1 /*
2 * Copyright (C) 2024 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/importers/etm/mapping_version.h"
18
19 #include <cstddef>
20 #include <cstdint>
21 #include <cstring>
22 #include <optional>
23
24 #include "perfetto/base/logging.h"
25 #include "perfetto/trace_processor/trace_blob_view.h"
26 #include "src/trace_processor/importers/common/address_range.h"
27
28 namespace perfetto::trace_processor::etm {
29
MappingVersion(MappingId id,int64_t create_ts,AddressRange range,std::optional<TraceBlobView> content)30 MappingVersion::MappingVersion(MappingId id,
31 int64_t create_ts,
32 AddressRange range,
33 std::optional<TraceBlobView> content)
34 : id_(id), create_ts_(create_ts), range_(range) {
35 if (content) {
36 content_ = std::move(*content);
37 }
38 PERFETTO_CHECK(content_.size() == range.length() ||
39 content_.data() == nullptr);
40 }
41
SplitFront(uint64_t mid)42 MappingVersion MappingVersion::SplitFront(uint64_t mid) {
43 PERFETTO_CHECK(range_.start() < mid && mid < range_.end());
44 AddressRange head(range_.start(), mid);
45 AddressRange tail(mid, range_.end());
46 uint64_t offset = mid - range_.start();
47
48 TraceBlobView head_content;
49 TraceBlobView tail_content;
50 if (content_.size() != 0) {
51 head_content = content_.slice_off(0, offset);
52 tail_content = content_.slice_off(offset, content_.size() - offset);
53 }
54
55 range_ = tail;
56 content_ = std::move(tail_content);
57
58 return MappingVersion(id_, create_ts_, head, std::move(head_content));
59 }
60
61 } // namespace perfetto::trace_processor::etm
62