[compiler-rt] [llvm] [PGO][AMDGPU] Add basic HIP offload PGO support (PR #177665)

[Yaxun Liu via llvm-commits]

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@@ -9,19 +9,68 @@
 // This file is a part of AddressSanitizer, an address sanity checker.
 //
 // Linux-specific interception methods.
+//
+// POSIX dynamic-library helpers (dlopen / dlsym) live here for every
+// non-Windows interception target (Linux, *BSD, Darwin, AIX, Fuchsia, …).
+// macOS/AIX/Fuchsia compile this TU for RTInterception but do not use the
+// Linux-specific InterceptFunction helpers below.
 //===----------------------------------------------------------------------===//
 
 #include "interception.h"
 
+#if !SANITIZER_WINDOWS
+
+#  include <dlfcn.h>
+
+#  pragma weak dlopen
+#  pragma weak dlsym
+#  pragma weak dlvsym
+
+namespace __interception {
+
+bool DynamicLoaderAvailable() { return dlopen != nullptr && dlsym != nullptr; }
+
+void* OpenLibrary(const char* name) {
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yxsamliu wrote:

interception’s existing public APIs here are already PascalCase (e.g. InterceptFunction, OverrideFunction), so we matched that local style

https://github.com/llvm/llvm-project/pull/177665