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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef jit_CacheIRSpewer_h
#define jit_CacheIRSpewer_h
#ifdef JS_CACHEIR_SPEW
# include "mozilla/Maybe.h"
# include "jit/CacheIR.h"
# include "jit/CacheIRGenerator.h"
# include "jit/CacheIRReader.h"
# include "jit/CacheIRWriter.h"
# include "js/TypeDecls.h"
# include "threading/LockGuard.h"
# include "vm/JSONPrinter.h"
# include "vm/MutexIDs.h"
namespace js {
namespace jit {
class CacheIRSpewer {
Mutex outputLock_ MOZ_UNANNOTATED;
Fprinter output_;
mozilla::Maybe<JSONPrinter> json_;
static CacheIRSpewer cacheIRspewer;
// Counter to record how many times Guard class is called. This is used to
// determine when to flush outputs based on the given interval value.
// For example, if |spewInterval_ = 2|, outputs will be flushed on
// guardCount_ values 0,2,4,6,...
uint32_t guardCount_;
// Interval at which to flush output files. This value can be set with the
// environment variable |CACHEIR_LOG_FLUSH|.
uint32_t spewInterval_;
CacheIRSpewer();
~CacheIRSpewer();
bool enabled() { return json_.isSome(); }
// These methods can only be called when enabled() is true.
Mutex& lock() {
MOZ_ASSERT(enabled());
return outputLock_;
}
void beginCache(const IRGenerator& generator);
void valueProperty(const char* name, const Value& v);
void opcodeProperty(const char* name, const JSOp op);
void cacheIRSequence(CacheIRReader& reader);
void attached(const char* name);
void endCache();
public:
static CacheIRSpewer& singleton() { return cacheIRspewer; }
bool init(const char* name);
class MOZ_RAII Guard {
CacheIRSpewer& sp_;
const IRGenerator& gen_;
const char* name_;
public:
Guard(const IRGenerator& gen, const char* name)
: sp_(CacheIRSpewer::singleton()), gen_(gen), name_(name) {
if (sp_.enabled()) {
sp_.lock().lock();
sp_.beginCache(gen_);
}
}
~Guard() {
if (sp_.enabled()) {
const CacheIRWriter& writer = gen_.writerRef();
if (!writer.failed() && writer.codeLength() > 0) {
CacheIRReader reader(writer);
sp_.cacheIRSequence(reader);
}
if (name_ != nullptr) {
sp_.attached(name_);
}
sp_.endCache();
if (sp_.guardCount_++ % sp_.spewInterval_ == 0) {
sp_.output_.flush();
}
sp_.lock().unlock();
}
}
void valueProperty(const char* name, const Value& v) const {
sp_.valueProperty(name, v);
}
void opcodeProperty(const char* name, const JSOp op) const {
sp_.opcodeProperty(name, op);
}
explicit operator bool() const { return sp_.enabled(); }
};
};
extern void SpewCacheIROps(GenericPrinter& out, const char* prefix,
const CacheIRStubInfo* info);
} // namespace jit
} // namespace js
#endif /* JS_CACHEIR_SPEW */
#endif /* jit_CacheIRSpewer_h */
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