add a DUK_USE_ERRHANDLER define

src/duk_api.c

@@ -3227,9 +3227,10 @@ void duk_throw(duk_context *ctx) {
 	 */
 
 	DUK_DDDPRINT("THROW ERROR (API): %!dT (before errhandler)", duk_get_tval(ctx, -1));
-
+#if defined(DUK_USE_ERRHANDLER)
 	duk_err_call_errhandler(thr);
 	DUK_DDDPRINT("THROW ERROR (API): %!dT (after errhandler)", duk_get_tval(ctx, -1));
+#endif
 
 	duk_err_setup_heap_ljstate(thr, DUK_LJ_TYPE_THROW);
 

src/duk_bi_thread.c

@@ -135,10 +135,12 @@ duk_ret_t duk_bi_thread_resume(duk_context *ctx) {
 	 *  from the resumee but this is not the case now.
 	 */
 
+#if defined(DUK_USE_ERRHANDLER)
 	if (is_error) {
 		DUK_ASSERT_TOP(ctx, 2);  /* value (error) is at stack top */
 		duk_err_call_errhandler(thr);  /* in resumer's context */
 	}
+#endif
 
 #ifdef DUK_USE_DEBUG  /* debug logging */
 	if (is_error) {
@@ -257,10 +259,12 @@ duk_ret_t duk_bi_thread_yield(duk_context *ctx) {
 	 *  and runs in the yielder's thread.
 	 */
 
+#if defined(DUK_USE_ERRHANDLER)
 	if (is_error) {
 		DUK_ASSERT_TOP(ctx, 1);  /* value (error) is at stack top */
 		duk_err_call_errhandler(thr);  /* in yielder's context */
 	}
+#endif
 
 #ifdef DUK_USE_DEBUG
 	if (is_error) {

src/duk_error.h

@@ -227,10 +227,12 @@ DUK_NORETURN(void duk_err_create_and_throw(duk_hthread *thr, duk_uint32_t code))
 
 DUK_NORETURN(void duk_error_throw_from_negative_rc(duk_hthread *thr, int rc));
 
-#ifdef DUK_USE_AUGMENT_ERRORS
+#if defined(DUK_USE_AUGMENT_ERRORS)
 void duk_err_augment_error(duk_hthread *thr, duk_hthread *thr_callstack, int err_index, const char *filename, int line, int noblame_fileline);
 #endif
+#if defined(DUK_USE_ERRHANDLER)
 void duk_err_call_errhandler(duk_hthread *thr);
+#endif
 
 DUK_NORETURN(void duk_err_longjmp(duk_hthread *thr));
 

src/duk_error_throw.c

@@ -45,6 +45,7 @@
  *  written after the errhandler finishes.
  */
 
+#if defined(DUK_USE_ERRHANDLER)
 void duk_err_call_errhandler(duk_hthread *thr) {
 	duk_context *ctx = (duk_context *) thr;
 	duk_tval *tv_hnd;
@@ -123,6 +124,7 @@ void duk_err_call_errhandler(duk_hthread *thr) {
 
 	/* [ ... errval ] */
 }
+#endif  /* DUK_USE_ERRHANDLER */
 
 /*
  *  Create and throw an error
@@ -203,8 +205,10 @@ void duk_err_create_and_throw(duk_hthread *thr, duk_uint32_t code) {
 	if (double_error || code == DUK_ERR_ALLOC_ERROR) {
 		DUK_DPRINT("alloc or double error: skip calling errhandler to avoid further trouble");
 	} else {
+#if defined(DUK_USE_ERRHANDLER)
 		DUK_DDDPRINT("THROW ERROR (INTERNAL): %!iT (before errhandler)", duk_get_tval(ctx, -1));
 		duk_err_call_errhandler(thr);
+#endif
 	}
 
 	/*

src/duk_features.h

@@ -1516,6 +1516,7 @@ typedef FILE duk_file;
 
 #define DUK_USE_AUGMENT_ERRORS
 #define DUK_USE_TRACEBACKS
+#define DUK_USE_ERRHANDLER
 #define DUK_USE_VERBOSE_ERRORS
 
 #if defined(DUK_OPT_NO_AUGMENT_ERRORS)

src/duk_js_executor.c

@@ -3336,8 +3336,10 @@ void duk_js_execute_bytecode(duk_hthread *entry_thread) {
 				duk_dup(ctx, b);
 				DUK_DDDPRINT("THROW ERROR (BYTECODE): %!dT (before errhandler)", duk_get_tval(ctx, -1));
 
+#if defined(DUK_USE_ERRHANDLER)
 				duk_err_call_errhandler(thr);
 				DUK_DDDPRINT("THROW ERROR (BYTECODE): %!dT (after errhandler)", duk_get_tval(ctx, -1));
+#endif
 
 				duk_err_setup_heap_ljstate(thr, DUK_LJ_TYPE_THROW);