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55 lines
3.2 KiB
55 lines
3.2 KiB
4 months ago
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# Tests the data flow tracer.
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REQUIRES: linux, x86_64
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# Build the tracer and the test.
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RUN: %no_fuzzer_cpp_compiler -c -fno-sanitize=all -fsanitize=dataflow -mllvm -dfsan-fast-16-labels %S/../../lib/fuzzer/dataflow/DataFlow.cpp -o %t-DataFlow.o
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RUN: %no_fuzzer_cpp_compiler -c -fno-sanitize=all -fPIC %S/../../lib/fuzzer/dataflow/DataFlowCallbacks.cpp -o %t-DataFlowCallbacks.o
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RUN: %no_fuzzer_cpp_compiler -fno-sanitize=all -fsanitize=dataflow -mllvm -dfsan-fast-16-labels -fsanitize-coverage=trace-pc-guard,pc-table,bb,trace-cmp %S/OnlySomeBytesTest.cpp %t-DataFlow*.o -o %t-DFT
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RUN: %cpp_compiler %S/OnlySomeBytesTest.cpp -o %t-Fuzz
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# Prepare the inputs.
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RUN: rm -rf %t/*
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RUN: mkdir -p %t/IN
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RUN: echo -n 0123456789012345678901234567890123456789012345678901234567891234 > %t/IN/6
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RUN: cat %t/IN/6 %t/IN/6 %t/IN/6 %t/IN/6 > %t/IN/8
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RUN: cat %t/IN/8 %t/IN/8 %t/IN/8 %t/IN/8 > %t/IN/10
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RUN: cat %t/IN/10 %t/IN/10 %t/IN/10 %t/IN/10 > %t/IN/12
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# %t/IN/12 is 4096 bytes-long.
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RUN: %t-Fuzz -focus_function='fB(unsigned char const*)' -runs=0 %t/IN 2>&1 | FileCheck %s --check-prefix=FOCUS_fB
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FOCUS_fB: Focus function is set to 'fB(unsigned char const*)'
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RUN: %t-Fuzz -focus_function=f0 -runs=0 %t/IN 2>&1 | FileCheck %s --check-prefix=NO_FOCUSED_INPUT
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NO_FOCUSED_INPUT: Focus function is set to 'f0'
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NO_FOCUSED_INPUT: INFO: 0/2 inputs touch the focus function
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RUN: (echo -n ABC; cat %t/IN/12) > %t/IN/ABC
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RUN: %t-Fuzz -focus_function=f0 -runs=0 %t/IN 2>&1 | FileCheck %s --check-prefix=ONE_FOCUSED_INPUT
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ONE_FOCUSED_INPUT: INFO: 1/3 inputs touch the focus function
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RUN: rm -rf %t/IN_DFT
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RUN: %t-Fuzz -collect_data_flow=%t-DFT %t/IN -data_flow_trace=%t/IN_DFT > /dev/null 2>&1
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# Repeat twice to make sure that the inputs with DFT are not removed from the corpus.
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RUN: %t-Fuzz -focus_function=f0 -data_flow_trace=%t/IN_DFT -runs=100 %t/IN 2>&1 | FileCheck %s --check-prefix=HAVE_DFT
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RUN: %t-Fuzz -focus_function=f0 -data_flow_trace=%t/IN_DFT -runs=100 %t/IN 2>&1 | FileCheck %s --check-prefix=HAVE_DFT
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HAVE_DFT: INFO: 1/{{.*}} inputs have the Data Flow Trace
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# Collect DFT, then use it.
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RUN: rm -rf %t/C %t/C1 && mkdir %t/C %t/C1 && cp %t/IN/* %t/C
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RUN: rm -rf %t/C_DFT && %t-Fuzz -collect_data_flow=%t-DFT %t/C -data_flow_trace=%t/C_DFT > /dev/null 2>&1
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RUN: not %t-Fuzz -focus_function=f0 -data_flow_trace=%t/C_DFT -seed=1 -runs=1000000 -use_value_profile=1 %t/C1 %t/C 2> %t/log
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RUN: grep BINGO %t/log
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# Test -focus_function=auto: run 100 times and verify that
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# * 'f0' is the most frequent focus function.
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# * the second most frequent is one of fA/fB/fC in a de-mangled form.
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RUN: %t-Fuzz -focus_function=auto -data_flow_trace=%t/C_DFT -runs=0 %t/C -jobs=100 2>&1 | grep AUTOFOCUS | sort | uniq -c | sort -g -r | head -n 2 | FileCheck %s --check-prefix=AUTOFOCUS
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AUTOFOCUS: INFO: AUTOFOCUS: {{.*}} f0
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AUTOFOCUS: INFO: AUTOFOCUS: {{.*f[ABC]}}(unsigned char const*)
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# Actually execute 50 fuzzing processes with a small number of runs, to test -focus_function=auto for real.
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# We can not test data_flow_trace=auto in just a single run, because it may choose to focus on a wrong function.
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RUN: not %t-Fuzz -focus_function=auto -data_flow_trace=%t/C_DFT %t/C -jobs=50 -runs=200000 -use_value_profile=1 2> %t/log
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RUN: grep BINGO %t/log
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