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| author | Julia Lawall <julia@diku.dk> | 2009-10-17 08:43:17 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-10-17 09:29:10 +0200 |
| commit | f39cdf25bf77219676ec5360980ac40b1a7e144a (patch) | |
| tree | 2143a3653933efc5ffacea647ce8be72952b3a44 /Documentation/voyager.txt | |
| parent | 434a83c3fbb951908a3a52040f7f0e0b8ba00dd0 (diff) | |
perf tools: Move dereference after NULL test
In each case, if the NULL test on thread is needed, then the
dereference should be after the NULL test.
A simplified version of the semantic match that detects this
problem is as follows (http://coccinelle.lip6.fr/):
// <smpl>
@match exists@
expression x, E;
identifier fld;
@@
* x->fld
... when != \(x = E\|&x\)
* x == NULL
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
LKML-Reference: <Pine.LNX.4.64.0910170842500.9213@ask.diku.dk>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'Documentation/voyager.txt')
0 files changed, 0 insertions, 0 deletions