gn, android: Build for Android with GN

With a companion mini_chromium change at https://crrev.com/c/841203,
it’s possible to configure via “gn args” as follows:

android_ndk = "/android/android-ndk-r16"
target_cpu = "x86_64"
target_os = "android"

Note that a standalone toolchain is not required.

Bug: crashpad:30, crashpad:79
Change-Id: Ica55bdcb82c730909c05dd9fecb40a74eca78c8a
Reviewed-on: https://chromium-review.googlesource.com/841286
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
Reviewed-by: Robert Sesek <rsesek@chromium.org>

compat/BUILD.gn

@@ -21,10 +21,14 @@ config("compat_config") {
     include_dirs += [ "mac" ]
   }
 
-  if (crashpad_is_linux) {
+  if (crashpad_is_linux || crashpad_is_android) {
     include_dirs += [ "linux" ]
   }
 
+  if (crashpad_is_android) {
+    include_dirs += [ "android" ]
+  }
+
   if (crashpad_is_win) {
     include_dirs += [ "win" ]
   } else {
@@ -61,13 +65,29 @@ compat_target("compat") {
     sources += [ "non_mac/mach/mach.h" ]
   }
 
-  if (crashpad_is_linux) {
+  if (crashpad_is_linux || crashpad_is_android) {
     sources += [
       "linux/signal.h",
       "linux/sys/ptrace.h",
     ]
   }
 
+  if (crashpad_is_android) {
+    sources += [
+      "android/elf.h",
+      "android/linux/elf.h",
+      "android/linux/prctl.h",
+      "android/linux/ptrace.h",
+      "android/sched.h",
+      "android/sys/epoll.cc",
+      "android/sys/epoll.h",
+      "android/sys/mman.cc",
+      "android/sys/mman.h",
+      "android/sys/syscall.h",
+      "android/sys/user.h",
+    ]
+  }
+
   if (crashpad_is_win) {
     sources += [
       "win/getopt.h",

handler/BUILD.gn

@@ -37,7 +37,7 @@ static_library("handler") {
     ]
   }
 
-  if (crashpad_is_linux) {
+  if (crashpad_is_linux || crashpad_is_android) {
     sources += [
       "linux/exception_handler_server.cc",
       "linux/exception_handler_server.h",
@@ -89,7 +89,7 @@ source_set("handler_test") {
     "minidump_to_upload_parameters_test.cc",
   ]
 
-  if (crashpad_is_linux) {
+  if (crashpad_is_linux || crashpad_is_android) {
     sources += [ "linux/exception_handler_server_test.cc" ]
   }
 

snapshot/BUILD.gn

@@ -98,7 +98,7 @@ static_library("snapshot") {
     ]
   }
 
-  if (crashpad_is_linux) {
+  if (crashpad_is_linux || crashpad_is_android) {
     sources += [
       "elf/elf_dynamic_array_reader.cc",
       "elf/elf_dynamic_array_reader.h",
@@ -252,7 +252,7 @@ static_library("test_support") {
 
 config("snapshot_test_link") {
   visibility = [ ":*" ]
-  if (crashpad_is_linux) {
+  if (crashpad_is_linux || crashpad_is_android) {
     # There’s no way to make the link depend on this file. “inputs” doesn’t have
     # the intended effect in a config. https://crbug.com/781858,
     # https://crbug.com/796187.
@@ -283,7 +283,7 @@ source_set("snapshot_test") {
     ]
   }
 
-  if (crashpad_is_linux) {
+  if (crashpad_is_linux || crashpad_is_android) {
     sources += [
       "elf/elf_image_reader_test.cc",
       "elf/elf_image_reader_test_note.S",
@@ -345,7 +345,7 @@ source_set("snapshot_test") {
     ]
   }
 
-  if (crashpad_is_linux) {
+  if (crashpad_is_linux || crashpad_is_android) {
     libs = [ "dl" ]
   }
 

test/BUILD.gn

@@ -65,7 +65,7 @@ static_library("test") {
     ]
   }
 
-  if (crashpad_is_linux) {
+  if (crashpad_is_linux || crashpad_is_android) {
     sources += [
       "linux/fake_ptrace_connection.cc",
       "linux/fake_ptrace_connection.h",

third_party/gtest/BUILD.gn

@@ -90,9 +90,7 @@ if (crashpad_is_in_chromium) {
     ]
     sources -= [ "gtest/googletest/src/gtest-all.cc" ]
     public_configs = [ ":gtest_public_config" ]
-    configs -= [
+    configs -= [ "//third_party/mini_chromium/mini_chromium/build:Wexit_time_destructors" ]
-      "//third_party/mini_chromium/mini_chromium/build:Wexit_time_destructors",
-    ]
     configs += [ ":gtest_private_config" ]
   }
 
@@ -129,9 +127,7 @@ if (crashpad_is_in_chromium) {
       "gtest/googletest/test/production.cc",
       "gtest/googletest/test/production.h",
     ]
-    configs -= [
+    configs -= [ "//third_party/mini_chromium/mini_chromium/build:Wexit_time_destructors" ]
-      "//third_party/mini_chromium/mini_chromium/build:Wexit_time_destructors",
-    ]
     configs += [ ":gtest_private_config" ]
     deps = [
       ":gtest",
@@ -173,9 +169,7 @@ if (crashpad_is_in_chromium) {
       "gtest/googletest/test/gtest-param-test_test.cc",
       "gtest/googletest/test/gtest-param-test_test.h",
     ]
-    configs -= [
+    configs -= [ "//third_party/mini_chromium/mini_chromium/build:Wexit_time_destructors" ]
-      "//third_party/mini_chromium/mini_chromium/build:Wexit_time_destructors",
-    ]
     configs += [ ":gtest_private_config" ]
     deps = [
       ":gtest",
@@ -303,9 +297,7 @@ if (crashpad_is_in_chromium) {
     ]
     sources -= [ "gtest/googlemock/src/gmock-all.cc" ]
     public_configs = [ ":gmock_public_config" ]
-    configs -= [
+    configs -= [ "//third_party/mini_chromium/mini_chromium/build:Wexit_time_destructors" ]
-      "//third_party/mini_chromium/mini_chromium/build:Wexit_time_destructors",
-    ]
     configs += [ ":gmock_private_config" ]
     deps = [
       ":gtest",
@@ -378,9 +370,7 @@ if (crashpad_is_in_chromium) {
     sources = [
       "gtest/googlemock/test/gmock_stress_test.cc",
     ]
-    configs -= [
+    configs -= [ "//third_party/mini_chromium/mini_chromium/build:Wexit_time_destructors" ]
-      "//third_party/mini_chromium/mini_chromium/build:Wexit_time_destructors",
-    ]
     configs += [ ":gmock_private_config" ]
     deps = [
       ":gmock",

util/BUILD.gn

@@ -241,6 +241,10 @@ static_library("util") {
   }
 
   if (crashpad_is_linux) {
+    sources += [ "net/http_transport_libcurl.cc" ]
+  }
+
+  if (crashpad_is_linux || crashpad_is_android) {
     sources += [
       "linux/address_types.h",
       "linux/auxiliary_vector.cc",
@@ -269,7 +273,6 @@ static_library("util") {
       "linux/thread_info.h",
       "linux/traits.h",
       "misc/paths_linux.cc",
-      "net/http_transport_libcurl.cc",
       "posix/process_info_linux.cc",
       "process/process_memory_linux.cc",
       "process/process_memory_linux.h",
@@ -450,11 +453,16 @@ source_set("util_test") {
     "thread/worker_thread_test.cc",
   ]
 
-  if (!crashpad_is_fuchsia) {
+  if (!crashpad_is_android && !crashpad_is_fuchsia) {
-    # TODO(scottmg): This requires an implementation of MultiprocessExec for
+    # Android and Fuchsia will each require an HTTPTransport implementation
-    # testing, and a solution to http_transport_test_server.py -- either a port
+    # (libcurl isn’t in either’s SDK) and a solution to
-    # to non-Python, or method of forwarding those requests back to the builder
+    # http_transport_test_server.py, because Python isn’t available on either.
+    # The latter could be ported to non-Python, or the test server could run on
+    # the build host with a method to forward requests from the device to the
     # host.
+    #
+    # TODO(scottmg): Fuchsia will also require an implementation of
+    # MultiprocessExec for testing.
     sources += [ "net/http_transport_test.cc" ]
   }
 
@@ -493,7 +501,7 @@ source_set("util_test") {
     ]
   }
 
-  if (crashpad_is_linux) {
+  if (crashpad_is_linux || crashpad_is_android) {
     sources += [
       "linux/auxiliary_vector_test.cc",
       "linux/memory_map_test.cc",