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Feature checking procedure is split into 2 phases:
1. syz-fuzzer invokes "syz-executor setup feature" for each feature one-by-one,
and checks if executor does not fail.
Executor can also return a special "this feature does not need custom setup",
this allows to not call setup of these features in each new VM.
2. pkg/vminfo runs a simple program with ipc.ExecOpts specific for a concrete feature,
e.g. for wifi injection it will try to run a program with wifi feature enabled,
if setup of the feature fails, executor should also exit with an error.
For coverage features we also additionally check that we actually got coverage.
Then pkg/vminfo combines results of these 2 checks into final result.
syz-execprog now also uses vminfo package and mimics the same checking procedure.
Update #1541
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go:embed is a more modern way to do this and it does
not require a special Makefile step.
Since go:embed cannot use paths that contains "..",
the actual embeding is moved to executor package.
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Akaros support is unused, it was shutdown on syzbot for a while,
the akaros development seems to be frozen for years as well.
We have a bunch of hacks for Akaros since it supported
only super old gcc and haven't supported Go. Remove it.
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At the moment only AMD64 is supported, change file names to emphasise
this.
Signed-off-by: Alexey Kardashevskiy <aik@linux.ibm.com>
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File types that we don't format automatically can end up
with such basic untidiness as trailing whitespaces.
Check for these. Remove all existing precedents.
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The sys/OS/test/* tests are currently mostly undocumented.
Add initial documentation for these tests.
The "External Dependencies" section is just moved with no changes.
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Add a brief description about pseudo-syscalls and how to create new
ones.
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