Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1 | // Copyright 2009 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 29 | /** |
| 30 | * Constructs a mapper that maps addresses into code entries. |
| 31 | * |
| 32 | * @constructor |
| 33 | */ |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 34 | function CodeMap() { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 35 | /** |
| 36 | * Dynamic code entries. Used for JIT compiled code. |
| 37 | */ |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 38 | this.dynamics_ = new SplayTree(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 39 | |
| 40 | /** |
| 41 | * Name generator for entries having duplicate names. |
| 42 | */ |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 43 | this.dynamicsNameGen_ = new CodeMap.NameGenerator(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 44 | |
| 45 | /** |
| 46 | * Static code entries. Used for statically compiled code. |
| 47 | */ |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 48 | this.statics_ = new SplayTree(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 49 | |
| 50 | /** |
| 51 | * Libraries entries. Used for the whole static code libraries. |
| 52 | */ |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 53 | this.libraries_ = new SplayTree(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 54 | |
| 55 | /** |
| 56 | * Map of memory pages occupied with static code. |
| 57 | */ |
| 58 | this.pages_ = []; |
| 59 | }; |
| 60 | |
| 61 | |
| 62 | /** |
| 63 | * The number of alignment bits in a page address. |
| 64 | */ |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 65 | CodeMap.PAGE_ALIGNMENT = 12; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 66 | |
| 67 | |
| 68 | /** |
| 69 | * Page size in bytes. |
| 70 | */ |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 71 | CodeMap.PAGE_SIZE = |
| 72 | 1 << CodeMap.PAGE_ALIGNMENT; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 73 | |
| 74 | |
| 75 | /** |
| 76 | * Adds a dynamic (i.e. moveable and discardable) code entry. |
| 77 | * |
| 78 | * @param {number} start The starting address. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 79 | * @param {CodeMap.CodeEntry} codeEntry Code entry object. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 80 | */ |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 81 | CodeMap.prototype.addCode = function(start, codeEntry) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 82 | this.dynamics_.insert(start, codeEntry); |
| 83 | }; |
| 84 | |
| 85 | |
| 86 | /** |
| 87 | * Moves a dynamic code entry. Throws an exception if there is no dynamic |
| 88 | * code entry with the specified starting address. |
| 89 | * |
| 90 | * @param {number} from The starting address of the entry being moved. |
| 91 | * @param {number} to The destination address. |
| 92 | */ |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 93 | CodeMap.prototype.moveCode = function(from, to) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 94 | var removedNode = this.dynamics_.remove(from); |
| 95 | this.dynamics_.insert(to, removedNode.value); |
| 96 | }; |
| 97 | |
| 98 | |
| 99 | /** |
| 100 | * Discards a dynamic code entry. Throws an exception if there is no dynamic |
| 101 | * code entry with the specified starting address. |
| 102 | * |
| 103 | * @param {number} start The starting address of the entry being deleted. |
| 104 | */ |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 105 | CodeMap.prototype.deleteCode = function(start) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 106 | var removedNode = this.dynamics_.remove(start); |
| 107 | }; |
| 108 | |
| 109 | |
| 110 | /** |
| 111 | * Adds a library entry. |
| 112 | * |
| 113 | * @param {number} start The starting address. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 114 | * @param {CodeMap.CodeEntry} codeEntry Code entry object. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 115 | */ |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 116 | CodeMap.prototype.addLibrary = function( |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 117 | start, codeEntry) { |
| 118 | this.markPages_(start, start + codeEntry.size); |
| 119 | this.libraries_.insert(start, codeEntry); |
| 120 | }; |
| 121 | |
| 122 | |
| 123 | /** |
| 124 | * Adds a static code entry. |
| 125 | * |
| 126 | * @param {number} start The starting address. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 127 | * @param {CodeMap.CodeEntry} codeEntry Code entry object. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 128 | */ |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 129 | CodeMap.prototype.addStaticCode = function( |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 130 | start, codeEntry) { |
| 131 | this.statics_.insert(start, codeEntry); |
| 132 | }; |
| 133 | |
| 134 | |
| 135 | /** |
| 136 | * @private |
| 137 | */ |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 138 | CodeMap.prototype.markPages_ = function(start, end) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 139 | for (var addr = start; addr <= end; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 140 | addr += CodeMap.PAGE_SIZE) { |
| 141 | this.pages_[addr >>> CodeMap.PAGE_ALIGNMENT] = 1; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 142 | } |
| 143 | }; |
| 144 | |
| 145 | |
| 146 | /** |
| 147 | * @private |
| 148 | */ |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 149 | CodeMap.prototype.isAddressBelongsTo_ = function(addr, node) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 150 | return addr >= node.key && addr < (node.key + node.value.size); |
| 151 | }; |
| 152 | |
| 153 | |
| 154 | /** |
| 155 | * @private |
| 156 | */ |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 157 | CodeMap.prototype.findInTree_ = function(tree, addr) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 158 | var node = tree.findGreatestLessThan(addr); |
| 159 | return node && this.isAddressBelongsTo_(addr, node) ? node.value : null; |
| 160 | }; |
| 161 | |
| 162 | |
| 163 | /** |
| 164 | * Finds a code entry that contains the specified address. Both static and |
| 165 | * dynamic code entries are considered. |
| 166 | * |
| 167 | * @param {number} addr Address. |
| 168 | */ |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 169 | CodeMap.prototype.findEntry = function(addr) { |
| 170 | var pageAddr = addr >>> CodeMap.PAGE_ALIGNMENT; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 171 | if (pageAddr in this.pages_) { |
| 172 | // Static code entries can contain "holes" of unnamed code. |
| 173 | // In this case, the whole library is assigned to this address. |
| 174 | return this.findInTree_(this.statics_, addr) || |
| 175 | this.findInTree_(this.libraries_, addr); |
| 176 | } |
| 177 | var min = this.dynamics_.findMin(); |
| 178 | var max = this.dynamics_.findMax(); |
| 179 | if (max != null && addr < (max.key + max.value.size) && addr >= min.key) { |
| 180 | var dynaEntry = this.findInTree_(this.dynamics_, addr); |
| 181 | if (dynaEntry == null) return null; |
| 182 | // Dedupe entry name. |
| 183 | if (!dynaEntry.nameUpdated_) { |
| 184 | dynaEntry.name = this.dynamicsNameGen_.getName(dynaEntry.name); |
| 185 | dynaEntry.nameUpdated_ = true; |
| 186 | } |
| 187 | return dynaEntry; |
| 188 | } |
| 189 | return null; |
| 190 | }; |
| 191 | |
| 192 | |
| 193 | /** |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 194 | * Returns a dynamic code entry using its starting address. |
| 195 | * |
| 196 | * @param {number} addr Address. |
| 197 | */ |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 198 | CodeMap.prototype.findDynamicEntryByStartAddress = |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 199 | function(addr) { |
| 200 | var node = this.dynamics_.find(addr); |
| 201 | return node ? node.value : null; |
| 202 | }; |
| 203 | |
| 204 | |
| 205 | /** |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 206 | * Returns an array of all dynamic code entries. |
| 207 | */ |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 208 | CodeMap.prototype.getAllDynamicEntries = function() { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 209 | return this.dynamics_.exportValues(); |
| 210 | }; |
| 211 | |
| 212 | |
| 213 | /** |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame^] | 214 | * Returns an array of pairs of all dynamic code entries and their addresses. |
| 215 | */ |
| 216 | CodeMap.prototype.getAllDynamicEntriesWithAddresses = function() { |
| 217 | return this.dynamics_.exportKeysAndValues(); |
| 218 | }; |
| 219 | |
| 220 | |
| 221 | /** |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 222 | * Returns an array of all static code entries. |
| 223 | */ |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 224 | CodeMap.prototype.getAllStaticEntries = function() { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 225 | return this.statics_.exportValues(); |
| 226 | }; |
| 227 | |
| 228 | |
| 229 | /** |
| 230 | * Returns an array of all libraries entries. |
| 231 | */ |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 232 | CodeMap.prototype.getAllLibrariesEntries = function() { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 233 | return this.libraries_.exportValues(); |
| 234 | }; |
| 235 | |
| 236 | |
| 237 | /** |
| 238 | * Creates a code entry object. |
| 239 | * |
| 240 | * @param {number} size Code entry size in bytes. |
| 241 | * @param {string} opt_name Code entry name. |
| 242 | * @constructor |
| 243 | */ |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 244 | CodeMap.CodeEntry = function(size, opt_name) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 245 | this.size = size; |
| 246 | this.name = opt_name || ''; |
| 247 | this.nameUpdated_ = false; |
| 248 | }; |
| 249 | |
| 250 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 251 | CodeMap.CodeEntry.prototype.getName = function() { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 252 | return this.name; |
| 253 | }; |
| 254 | |
| 255 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 256 | CodeMap.CodeEntry.prototype.toString = function() { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 257 | return this.name + ': ' + this.size.toString(16); |
| 258 | }; |
| 259 | |
| 260 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 261 | CodeMap.NameGenerator = function() { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 262 | this.knownNames_ = {}; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 263 | }; |
| 264 | |
| 265 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 266 | CodeMap.NameGenerator.prototype.getName = function(name) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 267 | if (!(name in this.knownNames_)) { |
| 268 | this.knownNames_[name] = 0; |
| 269 | return name; |
| 270 | } |
| 271 | var count = ++this.knownNames_[name]; |
| 272 | return name + ' {' + count + '}'; |
| 273 | }; |