Let deadlock detector dump stack of potentially deadlocked threads

Enable cross-thread stack tracing as part of signal handler init
code in both storage and proton daemons.

Make deadlock detector parameters live configurable. Remove existing
`restart` config definition annotations to reflect this.

Remove dumping of bucket DB locks which hasn't really worked for a
long time now.

2 files changed, 7 insertions, 0 deletions

diff --git a/vespalib/src/vespa/vespalib/util/document_runnable.cpp b/vespalib/src/vespa/vespalib/util/document_runnable.cpp
index d7534514f41..c0af72dbbb1 100644
--- a/vespalib/src/vespa/vespalib/util/document_runnable.cpp
+++ b/vespalib/src/vespa/vespalib/util/document_runnable.cpp
@@ -72,6 +72,11 @@ bool Runnable::join() const
     return true;
 }
 
+FastOS_ThreadId Runnable::native_thread_id() const noexcept
+{
+    return GetThread()->GetThreadId();
+}
+
 void Runnable::Run(FastOS_ThreadInterface*, void*)
 {
     {
diff --git a/vespalib/src/vespa/vespalib/util/document_runnable.h b/vespalib/src/vespa/vespalib/util/document_runnable.h
index 5ca344ea7ef..89388bac34c 100644
--- a/vespalib/src/vespa/vespalib/util/document_runnable.h
+++ b/vespalib/src/vespa/vespalib/util/document_runnable.h
@@ -88,6 +88,8 @@ public:
      * Checks if runnable is running or not. (Started is considered running)
      */
     [[nodiscard]] bool running() const noexcept;
+
+    FastOS_ThreadId native_thread_id() const noexcept;
 };
 
 }