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From: Paul M. <pa...@sa...> - 2006-07-02 22:40:58
|
It's possible to configure 64-bit PowerPC kernels with a 64kB page
size rather than the usual 4kB page size. That means that mmap
offsets, etc., need to be a multiple of 64k when running on such a
kernel. The ABI allows this and requires programs to get the page
size from the system (e.g. with getpagesize(), sysconf(), or by
looking at the AT_PAGESIZE aux table entry), rather than assuming a
hardcoded value.
At the moment we hardcode VKI_PAGE_SHIFT to 12 in
include/vki-ppc{32,64}-linux.h. There are only two places I can see
where we use VKI_PAGE_SIZE as an array dimension, both in
coregrind/m_ume.c. So it should be possible to make VKI_PAGE_SIZE and
VKI_PAGE_SHIFT be variables for ppc32 and ppc64.
A related potential gotcha is that the offset parameter to sys_mmap2
is always (byte_offset >> 12) rather than (byte_offset / PAGE_SIZE).
The PRE(sys_mmap2) code is OK as it stands but will need to be changed
if we make VKI_PAGE_SIZE a variable.
Paul.
|
|
From: Bryan M. <om...@br...> - 2006-07-02 15:47:59
|
please see http://www.brainmurders.eclipse.co.uk/omega.html for a complete overview of what this tool can do for you! (We use this heavily at work - feel free to give it a spin...) >From the web page: ================== Omega addresses what I perceive to be one of the few shortfalls of the excellent Valgrind Memcheck Tool - where Memcheck reports the location that a leaked block was allocated, Omega also shows where it was leaked. New in Beta4: ============= Bug fix in circular reference detection. Function wrappers around memcpy(), memmove() and memset(). More robust detection of functions returning values in the accumulator (fixes a false positive). Known Issues: ============= I have a wrapper around main() to detect when to stop tracking - if you are using threads and they don't exit before main() does, there will be problems. I haven't particularly tested this with threads yet - that's targeted for the next beta. Requested Features? =================== I am still toying with the idea of allowing targeted tracking through the use of the suppression system - exclusively report on a specified malloc() call. show hanging pointers at a targeted call to free(). turn on more verbose output for a given memory block. Generate leak reports in some XML format to make machine parsing simple. If you use Omega and think any of these features would be useful or have requests of your own, please let me know. As ever, I would welcome your comments, bug reports and especially any news of success stories. thanks, Bryan "Brain Murders" Meredith |
|
From: Tom H. <th...@cy...> - 2006-07-02 03:07:26
|
Nightly build on gill ( x86_64, Fedora Core 2 ) started at 2006-07-02 03:00:02 BST Results unchanged from 24 hours ago Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 260 tests, 4 stderr failures, 1 stdout failure, 0 posttest failures == memcheck/tests/stack_switch (stderr) memcheck/tests/x86/scalar (stderr) memcheck/tests/x86/scalar_supp (stderr) none/tests/fdleak_fcntl (stderr) none/tests/tls (stdout) |
|
From: <js...@ac...> - 2006-07-02 02:58:26
|
Nightly build on phoenix ( SuSE 10.0 ) started at 2006-07-02 03:30:01 BST Checking out vex source tree ... done Building vex ... done Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 235 tests, 4 stderr failures, 0 stdout failures, 0 posttest failures == memcheck/tests/leak-tree (stderr) memcheck/tests/stack_switch (stderr) memcheck/tests/x86/scalar (stderr) memcheck/tests/x86/scalar_supp (stderr) |
|
From: Tom H. <th...@cy...> - 2006-07-02 02:55:49
|
Nightly build on ford ( i686, Fedora Core 4 ) started at 2006-07-02 03:25:06 BST Results unchanged from 24 hours ago Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 235 tests, 5 stderr failures, 0 stdout failures, 0 posttest failures == memcheck/tests/leak-tree (stderr) memcheck/tests/pointer-trace (stderr) memcheck/tests/stack_switch (stderr) memcheck/tests/x86/scalar (stderr) memcheck/tests/x86/scalar_supp (stderr) |
|
From: Tom H. <to...@co...> - 2006-07-02 02:49:07
|
Nightly build on dunsmere ( athlon, Fedora Core 5 ) started at 2006-07-02 03:30:05 BST Results unchanged from 24 hours ago Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 237 tests, 5 stderr failures, 0 stdout failures, 0 posttest failures == memcheck/tests/mempool (stderr) memcheck/tests/pointer-trace (stderr) memcheck/tests/stack_switch (stderr) memcheck/tests/x86/scalar (stderr) memcheck/tests/xml1 (stderr) |
|
From: Tom H. <th...@cy...> - 2006-07-02 02:33:00
|
Nightly build on alvis ( i686, Red Hat 7.3 ) started at 2006-07-02 03:15:04 BST Results unchanged from 24 hours ago Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 236 tests, 19 stderr failures, 0 stdout failures, 0 posttest failures == memcheck/tests/addressable (stderr) memcheck/tests/badjump (stderr) memcheck/tests/describe-block (stderr) memcheck/tests/erringfds (stderr) memcheck/tests/leak-0 (stderr) memcheck/tests/leak-cycle (stderr) memcheck/tests/leak-regroot (stderr) memcheck/tests/leak-tree (stderr) memcheck/tests/match-overrun (stderr) memcheck/tests/mempool (stderr) memcheck/tests/partial_load_dflt (stderr) memcheck/tests/partial_load_ok (stderr) memcheck/tests/partiallydefinedeq (stderr) memcheck/tests/pointer-trace (stderr) memcheck/tests/sigkill (stderr) memcheck/tests/stack_changes (stderr) memcheck/tests/x86/scalar (stderr) memcheck/tests/x86/scalar_supp (stderr) memcheck/tests/xml1 (stderr) |
|
From: Tom H. <th...@cy...> - 2006-07-02 02:25:32
|
Nightly build on dellow ( x86_64, Fedora Core 5 ) started at 2006-07-02 03:10:05 BST Results unchanged from 24 hours ago Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 260 tests, 2 stderr failures, 0 stdout failures, 0 posttest failures == memcheck/tests/x86/scalar (stderr) memcheck/tests/xml1 (stderr) |