Re: scratch/igc 90e80a9a53e 6/6: Adjust igc.c code to header changes

[Eli Zaretskii <eliz@gnu.org>]

Hi,

This commit, or the few ones preceding it, broke the build for me:

  Loading d:/gnu/git/emacs/feature/lisp/leim/leim-list.el (source)...
  Finding pointers to doc strings...
  Finding pointers to doc strings...done
  Dumping under the name bootstrap-emacs.pdmp
  Dumping fingerprint: a1fe182420f021f394b12a862c4306fde3b9547d4943b4f87b1e36e1e602a4f1

  Error: error ("Memory exhausted--use M-x save-some-buffers then exit and restart Emacs")
    dump-emacs-portable("d:/gnu/git/emacs/feature/src/bootstrap-emacs.pdmp")

The last commit that did build was 55670e0.

The backtrace from the call to memory_full is below.  The reason seems
to be the recent changes in igc_dump_finish_obj: the result is that
dump_igc_finish_obj wants to write a preposterously large amount of
zeros into the dump: 744MB in the backtrace below, but I've seen much
larger numbers there, like 1.2GB(!).  This causes dump_grow_buffer
requests 2GB from the OS, which rightfully fails.

  Dumping under the name bootstrap-emacs.pdmp
  Dumping fingerprint: a1fe182420f021f394b12a862c4306fde3b9547d4943b4f87b1e36e1e602a4f1

  Thread 1 hit Breakpoint 2, memory_full (nbytes=nbytes@entry=1073741824)
      at alloc.c:4532
  4532    {
  (gdb) bt
  #0  memory_full (nbytes=nbytes@entry=1073741824) at alloc.c:4532
  #1  0x0074a65e in xrealloc (block=0x3a320020, size=1073741824) at alloc.c:829
  #2  0x0074fb1d in dump_grow_buffer (ctx=0x724eb38, ctx=0x724eb38)
      at pdumper.c:627
  #3  dump_write (nbyte=<optimized out>, buf=<optimized out>,
      ctx=<optimized out>) at pdumper.c:798
  #4  dump_write (ctx=0x724eb38, buf=0x724e848, nbyte=8) at pdumper.c:792
  #5  0x0074fc61 in dump_write_zero (ctx=ctx@entry=0x724eb38, nbytes=744574048)
      at pdumper.c:876
  #6  0x0074fdca in dump_igc_finish_obj (ctx=ctx@entry=0x724eb38)
      at pdumper.c:937
  #7  0x0075319c in dump_object_finish (sz=<optimized out>, out=<optimized out>,
      ctx=<optimized out>) at pdumper.c:1000
  #8  dump_float (lfloat=<optimized out>, ctx=<optimized out>) at pdumper.c:2381
  #9  dump_object (ctx=0x724eb38, ctx@entry=0x724eb3c, object=XIL(0xcbf005))
      at pdumper.c:3306
  #10 0x0075571a in dump_drain_copied_objects (ctx=0x724eb3c) at pdumper.c:3518
  #11 Fdump_emacs_portable (filename=<optimized out>,
      track_referrers=<optimized out>) at pdumper.c:4502
  #12 0x0077ae26 in eval_sub (form=XIL(0xbb30653)) at eval.c:2630
  #13 0x0077ac31 in eval_sub (form=XIL(0xbb30593)) at eval.c:2578
  #14 0x0077afb3 in Fprogn (body=XIL(0xbb3084b)) at eval.c:452
  #15 0x0077c058 in Flet (args=<optimized out>) at lisp.h:1545
  #16 0x0077ac31 in eval_sub (form=XIL(0xbb304ab)) at eval.c:2578
  #17 0x0077c906 in Funwind_protect (args=XIL(0xbb3085b)) at lisp.h:1545
  #18 0x0077ac31 in eval_sub (form=XIL(0xbb3049b)) at eval.c:2578
  #19 0x0077afb3 in Fprogn (body=XIL(0)) at eval.c:452
  #20 0x0077c058 in Flet (args=<optimized out>) at lisp.h:1545
  #21 0x0077ac31 in eval_sub (form=XIL(0xbb3046b)) at eval.c:2578
  #22 0x0077afb3 in Fprogn (body=XIL(0xbb3131b)) at eval.c:452
  #23 0x0077c058 in Flet (args=<optimized out>) at lisp.h:1545
  #24 0x0077ac31 in eval_sub (form=XIL(0xbb2ff0b)) at eval.c:2578
  #25 0x0077ac31 in eval_sub (form=XIL(0xbb2feeb)) at eval.c:2578
  #26 0x0077afb3 in Fprogn (body=XIL(0)) at eval.c:452
  #27 0x0077ac31 in eval_sub (form=form@entry=XIL(0xbb2f9d3)) at eval.c:2578
  #28 0x007b6f24 in readevalloop (readcharfun=readcharfun@entry=XIL(0x60c0),
      infile0=infile0@entry=0x724f638,
      sourcename=sourcename@entry=XIL(0xa848184),
      printflag=printflag@entry=false, unibyte=unibyte@entry=XIL(0),
      readfun=readfun@entry=XIL(0), start=start@entry=XIL(0),
      end=<optimized out>, end@entry=XIL(0)) at lread.c:2537
  #29 0x007b797b in Fload (file=<optimized out>, noerror=XIL(0),
      nomessage=XIL(0), nosuffix=XIL(0), must_suffix=<optimized out>)
      at lisp.h:1213
  #30 0x0077adc3 in eval_sub (form=form@entry=XIL(0xa847e4b)) at eval.c:2641
  #31 0x0077cefd in Feval (form=XIL(0xa847e4b), lexical=lexical@entry=XIL(0x20))
      at eval.c:2486
  #32 0x006d5d51 in top_level_2 () at lisp.h:1213
  #33 0x0077527c in internal_condition_case (
      bfun=bfun@entry=0x6d5cf3 <top_level_2>, handlers=handlers@entry=XIL(0x60),
      hfun=hfun@entry=0x6df806 <cmd_error>) at eval.c:1633
  #34 0x006d6460 in top_level_1 (ignore=XIL(0)) at lisp.h:1213
  #35 0x00775196 in internal_catch (tag=tag@entry=XIL(0xc520),
      func=func@entry=0x6d6437 <top_level_1>, arg=arg@entry=XIL(0))
      at eval.c:1312
  #36 0x006d5b0f in command_loop () at lisp.h:1213
  #37 0x006df3c4 in recursive_edit_1 () at keyboard.c:765
  #38 0x006df6b2 in Frecursive_edit () at keyboard.c:848
  #39 0x00921485 in main (argc=<optimized out>, argv=<optimized out>)
      at emacs.c:2646