CI: try to build with HPX on Fedora

[junghans]

Due to some build failure with Fedora's HPX package in: https://koji.fedoraproject.org/koji/taskinfo?taskID=123213163

[junghans]

Ok we can reproduce it here:

The following tests FAILED:
	  2 - Kokkos_CoreUnitTest_Serial2 (Failed)
	  3 - Kokkos_CoreUnitTest_HPX (Failed)
Errors while running CTest

This is on x86_64, no ppc64le and aarch64, Kokkos_CoreUnitTest_HPX even segfaults.

[junghans]

Another side note @diehlpk figured out that:

export TESTS_ARGUMENTS="--hpx:ini=hpx.stacks.use_guard_pages=0"

helps with the hpx test.

/CC @hkaiser

[masterleinad]

We might just disable the respective since HPX throws its own exceptions by using std::set_new_handler (or try to catch that exception and throw our own).

[hkaiser]

Yes, currently HPX throws its own exceptions in tthis case, which is wrong. See STEllAR-GROUP/hpx#6543 for a possible fix.

Where can I see the actual runtime error generated by HPX, btw?

[masterleinad]

Where can I see the actual runtime error generated by HPX, btw?

https://github.com/kokkos/kokkos/actions/runs/10834072931/job/30062369318?pr=7331 has

[ RUN ] hpx.view_bad_alloc
terminate called after throwing an instance of 'hpx::detail::exception_with_infohpx::exception'
what(): new allocator failed to allocate memory: HPX(out_of_memory)

and it results from

kokkos/core/src/impl/Kokkos_HostSpace.cpp

Lines 78 to 85 in 603aa33

	if (arg_alloc_size)
	ptr = operator new(arg_alloc_size, std::align_val_t(alignment),
	std::nothrow_t{});
	if (!ptr || (reinterpret_cast<uintptr_t>(ptr) == ~uintptr_t(0)) ||
	(reinterpret_cast<uintptr_t>(ptr) & alignment_mask)) {
	Impl::throw_bad_alloc(name(), arg_alloc_size, arg_label);
	}

we are explicitly requesting not to throw an error when allocating.

[hkaiser]

Where can I see the actual runtime error generated by HPX, btw?

https://github.com/kokkos/kokkos/actions/runs/10834072931/job/30062369318?pr=7331 has

[ RUN ] hpx.view_bad_alloc
terminate called after throwing an instance of 'hpx::detail::exception_with_infohpx::exception'
what(): new allocator failed to allocate memory: HPX(out_of_memory)

and it results from

kokkos/core/src/impl/Kokkos_HostSpace.cpp

Lines 78 to 85 in 603aa33

	if (arg_alloc_size)
	ptr = operator new(arg_alloc_size, std::align_val_t(alignment),
	std::nothrow_t{});
	if (!ptr || (reinterpret_cast<uintptr_t>(ptr) == ~uintptr_t(0)) ||
	(reinterpret_cast<uintptr_t>(ptr) & alignment_mask)) {
	Impl::throw_bad_alloc(name(), arg_alloc_size, arg_label);
	}

we are explicitly requesting not to throw an error when allocating.

Ok, this is something else, then. Why is a handler set by std::set_new_handler invoked in this case to begin with?

[masterleinad]

Ok, this is something else, then. Why is a handler set by std::set_new_handler invoked in this case to begin with?

It seems https://github.com/llvm/llvm-project/blob/82a36468c74a29b6154639d659550c62457e655b/libcxx/src/new.cpp#L162-L166 is executed but we don't hit the catch clause for some reason but abort with an unhandled exception.

[hkaiser]

Ok, this is something else, then. Why is a handler set by std::set_new_handler invoked in this case to begin with?

It seems https://github.com/llvm/llvm-project/blob/82a36468c74a29b6154639d659550c62457e655b/libcxx/src/new.cpp#L162-L166 is executed but we don't hit the catch clause for some reason but abort with an unhandled exception.

Not sure what I can do about this... Would you have any ideas? It shouldn't matter whether the exception thrown from our new-handler is actually derived from std::bad_alloc (as it should, see the PR I linked above).

[hkaiser]

While I'm still not sure why this is happening, I can offer adding an option to HPX that allows disabling to set a new-handler (in the same way as one can already disable HPX's signal handling). This option could be used in environments like the Kokkos HPX backend. What do you think?

[masterleinad]

Note that we already have a HPX build in our CI that I would expect to reproduce the issue if we update the HPX version there, see

kokkos/.github/workflows/continuous-integration-workflow-hpx.yml

Lines 37 to 42 in b5509ab

	- name: checkout hpx
	uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
	with:
	repository: STELLAR-GROUP/hpx
	ref: v1.9.0
	path: hpx

.

[junghans]

Note that we already have a HPX build in our CI that I would expect to reproduce the issue if we update the HPX version there, see

kokkos/.github/workflows/continuous-integration-workflow-hpx.yml

Lines 37 to 42 in b5509ab

	- name: checkout hpx
	uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
	with:
	repository: STELLAR-GROUP/hpx
	ref: v1.9.0
	path: hpx

.

Let's see.

[junghans]

@masterleinad github-Linux-hpx works, but the build with the hpx-devel package on Fedora fails. Not sure if it is worth digging, but the fedora build logs are here:
https://koji.fedoraproject.org/koji/buildinfo?buildID=2540054

[masterleinad]

@masterleinad github-Linux-hpx works, but the build with the hpx-devel package on Fedora fails. Not sure if it is worth digging, but the fedora build logs are here:

Interesting. I can reproduce the issue locally with clang and libc++.

[junghans]

@masterleinad github-Linux-hpx works, but the build with the hpx-devel package on Fedora fails. Not sure if it is worth digging, but the fedora build logs are here:

Interesting. I can reproduce the issue locally with clang and libc++.

Did you build with:

            -DCMAKE_BUILD_TYPE=Debug \
            -DHPX_WITH_UNITY_BUILD=ON \
            -DHPX_WITH_MALLOC=system \
            -DHPX_WITH_NETWORKING=OFF \
            -DHPX_WITH_EXAMPLES=OFF \
            -DHPX_WITH_TESTS=OFF \