зеркало из https://github.com/microsoft/clang-1.git
99 строки
2.4 KiB
C
99 строки
2.4 KiB
C
// RUN: %clang_cc1 -analyze -analyzer-checker=unix.Malloc -analyzer-ipa=inlining -analyzer-inline-max-stack-depth=5 -analyzer-inline-max-function-size=6 -analyzer-store=region -verify %s
|
|
|
|
#include "system-header-simulator.h"
|
|
|
|
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);
|
|
extern void exit(int) __attribute__ ((__noreturn__));
|
|
|
|
static void my_malloc1(void **d, size_t size) {
|
|
*d = malloc(size);
|
|
}
|
|
|
|
static void *my_malloc2(int elevel, size_t size) {
|
|
void *data;
|
|
data = malloc(size);
|
|
if (data == 0)
|
|
exit(0);
|
|
return data;
|
|
}
|
|
|
|
static void my_free1(void *p) {
|
|
free(p);
|
|
}
|
|
|
|
static void test1() {
|
|
void *data = 0;
|
|
my_malloc1(&data, 4); // expected-warning {{Memory is never released; potential leak of memory pointed to by 'data'}}
|
|
}
|
|
|
|
static void test11() {
|
|
void *data = 0;
|
|
my_malloc1(&data, 4);
|
|
my_free1(data);
|
|
}
|
|
|
|
static void testUniqueingByallocationSiteInTopLevelFunction() {
|
|
void *data = my_malloc2(1, 4);
|
|
data = 0;
|
|
int x = 5;// expected-warning {{Memory is never released; potential leak of memory pointed to by 'data'}}
|
|
data = my_malloc2(1, 4);// expected-warning {{Memory is never released; potential leak of memory pointed to by 'data'}}
|
|
}
|
|
|
|
static void test3() {
|
|
void *data = my_malloc2(1, 4);
|
|
free(data);
|
|
data = my_malloc2(1, 4);
|
|
free(data);
|
|
}
|
|
|
|
int test4() {
|
|
int *data = (int*)my_malloc2(1, 4);
|
|
my_free1(data);
|
|
data = (int *)my_malloc2(1, 4);
|
|
my_free1(data);
|
|
return *data; // expected-warning {{Use of memory after it is freed}}
|
|
}
|
|
|
|
void test6() {
|
|
int *data = (int *)my_malloc2(1, 4);
|
|
my_free1((int*)data);
|
|
my_free1((int*)data); // expected-warning{{Use of memory after it is freed}}
|
|
}
|
|
|
|
// TODO: We should warn here.
|
|
void test5() {
|
|
int *data;
|
|
my_free1((int*)data);
|
|
}
|
|
|
|
static char *reshape(char *in) {
|
|
return 0;
|
|
}
|
|
|
|
void testThatRemoveDeadBindingsRunBeforeEachCall() {
|
|
char *v = malloc(12);
|
|
v = reshape(v);
|
|
v = reshape(v);// expected-warning {{Memory is never released; potential leak of memory pointed to by 'v'}}
|
|
}
|
|
|
|
// Test that we keep processing after 'return;'
|
|
void fooWithEmptyReturn(int x) {
|
|
if (x)
|
|
return;
|
|
x++;
|
|
return;
|
|
}
|
|
|
|
int uafAndCallsFooWithEmptyReturn() {
|
|
int *x = (int*)malloc(12);
|
|
free(x);
|
|
fooWithEmptyReturn(12);
|
|
return *x; // expected-warning {{Use of memory after it is freed}}
|
|
}
|