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…_gettime - snapshot/map the vDSO so DWFL can surface proper kernel helper symbols - add workspace remapping hooks to resolve virtiofs-hosted binaries This helps with the MacOS dev workflow
- Extract vdso file info to a separate RAII class - Fix compilation warnings
r1viollet
commented
Dec 4, 2025
| DsoOrigin::kProcMaps}; | ||
| } | ||
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| void DsoHdr::init_workspace_remap() { |
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sorry for this complexity, though this allows me to work with docker, it should be a no-op for folks
Benchmark results for collatzParameters
SummaryFound 0 performance improvements and 0 performance regressions! Performance is the same for 1 metrics, 0 unstable metrics. See unchanged results
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Benchmark results for BadBoggleSolver_runParameters
SummaryFound 0 performance improvements and 0 performance regressions! Performance is the same for 1 metrics, 0 unstable metrics. See unchanged results
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nsavoire
reviewed
Dec 4, 2025
| addr &= top_byte_mask; | ||
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| constexpr unsigned canonical_bits = 48; | ||
| if (canonical_bits < k_top_byte_shift) { |
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I don't understand the logic of this function:
this condition is always true, therefore the previous masking operation is unnecessary
nsavoire
approved these changes
Dec 4, 2025
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I'll work on splitting the PR |
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What does this PR do?
Motivation
Working from MacOS aarch64, I was not able to get proper frames.
With these changes, I no longer have failures on Simple Malloc tests.
Additional Notes
This will require a branch in
ddprof-buildto cache elfutils:https://github.com/DataDog/ddprof-build/pull/152
How to test the change?
Describe here in detail how the change can be validated. This is a great section to call out specific tests you've added or improved, or to acknowledge code sections which are particularly difficult to test.