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Unified Diff: src/perf-jit.cc

Issue 368433006: Reland "Linux perf tool support update + refactoring." (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Fix Android builder Created 6 years, 6 months ago
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Index: src/perf-jit.cc
diff --git a/src/perf-jit.cc b/src/perf-jit.cc
new file mode 100644
index 0000000000000000000000000000000000000000..4ed36d17e9f79e80dde8c523669e87154f5a2fb1
--- /dev/null
+++ b/src/perf-jit.cc
@@ -0,0 +1,169 @@
+// 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.
+
+#ifdef __linux__
+#include <fcntl.h>
+#include "src/third_party/kernel/tools/perf/util/jitdump.h"
+#endif
+
+#include "src/perf-jit.h"
+
+
+namespace v8 {
+namespace internal {
+
+#ifdef __linux__
+
+const char PerfJitLogger::kFilenameFormatString[] = "perfjit-%d.dump";
+
+// Timestamp module name
+const char PerfJitLogger::kTraceClockDevice[] = "/dev/trace_clock";
+
+// Extra padding for the PID in the filename
+const int PerfJitLogger::kFilenameBufferPadding = 16;
+
+
+static clockid_t get_clockid(int fd) {
+ return ((~(clockid_t) (fd) << 3) | 3);
+}
+
+
+PerfJitLogger::PerfJitLogger()
+ : perf_output_handle_(NULL),
+ code_index_(0) {
+ // 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);
+ clock_fd_ = open(kTraceClockDevice, O_RDONLY);
+ if (clock_fd_ == -1) {
+ FATAL("Could not get perf timestamp clock");
+ }
+ clock_id_ = get_clockid(clock_fd_);
+ if (kClockInvalid == clock_id_) {
+ FATAL("Could not get perf timestamp clock");
+ }
+
+ LogWriteHeader();
+}
+
+
+PerfJitLogger::~PerfJitLogger() {
+ fclose(perf_output_handle_);
+ close(clock_fd_);
jbramley 2014/07/01 12:38:23 This produces an error for me because 'close' isn'
+ perf_output_handle_ = NULL;
+}
+
+
+uint64_t PerfJitLogger::GetTimestamp() {
+ struct timespec ts;
+
+ clock_gettime(clock_id_, &ts);
+ return ((uint64_t) ts.tv_sec * kNsecPerSec) + ts.tv_nsec;
+}
+
+
+void PerfJitLogger::LogRecordedBuffer(Code* code,
+ SharedFunctionInfo*,
+ const char* name,
+ int length) {
+ ASSERT(code->instruction_start() == code->address() + Code::kHeaderSize);
+ ASSERT(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->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_);
+ ASSERT(static_cast<size_t>(size) == rv);
+ USE(rv);
+}
+
+
+void PerfJitLogger::LogWriteHeader() {
+ ASSERT(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 // defined(__linux__)
+
+} } // namespace v8::internal
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