Enabling GraalPy on GraalOS

Author: zslajchrt

graalpython/com.oracle.graal.python.shell/src/com/oracle/graal/python/shell/GraalPythonMain.java

@@ -992,11 +992,16 @@ private void findAndApplyVenvCfg(Builder contextBuilder, String executable) {
                             }
                             if (Files.exists(baseExecutable)) {
                                 contextBuilder.option("python.BaseExecutable", baseExecutable.toString());
-                                /*
-                                 * This is needed to support the legacy GraalVM layout where the
-                                 * executable is a symlink into the 'languages' directory.
-                                 */
-                                contextBuilder.option("python.PythonHome", baseExecutable.getParent().getParent().toString());
+                                if ("/app".equals(baseExecutable.toString())) {
+                                    // GraalOS case
+                                    contextBuilder.option("python.PythonHome", "/");
+                                } else {
+                                    /*
+                                     * This is needed to support the legacy GraalVM layout where the
+                                     * executable is a symlink into the 'languages' directory.
+                                     */
+                                    contextBuilder.option("python.PythonHome", baseExecutable.getParent().getParent().toString());
+                                }
                             }
                         } catch (NullPointerException | InvalidPathException ex) {
                             // NullPointerException covers the possible null result of getParent()

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/Python3Core.java

@@ -112,6 +112,7 @@
 import com.oracle.graal.python.builtins.modules.StringModuleBuiltins;
 import com.oracle.graal.python.builtins.modules.StructModuleBuiltins;
 import com.oracle.graal.python.builtins.modules.SysModuleBuiltins;
+import com.oracle.graal.python.builtins.modules.SysconfigModuleBuiltins;
 import com.oracle.graal.python.builtins.modules.ThreadModuleBuiltins;
 import com.oracle.graal.python.builtins.modules.TimeModuleBuiltins;
 import com.oracle.graal.python.builtins.modules.TokenizeModuleBuiltins;
@@ -568,6 +569,7 @@ private static PythonBuiltins[] initializeBuiltins(TruffleLanguage.Env env) {
                         new WeakRefModuleBuiltins(),
                         new ReferenceTypeBuiltins(),
                         new TracemallocModuleBuiltins(),
+                        new SysconfigModuleBuiltins(),
                         // contextvars
                         new ContextVarBuiltins(),
                         new ContextBuiltins(),

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

@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * The Universal Permissive License (UPL), Version 1.0
+ *
+ * Subject to the condition set forth below, permission is hereby granted to any
+ * person obtaining a copy of this software, associated documentation and/or
+ * data (collectively the "Software"), free of charge and under any and all
+ * copyright rights in the Software, and any and all patent rights owned or
+ * freely licensable by each licensor hereunder covering either (i) the
+ * unmodified Software as contributed to or provided by such licensor, or (ii)
+ * the Larger Works (as defined below), to deal in both
+ *
+ * (a) the Software, and
+ *
+ * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
+ * one is included with the Software each a "Larger Work" to which the Software
+ * is contributed by such licensors),
+ *
+ * without restriction, including without limitation the rights to copy, create
+ * derivative works of, display, perform, and distribute the Software and make,
+ * use, sell, offer for sale, import, export, have made, and have sold the
+ * Software and the Larger Work(s), and to sublicense the foregoing rights on
+ * either these or other terms.
+ *
+ * This license is subject to the following condition:
+ *
+ * The above copyright notice and either this complete permission notice or at a
+ * minimum a reference to the UPL must be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.oracle.graal.python.builtins.modules;
+
+import static com.oracle.graal.python.nodes.BuiltinNames.J__SYSCONFIG;
+
+import java.util.Collections;
+import java.util.List;
+
+import com.oracle.graal.python.builtins.CoreFunctions;
+import com.oracle.graal.python.builtins.PythonBuiltins;
+import com.oracle.graal.python.nodes.function.PythonBuiltinBaseNode;
+import com.oracle.truffle.api.dsl.NodeFactory;
+
+@CoreFunctions(defineModule = J__SYSCONFIG, isEager = true)
+public final class SysconfigModuleBuiltins extends PythonBuiltins {
+    @Override
+    protected List<? extends NodeFactory<? extends PythonBuiltinBaseNode>> getNodeFactories() {
+        return Collections.emptyList();
+    }
+}

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/BuiltinNames.java

@@ -426,7 +426,8 @@ private static TruffleString tsLiteral(String s) {
     public static final String J__SSL = "_ssl";
     public static final TruffleString T__SSL = tsLiteral(J__SSL);
 
-    public static final TruffleString T__SYSCONFIG = tsLiteral("_sysconfig");
+    public static final String J__SYSCONFIG = "_sysconfig";
+    public static final TruffleString T__SYSCONFIG = tsLiteral(J__SYSCONFIG);
 
     public static final String J_READLINE = "readline";
     public static final TruffleString T_READLINE = tsLiteral(J_READLINE);

scripts/generate-fsmappings.sh

@@ -93,17 +93,17 @@ cat <<EOF>> $OUTFILE
         {
             "concrete": "${MUSL_TOOLCHAIN}/lib/libc++.so.1.0",
             "verif": true,
-            "virt": "/proc/lib/libc++.so.1.0"
+            "virt": "/lib/libc++.so.1.0"
         },
         {
             "concrete": "${MUSL_TOOLCHAIN}/lib/libc++abi.so.1.0",
             "verif": true,
-            "virt": "/proc/lib/libc++abi.so.1.0"
+            "virt": "/lib/libc++abi.so.1.0"
         },
         {
             "concrete": "${MUSL_TOOLCHAIN}/lib/libunwind.so.1.0",
             "verif": true,
-            "virt": "/proc/lib/libunwind.so.1.0"
+            "virt": "/lib/libunwind.so.1.0"
         }
     ]
 }