[Native Image] GraalVM for JDK 24 ignores manifest entry Enable-Native-Access

[zakkak]

Describe the Issue

GraalVM for JDK 24 ignores manifest entry Enable-Native-Access when compiling to native image, resulting in warnings. According to JEP 472:

You can add Enable-Native-Access: ALL-UNNAMED to the manifest of an executable JAR file, i.e., a JAR file that is launched via java -jar. (The only supported value for the Enable-Native-Access manifest entry is ALL-UNNAMED; other values cause an exception to be thrown.)

I would expect native-image to detect this entry and not throw warnings.

Using the latest version of GraalVM can resolve many issues.

• I tried with the latest version of GraalVM.

GraalVM Version

native-image 24 2025-03-18
GraalVM Runtime Environment GraalVM CE 24-dev+21.1 (build 24+21-jvmci-b01)
Substrate VM GraalVM CE 24-dev+21.1 (build 24+21, serial gc)

8a88c44

Operating System and Version

Linux fedora 6.11.5-300.fc41.x86_64

Build Command

$JAVA_HOME/bin/native-image --initialize-at-build-time=. -jar target/reproducer-1.0-SNAPSHOT.jar

Expected Behavior

Native build should build without any warnings.

Actual Behavior

Native build prints warnings:

WARNING: A restricted method in java.lang.System has been called
WARNING: java.lang.System::loadLibrary has been called by com.aayushatharva.brotli4j.Brotli4jLoader in an unnamed module (file:/home/zakkak/code/issue-reproducers/target/reproducer-1.0-SNAPSHOT.jar)
WARNING: Use --enable-native-access=ALL-UNNAMED to avoid a warning for callers in this module
WARNING: Restricted methods will be blocked in a future release unless native access is enabled

Steps to Reproduce

cd /tmp
git clone --branch 2024-11-01-jep472-manifest-ignored https://github.com/zakkak/issue-reproducers reproducers
cd reproducers
mvn package
# run in JVM (with no warnings)
$JAVA_HOME/java \
  -jar target/reproducer-1.0-SNAPSHOT.jar
# generate native-image
$JAVA_HOME/native-image \
  --no-fallback \
  --initialize-at-build-time=.  \
  -jar target/reproducer-1.0-SNAPSHOT.jar
# Build prints warning about native access

Additional Context

No response

Build Log Output and Error Messages

Build Log:

========================================================================================================================
GraalVM Native Image: Generating 'reproducer-1.0-SNAPSHOT' (executable)...
========================================================================================================================
[1/8] Initializing...                                                                                    (1.5s @ 0.14GB)
 Java version: 24+21, vendor version: GraalVM CE 24-dev+21.1
 Graal compiler: optimization level: 2, target machine: x86-64-v3
 C compiler: gcc (redhat, x86_64, 14.2.1)
 Garbage collector: Serial GC (max heap size: 80% of RAM)
 1 user-specific feature(s):
 - com.oracle.svm.thirdparty.gson.GsonFeature
------------------------------------------------------------------------------------------------------------------------
Build resources:
 - 26.49GB of memory (42.8% of 61.93GB system memory, determined at start)
 - 32 thread(s) (100.0% of 32 available processor(s), determined at start)
[2/8] Performing analysis...  [WARNING: A restricted method in java.lang.System has been called
WARNING: java.lang.System::loadLibrary has been called by com.aayushatharva.brotli4j.Brotli4jLoader in an unnamed module (file:/home/zakkak/code/issue-reproducers/target/reproducer-1.0-SNAPSHOT.jar)
WARNING: Use --enable-native-access=ALL-UNNAMED to avoid a warning for callers in this module
WARNING: Restricted methods will be blocked in a future release unless native access is enabled

****]                                                                     (2.1s @ 0.45GB)
    3,342 reachable types   (70.1% of    4,765 total)
    3,836 reachable fields  (42.9% of    8,952 total)
   15,604 reachable methods (44.1% of   35,401 total)
    1,034 types,     7 fields, and   140 methods registered for reflection
       57 types,    58 fields, and    52 methods registered for JNI access
        4 native libraries: dl, pthread, rt, z
[3/8] Building universe...                                                                               (0.6s @ 0.45GB)
[4/8] Parsing methods...      [*]                                                                        (0.4s @ 0.47GB)
[5/8] Inlining methods...     [***]                                                                      (0.2s @ 0.41GB)
[6/8] Compiling methods...    [**]                                                                       (2.5s @ 0.43GB)
[7/8] Laying out methods...   [*]                                                                        (0.7s @ 0.50GB)
[8/8] Creating image...       [*]                                                                        (0.7s @ 0.55GB)
   5.24MB (38.34%) for code area:     8,925 compilation units
   7.25MB (53.00%) for image heap:   95,542 objects and 55 resources
   1.19MB ( 8.67%) for other data
  13.68MB in total
------------------------------------------------------------------------------------------------------------------------
Top 10 origins of code area:                                Top 10 object types in image heap:
   3.91MB java.base                                            1.39MB byte[] for code metadata
 960.09kB svm.jar (Native Image)                               1.28MB byte[] for java.lang.String
 112.12kB java.logging                                       937.41kB java.lang.String
  75.44kB org.graalvm.nativeimage.base                       794.47kB java.lang.Class
  48.63kB jdk.proxy2                                         287.20kB com.oracle.svm.core.hub.DynamicHubCompanion
  38.81kB jdk.proxy1                                         275.33kB byte[] for general heap data
  26.34kB jdk.internal.vm.ci                                 261.28kB java.util.HashMap$Node
  20.08kB org.graalvm.collections                            208.43kB java.lang.Object[]
  11.92kB jdk.proxy3                                         186.57kB java.lang.String[]
   9.29kB jdk.graal.compiler                                 154.36kB byte[] for embedded resources
   2.31kB for 4 more packages                                  1.55MB for 953 more object types
------------------------------------------------------------------------------------------------------------------------
Recommendations:
 HEAP: Set max heap for improved and more predictable memory usage.
 CPU:  Enable more CPU features with '-march=native' for improved performance.
------------------------------------------------------------------------------------------------------------------------
                        0.4s (4.3% of total time) in 99 GCs | Peak RSS: 1.19GB | CPU load: 18.62
------------------------------------------------------------------------------------------------------------------------
Build artifacts:
 /home/zakkak/code/issue-reproducers/reproducer-1.0-SNAPSHOT (executable)
========================================================================================================================
Finished generating 'reproducer-1.0-SNAPSHOT' in 9.2s.