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Print a debug message if /sys/kernel/debug/kcov is available 

This will help to debug:
https://syzkaller.appspot.com/bug?id=0d717bd7028dceeb4b38f09aab2841c398b41d81

PiperOrigin-RevId: 341458715
This commit is contained in:
Andrei Vagin 2020-11-09 12:13:13 -08:00 committed by gVisor bot
parent d4e0b829e4
commit cbca5b2edd
1 changed files with 2 additions and 0 deletions
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2
pkg/sentry/fsimpl/sys/sys.go
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@ -23,6 +23,7 @@ import (
"gvisor.dev/gvisor/pkg/abi/linux"
"gvisor.dev/gvisor/pkg/context"
"gvisor.dev/gvisor/pkg/coverage"
"gvisor.dev/gvisor/pkg/log"
"gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs"
"gvisor.dev/gvisor/pkg/sentry/kernel"
"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
@ -126,6 +127,7 @@ func kernelDir(ctx context.Context, fs *filesystem, creds *auth.Credentials) ker
// keep it in sys.
var children map[string]kernfs.Inode
if coverage.KcovAvailable() {
log.Debugf("Set up /sys/kernel/debug/kcov")
children = map[string]kernfs.Inode{
"debug": fs.newDir(ctx, creds, linux.FileMode(0700), map[string]kernfs.Inode{
"kcov": fs.newKcovFile(ctx, creds),