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[libFuzzer] make sure that -reduce_inputs=1 deletes redundant files in the corpus

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llvm-svn: 307875
This commit is contained in:
Kostya Serebryany 2017-07-13 01:56:37 +00:00
parent 211aa642c6
commit 7653d30e45
2 changed files with 21 additions and 3 deletions
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11
lib/Fuzzer/FuzzerCorpus.h
View File

@ -139,6 +139,9 @@ class InputCorpus {
}
void Replace(InputInfo *II, const Unit &U) {
assert(II->U.size());
Hashes.erase(Sha1ToString(II->Sha1));
DeleteFile(*II);
ComputeSHA1(U.data(), U.size(), II->Sha1);
Hashes.insert(Sha1ToString(II->Sha1));
II->U = U;
@ -182,10 +185,14 @@ class InputCorpus {
Printf("\n");
}
void DeleteInput(size_t Idx) {
InputInfo &II = *Inputs[Idx];
void DeleteFile(const InputInfo &II) {
if (!OutputCorpus.empty() && II.MayDeleteFile)
RemoveFile(DirPlusFile(OutputCorpus, Sha1ToString(II.Sha1)));
}
void DeleteInput(size_t Idx) {
InputInfo &II = *Inputs[Idx];
DeleteFile(II);
Unit().swap(II.U);
if (FeatureDebug)
Printf("EVICTED %zd\n", Idx);

13
lib/Fuzzer/test/reduce_inputs.test
View File

@ -1,2 +1,13 @@
# Test -reduce_inputs=1
RUN: rm -rf %t/C
RUN: mkdir -p %t/C
RUN: LLVMFuzzer-ShrinkControlFlowSimpleTest -exit_on_item=0eb8e4ed029b774d80f2b66408203801cb982a60 -reduce_inputs=1 -runs=1000000 %t/C 2>&1 | FileCheck %s
CHECK: INFO: found item with checksum '0eb8e4ed029b774d80f2b66408203801cb982a60'
RUN: LLVMFuzzer-ShrinkControlFlowSimpleTest -exit_on_item=0eb8e4ed029b774d80f2b66408203801cb982a60 -reduce_inputs=1 -runs=1000000 2>&1 | FileCheck %s
# Test that reduce_inputs deletes redundant files in the corpus.
RUN: LLVMFuzzer-ShrinkControlFlowSimpleTest -runs=0 %t/C 2>&1 | FileCheck %s --check-prefix=COUNT
COUNT: READ units: 3