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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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e52320c3b2
This makes an effort to find cases where the argument to sizeof is wrong in memory allocation functions by checking the type of the allocated memory when it is a double pointer and ensuring the sizeof argument takes a pointer to the the memory being allocated. There are false positives in cases the sizeof argument is not used in constructing the return value. Signed-off-by: Himangi Saraogi <himangi774@gmail.com> Acked-by: Julia Lawall <julia.lawall@lip6.fr> Signed-off-by: Michal Marek <mmarek@suse.cz>
77 lines
1.7 KiB
Plaintext
77 lines
1.7 KiB
Plaintext
/// Use ARRAY_SIZE instead of dividing sizeof array with sizeof an element
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///
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//# This makes an effort to find cases where the argument to sizeof is wrong
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//# in memory allocation functions by checking the type of the allocated memory
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//# when it is a double pointer and ensuring the sizeof argument takes a pointer
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//# to the the memory being allocated. There are false positives in cases the
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//# sizeof argument is not used in constructing the return value. The result
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//# may need some reformatting.
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//
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// Confidence: Moderate
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// Copyright: (C) 2014 Himangi Saraogi. GPLv2.
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// Comments:
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// Options:
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virtual patch
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virtual context
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virtual org
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virtual report
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//----------------------------------------------------------
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// For context mode
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//----------------------------------------------------------
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@depends on context disable sizeof_type_expr@
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type T;
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T **x;
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@@
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x =
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<+...sizeof(
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* T
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)...+>
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//----------------------------------------------------------
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// For patch mode
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//----------------------------------------------------------
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@depends on patch disable sizeof_type_expr@
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type T;
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T **x;
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@@
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x =
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<+...sizeof(
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- T
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+ *x
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)...+>
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//----------------------------------------------------------
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// For org and report mode
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//----------------------------------------------------------
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@r disable sizeof_type_expr@
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type T;
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T **x;
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position p;
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@@
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x =
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<+...sizeof(
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T@p
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)...+>
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@script:python depends on org@
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p << r.p;
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@@
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coccilib.org.print_todo(p[0], "WARNING sizeof argument should be pointer type, not structure type")
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@script:python depends on report@
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p << r.p;
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@@
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msg="WARNING: Use correct pointer type argument for sizeof"
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coccilib.report.print_report(p[0], msg)
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