c# - 没有堆栈跟踪信息的 Mono SIGSEGV 崩溃

Question

我有一个用 C# 实现的机器学习算法(随机梯度下降)，它涉及在内存中缓存的 ~10GB 数据上进行 100 次迭代。程序在windows下运行良好，但部署到ubuntu时14.04.2 LTS运行 mono 3.12.1 ，该程序在大约 30 次迭代(大约需要一天)后随机崩溃，输出如下:

Stacktrace:


Native stacktrace:

mono() [0x4accac]
mono() [0x50451f]
mono() [0x42a7c7]
/lib/x86_64-linux-gnu/libpthread.so.0(+0xfcb0) [0x7f678b0d1cb0]
mono() [0x61c48f]
mono() [0x5cdfe6]
mono() [0x5dd95a]
mono() [0x5dd9bc]
mono() [0x5d0ff4]
mono() [0x5c7458]
mono() [0x5c765f]
mono() [0x5c8d6a]
mono() [0x5c980a]
mono() [0x5ccc15]
mono() [0x5d2ab0]
mono() [0x5dfb70]
mono() [0x5dffeb]
[0x4196f62e]
Debug info from gdb:

Could not attach to process.  If your uid matches the uid of the target process, check the setting of /proc/sys/kernel/yama/ptrace_scope, or try again as the root user.  For more details, see /etc/sysctl.d/10-ptrace.conf ptrace: Operation not permitted.
No threads.

=================================================================
Got a SIGSEGV while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries 
used by your application.
=================================================================

如何获得有关堆栈跟踪的更详细信息(例如，崩溃的实际行)，以便查明崩溃的原因？

如何从 gdb 获取详细的调试信息(而不是无法附加到进程错误)？

程序使用命令 nohup mono MyProgram.exe & 运行

Answer 1

非托管崩溃是单运行时错误，请在 https://github.com/mono/mono/issues/new 中提交工单带有如何重现问题的最小测试用例。