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initial support for integrated fuzzing #20725

Merged
merged 13 commits into from
Jul 23, 2024
Merged

initial support for integrated fuzzing #20725

merged 13 commits into from
Jul 23, 2024

Commits on Jul 22, 2024

  1. initial support for integrated fuzzing 

    * Add the `-ffuzz` and `-fno-fuzz` CLI arguments.
* Detect fuzz testing flags from zig cc.
* Set the correct clang flags when fuzz testing is requested. It can be
  combined with TSAN and UBSAN.
* Compilation: build fuzzer library when needed which is currently an
  empty zig file.
* Add optforfuzzing to every function in the llvm backend for modules
  that have requested fuzzing.
* In ZigLLVMTargetMachineEmitToFile, add the optimization passes for
  sanitizer coverage.
* std.mem.eql uses a naive implementation optimized for fuzzing when
  builtin.fuzz is true.

Tracked by #20702
    @andrewrk
    andrewrk committed Jul 22, 2024
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  2. add the build system API for enabling fuzzing

    @andrewrk
    andrewrk committed Jul 22, 2024
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  3. avoid depending on a zig1.wasm update

    @andrewrk
    andrewrk committed Jul 22, 2024
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  4. add libfuzzer to linking

    @andrewrk
    andrewrk committed Jul 22, 2024
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  5. libfuzzer: implement enough symbols for hello world

    @andrewrk
    andrewrk committed Jul 22, 2024
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  6. add new builtin: @disableInstrumentation 

    This is needed to ensure that start code does not try to access thread
local storage before it has set up thread local storage.
    @andrewrk
    andrewrk committed Jul 22, 2024
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  7. update start code to use @disableInstrumentation 

    This prevents it from trying to access thread local storage before it
has set up thread local storage, particularly when code coverage
instrumentation is enabled.
    @andrewrk
    andrewrk committed Jul 22, 2024
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  8. ZigLLVMTargetMachineEmitToFile: make sancov enable the options

    @andrewrk
    andrewrk committed Jul 22, 2024
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  9. libfuzzer: log all the libcalls to stderr

    @andrewrk
    andrewrk committed Jul 22, 2024
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  10. update zig1.wasm

    @andrewrk
    andrewrk committed Jul 22, 2024
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  11. std.mem: delete workaround now that zig1.wasm is updated

    @andrewrk
    andrewrk committed Jul 22, 2024
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  12. Compilation: fix regression in addCCArgs 

    `-fno-sanitize=function` must come after `-fsanitize=undefined` or it
has no effect.
    @andrewrk
    andrewrk committed Jul 22, 2024
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  13. fix macho linker integration with libfuzzer

    @andrewrk
    andrewrk committed Jul 22, 2024
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