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annotate c1x4hotspotsrc/HotSpotVM/src/com/sun/hotspot/c1x/Logger.java @ 1422:3483ec571caf

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* using reflected objects instead of oops * removed scratch from allocatable registers * instanceof xir snippet * arraylength xir snippet * exceptionobject xir snippet * VMEntries and VMExits as interfaces * calls to VMEntries and VMExits are routet through logging proxies
author Lukas Stadler <lukas.stadler@oracle.com>
date Mon, 02 Aug 2010 15:44:38 -0700
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1422
3483ec571caf * using reflected objects instead of oops
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1 package com.sun.hotspot.c1x;
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2
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3 import java.lang.reflect.*;
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4 import java.util.*;
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5
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6 public class Logger {
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7
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8 private static final boolean ENABLED = true;
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9 private static final int SPACING = 2;
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10 private static Deque<Boolean> openStack = new LinkedList<Boolean>();
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11 private static boolean open = false;
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12 private static int level = 0;
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13
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14 public static void log(String message) {
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15 if (ENABLED) {
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16 if (open) {
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17 System.out.println("...");
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18 open = false;
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19 }
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20 System.out.print(space(level));
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21 System.out.println(message);
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22 }
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23 }
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24
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25 public static void startScope(String message) {
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26 if (ENABLED) {
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27 if (open) {
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28 System.out.println("...");
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29 open = false;
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30 }
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31 System.out.print(space(level));
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32 System.out.print(message);
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33 openStack.push(open);
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34 open = true;
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35 level++;
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36 }
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37 }
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38
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39 public static void endScope(String message) {
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40 if (ENABLED) {
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41 level--;
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42 if (open)
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43 System.out.println(message);
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44 else
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45 System.out.println(space(level) + "..." + message);
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46 open = openStack.pop();
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47 }
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48 }
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49
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50 private static String[] spaces = new String[50];
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51
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52 private static String space(int count) {
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53 assert count >= 0;
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54 String result;
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55 if (count >= spaces.length || spaces[count] == null) {
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56 StringBuilder str = new StringBuilder();
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57 for (int i = 0; i < count * SPACING; i++)
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58 str.append(' ');
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59 result = str.toString();
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60 if (count < spaces.length)
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61 spaces[count] = result;
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62 } else {
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63 result = spaces[count];
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64 }
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65 return result;
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66 }
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67
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68 public static String pretty(Object value) {
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69 if (value instanceof Method) {
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70 return "method \"" + ((Method) value).getName() + "\"";
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71 } else if (value instanceof Class<?>) {
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72 return "class \"" + ((Class<?>) value).getSimpleName() + "\"";
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73 } else if (value instanceof Void) {
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74 return "void";
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75 } else if (value instanceof Integer) {
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76 if ((Integer) value < 10)
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77 return value.toString();
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78 return value + " (0x" + Integer.toHexString((Integer) value) + ")";
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79 } else if (value instanceof Long) {
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80 if ((Long) value < 10)
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81 return value + "l";
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82 return value + "l (0x" + Long.toHexString((Long) value) + "l)";
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83 }
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84 return value == null ? "null" : value.toString();
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85 }
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86 }