--- /dev/null
+/*
+ * Copyright (C) 2008 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ * 3. Neither the name of Apple Computer, Inc. ("Apple") 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 APPLE AND ITS 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 APPLE OR ITS 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 SamplingTool_h
+#define SamplingTool_h
+
+#include <wtf/Assertions.h>
+#include <wtf/HashMap.h>
+#include <wtf/Threading.h>
+
+#include "Nodes.h"
+#include "Opcode.h"
+
+namespace JSC {
+
+ class CodeBlock;
+ class ExecState;
+ class Interpreter;
+ class ScopeNode;
+ struct Instruction;
+
+ struct ScopeSampleRecord {
+ ScopeSampleRecord(ScopeNode* scope)
+ : m_scope(scope)
+ , m_codeBlock(0)
+ , m_sampleCount(0)
+ , m_opcodeSampleCount(0)
+ , m_samples(0)
+ , m_size(0)
+ {
+ }
+
+ ~ScopeSampleRecord()
+ {
+ if (m_samples)
+ free(m_samples);
+ }
+
+ void sample(CodeBlock*, Instruction*);
+
+ RefPtr<ScopeNode> m_scope;
+ CodeBlock* m_codeBlock;
+ int m_sampleCount;
+ int m_opcodeSampleCount;
+ int* m_samples;
+ unsigned m_size;
+ };
+
+ typedef WTF::HashMap<ScopeNode*, ScopeSampleRecord*> ScopeSampleRecordMap;
+
+ class SamplingTool {
+ public:
+ friend class CallRecord;
+ friend class HostCallRecord;
+
+#if ENABLE(OPCODE_SAMPLING)
+ class CallRecord : Noncopyable {
+ public:
+ CallRecord(SamplingTool* samplingTool)
+ : m_samplingTool(samplingTool)
+ , m_savedSample(samplingTool->m_sample)
+ , m_savedCodeBlock(samplingTool->m_codeBlock)
+ {
+ }
+
+ ~CallRecord()
+ {
+ m_samplingTool->m_sample = m_savedSample;
+ m_samplingTool->m_codeBlock = m_savedCodeBlock;
+ }
+
+ private:
+ SamplingTool* m_samplingTool;
+ intptr_t m_savedSample;
+ CodeBlock* m_savedCodeBlock;
+ };
+
+ class HostCallRecord : public CallRecord {
+ public:
+ HostCallRecord(SamplingTool* samplingTool)
+ : CallRecord(samplingTool)
+ {
+ samplingTool->m_sample |= 0x1;
+ }
+ };
+#else
+ class CallRecord : Noncopyable {
+ public:
+ CallRecord(SamplingTool*)
+ {
+ }
+ };
+
+ class HostCallRecord : public CallRecord {
+ public:
+ HostCallRecord(SamplingTool* samplingTool)
+ : CallRecord(samplingTool)
+ {
+ }
+ };
+#endif
+
+ SamplingTool(Interpreter* interpreter)
+ : m_interpreter(interpreter)
+ , m_running(false)
+ , m_codeBlock(0)
+ , m_sample(0)
+ , m_sampleCount(0)
+ , m_opcodeSampleCount(0)
+ , m_scopeSampleMap(new ScopeSampleRecordMap())
+ {
+ memset(m_opcodeSamples, 0, sizeof(m_opcodeSamples));
+ memset(m_opcodeSamplesInCTIFunctions, 0, sizeof(m_opcodeSamplesInCTIFunctions));
+ }
+
+ ~SamplingTool()
+ {
+ deleteAllValues(*m_scopeSampleMap);
+ }
+
+ void start(unsigned hertz=10000);
+ void stop();
+ void dump(ExecState*);
+
+ void notifyOfScope(ScopeNode* scope);
+
+ void sample(CodeBlock* codeBlock, Instruction* vPC)
+ {
+ ASSERT(!(reinterpret_cast<intptr_t>(vPC) & 0x3));
+ m_codeBlock = codeBlock;
+ m_sample = reinterpret_cast<intptr_t>(vPC);
+ }
+
+ CodeBlock** codeBlockSlot() { return &m_codeBlock; }
+ intptr_t* sampleSlot() { return &m_sample; }
+
+ void* encodeSample(Instruction* vPC, bool inCTIFunction = false, bool inHostFunction = false)
+ {
+ ASSERT(!(reinterpret_cast<intptr_t>(vPC) & 0x3));
+ return reinterpret_cast<void*>(reinterpret_cast<intptr_t>(vPC) | (static_cast<intptr_t>(inCTIFunction) << 1) | static_cast<intptr_t>(inHostFunction));
+ }
+
+ private:
+ class Sample {
+ public:
+ Sample(volatile intptr_t sample, CodeBlock* volatile codeBlock)
+ : m_sample(sample)
+ , m_codeBlock(codeBlock)
+ {
+ }
+
+ bool isNull() { return !m_sample || !m_codeBlock; }
+ CodeBlock* codeBlock() { return m_codeBlock; }
+ Instruction* vPC() { return reinterpret_cast<Instruction*>(m_sample & ~0x3); }
+ bool inHostFunction() { return m_sample & 0x1; }
+ bool inCTIFunction() { return m_sample & 0x2; }
+
+ private:
+ intptr_t m_sample;
+ CodeBlock* m_codeBlock;
+ };
+
+ static void* threadStartFunc(void*);
+ void run();
+
+ Interpreter* m_interpreter;
+
+ // Sampling thread state.
+ bool m_running;
+ unsigned m_hertz;
+ ThreadIdentifier m_samplingThread;
+
+ // State tracked by the main thread, used by the sampling thread.
+ CodeBlock* m_codeBlock;
+ intptr_t m_sample;
+
+ // Gathered sample data.
+ long long m_sampleCount;
+ long long m_opcodeSampleCount;
+ unsigned m_opcodeSamples[numOpcodeIDs];
+ unsigned m_opcodeSamplesInCTIFunctions[numOpcodeIDs];
+
+ Mutex m_scopeSampleMapMutex;
+ OwnPtr<ScopeSampleRecordMap> m_scopeSampleMap;
+ };
+
+} // namespace JSC
+
+#endif // SamplingTool_h
projects / apple / javascriptcore.git / blobdiff