Hexspeak in pascal
lazarus / 64-FPC development

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af0815 · 2021-03-22 14:43

There are special byte combination in fpc = Hexspeak ?
https://en.wikipedia.org/wiki/Hexspeak

$DEADBEEF and $AAAAAAAA are samples, maybe used in heaptrace and
trashed variables. Are there other values known ?

Actual i found always $40ba4444 in a pointer, when i got a sigsegv. Is
this a known hexspeak value ?

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Martin_fr · 2021-03-22 16:01

About -gt
https://lists.freepascal.org/pipermail/fpc-devel/2010-June/020337.html

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lucamar · 2021-03-22 16:04

I would consider it more a "magic number" than hexspeak. After all,
it's unpronunceable. Unless it's meant as 40 l33t-sheep's
"baaaaaah"-ing

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af0815 · 2021-03-22 19:14

$55555555, $EFEFEFEF are the values from fpc.devel list.

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440bx · 2021-03-22 19:23

reminds me of a tweet by an intellectually deficient biped who
demonstrated his impaired verbal abilities by shouting $C0FEFE in the
middle of the night.

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PascalDragon · 2021-03-23 08:59

Not exactly hexspeak, but the exception code used for FPC exceptions
for the Windows Structured Exception Handling is $E0465043. The E in
the first Byte is for “exception” and the remaining three are the
ASCII values for F, P and C

And the exception class for POSIX exceptions would be
$0053415031435046 which is #0'SAP1CPF' or, with the order corrected:
'FPC1PAS'#0.