diff --git a/lldb/source/Host/macosx/objcxx/Host.mm b/lldb/source/Host/macosx/objcxx/Host.mm
--- a/lldb/source/Host/macosx/objcxx/Host.mm
+++ b/lldb/source/Host/macosx/objcxx/Host.mm
@@ -503,12 +503,12 @@
       uint32_t argc = data.GetU32(&offset);
       llvm::Triple &triple = process_info.GetArchitecture().GetTriple();
       const llvm::Triple::ArchType triple_arch = triple.getArch();
-      const bool check_for_ios_simulator =
+      bool check_for_ios_simulator =
           (triple_arch == llvm::Triple::x86 ||
            triple_arch == llvm::Triple::x86_64);
-      const char *cstr = data.GetCStr(&offset);
-      if (cstr) {
-        process_info.GetExecutableFile().SetFile(cstr, FileSpec::Style::native);
+      llvm::StringRef str(data.GetCStr(&offset));
+      if (!str.empty()) {
+        process_info.GetExecutableFile().SetFile(str, FileSpec::Style::native);
 
         if (match_info_ptr == NULL ||
             NameMatches(
@@ -525,27 +525,29 @@
           // Now extract all arguments
           Args &proc_args = process_info.GetArguments();
           for (int i = 0; i < static_cast<int>(argc); ++i) {
-            cstr = data.GetCStr(&offset);
-            if (cstr)
-              proc_args.AppendArgument(llvm::StringRef(cstr));
+            str = data.GetCStr(&offset);
+            if (!str.empty())
+              proc_args.AppendArgument(str);
           }
 
           Environment &proc_env = process_info.GetEnvironment();
-          while ((cstr = data.GetCStr(&offset))) {
-            if (cstr[0] == '\0')
+          process_info.GetArchitecture().GetTriple().setOS(
+              llvm::Triple::MacOSX);
+          while (true) {
+            str = data.GetCStr(&offset);
+            if (str.empty())
               break;
 
             if (check_for_ios_simulator) {
-              if (strncmp(cstr, "SIMULATOR_UDID=", strlen("SIMULATOR_UDID=")) ==
-                  0)
+              if (str.startswith("SIMULATOR_UDID=")) {
                 process_info.GetArchitecture().GetTriple().setOS(
                     llvm::Triple::IOS);
-              else
-                process_info.GetArchitecture().GetTriple().setOS(
-                    llvm::Triple::MacOSX);
+                process_info.GetArchitecture().GetTriple().setEnvironment(
+                    llvm::Triple::Simulator);
+                check_for_ios_simulator = false;
+              }
             }
-
-            proc_env.insert(cstr);
+            proc_env.insert(str);
           }
           return true;
         }