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This PR improves process lifecycle handling and resilience across several areas:
- **Reclaim stale shared-memory entries instead of exiting** (`zenserver.cpp`): When a zenserver instance fails to attach as a sponsor to an existing process (e.g. because the PID was reused by an unrelated process), the server now clears the stale shared-memory entry and proceeds with normal startup instead of calling `std::exit(1)`.
- **Wait for child process exit in `Kill()` and `Terminate()` on Unix** (`process.cpp`): After sending `SIGTERM` in `Kill()`, the code now waits up to 5s for graceful shutdown (escalating to `SIGKILL` on timeout), matching the Windows behavior. `Terminate()` also waits after `SIGKILL` so the child is properly reaped and doesn't linger as a zombie clogging up the process table.
- **Fix sysctl buffer race in macOS `FindProcess`** (`process.cpp`): The macOS process enumeration now retries the `sysctl` call (up to 3 attempts with 25% buffer padding) to handle the race where the process list changes between the sizing call and the data-fetching call. Also flattens the nesting and fixes the guard/free scoping.
- **Terminate stale processes before integration tests** (`zenserver-test.cpp`, `test.lua`): The integration test runner now accepts a `--kill-stale-processes` flag (passed automatically by `test.lua`) that scans for and terminates any leftover `zenserver`, `zenserver-test`, and `zentest-appstub` processes from previous test runs, logging the executable name and PID of each. This addresses flaky test failures caused by stale processes from prior runs holding ports or other resources.
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- Improvement: Add easy access options for sanitizers with `xmake config` and `xmake test` as options
- `--msan=[y|n]` Enable MemorySanitizer (Linux only, requires all deps instrumented)
- `--asan=[y|n]` Enable AddressSanitizer (disables mimalloc and sentry)
- `--tsan=[y|n]` Enable ThreadSanitizer (Linux/Mac only)
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removal (#841)
- Percent-decode URIs in ASIO HTTP server to match http.sys CookedUrl behavior, ensuring consistent decoded paths across backends
- Add Environment field to CreateProcOptions for passing extra env vars to child processes (Windows: merged into Unicode environment block; Unix: setenv in fork)
- Add GetCompilerName() and include it in build options startup logging
- Suppress Windows CRT error dialogs in test harness for headless/CI runs
- Fix mimalloc package: pass CMAKE_BUILD_TYPE, skip cfuncs test for cross-compile
- Add virtual destructor to SentryAssertImpl to fix debug-mode warning
- Simplify object store path handling now that URIs arrive pre-decoded
- Add URI decoding test coverage for percent-encoded paths and query params
- Simplify httpasio request handling by using strands (guarantees no parallel handlers per connection)
- Removed deprecated regex-based route matching support
- Fix full GC never triggering after cross-toolchain builds: The `gc_state` file stores `system_clock` ticks, but the tick resolution differs between toolchains (nanoseconds on GCC/standard clang, microseconds on UE clang). A nanosecond timestamp misinterpreted as microseconds appears far in the future (~year 58,000), bypassing the staleness check and preventing time-based full GC from ever running. Fixed by also resetting when the stored timestamp is in the future.
- Clamp GC countdown display to configured interval: Prevents nonsensical log output (e.g. "Full GC in 492128002h") caused by the above or any other clock anomaly. The clamp applies to both the scheduler log and the status API.
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