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We have 2 packages with the same name: pkg/config and syz-manager/config.
This leads to constant clashes. We either rename one to pkgconfig or
another to mgrconfig. This is not good and will become worse when/if
we have another program-specific config in a separate package.
Rename manager config to mgrconfig.
Other program-specific configs can use the same convention
in future -- fooconfig.
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VM infrastructure currently has several problems:
- Config struct is complete mess with a superset of params for all VM types
- verification of Config is mess spread across several places
- there is no place where VM code could do global initialization
like creating GCE connection, uploading GCE image to GCS,
matching adb devices with consoles, etc
- it hard to add private VM implementations
such impl would need to add code to config package
which would lead to constant merge conflicts
- interface for VM implementation is mixed with interface for VM users
this does not allow to provide best interface for both of them
- there is no way to add common code for all VM implementations
This change solves these problems by:
- splitting VM interface for users (vm package) and VM interface
for VM implementations (vmimpl pacakge), this in turn allows
to add common code
- adding Pool concept that allows to do global initialization
and config checking at the right time
- decoupling manager config from VM-specific config
each VM type now defines own config
Note: manager configs need to be changed after this change:
VM-specific parts are moved to own "vm" subobject.
Note: this change also drops "local" VM type.
Its story was long unclear and there is now syz-stress which solves the same problem.
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Introduce generic config.Load function that can be
reused across multiple programs (syz-manager, syz-gce, etc).
Move the generic config functionality to pkg/config package.
The idea is to move all helper (non-main) packages to pkg/ dir,
because we have more and more of them and they pollute the top dir.
Move the syz-manager config parts into syz-manager/config package.
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Currently we try to optimize and reuse VMs in some cases.
The major problem is that qemu VM.Run implementation does not
expect more than one Run call. The second one always fails.
Another problem is that VM state is not completely clean
and there can be some accumulated state.
Don't try to be smart and recreate VMs always.
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Check for compiler warnings during compilation.
Don't require -std=c99.
Fix existing compiler warnings.
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Add new config parameter "ignores" which contains list of regexp expressions.
If one of the expressions is matched against oops line,
crash report is not saved and VM is not restarted.
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With this change manager will run reproduction on crashes
until reproducer is discovered, but at most 3 times.
If reproducer is discovered it is saved with crashes and shown on the web UI.
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This is required for crash reproduction in manager.
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Factor out repro logic from syz-repro tool,
so that it can be used in syz-manager.
Also, support sandboxes in code generated by
csoure. This is required to reproduce crashes
that require e.g. namespace sandbox.
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