On Tue, 29 Apr 2025 04:50:42 GMT, Ioi Lam <ik...@openjdk.org> wrote:
> This is the implementation of the draft [JEP: Ahead-of-time Command Line
> Ergonomics](https://bugs.openjdk.org/browse/JDK-8350022)
>
> - Implemented new flag `AOTCacheOutput`, which can be used to create an AOT
> cache using the "one-command workflow"
> - Added processing of the `AOT_TOOL_OPTIONS` environment variable that can
> supply extra VM options when creating an AOT cache
> - Added `%p` substitution for `AOTCache`, `AOTCacheOutput`, and
> `AOTConfiguration` options
>
> Please see the [JEP](https://bugs.openjdk.org/browse/JDK-8350022) and
> [CSR](https://bugs.openjdk.org/browse/JDK-8356010) for detailed specification.
>
> Examples:
>
>
> # Create an AOT cache with a single command:
> $ java -cp HelloWorld.jar -XX:AOTMode=record -XX:AOTCacheOutput=foo.aot
> HelloWorld
> Hello World
> Temporary AOTConfiguration recorded: foo.aot.config
> Launching child process /usr/bin/java to assemble AOT cache foo.aot using
> configuration foo.aot.config
> Picked up JAVA_TOOL_OPTIONS: -Djava.class.path=HelloWorld.jar
> -XX:AOTCacheOutput=foo.aot -XX:AOTConfiguration=foo.aot.config
> -XX:AOTMode=create
> Reading AOTConfiguration foo.aot.config and writing AOTCache foo.aot
> AOTCache creation is complete: foo.aot 10240000 bytes
>
> # Create logging file for the AOT cache assembly phase
> $ export AOT_TOOL_COMMAND=-Xlog:cds:file=log.txt
> $ java -cp HelloWorld.jar -XX:AOTMode=record -XX:AOTCacheOutput=foo.aot
> HelloWorld
>
>
> Note: the child process is launched with Java API because the HotSpot native
> APIs are not sufficient (no way to set env vars for child process).
Few comments.
JEP and CSR call env var :`JAVA_AOT_OPTIONS`. This description and changes call
it `AOT_TOOL_OPTIONS`. Please, fix.
src/hotspot/share/cds/metaspaceShared.cpp line 1068:
> 1066: }
> 1067:
> 1068: // Pass all arguments. These include those from JAVA_TOOL_OPTIONS and
> _JAVA_OPTIONS.
`_JAVA_OPTIONS`. Do you mean `JAVA_AOT_OPTIONS`?
src/hotspot/share/cds/metaspaceShared.cpp line 1071:
> 1069: for (int i = 0; i < Arguments::num_jvm_args(); i++) {
> 1070: const char* arg = Arguments::jvm_args_array()[i];
> 1071: if (strncmp("-XX:AOTMode", arg, 11) == 0) {
In arguments.cpp you do `strncmp("-XX:AOTMode=", arg, 12) == 0`. I think you
need to be consistent.
src/java.base/share/classes/jdk/internal/misc/CDS.java line 510:
> 508:
> 509: Map<String, String> env = pb.environment();
> 510: env.put("JAVA_TOOL_OPTIONS", sb.toString());
What about `JAVA_AOT_OPTIONS`?
-------------
PR Review: https://git.openjdk.org/jdk/pull/24942#pullrequestreview-2804218715
PR Comment: https://git.openjdk.org/jdk/pull/24942#issuecomment-2839405664
PR Review Comment: https://git.openjdk.org/jdk/pull/24942#discussion_r2066881980
PR Review Comment: https://git.openjdk.org/jdk/pull/24942#discussion_r2066888741
PR Review Comment: https://git.openjdk.org/jdk/pull/24942#discussion_r2066892210
