71 lines · c
1// RUN: %check_clang_tidy %s bugprone-not-null-terminated-result %t -- \2// RUN: -config="{CheckOptions: \3// RUN: {bugprone-not-null-terminated-result.WantToUseSafeFunction: true}}" \4// RUN: -- -I %S/Inputs/not-null-terminated-result5 6#include "not-null-terminated-result-c.h"7 8// The following is not defined therefore the safe functions are unavailable.9// #define __STDC_LIB_EXT1__ 110 11#define __STDC_WANT_LIB_EXT1__ 112 13//===----------------------------------------------------------------------===//14// memcpy() - destination array tests15//===----------------------------------------------------------------------===//16 17void bad_memcpy_not_just_char_dest(const char *src) {18 unsigned char dest00[13];19 memcpy(dest00, src, strlen(src));20 // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: the result from calling 'memcpy' is not null-terminated [bugprone-not-null-terminated-result]21 // CHECK-FIXES: unsigned char dest00[14];22 // CHECK-FIXES-NEXT: strcpy((char *)dest00, src);23}24 25void good_memcpy_not_just_char_dest(const char *src) {26 unsigned char dst00[14];27 strcpy((char *)dst00, src);28}29 30void bad_memcpy_known_dest(const char *src) {31 char dest01[13];32 memcpy(dest01, src, strlen(src));33 // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: the result from calling 'memcpy' is not null-terminated [bugprone-not-null-terminated-result]34 // CHECK-FIXES: strcpy(dest01, src);35}36 37void good_memcpy_known_dest(const char *src) {38 char dst01[13];39 strcpy(dst01, src);40}41 42//===----------------------------------------------------------------------===//43// memcpy() - length tests44//===----------------------------------------------------------------------===//45 46void bad_memcpy_full_source_length(const char *src) {47 char dest20[13];48 memcpy(dest20, src, strlen(src));49 // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: the result from calling 'memcpy' is not null-terminated [bugprone-not-null-terminated-result]50 // CHECK-FIXES: strcpy(dest20, src);51}52 53void good_memcpy_full_source_length(const char *src) {54 char dst20[13];55 strcpy(dst20, src);56}57 58void bad_memcpy_partial_source_length(const char *src) {59 char dest21[13];60 memcpy(dest21, src, strlen(src) - 1);61 // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: the result from calling 'memcpy' is not null-terminated [bugprone-not-null-terminated-result]62 // CHECK-FIXES: strncpy(dest21, src, strlen(src) - 1);63 // CHECK-FIXES-NEXT: dest21[strlen(src) - 1] = '\0';64}65 66void good_memcpy_partial_source_length(const char *src) {67 char dst21[13];68 strncpy(dst21, src, strlen(src) - 1);69 dst21[strlen(src) - 1] = '\0';70}71