WIP: Implement seccomp-bpf sandbox for nacl_helper_nonsfi.

components/nacl/loader/nonsfi/nonsfi_sandbox.cc

Index: components/nacl/loader/nonsfi/nonsfi_sandbox.cc
diff --git a/components/nacl/loader/nonsfi/nonsfi_sandbox.cc b/components/nacl/loader/nonsfi/nonsfi_sandbox.cc
index 0340f6ff146c60669a1e4addea6570555b62da25..c4bd17e190003d98d9ace7041b5f6bf7f765ca4e 100644
--- a/components/nacl/loader/nonsfi/nonsfi_sandbox.cc
+++ b/components/nacl/loader/nonsfi/nonsfi_sandbox.cc
@@ -6,11 +6,8 @@
 
 #include <errno.h>
 #include <fcntl.h>
-#include <linux/futex.h>
-#include <linux/net.h>
 #include <sys/mman.h>
 #include <sys/prctl.h>
-#include <sys/ptrace.h>
 #include <sys/socket.h>
 #include <sys/syscall.h>
 #include <sys/time.h>
@@ -23,13 +20,27 @@
 #include "sandbox/linux/bpf_dsl/bpf_dsl.h"
 #include "sandbox/linux/seccomp-bpf-helpers/sigsys_handlers.h"
 #include "sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.h"
+#include "sandbox/linux/system_headers/android_futex.h"
 #include "sandbox/linux/system_headers/linux_syscalls.h"
 
+#if !defined(OS_NACL_NONSFI)
+#include <linux/net.h>  // TODO move SYS_SOCKETPAIR etc to there.
+#include <sys/ptrace.h>
+#endif
+
 #if defined(__arm__) && !defined(MAP_STACK)
 // Chrome OS Daisy (ARM) build environment has old headers.
 #define MAP_STACK 0x20000
 #endif
 
+// TODO
+#if !defined(PR_SET_NAME)
+#define PR_SET_NAME 15
+#endif
+#if !defined(MAP_STACK)
+#define MAP_STACK 0x20000
+#endif
+
 #define CASES SANDBOX_BPF_DSL_CASES
 
 using sandbox::CrashSIGSYS;
@@ -183,12 +194,15 @@ bool IsGracefullyDenied(int sysno) {
 }
 
 void RunSandboxSanityChecks() {
+#if !defined(OS_NACL_NONSFI)
+  // TODO: Is this sanity check needed? Can we have alternative?
   errno = 0;
   // Make a ptrace request with an invalid PID.
   long ptrace_ret = ptrace(PTRACE_PEEKUSER, -1 /* pid */, NULL, NULL);
   CHECK_EQ(-1, ptrace_ret);
   // Without the sandbox on, this ptrace call would ESRCH instead.
   CHECK_EQ(EPERM, errno);
+#endif
 }
 
 }  // namespace