1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "content/renderer/renderer_main_platform_delegate.h"
6
7#include <errno.h>
8#include <sys/stat.h>
9
10#include "base/command_line.h"
11#include "base/files/file_util.h"
12#include "base/logging.h"
13#include "content/common/sandbox_linux/sandbox_linux.h"
14#include "content/public/common/content_switches.h"
15#include "content/public/common/sandbox_init.h"
16
17#ifdef ENABLE_VTUNE_JIT_INTERFACE
18#include "v8/src/third_party/vtune/v8-vtune.h"
19#endif
20
21namespace content {
22
23RendererMainPlatformDelegate::RendererMainPlatformDelegate(
24    const MainFunctionParams& parameters)
25    : parameters_(parameters) {
26}
27
28RendererMainPlatformDelegate::~RendererMainPlatformDelegate() {
29}
30
31void RendererMainPlatformDelegate::PlatformInitialize() {
32#ifdef ENABLE_VTUNE_JIT_INTERFACE
33  const CommandLine& command_line = parameters_.command_line;
34  if (command_line.HasSwitch(switches::kEnableVtune))
35    vTune::InitializeVtuneForV8();
36#endif
37}
38
39void RendererMainPlatformDelegate::PlatformUninitialize() {
40}
41
42bool RendererMainPlatformDelegate::EnableSandbox() {
43  // The setuid sandbox is started in the zygote process: zygote_main_linux.cc
44  // http://code.google.com/p/chromium/wiki/LinuxSUIDSandbox
45  //
46  // Anything else is started in InitializeSandbox().
47  LinuxSandbox::InitializeSandbox();
48  // about:sandbox uses a value returned from LinuxSandbox::GetStatus() before
49  // any renderer has been started.
50  // Here, we test that the status of SeccompBpf in the renderer is consistent
51  // with what LinuxSandbox::GetStatus() said we would do.
52  class LinuxSandbox* linux_sandbox = LinuxSandbox::GetInstance();
53  if (linux_sandbox->GetStatus() & kSandboxLinuxSeccompBPF) {
54    CHECK(linux_sandbox->seccomp_bpf_started());
55  }
56
57  // Under the setuid sandbox, we should not be able to open any file via the
58  // filesystem.
59  if (linux_sandbox->GetStatus() & kSandboxLinuxSUID) {
60    CHECK(!base::PathExists(base::FilePath("/proc/cpuinfo")));
61  }
62
63#if defined(__x86_64__)
64  // Limit this test to architectures where seccomp BPF is active in renderers.
65  if (linux_sandbox->seccomp_bpf_started()) {
66    errno = 0;
67    // This should normally return EBADF since the first argument is bogus,
68    // but we know that under the seccomp-bpf sandbox, this should return EPERM.
69    CHECK_EQ(fchmod(-1, 07777), -1);
70    CHECK_EQ(errno, EPERM);
71  }
72#endif  // __x86_64__
73
74  return true;
75}
76
77}  // namespace content
78