[llvm-branch-commits] [compiler-rt] release/19.x: Fix libFuzzer not building with pthreads on Windows (#109525) (PR #110663)

[via llvm-branch-commits]

https://github.com/llvmbot created https://github.com/llvm/llvm-project/pull/110663

Backport b4130bee6bfd34d8045f02fc9f951bcb5db9d85c

Requested by: @mstorsjo

>From 35d177578d70c70b38ea9d6cf7a5cceec86291e3 Mon Sep 17 00:00:00 2001
From: Zentrik <llvm.zentrik at gmail.com>
Date: Tue, 24 Sep 2024 21:33:57 +0100
Subject: [PATCH] Fix libFuzzer not building with pthreads on Windows (#109525)

Fixes https://github.com/llvm/llvm-project/issues/106871

(cherry picked from commit b4130bee6bfd34d8045f02fc9f951bcb5db9d85c)
---
 compiler-rt/lib/fuzzer/FuzzerUtilWindows.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/compiler-rt/lib/fuzzer/FuzzerUtilWindows.cpp b/compiler-rt/lib/fuzzer/FuzzerUtilWindows.cpp
index db80eb383885e6..73eea07cf869ff 100644
--- a/compiler-rt/lib/fuzzer/FuzzerUtilWindows.cpp
+++ b/compiler-rt/lib/fuzzer/FuzzerUtilWindows.cpp
@@ -239,6 +239,10 @@ size_t PageSize() {
 }
 
 void SetThreadName(std::thread &thread, const std::string &name) {
+#if defined(_LIBCPP_HAS_THREAD_API_PTHREAD) ||                                 \
+    defined(_GLIBCXX_GCC_GTHR_POSIX_H)
+  (void)pthread_setname_np(thread.native_handle(), name.c_str());
+#else
   typedef HRESULT(WINAPI * proc)(HANDLE, PCWSTR);
   HMODULE kbase = GetModuleHandleA("KernelBase.dll");
   proc ThreadNameProc =
@@ -253,6 +257,7 @@ void SetThreadName(std::thread &thread, const std::string &name) {
       }
     }
   }
+#endif
 }
 
 } // namespace fuzzer