1 files changed, 95 insertions, 0 deletions
diff --git a/js/src/jit/PerfSpewer.h b/js/src/jit/PerfSpewer.h
new file mode 100644
index 000000000..4fd449746
--- /dev/null
+++ b/js/src/jit/PerfSpewer.h
@@ -0,0 +1,95 @@
+/* -*- 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/MacroAssembler.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 MOZ_MUST_USE bool startBasicBlock(MBasicBlock* blk, MacroAssembler& masm);
+    virtual MOZ_MUST_USE bool endBasicBlock(MacroAssembler& masm);
+    MOZ_MUST_USE 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);
+
+// wasm doesn't support block annotations.
+class WasmPerfSpewer : public PerfSpewer
+{
+  public:
+    MOZ_MUST_USE bool startBasicBlock(MBasicBlock* blk, MacroAssembler& masm) { return true; }
+    MOZ_MUST_USE bool endBasicBlock(MacroAssembler& masm) { return true; }
+};
+
+void writePerfSpewerWasmFunctionMap(uintptr_t base, uintptr_t size, const char* filename,
+                                    unsigned lineno, unsigned colIndex, const char* funcName);
+
+#endif // JS_ION_PERF
+
+} // namespace jit
+} // namespace js
+
+#endif /* jit_PerfSpewer_h */