Repo created

TMessagesProj/jni/voip/webrtc/base/native_library_fuchsia.cc

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+// Copyright 2018 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.
+
+#include "base/native_library.h"
+
+#include <fcntl.h>
+#include <fuchsia/io/cpp/fidl.h>
+#include <lib/fdio/directory.h>
+#include <lib/fdio/io.h>
+#include <lib/zx/vmo.h>
+#include <stdio.h>
+#include <zircon/dlfcn.h>
+#include <zircon/status.h>
+#include <zircon/syscalls.h>
+
+#include "base/base_paths_fuchsia.h"
+#include "base/files/file.h"
+#include "base/files/file_path.h"
+#include "base/fuchsia/fuchsia_logging.h"
+#include "base/logging.h"
+#include "base/path_service.h"
+#include "base/posix/safe_strerror.h"
+#include "base/strings/stringprintf.h"
+#include "base/strings/utf_string_conversions.h"
+#include "base/threading/thread_restrictions.h"
+
+namespace base {
+
+std::string NativeLibraryLoadError::ToString() const {
+  return message;
+}
+
+NativeLibrary LoadNativeLibraryWithOptions(const FilePath& library_path,
+                                           const NativeLibraryOptions& options,
+                                           NativeLibraryLoadError* error) {
+  std::vector<base::FilePath::StringType> components;
+  library_path.GetComponents(&components);
+  if (components.size() != 1u) {
+    NOTREACHED() << "library_path is a path, should be a filename: "
+                 << library_path.MaybeAsASCII();
+    return nullptr;
+  }
+
+  FilePath computed_path;
+  base::PathService::Get(DIR_SOURCE_ROOT, &computed_path);
+  computed_path = computed_path.AppendASCII("lib").Append(components[0]);
+
+  // Use fdio_open_fd (a Fuchsia-specific API) here so we can pass the
+  // appropriate FS rights flags to request executability.
+  // TODO(1018538): Teach base::File about FLAG_EXECUTE on Fuchsia, and then
+  // use it here instead of using fdio_open_fd() directly.
+  base::ScopedFD fd;
+  zx_status_t status = fdio_open_fd(
+      computed_path.value().c_str(),
+      fuchsia::io::OPEN_RIGHT_READABLE | fuchsia::io::OPEN_RIGHT_EXECUTABLE,
+      base::ScopedFD::Receiver(fd).get());
+  if (status != ZX_OK) {
+    if (error) {
+      error->message =
+          base::StringPrintf("fdio_open_fd: %s", zx_status_get_string(status));
+    }
+    return nullptr;
+  }
+
+  zx::vmo vmo;
+  status = fdio_get_vmo_exec(fd.get(), vmo.reset_and_get_address());
+  if (status != ZX_OK) {
+    if (error) {
+      error->message = base::StringPrintf("fdio_get_vmo_exec: %s",
+                                          zx_status_get_string(status));
+    }
+    return nullptr;
+  }
+
+  NativeLibrary result = dlopen_vmo(vmo.get(), RTLD_LAZY | RTLD_LOCAL);
+  return result;
+}
+
+void UnloadNativeLibrary(NativeLibrary library) {
+  // dlclose() is a no-op on Fuchsia, so do nothing here.
+}
+
+void* GetFunctionPointerFromNativeLibrary(NativeLibrary library,
+                                          StringPiece name) {
+  return dlsym(library, name.data());
+}
+
+std::string GetNativeLibraryName(StringPiece name) {
+  return base::StringPrintf("lib%s.so", name.as_string().c_str());
+}
+
+std::string GetLoadableModuleName(StringPiece name) {
+  return GetNativeLibraryName(name);
+}
+
+}  // namespace base