test: Improve "potential deadlock detected" exception message

2 files changed, 6 insertions, 2 deletions

diff --git a/src/sync.cpp b/src/sync.cpp
index e7ea731482..e69ff090c6 100644
--- a/src/sync.cpp
+++ b/src/sync.cpp
@@ -114,13 +114,17 @@ static void potential_deadlock_detected(const LockPair& mismatch, const LockStac
         }
         LogPrintf(" %s\n", i.second.ToString());
     }
+
+    std::string mutex_a, mutex_b;
     LogPrintf("Current lock order is:\n");
     for (const LockStackItem& i : s2) {
         if (i.first == mismatch.first) {
             LogPrintf(" (1)"); /* Continued */
+            mutex_a = i.second.Name();
         }
         if (i.first == mismatch.second) {
             LogPrintf(" (2)"); /* Continued */
+            mutex_b = i.second.Name();
         }
         LogPrintf(" %s\n", i.second.ToString());
     }
@@ -128,7 +132,7 @@ static void potential_deadlock_detected(const LockPair& mismatch, const LockStac
         tfm::format(std::cerr, "Assertion failed: detected inconsistent lock order at %s:%i, details in debug log.\n", __FILE__, __LINE__);
         abort();
     }
-    throw std::logic_error("potential deadlock detected");
+    throw std::logic_error(strprintf("potential deadlock detected: %s -> %s -> %s", mutex_b, mutex_a, mutex_b));
 }
 
 static void push_lock(void* c, const CLockLocation& locklocation)
diff --git a/src/test/sync_tests.cpp b/src/test/sync_tests.cpp
index 5c6c2ee38e..3ea8714f3a 100644
--- a/src/test/sync_tests.cpp
+++ b/src/test/sync_tests.cpp
@@ -18,7 +18,7 @@ void TestPotentialDeadLockDetected(MutexType& mutex1, MutexType& mutex2)
     try {
         LOCK2(mutex2, mutex1);
     } catch (const std::logic_error& e) {
-        BOOST_CHECK_EQUAL(e.what(), "potential deadlock detected");
+        BOOST_CHECK_EQUAL(e.what(), "potential deadlock detected: mutex1 -> mutex2 -> mutex1");
         error_thrown = true;
     }
     #ifdef DEBUG_LOCKORDER