1 // RUN: %check_clang_tidy %s cppcoreguidelines-no-malloc %t \ 2 // RUN: -config='{CheckOptions: \ 3 // RUN: [{key: cppcoreguidelines-no-malloc.Allocations, value: "::malloc;::align_malloc;::calloc"},\ 4 // RUN: {key: cppcoreguidelines-no-malloc.Reallocations, value: "::realloc;::align_realloc"},\ 5 // RUN: {key: cppcoreguidelines-no-malloc.Deallocations, value: "::free;::align_free"}]}' \ 6 // RUN: -- 7 8 using size_t = __SIZE_TYPE__; 9 10 void *malloc(size_t size); 11 void *align_malloc(size_t size, unsigned short alignment); 12 void *calloc(size_t num, size_t size); 13 void *realloc(void *ptr, size_t size); 14 void *align_realloc(void *ptr, size_t size, unsigned short alignment); 15 void free(void *ptr); 16 void *align_free(void *ptr); 17 18 void malloced_array() { 19 int *array0 = (int *)malloc(sizeof(int) * 20); 20 // CHECK-MESSAGES: :[[@LINE-1]]:24: warning: do not manage memory manually; consider a container or a smart pointer [cppcoreguidelines-no-malloc] 21 22 int *zeroed = (int *)calloc(20, sizeof(int)); 23 // CHECK-MESSAGES: :[[@LINE-1]]:24: warning: do not manage memory manually; consider a container or a smart pointer [cppcoreguidelines-no-malloc] 24 25 int *aligned = (int *)align_malloc(20 * sizeof(int), 16); 26 // CHECK-MESSAGES: :[[@LINE-1]]:25: warning: do not manage memory manually; consider a container or a smart pointer [cppcoreguidelines-no-malloc] 27 28 // reallocation memory, std::vector shall be used 29 char *realloced = (char *)realloc(array0, 50 * sizeof(int)); 30 // CHECK-MESSAGES: :[[@LINE-1]]:29: warning: do not manage memory manually; consider std::vector or std::string [cppcoreguidelines-no-malloc] 31 32 char *align_realloced = (char *)align_realloc(aligned, 50 * sizeof(int), 16); 33 // CHECK-MESSAGES: :[[@LINE-1]]:35: warning: do not manage memory manually; consider std::vector or std::string [cppcoreguidelines-no-malloc] 34 35 // freeing memory the bad way 36 free(realloced); 37 // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: do not manage memory manually; use RAII [cppcoreguidelines-no-malloc] 38 39 align_free(align_realloced); 40 // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: do not manage memory manually; use RAII [cppcoreguidelines-no-malloc] 41 42 // check if a call to malloc as function argument is found as well 43 free(malloc(20)); 44 // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: do not manage memory manually; use RAII [cppcoreguidelines-no-malloc] 45 // CHECK-MESSAGES: :[[@LINE-2]]:8: warning: do not manage memory manually; consider a container or a smart pointer [cppcoreguidelines-no-malloc] 46 } 47 48 /// newing an array is still not good, but not relevant to this checker 49 void newed_array() { 50 int *new_array = new int[10]; // OK(1) 51 } 52 53 void arbitrary_call() { 54 // we dont want every function to raise the warning even if malloc is in the name 55 malloced_array(); // OK(2) 56 57 // completely unrelated function call to malloc 58 newed_array(); // OK(3) 59 } 60