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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