Tracing DLLs in in-process mode about perfetto HOT 3 CLOSED

Hi!

By linking statically the perfetto library to two separate DLLs, you're effectively creating two separate instances of the library, so the behavior you're observing is expected.

The most straightforward solution would be to avoid dynamic linking at all, that's what perfetto was originally designed for. I'm not sure it's an option in your case, though.

You can try linking dynamically, but the C++ annotations for dynamic linking (PERFETTO_EXPORT_COMPONENT) are supported on a best effort basis, mostly for tests.

Lastly, you can use the more restricted C API in include/perfetto/public (examples in examples/shared_lib/). Dynamic linking is officially supported there. The only blocker there is that there's no easy way to build the C shared library with CMake. I've opened #713 to keep track of this.

Those are the options at the moment, I believe. Let me know if you have any questions.

from perfetto.

Thank you for this information!

I'll try dynamic linking (although it's not fully supported).

Does trace_categories.cc also have to be built as a dynamic library?

from perfetto.

Does trace_categories.cc also have to be built as a dynamic library?

Not really, you can have separate trace_categories.cc that are statically linked into each .DLL

from perfetto.