| /* |
| * Copyright (C) 2017 Intel Corporation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef LOG_TAG |
| #define LOG_TAG "IA_TRACE" |
| #endif |
| |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <limits.h> |
| #include <pthread.h> |
| #include <stdbool.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/types.h> |
| |
| #include "IaAtrace.h" |
| |
| namespace cros { |
| namespace intel { |
| |
| volatile int32_t ia_trace_is_ready = 0; |
| uint64_t ia_trace_enabled_tags = IA_TRACE_TAG_NOT_READY; |
| int ia_trace_marker_fd = -1; |
| static pthread_once_t ia_trace_once_control = PTHREAD_ONCE_INIT; |
| |
| static inline __attribute__((always_inline)) void |
| ia_trace_atomic_release_store(int32_t value, volatile int32_t *ptr) |
| { |
| __asm__ __volatile__ ("" : : : "memory"); |
| *ptr = value; |
| } |
| |
| static void ia_trace_init_once(void) |
| { |
| ia_trace_marker_fd = open("/sys/kernel/debug/tracing/trace_marker", O_WRONLY); |
| if (ia_trace_marker_fd == -1) { |
| LOGE("open error!"); |
| return; |
| } |
| ia_trace_enabled_tags = IA_TRACE_TAG_ALWAYS; |
| ia_trace_atomic_release_store(1, &ia_trace_is_ready); |
| } |
| |
| void ia_trace_setup(void) |
| { |
| pthread_once(&ia_trace_once_control, ia_trace_init_once); |
| } |
| |
| } /* namespace intel */ |
| } /* namespace cros */ |