diff --git a/libmcount/mcount.c b/libmcount/mcount.c
index 8b7d3a828..9912c807e 100644
--- a/libmcount/mcount.c
+++ b/libmcount/mcount.c
@@ -740,7 +740,8 @@ static void segv_handler(int sig, siginfo_t *si, void *ctx)
 		rstack--;
 	}
 
-	pr_red("\nPlease report this bug to https://github.com/namhyung/uftrace/issues.\n\n");
+	pr_out("\n");
+	pr_red(BUG_REPORT_MSG);
 
 out:
 	sigaction(sig, &old_sigact[(sig == SIGSEGV)], NULL);
diff --git a/utils/utils.h b/utils/utils.h
index 7266098fd..0bdfd76b8 100644
--- a/utils/utils.h
+++ b/utils/utils.h
@@ -17,6 +17,7 @@
 #include <string.h>
 #include <ctype.h>
 #include <limits.h>
+#include <signal.h>
 
 #include "compiler.h"
 
@@ -44,6 +45,8 @@
 #define NSEC_PER_SEC  1000000000
 #define NSEC_PER_MSEC 1000000
 
+#define BUG_REPORT_MSG "Please report this bug to https://github.com/namhyung/uftrace/issues.\n\n"
+
 extern int debug;
 extern FILE *logfp;
 extern FILE *outfp;
@@ -369,4 +372,22 @@ char *absolute_dirname(const char *path, char *resolved_path);
 
 void stacktrace(void);
 
+#define ASSERT(cond) 							\
+	if (unlikely(!(cond))) { 					\
+		pr_red("%s:%d: %s: ASSERT `%s' failed.\n",		\
+			__FILE__, __LINE__, __func__, #cond);		\
+		stacktrace();						\
+		pr_red(BUG_REPORT_MSG);					\
+		raise(SIGTRAP);						\
+	}
+
+#define DASSERT(cond) 							\
+	if (DEBUG_MODE && unlikely(!(cond))) { 				\
+		pr_red("%s:%d: %s: DEBUG ASSERT `%s' failed.\n",	\
+			__FILE__, __LINE__, __func__, #cond);		\
+		stacktrace();						\
+		pr_red(BUG_REPORT_MSG);					\
+		raise(SIGTRAP);						\
+	}
+
 #endif /* UFTRACE_UTILS_H */