1 files changed, 283 insertions, 0 deletions
diff --git a/base/process/launch_win.cc b/base/process/launch_win.cc
new file mode 100644
index 0000000..41477f7
--- /dev/null
+++ b/base/process/launch_win.cc
@@ -0,0 +1,283 @@
+// Copyright (c) 2012 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 "base/process/launch.h"
+
+#include <fcntl.h>
+#include <io.h>
+#include <windows.h>
+#include <userenv.h>
+#include <psapi.h>
+
+#include <ios>
+
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "base/command_line.h"
+#include "base/debug/stack_trace.h"
+#include "base/logging.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/message_loop.h"
+#include "base/metrics/histogram.h"
+#include "base/process/kill.h"
+#include "base/sys_info.h"
+#include "base/win/object_watcher.h"
+#include "base/win/scoped_handle.h"
+#include "base/win/scoped_process_information.h"
+#include "base/win/windows_version.h"
+
+// userenv.dll is required for CreateEnvironmentBlock().
+#pragma comment(lib, "userenv.lib")
+
+namespace base {
+
+namespace {
+
+// This exit code is used by the Windows task manager when it kills a
+// process.  It's value is obviously not that unique, and it's
+// surprising to me that the task manager uses this value, but it
+// seems to be common practice on Windows to test for it as an
+// indication that the task manager has killed something if the
+// process goes away.
+const DWORD kProcessKilledExitCode = 1;
+
+}  // namespace
+
+void RouteStdioToConsole() {
+  // Don't change anything if stdout or stderr already point to a
+  // valid stream.
+  //
+  // If we are running under Buildbot or under Cygwin's default
+  // terminal (mintty), stderr and stderr will be pipe handles.  In
+  // that case, we don't want to open CONOUT$, because its output
+  // likely does not go anywhere.
+  //
+  // We don't use GetStdHandle() to check stdout/stderr here because
+  // it can return dangling IDs of handles that were never inherited
+  // by this process.  These IDs could have been reused by the time
+  // this function is called.  The CRT checks the validity of
+  // stdout/stderr on startup (before the handle IDs can be reused).
+  // _fileno(stdout) will return -2 (_NO_CONSOLE_FILENO) if stdout was
+  // invalid.
+  if (_fileno(stdout) >= 0 || _fileno(stderr) >= 0)
+    return;
+
+  if (!AttachConsole(ATTACH_PARENT_PROCESS)) {
+    unsigned int result = GetLastError();
+    // Was probably already attached.
+    if (result == ERROR_ACCESS_DENIED)
+      return;
+    // Don't bother creating a new console for each child process if the
+    // parent process is invalid (eg: crashed).
+    if (result == ERROR_GEN_FAILURE)
+      return;
+    // Make a new console if attaching to parent fails with any other error.
+    // It should be ERROR_INVALID_HANDLE at this point, which means the browser
+    // was likely not started from a console.
+    AllocConsole();
+  }
+
+  // Arbitrary byte count to use when buffering output lines.  More
+  // means potential waste, less means more risk of interleaved
+  // log-lines in output.
+  enum { kOutputBufferSize = 64 * 1024 };
+
+  if (freopen("CONOUT$", "w", stdout)) {
+    setvbuf(stdout, NULL, _IOLBF, kOutputBufferSize);
+    // Overwrite FD 1 for the benefit of any code that uses this FD
+    // directly.  This is safe because the CRT allocates FDs 0, 1 and
+    // 2 at startup even if they don't have valid underlying Windows
+    // handles.  This means we won't be overwriting an FD created by
+    // _open() after startup.
+    _dup2(_fileno(stdout), 1);
+  }
+  if (freopen("CONOUT$", "w", stderr)) {
+    setvbuf(stderr, NULL, _IOLBF, kOutputBufferSize);
+    _dup2(_fileno(stderr), 2);
+  }
+
+  // Fix all cout, wcout, cin, wcin, cerr, wcerr, clog and wclog.
+  std::ios::sync_with_stdio();
+}
+
+bool LaunchProcess(const string16& cmdline,
+                   const LaunchOptions& options,
+                   ProcessHandle* process_handle) {
+  STARTUPINFO startup_info = {};
+  startup_info.cb = sizeof(startup_info);
+  if (options.empty_desktop_name)
+    startup_info.lpDesktop = L"";
+  startup_info.dwFlags = STARTF_USESHOWWINDOW;
+  startup_info.wShowWindow = options.start_hidden ? SW_HIDE : SW_SHOW;
+
+  if (options.stdin_handle || options.stdout_handle || options.stderr_handle) {
+    DCHECK(options.inherit_handles);
+    DCHECK(options.stdin_handle);
+    DCHECK(options.stdout_handle);
+    DCHECK(options.stderr_handle);
+    startup_info.dwFlags |= STARTF_USESTDHANDLES;
+    startup_info.hStdInput = options.stdin_handle;
+    startup_info.hStdOutput = options.stdout_handle;
+    startup_info.hStdError = options.stderr_handle;
+  }
+
+  DWORD flags = 0;
+
+  if (options.job_handle) {
+    flags |= CREATE_SUSPENDED;
+
+    // If this code is run under a debugger, the launched process is
+    // automatically associated with a job object created by the debugger.
+    // The CREATE_BREAKAWAY_FROM_JOB flag is used to prevent this.
+    flags |= CREATE_BREAKAWAY_FROM_JOB;
+  }
+
+  if (options.force_breakaway_from_job_)
+    flags |= CREATE_BREAKAWAY_FROM_JOB;
+
+  base::win::ScopedProcessInformation process_info;
+
+  if (options.as_user) {
+    flags |= CREATE_UNICODE_ENVIRONMENT;
+    void* enviroment_block = NULL;
+
+    if (!CreateEnvironmentBlock(&enviroment_block, options.as_user, FALSE)) {
+      DPLOG(ERROR);
+      return false;
+    }
+
+    BOOL launched =
+        CreateProcessAsUser(options.as_user, NULL,
+                            const_cast<wchar_t*>(cmdline.c_str()),
+                            NULL, NULL, options.inherit_handles, flags,
+                            enviroment_block, NULL, &startup_info,
+                            process_info.Receive());
+    DestroyEnvironmentBlock(enviroment_block);
+    if (!launched) {
+      DPLOG(ERROR);
+      return false;
+    }
+  } else {
+    if (!CreateProcess(NULL,
+                       const_cast<wchar_t*>(cmdline.c_str()), NULL, NULL,
+                       options.inherit_handles, flags, NULL, NULL,
+                       &startup_info, process_info.Receive())) {
+      DPLOG(ERROR);
+      return false;
+    }
+  }
+
+  if (options.job_handle) {
+    if (0 == AssignProcessToJobObject(options.job_handle,
+                                      process_info.process_handle())) {
+      DLOG(ERROR) << "Could not AssignProcessToObject.";
+      KillProcess(process_info.process_handle(), kProcessKilledExitCode, true);
+      return false;
+    }
+
+    ResumeThread(process_info.thread_handle());
+  }
+
+  if (options.wait)
+    WaitForSingleObject(process_info.process_handle(), INFINITE);
+
+  // If the caller wants the process handle, we won't close it.
+  if (process_handle)
+    *process_handle = process_info.TakeProcessHandle();
+
+  return true;
+}
+
+bool LaunchProcess(const CommandLine& cmdline,
+                   const LaunchOptions& options,
+                   ProcessHandle* process_handle) {
+  return LaunchProcess(cmdline.GetCommandLineString(), options, process_handle);
+}
+
+bool SetJobObjectAsKillOnJobClose(HANDLE job_object) {
+  JOBOBJECT_EXTENDED_LIMIT_INFORMATION limit_info = {0};
+  limit_info.BasicLimitInformation.LimitFlags =
+      JOB_OBJECT_LIMIT_KILL_ON_JOB_CLOSE;
+  return 0 != SetInformationJobObject(
+      job_object,
+      JobObjectExtendedLimitInformation,
+      &limit_info,
+      sizeof(limit_info));
+}
+
+bool GetAppOutput(const CommandLine& cl, std::string* output) {
+  HANDLE out_read = NULL;
+  HANDLE out_write = NULL;
+
+  SECURITY_ATTRIBUTES sa_attr;
+  // Set the bInheritHandle flag so pipe handles are inherited.
+  sa_attr.nLength = sizeof(SECURITY_ATTRIBUTES);
+  sa_attr.bInheritHandle = TRUE;
+  sa_attr.lpSecurityDescriptor = NULL;
+
+  // Create the pipe for the child process's STDOUT.
+  if (!CreatePipe(&out_read, &out_write, &sa_attr, 0)) {
+    NOTREACHED() << "Failed to create pipe";
+    return false;
+  }
+
+  // Ensure we don't leak the handles.
+  win::ScopedHandle scoped_out_read(out_read);
+  win::ScopedHandle scoped_out_write(out_write);
+
+  // Ensure the read handle to the pipe for STDOUT is not inherited.
+  if (!SetHandleInformation(out_read, HANDLE_FLAG_INHERIT, 0)) {
+    NOTREACHED() << "Failed to disabled pipe inheritance";
+    return false;
+  }
+
+  FilePath::StringType writable_command_line_string(cl.GetCommandLineString());
+
+  base::win::ScopedProcessInformation proc_info;
+  STARTUPINFO start_info = { 0 };
+
+  start_info.cb = sizeof(STARTUPINFO);
+  start_info.hStdOutput = out_write;
+  // Keep the normal stdin and stderr.
+  start_info.hStdInput = GetStdHandle(STD_INPUT_HANDLE);
+  start_info.hStdError = GetStdHandle(STD_ERROR_HANDLE);
+  start_info.dwFlags |= STARTF_USESTDHANDLES;
+
+  // Create the child process.
+  if (!CreateProcess(NULL,
+                     &writable_command_line_string[0],
+                     NULL, NULL,
+                     TRUE,  // Handles are inherited.
+                     0, NULL, NULL, &start_info, proc_info.Receive())) {
+    NOTREACHED() << "Failed to start process";
+    return false;
+  }
+
+  // Close our writing end of pipe now. Otherwise later read would not be able
+  // to detect end of child's output.
+  scoped_out_write.Close();
+
+  // Read output from the child process's pipe for STDOUT
+  const int kBufferSize = 1024;
+  char buffer[kBufferSize];
+
+  for (;;) {
+    DWORD bytes_read = 0;
+    BOOL success = ReadFile(out_read, buffer, kBufferSize, &bytes_read, NULL);
+    if (!success || bytes_read == 0)
+      break;
+    output->append(buffer, bytes_read);
+  }
+
+  // Let's wait for the process to finish.
+  WaitForSingleObject(proc_info.process_handle(), INFINITE);
+
+  return true;
+}
+
+void RaiseProcessToHighPriority() {
+  SetPriorityClass(GetCurrentProcess(), HIGH_PRIORITY_CLASS);
+}
+
+}  // namespace base