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285f1f0e41
Introduce -mllvm -sanitizer-coverage-8bit-counters=1 which adds imprecise thread-unfriendly 8-bit coverage counters. The run-time library maps these 8-bit counters to 8-bit bitsets in the same way AFL (http://lcamtuf.coredump.cx/afl/technical_details.txt) does: counter values are divided into 8 ranges and based on the counter value one of the bits in the bitset is set. The AFL ranges are used here: 1, 2, 3, 4-7, 8-15, 16-31, 32-127, 128+. These counters provide a search heuristic for single-threaded coverage-guided fuzzers, we do not expect them to be useful for other purposes. Depending on the value of -fsanitize-coverage=[123] flag, these counters will be added to the function entry blocks (=1), every basic block (=2), or every edge (=3). Use these counters as an optional search heuristic in the Fuzzer library. Add a test where this heuristic is critical. llvm-svn: 231166
23 lines
1.1 KiB
Plaintext
23 lines
1.1 KiB
Plaintext
RUN: ./LLVMFuzzer-SimpleTest 2>&1 | FileCheck %s --check-prefix=SimpleTest
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SimpleTest: Found the target, exiting
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RUN: not ./LLVMFuzzer-InfiniteTest -timeout=2 2>&1 | FileCheck %s --check-prefix=InfiniteTest
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InfiniteTest: ALARM: working on the last Unit for
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InfiniteTest-NOT: CRASHED; file written to timeout
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RUN: not ./LLVMFuzzer-TimeoutTest -timeout=5 2>&1 | FileCheck %s --check-prefix=TimeoutTest
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TimeoutTest: ALARM: working on the last Unit for
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TimeoutTest: CRASHED; file written to timeout
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RUN: not ./LLVMFuzzer-NullDerefTest 2>&1 | FileCheck %s --check-prefix=NullDerefTest
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NullDerefTest: CRASHED; file written to crash-
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RUN: not ./LLVMFuzzer-FullCoverageSetTest -timeout=15 -seed=1 -mutate_depth=2 -use_full_coverage_set=1 2>&1 | FileCheck %s --check-prefix=FullCoverageSetTest
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FullCoverageSetTest: BINGO
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RUN: not ./LLVMFuzzer-FourIndependentBranchesTest -timeout=15 -seed=1 -use_coverage_pairs=1 2>&1 | FileCheck %s --check-prefix=FourIndependentBranchesTest
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FourIndependentBranchesTest: BINGO
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RUN: not ./LLVMFuzzer-CounterTest -use_counters=1 -max_len=6 -seed=1 -timeout=15 2>&1 | FileCheck %s --check-prefix=CounterTest
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CounterTest: BINGO
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