Prevent ICD from loading outdated amdocl binary 1.Keep track of libra…

…ry name in KHRicdVendorRec 2.Check if library with the same name has already been loaded before adding it in ICD list

loader/icd.c

@@ -79,6 +79,17 @@ void khrIcdVendorAdd(const char *libraryName)
         goto Done;
     }
 
+    // get the library's file name
+    const char *libName = libraryName;
+    const char *c;
+    for (c = libraryName; *c; ++c)
+    {
+        if (*c == DIRECTORY_SYMBOL)
+        {
+            libName = c + 1;
+        }
+    }
+
     // ensure that we haven't already loaded this vendor
     for (vendorIterator = khrIcdVendors; vendorIterator; vendorIterator = vendorIterator->next)
     {
@@ -87,6 +98,11 @@ void khrIcdVendorAdd(const char *libraryName)
             KHR_ICD_TRACE("already loaded vendor %s, nothing to do here\n", libraryName);
             goto Done;
         }
+        if (!strcmp(vendorIterator->libName, libName))
+        {
+            KHR_ICD_TRACE("already loaded library %s, nothing to do here\n", libName);
+            goto Done;
+        }
     }
 
     // get the library's clGetExtensionFunctionAddress pointer
@@ -184,6 +200,8 @@ void khrIcdVendorAdd(const char *libraryName)
             KHR_ICD_TRACE("failed get platform handle to library\n");
             continue;
         }
+        vendor->libName = (char *)malloc(strlen(libName) + 1);
+        strcpy(vendor->libName, libName);
         vendor->clGetExtensionFunctionAddress = p_clGetExtensionFunctionAddress;
         vendor->platform = platforms[i];
         vendor->suffix = suffix;
@@ -417,3 +435,15 @@ void khrIcdContextPropertiesGetPlatform(const cl_context_properties *properties,
     }
 }
 
+void khrIcdFreeLibName()
+{
+    KHRicdVendor *vendorIterator;
+    for (vendorIterator = khrIcdVendors; vendorIterator; vendorIterator = vendorIterator->next)
+    {
+        if (vendorIterator->libName != NULL)
+        {
+            free(vendorIterator->libName);
+            vendorIterator->libName = NULL;
+        }
+    }
+}

loader/icd.h

@@ -69,6 +69,9 @@ struct KHRicdVendorRec
     // the loaded library object (true type varies on Linux versus Windows)
     void *library;
 
+    // the file name of the library
+    char *libName;
+
     // the extension suffix for this platform
     char *suffix;
 
@@ -160,6 +163,9 @@ void khrIcdContextPropertiesGetPlatform(
     const cl_context_properties *properties, 
     cl_platform_id *outPlatform);
 
+// free libName in KHRicdVendorRec struct
+void khrIcdFreeLibName();
+
 // internal tracing macros
 #define KHR_ICD_TRACE(...) \
 do \

loader/linux/icd_linux.c

@@ -145,6 +145,8 @@ void khrIcdOsVendorsEnumerate(void)
         closedir(dir);
     }
 
+    khrIcdFreeLibName();
+
     if (NULL != envPath)
     {
         khrIcd_free_getenv(envPath);

loader/windows/icd_windows.c

@@ -247,6 +247,9 @@ BOOL CALLBACK khrIcdOsVendorsEnumerate(PINIT_ONCE InitOnce, PVOID Parameter, PVO
     {
         KHR_ICD_TRACE("Failed to close platforms key %s, ignoring\n", platformsName);
     }
+
+    khrIcdFreeLibName();
+
 #if defined(CL_ENABLE_LAYERS)
     khrIcdLayersEnumerateEnv();
 #endif // defined(CL_ENABLE_LAYERS)