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8000 fuzz: enable debug symbols in release builds by naoNao89 · Pull Request #8935 · uutils/coreutils · GitHub
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naoNao89
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When fuzzing discovers crashes, backtraces only show memory addresses like 0xc03481 instead of function names and line numbers. Makes debugging really hard.

This adds debug = true to the release profile in fuzz/Cargo.toml. Now backtraces will include 8000 symbols while keeping the release optimizations.

Fixes #5343

Adds debug = true to the [profile.release] section in fuzz/Cargo.toml. This enables generation of backtraces with function names and line numbers when fuzzing discovers crashes, instead of just memory addresses.

Fixes uutils#5343
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codspeed-hq bot commented Oct 17, 2025

CodSpeed Performance Report

Merging #8935 will degrade performances by 2.64%

Comparing naoNao89:fix/fuzz-debug-symbols (11593bd) with main (b990406)

Summary

❌ 1 regression
✅ 105 untouched
⏩ 73 skipped1

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

Benchmark BASE HEAD Change
sort_random_strings 55.3 ms 56.8 ms -2.64%

Footnotes

  1. 73 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports.

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GNU testsuite comparison:

Skipping an intermittent issue tests/misc/tee (passes in this run but fails in the 'main' branch)
Skipping an intermittent issue tests/timeout/timeout (passes in this run but fails in the 'main' branch)

@naoNao89
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This looks like noise. Fuzz has its own workspace, so it can't affect sort performance. The 1.5ms difference is typical for CI runners. All benchmarks actually passed.

@sylvestre sylvestre merged commit 20d6347 into uutils:main Oct 17, 2025
120 of 121 checks passed
@naoNao89 naoNao89 deleted the fix/fuzz-debug-symbols branch October 17, 2025 11:35
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fuzz: generate a proper backtrace

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