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fb: use calloc() instead of malloc() 

Using calloc() instead of malloc() as preventive measure, so there
never can be any hidden bugs or leaks due uninitialized memory.

The extra cost of using this compiler intrinsic should be practically
impossible to measure - in many cases a good compiler can even deduce
if certain areas really don't need to be zero'd (because they're written
to right after allocation) and create more efficient machine code.

The code pathes in question are pretty cold anyways, so it's probably
not worth even thinking about potential extra runtime costs.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
This commit is contained in:
Enrico Weigelt, metux IT consult 2025-04-10 19:13:18 +02:00
parent 7a8b8e110e
commit c4c5f03cb7
1 changed files with 1 additions and 2 deletions
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3
fb/fboverlay.c
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@ -260,7 +260,6 @@ fbOverlayFinishScreenInit(ScreenPtr pScreen,
int nvisuals; int nvisuals;
int ndepths; int ndepths;
VisualID defaultVisual; VisualID defaultVisual;
FbOverlayScrPrivPtr pScrPriv;
if (!dixRegisterPrivateKey if (!dixRegisterPrivateKey
(&fbOverlayScreenPrivateKeyRec, PRIVATE_SCREEN, 0)) (&fbOverlayScreenPrivateKeyRec, PRIVATE_SCREEN, 0))
@ -269,7 +268,7 @@ fbOverlayFinishScreenInit(ScreenPtr pScreen,
if (bpp1 == 24 || bpp2 == 24) if (bpp1 == 24 || bpp2 == 24)
return FALSE; return FALSE;
pScrPriv = malloc(sizeof(FbOverlayScrPrivRec)); FbOverlayScrPrivPtr pScrPriv = calloc(1, sizeof(FbOverlayScrPrivRec));
if (!pScrPriv) if (!pScrPriv)
return FALSE; return FALSE;