Respect Linux user prefs with regards to crash reporting.

chrome/renderer/render_crash_handler_linux.cc

-// 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 <string>
-
-#include <unistd.h>
-#include <sys/socket.h>
-#include <sys/uio.h>
-
-#include "base/eintr_wrapper.h"
-#include "breakpad/linux/exception_handler.h"
-#include "breakpad/linux/linux_libc_support.h"
-#include "breakpad/linux/linux_syscall_support.h"
-
-// This is defined in chrome/renderer/renderer_logging_linux.cc, it's the
-// static string containing the current active URL. We send this in the crash
-// report.
-namespace renderer_logging {
-extern std::string active_url;
-}
-
-static bool
-CrashHandler(const void* crash_context, size_t crash_context_size,
-             void* context) {
-  const int fd = (int) context;
-  int fds[2];
-  pipe(fds);
-
-  // The length of the control message:
-  static const unsigned kControlMsgSize =
-      CMSG_SPACE(sizeof(int)) + CMSG_SPACE(sizeof(struct ucred));
-
-  union {
-    struct kernel_msghdr msg;
-    struct msghdr sys_msg;
-  };
-  my_memset(&msg, 0, sizeof(struct kernel_msghdr));
-  struct kernel_iovec iov[2];
-  iov[0].iov_base = const_cast<void*>(crash_context);
-  iov[0].iov_len = crash_context_size;
-  iov[1].iov_base = const_cast<char*>(renderer_logging::active_url.data());
-  iov[1].iov_len = renderer_logging::active_url.size();
-
-  msg.msg_iov = iov;
-  msg.msg_iovlen = 2;
-  char cmsg[kControlMsgSize];
-  memset(cmsg, 0, kControlMsgSize);
-  msg.msg_control = cmsg;
-  msg.msg_controllen = sizeof(cmsg);
-
-  struct cmsghdr *hdr = CMSG_FIRSTHDR(&msg);
-  hdr->cmsg_level = SOL_SOCKET;
-  hdr->cmsg_type = SCM_RIGHTS;
-  hdr->cmsg_len = CMSG_LEN(sizeof(int));
-  *((int*) CMSG_DATA(hdr)) = fds[1];
-  hdr = CMSG_NXTHDR(&sys_msg, hdr);
-  hdr->cmsg_level = SOL_SOCKET;
-  hdr->cmsg_type = SCM_CREDENTIALS;
-  hdr->cmsg_len = CMSG_LEN(sizeof(struct ucred));
-  struct ucred *cred = reinterpret_cast<struct ucred*>(CMSG_DATA(hdr));
-  cred->uid = getuid();
-  cred->gid = getgid();
-  cred->pid = getpid();
-
-  HANDLE_EINTR(sys_sendmsg(fd, &msg, 0));
-  sys_close(fds[1]);
-
-  char b;
-  HANDLE_EINTR(sys_read(fds[0], &b, 1));
-
-  return true;
-}
-
-void EnableRendererCrashDumping() {
-  // When the browser forks off our process, it installs the crash signal file
-  // descriptor in this slot:
-  static const int kMagicCrashSignalFd = 4;
-
-  // We deliberately leak this object.
-  google_breakpad::ExceptionHandler* handler = 
-      new google_breakpad::ExceptionHandler("" /* unused */, NULL, NULL,
-                                            (void*) kMagicCrashSignalFd, true);
-  handler->set_crash_handler(CrashHandler);
-}