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v0.1.1

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Antonis Geralis 2022-08-28 12:33:59 +03:00
parent a4cbf3e6c6
commit 72664f3d7e
2 changed files with 10 additions and 6 deletions
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2
drchaos.nimble
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@ -1,6 +1,6 @@
mode = ScriptMode.Verbose mode = ScriptMode.Verbose
version = "0.1.0" version = "0.1.1"
author = "Dr. Chaos Team" author = "Dr. Chaos Team"
description = "A powerful and easy-to-use fuzzing framework in Nim for C/C++/Obj-C targets" description = "A powerful and easy-to-use fuzzing framework in Nim for C/C++/Obj-C targets"
license = "Apache License 2.0" license = "Apache License 2.0"

14
drchaos/mutator.nim
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@ -11,9 +11,6 @@ when (NimMajor, NimMinor, NimPatch) < (1, 7, 1):
result = cast[T](r.next shr (sizeof(uint64) - sizeof(T))*8) result = cast[T](r.next shr (sizeof(uint64) - sizeof(T))*8)
when not defined(fuzzerStandalone): when not defined(fuzzerStandalone):
proc LLVMFuzzerInitialize(): cint {.exportc.} =
{.emit: "N_CDECL(void, NimMain)(void); NimMain();".}
proc mutate(data: ptr UncheckedArray[byte], len, maxLen: int): int {. proc mutate(data: ptr UncheckedArray[byte], len, maxLen: int): int {.
importc: "LLVMFuzzerMutate".} importc: "LLVMFuzzerMutate".}
@ -525,12 +522,18 @@ proc runPostProcessor*[S, T](x: var array[S, T], depth: int; r: var Rand) =
for i in low(x)..high(x): for i in low(x)..high(x):
runPostProcessor(x[i], depth-1, r) runPostProcessor(x[i], depth-1, r)
proc myMutator[T](x: var T; sizeIncreaseHint: Natural; r: var Rand) {.nimcall.} = proc myMutator*[T](x: var T; sizeIncreaseHint: Natural; r: var Rand) {.nimcall.} =
runMutator(x, sizeIncreaseHint, true, r) runMutator(x, sizeIncreaseHint, true, r)
when T is PostProcessTypes: when T is PostProcessTypes:
runPostProcessor(x, MaxInitializeDepth, r) runPostProcessor(x, MaxInitializeDepth, r)
template mutatorImpl(target, mutator, typ: untyped) = template initImpl*() =
proc NimMain() {.importc: "NimMain".}
proc LLVMFuzzerInitialize(): cint {.exportc.} =
NimMain()
template mutatorImpl*(target, mutator, typ: untyped) =
{.pragma: nocov, codegenDecl: "__attribute__((no_sanitize(\"coverage\"))) $# $#$#".} {.pragma: nocov, codegenDecl: "__attribute__((no_sanitize(\"coverage\"))) $# $#$#".}
{.pragma: nosan, codegenDecl: "__attribute__((disable_sanitizer_instrumentation)) $# $#$#".} {.pragma: nosan, codegenDecl: "__attribute__((disable_sanitizer_instrumentation)) $# $#$#".}
@ -598,6 +601,7 @@ template mutatorImpl(target, mutator, typ: untyped) =
proc commonImpl(target, mutator: NimNode): NimNode = proc commonImpl(target, mutator: NimNode): NimNode =
let typ = getTypeImpl(target).params[^1][1] let typ = getTypeImpl(target).params[^1][1]
result = getAst(mutatorImpl(target, mutator, typ)) result = getAst(mutatorImpl(target, mutator, typ))
result.add getAst(initImpl())
macro defaultMutator*(target: proc) = macro defaultMutator*(target: proc) =
## Implements the interface for running LibFuzzer's fuzzing loop, where func `target`'s ## Implements the interface for running LibFuzzer's fuzzing loop, where func `target`'s