From cbd0445ec3b0b184db66966d8a47e6b37d13692e Mon Sep 17 00:00:00 2001
From: Dmitry Vyukov <dvyukov@google.com>
Date: Wed, 25 Nov 2020 09:17:50 +0100
Subject: all: make timeouts configurable

Add sys/targets.Timeouts struct that parametrizes timeouts throughout the system.
The struct allows to control syscall/program/no output timeouts for OS/arch/VM/etc.
See comment on the struct for more details.
---
 pkg/mgrconfig/load.go | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

(limited to 'pkg/mgrconfig')

diff --git a/pkg/mgrconfig/load.go b/pkg/mgrconfig/load.go
index a11de44be..9814987a7 100644
--- a/pkg/mgrconfig/load.go
+++ b/pkg/mgrconfig/load.go
@@ -9,6 +9,7 @@ import (
 	"os"
 	"path/filepath"
 	"regexp"
+	"runtime"
 	"strings"
 
 	"github.com/google/syzkaller/pkg/config"
@@ -34,6 +35,7 @@ type Derived struct {
 	ExecutorBin string
 
 	Syscalls []int
+	Timeouts targets.Timeouts
 }
 
 func LoadData(data []byte) (*Config, error) {
@@ -171,9 +173,27 @@ func Complete(cfg *Config) error {
 	if err != nil {
 		return err
 	}
+	cfg.initTimeouts()
 	return nil
 }
 
+func (cfg *Config) initTimeouts() {
+	slowdown := 1
+	switch {
+	case cfg.Type == "qemu" && runtime.GOARCH != cfg.SysTarget.Arch && runtime.GOARCH != cfg.SysTarget.VMArch:
+		// Assuming qemu emulation.
+		// Quick tests of mmap syscall on arm64 show ~9x slowdown.
+		slowdown = 10
+	case cfg.Type == "gvisor" && cfg.Cover && strings.Contains(cfg.Name, "-race"):
+		// Go coverage+race has insane slowdown of ~350x. We can't afford such large value,
+		// but a smaller value should be enough to finish at least some syscalls.
+		// Note: the name check is a hack.
+		slowdown = 10
+	}
+	// Note: we could also consider heavy debug tools (KASAN/KMSAN/KCSAN/KMEMLEAK) if necessary.
+	cfg.Timeouts = cfg.SysTarget.Timeouts(slowdown)
+}
+
 func checkNonEmpty(fields ...string) error {
 	for i := 0; i < len(fields); i += 2 {
 		if fields[i] == "" {
-- 
cgit mrf-deployment