crimson/common/fatal_signal: Log error before collecting backtrace

Signed-off-by: Matan Breizman <[email protected]>

Author: Matan-B

src/crimson/common/fatal_signal.cc

@@ -95,6 +95,17 @@ void FatalSignal::install_oneshot_signal_handler()
   // about e.g. sigreturn(2) calling; see the man page).
   constexpr std::size_t FRAMES_TO_SKIP = 2 + 1;
 
+  // Let's inform regarding the abort before getting the stacktrace
+   std::string pre_backtrace = fmt::format(
+    "Aborting {} on shard {} - Stopping all shards",
+    cause,
+    seastar::engine_is_ready() ? std::to_string(seastar::this_shard_id()) : "no shard");
+
+  GENERIC_ERROR("{}", pre_backtrace);
+  std::cerr << pre_backtrace << std::flush;
+
+  seastar::engine().exit(1);
+
   std::string backtrace = fmt::format("{} on shard {}  \nBacktrace:\n {}",
     cause,
     seastar::engine_is_ready() ? std::to_string(seastar::this_shard_id()) : "no shard",