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生成NaN浮点数时停止调试器

[英]Stopping the debugger when a NaN floating point number is produced

原文 2011-03-22 15:54:36 6 1 c++/ gdb/ floating-point/ nan

I have an C++ program. 我有一个C ++程序。 Somewhere in the program (hard to reproduce, but reproduceable) a caclculation results in a float beeing set to a NaN. 在程序的某处（难以重现，但可重现），caclculation导致浮动设置为NaN。 Since a floating point operation involving a NaN results in a NaN, this spreads fast. 由于涉及NaN的浮点运算导致NaN，因此传播速度很快。

Is there any way I can setup the compiler (gcc 4.4) or the debuger (gdb) to stop when a floating point operation results in a NaN? 有什么方法可以设置编译器（gcc 4.4）或debuger（gdb）在浮点运算导致NaN时停止？ That would be extremely useful. 那将非常有用。

Thanks! 谢谢！ Nathan 弥敦道

PS: It might matter: I am working under ubuntu linux 10.10. PS：可能很重要：我在ubuntu linux 10.10下工作。

1 个解决方案

您可以启用浮点异常 - 请参阅glibc控制函数 - 然后在生成NaN值时获得SIGFPE

在没有代码更改的情况下生成NaN浮点数时停止调试器 - Stopping the debugger when a NaN floating point number is produced without a code change

浮点数的符号 - Sign of a floating point number

给定数字的浮点分辨率 - Floating point resolution at a given number

浮点数设置精度 - Setting precision of floating point number

将浮点数与零进行比较 - Comparing floating point number to zero

什么是次正规浮点数？ - What is a subnormal floating point number?

浮点数的密度 - 数字的大小 - Density of floating point number - Magnitude of the number

我应该对包含无效值的数据集使用浮点数NaN或浮点数+布尔值吗？ - Should I use floating point's NaN, or floating point + bool for a data set that contains invalid values?

C vs C ++（CLI）中调试器中的浮点表示 - Floating Point Representation in Debugger in C vs C++(CLI)

C ++应用程序中NaN的原因没有引发浮点异常 - Causes for NaN in C++ application that do no raise a floating point exception

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相关问题 在没有代码更改的情况下生成NaN浮点数时停止调试器 - Stopping the debugger when a NaN floating point number is produced without a code change 浮点数的符号 - Sign of a floating point number 给定数字的浮点分辨率 - Floating point resolution at a given number 浮点数设置精度 - Setting precision of floating point number 将浮点数与零进行比较 - Comparing floating point number to zero 什么是次正规浮点数？ - What is a subnormal floating point number? 浮点数的密度 - 数字的大小 - Density of floating point number - Magnitude of the number 我应该对包含无效值的数据集使用浮点数NaN或浮点数+布尔值吗？ - Should I use floating point's NaN, or floating point + bool for a data set that contains invalid values? C vs C ++（CLI）中调试器中的浮点表示 - Floating Point Representation in Debugger in C vs C++(CLI) C ++应用程序中NaN的原因没有引发浮点异常 - Causes for NaN in C++ application that do no raise a floating point exception

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