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araq
2026-04-02 11:35:34 +02:00
parent 7ee4b42929
commit 819f489d2b
1 changed files with 7 additions and 4 deletions
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11
lib/system/alloc.nim
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@@ -958,8 +958,8 @@ proc rawAlloc(a: var MemRegion, requestedSize: int, alignment: int = 0): pointer
sysAssert(allocInv(a), "rawAlloc: before listRemove test")
listRemove(a.freeSmallChunks[s], c)
sysAssert(allocInv(a), "rawAlloc: end listRemove test")
sysAssert(((cast[int](result) and PageMask) - smallChunkOverhead() - alignOff) %%
size == 0, "rawAlloc 21")
sysAssert(((cast[int](result) and PageMask) - smallChunkOverhead()) %%
MemAlign == 0, "rawAlloc 21")
sysAssert(allocInv(a), "rawAlloc: end small size")
inc a.occ, size
trackSize(c.size)
@@ -1110,8 +1110,11 @@ when not defined(gcDestructors):
var c = cast[PSmallChunk](c)
var offset = (cast[int](p) and (PageSize-1)) -%
smallChunkOverhead()
result = (c.acc.int >% offset) and (offset %% c.size == 0) and
(cast[ptr FreeCell](p).zeroField >% 1)
if c.acc.int >% offset:
let alignOff = c.acc.int mod c.size
result = (offset >= alignOff) and
((offset -% alignOff) %% c.size == 0) and
(cast[ptr FreeCell](p).zeroField >% 1)
else:
var c = cast[PBigChunk](c)
# prev stores the aligned data pointer set during rawAlloc