feat(crashhandler): added crash handler for exceptions handling on runtime#551
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… log, and crash dialog - Install/Uninstall signal handlers (Linux/macOS) and SEH filter (Windows) - Capture backtrace on crashing thread in signal handler; overwrite frame 0 with faulting PC from ucontext_t so the log points at the crash site - OnCrash() captures call-site stack before waking the worker thread - Crash log header includes App, Date, OS, Arch, CPU, and signal/exception - Crash dialog: GTK3 (dlopen, no compile-time dep) on Linux with zenity/kdialog fallback; native Cocoa window on macOS (two paths: signal vs OnCrash); native Win32 window on Windows - Windows: minidump written via MiniDumpWriteDump; 32KB stack trace buffer; DuplicateHandle with pseudo-handle fallback - PreCrashCallback with 2-second timeout; pthread_join on completion, pthread_detach on timeout - ZENGINE_VALIDATE_ASSERT wired to OnAssertionFailure in Release/RelWithDebInfo - CrashDialogDemo and CrashHandler_test scoped to Release/RelWithDebInfo builds - Alt-stack uses fixed 32KB constant (SIGSTKSZ non-constexpr on glibc 2.34+)
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jnyfah
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Jul 13, 2026
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This PR addresses the crash-handler design doc : crash-handler design doc
For this implementation, we skipped the upload section since it will require setting up a logging platform