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1 // Copyright 2014 the V8 project authors. All rights reserved. | |
2 // Redistribution and use in source and binary forms, with or without | |
3 // modification, are permitted provided that the following conditions are | |
4 // met: | |
5 // | |
6 // * Redistributions of source code must retain the above copyright | |
7 // notice, this list of conditions and the following disclaimer. | |
8 // * Redistributions in binary form must reproduce the above | |
9 // copyright notice, this list of conditions and the following | |
10 // disclaimer in the documentation and/or other materials provided | |
11 // with the distribution. | |
12 // * Neither the name of Google Inc. nor the names of its | |
13 // contributors may be used to endorse or promote products derived | |
14 // from this software without specific prior written permission. | |
15 // | |
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
27 | |
28 #ifdef __linux__ | |
29 #include <fcntl.h> | |
30 #include "src/third_party/kernel/tools/perf/util/jitdump.h" | |
31 #endif | |
32 | |
33 #include "src/perf-jit.h" | |
34 | |
35 | |
36 namespace v8 { | |
37 namespace internal { | |
38 | |
39 #ifdef __linux__ | |
40 | |
41 const char PerfJitLogger::kFilenameFormatString[] = "perfjit-%d.dump"; | |
42 | |
43 // Timestamp module name | |
44 const char PerfJitLogger::kTraceClockDevice[] = "/dev/trace_clock"; | |
45 | |
46 // Extra padding for the PID in the filename | |
47 const int PerfJitLogger::kFilenameBufferPadding = 16; | |
48 | |
49 | |
50 static clockid_t get_clockid(int fd) { | |
51 return ((~(clockid_t) (fd) << 3) | 3); | |
52 } | |
53 | |
54 | |
55 PerfJitLogger::PerfJitLogger() | |
56 : perf_output_handle_(NULL), | |
57 code_index_(0) { | |
58 // Open the perf JIT dump file. | |
59 int bufferSize = sizeof(kFilenameFormatString) + kFilenameBufferPadding; | |
60 ScopedVector<char> perf_dump_name(bufferSize); | |
61 int size = SNPrintF( | |
62 perf_dump_name, | |
63 kFilenameFormatString, | |
64 base::OS::GetCurrentProcessId()); | |
65 CHECK_NE(size, -1); | |
66 perf_output_handle_ = base::OS::FOpen(perf_dump_name.start(), | |
67 base::OS::LogFileOpenMode); | |
68 CHECK_NE(perf_output_handle_, NULL); | |
69 setvbuf(perf_output_handle_, NULL, _IOFBF, kLogBufferSize); | |
70 clock_fd_ = open(kTraceClockDevice, O_RDONLY); | |
71 if (clock_fd_ == -1) { | |
72 FATAL("Could not get perf timestamp clock"); | |
73 } | |
74 clock_id_ = get_clockid(clock_fd_); | |
75 if (kClockInvalid == clock_id_) { | |
76 FATAL("Could not get perf timestamp clock"); | |
77 } | |
78 | |
79 LogWriteHeader(); | |
80 } | |
81 | |
82 | |
83 PerfJitLogger::~PerfJitLogger() { | |
84 fclose(perf_output_handle_); | |
85 close(clock_fd_); | |
86 perf_output_handle_ = NULL; | |
87 } | |
88 | |
89 | |
90 uint64_t PerfJitLogger::GetTimestamp() { | |
91 struct timespec ts; | |
92 | |
93 clock_gettime(clock_id_, &ts); | |
94 return ((uint64_t) ts.tv_sec * kNsecPerSec) + ts.tv_nsec; | |
95 } | |
96 | |
97 | |
98 void PerfJitLogger::LogRecordedBuffer(Code* code, | |
99 SharedFunctionInfo*, | |
100 const char* name, | |
101 int length) { | |
102 ASSERT(code->instruction_start() == code->address() + Code::kHeaderSize); | |
103 ASSERT(perf_output_handle_ != NULL); | |
104 | |
105 const char* code_name = name; | |
106 uint8_t* code_pointer = reinterpret_cast<uint8_t*>(code->instruction_start()); | |
107 uint32_t code_size = code->instruction_size(); | |
108 | |
109 static const char string_terminator[] = "\0"; | |
110 | |
111 jr_code_load code_load; | |
112 code_load.p.id = JIT_CODE_LOAD; | |
113 code_load.p.total_size = sizeof(code_load) + length + 1 + code_size; | |
114 code_load.p.timestamp = GetTimestamp(); | |
115 code_load.pid = static_cast<uint32_t>(base::OS::GetCurrentProcessId()); | |
116 code_load.tid = static_cast<uint32_t>(base::OS::GetCurrentThreadId()); | |
117 code_load.vma = 0x0; // Our addresses are absolute. | |
118 code_load.code_addr = reinterpret_cast<uint64_t>(code_pointer); | |
119 code_load.code_size = code_size; | |
120 code_load.code_index = code_index_; | |
121 | |
122 code_index_++; | |
123 | |
124 LogWriteBytes(reinterpret_cast<const char*>(&code_load), sizeof(code_load)); | |
125 LogWriteBytes(code_name, length); | |
126 LogWriteBytes(string_terminator, 1); | |
127 LogWriteBytes(reinterpret_cast<const char*>(code_pointer), code_size); | |
128 } | |
129 | |
130 | |
131 void PerfJitLogger::CodeMoveEvent(Address from, Address to) { | |
132 // Code relocation not supported. | |
133 UNREACHABLE(); | |
134 } | |
135 | |
136 | |
137 void PerfJitLogger::CodeDeleteEvent(Address from) { | |
138 // V8 does not send notification on code unload | |
139 } | |
140 | |
141 | |
142 void PerfJitLogger::SnapshotPositionEvent(Address addr, int pos) { | |
143 } | |
144 | |
145 | |
146 void PerfJitLogger::LogWriteBytes(const char* bytes, int size) { | |
147 size_t rv = fwrite(bytes, 1, size, perf_output_handle_); | |
148 ASSERT(static_cast<size_t>(size) == rv); | |
149 USE(rv); | |
150 } | |
151 | |
152 | |
153 void PerfJitLogger::LogWriteHeader() { | |
154 ASSERT(perf_output_handle_ != NULL); | |
155 jitheader header; | |
156 header.magic = JITHEADER_MAGIC; | |
157 header.version = JITHEADER_VERSION; | |
158 header.total_size = sizeof(jitheader); | |
159 header.pad1 = 0xdeadbeef; | |
160 header.elf_mach = GetElfMach(); | |
161 header.pid = base::OS::GetCurrentProcessId(); | |
162 header.timestamp = | |
163 static_cast<uint64_t>(base::OS::TimeCurrentMillis() * 1000.0); | |
164 LogWriteBytes(reinterpret_cast<const char*>(&header), sizeof(header)); | |
165 } | |
166 | |
167 #endif // defined(__linux__) | |
168 | |
169 } } // namespace v8::internal | |
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