update to glibc-2.28-225.el8

Signed-off-by: anolis-bot <sam.zyc@alibaba-inc.com>

glibc-rh2109510-6.patch

@@ -0,0 +1,98 @@
+Partial backport of:
+
+commit cb7be1590e9b18e272e72eb4e910a7ad06a53bd0
+Author: Joseph Myers <joseph@codesourcery.com>
+Date:   Mon Dec 10 22:56:59 2018 +0000
+
+    Use gen-as-const.py to process .pysym files.
+    
+    This patch eliminates the gen-py-const.awk variant of gen-as-const,
+    switching to use of gnu-as-const.py (with a new --python option) to
+    process .pysym files (i.e., to generate nptl_lock_constants.py), as
+    the syntax of those files is identical to that of .sym files.
+    
+    Note that the generated nptl_lock_constants.py is *not* identical to
+    the version generated by the awk script.  Apart from the trivial
+    changes (comment referencing the new script, and output being sorted),
+    the constant FUTEX_WAITERS, PTHREAD_MUTEXATTR_FLAG_BITS,
+    PTHREAD_MUTEXATTR_FLAG_PSHARED and PTHREAD_MUTEX_PRIO_CEILING_MASK are
+    now output as positive rather than negative constants (on x86_64
+    anyway; maybe not necessarily on 32-bit systems):
+    
+    < FUTEX_WAITERS = -2147483648
+    ---
+    > FUTEX_WAITERS = 2147483648
+    
+    < PTHREAD_MUTEXATTR_FLAG_BITS = -251662336
+    < PTHREAD_MUTEXATTR_FLAG_PSHARED = -2147483648
+    ---
+    > PTHREAD_MUTEXATTR_FLAG_BITS = 4043304960
+    > PTHREAD_MUTEXATTR_FLAG_PSHARED = 2147483648
+    
+    < PTHREAD_MUTEX_PRIO_CEILING_MASK = -524288
+    ---
+    > PTHREAD_MUTEX_PRIO_CEILING_MASK = 4294443008
+    
+    This is because gen-as-const has a cast of the constant value to long
+    int, which gen-py-const lacks.
+    
+    I think the positive values are more logically correct, since the
+    constants in question are in fact unsigned in C.  But to reliably
+    produce gen-as-const.py output for constants that always (in C and
+    Python) reflects the signedness of values with the high bit of "long
+    int" set would mean more complicated logic needs to be used in
+    computing values.
+    
+    The more correct positive values by themselves produce a failure of
+    nptl/test-mutexattr-printers, because masking with
+    ~PTHREAD_MUTEXATTR_FLAG_BITS & ~PTHREAD_MUTEX_NO_ELISION_NP now leaves
+    a bit -1 << 32 in the Python value, resulting in a KeyError exception.
+    To avoid that, places masking with ~ of one of the constants in
+    question are changed to mask with 0xffffffff as well (this reflects
+    how ~ in Python applies to an infinite-precision integer whereas ~ in
+    C does not do any promotions beyond the width of int).
+    
+    Tested for x86_64.
+    
+            * scripts/gen-as-const.py (main): Handle --python option.
+            * scripts/gen-py-const.awk: Remove.
+            * Makerules (py-const-script): Use gen-as-const.py.
+            ($(py-const)): Likewise.
+            * nptl/nptl-printers.py (MutexPrinter.read_status_no_robust): Mask
+            with 0xffffffff together with ~(PTHREAD_MUTEX_PRIO_CEILING_MASK).
+            (MutexAttributesPrinter.read_values): Mask with 0xffffffff
+            together with ~PTHREAD_MUTEXATTR_FLAG_BITS and
+            ~PTHREAD_MUTEX_NO_ELISION_NP.
+            * manual/README.pretty-printers: Update reference to
+            gen-py-const.awk.
+
+Only the gen-as-const.py changes are included downstream.  We keep using
+gen-py-const.awk for the build.
+
+diff --git a/scripts/gen-as-const.py b/scripts/gen-as-const.py
+index f85e359394acb1a4..2f1dff092b98e044 100644
+--- a/scripts/gen-as-const.py
++++ b/scripts/gen-as-const.py
+@@ -75,6 +75,8 @@ def main():
+                         help='C compiler (including options) to use')
+     parser.add_argument('--test', action='store_true',
+                         help='Generate test case instead of header')
++    parser.add_argument('--python', action='store_true',
++                        help='Generate Python file instead of header')
+     parser.add_argument('sym_file',
+                         help='.sym file to process')
+     args = parser.parse_args()
+@@ -103,6 +105,13 @@ def main():
+             sym_data.append('START')
+     if args.test:
+         print(gen_test(sym_data))
++    elif args.python:
++        consts = glibcextract.compute_c_consts(sym_data, args.cc)
++        print('# GENERATED FILE\n'
++              '\n'
++              '# Constant definitions.\n'
++              '# See gen-as-const.py for details.\n')
++        print(''.join('%s = %s\n' % c for c in sorted(consts.items())), end='')
+     else:
+         consts = glibcextract.compute_c_consts(sym_data, args.cc)
+         print(''.join('#define %s %s\n' % c for c in sorted(consts.items())), end='')