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nim-drchaos
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respects userMax

This commit is contained in:
Antonis Geralis 2022-09-07 15:27:51 +03:00
parent a0e4a1c6ed
commit edd11f478b
1 changed files with 4 additions and 4 deletions
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8
drchaos/mutator.nim
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@ -106,7 +106,7 @@ when defined(fuzzerStandalone):
result = value result = value
while result.len != 0 and r.rand(bool): while result.len != 0 and r.rand(bool):
result.delete(rand(r, result.high)) result.delete(rand(r, result.high))
while sizeIncreaseHint > 0 and result.len < sizeIncreaseHint and r.rand(bool): while sizeIncreaseHint > 0 and result.len < min(userMax, sizeIncreaseHint) and r.rand(bool):
let index = rand(r, result.len) let index = rand(r, result.len)
result.insert(r.rand(char), index) result.insert(r.rand(char), index)
if result != value: if result != value:
@ -122,7 +122,7 @@ when defined(fuzzerStandalone):
result = value result = value
while result.len != 0 and r.rand(bool): while result.len != 0 and r.rand(bool):
result.delete(rand(r, result.high)) result.delete(rand(r, result.high))
while sizeIncreaseHint > 0 and result.len < sizeIncreaseHint and r.rand(bool): while sizeIncreaseHint > 0 and result.len < min(userMax, sizeIncreaseHint) and r.rand(bool):
let index = rand(r, result.len) let index = rand(r, result.len)
result.insert(r.rand(T), index) result.insert(r.rand(T), index)
if result != value: if result != value:
@ -145,7 +145,7 @@ else:
else: else:
let oldSize = value.len let oldSize = value.len
result = value result = value
result.setLen(max(1, oldSize + r.rand(sizeIncreaseHint))) result.setLen(clamp(oldSize + r.rand(sizeIncreaseHint), 1, userMax))
result.setLen(mutate(cast[ptr UncheckedArray[byte]](addr result[0]), oldSize, result.len)) result.setLen(mutate(cast[ptr UncheckedArray[byte]](addr result[0]), oldSize, result.len))
when T is bool: when T is bool:
# Fix bool values so UBSan stops complaining. # Fix bool values so UBSan stops complaining.
@ -159,7 +159,7 @@ else:
else: else:
let oldSize = value.len let oldSize = value.len
result = value result = value
result.setLen(max(1, oldSize + r.rand(sizeIncreaseHint))) result.setLen(clamp(oldSize + r.rand(sizeIncreaseHint), 1, userMax))
result.setLen(mutate(cast[ptr UncheckedArray[byte]](addr result[0]), oldSize, result.len)) result.setLen(mutate(cast[ptr UncheckedArray[byte]](addr result[0]), oldSize, result.len))
proc mutateUtf8String*(value: sink string; userMax, sizeIncreaseHint: int; r: var Rand): string {.inline.} = proc mutateUtf8String*(value: sink string; userMax, sizeIncreaseHint: int; r: var Rand): string {.inline.} =