Allow SDK to run in environments prohibiting use of sun.misc.Unsafe

sdk/trace-shaded-deps/build.gradle.kts

@@ -26,3 +26,8 @@ tasks {
     into("build/extracted/shadow")
   }
 }
+
+tasks.withType<Test>().configureEach {
+  // JcToolsSecurityManagerTest interferes with JcToolsTest
+  setForkEvery(1)
+}

sdk/trace-shaded-deps/src/main/java/io/opentelemetry/sdk/trace/internal/JcTools.java

@@ -5,9 +5,13 @@
 
 package io.opentelemetry.sdk.trace.internal;
 
+import java.util.Objects;
 import java.util.Queue;
 import java.util.concurrent.ArrayBlockingQueue;
+import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.function.Consumer;
+import java.util.logging.Level;
+import java.util.logging.Logger;
 import org.jctools.queues.MessagePassingQueue;
 import org.jctools.queues.MpscArrayQueue;
 
@@ -19,14 +23,24 @@
  */
 public final class JcTools {
 
+  private static final AtomicBoolean queueCreationWarningLogged = new AtomicBoolean();
+  private static final Logger logger = Logger.getLogger(JcTools.class.getName());
+
   /**
    * Returns a new {@link Queue} appropriate for use with multiple producers and a single consumer.
    */
   public static <T> Queue<T> newFixedSizeQueue(int capacity) {
     try {
       return new MpscArrayQueue<>(capacity);
-    } catch (java.lang.NoClassDefFoundError e) {
-      // Happens when modules such as jdk.unsupported are disabled in a custom JRE distribution
+    } catch (java.lang.NoClassDefFoundError | java.lang.ExceptionInInitializerError e) {
+      if (!queueCreationWarningLogged.getAndSet(true)) {
+        logger.log(
+            Level.WARNING,
+            "Cannot create high-performance queue, reverting to ArrayBlockingQueue ({0})",
+            Objects.toString(e, "unknown cause"));
+      }
+      // Happens when modules such as jdk.unsupported are disabled in a custom JRE distribution,
+      // or a security manager preventing access to Unsafe is installed.
       return new ArrayBlockingQueue<>(capacity);
     }
   }

sdk/trace-shaded-deps/src/test/java/io/opentelemetry/sdk/trace/internal/JcToolsSecurityManagerTest.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package io.opentelemetry.sdk.trace.internal;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import io.opentelemetry.internal.testing.slf4j.SuppressLogger;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.util.Queue;
+import java.util.concurrent.ArrayBlockingQueue;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.condition.EnabledOnJre;
+import org.junit.jupiter.api.condition.JRE;
+
+public class JcToolsSecurityManagerTest {
+
+  @Test
+  @EnabledOnJre({JRE.JAVA_8, JRE.JAVA_11, JRE.JAVA_17})
+  @SuppressLogger(JcTools.class)
+  void newFixedSizeQueue_SunMiscProhibited() {
+    assertThat(System.getSecurityManager()).isNull();
+    SunMiscProhibitedSecurityManager testingSecurityManager =
+        new SunMiscProhibitedSecurityManager();
+    try {
+      System.setSecurityManager(testingSecurityManager);
+      Queue<Object> queue =
+          AccessController.doPrivileged(
+              (PrivilegedAction<Queue<Object>>) () -> JcTools.newFixedSizeQueue(10));
+      assertThat(queue).isInstanceOf(ArrayBlockingQueue.class);
+    } finally {
+      System.setSecurityManager(null);
+    }
+  }
+}

sdk/trace-shaded-deps/src/test/java/io/opentelemetry/sdk/trace/internal/SunMiscProhibitedSecurityManager.java

@@ -0,0 +1,111 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package io.opentelemetry.sdk.trace.internal;
+
+import java.io.FileDescriptor;
+import java.net.InetAddress;
+import java.security.AccessControlException;
+import java.security.Permission;
+
+/**
+ * A security manager which disallows access to classes in sun.misc. Running the tests with a
+ * standard security manager is too invasive.
+ */
+public class SunMiscProhibitedSecurityManager extends SecurityManager {
+
+  public SunMiscProhibitedSecurityManager() {}
+
+  @Override
+  protected Class<?>[] getClassContext() {
+    return super.getClassContext();
+  }
+
+  @Override
+  public void checkPermission(Permission perm) {
+    if (perm.getName().equals("accessClassInPackage.sun.misc")) {
+      throw new AccessControlException("access denied " + perm, perm);
+    }
+  }
+
+  @Override
+  public void checkPermission(Permission perm, Object context) {}
+
+  @Override
+  public void checkCreateClassLoader() {}
+
+  @Override
+  public void checkAccess(Thread t) {}
+
+  @Override
+  public void checkAccess(ThreadGroup g) {}
+
+  @Override
+  public void checkExit(int status) {}
+
+  @Override
+  public void checkExec(String cmd) {}
+
+  @Override
+  public void checkLink(String lib) {}
+
+  @Override
+  public void checkRead(FileDescriptor fd) {}
+
+  @Override
+  public void checkRead(String file) {}
+
+  @Override
+  public void checkRead(String file, Object context) {}
+
+  @Override
+  public void checkWrite(FileDescriptor fd) {}
+
+  @Override
+  public void checkWrite(String file) {}
+
+  @Override
+  public void checkDelete(String file) {}
+
+  @Override
+  public void checkConnect(String host, int port) {}
+
+  @Override
+  public void checkConnect(String host, int port, Object context) {}
+
+  @Override
+  public void checkListen(int port) {}
+
+  @Override
+  public void checkAccept(String host, int port) {}
+
+  @Override
+  public void checkMulticast(InetAddress maddr) {}
+
+  @Override
+  public void checkPropertiesAccess() {}
+
+  @Override
+  public void checkPropertyAccess(String key) {}
+
+  @Override
+  public void checkPrintJobAccess() {}
+
+  @Override
+  public void checkPackageAccess(String pkg) {
+    if (pkg.equals("sun.misc")) {
+      super.checkPackageAccess(pkg);
+    }
+  }
+
+  @Override
+  public void checkPackageDefinition(String pkg) {}
+
+  @Override
+  public void checkSetFactory() {}
+
+  @Override
+  public void checkSecurityAccess(String target) {}
+}

sdk/trace-shaded-deps/src/test/java/io/opentelemetry/sdk/trace/internal/SunMiscProhibitedSecurityManagerTest.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package io.opentelemetry.sdk.trace.internal;
+
+import static org.assertj.core.api.Assertions.assertThatNoException;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+
+import java.security.AccessControlException;
+import org.junit.jupiter.api.Test;
+
+class SunMiscProhibitedSecurityManagerTest {
+
+  @Test
+  public void checkPackageAccess_ProhibitsSunMisc() {
+    SunMiscProhibitedSecurityManager sm = new SunMiscProhibitedSecurityManager();
+    assertThatThrownBy(() -> sm.checkPackageAccess("sun.misc"))
+        .isInstanceOf(AccessControlException.class)
+        .hasMessage(
+            "access denied (\"java.lang.RuntimePermission\" \"accessClassInPackage.sun.misc\")");
+  }
+
+  @Test
+  public void checkPackageAccess_ProhibitsSunMiscRuntimePermission() {
+    SunMiscProhibitedSecurityManager sm = new SunMiscProhibitedSecurityManager();
+
+    assertThatThrownBy(
+            () -> sm.checkPermission(new RuntimePermission("accessClassInPackage.sun.misc")))
+        .isInstanceOf(AccessControlException.class)
+        .hasMessage(
+            "access denied (\"java.lang.RuntimePermission\" \"accessClassInPackage.sun.misc\")");
+  }
+
+  @Test
+  public void checkPackageAccess_AllowsOtherPackage() {
+    SunMiscProhibitedSecurityManager sm = new SunMiscProhibitedSecurityManager();
+    assertThatNoException().isThrownBy(() -> sm.checkPackageAccess("io.opentelemetry.sdk"));
+  }
+}