[9fans] stepping in acid

[9fans] stepping in acid

[john]

I notice that the step() command in acid steps you by machine
instructions rather than C statements. While this is probably
useful in some cases, in my case I need to see what line of
C I am executing. Can somebody show me how to do this?
Thanks

John

Re: [9fans] stepping in acid

[erik quanstrom]

src(*PC) i think is what you want:


minooka; cat > sleep.c
#include<u.h>
#include<libc.h>

void
main(void)
{
	int i;

	for(i = 0; i < 100; i++)
		sleep(2000);
	exits("");
}

Re: [9fans] stepping in acid

[erik quanstrom]

i think this is what you want:

minooka; cat > sleep.c
#include<u.h>
#include<libc.h>

void
main(void)
{
	int i;

	for(i = 0; i < 100; i++)
		sleep(2000);
	exits("");
}

Re: [9fans] stepping in acid

[erik quanstrom]

sorry for the noise.  silly me.  i cut and paste
EOT.

	minooka; cat > sleep.c
	#include<u.h>
	#include<libc.h>

	void
	main(void)
	{
		int i;
	
		for(i = 0; i < 100; i++)
			sleep(2000);
		exits("");
	}
	<EOT>minooka; 8c sleep.c
	minooka; 8l sleep.8
	minooka; 8.out &
	minooka; acid $apid
	/proc/111181/text:386 plan 9 executable
	/sys/lib/acid/port
	/sys/lib/acid/386
	acid: lstk()
	sleep()+0x7 /sys/src/libc/9syscall/sleep.s:5
	main()+0x1b /usr/quanstro/sleep.c:10
		i=0x5
	_main+0x31 /sys/src/libc/386/main9.s:16
	acid: pc
	<stdin>:3: (error) pc used but not set
	acid: PC
	0x00000038
	acid: src(*PC)
	no source for /sys/src/libc/9syscall/sleep.s

- erik

Re: [9fans] stepping in acid

[Brantley Coile]

> I notice that the step() command in acid steps you by machine
> instructions rather than C statements. While this is probably
> useful in some cases, in my case I need to see what line of
> C I am executing. Can somebody show me how to do this?
> Thanks
> 
> John

stmnt()

Re: [9fans] stepping in acid

[Skip Tavakkolian]

>> I notice that the step() command in acid steps you by machine
>> instructions rather than C statements. While this is probably
>> useful in some cases, in my case I need to see what line of
>> C I am executing. Can somebody show me how to do this?
>> Thanks
>> 
>> John
> 
> stmnt()

acid is a beauty.  here's the definition from /sys/lib/acid/port

defn stmnt()			// step one statement
{
	local line;

	line = pcline(*PC);
	while 1 do {
		step();
		if line != pcline(*PC) then {
			src(*PC);
			return {};
		}
	}
}

Re: [9fans] stepping in acid

[john]

>>> I notice that the step() command in acid steps you by machine
>>> instructions rather than C statements. While this is probably
>>> useful in some cases, in my case I need to see what line of
>>> C I am executing. Can somebody show me how to do this?
>>> Thanks
>>> 
>>> John
>> 
>> stmnt()
> 
> acid is a beauty.  here's the definition from /sys/lib/acid/port
> 
> defn stmnt()			// step one statement
> {
> 	local line;
> 
> 	line = pcline(*PC);
> 	while 1 do {
> 		step();
> 		if line != pcline(*PC) then {
> 			src(*PC);
> 			return {};
> 		}
> 	}
> }

This looks like the thing I want; thanks everyone!

John

Re: [9fans] stepping in acid

[Axel Belinfante]

> > I notice that the step() command in acid steps you by machine
> > instructions rather than C statements. While this is probably
> > useful in some cases, in my case I need to see what line of
> > C I am executing. Can somebody show me how to do this?
> > Thanks

see also slide 18 (Library functions) of Russ' acid trips,
where he shows how you can set up the function 'stopped'
to automatically highlight the line where acid is stopped
in sam or acme, using acid 'Bsrc' command.

http://swtch.com/~rsc/talks/acid07/

(Russ: is there a way to give a URL that directly points
       to a particular page in acid trips?)


Axel.

Re: [9fans] stepping in acid

[Joel C. Salomon]

On Dec 20, 2007 4:29 PM, Axel Belinfante <Axel.Belinfante@cs.utwente.nl> wrote:
> (Russ: is there a way to give a URL that directly points
>        to a particular page in acid trips?)

Try <http://swtch.com/~rsc/talks/acid07/#(18)>; sometimes it works,
sometimes not.

--Joel