1 // RUN: %clang_cc1 -analyze -analyzer-checker=core,cplusplus.NewDelete -std=c++11 -fblocks -verify %s 2 // RUN: %clang_cc1 -analyze -analyzer-checker=core,cplusplus.NewDelete,cplusplus.NewDeleteLeaks -std=c++11 -DLEAKS -fblocks -verify %s 3 #include "Inputs/system-header-simulator-cxx.h" 4 #include "Inputs/system-header-simulator-objc.h" 5 6 typedef __typeof__(sizeof(int)) size_t; 7 extern "C" void *malloc(size_t); 8 extern "C" void *alloca(size_t); 9 extern "C" void free(void *); 10 11 //---------------------------------------------------------------------------- 12 // Check for intersections with unix.Malloc and unix.MallocWithAnnotations 13 // checkers bounded with cplusplus.NewDelete. 14 //---------------------------------------------------------------------------- 15 16 //----- malloc()/free() are subjects of unix.Malloc and unix.MallocWithAnnotations 17 void testMallocFreeNoWarn() { 18 int i; 19 free(&i); // no warn 20 21 int *p1 = (int *)malloc(sizeof(int)); 22 free(++p1); // no warn 23 24 int *p2 = (int *)malloc(sizeof(int)); 25 free(p2); 26 free(p2); // no warn 27 28 int *p3 = (int *)malloc(sizeof(int)); // no warn 29 30 int *p4 = (int *)malloc(sizeof(int)); 31 free(p4); 32 int j = *p4; // no warn 33 34 int *p5 = (int *)alloca(sizeof(int)); 35 free(p5); // no warn 36 } 37 38 void testDeleteMalloced() { 39 int *p1 = (int *)malloc(sizeof(int)); 40 delete p1; // no warn 41 42 int *p2 = (int *)__builtin_alloca(sizeof(int)); 43 delete p2; // no warn 44 } 45 46 void testUseZeroAllocatedMalloced() { 47 int *p1 = (int *)malloc(0); 48 *p1 = 1; // no warn 49 } 50 51 //----- Test free standard new 52 void testFreeOpNew() { 53 void *p = operator new(0); 54 free(p); 55 } 56 #ifdef LEAKS 57 // expected-warning@-2 {{Potential leak of memory pointed to by 'p'}} 58 #endif 59 60 void testFreeNewExpr() { 61 int *p = new int; 62 free(p); 63 } 64 #ifdef LEAKS 65 // expected-warning@-2 {{Potential leak of memory pointed to by 'p'}} 66 #endif 67 68 void testObjcFreeNewed() { 69 int *p = new int; 70 NSData *nsdata = [NSData dataWithBytesNoCopy:p length:sizeof(int) freeWhenDone:1]; 71 #ifdef LEAKS 72 // expected-warning@-2 {{Potential leak of memory pointed to by 'p'}} 73 #endif 74 } 75 76 void testFreeAfterDelete() { 77 int *p = new int; 78 delete p; 79 free(p); // expected-warning{{Use of memory after it is freed}} 80 } 81 82 void testStandardPlacementNewAfterDelete() { 83 int *p = new int; 84 delete p; 85 p = new(p) int; // expected-warning{{Use of memory after it is freed}} 86 } 87
