Improve VM crash dumping#1637
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slipher merged 4 commits intoDaemonEngine:masterfrom Apr 13, 2025
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It turns out that using SetUnhandledExceptionFilter clobbers the standard library's mechanism for calling std::terminate on unhandled exceptions.
Now we can both produce a crash dump, and report the exception message with SendMsg<ErrorMsg> (which sets the text in the UI error message). 6ebd858 was supposed to do that, but I messed up the final version of the commit and called SendMsg<ErrorMsg> too early, so the crash dump was not produced.
So server owners who want to get Unix core dumps for native exe gamelogic could set sgame.nativeExeCrashHandler to 0. Doing this stops the crash handler from being installed. In case of a fatal C++ exception we still install the terminate handler so we can log the exception message, but afterward, if the cvar is off, we call abort() instead of shutting down with the ErrorMsg IPC.
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I guess I will merge this in honor of merging without review day. |
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Yes, we better merge that. |
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sgame.nativeExeCrashHandler(likewise for cgame) which can be used to disable the crash handler in order to produce traditional core dumps for native exe gamelogic.Note: to test NaCl crash handling on amd64 Linux, you need the fixed
nacl_loaderfrom #1504 (comment).