uefi: Drop the panic-on-logger-errors feature #1143
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This was originally added because of occasional panics when logging quickly on VirtualBox. (Unclear whether this bug is still present, and also as far as I know we haven't observed this behavior on any other UEFI implementations.) The decision was made to panic by default on logger errors, but offer an escape mechanism. However, making this a compile-time choice is not ideal, since most UEFI programs are intended to run on arbitrary UEFI implementations. We could make it a runtime option instead, but since loggers are usually just informational (i.e. not critical functionality for the application), silently ignoring errors seems like a better choice for most uses. In the rare case where an application does consider logging critical, they can turn off the `logger` helper and implement their own logger. For prior discussion, see: * rust-osdev#121 * rust-osdev#123
phip1611
reviewed
Apr 21, 2024
| // Ignore all errors. Since we're in the logger implementation we | ||
| // can't log the error. We also don't want to panic, since logging | ||
| // is generally not critical functionality. | ||
| let _ = DecoratedLog::write( |
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nit: We could write it to the serial device and the debugcon device in that case.
phip1611
approved these changes
Apr 21, 2024
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This was originally added because of occasional panics when logging quickly on VirtualBox. (Unclear whether this bug is still present, and also as far as I know we haven't observed this behavior on any other UEFI implementations.) The decision was made to panic by default on logger errors, but offer an escape mechanism. However, making this a compile-time choice is not ideal, since most UEFI programs are intended to run on arbitrary UEFI implementations.
We could make it a runtime option instead, but since loggers are usually just informational (i.e. not critical functionality for the application), silently ignoring errors seems like a better choice for most uses.
In the rare case where an application does consider logging critical, they can turn off the
loggerhelper and implement their own logger.For prior discussion, see:
Checklist