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

chrome/browser/zygote_host_linux.h

 // Copyright (c) 2009 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.
 
 #ifndef CHROME_BROWSER_ZYGOTE_HOST_LINUX_H_
 #define CHROME_BROWSER_ZYGOTE_HOST_LINUX_H_
 #pragma once
 
 #include <unistd.h>
 
 #include <string>
 #include <vector>
 
 #include "base/global_descriptors_posix.h"
 #include "base/lock.h"
 #include "base/process.h"
+#include "base/process_util.h"
 
 template<typename Type>
 struct DefaultSingletonTraits;
 
 static const char kZygoteMagic[] = "ZYGOTE_OK";
 
 // http://code.google.com/p/chromium/wiki/LinuxZygote
 
 // The zygote host is the interface, in the browser process, to the zygote
 // process.
 class ZygoteHost {
  public:
   // Returns the singleton instance.
   static ZygoteHost* GetInstance();
 
   void Init(const std::string& sandbox_cmd);
 
   // Tries to start a renderer process.  Returns its pid on success, otherwise
   // base::kNullProcessHandle;
   pid_t ForkRenderer(const std::vector<std::string>& command_line,
                      const base::GlobalDescriptors::Mapping& mapping);
   void EnsureProcessTerminated(pid_t process);
 
-  // Get the termination status (exit code) of the process and return true if
-  // the status indicates the process crashed. |child_exited| is set to true
-  // iff the child process has terminated. (|child_exited| may be NULL.)
-  bool DidProcessCrash(base::ProcessHandle handle, bool* child_exited);
+  // Get the termination status (and, optionally, the exit code) of
+  // the process. |exit_code| is set to the exit code of the child
+  // process. (|exit_code| may be NULL.)
+  base::TerminationStatus GetTerminationStatus(base::ProcessHandle handle,
+                                               int* exit_code);
 
   // These are the command codes used on the wire between the browser and the
   // zygote.
   enum {
-    kCmdFork = 0,             // Fork off a new renderer.
-    kCmdReap = 1,             // Reap a renderer child.
-    kCmdDidProcessCrash = 2,  // Check if child process crashed.
-    kCmdGetSandboxStatus = 3, // Read a bitmask of kSandbox*
+    kCmdFork = 0,                  // Fork off a new renderer.
+    kCmdReap = 1,                  // Reap a renderer child.
+    kCmdGetTerminationStatus = 2,  // Check what happend to a child process.
+    kCmdGetSandboxStatus = 3,      // Read a bitmask of kSandbox*
   };
 
   // These form a bitmask which describes the conditions of the sandbox that
   // the zygote finds itself in.
   enum {
-    kSandboxSUID = 1 << 0,  // SUID sandbox active
-    kSandboxPIDNS = 1 << 1,  // SUID sandbox is using the PID namespace
-    kSandboxNetNS = 1 << 2,  // SUID sandbox is using the network namespace
+    kSandboxSUID = 1 << 0,     // SUID sandbox active
+    kSandboxPIDNS = 1 << 1,    // SUID sandbox is using the PID namespace
+    kSandboxNetNS = 1 << 2,    // SUID sandbox is using the network namespace
     kSandboxSeccomp = 1 << 3,  // seccomp sandbox active.
   };
 
   pid_t pid() const { return pid_; }
 
   // Returns an int which is a bitmask of kSandbox* values. Only valid after
   // the first render has been forked.
   int sandbox_status() const {
     if (have_read_sandbox_status_word_)
       return sandbox_status_;
@@ skipping 17 matching lines @@
   Lock control_lock_;
   pid_t pid_;
   bool init_;
   bool using_suid_sandbox_;
   std::string sandbox_binary_;
   bool have_read_sandbox_status_word_;
   int sandbox_status_;
 };
 
 #endif  // CHROME_BROWSER_ZYGOTE_HOST_LINUX_H_