NewDelete-intersections.mm revision 6e22712b73ce5f0361355c9f2d0fa81b56722cd8 
1// RUN: %clang_cc1 -analyze -analyzer-checker=core,alpha.cplusplus.NewDelete -analyzer-store region -std=c++11 -fblocks -verify %s
2#include "Inputs/system-header-simulator-cxx.h"
3#include "Inputs/system-header-simulator-objc.h"
4
5typedef __typeof__(sizeof(int)) size_t;
6extern "C" void *malloc(size_t);
7extern "C" void free(void *);
8
9//----------------------------------------------------------------------------
10// Check for intersections with unix.Malloc and unix.MallocWithAnnotations 
11// checkers bounded with cplusplus.NewDelete.
12//----------------------------------------------------------------------------
13
14//----- malloc()/free() are subjects of unix.Malloc and unix.MallocWithAnnotations
15void testMallocFreeNoWarn() {
16  int i;
17  free(&i); // no warn
18
19  int *p1 = (int *)malloc(sizeof(int));
20  free(++p1); // no warn
21
22  int *p2 = (int *)malloc(sizeof(int));
23  free(p2);
24  free(p2); // no warn
25
26  int *p3 = (int *)malloc(sizeof(int)); // no warn
27
28  int *p4 = (int *)malloc(sizeof(int));
29  free(p4);
30  int j = *p4; // no warn
31}
32
33void testDeleteMalloced() {
34  int *p = (int *)malloc(sizeof(int));
35  delete p; // no warn
36} 
37
38//----- Test free standard new
39void testFreeOpNew() {
40  void *p = operator new(0);
41  free(p);
42} // expected-warning{{Memory is never released; potential leak}}
43
44void testFreeNewExpr() {
45  int *p = new int;
46  free(p);
47} // expected-warning{{Memory is never released; potential leak}}
48
49void testObjcFreeNewed() {
50  int *p = new int;
51  NSData *nsdata = [NSData dataWithBytesNoCopy:p length:sizeof(int) freeWhenDone:1]; // expected-warning{{Memory is never released; potential leak}}
52}
53
54void testFreeAfterDelete() {
55  int *p = new int;  
56  delete p;
57  free(p); // expected-warning{{Use of memory after it is freed}}
58}
59
60void testStandardPlacementNewAfterDelete() {
61  int *p = new int;  
62  delete p;
63  p = new(p) int; // expected-warning{{Use of memory after it is freed}}
64}
65