Refactor Android to use chrome_crashpad_handler

Instead of using crashpad's crashpad_handler, refactor Android to use
our own custom chrome_crashpad_handler (also used by macOS) and have it
also pass through the CrashpadHandlerMain entry point so that it picks
up any custom crashpad hooks we want to install.

CQ-DEPEND=CL:1707405

Bug: 973167
Change-Id: Id6d91a35ce12e547b4a7c92d07f869c96afae797
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1708838
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
Reviewed-by: Michael Spang <spang@chromium.org>
Commit-Queue: Vlad Tsyrklevich <vtsyrklevich@chromium.org>
Cr-Commit-Position: refs/heads/master@{#682364}

chrome/android/chrome_public_apk_tmpl.gni

@@ -199,13 +199,13 @@ template("chrome_public_common_apk_or_module_tmpl") {
     if (!_is_monochrome && !_is_trichrome) {
       deps += [
         "//chrome/android:chrome_public_v8_assets",
-        "//third_party/crashpad/crashpad/handler:crashpad_handler_named_as_so",
+        "//components/crash/content/app:chrome_crashpad_handler_named_as_so",
         "//third_party/icu:icu_assets",
       ]
       if (!defined(loadable_modules)) {
         loadable_modules = []
       }
-      loadable_modules += [ "$root_out_dir/libcrashpad_handler.so" ]
+      loadable_modules += [ "$root_out_dir/libchrome_crashpad_handler.so" ]
     }
 
     if (_enable_multidex) {

chrome/android/monochrome/scripts/monochrome_apk_checker.py

@@ -25,7 +25,7 @@ def BuildFileMatchRegex(*file_matchers):
     r'lib/.*/libchrome\.\d{4}\.\d{2,3}\.so', # libchrome placeholders
     r'lib/.*/libchromium_android_linker\.so',
     r'lib/.*/libchromeview\.so', # placeholder library
-    r'lib/.*/libcrashpad_handler\.so',
+    r'lib/.*/libchrome_crashpad_handler\.so',
     r'lib/.*/crazy\.libchrome\.so',
     r'lib/.*/crazy\.libchrome\.align',
     r'lib/.*/gdbserver',

chromecast/BUILD.gn

@@ -663,10 +663,10 @@ if (is_android) {
       "//base:base_java",
       "//chromecast/android:libcast_shell_android",
       "//chromecast/browser/android:cast_shell_java",
-      "//third_party/crashpad/crashpad/handler:crashpad_handler_named_as_so",
+      "//components/crash/content/app:chrome_crashpad_handler_named_as_so",
     ]
 
-    loadable_modules = [ "$root_out_dir/libcrashpad_handler.so" ]
+    loadable_modules = [ "$root_out_dir/libchrome_crashpad_handler.so" ]
 
     command_line_flags_file = "castshell-command-line"
     enable_multidex = true

components/crash/content/app/BUILD.gn

@@ -213,7 +213,7 @@ if (is_win) {
   }
 }
 
-if (is_mac) {
+if (is_mac || is_android) {
   # We build a chromium-specific crashpad_handler executable so that we can
   # define custom UserStreamDataSources.
   executable("chrome_crashpad_handler") {
@@ -222,15 +222,11 @@ if (is_mac) {
     ]
 
     deps = [
-      "//components/gwp_asan/buildflags",
-      "//third_party/crashpad/crashpad/handler:handler",
+      ":crashpad_handler_main",
+      "//third_party/crashpad/crashpad/handler",
     ]
 
-    if (enable_gwp_asan) {
-      deps += [ "//components/gwp_asan/crash_handler" ]
-    }
-
-    if (is_component_build) {
+    if (is_mac && is_component_build) {
       ldflags = [
         # The handler is in
         # Chromium.app/Contents/Versions/X/Chromium Framework.framework/Versions/A/Helpers/
@@ -257,6 +253,26 @@ if (is_mac) {
   }
 }
 
+if (is_android) {
+  # There is not any normal way to package native executables in an Android APK.
+  # It is normal to package native code as a loadable module but Android's APK
+  # installer will ignore files not named like a shared object, so give the
+  # handler executable an acceptable name.
+  copy("chrome_crashpad_handler_named_as_so") {
+    deps = [
+      ":chrome_crashpad_handler",
+    ]
+
+    sources = [
+      "$root_out_dir/chrome_crashpad_handler",
+    ]
+
+    outputs = [
+      "$root_out_dir/libchrome_crashpad_handler.so",
+    ]
+  }
+}
+
 # This source set provides the functionality required for tests, which on Windows
 # link the export thunks directly into the test binary.
 source_set("test_support") {

components/crash/content/app/chrome_crashpad_handler.cc

@@ -2,22 +2,9 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include <memory>
-
-#include "components/gwp_asan/buildflags/buildflags.h"
-#include "third_party/crashpad/crashpad/handler/handler_main.h"
-#include "third_party/crashpad/crashpad/handler/user_stream_data_source.h"
-
-#if BUILDFLAG(ENABLE_GWP_ASAN)
-#include "components/gwp_asan/crash_handler/crash_handler.h"
-#endif
+// Forward declare this for macOS (it's only defined by crashpad on Android.)
+extern "C" int CrashpadHandlerMain(int argc, char* argv[]);
 
 int main(int argc, char* argv[]) {
-  crashpad::UserStreamDataSources user_stream_data_sources;
-#if BUILDFLAG(ENABLE_GWP_ASAN)
-  user_stream_data_sources.push_back(
-      std::make_unique<gwp_asan::UserStreamDataSource>());
-#endif
-
-  return crashpad::HandlerMain(argc, argv, &user_stream_data_sources);
+  return CrashpadHandlerMain(argc, argv);
 }

components/crash/content/app/crashpad_android.cc

@@ -397,7 +397,7 @@ bool GetHandlerPath(base::FilePath* exe_dir, base::FilePath* handler_path) {
   if (!base::PathService::Get(base::DIR_MODULE, exe_dir)) {
     return false;
   }
-  *handler_path = exe_dir->Append("libcrashpad_handler.so");
+  *handler_path = exe_dir->Append("libchrome_crashpad_handler.so");
   return true;
 }
 

content/shell/android/BUILD.gn

@@ -170,20 +170,20 @@ android_apk("content_shell_apk") {
     "//base:base_java",
     "//base:base_java_test_support",
     "//components/crash/android:java",
+    "//components/crash/content/app:chrome_crashpad_handler_named_as_so",
     "//content/public/android:content_java",
     "//content/public/test/android:android_test_message_pump_support_java",
     "//media/capture/video/android:capture_java",
     "//net/android:net_java",
     "//services/shape_detection:shape_detection_java",
-    "//third_party/crashpad/crashpad/handler:crashpad_handler_named_as_so",
     "//third_party/mesa_headers",
     "//ui/android:ui_java",
   ]
   apk_name = "ContentShell"
   android_manifest = content_shell_manifest
   android_manifest_dep = ":content_shell_manifest"
   shared_libraries = [ ":libcontent_shell_content_view" ]
-  loadable_modules = [ "$root_out_dir/libcrashpad_handler.so" ]
+  loadable_modules = [ "$root_out_dir/libchrome_crashpad_handler.so" ]
   command_line_flags_file = "content-shell-command-line"
 }
 

docs/android_native_libraries.md

@@ -19,9 +19,9 @@ This doc outlines some tricks / gotchas / features of how we ship native code in
    dump is requested (e.g. after a crash), a Crashpad handler process is started
    to produce a dump.
  * Chrome and ChromeModern (Android J through M):
-   * libcrashpad_handler.so is a standalone executable containing all of the
-     crash dumping code. It is stored compressed and extracted automatically by
-     the system, allowing it to be directly executed to produce a crash dump.
+   * libchrome_crashpad_handler.so is a standalone executable containing all of
+     the crash dumping code. It is stored compressed and extracted automatically
+     by the system, allowing it to be directly executed to produce a crash dump.
  * Monochrome (N through P) and SystemWebView (L through P):
     * All of the Crashpad code is linked into the package's main native library
       (e.g. libmonochrome.so). When a dump is requested, /system/bin/app_process