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llvm-project/clang/test/Analysis/malloc.c

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// RUN: %clang_cc1 -analyze -analyzer-checker=core,alpha.deadcode.UnreachableCode,alpha.core.CastSize,unix.Malloc,debug.ExprInspection -analyzer-store=region -verify %s
#include "system-header-simulator.h"
void clang_analyzer_eval(int);
typedef __typeof(sizeof(int)) size_t;
void *malloc(size_t);
void *valloc(size_t);
void free(void *);
void *realloc(void *ptr, size_t size);
void *reallocf(void *ptr, size_t size);
void *calloc(size_t nmemb, size_t size);
char *strdup(const char *s);
char *strndup(const char *s, size_t n);
void myfoo(int *p);
void myfooint(int p);
char *fooRetPtr();
void f1() {
int *p = malloc(12);
return; // expected-warning{{Memory is never released; potential leak of memory pointed to by 'p'}}
}
void f2() {
int *p = malloc(12);
free(p);
free(p); // expected-warning{{Attempt to free released memory}}
}
void f2_realloc_0() {
int *p = malloc(12);
realloc(p,0);
realloc(p,0); // expected-warning{{Attempt to free released memory}}
}
void f2_realloc_1() {
int *p = malloc(12);
int *q = realloc(p,0); // no-warning
}
void reallocNotNullPtr(unsigned sizeIn) {
unsigned size = 12;
char *p = (char*)malloc(size);
if (p) {
char *q = (char*)realloc(p, sizeIn);
char x = *q; // expected-warning {{Memory is never released; potential leak of memory pointed to by 'q'}}
}
}
int *realloctest1() {
int *q = malloc(12);
q = realloc(q, 20);
return q; // no warning - returning the allocated value
}
// p should be freed if realloc fails.
void reallocFails() {
char *p = malloc(12);
char *r = realloc(p, 12+1);
if (!r) {
free(p);
} else {
free(r);
}
}
void reallocSizeZero1() {
char *p = malloc(12);
char *r = realloc(p, 0);
if (!r) {
free(p); // expected-warning {{Attempt to free released memory}}
} else {
free(r);
}
}
void reallocSizeZero2() {
char *p = malloc(12);
char *r = realloc(p, 0);
if (!r) {
free(p); // expected-warning {{Attempt to free released memory}}
} else {
free(r);
}
free(p); // expected-warning {{Attempt to free released memory}}
}
void reallocSizeZero3() {
char *p = malloc(12);
char *r = realloc(p, 0);
free(r);
}
void reallocSizeZero4() {
char *r = realloc(0, 0);
free(r);
}
void reallocSizeZero5() {
char *r = realloc(0, 0);
}
void reallocPtrZero1() {
char *r = realloc(0, 12); // expected-warning {{Memory is never released; potential leak of memory pointed to by 'r'}}
}
void reallocPtrZero2() {
char *r = realloc(0, 12);
if (r)
free(r);
}
void reallocPtrZero3() {
char *r = realloc(0, 12);
free(r);
}
void reallocRadar6337483_1() {
char *buf = malloc(100);
buf = (char*)realloc(buf, 0x1000000);
if (!buf) {
return;// expected-warning {{Memory is never released; potential leak}}
}
free(buf);
}
void reallocRadar6337483_2() {
char *buf = malloc(100);
char *buf2 = (char*)realloc(buf, 0x1000000);
if (!buf2) { // expected-warning {{Memory is never released; potential leak}}
;
} else {
free(buf2);
}
}
void reallocRadar6337483_3() {
char * buf = malloc(100);
char * tmp;
tmp = (char*)realloc(buf, 0x1000000);
if (!tmp) {
free(buf);
return;
}
buf = tmp;
free(buf);
}
void reallocRadar6337483_4() {
char *buf = malloc(100);
char *buf2 = (char*)realloc(buf, 0x1000000);
if (!buf2) {
return; // expected-warning {{Memory is never released; potential leak}}
} else {
free(buf2);
}
}
int *reallocfTest1() {
int *q = malloc(12);
q = reallocf(q, 20);
return q; // no warning - returning the allocated value
}
void reallocfRadar6337483_4() {
char *buf = malloc(100);
char *buf2 = (char*)reallocf(buf, 0x1000000);
if (!buf2) {
return; // no warning - reallocf frees even on failure
} else {
free(buf2);
}
}
void reallocfRadar6337483_3() {
char * buf = malloc(100);
char * tmp;
tmp = (char*)reallocf(buf, 0x1000000);
if (!tmp) {
free(buf); // expected-warning {{Attempt to free released memory}}
return;
}
buf = tmp;
free(buf);
}
void reallocfPtrZero1() {
char *r = reallocf(0, 12); // expected-warning {{Memory is never released; potential leak}}
}
// This case tests that storing malloc'ed memory to a static variable which is
// then returned is not leaked. In the absence of known contracts for functions
// or inter-procedural analysis, this is a conservative answer.
int *f3() {
static int *p = 0;
p = malloc(12);
return p; // no-warning
}
// This case tests that storing malloc'ed memory to a static global variable
// which is then returned is not leaked. In the absence of known contracts for
// functions or inter-procedural analysis, this is a conservative answer.
static int *p_f4 = 0;
int *f4() {
p_f4 = malloc(12);
return p_f4; // no-warning
}
int *f5() {
int *q = malloc(12);
q = realloc(q, 20);
return q; // no-warning
}
void f6() {
int *p = malloc(12);
if (!p)
return; // no-warning
else
free(p);
}
void f6_realloc() {
int *p = malloc(12);
if (!p)
return; // no-warning
else
realloc(p,0);
}
char *doit2();
void pr6069() {
char *buf = doit2();
free(buf);
}
void pr6293() {
free(0);
}
void f7() {
char *x = (char*) malloc(4);
free(x);
x[0] = 'a'; // expected-warning{{Use of memory after it is freed}}
}
void f8() {
char *x = (char*) malloc(4);
free(x);
char *y = strndup(x, 4); // expected-warning{{Use of memory after it is freed}}
}
void f7_realloc() {
char *x = (char*) malloc(4);
realloc(x,0);
x[0] = 'a'; // expected-warning{{Use of memory after it is freed}}
}
void PR6123() {
int *x = malloc(11); // expected-warning{{Cast a region whose size is not a multiple of the destination type size}}
}
void PR7217() {
int *buf = malloc(2); // expected-warning{{Cast a region whose size is not a multiple of the destination type size}}
buf[1] = 'c'; // not crash
}
void mallocCastToVoid() {
void *p = malloc(2);
const void *cp = p; // not crash
free(p);
}
void mallocCastToFP() {
void *p = malloc(2);
void (*fp)() = p; // not crash
free(p);
}
// This tests that malloc() buffers are undefined by default
char mallocGarbage () {
char *buf = malloc(2);
char result = buf[1]; // expected-warning{{undefined}}
free(buf);
return result;
}
// This tests that calloc() buffers need to be freed
void callocNoFree () {
char *buf = calloc(2,2);
return; // expected-warning{{never released}}
}
// These test that calloc() buffers are zeroed by default
char callocZeroesGood () {
char *buf = calloc(2,2);
char result = buf[3]; // no-warning
if (buf[1] == 0) {
free(buf);
}
return result; // no-warning
}
char callocZeroesBad () {
char *buf = calloc(2,2);
char result = buf[3]; // no-warning
if (buf[1] != 0) {
free(buf); // expected-warning{{never executed}}
}
return result; // expected-warning{{never released}}
}
void nullFree() {
int *p = 0;
free(p); // no warning - a nop
}
void paramFree(int *p) {
myfoo(p);
free(p); // no warning
myfoo(p); // expected-warning {{Use of memory after it is freed}}
}
int* mallocEscapeRet() {
int *p = malloc(12);
return p; // no warning
}
void mallocEscapeFoo() {
int *p = malloc(12);
myfoo(p);
return; // no warning
}
void mallocEscapeFree() {
int *p = malloc(12);
myfoo(p);
free(p);
}
void mallocEscapeFreeFree() {
int *p = malloc(12);
myfoo(p);
free(p);
free(p); // expected-warning{{Attempt to free released memory}}
}
void mallocEscapeFreeUse() {
int *p = malloc(12);
myfoo(p);
free(p);
myfoo(p); // expected-warning{{Use of memory after it is freed}}
}
int *myalloc();
void myalloc2(int **p);
void mallocEscapeFreeCustomAlloc() {
int *p = malloc(12);
myfoo(p);
free(p);
p = myalloc();
free(p); // no warning
}
void mallocEscapeFreeCustomAlloc2() {
int *p = malloc(12);
myfoo(p);
free(p);
myalloc2(&p);
free(p); // no warning
}
void mallocBindFreeUse() {
int *x = malloc(12);
int *y = x;
free(y);
myfoo(x); // expected-warning{{Use of memory after it is freed}}
}
void mallocEscapeMalloc() {
int *p = malloc(12);
myfoo(p);
p = malloc(12); // expected-warning{{Memory is never released; potential leak}}
}
void mallocMalloc() {
int *p = malloc(12);
p = malloc(12); // expected-warning {{Memory is never released; potential leak}}
}
void mallocFreeMalloc() {
int *p = malloc(12);
free(p);
p = malloc(12);
free(p);
}
void mallocFreeUse_params() {
int *p = malloc(12);
free(p);
myfoo(p); //expected-warning{{Use of memory after it is freed}}
}
void mallocFreeUse_params2() {
int *p = malloc(12);
free(p);
myfooint(*p); //expected-warning{{Use of memory after it is freed}}
}
void mallocFailedOrNot() {
int *p = malloc(12);
if (!p)
free(p);
else
free(p);
}
struct StructWithInt {
int g;
};
int *mallocReturnFreed() {
int *p = malloc(12);
free(p);
return p; // expected-warning {{Use of memory after it is freed}}
}
int useAfterFreeStruct() {
struct StructWithInt *px= malloc(sizeof(struct StructWithInt));
px->g = 5;
free(px);
return px->g; // expected-warning {{Use of memory after it is freed}}
}
void nonSymbolAsFirstArg(int *pp, struct StructWithInt *p);
void mallocEscapeFooNonSymbolArg() {
struct StructWithInt *p = malloc(sizeof(struct StructWithInt));
nonSymbolAsFirstArg(&p->g, p);
return; // no warning
}
void mallocFailedOrNotLeak() {
int *p = malloc(12);
if (p == 0)
return; // no warning
else
return; // expected-warning {{Memory is never released; potential leak}}
}
void mallocAssignment() {
char *p = malloc(12);
p = fooRetPtr(); // expected-warning {{leak}}
}
int vallocTest() {
char *mem = valloc(12);
return 0; // expected-warning {{Memory is never released; potential leak}}
}
void vallocEscapeFreeUse() {
int *p = valloc(12);
myfoo(p);
free(p);
myfoo(p); // expected-warning{{Use of memory after it is freed}}
}
int *Gl;
struct GlStTy {
int *x;
};
struct GlStTy GlS = {0};
void GlobalFree() {
free(Gl);
}
void GlobalMalloc() {
Gl = malloc(12);
}
void GlobalStructMalloc() {
int *a = malloc(12);
GlS.x = a;
}
void GlobalStructMallocFree() {
int *a = malloc(12);
GlS.x = a;
free(GlS.x);
}
char *ArrayG[12];
void globalArrayTest() {
char *p = (char*)malloc(12);
ArrayG[0] = p;
}
// Make sure that we properly handle a pointer stored into a local struct/array.
typedef struct _StructWithPtr {
int *memP;
} StructWithPtr;
static StructWithPtr arrOfStructs[10];
void testMalloc() {
int *x = malloc(12);
StructWithPtr St;
St.memP = x;
arrOfStructs[0] = St; // no-warning
}
StructWithPtr testMalloc2() {
int *x = malloc(12);
StructWithPtr St;
St.memP = x;
return St; // no-warning
}
int *testMalloc3() {
int *x = malloc(12);
int *y = x;
return y; // no-warning
}
void testStructLeak() {
StructWithPtr St;
St.memP = malloc(12);
return; // expected-warning {{Memory is never released; potential leak of memory pointed to by 'St.memP'}}
}
void testElemRegion1() {
char *x = (void*)malloc(2);
int *ix = (int*)x;
free(&(x[0]));
}
void testElemRegion2(int **pp) {
int *p = malloc(12);
*pp = p;
free(pp[0]);
}
void testElemRegion3(int **pp) {
int *p = malloc(12);
*pp = p;
free(*pp);
}
// Region escape testing.
unsigned takePtrToPtr(int **p);
void PassTheAddrOfAllocatedData(int f) {
int *p = malloc(12);
// We don't know what happens after the call. Should stop tracking here.
if (takePtrToPtr(&p))
f++;
free(p); // no warning
}
struct X {
int *p;
};
unsigned takePtrToStruct(struct X *s);
int ** foo2(int *g, int f) {
int *p = malloc(12);
struct X *px= malloc(sizeof(struct X));
px->p = p;
// We don't know what happens after this call. Should not track px nor p.
if (takePtrToStruct(px))
f++;
free(p);
return 0;
}
struct X* RegInvalidationDetect1(struct X *s2) {
struct X *px= malloc(sizeof(struct X));
px->p = 0;
px = s2;
return px; // expected-warning {{Memory is never released; potential leak}}
}
struct X* RegInvalidationGiveUp1() {
int *p = malloc(12);
struct X *px= malloc(sizeof(struct X));
px->p = p;
return px;
}
int **RegInvalidationDetect2(int **pp) {
int *p = malloc(12);
pp = &p;
pp++;
return 0;// expected-warning {{Memory is never released; potential leak}}
}
extern void exit(int) __attribute__ ((__noreturn__));
void mallocExit(int *g) {
struct xx *p = malloc(12);
if (g != 0)
exit(1);
free(p);
return;
}
extern void __assert_fail (__const char *__assertion, __const char *__file,
unsigned int __line, __const char *__function)
__attribute__ ((__noreturn__));
#define assert(expr) \
((expr) ? (void)(0) : __assert_fail (#expr, __FILE__, __LINE__, __func__))
void mallocAssert(int *g) {
struct xx *p = malloc(12);
assert(g != 0);
free(p);
return;
}
void doNotInvalidateWhenPassedToSystemCalls(char *s) {
char *p = malloc(12);
strlen(p);
strcpy(p, s); // expected-warning {{leak}}
}
// Rely on the CString checker evaluation of the strcpy API to convey that the result of strcpy is equal to p.
void symbolLostWithStrcpy(char *s) {
char *p = malloc(12);
p = strcpy(p, s);
free(p);
}
// The same test as the one above, but with what is actually generated on a mac.
static __inline char *
__inline_strcpy_chk (char *restrict __dest, const char *restrict __src)
{
return __builtin___strcpy_chk (__dest, __src, __builtin_object_size (__dest, 2 > 1));
}
void symbolLostWithStrcpy_InlineStrcpyVersion(char *s) {
char *p = malloc(12);
p = ((__builtin_object_size (p, 0) != (size_t) -1) ? __builtin___strcpy_chk (p, s, __builtin_object_size (p, 2 > 1)) : __inline_strcpy_chk (p, s));
free(p);
}
// Here we are returning a pointer one past the allocated value. An idiom which
// can be used for implementing special malloc. The correct uses of this might
// be rare enough so that we could keep this as a warning.
static void *specialMalloc(int n){
int *p;
p = malloc( n+8 );
if( p ){
p[0] = n;
p++;
}
return p;
}
// Potentially, the user could free the struct by performing pointer arithmetic on the return value.
// This is a variation of the specialMalloc issue, though probably would be more rare in correct code.
int *specialMallocWithStruct() {
struct StructWithInt *px= malloc(sizeof(struct StructWithInt));
return &(px->g);
}
// Test various allocation/deallocation functions.
void testStrdup(const char *s, unsigned validIndex) {
char *s2 = strdup(s);
s2[validIndex + 1] = 'b';// expected-warning {{Memory is never released; potential leak}}
}
int testStrndup(const char *s, unsigned validIndex, unsigned size) {
char *s2 = strndup(s, size);
s2 [validIndex + 1] = 'b';
if (s2[validIndex] != 'a')
return 0;
else
return 1;// expected-warning {{Memory is never released; potential leak}}
}
void testStrdupContentIsDefined(const char *s, unsigned validIndex) {
char *s2 = strdup(s);
char result = s2[1];// no warning
free(s2);
}
// ----------------------------------------------------------------------------
// Test the system library functions to which the pointer can escape.
// This tests false positive suppression.
// For now, we assume memory passed to pthread_specific escapes.
// TODO: We could check that if a new pthread binding is set, the existing
// binding must be freed; otherwise, a memory leak can occur.
void testPthereadSpecificEscape(pthread_key_t key) {
void *buf = malloc(12);
pthread_setspecific(key, buf); // no warning
}
// PR12101: Test funopen().
static int releasePtr(void *_ctx) {
free(_ctx);
return 0;
}
FILE *useFunOpen() {
void *ctx = malloc(sizeof(int));
FILE *f = funopen(ctx, 0, 0, 0, releasePtr); // no warning
if (f == 0) {
free(ctx);
}
return f;
}
FILE *useFunOpenNoReleaseFunction() {
void *ctx = malloc(sizeof(int));
FILE *f = funopen(ctx, 0, 0, 0, 0);
if (f == 0) {
free(ctx);
}
return f; // expected-warning{{leak}}
}
static int readNothing(void *_ctx, char *buf, int size) {
return 0;
}
FILE *useFunOpenReadNoRelease() {
void *ctx = malloc(sizeof(int));
FILE *f = funopen(ctx, readNothing, 0, 0, 0);
if (f == 0) {
free(ctx);
}
return f; // expected-warning{{leak}}
}
// Test setbuf, setvbuf.
int my_main_no_warning() {
char *p = malloc(100);
setvbuf(stdout, p, 0, 100);
return 0;
}
int my_main_no_warning2() {
char *p = malloc(100);
setbuf(__stdoutp, p);
return 0;
}
int my_main_warn(FILE *f) {
char *p = malloc(100);
setvbuf(f, p, 0, 100);
return 0;// expected-warning {{leak}}
}
// <rdar://problem/10978247>.
// some people use stack allocated memory as an optimization to avoid
// a heap allocation for small work sizes. This tests the analyzer's
// understanding that the malloc'ed memory is not the same as stackBuffer.
void radar10978247(int myValueSize) {
char stackBuffer[128];
char *buffer;
if (myValueSize <= sizeof(stackBuffer))
buffer = stackBuffer;
else
buffer = malloc(myValueSize);
// do stuff with the buffer
if (buffer != stackBuffer)
free(buffer);
}
void radar10978247_positive(int myValueSize) {
char stackBuffer[128];
char *buffer;
if (myValueSize <= sizeof(stackBuffer))
buffer = stackBuffer;
else
buffer = malloc(myValueSize);
// do stuff with the buffer
if (buffer == stackBuffer) // expected-warning {{leak}}
return;
}
// <rdar://problem/11269741> Previously this triggered a false positive
// because malloc() is known to return uninitialized memory and the binding
// of 'o' to 'p->n' was not getting propertly handled. Now we report a leak.
struct rdar11269741_a_t {
struct rdar11269741_b_t {
int m;
} n;
};
int rdar11269741(struct rdar11269741_b_t o)
{
struct rdar11269741_a_t *p = (struct rdar11269741_a_t *) malloc(sizeof(*p));
p->n = o;
return p->n.m; // expected-warning {{leak}}
}
// Pointer arithmetic, returning an ElementRegion.
void *radar11329382(unsigned bl) {
void *ptr = malloc (16);
ptr = ptr + (2 - bl);
return ptr; // no warning
}
void __assert_rtn(const char *, const char *, int, const char *) __attribute__((__noreturn__));
int strcmp(const char *, const char *);
char *a (void);
void radar11270219(void) {
char *x = a(), *y = a();
(__builtin_expect(!(x && y), 0) ? __assert_rtn(__func__, "/Users/zaks/tmp/ex.c", 24, "x && y") : (void)0);
strcmp(x, y); // no warning
}
void radar_11358224_test_double_assign_ints_positive_2()
{
void *ptr = malloc(16);
ptr = ptr; // expected-warning {{leak}}
}
// Assume that functions which take a function pointer can free memory even if
// they are defined in system headers and take the const pointer to the
// allocated memory. (radar://11160612)
int const_ptr_and_callback(int, const char*, int n, void(*)(void*));
void r11160612_1() {
char *x = malloc(12);
const_ptr_and_callback(0, x, 12, free); // no - warning
}
// Null is passed as callback.
void r11160612_2() {
char *x = malloc(12);
const_ptr_and_callback(0, x, 12, 0); // expected-warning {{leak}}
}
// Callback is passed to a function defined in a system header.
void r11160612_4() {
char *x = malloc(12);
sqlite3_bind_text_my(0, x, 12, free); // no - warning
}
// Passing callbacks in a struct.
void r11160612_5(StWithCallback St) {
void *x = malloc(12);
dealocateMemWhenDoneByVal(x, St);
}
void r11160612_6(StWithCallback St) {
void *x = malloc(12);
dealocateMemWhenDoneByRef(&St, x);
}
int mySub(int, int);
int myAdd(int, int);
int fPtr(unsigned cond, int x) {
return (cond ? mySub : myAdd)(x, x);
}
// Test anti-aliasing.
void dependsOnValueOfPtr(int *g, unsigned f) {
int *p;
if (f) {
p = g;
} else {
p = malloc(12);
}
if (p != g)
free(p);
else
return; // no warning
return;
}
int CMPRegionHeapToStack() {
int x = 0;
int *x1 = malloc(8);
int *x2 = &x;
clang_analyzer_eval(x1 == x2); // expected-warning{{FALSE}}
free(x1);
return x;
}
int CMPRegionHeapToHeap2() {
int x = 0;
int *x1 = malloc(8);
int *x2 = malloc(8);
int *x4 = x1;
int *x5 = x2;
clang_analyzer_eval(x4 == x5); // expected-warning{{FALSE}}
free(x1);
free(x2);
return x;
}
int CMPRegionHeapToHeap() {
int x = 0;
int *x1 = malloc(8);
int *x4 = x1;
if (x1 == x4) {
free(x1);
return 5/x; // expected-warning{{Division by zero}}
}
return x;// expected-warning{{This statement is never executed}}
}
int HeapAssignment() {
int m = 0;
int *x = malloc(4);
int *y = x;
*x = 5;
clang_analyzer_eval(*x != *y); // expected-warning{{FALSE}}
free(x);
return 0;
}
int *retPtr();
int *retPtrMightAlias(int *x);
int cmpHeapAllocationToUnknown() {
int zero = 0;
int *yBefore = retPtr();
int *m = malloc(8);
int *yAfter = retPtrMightAlias(m);
clang_analyzer_eval(yBefore == m); // expected-warning{{FALSE}}
clang_analyzer_eval(yAfter == m); // expected-warning{{FALSE}}
free(m);
return 0;
}
void localArrayTest() {
char *p = (char*)malloc(12);
char *ArrayL[12];
ArrayL[0] = p; // expected-warning {{leak}}
}
void localStructTest() {
StructWithPtr St;
StructWithPtr *pSt = &St;
pSt->memP = malloc(12); // expected-warning{{Memory is never released; potential leak}}
}
// Test double assignment through integers.
static long glob;
void test_double_assign_ints()
{
void *ptr = malloc (16); // no-warning
glob = (long)(unsigned long)ptr;
}
void test_double_assign_ints_positive()
{
void *ptr = malloc(16);
(void*)(long)(unsigned long)ptr; // expected-warning {{unused}} expected-warning {{leak}}
}
void testCGContextNoLeak()
{
void *ptr = malloc(16);
CGContextRef context = CGBitmapContextCreate(ptr);
// Because you can get the data back out like this, even much later,
// CGBitmapContextCreate is one of our "stop-tracking" exceptions.
free(CGBitmapContextGetData(context));
}
void testCGContextLeak()
{
void *ptr = malloc(16);
CGContextRef context = CGBitmapContextCreate(ptr);
// However, this time we're just leaking the data, because the context
// object doesn't escape and it hasn't been freed in this function.
}
// Allow xpc context to escape. radar://11635258
// TODO: Would be great if we checked that the finalize_connection_context actually releases it.
static void finalize_connection_context(void *ctx) {
int *context = ctx;
free(context);
}
void foo (xpc_connection_t peer) {
int *ctx = calloc(1, sizeof(int));
xpc_connection_set_context(peer, ctx);
xpc_connection_set_finalizer_f(peer, finalize_connection_context);
xpc_connection_resume(peer);
}
// Make sure we catch errors when we free in a function which does not allocate memory.
void freeButNoMalloc(int *p, int x){
if (x) {
free(p);
//user forgot a return here.
}
free(p); // expected-warning {{Attempt to free released memory}}
}
struct HasPtr {
char *p;
};
char* reallocButNoMalloc(struct HasPtr *a, int c, int size) {
int *s;
char *b = realloc(a->p, size);
char *m = realloc(a->p, size); // expected-warning {{Attempt to free released memory}}
return a->p;
}
// We should not warn in this case since the caller will presumably free a->p in all cases.
int reallocButNoMallocPR13674(struct HasPtr *a, int c, int size) {
int *s;
char *b = realloc(a->p, size);
if (b == 0)
return -1;
a->p = b;
return 0;
}
// ----------------------------------------------------------------------------
// False negatives.
// TODO: This is another false negative.
void testMallocWithParam(int **p) {
*p = (int*) malloc(sizeof(int));
*p = 0;
}
void testMallocWithParam_2(int **p) {
*p = (int*) malloc(sizeof(int));
}
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