win: support x64 reading x86 (wow64)

snapshot/win/crashpad_snapshot_test_crashing_child.cc

Index: snapshot/win/crashpad_snapshot_test_crashing_child.cc
diff --git a/handler/win/crashy_test_program.cc b/snapshot/win/crashpad_snapshot_test_crashing_child.cc
similarity index 50%
copy from handler/win/crashy_test_program.cc
copy to snapshot/win/crashpad_snapshot_test_crashing_child.cc
index 07c9cf101278213f36b55e3025b8b1c88ece15a4..d74f6a62bddc3ac1e16aa0090a8adf4d95009fbd 100644
--- a/handler/win/crashy_test_program.cc
+++ b/snapshot/win/crashpad_snapshot_test_crashing_child.cc
@@ -12,43 +12,32 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include "client/crashpad_client.h"
+#include <stdint.h>
+#include <stdlib.h>
+#include <windows.h>
 
 #include "base/logging.h"
-#include "tools/tool_support.h"
-
-namespace crashpad {
-namespace {
+#include "client/crashpad_client.h"
+#include "util/file/file_io.h"
+#include "util/win/address_types.h"
 
-void SomeCrashyFunction() {
-  volatile int* foo = reinterpret_cast<volatile int*>(7);
-  *foo = 42;
+__declspec(noinline) crashpad::WinVMAddress CurrentAddress() {
+  return reinterpret_cast<crashpad::WinVMAddress>(_ReturnAddress());
 }
 
-int CrashyMain(int argc, char* argv[]) {
-  if (argc != 2) {
-    fprintf(stderr, "Usage: %s <server_pipe_name>\n", argv[0]);
-    return 1;
-  }
+int main(int argc, char* argv[]) {
+  CHECK_EQ(argc, 2);
 
-  CrashpadClient client;
-  if (!client.SetHandler(argv[1])) {
-    LOG(ERROR) << "SetHandler";
-    return 1;
-  }
-  if (!client.UseHandler()) {
-    LOG(ERROR) << "UseHandler";
-    return 1;
-  }
+  crashpad::CrashpadClient client;
+  CHECK(client.SetHandler(argv[1]));
+  CHECK(client.UseHandler());
 
-  SomeCrashyFunction();
+  HANDLE out = GetStdHandle(STD_OUTPUT_HANDLE);
+  CHECK_NE(out, INVALID_HANDLE_VALUE);
+  crashpad::WinVMAddress break_address = CurrentAddress();
+  crashpad::CheckedWriteFile(out, &break_address, sizeof(break_address));
 
-  return 0;
-}
-
-}  // namespace
-}  // namespace crashpad
+  __debugbreak();
 
-int wmain(int argc, wchar_t* argv[]) {
-  return crashpad::ToolSupport::Wmain(argc, argv, crashpad::CrashyMain);
+  return 0;
 }