src/jdk.vm.ci/share/classes/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotVMConfig.java

@@ -21,10 +21,13 @@
  * questions.
  */
 package jdk.vm.ci.hotspot;
 
 import static jdk.vm.ci.hotspot.HotSpotJVMCIRuntime.runtime;
+import static jdk.vm.ci.hotspot.UnsafeAccess.UNSAFE;
+
+import jdk.internal.misc.Unsafe;
 
 /**
  * Used to access native configuration details.
  *
  * All non-static, public fields in this class are so that they can be compiled as constants.

@@ -48,17 +51,14 @@
      * Gets the host architecture name for the purpose of finding the corresponding
      * {@linkplain HotSpotJVMCIBackendFactory backend}.
      */
     String getHostArchitectureName() {
         String arch = System.getProperty("os.arch");
-        switch (arch) {
-            case "x86_64":
+        if (arch.equals("x86_64")) {
                 arch = "amd64";
-                break;
-            case "sparcv9":
+        } else if (arch.equals("sparcv9")) {
                 arch = "sparc";
-                break;
         }
         return arch;
     }
 
     final boolean useDeferredInitBarriers = getFlag("ReduceInitialCardMarks", Boolean.class);

@@ -229,10 +229,25 @@
 
     final long vmSymbolsSymbols = getFieldAddress("vmSymbols::_symbols[0]", "Symbol*");
     final int vmSymbolsFirstSID = getConstant("vmSymbols::FIRST_SID", Integer.class);
     final int vmSymbolsSIDLimit = getConstant("vmSymbols::SID_LIMIT", Integer.class);
 
+    /**
+     * Returns the symbol in the {@code vmSymbols} table at position {@code index} as a
+     * {@link String}.
+     *
+     * @param index position in the symbol table
+     * @return the symbol at position id
+     */
+    String symbolAt(int index) {
+        HotSpotJVMCIRuntimeProvider runtime = runtime();
+        assert vmSymbolsFirstSID <= index && index < vmSymbolsSIDLimit : "index " + index + " is out of bounds";
+        assert symbolPointerSize == Unsafe.ADDRESS_SIZE : "the following address read is broken";
+        int offset = index * symbolPointerSize;
+        return runtime.getCompilerToVM().getSymbol(UNSAFE.getAddress(vmSymbolsSymbols + offset));
+    }
+
     final int universeBaseVtableSize = getFieldValue("CompilerToVM::Data::Universe_base_vtable_size", Integer.class, "int");
 
     final int baseVtableLength() {
         return universeBaseVtableSize / vtableEntrySize;
     }