1 /*
2 * Copyright (C) 2023 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/rpc/stdiod.h"
18
19 #include <cstddef>
20 #include <cstdint>
21 #include <memory>
22 #include <utility>
23
24 #include "perfetto/base/build_config.h"
25 #include "perfetto/base/logging.h"
26 #include "perfetto/base/status.h"
27 #include "perfetto/ext/base/file_utils.h"
28 #include "perfetto/ext/base/utils.h"
29 #include "perfetto/trace_processor/trace_processor.h"
30 #include "src/trace_processor/rpc/rpc.h"
31
32 #if !PERFETTO_BUILDFLAG(PERFETTO_OS_WIN)
33 #include <unistd.h>
34 #endif
35
36 #if PERFETTO_BUILDFLAG(PERFETTO_OS_WIN) && !defined(STDIN_FILENO)
37 #define STDIN_FILENO 0
38 #define STDOUT_FILENO 1
39 #endif
40
41 namespace perfetto::trace_processor {
42
RunStdioRpcServer(std::unique_ptr<TraceProcessor> tp)43 base::Status RunStdioRpcServer(std::unique_ptr<TraceProcessor> tp) {
44 Rpc rpc(std::move(tp));
45 char buffer[4096];
46 for (;;) {
47 ssize_t ret = base::Read(STDIN_FILENO, buffer, base::ArraySize(buffer));
48 if (ret == -1) {
49 return base::ErrStatus("Failed while reading the buffer");
50 }
51 if (ret == 0) {
52 return base::OkStatus();
53 }
54 rpc.SetRpcResponseFunction([](const void* ptr, uint32_t size) {
55 ssize_t ret = base::WriteAll(STDOUT_FILENO, ptr, size);
56 if (ret < 0 || static_cast<uint32_t>(ret) != size) {
57 PERFETTO_FATAL("Failed to write response");
58 }
59 });
60 rpc.OnRpcRequest(buffer, static_cast<size_t>(ret));
61 rpc.SetRpcResponseFunction(nullptr);
62 }
63 }
64
65 } // namespace perfetto::trace_processor
66