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| author | Andrew Kelley <andrew@ziglang.org> | 2024-08-28 14:52:57 -0700 |
|---|---|---|
| committer | Andrew Kelley <andrew@ziglang.org> | 2024-08-28 18:07:13 -0700 |
| commit | 1bec824cadba7870d6e2b52588d782f32be44866 (patch) | |
| tree | 82822dabd0f63d294221220b4fddb31aa98c880d /lib/std/Build/Step/Compile.zig | |
| parent | 88bba4c15463796c0b89a4d097366b11bdb7679c (diff) | |
| download | zig-1bec824cadba7870d6e2b52588d782f32be44866.tar.gz zig-1bec824cadba7870d6e2b52588d782f32be44866.zip | |
LLVM: disable inline 8-bit counters when using trace pc guard
Diffstat (limited to 'lib/std/Build/Step/Compile.zig')
| -rw-r--r-- | lib/std/Build/Step/Compile.zig | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/lib/std/Build/Step/Compile.zig b/lib/std/Build/Step/Compile.zig index 1aeebbb55b..922d64c728 100644 --- a/lib/std/Build/Step/Compile.zig +++ b/lib/std/Build/Step/Compile.zig @@ -218,12 +218,18 @@ no_builtin: bool = false, /// Managed by the build runner, not user build script. zig_process: ?*Step.ZigProcess, -/// Enables deprecated coverage instrumentation that is only useful if you -/// are using third party fuzzers that depend on it. Otherwise, slows down -/// the instrumented binary with unnecessary function calls. +/// Enables coverage instrumentation that is only useful if you are using third +/// party fuzzers that depend on it. Otherwise, slows down the instrumented +/// binary with unnecessary function calls. /// -/// To enable fuzz testing instrumentation on a compilation, see the `fuzz` -/// flag in `Module`. +/// This kind of coverage instrumentation is used by AFLplusplus v4.21c, +/// however, modern fuzzers - including Zig - have switched to using "inline +/// 8-bit counters" or "inline bool flag" which incurs only a single +/// instruction for coverage, along with "trace cmp" which instruments +/// comparisons and reports the operands. +/// +/// To instead enable fuzz testing instrumentation on a compilation using Zig's +/// builtin fuzzer, see the `fuzz` flag in `Module`. sanitize_coverage_trace_pc_guard: ?bool = null, pub const ExpectedCompileErrors = union(enum) { |