Implement the NativeStackSampler for the Mac.

base/BUILD.gn

 # Copyright (c) 2013 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.
 
 # HOW TO WRITE CONDITIONALS IN THIS FILE
 # ======================================
 #
 # In many other places, one would write a conditional that expresses all the
 # cases when a source file is used or unused, and then either add or subtract
 # it from the sources list in that case
@@ skipping 675 matching lines @@
     "process/process_metrics_linux.cc",
     "process/process_metrics_mac.cc",
 
     #"process/process_metrics_openbsd.cc",  # Unused in Chromium build.
     "process/process_metrics_posix.cc",
     "process/process_metrics_win.cc",
     "process/process_posix.cc",
     "process/process_win.cc",
     "profiler/native_stack_sampler.cc",
     "profiler/native_stack_sampler.h",
+    "profiler/native_stack_sampler_mac.cc",
     "profiler/native_stack_sampler_posix.cc",
     "profiler/native_stack_sampler_win.cc",
     "profiler/scoped_profile.cc",
     "profiler/scoped_profile.h",
     "profiler/scoped_tracker.cc",
     "profiler/scoped_tracker.h",
     "profiler/stack_sampling_profiler.cc",
     "profiler/stack_sampling_profiler.h",
     "profiler/tracked_time.cc",
     "profiler/tracked_time.h",
@@ skipping 756 matching lines @@
   }
 
   # Mac or iOS.
   if (is_mac || is_ios) {
     sources -= [
       "memory/shared_memory_posix.cc",
       "native_library_posix.cc",
       "strings/sys_string_conversions_posix.cc",
       "threading/platform_thread_internal_posix.cc",
     ]
+
+    if (is_mac) {
+      sources -= [ "profiler/native_stack_sampler_posix.cc" ]
+    }
   } else {
     # Non-Mac/ios.
     sources -= [
       "files/file_path_watcher_fsevents.cc",
       "files/file_path_watcher_fsevents.h",
       "files/file_path_watcher_kqueue.cc",
       "files/file_path_watcher_kqueue.h",
     ]
   }
 
@@ skipping 351 matching lines @@
 
   loadable_module("scoped_handle_test_dll") {
     sources = [
       "win/scoped_handle_test_dll.cc",
     ]
     deps = [
       ":base",
       "//base/win:base_win_features",
     ]
   }
+}
 
+if (is_win || is_mac) {
   if (current_cpu == "x64") {
     # Must be a shared library so that it can be unloaded during testing.
     shared_library("base_profiler_test_support_library") {
       sources = [
         "profiler/test_support_library.cc",
       ]
       deps = [
         "//build/config/sanitizers:deps",
       ]
     }
@@ skipping 443 matching lines @@
 
   if (use_partition_alloc) {
     sources += [ "allocator/partition_allocator/partition_alloc_unittest.cc" ]
   }
 
   if (is_mac) {
     libs = [
       "CoreFoundation.framework",
       "Foundation.framework",
     ]
+    if (current_cpu == "x64") {
+      data_deps += [ ":base_profiler_test_support_library" ]
+    }
   }
 
   if (is_linux) {
     if (is_desktop_linux) {
       sources += [ "nix/xdg_util_unittest.cc" ]
     }
 
     deps += [ "//base/test:malloc_wrapper" ]
 
     if (!is_component_build) {
@@ skipping 18 matching lines @@
       "debug/proc_maps_linux_unittest.cc",
       "trace_event/trace_event_android_unittest.cc",
     ]
     set_sources_assignment_filter(sources_assignment_filter)
   }
 
   if (is_win) {
     deps += [ "//base:scoped_handle_test_dll" ]
     if (current_cpu == "x64") {
       sources += [ "profiler/win32_stack_frame_unwinder_unittest.cc" ]
-      deps += [ ":base_profiler_test_support_library" ]
+      data_deps += [ ":base_profiler_test_support_library" ]
     }
   }
 
   if (use_experimental_allocator_shim) {
     sources += [ "allocator/allocator_shim_unittest.cc" ]
   }
 
   # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
   configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 
@@ skipping 351 matching lines @@
 }
 
 fuzzer_test("base_json_correctness_fuzzer") {
   sources = [
     "json/correctness_fuzzer.cc",
   ]
   deps = [
     ":base",
   ]
 }