[Comgr] use shared_ptr for rocm path detection

This shows up as a leak. Make sure the memory is released after the
program is done executing.

Change-Id: I5b3e0a3f0e2e744cb19a9a42be2eb525d5c2bd9d

Author: cjatin

amd/comgr/src/comgr-env.cpp

@@ -38,6 +38,7 @@
 #include "llvm/Support/VirtualFileSystem.h"
 
 #include <fstream>
+#include <memory>
 #include <stdlib.h>
 
 using namespace llvm;
@@ -245,40 +246,35 @@ class SpackInstallationDetector : public InstallationDetector {
   }
 };
 
-InstallationDetector *CreatePathDetector(StringRef Path,
-                                         bool isComgrPath = false) {
+std::shared_ptr<InstallationDetector>
+CreatePathDetector(StringRef Path, bool isComgrPath = false) {
   StringRef DirName = llvm::sys::path::filename(Path);
   if ((!isComgrPath && DirName.starts_with("rocm-cmake-")) ||
       (isComgrPath && DirName.starts_with("comgr-"))) {
-    return new SpackInstallationDetector(Path, isComgrPath);
+    return std::make_shared<SpackInstallationDetector>(Path, isComgrPath);
   }
 
-  return new InstallationDetector(Path, isComgrPath);
+  return std::make_shared<InstallationDetector>(Path, isComgrPath);
 }
 
-InstallationDetector *getDetectorImpl() {
+std::shared_ptr<InstallationDetector> getDetectorImpl() {
   SmallString<128> ROCmInstallPath;
 
   static const char *EnvROCMPath = std::getenv("ROCM_PATH");
   if (EnvROCMPath) {
     ROCmInstallPath = EnvROCMPath;
   }
 
-  InstallationDetector *Detector;
   if (ROCmInstallPath == "") {
     std::string ComgrInstallationPath = getComgrInstallPathFromExecutable();
-    Detector =
-        CreatePathDetector(ComgrInstallationPath, true /* isComgrPath */);
-  } else {
-    Detector = CreatePathDetector(ROCmInstallPath);
+    return CreatePathDetector(ComgrInstallationPath, true /* isComgrPath */);
   }
-
-  return Detector;
+  return CreatePathDetector(ROCmInstallPath);
 }
 
 InstallationDetector *getDetector() {
-  static InstallationDetector *Detector = getDetectorImpl();
-  return Detector;
+  static auto Detector = getDetectorImpl();
+  return Detector.get();
 }
 
 llvm::StringRef getROCMPath() { return getDetector()->getROCmPath(); }