add guard variable in try-catch stmt to aviod exception not caught

deps/oblib/src/common/ob_smart_call.h

@@ -84,9 +84,12 @@ inline int call_with_new_stack(SContext& sctx)
       std::function<int()> f = [&]() {                                     \
         int ret = OB_SUCCESS;                                              \
         try {                                                              \
+          in_try_stmt = true;                                              \
           ret = func;                                                      \
+          in_try_stmt = false;                                             \
         } catch (OB_BASE_EXCEPTION & except) {                             \
           ret = except.get_errno();                                        \
+          in_try_stmt = false;                                             \
         }                                                                  \
         return ret;                                                        \
       };                                                                   \

deps/oblib/src/lib/coro/co_user_thread.h

@@ -294,9 +294,12 @@ int CoKThreadTemp<Thread>::start()
       Thread* thread = nullptr;
       if (OB_FAIL(create_thread(thread, [this, i] {
             try {
+              common::in_try_stmt = true;
               this->run(i);
+              common::in_try_stmt = false;
             } catch (common::OB_BASE_EXCEPTION& except) {
               UNUSED(except);
+              common::in_try_stmt = false;
             }
           }))) {
         break;

deps/oblib/src/lib/coro/thread.cpp

@@ -221,11 +221,14 @@ void* Thread::__th_start(void* arg)
           th->pid_ = getpid();
           th->tid_ = static_cast<pid_t>(syscall(__NR_gettid));
           try {
+            in_try_stmt = true;
             th->runnable_();
+            in_try_stmt = false;
           } catch (OB_BASE_EXCEPTION& except) {
             // we don't catch other exception because we don't know how to handle it
             _LOG_ERROR("Exception caught!!! errno = %d, exception info = %s", except.get_errno(), except.what());
             ret = OB_ERR_UNEXPECTED;
+            in_try_stmt = false;
           }
         }
       }

deps/oblib/src/lib/utility/ob_hang_fatal_error.cpp

@@ -23,6 +23,7 @@ void right_to_die_or_duty_to_live_c()
 
 namespace oceanbase {
 namespace common {
+RLOCAL(bool, in_try_stmt);
 
 // To die or to live, it's a problem.
 void right_to_die_or_duty_to_live()
@@ -35,7 +36,13 @@ void right_to_die_or_duty_to_live()
     sleep(120);
   }
 #else
-  throw OB_EXCEPTION<OB_ERR_UNEXPECTED>();
+  if (in_try_stmt) {
+    throw OB_EXCEPTION<OB_ERR_UNEXPECTED>();
+  } else {
+    while (true) {
+      sleep(5);
+    }
+  }
 #endif
 }
 

deps/oblib/src/lib/utility/ob_hang_fatal_error.h

@@ -14,11 +14,13 @@
 #define SRC_LIB_UTILITY_OB_HANG_FATAL_ERROR_H_
 
 #include <exception>
+#include "lib/coro/co_var.h"
 namespace oceanbase
 {
 namespace common
 {
 extern void right_to_die_or_duty_to_live();
+extern RLOCAL(bool, in_try_stmt);
 
 struct OB_BASE_EXCEPTION : public std::exception
 {