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manager: run leak checking only on one instance (it is slow)

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This commit is contained in:
Dmitry Vyukov 2015-12-31 13:11:46 +01:00
parent 2e5e7b6f6b
commit 84916f2fc6
1 changed files with 6 additions and 3 deletions
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9
syz-manager/manager.go
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@ -126,13 +126,14 @@ func RunManager(cfg *config.Config, syscalls map[int]bool, suppressions []*regex
go s.Accept(ln)
for i := 0; i < cfg.Count; i++ {
first := i == 0
go func() {
for {
vmCfg, err := config.CreateVMConfig(cfg)
if err != nil {
fatalf("failed to create VM config: %v", err)
}
if !mgr.runInstance(vmCfg) {
if !mgr.runInstance(vmCfg, first) {
time.Sleep(10 * time.Second)
}
}
@ -141,7 +142,7 @@ func RunManager(cfg *config.Config, syscalls map[int]bool, suppressions []*regex
select {}
}
func (mgr *Manager) runInstance(vmCfg *vm.Config) bool {
func (mgr *Manager) runInstance(vmCfg *vm.Config, first bool) bool {
inst, err := vm.Create(mgr.cfg.Type, vmCfg)
if err != nil {
logf(0, "failed to create instance: %v", err)
@ -177,9 +178,11 @@ func (mgr *Manager) runInstance(vmCfg *vm.Config) bool {
if mgr.enabledSyscalls != "" {
calls = "-calls=" + mgr.enabledSyscalls
}
// Leak detection significantly slows down fuzzing, so detect leaks only on the first instance.
leak := first && mgr.cfg.Leak
outputC, errorC, err := inst.Run(time.Hour, fmt.Sprintf("/syz-fuzzer -name %v -executor /syz-executor -manager %v:%v -procs %v -leak=%v %v %v %v",
vmCfg.Name, inst.HostAddr(), mgr.port, mgr.cfg.Procs, mgr.cfg.Leak, cover, dropprivs, calls))
vmCfg.Name, inst.HostAddr(), mgr.port, mgr.cfg.Procs, leak, cover, dropprivs, calls))
if err != nil {
logf(0, "failed to run fuzzer: %v", err)
return false