A pull request of an upstream fix to the dcfldd project has been
submitted:
https://github.com/resurrecting-open-source-projects/dcfldd/pull/24
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...and possibly wrap the above in:
#ifdef __powerpc__
...
#endif
so it's only used on POWER?
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Title:
MongoDB Memory corruption
To manage
I'll note that the LD_PRELOAD interposer library is only needed for
binaries that are already compiled and you want to override the
pthread_mutex_lock() routine. If you can recompile your source, then
you can place the interposer directly into your source and there is no
need for LD_PRELOADing
gdb shows the abort is from the shim library too:
bergner@ampere:~$ gdb -q ./a.out
Reading symbols from ./a.out...(no debugging symbols found)...done.
(gdb) set environment LD_PRELOAD=./libbar.so.1
(gdb) run
Starting program: /home/bergner/a.out
[Thread debugging using libthread_db enabled]
When I add the abort and use your C++ test case, I see the abort:
bergner@ampere:~$ cat pthread_mutex_lock.c
#include
#include
#define PTHREAD_MUTEX_NO_ELISION_NP 512
extern int __pthread_mutex_lock (pthread_mutex_t *);
int
pthread_mutex_lock (pthread_mutex_t *mutex)
{
abort();
The following might override the HTM lock elision. Can someone try it
to see if it works?
bergner@ampere:~$ cat pthread_mutex_lock.c
#include
#define PTHREAD_MUTEX_NO_ELISION_NP 512
extern int __pthread_mutex_lock (pthread_mutex_t *);
int
pthread_mutex_lock (pthread_mutex_t *mutex)
{
I minimized re.c down to a small test case and it looks like a false
positive on the array bounds check. Talking with Jakub, he said that
-Warray-bounds has lots of false positives, so I think either removing
the use of -Werror=array-bounds or using -O2 as permanent fixes for this
is probably
Here is a minimal test case extracted from swsusp_asm64.s:
bergner@genoa:~/binutils/BUGS$ cat tlbie.s
.text
tlbie %r4
bergner@genoa:~/binutils/BUGS$
/home/bergner/binutils/build/binutils-2_25/gas/as-new -a64 -mpower7 tlbie.s
tlbie.s: Assembler messages:
tlbie.s:2: Error:
I have the problem recreated. Debugging it now.
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Title:
4.0 kernel build failure on ppc64el
To manage notifications about this bug go to:
Verified in gcc version 4.8.4 (Ubuntu 4.8.4-2ubuntu1~14.04) too.
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Title:
ABI incompatibility between POWER and Z HTM builtins and intrinsics
To
Verified in gcc version 4.8.4 (Ubuntu 4.8.4-2ubuntu1~14.04) too.
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Title:
HTM __builtin_ttest rtl expansion uses wrong shift amount
To manage
Verified fixed in gcc version 4.8.4 (Ubuntu 4.8.4-2ubuntu1~14.04).
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Title:
Please incorporate gcc 4.8 revision 209515
To manage notifications
Sorry, verified with gcc version 4.9.1 (Ubuntu 4.9.1-16ubuntu6).
** Tags removed: verification-needed
** Tags added: verification-done
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Title:
I can verify this is fixed.
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Title:
HTM __builtin_ttest rtl expansion uses wrong shift amount
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I can verify that this is fixed.
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Title:
ABI incompatibility between POWER and Z HTM builtins and intrinsics
To manage notifications about this
Sorry, verified with gcc version 4.9.1 (Ubuntu 4.9.1-16ubuntu6).
** Tags removed: verification-needed
** Tags added: verification-done
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Title:
Public bug reported:
There is a semi-latent bug for the HTM ttest pattern used with the
__builtin_ttest() builtin. This is supposed to expand to a tabortwci.
instruction which sets cr0 and then some code that copies the cr0 value
into a gpr and then shifts and masks it into the lowest 2 bits in
Public bug reported:
The IBM XL team defined a set of HTM intrinsic functions that were supposed
to be API compatible across the XL and GCC compilers on both Power and S390.
PR61193 describes an issue where the functions that begin a transaction
are incompatible. The Power intrinsics return
How does this compare to the test results on BE?
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Title:
Many tests of Boost v1.54 fail
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Can you try with -mno-vsx and/or -fno-tree-vectorize? We have a bug
http://gcc.gnu.org/PR47862 that causes data corruption when vectorizing
and I can kind of see that sort might have a loop that might be hit by
this.
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