| // Copyright 2014 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "src/perf-jit.h" |
| |
| #if V8_OS_LINUX |
| #include <fcntl.h> |
| #include <unistd.h> |
| #include "src/third_party/kernel/tools/perf/util/jitdump.h" |
| #endif // V8_OS_LINUX |
| |
| namespace v8 { |
| namespace internal { |
| |
| #if V8_OS_LINUX |
| |
| const char PerfJitLogger::kFilenameFormatString[] = "perfjit-%d.dump"; |
| |
| // Extra padding for the PID in the filename |
| const int PerfJitLogger::kFilenameBufferPadding = 16; |
| |
| |
| PerfJitLogger::PerfJitLogger() : perf_output_handle_(NULL), code_index_(0) { |
| if (!base::TimeTicks::KernelTimestampAvailable()) { |
| FATAL("Cannot profile with perf JIT - kernel timestamps not available."); |
| } |
| |
| // Open the perf JIT dump file. |
| int bufferSize = sizeof(kFilenameFormatString) + kFilenameBufferPadding; |
| ScopedVector<char> perf_dump_name(bufferSize); |
| int size = SNPrintF(perf_dump_name, kFilenameFormatString, |
| base::OS::GetCurrentProcessId()); |
| CHECK_NE(size, -1); |
| perf_output_handle_ = |
| base::OS::FOpen(perf_dump_name.start(), base::OS::LogFileOpenMode); |
| CHECK_NE(perf_output_handle_, NULL); |
| setvbuf(perf_output_handle_, NULL, _IOFBF, kLogBufferSize); |
| |
| LogWriteHeader(); |
| } |
| |
| |
| PerfJitLogger::~PerfJitLogger() { |
| fclose(perf_output_handle_); |
| perf_output_handle_ = NULL; |
| } |
| |
| |
| uint64_t PerfJitLogger::GetTimestamp() { |
| return static_cast<int64_t>( |
| base::TimeTicks::KernelTimestampNow().ToInternalValue()); |
| } |
| |
| |
| void PerfJitLogger::LogRecordedBuffer(Code* code, SharedFunctionInfo*, |
| const char* name, int length) { |
| DCHECK(code->instruction_start() == code->address() + Code::kHeaderSize); |
| DCHECK(perf_output_handle_ != NULL); |
| |
| const char* code_name = name; |
| uint8_t* code_pointer = reinterpret_cast<uint8_t*>(code->instruction_start()); |
| uint32_t code_size = code->is_crankshafted() ? code->safepoint_table_offset() |
| : code->instruction_size(); |
| |
| static const char string_terminator[] = "\0"; |
| |
| jr_code_load code_load; |
| code_load.p.id = JIT_CODE_LOAD; |
| code_load.p.total_size = sizeof(code_load) + length + 1 + code_size; |
| code_load.p.timestamp = GetTimestamp(); |
| code_load.pid = static_cast<uint32_t>(base::OS::GetCurrentProcessId()); |
| code_load.tid = static_cast<uint32_t>(base::OS::GetCurrentThreadId()); |
| code_load.vma = 0x0; // Our addresses are absolute. |
| code_load.code_addr = reinterpret_cast<uint64_t>(code_pointer); |
| code_load.code_size = code_size; |
| code_load.code_index = code_index_; |
| |
| code_index_++; |
| |
| LogWriteBytes(reinterpret_cast<const char*>(&code_load), sizeof(code_load)); |
| LogWriteBytes(code_name, length); |
| LogWriteBytes(string_terminator, 1); |
| LogWriteBytes(reinterpret_cast<const char*>(code_pointer), code_size); |
| } |
| |
| |
| void PerfJitLogger::CodeMoveEvent(Address from, Address to) { |
| // Code relocation not supported. |
| UNREACHABLE(); |
| } |
| |
| |
| void PerfJitLogger::CodeDeleteEvent(Address from) { |
| // V8 does not send notification on code unload |
| } |
| |
| |
| void PerfJitLogger::SnapshotPositionEvent(Address addr, int pos) {} |
| |
| |
| void PerfJitLogger::LogWriteBytes(const char* bytes, int size) { |
| size_t rv = fwrite(bytes, 1, size, perf_output_handle_); |
| DCHECK(static_cast<size_t>(size) == rv); |
| USE(rv); |
| } |
| |
| |
| void PerfJitLogger::LogWriteHeader() { |
| DCHECK(perf_output_handle_ != NULL); |
| jitheader header; |
| header.magic = JITHEADER_MAGIC; |
| header.version = JITHEADER_VERSION; |
| header.total_size = sizeof(jitheader); |
| header.pad1 = 0xdeadbeef; |
| header.elf_mach = GetElfMach(); |
| header.pid = base::OS::GetCurrentProcessId(); |
| header.timestamp = |
| static_cast<uint64_t>(base::OS::TimeCurrentMillis() * 1000.0); |
| LogWriteBytes(reinterpret_cast<const char*>(&header), sizeof(header)); |
| } |
| |
| #endif // V8_OS_LINUX |
| } |
| } // namespace v8::internal |