When I run the C++ code generated by Matlab Coder, different errors ("invalid pointer," "invalid size," etc.) occur only under a small subset of chosen parameter values.

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Yueqian Liang
Yueqian Liang 2025 年 3 月 18 日
回答済み: Marie Anna NOVIELLO 2025 年 3 月 27 日
When I run the C++ code generated by Matlab Coder, it works correctly most of the time.
However, when some parameter values are used, errors occur, and these errors are often different. Sometimes it is "munmap_chunk(): invalid pointer," sometimes it is "double free or corruption (out)," sometimes it is "segmentation fault," and sometimes it is "free(): invalid size."
The errors occur in a subfunction whose output consists of some cell arrays of variable sizes. In most cases when errors occur, the code can run to the end of this subfunction.
Why does this happen? What should I do to resolve this problem?
  1 件のコメント
Raghu Boggavarapu
Raghu Boggavarapu 2025 年 3 月 27 日
@Yueqian Liang
Could you try generating MEX and run the MEX with the same arguments you are passing to the generated code and see if it reports any errors?

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回答 (1 件)

Marie Anna NOVIELLO
Marie Anna NOVIELLO 2025 年 3 月 27 日
The errors you're encountering, such as "munmap_chunk(): invalid pointer", "double free or corruption (out)", "segmentation fault", and "free(): invalid size", typically indicate issues related to memory management in C++ code, particularly with how memory is allocated, deallocated, or accessed.
Check dynamic memory allocation or look at the generated C++ code.

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