Revert "Support: add llvm::thread class that supports specifying stack size."

It's causing build failures because DefaultStackSize isn't defined everywhere
it should be and I need time to investigate.

1 files changed, 4 insertions, 7 deletions

diff --git a/llvm/lib/Support/CrashRecoveryContext.cpp b/llvm/lib/Support/CrashRecoveryContext.cpp
index 433d99d..3ee6a4f 100644
--- a/llvm/lib/Support/CrashRecoveryContext.cpp
+++ b/llvm/lib/Support/CrashRecoveryContext.cpp
@@ -13,7 +13,6 @@
 #include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/Signals.h"
 #include "llvm/Support/ThreadLocal.h"
-#include "llvm/Support/thread.h"
 #include <mutex>
 #include <setjmp.h>
 
@@ -501,12 +500,10 @@ bool CrashRecoveryContext::RunSafelyOnThread(function_ref<void()> Fn,
                                              unsigned RequestedStackSize) {
   bool UseBackgroundPriority = hasThreadBackgroundPriority();
   RunSafelyOnThreadInfo Info = { Fn, this, UseBackgroundPriority, false };
-  llvm::thread Thread(RequestedStackSize == 0
-                          ? llvm::None
-                          : llvm::Optional<unsigned>(RequestedStackSize),
-                      RunSafelyOnThread_Dispatch, &Info);
-  Thread.join();
-
+  llvm_execute_on_thread(RunSafelyOnThread_Dispatch, &Info,
+                         RequestedStackSize == 0
+                             ? llvm::None
+                             : llvm::Optional<unsigned>(RequestedStackSize));
   if (CrashRecoveryContextImpl *CRC = (CrashRecoveryContextImpl *)Impl)
     CRC->setSwitchedThread();
   return Info.Result;