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Rename pkg/kernel to pkg/build and prepare for multi-OS support.
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Passing in compiler is important since 4.17
(at the very least it's noted in the config).
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Currently kernel build failures are insanely verbose
(contain full kernel build output) and there is no
way to separate short descriptions from full output.
Make it possible.
Also try to extract failure root cause froom build log.
Use this in pkg/bisect to not pollute log on build failures.
Update #501
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Pass target OS/arch and VM type to kernel.CreateImage.
Use nbd for gce and loop for qemu VM type.
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See the added comment for motivation.
Update #501
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We usually have the config in memory,
so saving it to disk is an unnecessary step.
Accept byte slice directly.
Update #501
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This leads to false errors when we are switching between gcc and clang:
kernel build failed: failed to run /usr/bin/make [make bzImage -j 32 CC=/syzkaller/clang-kmsan/bin/clang]: exit status 2
arch/x86/Makefile:184: *** Compiler lacks asm-goto support.. Stop.
Fixes #568
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Fix typos, non-canonical code, remove dead code, etc.
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When manager is stopped there are sometimes runaway qemu
processes still running. Set PDEATHSIG for all subprocesses.
We never need child processes outliving parents.
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Allow to specify per-kernel command line and sysctl values
to more closely mimic the target kernel.
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Currently we have unix permissions for new files/dirs
hardcoded throughout the code base. Some places use 0644,
some - 0640, some - 0600 and a variety of other constants.
Introduce osutil.MkdirAll/WriteFile that use the default
permissions and use them throughout the code base.
This makes permissions consistent and also allows to easily
change the permissions later if we change our minds.
Also merge pkg/fileutil into pkg/osutil as they become
dependent on each other. The line between them was poorly
defined anyway as both operate on files.
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Move partial config functionality into BuildWithPartConfig.
It is used only for syz-gce which will be removed soon.
Provide a better interface for new continuous build system.
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NumCPU*2 can create excessive number of subprocesses
in the case machine is busy with other things as well.
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- Move does not work across filesystems (i.e. tmpfs->disk)
- set proper permissions for ssh key
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vm/gce differs from other VM types in that it accepts image
in a weird, GCE-specific format (namely, image named disk.raw
is put into .tar.gz file). This makes it impossible to write
generic code that creates images for any VM types.
Make vm/gce accept just image like e.g. vm/qemu
and handle own specifics internally.
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Normally config is applied on top of defconfig+kvmconfig.
This allows to provide full config that is used unmodified.
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Move functionality to build kernel/image
from syz-gce to a separate package.
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