Quoting Yao, Jiewen (2023-09-07 14:26:31)
> I don't think using ASSERT is a good idea here.
>
Some context:
We observed that EDK2 hits an ASSERT (Out of Resources) when booting
with a full variable store. The message provided in this case is not
helpful for non-experts.
I think the goal here is to emit a more user friendly message.
My suggestion is to wrap the newly added DEBUG statement with an if:
if (OptionIndex == -1) {
Status = EfiBootManagerAddLoadOptionVariable (&NewOption, MAX_UINTN);
+ if (Status == EFI_OUT_OF_RESOURCES) {
+ DEBUG ((DEBUG_ERROR, "ERROR: Variable store is full.\n"));
+ }
ASSERT_EFI_ERROR (Status);
}
The ASSERT_EFI_ERROR was already there. It will halt the execution in
case Status contains an error. Aparently the firmware is not able to
continue with a full variable store.
> Why not return ERROR?
>
This is in VOID PlatformRegisterFvBootOption (), returning ERROR is not
possible.
Thanks,
Oliver
>
> > -----Original Message-----
> > From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Zhenyu
> > Zhang
> > Sent: Thursday, September 7, 2023 7:11 PM
> > To: devel@edk2.groups.io
> > Cc: zheny...@redhat.com; ostef...@redhat.com; kra...@redhat.com;
> > marcandre.lur...@redhat.com; stef...@linux.ibm.com;
> > anthony.per...@citrix.com; jul...@xen.org
> > Subject: [edk2-devel] [PATCH v2 1/1] OvmfPkg:Add variable store is full
> > debug
> > info
> >
> > From: "Zhenyu Zhang" <zheny...@redhat.com>
> >
> > When the variable store is full, edk2 will directly assert.
> > Add debug information to help users understand what caused
> > the assertion.
> >
> > Actual results:
> > RecordVarErrorFlag (0xEF) 9A144FE2A47E:937FE521-95AE-4D1A-8929-
> > 48BCD90AD31A - 0x00000003 - 0x7E
> > CommonVariableSpace = 0x3FF9C - CommonVariableTotalSize =
> > 0x3FF98
> > RecordVarErrorFlag (0xEF) 9A144FE2A47E:937FE521-95AE-4D1A-8929-
> > 48BCD90AD31A - 0x00000003 - 0x92
> > CommonVariableSpace = 0x3FF9C - CommonVariableTotalSize = 0x3FF98
> >
> > Synchronous Exception at 0x000000023CA60374
> > ......
> > ASSERT_EFI_ERROR (Status = Out of Resources)
> > ASSERT /builddir/build/BUILD/edk2-ba91d0292e59/OvmfPkg/Library/
> > PlatformBootManagerLib/BdsPlatform.c(142): !(((INTN)(RETURN_
> > STATUS)(Status)) < 0)
> >
> > Cc: Oliver Steffen <ostef...@redhat.com>
> > Cc: Gerd Hoffmann <kra...@redhat.com>
> > Cc: Marc-André Lureau <marcandre.lur...@redhat.com>
> > Cc: Stefan Berger <stef...@linux.ibm.com>
> > Cc: Anthony Perard <anthony.per...@citrix.com>
> > Cc: Julien Grall <jul...@xen.org>
> > Signed-off-by: Zhenyu Zhang <zheny...@redhat.com>
> > ---
> > OvmfPkg/Library/PlatformBootManagerLib/BdsPlatform.c | 1 +
> > 1 file changed, 1 insertion(+)
> >
> > diff --git a/OvmfPkg/Library/PlatformBootManagerLib/BdsPlatform.c
> > b/OvmfPkg/Library/PlatformBootManagerLib/BdsPlatform.c
> > index 8dc2bbf97371..c95c7931a3f5 100644
> > --- a/OvmfPkg/Library/PlatformBootManagerLib/BdsPlatform.c
> > +++ b/OvmfPkg/Library/PlatformBootManagerLib/BdsPlatform.c
> > @@ -139,6 +139,7 @@ PlatformRegisterFvBootOption (
> >
> > if (OptionIndex == -1) {
> > Status = EfiBootManagerAddLoadOptionVariable (&NewOption, MAX_UINTN);
> > + DEBUG ((DEBUG_ERROR, "ERROR: Variable store is full.\n"));
> > ASSERT_EFI_ERROR (Status);
> > }
> >
> > --
> > 2.39.3
> >
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