Cherry pick 18.4 changes to udc-widevine-dev

Get the udc-widevine-dev Android branch and oemcrypto-v18 cdm branch in
sync. The commit ID for 18.4 on oemcrypto-v18 is
a2f23a2281e5e06dc2867585bdc516fa132b6396.

Merged from go/wvgerrit/190151

Bug: 290252845
Test: WVTS tests are running and passing
Change-Id: I457332e7ca70a5b5169345e1279b3eb9f18413b6

libwvdrmengine/cdm/test/perf_test_dynamic.cpp

@@ -0,0 +1,84 @@
+// Copyright 2021 Google LLC. All Rights Reserved. This file and proprietary
+// source code may only be used and distributed under the Widevine License
+// Agreement.
+
+// This uses dlopen() which is only usable on POSIX platforms.  The function
+// names assume GCC/Clang.
+
+#include <dlfcn.h>
+#include <gtest/gtest.h>
+#include <stdio.h>
+
+#include <fstream>
+#include <tuple>
+
+#include "clock.h"
+#include "perf_test.h"
+#include "test_host.h"
+
+namespace widevine {
+
+constexpr char kInitName[] =
+    "_ZN8widevine3Cdm10initializeENS0_16SecureOutputTypeEPNS0_8IStorageEPNS0_"
+    "6IClockEPNS0_6ITimerEPNS0_7ILoggerENS0_8LogLevelE";
+constexpr char kCreateName[] =
+    "_ZN8widevine3Cdm6createEPNS0_14IEventListenerEPNS0_8IStorageEbb";
+
+bool ReadFile(const std::string& path, std::string* output) {
+  constexpr size_t kReadSize = 8 * 1024;
+  std::ifstream fs(path, std::ios::in | std::ios::binary);
+  if (!fs) return false;
+  while (true) {
+    const size_t offset = output->size();
+    output->resize(output->size() + kReadSize);
+    fs.read(&output->at(offset), kReadSize);
+    if (fs.eof()) {
+      output->resize(offset + fs.gcount());
+      return true;
+    } else if (!fs) {
+      fprintf(stderr, "Error reading from cert file\n");
+      return false;
+    }
+  }
+}
+
+std::tuple<InitFuncType, CreateFuncType> LoadCdm(const char* path) {
+  // Note we will leak the library object; but this is just for tests and will
+  // be unloaded when we exit anyway.
+  auto dll = dlopen(path, RTLD_NOW);
+  if (!dll) {
+    fprintf(stderr, "Error loading so file: %s\n", dlerror());
+    exit(1);
+  }
+
+  auto init = reinterpret_cast<InitFuncType>(dlsym(dll, kInitName));
+  auto create = reinterpret_cast<CreateFuncType>(dlsym(dll, kCreateName));
+  if (!init || !create) {
+    fprintf(stderr, "Error finding CDM functions: %s\n", dlerror());
+    exit(1);
+  }
+  return std::make_tuple(init, create);
+}
+
+}  // namespace widevine
+
+namespace wvutil {
+
+int64_t Clock::GetCurrentTime() { return g_host->now() / 1000; }
+
+}  // namespace wvutil
+
+int main(int argc, char** argv) {
+  testing::InitGoogleTest(&argc, argv);
+  if (argc != 3) {
+    fprintf(stderr, "Usage: %s <CDM_SO_PATH> <CERT_PATH>\n", argv[0]);
+    return 1;
+  }
+
+  std::string cert;
+  if (!widevine::ReadFile(argv[2], &cert))
+    return 1;
+
+  auto funcs = widevine::LoadCdm(argv[1]);
+  return widevine::PerfTestMain(std::get<0>(funcs), std::get<1>(funcs), cert);
+}