| // Copyright 2019 The Fuchsia 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 "fuchsia.h" |
| |
| #include <magma.h> |
| #include <magma_util/dlog.h> |
| #include <magma_util/macros.h> |
| #include <pthread.h> |
| #include <zircon/syscalls.h> |
| |
| static fuchsia_open_callback_t g_open_callback; |
| static pthread_once_t g_initialize_flag = PTHREAD_ONCE_INIT; |
| |
| static void initialize() |
| { |
| uint32_t client_handle; |
| if (!fuchsia_open("/svc/fuchsia.tracing.provider.Registry", &client_handle)) { |
| DLOG("Connecting to trace provider failed"); |
| return; |
| } |
| magma_status_t status = magma_initialize_tracing(client_handle); |
| if (status != MAGMA_STATUS_OK) { |
| DLOG("Initializing tracing failed: %d", status); |
| } |
| } |
| |
| void fuchsia_init(fuchsia_open_callback_t open_callback) |
| { |
| g_open_callback = open_callback; |
| |
| // Multiple loader instances may call this multiple times. |
| pthread_once(&g_initialize_flag, &initialize); |
| } |
| |
| bool fuchsia_open(const char* name, zx_handle_t* channel_out) |
| { |
| if (!g_open_callback) |
| return DRETF(false, "No open callback"); |
| |
| zx_handle_t client_handle, service_handle; |
| zx_status_t status = zx_channel_create(0, &client_handle, &service_handle); |
| if (status != ZX_OK) |
| return DRETF(false, "Channel create failed: %d", status); |
| |
| int result = g_open_callback(name, service_handle); |
| if (result != 0) |
| return DRETF(false, "g_open_callback failed: %d", result); |
| |
| *channel_out = client_handle; |
| return true; |
| } |