1 // RUN: %clang_cc1 -analyze -analyzer-checker=experimental.unix.MallocSizeof -verify %s 2 3 #include <stddef.h> 4 5 void *malloc(size_t size); 6 void *calloc(size_t nmemb, size_t size); 7 void *realloc(void *ptr, size_t size); 8 9 struct A {}; 10 struct B {}; 11 12 void foo() { 13 int *ip1 = malloc(sizeof(1)); 14 int *ip2 = malloc(4 * sizeof(int)); 15 16 long *lp1 = malloc(sizeof(short)); // expected-warning {{Result of 'malloc' is converted to type 'long *', whose pointee type 'long' is incompatible with sizeof operand type 'short'}} 17 long *lp2 = malloc(5 * sizeof(double)); // expected-warning {{Result of 'malloc' is converted to type 'long *', whose pointee type 'long' is incompatible with sizeof operand type 'double'}} 18 long *lp3 = malloc(5 * sizeof(char) + 2); // expected-warning {{Result of 'malloc' is converted to type 'long *', whose pointee type 'long' is incompatible with sizeof operand type 'char'}} 19 20 struct A *ap1 = calloc(1, sizeof(struct A)); 21 struct A *ap2 = calloc(2, sizeof(*ap1)); 22 struct A *ap3 = calloc(2, sizeof(ap1)); // expected-warning {{Result of 'calloc' is converted to type 'struct A *', whose pointee type 'struct A' is incompatible with sizeof operand type 'struct A *'}} 23 struct A *ap4 = calloc(3, sizeof(struct A*)); // expected-warning {{Result of 'calloc' is converted to type 'struct A *', whose pointee type 'struct A' is incompatible with sizeof operand type 'struct A *'}} 24 struct A *ap5 = calloc(4, sizeof(struct B)); // expected-warning {{Result of 'calloc' is converted to type 'struct A *', whose pointee type 'struct A' is incompatible with sizeof operand type 'struct B'}} 25 struct A *ap6 = realloc(ap5, sizeof(struct A)); 26 struct A *ap7 = realloc(ap5, sizeof(struct B)); // expected-warning {{Result of 'realloc' is converted to type 'struct A *', whose pointee type 'struct A' is incompatible with sizeof operand type 'struct B'}} 27 } 28
