Add Java 24 compatibility and remove SecurityManager support

Java 24 degrades the SecurityManager into a hollow shell that just
throws exceptions. Later versions will remove the interface entirely.

This commit removes references to the SecurityManager from rules_scala,
which will make tests that call System.exit crash the worker.

It is often possible to edit code to avoid calling System.exit, and guarding
against it requires more effort in Java 24+, likely involving attaching
an agent. Until someone actually has that need, it doesn't seem worth doing.

Bazel is doing the same thing for now, see
bazelbuild/bazel#24354

Add -Dcom.google.testing.junit.runner.shouldInstallTestSecurityManager=false
for junit tests. While recent Bazel versions set this automatically,
older Bazel versions do not, and since we're removing the flag that allows
the SM, we need to set this to prevent crashing for people running older
Bazel versions with Java 17+

Also exclude the .ijwb directory from the buildifier lint check. Failures
due to those files are irritating when running the test locally.

Author: srdo-humio

scala/private/phases/phase_coverage.bzl

@@ -8,10 +8,6 @@ load(
     "//scala/private:coverage_replacements_provider.bzl",
     _coverage_replacements_provider = "coverage_replacements_provider",
 )
-load(
-    "//scala/private:rule_impls.bzl",
-    _allow_security_manager = "allow_security_manager",
-)
 
 def phase_coverage_library(ctx, p):
     args = struct(
@@ -64,7 +60,7 @@ def _phase_coverage(ctx, p, srcjars):
             outputs = [output_jar],
             executable = ctx.attr._code_coverage_instrumentation_worker.files_to_run,
             execution_requirements = {"supports-workers": "1"},
-            arguments = ["--jvm_flag=%s" % f for f in _allow_security_manager(ctx)] + [args],
+            arguments = [args],
         )
 
         replacements = {input_jar: output_jar}

scala/private/phases/phase_scalafmt.bzl

@@ -4,10 +4,6 @@
 # Outputs to format the scala files when it is explicitly specified
 #
 load("//scala/private:paths.bzl", _scala_extension = "scala_extension")
-load(
-    "//scala/private:rule_impls.bzl",
-    _allow_security_manager = "allow_security_manager",
-)
 
 def phase_scalafmt(ctx, p):
     if ctx.attr.format:
@@ -26,7 +22,7 @@ def _build_format(ctx):
     files = []
     srcs = []
     manifest_content = []
-    jvm_flags = ["-Dfile.encoding=UTF-8"] + _allow_security_manager(ctx)
+    jvm_flags = ["-Dfile.encoding=UTF-8"]
     for src in ctx.files.srcs:
         # only format scala source files, not generated files
         if src.path.endswith(_scala_extension) and src.is_source:

scala/private/phases/phase_write_executable.bzl

@@ -1,20 +1,19 @@
+load("//scala/private:common.bzl", "rlocationpath_from_file")
+
 #
 # PHASE: write executable
 #
 # DOCUMENT THIS
 #
 load(
     "//scala/private:rule_impls.bzl",
-    "allow_security_manager",
     "expand_location",
     "first_non_empty",
     "is_windows",
     "java_bin",
     "java_bin_windows",
     "runfiles_root",
-    "specified_java_runtime",
 )
-load("//scala/private:common.bzl", "rlocationpath_from_file")
 
 def phase_write_executable_scalatest(ctx, p):
     # jvm_flags passed in on the target override scala_test_jvm_flags passed in on the
@@ -29,7 +28,7 @@ def phase_write_executable_scalatest(ctx, p):
         jvm_flags = [
             "-DRULES_SCALA_MAIN_WS_NAME=%s" % ctx.workspace_name,
             "-DRULES_SCALA_ARGS_FILE=%s" % rlocationpath_from_file(ctx, p.runfiles.args_file),
-        ] + expand_location(ctx, final_jvm_flags) + _allow_security_manager_for_specified_java_runtime(ctx),
+        ] + expand_location(ctx, final_jvm_flags),
         use_jacoco = ctx.configuration.coverage_enabled,
     )
     return _phase_write_executable_default(ctx, p, args)
@@ -44,7 +43,7 @@ def phase_write_executable_repl(ctx, p):
 def phase_write_executable_junit_test(ctx, p):
     args = struct(
         rjars = p.coverage_runfiles.rjars,
-        jvm_flags = p.jvm_flags + ctx.attr.jvm_flags + _allow_security_manager_for_specified_java_runtime(ctx),
+        jvm_flags = p.jvm_flags + ctx.attr.jvm_flags + ["-Dcom.google.testing.junit.runner.shouldInstallTestSecurityManager=false"],
         main_class = "com.google.testing.junit.runner.BazelTestRunner",
         use_jacoco = ctx.configuration.coverage_enabled,
     )
@@ -186,13 +185,3 @@ def _jar_path_based_on_java_bin(ctx):
     java_bin_var = java_bin(ctx)
     jar_path = java_bin_var.rpartition("/")[0] + "/jar"
     return jar_path
-
-# Allow security manager for generated test executables if they will be run with jdk >= 17
-def _allow_security_manager_for_specified_java_runtime(ctx):
-    return allow_security_manager(
-        ctx,
-        specified_java_runtime(
-            ctx,
-            default_runtime = ctx.attr._java_runtime[java_common.JavaRuntimeInfo],
-        ),
-    )

scala/private/rule_impls.bzl

@@ -124,7 +124,7 @@ def compile_scala(
     # TODO: scalac worker is run with @bazel_tools//tools/jdk:runtime_toolchain_type
     # which is different from rules_java where compilation runtime is used from
     # @bazel_tools//tools/jdk:toolchain_type
-    final_scalac_jvm_flags = first_non_empty(scalac_jvm_flags, toolchain.scalac_jvm_flags) + allow_security_manager(ctx)
+    final_scalac_jvm_flags = first_non_empty(scalac_jvm_flags, toolchain.scalac_jvm_flags)
 
     ctx.actions.run(
         inputs = ins,
@@ -221,12 +221,3 @@ def java_bin_windows(ctx):
 
 def is_windows(ctx):
     return ctx.configuration.host_path_separator == ";"
-
-# Return a jvm flag allowing security manager for jdk runtime >= 17
-# If no runtime is supplied then runtime is taken from ctx.attr._java_host_runtime
-# This must be a runtime used in generated java_binary script (usually workers using SecurityManager)
-def allow_security_manager(ctx, runtime = None):
-    java_runtime = runtime if runtime else ctx.attr._java_host_runtime[java_common.JavaRuntimeInfo]
-
-    # Bazel 5.x doesn't have java_runtime.version defined
-    return ["-Djava.security.manager=allow"] if hasattr(java_runtime, "version") and java_runtime.version >= 17 else []

scala_proto/private/scala_proto_aspect.bzl

@@ -1,19 +1,18 @@
+load("@bazel_skylib//lib:dicts.bzl", "dicts")
 load("@rules_proto//proto:defs.bzl", "ProtoInfo")
 load("//scala/private:common.bzl", "write_manifest_file")
 load("//scala/private:dependency.bzl", "legacy_unclear_dependency_info_for_protobuf_scrooge")
+load("//scala/private:phases/api.bzl", "extras_phases", "run_aspect_phases")
 load(
     "//scala/private:rule_impls.bzl",
     "compile_scala",
     "specified_java_compile_toolchain",
-    _allow_security_manager = "allow_security_manager",
 )
 load("//scala/private/toolchain_deps:toolchain_deps.bzl", "find_deps_info_on")
 load(
     "//scala_proto/private:scala_proto_aspect_provider.bzl",
     "ScalaProtoAspectInfo",
 )
-load("//scala/private:phases/api.bzl", "extras_phases", "run_aspect_phases")
-load("@bazel_skylib//lib:dicts.bzl", "dicts")
 
 def _import_paths(proto, ctx):
     # Under Bazel 7.x, direct_sources from generated protos may still contain
@@ -77,7 +76,7 @@ def _generate_sources(ctx, toolchain, proto):
 
     ctx.actions.run(
         executable = toolchain.worker,
-        arguments = ["--jvm_flag=%s" % f for f in _allow_security_manager(ctx)] + [toolchain.worker_flags, args],
+        arguments = [toolchain.worker_flags, args],
         inputs = depset(transitive = [descriptors, toolchain.generators_jars]),
         outputs = outputs.values(),
         tools = [toolchain.protoc],

src/java/io/bazel/rulesscala/worker/Worker.java

@@ -9,10 +9,7 @@
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Paths;
-import java.security.Permission;
 import java.util.List;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
 
 /**
  * A base for JVM workers.
@@ -54,15 +51,6 @@ public static void workerMain(String workerArgs[], Interface workerInterface) th
 
   /** The main loop for persistent worker processes */
   private static void persistentWorkerMain(Interface workerInterface) {
-    System.setSecurityManager(
-        new SecurityManager() {
-          @Override
-          public void checkPermission(Permission permission) {
-            Matcher matcher = exitPattern.matcher(permission.getName());
-            if (matcher.find()) throw new ExitTrapped(Integer.parseInt(matcher.group(1)));
-          }
-        });
-
     InputStream stdin = System.in;
     PrintStream stdout = System.out;
     PrintStream stderr = System.err;
@@ -94,8 +82,6 @@ public void checkPermission(Permission permission) {
             String[] workerArgs = stringListToArray(request.getArgumentsList());
             String[] args = expandArgsIfArgsfile(workerArgs);
             workerInterface.work(args);
-          } catch (ExitTrapped e) {
-            code = e.code;
           } catch (Exception e) {
             if (e instanceof Interface.WorkerException) System.err.println(e.getMessage());
             else e.printStackTrace();
@@ -177,17 +163,6 @@ public void reset() {
     }
   }
 
-  static class ExitTrapped extends RuntimeException {
-    final int code;
-
-    ExitTrapped(int code) {
-      super();
-      this.code = code;
-    }
-  }
-
-  private static Pattern exitPattern = Pattern.compile("exitVM\\.(-?\\d+)");
-
   private static String[] stringListToArray(List<String> argList) {
     int numArgs = argList.size();
     String[] args = new String[numArgs];

src/java/io/bazel/rulesscala/worker/WorkerTest.java

@@ -214,9 +214,6 @@ public void testBufferWriteReadAndReset() throws Exception {
 
   @AfterClass
   public static void teardown() {
-    // Persistent workers install a security manager. We need to
-    // reset it here so that our own process can exit!
-    System.setSecurityManager(null);
   }
 
   // Copied/modified from Bazel's MoreAsserts

tools/BUILD

@@ -18,13 +18,19 @@ WARNINGS_CONFIG = [
 
 buildifier(
     name = "lint_check",
+    exclude_patterns = [
+        "./.ijwb/*",
+    ],
     lint_mode = "warn",
     lint_warnings = WARNINGS_CONFIG,
     mode = "check",
 )
 
 buildifier(
     name = "lint_fix",
+    exclude_patterns = [
+        "./.ijwb/*",
+    ],
     lint_mode = "fix",
     lint_warnings = WARNINGS_CONFIG,
     mode = "fix",

twitter_scrooge/twitter_scrooge.bzl

@@ -1,3 +1,4 @@
+load("@bazel_skylib//lib:dicts.bzl", "dicts")
 load(
     "//scala/private:common.bzl",
     "write_manifest_file",
@@ -8,13 +9,11 @@ load(
 )
 load(
     "//scala/private:rule_impls.bzl",
-    "allow_security_manager",
     "compile_java",
     "compile_scala",
 )
-load("//thrift:thrift_info.bzl", "ThriftInfo")
 load("//thrift:thrift.bzl", "merge_thrift_infos")
-load("@bazel_skylib//lib:dicts.bzl", "dicts")
+load("//thrift:thrift_info.bzl", "ThriftInfo")
 
 def _colon_paths(data):
     return ":".join([f.path for f in sorted(data)])
@@ -86,7 +85,7 @@ def _generate_jvm_code(ctx, label, compile_thrifts, include_thrifts, jar_output,
         # be correctly handled since the executable is a jvm app that will
         # consume the flags on startup.
         #arguments = ["--jvm_flag=%s" % flag for flag in ctx.attr.jvm_flags] +
-        arguments = ["--jvm_flag=%s" % f for f in allow_security_manager(ctx)] + ["@" + argfile.path],
+        arguments = ["@" + argfile.path],
     )
 
 def _compiled_jar_file(actions, scrooge_jar):