[SYCL] Add diagnostic on invalid device list (#1906)

Author: romanovvlad

sycl/source/detail/platform_impl.cpp

@@ -126,6 +126,9 @@ static std::vector<DevDescT> getAllowListDesc() {
       valuePtr = &decDescs.back().devDriverVer;
       size = &decDescs.back().devDriverVerSize;
       str += sizeof(driverVerStr) - 1;
+    } else {
+      throw sycl::runtime_error("Unrecognized key in device allowlist",
+                                PI_INVALID_VALUE);
     }
 
     if (':' != *str)

sycl/test/config/allowlist.cpp

@@ -8,6 +8,7 @@
 // RUN: env TEST_DEVICE_AVAILABLE=1 env SYCL_CONFIG_FILE_NAME=%t2.conf %t.out
 //
 // RUN: env TEST_DEVICE_IS_NOT_AVAILABLE=1 env SYCL_DEVICE_ALLOWLIST="PlatformName:{{SUCH NAME DOESN'T EXIST}}" %t.out
+// RUN: env TEST_INCORRECT_VALUE=1 env SYCL_DEVICE_ALLOWLIST="IncorrectKey:{{.*}}" %t.out
 
 #include <CL/sycl.hpp>
 #include <iostream>
@@ -86,5 +87,16 @@ int main() {
     return 0;
   }
 
+  if (getenv("TEST_INCORRECT_VALUE")) {
+    try {
+      sycl::platform::get_platforms();
+    } catch (sycl::runtime_error &E) {
+      const std::string ExpectedMsg("Unrecognized key in device allowlist");
+      const std::string GotMessage(E.what());
+      const bool CorrectMeg = GotMessage.find(ExpectedMsg) != std::string::npos;
+      return CorrectMeg ? 0 : 1;
+    }
+  }
+
   throw std::runtime_error("Unhandled situation");
 }