1 /*
2 * Copyright (C) 2018 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/ext/tracing/ipc/default_socket.h"
18
19 #include "perfetto/base/build_config.h"
20 #include "perfetto/base/logging.h"
21 #include "perfetto/ext/base/utils.h"
22 #include "perfetto/ext/ipc/basic_types.h"
23 #include "perfetto/ext/tracing/core/basic_types.h"
24
25 #include <stdlib.h>
26 #include <unistd.h>
27
28 namespace perfetto {
29 #if !PERFETTO_BUILDFLAG(PERFETTO_OS_ANDROID)
30 // On non-Android platforms, check /run/perfetto/ before using /tmp/ as the
31 // socket base directory.
32 namespace {
33 const char* kRunPerfettoBaseDir = "/run/perfetto/";
34
UseRunPerfettoBaseDir()35 bool UseRunPerfettoBaseDir() {
36 #if PERFETTO_BUILDFLAG(PERFETTO_OS_LINUX) || \
37 PERFETTO_BUILDFLAG(PERFETTO_OS_ANDROID) || \
38 PERFETTO_BUILDFLAG(PERFETTO_OS_APPLE)
39 // Note that the trailing / in |kRunPerfettoBaseDir| ensures we are checking
40 // against a directory, not a file.
41 int res = PERFETTO_EINTR(access(kRunPerfettoBaseDir, X_OK));
42 if (!res)
43 return true;
44
45 // If the path doesn't exist (ENOENT), fail silently to the caller. Otherwise,
46 // fail with an explicit error message.
47 if (errno != ENOENT) {
48 PERFETTO_PLOG("%s exists but cannot be accessed. Falling back on /tmp/ ",
49 kRunPerfettoBaseDir);
50 }
51 return false;
52 #else
53 return false;
54 #endif
55 }
56
57 } // anonymous namespace
58 #endif // !PERFETTO_BUILDFLAG(PERFETTO_OS_ANDROID)
59
60 static_assert(kInvalidUid == ipc::kInvalidUid, "kInvalidUid mismatching");
61
GetProducerSocket()62 const char* GetProducerSocket() {
63 const char* name = getenv("PERFETTO_PRODUCER_SOCK_NAME");
64 if (name == nullptr) {
65 #if PERFETTO_BUILDFLAG(PERFETTO_OS_WIN)
66 name = "127.0.0.1:32278";
67 #elif PERFETTO_BUILDFLAG(PERFETTO_OS_ANDROID)
68 name = "/dev/socket/traced_producer";
69 #else
70 // Use /run/perfetto if it exists. Then fallback to /tmp.
71 static const char* producer_socket =
72 UseRunPerfettoBaseDir() ? "/run/perfetto/traced-producer.sock"
73 : "/tmp/perfetto-producer";
74 name = producer_socket;
75 #endif
76 }
77 return name;
78 }
79
GetConsumerSocket()80 const char* GetConsumerSocket() {
81 const char* name = getenv("PERFETTO_CONSUMER_SOCK_NAME");
82 if (name == nullptr) {
83 #if PERFETTO_BUILDFLAG(PERFETTO_OS_WIN)
84 name = "127.0.0.1:32279";
85 #elif PERFETTO_BUILDFLAG(PERFETTO_OS_ANDROID)
86 name = "/dev/socket/traced_consumer";
87 #else
88 // Use /run/perfetto if it exists. Then fallback to /tmp.
89 static const char* consumer_socket =
90 UseRunPerfettoBaseDir() ? "/run/perfetto/traced-consumer.sock"
91 : "/tmp/perfetto-consumer";
92 name = consumer_socket;
93 #endif
94 }
95 return name;
96 }
97
98 } // namespace perfetto
99