diff --git a/Makefile b/Makefile
index a41ce764b..09a458ef0 100644
--- a/Makefile
+++ b/Makefile
@@ -85,9 +85,9 @@ LIB_LDFLAGS        = $(COMMON_LDFLAGS) $(LDFLAGS_$@) $(LDFLAGS_lib) -Wl,--no-und
 TEST_LDFLAGS       = $(COMMON_LDFLAGS) -L$(objdir)/libtraceevent -ltraceevent
 
 ifeq ($(DEBUG), 1)
-  COMMON_CFLAGS += -O0 -g -rdynamic
+  COMMON_CFLAGS += -O0 -g -DDEBUG_MODE=1 -rdynamic
 else
-  COMMON_CFLAGS += -O2 -g
+  COMMON_CFLAGS += -O2 -g -DDEBUG_MODE=0
 endif
 
 ifeq ($(TRACE), 1)
diff --git a/utils/utils.h b/utils/utils.h
index 7689344c7..d83e08930 100644
--- a/utils/utils.h
+++ b/utils/utils.h
@@ -376,4 +376,24 @@ void dump_stacktrace(void **buffer, int nptrs);
 		dump_stacktrace(buffer, nptrs);				\
 	} while (0)
 
+#define CHECK(cond) 							\
+	if (unlikely(!(cond))) { 					\
+		pr_red("%s:%d: %s: CHECK `%s' failed.\n",		\
+			__FILE__, __LINE__, __func__, #cond);		\
+		stacktrace();						\
+		pr_red("Please report this uftrace internal bug to " 	\
+		       "https://github.com/namhyung/uftrace/issues");	\
+		abort();						\
+	}
+
+#define DCHECK(cond) 							\
+	if (DEBUG_MODE && unlikely(!(cond))) { 				\
+		pr_red("%s:%d: %s: DCHECK `%s' failed.\n",		\
+			__FILE__, __LINE__, __func__, #cond);		\
+		stacktrace();						\
+		pr_red("Please report this uftrace internal bug to " 	\
+		       "https://github.com/namhyung/uftrace/issues");	\
+		abort();						\
+	}
+
 #endif /* UFTRACE_UTILS_H */