8364004: Expose VMError::controlledCrash via Whitebox

Reviewed-by: kbarrett, mbaesken, dholmes

src/hotspot/share/prims/whitebox.cpp

@@ -102,6 +102,7 @@
 #include "utilities/macros.hpp"
 #include "utilities/nativeCallStack.hpp"
 #include "utilities/ostream.hpp"
+#include "utilities/vmError.hpp"
 #if INCLUDE_G1GC
 #include "gc/g1/g1Arguments.hpp"
 #include "gc/g1/g1CollectedHeap.inline.hpp"
@@ -2728,6 +2729,14 @@ WB_ENTRY(jlong, WB_Rss(JNIEnv* env, jobject o))
   return os::rss();
 WB_END
 
+WB_ENTRY(void, WB_ControlledCrash(JNIEnv* env, jobject o, jint how))
+#ifdef ASSERT
+  VMError::controlled_crash(how);
+#else
+  THROW_MSG(vmSymbols::java_lang_UnsupportedOperationException(), "Only available in debug builds");
+#endif
+WB_END
+
 #define CC (char*)
 
 static JNINativeMethod methods[] = {
@@ -3019,10 +3028,10 @@ static JNINativeMethod methods[] = {
   {CC"lockAndStuckInSafepoint", CC"()V", (void*)&WB_TakeLockAndHangInSafepoint},
   {CC"wordSize", CC"()J",                             (void*)&WB_WordSize},
   {CC"rootChunkWordSize", CC"()J",                    (void*)&WB_RootChunkWordSize},
-  {CC"isStatic", CC"()Z",                             (void*)&WB_IsStaticallyLinked}
+  {CC"isStatic", CC"()Z",                             (void*)&WB_IsStaticallyLinked},
+  {CC"controlledCrash",CC"(I)V",                      (void*)&WB_ControlledCrash},
 };
 
-
 #undef CC
 
 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))

test/hotspot/jtreg/runtime/ErrorHandling/ShowEventsOnCrashTest.java

@@ -30,11 +30,15 @@
  * @requires vm.flagless
  * @requires vm.debug == true & (os.family == "linux" | os.family == "windows")
  * @modules java.base/jdk.internal.misc
+ * @build jdk.test.whitebox.WhiteBox
+ * @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
  * @run driver ShowEventsOnCrashTest
  */
 
 // Note: this test can only run on debug since it relies on VMError::controlled_crash() which
 // only exists in debug builds.
+
+import jdk.test.whitebox.WhiteBox;
 import java.io.File;
 import java.util.regex.Pattern;
 
@@ -45,10 +49,17 @@ public class ShowEventsOnCrashTest {
 
     public static void main(String[] args) throws Exception {
 
+        if (args.length > 0 && args[0].equals("test")) {
+            Thread.sleep(2000); // Wait to accumulate log entries
+            WhiteBox.getWhiteBox().controlledCrash(2);
+            throw new RuntimeException("Still alive?");
+        }
+
         ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(
-            "-XX:+UnlockDiagnosticVMOptions", "-Xmx100M", "-XX:-CreateCoredumpOnCrash",
-            "-XX:ErrorHandlerTest=2",
-            "-version");
+            "-Xbootclasspath/a:.",
+            "-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI",
+            "-Xmx100M", "-XX:-CreateCoredumpOnCrash",
+            ShowEventsOnCrashTest.class.getName(), "test");
 
         OutputAnalyzer output_detail = new OutputAnalyzer(pb.start());
 

test/lib/jdk/test/whitebox/WhiteBox.java

@@ -851,4 +851,7 @@ public class WhiteBox {
   public native long rss();
 
   public native boolean isStatic();
+
+  // Force a controlled crash (debug builds only)
+  public native void controlledCrash(int how);
 }