[Android] Introduce libheap_profiler for memory profiling.

tools/android/heap_profiler/heap_profiler.gyp

+# Copyright 2014 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.
+
+{
+  'targets': [
+    {
+      # libheap_profiler is the library which will be preloaded in the Zygote /

[pasko, 2014/06/10 16:59:52]

nit:

you could mention LD_PRELOAD here to be more specific about the type of
preloading

Probably makes sense to mention that it's Android Zygote, not the Chrome Zygote
(even though on Android it should be obvious for most readers).

[Primiano Tucci (use gerrit), 2014/06/19 12:27:17]

Done.

+      # target process and contains the black magic to hook malloc/mmap calls.
+      'target_name': 'heap_profiler',
+      'type': 'shared_library',
+      'sources': [
+        'heap_profiler_hooks_android.c',
+      ],
+      'include_dirs': ['../../..'],
+      'dependencies': ['heap_profiler_core'],
+    },
+    {
+      # heap_profiler_core contains only the tracking metadata code without any
+      # hooks. It is required by both the hprof library itself and the unittest.
+      'target_name': 'heap_profiler_core',
+      'type': 'static_library',
+      'sources': [
+        'heap_profiler.c',
+        'heap_profiler.h',
+      ],
+      'include_dirs': ['../../..'],
+    },
+    {
+      'target_name': 'heap_dump',

[pasko, 2014/06/10 16:59:52]

nit:
change mentions of "hdump" in the commit message to "heap_dump"

[Primiano Tucci (use gerrit), 2014/06/19 12:27:17]

Done.

[pasko, 2014/06/20 22:07:17]

really done? I meant the commit message too :)

[Primiano Tucci (use gerrit), 2014/06/23 14:00:32]

OMG, sorry, I renamed everything but the commit message.
Now is really done :)

+      'type': 'executable',
+      'sources': ['heap_dump.c'],
+      'include_dirs': ['../../..'],
+    },
+    {
+      'target_name': 'heap_profiler_unittest',
+      'type': '<(gtest_target_type)',
+      'sources': ['heap_profiler_unittest.cc'],
+      'dependencies': [
+        'heap_profiler_core',
+        '../../../testing/gtest.gyp:gtest',
+      ],
+      'include_dirs': ['../../..'],
+      'conditions': [
+        ['OS == "android"',
+          {
+            'dependencies': [
+              '../../../testing/android/native_test.gyp:native_test_native_code',
+            ],
+          }
+        ],
+      ]
+    },
+  ],
+  'conditions': [
+    ['OS == "android"', {
+      'targets': [
+        {
+          'target_name': 'heap_profiler_unittest_apk',
+          'type': 'none',
+          'dependencies': ['heap_profiler_unittest'],
+          'variables': {
+            'test_suite_name': 'heap_profiler_unittest',
+          },
+          'includes': [ '../../../build/apk_test.gypi' ],
+        },
+      ],
+    }],
+  ],
+}