1 /*
2 * Copyright (C) 2022 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 "perfetto/base/thread_utils.h"
18 #include "perfetto/ext/base/thread_utils.h"
19
20 #include "perfetto/base/build_config.h"
21
22 #if PERFETTO_BUILDFLAG(PERFETTO_OS_FUCHSIA)
23 #include <zircon/process.h>
24 #include <zircon/syscalls.h>
25 #include <zircon/types.h>
26 #elif PERFETTO_BUILDFLAG(PERFETTO_OS_WIN)
27 #include <Windows.h>
28 #endif
29
30 namespace perfetto {
31 namespace base {
32
33 #if PERFETTO_BUILDFLAG(PERFETTO_OS_FUCHSIA)
ResolveThreadId()34 static PlatformThreadId ResolveThreadId() {
35 zx_info_handle_basic_t basic;
36 return (zx_object_get_info(zx_thread_self(), ZX_INFO_HANDLE_BASIC, &basic,
37 sizeof(basic), nullptr, nullptr) == ZX_OK)
38 ? basic.koid
39 : ZX_KOID_INVALID;
40 }
GetThreadId()41 PlatformThreadId GetThreadId() {
42 thread_local static PlatformThreadId thread_id = ResolveThreadId();
43 return thread_id;
44 }
45
46 #elif PERFETTO_BUILDFLAG(PERFETTO_OS_WIN)
47
48 // The SetThreadDescription API was brought in version 1607 of Windows 10.
49 typedef HRESULT(WINAPI* SetThreadDescription)(HANDLE hThread,
50 PCWSTR lpThreadDescription);
51
52 // The SetThreadDescription API was brought in version 1607 of Windows 10.
53 typedef HRESULT(WINAPI* GetThreadDescription)(HANDLE hThread,
54 PWSTR* ppszThreadDescription);
55
56 bool MaybeSetThreadName(const std::string& name) {
57 // The SetThreadDescription API works even if no debugger is attached.
58 static auto set_thread_description_func =
59 reinterpret_cast<SetThreadDescription>(
60 reinterpret_cast<void*>(::GetProcAddress(
61 ::GetModuleHandleA("Kernel32.dll"), "SetThreadDescription")));
62 if (!set_thread_description_func) {
63 return false;
64 }
65 std::wstring wide_thread_name;
66 if (!UTF8ToWide(name, wide_thread_name)) {
67 return false;
68 }
69 HRESULT result = set_thread_description_func(::GetCurrentThread(),
70 wide_thread_name.c_str());
71 return !FAILED(result);
72 }
73
74 bool GetThreadName(std::string& out_result) {
75 static auto get_thread_description_func =
76 reinterpret_cast<GetThreadDescription>(
77 reinterpret_cast<void*>(::GetProcAddress(
78 ::GetModuleHandleA("Kernel32.dll"), "GetThreadDescription")));
79 if (!get_thread_description_func) {
80 return false;
81 }
82 wchar_t* wide_thread_name;
83 HRESULT result =
84 get_thread_description_func(::GetCurrentThread(), &wide_thread_name);
85 if (SUCCEEDED(result)) {
86 bool success = WideToUTF8(std::wstring(wide_thread_name), out_result);
87 LocalFree(wide_thread_name);
88 return success;
89 }
90 return false;
91 }
92
93 #endif // PERFETTO_BUILDFLAG(PERFETTO_OS_FUCHSIA)
94
95 } // namespace base
96 } // namespace perfetto
97