125 lines
2.7 KiB
C
125 lines
2.7 KiB
C
// RUN: %clang_cc1 -Wno-array-bounds -analyze -analyzer-checker=core,alpha.unix,alpha.security.ArrayBound -analyzer-store=region -verify %s
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typedef __typeof(sizeof(int)) size_t;
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void *malloc(size_t);
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void *calloc(size_t, size_t);
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char f1() {
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char* s = "abcd";
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char c = s[4]; // no-warning
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return s[5] + c; // expected-warning{{Access out-of-bound array element (buffer overflow)}}
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}
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void f2() {
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int *p = malloc(12);
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p[3] = 4; // expected-warning{{Access out-of-bound array element (buffer overflow)}}
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}
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struct three_words {
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int c[3];
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};
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struct seven_words {
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int c[7];
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};
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void f3() {
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struct three_words a, *p;
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p = &a;
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p[0] = a; // no-warning
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p[1] = a; // expected-warning{{Access out-of-bound array element (buffer overflow)}}
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}
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void f4() {
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struct seven_words c;
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struct three_words a, *p = (struct three_words *)&c;
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p[0] = a; // no-warning
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p[1] = a; // no-warning
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p[2] = a; // expected-warning{{Access out-of-bound array element (buffer overflow)}}
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}
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void f5() {
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char *p = calloc(2,2);
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p[3] = '.'; // no-warning
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p[4] = '!'; // expected-warning{{out-of-bound}}
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}
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void f6() {
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char a[2];
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int *b = (int*)a;
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b[1] = 3; // expected-warning{{out-of-bound}}
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}
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void f7() {
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struct three_words a;
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a.c[3] = 1; // expected-warning{{out-of-bound}}
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}
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void vla(int a) {
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if (a == 5) {
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int x[a];
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x[4] = 4; // no-warning
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x[5] = 5; // expected-warning{{out-of-bound}}
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}
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}
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void alloca_region(int a) {
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if (a == 5) {
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char *x = __builtin_alloca(a);
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x[4] = 4; // no-warning
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x[5] = 5; // expected-warning{{out-of-bound}}
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}
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}
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int symbolic_index(int a) {
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int x[2] = {1, 2};
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if (a == 2) {
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return x[a]; // expected-warning{{out-of-bound}}
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}
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return 0;
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}
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int symbolic_index2(int a) {
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int x[2] = {1, 2};
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if (a < 0) {
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return x[a]; // expected-warning{{out-of-bound}}
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}
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return 0;
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}
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int overflow_binary_search(double in) {
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int eee = 16;
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if (in < 1e-8 || in > 1e23) {
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return 0;
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} else {
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static const double ins[] = {1e-8, 1e-7, 1e-6, 1e-5, 1e-4, 1e-3, 1e-2, 1e-1,
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1e0, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7,
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1e8, 1e9, 1e10, 1e11, 1e12, 1e13, 1e14, 1e15,
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1e16, 1e17, 1e18, 1e19, 1e20, 1e21, 1e22};
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if (in < ins[eee]) {
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eee -= 8;
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} else {
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eee += 8;
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}
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if (in < ins[eee]) {
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eee -= 4;
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} else {
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eee += 4;
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}
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if (in < ins[eee]) {
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eee -= 2;
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} else {
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eee += 2;
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}
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if (in < ins[eee]) {
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eee -= 1;
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} else {
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eee += 1;
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}
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if (in < ins[eee]) { // expected-warning {{Access out-of-bound array element (buffer overflow)}}
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eee -= 1;
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}
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}
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return eee;
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}
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