| // RUN: %clang_analyze_cc1 -w -verify %s \ |
| // RUN: -analyzer-checker=core \ |
| // RUN: -analyzer-checker=unix.cstring.NullArg \ |
| // RUN: -analyzer-checker=alpha.unix.cstring \ |
| // RUN: -analyzer-checker=debug.ExprInspection |
| |
| #define NULL ((void *)0) |
| |
| typedef __typeof(sizeof(int)) size_t; |
| size_t strlcpy(char *dst, const char *src, size_t n); |
| size_t strlcat(char *dst, const char *src, size_t n); |
| size_t strlen(const char *s); |
| void clang_analyzer_eval(int); |
| |
| void f1() { |
| char overlap[] = "123456789"; |
| strlcpy(overlap, overlap + 1, 3); // expected-warning{{Arguments must not be overlapping buffers}} |
| } |
| |
| void f2() { |
| char buf[5]; |
| size_t len; |
| len = strlcpy(buf, "abcd", sizeof(buf)); // expected-no-warning |
| clang_analyzer_eval(len == 4); // expected-warning{{TRUE}} |
| len = strlcat(buf, "efgh", sizeof(buf)); // expected-no-warning |
| clang_analyzer_eval(len == 8); // expected-warning{{TRUE}} |
| } |
| |
| void f3() { |
| char dst[2]; |
| const char *src = "abdef"; |
| strlcpy(dst, src, 5); // expected-warning{{String copy function overflows the destination buffer}} |
| } |
| |
| void f4() { |
| strlcpy(NULL, "abcdef", 6); // expected-warning{{Null pointer passed as 1st argument to string copy function}} |
| } |
| |
| void f5() { |
| strlcat(NULL, "abcdef", 6); // expected-warning{{Null pointer passed as 1st argument to string concatenation function}} |
| } |
| |
| void f6() { |
| char buf[8]; |
| strlcpy(buf, "abc", 3); |
| size_t len = strlcat(buf, "defg", 4); |
| clang_analyzer_eval(len == 7); // expected-warning{{TRUE}} |
| } |
| |
| int f7() { |
| char buf[8]; |
| return strlcpy(buf, "1234567", 0); // no-crash |
| } |
| |
| void f8(){ |
| char buf[5]; |
| size_t len; |
| |
| // basic strlcpy |
| len = strlcpy(buf,"123", sizeof(buf)); |
| clang_analyzer_eval(len==3);// expected-warning{{TRUE}} |
| len = strlen(buf); |
| clang_analyzer_eval(len==3);// expected-warning{{TRUE}} |
| |
| // testing bounded strlcat |
| len = strlcat(buf,"456", sizeof(buf)); |
| clang_analyzer_eval(len==6);// expected-warning{{TRUE}} |
| len = strlen(buf); |
| clang_analyzer_eval(len==4);// expected-warning{{TRUE}} |
| |
| // testing strlcat with size==0 |
| len = strlcat(buf,"789", 0); |
| clang_analyzer_eval(len==7);// expected-warning{{TRUE}} |
| len = strlen(buf); |
| clang_analyzer_eval(len==4);// expected-warning{{TRUE}} |
| |
| // testing strlcpy with size==0 |
| len = strlcpy(buf,"123",0); |
| clang_analyzer_eval(len==3);// expected-warning{{TRUE}} |
| len = strlen(buf); |
| clang_analyzer_eval(len==4);// expected-warning{{TRUE}} |
| |
| } |
| |
| void f9(int unknown_size, char* unknown_src, char* unknown_dst){ |
| char buf[8]; |
| size_t len; |
| |
| len = strlcpy(buf,"abba",sizeof(buf)); |
| |
| clang_analyzer_eval(len==4);// expected-warning{{TRUE}} |
| clang_analyzer_eval(strlen(buf)==4);// expected-warning{{TRUE}} |
| |
| //size is unknown |
| len = strlcat(buf,"cd", unknown_size); |
| clang_analyzer_eval(len==6);// expected-warning{{TRUE}} |
| clang_analyzer_eval(strlen(buf)>=4);// expected-warning{{TRUE}} |
| |
| //dst is unknown |
| len = strlcpy(unknown_dst,"abbc",unknown_size); |
| clang_analyzer_eval(len==4);// expected-warning{{TRUE}} |
| clang_analyzer_eval(strlen(unknown_dst));// expected-warning{{UNKNOWN}} |
| |
| //src is unknown |
| len = strlcpy(buf,unknown_src, sizeof(buf)); |
| clang_analyzer_eval(len);// expected-warning{{UNKNOWN}} |
| clang_analyzer_eval(strlen(buf));// expected-warning{{UNKNOWN}} |
| |
| //src, dst is unknown |
| len = strlcpy(unknown_dst, unknown_src, unknown_size); |
| clang_analyzer_eval(len);// expected-warning{{UNKNOWN}} |
| clang_analyzer_eval(strlen(unknown_dst));// expected-warning{{UNKNOWN}} |
| |
| //size is unknown |
| len = strlcat(buf + 2, unknown_src + 1, sizeof(buf)); |
| // expected-warning@-1 {{String concatenation function overflows the destination buffer}} |
| } |
| |
| void f10(){ |
| char buf[8]; |
| size_t len; |
| |
| len = strlcpy(buf,"abba",sizeof(buf)); |
| clang_analyzer_eval(len==4);// expected-warning{{TRUE}} |
| strlcat(buf, "efghi", 9); |
| // expected-warning@-1 {{String concatenation function overflows the destination buffer}} |
| } |
| |
| void f11() { |
| //test for Bug 41729 |
| char a[256], b[256]; |
| strlcpy(a, "world", sizeof(a)); |
| strlcpy(b, "hello ", sizeof(b)); |
| strlcat(b, a, sizeof(b)); // no-warning |
| } |
| |
| int a, b; |
| void unknown_val_crash() { |
| // We're unable to evaluate the integer-to-pointer cast. |
| strlcat(&b, a, 0); // no-crash |
| } |