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+This directory contains tests to be run with clang's libFuzzer. It will generate data, pass this
+data to the function
+ LLVMFuzzerTestOneInput(const char *Data, size_t Size)
+of the test and track the code execution. Should the test crash, libFuzzer will provide you with the
+data which triggered the crash. You can then use this to debug and fix the called code.
+! Please note: The purpose of fuzz testing is to find unexpected code paths. Running fuzz tests may!
+! result in unforeseen bevavior, including loss of data. Consider running the tests in an isolated !
+! environment, e.g. on a virtual machine. You have been warned. !
+To run a test with libFuzzer:
+1. Install libFuzzer, e.g. from the repositories of the Linux distribution you are using.
+2. Make sure clang and clang++ from this version of clang are found in PATH.
+3. Configure Qt with
+ -platform linux-clang -coverage trace-pc-guard
+ to add the needed code coverage instrumentation. Since speed of execution is crucial for fuzz
+ testing, it's recommendable to also use the switches
+ -release -static
+ It might also make sense to add sanitzers by passing
+ -sanitize <...>
+4. Build Qt.
+5. Build one of the tests using this Qt build.
+6. Execute the resulting executable.
+ Depending on the expected input format of the tested function, you will get results faster if
+ you:
+ * provide a set of interesting input data by passing the path of a directory which contains
+ these data, each in one file. You can find such datasets in the subdirectory "testcases".
+ * pass a so-called dictionary listing keywords of the input format using
+ -dict=<dictionary file>
+ A couple of such dictionaries are provided by AFL (
+ * tell libFuzzer to generate only ASCII data using
+ -only_ascii=1
+For further info, see