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