libstore: Start creating LocalDerivationGoal subclasses

LocalDerivationGoal includes a large number of low-level sandboxing
primitives for Darwin and Linux, intermingled with ifdefs.
Start creating platform-specific classes to make it easier to add new
platforms and review platform-specific code.

This change only creates support infrastructure and moves two function,
more functions will be moved in future changes.

Change-Id: I9fc29fa2a7345107d4fc96c46fa90b4eabf6bb89

1 files changed, 14 insertions, 0 deletions

diff --git a/src/libstore/platform/linux.cc b/src/libstore/platform/linux.cc
index a34608894..6b94c01cc 100644
--- a/src/libstore/platform/linux.cc
+++ b/src/libstore/platform/linux.cc
@@ -1,3 +1,4 @@
+#include "cgroup.hh"
 #include "gc-store.hh"
 #include "signals.hh"
 #include "platform/linux.hh"
@@ -114,4 +115,17 @@ void LinuxLocalStore::findPlatformRoots(UncheckedRoots & unchecked)
     readFileRoots("/proc/sys/kernel/fbsplash", unchecked);
     readFileRoots("/proc/sys/kernel/poweroff_cmd", unchecked);
 }
+
+void LinuxLocalDerivationGoal::killSandbox(bool getStats)
+{
+    if (cgroup) {
+        auto stats = destroyCgroup(*cgroup);
+        if (getStats) {
+            buildResult.cpuUser = stats.cpuUser;
+            buildResult.cpuSystem = stats.cpuSystem;
+        }
+    } else {
+        LocalDerivationGoal::killSandbox(getStats);
+    }
+}
 }