NewDelete-intersections.mm revision 70be6d8401a0b9b2570476ba976a3f67f849c137 
1// RUN: %clang_cc1 -analyze -analyzer-checker=core,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
29void testDeleteMalloced() {
30  int *p = (int *)malloc(sizeof(int));
31  delete p; // no warn
32} 
33
34// FIXME: Pointer should escape
35
36//----- Test free standard new
37void testFreeOpNew() {
38  void *p = operator new(0);
39  free(p);
40} // expected-warning{{Memory is never released; potential leak}}
41// FIXME: Pointer should escape
42
43void testFreeNewExpr() {
44  int *p = new int;
45  free(p);
46} // expected-warning{{Memory is never released; potential leak}}
47// FIXME: Pointer should escape
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// FIXME: Pointer should escape
54
55void testFreeAfterDelete() {
56  int *p = new int;  
57  delete p;
58  free(p); // expected-warning{{Use of memory after it is freed}}
59}
60
61void testStandardPlacementNewAfterDelete() {
62  int *p = new int;  
63  delete p;
64  p = new(p) int; // expected-warning{{Use of memory after it is freed}}
65}
66