gfortran警告浮点异常 [英] gfortran warn on floating point exception

问题描述

我使用gfortran一些code。现在一段时间，我一直在用编译

I'm using gfortran for some code. For a while now, I've been compiling with

-ffpe-trap=zero,overflow,invalid

在试图追捕一些错误。这会导致我的程序立即停止执行。有些情况下FPE可能是确定等等之类的标志：

in an attempt to hunt down some bugs. This causes my program to cease execution immediately. There are some cases where the FPE might be OK and so a flag like:

-ffpe-warn=zero,overflow,invalid

将是非常有益的。是否gfortran（或任何其他编译器）提供了这样的事？如果不是，是否有任何变通办法？我现在的想法是创建一个C函数注册一个信号处理程序写出来的警告，虽然我不知道如何去这样做。

would be very useful. Does gfortran (or any other compiler) provide anything like this? If not, are there any workarounds? My current thought is to create a C function to register a signal handler to write out the warning, although I have no idea how to go about doing that.

推荐答案

我不知道在遇到一个浮点异常警告的方式。但无论gfortran和ifort有信号处理例程。例如，见信号的gfortran文件和
英特尔Fortran编译器<一个href=\"http://gcc.gnu.org/onlinedocs/gchttp://software.intel.com/sites/products/documentation/hpc/compilerpro/en-us/fortran/lin/main_for_lin.pdf\"相对=nofollow>用户和参考指南（警告：大PDF）。（见病房410页）

I don't know of a way of warning on encountering a floating point exception. But both gfortran and ifort have signal handling routines. See for example the gfortran documentation of signal and the Intel Fortran Compiler User and Reference Guides (warning: large PDF) (see page 410 on wards).

您可以建立一个呼叫信号下列操作之一信号：

You can establish one of the following actions for a signal with a call to signal:

  
• 忽略指定的信号（由数字标识）。

  
• 使用的默认操作为指定的信号，这可以重置previously既定行动。

  
• 从指定的信号给过程控制转移到接收信号，通过名称指定。

  

在你的情况，你会想编写一个函数做一些事情，当一个浮点异常时（例如打印文件名/行号），并在上面的列表中使用第三个选项。

In your case, you would want to write a function to do something when a floating point exception occurs (e.g. print file name/line number), and use the third option in the above list.

可惜，这不是很便携：看看此页< /一>用于处理关于各种编译器的信号的例子。如果你想，你可以包装在preprocessor宏一些code到

Unfortunately this is not very portable: take a look at this page for examples of signal handling for various compilers. You could wrap some code in preprocessor macros if you want to

• 对多编译器编译


• 如果一些preprocessor标志设置只使用信号处理例程（参见<一个href=\"http://stackoverflow.com/questions/5473556/what-is-the-ndebug-$p$pprocessor-macro-used-for-on-different-platforms\"><$c$c>-NDEBUG)

更新：最终， IEEE_EXCEPTIONS 内在模块的异常处理设施，将做到这一点的可移植的方法，如高性能马克建议

Update: Ultimately the exception handling facilities of the ieee_exceptions intrinsic module would be the portable way to do this, as suggested by High Performance Mark.

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