fix threading, and performance issues across NVQIR and REST helpers by InboraStudio · Pull Request #4510 · NVIDIA/cuda-quantum

InboraStudio · 2026-05-13T05:06:04Z

fix: add null guards for getenv("HOME") to prevent crashes in container environments (Anyon, IQM, Quantinuum)
fix(bug): make refreshTokens mutex static to ensure proper thread synchronization
fix(bug): prevent double-close (UB) by removing close() after fclose() in IQMServerHelper
fix(bug): untrack Array before deletion in NVQIR to prevent use-after-free
fix(bug): use resize() instead of reserve() before index assignment in NVQIR array conversion
perf(core): replace floating-point pow() with bitwise shift for exact integer computation
chore(logging): add debug logging in empty catch blocks for tracer mode noise resolution

copy-pr-bot · 2026-05-13T05:06:08Z

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…oss NVQIR and REST helpers - fix(security): add null guards for getenv("HOME") to prevent crashes in container environments (Anyon, IQM, Quantinuum) - fix(bug): make refreshTokens mutex static to ensure proper thread synchronization - fix(bug): prevent double-close (UB) by removing close() after fclose() in IQMServerHelper - fix(bug): untrack Array before deletion in NVQIR to prevent use-after-free - fix(bug): use resize() instead of reserve() before index assignment in NVQIR array conversion - perf(core): replace floating-point pow() with bitwise shift for exact integer computation - chore(logging): add debug logging in empty catch blocks for tracer mode noise resolution Signed-off-by: Dr Chamyoung 医者 <alokads06@gmail.com>

mitchdz · 2026-05-13T05:24:51Z

 /// Refresh the api key and refresh-token
 void AnyonServerHelper::refreshTokens(bool force_refresh) {
-  std::mutex m;
+


Why is there whitepsace here?

mitchdz · 2026-05-13T05:25:26Z

  } else {
    // Set alternative iqmclient-cli tokens file path if provided via env var
    auto envTokenFilePath = getenv("IQM_TOKENS_FILE");
+    // FIX(security): guard getenv("HOME") against nullptr (e.g. in containers)


No need for the FIX comments in the code.

mitchdz · 2026-05-13T05:26:33Z

  }

+  // FIX(bug): fclose() already closes the underlying fd from fdopen().
+  // Calling close(fd) after fclose() is a double-close (UB).


Same thing here, no need for comments.

mitchdz · 2026-05-13T05:26:47Z

-  else
-    hwConfig = std::string(getenv("HOME")) + std::string("/.quantinuum_config");
+  else {
+    // FIX(security): guard getenv("HOME") against nullptr (e.g. in containers)


Same as above, no need for comments.

mitchdz · 2026-05-13T05:26:57Z

  }
-  std::mutex m;
+  // FIX(bug): mutex must be static to provide actual cross-thread protection.
+  // A local mutex is created/destroyed per call, giving zero synchronization.


Same as above, no need for comments.

mitchdz · 2026-05-13T05:29:28Z

The changes look fine to me, just some cleanup for the whitespace, and no need for the FIX comments.

…r feedback Signed-off-by: Dr Chamyoung 医者 <alokads06@gmail.com>

InboraStudio · 2026-05-13T06:06:51Z

Sure Thing, I have Fix all Things you have mentioned and if still anything left let me know

InboraStudio · 2026-05-13T16:52:40Z

@mitchdz Let me know

InboraStudio · 2026-05-14T00:55:29Z

@mitchdz

InboraStudio · 2026-05-15T15:31:49Z

The changes look fine to me, just some cleanup for the whitespace, and no need for the FIX comments.

I have changed things please check them

InboraStudio · 2026-05-16T03:03:24Z

@mitchdz Please approve the CI workflows to run.

InboraStudio · 2026-05-17T03:00:30Z

The changes look fine to me, just some cleanup for the whitespace, and no need for the FIX comments.

can you approve workflows to run

github-actions · 2026-05-18T18:21:03Z

CI Summary (`workflow_dispatch`) — ❌ failed

Run #26060818782 · ✅ 11 · ⏩ 1 · ❌ 1 · ⛔ 0

❌ Failed or cancelled

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Top-level jobs (13)

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Job
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github-actions · 2026-05-18T18:22:08Z

CUDA Quantum Docs Bot: A preview of the documentation can be found here.

github-actions · 2026-05-18T22:36:41Z

CUDA Quantum Docs Bot: A preview of the documentation can be found here.

- Replace reserve+operator[] with reserve+emplace_back to avoid UB and double initialization. - Use 1ULL instead of static_cast for bitshifts to align with codebase style. - Add nullptr guards for getenv('HOME') across REST helpers. - Fix local mutex issue in REST helpers by making them static. - Remove double close in IQMServerHelper. - Add exception logging in NVQIR noise tracer. Signed-off-by: Dr Chamyoung 医者 <alokads06@gmail.com>

The 'Build cuda-quantum-dev image (release)' step in the cudaq_image job had `push: true` hardcoded, introduced in efcaf5b when ccache support was added. Every other push directive in docker_images.yml uses `push: ${{ inputs.environment != '' }}`. The unconditional push caused the step to attempt a registry push even during CI-only workflow_dispatch runs where no external registry is configured, failing the docker_image matrix job and tripping the ci_summary aggregator with n_fail=1. Fix: make the push conditional on inputs.environment, consistent with the other three push directives in the same file (lines 190, 368, 722). Signed-off-by: Dr Chamyoung 医者 <alokads06@gmail.com>

InboraStudio · 2026-05-24T03:21:44Z

Rerun the CI

InboraStudio force-pushed the main branch from ad55c3e to ca5f825 Compare May 13, 2026 05:10

mitchdz reviewed May 13, 2026

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style: remove FIX prefix comments and trailing whitespace per reviewe…

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…r feedback Signed-off-by: Dr Chamyoung 医者 <alokads06@gmail.com>

InboraStudio requested a review from mitchdz May 15, 2026 02:15

schweitzpgi reviewed May 18, 2026

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Comment thread runtime/nvqir/NVQIR.cpp Outdated

github-actions Bot pushed a commit that referenced this pull request May 18, 2026

Docs preview for PR #4510.

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github-actions Bot pushed a commit that referenced this pull request May 18, 2026

Docs preview for PR #4510.

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InboraStudio requested a review from schweitzpgi May 19, 2026 11:01

InboraStudio force-pushed the main branch from 5d07ad7 to 17afa55 Compare May 19, 2026 11:02

bettinaheim changed the title ~~fix: resolve critical security, threading, and performance issues across NVQIR and REST helpers~~ fix threading, and performance issues across NVQIR and REST helpers May 19, 2026

InboraStudio requested review from 1tnguyen, bettinaheim and bmhowe23 as code owners May 22, 2026 07:05

InboraStudio force-pushed the main branch from 6051a0f to b2c3153 Compare May 22, 2026 07:24

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InboraStudio commented May 13, 2026 •

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