| 1 | If Coro causes segfaults a lot on calls to libc functions, the cause is |
1 | If Coro causes segfaults a lot on calls to libc functions, the cause is |
| 2 | probably a glibc compiled for i386 and kernel 2.2. |
2 | probably a glibc compiled for i386 and kernel 2.2. |
| 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) or alternate stacks to |
5 | using coroutines (of any kind, not only Coro, but including most userspace |
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6 | thread libraries like gnu-pth) or alternate stacks to segfault on calls to |
| 6 | segfault on calls to pthread functions. And glibc happens to do a lot of |
7 | pthread functions. And glibc happens to do a lot of these calls. |
| 7 | these calls. |
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| 8 | |
8 | |
| 9 | The bug is rather difficult to fix. This is not a problem, however, since |
9 | 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 |
10 | glibcs compiled for linux-2.4 use a much more efficient method to locate |
| 11 | their data, which happens to work tiwh coroutines. |
11 | their data, which happens to work with coroutines. |
| 12 | |
12 | |
| 13 | So the easy fix is to install a libc which was compiled for linux-2.4, |
13 | So the easy fix is to install a libc which was compiled for linux-2.4, |
| 14 | using the --enable-kernel=2.4 configure option. WARNING: This kernel will |
14 | using the "--enable-kernel=2.4 i586-pc-linux-gnu" configure options. |
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15 | |
| 15 | no longer run on linux-2.2 or lower! |
16 | WARNING: This libc will no longer run on linux-2.2 or lower! |
