From 742e735d7f6c4ee9ca5a4d290c59d7d6ec1f7635 Mon Sep 17 00:00:00 2001
From: Aleksey Shipilev <shade@openjdk.org>
Date: Fri, 14 Feb 2025 13:53:06 +0000
Subject: [PATCH] 8349858: Print compilation task before blocking compiler
 thread for shutdown

Reviewed-by: kvn, chagedorn
---
 src/hotspot/share/compiler/compileBroker.cpp | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/hotspot/share/compiler/compileBroker.cpp b/src/hotspot/share/compiler/compileBroker.cpp
index c2e2e2d607f..c34d9eb785e 100644
--- a/src/hotspot/share/compiler/compileBroker.cpp
+++ b/src/hotspot/share/compiler/compileBroker.cpp
@@ -2074,7 +2074,21 @@ void CompileBroker::maybe_block() {
     if (PrintCompilation && (Verbose || WizardMode))
       tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current()));
 #endif
+    // If we are executing a task during the request to block, report the task
+    // before disappearing.
+    CompilerThread* thread = CompilerThread::current();
+    if (thread != nullptr) {
+      CompileTask* task = thread->task();
+      if (task != nullptr) {
+        if (PrintCompilation) {
+          task->print(tty, "blocked");
+        }
+        task->print_ul("blocked");
+      }
+    }
+    // Go to VM state and block for final VM shutdown safepoint.
     ThreadInVMfromNative tivfn(JavaThread::current());
+    assert(false, "Should never unblock from TIVNM entry");
   }
 }