make sure to unlock keymgr if the JIT is created and destroyed, all

locks must be matched with unlocks.  Also, use calloc to allocate the
block so that it is properly zero'd.  Thanks to Nick Kledzik for
tracking this down.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69314 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/ExecutionEngine/JIT/JIT.cpp b/lib/ExecutionEngine/JIT/JIT.cpp
index 5720149..986ec91 100644 (file)
--- a/lib/ExecutionEngine/JIT/JIT.cpp
+++ b/lib/ExecutionEngine/JIT/JIT.cpp
@@ -237,11 +237,9 @@ JIT::JIT(ModuleProvider *MP, TargetMachine &tm, TargetJITInfo &tji,
   // The key is created on demand, and libgcc creates it the first time an
   // exception occurs. Since we need the key to register frames, we create
   // it now.
-  if (!LOI) {
-    LOI = (LibgccObjectInfo*)malloc(sizeof(struct LibgccObjectInfo)); 
-    _keymgr_set_and_unlock_processwide_ptr(KEYMGR_GCC3_DW2_OBJ_LIST,
-                                           LOI);
-  }
+  if (!LOI)
+    LOI = (LibgccObjectInfo*)calloc(sizeof(struct LibgccObjectInfo), 1); 
+  _keymgr_set_and_unlock_processwide_ptr(KEYMGR_GCC3_DW2_OBJ_LIST, LOI);
   InstallExceptionTableRegister(DarwinRegisterFrame);
 #else
   InstallExceptionTableRegister(__register_frame);