diff options
Diffstat (limited to 'pkg/sentry/fsimpl/sys/sys.go')
| -rw-r--r-- | pkg/sentry/fsimpl/sys/sys.go | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/pkg/sentry/fsimpl/sys/sys.go b/pkg/sentry/fsimpl/sys/sys.go index 393feb802..1f042d9f7 100644 --- a/pkg/sentry/fsimpl/sys/sys.go +++ b/pkg/sentry/fsimpl/sys/sys.go @@ -21,6 +21,7 @@ import ( "gvisor.dev/gvisor/pkg/abi/linux" "gvisor.dev/gvisor/pkg/context" + "gvisor.dev/gvisor/pkg/coverage" "gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs" "gvisor.dev/gvisor/pkg/sentry/kernel" "gvisor.dev/gvisor/pkg/sentry/kernel/auth" @@ -73,7 +74,7 @@ func (fsType FilesystemType) GetFilesystem(ctx context.Context, vfsObj *vfs.Virt }), "firmware": fs.newDir(creds, defaultSysDirMode, nil), "fs": fs.newDir(creds, defaultSysDirMode, nil), - "kernel": fs.newDir(creds, defaultSysDirMode, nil), + "kernel": kernelDir(ctx, fs, creds), "module": fs.newDir(creds, defaultSysDirMode, nil), "power": fs.newDir(creds, defaultSysDirMode, nil), }) @@ -94,6 +95,21 @@ func cpuDir(ctx context.Context, fs *filesystem, creds *auth.Credentials) *kernf return fs.newDir(creds, defaultSysDirMode, children) } +func kernelDir(ctx context.Context, fs *filesystem, creds *auth.Credentials) *kernfs.Dentry { + // If kcov is available, set up /sys/kernel/debug/kcov. Technically, debugfs + // should be mounted at debug/, but for our purposes, it is sufficient to + // keep it in sys. + var children map[string]*kernfs.Dentry + if coverage.KcovAvailable() { + children = map[string]*kernfs.Dentry{ + "debug": fs.newDir(creds, linux.FileMode(0700), map[string]*kernfs.Dentry{ + "kcov": fs.newKcovFile(ctx, creds), + }), + } + } + return fs.newDir(creds, defaultSysDirMode, children) +} + // Release implements vfs.FilesystemImpl.Release. func (fs *filesystem) Release(ctx context.Context) { fs.Filesystem.VFSFilesystem().VirtualFilesystem().PutAnonBlockDevMinor(fs.devMinor) |