Brian Hamrick | d57e133 | 2019-04-24 11:25:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2019 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include "src/trace_processor/fuchsia_trace_utils.h" |
| 18 | |
| 19 | namespace perfetto { |
| 20 | namespace trace_processor { |
| 21 | namespace fuchsia_trace_utils { |
| 22 | |
| 23 | namespace { |
Brian Hamrick | fc07431 | 2019-04-25 14:50:31 -0700 | [diff] [blame] | 24 | constexpr uint32_t kInlineStringMarker = 0x8000; |
| 25 | constexpr uint32_t kInlineStringLengthMask = 0x7FFF; |
Brian Hamrick | d57e133 | 2019-04-24 11:25:36 -0700 | [diff] [blame] | 26 | } // namespace |
| 27 | |
| 28 | bool IsInlineString(uint32_t string_ref) { |
| 29 | // Treat a string ref of 0 (the empty string) as inline. The empty string is |
| 30 | // not a true entry in the string table. |
| 31 | return (string_ref & kInlineStringMarker) || (string_ref == 0); |
| 32 | } |
| 33 | |
| 34 | base::StringView ReadInlineString(const uint64_t** current_ptr, |
| 35 | uint32_t string_ref) { |
| 36 | // Note that this works correctly for the empty string, where string_ref is 0. |
| 37 | size_t len = string_ref & kInlineStringLengthMask; |
| 38 | size_t len_words = (len + 7) / 8; |
| 39 | base::StringView s(reinterpret_cast<const char*>(*current_ptr), len); |
| 40 | *current_ptr += len_words; |
| 41 | return s; |
| 42 | } |
| 43 | |
| 44 | bool IsInlineThread(uint32_t thread_ref) { |
| 45 | return thread_ref == 0; |
| 46 | } |
| 47 | |
| 48 | ThreadInfo ReadInlineThread(const uint64_t** current_ptr) { |
| 49 | ThreadInfo ret; |
| 50 | ret.pid = **current_ptr; |
| 51 | (*current_ptr)++; |
| 52 | ret.tid = **current_ptr; |
| 53 | (*current_ptr)++; |
| 54 | return ret; |
| 55 | } |
| 56 | |
| 57 | int64_t ReadTimestamp(const uint64_t** current_ptr, uint64_t ticks_per_second) { |
| 58 | uint64_t ticks = **current_ptr; |
| 59 | (*current_ptr)++; |
| 60 | return TicksToNs(ticks, ticks_per_second); |
| 61 | } |
| 62 | |
| 63 | int64_t TicksToNs(uint64_t ticks, uint64_t ticks_per_second) { |
| 64 | return static_cast<int64_t>(ticks * uint64_t(1000000000) / ticks_per_second); |
| 65 | } |
| 66 | |
| 67 | } // namespace fuchsia_trace_utils |
| 68 | } // namespace trace_processor |
| 69 | } // namespace perfetto |