Re: DEBUG() macros in DXE driver: can’t make it work in QEMU

["Kinney, Michael D" <michael.d.kinney@intel.com>]

If you prefer debug messages on a serial port, you can 
add -D DEBUG_ON_SERIAL_PORT

Mike

> -----Original Message-----
> From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of Laszlo Ersek
> Sent: Tuesday, February 14, 2017 10:17 AM
> To: Nikolay Bodunov <nikolay.bodunov@gmail.com>; edk2-devel@ml01.01.org
> Subject: Re: [edk2] DEBUG() macros in DXE driver: can’t make it work in QEMU
> 
> Hi Nikolay,
> 
> On 02/14/17 18:55, Nikolay Bodunov wrote:
> > Hello
> >
> >
> > I compiled DXE Driver, in DEBUG_GCC49 mode, but I can’t print any debug
> > message.
> > DEBUG((-1, “Print test”))  does nothing.  Exactly as
> > DebugPrint(EFI_D_ERROR, “Print Test);
> 
> (1) Please always terminate the debug message with a newline ("\n") once
> you are done with it. (It's okay to format a single message with several
> DEBUG calls of course, and terminate only the last DEBUG with a newline.)
> 
> (2) Please use DEBUG_ERROR as the symbolic constant for the error mask.
> 
> >
> > However, I see “Print Test” string in my *.efi binary.
> > I use QEMU + OMVF (OVMF was also recompliled in DEBUG_GCC49 mode, to be
> > sure). Serial port output is redirected to a file:
> > qemu-system-x86_64 -L . --bios /…/FV/OVMF.fd -hda hdd.img -serial
> > file:./serial_file
> 
> (3) DEBUG output from OVMF is by default not written to the serial port,
> it is written to the QEMU debug port. Please consult OvmfPkg/README for
> specifics, namely under "Capturing OVMF debug messages on qemu".
> 
> Hope this helps,
> Laszlo
> 
> >
> > All I see in output file is EFI shell output messages, include one that my
> > driver was succesfully loaded. But no messages from DEBUG().
> >
> >
> > My conditions:
> >
> > MODULE_TYPE    = DXE_DRIVER
> >
> >
> > Debug Print Library:
> >
> > DebugLib|MdePkg/Library/BaseDebugLibSerialPort/BaseDebugLibSerialPort.inf
> >
> > (BaseDebugLibNull.inf is commented, of course)
> >
> >
> > DebugPrintEnabled() returns TRUE
> >
> >
> > I also tried to set some key options manually in MdeModulePkg.dsc
> > afterwards, but result didn’t change:
> >
> >
> > [Components]
> >
> >
> >   MdeModulePkg/CrScreenshotDxe/CrScreenshotDxe.inf  {
> >
> >
> >     <PcdsFixedAtBuild>
> >
> >
> > gEfiMdePkgTokenSpaceGuid.gEfiMdePkgTokenSpaceGuid.PcdDebugPrintErrorLevel|0x07
> >
> >       gEfiMdePkgTokenSpaceGuid.PcdDebugPropertyMask|0x2F
> >
> >       gEfiMdePkgTokenSpaceGuid.PcdDebugPrintErrorLevel|0x80000042
> >
> >
> >
> >    <LibraryClasses>
> >
> >
> > DebugLib|MdePkg/Library/BaseDebugLibSerialPort/BaseDebugLibSerialPort.inf
> >
> >
> >    <BuildOptions>
> >
> >       GCC:*_*_*_CC_FLAGS             = -UMDEPKG_NDEBUG
> >
> > }
> >
> >
> > Code (I used it as a base): https://github.com/LongSoft/CrScreenshotDxe
> >
> > Where I got wrong and what else could I try to make it work?
> >
> 
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