[GR-47994] fix creating datetime objects when platform access is denied

Author: timfel

graalpython/com.oracle.graal.python.test/src/com/oracle/graal/python/test/advance/ExclusionsTest.java

@@ -41,11 +41,30 @@
 package com.oracle.graal.python.test.advance;
 
 import org.graalvm.polyglot.Context;
+import org.junit.Test;
 
 public class ExclusionsTest {
     public static void main(String[] args) {
         try (Context context = Context.create()) {
             context.eval("python", "print('Hello Python!');");
         }
     }
+
+    @Test
+    public void testDatetimeWithoutPlatformAccess() {
+        if (!"true".equals(System.getProperty("python.WithoutPlatformAccess"))) {
+            return;
+        }
+        var builder = Context.newBuilder().allowExperimentalOptions(true);
+        if (System.getenv("GRAAL_PYTHONHOME") != null) {
+            builder.option("python.PythonHome", System.getenv("GRAAL_PYTHONHOME"));
+        }
+        try (Context context = builder.build()) {
+            context.eval("python",
+                            """
+                            import datetime
+                            datetime.datetime.strptime('2014 7 2 6 14 0 742 +0700', '%Y %m %d %H %M %S %f %z')
+                            """);
+        }
+    }
 }

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/TimeModuleBuiltins.java

@@ -325,7 +325,7 @@ Object tzset() {
                 }
                 TimeZone.setDefault(TimeZone.getTimeZone(tzEnv));
             } else {
-                PRaiseNode.raiseUncached(this, PythonBuiltinClassType.SystemError, SET_TIMEZONE_ERROR);
+                PRaiseNode.raiseUncached(this, PythonBuiltinClassType.AttributeError, SET_TIMEZONE_ERROR);
             }
             return PNone.NONE;
         }

mx.graalpython/mx_graalpython.py

@@ -1412,6 +1412,14 @@ def graalpython_gate_runner(args, tasks):
                 )
             else:
                 punittest(['--verbose'], report=report())
+                # Run tests with static exclusion paths
+                jdk = mx.get_jdk()
+                prev = jdk.java_args_pfx
+                try:
+                    jdk.java_args_pfx = (mx._opts.java_args or []) + ['-Dpython.WithoutPlatformAccess=true']
+                    punittest(['--verbose', '--no-leak-tests', '--regex', 'com.oracle.graal.python.test.advance.ExclusionsTest'])
+                finally:
+                    jdk.java_args_pfx = prev
 
     # Unittests on JVM
     with Task('GraalPython Python unittests', tasks, tags=[GraalPythonTags.unittest]) as task: