3ae108464d
This creates a SysprofCallgraph object which is a GListModel of SysprofCallgraphFrame. The SysprofCallgraphFrame is also a GListModel of SysprofCallgraphFrame so that we can map this all into a GtkListView in the future for tree-like visibility. The augmentation allows for the same callgraph code to be used for multiple scenarios such as CPU sampling as well as memory allocation tracking. If your augmentation size is <=sizeof(void*) then you do not occur an extra allocation and you can use the inline augmentation space. The test-callgraph clearly shows that we still need to do the shuffling of -- Kernel -- and -- User -- like the old callgraph code did. But that will come soon enough.
Sysprof is a sampling profiler that uses a kernel module to generate stacktraces which are then interpreted by the userspace program "sysprof".
See the Sysprof homepage for more information.
Merge requests and bug reports should be sent to sysprof's repository on GNOME's GitLab instance. For general discussion and questions, you can create a new topic in GNOME's Discourse.
The former mailing list is archived in https://mail.gnome.org/archives/sysprof-list/.
Debugging symbols
The programs and libraries you want to profile should be compiled
with -fno-omit-frame-pointer and have debugging symbols available,
or you won't get much usable information.
Building Sysprof
You need some packages installed. The package names may vary depending on your distribution, the following command works on Fedora 36:
sudo dnf install gcc gcc-c++ ninja-build gtk4-devel libadwaita-devel
Then do the following:
meson --prefix=/usr build
cd build
ninja
sudo ninja install
WARNING: ninja install will mostly install under the configured install
prefix but installs systemd service configuration directly in the system
default location /usr/lib/systemd so it won't work without root privileges,
even if the install prefix is a user-owned directory.