diff --git a/interfaces/innerkits/backtrace/fp_backtrace.cpp b/interfaces/innerkits/backtrace/fp_backtrace.cpp
index f654240edfae005b2dfbe3f0fb21dfc51454a025..90afe96a26d290273e088d46c909523c06a29673 100644
--- a/interfaces/innerkits/backtrace/fp_backtrace.cpp
+++ b/interfaces/innerkits/backtrace/fp_backtrace.cpp
@@ -70,12 +70,12 @@ bool FpBacktraceImpl::Init()
         ffrt_get_current_coroutine_stack(&stackBegin, &stackSize);
         DfxArk::Instance().InitArkFunction(ArkFunction::STEP_ARK);
     });
-    StackUtils::Instance().GetMainStackRange(mainStackBegin_, mainStackEnd_);
     maps_ = DfxMaps::Create(0, false);
     if (maps_ == nullptr) {
         DFXLOGI("failed creat maps");
         return false;
     }
+    maps_->GetStackRange(mainStackBegin_, mainStackEnd_);
     return true;
 }
 
diff --git a/interfaces/innerkits/signal_handler/dfx_signal_handler.c b/interfaces/innerkits/signal_handler/dfx_signal_handler.c
index 5d58d50906447dd5e37567ca5c337148682eee46..8c7115730f56cff61b632685b6b6764161379959 100644
--- a/interfaces/innerkits/signal_handler/dfx_signal_handler.c
+++ b/interfaces/innerkits/signal_handler/dfx_signal_handler.c
@@ -391,7 +391,7 @@ static void DFX_InstallSignalHandler(void)
         for (size_t j = 0; j < sizeof(SIGCHAIN_CRASH_SIGNAL_LIST) / sizeof(SIGCHAIN_CRASH_SIGNAL_LIST[0]); j++) {
             sigdelset(&sigchain.sca_mask, SIGCHAIN_CRASH_SIGNAL_LIST[j]);
         }
-        add_special_handler_at_last(signo, &sigchain);
+        add_special_signal_handler(signo, &sigchain);
     }
     for (size_t i = 0; i < sizeof(SIGCHAIN_CRASH_SIGNAL_LIST) / sizeof(SIGCHAIN_CRASH_SIGNAL_LIST[0]); i++) {
         int32_t signo = SIGCHAIN_CRASH_SIGNAL_LIST[i];