* [ltt-dev] UST simple example not working
@ 2010-06-21 16:01 George Stephen-RVGG20
2010-06-21 16:12 ` Mathieu Desnoyers
0 siblings, 1 reply; 3+ messages in thread
From: George Stephen-RVGG20 @ 2010-06-21 16:01 UTC (permalink / raw)
Hello,
I tried this simple example for trace_marker and get incorrect values
for "return" in "ust.factorial" (return: 0).
The trace for "ust.args" works. I even tried this in a C version of the
sample with same errors.
Using g++ -o sample -g -lust sample.cpp; usttrace ./sample on a PowerPC
target.
class Factorial1 : public Factorial
{
public:
Factorial1(){}
virtual ~Factorial1(){}
unsigned long long do_factorial(unsigned long long n)
{
// user space trace instrumentation
trace_mark(ust, args, "in_arg %d", n);
if (n <= 1)
return 1;
else
return n *
do_factorial(n-1);
}
};
class Factorial2 : public Factorial
{
public:
Factorial2(){}
virtual ~Factorial2(){}
unsigned long long do_factorial(unsigned long long n)
{
unsigned long long ret = 1;
for ( int i = 1; i <= n; i++){
ret *= i;
}
// user space trace instrumentation
trace_mark(ust, factorial, "in_arg %d
return %d", n, ret);
return ret;
}
};
In another case I tried just: trace_mark(ust, factorial, "return %d",
ret) and the value for ret was the value for n.
Thanks for the help,
Stephen G.
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^ permalink raw reply [flat|nested] 3+ messages in thread* [ltt-dev] UST simple example not working
2010-06-21 16:01 [ltt-dev] UST simple example not working George Stephen-RVGG20
@ 2010-06-21 16:12 ` Mathieu Desnoyers
2010-06-22 15:39 ` George Stephen-RVGG20
0 siblings, 1 reply; 3+ messages in thread
From: Mathieu Desnoyers @ 2010-06-21 16:12 UTC (permalink / raw)
* George Stephen-RVGG20 (RVGG20 at freescale.com) wrote:
> Hello,
>
>
>
> I tried this simple example for trace_marker and get incorrect values
> for "return" in "ust.factorial" (return: 0).
>
> The trace for "ust.args" works. I even tried this in a C version of the
> sample with same errors.
>
> Using g++ -o sample -g -lust sample.cpp; usttrace ./sample on a PowerPC
> target.
>
>
>
> class Factorial1 : public Factorial
>
> {
>
> public:
>
> Factorial1(){}
>
> virtual ~Factorial1(){}
>
> unsigned long long do_factorial(unsigned long long n)
>
> {
>
> // user space trace instrumentation
>
> trace_mark(ust, args, "in_arg %d", n);
>
> if (n <= 1)
>
> return 1;
>
> else
>
> return n *
> do_factorial(n-1);
>
> }
>
> };
>
>
>
> class Factorial2 : public Factorial
>
> {
>
> public:
>
> Factorial2(){}
>
> virtual ~Factorial2(){}
>
> unsigned long long do_factorial(unsigned long long n)
>
> {
>
> unsigned long long ret = 1;
>
> for ( int i = 1; i <= n; i++){
>
> ret *= i;
>
> }
>
> // user space trace instrumentation
>
> trace_mark(ust, factorial, "in_arg %d
> return %d", n, ret);
Do you really have a '\n' in your format string ? This might be causing
your trouble.
Mathieu
>
> return ret;
>
> }
>
> };
>
>
>
> In another case I tried just: trace_mark(ust, factorial, "return %d",
> ret) and the value for ret was the value for n.
>
>
>
> Thanks for the help,
>
> Stephen G.
>
>
>
>
>
>
>
>
>
>
>
> _______________________________________________
> ltt-dev mailing list
> ltt-dev at lists.casi.polymtl.ca
> http://lists.casi.polymtl.ca/cgi-bin/mailman/listinfo/ltt-dev
--
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com
^ permalink raw reply [flat|nested] 3+ messages in thread* [ltt-dev] UST simple example not working
2010-06-21 16:12 ` Mathieu Desnoyers
@ 2010-06-22 15:39 ` George Stephen-RVGG20
0 siblings, 0 replies; 3+ messages in thread
From: George Stephen-RVGG20 @ 2010-06-22 15:39 UTC (permalink / raw)
OK, Found what I was doing wrong.
The format code for unsigned long long is "%llu".
I had used "%d".
Stephen G.
-----Original Message-----
From: Mathieu Desnoyers [mailto:compudj@krystal.dyndns.org]
Sent: Monday, June 21, 2010 11:12 AM
To: George Stephen-RVGG20
Cc: ltt-dev at lists.casi.polymtl.ca
Subject: Re: [ltt-dev] UST simple example not working
* George Stephen-RVGG20 (RVGG20 at freescale.com) wrote:
> Hello,
>
>
>
> I tried this simple example for trace_marker and get incorrect values
> for "return" in "ust.factorial" (return: 0).
>
> The trace for "ust.args" works. I even tried this in a C version of
the
> sample with same errors.
>
> Using g++ -o sample -g -lust sample.cpp; usttrace ./sample on a
PowerPC
> target.
>
>
>
> class Factorial1 : public Factorial
>
> {
>
> public:
>
> Factorial1(){}
>
> virtual ~Factorial1(){}
>
> unsigned long long do_factorial(unsigned long long n)
>
> {
>
> // user space trace instrumentation
>
> trace_mark(ust, args, "in_arg %d", n);
>
> if (n <= 1)
>
> return 1;
>
> else
>
> return n *
> do_factorial(n-1);
>
> }
>
> };
>
>
>
> class Factorial2 : public Factorial
>
> {
>
> public:
>
> Factorial2(){}
>
> virtual ~Factorial2(){}
>
> unsigned long long do_factorial(unsigned long long n)
>
> {
>
> unsigned long long ret = 1;
>
> for ( int i = 1; i <= n; i++){
>
> ret *= i;
>
> }
>
> // user space trace instrumentation
>
> trace_mark(ust, factorial, "in_arg %d
> return %d", n, ret);
Do you really have a '\n' in your format string ? This might be causing
your trouble.
Mathieu
>
> return ret;
>
> }
>
> };
>
>
>
> In another case I tried just: trace_mark(ust, factorial, "return %d",
> ret) and the value for ret was the value for n.
>
>
>
> Thanks for the help,
>
> Stephen G.
>
>
>
>
>
>
>
>
>
>
>
> _______________________________________________
> ltt-dev mailing list
> ltt-dev at lists.casi.polymtl.ca
> http://lists.casi.polymtl.ca/cgi-bin/mailman/listinfo/ltt-dev
--
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com
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