This adds some plumbing for propagating the reason for a renderer's death

chrome/browser/zygote_host_linux.cc

 // 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 "chrome/browser/zygote_host_linux.h"
 
 #include <sys/socket.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <unistd.h>
 
 #include "base/command_line.h"
 #include "base/eintr_wrapper.h"
 #include "base/environment.h"
 #include "base/linux_util.h"
 #include "base/logging.h"
 #include "base/path_service.h"
 #include "base/pickle.h"
 #include "base/process_util.h"
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
 #include "base/scoped_ptr.h"
 #include "base/unix_domain_socket_posix.h"
 #include "base/utf_string_conversions.h"
 
 #include "chrome/browser/renderer_host/render_sandbox_host_linux.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/process_watcher.h"
+#include "chrome/common/result_codes.h"
 
 #include "sandbox/linux/suid/suid_unsafe_environment_variables.h"
 
 static void SaveSUIDUnsafeEnvironmentVariables() {
   // The ELF loader will clear many environment variables so we save them to
   // different names here so that the SUID sandbox can resolve them for the
   // renderer.
 
   for (unsigned i = 0; kSUIDUnsafeEnvironmentVariables[i]; ++i) {
     const char* const envvar = kSUIDUnsafeEnvironmentVariables[i];
@@ skipping 269 matching lines @@
   DCHECK(init_);
   Pickle pickle;
 
   pickle.WriteInt(kCmdReap);
   pickle.WriteInt(process);
 
   if (HANDLE_EINTR(write(control_fd_, pickle.data(), pickle.size())) < 0)
     PLOG(ERROR) << "write";
 }
 
-bool ZygoteHost::DidProcessCrash(base::ProcessHandle handle,
-                                 bool* child_exited) {
+base::TerminationStatus ZygoteHost::GetTerminationStatus(
+    base::ProcessHandle handle,
+    int* exit_code) {
   DCHECK(init_);
   Pickle pickle;
-  pickle.WriteInt(kCmdDidProcessCrash);
+  pickle.WriteInt(kCmdGetTerminationStatus);
   pickle.WriteInt(handle);
 
+  // Set this now to handle the early termination cases.
+  if (exit_code)
+    *exit_code = ResultCodes::NORMAL_EXIT;
+
   static const unsigned kMaxMessageLength = 128;
   char buf[kMaxMessageLength];
   ssize_t len;
   {
     AutoLock lock(control_lock_);
     if (HANDLE_EINTR(write(control_fd_, pickle.data(), pickle.size())) < 0)
       PLOG(ERROR) << "write";
 
     len = ReadReply(buf, sizeof(buf));
   }
 
   if (len == -1) {
     LOG(WARNING) << "Error reading message from zygote: " << errno;
-    return false;
+    return base::TERMINATION_STATUS_NORMAL_TERMINATION;
   } else if (len == 0) {
     LOG(WARNING) << "Socket closed prematurely.";
-    return false;
+    return base::TERMINATION_STATUS_NORMAL_TERMINATION;
   }
 
   Pickle read_pickle(buf, len);
-  bool did_crash, tmp_child_exited;
+  int status, tmp_exit_code;
   void* iter = NULL;
-  if (!read_pickle.ReadBool(&iter, &did_crash) ||
-      !read_pickle.ReadBool(&iter, &tmp_child_exited)) {
-    LOG(WARNING) << "Error parsing DidProcessCrash response from zygote.";
-    return false;
+  if (!read_pickle.ReadInt(&iter, &status) ||
+      !read_pickle.ReadInt(&iter, &tmp_exit_code)) {
+    LOG(WARNING) << "Error parsing GetTerminationStatus response from zygote.";
+    return base::TERMINATION_STATUS_NORMAL_TERMINATION;
   }
 
-  if (child_exited)
-    *child_exited = tmp_child_exited;
+  if (exit_code)
+    *exit_code = tmp_exit_code;
 
-  return did_crash;
+  return static_cast<base::TerminationStatus>(status);
 }