[all-commits] [llvm/llvm-project] 23bee0: [fuzzer] Add basic support for emscripten.

[jonathanmetzman via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 23bee0b0cf7a1af084ea06f2b7dfde1767837084
      https://github.com/llvm/llvm-project/commit/23bee0b0cf7a1af084ea06f2b7dfde1767837084
  Author: Jonathan Metzman <metzman at chromium.org>
  Date:   2019-12-12 (Thu, 12 Dec 2019)

  Changed paths:
    M compiler-rt/lib/fuzzer/FuzzerDefs.h
    M compiler-rt/lib/fuzzer/FuzzerDriver.cpp
    M compiler-rt/lib/fuzzer/FuzzerExtFunctionsWeak.cpp
    M compiler-rt/lib/fuzzer/FuzzerExtraCounters.cpp
    M compiler-rt/lib/fuzzer/FuzzerUtilLinux.cpp
    M compiler-rt/lib/fuzzer/FuzzerUtilPosix.cpp

  Log Message:
  -----------
  [fuzzer] Add basic support for emscripten.

Summary:
Add basic support for emscripten.

This enables libFuzzer to build (using build.sh) for emscripten and fuzz
a target compiled with
-fsanitize-coverage=inline-8bit-counters.

Basic fuzzing and bug finding work with this commit.
RSS limit and timeouts will not work because they depend on system
functions that are not implemented/widely supported in emscripten.

Reviewers: kcc, vitalybuka, hctim

Reviewed By: hctim

Subscribers: #sanitizers, llvm-commits

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D71285