Refactor container_test in preparation for sandbox_test

Common code to setup and run sandbox is moved to testutil. Also, don't
link "boot" and "gofer" commands with test binary. Instead, use runsc
binary from the build. This not only make the test setup simpler, but
also resolves a dependency issue with sandbox_tests not depending on
container package.

PiperOrigin-RevId: 199164478
Change-Id: I27226286ca3f914d4d381358270dd7d70ee8372f

1 files changed, 6 insertions, 2 deletions

diff --git a/runsc/specutils/specutils.go b/runsc/specutils/specutils.go
index 5f455dec4..3161360b4 100644
--- a/runsc/specutils/specutils.go
+++ b/runsc/specutils/specutils.go
@@ -32,6 +32,10 @@ import (
 	"gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth"
 )
 
+// ExePath must point to runsc binary, which is normally the same binary. It's
+// changed in tests that aren't linked in the same binary.
+var ExePath = "/proc/self/exe"
+
 // LogSpec logs the spec in a human-friendly way.
 func LogSpec(spec *specs.Spec) {
 	log.Debugf("Spec: %+v", spec)
@@ -197,9 +201,9 @@ func Is9PMount(m specs.Mount) bool {
 // BinPath returns the real path to self, resolving symbolink links. This is done
 // to make the process name appears as 'runsc', instead of 'exe'.
 func BinPath() (string, error) {
-	binPath, err := filepath.EvalSymlinks("/proc/self/exe")
+	binPath, err := filepath.EvalSymlinks(ExePath)
 	if err != nil {
-		return "", fmt.Errorf(`error resolving "/proc/self/exe" symlink: %v`, err)
+		return "", fmt.Errorf(`error resolving %q symlink: %v`, ExePath, err)
 	}
 	return binPath, nil
 }