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1 /*
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2 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 # include "incls/_precompiled.incl"
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26 # include "incls/_disassembler_sparc.cpp.incl"
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27
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28 #ifndef PRODUCT
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29
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30 #define SPARC_VERSION (VM_Version::v9_instructions_work()? \
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31 (VM_Version::v8_instructions_work()? "" : "9") : "8")
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32
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33 // This routine is in the shared library:
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34 typedef unsigned char* print_insn_sparc_t(unsigned char* start, DisassemblerEnv* env,
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35 const char* sparc_version);
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36
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37 void* Disassembler::_library = NULL;
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38 dll_func Disassembler::_print_insn_sparc = NULL;
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39
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40 bool Disassembler::load_library() {
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41 if (_library == NULL) {
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42 char buf[1024];
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43 char ebuf[1024];
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44 sprintf(buf, "disassembler%s", os::dll_file_extension());
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45 _library = hpi::dll_load(buf, ebuf, sizeof ebuf);
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46 if (_library != NULL) {
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47 tty->print_cr("Loaded disassembler");
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48 _print_insn_sparc = CAST_TO_FN_PTR(dll_func, hpi::dll_lookup(_library, "print_insn_sparc"));
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49 }
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50 }
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51 return (_library != NULL) && (_print_insn_sparc != NULL);
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52 }
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53
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54
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55 class sparc_env : public DisassemblerEnv {
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56 private:
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57 nmethod* code;
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58 outputStream* output;
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59 const char* version;
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60
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61 static void print_address(address value, outputStream* st);
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62
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63 public:
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64 sparc_env(nmethod* rcode, outputStream* routput) {
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65 code = rcode;
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66 output = routput;
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67 version = SPARC_VERSION;
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68 }
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69 const char* sparc_version() { return version; }
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70 void print_label(intptr_t value);
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71 void print_raw(char* str) { output->print_raw(str); }
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72 void print(char* format, ...);
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73 char* string_for_offset(intptr_t value);
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74 char* string_for_constant(unsigned char* pc, intptr_t value, int is_decimal);
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75 };
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76
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77
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78 void sparc_env::print_address(address adr, outputStream* st) {
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79 if (!Universe::is_fully_initialized()) {
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80 st->print(INTPTR_FORMAT, (intptr_t)adr);
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81 return;
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82 }
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83 if (StubRoutines::contains(adr)) {
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84 StubCodeDesc *desc = StubCodeDesc::desc_for(adr);
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85 if (desc == NULL)
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86 desc = StubCodeDesc::desc_for(adr + frame::pc_return_offset);
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87 if (desc == NULL)
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88 st->print("Unknown stub at " INTPTR_FORMAT, adr);
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89 else {
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90 st->print("Stub::%s", desc->name());
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91 if (desc->begin() != adr)
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92 st->print("%+d 0x%p",adr - desc->begin(), adr);
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93 else if (WizardMode) st->print(" " INTPTR_FORMAT, adr);
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94 }
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95 } else {
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96 BarrierSet* bs = Universe::heap()->barrier_set();
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97 if (bs->kind() == BarrierSet::CardTableModRef &&
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98 adr == (address)((CardTableModRefBS*)(bs))->byte_map_base) {
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99 st->print("word_map_base");
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100 if (WizardMode) st->print(" " INTPTR_FORMAT, (intptr_t)adr);
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101 } else {
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102 st->print(INTPTR_FORMAT, (intptr_t)adr);
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103 }
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104 }
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105 }
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106
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107
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108 // called by the disassembler to print out jump addresses
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109 void sparc_env::print_label(intptr_t value) {
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110 print_address((address) value, output);
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111 }
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112
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113 void sparc_env::print(char* format, ...) {
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114 va_list ap;
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115 va_start(ap, format);
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116 output->vprint(format, ap);
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117 va_end(ap);
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118 }
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119
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120 char* sparc_env::string_for_offset(intptr_t value) {
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121 stringStream st;
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122 print_address((address) value, &st);
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123 return st.as_string();
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124 }
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125
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126 char* sparc_env::string_for_constant(unsigned char* pc, intptr_t value, int is_decimal) {
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127 stringStream st;
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128 oop obj;
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129 if (code && (obj = code->embeddedOop_at(pc)) != NULL) {
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130 obj->print_value_on(&st);
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131 } else
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132 {
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133 print_address((address) value, &st);
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134 }
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135 return st.as_string();
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136 }
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137
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138
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139 address Disassembler::decode_instruction(address start, DisassemblerEnv* env) {
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140 const char* version = ((sparc_env*)env)->sparc_version();
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141 return ((print_insn_sparc_t*) _print_insn_sparc)(start, env, version);
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142 }
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143
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144
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145 const int show_bytes = false; // for disassembler debugging
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146
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147
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148 void Disassembler::decode(CodeBlob* cb, outputStream* st) {
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149 st = st ? st : tty;
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150 st->print_cr("Decoding CodeBlob " INTPTR_FORMAT, cb);
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151 decode(cb->instructions_begin(), cb->instructions_end(), st);
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152 }
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153
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154
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155 void Disassembler::decode(u_char* begin, u_char* end, outputStream* st) {
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156 assert ((((intptr_t)begin | (intptr_t)end) % sizeof(int) == 0), "misaligned insn addr");
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157 st = st ? st : tty;
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158 if (!load_library()) {
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159 st->print_cr("Could not load disassembler");
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160 return;
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161 }
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162 sparc_env env(NULL, st);
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163 unsigned char* p = (unsigned char*) begin;
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164 CodeBlob* cb = CodeCache::find_blob_unsafe(begin);
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165 while (p < (unsigned char*) end && p) {
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166 if (cb != NULL) {
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167 cb->print_block_comment(st, (intptr_t)(p - cb->instructions_begin()));
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168 }
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169
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170 unsigned char* p0 = p;
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171 st->print(INTPTR_FORMAT ": ", p);
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172 p = decode_instruction(p, &env);
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173 if (show_bytes && p) {
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174 st->print("\t\t\t");
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175 while (p0 < p) { st->print("%08lx ", *(int*)p0); p0 += sizeof(int); }
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176 }
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177 st->cr();
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178 }
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179 }
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180
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181
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182 void Disassembler::decode(nmethod* nm, outputStream* st) {
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183 st = st ? st : tty;
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184
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185 st->print_cr("Decoding compiled method " INTPTR_FORMAT ":", nm);
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186 st->print("Code:");
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187 st->cr();
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188
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189 if (!load_library()) {
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190 st->print_cr("Could not load disassembler");
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191 return;
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192 }
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193 sparc_env env(nm, st);
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194 unsigned char* p = nm->instructions_begin();
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195 unsigned char* end = nm->instructions_end();
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196 assert ((((intptr_t)p | (intptr_t)end) % sizeof(int) == 0), "misaligned insn addr");
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197
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198 unsigned char *p1 = p;
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199 int total_bucket_count = 0;
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200 while (p1 < end && p1) {
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201 unsigned char *p0 = p1;
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202 ++p1;
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203 address bucket_pc = FlatProfiler::bucket_start_for(p1);
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204 if (bucket_pc != NULL && bucket_pc > p0 && bucket_pc <= p1)
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205 total_bucket_count += FlatProfiler::bucket_count_for(p0);
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206 }
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207
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208 while (p < end && p) {
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209 if (p == nm->entry_point()) st->print_cr("[Entry Point]");
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210 if (p == nm->verified_entry_point()) st->print_cr("[Verified Entry Point]");
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211 if (p == nm->exception_begin()) st->print_cr("[Exception Handler]");
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212 if (p == nm->stub_begin()) st->print_cr("[Stub Code]");
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213 if (p == nm->consts_begin()) st->print_cr("[Constants]");
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214 nm->print_block_comment(st, (intptr_t)(p - nm->instructions_begin()));
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215 unsigned char* p0 = p;
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216 st->print(" " INTPTR_FORMAT ": ", p);
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217 p = decode_instruction(p, &env);
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218 nm->print_code_comment_on(st, 40, p0, p);
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219 st->cr();
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220 // Output pc bucket ticks if we have any
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221 address bucket_pc = FlatProfiler::bucket_start_for(p);
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222 if (bucket_pc != NULL && bucket_pc > p0 && bucket_pc <= p) {
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223 int bucket_count = FlatProfiler::bucket_count_for(p0);
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224 tty->print_cr("%3.1f%% [%d]", bucket_count*100.0/total_bucket_count, bucket_count);
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225 tty->cr();
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226 }
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227 }
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228 }
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229
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230 #endif // PRODUCT
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