Generate GUIDs for users who wish to upload crash reports. Include it in cra...

chrome/browser/renderer_host/render_crash_handler_host_linux.cc

 // 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.
 
 #include "chrome/browser/renderer_host/render_crash_handler_host_linux.h"
 
 #define __STDC_FORMAT_MACROS
 #include <stdint.h>
 #include <inttypes.h>
 
@@ skipping 64 matching lines @@
   // for writing the minidump as well as a file descriptor and a credentials
   // block so that they can't lie about their pid.
 
   // The length of the control message:
   static const unsigned kControlMsgSize =
       CMSG_SPACE(sizeof(int)) + CMSG_SPACE(sizeof(struct ucred));
   // The length of the regular payload:
   static const unsigned kCrashContextSize =
       sizeof(google_breakpad::ExceptionHandler::CrashContext);
   static const unsigned kMaxActiveURLSize = 1024;
+  static const unsigned kGuidSize = 32;  // 128 bits = 32 chars in hex.
 
   struct msghdr msg = {0};
   struct iovec iov;
-  char context[kCrashContextSize + kMaxActiveURLSize];
+  char context[kCrashContextSize + kMaxActiveURLSize + kGuidSize];
   char control[kControlMsgSize];
   iov.iov_base = context;
   iov.iov_len = sizeof(context);
   msg.msg_iov = &iov;
   msg.msg_iovlen = 1;
   msg.msg_control = control;
   msg.msg_controllen = kControlMsgSize;
 
   const ssize_t n = HANDLE_EINTR(recvmsg(browser_socket_, &msg, 0));
   if (n < 1) {
@@ skipping 10 matching lines @@
       msg.msg_flags & ~MSG_TRUNC) {
     LOG(ERROR) << "Received death signal message with the wrong size;"
                << " n:" << n
                << " msg.msg_controllen:" << msg.msg_controllen
                << " msg.msg_flags:" << msg.msg_flags
                << " kCrashContextSize:" << kCrashContextSize
                << " kControlMsgSize:" << kControlMsgSize;
     return;
   }
 
-  // Anything in the message contents after the crash context is the crashing
-  // URL.
-  const char* const crash_url = &context[kCrashContextSize];
-  const unsigned crash_url_len = n - kCrashContextSize;
+  // After the message contents we have the guid.
+  const char* const guid = &context[kCrashContextSize];
+
+  // Anything in the guid after the crash context is the crashing URL.
+  const char* const crash_url = &context[kCrashContextSize + kGuidSize];
+  const unsigned crash_url_len = n - kCrashContextSize - kGuidSize;
 
   // Walk the control payload an extract the file descriptor and validated pid.
   pid_t crashing_pid = -1;
   int signal_fd = -1;
   for (struct cmsghdr *hdr = CMSG_FIRSTHDR(&msg); hdr;
        hdr = CMSG_NXTHDR(&msg, hdr)) {
     if (hdr->cmsg_level != SOL_SOCKET)
       continue;
     if (hdr->cmsg_type == SCM_RIGHTS) {
       const unsigned len = hdr->cmsg_len -
@@ skipping 39 matching lines @@
   // Send the done signal to the renderer: it can exit now.
   memset(&msg, 0, sizeof(msg));
   iov.iov_base = const_cast<char*>("\x42");
   iov.iov_len = 1;
   msg.msg_iov = &iov;
   msg.msg_iovlen = 1;
 
   HANDLE_EINTR(sendmsg(signal_fd, &msg, MSG_DONTWAIT | MSG_NOSIGNAL));
   HANDLE_EINTR(close(signal_fd));
 
-  UploadCrashDump(minidump_filename.c_str(), crash_url, crash_url_len);
+  UploadCrashDump(minidump_filename.c_str(),
+                  crash_url, crash_url_len,
+                  guid, kGuidSize);
 }
 
 void RenderCrashHandlerHostLinux::WillDestroyCurrentMessageLoop() {
   file_descriptor_watcher_.StopWatchingFileDescriptor();
 }