1 /*
2 * Copyright (C) 2019 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/read_trace_internal.h"
18
19 #include "perfetto/base/logging.h"
20 #include "perfetto/ext/base/file_utils.h"
21 #include "perfetto/ext/base/scoped_file.h"
22 #include "perfetto/ext/base/utils.h"
23 #include "perfetto/protozero/proto_utils.h"
24 #include "perfetto/trace_processor/trace_processor.h"
25
26 #include "perfetto/trace_processor/trace_blob.h"
27 #include "perfetto/trace_processor/trace_blob_view.h"
28 #include "src/trace_processor/forwarding_trace_parser.h"
29 #include "src/trace_processor/importers/gzip/gzip_trace_parser.h"
30 #include "src/trace_processor/importers/proto/proto_trace_tokenizer.h"
31 #include "src/trace_processor/util/gzip_utils.h"
32 #include "src/trace_processor/util/status_macros.h"
33
34 #include "protos/perfetto/trace/trace.pbzero.h"
35 #include "protos/perfetto/trace/trace_packet.pbzero.h"
36
37 #if TRACE_PROCESSOR_HAS_MMAP()
38 #include <stdlib.h>
39 #include <sys/mman.h>
40 #include <unistd.h>
41 #endif
42 namespace perfetto {
43 namespace trace_processor {
44 namespace {
45
46 // 1MB chunk size seems the best tradeoff on a MacBook Pro 2013 - i7 2.8 GHz.
47 constexpr size_t kChunkSize = 1024 * 1024;
48
ReadTraceUsingRead(TraceProcessor * tp,int fd,uint64_t * file_size,const std::function<void (uint64_t parsed_size)> & progress_callback)49 util::Status ReadTraceUsingRead(
50 TraceProcessor* tp,
51 int fd,
52 uint64_t* file_size,
53 const std::function<void(uint64_t parsed_size)>& progress_callback) {
54 // Load the trace in chunks using ordinary read().
55 for (int i = 0;; i++) {
56 if (progress_callback && i % 128 == 0)
57 progress_callback(*file_size);
58
59 TraceBlob blob = TraceBlob::Allocate(kChunkSize);
60 auto rsize = base::Read(fd, blob.data(), blob.size());
61 if (rsize == 0)
62 break;
63
64 if (rsize < 0) {
65 return util::ErrStatus("Reading trace file failed (errno: %d, %s)", errno,
66 strerror(errno));
67 }
68
69 *file_size += static_cast<uint64_t>(rsize);
70 TraceBlobView blob_view(std::move(blob), 0, static_cast<size_t>(rsize));
71 RETURN_IF_ERROR(tp->Parse(std::move(blob_view)));
72 }
73 return util::OkStatus();
74 }
75 } // namespace
76
ReadTraceUnfinalized(TraceProcessor * tp,const char * filename,const std::function<void (uint64_t parsed_size)> & progress_callback)77 util::Status ReadTraceUnfinalized(
78 TraceProcessor* tp,
79 const char* filename,
80 const std::function<void(uint64_t parsed_size)>& progress_callback) {
81 base::ScopedFile fd(base::OpenFile(filename, O_RDONLY));
82 if (!fd)
83 return util::ErrStatus("Could not open trace file (path: %s)", filename);
84
85 uint64_t bytes_read = 0;
86
87 #if TRACE_PROCESSOR_HAS_MMAP()
88 char* no_mmap = getenv("TRACE_PROCESSOR_NO_MMAP");
89 uint64_t whole_size_64 = static_cast<uint64_t>(lseek(*fd, 0, SEEK_END));
90 lseek(*fd, 0, SEEK_SET);
91 bool use_mmap = !no_mmap || *no_mmap != '1';
92 if (sizeof(size_t) < 8 && whole_size_64 > 2147483648ULL)
93 use_mmap = false; // Cannot use mmap on 32-bit systems for files > 2GB.
94
95 if (use_mmap) {
96 const size_t whole_size = static_cast<size_t>(whole_size_64);
97 void* file_mm = mmap(nullptr, whole_size, PROT_READ, MAP_PRIVATE, *fd, 0);
98 if (file_mm != MAP_FAILED) {
99 TraceBlobView whole_mmap(TraceBlob::FromMmap(file_mm, whole_size));
100 // Parse the file in chunks so we get some status update on stdio.
101 static constexpr size_t kMmapChunkSize = 128ul * 1024 * 1024;
102 while (bytes_read < whole_size_64) {
103 progress_callback(bytes_read);
104 const size_t bytes_read_z = static_cast<size_t>(bytes_read);
105 size_t slice_size = std::min(whole_size - bytes_read_z, kMmapChunkSize);
106 TraceBlobView slice = whole_mmap.slice_off(bytes_read_z, slice_size);
107 RETURN_IF_ERROR(tp->Parse(std::move(slice)));
108 bytes_read += slice_size;
109 } // while (slices)
110 } // if (!MAP_FAILED)
111 } // if (use_mmap)
112 if (bytes_read == 0)
113 PERFETTO_LOG("Cannot use mmap on this system. Falling back on read()");
114 #endif // TRACE_PROCESSOR_HAS_MMAP()
115 if (bytes_read == 0) {
116 RETURN_IF_ERROR(
117 ReadTraceUsingRead(tp, *fd, &bytes_read, progress_callback));
118 }
119 tp->SetCurrentTraceName(filename);
120
121 if (progress_callback)
122 progress_callback(bytes_read);
123 return util::OkStatus();
124 }
125 } // namespace trace_processor
126 } // namespace perfetto
127