[Android] Fix handling of intentional crashes during death tests.

testing/android/native_test/native_test_launcher.cc

 // Copyright (c) 2012 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.
 
 // This class sets up the environment for running the native tests inside an
 // android application. It outputs (to a fifo) markers identifying the
 // START/PASSED/CRASH of the test suite, FAILURE/SUCCESS of individual tests,
 // etc.
 // These markers are read by the test runner script to generate test results.
 // It installs signal handlers to detect crashes.
@@ skipping 32 matching lines @@
 // The list of signals which are considered to be crashes.
 const int kExceptionSignals[] = {
   SIGSEGV, SIGABRT, SIGFPE, SIGILL, SIGBUS, -1
 };
 
 struct sigaction g_old_sa[NSIG];
 
 // This function runs in a compromised context. It should not allocate memory.
 void SignalHandler(int sig, siginfo_t* info, void* reserved) {
   // Output the crash marker.
-  write(STDOUT_FILENO, kCrashedMarker, sizeof(kCrashedMarker));
+  write(STDOUT_FILENO, kCrashedMarker, sizeof(kCrashedMarker) - 1);
   g_old_sa[sig].sa_sigaction(sig, info, reserved);
 }
 
 // Writes printf() style string to Android's logger where |priority| is one of
 // the levels defined in <android/log.h>.
 void AndroidLog(int priority, const char* format, ...) {
   va_list args;
   va_start(args, format);
   __android_log_vprint(priority, kLogTag, format, args);
   va_end(args);
@@ skipping 86 matching lines @@
   sa.sa_sigaction = SignalHandler;
   sa.sa_flags = SA_SIGINFO;
 
   for (unsigned int i = 0; kExceptionSignals[i] != -1; ++i) {
     sigaction(kExceptionSignals[i], &sa, &g_old_sa[kExceptionSignals[i]]);
   }
 }
 
 }  // namespace android
 }  // namespace testing