.cc	(revision 343123)
@@ -167,6 +167,14 @@
 namespace __asan {
 
 void InitializePlatformInterceptors() {
+  // The interceptors were not designed to be removable, so we have to keep this
+  // module alive for the life of the process.
+  HMODULE pinned;
+  CHECK(GetModuleHandleExW(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS |
+                           GET_MODULE_HANDLE_EX_FLAG_PIN,
+                           (LPCWSTR)&InitializePlatformInterceptors,
+                           &pinned));
+
   ASAN_INTERCEPT_FUNC(CreateThread);
   ASAN_INTERCEPT_FUNC(SetUnhandledExceptionFilter);
   CHECK(::__interception::OverrideFunction("NtTerminateThread",

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