Debugging php with an extension loaded

Hi, Can anyone tell me how to debug php with the extension loaded? I've got an error in one of the standard tests for pecl-expect, and I can see where it's coming from, but I want to inspect the various scope variables. I've run up the following, which loads it in gdb and runs the test, which causes the failure, from within my extension compilation space, but I can't see how to load the symbols for the php binary or my extension .so. gdb -args /usr/bin/php7.2 -n -c \ /usr/local/src/pecl-expect/tmp-php.ini \ -d open_basedir= \ -d output_buffering=0 \ -d memory_limit=-1 \ -d extension_dir=/usr/local/src/pecl-expect/modules/ \ -d extension=expect.so \ /usr/local/src/pecl-expect/tests/bug6996.php Any help on how to debug the c side of extension would help, I'm currently using printf and php_error_docref to examine state. I tried compiling a fresh version of php-src checked out to the same php version as the install on this machine, but I can't even get that to run, and load the extension. Thanks in advance, Si ________________________________ The information contained in this e-mail message is intended only for the personal and confidential use of the recipient(s) named above. This message may be an attorney-client communication and/or work product and as such is privileged and confidential. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this document in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail, and delete the original message..