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Improve libfuzz integration (#2916)

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- Allow command line tools to build together with libfuzzer driver.
  Compile everything with `-fsanitize=fuzzer-no-link` to prevent
  linking in libfuzzers's `main` symbol in all executables (causing
  duplicate symbol errors in command line tools), and add
  `-fsanitize=fuzzer` to the libfuzzer driver only.

- Make ASan optional when building with libfuzzer to allow the user
  to choose freely from available sanitizers (e.g., UBSan, MSan,
  HWASan).

- Stabilize libfuzzer by resetting PRNG seed at every invocation.

JerryScript-DCO-1.0-Signed-off-by: Akos Kiss akiss@inf.u-szeged.hu
This commit is contained in:
Akos Kiss
2019-06-19 11:34:06 +02:00
committed by Robert Fancsik
parent 3953fee035
commit 8ee8bc2767
4 changed files with 6 additions and 13 deletions
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docs/01.GETTING-STARTED.md
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@@ -123,7 +123,7 @@ allocator is used.
**To build with libfuzzer support**
```bash
CC=clang python tools/build.py --libfuzzer=on --lto=off
CC=clang python tools/build.py --libfuzzer=on --compile-flag=-fsanitize=address --lto=off
```
Check the documentation of libfuzzer to get the runtime settings of the created fuzzer