[GR-68493] Web-image support for running espresso in web-image

PullRequest: graal/21778

Author: simongruenbacher

substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/thread/Target_java_lang_Thread.java

@@ -367,6 +367,7 @@ private static void yield0() {
         PlatformThreads.singleton().yieldCurrent();
     }
 
+    @Platforms(InternalPlatform.NATIVE_ONLY.class)
     @Substitute
     private static void sleepNanos0(long nanos) throws InterruptedException {
         // Virtual threads are handled in sleep()

web-image/src/com.oracle.svm.webimage/src/com/oracle/svm/webimage/WebImageSystemPropertiesSupport.java

@@ -57,12 +57,12 @@ protected String javaIoTmpdirValue() {
 
     @Override
     protected String osNameValue() {
-        return "Unknown";
+        return "Web Image";
     }
 
     @Override
     protected String osVersionValue() {
-        return "Unknown";
+        return "0.0";
     }
 
 }

web-image/src/com.oracle.svm.webimage/src/com/oracle/svm/webimage/substitute/system/WebImageJavaLangSubstitutions.java

@@ -59,6 +59,7 @@
 import com.oracle.svm.webimage.platform.WebImageJSPlatform;
 import com.oracle.svm.webimage.platform.WebImagePlatform;
 import com.oracle.svm.webimage.platform.WebImageWasmGCPlatform;
+import org.graalvm.nativeimage.ProcessProperties;
 
 /*
  * Checkstyle: stop method name check
@@ -232,7 +233,11 @@ private static void yield() {
     }
 
     @Substitute
-    private static void sleep(long millis) throws InterruptedException {
+    private static void sleep(long millis) {
+    }
+
+    @Substitute
+    private static void sleepNanos0(long nanos) {
     }
 
     @Substitute
@@ -257,6 +262,16 @@ public static Map<Thread, StackTraceElement[]> getAllStackTraces() {
     }
 }
 
+@TargetClass(className = "java.lang.VirtualThread")
+@SuppressWarnings("unused")
+final class Target_java_lang_VirtualThread_Web {
+    @Substitute
+    @SuppressWarnings("static-method")
+    private void runContinuation() {
+        throw new UnsupportedOperationException("VirtualThread.runContinuation");
+    }
+}
+
 @TargetClass(java.lang.System.class)
 @SuppressWarnings("unused")
 final class Target_java_lang_System_Web {
@@ -879,6 +894,29 @@ public static Logger getLogger(String name) {
     }
 }
 
+@TargetClass(className = "java.lang.ProcessHandleImpl")
+@SuppressWarnings("unused")
+final class Target_java_lang_ProcessHandleImpl_Web {
+
+    @Substitute
+    private static void initNative() {
+        // Do nothing. Native code only gathers some information about the underlying system.
+    }
+
+    @Substitute
+    private static long getCurrentPid0() {
+        return ProcessProperties.getProcessID();
+    }
+
+    @Substitute
+    private static long isAlive0(long pid) {
+        if (pid == ProcessProperties.getProcessID()) {
+            return 0L;
+        }
+        return -1L;
+    }
+}
+
 class IsLinux implements BooleanSupplier {
     @Override
     public boolean getAsBoolean() {

web-image/src/com.oracle.svm.webimage/src/com/oracle/svm/webimage/substitute/system/WebImageSunMiscSubstitutions.java

@@ -27,6 +27,7 @@
 import com.oracle.svm.core.annotate.Substitute;
 import com.oracle.svm.core.annotate.TargetClass;
 import com.oracle.svm.webimage.functionintrinsics.JSFunctionIntrinsics;
+import jdk.internal.misc.Signal;
 
 @TargetClass(className = "jdk.internal.misc.VM")
 @SuppressWarnings("unused")
@@ -56,6 +57,62 @@ public static long getNanoTimeAdjustment(long offsetInSeconds) {
     }
 }
 
+@TargetClass(className = "jdk.internal.misc.Signal")
+final class Target_jdk_internal_misc_Signal_Web {
+
+    /**
+     * Uses POSIX signal numbers. May be incomplete, extend as necessary.
+     * <p>
+     * Signals are not supported in Web Image, but instances of {@code Signal} may still exist, so
+     * this method must return something.
+     * <p>
+     * Signal numbers taken from {@code man 7 signal} for the intel architecture.
+     */
+    @Substitute
+    private static int findSignal0(String sigName) {
+        return switch (sigName) {
+            case "HUP" -> 1;
+            case "INT" -> 2;
+            case "QUIT" -> 3;
+            case "ILL" -> 4;
+            case "TRAP" -> 5;
+            case "ABRT" -> 6;
+            case "BUS" -> 7;
+            case "FPE" -> 8;
+            case "KILL" -> 9;
+            case "USR1" -> 10;
+            case "SEGV" -> 11;
+            case "USR2" -> 12;
+            case "PIPE" -> 13;
+            case "ALRM" -> 14;
+            case "TERM" -> 15;
+            case "STKFLT" -> 16;
+            case "CHLD" -> 17;
+            case "CONT" -> 18;
+            case "STOP" -> 19;
+            case "TSTP" -> 20;
+            case "TTIN" -> 21;
+            case "TTOU" -> 22;
+            case "URG" -> 23;
+            case "XCPU" -> 24;
+            case "XFSZ" -> 25;
+            case "VTALRM" -> 26;
+            case "PROF" -> 27;
+            case "WINCH" -> 28;
+            case "IO" -> 29;
+            case "PWR" -> 30;
+            case "SYS" -> 31;
+            default -> -1;
+        };
+    }
+
+    @Substitute
+    @SuppressWarnings("unused")
+    public static Signal.Handler handle(Signal sig, Signal.Handler handler) throws IllegalArgumentException {
+        throw new IllegalArgumentException("cannot register signal handles in webimage.");
+    }
+}
+
 /** Dummy class to have a class with the file's name. */
 public final class WebImageSunMiscSubstitutions {
 }