cortexm, cortexar: Report malloc failures in target_description

Author: ALTracer

src/target/cortexar.c

@@ -1792,8 +1792,10 @@ static const char *cortexar_target_description(target_s *const target)
 	const size_t description_length =
 		cortexar_build_target_description(NULL, 0, target->target_options & TOPT_FLAVOUR_FLOAT) + 1U;
 	char *const description = malloc(description_length);
-	if (description)
-		(void)cortexar_build_target_description(
-			description, description_length, target->target_options & TOPT_FLAVOUR_FLOAT);
+	if (!description) { /* malloc failed: heap exhaustion */
+		DEBUG_ERROR("malloc: failed in %s\n", __func__);
+		return description;
+	}
+	cortexar_build_target_description(description, description_length, target->target_options & TOPT_FLAVOUR_FLOAT);
 	return description;
 }

src/target/cortexm.c

@@ -439,12 +439,14 @@ const char *cortexm_regs_description(target_s *target)
 	const size_t description_length =
 		(is_cortexmf ? create_tdesc_cortex_mf(NULL, 0) : create_tdesc_cortex_m(NULL, 0)) + 1U;
 	char *const description = malloc(description_length);
-	if (description) {
-		if (is_cortexmf)
-			create_tdesc_cortex_mf(description, description_length);
-		else
-			create_tdesc_cortex_m(description, description_length);
+	if (!description) { /* malloc failed: heap exhaustion */
+		DEBUG_ERROR("malloc: failed in %s\n", __func__);
+		return description;
 	}
+	if (is_cortexmf)
+		create_tdesc_cortex_mf(description, description_length);
+	else
+		create_tdesc_cortex_m(description, description_length);
 	return description;
 }