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| 3 | |
3 | |
| 4 | Glibc contains a bug that causes any program linked against pthreads AND |
4 | Glibc contains a bug that causes any program linked against pthreads AND |
| 5 | using coroutines (of any kind, not only Coro, but including most userspace |
5 | using coroutines (of any kind, not only Coro, but including most userspace |
| 6 | thread libraries like gnu-pth) or alternate stacks to segfault on calls to |
6 | thread libraries like gnu-pth) or alternate stacks to segfault on calls to |
| 7 | pthread functions. And glibc happens to do a lot of these calls. |
7 | pthread functions. And glibc happens to do a lot of these calls. |
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8 | |
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9 | (Even if you pelr is not compiled against pthreads, Time::HiRes links |
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10 | against -lrt, which drags in pthreads. The same is true for other modules, |
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11 | so watch out). |
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12 | |
| 9 | The bug is rather difficult to fix. This is not a problem, however, since |
13 | The bug is rather difficult to fix. This is not a problem, however, since |
| 10 | glibcs compiled for linux-2.4 use a much more efficient method to locate |
14 | glibcs compiled for linux-2.4 use a much more efficient method to locate |
| 11 | their data, which happens to work with coroutines. |
15 | their data, which happens to work with coroutines. |
| 12 | |
16 | |
| 13 | So the easy fix is to install a libc which was compiled for linux-2.4, |
17 | So the easy fix is to install a libc which was compiled for linux-2.4, |
| 14 | using the "--enable-kernel=2.4 i586-pc-linux-gnu" configure options. |
18 | using the "--enable-kernel=2.4 i586-pc-linux-gnu" configure options. |
| 15 | |
19 | |
| 16 | WARNING: This libc will no longer run on linux-2.2 or lower! |
20 | WARNING: This libc will no longer run on linux-2.2 or lower! |
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21 | |
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22 | UPDATE: I am no longer able to compile glibc-2.3.2 in this way. The reason |
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23 | is most probably that the glibc folks work on an enhanced thread local |
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24 | storage facility, and it might be that you need a 2.5 or 2.6 kernel to |
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25 | make it work. Glibc-2.3.1 works fine, though. |
