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From: Scott P. <pa...@la...> - 2010-05-13 22:06:02
|
Julian,
Thanks for the prompt response!
> Passing the identity of bits of the guest state to helper functions
> is pretty dangerous; you need to be careful to tell the IR optimiser
> that that whole section of the guest state can change in arbitrary ways.
I'm just keeping track of which register bytes have been read when.
I'm not actually modifying any part of guest state.
> It's safer to pass values (simulated register contents, really)
> to helper functions.
I'm not sure I understand this. Maybe I didn't ask my question
correctly so let me try again: If my instrumentation code sees
t3 = 0x1000
t4 = Add32(t3, 0x234)
t5 = GETI(128:8xI8)[t4,-1]
then I want the handler function to get passed 0x1234. Is 0x1234 what
you mean by a value/simulated register contents? If so, then what do
I put in my instrumentation code to ensure that the handler sees that
0x1234?
-- Scott
|
|
From: Julian S. <js...@ac...> - 2010-05-13 20:35:36
|
On Thursday 13 May 2010, Scott Pakin wrote:
> I'm writing my first Valgrind tool, and I'm baffled about how to pass
> a GetI.ix to an execution-time function. For example, if at
> instrumentation time I encounter a GETI(128:8xI8)[t1,0] expression,
> how can I ensure that the function call I insert receives the
> *contents* of the t1 temporary when called?
>
> IRSB* myinstrumenter(...)
> {
> ...
> IRExpr* myGetIexpr;
> ...
Let's say that you have (at jit time) some "IRTemp t", which
holds the identity of t1. Then
> dcall_argv = mkIRExprVec_1(<WHAT GOES HERE?>)
mkIRExprVec_1( mkexpr(t) )
> dcall = unsafeIRDirty_0_N(0, "myfunction",
> VG_(fnptr_to_fnentry)(&myfunction),
> dcall_argv);
> addStmtToIRSB(sbOut, IRStmt_Dirty(dcall));
> ...
> }
>
> void myfunction(<WHAT GOES HERE?> ixValue)
Word ixValue
> {
> ...
> }
(Word is a signed machine word)
Passing the identity of bits of the guest state to helper functions
is pretty dangerous; you need to be careful to tell the IR optimiser
that that whole section of the guest state can change in arbitrary ways.
It's safer to pass values (simulated register contents, really)
to helper functions. FWIW, the guest state section denoted by
(128:8xI8) is the tag array for the x87 register stack, which I doubt
contains anything much interesting anyway.
J
|
|
From: Scott P. <pa...@la...> - 2010-05-13 20:14:33
|
I'm writing my first Valgrind tool, and I'm baffled about how to pass
a GetI.ix to an execution-time function. For example, if at
instrumentation time I encounter a GETI(128:8xI8)[t1,0] expression,
how can I ensure that the function call I insert receives the
*contents* of the t1 temporary when called?
IRSB* myinstrumenter(...)
{
...
IRExpr* myGetIexpr;
...
dcall_argv = mkIRExprVec_1(<WHAT GOES HERE?>)
dcall = unsafeIRDirty_0_N(0, "myfunction",
VG_(fnptr_to_fnentry)(&myfunction),
dcall_argv);
addStmtToIRSB(sbOut, IRStmt_Dirty(dcall));
...
}
void myfunction(<WHAT GOES HERE?> ixValue)
{
...
}
Thanks in advance,
-- Scott
|
|
From: <sv...@va...> - 2010-05-13 08:11:00
|
Author: bart
Date: 2010-05-13 09:10:52 +0100 (Thu, 13 May 2010)
New Revision: 11130
Log:
Added an additional tl_assert() statement.
Modified:
trunk/drd/drd_semaphore.c
Modified: trunk/drd/drd_semaphore.c
===================================================================
--- trunk/drd/drd_semaphore.c 2010-05-13 06:32:36 UTC (rev 11129)
+++ trunk/drd/drd_semaphore.c 2010-05-13 08:10:52 UTC (rev 11130)
@@ -337,6 +337,7 @@
{
struct semaphore_info* p;
+ tl_assert(semaphore < semaphore + 1);
p = drd_semaphore_get_or_allocate(semaphore);
tl_assert(p);
p->waiters++;
|
|
From: Alexander P. <gl...@go...> - 2010-05-13 07:31:35
|
Nightly build on mcgrind ( Darwin 9.8.0 i386 ) Started at 2010-05-13 09:06:00 MSD Ended at 2010-05-13 09:24:41 MSD 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 == 442 tests, 26 stderr failures, 1 stdout failure, 0 post failures == memcheck/tests/null_socket (stdout) memcheck/tests/origin5-bz2 (stderr) memcheck/tests/varinfo1 (stderr) memcheck/tests/varinfo2 (stderr) memcheck/tests/varinfo3 (stderr) memcheck/tests/varinfo4 (stderr) memcheck/tests/varinfo5 (stderr) memcheck/tests/varinfo6 (stderr) none/tests/async-sigs (stderr) none/tests/faultstatus (stderr) none/tests/pth_blockedsig (stderr) none/tests/require-text-symbol-2 (stderr) helgrind/tests/hg05_race2 (stderr) helgrind/tests/rwlock_race (stderr) helgrind/tests/tc06_two_races_xml (stderr) helgrind/tests/tc17_sembar (stderr) helgrind/tests/tc18_semabuse (stderr) helgrind/tests/tc23_bogus_condwait (stderr) helgrind/tests/tc24_nonzero_sem (stderr) drd/tests/circular_buffer (stderr) drd/tests/pth_inconsistent_cond_wait (stderr) drd/tests/sem_open (stderr) drd/tests/sem_open2 (stderr) drd/tests/sem_open3 (stderr) drd/tests/sem_open_traced (stderr) drd/tests/tc17_sembar (stderr) drd/tests/tc23_bogus_condwait (stderr) -- Alexander Potapenko Software Engineer Google Moscow |
|
From: <sv...@va...> - 2010-05-13 06:32:45
|
Author: bart
Date: 2010-05-13 07:32:36 +0100 (Thu, 13 May 2010)
New Revision: 11129
Log:
Added support for glibc 2.12.
Note: many Helgrind and DRD regression tests still fail on Fedora 13 because
of differences in the call stacks of error reports compared to earlier
glibc/gcc combinations.
Modified:
trunk/configure.in
Modified: trunk/configure.in
===================================================================
--- trunk/configure.in 2010-05-12 10:01:32 UTC (rev 11128)
+++ trunk/configure.in 2010-05-13 06:32:36 UTC (rev 11129)
@@ -684,6 +684,16 @@
],
GLIBC_VERSION="2.11")
+AC_EGREP_CPP([GLIBC_212], [
+#include <features.h>
+#ifdef __GNU_LIBRARY__
+ #if (__GLIBC__ == 2 && __GLIBC_MINOR__ == 12)
+ GLIBC_212
+ #endif
+#endif
+],
+GLIBC_VERSION="2.12")
+
AC_EGREP_CPP([AIX5_LIBC], [
#include <standards.h>
#if defined(_AIXVERSION_510) || defined(_AIXVERSION_520) || defined(_AIXVERSION_530)
@@ -776,6 +786,13 @@
DEFAULT_SUPP="glibc-2.X.supp ${DEFAULT_SUPP}"
DEFAULT_SUPP="glibc-2.34567-NPTL-helgrind.supp ${DEFAULT_SUPP}"
DEFAULT_SUPP="glibc-2.X-drd.supp ${DEFAULT_SUPP}"
+ ;;
+ 2.12)
+ AC_MSG_RESULT(2.12 family)
+ AC_DEFINE([GLIBC_2_12], 1, [Define to 1 if you're using glibc 2.12.x])
+ DEFAULT_SUPP="glibc-2.X.supp ${DEFAULT_SUPP}"
+ DEFAULT_SUPP="glibc-2.34567-NPTL-helgrind.supp ${DEFAULT_SUPP}"
+ DEFAULT_SUPP="glibc-2.X-drd.supp ${DEFAULT_SUPP}"
;;
aix5)
AC_MSG_RESULT(AIX 5.1 or 5.2 or 5.3)
@@ -790,7 +807,7 @@
*)
AC_MSG_RESULT(unsupported version)
- AC_MSG_ERROR([Valgrind requires glibc version 2.2 - 2.11])
+ AC_MSG_ERROR([Valgrind requires glibc version 2.2 - 2.12])
AC_MSG_ERROR([or AIX 5.1 or 5.2 or 5.3 GLIBC_VERSION])
AC_MSG_ERROR([or Darwin libc])
;;
|
|
From: Tom H. <th...@cy...> - 2010-05-13 02:45:39
|
Nightly build on lloyd ( x86_64, Fedora 7 ) Started at 2010-05-13 03:05:05 BST Ended at 2010-05-13 03:45:20 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 == 541 tests, 1 stderr failure, 0 stdout failures, 0 post failures == helgrind/tests/tc06_two_races_xml (stderr) |
|
From: Tom H. <th...@cy...> - 2010-05-13 02:36:20
|
Nightly build on mg ( x86_64, Fedora 9 ) Started at 2010-05-13 03:10:05 BST Ended at 2010-05-13 03:36:08 BST Results differ from 24 hours ago Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 548 tests, 1 stderr failure, 0 stdout failures, 0 post failures == helgrind/tests/tc06_two_races_xml (stderr) ================================================= == Results from 24 hours ago == ================================================= Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 548 tests, 2 stderr failures, 0 stdout failures, 0 post failures == helgrind/tests/pth_spinlock (stderr) helgrind/tests/tc06_two_races_xml (stderr) ================================================= == Difference between 24 hours ago and now == ================================================= *** old.short Thu May 13 03:23:18 2010 --- new.short Thu May 13 03:36:08 2010 *************** *** 8,11 **** ! == 548 tests, 2 stderr failures, 0 stdout failures, 0 post failures == ! helgrind/tests/pth_spinlock (stderr) helgrind/tests/tc06_two_races_xml (stderr) --- 8,10 ---- ! == 548 tests, 1 stderr failure, 0 stdout failures, 0 post failures == helgrind/tests/tc06_two_races_xml (stderr) |