Mercurial > hg > CbC > CbC_gcc
diff gcc/testsuite/gcc.dg/attr-nonstring-2.c @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
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date | Thu, 25 Oct 2018 07:37:49 +0900 |
parents | |
children | 1830386684a0 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/gcc/testsuite/gcc.dg/attr-nonstring-2.c Thu Oct 25 07:37:49 2018 +0900 @@ -0,0 +1,115 @@ +/* PR middle-end/81384 - built-in form of strnlen missing + { dg-do compile } + { dg-options "-O2 -Wall -ftrack-macro-expansion=0" } */ + +#include "range.h" + +extern void* memcpy (void*, const void*, size_t); +extern size_t strnlen (const char*, size_t); + +#define NONSTRING __attribute__ ((nonstring)) + +#define _CAT(s, n) s ## n +#define CAT(s, n) _CAT (s, n) +#define UNIQ(n) CAT (n, __LINE__) + +void sink (size_t, ...); + +#define T(expr) sink (expr) + +void test_strnlen_array_cst (void) +{ + NONSTRING char ns3[3]; + sink (0, ns3); // "initialize" ns3 + + T (strnlen (ns3, 0)); + T (strnlen (ns3, 1)); + T (strnlen (ns3, 2)); + T (strnlen (ns3, 3)); + T (strnlen (ns3, 4)); /* { dg-warning "argument 1 declared attribute .nonstring. is smaller than the specified bound 4" } */ + T (strnlen (ns3, DIFF_MAX)); /* { dg-warning "argument 1 declared attribute .nonstring. is smaller than the specified bound \[0-9\]+" } */ + T (strnlen (ns3, SIZE_MAX)); /* { dg-warning "specified bound \[0-9\]+ exceeds maximum object size \[0-9\]+" } */ + + NONSTRING char ns5[5]; + sink (0, ns5); + + T (strnlen (ns5, 0)); + T (strnlen (ns5, 1)); + T (strnlen (ns5, 2)); + T (strnlen (ns5, 3)); + T (strnlen (ns5, 6)); /* { dg-warning "argument 1 declared attribute .nonstring. is smaller than the specified bound 6" } */ + T (strnlen (ns5, DIFF_MAX)); /* { dg-warning "argument 1 declared attribute .nonstring. is smaller than the specified bound \[0-9\]+" } */ + T (strnlen (ns5, SIZE_MAX)); /* { dg-warning "specified bound \[0-9\]+ exceeds maximum object size \[0-9\]+" } */ +} + + +void test_strnlen_array_range (void) +{ + NONSTRING char ns3[3]; + sink (0, ns3); // "initialize" ns3 + + T (strnlen (ns3, UR (0, 3))); + T (strnlen (ns3, UR (0, 9))); + T (strnlen (ns3, UR (3, 4))); + T (strnlen (ns3, UR (3, DIFF_MAX))); + T (strnlen (ns3, UR (4, 5))); /* { dg-warning "argument 1 declared attribute .nonstring. is smaller than the specified bound \\\[4, 5]" } */ + T (strnlen (ns3, UR (DIFF_MAX, SIZE_MAX))); /* { dg-warning "argument 1 declared attribute .nonstring. is smaller " } */ +} + + +#undef T +#define T(N, init, nelts, bound) \ + do { \ + extern NONSTRING char UNIQ (arr)[N]; \ + memcpy (UNIQ (arr), init, nelts); \ + sink (strnlen (UNIQ (arr), bound), UNIQ (arr)); \ + } while (0) + +void test_strnlen_string_cst (void) +{ + T (3, "1", 2, 1); + T (3, "1", 2, 2); + T (3, "1", 2, 3); + T (3, "12", 3, 1); + T (3, "12", 3, 9); + T (3, "123", 3, 1); + T (3, "123", 3, 4); /* { dg-warning "argument 1 declared attribute .nonstring. is smaller than the specified bound 4" "bug 86688" { xfail *-*-* } } */ + T (3, "123", 3, 9); /* { dg-warning "argument 1 declared attribute .nonstring. is smaller than the specified bound 9" "bug 86688" { xfail *-*-* } } */ + + T (5, "1", 2, 1); + T (5, "1", 2, 2); + T (5, "1", 2, 9); + + T (5, "12", 3, 1); + T (5, "12", 3, 9); + T (5, "123", 3, 1); + T (5, "123", 3, 5); + T (5, "123", 3, 6); /* { dg-warning "argument 1 declared attribute .nonstring. is smaller than the specified bound 6" } */ + + /* Strnlen shouldn't trigger a warning for arrays of unknown size + (except for accesses to uninitialized elements when those are + detected). */ + T (/* [] */, "1", 1, 1); + T (/* [] */, "1", 1, 2); + T (/* [] */, "1", 2, 1); + T (/* [] */, "1", 2, 2); + T (/* [] */, "1", 2, 3); + T (/* [] */, "1", 2, 9); + T (/* [] */, "1", 2, DIFF_MAX); + T (/* [] */, "1", 2, SIZE_MAX); + + size_t n = DIFF_MAX; + T (/* [] */, "123", 3, n); + T (/* [] */, "123", 3, n + 1); /* { dg-warning "specified bound \[0-9\]+ exceeds maximum object size " } */ + n = SIZE_MAX; + T (/* [] */, "123", 3, n); /* { dg-warning "specified bound \[0-9\]+ exceeds maximum object size " } */ +} + + +void test_strnlen_string_range (void) +{ + T (3, "1", 2, UR (0, 1)); + T (3, "1", 2, UR (3, 9)); + T (3, "123", 3, UR (4, 5)); /* { dg-warning "argument 1 declared attribute .nonstring. is smaller than the specified bound \\\[4, 5]" "bug 86688" { xfail *-*-* } } */ + T (3, "123", 3, UR (5, 9)); /* { dg-warning "argument 1 declared attribute .nonstring. is smaller than the specified bound \\\[5, 9]" "bug 86688" { xfail *-*-* } } */ +}