Hello Victor Stinner.

Thanks. Your tip helped me a lot. I understood that I need to get position on bycode of the line. So I create the funcion to get position inside of the bycode. Now I can to jump the correct position on trace.

frame->f_lasti = checkBycodePosition(frame->f_code, 11);

int checkBycodePosition(PyCodeObject *co, int fline) { Py_ssize_t size = PyBytes_Size(co->co_lnotab) / 2; unsigned char *p = (unsigned char *)PyBytes_AsString(co->co_lnotab); int line = co->co_firstlineno; int addr = 0; while (--size >= 0) { addr += *p++;

line += (signed char)*p;

if (line == fline) break;

p++; } return addr; }

Att.

Leandro Müller

________________________________ De: Leandro Müller leandrogmuller@hotmail.com Enviado: segunda-feira, 23 de março de 2020 13:45 Para: Victor Stinner vstinner@python.org Cc: python-dev@python.org python-dev@python.org Assunto: [Python-Dev] Re: Jump on C by PyEval_SetTrace Python 3.7.7

Hi. When I changed frame->f_lasti change de code to back, it's work but the line in front code occurs dump, the runtime over. Example: I jump to 8 line and after I jump to line 10, it occurs dump.

On python trace pdb the jump works good by the frame-f_lineno.

Att.

Leandro Müller

________________________________ De: Victor Stinner vstinner@python.org Enviado: segunda-feira, 23 de março de 2020 13:01 Para: Leandro Müller leandrogmuller@hotmail.com Cc: python-dev@python.org python-dev@python.org Assunto: Re: [Python-Dev] Jump on C by PyEval_SetTrace Python 3.7.7

Hi,

It seems like you should be to modify frame->f_lasti in a trace function

FYI in a frame object, the line number is computed using frame->f_lasti and f->f_code->co_lnotab: PyFrame_GetLineNumber().

See: https://github.com/python/cpython/blob/master/Objects/lnotab_notes.txt

Good luck ;-)

Victor

Le lun. 23 mars 2020 à 00:50, Leandro Müller leandrogmuller@hotmail.com a écrit :

Hi everyone.

I'm trying to make a simple jump on C funcion trace by frame->f_lineno. Example is simple, but not working.

if (frame->f_lineno == 12){

frame->f_lineno = 8;

}

attached files C and python to run test. the line 12 I need to jump to line 8.

Att.

Leandro Müller

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