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lib: fix calloc warning on recent compiler #16958

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merged 1 commit into from
Sep 30, 2024

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rzalamena
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Fix the following compiler warning:

lib/elf_py.c: In function _elffile_load_:
lib/elf_py.c:1310:34: warning: _calloc_ sizes specified with _sizeof_ in the earlier argument and not in the later argument [-Wcalloc-transposed-args]
 1310 |         w->sects = calloc(sizeof(PyObject *), w->ehdr->e_shnum);
      |                                  ^~~~~~~~
lib/elf_py.c:1310:34: note: earlier argument should specify number of elements, later size of each element

Fix the following compiler warning:
```
lib/elf_py.c: In function _elffile_load_:
lib/elf_py.c:1310:34: warning: _calloc_ sizes specified with _sizeof_ in the earlier argument and not in the later argument [-Wcalloc-transposed-args]
 1310 |         w->sects = calloc(sizeof(PyObject *), w->ehdr->e_shnum);
      |                                  ^~~~~~~~
lib/elf_py.c:1310:34: note: earlier argument should specify number of elements, later size of each element
```

Signed-off-by: Rafael Zalamena <[email protected]>
@@ -1307,7 +1307,7 @@ static PyObject *elffile_load(PyTypeObject *type, PyObject *args,
}
#endif

w->sects = calloc(sizeof(PyObject *), w->ehdr->e_shnum);
w->sects = calloc(w->ehdr->e_shnum, sizeof(PyObject *));
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How did this code ever work? or was it never used?

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calloc always multiples one number by the other. This is simple multiplication rules. The compiler is just asking for the number of elements * the size to be in a specific order

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I suppose. :)

@Jafaral Jafaral merged commit 237152f into FRRouting:master Sep 30, 2024
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@rzalamena rzalamena deleted the calloc-warning-fix branch October 9, 2024 14:19
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3 participants