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Daksh Mamodiya
bda67b82e7
The overall `cmakeBuild` snippet is written only after the native build tool returns, so interrupting `cmake --build` with Ctrl+C terminated CMake before it was recorded and lost the build's delineation. When instrumentation is active, install a scoped, async-signal-safe handler (POSIX SIGINT; Windows CTRL_C/CTRL_BREAK) that just flags the interrupt. The existing write then runs during unwind, records the interrupting signal in a new `interruptSignal` field, skips the post-build index hook, and re-raises so the exit status still reflects the signal. The handler lives in its own translation unit, keeping the platform-divergent signal code out of the main instrumentation implementation. Issue: #27859