[llvm] [Offload] Store kernel name in GenericKernelTy (PR #142799)

[Ross Brunton via llvm-commits]

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@@ -256,7 +256,12 @@ class DeviceImageTy {
 struct GenericKernelTy {
   /// Construct a kernel with a name and a execution mode.
   GenericKernelTy(const char *Name)
-      : Name(Name), PreferredNumThreads(0), MaxNumThreads(0) {}
+      : Name(Name), PreferredNumThreads(0), MaxNumThreads(0) {
+    // Ensure that the name is null terminated so getName() can just return the
+    // pointer
+    this->Name.push_back('\0');
+    this->Name.pop_back();
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RossBrunton wrote:

When SmallString copies it into its internal buffer, it only copies strlen bytes, which excludes the null terminator.

https://github.com/llvm/llvm-project/pull/142799