JavaScriptCore-1218.tar.gz

[apple/javascriptcore.git] / disassembler / UDis86Disassembler.cpp

diff --git a/disassembler/UDis86Disassembler.cpp b/disassembler/UDis86Disassembler.cpp
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+++ b/disassembler/UDis86Disassembler.cpp
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+/*
+ * Copyright (C) 2012 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 INC. 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. 
+ */
+
+#include "config.h"
+#include "Disassembler.h"
+
+#if USE(UDIS86)
+
+#include "MacroAssemblerCodeRef.h"
+#include "udis86.h"
+
+namespace JSC {
+
+bool tryToDisassemble(const MacroAssemblerCodePtr& codePtr, size_t size, const char* prefix, PrintStream& out)
+{
+    ud_t disassembler;
+    ud_init(&disassembler);
+    ud_set_input_buffer(&disassembler, static_cast<unsigned char*>(codePtr.executableAddress()), size);
+#if CPU(X86_64)
+    ud_set_mode(&disassembler, 64);
+#else
+    ud_set_mode(&disassembler, 32);
+#endif
+    ud_set_pc(&disassembler, bitwise_cast<uintptr_t>(codePtr.executableAddress()));
+    ud_set_syntax(&disassembler, UD_SYN_ATT);
+    
+    uint64_t currentPC = disassembler.pc;
+    while (ud_disassemble(&disassembler)) {
+        char pcString[20];
+        snprintf(pcString, sizeof(pcString), "0x%lx", static_cast<unsigned long>(currentPC));
+        out.printf("%s%16s: %s\n", prefix, pcString, ud_insn_asm(&disassembler));
+        currentPC = disassembler.pc;
+    }
+    
+    return true;
+}
+
+} // namespace JSC
+
+#endif // USE(UDIS86)
+