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// Copyright 2016 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.
#ifndef V8_PERF_JIT_H_
#define V8_PERF_JIT_H_
#include "src/log.h"
namespace v8 {
namespace internal {
#if V8_OS_LINUX
// Linux perf tool logging support
class PerfJitLogger : public CodeEventLogger {
public:
PerfJitLogger();
virtual ~PerfJitLogger();
void CodeMoveEvent(AbstractCode* from, Address to) override;
void CodeDisableOptEvent(AbstractCode* code,
SharedFunctionInfo* shared) override {}
private:
void OpenJitDumpFile();
void CloseJitDumpFile();
void* OpenMarkerFile(int fd);
void CloseMarkerFile(void* marker_address);
uint64_t GetTimestamp();
void LogRecordedBuffer(AbstractCode* code, SharedFunctionInfo* shared,
const char* name, int length) override;
// Extension added to V8 log file name to get the low-level log name.
static const char kFilenameFormatString[];
static const int kFilenameBufferPadding;
// File buffer size of the low-level log. We don't use the default to
// minimize the associated overhead.
static const int kLogBufferSize = 2 * MB;
void LogWriteBytes(const char* bytes, int size);
void LogWriteHeader();
void LogWriteDebugInfo(Code* code, SharedFunctionInfo* shared);
static const uint32_t kElfMachIA32 = 3;
static const uint32_t kElfMachX64 = 62;
static const uint32_t kElfMachARM = 40;
static const uint32_t kElfMachMIPS = 10;
uint32_t GetElfMach() {
#if V8_TARGET_ARCH_IA32
return kElfMachIA32;
#elif V8_TARGET_ARCH_X64
return kElfMachX64;
#elif V8_TARGET_ARCH_ARM
return kElfMachARM;
#elif V8_TARGET_ARCH_MIPS
return kElfMachMIPS;
#else
UNIMPLEMENTED();
return 0;
#endif
}
// Per-process singleton file. We assume that there is one main isolate;
// to determine when it goes away, we keep reference count.
static base::LazyRecursiveMutex file_mutex_;
static FILE* perf_output_handle_;
static uint64_t reference_count_;
static void* marker_address_;
static uint64_t code_index_;
};
#else
// PerfJitLogger is only implemented on Linux
class PerfJitLogger : public CodeEventLogger {
public:
void CodeMoveEvent(AbstractCode* from, Address to) override {
UNIMPLEMENTED();
}
void CodeDisableOptEvent(AbstractCode* code,
SharedFunctionInfo* shared) override {
UNIMPLEMENTED();
}
void LogRecordedBuffer(AbstractCode* code, SharedFunctionInfo* shared,
const char* name, int length) override {
UNIMPLEMENTED();
}
};
#endif // V8_OS_LINUX
} // namespace internal
} // namespace v8
#endif
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