[glibc] String: Improve test coverage for memchr

[glibc] String: Improve test coverage for memchr

[Sunil Pandey]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=932dd83efdce7dbe7c008a27c4eff424a109b3a0

commit 932dd83efdce7dbe7c008a27c4eff424a109b3a0
Author: Sunil K Pandey <skpgkp2@gmail.com>
Date:   Tue Oct 18 00:36:51 2022 -0700

    String: Improve test coverage for memchr
    
    This test improves memchr coverage near page boundary.
    
    Reviewed-by: H.J. Lu <hjl.tools@gmail.com>

Diff:
---
 string/test-memchr.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/string/test-memchr.c b/string/test-memchr.c
index 1cbcd57fd4..ab206e05db 100644
--- a/string/test-memchr.c
+++ b/string/test-memchr.c
@@ -251,6 +251,7 @@ test_main (void)
       /* page_size is in fact getpagesize() * 2.  */
       do_test (page_size / 2 - i, i, i, 1, 0x9B);
       do_test (page_size / 2 - i, i - 1, i - 1, 1, 0x9B);
+      do_test (page_size / 2 - (i * 4), i + 128, i + 128, i, 0x9B);
     }
 
   do_random_tests ();

[glibc] String: Improve test coverage for memchr

[Sunil Pandey]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=264db94040c463d9bc356101595d89335586875e

commit 264db94040c463d9bc356101595d89335586875e
Author: Sunil K Pandey <skpgkp2@gmail.com>
Date:   Mon Oct 10 09:28:14 2022 -0700

    String: Improve test coverage for memchr
    
    This test improves memchr coverage near page boundary.
    
    Reviewed-by: H.J. Lu <hjl.tools@gmail.com>

Diff:
---
 string/test-memchr.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/string/test-memchr.c b/string/test-memchr.c
index 279a67ebe6..1cbcd57fd4 100644
--- a/string/test-memchr.c
+++ b/string/test-memchr.c
@@ -247,8 +247,11 @@ test_main (void)
   /* BZ#21182 - wrong overflow calculation for i686 implementation
      with address near end of the page.  */
   for (i = 2; i < 16; ++i)
-    /* page_size is in fact getpagesize() * 2.  */
-    do_test (page_size / 2 - i, i, i, 1, 0x9B);
+    {
+      /* page_size is in fact getpagesize() * 2.  */
+      do_test (page_size / 2 - i, i, i, 1, 0x9B);
+      do_test (page_size / 2 - i, i - 1, i - 1, 1, 0x9B);
+    }
 
   do_random_tests ();
   do_overflow_tests ();