syz-manager: collect machine information

* syz-manager: finish a prototype

Extract machine info from /proc/cpuinfo and /sys/kvm*/parameters/* and
send it from syz-fuzzer to syz-manager. Append the machine info after
crash reports.

* syz-manager: refactor the code

- Add kvm parameters machine info.
- Store the machine info in the RPCServer instead of the manager.
- Store the machine info in another field instead of appending it after
  the original report
- Save the machine info locally in machineInfo*.

* syz-manager: fix coding-style problems

* syz-fuzzer: improve the output from /proc/cpuinfo

Improve the machine info extracted from /proc/cpuinfo by grouping lines
with the same key.

* syz-manager: fix race condition in runInstance

* syz-fuzzer: add tests for collecting machine info

- Add some tests to test collecting machine information.
- Split readCPUInfo into scanCPUInfo so that we can test it.

* syz-fuzzer: refactor scanCPUInfo

Refactor scanCPUInfo so that no sorting is needed.

* syz-fuzzer: refactor some code

Fix some issue that was pointed out on Github.

1 files changed, 2 insertions, 1 deletions

diff --git a/pkg/rpctype/rpctype.go b/pkg/rpctype/rpctype.go
index fcc01a99a..c370b0a0e 100644
--- a/pkg/rpctype/rpctype.go
+++ b/pkg/rpctype/rpctype.go
@@ -25,7 +25,8 @@ type RPCCandidate struct {
 }
 
 type ConnectArgs struct {
-	Name string
+	Name        string
+	MachineInfo []byte
 }
 
 type ConnectRes struct {