GNU C Library master sources branch master updated. glibc-2.27.9000-326-g0085be1

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http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=0085be1415a38b40a5a1a12e49368498f1687380

commit 0085be1415a38b40a5a1a12e49368498f1687380
Author: Stefan Liebler <stli@linux.vnet.ibm.com>
Date:   Thu Apr 19 12:38:37 2018 +0200

    Disable lock elision for mutex pretty printer tests.
    
    If e.g. the testcase nptl/test-mutex-printers is run
    with enabled lock-elision, it fails on s390x with:
    Error: Response does not match the expected pattern.
    Command: print *mutex
    Expected pattern: pthread_mutex_t
    Response:  No symbol "mutex" in current context.
    (gdb)
    
    See https://www.sourceware.org/ml/libc-alpha/2018-03/msg00583.html
    for more details.
    
    In fact the mutex pretty printer tests rely on looking at the
    internal details of the lock, thus we disable it by setting up
    the GLIB_TUNABLES environment variable inside gdb.
    
    ChangeLog:
    
    	* scripts/test_printers_common.py (init_test): Disable lock elision.

diff --git a/ChangeLog b/ChangeLog
index df941db..5cc4dc9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2018-04-19  Stefan Liebler  <stli@linux.vnet.ibm.com>
 
+	* scripts/test_printers_common.py (init_test): Disable lock elision.
+
+2018-04-19  Stefan Liebler  <stli@linux.vnet.ibm.com>
+
 	* math/test-tgmath.c (count_double, count_float,
 	count_ldouble, count_cdouble, count_cfloat,
 	count_cldouble): Use volatile int.
diff --git a/scripts/test_printers_common.py b/scripts/test_printers_common.py
index 73ca525..cf4de5a 100644
--- a/scripts/test_printers_common.py
+++ b/scripts/test_printers_common.py
@@ -171,6 +171,9 @@ def init_test(test_bin, printer_files, printer_names):
     # Finally, load the test binary.
     test('file {0}'.format(test_bin))
 
+    # Disable lock elision.
+    test('set environment GLIBC_TUNABLES glibc.elision.enable=0')
+
 def go_to_main():
     """Executes a gdb 'start' command, which takes us to main."""
 

http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=da796524f8d64df3113e3c538adf285cf3ba041c

commit da796524f8d64df3113e3c538adf285cf3ba041c
Author: Stefan Liebler <stli@linux.vnet.ibm.com>
Date:   Thu Apr 19 12:32:50 2018 +0200

    Use volatile global counters in test-tgmath.c.
    
    If build with -Os on s390x, the test-tgmath fails with:
    float functions not called often enough (-10000)
    
    Within compile_testf(), the counter (count_float) is saved
    before the complex functions are called.
    Afterwards the saved counter differs to the current-counter.
    
    But the tests with the complex functions do not increment count_float!
    Instead count_float is saved to a register before calling totalorder
    and totalordermag which both increment count_float.
    The compiler is allowed to do that as totalorderf and totalordermagf
    is declared with __attribute__ ((__const__)) in math/bits/mathcalls.h.
    
    Thus this patch adjusts the global counters to be volatile.
    Then count_float is saved after totalordermag.
    
    ChangeLog:
    
    	* math/test-tgmath.c (count_double, count_float,
    	count_ldouble, count_cdouble, count_cfloat,
    	count_cldouble): Use volatile int.

diff --git a/ChangeLog b/ChangeLog
index ec19da4..df941db 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2018-04-19  Stefan Liebler  <stli@linux.vnet.ibm.com>
+
+	* math/test-tgmath.c (count_double, count_float,
+	count_ldouble, count_cdouble, count_cfloat,
+	count_cldouble): Use volatile int.
+
 2018-04-19  Samuel Thibault  <samuel.thibault@ens-lyon.org>
 
 	* sysdeps/mach/hurd/i386/Makefile [$(subdir) = conform]
diff --git a/math/test-tgmath.c b/math/test-tgmath.c
index 6d8e7fd..2b0787c 100644
--- a/math/test-tgmath.c
+++ b/math/test-tgmath.c
@@ -45,12 +45,12 @@ complex float fz;
 complex double dz;
 complex long double lz;
 
-int count_double;
-int count_float;
-int count_ldouble;
-int count_cdouble;
-int count_cfloat;
-int count_cldouble;
+volatile int count_double;
+volatile int count_float;
+volatile int count_ldouble;
+volatile int count_cdouble;
+volatile int count_cfloat;
+volatile int count_cldouble;
 
 #define NCALLS     134
 #define NCALLS_INT 4

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog                       |   10 ++++++++++
 math/test-tgmath.c              |   12 ++++++------
 scripts/test_printers_common.py |    3 +++
 3 files changed, 19 insertions(+), 6 deletions(-)


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