Merge "Fix net_test_bluetooth"

#define LOG_TAG "hal_util"

#include <base/logging.h>

#include <base/strings/stringprintf.h>

#include <hardware/bluetooth.h>

#include <hardware/hardware.h>

#include "btcore/include/hal_util.h"

#include "osi/include/log.h"

// TODO(armansito): All logging macros should include __func__ by default (see

// Bug: 22671731)

#define HULOGERR(fmt, args...)                                          \

  LOG_ERROR(LOG_TAG, "[%s] failed to load the Bluetooth library: " fmt, \

            __func__, ##args)

using base::StringPrintf;

// TODO(armansito): It might be better to pass the library name in a more

// generic manner as opposed to hard-coding it here.

static const char kBluetoothLibraryName[] = "bluetooth.default.so";

#define BLUETOOTH_LIBRARY_NAME "bluetooth.default.so"

#if defined(__LP64__)

#define BACKUP_PATH "/system/lib64/hw/" BLUETOOTH_LIBRARY_NAME

#else

#define BACKUP_PATH "/system/lib/hw/" BLUETOOTH_LIBRARY_NAME

#endif

int hal_util_load_bt_library(const struct hw_module_t** module) {

  const char* id = BT_STACK_MODULE_ID;

  struct hw_module_t* hmi = nullptr;

  // Always try to load the default Bluetooth stack on GN builds.

  void* handle = dlopen(kBluetoothLibraryName, RTLD_NOW);

  const char* path = BLUETOOTH_LIBRARY_NAME;

  void* handle = dlopen(path, RTLD_NOW);

  if (!handle) {

    char const* err_str = dlerror();

    HULOGERR("%s", err_str ? err_str : "error unknown");

    const char* err_str = dlerror();

    LOG(WARNING) << __func__ << ": failed to load Bluetooth library " << path

                 << ", error=" << (err_str ? err_str : "error unknown");

    path = BACKUP_PATH;

    LOG(WARNING) << __func__ << ": loading backup path " << path;

    handle = dlopen(path, RTLD_NOW);

    if (!handle) {

      err_str = dlerror();

      LOG(ERROR) << __func__ << ": failed to load Bluetooth library " << path

                 << ", error=" << (err_str ? err_str : "error unknown");

      goto error;

    }

  }

  // Get the address of the struct hal_module_info.

  hmi = (struct hw_module_t*)dlsym(handle, sym);

  if (!hmi) {

    HULOGERR("%s", sym);

    LOG(ERROR) << __func__ << ": failed to load symbol from Bluetooth library "

               << sym;

    goto error;

  }

  // Check that the id matches.

  if (strcmp(id, hmi->id) != 0) {

    HULOGERR("id=%s does not match HAL module ID: %s", id, hmi->id);

    LOG(ERROR) << StringPrintf("%s: id=%s does not match HAL module ID: %s",

                               __func__, id, hmi->id);

    goto error;

  }

  hmi->dso = handle;

  // Success.

  LOG_INFO(LOG_TAG, "[%s] loaded HAL id=%s path=%s hmi=%p handle=%p", __func__,

           id, kBluetoothLibraryName, hmi, handle);

  LOG(INFO) << StringPrintf("%s: loaded HAL id=%s path=%s hmi=%p handle=%p",

                            __func__, id, path, hmi, handle);

  *module = hmi;

  return 0;