1
2 /*
3 * Copyright (C) 2020 The Android Open Source Project
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 #include "src/profiling/symbolizer/scoped_read_mmap.h"
19
20 #if PERFETTO_BUILDFLAG(PERFETTO_OS_WIN)
21
22 #include <Windows.h>
23
24 namespace perfetto {
25 namespace profiling {
26
ScopedReadMmap(const char * fName,size_t length)27 ScopedReadMmap::ScopedReadMmap(const char* fName, size_t length)
28 : length_(length), ptr_(nullptr) {
29 file_ = CreateFileA(fName, GENERIC_READ, FILE_SHARE_READ, nullptr,
30 OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, nullptr);
31 if (file_ == INVALID_HANDLE_VALUE) {
32 PERFETTO_DLOG("Failed to open file: %s", fName);
33 return;
34 }
35 map_ = CreateFileMapping(file_, nullptr, PAGE_READONLY, 0, 0, nullptr);
36 if (map_ == INVALID_HANDLE_VALUE) {
37 PERFETTO_DLOG("Failed to mmap file");
38 return;
39 }
40 ptr_ = MapViewOfFile(map_, FILE_MAP_READ, 0, 0, length_);
41 if (ptr_ == nullptr) {
42 PERFETTO_DLOG("Failed to map view of file");
43 }
44 }
45
~ScopedReadMmap()46 ScopedReadMmap::~ScopedReadMmap() {
47 if (ptr_ != nullptr) {
48 UnmapViewOfFile(ptr_);
49 }
50 if (map_ != nullptr && map_ != INVALID_HANDLE_VALUE) {
51 CloseHandle(map_);
52 }
53 if (file_ != nullptr && file_ != INVALID_HANDLE_VALUE) {
54 CloseHandle(file_);
55 }
56 }
57
IsValid()58 bool ScopedReadMmap::IsValid() {
59 return ptr_ != nullptr;
60 }
61
62 } // namespace profiling
63 } // namespace perfetto
64
65 #endif // PERFETTO_BUILDFLAG(PERFETTO_OS_WIN)
66