Line data Source code
1 : // Copyright 2016 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 : #ifndef V8_PERF_JIT_H_
29 : #define V8_PERF_JIT_H_
30 :
31 : #include "src/log.h"
32 :
33 : namespace v8 {
34 : namespace internal {
35 :
36 : #if V8_OS_LINUX
37 :
38 : // Linux perf tool logging support
39 : class PerfJitLogger : public CodeEventLogger {
40 : public:
41 : explicit PerfJitLogger(Isolate* isolate);
42 : ~PerfJitLogger() override;
43 :
44 : void CodeMoveEvent(AbstractCode from, AbstractCode to) override;
45 0 : void CodeDisableOptEvent(AbstractCode code,
46 0 : SharedFunctionInfo shared) override {}
47 :
48 : private:
49 : void OpenJitDumpFile();
50 : void CloseJitDumpFile();
51 : void* OpenMarkerFile(int fd);
52 : void CloseMarkerFile(void* marker_address);
53 :
54 : uint64_t GetTimestamp();
55 : void LogRecordedBuffer(AbstractCode code, SharedFunctionInfo shared,
56 : const char* name, int length) override;
57 : void LogRecordedBuffer(const wasm::WasmCode* code, const char* name,
58 : int length) override;
59 :
60 : // Extension added to V8 log file name to get the low-level log name.
61 : static const char kFilenameFormatString[];
62 : static const int kFilenameBufferPadding;
63 :
64 : // File buffer size of the low-level log. We don't use the default to
65 : // minimize the associated overhead.
66 : static const int kLogBufferSize = 2 * MB;
67 :
68 : void WriteJitCodeLoadEntry(const uint8_t* code_pointer, uint32_t code_size,
69 : const char* name, int name_length);
70 :
71 : void LogWriteBytes(const char* bytes, int size);
72 : void LogWriteHeader();
73 : void LogWriteDebugInfo(Code code, SharedFunctionInfo shared);
74 : void LogWriteUnwindingInfo(Code code);
75 :
76 : static const uint32_t kElfMachIA32 = 3;
77 : static const uint32_t kElfMachX64 = 62;
78 : static const uint32_t kElfMachARM = 40;
79 : static const uint32_t kElfMachMIPS = 10;
80 : static const uint32_t kElfMachARM64 = 183;
81 :
82 : uint32_t GetElfMach() {
83 : #if V8_TARGET_ARCH_IA32
84 : return kElfMachIA32;
85 : #elif V8_TARGET_ARCH_X64
86 : return kElfMachX64;
87 : #elif V8_TARGET_ARCH_ARM
88 : return kElfMachARM;
89 : #elif V8_TARGET_ARCH_MIPS
90 : return kElfMachMIPS;
91 : #elif V8_TARGET_ARCH_ARM64
92 : return kElfMachARM64;
93 : #else
94 : UNIMPLEMENTED();
95 : return 0;
96 : #endif
97 : }
98 :
99 : #if V8_TARGET_ARCH_32_BIT
100 : static const int kElfHeaderSize = 0x34;
101 : #elif V8_TARGET_ARCH_64_BIT
102 : static const int kElfHeaderSize = 0x40;
103 : #else
104 : #error Unknown target architecture pointer size
105 : #endif
106 :
107 : // Per-process singleton file. We assume that there is one main isolate;
108 : // to determine when it goes away, we keep reference count.
109 : static base::LazyRecursiveMutex file_mutex_;
110 : static FILE* perf_output_handle_;
111 : static uint64_t reference_count_;
112 : static void* marker_address_;
113 : static uint64_t code_index_;
114 : };
115 :
116 : #else
117 :
118 : // PerfJitLogger is only implemented on Linux
119 : class PerfJitLogger : public CodeEventLogger {
120 : public:
121 : explicit PerfJitLogger(Isolate* isolate) : CodeEventLogger(isolate) {}
122 :
123 : void CodeMoveEvent(AbstractCode from, AbstractCode to) override {
124 : UNIMPLEMENTED();
125 : }
126 :
127 : void CodeDisableOptEvent(AbstractCode code,
128 : SharedFunctionInfo shared) override {
129 : UNIMPLEMENTED();
130 : }
131 :
132 : void LogRecordedBuffer(AbstractCode code, SharedFunctionInfo shared,
133 : const char* name, int length) override {
134 : UNIMPLEMENTED();
135 : }
136 :
137 : void LogRecordedBuffer(const wasm::WasmCode* code, const char* name,
138 : int length) override {
139 : UNIMPLEMENTED();
140 : }
141 : };
142 :
143 : #endif // V8_OS_LINUX
144 : } // namespace internal
145 : } // namespace v8
146 :
147 : #endif // V8_PERF_JIT_H_
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