Re: How to make aot native-compilation and pdmp creation reproduceable

[Björn Bidar]

Gerd Möllmann <gerd.moellmann@gmail.com> writes:

>> One example of pdmp of one of the variants:
>> /usr/bin/emacs-x11 differs in ELF sections
>> --- old /usr/bin/emacs-x11 (objdump)
>> +++ new /usr/bin/emacs-x11 (objdump)
>> @@ -519888,8 +519888,8 @@
>>   7f1410 2d2d6e6f 2d73706c 61736800 00000000  --no-splash.....
>>   7f1420 00400000 00000000 00000000 00000000  .@..............
>>   7f1430 00000000 00000000 00000000 00000000  ................
>> - 7f1440 81e3b8e4 33011ec5 18db85f2 9586197c  ....3..........|
>> - 7f1450 be6fb703 f761afd4 c6d7bd74 f2168be2  .o...a.....t....
>> + 7f1440 a2c05c34 51540c6d eae96bed 21a90a3c  ..\4QT.m..k.!..<
>> + 7f1450 c0cf321a e7c634d2 89ae7791 2fe90967  ..2...4...w./..g
>>   7f1460 2c010000 00000000 20003900 00000000  ,....... .9.....
>>   7f1470 ffffffff 15000000 3e000000 7c000000  ........>...|...
>>   7f1480 12000000 00000000 00000000 00000000  ................
>
> That's confusing.  Is that an executable, if you do an objdump?  You
> write it's an example of pdmp.
Th Emacs executable also changes each time.
Oh that's an oversight on my side. Here is the diff:
/usr/libexec/emacs/29.1/x86_64-suse-linux/emacs-x11.pdmp differs at offset '17' 
(GNU/Emacs pdumper image)
--- old /usr/libexec/emacs/29.1/x86_64-suse-linux/emacs-x11.pdmp (hex)
+++ new /usr/libexec/emacs/29.1/x86_64-suse-linux/emacs-x11.pdmp (hex)
@@ -1,6 +1,6 @@
 00000000  44 55 4d 50 45 44 47 4e  55 45 4d 41 43 53 00 00  |DUMPEDGNUEMACS..|
-00000010  81 e3 b8 e4 33 01 1e c5  18 db 85 f2 95 86 19 7c  |....3..........||
-00000020  be 6f b7 03 f7 61 af d4  c6 d7 bd 74 f2 16 8b e2  |.o...a.....t....|
+00000010  a2 c0 5c 34 51 54 0c 6d  ea e9 6b ed 21 a9 0a 3c  |..\4QT.m..k.!..<|
+00000020  c0 cf 32 1a e7 c6 34 d2  89 ae 77 91 2f e9 09 67  |..2...4...w./..g|
 00000030  98 ce c2 00 bc d7 08 00  88 2d e6 00 5b 00 00 00  |.........-..[...|
 00000040  f8 2e e6 00 b8 16 00 00  d8 89 e6 00 e3 e9 03 00  |................|
 00000050  68 31 f6 00 03 0d 00 00  20 4c 98 00 00 00 9c 00  |h1...... L......|

Here is the diff of the matching Emacs binary:
/usr/bin/emacs-x11 differs in ELF sections
--- old /usr/bin/emacs-x11 (objdump)
+++ new /usr/bin/emacs-x11 (objdump)
@@ -519888,8 +519888,8 @@
  7f1410 2d2d6e6f 2d73706c 61736800 00000000  --no-splash.....
  7f1420 00400000 00000000 00000000 00000000  .@..............
  7f1430 00000000 00000000 00000000 00000000  ................
- 7f1440 81e3b8e4 33011ec5 18db85f2 9586197c  ....3..........|
- 7f1450 be6fb703 f761afd4 c6d7bd74 f2168be2  .o...a.....t....
+ 7f1440 a2c05c34 51540c6d eae96bed 21a90a3c  ..\4QT.m..k.!..<
+ 7f1450 c0cf321a e7c634d2 89ae7791 2fe90967  ..2...4...w./..g
  7f1460 2c010000 00000000 20003900 00000000  ,....... .9.....
  7f1470 ffffffff 15000000 3e000000 7c000000  ........>...|...
  7f1480 12000000 00000000 00000000 00000000  ................

(I had to rebuild to get new logs)

I also attach the full diff to this message.

nachbau.emacs.log
Description: Text Data