We can't know the exact values of those sleeps in advance, they can be
different for different bugs. Making them random increases the chance that
the C repro executes with the right timings at some point.
Sometimes C reproducers don't work after the generic prog options were
simplified. This change makes syzkaller to try extracting a C repro before
simplifying prog options and after each simplification step. This gives
us more chance to generate a C reproducer.
If the script is aborted at an unfortunate point, it leaves the whole system broken.
E.g. we've seen that fdisk cannot update partition table until the next reboot.
If you really need to kill it, use a different signal. But better wait.
We can start reproducing one crash, but end up reproducing another.
Currently we still attribute the resulting repro to the original crash.
This is wrong.
Save the resulting desc/report for reproducers and use that in manager.
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.
If panic_on_warn set, then we frequently have 2 stacks:
one for the actual report (or maybe even more than one),
and then one for panic caused by panic_on_warn. This makes
reports unnecessary long and the panic (current) stack
is always present in the actual report. So we strip the
panic message. However, we check that we have enough lines
before the panic, because sometimes we have, for example,
a single WARNING line without a stack and then the panic
with the stack.
ParsePatch is used by appengine app.
Appengine apps can't depend on syscall/unsafe,
but pkg/kernel currently does.
Move patch parsing to pkg/email which does not
depend on syscall/unsafe.
We usually store reports as []byte, not as string. They can be large.
So change arg type to []byte.
Also rename it from log to report. In our terminology log is
not symblized/processed crash output. What this function wants
is called report in manager.
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.
