Pull seccomp-sandbox in via DEPS rather than using an in-tree copy

This means changes to the sandbox won't have to be committed twice, to 
both trees. 

This is a retry of r57921, which was committed with git-svn and failed 
to remove the "seccomp" directory. This caused problems when trying 
to "svn checkout" to the same location, and the change was reverted. 
This time I will use SVN to commit the change. 

BUG=none 
TEST=smoke test of running chromium with --enable-seccomp-sandbox 
Review URL: http://codereview.chromium.org/3225010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@58184 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 0 insertions, 120 deletions

diff --git a/sandbox/linux/seccomp/sigprocmask.cc b/sandbox/linux/seccomp/sigprocmask.cc
deleted file mode 100644
index 9ff2922..0000000
--- a/sandbox/linux/seccomp/sigprocmask.cc
+++ /dev/null
@@ -1,120 +0,0 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "debug.h"
-#include "sandbox_impl.h"
-
-namespace playground {
-
-// If the sandboxed process tries to mask SIGSEGV, there is a good chance
-// the process will eventually get terminated. If this is really ever a
-// problem, we can hide the fact that SIGSEGV is unmasked. But I don't think
-// we really need this. Masking of synchronous signals is rarely necessary.
-
-#if defined(__NR_sigprocmask)
-long Sandbox::sandbox_sigprocmask(int how, const void* set, void* old_set) {
-  long long tm;
-  Debug::syscall(&tm, __NR_sigprocmask, "Executing handler");
-
-  // Access the signal mask by triggering a SEGV and modifying the signal state
-  // prior to calling rt_sigreturn().
-  long res = -ENOSYS;
-  #if defined(__x86_64__)
-  #error x86-64 does not support sigprocmask(); use rt_sigprocmask() instead
-  #elif defined(__i386__)
-  asm volatile(
-    "push  %%ebx\n"
-    "movl  %2, %%ebx\n"
-    "int   $0\n"
-    "pop   %%ebx\n"
-    : "=a"(res)
-    : "0"(__NR_sigprocmask), "ri"((long)how),
-      "c"((long)set), "d"((long)old_set)
-    : "esp", "memory");
-  #else
-  #error Unsupported target platform
-  #endif
-
-  // Update our shadow signal mask, so that we can copy it upon creation of
-  // new threads.
-  if (res == 0 && set != NULL) {
-    SecureMem::Args* args = getSecureMem();
-    switch (how) {
-    case SIG_BLOCK:
-      *(unsigned long long *)&args->signalMask |=  *(unsigned long long *)set;
-      break;
-    case SIG_UNBLOCK:
-      *(unsigned long long *)&args->signalMask &= ~*(unsigned long long *)set;
-      break;
-    case SIG_SETMASK:
-      *(unsigned long long *)&args->signalMask  =  *(unsigned long long *)set;
-      break;
-    default:
-      break;
-    }
-  }
-
-  Debug::elapsed(tm, __NR_sigprocmask);
-
-  return res;
-}
-#endif
-
-#if defined(__NR_rt_sigprocmask)
-long Sandbox::sandbox_rt_sigprocmask(int how, const void* set, void* old_set,
-                                     size_t bytes) {
-  long long tm;
-  Debug::syscall(&tm, __NR_rt_sigprocmask, "Executing handler");
-
-  // Access the signal mask by triggering a SEGV and modifying the signal state
-  // prior to calling rt_sigreturn().
-  long res = -ENOSYS;
-  #if defined(__x86_64__)
-  asm volatile(
-    "movq %5, %%r10\n"
-    "int $0\n"
-    : "=a"(res)
-    : "0"(__NR_rt_sigprocmask), "D"((long)how),
-      "S"((long)set), "d"((long)old_set), "r"((long)bytes)
-    : "r10", "r11", "rcx", "memory");
-  #elif defined(__i386__)
-  asm volatile(
-    "push  %%ebx\n"
-    "movl  %2, %%ebx\n"
-    "int   $0\n"
-    "pop   %%ebx\n"
-    : "=a"(res)
-    : "0"(__NR_rt_sigprocmask), "ri"((long)how),
-      "c"((long)set), "d"((long)old_set), "S"((long)bytes)
-    : "esp", "memory");
-  #else
-  #error Unsupported target platform
-  #endif
-
-  // Update our shadow signal mask, so that we can copy it upon creation of
-  // new threads.
-  if (res == 0 && set != NULL && bytes >= 8) {
-    SecureMem::Args* args = getSecureMem();
-    switch (how) {
-    case SIG_BLOCK:
-      *(unsigned long long *)&args->signalMask |=  *(unsigned long long *)set;
-      break;
-    case SIG_UNBLOCK:
-      *(unsigned long long *)&args->signalMask &= ~*(unsigned long long *)set;
-      break;
-    case SIG_SETMASK:
-      *(unsigned long long *)&args->signalMask  =  *(unsigned long long *)set;
-      break;
-    default:
-      break;
-    }
-  }
-
-  Debug::elapsed(tm, __NR_rt_sigprocmask);
-
-  return res;
-}
-#endif
-
-} // namespace