如何确定“总线错误”的原因？ [英] How to determine the cause for "BUS-Error"
问题描述
我正在使用带有yocto发行版和python 2.7.3的方板。
I'm working on a variscite board with a yocto distribution and python 2.7.3.
有时我从python解释器中收到一条 Bus错误消息。
我的程序正常运行至少几个小时或错误发生前几天。
但是一旦我得到它，当我尝试重新启动程序时我就直接得到了它。
我必须重新引导，然后系统才能再次工作。
I get sometimes a Bus error message from the python interpreter.
My program runs normally at least some hours or days before the error ocours.
But when I get it once, I get it directly when I try to restart my program.
I have to reboot before the system works again.
我的程序仅使用一个串行端口，一点USB通信和一些tcp套接字。
My program uses only a serial port, a bit usb communication and some tcp sockets.
我可以切换到其他硬件，并且遇到相同的问题。
I can switch to another hardware and get the same problems.
我也将python自检与
python -c from test import testall一起使用了
I also used the python selftest with
python -c "from test import testall"
这两个测试都出错了
test_getattr（测试。 test_builtin.BuiltinTest）...错误test_nameprep
（test.test_codecs.NameprepTest）...错误
test_getattr (test.test_builtin.BuiltinTest) ... ERROR test_nameprep (test.test_codecs.NameprepTest) ... ERROR
和自检始终停留在
test_callback_register_double（ctypes.test.test_callbacks.SampleCallbacksTestCase）...细分
故障
test_callback_register_double (ctypes.test.test_callbacks.SampleCallbacksTestCase) ... Segmentation fault
但是，当系统运行几个小时后，自检会更早地终止于
But when the systems runs some hours the selftests stops earlier at
ctypes.macholib.dyld
总线错误
ctypes.macholib.dyld Bus error
我用memtester检查了RAM，看来还可以。
如何找到问题的原因？
I checked the RAM with memtester, it seems to be okay.
How I can find the cause for the problems?
推荐答案
总线错误通常是由尝试访问应用程序引起的记忆力不能实际解决。在您的情况下，存在分段错误，这可能会导致取消引用错误的指针或类似的操作，从而导致访问物理上无法寻址的内存地址。我会首先从根本上引起分段错误，因为总线错误是第二种症状。
Bus errors are generally caused by applications trying to access memory that hardware cannot physically address. In your case there is a segmentation fault which may cause dereferencing a bad pointer or something similar which leads to accessing a memory address which physically is not addressable. I'd start by root causing the segmentation fault first as the bus error is the secondary symptom.
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