Use Serial GC with capped address space for linux-x86_64 binary

.github/workflows/build.yml

@@ -140,6 +140,8 @@ jobs:
           ulimit -a
           chmod +x ./bin/wave
           ./bin/wave --version
+          # must start with a virtual memory limit (#46)
+          for v in 2000000 1000000; do (ulimit -v $v && ./bin/wave --version); done
   release:
     name: Release
     if: "contains(github.event.head_commit.message, '[release]') && github.event.ref=='refs/heads/master'"

app/build.gradle

@@ -100,7 +100,10 @@ graalvmNative {
             configurationFileDirectories.from(file('conf'))
 
             if (System.env.getOrDefault("PLATFORM", "") == "linux-x86_64") {
-                buildArgs(['--static', '--libc=musl', '--gc=G1', '-march=compatibility'])
+                // Do not use G1: in a static musl image it calls getcpu via the legacy vsyscall page,
+                // which segfaults on kernels booted with vsyscall=none (e.g. WSL2). See #86.
+                // Cap the reserved heap address space instead, so it runs under `ulimit -v`. See #46.
+                buildArgs(['--static', '--libc=musl', '-march=compatibility', '-R:ReservedAddressSpaceSize=512m'])
             }
 
             javaLauncher = javaToolchains.launcherFor {