[GagaLP]

AdaptiveCpp stores its USM allocation tracker in a function-local static that is initialized by the first allocation, i.e., after the runtime has registered its atexit shutdown handler. Consequently, the tracker is destroyed before the runtime frees its allocations, causing each sycl::free() call during shutdown to operate on a destroyed object. This results in heap corruption, manifesting as a hang on exit in release builds and a segmentation fault in debug builds.

By allocating memory once in the sycl_backend constructor, the tracker is initialized before the shutdown handler is registered and therefore outlives the runtime.

[github-actions]

Check-perf-impact results: (ae6918621b46271c2f10d6eb978fe95d)

❓ No new benchmark data submitted. ❓
Please re-run the microbenchmarks and include the results if your commit could potentially affect performance.

[coveralls]

Coverage Report for CI Build 38424719415

Coverage remained the same at 95.052%

Details

• Coverage remained the same as the base build.
• Patch coverage: No coverable lines changed in this PR.
• No coverage regressions found.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

No coverage regressions found.

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Coverage Stats

Relevant Lines:	7264
Covered Lines:	7159
Line Coverage:	98.55%
Relevant Branches:	3690
Covered Branches:	3253
Branch Coverage:	88.16%
Branches in Coverage %:	Yes
Coverage Strength:	1818037.98 hits per line

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💛 - Coveralls

[PeterTh]

LGTM