all: speed up tests

Mark tests as parallel where makes sense.
Speed up sys.TransitivelyEnabledCalls.

Execution time is now:

ok  	github.com/google/syzkaller/config		0.172s
ok  	github.com/google/syzkaller/cover		0.060s
ok  	github.com/google/syzkaller/csource		3.081s
ok  	github.com/google/syzkaller/db			0.395s
ok  	github.com/google/syzkaller/executor		0.060s
ok  	github.com/google/syzkaller/fileutil		0.106s
ok  	github.com/google/syzkaller/host		1.530s
ok  	github.com/google/syzkaller/ifuzz		0.491s
ok  	github.com/google/syzkaller/ipc			1.374s
ok  	github.com/google/syzkaller/log			0.014s
ok  	github.com/google/syzkaller/prog		2.604s
ok  	github.com/google/syzkaller/report		0.045s
ok  	github.com/google/syzkaller/symbolizer		0.062s
ok  	github.com/google/syzkaller/sys			0.365s
ok  	github.com/google/syzkaller/syz-dash		0.014s
ok  	github.com/google/syzkaller/syz-hub/state	0.427s
ok  	github.com/google/syzkaller/vm			0.052s

However, main time is still taken by rebuilding sys package.

Fixes #182

2 files changed, 16 insertions, 2 deletions

diff --git a/sys/decl.go b/sys/decl.go
index 270ae4582..0956a94ee 100644
--- a/sys/decl.go
+++ b/sys/decl.go
@@ -521,14 +521,26 @@ func TransitivelyEnabledCalls(enabled map[*Call]bool) map[*Call]bool {
 	for c := range enabled {
 		supported[c] = true
 	}
+	inputResources := make(map[*Call][]*ResourceType)
+	ctors := make(map[string][]*Call)
+	for c := range supported {
+		inputs := c.InputResources()
+		inputResources[c] = inputs
+		for _, res := range inputs {
+			if _, ok := ctors[res.Desc.Name]; ok {
+				continue
+			}
+			ctors[res.Desc.Name] = resourceCtors(res.Desc.Kind, true)
+		}
+	}
 	for {
 		n := len(supported)
 		haveGettime := supported[CallMap["clock_gettime"]]
 		for c := range supported {
 			canCreate := true
-			for _, res := range c.InputResources() {
+			for _, res := range inputResources[c] {
 				noctors := true
-				for _, ctor := range resourceCtors(res.Desc.Kind, true) {
+				for _, ctor := range ctors[res.Desc.Name] {
 					if supported[ctor] {
 						noctors = false
 						break
diff --git a/sys/decl_test.go b/sys/decl_test.go
index c41a95e43..18385c321 100644
--- a/sys/decl_test.go
+++ b/sys/decl_test.go
@@ -8,6 +8,7 @@ import (
 )
 
 func TestTransitivelyEnabledCalls(t *testing.T) {
+	t.Parallel()
 	calls := make(map[*Call]bool)
 	for _, c := range Calls {
 		calls[c] = true
@@ -37,6 +38,7 @@ func TestTransitivelyEnabledCalls(t *testing.T) {
 }
 
 func TestClockGettime(t *testing.T) {
+	t.Parallel()
 	calls := make(map[*Call]bool)
 	for _, c := range Calls {
 		calls[c] = true