120 lines
4.0 KiB
C
120 lines
4.0 KiB
C
// RUN: %clang_cc1 -triple x86_64-apple-macosx10.14.0 %s -verify
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// RUN: %clang_cc1 -triple x86_64-apple-macosx10.14.0 %s -verify -DUSE_PASS_OBJECT_SIZE
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// RUN: %clang_cc1 -triple x86_64-apple-macosx10.14.0 %s -verify -DUSE_BUILTINS
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// RUN: %clang_cc1 -xc++ -triple x86_64-apple-macosx10.14.0 %s -verify
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// RUN: %clang_cc1 -xc++ -triple x86_64-apple-macosx10.14.0 %s -verify -DUSE_PASS_OBJECT_SIZE
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// RUN: %clang_cc1 -xc++ -triple x86_64-apple-macosx10.14.0 %s -verify -DUSE_BUILTINS
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typedef unsigned long size_t;
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if defined(USE_PASS_OBJECT_SIZE)
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void *memcpy(void *dst, const void *src, size_t c);
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static void *memcpy(void *dst __attribute__((pass_object_size(1))), const void *src, size_t c) __attribute__((overloadable)) __asm__("merp");
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static void *memcpy(void *const dst __attribute__((pass_object_size(1))), const void *src, size_t c) __attribute__((overloadable)) {
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return 0;
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}
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#elif defined(USE_BUILTINS)
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#define memcpy(x,y,z) __builtin_memcpy(x,y,z)
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#else
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void *memcpy(void *dst, const void *src, size_t c);
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#endif
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#ifdef __cplusplus
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}
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#endif
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void call_memcpy() {
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char dst[10];
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char src[20];
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memcpy(dst, src, 20); // expected-warning {{memcpy' will always overflow; destination buffer has size 10, but size argument is 20}}
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if (sizeof(dst) == sizeof(src))
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memcpy(dst, src, 20); // no warning, unreachable
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}
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void call_memcpy_type() {
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struct pair {
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int first;
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int second;
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};
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struct pair p;
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char buf[20];
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memcpy(&p.first, buf, 20);
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#ifdef USE_PASS_OBJECT_SIZE
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// Use the more strict checking mode on the pass_object_size attribute:
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// expected-warning@-3 {{memcpy' will always overflow; destination buffer has size 4, but size argument is 20}}
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#else
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// Or just fallback to type 0:
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// expected-warning@-6 {{memcpy' will always overflow; destination buffer has size 8, but size argument is 20}}
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#endif
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}
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void call_strncat() {
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char s1[10], s2[20];
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__builtin_strncat(s2, s1, 20);
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__builtin_strncat(s1, s2, 20); // expected-warning {{'strncat' size argument is too large; destination buffer has size 10, but size argument is 20}}
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}
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void call_strncpy() {
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char s1[10], s2[20];
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__builtin_strncpy(s2, s1, 20);
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__builtin_strncpy(s1, s2, 20); // expected-warning {{'strncpy' size argument is too large; destination buffer has size 10, but size argument is 20}}
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}
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void call_stpncpy() {
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char s1[10], s2[20];
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__builtin_stpncpy(s2, s1, 20);
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__builtin_stpncpy(s1, s2, 20); // expected-warning {{'stpncpy' size argument is too large; destination buffer has size 10, but size argument is 20}}
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}
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void call_memmove() {
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char s1[10], s2[20];
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__builtin_memmove(s2, s1, 20);
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__builtin_memmove(s1, s2, 20); // expected-warning {{'memmove' will always overflow; destination buffer has size 10, but size argument is 20}}
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}
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void call_memset() {
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char buf[10];
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__builtin_memset(buf, 0xff, 10);
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__builtin_memset(buf, 0xff, 11); // expected-warning {{'memset' will always overflow; destination buffer has size 10, but size argument is 11}}
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}
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void call_snprintf() {
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char buf[10];
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__builtin_snprintf(buf, 10, "merp");
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__builtin_snprintf(buf, 11, "merp"); // expected-warning {{'snprintf' size argument is too large; destination buffer has size 10, but size argument is 11}}
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}
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void call_vsnprintf() {
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char buf[10];
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__builtin_va_list list;
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__builtin_vsnprintf(buf, 10, "merp", list);
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__builtin_vsnprintf(buf, 11, "merp", list); // expected-warning {{'vsnprintf' size argument is too large; destination buffer has size 10, but size argument is 11}}
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}
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#ifdef __cplusplus
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template <class> struct S {
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void mf() const {
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__builtin_memset(const_cast<char *>(mv), 0, 0);
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}
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char mv[10];
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};
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template <int A, int B>
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void call_memcpy_dep() {
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char bufferA[A];
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char bufferB[B];
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memcpy(bufferA, bufferB, 10); // expected-warning{{'memcpy' will always overflow; destination buffer has size 9, but size argument is 10}}
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}
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void call_call_memcpy() {
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call_memcpy_dep<10, 9>();
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call_memcpy_dep<9, 10>(); // expected-note {{in instantiation of function template specialization 'call_memcpy_dep<9, 10>' requested here}}
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}
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#endif
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