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In case of SetOneReg error, format the register id in hex and add a value we tried to set as a part of the error message.
Also stop constructing PathBuf from constant string.

Reason

Better error messages.

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Stop creating PathBuf from a heap allocated constant string.

Signed-off-by: Egor Lazarchuk <[email protected]>
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codecov bot commented Apr 23, 2025

Codecov Report

Attention: Patch coverage is 75.00000% with 6 lines in your changes missing coverage. Please review.

Project coverage is 83.08%. Comparing base (49c1794) to head (f90b1ac).
Report is 3 commits behind head on main.

Files with missing lines Patch % Lines
src/vmm/src/arch/aarch64/vcpu.rs 64.70% 6 Missing ⚠️
Additional details and impacted files
@@            Coverage Diff             @@
##             main    #5164      +/-   ##
==========================================
+ Coverage   83.04%   83.08%   +0.04%     
==========================================
  Files         250      250              
  Lines       26892    26907      +15     
==========================================
+ Hits        22332    22356      +24     
+ Misses       4560     4551       -9     
Flag Coverage Δ
5.10-c5n.metal 83.59% <ø> (+<0.01%) ⬆️
5.10-m5n.metal 83.58% <ø> (-0.01%) ⬇️
5.10-m6a.metal 82.81% <ø> (+<0.01%) ⬆️
5.10-m6g.metal 79.37% <75.00%> (-0.01%) ⬇️
5.10-m6i.metal 83.57% <ø> (+<0.01%) ⬆️
5.10-m7a.metal-48xl 82.79% <ø> (?)
5.10-m7g.metal 79.37% <75.00%> (-0.01%) ⬇️
5.10-m7i.metal-24xl 83.54% <ø> (?)
5.10-m7i.metal-48xl 83.54% <ø> (?)
5.10-m8g.metal-24xl 79.36% <75.00%> (?)
5.10-m8g.metal-48xl 79.36% <75.00%> (?)
6.1-c5n.metal 83.63% <ø> (+<0.01%) ⬆️
6.1-m5n.metal 83.63% <ø> (ø)
6.1-m6a.metal 82.85% <ø> (ø)
6.1-m6g.metal 79.37% <75.00%> (-0.01%) ⬇️
6.1-m6i.metal 83.62% <ø> (ø)
6.1-m7a.metal-48xl 82.85% <ø> (?)
6.1-m7g.metal 79.37% <75.00%> (-0.01%) ⬇️
6.1-m7i.metal-24xl 83.64% <ø> (?)
6.1-m7i.metal-48xl 83.64% <ø> (?)
6.1-m8g.metal-24xl 79.36% <75.00%> (?)
6.1-m8g.metal-48xl 79.37% <75.00%> (?)

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@ShadowCurse ShadowCurse force-pushed the aarch64_better_reg_set_error branch 2 times, most recently from 0def782 to 768e357 Compare April 23, 2025 11:48
@ShadowCurse ShadowCurse force-pushed the aarch64_better_reg_set_error branch 4 times, most recently from 3beb231 to 88246fb Compare April 23, 2025 14:32
Format register id in hex and print the value was attempted to be set.

Signed-off-by: Egor Lazarchuk <[email protected]>
If test need to drop fd, it needs to do that before assert
checks. Otherwise if assert fails, the IO safety error will
occur instead of the assertion error.

Signed-off-by: Egor Lazarchuk <[email protected]>
@ShadowCurse ShadowCurse force-pushed the aarch64_better_reg_set_error branch from 88246fb to f90b1ac Compare April 23, 2025 14:40
@ShadowCurse ShadowCurse self-assigned this Apr 23, 2025
@ShadowCurse ShadowCurse marked this pull request as ready for review April 23, 2025 14:51
@ShadowCurse ShadowCurse added Status: Awaiting review Indicates that a pull request is ready to be reviewed Type: Enhancement Indicates new feature requests labels Apr 23, 2025
@ShadowCurse ShadowCurse merged commit 6a8347f into firecracker-microvm:main Apr 23, 2025
7 of 9 checks passed
@ShadowCurse ShadowCurse deleted the aarch64_better_reg_set_error branch April 23, 2025 15:16
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