<![CDATA[QProcess created in another app: Would they share the stack ?]]>Hello everyone,
When a QProcess is created in another application (QProcess() called w/o parent means it wouldnt be started as a child process, but as a parallel one, right?) would they share the stack? Do we need to take care with sigaction and SA_ONSTACK ?

]]>https://forum.qt.io/topic/139473/qprocess-created-in-another-app-would-they-share-the-stackRSS for NodeFri, 06 Nov 2026 11:35:25 GMTWed, 21 Sep 2022 08:51:54 GMT60<![CDATA[Reply to QProcess created in another app: Would they share the stack ? on Wed, 21 Sep 2022 09:13:02 GMT]]>@QBst Different processes never share stack! Doesn't matter how they were started. Even heap memory is not shared. You need to use "shared memory" to share memory between processes.

]]>https://forum.qt.io/post/729581https://forum.qt.io/post/729581Wed, 21 Sep 2022 09:13:02 GMT<![CDATA[Reply to QProcess created in another app: Would they share the stack ? on Wed, 21 Sep 2022 09:11:06 GMT]]>@JonB said in QProcess created in another app: Would they share the stack ?:

No, they are separate processes, no "stack sharing".

Is that 100% clear? :) parent parameter is to do with Qt's object-ownership hierarchy, nothing to do with sub-process parentage. Sub-process parent will be the Qt program. And still no kind of "stack sharing" :)

]]>https://forum.qt.io/post/729580https://forum.qt.io/post/729580Wed, 21 Sep 2022 09:11:06 GMT<![CDATA[Reply to QProcess created in another app: Would they share the stack ? on Wed, 21 Sep 2022 09:03:17 GMT]]>Would they share the stack, when created as a child process (w. parent parameter: QProcess(parent) )?

]]>https://forum.qt.io/post/729578https://forum.qt.io/post/729578Wed, 21 Sep 2022 09:03:17 GMT<![CDATA[Reply to QProcess created in another app: Would they share the stack ? on Wed, 21 Sep 2022 08:58:29 GMT]]>@QBst
Hello and welcome.

No, they are separate processes, no "stack sharing". QProcess just runs an external process.

]]>https://forum.qt.io/post/729575https://forum.qt.io/post/729575Wed, 21 Sep 2022 08:58:29 GMT