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// RUN: %clang_analyze_cc1 -analyzer-checker=unix.cstring.BadSizeArg -analyzer-store=region -Wno-strncat-size -Wno-strlcpy-strlcat-size -Wno-sizeof-array-argument -Wno-sizeof-pointer-memaccess -verify %s
// RUN: %clang_analyze_cc1 -triple armv7-a15-linux -analyzer-checker=unix.cstring.BadSizeArg -analyzer-store=region -Wno-strncat-size -Wno-strlcpy-strlcat-size -Wno-sizeof-array-argument -Wno-sizeof-pointer-memaccess -verify %s
// RUN: %clang_analyze_cc1 -triple aarch64_be-none-linux-gnu -analyzer-checker=unix.cstring.BadSizeArg -analyzer-store=region -Wno-strncat-size -Wno-strlcpy-strlcat-size -Wno-sizeof-array-argument -Wno-sizeof-pointer-memaccess -verify %s
// RUN: %clang_analyze_cc1 -triple i386-apple-darwin10 -analyzer-checker=unix.cstring.BadSizeArg -analyzer-store=region -Wno-strncat-size -Wno-strlcpy-strlcat-size -Wno-sizeof-array-argument -Wno-sizeof-pointer-memaccess -verify %s
typedef __SIZE_TYPE__ size_t;
char *strncat(char *, const char *, size_t);
size_t strlen (const char *s);
size_t strlcpy(char *, const char *, size_t);
size_t strlcat(char *, const char *, size_t);
void testStrncat(const char *src) {
char dest[10];
strncat(dest, "AAAAAAAAAAAAAAAAAAAAAAAAAAAAA", sizeof(dest) - 1); // expected-warning {{Potential buffer overflow. Replace with 'sizeof(dest) - strlen(dest) - 1' or use a safer 'strlcat' API}}
strncat(dest, "AAAAAAAAAAAAAAAAAAAAAAAAAAA", sizeof(dest)); // expected-warning {{Potential buffer overflow. Replace with}}
strncat(dest, "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA", sizeof(dest) - strlen(dest)); // expected-warning {{Potential buffer overflow. Replace with}}
strncat(dest, src, sizeof(src)); // expected-warning {{Potential buffer overflow. Replace with}}
// Should not crash when sizeof has a type argument.
strncat(dest, "AAAAAAAAAAAAAAAAAAAAAAAAAAA", sizeof(char));
}
void testStrlcpy(const char *src) {
char dest[10];
size_t destlen = sizeof(dest);
size_t srclen = sizeof(src);
size_t badlen = 20;
size_t ulen;
strlcpy(dest, src, sizeof(dest));
strlcpy(dest, src, destlen);
strlcpy(dest, src, 10);
strlcpy(dest, src, 20); // expected-warning {{The third argument allows to potentially copy more bytes than it should. Replace with the value sizeof(dest) or lower}}
strlcpy(dest, src, badlen); // expected-warning {{The third argument allows to potentially copy more bytes than it should. Replace with the value sizeof(dest) or lower}}
strlcpy(dest, src, ulen);
strlcpy(dest + 5, src, 5);
strlcpy(dest + 5, src, 10); // expected-warning {{The third argument allows to potentially copy more bytes than it should. Replace with the value sizeof(<destination buffer>) or lower}}
strlcpy(dest, "aaaaaaaaaaaaaaa", 10); // no-warning
}
void testStrlcat(const char *src) {
char dest[10];
size_t badlen = 20;
size_t ulen;
strlcpy(dest, "aaaaa", sizeof("aaaaa") - 1);
strlcat(dest, "bbbb", (sizeof("bbbb") - 1) - sizeof(dest) - 1);
strlcpy(dest, "012345678", sizeof(dest));
strlcat(dest, "910", sizeof(dest));
strlcpy(dest, "0123456789", sizeof(dest));
strlcpy(dest, "0123456789", sizeof(dest));
strlcat(dest, "0123456789", badlen / 2);
strlcat(dest, "0123456789", badlen); // expected-warning {{The third argument allows to potentially copy more bytes than it should. Replace with the value sizeof(dest) or lower}}
strlcat(dest, "0123456789", badlen - strlen(dest) - 1);
strlcat(dest, src, ulen);
strlcpy(dest, src, 5);
strlcat(dest + 5, src, badlen); // expected-warning {{The third argument allows to potentially copy more bytes than it should. Replace with the value sizeof(<destination buffer>) or lower}}
strlcat(dest, "aaaaaaaaaaaaaaa", 10); // no-warning
}
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