diff -r 000000000000 -r 6474c204b198 js/src/jit/PerfSpewer.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit/PerfSpewer.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,103 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sts=4 et sw=4 tw=99:
+ * 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_PerfSpewer_h
+#define jit_PerfSpewer_h
+
+#ifdef JS_ION_PERF
+# include <stdio.h>
+# include "jit/IonMacroAssembler.h"
+#endif
+
+namespace js {
+namespace jit {
+
+class MBasicBlock;
+class MacroAssembler;
+
+#ifdef JS_ION_PERF
+void CheckPerf();
+bool PerfBlockEnabled();
+bool PerfFuncEnabled();
+static inline bool PerfEnabled() {
+    return PerfBlockEnabled() || PerfFuncEnabled();
+}
+#else
+static inline void CheckPerf() {}
+static inline bool PerfBlockEnabled() { return false; }
+static inline bool PerfFuncEnabled() { return false; }
+static inline bool PerfEnabled() { return false; }
+#endif
+
+#ifdef JS_ION_PERF
+
+struct Record {
+    const char *filename;
+    unsigned lineNumber;
+    unsigned columnNumber;
+    uint32_t id;
+    Label start, end;
+    size_t startOffset, endOffset;
+
+    Record(const char *filename,
+           unsigned lineNumber,
+           unsigned columnNumber,
+           uint32_t id)
+      : filename(filename), lineNumber(lineNumber),
+        columnNumber(columnNumber), id(id),
+        startOffset(0u), endOffset(0u)
+    {}
+};
+
+typedef Vector<Record, 1, SystemAllocPolicy> BasicBlocksVector;
+
+class PerfSpewer
+{
+  protected:
+    static uint32_t nextFunctionIndex;
+
+  public:
+    Label endInlineCode;
+
+  protected:
+    BasicBlocksVector basicBlocks_;
+
+  public:
+    virtual bool startBasicBlock(MBasicBlock *blk, MacroAssembler &masm);
+    bool endBasicBlock(MacroAssembler &masm);
+    bool noteEndInlineCode(MacroAssembler &masm);
+
+    void writeProfile(JSScript *script, JitCode *code, MacroAssembler &masm);
+};
+
+void writePerfSpewerBaselineProfile(JSScript *script, JitCode *code);
+void writePerfSpewerJitCodeProfile(JitCode *code, const char *msg);
+
+class AsmJSPerfSpewer : public PerfSpewer
+{
+  public:
+    bool startBasicBlock(MBasicBlock *blk, MacroAssembler &masm);
+
+    void noteBlocksOffsets();
+    BasicBlocksVector &basicBlocks() { return basicBlocks_; }
+};
+
+void writePerfSpewerAsmJSFunctionMap(uintptr_t base, uintptr_t size, const char *filename,
+                                     unsigned lineno, unsigned colIndex, const char *funcName);
+
+void writePerfSpewerAsmJSBlocksMap(uintptr_t baseAddress, size_t funcStartOffset,
+                                   size_t funcStartOOLOffset, size_t funcSize,
+                                   const char *filename, const char *funcName,
+                                   const BasicBlocksVector &basicBlocks);
+
+void writePerfSpewerAsmJSEntriesAndExits(uintptr_t base, size_t size);
+
+#endif // JS_ION_PERF
+
+} // namespace jit
+} // namespace js
+
+#endif /* jit_PerfSpewer_h */