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[Qemu-devel] [Bug 1748612] Re: qemu-user option -strace -D <file> doesn'
From: |
Peter Maydell |
Subject: |
[Qemu-devel] [Bug 1748612] Re: qemu-user option -strace -D <file> doesn't work |
Date: |
Mon, 12 Feb 2018 10:38:54 -0000 |
If you use -D <file> it will create a file named <file>, which will
contain any logs created via the qemu_log subsystem (which might be
nothing at all, depending on what the guest does). I don't know where
the "-strace" part would come from unless you specified it as part of
the filename.
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https://bugs.launchpad.net/bugs/1748612
Title:
qemu-user option -strace -D <file> doesn't work
Status in QEMU:
New
Bug description:
I have been trying to access qemu -strace output from a script
The main problem was it was on stderr, the strace output was merged with my
program's stderr output.
Then I tried to use the -D option, to log the output to a file.
This didn't work even if the log file was created, but it was empty.
I have looked at the source code and found the print function was not
qemu_log with -strace but gemu_log (to be clear it was GEMU NOT QEMU)
I have then replaced all gemu_log by qemu_log removed declaration of gemu_log
and recompiled, it seems to works just fine right now.
removed declaration here and here:
https://github.com/qemu/qemu/blob/master/linux-user/main.c#L108
https://github.com/qemu/qemu/blob/master/linux-user/qemu.h#L203
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