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| CodeSonar® 9.2p0 | CONFIDENTIAL | CodeSecure Inc |
The operand to sizeof() is a function parameter that is declared as an array.
A function parameter declared as an array of type T degenerates to a pointer to T. The result of applying sizeof() to such a parameter is therefore the size of the pointer, rather than the size of the entire array.
| クラス名 | sizeof Array Parameter | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 日本語クラス名 | sizeof Array Parameter | ||||||||||||||||||
| クラス分類 | 信頼性 (reliability) | ||||||||||||||||||
| ニーモニック | LANG.TYPE.SAP | ||||||||||||||||||
| カテゴリー |
|
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| 対応言語 | C および C++ で利用可能です。 |
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| 有効/無効設定 | このワーニングクラスのチェックはデフォルトで無効になっており、プロジェクトには非正規の C向けAST
が必要になります。有効にするにはプロジェクト設定ファイル (configuration file) に以下の WARNING_FILTER ルールと
RETAIN_UNNORMALIZED_C_AST 設定を追加してください。
RETAIN_UNNORMALIZED_C_AST = Yes WARNING_FILTER += allow class="sizeof Array Parameter" |
int global_array[] = {1, 2, 3};
int lang_type_sap(int a[5], int b){
int rv = 0;
int local_array[] = {6, 7, 8};
rv += sizeof(a); /* 'sizeof Array Parameter' warning issued here
* - because of array parameter degeneration,
* sizeof(a) == sizeof(int*)
* (not 5*sizeof(int)).
*/
rv += sizeof(global_array); /* ok: global_array is a global,
* not a parameter of lang_type_sap(),
* so this is the size of the entire array.
*/
rv += sizeof(local_array); /* ok: local_array is a local,
* not a parameter of lang_type_sap(),
* so this is the size of the entire array.
*/
rv += sizeof(b); /* ok: b is a parameter of lang_type_sap()
* but is not declared as an array of type.
*/
return rv;
}
設定ファイルの以下のパラメータがこのワーニングクラスのチェックに影響します。
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