NewDelete-intersections.mm revision 8e452e7d6ee00a7d12eb54b91498b59b6fefef4f 
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//int *global;
9
10//----------------------------------------------------------------------------
11// Check for intersections with unix.Malloc and unix.MallocWithAnnotations 
12// checkers bounded with cplusplus.NewDelete.
13//----------------------------------------------------------------------------
14
15// malloc()/free() are subjects of unix.Malloc and unix.MallocWithAnnotations
16void testMallocFreeNoWarn() {
17  int i;
18  free(&i); // no warn
19
20  int *p1 = (int *)malloc(sizeof(int));
21  free(++p1); // no warn
22
23  int *p2 = (int *)malloc(sizeof(int));
24  free(p2);
25  free(p2); // no warn
26
27  int *p3 = (int *)malloc(sizeof(int)); // no warn
28}
29
30//----- Test free standard new
31void testFreeOpNew() {
32  void *p = operator new(0);
33  free(p);
34} // expected-warning{{Memory is never released; potential leak}}
35// FIXME: Pointer should escape
36
37void testFreeNewExpr() {
38  int *p = new int;
39  free(p);
40} // expected-warning{{Memory is never released; potential leak}}
41// FIXME: Pointer should escape
42
43void testObjcFreeNewed() {
44  int *p = new int;
45  NSData *nsdata = [NSData dataWithBytesNoCopy:p length:sizeof(int) freeWhenDone:1]; // expected-warning{{Memory is never released; potential leak}}
46}
47// FIXME: Pointer should escape
48
49void testFreeAfterDelete() {
50  int *p = new int;  
51  delete p;
52  free(p); // expected-warning{{Use of memory after it is freed}}
53}
54
55void testStandardPlacementNewAfterDelete() {
56  int *p = new int;  
57  delete p;
58  p = new(p) int; // expected-warning{{Use of memory after it is freed}}
59}
60