129 lines
2.8 KiB
C
129 lines
2.8 KiB
C
// RUN: %clang_analyze_cc1 -Wno-array-bounds -analyzer-store=region -verify %s \
|
|
// RUN: -analyzer-checker=core \
|
|
// RUN: -analyzer-checker=unix \
|
|
// RUN: -analyzer-checker=alpha.security.ArrayBound \
|
|
// RUN: -analyzer-config unix.DynamicMemoryModeling:Optimistic=true
|
|
|
|
typedef __typeof(sizeof(int)) size_t;
|
|
void *malloc(size_t);
|
|
void *calloc(size_t, size_t);
|
|
|
|
char f1() {
|
|
char* s = "abcd";
|
|
char c = s[4]; // no-warning
|
|
return s[5] + c; // expected-warning{{Access out-of-bound array element (buffer overflow)}}
|
|
}
|
|
|
|
void f2() {
|
|
int *p = malloc(12);
|
|
p[3] = 4; // expected-warning{{Access out-of-bound array element (buffer overflow)}}
|
|
}
|
|
|
|
struct three_words {
|
|
int c[3];
|
|
};
|
|
|
|
struct seven_words {
|
|
int c[7];
|
|
};
|
|
|
|
void f3() {
|
|
struct three_words a, *p;
|
|
p = &a;
|
|
p[0] = a; // no-warning
|
|
p[1] = a; // expected-warning{{Access out-of-bound array element (buffer overflow)}}
|
|
}
|
|
|
|
void f4() {
|
|
struct seven_words c;
|
|
struct three_words a, *p = (struct three_words *)&c;
|
|
p[0] = a; // no-warning
|
|
p[1] = a; // no-warning
|
|
p[2] = a; // expected-warning{{Access out-of-bound array element (buffer overflow)}}
|
|
}
|
|
|
|
void f5() {
|
|
char *p = calloc(2,2);
|
|
p[3] = '.'; // no-warning
|
|
p[4] = '!'; // expected-warning{{out-of-bound}}
|
|
}
|
|
|
|
void f6() {
|
|
char a[2];
|
|
int *b = (int*)a;
|
|
b[1] = 3; // expected-warning{{out-of-bound}}
|
|
}
|
|
|
|
void f7() {
|
|
struct three_words a;
|
|
a.c[3] = 1; // expected-warning{{out-of-bound}}
|
|
}
|
|
|
|
void vla(int a) {
|
|
if (a == 5) {
|
|
int x[a];
|
|
x[4] = 4; // no-warning
|
|
x[5] = 5; // expected-warning{{out-of-bound}}
|
|
}
|
|
}
|
|
|
|
void alloca_region(int a) {
|
|
if (a == 5) {
|
|
char *x = __builtin_alloca(a);
|
|
x[4] = 4; // no-warning
|
|
x[5] = 5; // expected-warning{{out-of-bound}}
|
|
}
|
|
}
|
|
|
|
int symbolic_index(int a) {
|
|
int x[2] = {1, 2};
|
|
if (a == 2) {
|
|
return x[a]; // expected-warning{{out-of-bound}}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int symbolic_index2(int a) {
|
|
int x[2] = {1, 2};
|
|
if (a < 0) {
|
|
return x[a]; // expected-warning{{out-of-bound}}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int overflow_binary_search(double in) {
|
|
int eee = 16;
|
|
if (in < 1e-8 || in > 1e23) {
|
|
return 0;
|
|
} else {
|
|
static const double ins[] = {1e-8, 1e-7, 1e-6, 1e-5, 1e-4, 1e-3, 1e-2, 1e-1,
|
|
1e0, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7,
|
|
1e8, 1e9, 1e10, 1e11, 1e12, 1e13, 1e14, 1e15,
|
|
1e16, 1e17, 1e18, 1e19, 1e20, 1e21, 1e22};
|
|
if (in < ins[eee]) {
|
|
eee -= 8;
|
|
} else {
|
|
eee += 8;
|
|
}
|
|
if (in < ins[eee]) {
|
|
eee -= 4;
|
|
} else {
|
|
eee += 4;
|
|
}
|
|
if (in < ins[eee]) {
|
|
eee -= 2;
|
|
} else {
|
|
eee += 2;
|
|
}
|
|
if (in < ins[eee]) {
|
|
eee -= 1;
|
|
} else {
|
|
eee += 1;
|
|
}
|
|
if (in < ins[eee]) { // expected-warning {{Access out-of-bound array element (buffer overflow)}}
|
|
eee -= 1;
|
|
}
|
|
}
|
|
return eee;
|
|
}
|