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experimental: adjust weights

This commit is contained in:
Antonis Geralis 2022-09-09 19:52:36 +03:00
parent 52f190d0c8
commit 205afc493f
1 changed files with 13 additions and 13 deletions
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26
drchaos/mutator.nim
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@ -18,9 +18,9 @@ template `+!`(p: pointer; s: int): untyped =
cast[pointer](cast[ByteAddress](p) +% s)
const
RandomToDefaultRatio = 100 # The chance of returning an uninitalized type.
DefaultMutateWeight = 1_000_000 # The default weight of items sampled by the reservoir sampler.
MaxInitializeDepth = 200 # The post-processor prunes nested non-copyMem types.
RandomToDefaultRatio = 100 # The chance of returning an uninitalized type.
DefaultMutateWeight = 125_000 # The default weight of items sampled by the reservoir sampler.
MaxInitializeDepth = 200 # The post-processor prunes nested non-copyMem types.
type
ByteSized* = int8|uint8|byte|bool|char # Run LibFuzzer's mutate for sequences of these types.
@ -262,7 +262,7 @@ template sampleAttempt(call: untyped) =
proc sample[T: distinct](x: T; s: var Sampler; r: var Rand; res: var int) =
when compiles(mutate(x, 0, false, r)):
sampleAttempt(attempt(s, r, DefaultMutateWeight, res))
sampleAttempt(attempt(s, r, DefaultMutateWeight*sizeof(x), res)) # distinct bool lol
else:
sample(x.distinctBase, s, r, res)
@ -270,39 +270,39 @@ proc sample(x: bool; s: var Sampler; r: var Rand; res: var int) =
sampleAttempt(attempt(s, r, DefaultMutateWeight, res))
proc sample(x: char; s: var Sampler; r: var Rand; res: var int) =
sampleAttempt(attempt(s, r, DefaultMutateWeight, res))
sampleAttempt(attempt(s, r, DefaultMutateWeight*sizeof(x), res))
proc sample[T: enum](x: T; s: var Sampler; r: var Rand; res: var int) =
sampleAttempt(attempt(s, r, DefaultMutateWeight, res))
sampleAttempt(attempt(s, r, DefaultMutateWeight*sizeof(x), res))
proc sample[T](x: set[T]; s: var Sampler; r: var Rand; res: var int) =
sampleAttempt(attempt(s, r, DefaultMutateWeight, res))
sampleAttempt(attempt(s, r, DefaultMutateWeight*sizeof(x), res))
proc sample[T: SomeNumber](x: T; s: var Sampler; r: var Rand; res: var int) =
sampleAttempt(attempt(s, r, DefaultMutateWeight, res))
sampleAttempt(attempt(s, r, DefaultMutateWeight*sizeof(x), res))
proc sample[T](x: seq[T]; s: var Sampler; r: var Rand; res: var int) =
sampleAttempt(attempt(s, r, DefaultMutateWeight, res))
sampleAttempt(attempt(s, r, DefaultMutateWeight*sizeof(x), res))
proc sample(x: string; s: var Sampler; r: var Rand; res: var int) =
sampleAttempt(attempt(s, r, DefaultMutateWeight, res))
sampleAttempt(attempt(s, r, DefaultMutateWeight*sizeof(x), res))
proc sample[T: tuple|object](x: T; s: var Sampler; r: var Rand; res: var int) =
when compiles(mutate(x, 0, false, r)):
sampleAttempt(attempt(s, r, DefaultMutateWeight, res))
sampleAttempt(attempt(s, r, DefaultMutateWeight*sizeof(x), res))
else:
for v in fields(x):
sample(v, s, r, res)
proc sample[T](x: ref T; s: var Sampler; r: var Rand; res: var int) =
when compiles(mutate(x, 0, false, r)):
sampleAttempt(attempt(s, r, DefaultMutateWeight, res))
sampleAttempt(attempt(s, r, DefaultMutateWeight*sizeof(x), res))
else:
if x != nil: sample(x[], s, r, res)
proc sample[S, T](x: array[S, T]; s: var Sampler; r: var Rand; res: var int) =
when compiles(mutate(x, 0, false, r)):
sampleAttempt(attempt(s, r, DefaultMutateWeight, res))
sampleAttempt(attempt(s, r, DefaultMutateWeight*sizeof(x), res))
else:
for i in low(x)..high(x):
sample(x[i], s, r, res)