agent/src/share/classes/sun/jvm/hotspot/asm/Disassembler.java
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*** old/agent/src/share/classes/sun/jvm/hotspot/asm/Disassembler.java	Wed Aug 26 18:19:58 2009
--- new/agent/src/share/classes/sun/jvm/hotspot/asm/Disassembler.java	Wed Aug 26 18:19:58 2009

*** 22,45 **** --- 22,345 ---- * */ package sun.jvm.hotspot.asm; public abstract class Disassembler { + import java.io.PrintStream; + import java.util.Observer; + import java.util.Observable; + import sun.jvm.hotspot.code.CodeBlob; + import sun.jvm.hotspot.code.NMethod; + import sun.jvm.hotspot.debugger.Address; + import sun.jvm.hotspot.runtime.VM; + + public class Disassembler { + static final int COMMENT_COLUMN = 40; + static final String BYTES_COMMENT = ";..."; /* funky byte display comment */ + + private static String libname; + private static String options; + private static long decode_function; + private static int instructionAlignment; + + static { + VM.registerVMInitializedObserver(new Observer() { + public void update(Observable o, Object data) { + options = ""; + instructionAlignment = 1; + libname = null; + String cpu = VM.getVM().getCPU(); + if (cpu.equals("sparc")) { + libname = "hsdis-sparc"; + instructionAlignment = 4; + if (VM.getVM().isLP64()) { + options = "v9only"; + } + } else if (cpu.equals("x86")) { + libname = "hsdis-i386"; + } else if (cpu.equals("amd64")) { + libname = "hsdis-amd64"; + } else if (cpu.equals("ia64")) { + libname = "hsdis-ia64"; + } + } + }); + } + protected long startPc; protected byte[] code; + private String _option_buf = ""; + private boolean _print_pc; + private long _cur_insn; + private int _bytes_per_line; // arch-specific formatting option + private CodeBlob blob; + private NMethod nmethod; + private int instruction_alignment; ! public Disassembler(long startPc, byte[] code) { ! public static void decode(InstructionVisitor visitor, CodeBlob blob) { + decode(visitor, blob, blob.instructionsBegin(), blob.instructionsEnd()); + } + + public static void decode(InstructionVisitor visitor, CodeBlob blob, Address begin, Address end) { + int codeSize = (int)end.minus(begin); + long startPc = addressToLong(begin); + byte[] code = new byte[codeSize]; + for (int i = 0; i < code.length; i++) + code[i] = begin.getJByteAt(i); + Disassembler dis = new Disassembler(startPc, code); + dis.decode(visitor); + } + + private Disassembler(long startPc, byte[] code) { this.startPc = startPc; this.code = code; + + // Lazily load hsdis + if (decode_function == 0) { + decode_function = load_library(libname); + if (decode_function == 0) { + throw new InternalError("Can't open " + libname); } + } + } public long getStartPC() { return startPc; } public byte[] getCode() { return code; } ! public abstract void decode(InstructionVisitor visitor); ! private static native long load_library(String hsdis_library_name); + + private native void decode(InstructionVisitor visitor, long pc, byte[] code, + String options, long decode_function); + + private void decode(InstructionVisitor visitor) { + visitor.prologue(); + decode(visitor, startPc, code, options, decode_function); + visitor.epilogue(); + } + + private boolean match(String event, String tag) { + if (!event.startsWith(tag)) + return false; + int taglen = tag.length(); + if (taglen == event.length()) return true; + char delim = event.charAt(taglen); + return delim == ' ' || delim == '/' || delim == '='; + } + + private long handle_event(InstructionVisitor visitor, String event, long arg) { + if (match(event, "insn")) { + start_insn(visitor, arg); + } else if (match(event, "/insn")) { + end_insn(visitor, arg); + } else if (match(event, "addr")) { + if (arg != 0) { + print_address(visitor, arg); + return arg; + } + } else if (match(event, "mach")) { + // output().printf("[Disassembling for mach='%s']\n", arg); + } else if (match(event, "format bytes-per-line")) { + _bytes_per_line = (int)arg; + } else { + // ignore unrecognized markup + } + return 0; + } + + void start_insn(InstructionVisitor visitor, long pc) { + _cur_insn = pc; + print_insn_labels(visitor); + visitor.beginInstruction(pc); + } + + void end_insn(InstructionVisitor visitor, long pc) { + long pc0 = _cur_insn; + if (nmethod != null) + print_code_comment_on(visitor, COMMENT_COLUMN, pc0, pc); + visitor.endInstruction(pc); + } + + long cur_insn() { return _cur_insn; } + + protected static long addressToLong(sun.jvm.hotspot.debugger.Address addr) { + return VM.getVM().getDebugger().getAddressValue(addr); + } + + void print_insn_labels(InstructionVisitor visitor) { + long p = cur_insn(); + if (nmethod != null) { + if (p == addressToLong(nmethod.getEntryPoint())) visitor.print("[Entry Point]\n"); + if (p == addressToLong(nmethod.getVerifiedEntryPoint())) visitor.print("[Verified Entry Point]\n"); + if (p == addressToLong(nmethod.exceptionBegin())) visitor.print("[Exception Handler]\n"); + if (p == addressToLong(nmethod.stubBegin())) visitor.print("[Stub Code]\n"); + // if (p == addressToLong(nmethod.getConstsBegin())) visitor.print("[Constants]\n"); + } + CodeBlob cb = blob; + // if (cb != null) { + // cb.print_block_comment(st, (long)(p - addressToLong(cb.instructionsBegin()))); + // } + if (_print_pc) { + visitor.print(" " + p + ": "); + } + } + + public void raw_print(InstructionVisitor visitor, String s) { + visitor.print(s); + } + + public void print_address(InstructionVisitor visitor, long adr) { + if (adr == 0) { + visitor.print("NULL"); + return; + } + + int small_num = (int)adr; + if (adr == small_num && -1 <= small_num && small_num <= 9) { + visitor.print(Integer.toString(small_num)); + return; + } + + + // if (StubRoutines::contains(adr)) { + // StubCodeDesc* desc = StubCodeDesc::desc_for(adr); + // if (desc == null) + // desc = StubCodeDesc::desc_for(adr + frame::pc_return_offset); + // if (desc != null) { + // visitor.print("Stub::%s", desc.name()); + // if (desc.begin() != adr) + // visitor.print("%+d 0x%p",adr - desc.begin(), adr); + // else if (WizardMode) visitor.print(" " INTPTR_FORMAT, adr); + // return; + // } + // visitor.print("Stub::<unknown> " INTPTR_FORMAT, adr); + // return; + // } + // + // BarrierSet* bs = Universe::heap().barrier_set(); + // if (bs.kind() == BarrierSet::CardTableModRef && + // adr == (address)((CardTableModRefBS*)(bs)).byte_map_base) { + // visitor.print("word_map_base"); + // if (WizardMode) visitor.print(" " INTPTR_FORMAT, (long)adr); + // return; + // } + // + // Oop obj; + // if (nmethod != null && + // (obj = nmethod.embeddedOop_at(cur_insn())) != null && + // addresstoLong(obj) == adr) { + // obj.printValueOn(st); + // return; + // } + + // Fall through to a simple numeral. + visitor.printAddress(adr); + } + + void print_code_comment_on(InstructionVisitor visitor, int column, long begin, long end) { + // // First, find an oopmap in (begin, end]. + // // We use the odd half-closed interval so that oop maps and scope descs + // // which are tied to the byte after a call are printed with the call itself. + // Address base = nm.instructionsBegin(); + // OopMapSet oms = nm.oop_maps(); + // if (oms != null) { + // for (int i = 0, imax = oms.size(); i < imax; i++) { + // OopMap* om = oms.at(i); + // address pc = base + om.offset(); + // if (pc > begin) { + // if (pc <= end) { + // st.move_to(column); + // st.print("; "); + // om.print_on(st); + // } + // break; + // } + // } + // } + + // // Print any debug info present at this pc. + // ScopeDesc* sd = scope_desc_in(begin, end); + // if (sd != null) { + // st.move_to(column); + // if (sd.bci() == SynchronizationEntryBCI) { + // st.print(";*synchronization entry"); + // } else { + // if (sd.method().is_null()) { + // st.print("method is null"); + // } else if (sd.method().is_native()) { + // st.print("method is native"); + // } else { + // address bcp = sd.method().bcp_from(sd.bci()); + // Bytecodes::Code bc = Bytecodes::java_code_at(bcp); + // st.print(";*%s", Bytecodes::name(bc)); + // switch (bc) { + // case Bytecodes::_invokevirtual: + // case Bytecodes::_invokespecial: + // case Bytecodes::_invokestatic: + // case Bytecodes::_invokeinterface: + // { + // Bytecode_invoke* invoke = Bytecode_invoke_at(sd.method(), sd.bci()); + // st.print(" "); + // if (invoke.name() != null) + // invoke.name().print_symbol_on(st); + // else + // st.print("<UNKNOWN>"); + // break; + // } + // case Bytecodes::_getfield: + // case Bytecodes::_putfield: + // case Bytecodes::_getstatic: + // case Bytecodes::_putstatic: + // { + // methodHandle sdm = sd.method(); + // Bytecode_field* field = Bytecode_field_at(sdm(), sdm.bcp_from(sd.bci())); + // constantPoolOop sdmc = sdm.constants(); + // symbolOop name = sdmc.name_ref_at(field.index()); + // st.print(" "); + // if (name != null) + // name.print_symbol_on(st); + // else + // st.print("<UNKNOWN>"); + // } + // } + // } + // } + + // // Print all scopes + // for (;sd != null; sd = sd.sender()) { + // st.move_to(column); + // st.print("; -"); + // if (sd.method().is_null()) { + // st.print("method is null"); + // } else { + // sd.method().print_short_name(st); + // } + // int lineno = sd.method().line_number_from_bci(sd.bci()); + // if (lineno != -1) { + // st.print("@%d (line %d)", sd.bci(), lineno); + // } else { + // st.print("@%d", sd.bci()); + // } + // st.println(); + // } + // } + + // // Print relocation information + // const char* str = reloc_string_for(begin, end); + // if (str != null) { + // if (sd != null) st.println(); + // st.move_to(column); + // st.print("; {%s}", str); + // } + // int cont_offset = ImplicitExceptionTable(this).at(begin - instructions_begin()); + // if (cont_offset != 0) { + // st.move_to(column); + // st.print("; implicit exception: dispatches to " INTPTR_FORMAT, instructions_begin() + cont_offset); + // } + + } + }

agent/src/share/classes/sun/jvm/hotspot/asm/Disassembler.java
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