please someone give me an example .. like instruction counter under sparc

i googled and found it can be done with trap #1,but i don't know how to
do it.

please me ,my brain is melting...

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xtaci wrote:
quote:

> please someone give me an example .. like instruction counter under sparc
>
> i googled and found it can be done with trap #1,but i don't know how to
> do it.
>
> please me ,my brain is melting...
>


to make it clear:
in x86 environment ,i can use ptrace(PTRACE_SINGLESTEP, pid, 0, 0) to do
single stepping.
i need the same thing under solaris/SPARC.

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xtaci <xtaci@163.com> wrote:
:>
:> please me ,my brain is melting...
:>

: to make it clear:
: in x86 environment ,i can use ptrace(PTRACE_SINGLESTEP, pid, 0, 0) to do
:  single stepping.
: i need the same thing under solaris/SPARC.
: 

What's wrong with same call on Sparc?


--

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In Solaris you use the /proc file system in your "debugger" to control a
process and its threads.

--
Norman Black
Stony Brook Software

"xtaci" <xtaci@163.com> wrote in message
news:bo87l5$1lop$1@mail.cn99.com...
quote:

> please someone give me an example .. like instruction counter under

sparc
quote:

>
> i googled and found it can be done with trap #1,but i don't know how

to
quote:

> do it.
>
> please me ,my brain is melting...
>

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Victor Wagner wrote:
quote:

> xtaci <xtaci@163.com> wrote:
> :>
> :> please me ,my brain is melting...
> :>
>
> : to make it clear:
> : in x86 environment ,i can use ptrace(PTRACE_SINGLESTEP, pid, 0, 0) to do
> :  single stepping.
> : i need the same thing under solaris/SPARC.
> : 
>
> What's wrong with same call on Sparc?
>
>


Because ,ptrace(SINGLESTEP,pid,0,0) make use of hardware support,that is
MSW(Machine Status Word),if we set the bit,CPU will run in single step
mode..
but SPARC does not support.

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Norman Black wrote:
quote:

> In Solaris you use the /proc file system in your "debugger" to control a
> process and its threads.
>
> --
> Norman Black
> Stony Brook Software
>
> "xtaci" <xtaci@163.com> wrote in message
> news:bo87l5$1lop$1@mail.cn99.com...
> 
>
> sparc
> 
>
> to
> 
>
>


Can You Make it more clearer?
i dont quite cache up with you,maybe a short piece of C code would help.

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> Can You Make it more clearer?
quote:

> i dont quite cache up with you,maybe a short piece of C code would

help.

man -s 4 proc

I do not use C. I use Modula-2. My own compiler in fact.

The proc file system has a host of functions for debugging a process.
Read the man page. In short you would use the PCRUN code with the PRSTEP
flag. This code is written to the appropriate "file" handle. Typically
this is done on s specific LWP, but can be done to a process. In that
case, whatever the current LWP was is acted upon.

--
Norman Black
Stony Brook Software

"xtaci" <xtaci@163.com> wrote in message
news:bo9m6q$e5p$2@mail.cn99.com...
quote:

> Norman Black wrote: 
control a[QUOTE] 
>
> Can You Make it more clearer?
> i dont quite cache up with you,maybe a short piece of C code would

help.
quote:

>

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Norman Black wrote:
quote:

> man -s 4 proc
>
> I do not use C. I use Modula-2. My own compiler in fact.
>
> The proc file system has a host of functions for debugging a process.
> Read the man page. In short you would use the PCRUN code with the PRSTEP
> flag. This code is written to the appropriate "file" handle. Typically
> this is done on s specific LWP, but can be done to a process. In that
> case, whatever the current LWP was is acted upon.
>
> --
> Norman Black
> Stony Brook Software
>
> "xtaci" <xtaci@163.com> wrote in message
> news:bo9m6q$e5p$2@mail.cn99.com...


I'm reading the man pages,and i saw SPARC.
Maybe you can give me your Modula-2 Code to speed up my process.
I have to finish a instruction counter before next week for some reason.
After all ,thank you very much.

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Norman Black wrote:
quote:

> man -s 4 proc
>
> I do not use C. I use Modula-2. My own compiler in fact.
>
> The proc file system has a host of functions for debugging a process.
> Read the man page. In short you would use the PCRUN code with the PRSTEP
> flag. This code is written to the appropriate "file" handle. Typically
> this is done on s specific LWP, but can be done to a process. In that
> case, whatever the current LWP was is acted upon.
>
> --
> Norman Black
> Stony Brook Software


yes ,i'm reading the man page...it helps a lot .
Modula-2 sounds interesting...do you mind if you send your sample code
in Modula, a instruction counter maybe.

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xtaci wrote: my code is
i don't know what is wrong with my code?
give me some hint please.

#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/procfs.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>


int main(void)
{

long long counter = 0;  /*  machine instruction counter */
int wait_val;           /*  child's return value        */
int pid;                /*  child's process id          */


long iov[2];
int fd, temp = 0;
char filename[512];


puts("Please wait");
switch (pid = fork()) {
case -1:
perror("fork");
break;
case 0: /*  child process starts        */
sprintf(filename,"/proc/%d/ctl",getpid());
iov[0] =1L;  //PCSTOP
iov[1] =0;


if ((fd = open(filename, O_WRONLY)) == -1) {
perror(filename);
exit(1);
}
printf("%s",filename);
write(fd,iov,2*sizeof(long));

/*
*  let it stop first
*/
execl("/bin/ls", "ls", NULL);

break;
/*  child process ends  */






default:/*  parent process starts       */
sprintf(filename,"/proc/%d/ctl",pid);
iov[0] =5L;//PCRUN
iov[1] =PRSTEP;


if ((fd = open(filename, O_WRONLY)) == -1) {
perror(filename);
exit(1);
}
printf("%s",filename);
write(fd,iov,2*sizeof(long));
/* LET THE PROCESS RUN IN SINGLE STEP MODE */

wait(&wait_val);
/*
*   parent waits for child to stop at next
*   instruction (execl())
*/
while(wait_val==SIGTRAP){
counter++;
/*
*   singlestep tracing and
*   release child
*   if unable call error.
*/
write(fd,iov,2*sizeof(long));
wait(&wait_val);
/*   wait for next instruction to complete  */
}

/*
* continue to stop, wait and release until
*/
}
printf("Number of machine instructions : %lld\n", counter);
return 0;
}

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