| 1 | /* cg_print.c - Print routines for displaying call graphs. |
| 2 | |
| 3 | Copyright 2000, 2001, 2002, 2004, 2007, 2009, 2011 |
| 4 | Free Software Foundation, Inc. |
| 5 | |
| 6 | This file is part of GNU Binutils. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA |
| 21 | 02110-1301, USA. */ |
| 22 | \f |
| 23 | #include "gprof.h" |
| 24 | #include "libiberty.h" |
| 25 | #include "filenames.h" |
| 26 | #include "search_list.h" |
| 27 | #include "source.h" |
| 28 | #include "symtab.h" |
| 29 | #include "cg_arcs.h" |
| 30 | #include "cg_print.h" |
| 31 | #include "hist.h" |
| 32 | #include "utils.h" |
| 33 | #include "corefile.h" |
| 34 | |
| 35 | /* Return value of comparison functions used to sort tables. */ |
| 36 | #define LESSTHAN -1 |
| 37 | #define EQUALTO 0 |
| 38 | #define GREATERTHAN 1 |
| 39 | |
| 40 | static void print_header (void); |
| 41 | static void print_cycle (Sym *); |
| 42 | static int cmp_member (Sym *, Sym *); |
| 43 | static void sort_members (Sym *); |
| 44 | static void print_members (Sym *); |
| 45 | static int cmp_arc (Arc *, Arc *); |
| 46 | static void sort_parents (Sym *); |
| 47 | static void print_parents (Sym *); |
| 48 | static void sort_children (Sym *); |
| 49 | static void print_children (Sym *); |
| 50 | static void print_line (Sym *); |
| 51 | static int cmp_name (const PTR, const PTR); |
| 52 | static int cmp_arc_count (const PTR, const PTR); |
| 53 | static int cmp_fun_nuses (const PTR, const PTR); |
| 54 | static void order_and_dump_functions_by_arcs |
| 55 | (Arc **, unsigned long, int, Arc **, unsigned long *); |
| 56 | |
| 57 | /* Declarations of automatically generated functions to output blurbs. */ |
| 58 | extern void bsd_callg_blurb (FILE * fp); |
| 59 | extern void fsf_callg_blurb (FILE * fp); |
| 60 | |
| 61 | double print_time = 0.0; |
| 62 | |
| 63 | |
| 64 | static void |
| 65 | print_header () |
| 66 | { |
| 67 | if (first_output) |
| 68 | first_output = FALSE; |
| 69 | else |
| 70 | printf ("\f\n"); |
| 71 | |
| 72 | if (!bsd_style_output) |
| 73 | { |
| 74 | if (print_descriptions) |
| 75 | printf (_("\t\t Call graph (explanation follows)\n\n")); |
| 76 | else |
| 77 | printf (_("\t\t\tCall graph\n\n")); |
| 78 | } |
| 79 | |
| 80 | printf (_("\ngranularity: each sample hit covers %ld byte(s)"), |
| 81 | (long) hist_scale * (long) sizeof (UNIT)); |
| 82 | |
| 83 | if (print_time > 0.0) |
| 84 | printf (_(" for %.2f%% of %.2f seconds\n\n"), |
| 85 | 100.0 / print_time, print_time / hz); |
| 86 | else |
| 87 | { |
| 88 | printf (_(" no time propagated\n\n")); |
| 89 | |
| 90 | /* This doesn't hurt, since all the numerators will be 0.0. */ |
| 91 | print_time = 1.0; |
| 92 | } |
| 93 | |
| 94 | if (bsd_style_output) |
| 95 | { |
| 96 | printf ("%6.6s %5.5s %7.7s %11.11s %7.7s/%-7.7s %-8.8s\n", |
| 97 | "", "", "", "", _("called"), _("total"), _("parents")); |
| 98 | printf ("%-6.6s %5.5s %7.7s %11.11s %7.7s+%-7.7s %-8.8s\t%5.5s\n", |
| 99 | _("index"), |
| 100 | /* xgettext:no-c-format */ |
| 101 | _("%time"), |
| 102 | _("self"), _("descendants"), _("called"), _("self"), |
| 103 | _("name"), _("index")); |
| 104 | printf ("%6.6s %5.5s %7.7s %11.11s %7.7s/%-7.7s %-8.8s\n", |
| 105 | "", "", "", "", _("called"), _("total"), _("children")); |
| 106 | printf ("\n"); |
| 107 | } |
| 108 | else |
| 109 | { |
| 110 | printf (_("index %% time self children called name\n")); |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | /* Print a cycle header. */ |
| 115 | |
| 116 | static void |
| 117 | print_cycle (Sym *cyc) |
| 118 | { |
| 119 | char buf[BUFSIZ]; |
| 120 | |
| 121 | sprintf (buf, "[%d]", cyc->cg.index); |
| 122 | printf (bsd_style_output |
| 123 | ? "%-6.6s %5.1f %7.2f %11.2f %7lu" |
| 124 | : "%-6.6s %5.1f %7.2f %7.2f %7lu", buf, |
| 125 | 100 * (cyc->cg.prop.self + cyc->cg.prop.child) / print_time, |
| 126 | cyc->cg.prop.self / hz, cyc->cg.prop.child / hz, cyc->ncalls); |
| 127 | |
| 128 | if (cyc->cg.self_calls != 0) |
| 129 | printf ("+%-7lu", cyc->cg.self_calls); |
| 130 | else |
| 131 | printf (" %7.7s", ""); |
| 132 | |
| 133 | printf (_(" <cycle %d as a whole> [%d]\n"), cyc->cg.cyc.num, cyc->cg.index); |
| 134 | } |
| 135 | |
| 136 | /* Compare LEFT and RIGHT membmer. Major comparison key is |
| 137 | CG.PROP.SELF+CG.PROP.CHILD, secondary key is NCALLS+CG.SELF_CALLS. */ |
| 138 | |
| 139 | static int |
| 140 | cmp_member (Sym *left, Sym *right) |
| 141 | { |
| 142 | double left_time = left->cg.prop.self + left->cg.prop.child; |
| 143 | double right_time = right->cg.prop.self + right->cg.prop.child; |
| 144 | unsigned long left_calls = left->ncalls + left->cg.self_calls; |
| 145 | unsigned long right_calls = right->ncalls + right->cg.self_calls; |
| 146 | |
| 147 | if (left_time > right_time) |
| 148 | return GREATERTHAN; |
| 149 | |
| 150 | if (left_time < right_time) |
| 151 | return LESSTHAN; |
| 152 | |
| 153 | if (left_calls > right_calls) |
| 154 | return GREATERTHAN; |
| 155 | |
| 156 | if (left_calls < right_calls) |
| 157 | return LESSTHAN; |
| 158 | |
| 159 | return EQUALTO; |
| 160 | } |
| 161 | |
| 162 | /* Sort members of a cycle. */ |
| 163 | |
| 164 | static void |
| 165 | sort_members (Sym *cyc) |
| 166 | { |
| 167 | Sym *todo, *doing, *prev; |
| 168 | |
| 169 | /* Detach cycle members from cyclehead, |
| 170 | and insertion sort them back on. */ |
| 171 | todo = cyc->cg.cyc.next; |
| 172 | cyc->cg.cyc.next = 0; |
| 173 | |
| 174 | for (doing = todo; doing != NULL; doing = todo) |
| 175 | { |
| 176 | todo = doing->cg.cyc.next; |
| 177 | |
| 178 | for (prev = cyc; prev->cg.cyc.next; prev = prev->cg.cyc.next) |
| 179 | { |
| 180 | if (cmp_member (doing, prev->cg.cyc.next) == GREATERTHAN) |
| 181 | break; |
| 182 | } |
| 183 | |
| 184 | doing->cg.cyc.next = prev->cg.cyc.next; |
| 185 | prev->cg.cyc.next = doing; |
| 186 | } |
| 187 | } |
| 188 | |
| 189 | /* Print the members of a cycle. */ |
| 190 | |
| 191 | static void |
| 192 | print_members (Sym *cyc) |
| 193 | { |
| 194 | Sym *member; |
| 195 | |
| 196 | sort_members (cyc); |
| 197 | |
| 198 | for (member = cyc->cg.cyc.next; member; member = member->cg.cyc.next) |
| 199 | { |
| 200 | printf (bsd_style_output |
| 201 | ? "%6.6s %5.5s %7.2f %11.2f %7lu" |
| 202 | : "%6.6s %5.5s %7.2f %7.2f %7lu", |
| 203 | "", "", member->cg.prop.self / hz, member->cg.prop.child / hz, |
| 204 | member->ncalls); |
| 205 | |
| 206 | if (member->cg.self_calls != 0) |
| 207 | printf ("+%-7lu", member->cg.self_calls); |
| 208 | else |
| 209 | printf (" %7.7s", ""); |
| 210 | |
| 211 | printf (" "); |
| 212 | print_name (member); |
| 213 | printf ("\n"); |
| 214 | } |
| 215 | } |
| 216 | |
| 217 | /* Compare two arcs to/from the same child/parent. |
| 218 | - if one arc is a self arc, it's least. |
| 219 | - if one arc is within a cycle, it's less than. |
| 220 | - if both arcs are within a cycle, compare arc counts. |
| 221 | - if neither arc is within a cycle, compare with |
| 222 | time + child_time as major key |
| 223 | arc count as minor key. */ |
| 224 | |
| 225 | static int |
| 226 | cmp_arc (Arc *left, Arc *right) |
| 227 | { |
| 228 | Sym *left_parent = left->parent; |
| 229 | Sym *left_child = left->child; |
| 230 | Sym *right_parent = right->parent; |
| 231 | Sym *right_child = right->child; |
| 232 | double left_time, right_time; |
| 233 | |
| 234 | DBG (TIMEDEBUG, |
| 235 | printf ("[cmp_arc] "); |
| 236 | print_name (left_parent); |
| 237 | printf (" calls "); |
| 238 | print_name (left_child); |
| 239 | printf (" %f + %f %lu/%lu\n", left->time, left->child_time, |
| 240 | left->count, left_child->ncalls); |
| 241 | printf ("[cmp_arc] "); |
| 242 | print_name (right_parent); |
| 243 | printf (" calls "); |
| 244 | print_name (right_child); |
| 245 | printf (" %f + %f %lu/%lu\n", right->time, right->child_time, |
| 246 | right->count, right_child->ncalls); |
| 247 | printf ("\n"); |
| 248 | ); |
| 249 | |
| 250 | if (left_parent == left_child) |
| 251 | return LESSTHAN; /* Left is a self call. */ |
| 252 | |
| 253 | if (right_parent == right_child) |
| 254 | return GREATERTHAN; /* Right is a self call. */ |
| 255 | |
| 256 | if (left_parent->cg.cyc.num != 0 && left_child->cg.cyc.num != 0 |
| 257 | && left_parent->cg.cyc.num == left_child->cg.cyc.num) |
| 258 | { |
| 259 | /* Left is a call within a cycle. */ |
| 260 | if (right_parent->cg.cyc.num != 0 && right_child->cg.cyc.num != 0 |
| 261 | && right_parent->cg.cyc.num == right_child->cg.cyc.num) |
| 262 | { |
| 263 | /* Right is a call within the cycle, too. */ |
| 264 | if (left->count < right->count) |
| 265 | return LESSTHAN; |
| 266 | |
| 267 | if (left->count > right->count) |
| 268 | return GREATERTHAN; |
| 269 | |
| 270 | return EQUALTO; |
| 271 | } |
| 272 | else |
| 273 | { |
| 274 | /* Right isn't a call within the cycle. */ |
| 275 | return LESSTHAN; |
| 276 | } |
| 277 | } |
| 278 | else |
| 279 | { |
| 280 | /* Left isn't a call within a cycle. */ |
| 281 | if (right_parent->cg.cyc.num != 0 && right_child->cg.cyc.num != 0 |
| 282 | && right_parent->cg.cyc.num == right_child->cg.cyc.num) |
| 283 | { |
| 284 | /* Right is a call within a cycle. */ |
| 285 | return GREATERTHAN; |
| 286 | } |
| 287 | else |
| 288 | { |
| 289 | /* Neither is a call within a cycle. */ |
| 290 | left_time = left->time + left->child_time; |
| 291 | right_time = right->time + right->child_time; |
| 292 | |
| 293 | if (left_time < right_time) |
| 294 | return LESSTHAN; |
| 295 | |
| 296 | if (left_time > right_time) |
| 297 | return GREATERTHAN; |
| 298 | |
| 299 | if (left->count < right->count) |
| 300 | return LESSTHAN; |
| 301 | |
| 302 | if (left->count > right->count) |
| 303 | return GREATERTHAN; |
| 304 | |
| 305 | return EQUALTO; |
| 306 | } |
| 307 | } |
| 308 | } |
| 309 | |
| 310 | |
| 311 | static void |
| 312 | sort_parents (Sym * child) |
| 313 | { |
| 314 | Arc *arc, *detached, sorted, *prev; |
| 315 | |
| 316 | /* Unlink parents from child, then insertion sort back on to |
| 317 | sorted's parents. |
| 318 | *arc the arc you have detached and are inserting. |
| 319 | *detached the rest of the arcs to be sorted. |
| 320 | sorted arc list onto which you insertion sort. |
| 321 | *prev arc before the arc you are comparing. */ |
| 322 | sorted.next_parent = 0; |
| 323 | |
| 324 | for (arc = child->cg.parents; arc; arc = detached) |
| 325 | { |
| 326 | detached = arc->next_parent; |
| 327 | |
| 328 | /* Consider *arc as disconnected; insert it into sorted. */ |
| 329 | for (prev = &sorted; prev->next_parent; prev = prev->next_parent) |
| 330 | { |
| 331 | if (cmp_arc (arc, prev->next_parent) != GREATERTHAN) |
| 332 | break; |
| 333 | } |
| 334 | |
| 335 | arc->next_parent = prev->next_parent; |
| 336 | prev->next_parent = arc; |
| 337 | } |
| 338 | |
| 339 | /* Reattach sorted arcs to child. */ |
| 340 | child->cg.parents = sorted.next_parent; |
| 341 | } |
| 342 | |
| 343 | |
| 344 | static void |
| 345 | print_parents (Sym *child) |
| 346 | { |
| 347 | Sym *parent; |
| 348 | Arc *arc; |
| 349 | Sym *cycle_head; |
| 350 | |
| 351 | if (child->cg.cyc.head != 0) |
| 352 | cycle_head = child->cg.cyc.head; |
| 353 | else |
| 354 | cycle_head = child; |
| 355 | |
| 356 | if (!child->cg.parents) |
| 357 | { |
| 358 | printf (bsd_style_output |
| 359 | ? _("%6.6s %5.5s %7.7s %11.11s %7.7s %7.7s <spontaneous>\n") |
| 360 | : _("%6.6s %5.5s %7.7s %7.7s %7.7s %7.7s <spontaneous>\n"), |
| 361 | "", "", "", "", "", ""); |
| 362 | return; |
| 363 | } |
| 364 | |
| 365 | sort_parents (child); |
| 366 | |
| 367 | for (arc = child->cg.parents; arc; arc = arc->next_parent) |
| 368 | { |
| 369 | parent = arc->parent; |
| 370 | if (child == parent || (child->cg.cyc.num != 0 |
| 371 | && parent->cg.cyc.num == child->cg.cyc.num)) |
| 372 | { |
| 373 | /* Selfcall or call among siblings. */ |
| 374 | printf (bsd_style_output |
| 375 | ? "%6.6s %5.5s %7.7s %11.11s %7lu %7.7s " |
| 376 | : "%6.6s %5.5s %7.7s %7.7s %7lu %7.7s ", |
| 377 | "", "", "", "", |
| 378 | arc->count, ""); |
| 379 | print_name (parent); |
| 380 | printf ("\n"); |
| 381 | } |
| 382 | else |
| 383 | { |
| 384 | /* Regular parent of child. */ |
| 385 | printf (bsd_style_output |
| 386 | ? "%6.6s %5.5s %7.2f %11.2f %7lu/%-7lu " |
| 387 | : "%6.6s %5.5s %7.2f %7.2f %7lu/%-7lu ", |
| 388 | "", "", |
| 389 | arc->time / hz, arc->child_time / hz, |
| 390 | arc->count, cycle_head->ncalls); |
| 391 | print_name (parent); |
| 392 | printf ("\n"); |
| 393 | } |
| 394 | } |
| 395 | } |
| 396 | |
| 397 | |
| 398 | static void |
| 399 | sort_children (Sym *parent) |
| 400 | { |
| 401 | Arc *arc, *detached, sorted, *prev; |
| 402 | |
| 403 | /* Unlink children from parent, then insertion sort back on to |
| 404 | sorted's children. |
| 405 | *arc the arc you have detached and are inserting. |
| 406 | *detached the rest of the arcs to be sorted. |
| 407 | sorted arc list onto which you insertion sort. |
| 408 | *prev arc before the arc you are comparing. */ |
| 409 | sorted.next_child = 0; |
| 410 | |
| 411 | for (arc = parent->cg.children; arc; arc = detached) |
| 412 | { |
| 413 | detached = arc->next_child; |
| 414 | |
| 415 | /* Consider *arc as disconnected; insert it into sorted. */ |
| 416 | for (prev = &sorted; prev->next_child; prev = prev->next_child) |
| 417 | { |
| 418 | if (cmp_arc (arc, prev->next_child) != LESSTHAN) |
| 419 | break; |
| 420 | } |
| 421 | |
| 422 | arc->next_child = prev->next_child; |
| 423 | prev->next_child = arc; |
| 424 | } |
| 425 | |
| 426 | /* Reattach sorted children to parent. */ |
| 427 | parent->cg.children = sorted.next_child; |
| 428 | } |
| 429 | |
| 430 | |
| 431 | static void |
| 432 | print_children (Sym *parent) |
| 433 | { |
| 434 | Sym *child; |
| 435 | Arc *arc; |
| 436 | |
| 437 | sort_children (parent); |
| 438 | arc = parent->cg.children; |
| 439 | |
| 440 | for (arc = parent->cg.children; arc; arc = arc->next_child) |
| 441 | { |
| 442 | child = arc->child; |
| 443 | if (child == parent || (child->cg.cyc.num != 0 |
| 444 | && child->cg.cyc.num == parent->cg.cyc.num)) |
| 445 | { |
| 446 | /* Self call or call to sibling. */ |
| 447 | printf (bsd_style_output |
| 448 | ? "%6.6s %5.5s %7.7s %11.11s %7lu %7.7s " |
| 449 | : "%6.6s %5.5s %7.7s %7.7s %7lu %7.7s ", |
| 450 | "", "", "", "", arc->count, ""); |
| 451 | print_name (child); |
| 452 | printf ("\n"); |
| 453 | } |
| 454 | else |
| 455 | { |
| 456 | /* Regular child of parent. */ |
| 457 | printf (bsd_style_output |
| 458 | ? "%6.6s %5.5s %7.2f %11.2f %7lu/%-7lu " |
| 459 | : "%6.6s %5.5s %7.2f %7.2f %7lu/%-7lu ", |
| 460 | "", "", |
| 461 | arc->time / hz, arc->child_time / hz, |
| 462 | arc->count, child->cg.cyc.head->ncalls); |
| 463 | print_name (child); |
| 464 | printf ("\n"); |
| 465 | } |
| 466 | } |
| 467 | } |
| 468 | |
| 469 | |
| 470 | static void |
| 471 | print_line (Sym *np) |
| 472 | { |
| 473 | char buf[BUFSIZ]; |
| 474 | |
| 475 | sprintf (buf, "[%d]", np->cg.index); |
| 476 | printf (bsd_style_output |
| 477 | ? "%-6.6s %5.1f %7.2f %11.2f" |
| 478 | : "%-6.6s %5.1f %7.2f %7.2f", buf, |
| 479 | 100 * (np->cg.prop.self + np->cg.prop.child) / print_time, |
| 480 | np->cg.prop.self / hz, np->cg.prop.child / hz); |
| 481 | |
| 482 | if ((np->ncalls + np->cg.self_calls) != 0) |
| 483 | { |
| 484 | printf (" %7lu", np->ncalls); |
| 485 | |
| 486 | if (np->cg.self_calls != 0) |
| 487 | printf ("+%-7lu ", np->cg.self_calls); |
| 488 | else |
| 489 | printf (" %7.7s ", ""); |
| 490 | } |
| 491 | else |
| 492 | { |
| 493 | printf (" %7.7s %7.7s ", "", ""); |
| 494 | } |
| 495 | |
| 496 | print_name (np); |
| 497 | printf ("\n"); |
| 498 | } |
| 499 | |
| 500 | |
| 501 | /* Print dynamic call graph. */ |
| 502 | |
| 503 | void |
| 504 | cg_print (Sym ** timesortsym) |
| 505 | { |
| 506 | unsigned int sym_index; |
| 507 | Sym *parent; |
| 508 | |
| 509 | if (print_descriptions && bsd_style_output) |
| 510 | bsd_callg_blurb (stdout); |
| 511 | |
| 512 | print_header (); |
| 513 | |
| 514 | for (sym_index = 0; sym_index < symtab.len + num_cycles; ++sym_index) |
| 515 | { |
| 516 | parent = timesortsym[sym_index]; |
| 517 | |
| 518 | if ((ignore_zeros && parent->ncalls == 0 |
| 519 | && parent->cg.self_calls == 0 && parent->cg.prop.self == 0 |
| 520 | && parent->cg.prop.child == 0) |
| 521 | || !parent->cg.print_flag |
| 522 | || (line_granularity && ! parent->is_func)) |
| 523 | continue; |
| 524 | |
| 525 | if (!parent->name && parent->cg.cyc.num != 0) |
| 526 | { |
| 527 | /* Cycle header. */ |
| 528 | print_cycle (parent); |
| 529 | print_members (parent); |
| 530 | } |
| 531 | else |
| 532 | { |
| 533 | print_parents (parent); |
| 534 | print_line (parent); |
| 535 | print_children (parent); |
| 536 | } |
| 537 | |
| 538 | if (bsd_style_output) |
| 539 | printf ("\n"); |
| 540 | |
| 541 | printf ("-----------------------------------------------\n"); |
| 542 | |
| 543 | if (bsd_style_output) |
| 544 | printf ("\n"); |
| 545 | } |
| 546 | |
| 547 | free (timesortsym); |
| 548 | |
| 549 | if (print_descriptions && !bsd_style_output) |
| 550 | fsf_callg_blurb (stdout); |
| 551 | } |
| 552 | |
| 553 | |
| 554 | static int |
| 555 | cmp_name (const PTR left, const PTR right) |
| 556 | { |
| 557 | const Sym **npp1 = (const Sym **) left; |
| 558 | const Sym **npp2 = (const Sym **) right; |
| 559 | |
| 560 | return strcmp ((*npp1)->name, (*npp2)->name); |
| 561 | } |
| 562 | |
| 563 | |
| 564 | void |
| 565 | cg_print_index () |
| 566 | { |
| 567 | unsigned int sym_index; |
| 568 | unsigned int nnames, todo, i, j; |
| 569 | int col, starting_col; |
| 570 | Sym **name_sorted_syms, *sym; |
| 571 | const char *filename; |
| 572 | char buf[20]; |
| 573 | int column_width = (output_width - 1) / 3; /* Don't write in last col! */ |
| 574 | |
| 575 | /* Now, sort regular function name |
| 576 | alphabetically to create an index. */ |
| 577 | name_sorted_syms = (Sym **) xmalloc ((symtab.len + num_cycles) * sizeof (Sym *)); |
| 578 | |
| 579 | for (sym_index = 0, nnames = 0; sym_index < symtab.len; sym_index++) |
| 580 | { |
| 581 | if (ignore_zeros && symtab.base[sym_index].ncalls == 0 |
| 582 | && symtab.base[sym_index].hist.time == 0) |
| 583 | continue; |
| 584 | |
| 585 | name_sorted_syms[nnames++] = &symtab.base[sym_index]; |
| 586 | } |
| 587 | |
| 588 | qsort (name_sorted_syms, nnames, sizeof (Sym *), cmp_name); |
| 589 | |
| 590 | for (sym_index = 1, todo = nnames; sym_index <= num_cycles; sym_index++) |
| 591 | name_sorted_syms[todo++] = &cycle_header[sym_index]; |
| 592 | |
| 593 | printf ("\f\n"); |
| 594 | printf (_("Index by function name\n\n")); |
| 595 | sym_index = (todo + 2) / 3; |
| 596 | |
| 597 | for (i = 0; i < sym_index; i++) |
| 598 | { |
| 599 | col = 0; |
| 600 | starting_col = 0; |
| 601 | |
| 602 | for (j = i; j < todo; j += sym_index) |
| 603 | { |
| 604 | sym = name_sorted_syms[j]; |
| 605 | |
| 606 | if (sym->cg.print_flag) |
| 607 | sprintf (buf, "[%d]", sym->cg.index); |
| 608 | else |
| 609 | sprintf (buf, "(%d)", sym->cg.index); |
| 610 | |
| 611 | if (j < nnames) |
| 612 | { |
| 613 | if (bsd_style_output) |
| 614 | { |
| 615 | printf ("%6.6s %-19.19s", buf, sym->name); |
| 616 | } |
| 617 | else |
| 618 | { |
| 619 | col += strlen (buf); |
| 620 | |
| 621 | for (; col < starting_col + 5; ++col) |
| 622 | putchar (' '); |
| 623 | |
| 624 | printf (" %s ", buf); |
| 625 | col += print_name_only (sym); |
| 626 | |
| 627 | if (!line_granularity && sym->is_static && sym->file) |
| 628 | { |
| 629 | filename = sym->file->name; |
| 630 | |
| 631 | if (!print_path) |
| 632 | { |
| 633 | filename = strrchr (filename, '/'); |
| 634 | |
| 635 | if (filename) |
| 636 | ++filename; |
| 637 | else |
| 638 | filename = sym->file->name; |
| 639 | } |
| 640 | |
| 641 | printf (" (%s)", filename); |
| 642 | col += strlen (filename) + 3; |
| 643 | } |
| 644 | } |
| 645 | } |
| 646 | else |
| 647 | { |
| 648 | if (bsd_style_output) |
| 649 | { |
| 650 | printf ("%6.6s ", buf); |
| 651 | sprintf (buf, _("<cycle %d>"), sym->cg.cyc.num); |
| 652 | printf ("%-19.19s", buf); |
| 653 | } |
| 654 | else |
| 655 | { |
| 656 | col += strlen (buf); |
| 657 | for (; col < starting_col + 5; ++col) |
| 658 | putchar (' '); |
| 659 | printf (" %s ", buf); |
| 660 | sprintf (buf, _("<cycle %d>"), sym->cg.cyc.num); |
| 661 | printf ("%s", buf); |
| 662 | col += strlen (buf); |
| 663 | } |
| 664 | } |
| 665 | |
| 666 | starting_col += column_width; |
| 667 | } |
| 668 | |
| 669 | printf ("\n"); |
| 670 | } |
| 671 | |
| 672 | free (name_sorted_syms); |
| 673 | } |
| 674 | |
| 675 | /* Compare two arcs based on their usage counts. |
| 676 | We want to sort in descending order. */ |
| 677 | |
| 678 | static int |
| 679 | cmp_arc_count (const PTR left, const PTR right) |
| 680 | { |
| 681 | const Arc **npp1 = (const Arc **) left; |
| 682 | const Arc **npp2 = (const Arc **) right; |
| 683 | |
| 684 | if ((*npp1)->count > (*npp2)->count) |
| 685 | return -1; |
| 686 | else if ((*npp1)->count < (*npp2)->count) |
| 687 | return 1; |
| 688 | else |
| 689 | return 0; |
| 690 | } |
| 691 | |
| 692 | /* Compare two funtions based on their usage counts. |
| 693 | We want to sort in descending order. */ |
| 694 | |
| 695 | static int |
| 696 | cmp_fun_nuses (const PTR left, const PTR right) |
| 697 | { |
| 698 | const Sym **npp1 = (const Sym **) left; |
| 699 | const Sym **npp2 = (const Sym **) right; |
| 700 | |
| 701 | if ((*npp1)->nuses > (*npp2)->nuses) |
| 702 | return -1; |
| 703 | else if ((*npp1)->nuses < (*npp2)->nuses) |
| 704 | return 1; |
| 705 | else |
| 706 | return 0; |
| 707 | } |
| 708 | |
| 709 | /* Print a suggested function ordering based on the profiling data. |
| 710 | |
| 711 | We perform 4 major steps when ordering functions: |
| 712 | |
| 713 | * Group unused functions together and place them at the |
| 714 | end of the function order. |
| 715 | |
| 716 | * Search the highest use arcs (those which account for 90% of |
| 717 | the total arc count) for functions which have several parents. |
| 718 | |
| 719 | Group those with the most call sites together (currently the |
| 720 | top 1.25% which have at least five different call sites). |
| 721 | |
| 722 | These are emitted at the start of the function order. |
| 723 | |
| 724 | * Use a greedy placement algorithm to place functions which |
| 725 | occur in the top 99% of the arcs in the profile. Some provisions |
| 726 | are made to handle high usage arcs where the parent and/or |
| 727 | child has already been placed. |
| 728 | |
| 729 | * Run the same greedy placement algorithm on the remaining |
| 730 | arcs to place the leftover functions. |
| 731 | |
| 732 | |
| 733 | The various "magic numbers" should (one day) be tuneable by command |
| 734 | line options. They were arrived at by benchmarking a few applications |
| 735 | with various values to see which values produced better overall function |
| 736 | orderings. |
| 737 | |
| 738 | Of course, profiling errors, machine limitations (PA long calls), and |
| 739 | poor cutoff values for the placement algorithm may limit the usefullness |
| 740 | of the resulting function order. Improvements would be greatly appreciated. |
| 741 | |
| 742 | Suggestions: |
| 743 | |
| 744 | * Place the functions with many callers near the middle of the |
| 745 | list to reduce long calls. |
| 746 | |
| 747 | * Propagate arc usage changes as functions are placed. Ie if |
| 748 | func1 and func2 are placed together, arcs to/from those arcs |
| 749 | to the same parent/child should be combined, then resort the |
| 750 | arcs to choose the next one. |
| 751 | |
| 752 | * Implement some global positioning algorithm to place the |
| 753 | chains made by the greedy local positioning algorithm. Probably |
| 754 | by examining arcs which haven't been placed yet to tie two |
| 755 | chains together. |
| 756 | |
| 757 | * Take a function's size and time into account in the algorithm; |
| 758 | size in particular is important on the PA (long calls). Placing |
| 759 | many small functions onto their own page may be wise. |
| 760 | |
| 761 | * Use better profiling information; many published algorithms |
| 762 | are based on call sequences through time, rather than just |
| 763 | arc counts. |
| 764 | |
| 765 | * Prodecure cloning could improve performance when a small number |
| 766 | of arcs account for most of the calls to a particular function. |
| 767 | |
| 768 | * Use relocation information to avoid moving unused functions |
| 769 | completely out of the code stream; this would avoid severe lossage |
| 770 | when the profile data bears little resemblance to actual runs. |
| 771 | |
| 772 | * Propagation of arc usages should also improve .o link line |
| 773 | ordering which shares the same arc placement algorithm with |
| 774 | the function ordering code (in fact it is a degenerate case |
| 775 | of function ordering). */ |
| 776 | |
| 777 | void |
| 778 | cg_print_function_ordering (void) |
| 779 | { |
| 780 | unsigned long sym_index; |
| 781 | unsigned long arc_index; |
| 782 | unsigned long used, unused, scratch_index; |
| 783 | unsigned long unplaced_arc_count, high_arc_count, scratch_arc_count; |
| 784 | #ifdef __GNUC__ |
| 785 | unsigned long long total_arcs, tmp_arcs_count; |
| 786 | #else |
| 787 | unsigned long total_arcs, tmp_arcs_count; |
| 788 | #endif |
| 789 | Sym **unused_syms, **used_syms, **scratch_syms; |
| 790 | Arc **unplaced_arcs, **high_arcs, **scratch_arcs; |
| 791 | |
| 792 | sym_index = 0; |
| 793 | used = 0; |
| 794 | unused = 0; |
| 795 | scratch_index = 0; |
| 796 | unplaced_arc_count = 0; |
| 797 | high_arc_count = 0; |
| 798 | scratch_arc_count = 0; |
| 799 | |
| 800 | /* First group all the unused functions together. */ |
| 801 | unused_syms = (Sym **) xmalloc (symtab.len * sizeof (Sym *)); |
| 802 | used_syms = (Sym **) xmalloc (symtab.len * sizeof (Sym *)); |
| 803 | scratch_syms = (Sym **) xmalloc (symtab.len * sizeof (Sym *)); |
| 804 | high_arcs = (Arc **) xmalloc (numarcs * sizeof (Arc *)); |
| 805 | scratch_arcs = (Arc **) xmalloc (numarcs * sizeof (Arc *)); |
| 806 | unplaced_arcs = (Arc **) xmalloc (numarcs * sizeof (Arc *)); |
| 807 | |
| 808 | /* Walk through all the functions; mark those which are never |
| 809 | called as placed (we'll emit them as a group later). */ |
| 810 | for (sym_index = 0, used = 0, unused = 0; sym_index < symtab.len; sym_index++) |
| 811 | { |
| 812 | if (symtab.base[sym_index].ncalls == 0) |
| 813 | { |
| 814 | unused_syms[unused++] = &symtab.base[sym_index]; |
| 815 | symtab.base[sym_index].has_been_placed = 1; |
| 816 | } |
| 817 | else |
| 818 | { |
| 819 | used_syms[used++] = &symtab.base[sym_index]; |
| 820 | symtab.base[sym_index].has_been_placed = 0; |
| 821 | symtab.base[sym_index].next = 0; |
| 822 | symtab.base[sym_index].prev = 0; |
| 823 | symtab.base[sym_index].nuses = 0; |
| 824 | } |
| 825 | } |
| 826 | |
| 827 | /* Sort the arcs from most used to least used. */ |
| 828 | qsort (arcs, numarcs, sizeof (Arc *), cmp_arc_count); |
| 829 | |
| 830 | /* Compute the total arc count. Also mark arcs as unplaced. |
| 831 | |
| 832 | Note we don't compensate for overflow if that happens! |
| 833 | Overflow is much less likely when this file is compiled |
| 834 | with GCC as it can double-wide integers via long long. */ |
| 835 | total_arcs = 0; |
| 836 | for (arc_index = 0; arc_index < numarcs; arc_index++) |
| 837 | { |
| 838 | total_arcs += arcs[arc_index]->count; |
| 839 | arcs[arc_index]->has_been_placed = 0; |
| 840 | } |
| 841 | |
| 842 | /* We want to pull out those functions which are referenced |
| 843 | by many highly used arcs and emit them as a group. This |
| 844 | could probably use some tuning. */ |
| 845 | tmp_arcs_count = 0; |
| 846 | for (arc_index = 0; arc_index < numarcs; arc_index++) |
| 847 | { |
| 848 | tmp_arcs_count += arcs[arc_index]->count; |
| 849 | |
| 850 | /* Count how many times each parent and child are used up |
| 851 | to our threshhold of arcs (90%). */ |
| 852 | if ((double)tmp_arcs_count / (double)total_arcs > 0.90) |
| 853 | break; |
| 854 | |
| 855 | arcs[arc_index]->child->nuses++; |
| 856 | } |
| 857 | |
| 858 | /* Now sort a temporary symbol table based on the number of |
| 859 | times each function was used in the highest used arcs. */ |
| 860 | memcpy (scratch_syms, used_syms, used * sizeof (Sym *)); |
| 861 | qsort (scratch_syms, used, sizeof (Sym *), cmp_fun_nuses); |
| 862 | |
| 863 | /* Now pick out those symbols we're going to emit as |
| 864 | a group. We take up to 1.25% of the used symbols. */ |
| 865 | for (sym_index = 0; sym_index < used / 80; sym_index++) |
| 866 | { |
| 867 | Sym *sym = scratch_syms[sym_index]; |
| 868 | Arc *arc; |
| 869 | |
| 870 | /* If we hit symbols that aren't used from many call sites, |
| 871 | then we can quit. We choose five as the low limit for |
| 872 | no particular reason. */ |
| 873 | if (sym->nuses == 5) |
| 874 | break; |
| 875 | |
| 876 | /* We're going to need the arcs between these functions. |
| 877 | Unfortunately, we don't know all these functions |
| 878 | until we're done. So we keep track of all the arcs |
| 879 | to the functions we care about, then prune out those |
| 880 | which are uninteresting. |
| 881 | |
| 882 | An interesting variation would be to quit when we found |
| 883 | multi-call site functions which account for some percentage |
| 884 | of the arcs. */ |
| 885 | arc = sym->cg.children; |
| 886 | |
| 887 | while (arc) |
| 888 | { |
| 889 | if (arc->parent != arc->child) |
| 890 | scratch_arcs[scratch_arc_count++] = arc; |
| 891 | arc->has_been_placed = 1; |
| 892 | arc = arc->next_child; |
| 893 | } |
| 894 | |
| 895 | arc = sym->cg.parents; |
| 896 | |
| 897 | while (arc) |
| 898 | { |
| 899 | if (arc->parent != arc->child) |
| 900 | scratch_arcs[scratch_arc_count++] = arc; |
| 901 | arc->has_been_placed = 1; |
| 902 | arc = arc->next_parent; |
| 903 | } |
| 904 | |
| 905 | /* Keep track of how many symbols we're going to place. */ |
| 906 | scratch_index = sym_index; |
| 907 | |
| 908 | /* A lie, but it makes identifying |
| 909 | these functions easier later. */ |
| 910 | sym->has_been_placed = 1; |
| 911 | } |
| 912 | |
| 913 | /* Now walk through the temporary arcs and copy |
| 914 | those we care about into the high arcs array. */ |
| 915 | for (arc_index = 0; arc_index < scratch_arc_count; arc_index++) |
| 916 | { |
| 917 | Arc *arc = scratch_arcs[arc_index]; |
| 918 | |
| 919 | /* If this arc refers to highly used functions, then |
| 920 | then we want to keep it. */ |
| 921 | if (arc->child->has_been_placed |
| 922 | && arc->parent->has_been_placed) |
| 923 | { |
| 924 | high_arcs[high_arc_count++] = scratch_arcs[arc_index]; |
| 925 | |
| 926 | /* We need to turn of has_been_placed since we're going to |
| 927 | use the main arc placement algorithm on these arcs. */ |
| 928 | arc->child->has_been_placed = 0; |
| 929 | arc->parent->has_been_placed = 0; |
| 930 | } |
| 931 | } |
| 932 | |
| 933 | /* Dump the multi-site high usage functions which are not |
| 934 | going to be ordered by the main ordering algorithm. */ |
| 935 | for (sym_index = 0; sym_index < scratch_index; sym_index++) |
| 936 | { |
| 937 | if (scratch_syms[sym_index]->has_been_placed) |
| 938 | printf ("%s\n", scratch_syms[sym_index]->name); |
| 939 | } |
| 940 | |
| 941 | /* Now we can order the multi-site high use |
| 942 | functions based on the arcs between them. */ |
| 943 | qsort (high_arcs, high_arc_count, sizeof (Arc *), cmp_arc_count); |
| 944 | order_and_dump_functions_by_arcs (high_arcs, high_arc_count, 1, |
| 945 | unplaced_arcs, &unplaced_arc_count); |
| 946 | |
| 947 | /* Order and dump the high use functions left, |
| 948 | these typically have only a few call sites. */ |
| 949 | order_and_dump_functions_by_arcs (arcs, numarcs, 0, |
| 950 | unplaced_arcs, &unplaced_arc_count); |
| 951 | |
| 952 | /* Now place the rarely used functions. */ |
| 953 | order_and_dump_functions_by_arcs (unplaced_arcs, unplaced_arc_count, 1, |
| 954 | scratch_arcs, &scratch_arc_count); |
| 955 | |
| 956 | /* Output any functions not emitted by the order_and_dump calls. */ |
| 957 | for (sym_index = 0; sym_index < used; sym_index++) |
| 958 | if (used_syms[sym_index]->has_been_placed == 0) |
| 959 | printf("%s\n", used_syms[sym_index]->name); |
| 960 | |
| 961 | /* Output the unused functions. */ |
| 962 | for (sym_index = 0; sym_index < unused; sym_index++) |
| 963 | printf("%s\n", unused_syms[sym_index]->name); |
| 964 | |
| 965 | unused_syms = (Sym **) xmalloc (symtab.len * sizeof (Sym *)); |
| 966 | used_syms = (Sym **) xmalloc (symtab.len * sizeof (Sym *)); |
| 967 | scratch_syms = (Sym **) xmalloc (symtab.len * sizeof (Sym *)); |
| 968 | high_arcs = (Arc **) xmalloc (numarcs * sizeof (Arc *)); |
| 969 | scratch_arcs = (Arc **) xmalloc (numarcs * sizeof (Arc *)); |
| 970 | unplaced_arcs = (Arc **) xmalloc (numarcs * sizeof (Arc *)); |
| 971 | |
| 972 | free (unused_syms); |
| 973 | free (used_syms); |
| 974 | free (scratch_syms); |
| 975 | free (high_arcs); |
| 976 | free (scratch_arcs); |
| 977 | free (unplaced_arcs); |
| 978 | } |
| 979 | |
| 980 | /* Place functions based on the arcs in THE_ARCS with ARC_COUNT entries; |
| 981 | place unused arcs into UNPLACED_ARCS/UNPLACED_ARC_COUNT. |
| 982 | |
| 983 | If ALL is nonzero, then place all functions referenced by THE_ARCS, |
| 984 | else only place those referenced in the top 99% of the arcs in THE_ARCS. */ |
| 985 | |
| 986 | #define MOST 0.99 |
| 987 | static void |
| 988 | order_and_dump_functions_by_arcs (the_arcs, arc_count, all, |
| 989 | unplaced_arcs, unplaced_arc_count) |
| 990 | Arc **the_arcs; |
| 991 | unsigned long arc_count; |
| 992 | int all; |
| 993 | Arc **unplaced_arcs; |
| 994 | unsigned long *unplaced_arc_count; |
| 995 | { |
| 996 | #ifdef __GNUC__ |
| 997 | unsigned long long tmp_arcs, total_arcs; |
| 998 | #else |
| 999 | unsigned long tmp_arcs, total_arcs; |
| 1000 | #endif |
| 1001 | unsigned int arc_index; |
| 1002 | |
| 1003 | /* If needed, compute the total arc count. |
| 1004 | |
| 1005 | Note we don't compensate for overflow if that happens! */ |
| 1006 | if (! all) |
| 1007 | { |
| 1008 | total_arcs = 0; |
| 1009 | for (arc_index = 0; arc_index < arc_count; arc_index++) |
| 1010 | total_arcs += the_arcs[arc_index]->count; |
| 1011 | } |
| 1012 | else |
| 1013 | total_arcs = 0; |
| 1014 | |
| 1015 | tmp_arcs = 0; |
| 1016 | |
| 1017 | for (arc_index = 0; arc_index < arc_count; arc_index++) |
| 1018 | { |
| 1019 | Sym *sym1, *sym2; |
| 1020 | Sym *child, *parent; |
| 1021 | |
| 1022 | tmp_arcs += the_arcs[arc_index]->count; |
| 1023 | |
| 1024 | /* Ignore this arc if it's already been placed. */ |
| 1025 | if (the_arcs[arc_index]->has_been_placed) |
| 1026 | continue; |
| 1027 | |
| 1028 | child = the_arcs[arc_index]->child; |
| 1029 | parent = the_arcs[arc_index]->parent; |
| 1030 | |
| 1031 | /* If we're not using all arcs, and this is a rarely used |
| 1032 | arc, then put it on the unplaced_arc list. Similarly |
| 1033 | if both the parent and child of this arc have been placed. */ |
| 1034 | if ((! all && (double)tmp_arcs / (double)total_arcs > MOST) |
| 1035 | || child->has_been_placed || parent->has_been_placed) |
| 1036 | { |
| 1037 | unplaced_arcs[(*unplaced_arc_count)++] = the_arcs[arc_index]; |
| 1038 | continue; |
| 1039 | } |
| 1040 | |
| 1041 | /* If all slots in the parent and child are full, then there isn't |
| 1042 | anything we can do right now. We'll place this arc on the |
| 1043 | unplaced arc list in the hope that a global positioning |
| 1044 | algorithm can use it to place function chains. */ |
| 1045 | if (parent->next && parent->prev && child->next && child->prev) |
| 1046 | { |
| 1047 | unplaced_arcs[(*unplaced_arc_count)++] = the_arcs[arc_index]; |
| 1048 | continue; |
| 1049 | } |
| 1050 | |
| 1051 | /* If the parent is unattached, then find the closest |
| 1052 | place to attach it onto child's chain. Similarly |
| 1053 | for the opposite case. */ |
| 1054 | if (!parent->next && !parent->prev) |
| 1055 | { |
| 1056 | int next_count = 0; |
| 1057 | int prev_count = 0; |
| 1058 | Sym *prev = child; |
| 1059 | Sym *next = child; |
| 1060 | |
| 1061 | /* Walk to the beginning and end of the child's chain. */ |
| 1062 | while (next->next) |
| 1063 | { |
| 1064 | next = next->next; |
| 1065 | next_count++; |
| 1066 | } |
| 1067 | |
| 1068 | while (prev->prev) |
| 1069 | { |
| 1070 | prev = prev->prev; |
| 1071 | prev_count++; |
| 1072 | } |
| 1073 | |
| 1074 | /* Choose the closest. */ |
| 1075 | child = next_count < prev_count ? next : prev; |
| 1076 | } |
| 1077 | else if (! child->next && !child->prev) |
| 1078 | { |
| 1079 | int next_count = 0; |
| 1080 | int prev_count = 0; |
| 1081 | Sym *prev = parent; |
| 1082 | Sym *next = parent; |
| 1083 | |
| 1084 | while (next->next) |
| 1085 | { |
| 1086 | next = next->next; |
| 1087 | next_count++; |
| 1088 | } |
| 1089 | |
| 1090 | while (prev->prev) |
| 1091 | { |
| 1092 | prev = prev->prev; |
| 1093 | prev_count++; |
| 1094 | } |
| 1095 | |
| 1096 | parent = prev_count < next_count ? prev : next; |
| 1097 | } |
| 1098 | else |
| 1099 | { |
| 1100 | /* Couldn't find anywhere to attach the functions, |
| 1101 | put the arc on the unplaced arc list. */ |
| 1102 | unplaced_arcs[(*unplaced_arc_count)++] = the_arcs[arc_index]; |
| 1103 | continue; |
| 1104 | } |
| 1105 | |
| 1106 | /* Make sure we don't tie two ends together. */ |
| 1107 | sym1 = parent; |
| 1108 | if (sym1->next) |
| 1109 | while (sym1->next) |
| 1110 | sym1 = sym1->next; |
| 1111 | else |
| 1112 | while (sym1->prev) |
| 1113 | sym1 = sym1->prev; |
| 1114 | |
| 1115 | sym2 = child; |
| 1116 | if (sym2->next) |
| 1117 | while (sym2->next) |
| 1118 | sym2 = sym2->next; |
| 1119 | else |
| 1120 | while (sym2->prev) |
| 1121 | sym2 = sym2->prev; |
| 1122 | |
| 1123 | if (sym1 == child |
| 1124 | && sym2 == parent) |
| 1125 | { |
| 1126 | /* This would tie two ends together. */ |
| 1127 | unplaced_arcs[(*unplaced_arc_count)++] = the_arcs[arc_index]; |
| 1128 | continue; |
| 1129 | } |
| 1130 | |
| 1131 | if (parent->next) |
| 1132 | { |
| 1133 | /* Must attach to the parent's prev field. */ |
| 1134 | if (! child->next) |
| 1135 | { |
| 1136 | /* parent-prev and child-next */ |
| 1137 | parent->prev = child; |
| 1138 | child->next = parent; |
| 1139 | the_arcs[arc_index]->has_been_placed = 1; |
| 1140 | } |
| 1141 | } |
| 1142 | else if (parent->prev) |
| 1143 | { |
| 1144 | /* Must attach to the parent's next field. */ |
| 1145 | if (! child->prev) |
| 1146 | { |
| 1147 | /* parent-next and child-prev */ |
| 1148 | parent->next = child; |
| 1149 | child->prev = parent; |
| 1150 | the_arcs[arc_index]->has_been_placed = 1; |
| 1151 | } |
| 1152 | } |
| 1153 | else |
| 1154 | { |
| 1155 | /* Can attach to either field in the parent, depends |
| 1156 | on where we've got space in the child. */ |
| 1157 | if (child->prev) |
| 1158 | { |
| 1159 | /* parent-prev and child-next. */ |
| 1160 | parent->prev = child; |
| 1161 | child->next = parent; |
| 1162 | the_arcs[arc_index]->has_been_placed = 1; |
| 1163 | } |
| 1164 | else |
| 1165 | { |
| 1166 | /* parent-next and child-prev. */ |
| 1167 | parent->next = child; |
| 1168 | child->prev = parent; |
| 1169 | the_arcs[arc_index]->has_been_placed = 1; |
| 1170 | } |
| 1171 | } |
| 1172 | } |
| 1173 | |
| 1174 | /* Dump the chains of functions we've made. */ |
| 1175 | for (arc_index = 0; arc_index < arc_count; arc_index++) |
| 1176 | { |
| 1177 | Sym *sym; |
| 1178 | if (the_arcs[arc_index]->parent->has_been_placed |
| 1179 | || the_arcs[arc_index]->child->has_been_placed) |
| 1180 | continue; |
| 1181 | |
| 1182 | sym = the_arcs[arc_index]->parent; |
| 1183 | |
| 1184 | /* If this symbol isn't attached to any other |
| 1185 | symbols, then we've got a rarely used arc. |
| 1186 | |
| 1187 | Skip it for now, we'll deal with them later. */ |
| 1188 | if (sym->next == NULL |
| 1189 | && sym->prev == NULL) |
| 1190 | continue; |
| 1191 | |
| 1192 | /* Get to the start of this chain. */ |
| 1193 | while (sym->prev) |
| 1194 | sym = sym->prev; |
| 1195 | |
| 1196 | while (sym) |
| 1197 | { |
| 1198 | /* Mark it as placed. */ |
| 1199 | sym->has_been_placed = 1; |
| 1200 | printf ("%s\n", sym->name); |
| 1201 | sym = sym->next; |
| 1202 | } |
| 1203 | } |
| 1204 | |
| 1205 | /* If we want to place all the arcs, then output |
| 1206 | those which weren't placed by the main algorithm. */ |
| 1207 | if (all) |
| 1208 | for (arc_index = 0; arc_index < arc_count; arc_index++) |
| 1209 | { |
| 1210 | Sym *sym; |
| 1211 | if (the_arcs[arc_index]->parent->has_been_placed |
| 1212 | || the_arcs[arc_index]->child->has_been_placed) |
| 1213 | continue; |
| 1214 | |
| 1215 | sym = the_arcs[arc_index]->parent; |
| 1216 | |
| 1217 | sym->has_been_placed = 1; |
| 1218 | printf ("%s\n", sym->name); |
| 1219 | } |
| 1220 | } |
| 1221 | |
| 1222 | /* Compare two function_map structs based on file name. |
| 1223 | We want to sort in ascending order. */ |
| 1224 | |
| 1225 | static int |
| 1226 | cmp_symbol_map (const void * l, const void * r) |
| 1227 | { |
| 1228 | return filename_cmp (((struct function_map *) l)->file_name, |
| 1229 | ((struct function_map *) r)->file_name); |
| 1230 | } |
| 1231 | |
| 1232 | /* Print a suggested .o ordering for files on a link line based |
| 1233 | on profiling information. This uses the function placement |
| 1234 | code for the bulk of its work. */ |
| 1235 | |
| 1236 | void |
| 1237 | cg_print_file_ordering (void) |
| 1238 | { |
| 1239 | unsigned long scratch_arc_count; |
| 1240 | unsigned long arc_index; |
| 1241 | unsigned long sym_index; |
| 1242 | Arc **scratch_arcs; |
| 1243 | char *last; |
| 1244 | |
| 1245 | scratch_arc_count = 0; |
| 1246 | |
| 1247 | scratch_arcs = (Arc **) xmalloc (numarcs * sizeof (Arc *)); |
| 1248 | for (arc_index = 0; arc_index < numarcs; arc_index++) |
| 1249 | { |
| 1250 | if (! arcs[arc_index]->parent->mapped |
| 1251 | || ! arcs[arc_index]->child->mapped) |
| 1252 | arcs[arc_index]->has_been_placed = 1; |
| 1253 | } |
| 1254 | |
| 1255 | order_and_dump_functions_by_arcs (arcs, numarcs, 0, |
| 1256 | scratch_arcs, &scratch_arc_count); |
| 1257 | |
| 1258 | /* Output .o's not handled by the main placement algorithm. */ |
| 1259 | for (sym_index = 0; sym_index < symtab.len; sym_index++) |
| 1260 | { |
| 1261 | if (symtab.base[sym_index].mapped |
| 1262 | && ! symtab.base[sym_index].has_been_placed) |
| 1263 | printf ("%s\n", symtab.base[sym_index].name); |
| 1264 | } |
| 1265 | |
| 1266 | qsort (symbol_map, symbol_map_count, sizeof (struct function_map), cmp_symbol_map); |
| 1267 | |
| 1268 | /* Now output any .o's that didn't have any text symbols. */ |
| 1269 | last = NULL; |
| 1270 | for (sym_index = 0; sym_index < symbol_map_count; sym_index++) |
| 1271 | { |
| 1272 | unsigned int index2; |
| 1273 | |
| 1274 | /* Don't bother searching if this symbol |
| 1275 | is the same as the previous one. */ |
| 1276 | if (last && !filename_cmp (last, symbol_map[sym_index].file_name)) |
| 1277 | continue; |
| 1278 | |
| 1279 | for (index2 = 0; index2 < symtab.len; index2++) |
| 1280 | { |
| 1281 | if (! symtab.base[index2].mapped) |
| 1282 | continue; |
| 1283 | |
| 1284 | if (!filename_cmp (symtab.base[index2].name, |
| 1285 | symbol_map[sym_index].file_name)) |
| 1286 | break; |
| 1287 | } |
| 1288 | |
| 1289 | /* If we didn't find it in the symbol table, then it must |
| 1290 | be a .o with no text symbols. Output it last. */ |
| 1291 | if (index2 == symtab.len) |
| 1292 | printf ("%s\n", symbol_map[sym_index].file_name); |
| 1293 | last = symbol_map[sym_index].file_name; |
| 1294 | } |
| 1295 | } |