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| new: argument 1 value '18446744073709551599' exceeds maximum https://forum.osdev.org/viewtopic.php?f=1&t=56507 |
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| Author: | AndrewAPrice [ Thu Sep 29, 2022 2:41 pm ] |
| Post subject: | new: argument 1 value '18446744073709551599' exceeds maximum |
When I compile user programs in my OS using gcc and libc++ and optimizations turned on, I get the following warning when I call 'new': Code: ../Libraries/libcxx/public/new:248:24: warning: argument 1 value '18446744073709551599' exceeds maximum object size 9223372036854775807 [-Walloc-size-larger-than=] 248 | return ::operator new(__args...); It hasn't yet caused any noticble bugs, and I the warning doesn't appear when optimizations are disabled. I'm curious why I'm getting this warning through. 18446744073709551599 = 0xFFFFFFFFFFFFFFEF Is something trying to allocate -16 bytes? |
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| Author: | Octocontrabass [ Thu Sep 29, 2022 5:24 pm ] |
| Post subject: | Re: new: argument 1 value '18446744073709551599' exceeds max |
AndrewAPrice wrote: When I compile user programs in my OS using clang Are you sure you're using Clang? That looks like a GCC warning. AndrewAPrice wrote: Is something trying to allocate -16 bytes? The static analyzer seems to think so. There may be a problem in your bounds checking, or (if you're actually using GCC) you might have hit a false positive. |
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| Author: | AndrewAPrice [ Thu Sep 29, 2022 9:16 pm ] |
| Post subject: | Re: new: argument 1 value '18446744073709551599' exceeds max |
You're right, I'm using GCC 12.2.0. |
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