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Diffstat (limited to 'contrib/coccinelle/unused.cocci')
| -rw-r--r-- | contrib/coccinelle/unused.cocci | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/contrib/coccinelle/unused.cocci b/contrib/coccinelle/unused.cocci new file mode 100644 index 0000000..d84046f --- /dev/null +++ b/contrib/coccinelle/unused.cocci @@ -0,0 +1,43 @@ +// This rule finds sequences of "unused" declerations and uses of a +// variable, where "unused" is defined to include only calling the +// equivalent of alloc, init & free functions on the variable. +@@ +type T; +identifier I; +// STRBUF_INIT, but also e.g. STRING_LIST_INIT_DUP (so no anchoring) +constant INIT_MACRO =~ "_INIT"; +identifier MALLOC1 =~ "^x?[mc]alloc$"; +identifier INIT_ASSIGN1 =~ "^get_worktrees$"; +identifier INIT_CALL1 =~ "^[a-z_]*_init$"; +identifier REL1 =~ "^[a-z_]*_(release|reset|clear|free)$"; +identifier REL2 =~ "^(release|clear|free)_[a-z_]*$"; +@@ + +( +- T I; +| +- T I = { 0 }; +| +- T I = INIT_MACRO; +| +- T I = MALLOC1(...); +| +- T I = INIT_ASSIGN1(...); +) + +<... when != \( I \| &I \) +( +- \( INIT_CALL1 \)( \( I \| &I \), ...); +| +- I = \( INIT_ASSIGN1 \)(...); +| +- I = MALLOC1(...); +) +...> + +( +- \( REL1 \| REL2 \)( \( I \| &I \), ...); +| +- \( REL1 \| REL2 \)( \( &I \| I \) ); +) + ... when != \( I \| &I \) |