forked from OSchip/llvm-project
917 lines
32 KiB
C
917 lines
32 KiB
C
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// Given code 'struct aa { char s1[4]; char * s2;} a; memcpy(a.s1, ...);',
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// this test checks that the CStringChecker only invalidates the destination buffer array a.s1 (instead of a.s1 and a.s2).
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// At the moment the whole of the destination array content is invalidated.
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// If a.s1 region has a symbolic offset, the whole region of 'a' is invalidated.
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// Specific triple set to test structures of size 0.
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// RUN: %clang_cc1 -triple x86_64-pc-linux-gnu -analyze -analyzer-checker=core,unix.Malloc,debug.ExprInspection -analyzer-store=region -verify %s
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typedef __typeof(sizeof(int)) size_t;
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char *strdup(const char *s);
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void free(void *);
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void *memcpy(void *dst, const void *src, size_t n); // expected-note{{passing argument to parameter 'dst' here}}
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void *malloc(size_t n);
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void clang_analyzer_eval(int);
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struct aa {
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char s1[4];
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char *s2;
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};
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// Test different types of structure initialisation.
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int f0() {
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struct aa a0 = {{1, 2, 3, 4}, 0};
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a0.s2 = strdup("hello");
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char input[] = {'a', 'b', 'c', 'd'};
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memcpy(a0.s1, input, 4);
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clang_analyzer_eval(a0.s1[0] == 'a'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(a0.s1[1] == 'b'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(a0.s1[2] == 'c'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(a0.s1[3] == 'd'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(a0.s2 == 0); // expected-warning{{UNKNOWN}}
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free(a0.s2); // no warning
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return 0;
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}
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int f1() {
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struct aa a1;
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a1.s2 = strdup("hello");
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char input[] = {'a', 'b', 'c', 'd'};
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memcpy(a1.s1, input, 4);
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clang_analyzer_eval(a1.s1[0] == 'a'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(a1.s1[1] == 'b'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(a1.s1[2] == 'c'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(a1.s1[3] == 'd'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(a1.s2 == 0); // expected-warning{{UNKNOWN}}
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free(a1.s2); // no warning
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return 0;
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}
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int f2() {
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struct aa a2 = {{1, 2}};
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a2.s2 = strdup("hello");
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char input[] = {'a', 'b', 'c', 'd'};
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memcpy(a2.s1, input, 4);
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clang_analyzer_eval(a2.s1[0] == 'a'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(a2.s1[1] == 'b'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(a2.s1[2] == 'c'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(a2.s1[3] == 'd'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(a2.s2 == 0); // expected-warning{{UNKNOWN}}
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free(a2.s2); // no warning
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return 0;
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}
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int f3() {
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struct aa a3 = {{1, 2, 3, 4}, 0};
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a3.s2 = strdup("hello");
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char input[] = {'a', 'b', 'c', 'd'};
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int * dest = (int*)a3.s1;
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memcpy(dest, input, 4);
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clang_analyzer_eval(a3.s1[0] == 'a'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(dest[0] == 'a'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(a3.s1[1] == 'b'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(dest[1] == 'b'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(a3.s1[2] == 'c'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(dest[2] == 'c'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(a3.s1[3] == 'd'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(dest[3] == 'd'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(a3.s2 == 0); // expected-warning{{UNKNOWN}}
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free(a3.s2); // no warning
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return 0;
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}
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struct bb {
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struct aa a;
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char * s2;
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};
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int f4() {
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struct bb b0 = {{1, 2, 3, 4}, 0};
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b0.s2 = strdup("hello");
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b0.a.s2 = strdup("hola");
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char input[] = {'a', 'b', 'c', 'd'};
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char * dest = (char*)(b0.a.s1);
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memcpy(dest, input, 4);
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clang_analyzer_eval(b0.a.s1[0] == 'a'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(dest[0] == 'a'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(b0.a.s1[1] == 'b'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(dest[1] == 'b'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(b0.a.s1[2] == 'c'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(dest[2] == 'c'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(b0.a.s1[3] == 'd'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(dest[3] == 'd'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(b0.s2 == 0); // expected-warning{{UNKNOWN}}
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free(b0.a.s2); // no warning
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free(b0.s2); // no warning
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return 0;
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}
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// Test that memory leaks are caught.
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int f5() {
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struct aa a0 = {{1, 2, 3, 4}, 0};
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a0.s2 = strdup("hello");
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char input[] = {'a', 'b', 'c', 'd'};
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memcpy(a0.s1, input, 4);
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return 0; // expected-warning{{Potential leak of memory pointed to by 'a0.s2'}}
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}
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int f6() {
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struct aa a1;
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a1.s2 = strdup("hello");
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char input[] = {'a', 'b', 'c', 'd'};
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memcpy(a1.s1, input, 4);
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return 0; // expected-warning{{Potential leak of memory pointed to by 'a1.s2'}}
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}
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int f7() {
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struct aa a2 = {{1, 2}};
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a2.s2 = strdup("hello");
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char input[] = {'a', 'b', 'c', 'd'};
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memcpy(a2.s1, input, 4);
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return 0; // expected-warning{{Potential leak of memory pointed to by 'a2.s2'}}
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}
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int f8() {
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struct aa a3 = {{1, 2, 3, 4}, 0};
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a3.s2 = strdup("hello");
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char input[] = {'a', 'b', 'c', 'd'};
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int * dest = (int*)a3.s1;
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memcpy(dest, input, 4);
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return 0; // expected-warning{{Potential leak of memory pointed to by 'a3.s2'}}
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}
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int f9() {
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struct bb b0 = {{1, 2, 3, 4}, 0};
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b0.s2 = strdup("hello");
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b0.a.s2 = strdup("hola");
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char input[] = {'a', 'b', 'c', 'd'};
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char * dest = (char*)(b0.a.s1);
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memcpy(dest, input, 4);
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free(b0.a.s2); // expected-warning{{Potential leak of memory pointed to by 'b0.s2'}}
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return 0;
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}
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int f10() {
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struct bb b0 = {{1, 2, 3, 4}, 0};
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b0.s2 = strdup("hello");
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b0.a.s2 = strdup("hola");
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char input[] = {'a', 'b', 'c', 'd'};
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char * dest = (char*)(b0.a.s1);
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memcpy(dest, input, 4);
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free(b0.s2); // expected-warning{{Potential leak of memory pointed to by 'b0.a.s2'}}
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return 0;
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}
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// Test invalidating fields being addresses of array.
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struct cc {
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char * s1;
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char * s2;
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};
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int f11() {
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char x[4] = {1, 2};
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x[0] = 1;
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x[1] = 2;
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struct cc c0;
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c0.s2 = strdup("hello");
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c0.s1 = &x[0];
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char input[] = {'a', 'b', 'c', 'd'};
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memcpy(c0.s1, input, 4);
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clang_analyzer_eval(x[0] == 1); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(x[1] == 2); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(c0.s1[0] == 'a'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(c0.s1[1] == 'b'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(c0.s1[2] == 'c'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(c0.s1[3] == 'd'); // expected-warning{{UNKNOWN}}
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free(c0.s2); // no-warning
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return 0;
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}
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// Test inverting field position between s1 and s2.
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struct dd {
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char *s2;
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char s1[4];
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};
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int f12() {
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struct dd d0 = {0, {1, 2, 3, 4}};
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d0.s2 = strdup("hello");
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char input[] = {'a', 'b', 'c', 'd'};
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memcpy(d0.s1, input, 4);
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clang_analyzer_eval(d0.s1[0] == 'a'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(d0.s1[1] == 'b'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(d0.s1[2] == 'c'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(d0.s1[3] == 'd'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(d0.s2 == 0); // expected-warning{{UNKNOWN}}
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free(d0.s2); // no warning
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return 0;
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}
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// Test arrays of structs.
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struct ee {
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int a;
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char b;
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};
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struct EE {
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struct ee s1[2];
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char * s2;
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};
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int f13() {
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struct EE E0 = {{{1, 2}, {3, 4}}, 0};
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E0.s2 = strdup("hello");
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char input[] = {'a', 'b', 'c', 'd'};
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memcpy(E0.s1, input, 4);
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clang_analyzer_eval(E0.s1[0].a == 'a'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(E0.s1[0].b == 'b'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(E0.s1[1].a == 'c'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(E0.s1[1].b == 'd'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(E0.s2 == 0); // expected-warning{{UNKNOWN}}
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free(E0.s2); // no warning
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return 0;
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}
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// Test global parameters.
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struct aa a15 = {{1, 2, 3, 4}, 0};
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int f15() {
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a15.s2 = strdup("hello");
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char input[] = {'a', 'b', 'c', 'd'};
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memcpy(a15.s1, input, 4);
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clang_analyzer_eval(a15.s1[0] == 'a'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(a15.s1[1] == 'b'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(a15.s1[2] == 'c'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(a15.s1[3] == 'd'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(a15.s2 == 0); // expected-warning{{UNKNOWN}}
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free(a15.s2); // no warning
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return 0;
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}
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// Test array of 0 sized elements.
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struct empty {};
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struct gg {
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struct empty s1[4];
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char * s2;
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};
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int f16() {
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struct gg g0 = {{}, 0};
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g0.s2 = strdup("hello");
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char input[] = {'a', 'b', 'c', 'd'};
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memcpy(g0.s1, input, 4);
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clang_analyzer_eval(*(int*)(&g0.s1[0]) == 'a'); // expected-warning{{UNKNOWN}}\
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expected-warning{{Potential leak of memory pointed to by 'g0.s2'}}
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clang_analyzer_eval(*(int*)(&g0.s1[1]) == 'b'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(*(int*)(&g0.s1[2]) == 'c'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(*(int*)(&g0.s1[3]) == 'd'); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(g0.s2 == 0); // expected-warning{{UNKNOWN}}
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free(g0.s2); // no warning
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return 0;
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}
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// Test array of 0 elements.
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struct hh {
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char s1[0];
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char * s2;
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};
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int f17() {
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struct hh h0;
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h0.s2 = strdup("hello");
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char input[] = {'a', 'b', 'c', 'd'};
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memcpy(h0.s1, input, 4);
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clang_analyzer_eval(h0.s1[0] == 'a'); // expected-warning{{UNKNOWN}}\
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expected-warning{{Potential leak of memory pointed to by 'h0.s2'}}
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clang_analyzer_eval(h0.s2 == 0); // expected-warning{{UNKNOWN}}
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free(h0.s2); // no warning
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return 0;
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}
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// Test writing past the array.
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struct ii {
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char s1[4];
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int i;
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int j;
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char * s2;
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};
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int f18() {
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struct ii i18 = {{1, 2, 3, 4}, 5, 6};
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i18.i = 10;
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i18.j = 11;
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i18.s2 = strdup("hello");
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char input[100] = {3};
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memcpy(i18.s1, input, 100);
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clang_analyzer_eval(i18.s1[0] == 1); // expected-warning{{UNKNOWN}}\
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expected-warning{{Potential leak of memory pointed to by 'i18.s2'}}
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clang_analyzer_eval(i18.s1[1] == 2); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(i18.s1[2] == 3); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(i18.s1[3] == 4); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(i18.i == 10); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(i18.j == 11); // expected-warning{{UNKNOWN}}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int f181() {
|
||
|
|
struct ii i181 = {{1, 2, 3, 4}, 5, 6};
|
||
|
|
i181.i = 10;
|
||
|
|
i181.j = 11;
|
||
|
|
i181.s2 = strdup("hello");
|
||
|
|
char input[100] = {3};
|
||
|
|
memcpy(i181.s1, input, 5); // invalidate the whole region of i181
|
||
|
|
clang_analyzer_eval(i181.s1[0] == 1); // expected-warning{{UNKNOWN}}\
|
||
|
|
expected-warning{{Potential leak of memory pointed to by 'i181.s2'}}
|
||
|
|
clang_analyzer_eval(i181.s1[1] == 2); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(i181.s1[2] == 3); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(i181.s1[3] == 4); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(i181.i == 10); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(i181.j == 11); // expected-warning{{UNKNOWN}}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Test array with a symbolic offset.
|
||
|
|
struct jj {
|
||
|
|
char s1[2];
|
||
|
|
char * s2;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct JJ {
|
||
|
|
struct jj s1[3];
|
||
|
|
char * s2;
|
||
|
|
};
|
||
|
|
|
||
|
|
int f19(int i) {
|
||
|
|
struct JJ J0 = {{{1, 2, 0}, {3, 4, 0}, {5, 6, 0}}, 0};
|
||
|
|
J0.s2 = strdup("hello");
|
||
|
|
J0.s1[0].s2 = strdup("hello");
|
||
|
|
J0.s1[1].s2 = strdup("hi");
|
||
|
|
J0.s1[2].s2 = strdup("world");
|
||
|
|
char input[2] = {'a', 'b'};
|
||
|
|
memcpy(J0.s1[i].s1, input, 2);
|
||
|
|
clang_analyzer_eval(J0.s1[0].s1[0] == 1); // expected-warning{{UNKNOWN}}\
|
||
|
|
expected-warning{{Potential leak of memory pointed to by field 's2'}}\
|
||
|
|
expected-warning{{Potential leak of memory pointed to by 'J0.s2'}}
|
||
|
|
clang_analyzer_eval(J0.s1[0].s1[1] == 2); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(J0.s1[1].s1[0] == 3); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(J0.s1[1].s1[1] == 4); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(J0.s1[2].s1[0] == 5); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(J0.s1[2].s1[1] == 6); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(J0.s1[i].s1[0] == 5); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(J0.s1[i].s1[1] == 6); // expected-warning{{UNKNOWN}}
|
||
|
|
// FIXME: memory leak warning for J0.s2 should be emitted here instead of after memcpy call.
|
||
|
|
return 0; // no warning
|
||
|
|
}
|
||
|
|
|
||
|
|
// Test array with its super region having symbolic offseted regions.
|
||
|
|
int f20(int i) {
|
||
|
|
struct aa * a20 = malloc(sizeof(struct aa) * 2);
|
||
|
|
a20[0].s1[0] = 1;
|
||
|
|
a20[0].s1[1] = 2;
|
||
|
|
a20[0].s1[2] = 3;
|
||
|
|
a20[0].s1[3] = 4;
|
||
|
|
a20[0].s2 = strdup("hello");
|
||
|
|
a20[1].s1[0] = 5;
|
||
|
|
a20[1].s1[1] = 6;
|
||
|
|
a20[1].s1[2] = 7;
|
||
|
|
a20[1].s1[3] = 8;
|
||
|
|
a20[1].s2 = strdup("world");
|
||
|
|
a20[i].s2 = strdup("hola");
|
||
|
|
char input[] = {'a', 'b', 'c', 'd'};
|
||
|
|
memcpy(a20[0].s1, input, 4);
|
||
|
|
clang_analyzer_eval(a20[0].s1[0] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a20[0].s1[1] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a20[0].s1[2] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a20[0].s1[3] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a20[0].s2 == 0); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a20[1].s1[0] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a20[1].s1[1] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a20[1].s1[2] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a20[1].s1[3] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a20[1].s2 == 0); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a20[i].s1[0] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a20[i].s1[1] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a20[i].s1[2] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a20[i].s1[3] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a20[i].s2 == 0); // expected-warning{{UNKNOWN}}\
|
||
|
|
expected-warning{{Potential leak of memory pointed to by 'a20'}}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Test array's region and super region both having symbolic offsets.
|
||
|
|
int f21(int i) {
|
||
|
|
struct aa * a21 = malloc(sizeof(struct aa) * 2);
|
||
|
|
a21[0].s1[0] = 1;
|
||
|
|
a21[0].s1[1] = 2;
|
||
|
|
a21[0].s1[2] = 3;
|
||
|
|
a21[0].s1[3] = 4;
|
||
|
|
a21[0].s2 = 0;
|
||
|
|
a21[1].s1[0] = 5;
|
||
|
|
a21[1].s1[1] = 6;
|
||
|
|
a21[1].s1[2] = 7;
|
||
|
|
a21[1].s1[3] = 8;
|
||
|
|
a21[1].s2 = 0;
|
||
|
|
a21[i].s2 = strdup("hello");
|
||
|
|
a21[i].s1[0] = 1;
|
||
|
|
a21[i].s1[1] = 2;
|
||
|
|
a21[i].s1[2] = 3;
|
||
|
|
a21[i].s1[3] = 4;
|
||
|
|
char input[] = {'a', 'b', 'c', 'd'};
|
||
|
|
memcpy(a21[i].s1, input, 4);
|
||
|
|
clang_analyzer_eval(a21[0].s1[0] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a21[0].s1[1] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a21[0].s1[2] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a21[0].s1[3] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a21[0].s2 == 0); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a21[1].s1[0] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a21[1].s1[1] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a21[1].s1[2] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a21[1].s1[3] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a21[1].s2 == 0); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a21[i].s1[0] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a21[i].s1[1] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a21[i].s1[2] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a21[i].s1[3] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a21[i].s2 == 0); // expected-warning{{UNKNOWN}}\
|
||
|
|
expected-warning{{Potential leak of memory pointed to by 'a21'}}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Test regions aliasing other regions.
|
||
|
|
struct ll {
|
||
|
|
char s1[4];
|
||
|
|
char * s2;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct mm {
|
||
|
|
char s3[4];
|
||
|
|
char * s4;
|
||
|
|
};
|
||
|
|
|
||
|
|
int f24() {
|
||
|
|
struct ll l24 = {{1, 2, 3, 4}, 0};
|
||
|
|
struct mm * m24 = (struct mm *)&l24;
|
||
|
|
m24->s4 = strdup("hello");
|
||
|
|
char input[] = {1, 2, 3, 4};
|
||
|
|
memcpy(m24->s3, input, 4);
|
||
|
|
clang_analyzer_eval(m24->s3[0] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m24->s3[1] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m24->s3[2] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m24->s3[3] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(l24.s1[0] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(l24.s1[1] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(l24.s1[2] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(l24.s1[3] == 1); // expected-warning{{UNKNOWN}}\
|
||
|
|
expected-warning{{Potential leak of memory pointed to by field 's4'}}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Test region with potential aliasing and symbolic offsets.
|
||
|
|
// Store assumes no aliasing.
|
||
|
|
int f25(int i, int j, struct ll * l, struct mm * m) {
|
||
|
|
m->s4 = strdup("hola"); // m->s4 not tracked
|
||
|
|
m->s3[0] = 1;
|
||
|
|
m->s3[1] = 2;
|
||
|
|
m->s3[2] = 3;
|
||
|
|
m->s3[3] = 4;
|
||
|
|
m->s3[j] = 5; // invalidates m->s3
|
||
|
|
l->s2 = strdup("hello"); // l->s2 not tracked
|
||
|
|
l->s1[0] = 6;
|
||
|
|
l->s1[1] = 7;
|
||
|
|
l->s1[2] = 8;
|
||
|
|
l->s1[3] = 9;
|
||
|
|
l->s1[i] = 10; // invalidates l->s1
|
||
|
|
char input[] = {1, 2, 3, 4};
|
||
|
|
memcpy(m->s3, input, 4); // does not invalidate l->s1[i]
|
||
|
|
clang_analyzer_eval(m->s3[0] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m->s3[1] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m->s3[2] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m->s3[3] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m->s3[i] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m->s3[j] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(l->s1[0] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(l->s1[1] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(l->s1[2] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(l->s1[3] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(l->s1[i] == 1); // expected-warning{{FALSE}}
|
||
|
|
clang_analyzer_eval(l->s1[j] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Test size with symbolic size argument.
|
||
|
|
int f26(int i) {
|
||
|
|
struct aa a26 = {{1, 2, 3, 4}, 0};
|
||
|
|
a26.s2 = strdup("hello");
|
||
|
|
char input[] = {'a', 'b', 'c', 'd'};
|
||
|
|
memcpy(a26.s1, input, i); // i assumed in bound
|
||
|
|
clang_analyzer_eval(a26.s1[0] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a26.s1[1] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a26.s1[2] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a26.s1[3] == 1); // expected-warning{{UNKNOWN}}\
|
||
|
|
expected-warning{{Potential leak of memory pointed to by 'a26.s2'}}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Test sizeof as a size argument.
|
||
|
|
int f261() {
|
||
|
|
struct aa a261 = {{1, 2, 3, 4}, 0};
|
||
|
|
a261.s2 = strdup("hello");
|
||
|
|
char input[] = {'a', 'b', 'c', 'd'};
|
||
|
|
memcpy(a261.s1, input, sizeof(a261.s1));
|
||
|
|
clang_analyzer_eval(a261.s1[0] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a261.s1[1] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a261.s1[2] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a261.s1[3] == 1); // expected-warning{{UNKNOWN}}\
|
||
|
|
expected-warning{{Potential leak of memory pointed to by 'a261.s2'}}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Test negative size argument.
|
||
|
|
int f262() {
|
||
|
|
struct aa a262 = {{1, 2, 3, 4}, 0};
|
||
|
|
a262.s2 = strdup("hello");
|
||
|
|
char input[] = {'a', 'b', 'c', 'd'};
|
||
|
|
memcpy(a262.s1, input, -1);
|
||
|
|
clang_analyzer_eval(a262.s1[0] == 1); // expected-warning{{UNKNOWN}}\
|
||
|
|
expected-warning{{Potential leak of memory pointed to by 'a262.s2'}}
|
||
|
|
clang_analyzer_eval(a262.s1[1] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a262.s1[2] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(a262.s1[3] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Test size argument being an unknown value.
|
||
|
|
struct xx {
|
||
|
|
char s1[4];
|
||
|
|
char * s2;
|
||
|
|
};
|
||
|
|
|
||
|
|
int f263(int n, char * len) {
|
||
|
|
struct xx x263 = {0};
|
||
|
|
x263.s2 = strdup("hello");
|
||
|
|
char input[] = {'a', 'b', 'c', 'd'};
|
||
|
|
memcpy(x263.s1, input, *(len + n));
|
||
|
|
clang_analyzer_eval(x263.s1[0] == 0); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(x263.s1[1] == 0); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(x263.s1[2] == 0); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(x263.s1[3] == 0); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(x263.s2 == 0); // expected-warning{{UNKNOWN}}
|
||
|
|
return 0; // expected-warning{{Potential leak of memory pointed to by 'x263.s2'}}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
// Test casting regions with symbolic offseted sub regions.
|
||
|
|
int f27(int i) {
|
||
|
|
struct mm m27 = {{1, 2, 3, 4}, 0};
|
||
|
|
m27.s4 = strdup("hello");
|
||
|
|
m27.s3[i] = 5;
|
||
|
|
char input[] = {'a', 'b', 'c', 'd'};
|
||
|
|
memcpy(((struct ll*)(&m27))->s1, input, 4);
|
||
|
|
clang_analyzer_eval(m27.s3[0] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m27.s3[1] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m27.s3[2] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m27.s3[3] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m27.s3[i] == 1); // expected-warning{{UNKNOWN}}\
|
||
|
|
expected-warning{{Potential leak of memory pointed to by 'm27.s4'}}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int f28(int i, int j, int k, int l) {
|
||
|
|
struct mm m28[2];
|
||
|
|
m28[i].s4 = strdup("hello");
|
||
|
|
m28[j].s3[k] = 1;
|
||
|
|
struct ll * l28 = (struct ll*)(&m28[1]);
|
||
|
|
l28->s1[l] = 2;
|
||
|
|
char input[] = {'a', 'b', 'c', 'd'};
|
||
|
|
memcpy(l28->s1, input, 4);
|
||
|
|
clang_analyzer_eval(m28[0].s3[0] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m28[0].s3[1] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m28[0].s3[2] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m28[0].s3[3] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m28[1].s3[0] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m28[1].s3[1] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m28[1].s3[2] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m28[1].s3[3] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m28[i].s3[0] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m28[i].s3[1] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m28[i].s3[2] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m28[i].s3[3] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m28[j].s3[k] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(l28->s1[l] == 2); // expected-warning{{UNKNOWN}}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int f29(int i, int j, int k, int l, int m) {
|
||
|
|
struct mm m29[2];
|
||
|
|
m29[i].s4 = strdup("hello");
|
||
|
|
m29[j].s3[k] = 1;
|
||
|
|
struct ll * l29 = (struct ll*)(&m29[l]);
|
||
|
|
l29->s1[m] = 2;
|
||
|
|
char input[] = {'a', 'b', 'c', 'd'};
|
||
|
|
memcpy(l29->s1, input, 4);
|
||
|
|
clang_analyzer_eval(m29[0].s3[0] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m29[0].s3[1] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m29[0].s3[2] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m29[0].s3[3] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m29[1].s3[0] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m29[1].s3[1] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m29[1].s3[2] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m29[1].s3[3] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m29[i].s3[0] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m29[i].s3[1] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m29[i].s3[2] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m29[i].s3[3] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(m29[j].s3[k] == 1); // expected-warning{{TRUE}}\
|
||
|
|
expected-warning{{Potential leak of memory pointed to by field 's4'}}
|
||
|
|
clang_analyzer_eval(l29->s1[m] == 2); // expected-warning{{UNKNOWN}}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Test unions' fields.
|
||
|
|
union uu {
|
||
|
|
char x;
|
||
|
|
char s1[4];
|
||
|
|
};
|
||
|
|
|
||
|
|
int f30() {
|
||
|
|
union uu u30 = { .s1 = {1, 2, 3, 4}};
|
||
|
|
char input[] = {1, 2, 3, 4};
|
||
|
|
memcpy(u30.s1, input, 4);
|
||
|
|
clang_analyzer_eval(u30.s1[0] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(u30.s1[1] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(u30.s1[2] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(u30.s1[3] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(u30.x == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
struct kk {
|
||
|
|
union uu u;
|
||
|
|
char * s2;
|
||
|
|
};
|
||
|
|
|
||
|
|
int f31() {
|
||
|
|
struct kk k31;
|
||
|
|
k31.s2 = strdup("hello");
|
||
|
|
k31.u.x = 1;
|
||
|
|
char input[] = {'a', 'b', 'c', 'd'};
|
||
|
|
memcpy(k31.u.s1, input, 4);
|
||
|
|
clang_analyzer_eval(k31.u.s1[0] == 1); // expected-warning{{UNKNOWN}}\
|
||
|
|
expected-warning{{Potential leak of memory pointed to by 'k31.s2'}}
|
||
|
|
clang_analyzer_eval(k31.u.s1[1] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(k31.u.s1[2] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(k31.u.s1[3] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(k31.u.x == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
// FIXME: memory leak warning for k31.s2 should be emitted here.
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
union vv {
|
||
|
|
int x;
|
||
|
|
char * s2;
|
||
|
|
};
|
||
|
|
|
||
|
|
int f32() {
|
||
|
|
union vv v32;
|
||
|
|
v32.s2 = strdup("hello");
|
||
|
|
char input[] = {'a', 'b', 'c', 'd'};
|
||
|
|
memcpy(v32.s2, input, 4);
|
||
|
|
clang_analyzer_eval(v32.s2[0] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(v32.s2[1] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(v32.s2[2] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(v32.s2[3] == 1); // expected-warning{{UNKNOWN}}\
|
||
|
|
expected-warning{{Potential leak of memory pointed to by 'v32.s2'}}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
struct nn {
|
||
|
|
int s1;
|
||
|
|
int i;
|
||
|
|
int j;
|
||
|
|
int k;
|
||
|
|
char * s2;
|
||
|
|
};
|
||
|
|
|
||
|
|
// Test bad types to dest buffer.
|
||
|
|
int f33() {
|
||
|
|
struct nn n33 = {1, 2, 3, 4, 0};
|
||
|
|
n33.s2 = strdup("hello");
|
||
|
|
char input[] = {'a', 'b', 'c', 'd'};
|
||
|
|
memcpy(n33.s1, input, 4); // expected-warning{{incompatible integer to pointer conversion passing 'int' to parameter of type 'void *'}}
|
||
|
|
clang_analyzer_eval(n33.i == 2); // expected-warning{{TRUE}}
|
||
|
|
clang_analyzer_eval(n33.j == 3); // expected-warning{{TRUE}}
|
||
|
|
clang_analyzer_eval(n33.k == 4); // expected-warning{{TRUE}}
|
||
|
|
clang_analyzer_eval(((char*)(n33.s1))[0] == 1); // expected-warning{{UNKNOWN}}\
|
||
|
|
expected-warning{{cast to 'char *' from smaller integer type 'int'}}
|
||
|
|
clang_analyzer_eval(((char*)(n33.s1))[1] == 1); // expected-warning{{UNKNOWN}}\
|
||
|
|
expected-warning{{cast to 'char *' from smaller integer type 'int'}}
|
||
|
|
clang_analyzer_eval(((char*)(n33.s1))[2] == 1); // expected-warning{{UNKNOWN}}\
|
||
|
|
expected-warning{{cast to 'char *' from smaller integer type 'int'}}
|
||
|
|
clang_analyzer_eval(((char*)(n33.s1))[3] == 1); // expected-warning{{UNKNOWN}}\
|
||
|
|
expected-warning{{cast to 'char *' from smaller integer type 'int'}}
|
||
|
|
clang_analyzer_eval(n33.s2 == 0); //expected-warning{{UNKNOWN}}
|
||
|
|
return 0; // expected-warning{{Potential leak of memory pointed to by 'n33.s2'}}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Test destination buffer being an unknown value.
|
||
|
|
struct ww {
|
||
|
|
int s1[4];
|
||
|
|
char s2;
|
||
|
|
};
|
||
|
|
|
||
|
|
int f34(struct ww * w34, int n) {
|
||
|
|
w34->s2 = 3;
|
||
|
|
char input[] = {'a', 'b', 'c', 'd'};
|
||
|
|
memcpy(w34->s1 + n, input , 4);
|
||
|
|
clang_analyzer_eval(w34->s1[0] == 0); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(w34->s1[1] == 0); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(w34->s1[2] == 0); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(w34->s1[3] == 0); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(w34->s1[n] == 0); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(w34->s2 == 3); // expected-warning{{TRUE}}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Test dest buffer as an element region with a symbolic index and size parameter as a symbolic value.
|
||
|
|
struct yy {
|
||
|
|
char s1[4];
|
||
|
|
char * s2;
|
||
|
|
};
|
||
|
|
|
||
|
|
int f35(int i, int n) {
|
||
|
|
struct yy y35 = {{1, 2, 3, 4}, 0};
|
||
|
|
y35.s2 = strdup("hello");
|
||
|
|
char input[] = {'a', 'b', 'c', 'd'};
|
||
|
|
memcpy(&(y35.s1[i]), input, n);
|
||
|
|
clang_analyzer_eval(y35.s1[0] == 0); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(y35.s1[1] == 0); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(y35.s1[2] == 0); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(y35.s1[3] == 0); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(y35.s1[i] == 0); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(y35.s2 == 0); // expected-warning{{UNKNOWN}}
|
||
|
|
return 0; // expected-warning{{Potential leak of memory pointed to by 'y35.s2'}}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Test regions with negative offsets.
|
||
|
|
struct zz {
|
||
|
|
char s1[4];
|
||
|
|
int s2;
|
||
|
|
};
|
||
|
|
|
||
|
|
int f36(struct zz * z36) {
|
||
|
|
|
||
|
|
char input[] = {'a', 'b', 'c', 'd'};
|
||
|
|
z36->s1[0] = 0;
|
||
|
|
z36->s1[1] = 1;
|
||
|
|
z36->s1[2] = 2;
|
||
|
|
z36->s1[3] = 3;
|
||
|
|
z36->s2 = 10;
|
||
|
|
|
||
|
|
z36 = z36 - 1; // Decrement by 8 bytes (struct zz is 8 bytes).
|
||
|
|
|
||
|
|
z36->s1[0] = 4;
|
||
|
|
z36->s1[1] = 5;
|
||
|
|
z36->s1[2] = 6;
|
||
|
|
z36->s1[3] = 7;
|
||
|
|
z36->s2 = 11;
|
||
|
|
|
||
|
|
memcpy(z36->s1, input, 4);
|
||
|
|
|
||
|
|
clang_analyzer_eval(z36->s1[0] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(z36->s1[1] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(z36->s1[2] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(z36->s1[3] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(z36->s2 == 11); // expected-warning{{TRUE}}
|
||
|
|
|
||
|
|
z36 = z36 + 1; // Increment back.
|
||
|
|
|
||
|
|
clang_analyzer_eval(z36->s1[0] == 0); // expected-warning{{TRUE}}
|
||
|
|
clang_analyzer_eval(z36->s1[1] == 1); // expected-warning{{TRUE}}
|
||
|
|
clang_analyzer_eval(z36->s1[2] == 2); // expected-warning{{TRUE}}
|
||
|
|
clang_analyzer_eval(z36->s1[3] == 3); // expected-warning{{TRUE}}
|
||
|
|
clang_analyzer_eval(z36->s2 == 10); // expected-warning{{TRUE}}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int f37(struct zz * z37) {
|
||
|
|
|
||
|
|
char input[] = {'a', 'b', 'c', 'd'};
|
||
|
|
z37->s1[0] = 0;
|
||
|
|
z37->s1[1] = 1;
|
||
|
|
z37->s1[2] = 2;
|
||
|
|
z37->s1[3] = 3;
|
||
|
|
z37->s2 = 10;
|
||
|
|
|
||
|
|
z37 = (struct zz *)((char*)(z37) - 4); // Decrement by 4 bytes (struct zz is 8 bytes).
|
||
|
|
|
||
|
|
z37->s1[0] = 4;
|
||
|
|
z37->s1[1] = 5;
|
||
|
|
z37->s1[2] = 6;
|
||
|
|
z37->s1[3] = 7;
|
||
|
|
z37->s2 = 11;
|
||
|
|
|
||
|
|
memcpy(z37->s1, input, 4);
|
||
|
|
|
||
|
|
clang_analyzer_eval(z37->s1[0] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(z37->s1[1] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(z37->s1[2] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(z37->s1[3] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(z37->s2 == 11); // expected-warning{{TRUE}}
|
||
|
|
|
||
|
|
z37 = (struct zz *)((char*)(z37) + 4); // Increment back.
|
||
|
|
|
||
|
|
clang_analyzer_eval(z37->s1[0] == 11); // expected-warning{{TRUE}}
|
||
|
|
clang_analyzer_eval(z37->s1[1] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(z37->s1[2] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(z37->s1[3] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(z37->s2 == 10); // expected-warning{{TRUE}}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int f38(struct zz * z38) {
|
||
|
|
|
||
|
|
char input[] = {'a', 'b', 'c', 'd'};
|
||
|
|
z38->s1[0] = 0;
|
||
|
|
z38->s1[1] = 1;
|
||
|
|
z38->s1[2] = 2;
|
||
|
|
z38->s1[3] = 3;
|
||
|
|
z38->s2 = 10;
|
||
|
|
|
||
|
|
z38 = (struct zz *)((char*)(z38) - 2); // Decrement by 2 bytes (struct zz is 8 bytes).
|
||
|
|
|
||
|
|
z38->s1[0] = 4;
|
||
|
|
z38->s1[1] = 5;
|
||
|
|
z38->s1[2] = 6;
|
||
|
|
z38->s1[3] = 7;
|
||
|
|
z38->s2 = 11;
|
||
|
|
|
||
|
|
memcpy(z38->s1, input, 4);
|
||
|
|
|
||
|
|
clang_analyzer_eval(z38->s1[0] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(z38->s1[1] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(z38->s1[2] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(z38->s1[3] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(z38->s2 == 11); // expected-warning{{TRUE}}
|
||
|
|
|
||
|
|
z38 = (struct zz *)((char*)(z38) + 2); // Increment back.
|
||
|
|
|
||
|
|
clang_analyzer_eval(z38->s1[0] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(z38->s1[1] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(z38->s1[2] == 11); // expected-warning{{TRUE}}
|
||
|
|
clang_analyzer_eval(z38->s1[3] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(z38->s2 == 10); // expected-warning{{UNKNOWN}}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Test negative offsets with a different structure layout.
|
||
|
|
struct z0 {
|
||
|
|
int s2;
|
||
|
|
char s1[4];
|
||
|
|
};
|
||
|
|
|
||
|
|
int f39(struct z0 * d39) {
|
||
|
|
|
||
|
|
char input[] = {'a', 'b', 'c', 'd'};
|
||
|
|
d39->s1[0] = 0;
|
||
|
|
d39->s1[1] = 1;
|
||
|
|
d39->s1[2] = 2;
|
||
|
|
d39->s1[3] = 3;
|
||
|
|
d39->s2 = 10;
|
||
|
|
|
||
|
|
d39 = (struct z0 *)((char*)(d39) - 2); // Decrement by 2 bytes (struct z0 is 8 bytes).
|
||
|
|
|
||
|
|
d39->s1[0] = 4;
|
||
|
|
d39->s1[1] = 5;
|
||
|
|
d39->s1[2] = 6;
|
||
|
|
d39->s1[3] = 7;
|
||
|
|
d39->s2 = 11;
|
||
|
|
|
||
|
|
memcpy(d39->s1, input, 4);
|
||
|
|
|
||
|
|
clang_analyzer_eval(d39->s1[0] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(d39->s1[1] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(d39->s1[2] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(d39->s1[3] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(d39->s2 == 11); // expected-warning{{TRUE}}
|
||
|
|
|
||
|
|
d39 = (struct z0 *)((char*)(d39) + 2); // Increment back.
|
||
|
|
|
||
|
|
clang_analyzer_eval(d39->s1[0] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(d39->s1[1] == 1); // expected-warning{{UNKNOWN}}
|
||
|
|
clang_analyzer_eval(d39->s1[2] == 2); // expected-warning{{TRUE}}
|
||
|
|
clang_analyzer_eval(d39->s1[3] == 3); // expected-warning{{TRUE}}
|
||
|
|
// FIXME: d39->s2 should evaluate to at least UNKNOWN or FALSE,
|
||
|
|
// 'collectSubRegionBindings(...)' in RegionStore.cpp will need to
|
||
|
|
// handle a regions' upper boundary overflowing.
|
||
|
|
clang_analyzer_eval(d39->s2 == 10); // expected-warning{{TRUE}}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|