On 18.01.2018 at 20:22, Sam Ding wrote:

> "gdb" seems not support php code.
> 
> I run gdb like follows:
> 
>    # gdb ../sapi/cli/php
>    GNU gdb (GDB) Red Hat Enterprise Linux 7.6.1-80.el7
>    Copyright (C) 2013 Free Software Foundation, Inc.
>    ...
>    Reading symbols from /home/work/php/php-src/sapi/cli/php...done.
>    (gdb) b bug72300.php:5
>    No source file named bug72300.php.
>    Make breakpoint pending on future shared library load? (y or [n]) y
>    Breakpoint 1 (bug72300.php:5) pending.
>    (gdb) r
>    Starting program: /home/work/php/php-src/case/../sapi/cli/php
>    [Thread debugging using libthread_db enabled]
>    Using host libthread_db library "/lib64/libthread_db.so.1".
> 
> then gdb freezes at this point (/lib64/libthread_db.so.1).
> 
> How to set break point in php and then step by step go into C code?

As far as I know, this is not possible.  You can, however, set a
breakpoint for a certain PHP function (just preprend `zif_` to the PHP
function name; in this case do `b zif_ignore_user_abort`).  To actually
start the debugging, do something like `r
ext/standard/tests/general_functions/bug72300.php`.

Most likely, there are more elegant ways to do this, but I don't know them.

BTW: it seems that your latest mails didn't make it to the list (see
e.g. <https://externals.io/message/101603>) for whatever reason.

-- 
Christoph M. Becker

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