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Editorial Team
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Asked: 2026-06-17T20:09:59+00:00

What is the best way to check for successful allocation of memory when using

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What is the best way to check for successful allocation of memory when using new in a kernel call with CUDA? Is there anything similar to (nothrow) if there isn’t is there a way to continue execution of the kernel, even in the event of memory allocation failure?

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  1. Editorial Team

    I don’t think that new is officially supported on the device-side. Moreover – to my knowledge – there is no support for exceptions on the device-side, so annotations like nothrow have no effect.

    What you can do in the kernel is to call malloc. Upon the failure the function just returns NULL and you can check that normally.

    Do note that

    • device-side malloc is supported only on devices 2.0 (Fermi) and higher.
    • By default you have only 8MB of heap memory. If you want to have more, you need to set the higher limit through cudaDeviceSetLimit.

    Further reading: CUDA C Programming Guide, v.5.0, chapter B.17 – Dynamic Global Memory Allocation

    Update: Tests have shown that new seems to be supported and seems to be working the same way, i.e. returning NULL upon failure.

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