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-rw-r--r--string/tester.c128
1 files changed, 14 insertions, 114 deletions
diff --git a/string/tester.c b/string/tester.c
index 24b0dad1cb..128d2c7731 100644
--- a/string/tester.c
+++ b/string/tester.c
@@ -34,6 +34,20 @@
#include <fcntl.h>
#include <libc-diag.h>
+/* This file tests a range of corner cases of string functions,
+ including cases where truncation occurs or where sizes specified
+ are larger than the actual buffers, which result in various
+ warnings. */
+DIAG_IGNORE_NEEDS_COMMENT (8, "-Warray-bounds");
+DIAG_IGNORE_NEEDS_COMMENT (5.0, "-Wmemset-transposed-args");
+#if __GNUC_PREREQ (7, 0)
+DIAG_IGNORE_NEEDS_COMMENT (9, "-Wrestrict");
+DIAG_IGNORE_NEEDS_COMMENT (7, "-Wstringop-overflow=");
+#endif
+#if __GNUC_PREREQ (8, 0)
+DIAG_IGNORE_NEEDS_COMMENT (8, "-Wstringop-truncation");
+#endif
+
#define STREQ(a, b) (strcmp((a), (b)) == 0)
@@ -264,15 +278,8 @@ test_stpncpy (void)
{
it = "stpncpy";
memset (one, 'x', sizeof (one));
- DIAG_PUSH_NEEDS_COMMENT;
-#if __GNUC_PREREQ (8, 0)
- /* GCC 8 warns about stpncpy truncating output; this is deliberately
- tested here. */
- DIAG_IGNORE_NEEDS_COMMENT (8, "-Wstringop-truncation");
-#endif
check (stpncpy (one, "abc", 2) == one + 2, 1);
check (stpncpy (one, "abc", 3) == one + 3, 2);
- DIAG_POP_NEEDS_COMMENT;
check (stpncpy (one, "abc", 4) == one + 3, 3);
check (one[3] == '\0' && one[4] == 'x', 4);
check (stpncpy (one, "abcd", 5) == one + 4, 5);
@@ -360,106 +367,41 @@ test_strncat (void)
mechanism. */
it = "strncat";
(void) strcpy (one, "ijk");
- DIAG_PUSH_NEEDS_COMMENT;
-#if __GNUC_PREREQ (7, 0)
- /* GCC 7 warns about the size passed to strncat being larger than
- the size of the buffer; this is deliberately tested here.. */
- DIAG_IGNORE_NEEDS_COMMENT (7, "-Wstringop-overflow=");
-#endif
check (strncat (one, "lmn", 99) == one, 1); /* Returned value. */
- DIAG_POP_NEEDS_COMMENT;
equal (one, "ijklmn", 2); /* Basic test. */
(void) strcpy (one, "x");
- DIAG_PUSH_NEEDS_COMMENT;
-#if __GNUC_PREREQ (7, 0)
- /* GCC 7 warns about the size passed to strncat being larger than
- the size of the buffer; this is deliberately tested here.. */
- DIAG_IGNORE_NEEDS_COMMENT (7, "-Wstringop-overflow=");
-#endif
(void) strncat (one, "yz", 99);
- DIAG_POP_NEEDS_COMMENT;
equal (one, "xyz", 3); /* Writeover. */
equal (one+4, "mn", 4); /* Wrote too much? */
(void) strcpy (one, "gh");
(void) strcpy (two, "ef");
- DIAG_PUSH_NEEDS_COMMENT;
-#if __GNUC_PREREQ (7, 0)
- /* GCC 7 warns about the size passed to strncat being larger than
- the size of the buffer; this is deliberately tested here; GCC 8
- gives a -Warray-bounds warning about this. */
- DIAG_IGNORE_NEEDS_COMMENT (7, "-Wstringop-overflow=");
-#endif
- DIAG_IGNORE_NEEDS_COMMENT (8, "-Warray-bounds");
(void) strncat (one, two, 99);
- DIAG_POP_NEEDS_COMMENT;
equal (one, "ghef", 5); /* Basic test encore. */
equal (two, "ef", 6); /* Stomped on source? */
(void) strcpy (one, "");
- DIAG_PUSH_NEEDS_COMMENT;
-#if __GNUC_PREREQ (7, 0)
- /* GCC 7 warns about the size passed to strncat being larger than
- the size of the buffer; this is deliberately tested here.. */
- DIAG_IGNORE_NEEDS_COMMENT (7, "-Wstringop-overflow=");
-#endif
(void) strncat (one, "", 99);
- DIAG_POP_NEEDS_COMMENT;
equal (one, "", 7); /* Boundary conditions. */
(void) strcpy (one, "ab");
- DIAG_PUSH_NEEDS_COMMENT;
-#if __GNUC_PREREQ (7, 0)
- /* GCC 7 warns about the size passed to strncat being larger than
- the size of the buffer; this is deliberately tested here.. */
- DIAG_IGNORE_NEEDS_COMMENT (7, "-Wstringop-overflow=");
-#endif
(void) strncat (one, "", 99);
- DIAG_POP_NEEDS_COMMENT;
equal (one, "ab", 8);
(void) strcpy (one, "");
- DIAG_PUSH_NEEDS_COMMENT;
-#if __GNUC_PREREQ (7, 0)
- /* GCC 7 warns about the size passed to strncat being larger than
- the size of the buffer; this is deliberately tested here.. */
- DIAG_IGNORE_NEEDS_COMMENT (7, "-Wstringop-overflow=");
-#endif
(void) strncat (one, "cd", 99);
- DIAG_POP_NEEDS_COMMENT;
equal (one, "cd", 9);
(void) strcpy (one, "ab");
- DIAG_PUSH_NEEDS_COMMENT;
-#if __GNUC_PREREQ (8, 0)
- /* GCC 8 warns about strncat truncating output; this is deliberately
- tested here. */
- DIAG_IGNORE_NEEDS_COMMENT (8, "-Wstringop-truncation");
-#endif
(void) strncat (one, "cdef", 2);
- DIAG_POP_NEEDS_COMMENT;
equal (one, "abcd", 10); /* Count-limited. */
(void) strncat (one, "gh", 0);
equal (one, "abcd", 11); /* Zero count. */
- DIAG_PUSH_NEEDS_COMMENT;
-#if __GNUC_PREREQ (7, 0)
- /* GCC 8 warns about strncat bound equal to source length; this is
- deliberately tested here. */
- DIAG_IGNORE_NEEDS_COMMENT (8, "-Wstringop-overflow=");
-#endif
(void) strncat (one, "gh", 2);
- DIAG_POP_NEEDS_COMMENT;
equal (one, "abcdgh", 12); /* Count and length equal. */
- DIAG_PUSH_NEEDS_COMMENT;
-#if __GNUC_PREREQ (7, 0)
- /* GCC 7 warns about the size passed to strncat being larger than
- the size of the buffer; this is deliberately tested here.. */
- DIAG_IGNORE_NEEDS_COMMENT (7, "-Wstringop-overflow=");
-#endif
(void) strncat (one, "ij", (size_t)-1); /* set sign bit in count */
- DIAG_POP_NEEDS_COMMENT;
equal (one, "abcdghij", 13);
int ntest = 14;
@@ -478,22 +420,8 @@ test_strncat (void)
buf1[n2 + n3] = '\0';
strcpy (buf2 + n1, "123");
- DIAG_PUSH_NEEDS_COMMENT;
-#if __GNUC_PREREQ (7, 0)
- /* GCC 7 warns about the size passed to strncat being
- larger than the size of the buffer; this is
- deliberately tested here; GCC 8 gives a -Warray-bounds
- warning about this. */
- DIAG_IGNORE_NEEDS_COMMENT (7, "-Wstringop-overflow=");
- /* GCC 9 as of 2018-06-14 warns that the size passed is
- large enough that, if it were the actual object size,
- the objects would have to overlap. */
- DIAG_IGNORE_NEEDS_COMMENT (9, "-Wrestrict");
-#endif
- DIAG_IGNORE_NEEDS_COMMENT (8, "-Warray-bounds");
check (strncat (buf1 + n2, buf2 + n1, ~((size_t) 0) - n4)
== buf1 + n2, ntest);
- DIAG_POP_NEEDS_COMMENT;
if (errors == olderrors)
for (size_t i = 0; i < sizeof (buf1); ++i)
{
@@ -552,25 +480,11 @@ test_strncpy (void)
equal (one, "abc", 2); /* Did the copy go right? */
(void) strcpy (one, "abcdefgh");
- DIAG_PUSH_NEEDS_COMMENT;
-#if __GNUC_PREREQ (8, 0)
- /* GCC 8 warns about strncpy truncating output; this is deliberately
- tested here. */
- DIAG_IGNORE_NEEDS_COMMENT (8, "-Wstringop-truncation");
-#endif
(void) strncpy (one, "xyz", 2);
- DIAG_POP_NEEDS_COMMENT;
equal (one, "xycdefgh", 3); /* Copy cut by count. */
(void) strcpy (one, "abcdefgh");
- DIAG_PUSH_NEEDS_COMMENT;
-#if __GNUC_PREREQ (8, 0)
- /* GCC 8 warns about strncpy truncating output; this is deliberately
- tested here. */
- DIAG_IGNORE_NEEDS_COMMENT (8, "-Wstringop-truncation");
-#endif
(void) strncpy (one, "xyz", 3); /* Copy cut just before NUL. */
- DIAG_POP_NEEDS_COMMENT;
equal (one, "xyzdefgh", 4);
(void) strcpy (one, "abcdefgh");
@@ -585,14 +499,7 @@ test_strncpy (void)
equal (one+5, "fgh", 9);
(void) strcpy (one, "abc");
- DIAG_PUSH_NEEDS_COMMENT;
-#if __GNUC_PREREQ (8, 0)
- /* GCC 8 warns about strncpy truncating output; this is deliberately
- tested here. */
- DIAG_IGNORE_NEEDS_COMMENT (8, "-Wstringop-truncation");
-#endif
(void) strncpy (one, "xyz", 0); /* Zero-length copy. */
- DIAG_POP_NEEDS_COMMENT;
equal (one, "abc", 10);
(void) strncpy (one, "", 2); /* Zero-length source. */
@@ -1411,15 +1318,8 @@ test_memset (void)
check(memset(one+1, 'x', 3) == one+1, 1); /* Return value. */
equal(one, "axxxefgh", 2); /* Basic test. */
- DIAG_PUSH_NEEDS_COMMENT;
-#if __GNUC_PREREQ (5, 0)
- /* GCC 5.0 warns about a zero-length memset because the arguments to memset
- may be in the wrong order. But we really want to test this. */
- DIAG_IGNORE_NEEDS_COMMENT (5.0, "-Wmemset-transposed-args")
-#endif
(void) memset(one+2, 'y', 0);
equal(one, "axxxefgh", 3); /* Zero-length set. */
- DIAG_POP_NEEDS_COMMENT;
(void) memset(one+5, 0, 1);
equal(one, "axxxe", 4); /* Zero fill. */
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-21 06:38:10 +0000