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fixes #12264 [backport] (#12302)

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This commit is contained in:
Andreas Rumpf
2019-09-30 21:44:24 +02:00
committed by GitHub
parent 72acf5de94
commit dd082b6ec8
3 changed files with 17 additions and 10 deletions
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11
compiler/sizealignoffsetimpl.nim
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@@ -21,6 +21,7 @@ const
szUnknownSize* = -3
szIllegalRecursion* = -2
szUncomputedSize* = -1
szTooBigSize* = -4
type IllegalTypeRecursionError = object of Exception
@@ -33,14 +34,14 @@ type
offset: int
proc inc(arg: var OffsetAccum; value: int) =
if unlikely(value == szIllegalRecursion): raiseIllegalTypeRecursion()
if unlikely(value == szIllegalRecursion): raiseIllegalTypeRecursion()
if value == szUnknownSize or arg.offset == szUnknownSize:
arg.offset = szUnknownSize
else:
arg.offset += value
proc alignmentMax(a,b: int): int =
if unlikely(a == szIllegalRecursion or b == szIllegalRecursion): raiseIllegalTypeRecursion()
if unlikely(a == szIllegalRecursion or b == szIllegalRecursion): raiseIllegalTypeRecursion()
if a == szUnknownSize or b == szUnknownSize:
szUnknownSize
else:
@@ -57,7 +58,7 @@ proc align(arg: var OffsetAccum; value: int) =
proc mergeBranch(arg: var OffsetAccum; value: OffsetAccum) =
if value.maxAlign == szUnknownSize or arg.maxAlign == szUnknownSize or
value.offset == szUnknownSize or arg.offset == szUnknownSize:
value.offset == szUnknownSize or arg.offset == szUnknownSize:
arg.maxAlign = szUnknownSize
arg.offset = szUnknownSize
else:
@@ -111,7 +112,7 @@ proc setOffsetsToUnknown(n: PNode) =
for i in 0 ..< safeLen(n):
setOffsetsToUnknown(n[i])
proc computeObjectOffsetsFoldFunction(conf: ConfigRef; n: PNode, packed: bool, accum: var OffsetAccum): void =
proc computeObjectOffsetsFoldFunction(conf: ConfigRef; n: PNode, packed: bool, accum: var OffsetAccum) =
## ``offset`` is the offset within the object, after the node has been written, no padding bytes added
## ``align`` maximum alignment from all sub nodes
assert n != nil
@@ -256,7 +257,7 @@ proc computeSizeAlign(conf: ConfigRef; typ: PType) =
typ.size = elemSize
typ.align = int16(elemSize)
else:
typ.size = toInt64(lengthOrd(conf, typ.sons[0]) * int32(elemSize))
typ.size = toInt64Checked(lengthOrd(conf, typ.sons[0]) * int32(elemSize), szTooBigSize)
typ.align = typ.sons[1].align
of tyUncheckedArray: