1 files changed, 348 insertions, 0 deletions
diff --git a/ipc/chromium/src/base/process_util_posix.cc b/ipc/chromium/src/base/process_util_posix.cc
new file mode 100644
index 000000000..ade3ebe5e
--- /dev/null
+++ b/ipc/chromium/src/base/process_util_posix.cc
@@ -0,0 +1,348 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 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 <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <sys/resource.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#include <limits>
+#include <set>
+
+#include "base/basictypes.h"
+#include "base/eintr_wrapper.h"
+#include "base/logging.h"
+#include "base/platform_thread.h"
+#include "base/process_util.h"
+#include "base/sys_info.h"
+#include "base/time.h"
+#include "base/waitable_event.h"
+#include "base/dir_reader_posix.h"
+
+#include "mozilla/UniquePtr.h"
+
+const int kMicrosecondsPerSecond = 1000000;
+
+namespace base {
+
+ProcessId GetCurrentProcId() {
+  return getpid();
+}
+
+ProcessHandle GetCurrentProcessHandle() {
+  return GetCurrentProcId();
+}
+
+bool OpenProcessHandle(ProcessId pid, ProcessHandle* handle) {
+  // On Posix platforms, process handles are the same as PIDs, so we
+  // don't need to do anything.
+  *handle = pid;
+  return true;
+}
+
+bool OpenPrivilegedProcessHandle(ProcessId pid, ProcessHandle* handle) {
+  // On POSIX permissions are checked for each operation on process,
+  // not when opening a "handle".
+  return OpenProcessHandle(pid, handle);
+}
+
+void CloseProcessHandle(ProcessHandle process) {
+  // See OpenProcessHandle, nothing to do.
+  return;
+}
+
+ProcessId GetProcId(ProcessHandle process) {
+  return process;
+}
+
+// Attempts to kill the process identified by the given process
+// entry structure.  Ignores specified exit_code; posix can't force that.
+// Returns true if this is successful, false otherwise.
+bool KillProcess(ProcessHandle process_id, int exit_code, bool wait) {
+  bool result = kill(process_id, SIGTERM) == 0;
+
+  if (result && wait) {
+    int tries = 60;
+    bool exited = false;
+    // The process may not end immediately due to pending I/O
+    while (tries-- > 0) {
+      int pid = HANDLE_EINTR(waitpid(process_id, NULL, WNOHANG));
+      if (pid == process_id) {
+        exited = true;
+        break;
+      }
+
+      sleep(1);
+    }
+
+    if (!exited) {
+      result = kill(process_id, SIGKILL) == 0;
+    }
+  }
+
+  if (!result)
+    DLOG(ERROR) << "Unable to terminate process.";
+
+  return result;
+}
+
+#ifdef ANDROID
+typedef unsigned long int rlim_t;
+#endif
+
+// A class to handle auto-closing of DIR*'s.
+class ScopedDIRClose {
+ public:
+  inline void operator()(DIR* x) const {
+    if (x) {
+      closedir(x);
+    }
+  }
+};
+typedef mozilla::UniquePtr<DIR, ScopedDIRClose> ScopedDIR;
+
+
+void CloseSuperfluousFds(const base::InjectiveMultimap& saved_mapping) {
+  // DANGER: no calls to malloc are allowed from now on:
+  // http://crbug.com/36678
+#if defined(ANDROID)
+  static const rlim_t kSystemDefaultMaxFds = 1024;
+  static const char kFDDir[] = "/proc/self/fd";
+#elif defined(OS_LINUX)
+  static const rlim_t kSystemDefaultMaxFds = 8192;
+  static const char kFDDir[] = "/proc/self/fd";
+#elif defined(OS_MACOSX)
+  static const rlim_t kSystemDefaultMaxFds = 256;
+  static const char kFDDir[] = "/dev/fd";
+#elif defined(OS_BSD)
+  // the getrlimit below should never fail, so whatever ..
+  static const rlim_t kSystemDefaultMaxFds = 1024;
+  // at least /dev/fd will exist
+  static const char kFDDir[] = "/dev/fd";
+#endif
+
+  // Get the maximum number of FDs possible.
+  struct rlimit nofile;
+  rlim_t max_fds;
+  if (getrlimit(RLIMIT_NOFILE, &nofile)) {
+    // getrlimit failed. Take a best guess.
+    max_fds = kSystemDefaultMaxFds;
+    DLOG(ERROR) << "getrlimit(RLIMIT_NOFILE) failed: " << errno;
+  } else {
+    max_fds = nofile.rlim_cur;
+  }
+
+  if (max_fds > INT_MAX)
+    max_fds = INT_MAX;
+
+  DirReaderPosix fd_dir(kFDDir);
+
+  if (!fd_dir.IsValid()) {
+    // Fallback case: Try every possible fd.
+    for (rlim_t i = 0; i < max_fds; ++i) {
+      const int fd = static_cast<int>(i);
+      if (fd == STDIN_FILENO || fd == STDOUT_FILENO || fd == STDERR_FILENO)
+        continue;
+      InjectiveMultimap::const_iterator j;
+      for (j = saved_mapping.begin(); j != saved_mapping.end(); j++) {
+        if (fd == j->dest)
+          break;
+      }
+      if (j != saved_mapping.end())
+        continue;
+
+      // Since we're just trying to close anything we can find,
+      // ignore any error return values of close().
+      HANDLE_EINTR(close(fd));
+    }
+    return;
+  }
+
+  const int dir_fd = fd_dir.fd();
+
+  for ( ; fd_dir.Next(); ) {
+    // Skip . and .. entries.
+    if (fd_dir.name()[0] == '.')
+      continue;
+
+    char *endptr;
+    errno = 0;
+    const long int fd = strtol(fd_dir.name(), &endptr, 10);
+    if (fd_dir.name()[0] == 0 || *endptr || fd < 0 || errno)
+      continue;
+    if (fd == STDIN_FILENO || fd == STDOUT_FILENO || fd == STDERR_FILENO)
+      continue;
+    InjectiveMultimap::const_iterator i;
+    for (i = saved_mapping.begin(); i != saved_mapping.end(); i++) {
+      if (fd == i->dest)
+        break;
+    }
+    if (i != saved_mapping.end())
+      continue;
+    if (fd == dir_fd)
+      continue;
+
+    // When running under Valgrind, Valgrind opens several FDs for its
+    // own use and will complain if we try to close them.  All of
+    // these FDs are >= |max_fds|, so we can check against that here
+    // before closing.  See https://bugs.kde.org/show_bug.cgi?id=191758
+    if (fd < static_cast<int>(max_fds)) {
+      int ret = HANDLE_EINTR(close(fd));
+      if (ret != 0) {
+        DLOG(ERROR) << "Problem closing fd";
+      }
+    }
+  }
+}
+
+// Sets all file descriptors to close on exec except for stdin, stdout
+// and stderr.
+// TODO(agl): Remove this function. It's fundamentally broken for multithreaded
+// apps.
+void SetAllFDsToCloseOnExec() {
+#if defined(OS_LINUX)
+  const char fd_dir[] = "/proc/self/fd";
+#elif defined(OS_MACOSX) || defined(OS_BSD)
+  const char fd_dir[] = "/dev/fd";
+#endif
+  ScopedDIR dir_closer(opendir(fd_dir));
+  DIR *dir = dir_closer.get();
+  if (NULL == dir) {
+    DLOG(ERROR) << "Unable to open " << fd_dir;
+    return;
+  }
+
+  struct dirent *ent;
+  while ((ent = readdir(dir))) {
+    // Skip . and .. entries.
+    if (ent->d_name[0] == '.')
+      continue;
+    int i = atoi(ent->d_name);
+    // We don't close stdin, stdout or stderr.
+    if (i <= STDERR_FILENO)
+      continue;
+
+    int flags = fcntl(i, F_GETFD);
+    if ((flags == -1) || (fcntl(i, F_SETFD, flags | FD_CLOEXEC) == -1)) {
+      DLOG(ERROR) << "fcntl failure.";
+    }
+  }
+}
+
+ProcessMetrics::ProcessMetrics(ProcessHandle process) : process_(process),
+                                                        last_time_(0),
+                                                        last_system_time_(0) {
+  processor_count_ = base::SysInfo::NumberOfProcessors();
+}
+
+// static
+ProcessMetrics* ProcessMetrics::CreateProcessMetrics(ProcessHandle process) {
+  return new ProcessMetrics(process);
+}
+
+ProcessMetrics::~ProcessMetrics() { }
+
+bool DidProcessCrash(bool* child_exited, ProcessHandle handle) {
+  int status;
+  const int result = HANDLE_EINTR(waitpid(handle, &status, WNOHANG));
+  if (result == -1) {
+    // This shouldn't happen, but sometimes it does.  The error is
+    // probably ECHILD and the reason is probably that a pid was
+    // waited on again after a previous wait reclaimed its zombie.
+    // (It could also occur if the process isn't a direct child, but
+    // don't do that.)  This is bad, because it risks interfering with
+    // an unrelated child process if the pid is reused.
+    //
+    // So, lacking reliable information, we indicate that the process
+    // is dead, in the hope that the caller will give up and stop
+    // calling us.  See also bug 943174 and bug 933680.
+    CHROMIUM_LOG(ERROR) << "waitpid failed pid:" << handle << " errno:" << errno;
+    if (child_exited)
+      *child_exited = true;
+    return false;
+  } else if (result == 0) {
+    // the child hasn't exited yet.
+    if (child_exited)
+      *child_exited = false;
+    return false;
+  }
+
+  if (child_exited)
+    *child_exited = true;
+
+  if (WIFSIGNALED(status)) {
+    switch(WTERMSIG(status)) {
+      case SIGSYS:
+      case SIGSEGV:
+      case SIGILL:
+      case SIGABRT:
+      case SIGFPE:
+        return true;
+      default:
+        return false;
+    }
+  }
+
+  if (WIFEXITED(status))
+    return WEXITSTATUS(status) != 0;
+
+  return false;
+}
+
+namespace {
+
+int64_t TimeValToMicroseconds(const struct timeval& tv) {
+  return tv.tv_sec * kMicrosecondsPerSecond + tv.tv_usec;
+}
+
+}
+
+int ProcessMetrics::GetCPUUsage() {
+  struct timeval now;
+  struct rusage usage;
+
+  int retval = gettimeofday(&now, NULL);
+  if (retval)
+    return 0;
+  retval = getrusage(RUSAGE_SELF, &usage);
+  if (retval)
+    return 0;
+
+  int64_t system_time = (TimeValToMicroseconds(usage.ru_stime) +
+                       TimeValToMicroseconds(usage.ru_utime)) /
+                        processor_count_;
+  int64_t time = TimeValToMicroseconds(now);
+
+  if ((last_system_time_ == 0) || (last_time_ == 0)) {
+    // First call, just set the last values.
+    last_system_time_ = system_time;
+    last_time_ = time;
+    return 0;
+  }
+
+  int64_t system_time_delta = system_time - last_system_time_;
+  int64_t time_delta = time - last_time_;
+  DCHECK(time_delta != 0);
+  if (time_delta == 0)
+    return 0;
+
+  // We add time_delta / 2 so the result is rounded.
+  int cpu = static_cast<int>((system_time_delta * 100 + time_delta / 2) /
+                             time_delta);
+
+  last_system_time_ = system_time;
+  last_time_ = time;
+
+  return cpu;
+}
+
+}  // namespace base