docs/internals/3_0_BUGSTATUS.txt

   1
   2 nb: "n-i-bz" == "not in Bugzilla"
   3
   4 ========================================================================
   5 === Bugs targeted for 3.1.0 only                                     ===
   6 ========================================================================
   7
   8 ----------------------------------------------------------------
   9 109861  amd64 hangs at startup
  10 110301  ditto
  11 111554  valgrind crashes with Cannot allocate memory
  12 111809  Memcheck tool doesn't start java
  13 111901  cross-platform run of cachegrind fails on opteron
  14 113468  (vgPlain_mprotect_range): Assertion 'r != -1' failed.
  15  92071  Reading debugging info uses too much memory
  16 109744  memcheck loses track of mmap from direct ld-linux.so.2
  17 110183  tail of page with _end
  18  82301  FV memory layout too rigid
  19  98278  Infinite recursion possible when allocating memory
  20 108994  Valgrind runs out of memory due to 133x overhead
  21 115643  valgrind cannot allocate memory
  22
  23 Will fix in 3.1.  Long delay seems to be caused by amd64-Gentoo kernel
  24 not liking large mmap/munmap requests.  Other bugs also look like
  25 aspacem problems.
  26
  27 FIXED-TRUNK:    now done (many many commits)
  28
  29 ----------------------------------------------------------------
  30 105227  The BOUND instruction is not implemented (x86, with test case)
  31
  32 FIXED-TRUNK:    TODO ?
  33
  34 ----------------------------------------------------------------
  35 105974  vg_hashtable.c static hash table
  36
  37 FIXED-TRUNK:    vg:???
  38
  39 ----------------------------------------------------------------
  40 109323  ppc32: dispatch.S uses Altivec insn, which doesn't work on POWER.
  41
  42 FIXED-TRUNK:    4636
  43
  44 ----------------------------------------------------------------
  45 109345  ptrace_setregs not yet implemented for ppc
  46
  47 FIXED-TRUNK:    vg:5046
  48
  49 ----------------------------------------------------------------
  50 110204 fmemopen false +ve
  51
  52 Seems low priority.
  53
  54 FIXED-TRUNK:    TODO?
  55
  56 ----------------------------------------------------------------
  57 110205 sigcancel unwind fails
  58 114629 == (TENTATIVE)
  59
  60 Tom is considering this.  It would be nice to fix it for 3.1 but
  61 status currently unclear.
  62
  63 FIXED-TRUNK:    vex:1320 - vex impl of sysenter
  64                 vg:4337 - minimal Valgrind-side; does not do anything
  65
  66 ----------------------------------------------------------------
  67 110831 Would like to be able to run against both 32 and 64 bit
  68        binaries on AMD64
  69 110829 ==
  70
  71 FIXED-TRUNK:    many commits (vg:5031 ?)
  72
  73 ----------------------------------------------------------------
  74 111364 False report of "definitly lost" memory
  75
  76 Unclear what to do about this .. leak checker strangeness.
  77
  78 ----------------------------------------------------------------
  79 n-i-bz  Give more info about seginfo dropping.
  80
  81 FIXED-TRUNK:    vg:4425
  82
  83 ----------------------------------------------------------------
  84 111855  default suppression file is read 1 byte at a time
  85
  86 Perhaps worth a look.
  87
  88 FIXED-TRUNK:    TODO
  89
  90 ----------------------------------------------------------------
  91 111781  compile of valgrind-3.0.0 fails on my linux (gcc 2.X prob)
  92
  93 FIXED-TRUNK:    fixed (multiple commits)
  94
  95 ----------------------------------------------------------------
  96 112163  MASSIF crashed with  signal 7 (SIGBUS) after running 2 days
  97
  98 FIXED-TRUNK:    unconfirmed (insufficient info from reporter)
  99
 100 ----------------------------------------------------------------
 101 112670  Cachegrind: cg_main.c:486 (handleOneStatement ...
 102
 103 FIXED-TRUNK:    fixed (many commits)
 104
 105 ----------------------------------------------------------------
 106 112941  vex x86: 0xD9 0xF4 (fxtract)
 107 110201  ==
 108
 109 FIXED-TRUNK:    vex:1405
 110
 111 ----------------------------------------------------------------
 112 113015  vex amd64->IR: 0xE3 0x14 0x48 0x83 (jrcxz)
 113
 114 FIXED-TRUNK:    vex:1413
 115
 116 ----------------------------------------------------------------
 117 113126  Crash with binaries built with -gstabs+/-ggdb
 118 104065  ==
 119 115741  ==
 120
 121 FIXED-TRUNK:    vg:5138
 122
 123 ----------------------------------------------------------------
 124 113403  Partial SSE3 support on x86
 125
 126 FIXED-TRUNK:    vex:???
 127
 128 ----------------------------------------------------------------
 129 113541  vex: the `impossible' happened: Grp5(x86) (alt encoding inc/dec)
 130         case 1
 131 FIXED-TRUNK:    vex:1412
 132
 133 ----------------------------------------------------------------
 134 113642  New: valgrind crashes when trying to read debug information
 135
 136 FIXED-TRUNK:    vg:4856
 137
 138 ----------------------------------------------------------------
 139 113810  priv/guest-x86/toIR.c:7964 (disInstr_X86_WRK): Assertion `sz == 4'
 140         Inferred 66 0F F6 (66 + PSADBW == SSE PSADBW)
 141
 142 FIXED-TRUNK:    vex:1410, test in valgrind:4851
 143
 144 ----------------------------------------------------------------
 145 113796  read() and write() do not work if buffer is in shared memory
 146
 147 Although the underlying cause is still present in the 3.0 code
 148 this bug is only user visible in the 2.4 code base.
 149
 150 FIXED-TRUNK:    vg:4852
 151
 152 ----------------------------------------------------------------
 153 113851  vex x86->IR: (pmaddwd): 0x66 0xF 0xF5 0xC7
 154
 155 FIXED-TRUNK:    vex:1411, test in valgrind:4859
 156
 157 ----------------------------------------------------------------
 158 114366  New: vex amd64 cannnot handle __asm__( "fninit" )
 159
 160 FIXED-TRUNK:    vex:1440
 161
 162 ----------------------------------------------------------------
 163 114412  vex amd64->IR: 0xF 0xAD 0xC2 0xD3 (128-bit shift, shrdq?)
 164
 165 FIXED-TRUNK:    vex:1435
 166
 167 ----------------------------------------------------------------
 168 114455  vex amd64->IR: 0xF 0xAC 0xD0 0x1 (also shrdq)
 169
 170 FIXED-TRUNK:    vex:1436
 171
 172 ----------------------------------------------------------------
 173 115590: amd64->IR: 0x67 0xE3 0x9 0xEB (address size override)
 174
 175 FIXED-TRUNK:    vex:1433
 176
 177 ----------------------------------------------------------------
 178 115953  valgrind svn r5042 does not build with parallel make (-j3)
 179
 180 FIXED-TRUNK:    vg:????
 181
 182 ----------------------------------------------------------------
 183 116057  New: valgrind maximum instruction size - VG_MAX_INSTR_SZB too
 184         small?
 185
 186 FIXED-TRUNK:    vg:5072
 187
 188 ----------------------------------------------------------------
 189 116483  shmat failes with invalid argument when trying to attach a shm segment
 190
 191 FIXED-TRUNK:    fixed by introduction of SkShmC during aspacem rewrite
 192
 193 ========================================================================
 194 === Bugs targeted for 3.1.0 and 3.0.2                                ===
 195 ========================================================================
 196
 197 ----------------------------------------------------------------
 198 102202 valgrind crashes when realloc'ing until out of memory
 199 109487 ==
 200 110536 ==
 201 112687 ==
 202
 203 FIXED-TRUNK:    4875
 204 FIXED-30BRANCH: 4876
 205
 206 ----------------------------------------------------------------
 207 110209 --show-emwarns misses some
 208
 209 Tom says: The math/test-fenv.c file in the glibc source is the code in
 210 question and I can reproduce it with that code.
 211
 212 FIXED-TRUNK:    TODO?
 213 FIXED-30BRANCH: TODO?
 214
 215 ----------------------------------------------------------------
 216 110770  VEX: Generated files not always updated when making valgrind
 217
 218 FIXED-TRUNK:    TODO... partial(vg:4473)
 219 FIXED-30BRANCH: TODO
 220
 221 ----------------------------------------------------------------
 222 n-i-bz  Jeroen's XML-to-text FAQ.xml translator
 223
 224 FIXED-TRUNK:    vg:4830
 225 FIXED-30BRANCH: TODO
 226
 227 ----------------------------------------------------------------
 228 111724  vex amd64->IR: unhandled instruction bytes: 0x41 0xF 0xAB
 229 (more BT{,S,R,C} fun n games)
 230 Also 0xF 0xBB 0x10 0x44
 231
 232 FIXED-TRUNK:    vex:1414
 233 FIXED-30BRANCH: TODO
 234
 235 ----------------------------------------------------------------
 236 n-i-bz  Print a more user-friendly message when vex bombs out
 237         with unhandled instruction bytes
 238
 239 FIXED-TRUNK:    vg:4817,4932
 240 FIXED-30BRANCH: TODO
 241
 242 ----------------------------------------------------------------
 243 111748  vex amd64->IR: unhandled instruction bytes: fucom
 244         (0xDD 0xE2 0xDF 0xE0)
 245
 246 FIXED-TRUNK:    vex:1415
 247 FIXED-30BRANCH: TODO
 248
 249 ----------------------------------------------------------------
 250 111785  make fails if CC contains spaces
 251
 252 FIXED-TRUNK:    4589, 4592
 253 FIXED-30BRANCH: 4597, 4601
 254
 255 ----------------------------------------------------------------
 256 111829  vex x86->IR: unhandled instruction bytes: sbb Al, Ib
 257
 258 FIXED-TRUNK:    vex:1406
 259 FIXED-30BRANCH: TODO
 260
 261 ----------------------------------------------------------------
 262 111851  vex x86->IR: unhandled instruction bytes: 0x9F 0x89
 263         (lahf/sahf)
 264
 265 FIXED-TRUNK:    vex:1409
 266 FIXED-30BRANCH: TODO
 267
 268 ----------------------------------------------------------------
 269 112031  iopl on AMD64 and README_MISSING_SYSCALL_OR_IOCTL update
 270
 271 FIXED-TRUNK:    4826, 4864
 272 FIXED-30BRANCH: 4862, 4865
 273
 274 ----------------------------------------------------------------
 275 112152  code generation for Xin_MFence on x86 with SSE0 subarch
 276 112167  ==
 277 112789  ==
 278
 279 FIXED-TRUNK:    vex:1407
 280 FIXED-30BRANCH: TODO
 281
 282 ----------------------------------------------------------------
 283 112199  naked ar tool is used in vex makefile
 284
 285 FIXED-TRUNK:    vex:1397
 286 FIXED-30BRANCH: TODO
 287
 288 ----------------------------------------------------------------
 289 112501  vex x86->IR: movq (0xF 0x7F 0xC1 0xF) (mmx MOVQ)
 290 113583  ==
 291
 292 FIXED-TRUNK:    vex:1408
 293 FIXED-30BRANCH: TODO
 294
 295 ----------------------------------------------------------------
 296 112538  memalign crash
 297
 298 FIXED-TRUNK:    vg:4879
 299 FIXED-30BRANCH: vg:4880
 300
 301 ----------------------------------------------------------------
 302 113190  Broken links in docs/html/
 303
 304 FIXED-TRUNK:    vg:4778
 305 FIXED-30BRANCH: TODO
 306
 307 ----------------------------------------------------------------
 308 113230  Valgrind sys_pipe on x86-64 wrongly thinks file descriptors
 309         should be 64bit
 310
 311 FIXED-TRUNK:    vg:4669
 312 FIXED-30BRANCH: TODO
 313
 314 ----------------------------------------------------------------
 315 n-i-bz  Cachegrind shows incorrect miss rates when counts are
 316         greater than 32 bits
 317
 318 FIXED-TRUNK:    vg:4769
 319 FIXED-30BRANCH: TODO
 320
 321 ----------------------------------------------------------------
 322 113996  vex amd64->IR: fucomp (0xDD 0xE9 0xDF 0xE0)
 323
 324 FIXED-TRUNK:    vex:1437
 325 FIXED-30BRANCH: TODO
 326
 327 ----------------------------------------------------------------
 328 114196  vex x86->IR: out %eax,(%dx) (0xEF 0xC9 0xC3 0x90)
 329
 330 FIXED-TRUNK:    vex:1425
 331 FIXED-30BRANCH: TODO
 332 (has good test case)
 333
 334 ----------------------------------------------------------------
 335 114250  context record in signal handler contains incorrect values
 336
 337 FIXED-TRUNK:    TODO
 338 FIXED-30BRANCH: TODO
 339 (has good test case)
 340
 341 ----------------------------------------------------------------
 342 114289  Memcheck fails to intercept malloc when used in an uclibc environment
 343
 344 FIXED-TRUNK:    vg:4916
 345 FIXED-30BRANCH: TODO
 346
 347 ----------------------------------------------------------------
 348 114756  mbind syscall support
 349
 350 FIXED-TRUNK:    vg:4958
 351 FIXED-30BRANCH: TODO
 352
 353 ----------------------------------------------------------------
 354 114757  Valgrind dies with assertion: Assertion 'noLargerThan > 0' failed
 355
 356 FIXED-TRUNK:    vg:4960
 357 FIXED-30BRANCH: TODO
 358
 359 ----------------------------------------------------------------
 360 114563  stack tracking module not informed when valgrind switches threads
 361
 362 FIXED-TRUNK:    vg:5070
 363 FIXED-30BRANCH: TODO
 364
 365 ----------------------------------------------------------------
 366 114564: clone() and stacks
 367 114565  ==
 368
 369 FIXED-TRUNK:    vg:5070
 370
 371 ----------------------------------------------------------------
 372 115496  glibc crashes trying to use sysinfo page
 373
 374 FIXED-TRUNK:    vg:5079
 375 FIXED-30BRANCH: TODO
 376
 377 ----------------------------------------------------------------
 378 116200  enable fsetxattr, fgetxattr, and fremovexattr for amd64
 379
 380 FIXED-TRUNK:    vg:5106
 381 FIXED-30BRANCH: TODO
 382
 383
 384 ========================================================================
 385 === Bugs targeted for 3.1.0 and 3.0.1 (all done, 3.0.1 released)     ===
 386 ========================================================================
 387
 388 ----------------------------------------------------------------
 389 101204  noisy warning
 390
 391 FIXED-TRUNK:    vg:4511
 392 FIXED-30BRANCH: vg:4561
 393
 394 ----------------------------------------------------------------
 395 109313 x86 cmpxchg8b
 396
 397 FIXED-TRUNK:    vex:1331, vg:4390 contains regtest
 398                       + mistaken commit of this file)
 399 FIXED-30BRANCH: vex:1337
 400
 401 ----------------------------------------------------------------
 402 110102 dis_op2_E_G(amd64)
 403
 404 FIXED-TRUNK:    vex:1318
 405 FIXED-30BRANCH: vex:1325
 406
 407 ----------------------------------------------------------------
 408 110202 x86 sys_waitpid(#286)
 409
 410 FIXED-TRUNK:    vg:4329
 411 FIXED-30BRANCH: vg:4332
 412
 413 ----------------------------------------------------------------
 414 110203 clock_getres(,0)
 415
 416 FIXED-TRUNK:    vg:4328
 417 FIXED-30BRANCH: vg:4332
 418
 419 ----------------------------------------------------------------
 420 110208 execve fail wrong retval
 421
 422 FIXED-TRUNK:    vg:4330
 423 FIXED-30BRANCH: vg:4332
 424
 425 ----------------------------------------------------------------
 426 110274 SSE1 now mandatory for x86
 427 111739 ==
 428
 429 FIXED-TRUNK:    vex:1321, vg:4339
 430 FIXED-30BRANCH: vex:1327, vg:4374
 431
 432 ----------------------------------------------------------------
 433 110388  amd64 0xDD 0xD1
 434
 435 FIXED-TRUNK:    vex:1322
 436 FIXED-30BRANCH: vex:1328
 437
 438 ----------------------------------------------------------------
 439 110464 amd64 0xDC 0x1D FCOMP
 440
 441 FIXED-TRUNK:    vex:1323
 442 FIXED-30BRANCH: vex:1329
 443
 444 ----------------------------------------------------------------
 445 110478 amd64 0xF 0xD PREFETCH
 446
 447 FIXED-TRUNK:    vex:1324
 448 FIXED-30BRANCH: vex:1330
 449
 450 ----------------------------------------------------------------
 451 110591 amd64: rdtsc not implemented properly
 452
 453 (Also afflicts x86)
 454
 455 FIXED-TRUNK:    vex:1344 (x86), vex:1346 (amd64).
 456 FIXED-30BRANCH: vex:1354 (x86), vex:1355 (amd64).
 457
 458 ----------------------------------------------------------------
 459 110652  AMD64 valgrind crashes on cwtd instruction
 460
 461 FIXED-TRUNK:    vex:1333
 462 FIXED-30BRANCH: vex:1335
 463
 464 ----------------------------------------------------------------
 465 110653  AMD64 valgrind crashes on sarb $0x4,foo(%rip) instruction
 466
 467 FIXED-TRUNK:    vex:1334
 468 FIXED-30BRANCH: vex:1336
 469
 470 ----------------------------------------------------------------
 471 110656  PATH=/usr/bin::/bin valgrind foobar stats ./fooba
 472
 473 FIXED-TRUNK:    vg:4386
 474 FIXED-30BRANCH: vg:4395
 475
 476 ----------------------------------------------------------------
 477 110657  Small test fixes
 478
 479 (1) Filter out L3 cache warning messages causing problems
 480 (2) Stop tests/mq failing on 2.4 kernels
 481
 482 I suppose it would be good to apply these.  They seem low risk.
 483
 484 FIXED-TRUNK:    vg:4429
 485 FIXED-30BRANCH: vg:4458
 486
 487 ----------------------------------------------------------------
 488 110671  vex x86->IR: unhandled instruction bytes: 0xF3 0xC3 (rep ret)
 489
 490 FIXED-TRUNK:    vex:1332
 491 FIXED-30BRANCH: vex:1338
 492
 493 ----------------------------------------------------------------
 494 110685  amd64->IR: unhandled instruction bytes: 0xE1 0x56 (loope Jb)
 495
 496 FIXED-TRUNK:    vex:1349
 497 FIXED-30BRANCH: vex:1356
 498
 499 ----------------------------------------------------------------
 500 110830  configuring with --host fails to build 32 bit on 64 bit target
 501
 502 FIXED-TRUNK:    vg:4442
 503 FIXED-30BRANCH: vg:4459
 504
 505 ----------------------------------------------------------------
 506 110875  Assertion when execve fails
 507
 508 FIXED-TRUNK:    vg:4435
 509 FIXED-30BRANCH: vg:4457
 510
 511 ----------------------------------------------------------------
 512 110898  opteron instructions missing: btq sbbq btsq btrq bsfq
 513
 514 FIXED-TRUNK:    vex:1352
 515 FIXED-30BRANCH: vex:1357
 516
 517 ----------------------------------------------------------------
 518 110954  x86->IR: unhandled instruction bytes: 0xE2 0xF6 (loop Jb)
 519
 520 FIXED-TRUNK:    vex:1343
 521 FIXED-30BRANCH: vex:1358
 522
 523 ----------------------------------------------------------------
 524 111006  bogus warnings from linuxthreads
 525
 526 FIXED-TRUNK:    vg:4469, vg:4470
 527 FIXED-30BRANCH: vg:4497, vg:4498
 528
 529 ----------------------------------------------------------------
 530 111090  Internal Error running Massif
 531 111808  ==
 532 112098  ==
 533
 534 FIXED-TRUNK:    vg:4492
 535 FIXED-30BRANCH: vg:4509
 536
 537 ----------------------------------------------------------------
 538 111092  x86: dis_Grp2(Reg): unhandled case(x86)
 539
 540 FIXED-TRUNK:    vex:1341
 541 FIXED-30BRANCH: vex:1359
 542
 543 ----------------------------------------------------------------
 544 111102 (comment #4)   Fixed 64-bit unclean "silly arg" message
 545
 546 FIXED-TRUNK:    vg:4476
 547 FIXED-30BRANCH: vg:4502
 548
 549 ****** not yet closed
 550
 551 ----------------------------------------------------------------
 552 111231  sctp_getladdrs() and sctp_getpaddrs() returns uninitialized
 553         memory
 554
 555 FIXED-TRUNK:    vg:4549
 556 FIXED-30BRANCH: vg:4563
 557
 558 ----------------------------------------------------------------
 559 111513  Illegal opcode for SSE instruction (x86 movups)
 560 NB.  Bug reporter did not yet verify that the fix works.
 561
 562 FIXED-TRUNK:    vex:1362
 563 FIXED-30BRANCH: vex:1367
 564
 565 ----------------------------------------------------------------
 566 111555  VEX/Makefile: CC is set to gcc
 567
 568 FIXED-TRUNK:    vex:1364, vg:4559
 569 FIXED-30BRANCH: vex:1365, vg:4560
 570
 571 ----------------------------------------------------------------
 572 CrispinF x86 %eflags.ac problem
 573
 574 FIXED-TRUNK:    vex:1319/vg:4334
 575 FIXED-30BRANCH: vex:1326, and vg:4334 was copied across as part of vg:4364
 576
 577 ----------------------------------------------------------------
 578 n-i-bz  XML <unique> printing wrong
 579
 580 FIXED-TRUNK:    vg:4355,vg:4357,vg:4358
 581 FIXED-30BRANCH: vg:4585
 582
 583 ----------------------------------------------------------------
 584 n-i-bz  Dirk r4359 (amd64 syscalls from trunk)
 585
 586 FIXED-TRUNK:
 587 FIXED-30BRANCH: vg:4359
 588
 589 ----------------------------------------------------------------
 590 n-i-bz  Dirk r4360 (upd email addrs from trunk)
 591
 592 FIXED-TRUNK:
 593 FIXED-30BRANCH: vg:4360
 594
 595 ----------------------------------------------------------------
 596 n-i-bz  Nick r4384 (stub implementations of Addrcheck and Helgrind)
 597
 598 FIXED-TRUNK:    vg:4384
 599 FIXED-30BRANCH: vg:4397
 600
 601 ----------------------------------------------------------------
 602 n-i-bz  Nick (Cachegrind should not assert when it encounters a client
 603 request.)
 604
 605 FIXED-TRUNK:    vg:4391
 606 FIXED-30BRANCH: vg:4393
 607
 608 ----------------------------------------------------------------
 609 Updates to Memcheck manual
 610
 611 FIXED-TRUNK:    vg:4419, vg:4427, vg:4434
 612 FIXED-30BRANCH: vg:4455
 613
 614 ----------------------------------------------------------------
 615 Fixed broken malloc_usable_size()
 616
 617 FIXED-TRUNK:    vg:4439
 618 FIXED-30BRANCH: vg:4453
 619
 620 ----------------------------------------------------------------
 621 Make suppressions work for "???" lines in stacktraces.
 622
 623 FIXED-TRUNK:    vg:4447
 624 FIXED-30BRANCH: vg:4451
 625
 626 ----------------------------------------------------------------
 627 n-i-bz  vex x86->IR: unhandled instruction bytes: 0x14 0x0
 628
 629 FIXED-TRUNK:    vex:1350 (basic fix), vex:1351 (x86 adc/sbb flags thunk fix),
 630                                   vex:1353 (amd64 adc/sbb flags thunk fix)
 631 FIXED-30BRANCH: vex:1360
 632
 633 ----------------------------------------------------------------
 634 n-i-bz  minor umount/fcntl wrapper fixes
 635
 636 FIXED-TRUNK:    vg:4487
 637 FIXED-30BRANCH: vg:4562
 638
 639 ----------------------------------------------------------------
 640 n-i-bz  Fix XML bugs in FAQ
 641
 642 FIXED-TRUNK:    vg:4528
 643 FIXED-30BRANCH: vg:4564
 644
 645
 646 ========================================================================
 647 === Bugs of note not targeted for any particular release
 648 ========================================================================
 649
 650 ----------------------------------------------------------------
 651 n-i-bz  x86 INT/INT3
 652
 653 Not started.  Seems low priority.
 654
 655 FIXED-TRUNK:    TODO?
 656
 657 ----------------------------------------------------------------
 658 87263  x86 segment stuff
 659
 660 Not started.  Seems low priority.
 661
 662 FIXED-TRUNK:    TODO?
 663
 664 ----------------------------------------------------------------
 665 88116 x86 enter variants assert
 666
 667 Not started.  Seems low priority.
 668
 669 FIXED-TRUNK:    TODO?
 670
 671 ----------------------------------------------------------------
 672 96542 x86 16-bit pop insns
 673
 674 Not started.  Seems low priority.
 675
 676 FIXED-TRUNK:    TODO?
 677
 678 ----------------------------------------------------------------
 679 110207 mpn accuracy +
 680 110240 x86 FP differences
 681
 682 Can't be easily fixed (x86 rounding/precision problem)
 683 + not convinced it's a big problem
 684
 685 FIXED-TRUNK:    TODO?
 686
 687 ----------------------------------------------------------------
 688 110669  valgrind attach to gdb and quitting gdb hangs valgrind
 689
 690 Not clear if this is really a Valgrind bug.
 691
 692 FIXED-TRUNK:    TODO?
 693
 694 ----------------------------------------------------------------
 695 111898  Need to control file name that cachegrind writes into
 696
 697 FIXED-TRUNK:    TODO?