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imtsuki opened this issue Feb 28, 2020 · 0 comments · Fixed by #122
Closed

Random crashes with SimpleTextOutput Protocol on VirtualBox #121

imtsuki opened this issue Feb 28, 2020 · 0 comments · Fixed by #122

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@imtsuki
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imtsuki commented Feb 28, 2020

Lately, I am experiencing random crashes with uefi-rs running on VirtualBox while writing to stdout. The panic message is like the following:

Panic in /Users/tsuki/.cargo/registry/src/mirrors.ustc.edu.cn-61ef6e0cd06fb9b8/uefi-0.4.3/src/logger.rs at (59, 13):
ERROR: called `Result::unwrap()` on an `Err` value: Error

After investigation, it turns out the following code causes this problem:

uefi-rs/src/proto/console/text/output.rs

Lines 164 to 166 in 006c388

self.output_string(text)
.warning_as_error()
.map_err(|_| fmt::Error)

Where the UEFI firmware shipped with VirtualBox will report EFI_DEVICE_ERROR when we're outputting too fast, probably, I'm not sure.

Personally I think this is not a fatal error and since there is no extra error message returned by output_string(), I'll submit a PR that ignores EFI_DEVICE_ERROR here.
imtsuki added a commit to imtsuki/uefi-rs that referenced this issue Feb 28, 2020
@imtsuki
Fixes rust-osdev#121: ignore EFI_DEVICE_ERROR in output_string
44e6264 
Signed-off-by: imtsuki <[email protected]>
@imtsuki imtsuki mentioned this issue Feb 28, 2020
Merged
HadrienG2 pushed a commit that referenced this issue Feb 29, 2020
@imtsuki
Fixes #121: ignore EFI_DEVICE_ERROR in output_string (#122)
055cc9d 
* Fixes #121: ignore EFI_DEVICE_ERROR in output_string

Signed-off-by: imtsuki <[email protected]>

* ignore Result in logger rather than Output protocol

Signed-off-by: imtsuki <[email protected]>

* Add a FIXME comment that we are ignoring logger's `Result`

Signed-off-by: imtsuki <[email protected]>
IsaacWoods pushed a commit to IsaacWoods/uefi-rs that referenced this issue Apr 7, 2020
@imtsuki @IsaacWoods
Fixes rust-osdev#121: ignore EFI_DEVICE_ERROR in output_string (rust-…
df01812 
…osdev#122)

* Fixes rust-osdev#121: ignore EFI_DEVICE_ERROR in output_string

Signed-off-by: imtsuki <[email protected]>

* ignore Result in logger rather than Output protocol

Signed-off-by: imtsuki <[email protected]>

* Add a FIXME comment that we are ignoring logger's `Result`

Signed-off-by: imtsuki <[email protected]>
nicholasbishop added a commit to nicholasbishop/uefi-rs that referenced this issue Apr 20, 2024
@nicholasbishop
uefi: Drop the panic-on-logger-errors feature
bcac03d 
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
@nicholasbishop nicholasbishop mentioned this issue Apr 20, 2024
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Fixes #121: ignore EFI_DEVICE_ERROR in output_string imtsuki/uefi-rs
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