TABLE OF CONTENTS As described in several chapters in this book, porting is a process that consists of searching for and correcting dozens of small details any one of which, if overlooked, can lead to sudden, difficult-to-reproduce bugs. This checklist helps make sure you've checked for the "gotchas" lurking in your code.
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| Calls to native routines cause the biggest problem. These routines must run in 64-bit mode if the managed environment is in 64-bit mode. |
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| Microsoft .NET byte codes for platforms with Intel EM64T do not run unchanged in 32-bit modes. Make sure to provide versions for both platforms. |
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| Check for casts of pointers to integral types. |
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| Notice the promotion of integers to longs includes expansion from 32 to 64 bits on Linux with Intel EM64T. No change on Windows. |
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| Check for casts of longs to integers results in truncation of 64 to 32 bits on Linux with Intel EM64T. No change on Windows. |
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| Check structures: the new size of fundamental types changes padding, alignment, and size of fields in a structure. |
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| Check unions: the new size of fundamental types changes padding, alignment, and size of fields in a union. Do overlapping fields still overlap correctly? |
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| Check routines that depend on the specific number of bits of a data object. These situations occur especially in bit-wise operations and in computing hash codes. |
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| If you use abstracted data... |
