Provide android specific implementation for MultiProcessTest::SpawnCh…

…ildImpl

When tests are run in an APK, we do not have an executable to exec.
We resort to forking and executing the test method directly.

BUG=125059
TEST=


Review URL: https://chromiumcodereview.appspot.com/10408081

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@139342 0039d316-1c4b-4281-b951-d872f2087c98

base/base.gyp

@@ -440,6 +440,7 @@
         'test/mock_time_provider.h',
         'test/multiprocess_test.cc',
         'test/multiprocess_test.h',
+        'test/multiprocess_test_android.cc',
         'test/perf_test_suite.cc',
         'test/perf_test_suite.h',
         'test/scoped_locale.cc',

base/test/multiprocess_test.cc

@@ -36,6 +36,7 @@ CommandLine MultiProcessTest::MakeCmdLine(const std::string& procname,
   return cl;
 }
 
+#if !defined(OS_ANDROID)
 ProcessHandle MultiProcessTest::SpawnChildImpl(
     const std::string& procname,
     const FileHandleMappingVector& fds_to_map,
@@ -50,5 +51,6 @@ ProcessHandle MultiProcessTest::SpawnChildImpl(
   base::LaunchProcess(MakeCmdLine(procname, debug_on_start), options, &handle);
   return handle;
 }
+#endif  // !defined(OS_ANDROID)
 
 }  // namespace base

base/test/multiprocess_test_android.cc

@@ -0,0 +1,38 @@
+// 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.
+
+#include "base/test/multiprocess_test.h"
+
+#include <unistd.h>
+
+#include "base/logging.h"
+#include "base/process.h"
+#include "testing/multiprocess_func_list.h"
+
+namespace base {
+
+// A very basic implementation for android. On Android tests can run in an APK
+// and we don't have an executable to exec*. This implementation does the bare
+// minimum to execute the method specified by procname (in the child process).
+//  - File descriptors are not closed and hence |fds_to_map| is ignored.
+//  - |debug_on_start| is ignored.
+ProcessHandle MultiProcessTest::SpawnChildImpl(
+    const std::string& procname,
+    const FileHandleMappingVector& fds_to_map,
+    bool debug_on_start) {
+  pid_t pid = fork();
+
+  if (pid < 0) {
+    DPLOG(ERROR) << "fork";
+    return kNullProcessHandle;
+  } else if (pid == 0) {
+    // Child process.
+    _exit(multi_process_function_list::InvokeChildProcessTest(procname));
+  }
+
+  // Parent process.
+  return pid;
+}
+
+}  // namespace base